WO2004087441A1

WO2004087441A1 - Automatic air supply mechanism of pneumatic tire

Info

Publication number: WO2004087441A1
Application number: PCT/JP2003/015820
Authority: WO
Inventors: Takaji Nakano
Original assignee: Takaji Nakano
Priority date: 2003-03-28
Filing date: 2003-12-10
Publication date: 2004-10-14
Also published as: TW200500234A; CN1767960A; JPWO2004087442A1; JP4538409B2; CN100398347C; TWI343877B; AU2003289019A1

Abstract

An automatic air supply mechanism capable of increasing the produced amount of compressed air with less number of rotations of a wheel body and producing the compressed air with a small force, comprising two compressed air producing parts formed of a first compressed air producing part (1a) and a second compressed air producing part (1b) and compressed air supply passages (2a) and (2b) for pneumatic tire supplying the compressed air produced by the compressed air producing parts to the pneumatic tire. The first compressed air producing part (1a) and the second compressed air producing part (1b) are installed on the hub drum (102a) of a hub body (102) at positions circumferentially spaced by 180°each other, and when a vehicle travels, the first compressed air producing part (1a) and the second compressed air producing part (1b) alternately produce the compressed air.

Description

Description Automatic air supply mechanism for pneumatic tires See related application ·

The entire disclosure of the S-home patent application No. 0900 / 7.9 in 2003 (filed on March 28, 2003), including the specification, claims, drawings and abstract The disclosure is incorporated by reference into the present application. Technical field

The present invention relates to a pneumatic tire automatic air supply mechanism that can generate compressed air and supply the compressed air to a pneumatic tire when a wheel body rotates with respect to an axle. Background art

For example, wheels of bicycles and automobiles are provided with pneumatic tires that hold air. In such a pneumatic tire, even if air is supplied so as to have a predetermined air pressure, the air is gradually released as time passes, and the air pressure is reduced. If the air pressure is too low, the ride will be uncomfortable and the steering wheel will be difficult to operate. Therefore, when the air pressure drops significantly below the predetermined pressure, it is necessary to supply air to the pneumatic tires by an air pump such as an air pump. However, when supplying air to a pneumatic tire by, for example, a pneumatic pump, the operation of the pneumatic pump requires considerable power. Therefore, for example, there is a problem that it is difficult for a person with weak power to operate the air pump, and it is not easy to supply the air. Disclosure of the invention

The invention of the present application has been proposed in view of the above situation. Even if an air pump is not used, when the air pressure of the pneumatic tire becomes lower than a predetermined value, the pneumatic tire automatically rotates by rotation of the pneumatic tire with respect to the axle. Air tires that can supply air to the The purpose is to provide a dynamic supply mechanism.

Another object of the present invention is to provide an automatic air supply mechanism for an air tire, which is less likely to cause water such as rainwater to enter the compressed air generator.

Another object of the present invention is to provide an automatic pneumatic tire air supply mechanism capable of increasing the amount of compressed air generated with a small number of rotations of the wheel body and generating compressed air with a small force.

The present invention further provides a pneumatic tire capable of generating a sufficient amount of compressed air in a short traveling distance and supplying compressed air to a pneumatic tire of a vehicle such as a wheelchair having a short traveling distance and a small number of wheel rotations in a normal traveling. The purpose of the present invention is to provide an automatic air supply mechanism.

The present invention further provides an automatic air supply mechanism that can increase the amount of compressed air generated with a small number of rotations of the wheel body and can generate compressed air with a small force. The purpose of the present invention is to provide an automatic air supply mechanism that can supply air to other parts of a vehicle other than pneumatic tires while supplying air to the vehicle. Another object of the present invention is to provide an automatic air supply mechanism for an air tire that can reduce the rotational resistance of the wheel main body with respect to the axle.

An automatic air supply mechanism for a pneumatic tire according to the present invention is an automatic air supply mechanism for a pneumatic tire capable of automatically supplying air to a pneumatic tire provided on a wheel body rotatable with respect to an axle of a vehicle,

A compressed air generator is provided for generating compressed air when the wheel body rotates with respect to the axle, and the compressed air generated by the compressed air generator can be supplied to the pneumatic tire.

Although the features of the present invention can be broadly shown as described above, the structure and contents thereof, together with the intended features, will be further clarified by taking the drawings into consideration and the following disclosure. There will be. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of a bicycle wheel having an automatic air supply mechanism according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional explanatory view taken along the line II-II of FIG. FIG. 3 is an explanatory sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional explanatory view of a main part showing a second ventilation path and a third ventilation path.

FIG. 5 is a sectional view taken along line V_V of FIG.

FIG. 6 is an explanatory cross-sectional view showing a state in which the sliding portion of the compressed air generation unit has slid to the uppermost position from the state shown in FIG.

FIG. 7 is an explanatory sectional view taken along the line VII-VII in FIG.

FIG. 8 is an enlarged cross-sectional explanatory view along the line VIII-VIII of FIG. FIG. 9 is a side view of wheels of a wheelchair having the automatic air supply mechanism of the second embodiment.

FIG. 10 is an enlarged cross-sectional explanatory view along the line X-X in FIG. 9.

FIG. 11 is an explanatory sectional view taken along line XI-XI of FIG. '' Fig. 12 shows that the sliding part of the first compressed air generation part slid to the uppermost position and the sliding part of the second compressed air generation part slid from the state of Fig. 10 to the lowermost position. FIG. 4 is an explanatory sectional view of a state.

Fig. 13 shows the state where the sliding part of the first compressed air generator slides to the uppermost position and the sliding part of the second compressed air generator slides to the lowermost position from the state of Fig. 11. FIG.

FIG. 14 is a side view of a bicycle having an automatic air supply mechanism according to the third embodiment of the present invention.

FIG. 15 is an enlarged sectional explanatory view of a main part of the automatic air supply mechanism of the third embodiment. FIG. 16 is an explanatory view showing the rotary connecting member in a vertical section.

FIG. 17 is an explanatory view showing a cross section of the rotary connection member.

FIG. 18 is an enlarged sectional view of a part of a saddle portion of a bicycle having the automatic air supply mechanism according to the third embodiment.

FIG. 19 is an explanatory diagram of an automatic air supply mechanism according to a fourth embodiment of the present invention. FIG. 20 is an enlarged sectional explanatory view of a brake device for a bicycle having the automatic air supply mechanism according to the fourth embodiment.

FIG. 21 is an enlarged cross-sectional explanatory view of a state in which the brake wire is operated from the state of FIG. 20 to bring the play shoe into contact with the drum. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a side view of a bicycle wheel provided with an automatic pneumatic tire air supply mechanism according to a first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional explanatory view taken along line II-II of FIG. 3 in Figure 2

FIG. 1 is an explanatory sectional view taken along the line I II—II I.

The automatic pneumatic tire air supply mechanism of this embodiment is provided on the front wheel 100 of the bicycle. The bicycle wheel 100 having the automatic pneumatic tire air supply mechanism includes an axle 101 and a wheel body 110 rotatable with respect to the axle 101.

The axle 101, as shown in FIG. 2, was screwed and fixed to each of the left and right sides of the axle main body 101d having a threaded portion 101a on the outer periphery and the axle main body 101d. It is provided with a cone 1101b, 101b and a pipe-shaped positioning member 114. Incidentally, the positioning members 114 will be described later.

The wheel main body 110 includes a hub body 102, a pneumatic tire 103, and an automatic air supply mechanism, as shown in FIG. As shown in FIG. 2, the knob body 102 has a cylindrical hub body 102 a, a right support part 102 b fixed to each of the left and right sides of the hub body 102 a, and a left side. And a support portion 102c.

These support portions 102b and 102c are non-rotatably attached to the hub body 102a so as to fit the outer periphery of the hub body 102a. Also, the hub body 1 0

2 A right support part 102 b and left support part 102 c are attached to each of the left and right sides of a, so that the inside of the hub body 102 is divided into the outside space 1 1 1 Are defined.

In addition, when each of these support portions 102b, 102c is fitted to the outer periphery of the hub body 102a, a ring-shaped waterproof packing made of synthetic rubber is provided between the two. , 1 12 are provided, whereby water enters the compartment 1 1 from between each support 102 b, 102 c and the outer periphery of the hub 102 a. Not to be.

Rollers receive the steel ball inside the radial direction of each support part 102b, 102c A steel ball receiving portion 102 d and a plurality of steel balls 107 to 107 rotatably arranged in the steel ball receiving portion 102 d are provided. Further, axle holes 102 e and 102 e through which the axle 101 passes are provided inside the steel ball receiving portion 102 d in the radial direction.

Then, as shown in FIG. 4, the axle 101 is passed through these axle holes 102 e, and the pushers 110 1 b and 10 lb screwed to the axle body 101 d are formed. A plurality of steel balls 107 ... 107 are provided between the steel ball receiving portion 102 d and the grease (not shown) so as to be rollable, and these steel balls 107. .. The steel ball receiver 102 is rotatably supported by the axle main body 101d via 107. Thus, the hap body 102 is rotatable with respect to the axle 101.

A flange 10 having a plurality of spoke holes 10 2 f ... 10 2 f as shown in FIGS. 2 and 3 is provided on the outer side in the radial direction of each of the support portions 102 b and 102 c. 2 g and 102 g are provided. The base end of each spoke 104 (shown in FIG. 1) is locked in each spoke hole 102 f ... 102 f of each flange 102 g. Further, as shown in FIG. 1, the distal end of each of the spokes 104 locked is locked to the rim 105. As a result, the rim 105 is fixed to the hub body 102 and is rotatable with respect to the axle 101.

The pneumatic tire 103 is detachably locked to the rim 105 so that it can rotate with the rim 105 relative to the axle 101. Also, as shown in FIG. 8, an air holding tube 103 b as an air holding portion for holding air is provided inside the pneumatic tire 103.

The air holding tube 103b is provided with a valve 106 for taking in and out of air. The valve 106 is formed of a cylindrical body, and is provided with an air inlet 106a at the lower end of the figure and a valve hole 106b at the upper end of the figure. Further, the valve hole 106 b is closed by a synthetic rubber tubular backflow prevention valve 106 c covered on the outer periphery of the valve 106.

The pulp 106 is put into a cylindrical valve mounting base 103 c provided in the air holding tube 103 b and screwed into the valve mounting base 103 c. The retaining nut is retained by 106 d. Then, from the air inlet b 106 a, the elasticity of the check ring 106 c closing the valve hole 106 b is increased. When air is pumped in by an air pump or the like, the check valve 10c is pushed away and air enters the air holding tube 103b. After air enters the air holding tube 103b, the valve hole 106b is closed by the elasticity of the check ring 106c. This prevents air in the air holding tube 103b from going out of the valve hole 106b. The check valve 106 c, valve mounting base 103 c and valve stopper nut 106 d are used for the air holding tube 103 b of general bicycle wheels. However, the present invention is not limited to the one using this form, and can be used with appropriate modification. Further, the automatic pneumatic supply mechanism of the present invention does not necessarily require the valve 106 in such a pneumatic tire 103, and can be applied to a pneumatic tire 103 having no valve 106. Further, when providing pulp, not only the English type valve (Woods valve) shown in FIG. 8 described above, but also a US type valve (Schrader valve) or a French type valve (French valve) can be used. Can be changed as appropriate.

The left and right sides of the axle 101 thus configured are fixed to the bicycle body via nuts 108, 108 (shown in FIG. 2). As a result, the wheel body 110 can rotate on the bicycle body.

Next, the automatic air supply mechanism will be described. The automatic air supply mechanism for a bicycle air tire according to this embodiment includes an air feeding unit that generates compressed air and sends the compressed air to a pneumatic tire. As shown in FIGS. 2 and 3, this air feeding section is used to guide the compressed air generated by the compressed air generating section 1 for generating compressed air to the pneumatic tire 103 for supply. And a compressed air supply path 2 for pneumatic tires.

The compressed air generator 1 includes a compression chamber 31 for compressing air, a piston element 32 as a compression operation body for compressing the air in the compression chamber 31, and taking in air from the outside into the compression chamber 31. And a waterproof mechanism 51, 5, 2, 54, 55 for preventing water from entering the compression chamber 31 from the air intake 4. The compression chamber 31 is formed inside an inner casing 3a having a circular cross section. An outer casing 3b having a circular cross section is non-rotatably disposed on the outer peripheral side of the inner casing 3a. Also, at the base end side of the outer casing 3 b, hub mounting portions 30 b, 30 b (shown in Fig. 3). The hub mounting portions 30b, 30b are fixed to the outer periphery of the hub body 102a of the haptic body 102 via bolts 30c, 30c. As a result, the inner casing 3a is attached to the outer periphery of the hub body 102a of the haptic body 102 via the outer casing 3b, and the outer periphery of the hub body 102a of the hub body 102 is formed. It is projected to the side.

