JPH0898995A - Drive transmitting device of fan for drier - Google Patents

Abstract

PURPOSE: To provide a drive transmitting device of a fan for a drier whose whole thickness can be thinned and whole can be downsized and weight can be reduced and durability is not impaired even when it is used in a high temperature and humid place. CONSTITUTION: A steel support shaft 3 and a bush 4 are installed on a holder 2 having a thin elliptic shape, and a resinous driving gear 5 and a driven gear 6 are rotatably installed on the support shaft 3, and a drum is connected to the driving gear 5, and a fan is connected to the driven gear 6, and an idle gear 7 composed of a small gear 8 and a large gear 9 is rotatably journalled to the bush 4. The small gear 8 is meshed with the driving gear 5, and the large gear 9 is meshed with the driven gear 6. When the drum rotates, the torque is transmitted to the fan through the driving gear 5, the small gear 8, the large gear 9 and the driven gear 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive transmission device effective for transmitting rotation of a drum of a dryer to a fan.

[0002]

2. Description of the Related Art A conventional dryer used for drying laundry containing water is
Various types have been proposed, for example, those shown in FIGS. 7 and 8 are already known.

That is, this dryer has a drum 27 rotatably provided in a body 25 for storing laundry containing water, and a body 25 for exhausting air in the drum 27. The fan 28 provided on the outside is connected to the body 25 by a support shaft 33 provided through the body case 34 located at the end of the body 25 so as to be rotatably attached to the body 25 and provided on the body 25. The flat belt 29 is wound between the drive motor 26 and the drum 27, and the round belt 30 is wound between the drive motor 26 and the fan 28. The same drive motor 26 drives the drum 27 and the fan 28. And are configured to rotate together.

Then, laundry containing water is stored in the drum 27, the drum 27 and the fan 28 are integrally rotated by the drive motor 26, and a heater (not shown) provided in the body 25 is installed. Operate and drum 2
7 is heated, and the air in the drum 27 is exhausted by the fan 28 to the rear of the drum 27 through the hole 34a of the main body case 34 to dry the laundry or the like (see FIG. 8).

However, in the conventional dryer configured as described above, the flat belt 29 wound around the drum 27 and the drive motor 26, and between the fan 28 and the drive motor 26. Since the round belts 30 wound around the two are made of rubber, they are easily affected by heat and moisture, and particularly, the round belt 30 on the fan 28 side is easily affected. Therefore, there is a risk of deterioration and breakage in a short period of time, which is a problem in terms of durability.

If the surfaces of the belts 29 and 30 are accidentally scratched during assembly, the parts may be broken during use, and it is necessary to pay close attention not to damage them during assembly. there were.

Furthermore, when replacing the belts 29 and 30, the tensions of the belts 29 and 30 must be adjusted and then the drive motor 26, the drum 27 and the fan 28 must be tightened again. It took a lot of time to replace the.

Since the belts 29 and 30 are always used in a stretched state, they may be stretched in a short period of time to cause slippage, and it is necessary to regularly adjust the tension of the belts 29 and 30. There was also.

Therefore, the belt type currently used has various problems such as durability, assembling ability and maintainability.

On the other hand, it is considered that the rotation of the drum 27 is transmitted to the fan 28 by providing a drive transmission device composed of a gear train between the drum 27 and the fan 28 without using the rubber belts 29 and 30. To be

However, the drive transmission device composed of a gear train that is currently generally proposed is a type in which both ends of the shaft are supported, and the input and output shafts are often different shafts, and the overall size is large.
In order to use it for fan drive transmission of the dryer, it is necessary to drastically change the structure of the dryer, and most of the drive transmission device is a metal gear train, and besides increasing the size of the whole, Noise is generated, the whole is heavy,
In addition, there is a problem that it is necessary to ensure lubricity for long-term use. Therefore, instead of a belt, a drive transmission device of a currently known type is used for drive transmission of a fan for a dryer. Is impossible.

The present invention can be attached to a dryer without requiring a large structural change, is small in size as a whole, is excellent in heat resistance and durability, and is low in noise and good in lubricity. In addition, it is an object of the present invention to provide a drive transmission device for a fan for a dryer, which does not require nerves during assembly and is easy to replace.

[0013]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a substrate that can be attached to a main body case of a drier, in which a support shaft is provided in a penetrating state, and A drive gear made of resin in a portion located on one side of the substrate,
Further, the driven gears are respectively supported on the parts located on the other side, the driving gears are connected to the drum of the dryer, and the driven gears are connected to the fan of the dryer, respectively. It has a structure in which an idle gear made of resin for drivingly transmitting the driven gear is provided.

