KR101393553B1

KR101393553B1 - Continuously variable transmission

Info

Publication number: KR101393553B1
Application number: KR1020140041786A
Authority: KR
Inventors: 유혁; 정태진; 안성철; 유문수
Original assignee: (주)엠비아이
Priority date: 2014-04-08
Filing date: 2014-04-08
Publication date: 2014-05-09
Also published as: WO2015156592A1

Abstract

In particular, the present invention relates to a continuously variable transmission, and more particularly to a continuously variable transmission that smoothly performs a continuously variable transmission with a simple structure through a conical friction wheel, and in particular, a compact structure is possible by arranging two pairs of conical friction wheels, The present invention relates to an apparatus for smoothly performing a continuously variable transmission without increasing slippage by greatly increasing the frictional force between the respective components by an elastic force acting independently from the center of the shaft 100 A driving unit 200 for receiving a rotational force and a driven unit 300 for outputting a rotational force; A driving side ring friction wheel 410 rotatably engaged with the driving part 200 and a driving side ring friction wheel 410 rotatably supported on a driving side carrier 420 fixed to the shaft 100, A driven side ring friction wheel 440 for outputting rotational force shifted by engagement with the driven portion 300 to the driven portion 300, Side conical friction wheels 460 rotatably supported on the follower side carrier 450 fixed to the driven side ring friction wheels 440 and frictionally contacting the inner circumferential surfaces of the driven side ring friction wheels 440, Side conical friction wheels 460 to transmit the rotational force of the driving-side conical friction wheels 430 to the driven-side conical friction wheels 460 and to move along the axial direction of the shaft 100 A transmission portion 400 made up of a possible sun friction wheel 470; And a control unit (500) for changing the axial position of the sun friction disc (470) relative to the shaft (100) in accordance with a shifting operation, wherein the two sets of conical friction discs opposed to each other are cross- The structure can be continuously variable without a shock to change the speed, thereby enhancing the merchantability. The elastic force acting independently from both sides toward the center greatly increases the frictional force between the respective components, thereby smoothly shifting the transmission smoothly without loss due to slippage. So that the transmission performance can be maximized.

Description

[0001] Continuously variable transmission [

The present invention relates to a continuously variable transmission, and more particularly, to a continuously variable transmission in which a continuously variable transmission is smoothly performed with a simple structure through a conical friction wheel, and in particular, two conical frictional wheels opposed to each other are cross- The present invention relates to a device for smoothly performing a continuously variable transmission without slip by significantly increasing the frictional force between each component by an elastic force acting independently toward the center, thereby enabling smooth shifting with high efficiency, .

Generally, the transportation devices such as a bicycle, a wheelchair, a car, a scooter, a motorcycle, and a ship which are driven by various driving forces such as an electric power or the like are provided to improve driving performance of an overall industrial device, Is provided.

Such a transmission is shifted to a multi-stage from high speed to low speed according to the operation of a passenger or a user so that torque or speed required according to the driving environment can be obtained.

In recent years, a planetary gear set including a sun gear, a planetary gear, a ring gear, and a carrier is provided in the hub shell so as to change the speed in multiple steps and prevent the gear from being exposed to the outside.

However, the transmission using the planetary gear set has a smaller number of speed change stages than a complicated structure, and in particular, the control of the pawl strongly restrained by the drive load at the time of shifting operation in the load drive running state is not smooth, There was a technical problem.

A continuously variable transmission is being developed as an alternative to a transmission using a planetary gear set having such a problem. Continuously variable transmission (CVT) refers to a transmission capable of freely changing the speed ratio continuously without regard to a predetermined speed change stage .

However, since the continuously variable transmission is bulky compared to the conventional gear type transmission, it is required to output the rotational force by shifting the rotational force based on the frictional force. Therefore, when a large load is applied, durability is degraded. There has been a problem in the prior art.

Disclosure of the Invention The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a continuously variable transmission which is capable of performing continuously variable shifting with a more compact structure by mutually arranging two conical frictional wheels opposed to each other, The friction force between the respective components is greatly increased by the elastic force acting independently on the basis of the elastic force acting on the friction member, so that smooth shifting can be performed with high efficiency without loss due to slipping, thereby maximizing the shifting performance.

The present invention relates to a vehicle including a shaft fixed to both ends of a vehicle body, a driven portion rotatably supported independently of the shaft, a driven portion receiving a rotational force, and a driven portion for outputting a rotational force; A drive-side ring friction wheel rotatably engaged with the drive unit, a drive-side conical friction wheel rotatably supported by a drive-side carrier fixed to the shaft and in frictional contact with an inner circumferential surface of the drive-side ring friction wheel, And a driven side ring friction wheel rotatably supported by the follower side carrier fixed to the shaft and frictionally contacting the inner side surface of the driven side ring friction disc to the driven side side friction friction wheel, Side conical friction wheels and the driven-side conical friction wheels so as to transmit the rotational force of the drive-side conical friction wheels to the driven-side conical friction wheels, the sun friction lanes being movable along the axial direction of the shaft, ; And a control portion for changing the axial position of the sun friction wheel relative to the shaft in accordance with the shift operation.