A partition wall 7 is provided inside the inner casing 3a attached to the hub body 102 in this manner. The partition wall 7 allows the inner part of the inner casing 3 a to communicate with the lower compression chamber 31 in the figure and the communication supply path 13 b of the pneumatic tire compressed air supply path 2 described later in the upper part of the figure. It is sectioned.

The piston member 32 that compresses the air in the compression chamber 31 configured as described above includes a rod-like piston rod 33 as an operation body and a cam contact that abuts a cam surface 91 a of a cam 9 described later. A contact portion 35 and a cam holding portion held by the cam 9 are provided. The piston port 33 is slidably passed through a cylindrical port guide member 38 made of synthetic rubber provided in the inner casing 3a, so that the upper part of the piston rod 33 in FIG. The tip on the side is placed in the compression chamber 31. In this state, the piston rod 33 is positioned outside the cam surface 91a of the cam 9 in the radial direction so that the axis of the piston rod 33 and the axis of the compression chamber 31 substantially match. ing. A sliding portion 34 is provided at the tip of the piston rod 33.

The sliding portion 34 is formed to have a diameter substantially equal to the inner peripheral diameter of the compression chamber 31, and extends along the inner peripheral wall of the compression chamber 31 in the axial direction of the compression chamber 31, that is, the axle 101. It is slidable in the radial direction of the extension cam 9. In addition, the sliding portion 34 is provided with a ring-shaped packing 34 a made of synthetic rubber.

The base end of the piston rod 33 on the lower side in the figure is passed through the rod guide member 38 of the compression chamber 31 and into the piston introduction hole 115 drilled in the hap cylinder 102a. It is placed in the compartment 1 1 1 of the body 102. A cam abutting portion 35 and a cam holding portion are provided at the base end of the piston rod 33. In this embodiment, as shown in FIG. 2, the cam contact portion 35 is formed of a part of the outer periphery of a rotatable roller 37. More specifically, the roller 37 includes a part of the piston rod 33 between the piston rod 33 and the cam surface 91 a of the cam 9. From the cam surface 91 a side of the cam 9, and in this state, the cam 9 is rotatably attached to the female rod 33 by a holding shaft 36. A part of the outer periphery of the roller 37 protruding toward the cam surface 91a forms a cam contact portion 35. The cam contact portion 35 in this embodiment is formed on an axial extension line q that extends the axis of the piston rod 33.

In this embodiment, the cam holding section is constituted by a part of the holding shaft 36 to which the roller 37 is attached. More specifically, the holding shaft 36 is passed through a shaft insertion hole formed in the piston rod 33 and a shaft hole formed in the roller 37, and the left side of the piston rod 33. And is attached to the piston opening 3 in that state. The projecting portion 36 a of the holding shaft 36 constitutes a cam holding portion held by the cam 9.

The cam 9 around which the roller 37 rolls and rolls, has a cam body 91 having a circular cam surface 91a abutting the roller 37 on the outer periphery, and a biston member 32 can be removed freely. A biston holding portion 92 as an operating body holding portion for holding is provided. The piston holding portion 92 is formed of a disk. A cam body receiving hole 92 a for rotatably receiving the cam body 91 is provided at the center of the piston holding portion 92. By receiving the cam main body 91 in the cam main body receiving hole 92a, the piston holding portion 92 is moved to the left side in the axial direction of the force surface 91a of the force main body 91. Is coordinated.

Further, a shaft fitting hole 9 2 for rotatably fitting the protrusion 36 a of the holding shaft 36 of the piston member 32 on the outer peripheral side of the force main body receiving hole 92 a in the biston holding portion 92. b · · · 9 2 b is provided. The projection 36a of the holding shaft 36 is fitted in the shaft fitting hole 92b so as to be able to be taken in and out. In this embodiment, the shaft fitting holes 9 2b ··· 9 2b are circumferentially arranged on the same circumference centered on the axis of the cam body receiving hole 92 a of the shaft support member 92. Approximately 120. It is composed of three sections, each of which is separated by three sections. Then, the protrusion 36a of the holding shaft 36 may be fitted into any of the three shaft fitting holes 92b, 92b.

In this way, the piston member 32 of the compressed air generating part 1 is connected via the holding shaft 36. And is detachably held by the cam 9. Therefore, in this embodiment, there is no coil panel for biasing the piston 37 that presses the roller 37 of the piston member 32 constantly against the cam surface 91a. Is composed of a positive cam held by the cam 9 so that the roller 37 of the biston member 32 is always in contact with the force surface 91a, and the cam surface is rotated with the rotation of the hap body 102. 9 1a can be run. Note that the piston member 32 is not limited to the one held by the cam 9, but a coil spring for urging the piston rod is provided, and the piston member 32 is always in contact with the cam surface 91a by the coil spring for urging the piston rod. Good to press on. Further, as shown in FIG. 3, the cam 9 has an axle insertion hole 93 through which the axle 101 is inserted. The center O2 of the axle through hole 93 is separated from the center O1 of the cam surface 91a by a predetermined distance.

After the axle 101 is passed through the axle through hole 93, it is fixed to the axle 101 from both left and right sides by cam fixing nuts 44, 44 as shown in FIG. The position of this cam fixing nut 44 with respect to the ball push 101 b is determined by a positioning member 114 provided on the axle 101. Then, in this fixed state, as shown in FIG. 3, the center 車 2 of the axle 揷 through hole 93 coincides with the rotation center O3 of the hub body 102.

Accordingly, in the state shown in FIGS. 2 and 3, the position of the cam surface 91 a with which the roller 37 of the compressed air generating part 1 is in contact with the roller 37 becomes the smallest from the center O 2 of the axle 揷 through hole 93. It becomes small diameter part A. In addition, the distance from the center O2 of the axle 揷 through hole 93 in the circumferential direction from the small diameter portion A gradually increases, and at a position where it is halfway around, the center O of the axle 揷 through hole 93

The large-diameter portion B where the distance from 2 is the largest is obtained.

Also, when the roller 37 comes to the small diameter portion A of the cam surface 91a, the sliding portion 34 of the piston hole 33 moves the compression chamber 31 as shown in FIGS. The lowest position A 1 descends most and maximizes the volume of the compression chamber 31. On the other hand, when the mouth 37 comes to the large diameter portion B of the cam surface 91a, as shown in FIGS.

4 is the uppermost position B 1 where the compression chamber 31 is moved up the most and the volume of the compression chamber 31 is minimized.

As described above, the air intake port 4 of the compressed air generation unit 1 It is for supplying air from them. In this embodiment, as shown in FIG. 2, the sliding portion 34 of the piston rod 33 moves from the lowermost position A 1 where the sliding portion 34 slides in the compression chamber 31 to the uppermost position B 1. The inner casing 3a is formed at a position near the lowermost position A1 in the movement range of the inner casing 3a so as to penetrate the compression chamber 31 from the outer peripheral wall of the inner casing 3a. By providing the air intake port 4 at a position near the lowermost position A1 of the sliding portion 34 in the compression chamber 31, the sliding portion 34 exceeds the air intake port 4 from the lowermost position A1. However, when sliding from the position beyond the position to the uppermost position B 1, the air in the compression chamber 31 can be compressed without escaping to the air intake port 4. Therefore, by providing the air intake port 4 at the above position, air does not flow from the compression chamber 31 to the air intake port 4 when the air is compressed by sliding the sliding portion 34 in the compression chamber 31. This eliminates the need for a non-return valve, thereby simplifying and manufacturing at low cost.

On the other hand, when the air intake port 4 is provided at a position near the lowermost position A1 of the sliding portion 34 in the compression chamber 31, the sliding portion 34 is moved from the uppermost position B1 to the lowermost position A1. The air does not enter the compression chamber 31 until it reaches the air intake port 4 when sliding toward, so that the compression chamber 31 is in a negative pressure state.

Therefore, compared with the case where the air intake port 4 is provided at a position near the uppermost position B1 in the moving range of the sliding portion 34 to prevent a negative pressure state, for example, the sliding portion 3 4 Increases the resistance when sliding from the uppermost position B1 to the lowermost position A1.

Therefore, when the air intake port 4 is provided at a position near the lowermost position A 1 of the sliding portion 34 in the compression chamber 31 as described above, the piston 9 is not held by the cam 9, A coil panel for urging the piston 33 for urging the rod 33 in the direction from the uppermost position B1 to the lowermost position A1 is provided, and the biasing force of the coil panel slides the biston rod 33. When the moving part 34 is slid from the uppermost position B1 to the lowermost position A1, a coil panel having a biasing force large enough to slide against the negative pressure of the compression chamber 31 is used. Need to be used.

If a coil spring having such a large urging force is used, when the sliding portion 34 slides from the lowermost position A1 to the uppermost position B1, it slides against the urging force of the coil panel. And the rotational resistance of the hub body 201 with respect to the axle 101 increases. I will. Therefore, when the air intake port 4 is provided at a position near the lowermost position A 1 of the sliding portion 34 in the compression chamber 31, a coil spring for biasing the piston rod is not provided as in this embodiment. Therefore, it is preferable to use a positive cam in which the biston member 32 is held by the cam 9 because the rotation resistance of the hub body 201 with respect to the axle 101 can be reduced to enable smooth rotation.

Note that the position of the air intake port 4 is not limited to the form provided at the above position, and may be provided at a position near the uppermost position B1 in the moving range of the sliding portion 34, for example. However, in this case, a check valve must be provided, which increases the number of manufacturing steps and increases the cost. Therefore, it is preferable to provide the air intake port 4 at a position near the lowermost position A1 in the moving range of the sliding portion 34 as in the above-described embodiment, since it can be simplified and can be manufactured at low cost.

In the present embodiment, the waterproof mechanism of the compressed air generation unit 1 includes a first ventilation path 51, a right axle clearance ventilation path 52 as a second ventilation path following the first ventilation path 51, and a right axle clearance ventilation. A third ventilation path 54 following the path 52 and a sealing member 55 are provided.

The first ventilation path 51 communicates with the air intake port 4 and the partitioned space 1 1 1 of the hub body 102 so that the air can be ventilated, and allows the air in the partitioned space 1 1 1 to flow from the partitioned space 1 1 1. Guide to air intake 4. The first ventilation path 51 in this embodiment is formed of a guide groove formed in the inner peripheral wall of the outer casing 3b from the air intake port 4 to the partitioned space portion 11 of the hub body 102.

As shown in FIGS. 4 and 5, the right axle gap ventilation passage 52 is formed on the inner peripheral surface of the axle hole 102 e of the right support portion 102 b of the hub body 102 and the axle hole 102 e. From the axle clearance 5 2a between the axle 101 and the axle 101, the ball 1 0 1b of the axle 101 and the steel ball 10 0 disposed between the steel ball receiving portion 102 d It is composed of a space passage formed in the right support part 102b extending through the steel ball gap 52b between the elements 107 and 107. In this embodiment, a positioning member 114 is provided in the axle hole 102 e, and an axle gap 52 a is formed between the inner peripheral surface of the axle hole 102 e and the positioning member 111. 4 and the outer circumference.

As shown in FIG. 4, the third ventilation passage 54 connects the right axle clearance ventilation passage 52 to the outside between the inner peripheral surface of the tubular body 56 and the outer periphery of the axle 101. So that they are compartmentalized You.

More specifically, the tubular body 56 is made of a synthetic resin, and has a locking projection 56 a for attaching to the right support portion 102 b on the outer periphery on the left end side as shown in FIG. It is provided.

The cylindrical body 56 is supported on the right side of the hub 102 by fitting the locking projections 56 a into the locking grooves 102 h provided on the right support portion 102 b. Attached to part 102d.

A waterproof packing 1 16 is provided between the outer periphery of the cylindrical body 56 and the right support portion 102 b. The waterproof packing 1 16 allows the waterproof packing 1 16 to be connected to the outer periphery of the cylindrical body 56. Water is prevented from entering the right axle gap ventilation channel 52 from between the right support portion 102 b.

In this manner, the axle 101 is inserted through the tubular body 56 attached to the right support portion 102 b of the hub body 102, and the inner peripheral surface of the tubular body 56 is Between the axle 101, a third ventilation path 54 that connects the right axle gap ventilation path 52 to the outside is formed all around the outer periphery of the axle 101. In this embodiment, on the inner peripheral side of the cylindrical body 56, a ball pusher 101b of the axle 101 is disposed, and the third ventilation path 54 is provided with a ball pusher 101b. It is formed between the outer periphery and the inner peripheral surface of the cylindrical body 56.

In addition, the third ventilation path 54 is formed on the outside (the right side in FIG. 4) formed by making the inner peripheral surface of the cylindrical body 56 tapered so that the diameter gradually increases toward the outside on the right side. The taper portion 59a and the inside of the taper portion 59a (left side in Fig. 4), the radial direction formed by the taper portion 59a, and the closing portion 59b extending radially inward from the taper portion 59a A narrow diameter narrow portion 59c having a width L1 is provided. In this embodiment, the taper angle P of the taper portion 59a is set to 10 °.