[0014]

According to the present invention, by adopting the above means, the rotational force of the drum of the dryer transmitted to the driving gear on one side of the substrate is transmitted to the driven gear on the other side of the substrate via the idle gear. The fan connected to the driven gear is rotated. Therefore, by setting the driving gear, idle gear, driven gear module, number of teeth, etc. to appropriate values, the rotational force of the driving gear can be increased at a predetermined ratio and transmitted to the driven gear. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. 1 to 4 show an embodiment of a drive transmission device for a dryer fan according to the present invention.

This drive transmission device 1 has a holder 2 made of steel, which is a substrate having a thin-walled elliptical shape, a support shaft 3 made of steel mounted in the holder 2 in a penetrating state, and a predetermined distance from the support shaft 3. The bush 4 to be placed and the support shaft 3 on one side of the holder 2
The drive gear 5 made of resin and the driven gear 6 pivotally supported by the support shaft 3 on the other side of the holder 2, and the bush 4 rotatably mounted on the drive gear 5 and the driven gear 6. Resin idle gear 7, which engages with each other, and holder 2
And a resin cover 10 that is attached to the gears 5 and 6 and covers the gears 5, 6, 7.

The size of the holder 2 is such that it can be located in the central hole 16a of the main body case 16, and a semicircular mounting portion is provided at a plurality of locations (three locations in this embodiment) on the peripheral portion. 2a are integrally formed, and each mounting portion 2a is provided with a mounting hole 2b.

A collar portion 3a is provided at the center of the support shaft 3 in the axial direction.
Are integrally formed with each other, and screw portions 3b, 3c, 3d are provided on a portion adjacent to the collar portion 3a and both end portions, respectively.

The drive gear 5 is made of a resin such as nylon or acetal, and has a gear portion 5a having an appropriate module, the number of teeth and the like, and a cylindrical boss portion 5b integrally provided at the center of the gear portion 5a. In addition, a hole 5c for inserting the support shaft 3 is formed at the center of the boss portion 5b, and a portion of the peripheral surface of the boss portion 5b facing the center of the hole 5c is an appropriate portion. It is chamfered in depth.

The driven gear 6 is made of resin such as phenol or acetal, and is made of the same material as the gear portion 6a having an appropriate module and the number of teeth, and the gear portion 6a integrally provided on one side of the gear portion 6a. A cylindrical bearing case 6b made of resin, and a series of holes 6 for inserting the support shaft 3 in the center of the gear portion 6a and the center of the bearing case 6b.
c is formed, and a flange portion 6d is integrally formed at the boundary between the bearing case 6b and the gear portion 6a. The flange portion 6d has a plurality of mounting holes for fixing the fan 18 of the dryer. 6
e is drilled.

The bush 4 has a cylindrical shape in which the peripheral surface is formed in two stages of a large diameter portion 4a and a small diameter portion 4b, and the small diameter portion 4b is inserted into the hole 2c on the upper side of the holder 2. The holder 2 is attached to the holder 2, and a hole 4c for inserting a boss portion 8b of a small gear 8 of an idle gear 7 to be described later is formed in the central portion.

The idle gear 7 is made of a resin such as phenol or acetal, and has an appropriate module that meshes with the gear portion 5a of the drive gear 5, a gear portion 8a having the number of teeth, and the center of one side of the gear portion 8a. 8b integrally provided on the section
A small gear 8 made of a resin such as nylon, acetal or the like, a gear portion 9a made of a resin such as nylon or acetal, having an appropriate module that meshes with the gear portion 6a of the driven gear 6 and having a number of teeth, and the gear portion 9a.
And a large gear 9 including a boss 9b having a hole 9c into which the boss 8b of the small gear 8 can be fitted and which is integrally provided in the center on one side.

In this case, the tip portion of the boss portion 8b of the small gear 8 is chamfered to an appropriate depth, and the chamfered tip portion is fitted into the hole 9c in the center portion of the boss portion 9b of the large gear 9. In addition, the root portion of the boss portion 8b of the small gear 8 is adapted to be inserted into the hole 4c in the central portion of the bush 4.

The cover 10 is made of a resin such as nylon, acetal, or phenol, and has a cylindrical flange portion 10a formed so that the inner dimension matches the outer dimension of the holder 2.
The flange portion 10a includes an elliptical side plate 10b that closes an opening at one end thereof. The flange portion 10a is provided with a cutout portion 10c into which the mounting portion 2a of the holder 2 can be inserted, and the side plate 10b is provided. , The boss portion 5 of the drive gear 5
A hole 10d into which b can be inserted is provided.