In this case, a plurality of drive-side conical friction wheels and driven-side conical friction wheels are disposed at radially equidistant intervals on the drive-side carrier and the driven-side carrier of the transmission portion, and the drive-side conical friction wheels and the driven- Wherein a bus bar closest to said shaft is disposed parallel to said shaft; Wherein the driving side carrier and the driven side carrier are disposed opposite to each other with a phase angle difference therebetween so that a bus line closest to the shaft in the driving side conical friction wheels and the driven side conical friction wheels are overlapped in a predetermined section in the axial direction It is better to be placed.

The drive-side conical friction wheels gradually increase in diameter along the direction away from the support position of the drive-side carrier and are frictionally contacted with the inner circumferential surface of the drive-side ring friction wheels, And a driving side output frictional surface frictionally contacting the outer circumferential surface of the sun friction disc; Wherein the driven side conical friction wheels are gradually reduced in diameter along the direction away from the support position of the driven side carrier and frictionally contacted with the inner peripheral surface of the driven side ring friction wheels in frictional contact with the driven side, And a driven side input friction surface frictionally contacting the outer circumferential surface of the sun friction disk.

The driving-side ring friction wheel is rotatably supported on the outer peripheral surface of the shaft through a driving-side movable bearing, and the driving-side movable bearing is elastically supported in the axial direction of the shaft, so that the inner peripheral surface of the driving- Increasing the frictional force between the driving-side input friction surfaces of the drive-side conical friction wheels; Wherein the driven side ring friction wheel is rotatably supported on an outer peripheral surface of the shaft through a driven side movable friction bearing, the driven side movable friction bearing is elastically supported in the axial direction of the shaft opposing the drive side ring friction wheel, It is preferable to increase the frictional force between the inner circumferential surface of the ring friction car and the output side frictional surface of the follower side frictional wheel.

In addition, the control unit may include a control shaft that moves in the axial direction of the shaft according to a shift operation, a control ring connected to the control shaft and rotatably supporting the sun friction wheel through a two row bearing, It is preferable to include a return spring for elastically supporting the spring in one direction.

In addition, the driving unit may include a sprocket that receives rotational force from the chain and rotates, and a driver that is coupled to the sprocket and integrally rotates and mates with the driving-side ring friction wheels.

Finally, it is preferable that the follower includes a hub shell for outputting shifted rotational force, and a one-way clutch provided between the hub shell and the driven side ring friction wheel.

The present invention as described above is capable of performing continuously variable shifting without a shifting shock by arranging two conical frictional wheels opposed to each other so as to be superimposed on each other so as to be more compact so as to enhance the commerciality and to improve the elasticity acting independently from both sides toward the center The frictional force between the respective components can be greatly increased to smoothly perform the shifting at a high efficiency without loss due to slipping, thereby maximizing the shifting performance.

1 is a perspective view showing a continuously variable transmission according to the present invention,
2 is a front sectional view showing the continuously variable transmission of the present invention,
3 is a perspective view of the hub shell of the continuously variable transmission according to the present invention,
4 is a perspective view of the driver in the continuously variable transmission of the present invention,
5 is a perspective view of the one-way clutch disassembled in the continuously variable transmission of the present invention,
6 is a perspective view of a continuously variable transmission according to the present invention in which a driven side ring friction disc, a driven side carrier, a driven side conical friction disc,
7 is a perspective view of the drive side ring friction disk, the drive side carrier, and the drive side conical friction disk in the continuously variable transmission according to the present invention,
FIG. 8 is a perspective view of the sun friction disc and the control section of the continuously variable transmission according to the present invention,
9 is an enlarged cross-sectional view of the main portion when the continuously variable transmission of the present invention performs the acceleration shifting,
10 is an enlarged cross-sectional view of the main portion when the continuously variable transmission of the present invention does not perform shifting,
11 is an enlarged cross-sectional view of a substantial part in the case where the continuously variable transmission of the present invention performs the decelerated shifting.

FIG. 1 is a perspective view showing a continuously variable transmission according to the present invention, and FIG. 2 is a front sectional view showing a continuously variable transmission according to the present invention.

Fig. 4 is a perspective view of the continuously variable transmission of the present invention in which the driver is disassembled. Fig. 5 is a perspective view of the one-way clutch in the continuously variable transmission of the present invention. Fig. FIG.