In the third ventilation path 54, a large-diameter narrow portion 61 formed by the inner peripheral surface of the cylindrical body 56 and the covering member 60 is provided on the right side of the small-diameter narrow portion 59c. Provided. The covering member 60 is formed of a disk-shaped member having an outer diameter larger than the diameter of the small-diameter narrow portion 59c, and is disposed inside the tapered portion 59a of the cylindrical body 56 in the radial direction. So that it is fixed to the axle 101.

Thereby, between the outer periphery of the covering member 60 and the tapered portion 59 a of the cylindrical body 56, The width L2 in the radial direction is substantially the same as the width L1 of the small-diameter narrow portion 59c, and the large-diameter narrow portion 61 having a larger diameter than the small-diameter narrow portion 59c is formed. Therefore, the third air passage 54 of this embodiment includes two narrow portions 59c and 61 having different diameters, and the meandering air is formed by these two narrow portions 59c and 61. It is formed so that it can flow. In this embodiment, the width L1 of the small-diameter narrow portion 59c and the width L2 of the large-diameter narrow portion 61 are set to about 0.5 mm.

The sealing member 55 is for sealing the left axle gap ventilation passage 53 formed in the haptic body 102 from the outside. The left axle gap air passage 53 is formed with the axle hole 102 e of the left support portion 102 c of the hub body 102 as shown in FIG. 2, similarly to the right axle gap air passage 52 described above. From the axle gap 53 between the axle 101 passing through the axle hole 102 e and the axle 101, push the axle 101 to the ball 1101b, 101b and the steel ball receiving part 102d. The steel balls 107 and 107 are disposed between the steel balls 107 and 107, and are formed of a space passage extending through the steel ball gap 53b between the steel balls 107.

The seal member 55 is made of a synthetic rubber ring as shown in FIG. The mounting piece 55 a provided on the inner peripheral side of the sealing member 55 and the mounting groove 101 c provided in the ball pusher 101 b are fitted into the sealing member 55, so that the sealing member 55 becomes a ball. Push attached to 101b. Further, the outer periphery of the seal member 55 attached to the pusher 101b in this manner is in contact with the left support portion 102c over the entire periphery. Thus, the sealing member 55 seals the left axle gap ventilation path 53 from the outside in a substantially sealed state, so that water does not enter the left axle gap ventilation path 53 from the outside.

Next, the compressed air supply path 2 for the pneumatic tire of the automatic air supply mechanism will be described. The compressed air supply path 2 for the pneumatic tire is formed between the compressed air generator 1 and the pneumatic tire 103, and as shown in FIGS. The air supply tube 13b connected to the pneumatic tire 103, the air supply tube 13a connected to the air holding tube 103b of the pneumatic tire 103, the air supply tube 13b connected to the air And a connection supply path 21a connected to the supply path 13a. The communication supply path 13 b is defined by a partition wall 7 above the compression chamber 31 in FIG. 2 in the inner casing 3 a. This partition wall 7 has through holes 7 1 Through the through hole 71, the compression chamber 31 and the communication supply path 13b are communicatively connected.

The through hole 71 is provided with a check valve 40. The check valve 40 is a check means for preventing air from flowing back from the compressed air supply passage 2 for the pneumatic tire to the compression chamber 31. In this embodiment, the check valve 40 is used to supply compressed air for the pneumatic tire. It is composed of ball pulp 40 provided on the road 2 side. The ball valve 40 is a pole 41, a synthetic rubber ring-shaped ball receiving packing 42 for receiving the ball 41, and an urging member for urging the ball 41 toward the ball receiving packing 42. Ball biasing coil panel 43. The ball 41 closes the through hole 71 from the side of the compressed air supply path 2 for the air tire by the biasing force of the ball biasing coil spring 43.

The connection supply passage 2 la is formed inside the cylindrical connection pipe 21. The base end of the connecting pipe 21 is attached so as to enter the communication supply path 13b of the inner casing 3a. Thereby, the base end side of the connection supply path 21a is connected to the communication supply path 13b so as to be able to ventilate.

As shown in FIG. 3, the connecting pipe 21 is provided with a pressure adjusting section 12 for adjusting the air pressure of the compressed air supply path 2 for a pneumatic tire. The pressure adjusting section 12 allows the compressed air supply path 2 for the air tire to function as a constant pressure holding section that holds air at a constant pressure.

The pressure adjusting section 12 of this embodiment includes a cylindrical section 12 a having an exhaust port 11 a, a valve body 12 b for opening and closing the exhaust port 11 a, and a constant for energizing the valve body 12 b. A constant-pressure-valve urging coil panel 12c as a pressure-valve urging member is provided.

The cylindrical portion 12a is attached to the side wall of the connecting pipe 21 so that the exhaust port 11a of the cylindrical portion 12a allows the connecting supply passage 21a to communicate with the outside, and the connecting supply passage 2 : The compressed air of L can be discharged to the outside from the exhaust port 11a.

The constant-pressure valve urging coil panel 12c constantly urges the valve body 12b toward the connection supply path 21a. And, by this bias, the valve body 12b blocks the exhaust port 11a.

The pressure adjusting section 12 is not limited to the one provided in the connecting supply path 21a, What is necessary is just to provide in the compressed air supply path 2 for pneumatic tires. Further, the pressure adjusting section 12 can be changed as appropriate, for example, by being constituted by a ball valve.

The pneumatic tire delivery supply channel 13a is formed inside a connection pipe 14 having elasticity. The proximal end of the connecting pipe 14 is attached to the distal end of the connecting pipe 21 so as to be pushed into the outer periphery of the connecting pipe 21. As a result, the connection supply path 21a and the pneumatic tire delivery supply path 13a are connected in a permeable manner. Further, a pneumatic tire connection portion 16 is provided at the distal end side of the connection pipe 14 on the opposite side attached to the connecting pipe 21 so as to be detachably connected to the pneumatic tire 103 as shown in FIG. I have. The pneumatic tire connection portion 16 includes a knocker 16a and a nut locking piece 16b that is locked to a valve locking nut 106d of the air holding tube 103b. Then, while the packing 16a is in contact with the end face of the pulp 106, the nut locking piece 16b is locked to the valve locking nut 106d. Thus, the pneumatic tire delivery supply path 13a is connected to the air holding tube 103b so as to be able to ventilate.

Next, the operation of the automatic air supply mechanism for the pneumatic tire of the bicycle according to this embodiment will be described. The sliding part 3 4 of the compressed air generating part 1 is located at the lowest position A 1 in the compression chamber 31, and the sliding part 34 of the second compressed air generating part 1 b is the highest in the compression chamber 31. From the state shown in FIGS. 2 and 3 arranged at the position B1, the air tire 103 is rotated with respect to the axle 101 by, for example, running a bicycle. As a result, the haptic body 102 rotates upon its rotation, and together with the knob body 102, the roller 37 of the piston member 32 of the compressed air generating unit 1 radiates the diameter of the cam surface 91 a of the cam 9. Drive from small part A to large diameter part B.

During the travel, the piston member 32 starts to be pressed by the cam 9, and the piston member 32

The roller 37 of 32 is pressed until it reaches the large diameter portion B of the cam 9. This pressing causes the sliding portion 34 to move in the compression chamber 31 along the inner wall surface of the compression chamber 31 to the lowest position.

Slide the compression chamber 31 內 from A1 to the uppermost position B1.

When the sliding portion 34 slides from the lowermost position A1 to the uppermost position B1, the air in the compression chamber 31 is compressed to a certain compression ratio.

When the sliding portion 34 slides, for example, the end of the piston rod 33 is moved by the force of the cam 9. When the contact surface is maintained by pressing against the spring surface 91a by the coil panel for urging, the piston rod 33 must be slid against the urging force, and However, in this embodiment, the piston rod 33 is held on the cam 9 via the holding shaft 36, and the biasing coil is used in this embodiment. Since no spring is provided, the piston rod 33 can slide smoothly with a small force. Thereby, resistance when rotating the hap body 102 can be reduced. Also, for example, when the piston 9 has a large tangential force of the cam 9 received by the piston 9 from the cam 9, the piston rod 33 presses the rod guide member 38 of the compression chamber 31 to one side. Therefore, sliding becomes difficult, and the rod guide member 38 is worn. As a result, the piston rod 33 is inclined with respect to the axial direction of the compression chamber 31, and the sliding becomes more difficult. However, in this embodiment, the force of the component perpendicular to the axial direction of the compression chamber 31 received by the piston rod 33 from the cam 9 can be reduced as much as possible, and the abrasion of the rod guide member 38 can be reduced. Therefore, even when used repeatedly, the piston rod 33 can always be pressed in the axial direction of the compression chamber 31 and can slide smoothly.

When the roller 37 of the piston member 32 of the compressed air generator 1 comes to the large diameter portion B of the cam surface 91a, the piston port of the compressed air generator 1 as shown in FIGS. The sliding part 34 of the pad 33 moves to the uppermost position B1. During the movement, the air in the compression chamber 31 of the compressed air generation unit 1 is compressed.

In this way, when the air in the compression chamber 31 of the compressed air generator 1 is compressed, the ball 41 of the check ring 40 is pressed from the compression chamber 31 by the air pressure of the compressed air. Is done. At this time, the ball 41 of the check ring 40 receives the pressing force of the air pressure in the compressed air supply passage 2 for the pneumatic tire and the urging force of the ball urging coil panel 43. Therefore, when the pressing force from the compressed air supply path 2 for the air tire is smaller than the pressure from the inside of the compression chamber 31, the ball 41 of the check ring 40 is connected to the compressed air supply path for the pneumatic tire. Move to the 2 side to open through hole 71. As a result, the compressed air compressed in the compression chamber 31 is sent from the through hole 71 to the compressed air supply path 2 for the pneumatic tire.

The ball 41 of the check ring 40 closes the through hole 71 when the sliding portion 34 moves from the uppermost position B1 to the lowermost position A1 in the compression chamber 31. This Therefore, it is possible to prevent the air in the compressed air supply path 2 for the pneumatic tire from returning to the compression chamber 31. When the compressed air supply passage 2 for the pneumatic tires containing the compressed air exceeds a predetermined air pressure, the air pressure in the compressed air supply passage 2 for the pneumatic tires causes the valve body 1 2b of the pressure adjusting section 12 to be biased to a constant pressure valve. Is pressed against the urging force of the coil panel 12c to open the exhaust port 11a. Thus, the compressed air in the compressed air supply path 2 for the pneumatic tire is discharged to the outside from the exhaust port 11a. When the air pressure in the pneumatic tire compressed air supply passage 2 reaches a predetermined air pressure, the valve body 12b closes the exhaust port 11a by the urging force of the constant-pressure valve urging coil panel 12c.

The compressed air held at a predetermined air pressure in the compressed air supply passage 2 for the pneumatic tire enters the valve 106 of the air holding tube 103b as shown in FIG. 8, and passes through the valve hole 106b. The blocking check valve 106c is pressed from the inside of the valve 106. Then, the pressure applied to the check ring 106c from the inside by the air pressure in the compressed air supply passage 2 for the pneumatic tire increases the elastic force of the check ring 106c and the air holding tube 103b. If the pressure is greater than the sum of the pressure applied to the check valve 106 c due to the air pressure inside the valve, the check valve 106 c blocking the valve hole 106 b is pushed from the inside and the air is released. Flows from the compressed air supply path 2 for the pneumatic tire into the air holding tube 103b.

Then, the back pressure is prevented by the pressing force applied to the check valve 106 c by the air pressure of the compressed air supply path 2 for the air tire, the elastic force of the check valve 106 c and the air pressure in the air holding tube 103 b. When the sum of the pressure applied to the valve 106 c and the pressure becomes equal, the flow of air into the air holding tube 103 b stops.

Thereafter, as time passes, the air pressure of the air holding tube 103 b decreases, and the elastic force of the check valve 106 c and the air pressure in the air holding tube 103 b act on the check valve 106 c. When the sum of the pressure and the pressure becomes smaller than the pressure applied to the check valve 106c due to the air pressure of the compressed air supply path 2 for the pneumatic tire, the check valve closing the valve hole 106b again 106c is pushed from the inside by the air pressure of the compressed air supply passage 2 for the pneumatic tire, and the air of the compressed air supply passage 2 for the pneumatic tire flows into the air holding tube 103b. As a result, the air pressure of the air holding tube 103b is always kept constant. If the connecting pipe 14 comes off from the connecting pipe 21 or the pneumatic tire 103, or if the connecting pipe 14 is damaged, the pneumatic tire 103 is removed by the valve 106 of the pneumatic tire 103. Air pressure can be maintained as it is. Note that the cam 9 is fixed to the axle 101 and does not change its position, and the biston rod 33 changes its position by running on the cam surface 91a. However, in FIGS. This is shown by changing the position of the cam surface 91 a without changing the position of the piston rod 33. The same applies to FIGS. 12 and 13 described later.