The gear portion 5a of the driving gear 5, the gear portion 6a of the driven gear 6, the gear portion 8a of the small gear 8 of the idle gear 7,
The gear portion 9a of the large gear 9 of the idle gear 7 preferably has the combination shown in Table 1 in order to prevent abrasion, but when used in a place where the torque is small, the same material may be used. .

[0026]

Then, in order to integrally assemble the drive transmission device 1 configured as described above, as shown in FIG. 4, the right half portion of the support shaft 3 is inserted into the hole 2d on the lower side of the holder 2 in the drawing. , The collar 3a of the support shaft 3 is brought into contact with the other side of the holder 2,
The nut 11 is screwed into the threaded portion 3b on the right side of the collar portion 3a of the support shaft 3 protruding from one side of the holder 2, and the support shaft 3 is fixed to the holder 2 by tightening with a predetermined torque.

Next, the washer 12 and the drive gear 5 are mounted in this order on the right half portion of the support shaft 3 protruding from one side of the holder 2, and the hole at the center of the boss portion 5b of the drive gear 5 is attached. 5
While the right half of the support shaft 3 is inserted through c, the washer 1 is attached to the left half of the support shaft 3 protruding from the other side of the holder 2.
3, the driven gear 6 is mounted in that order, and the left half of the support shaft 3 is inserted through the gear 6a of the driven gear 6 and the hole 6c in the center of the bearing case 6b.

Next, the small diameter portion 4b of the bush 4 is inserted into the hole 2c of the holder 2, the side surface of the large diameter portion 4a of the bush 4 is brought into contact with the other side of the holder 2, and is projected from one side of the holder 2. The retaining ring 14 is fitted to the small diameter portion 4 b that is formed, and the bush 4 is fixed to the holder 2.

Next, the boss portion 8b of the small gear 8 of the idle gear 7
Through the hole 4c at the center of the bush 4 from one side of the holder 2, one side of the gear portion 8a of the small gear 8 abuts the side surface of the small diameter portion 4b of the bush 4, and the bush 4 is inserted. The large gear 9 of the idle gear 7 is attached to the tip of the boss portion 8b of the small gear 8 protruding from the other side of the holder 2, and the small gear 8 is inserted into the hole 9c in the center of the boss portion 9b of the large gear 9. The tip portion of the boss portion 8b is fitted, and further, the retaining ring 15 is fitted to the tip of the boss portion 8b of the small gear 8 projecting from the boss portion 9b of the large gear 9 so that the small gear 8 and the large gear 9 are connected. Be one.

Next, the cover 10 is mounted on one side of the holder 2, each mounting portion 2a of the holder 2 is positioned in each notch 10c of the cover 10, and each gear 5, 6, 7 is attached to the flange of the cover 10. It will be assembled by being positioned in the inner part of the part 10a.

When the drive gear 5 of the drive transmission device 1 constructed as described above is rotated, the rotational force is transmitted to the driven gear 6 via the small gear 8 and the large gear 9 of the idle gear 7. Therefore, by setting the drive gear 5, the small gear 8 of the idle gear 7, the large gear 9, the module of the driven gear 6, the number of teeth, etc. to appropriate values, the rotational force on the drive side is increased at an appropriate ratio. It can be transmitted to the driven side.

As described above, since the support shaft 3 is disposed in the holder 2 with the central portion thereof supported, and the drive gear 5 is provided on one side and the driven gear 6 is provided on the other side. Since the support shaft is not supported at both ends like the drive transmission device, but is supported at one point, the overall thickness can be reduced,
The overall size and weight can be reduced. further,
Since the holder 2 only supports the central portion of the support shaft 3, the weights on both sides of the holder 2 can be balanced and balanced, and a large bending force can be prevented from acting on the holder 2.

To mount the drive transmission device 1 on the dryer, it is mounted on the main body case 16. That is, the holder 2 is fixed to the central hole 16a of the main body case 16 by inserting a bolt or the like into the mounting hole 2b of the mounting portion 2a, and the boss portion 5b of the drive gear 5 is fixed to the boss of the drum 17 of the dryer. A hole for mounting the collar portion 6d of the driven gear 6 in a state where the driving gear 5 and the drum 17 are connected by fitting to the portion 17a, and the bearing case 6b of the driven gear 6 is inserted into the boss portion 18a of the fan 18. The driven gear 6 and the fan 18 are integrally connected by inserting a bolt through 6e.

Therefore, in the drive transmission device 1, the holder 2 closes the central hole 16a of the main body case 16,
In other words, the drum 17 and the fan 18 are connected with the holder 2 forming a part of the main body case 16.