Fig. 6 is a perspective view of the continuously variable transmission according to the present invention in which the driven side ring friction disk, the driven side carrier, and the driven side conical friction disk are disassembled. Fig. Side carrier and a drive-side conical friction wheel, and Fig. 8 is a perspective view in which the sun friction disc and the control unit are disassembled in the continuously variable transmission of the present invention.

Fig. 9 is an enlarged cross-sectional view of a substantial part in the case where the continuously variable transmission of the present invention performs acceleration shifting, Fig. 10 is an enlarged sectional view of a substantial part in the case where the continuously variable transmission of the present invention does not perform shifting, Is an enlarged cross-sectional view of the main portion in the case of performing the deceleration shifting.

1 to 11, the continuously variable transmission of the present invention is configured such that two conical frictional wheels opposed to each other are arranged in an axial direction so as to overlap with each other in a predetermined section so as to be more compact than a conventional continuously variable transmission, The friction force between the respective components is greatly increased by the elastic force acting independently from the both sides toward the center so that the shift can be smoothly performed at high efficiency without loss due to slippage.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2, a continuously variable transmission according to the present invention includes a shaft 100 fixed to both ends of a vehicle body, a driving unit 200 that is rotatably supported independently of the shaft 100 and receives a rotational force, A driven part 300 for outputting a driving signal; A driving side ring friction wheel 410 rotatably engaged with the driving part 200 and a driving side ring friction wheel 410 rotatably supported on a driving side carrier 420 fixed to the shaft 100, A driven side ring friction wheel 440 for outputting rotational force shifted by engagement with the driven portion 300 to the driven portion 300, Side conical friction wheels 460 rotatably supported on the follower side carrier 450 fixed to the driven side ring friction wheels 440 and frictionally contacting the inner circumferential surfaces of the driven side ring friction wheels 440, Side conical friction wheels 460 to transmit the rotational force of the driving-side conical friction wheels 430 to the driven-side conical friction wheels 460 and to move along the axial direction of the shaft 100 A transmission portion 400 made up of a possible sun friction wheel 470; And a control unit 500 for changing the axial position of the sun friction disc 470 with respect to the shaft 100 according to a shift operation.

That is, the continuously variable transmission of the present invention comprises a shaft 100, a driving unit 200, a follower unit 300, a transmission unit 400, and a control unit 500.

First, the shaft 100 is fastened to the body of a scooter, a bicycle, a rickshaw, or the like (hereinafter referred to as a "traveling device") requiring shifting, with fastening means 101, 102, So as to be non-rotatable.

At this time, the shaft 100 is formed to have different diameters according to the axial position, and the left side in the drawing is a solid shaft, while the right side in the drawing is a hollow shaft so that the control unit 500, consist of.

The shaft 100 is a skeleton of the present invention, and all components to be described below are rotatably or non-rotatably provided on the outer circumference of the shaft 100.

The driving unit 200 and the driven unit 300 are independently rotatable on the shaft 100. The driving unit 200 drives the driving unit 200 and the driven unit 300 such that the rotational force, And the follower unit 300 is configured to output the rotational force to the wheels of the traveling device.

2 and 4, a cone ring 103 coupled to the shaft 100 and a cone ring 103 coupled to the shaft 100 to prevent the cone ring 103 from being separated from the inner peripheral surface of the right side of the driving unit 200 A driving nut 101 is fixed to the shaft 100 and a driving side main bearing 105 supported by the cone 103 is installed on the shaft 100. The driving unit 200 is rotatable independently from the shaft 100 .

In particular, the driving unit 200 includes a sprocket 210 that rotates by receiving a rotational force through a chain, a driver (not shown) that rotates integrally with the sprocket 210 and transmits a rotational force to a transmission unit 400 (220).

As a result, the sprocket 210 receives driving force from the outside through a power transmitting means such as a chain, for example, and rotates the driver 220 integrally.

The follower 300 located at the outermost portion of the shaft 100 has a conical ring 106 coupled to the shaft 100 as shown in Figures 2 and 3 on the left inner circumferential surface in the figure, And a follower side main bearing 108 supported by the cone ring 106. The follower portion 300 is also provided with the shaft 100 As shown in Fig.

In particular, the follower 300 includes a hub shell 310 for outputting a rotational torque transmitted from the hub shell 310 and a one-way clutch 320 provided between the hub shell 310 and a transmission portion 400 to be described later .

The hub shell 310 is formed in a substantially cylindrical shape. A plurality of holes 311 can be formed on the outer periphery of the hub shell 310 to connect wheel fingers. Various components can be inserted into the holes 311.

Here, the one-way clutch 320 is a mechanical element that transmits rotational force only in one direction. The one-way clutch 320 includes an inner ring 321 connected to the transmission portion 400 to be described later and rotated as shown in FIG. 5, A plurality of rollers 322 disposed in the one-way inclined groove 321a and a plurality of rollers 322 disposed on the outer periphery of the inner ring 321, (323) and an outer ring (324) connected to the inner circumferential surface of the hub shell (310).