Further, when the haptic body 102 rotates, the biston member 32 is pulled by the cam 9 because the holding shaft 36 is held by the piston holding portion 92 of the cam 9, and the roller 37 becomes the cam 9. The cam surface 91a is kept in contact with the cam surface 91a, and travels from the large diameter portion B to the small diameter portion A of the cam surface 91a. At that time, the pulling of the piston member 32 by the cam 9 is performed from the left side of the piston opening 33, which is separated from the axial extension line q of the piston rod 33 by a distance. However, when the sliding portion 34 slides from the uppermost position B1 to the lowermost position A1, since the air is not compressed, the sliding from the lowermost position A1 to the uppermost position B1 is performed. The sliding of the part 34 can be performed with a smaller force than in the case of compressing air, and the biston rod 33 can be pulled smoothly. As the roller 37 travels, the sliding portion 34 moves in the compression chamber 31 from the uppermost position B1 to the lowermost position A1, and returns to the state shown in FIGS.

Also, when the sliding portion 34 of the piston rod 33 passes through the air intake port 4 when sliding from the uppermost position B1 to the lowermost position A1, the sliding portion 34 from the air intake port 4 enters the compression chamber 31. The air in the partitioned space portion 111 of the hub body 102 is taken in through the first ventilation path 51.

When the air in the compartment 1 1 1 enters the first ventilation channel 51, the compartment 1 1 1 also has a right axle gap ventilation channel 5 2 as a second ventilation channel 52, and a third ventilation channel. External air is sucked in through the passage 54.

At this time, since the third ventilation path 54 has a tapered portion 59a, as shown in FIG. 4, the water Ml entering the tapered portion 59a is centrifuged along with the rotation of the hub body. It can be moved to the larger diameter side of the tapered portion 59 a by force and can be taken out of the third ventilation path 54. In addition, the water Ml entering the tapered portion 59a is removed by its own weight. Can be transmitted out of the third ventilation path 54. In addition, since the third ventilation path 54 has two narrow portions 59c and 61 having different diameters, water Ml such as rainwater is

(3) It is possible to make it difficult to pass through the ventilation path (54), and it is possible to make it difficult for water Ml such as rainwater to enter the right axle clearance ventilation path (52) from the third ventilation path (54).

Also, even if water M 1 such as rainwater enters the right axle gap airway 52 from the third airway 54, the steel ball 107 · Since the Darris is arranged together with 107, it is difficult for the water Ml to pass through the right axle gap ventilation path 52, and the compartment space 1 1 of the hub body 102 from the right axle gap ventilation path 52 You can make it difficult to enter 1. Therefore, only the air enters the partitioned space portion 111 without water Ml entering through the second ventilation path 52 and the third ventilation path 54, and as a result, the compression chamber 31 Only the air in the compartment space 111 is sucked from the air intake port 4 through the one air passage 51, and it is possible to prevent water such as rainwater from entering along with the air.

Hereinafter, similarly, as the hub body 102 rotates, the sliding portion 3 4 of the biston member 32 slides in the compression chamber 31, generating compressed air in the compression chamber 31 and external air. The compressed air generated is supplied to the pneumatic tire 103 as appropriate.

To remove the piston member 32 from the cam 9, pull the holding shaft 36 to the right side while attached to the piston rod 33, and pull it out of the shaft fitting hole 9 2b. Thereby, the piston member 32 can be detached from the cam 9, and the inner casing 3 a or the piston rod 33 constituting the compression chamber 31 can be easily detached from the hub body 102. Therefore, parts can be easily replaced by disassembly or the like, and maintenance can be easily performed.

Note that, in the first embodiment, the left axle gap ventilation passage 53 is shut off from the outside by the seal member 55, so that the second axle clearance ventilation passage 52 is constituted by the right axle clearance ventilation passage 52. Although the third ventilation path 54 for communicating the path 52 with the outside is provided, the invention is not limited to this form and can be changed as appropriate. For example, without providing the sealing member 55, the second ventilation path is composed of the right axle clearance ventilation path 52 and the left axle clearance ventilation path 53, and the right axle clearance ventilation path 52 and the left axle clearance ventilation path 5 are provided. A third ventilation path 54 may be provided for each of the three. However, if the third ventilation path 54 as in the above embodiment is provided on both the left and right sides of the hub body 102, the cost becomes high, so the third ventilation path 54 Is provided only on one of the left and right sides of the haptic body 102 and the sealing member 55 is provided on the other side of the hub body 102 on the right or left side. This is preferable in that water can hardly enter the 54 and can be manufactured at low cost.

In the first embodiment, the third air passage 54 is formed by the cylindrical body 56 fixed to the hub 102 and the covering member 60 fixed to the axle 101. Yes Force Not limited to this form, but can be changed as appropriate. For example, the third ventilation path 54 may be formed only by the tubular body 56 fixed to the hub body 102.

Further, in the first embodiment, the second air passage is constituted by the right axle gap air passage 52 formed in the hub body 102, but the support portions 102 b and 102 c A through-hole is provided which penetrates from the compartment space portion 1 1 1 to the outside, and this through-hole is replaced with the right axle gap air passage 52 or forms a second air passage together with the right axle gap air passage 52. It can be changed as needed. More specifically, for example, the support portions 102b and 1◦2c are rotatably supported by the haptic body 102 via shield bearings, and the support portions 102b and 102c A through-hole penetrating from the demarcated space portion 111 to the outside is provided in a radially outer portion of the sinored bearing, and this through-hole serves as a second air passage.

Further, in the first embodiment, the waterproof mechanism is constituted by the first ventilation path 51, the second ventilation path 52, the third ventilation path 54, and the sealing member 55. A perforated hole formed from the inner peripheral surface to the outer peripheral surface of the outer casing 3b so as to allow the air intake port 4 of the inner casing 3b to communicate with the outer portion; It is also possible to use a structure provided with a film that allows gas to pass through, so that the film can block rainwater or other water from the outside of the outer casing 3b to the perforated hole and allow only air to pass through.

In the first embodiment, the taper angle P of the tapered portion 59 a of the cylindrical body 56 is

The force s set at 10 ° is not limited to this, and can be changed as appropriate. Preferably, the taper angle P is in the range of about 5 ° to about 15 °. If the angle is smaller than about 5 °, the centrifugal force accompanying rotation of the hub body makes it difficult for water to move to the larger diameter, and makes it difficult to expel it to the outside. In addition, it is difficult for water to be transmitted to the larger diameter by its own weight and to be driven out. On the other hand, if the angle is larger than about 15 °, falling rainwater will easily enter. In the first embodiment, the width L1 of the small-diameter narrow portion 59c of the third ventilation path 54 and the width L2 of the large-diameter narrow portion 61 are set to about 0.5 mm. Can be changed. Preferably, it is in the range of about 0.1! 11111 to about 1.5 mm. When it is smaller than about 0.1 mm, the suction pressure of the air accompanying the sliding of the piston rod 33 in the compression chamber 31 causes a negative pressure in the partitioned space 1 1 1 of the hub body 102, At the same time, the risk of inhaling water increases. On the other hand, if it is larger than about 1.5 mm, water will easily enter. As described above, the third ventilation path 54 of the present embodiment is defined between the inner peripheral surface of the cylindrical body 56 fixed to the hub body 102 and the outer periphery of the axle 101. I have. The third ventilation path 54 has a small-diameter narrow portion 59 formed by reducing the diameter of a part of the inner periphery of the cylindrical body 56 so as to reduce the radial width L1. c. Further, the third ventilation path 54 has a radial width L 2 which is fixed to the axle main body 102 d by the covering member 60 arranged on the inner peripheral side of the tubular body 56. A large-diameter narrow portion 61 is provided, which is approximately the same as the small-diameter narrow portion 59c and has a larger diameter than the small-diameter narrow portion 59c. In this way, the third ventilation path 54 includes at least two narrow portions 59c, 61 having different diameters, and the air meanders by these two narrow portions 59c, 61. It is formed so that it can flow. Also, the radial widths L l and L 2 of these two narrow portions 59 c and 61 are approximately 0.1mn! The range is ~ 1.5 mm. Next, a second embodiment will be described. FIG. 9 is a side view of a wheel of a wheelchair having an automatic air supply mechanism for a pneumatic tire of a wheelchair according to the second embodiment, and FIG. 10 is an enlarged sectional explanatory view taken along line X—X of FIG.

The automatic air supply mechanism of the second embodiment is provided on each of a left wheel 500 and a right wheel (not shown) of a wheelchair, and serves as an automatic air supply mechanism for a pneumatic tire of a wheelchair. The left wheel 500 and the right wheel of the wheelchair having the automatic air supply mechanism for the pneumatic tire of the wheelchair have the same configuration. Hereinafter, the left wheel 500 will be described, and the description of the right wheel will be omitted.

The left wheel 500 has an axle 101 and a wheel body 110. The axle 101 has the same configuration as that of the first embodiment.

As shown in FIG. 9, the wheel main body 110 includes a hub body 102, a pneumatic tire 103, and an automatic air supply mechanism. The hub body 102 and the pneumatic tire 103 are The configuration is the same as that of the first embodiment.

The automatic air supply mechanism includes a plurality of compressed air generators 1a and 1b for generating compressed air, and a guide for supplying the compressed air generated by the compressed air generators 1a and 1b to the pneumatic tire. A compressed air supply path 2a, 2b for a pneumatic tire is provided.

In this embodiment, the compressed air generating unit includes a first compressed air generating unit 1a that appears on the upper side of FIGS. 10 and 11, and a second compressed air generating unit 1b that appears on the lower side of the figure. It is composed of two.

The first compressed air generator 1a and the second compressed air generator 1b have the same configuration as the compressed air generator 1 of the first embodiment. Further, the first compressed air generation section 1a and the second compressed air generation section 1b are arranged at positions spaced apart from each other by 180 ° in the circumferential direction of the cam 9. More specifically, the piston holding portion 92 of the cam 9 in the second embodiment has a first shaft fitting hole formed on a concentric circle centered on the axis of the cam body receiving hole 92 a. A second shaft fitting hole 92c is formed at a position spaced 180 ° in the circumferential direction from the first shaft fitting hole 92b and the first shaft fitting hole 92b. Then, the projection 36a of the holding shaft 36 of the first compressed air generation unit 1a is removably fitted into the first shaft fitting hole 92b, and the second compressed air generation unit 1b is held. The protrusion 36a of the shaft 36 is removably fitted into the second shaft fitting hole 92c so that the first compressed air generator 1a and the second compressed air generator 1b It is arranged at a position 180 degrees apart in the circumferential direction of the cam 9 and is held by the cam 9.

Further, by arranging the first compressed air generator 1a and the second compressed air generator 1b as described above, as shown in FIGS. 10 and 11, the first compressed air generator 1a The roller 37 of the a member 32 of a contacts the roller 37 of the cam surface 91 a with the small diameter portion A of the cam surface 91, and the sliding portion 34 of the biston opening 33 moves the compression chamber 31 to the lowest position A1. At this time, the roller 37 of the piston member 32 of the second compressed air generator 1 b abuts against the large diameter portion B of the cam surface 91 a, and the sliding part 34 of the biston rod 33 comes to the top of the compression chamber 31. Come to position B1.

Next, the compressed air supply passages 2a and 2b for pneumatic tires will be described. The compressed air supply path for the pneumatic tire according to the second embodiment includes the first compressed air generator 1a and the pneumatic tire.

The first compressed air supply passage for the first pneumatic tire formed between the second pneumatic tire and the pneumatic tire formed between the second compressed air generator and the pneumatic tire. And supply channel 2b.

The compressed air supply passage 2a for the first pneumatic tire has the same configuration as the compressed air supply passage 2 for the pneumatic tire of the first embodiment, and the compression chamber 3 1 of the first compressed air generation unit 1a. Connection supply path 13b, pneumatic tire delivery supply path 13a, and connection supply path 13b and pneumatic tire delivery supply path 13a 1 a and.

The compressed air supply path 2b for the second pneumatic tire is similar to the compressed air supply path 2a for the first pneumatic tire, and the supply path 13b for communication, the supply path for pneumatic tire delivery, and the supply supply for connection. And road. However, the compressed air supply path 2b for the second pneumatic tire is connected to the supply path 2 1a for the compressed air supply path 2a for the first pneumatic tire via the connection path 22a. a, and connected to the pneumatic tire delivery supply path 13a of the first pneumatic tire compressed air supply path 2a and the pneumatic tire 103 via its connection supply path 21a. ing. Therefore, the supply path 21a for connection of the compressed air supply path 2a for the first pneumatic tire and the supply path 13a for delivery of the pneumatic tire of this embodiment are connected to the compressed air supply path 2b for the second pneumatic tire. The air supply line and the air supply line are also used.