When the drive motor 20 is operated to rotate the drum 17, the drive gear 5 rotates integrally with the drum 17, and the rotational force of the drive gear 5 causes the rotational force of the idle gear 7 to be the small gear 8 and the large gear. 9 is transmitted to the driven gear 6 and the driven gear 6 and the fan 18 rotate integrally, and the drum 1
The air inside 7 is sucked by the fan 18 through the peripheral hole 16b of the main body case 16 to form an air flow from the inside of the drum 17 to the outside.

As described above, since the drive transmission device 1 according to the present invention can be made thin, and is small and lightweight, it can be used as a conventional belt without making a large structural change in the dryer. It can be applied instead.

Moreover, since the driving gear 5, the driven gear 6, the small gear 8 of the idle gear 7 and the large gear 9 are all made of resin, heat resistance and moisture resistance can be improved. Therefore, durability is not impaired even in a dryer used under high temperature and high humidity conditions, and stable performance can be obtained for a long period of time.

Further, since the resin gears are meshed with each other, the lubricity between the gears is improved, the noise can be reduced, and the inertial force is reduced. Therefore, when a gear train made of steel is used, In comparison, the drive source can be small, and the start-up is also good.

When the drive transmission device 1 is replaced, it can be easily replaced because it is only fixed to the main body case 16 with bolts or the like.

[0041]

Since the present invention is constructed as described above, it has the following effects. First, since the support shaft is not supported at both ends but only at the central portion, the overall thickness can be reduced, and the support shaft can be applied to a conventional dryer without making a large structural change. Moreover, the substrate is fixed to the central hole of the dryer body case to form a part of the body case, and the drive gear is connected to the dryer drum and the driven gear is connected to the dryer fan. Since it is sufficient, it can be easily attached and detached.
Also, since the rotation of the drum is transmitted to the fan via multiple gears, by setting the module of each gear, the number of teeth, etc. to appropriate values, the rotational force on the drum side is amplified at an appropriate ratio. Then, it can be transmitted to the fan side. In addition, since each gear is made of resin and has excellent heat resistance and moisture resistance, durability is not impaired even under severe operating conditions of high temperature and high humidity. Because of the engagement, the noise generation is small and the lubricity is good. Further, since the support shaft is provided in a state of penetrating the substrate, the driving gear is provided on one side and the driven gear is provided on the other side, the weights on both sides of the substrate can be balanced, and the weight balance is good, As a result, a large bending force does not act on the substrate, so that no special care is required when mounting.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a drive transmission device for a dryer fan according to the present invention.

FIG. 2 is a longitudinal sectional view of the one shown in FIG.

FIG. 3 is an end view of the support shaft of the one shown in FIG.

FIG. 4 is an explanatory diagram showing a positional relationship among components shown in FIG.

FIG. 5 is a vertical sectional view showing a drive transmission device of a dryer fan according to the present invention.

FIG. 6 is an explanatory diagram showing a positional relationship with each component of the one shown in FIG.

FIG. 7 is an explanatory diagram showing an example of a fan drive unit of a conventional dryer.

FIG. 8 is a schematic diagram of what is shown in FIG.

[Explanation of symbols]

1 ... Drive transmission device 2 ... Substrate (holder) 2a ... Mounting portion 2b, 2c, 2d, 4c, 5c, 6c, 6e, 9c, 1
0d ...... hole 3,33 ...... support shaft 3a ...... collar part 3b, 3c, 3d ...... screw part 4 ...... bush 4a ...... large diameter part 4b ...... small diameter part 5 ...... driving gear 5a, 6a, 8a , 9a ... Gear parts 5b, 8b, 9b, 17a, 18a ... Boss part 6 ... Driven gear 6b ... Bearing case 6d ... Collar part 7 ... Idle gear 8 ... Small gear 9 ... Large gear 10 …… Cover 10a …… Flange 10b …… Side plate 10c …… Notch 11 …… Nut 12,13 …… Washer 14,15 …… Retaining ring 16,34 …… Main body case 16a …… Central hole 16b …… Peripheral Hole 17, 27 ...... Drum 18, 28 ...... Fan 20, 26 ...... Drive motor 25 ...... Body 29 ...... Flat belt 30 ...... Round belt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisaya Matsui 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A support shaft (3) is arranged in a penetrating state on a substrate (2) which can be attached to a main body case (16) of a dryer,
A resin drive gear (5) is supported on a portion of the support shaft (3) located on one side of the substrate (2), and a driven gear (6) is supported on a portion of the support shaft (3) located on the other side. Then, the drive gear (5) is connected to the dryer drum (17) and the driven gear (6) is connected to the dryer fan (18), and further, the drive gear (5) is connected to the substrate (2). ) And the driven gear (6) for drivingly transmitting the idle gear (7) made of resin
A drive transmission device for a fan for a dryer, characterized by being provided with.