As a result, when the rotational speed of the inner wheel 321 located inside the one-way clutch 320 is faster than the rotational speed of the outer wheel 324 located outside, the one- Directional inclined groove 321a and the inner circumferential surface of the outer ring 324 to transmit the rotational force of the inner ring 321 located on the inner side to the hub shell 310 through the outer ring 324 positioned on the outer side .

On the other hand, when the rotational speed of the inner ring 321 located on the inner side of the one-way clutch 320 is slower than the rotational speed of the outer ring 324 located on the outer side, the roller 322 merely has the unidirectional inclined groove 321a The rotational force of the inner ring 321 located on the inner side can not be transmitted to the outer ring 324 positioned on the outer side.

Therefore, only when the rotational speed of the driven power transmitted from the transmission portion 400 is higher than the rotational speed of the traveling device, the driven power is output. If the inertial running or the downhill traveling speed of the traveling device is changed The rotation of the hub shell 310 is not reversed to the inside of the continuously variable transmission according to the present invention.

Reference numeral 109 denotes a connecting bearing provided between the driver 220 of the driving unit 200 and the hub shell 310 of the follower unit 300. The connecting bearing 109 connects the driving unit 200 and the driver 220 of the follower unit 300 rotate independently of each other.

Reference numeral 110 denotes a dust cover which prevents foreign matter such as dust from entering between the driver 220 of the driving unit 200 and the hub shell 310 of the follower unit 300.

Next, a description will be made of the speed change portion 400, which is the core of the present invention.

The transmission portion 400 is provided with two pairs of conical friction wheels opposed to each other and is divided into a driven side on the right side in the drawing for receiving the driving force and a driven side on the left side in the drawing for outputting the shifted driven force.

The drive side of the transmission portion 400 includes a drive side ring friction wheel 410 and a drive side conical friction wheel 430.

2, the right side outer peripheral surface of the driving side ring friction wheel 410 is engaged with the left inner peripheral surface of the driver 220 of the driving unit 200 and rotates together with the rotation of the driver 220. [

The driving side ring friction wheel 410 is rotatably supported on a driving side carrier 420 fixed to the shaft 100 and rotatably supported on an inner peripheral surface of the driving side ring friction wheel 410, Side conical friction wheels 430 are provided.

A plurality of key grooves 421 are formed at the center of the drive-side carrier 420 as shown in FIG. 7, and a plurality of keys 422 corresponding to the key grooves 422 are assembled to the shaft 100 as shown in FIG. 8 The drive-side carrier 420 is not rotatable on the shaft 100.

The drive side conical friction plate 430 is rotatably supported on the drive side carrier 420 through a support shaft 423 and a bearing 424 as shown in FIG.

Accordingly, when the driving side ring friction wheel 410 rotates, the driving side conical friction wheel 430 supported by the driving side carrier 420 rotates.

The driven side of the transmission portion 400 so as to be symmetrical with the drive side includes a driven side ring friction disc 440 and a driven side conical friction disc 460.

The driven side ring friction wheel 440 is engaged with the right side inner peripheral surface of the one-way clutch 320 provided on the above-described driven portion 300 as shown in FIG. 2, And transmits the rotational force to the one-way clutch 320 side.

The inner side of the driven side ring friction wheel 440 is rotatably supported on the follower side carrier 450 fixed to the shaft 100 and is in contact with the inner side surface of the follower side ring friction wheel 440, An east side conical friction wheel 460 is provided.

At this time, a plurality of keyways 451 are formed in the center of the follower side carrier 450 as shown in FIG. 6, and a plurality of keys 452 corresponding thereto are assembled to the shaft 100, (450) is not rotatable on the shaft (100).

The driven side conical friction wheel 460 is rotatably supported on the driven side carrier 450 through a support shaft 453 and a bearing (not shown).

Accordingly, when the driven-side conical friction wheels 460 supported by the driven-side carrier 450 rotate, the driven-side ring friction wheels 440 rotate.

At the same time, the inner side between the driving side conical friction wheel 430 and the driven side conical friction wheel 460 contacts the driving side conical friction wheel 430 and the driven side conical friction wheel 460 at the same time, A sun friction wheel 470 for transmitting the rotational force of the drive-side conical friction wheels 430 to the driven-side conical friction wheels 460 is provided.

The sun friction wheel 470 is rotatably supported on the outer periphery of the shaft 100 and movable along the axial direction of the shaft 100.

Accordingly, the diameter in contact with the drive-side conical friction wheels 430 and the diameter in contact with the driven-side conical friction wheels 460 vary according to the axial position of the sun friction vehicle 470, .