Next, the operation of the automatic air supply mechanism for a pneumatic tire of a wheelchair according to the second embodiment will be described. The sliding part 3 4 of the first compressed air generator 1 a is located at the lowest position A 1 in the compression chamber 3 1, and the sliding part 3 4 of the second compressed air generator 1 b is the compression chamber 3 1 The pneumatic tire 103 is rotated with respect to the axle 101 by, for example, pushing a wheelchair to run from the state shown in FIGS. As a result, the hap body 102 rotates during the rotation, and together with the hub body 102, the roller 37 of the biston member 32 of the first compressed air generating section 1 a moves the cam surface 91 a of the cam 9. From the small-diameter portion A to the large-diameter portion B, and the piston member 32 of the second compressed air generation section 1 b 3 roller 3 7 force The cam surface 9 of the cam 9 from the large-diameter section B of 1 a Drive toward small diameter section A.

During this travel, the piston member 32 of the first compressed air generating portion 1a starts to be pressed by the cam 9, and is pressed until the roller 37 of the piston member 32 reaches the large diameter portion B of the cam 9. Then, by this pressing, as shown in FIGS. 12 and 13, the sliding portion 3 4 slides inside the compression chamber 31 along the inner wall surface of the compression chamber 31 from the lowermost position A1 to the uppermost position B1. On the other hand, the sliding portion 34 of the piston rod 33 of the second compressed air generating portion 1b is pulled by the cam 9, and the inside of the compression chamber 31 is moved from the uppermost position B1 along the inner wall surface of the compression chamber 31. Slide in the compression chamber 31 toward the lowermost position A1. '.

When sliding from the lowermost position A1 to the uppermost position B1 of the driving portion 34 of the piston hole 33 of the first compressed air generating portion 1a, the air in the compression chamber 31 is constant. It is compressed to a compression ratio of.

The compressed air generated by the first compressed air generator 1a is supplied from the communication supply path 13b to the connection supply path 21a, and further to the connection supply path, as in the first embodiment. From 21a, the tire passes through the supply path 13a for delivering the pneumatic tire and enters the pneumatic tire 103 as appropriate. On the other hand, the roller 37 of the biston member 32 of the second compressed air generator 1b is connected to the roller 37 of the biston member 32 of the first compressed air generator 1a. When it comes to the large diameter part B, it comes to the small diameter part A of the cam surface 91a, and as shown in Figs. 12 and 13, the sliding part of the piston rod 33 of the second compressed air generation part 1b 3 4 moves to the lowest position A 1.

Even when the sliding part 34 of the piston rod 33 of the second compressed air generating part 1 b moves from the uppermost position B 1 to the lowermost position A 1, the holding shaft 36 of the biston member 32 is moved by the cam 9. Since the piston member 32 is held by the piston holding portion 92 of the piston rod 33, the piston member 32 is located on the left side of the piston rod 33 at a certain distance in the axial direction from the axial extension line q of the piston rod 33. From the piston 9 of the cam 9. However, when the sliding portion 34 slides from the uppermost position B1 to the lowermost position A1, the air is not compressed, so that the sliding portion from the lowermost position A1 to the uppermost position B1 described above. The sliding of 34 can be performed with a smaller force as compared with the case of compressing the air, and the biston opening 33 can be pulled smoothly.

Also, when the sliding part 34 of the piston rod 33 of the second compressed air generating part 1b passes through the air intake port 4, the air flows from the air intake port 4 to the compression chamber 31 to the first ventilation path 51. The air in the partitioned space portion 111 of the hub body 102 is taken in through the air. In addition, the second ventilation passage 52 and the third ventilation passage 54 prevent water from entering the demarcated space portion 111 of the hub body 102. Can be stopped and only air can enter.

When the hub body 102 further rotates from the state shown in FIG. 12 and FIG. 13, the piston 9 32 of the first compressed air generator 1 a is pulled by the cam 9, and the roller 37 becomes the cam surface 9. 1a travels from the large-diameter portion B to the small-diameter portion A, whereby the sliding portion 34 moves from the uppermost position B1 to the lowermost position A1. On the other hand, the second compressed air generation section 1 b starts to move the roller 37 of the piston member 32 from the small diameter portion A of the cam surface 91 a toward the large diameter portion B, 7 starts to be pressed by the cam surface 91. In addition, the sliding portion 34 moves the compression chamber 31 from the lowermost position A1 to the uppermost position B1 by this traveling (the state shown in FIGS. 11 and 12). At the time of the movement, the air in the compression chamber 31 is compressed to a constant compression ratio.

The air compressed by the second compressed air generating section 1b passes through the connection path 22b from the communication supply path 13b of the compressed air supply path 2b for the second pneumatic tire, and passes through the connection path 22a for the first pneumatic tire. The compressed air supply path 2a enters the connection supply path 21a. Further, the compressed air entering the connection supply passage 21a of the first compressed air flow passage 1b is supplied to the pneumatic tire delivery supply passage 13a in the same manner as in the case of the first compressed air generation unit 1a described above. Go through a and into the pneumatic tire 103.

Hereinafter, similarly, with the rotation of the hub body 102, the first compressed air generator 1a and the second compressed air generator 1b alternately generate compressed air alternately, and the compressed air is appropriately applied. Supplied to Yi tires 103.

By performing as described above, each time the wheel body rotates, the first compressed air generation unit 1a and the second compressed air generation unit 1b compress the air in turn, and the air tire 10 3 Can be supplied. Thereby, compressed air can be generated with almost the same force as in the case of providing one compressed air generation unit 1 as in the first embodiment, and one compressed air generation unit 1 is provided as in the first embodiment. Twice the amount of compressed air can be generated as compared to the case where the above method is used. Therefore, in a normal running of the wheelchair, a sufficient amount of air can be compressed within a short time after the start of running at a stage where the number of rotations of the wheels is low, and the pneumatic tire 103 can be set to a predetermined air pressure. The resistance during traveling can be suppressed. Therefore, it can be made suitable for a wheelchair or the like.

In the second embodiment, the compressed air for the first pneumatic tire is connected via the connection path 22a. The supply path 2a and the compressed air supply path 2b for the second pneumatic tire are connected to form one, for example, the compressed air supply path 2a for the first pneumatic tire and the compressed air supply path for the second pneumatic tire. 2b is formed separately and independently, and the compressed air supply passages 2a and 2b for each pneumatic tire are connected to the pneumatic tire 103, and the compressed air supply passages 2a and 2b for each pneumatic tire are connected. Compressed air may be supplied to the pneumatic tire 103. Next, an automatic air supply mechanism according to a third embodiment will be described with reference to FIGS. The automatic air supply mechanism according to the third embodiment supplies air to the pneumatic tires of the wheels mounted on the bicycle, and supplies air to the saddle portion as another part of the bicycle as a vehicle other than the pneumatic tires, thereby providing seats. It is said to have cushioning properties.

As in the second embodiment, the automatic air supply mechanism of the third embodiment includes two compressed air generation units, a first compressed air generation unit 10a and a second compressed air generation unit 10b. And compressed air supply paths 20 a and 300.

Although the first compressed air generation unit 10a and the second compressed air generation unit 10b seek the same configuration as that of the first embodiment, the first compressed air generation unit 10a and the second The air generator 10a and the second compressed air generator 10b are attached to the front wheels 202 of the bicycle. The front wheel 202 of the bicycle includes an axle 201 and a wheel body, as shown in FIG. 14, similarly to the bicycle wheel in the first embodiment. A haptic body 102 rotatably supported on an axle 201 and a pneumatic tire 103 are provided.

The axle 201 of the third embodiment has a shaft hole 43a as shown in FIG. The shaft hole 43a is formed from the left end of the axle 201 to the left and right from the center in the left-right direction along the axial direction. As a result, the shaft hole 43a force S extends from the outside of the haptic body 102 attached to the axle 201 to the inside of the haptic body 102. Further, the inner part of the shaft hole 43a extended to the inside of the hub body 202 in this way is, as shown in FIG. 17, the shaft hole 43a of the shaft axle 201. Through holes 43b, 43b formed to penetrate the outer periphery communicate with the outer periphery of the axle 201.

The hub body 102 and the pneumatic tire 103 of the wheel main body have substantially the same configuration as that of the first embodiment. The compressed air supply path of the automatic air supply mechanism includes a compressed air supply path for a pneumatic tire 20 a that guides the compressed air generated by the first compressed air generator 10 a to the pneumatic tire 103 and supplies the compressed air. (2) It comprises a compressed air supply passage for other parts 300 for guiding the compressed air generated by the compressed air generating part 100b to the saddle part 140 provided in the bicycle and supplying it. The pneumatic tire compressed air supply path 20a has the same configuration as the pneumatic tire compressed air supply path 2 of the first embodiment.

The other part of the compressed air supply passage 300 is provided with a communication supply passage 13b (shown in FIG. 15) communicating with the compression chamber 31 of the second compressed air generation part 10b, and a saddle part 1 of the bicycle. The saddle delivery supply path 301 connected to the 40 air holding section 15 1 (shown in Fig. 18), the communication supply path 13 b, and the saddle delivery supply path 301 were connected. And a supply path 302 for connection. '' As shown in FIG. 15, the connection supply passage 302 is a connection passage connecting the shaft hole 43 a of the axle 201 and the shaft hole 43 a with the communication supply passage 13 b. 3 0 3 is provided. This connecting passage 303 is formed inside the connecting pipe 313. The connection pipe 3 13 is connected to a shaft hole 43 a of the axle 201 via a rotary connection member 45. As shown in FIGS. 16 and 17, the rotary connection member 45 includes two rings 45 a and 45 a made of synthetic rubber, and a ring-shaped rotor 45 b.

The two rings 45a, 45a are fixed to outer peripheries on both the left and right sides of the through holes 43b, 43b in the axle 201.

A pipe connector 45 c for detachably connecting the connecting pipe 3 13 is provided on the outer peripheral side of the rotor 45 b. The pipe connector 45c is formed of a tubular member, and has a pipe connection hole 45d on the inner peripheral side.

On the inner peripheral side of the rotor 45b, an air reservoir 45e formed over the entire periphery is provided as shown in FIG. Further, the air reservoir 45 e is formed through a hole 45 f formed so as to communicate with the pipe connection hole 45 d of the pipe connector 45 c and the air reservoir 45 e. Are in communication. The air reservoir 45 e, the pipe connection hole 45 d, and the drilled hole 45 f are connected to the connection path 303 of the connection pipe 3 13 and the shaft hole 4

A connection hole 45i is formed to connect 3a with the air-permeable member.

Rings 45a and 45a are rotatably received on both left and right sides of the air reservoir 45e. A ring receiver 45 g, 45 g is provided. And, by receiving the rings 45 a and 45 a rotatably in these ring receiving portions 45 g and 45 g, the rotor 45 b is formed with the air reservoir 45 e and the axle 201. It is rotatable with respect to the axle 201 in a state where the shaft hole 43a communicates with the axle 201.

The connecting pipe 3 13 is attached to the pipe connector 45 c of the rotor 45 b configured as described above, so that the connecting pipe 3 13 and the axle 201 are connected to the rotor 4. It is rotatably connected via 5b. Further, by this connection, the connecting path 303 formed inside the connecting pipe 3 13 communicates with the shaft hole 43 a formed in the axle 201 of the wheel 202.

Further, the connecting pipe 3 13 is attached to the inner casing 3 a via the connecting tool 3 14 as shown in FIG. 15, whereby the connecting path formed inside the connecting pipe 3 13 is formed. A communication supply passage 13b partitioned by the partition wall 7 from the inner casing 3a and the inner casing 3a is connected to be able to ventilate.

Although not shown, the connector 314 is provided with a pressure adjusting section for adjusting the air pressure of the compressed air supply passage 300 for the other portion. The pressure adjusting section has the same configuration as the pressure adjusting section 12 of the first embodiment.

The saddle delivery supply path 301 of the compressed air supply path 300 for the other part is formed inside the pipe member 310. The base end of the pipe member 310 forming the saddle delivery supply path 301 is connected to the axle 201 of the wheel 202 via a connector 310a. As a result, the saddle delivery supply path 301 and the shaft hole 43a of the axle 201 are connected to each other so as to allow ventilation.

The tip of the pipe member 310 is connected to a saddle section 140 provided on the bicycle.

As shown in FIG. 18, the saddle portion 140 of this embodiment to which the pipe member 310 is connected includes a seat 141 for a person to sit on, and a seat support portion for supporting the seat 144. 1 4 and 2 are provided. Further, the seat support section 142 includes a sheet support section 144 supporting the sheet 141 and a sheet mounting section 150 to which the sheet support section 144 is mounted so as to be vertically movable. I have.

The seat mounting section 150 has an air holding section 1501 that holds air inside. I have. Further, the air holding section 15 1 is provided with an air inlet 15 2 for introducing air. Then, a pipe member 310 is connected to the air inlet 152. As a result, the saddle delivery supply path 301 and the air holding section 151 are connected to each other in a permeable manner.

The lower side of the seat mounting portion 150 is fitted and fixed in a stand pipe 210 of the bicycle. Note that the seat mounting portion 150 is not limited to one that is separate from the vertical pipe 210, and may be a part of the vertical pipe 210, for example. The upper side of the sheet support piece 144 is fixed to the sheet 141. An air pressing portion 144 for pressing the air of the air holding portion 151 downward is provided below the seat supporting piece 144. The air pressing portion 144 is disposed inside the air holding portion 151 so as to be vertically slidable along the inner peripheral wall of the air holding portion 151 of the seat mounting portion 150. .

In this embodiment, as shown in FIG. 18, a coil spring 15 as a pressing portion urging member for urging the air pressing portion 144 upward is provided inside the air holding portion 151. 3 is provided so that the air holding portion 144 sliding down the air holding portion 151 can be assisted when returning upward by the air pressure of the compressed air.

When a downward force is applied to the air pressing portion 144 by, for example, a person sitting on the seat 144 configured in this way, the air pressing portion 144 releases the air in the air holding portion 151. It slides downward together with the sheet 141 while pressing and compressing from the upper side to the lower side.

Further, when the force applied to the air pressing portion 144 is reduced, the seat 144 returns upward due to the compressed air pressure in the air holding portion 151. As a result, the seat 141 can have elasticity, the impact force applied to the seat 141 can be absorbed, and the ride comfort can be improved.

Next, the operation of the automatic bicycle air supply mechanism of the third embodiment will be described. The sliding part 3 4 of the first compressed air generating part 10 a positions the compression chamber 31 at the lowest position A 1, and the sliding part 34 of the second compressed air generating part 10 b is the compression chamber 3 From the state shown in FIG. 15 in which 1 is arranged at the uppermost position B1, for example, by running a bicycle, the wheel body is rotated with respect to the axle 201. As a result, the hub body 102 rotates during the rotation, and together with the hub body 102, the row of the piston member 32 of the first compressed air generator 10 a is lowered. The roller 37 travels on the cam surface 91 a of the cam 9, and the roller 37 of the biston member 32 of the second compressed air generator 1 b travels on the cam surface 91 a of the cam 9. When the vehicle travels, the first compressed air generation unit 10a, like the first compressed air generation unit 1a of the first embodiment, slides the piston rod 3 3 into the compression chamber 3a. As 1 slides from the lowermost position A1 to the uppermost position B1, the air in the compression chamber 31 is compressed to a certain compression ratio. Then, the compressed air is sent from the compressed air supply passage for pneumatic tires 20a to the air holding tube 103b of the pneumatic tire 103 as appropriate. When the vehicle further travels, the sliding portion 34 of the piston rod 33 slides in the compression chamber 31 from the uppermost position B1 to the lowermost position A1, and passes through the air intake port 4 when sliding. Then take in the air. Also in this case, the air in the partitioned space portion 111 of the hub 102 is taken into the compression chamber 31 from the air intake port 4 via the first ventilation path 51. In addition, air outside the hub body 102 is taken into the partitioned space portion 111 through the second ventilation path 52 and the third ventilation path 54. Therefore, also in the third embodiment, it is possible to prevent water such as rainwater from entering the compression chamber 31.

On the other hand, the second compressed air generator 10b is arranged such that the sliding portion 34 of the piston port 33 of the first compressed air generator 10a moves the compression chamber 31 from the lowermost position A1 to the uppermost position B. When sliding toward 1, the sliding part 3 4 of the biston opening 33 of the second compressed air generating part 10b moves the compression chamber 31 from the uppermost position B1 to the lowermost position A1. When it slides and passes through the air intake port 4 during the sliding, it takes in air. Also in this case, it is possible to prevent water such as rainwater from entering the compression chamber 31.

The sliding part 34 of the piston rod 33 of the second compressed air generating part 10b is the same as the sliding part 34 of the piston rod 33 of the first compressed air generating part 10a. When sliding from the uppermost position B1 to the lowermost position A1, the compression chamber 31 is moved from the lowermost position A1 toward the uppermost position B1. Compress the air in 1 to a certain compression ratio.

Then, the air compressed by the second compressed air generator 10b is sent from the compression chamber 31 to the communication supply path 13b, and from the communication supply path 13b to the connection path 303, the axle 2 0

It is sent to the saddle sending supply path 301 through the one shaft hole 43a sequentially. Further, the saddle delivery supply path 301 is sent to the air holding section 151 of the saddle section 140. That In this case, since the connection path 303 and the shaft hole 43a are rotatably connected via the connection hole 45i of the rotary connection member 45, when the wheel body rotates during traveling, The connection path 303 and the shaft hole 43a can maintain a connected state, and the compressed air is generated by the second compressed air generator 10b during traveling, and the generated compressed air is transmitted from the wheels 202 to the bicycle. Air can be sent to the saddle part 140.

As a result, the air holding section 151 can always be maintained at the same air pressure as the compressed air supply path 300 for the other portion, and the air pressure of the air holding section 151 is lower than a predetermined air pressure set in advance. Then, the compressed air that is sequentially generated by the second compressed air generation unit 10b can be sequentially introduced as the vehicle travels.

In the third embodiment, the air holding portion 1551 is pressed by the air pressing portion 144 to compress the air in the air holding portion 151, but the present invention is not limited to this embodiment. , May be changed as appropriate. For example, an air holding part 15 1 is provided in a part of the seat 14 1, and when a person sits on the seat 14 1, the load is received by the air holding part 15 1 so that the seat 14 1 itself has elasticity. May be provided.

In the case where the air pressing portion 144 is provided, as in the above embodiment, the air attaching portion 150 is provided in the seat mounting portion 150, and the air pressing portion 144 is provided in the saddle portion 140. Not only the form, but also an air holding portion 151 can be provided on the sheet support piece 144 and an air pressing portion 144 can be provided on the sheet mounting portion 150, and can be changed as appropriate. Further, the air holding section 15 1 may be provided with a check valve for preventing a back flow of air from the air holding section 15 1 to the saddle delivery supply path 301, which can be changed as appropriate. .

Further, in the third embodiment, the automatic air supply mechanism is provided on the front wheel 202, but may be provided on the rear wheel, and may be changed as appropriate.

Next, an automatic air supply mechanism according to the fourth embodiment will be described with reference to FIGS. The automatic pneumatic supply mechanism of the fourth embodiment is provided in a bicycle as a vehicle to supply air to pneumatic tires of the wheels and to supply air to a brake device as another part of the bicycle other than the pneumatic tires to brake the vehicle. It is said to prevent overheating of the equipment.

The automatic air supply mechanism of the fourth embodiment has a first pressure similar to that of the third embodiment. It comprises two compressed air generating sections, a compressed air generating section 400a and a second compressed air generating section 400b, and compressed air supply paths 200a and 400o.

The first compressed air generating section 400a and the second compressed air generating section 400b are mounted on rear wheels of a bicycle as a vehicle. The rear wheel axle 201 and the tire itself (not shown) have substantially the same configuration as that of the third embodiment.

Further, the first compressed air generating section 400a and the second compressed air generating section 400b of the fourth embodiment are respectively defined by an air intake port 4 and a rear wheel hub body 402. There is provided a first air passage 51 communicating with the part 111, and a second air passage following the first air passage 51. However, in the fourth embodiment, a rear wheel hap body provided on the rear wheel is provided.

The right axle gap ventilation path 52 of 402 is closed in a substantially sealed state with the outside by a ring-shaped sealing member 55 0, and the left axle clearance of the hub body 40 2 for the rear wheel Air passage

53 constitutes a second ventilation path, and external air is taken into the section space 111 from the left axle clearance ventilation path 53.

The rest of the first compressed air generator 400a and the second compressed air generator 400b has the same configuration as the first compressed air generator 100a of the third embodiment.

The compressed air supply path of the fourth embodiment is a compressed air supply path for pneumatic tires 20 that guides and supplies the compressed air generated by the first compressed air generator 400 a to the pneumatic tire 103.

0a, and a compressed air supply passage for other parts 400 that guides and supplies the compressed air generated by the second compressed air generator 400b to a brake device provided in the bicycle. The pneumatic tire compressed air supply passage 200a has the same configuration as the pneumatic tire compressed air supply passage 2 of the first embodiment.

Further, the compressed air supply path 400 for the other part of the fourth embodiment is

A communication supply path 13 b communicating with the compression chamber 31 of the 0 0 b, a brake supply path 401 connected to a bicycle braking device 120 described later, and a communication supply path 13 and a connection supply path 402 connecting the b and the brake supply path 401. The communication supply path 13b has the same configuration as that of the third embodiment.

The connection supply path 402 of the other-part compressed air supply path 400 also has the same configuration as the connection supply path 302 of the third embodiment. More specifically, for other parts The connection supply passage 402 of the compressed air supply passage 400 is connected to the shaft hole 43a made in the axle 201, and the shaft hole 43a is connected to the communication supply passage 13b. Road 403. In addition, the connection path 403 is formed inside the connection pipe 413. The connecting pipe 4 13 is rotatably connected to the axle 201 via a rotary connecting member 45, whereby the connecting path 400 of the connecting pipe 4 13 and the axle 200 are connected. The one shaft hole 43a is connected to be permeable and rotatable.

The brake delivery supply path 401 is formed inside the pipe member 410. The base end of the pipe member 410 is connected to the rear wheel axle 201 via a connector 410a. As a result, the brake delivery supply path 401 and the axle hole 43a of the axle 201 are connected to each other in a permeable manner.

The tip of the pipe member 410 is connected to a brake device 120 provided on the rear wheel of the bicycle.

Here, the rear wheel braking device 120 will be briefly described. The brake device 120 used in this embodiment is constituted by an inner expansion brake 120. As shown in FIG. 19, the inner expanding brake 120 is provided with a drum 12

1, a brake shoe 122 as a braking member, and a cover 123 covering these.

The drum 122 has a cylindrical portion 121a, and a lining contact portion 121b on the inner peripheral side of the cylindrical portion 121a. The drum 12 1 is attached to the rear wheel hub body 402 by being attached to the drum mounting screw 405 a of the rear wheel hub body 402 mounted on the rear wheel. Fixed. Thus, the riding contact portion 121b rotates together with the rotation of the rear wheel hub body 402.

The cover 123 includes a disk part 123 a and a cylindrical part 123 b formed at an outer peripheral end of the disk part 123 a. A pipe connection 1 2 3c force S for connecting the brake delivery supply path 401 to the cylinder 1 23 b is drilled so as to penetrate from the outer circumference to the inner circumference of the cylinder 123 b. ing. The cover 123 passes through the axle 201, and is fixed to the axle 201 via a force bar fixing nut 123d. In addition, by this fixing, the cylindrical portion 123 b of the force member 123 covers the drum 121 from the outer peripheral side. The brake shoe 122 includes a pair of arc-shaped shoe pieces 122a and 122a as shown in FIG. Each of the pieces 122a and 122a has a lining 122b and 122b made of synthetic rubber on the outer peripheral side. And these shuffle pieces 1? 2a and 122a are mounted on the inner peripheral side of the drum 122 through fixing bolts 122c that pass through the base ends of each piece 122a and 122a. It is rotatably supported by 123. Thus, each of the shoe pieces 122a and 122a is configured such that the distal end rotates with the base end as the axis of rotation. In addition, a shoe operating cam 124 for rotating the shoe pieces 122a and 122a is disposed between the tips of the shoe pieces 122a and 122a.

The cam for operation 124 has a small-diameter portion 124a and a large-diameter portion 124b having a larger diameter than the small-diameter portion 124a. An arm member 125 for movably operating the shoe operating cam 124 is connected to the shoe operating cam 124, and attached to the cover 123 so as to be able to rotate together with the arm member 125. ing.

The arm member 125 is connected to a brake lever (not shown) via a brake wire 133. Then, the operation of the brake lever causes the arm member 125 to move as shown in FIG. 21, and accordingly, the cam for operation 124 to rotate.

During the rotation, the large-diameter portion 124b of the cam for operation 124 pushes the tip of each piece 122a, 122a. As a result, the linings 1 2 2b and 1 2 2b of the respective pieces 1 2 2a and 1 2 2a press against the lining abutting portion 1 2 1 b of the drum 1 2 1 and the rotation of the drum 1 2 1 Can be braked.

On the other hand, when the operation of the brake lever is stopped, the spring pieces 1 2 2a and 1 2 2a return to their original state due to the urging force of the coil spring 1 26 that connects them. Return, the linings 122b and 122b move away from the lining abutment 1221b of the drum 121.

The tip of the pipe member 4 10 is attached to the pipe connection port 123 c of the cover 123 of the inner expansion brake 120 configured as described above.

The operation of the automatic air supply mechanism for a bicycle according to the fourth embodiment configured as described above will be described. In the fourth embodiment, for example, a bicycle is run and the wheel body is rotated with respect to the axle 201 as in the third embodiment. As a result, the first compressed air generator 400a and the second compressed air generator 400b alternately compress the air. Then, the air compressed by the first compressed air generating section 400a is appropriately sent to the air holding tube of the pneumatic tire through the compressed air supply path 200a for the pneumatic tire.