For example, when the position of the sun friction wheel 470 moves to the right in the drawing as shown in FIG. 9, the contact diameter of the drive-side conical friction wheel 430 becomes large, The contact diameter of the contact portion 460 will be reduced.

As a result, the driven-side conical friction wheels 460 rotate faster than the rotational speed of the drive-side conical friction wheels 430, thereby achieving an accelerating shift.

When the position of the sun friction disc 470 moves to the center in the drawing as shown in Fig. 10, the contact diameter of the drive-side conical friction disc 430 and the contact of the follower side conical friction disc 460 The diameters become equal.

As a result, the rotational speed of the driving-side conical friction wheels 430 and the rotational speed of the driven-side conical friction wheels 460 are equal to each other, thereby outputting without shifting.

On the other hand, when the position of the sun friction disc 470 moves to the left in the drawing as shown in Fig. 11, the contact diameter of the drive side conical friction disc 430 becomes small, The contact diameter of the contact portion 460 will increase.

As a result, the driven-side conical friction wheels 460 rotate more slowly than the rotational speed of the drive-side conical friction wheels 430, thereby achieving the decelerating shift.

In this manner, in accordance with the axial position control of the sun friction vehicle 470, the transmission 400 such as the continuously variable transmission according to the present invention changes speedily, such as acceleration or deceleration, The control unit 500 will be described in detail below.

More specifically, in the present invention, a plurality of driving-side conical friction wheels 430 and a driven-side conical friction wheels 460 are provided on the driving-side carrier 420 and the driven-side carrier 450 of the transmission portion 400, And a bus bar closest to the shaft 100 in the driving-side conical friction wheels 430 and the driven-side conical friction wheels 460 is disposed on the shaft 100 as shown in FIG. 7, ; The drive side carrier 420 and the follower side carrier 450 are opposed to each other with a phase angle difference and the drive side conical friction plate 430 and the driven side conical friction plate 460 100 are arranged so as to be overlapped with each other in a predetermined section in the axial direction.

In other words, in the present invention, the driving-side conical friction plates 430 and the driven-side conical friction plates 460 may be provided separately, but preferably two or more are preferable. Side carrier 420 and the driven-side carrier 450 are provided with six drive-side conical friction wheels 430 and follower-side conical friction wheels 460, respectively.

As a result, the six drive-side conical friction wheels 430 provided on the drive-side carrier 420 are separated from the six driven-side conical friction wheels 460 provided on the driven-side carrier 450 Respectively.

In addition, the driving-side conical friction wheels 430 are supported on the driving-side carrier 420 with a predetermined inclination angle toward the center of the shaft 100, and the shaft- 100 are disposed in parallel with the shaft 100. The shaft 100 is disposed in the vicinity of the shaft 100,

The driven side conical friction wheels 460 are likewise supported by the driven side carrier 450 at a predetermined inclination angle toward the center of the shaft 100, 100 are disposed in parallel with the shaft 100. The shaft 100 is disposed in the vicinity of the shaft 100,

Accordingly, it becomes possible to transmit the rotational force of the driving-side conical friction wheel 430 to the driven-side conical friction wheel 460 by the sun friction car 470 moving linearly along the shaft 100.

Here, a bus line closest to the shaft 100 among the busbars of the driving-side conical friction plate 430 and the driven-side conical friction plate 460 is disposed so as to be overlapped in a predetermined section in the axial direction, Side conical friction wheels 460 are positioned between the conical friction wheels 430 and the driven-side conical friction wheels 460, that is, between the driven-side conical friction wheels 430 , It becomes possible to configure the continuously variable transmission of the present invention to be more compact than the conventional one.

9, the diameter of the driving-side conical friction wheel 430 is gradually increased along the direction away from the supporting position of the driving-side carrier 420, And a driving side output friction surface 432 whose diameter is gradually reduced and in frictional contact with the outer circumferential surface of the sun friction disc 470; The driven-side conical friction wheels 460 are gradually expanded in diameter along the direction away from the supporting position of the driven-side carrier 450, so that the driven-side conical friction wheels 460 are driven in a frictional contact with the inner peripheral surface of the driven- And a driven side input friction surface 462 whose diameter is gradually reduced and in frictional contact with the outer circumferential surface of the sun friction disc 470.

That is, by separating the driving-side input friction surface 431 and the driving-side output friction surface 432 in the driving-side conical friction plate 430, the driving-side input friction surface 431 is separated from the driving- And the driving side output friction surface 432 contacts the sun friction wheel 470 to output a rotational force.

Similarly, the driven side output friction surface 461 and the driven side input friction surface 462 are also distinguished from each other on the driven side conical friction wheels 460 so that the driven side output friction surface 461 is in contact with the driven side ring friction surface 461 And the driven side input friction surface 462 comes into contact with the sun friction wheel 470 to receive the rotational force.