On the other hand, the air compressed by the second compressed air generation section 400b passes through the supply path 13b for communication, the connection path 400, and the shaft hole 43a of the axle 201 sequentially for brake delivery. It is sent to the supply route 401. Furthermore, it enters the pipe connection port 123c of the brake device 120 from the brake delivery supply path 401 and is blown toward the drum 122 from the pipe connection port 123c. As a result, air can be constantly blown to the drum 122 during traveling, and the generation of heat due to friction between the drum 122 and the linings 122 b, 122 b can be suppressed. Further, even if the brake device 120 is overheated due to, for example, direct sunlight in summer, the vehicle can be cooled by running, and it is possible to prevent the brake device 120 from being disturbed by overheating.

The automatic air supply mechanism according to the embodiment of the present invention configured as described above can also be grasped as follows.

That is, the automatic air supply mechanism according to the embodiment includes a compressed air generation unit that generates compressed air when the wheel body rotates with respect to the axle, and the compressed air generation unit includes a plurality of compressed air generation units. The generator is equipped with a compression chamber for compressing air, an air intake for taking in external air into the compression chamber, and a waterproof mechanism for preventing water from entering the compression chamber through the air intake. It is.

Further, the automatic air supply mechanism of the above embodiment includes a compressed air supply path for a pneumatic tire for supplying the compressed air generated by the compressed air generation unit to the pneumatic tire, and a compressed air generated by the compressed air generation unit. And a compressed air supply passage for other parts for supplying the compressed air to the other parts of the vehicle other than the pneumatic tires. It is supplied to the device. Further, the brake device includes a member to be braked that rotates together with the pneumatic tire, and a braking member that is movable to be able to contact the member to be braked and brakes the rotation of the member to be braked. In addition, the compressed air supply path for other parts guides and supplies the compressed air generated by the compressed air generation section to the saddle section of the bicycle.

The saddle portion includes a seat on which a person sits and an air holding portion that holds air, and the air holding portion is provided so that the seat can be given elasticity by receiving a load applied to the seat. It is.

The saddle section includes a sheet support section that supports the sheet so as to be vertically movable, the air holding section is provided on the sheet support section, and the sheet support section includes an air pressing section that can press air from the air holding section. The air pressing section presses the air in the air holding section when a downward load is applied to the sheet, and the pressing compresses the air in the air holding section and allows the sheet to move downward. As a result, the seat has elasticity.

The other part of the compressed air supply path includes a communication supply path that communicates with the compression chamber of the compressed air generation part, and another part of the bicycle saddle part or a supply part supply passage that is connected to the brake device. And a connecting supply path connecting the communicating supply path and the other-part sending supply path. The connection supply path includes a shaft hole formed in the axle along the axial direction of the axle and connected to another supply passage, and a connection path connecting the shaft hole and the communication supply path. I have. Further, the connection path and the shaft hole are rotatably connected via a connection hole rotatably connected to the shaft hole.

By doing so, the compressed air generated by the compressed air generator that rotates together with the wheel body during traveling can be supplied from the connection path to the connection supply path via the shaft hole, and from the connection supply path to the saddle portion or the brake device of the bicycle, etc. Can be sent to other parts. Note that, in the above-described embodiment, the one provided with one compressed air generating unit and the one provided with two compressed air generating units have been exemplified. However, three or more compressed air generating units may be provided and can be appropriately changed. In the case where the compressed air generator is composed of two parts, when one of the sliding parts slides from the lowermost position to the uppermost position in the compression chamber as in the above-described embodiment, the other is used. The configuration is not limited to the configuration in which the sliding portion slides from the uppermost position to the lowermost position in the compression chamber at substantially equal intervals in the circumferential direction of the drum, and can be changed as appropriate. However, when one of the sliding parts slides from the lowermost position in the compression chamber to the uppermost position, the other sliding part slides from the uppermost position to the lowermost position in the compression chamber. Yo By arranging as described above, compressed air can be efficiently generated, which is advantageous in this respect.

Also, when three or more compressed air generators are provided, they may be arranged at substantially equal intervals in the circumferential direction of the cam, but they may not be arranged at equal intervals and can be changed as appropriate. Further, in the above embodiment, the compressed air generated by the compressed air generating unit is supplied to the saddle portion of the bicycle or the brake device as another portion other than the pneumatic tire through the other-part compressed air supply path. However, other parts than the pneumatic tire are not limited to the saddle part or the brake device of the bicycle, and can be changed as appropriate.

In the above embodiment, the compressed air supply path for the pneumatic tire is provided.However, for example, the compressed air generator and the pneumatic tire are connected without providing the compressed air supply path for the pneumatic tire. The compressed air generated by the compressed air generator may be directly supplied to the air tire, and may be changed as appropriate.

Further, the automatic air supply mechanism of the present invention can be provided in a vehicle having a wheel body rotatable with respect to an axle, for example, a two-wheeled vehicle such as a unicycle, a motorcycle, a rear car, various tricycles, a four-wheeled vehicle, It can be used for elevators having elevator wheels. Further, in the above embodiment, the compression operation body is constituted by the piston element 32, but the compression operation body is not limited to this embodiment, and can be appropriately changed. For example, the compression chamber 31 is expanded to the inside of the hub body 102, and a stretchable expansion / contraction portion as a compression operation body is formed on the entire peripheral wall of the compression chamber 31 or a part in the axial direction. It is assumed that a cam abutting portion that abuts on the cam surface 91 a of the cam 9 is formed on the end face of the chamber 31. Then, the cam contact portion slides on the cam surface 91a along with the rotation of the knob body 102, and the cam contact portion is pressed against the cam surface 91a during the sliding. The volume of the compression chamber 31 changes from the expanded state to the reduced state, and compresses the air.

The pneumatic tire automatic air supply mechanism according to the present invention includes a compressed air generation unit that generates compressed air when the wheel body rotates with respect to the axle, so that the compressed air generated by the compressed air generation unit can be supplied to the pneumatic tire. Shall be done.

In this way, when the wheel body rotates with respect to the axle, the compressed air can be compressed by the compressed air generator to generate compressed air, and the generated compressed air can be sent to the air tire. Therefore, for example, when a bicycle is run, the wheel body is turned around the axle. This allows the air to be automatically compressed to a constant pressure in the compression section, and the compressed air is sent to the pneumatic tire to constantly keep the air pressure of the air tire constant.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the compressed air generating unit includes a plurality of compressed air generating units, each of the compressed air generating units includes: a compression chamber; The compression operation body compresses air in the compression chamber by being pressed by a cam provided on the axle when the wheel body rotates with respect to the axle. It is assumed that the compressor is arranged so that the compression operation bodies of the respective compressed air generating units are sequentially pressed by the cams during rotation and the compression operations can be started sequentially.

In this way, when the wheel body rotates with respect to the axle, a plurality of compressed air generators generate a plurality of times more compressed air than when a single compressed air generator is provided to generate compressed air. it can. For example, as in a wheelchair, the running distance is short and the number of rotations of the wheels is small in normal running, and the amount of compressed air that can be generated in short running is small. Difficult to supply. However, according to the present invention, within a short time after the start of traveling at the stage where the number of rotations of the wheels is low, a plurality of compressed air generating units generate sufficient i compressed air and supply it to the air tire. Can be set to a predetermined air pressure.

On the other hand, when the wheel body rotates with respect to the axle, the compression operation body of each compressed air generation unit starts to be pressed sequentially by the force and the compression operation can be started sequentially, so that, for example, the air in the compression chamber is simultaneously generated by a plurality of compressed air generation units. Compressed air can be generated with a smaller force than when air is compressed, and the resistance of the rotation of the wheel body to the axle can be reduced. For example, it is composed of one cam, and a plurality of compressed air generators are arranged so that the positions of the respective compressed air generators are shifted in the circumferential direction of the cam. Thus, when the wheel body is rotated with respect to the axle, the compression operation bodies of the respective compressed air generation units can be sequentially pressed by the cams, thereby facilitating manufacture. Also, a plurality of compressed air generating sections can be arranged in a line along the circumferential direction of the cam, so that the length of the axle of the entire apparatus in the axial direction can be reduced. Therefore, for example, it can be easily attached to a hub body provided on a wheel body of a bicycle or a wheelchair, and can be suitable for a bicycle or a wheelchair. In the automatic air supply mechanism for a pneumatic tire according to the present invention, the automatic air supply mechanism includes a compression unit for other parts for guiding the compressed air generated by the compressed air generation unit to another part of the vehicle other than the pneumatic tires and supplying the compressed air. An air supply channel shall be provided.

By doing so, for example, the compressed air generated in one of the plurality of compressed air generators is supplied to the pneumatic tire through the pneumatic tire compressed air supply path, and is generated in the other compressed air generators. The compressed air can be supplied to the air holding portion provided in the saddle portion of the bicycle as another portion by the compressed air supply passage for the other portion, so that the seat of the saddle portion has elasticity. Alternatively, as another part, for example, a brake device of a bicycle is supplied by a compressed air supply passage for another portion, thereby preventing the brake device from overheating.

In the automatic air supply mechanism for a pneumatic tire of the present invention, the compressed air generator includes two parts, a first compressed air generator and a second compressed air generator. Each of the compression operation bodies of the first and second compressed air generating units includes a sliding portion that slides in the sliding chamber, and a cam contact portion that contacts the cam, and the sliding portion reduces the volume of the compression chamber. The slider slides in the range from the lowest position where the compressor is in the maximum state to the uppermost position where the volume of the compression chamber is in the minimum state, and the cam abutment is pressed by the cam when the wheel body rotates with respect to the axle. Portion slides from the lowermost position to the uppermost position in the compression chamber, and the air in the compression chamber is compressed at the time of the sliding, so that one of the first compressed air generation section and the second compressed air generation section slides. When the moving part slides the compression chamber from the lowest position to the highest position, It is assumed that the other sliding part is arranged so that the compression chamber slides from the uppermost position to the lowermost position.

By doing so, the first compressed air generation unit and the second compressed air generation unit alternately compress the air in the compression chamber, and while one of them is performing the compression operation on the air in the compression chamber, The air in the compression chamber can not be compressed. Thus, for example, twice as much compressed air can be generated with almost the same force as in the case of providing one compressed air generating unit and generating compressed air.

In the automatic pneumatic tire air supply mechanism according to the present invention, the compressed air generating unit includes: a compression chamber; a compression operation body configured to compress air in the compression chamber; and an air for taking in external air into the compression chamber. With a suction port, the compression operation body maximizes the volume of the compression chamber A sliding portion that slides in the sliding chamber from a lowermost position to a lowermost position to an uppermost position to minimize the volume of the compression chamber. This sliding portion is used when the wheel body rotates with respect to the axle. When the compression chamber slides from the lowermost position to the uppermost position, the air in the compression chamber is compressed, and the air intake port is a sliding part that moves the compression chamber in the range from the lowermost position to the uppermost position. Assume that it is arranged near the lowest position in the movement range. By doing so, when the sliding portion slides the compression chamber from the lowermost position to the uppermost position in compressing the air, the sliding portion moves beyond the air intake from the lowermost position, and then moves from the uppermost position to the uppermost position. When sliding to the position, the air in the compression chamber can be compressed without escaping to the air intake. This eliminates the need for a non-return valve to prevent air from flowing from the compression chamber to the air intake port when air is compressed by sliding of the sliding part in the compression chamber, which can be simplified and manufactured at low cost. it can.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the compressed air generator is attached to a hub provided on the wheel body, and takes in air into the compression chamber from inside the hub to compress the taken air. It shall be possible. By doing so, air can be taken into the compression chamber from inside the hub body into which water such as rainwater does not easily enter, so that there is little risk of water entering the compression chamber with the air.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the compressed air generating unit includes a compression chamber for compressing air, an air intake for taking in external air into the compression chamber, and an air intake from the air intake to the compression chamber. It shall be provided with a waterproof mechanism to prevent water from entering.

In this way, the waterproof mechanism prevents rainwater and the like from entering the compression chamber through the air intake port together with the air even when the vehicle travels on a rainy day, for example. It can be prevented from being sent into a pneumatic tire.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the wheel body includes a hub body rotatably supported on an axle, the compressed air generation unit is attached to a haptic body of the wheel body, and the waterproof mechanism is provided. Is equipped with a first air passage that allows the air intake port and the inside of the hub body to communicate with each other in a ventilable manner. Prevents water from entering the air generator Shall be.

By doing so, the air inside the haptic, such as rainwater, into which water is difficult to enter can be taken into the compression chamber from the air intake port, and there is little possibility that water will enter the compression chamber from the air intake port together with air. it can. This makes it possible to easily form a water-proof mechanism at low cost.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the hub body includes a cylindrical hub body, and support portions that support the hap body from both sides in the axial direction. The hub body is rotatable with respect to the axle by being supported by the hub body, and the hub body and the support portion form a partition space section that is partitioned from the outside inside the hub body. It is assumed that the vehicle has a second air passage formed in the support portion so as to communicate the partition space of the hub body with the outside.