As described above, the input friction surface and the output friction surface are separately formed in the drive-side conical friction plates 430 and the driven-side conical friction plates 460, so that input and output can be made more accurate.

In the continuously variable transmission of the present invention, the driving-side ring friction wheel 410 is rotatably supported on the outer peripheral surface of the shaft 100 through the driving-side movable bearing 111 as shown in FIGS. 2 and 7, The driving side movable bearing 111 is elastically supported in the axial direction of the shaft 100 to engage with the inner peripheral surface of the driving side ring friction wheel 410 and the driving side input friction surface 431 of the driving side conical friction wheel 430, Thereby increasing the frictional force therebetween; The driven side ring friction wheel 440 is rotatably supported on the outer peripheral surface of the shaft 100 through a driven side movable bearing 113 as shown in FIGS. 2 and 6, Side ring friction disc 440 and the output side frictional surface 460 of the driven-side conical friction disc 460 and the output-side frictional surface 460 of the driven-side disc friction disc 460 are elastically supported in the axial direction of the shaft 100, It is preferable to increase the frictional force between the first and second flanges 461.

A drive side movable bearing 111 is provided between the inner peripheral surface of the driving side ring friction wheel 410 and the outer peripheral surface of the shaft 100 to rotate the driven side ring friction wheel 410 on the shaft 100. [ The movable side movable bearing 111 is elastically supported toward the center side by a fixing nut 115 and a plurality of leaf springs 112.

As a result, a strong frictional force is generated between the inner circumferential surface of the driving side ring friction wheel 410 and the driving side input friction surface 431 of the driving side conical friction wheel 430, Side cone friction disc 430 to the drive-side cone friction disc 430 more reliably.

Similarly, a driven side movable bearing 113 is provided between the inner peripheral surface of the driven side ring friction wheel 440 and the outer peripheral surface of the shaft 100 to rotate the driven side ring friction wheel 440 on the shaft 100 And the driven side movable bearing 113 is elastically supported toward the center side by a fixing nut 116 and a plurality of leaf springs 114.

As a result, a strong frictional force is generated between the inner circumferential surface of the driven-side ring friction wheel 440 and the driven-side output friction surface 461 of the driven-side conical friction wheel 460, whereby the driven-side conical friction wheels 460 To the driven side ring friction wheels 440 more securely.

The driving side ring friction wheel 410 and the driving side conical friction wheel 430 are controlled in accordance with the amount of engagement of the fixing nuts 115 and 116 and the number and angle of inclination of the leaf springs 112 and 114, And the frictional force between the driven-side ring friction disc 440 and the driven-side conical friction disc 460 can also be increased or decreased.

Not only the contact force with the drive side conical friction wheel 430 is increased by the force of the drive side ring friction wheel 410 moving to the left side but also the drive side output friction surface of the drive side conical friction wheel 430 The frictional force between the sun gear 432 and the sun friction disc 470 also increases and the same effect is obtained on the driven side symmetrically arranged.

The hub shell 310 of the above-described driven portion 300 is filled with working oil so that the transmission portion 400 always operates in the working oil.

Finally, the control unit 500 is configured to change the axial position of the sun friction disc 470 with respect to the shaft 100 according to the shift operation of the user or the passenger. In accordance with the operation of the shift lever, A variety of configurations for moving the light source 470 in a straight line can be applied.

For example, the shift lever may be converted into a rectilinear motion and directly transmitted through a mechanical element such as a cable, or may be converted into a rectilinear motion through a rotational motion in the middle.

8, the control unit 500 includes a control shaft 510 that moves in the axial direction of the shaft 100 according to a shift operation, and a control shaft 510 that is connected to the control shaft 510, A control ring 530 for rotatably supporting the sun friction wheel 470 via a return spring 531 and a return spring 540 for elastically supporting the control ring 530 in one direction.

At this time, the control shaft 510 moves in the axial direction according to the shift operation, and is located inside the right hollow of the shaft 100 in the drawing.

The inner circumferential surface of the sun friction wheel 470 is rotatably supported on the outer circumferential surface of the control ring 530 through the two row bearings 531 and the control ring 530 may be divided as shown in FIG. .

The control ring 530 is connected to the distal end of the control shaft 510 through fastening means such as a pin 520.

Accordingly, the control shaft 510, the control ring 530, the two-row bearing 531, and the sun friction disc 470 are moved in the axial direction together in accordance with the shift operation.

At this time, it is preferable that a slot is formed in the shaft 100 so that the pin 520 can penetrate and move only in the axial direction.

2, the return spring 540 is a coil spring provided between the follower side carrier 450 and the control ring 530, and the control ring 530 is connected to the follower side carrier 450 And is elastically supported so as to move to the upper right side.