By doing so, it is possible to make it difficult for water such as rainwater to enter the compartment from the second ventilation path. As a result, when air is supplied from the compartment to the air intake, it is possible to reliably prevent water from being supplied together with the air.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, each of the support portions of the hap body includes a steel ball receiving portion capable of rolling a plurality of steel balls, and an axle radially inside the steel ball receiving portion. An axle hole that is rotatably inserted into the axle, and a steel ball receiving portion is rotatably supported via a plurality of steel balls on the axle that passes through the axle hole, so that the hub body is rotatable relative to the axle. And at each support portion of the hub body, pass through the axle gap formed between the inner peripheral surface of the axle hole and the axle and the steel ball gap formed between the steel balls. An axle gap ventilation path is formed to extend from the portion so as to allow ventilation, and the second ventilation path has at least one of the two axle clearance ventilation paths as a component.

When arranging steel balls in the steel ball receiving section, grease is usually arranged together to smooth the rolling of the steel balls. Therefore, water can hardly pass through the steel ball gap and can hardly pass through the axle gap ventilation path. Such an axle gap ventilation path is formed in a normal hap body. Therefore, it is possible to use the axle gap air passage formed in the normal hap body without separately forming the second air passage, and to form the waterproof mechanism at low cost. In the automatic air supply mechanism for a pneumatic tire according to the present invention, the two axle clearances are provided. When one of the air passages is substantially sealed from the outside of the haptic body by the seal member, the other one of the axle clearance air passages constitutes a part or the whole of the second air passage. The waterproofing mechanism includes a third ventilation path that communicates the other one of the axle clearance ventilation paths that constitutes the second ventilation path with the outside, and the air outside of the hub body flows through the third ventilation path through the third ventilation path. It shall enter the inside of the hub body from the axle gap ventilation path.

By doing so, even when it is costly to form the third ventilation path, only one third ventilation path needs to be formed, and the overall cost can be reduced.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the third ventilation path is provided between an inner peripheral surface of a cylindrical body attached to the hub body so as to pass through the axle and an outer periphery of the axle. It is assumed that the inner peripheral surface of the cylindrical body is provided with a tapered portion whose inner diameter gradually increases toward the outer side.

By doing so, even if water enters the third ventilation path, the water can be moved to the larger diameter of the tapered part and driven out by the centrifugal force accompanying rotation of the hub body. . In addition, water can be transmitted to the larger diameter of the tapered portion by its own weight, and can be driven out. Therefore, it is possible to make the third ventilation path difficult for water to pass through.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the compressed air generating unit includes a compression chamber, and a compression operation body that compresses air in the compression chamber, and a first end of the compression operation body is provided in the compression chamber. The second end of the compression operation body is held by a cam provided on the axle, so that when the wheel body rotates with respect to the axle, the compression operation body follows the cam, and the second end of the compression operation body follows the cam. Slides to compress the air in the compression chamber. For example, when the end of the compression operating body is pressed against the cam by a coil spring for urging the compression operation body to maintain the contact state, the compression operation body must be slid against the urging force. However, in this embodiment, there is no resistance when rotating the wheel body with respect to the axle. However, in this embodiment, since the compression operation body is held by the cam and the coil panel for biasing is not provided, the compression operation is not performed. The body can slide smoothly with a small force. Thereby, the resistance when rotating the wheel body with respect to the axle can be reduced. In the pneumatic tire automatic air supply mechanism of the present invention, the compression operation body is detachably held by a force bar. By doing so, the compressed air generating portion can be easily removed from the cam, and the compressed air generating portion removed from the cam can be easily assembled. As a result, parts can be easily replaced by disassembly or the like, and maintenance can be performed easily.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the cam includes a cam body having a cam surface on an outer periphery thereof in contact with a compression operation body, and an operation body disposed on a side of the cam surface of the cam body. The compression operation body includes a rod-shaped operation main body, a cam contact portion that abuts on a cam surface of the cam body, and a cam holding portion that is held by the operation body holding portion of the force member. The operating body is radially movable outside the cam surface of the cam body in a radial direction, and the cam contact portion is located between the cam surface of the cam body and the operating body. The cam holding section is detachably held by the operating body holding section.

In this way, when the compression operation body is pressed by the cam to perform the air compression operation, the operation body of the compression operation body is moved from the radial inner side by the cam through the cam contact portion. Outside. Thus, the operation body can be moved efficiently and smoothly in the radial direction of the cam.

When the compression operating body is held by the cam or removed from the held cam, the force holding part is held by the operating body holding part arranged on the side of the cam surface of the cam body. It is only necessary to release the holding, and the operation of removing the compression operation body from the cam can be easily performed. On the other hand, if the cam holding part is held by the operating body holding part arranged on the side of the cam surface of the cam body, when the compression operating body is pulled by the cam, the compression operating body is moved to the side. Will be pulled from. However, when the compression operation body is pulled by the cam, air is not compressed, so that a large force is not applied to the operation body, so that the operation body can be smoothly pulled and operated without any trouble.

In the automatic air supply mechanism for a pneumatic tire according to the present invention, the cam contact portion is configured by a part of an outer periphery of a roller rotatably attached to the operation main body, and the cam holding portion includes: The roller shall be rotatably supported by the operation body, and shall consist of a holding shaft held by the operation body holding portion of the force member.

In this way, when the compression operation body is pressed, the cam surface on the cam contact portion is pressed. The force in the tangential direction can be reduced, and the operating body of the compression operating body can be moved more efficiently and smoothly in the radial direction of the cam.

In addition, a holding shaft that rotatably supports the roller on the operation body is used as a cam holding portion, and this holding shaft is held by the operating body holding portion of the cam, so that the holding shaft can also be used, and a separate cam holding portion is formed. And can be easily manufactured at low cost.

Although the present invention has been described above as preferred embodiments, each term is used for description, not for limitation, and departs from the scope and spirit of the present invention. Without departing from the scope of the appended claims, it can be modified.

Claims

The scope of the claims

1. A pneumatic tire air automatic supply mechanism capable of automatically supplying air to a pneumatic tire provided on a wheel body rotatable with respect to a vehicle axle,

A pneumatic tire characterized in that it has a compressed air generator for generating compressed air when the wheel body rotates with respect to the axle, so that the compressed air generated by the compressed air generator can be supplied to the pneumatic tire. Automatic air supply mechanism.

2. In the pneumatic tire automatic air supply mechanism according to claim 1,

The compressed air generator is composed of a plurality of components,

Each compressed air generator has a compression chamber, and a compression operation body that compresses air in the compression chamber.

The compression operation body compresses air in the compression chamber by being pressed by a force provided on the axle when the wheel body rotates with respect to the axle,

The plurality of compressed air generators are arranged such that the compression operation bodies of the compressed air generators are sequentially pressed by the cams when the wheel body rotates with respect to the axle, so that the compression operation can be started sequentially. .

3. In the pneumatic tire automatic air supply mechanism according to claim 1,

The above-mentioned automatic air supply mechanism is provided with a compressed air supply path for another part for guiding the compressed air generated by the compressed air generation part to another part of the vehicle other than the air tire and supplying it.

4. In the pneumatic tire automatic air supply mechanism according to claim 2,

The compressed air generator is composed of a first compressed air generator and a second compressed air generator,

Each of the compression operation bodies of the first compressed air generation unit and the second compressed air generation unit includes a sliding portion that slides in the sliding chamber and a cam contact portion that contacts the cam,

The sliding portion starts to reduce the volume of the compression chamber from the lowest position where the volume of the compression chamber is maximized. Slide the range up to the top position to make small,

The cam abutting portion is pressed by the cam when the wheel body rotates with respect to the axle, and the pressing force causes the sliding portion to slide the compression chamber from the lowermost position to the uppermost position. The air in the compression chamber is compressed,

When one of the sliding parts slides the compression chamber from the lowermost position to the uppermost position, the other one of the first compressed air generating part and the second compressed air generating part It is arranged so that it moves from the top position to the bottom position.

5. In the pneumatic tire automatic air supply mechanism according to claim 1,

The compressed air generating unit includes a compression chamber, a compression operation body that compresses air in the compression chamber, and an air intake port for taking in external air into the compression chamber.

The compression operation body includes a sliding portion that slides in the sliding chamber from a lowermost position where the volume of the compression chamber is maximized to an uppermost position where the volume of the compression chamber is minimized. Performs compression operation on the air in the compression chamber when the section slides from the lowermost position to the uppermost position when the wheel body rotates with respect to the axle,

The above-mentioned air intake port is arranged near the lowest position in the moving range of the sliding portion that slides in the range from the lowest position to the highest position in the compression chamber.

6. In the pneumatic tire automatic air supply mechanism according to claim 1,

The compressed air generator is attached to a hub provided on a wheel body and is capable of taking air from inside the hub into a compression chamber and compressing the taken air.

7. The pneumatic tire automatic air supply mechanism according to claim 1,

The compressed air generating section includes a compression chamber for compressing air, an air intake for taking in external air into the compression chamber, and a waterproof mechanism for preventing water from entering the compression chamber through the air intake. What you have.

8. The pneumatic tire automatic air supply mechanism according to claim 7, The wheel body includes a hub body rotatably supported on an axle, and the compressed air generating unit is attached to the hub body of the wheel body.

The waterproofing mechanism includes a first air passage that allows the air intake port and a part of the haptic body to communicate with each other in a permeable manner, and through this first air passage, air is taken into the compression chamber from inside the hub body. A device that prevents water from entering the compressed air generator.

9. In the pneumatic tire automatic supply mechanism according to claim 8,

The hub body includes a cylindrical hap body and support portions that support the hap body from both sides in the axial direction. These support portions are rotatably supported by the axle, so that the hub body is attached to the axle. In addition to being freely rotatable with respect to the hub body, the hub body and the support portion form a partitioned space inside the hap body, which is partitioned from the outside.

The waterproofing mechanism includes a second ventilation path formed in a supporting portion so as to communicate the partitioned space of the hub body with the outside.

10. The pneumatic tire automatic air supply mechanism according to claim 9,

Each of the support portions of the hub body includes a steel ball receiving portion rotatably receiving a plurality of steel balls, and an axle hole radially inside the steel ball receiving portion and through which the axle can rotate. Since the steel ball receiving portion is rotatably supported by a plurality of steel balls on the axle passing through the hole, the hub body is rotatable with respect to the axle, and each support portion of the hub body is supported. The axle clearance extends from the compartment to allow air to pass through the axle clearance formed between the inner peripheral surface of the axle hole and the axle and the steel ball gap formed between the steel balls. An airway is formed,

The second ventilation path has at least one of these two axle clearance ventilation paths as a constituent element.

11. In the pneumatic tire automatic air supply mechanism according to claim 10,

One of the two axle gap air passages is substantially sealed from the outside of the hub body by a seal member, so that the other axle gap air passage is partially or entirely part of the second air passage. Is composed of The waterproofing mechanism includes a third ventilation path that communicates the other one of the axle clearance ventilation paths that constitutes the second ventilation path with the outside, and the outside air of the haptic body passes through the third ventilation path through the third ventilation path. That enters the hub from the axle gap air passage.

1 2. In the pneumatic tire automatic air supply mechanism according to claim 11,

The third ventilation path is formed between the inner peripheral surface of the cylindrical body attached to the hub body so as to pass through the axle and the outer periphery of the axle,

The inner peripheral surface of the cylindrical body is provided with a tapered portion whose inner diameter gradually increases toward the outer side.

1 3. In the pneumatic tire automatic air supply mechanism according to claim 1,

The compressed air generating unit includes: a compression chamber; and a compression operation body that compresses air in the compression chamber.

A first end of the compression operation body is slidably disposed in the compression chamber,

The second end of the compression operation body is held by a cam provided on the axle, so that when the wheel body rotates with respect to the axle, the compression operation body follows the cam and slides in the compression chamber to release air in the compression chamber. One that performs compression operations.

14. In the pneumatic tire automatic air supply mechanism according to claim 13,

The compression operation body is detachably held by a cam.

15. In the pneumatic tire automatic air supply mechanism according to claim 13,

The cam includes: a cam body having a cam surface on its outer periphery that comes into contact with the compression operation body; and an operation body holding portion arranged on a side of the cam surface of the cam body.

The compression operation body includes a rod-shaped operation main body, a cam contact portion that abuts on a cam surface of the cam main body, and a cam holding portion that is held by the operation body holding portion of the cam.

The operating body is radially outside the cam surface of the cam body so as to be movable in the radial direction.

The cam contact portion is disposed between the cam surface of the cam body and the operation body, The force holding part is detachably held by the operating body holding part.

16. In the pneumatic tire automatic air supply mechanism according to claim 15,

The cam abutting portion is formed of a part of an outer periphery of a roller rotatably attached to the operation body,

The above-mentioned cam holding portion is composed of a holding shaft that supports the roller rotatably on the operation body and is held by the operation body holding portion of the cam.