As a result, the control shaft 510 maintains the state of being moved to the right side in the drawing by the return spring 540 when there is no separate shifting operation, and the return spring 540 is compressed The control shaft 510 is moved to the left in the drawing.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 1 to 11. FIG.

The continuously variable transmission of the present invention constructed as described above is provided in the traveling device and performs the shifting in an endless manner according to the shifting operation, and the respective shifting will be described separately.

- Acceleration status

The control shaft 510 of the control unit 500, the control ring 530, and the sun friction disc 470 are moved to the right in the drawing as shown in FIG. 9 by the return spring 540 because there is no separate shift operation in the acceleration state It is a state.

In this state, when the rotational force is transmitted to the sprocket 210 of the driving unit 200 through the power transmitting means such as a chain, the transmitted rotational force is inputted to the transmission unit 400 through the driver 220.

When the driving side ring friction wheel 410 of the transmission portion 400 rotates, the inner circumferential surface of the driving side ring friction wheel 410 contacts the driving side input friction surface 431 of the driving side conical friction wheel 430 The driving side conical friction wheel 430 is rotated about the supporting shaft 423 on the driving side carrier 420 fixed to the shaft 100. [

The rotational force of the drive side conical friction wheel 430 is transmitted to the sun friction wheel 470 through the drive side output friction surface 432 and is transmitted to the driven side input friction surface 462 of the driven side conical friction wheel 460 again. Side conical friction wheels 460 rotate about the support shaft 453 on the follower side carrier 450 fixed to the shaft 100. [

Thus, when the rotational force of the drive-side conical friction wheel 430 is transmitted to the driven-side conical friction wheel 460 via the sun friction wheel 470, the sun friction wheel 470 is driven by the drive- 430), while being brought into contact with the small contact diameter of the driven-side conical friction wheels 460, whereby an accelerating shift is made.

Then, the rotational force of the driven-side conical friction wheels 460 is transmitted to the driven-side ring friction wheels 440 through the driven-side output friction surface 461, and the rotational force of the driven- And is transmitted to the hub shell 310 through the clutch 320 and is output.

The rotation of the hub shell 310 is transmitted to the wheels of the traveling device and used as a driving source of the traveling device.

At this time, in the one-way clutch 320, when the rotational speed shifted by the transmission portion 400 is higher than the rotational speed of the hub shell 310, the shifted rotational force is output through the one-way clutch 320 On the other hand, when the rotational speed shifted as in the downhill or inertial traveling is slower than the rotational speed of the hub shell 310, the reverse rotation of the one-way clutch 320 is idle and is not reversed.

As a result, the rotational speed of the driving unit 200 is accelerated by the speed change unit 400 and is output to the driven unit 300.

- Medium (no shift) status

The control shaft 530 and the sun friction wheel 470 of the control unit 500 are moved to the center of the drawing as shown in FIG. 10 while the return spring 540 is being compressed by the shifting operation State.

In this state, the order of transferring the rotational force is the same as the above-described acceleration state, so that redundant description will be omitted.

When the rotational force of the drive-side conical friction wheel 430 is transmitted to the driven-side conical friction wheel 460 via the sun friction wheel 470, the sun friction wheel 470 is driven by the drive-side conical friction wheel 430 Side contact cone friction wheel 460 and comes into contact with the intermediate contact diameter of the driven-side conical friction wheel 460, so that no separate shift is made.

As a result, the rotational speed of the driving unit 200 is output from the transmission unit 400 to the driven unit 300 without shifting.

- deceleration state

In the decelerating state, the return spring 540 is further compressed by the shifting operation so that the control shaft 510 of the control unit 500, the control ring 530, and the sun friction disc 470 are moved to the left in the drawing as shown in FIG. It is a state.

In this state, the order of transmission of the rotational force is the same as the acceleration state and the middle-speed state described above, so that redundant description will be omitted.

When the rotational force of the drive-side conical friction wheel 430 is transmitted to the driven-side conical friction wheel 460 via the sun friction wheel 470, the sun friction wheel 470 is driven by the drive-side conical friction wheel 430 Side contact conical friction wheels 460, while being in contact with a large contact diameter of the driven-side conical friction wheels 460, the deceleration is achieved.

As a result, the rotational speed of the driving unit 200 is reduced in the speed change unit 400 and then output to the driven unit 300. [

Therefore, the continuously variable transmission of the present invention performs the shifting unrestrictedly using two pairs of conical friction wheels that are basically opposed to each other, so that the shifting shock occurring in the conventional multi-speed transmission using the planetary gear set and the shift impossibility There is an excellent advantage that no phenomenon occurs at all.

In addition, since the two sets of conical friction wheels are arranged in an intersecting relation with each other with a predetermined phase angle difference, a more compact structure than the conventional continuously variable transmission is also possible.

Particularly, the present invention has an excellent advantage in that the frictional force between the components is further increased by using the elastic force acting independently from the left and the right, thereby achieving high shifting performance without power loss due to slipping.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the scope of the present invention is not limited to the above drawings or embodiments.

100: Shaft
101, 102, 104, 107, 115, 116: fixed nut
103, 106: cone ring 105: drive side main bearing
108: driven side main bearing 109: connecting bearing
110: dust cover 111: drive side movable bearing
112, 114: leaf spring 113: driven side movable bearing
200: driving part 210: sprocket
220: Driver 300:
310: hub shell 311: hole
320: one-way clutch 321: inner ring
321a: Unidirectional inclined groove 322: Roller
323: Cage 324: Outer ring
400: transmission portion 410: driving side ring friction wheel
420: driving side carrier 421, 451: keyway
422, 452: key 423, 453:
424: Bearing 430: Driving side conical friction wheel
431: driving side input friction surface 432: driving side output friction surface
440: driven side ring friction disk 450: driven side carrier
460: Servomotor friction disc 461: Output side frictional side
462: a driven side input friction surface 470: a sun friction wheel
500: control unit 510: control axis
520: pin 530: control ring
531: 2 column bearing 540: return spring

Claims

A driven portion rotatably supported on the shaft independently of the shaft, the drive portion receiving a rotational force and the driven portion outputting a rotational force;
A drive-side ring friction wheel rotatably engaged with the drive unit, a drive-side conical friction wheel rotatably supported by a drive-side carrier fixed to the shaft and in frictional contact with an inner circumferential surface of the drive-side ring friction wheel, And a driven side ring friction wheel rotatably supported by the follower side carrier fixed to the shaft and frictionally contacting the inner side surface of the driven side ring friction disc to the driven side side friction friction wheel, Side conical friction wheels and the driven-side conical friction wheels so as to transmit the rotational force of the drive-side conical friction wheels to the driven-side conical friction wheels, the sun friction lanes being movable along the axial direction of the shaft, ;
And a control portion for changing an axial position of the sun friction wheel relative to the shaft in accordance with a shift operation.

2. The automatic transmission according to claim 1, wherein a plurality of drive-side conical friction wheels and driven-side conical friction wheels are disposed at radially equidistant intervals on the drive-side carrier and the driven-side carrier of the transmission portion, A bus bar closest to the shaft of the friction wheel is disposed parallel to the shaft;
Wherein the driving side carrier and the driven side carrier are disposed opposite to each other with a phase angle difference therebetween so that a bus line closest to the shaft in the driving side conical friction wheels and the driven side conical friction wheels are overlapped in a predetermined section in the axial direction And the second clutch is disengaged.

3. The planetary gearset according to claim 2, wherein the drive-side conical friction wheels have driving-side input friction surfaces that are gradually expanded in diameter in a direction away from the support position of the drive-side carrier and frictionally contact the inner circumferential surface of the drive- And a driving-side output frictional surface gradually reduced in diameter and in frictional contact with an outer circumferential surface of the sun friction disc;
Wherein the driven side conical friction wheels are gradually reduced in diameter along the direction away from the support position of the driven side carrier and frictionally contacted with the inner peripheral surface of the driven side ring friction wheels in frictional contact with the driven side, And a driven side input friction surface frictionally contacting the outer peripheral surface of the sun friction vehicle.

The drive-side ring friction device according to claim 3, wherein the drive-side ring friction wheel is rotatably supported on an outer circumferential surface of the shaft via a drive-side movable bearing, the drive-side movable bearing is elastically supported in the axial direction of the shaft, To increase the frictional force between the inner peripheral surface of the conical friction plate and the driving-side input friction surface of the drive-side conical friction plate;
Wherein the driven side ring friction wheel is rotatably supported on an outer peripheral surface of the shaft through a driven side movable friction bearing, the driven side movable friction bearing is elastically supported in the axial direction of the shaft opposing the drive side ring friction wheel, And increases frictional force between the inner circumferential surface of the ring friction wheel and the output side friction surface of the follower friction wheel of the driven side.

The control system according to claim 4, wherein the control unit includes: a control shaft that moves in an axial direction of the shaft in accordance with a shift operation; a control ring connected to the control shaft and rotatably supporting the sun friction wheel through a two- And a return spring for elastically supporting the control ring in one direction.

6. The continuously variable transmission as set forth in claim 5, wherein the driving unit includes a sprocket that rotates by receiving a rotational force through a chain, and a driver which rotates integrally with the sprocket and meshes with the driving-side ring friction wheel.

7. The continuously variable transmission as set forth in claim 6, wherein the follower includes a hub shell for outputting a rotational torque, and a one-way clutch provided between the hub shell and the follower ring friction wheel.