JP2001012571A - Inclination suppressing device and continuously variable transmission using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress, with simple structure, the inclination of a movable flange of a continuously variable transmission. SOLUTION: This inclination suppressing device 6 comprises a roller holder 49 and a plurality of pair of rollers 46 and 47. The roller holder 49 can be reciprocated between a drive pulley and a driven pulley. The plurality of pair of rollers 46 and 47 are installed on the roller holder 49 so as to be rotatable about an axis in parallel with the rotating shafts of the drive and driven pulleys 2 and 3. The pair of rollers 46 and 47 are allowed to abut on a fixed flange 11 and a movable flange 16, and the pair of rollers 47 are allowed to abut on the fixed flange 21 and the movable flange 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suppressing the inclination of a movable flange in a continuously variable transmission.

[0002]

2. Description of the Related Art For example, there is a V-belt type continuously variable transmission as a continuously variable transmission used for a vehicle. The V-belt type continuously variable transmission mainly includes a driving pulley, a driven pulley, and an endless belt wound between the pulleys. Each pulley has a fixed flange fixed to the shaft, and a movable flange engaged with the shaft so as to be non-rotatable and movable in the axial direction. The movable flange can be moved toward or away from the fixed flange by a hydraulic chamber connected to a hydraulic operating mechanism. Each of the fixed flange and the movable flange has a cone-shaped inclined surface on the side facing each other. Thereby, a V-shaped groove is formed between both pulleys.

[0003] The endless belt is composed of, for example, a large number of elements made of metal and a metal belt for holding each element. Many of the elements have inclined surfaces that can be in close contact with the V-shaped grooves of the driving pulley and the driven pulley. In this way, when the driving pulley rotates, a number of elements are pushed together to operate, and torque is transmitted to the driven pulley.

[0004] In the shifting operation, the movable flange of each pulley is moved in the axial direction by hydraulic operation. By this operation, the mounting radius of the endless belt to each pulley changes, and accordingly, the gear ratio changes steplessly. The above operation is performed while balancing the pressures of the movable flange on the driving side and the movable flange on the driven side.

[0005]

The torque transmission between each pulley and the endless belt is performed by sandwiching both side surfaces of the endless belt between a fixed flange and a movable flange. Here, the coefficient of friction between many elements of the endless belt and the fixed and movable flanges is 0.08 to 0.12.
Due to the low degree, the pressing force of the flange against the element needs to be sufficiently large. However, since the endless belt is in contact only with a part of each flange, the movable flange is easily inclined with respect to the shaft and the fixed flange. Specifically, a part of the movable flange (the side close to the other pulley) is inclined so as to approach the fixed flange.

When the movable flange is tilted, the following problems occur. First, the endless belt causes misalignment (misalignment) with respect to the rotation axis of each pulley. Second, torque transmission is reduced due to the reduced frictional engagement surface due to the mismatch of the contact angle between the flange and the metal element. In addition, unnecessary sliding (friction loss) between the element and the flange increases, thereby increasing wear of each member. Third, in order to solve the above-mentioned problem, it is necessary to further increase the hydraulic pressure supplied from the hydraulic pump to the hydraulic chamber to increase the force for clamping the element by the flange, but the driving loss of the hydraulic pump increases. ,
Further, a high tensile force acts on the metal belt portion of the endless belt, thereby shortening the service life.

As means for solving the above-mentioned problems,
For example, as disclosed in Japanese Patent Application Laid-Open No. H11-30301, there is disclosed a structure in which a support roller for suppressing the inclination of a movable pulley is provided between a driving pulley and a driven pulley in an endless belt. This support roller transmits torque between the driving pulley and the driven pulley, and can adjust the contact pressure with fluid pressure to generate an appropriate reaction force when sandwiched between the movable pulley and the fixed pulley Function.

However, the above-mentioned support roller has a complicated structure, requires a large space, and requires a special system for supplying hydraulic pressure to the support roller. An object of the present invention is to solve the problem of inclination of a movable flange in a continuously variable transmission with a simple structure.

[0009]

According to a first aspect of the present invention, there is provided a tilt control device for a continuously variable transmission. The continuously variable transmission includes a driving pulley, a driven pulley, and an endless belt. The drive pulley has a V-shape between the drive shaft, a drive fixing flange fixed around the drive shaft, and an axially movable relative to the drive fixed flange disposed about the drive shaft. And a driving movable flange having a groove. The driven pulley has a V-shape between the driven shaft, a driven fixed flange fixed around the driven shaft, an axially movable relative to the driven fixed flange disposed around the driven shaft, and the driven fixed flange. And a driven movable flange having a groove. The endless belt is hung on V-shaped grooves of a driving pulley and a driven pulley.

[0010] The tilt suppressing device is disposed in the endless belt between the driving pulley and the driven pulley. The tilt suppressing device is for suppressing the tilt of the driving movable flange by contacting the driving fixed flange and the driving movable flange, and suppressing the tilt of the driven movable flange by contacting the driven fixed flange and the driven movable flange. Device. The tilt suppressing device has a shuttle and a plurality of contact portions. The shuttle is reciprocable between a driving pulley and a driven pulley. The plurality of contact portions are attached to the shuttle so as to be rotatable around an axis parallel to the rotation axis of the drive and driven pulley. The plurality of contact portions are in contact with the respective flanges.

In the tilt suppressing device according to the first aspect, the shuttle does not abut on each flange, and a plurality of abutting portions abut on each flange. That is, the plurality of abutting portions rotate with the flanges respectively abutting, but the shuttle itself does not rotate. Therefore, the structure for supporting the shuttle and the structure of the shuttle itself are simplified. The tilt suppressing device according to claim 2 further includes a plurality of elastic members provided on the shuttle in claim 1. The plurality of elastic members urge the plurality of contact portions toward the respective flanges.

In the continuously variable transmission according to the second aspect, the plurality of contact portions are always in contact with the respective flanges by the plurality of elastic members, thereby suppressing the inclination of each movable flange. here,
The inclination of the movable flange is reliably suppressed by a simple structure in which an elastic member is provided at each of the plurality of contact portions. According to a third aspect of the present invention, in the tilt suppressing device according to the first or second aspect, a shuttle guide is further provided. The shuttle can reciprocate between a driving pulley and a driven pulley along a shuttle guide.

[0013] In the tilt suppressing device according to the fourth aspect, in the third aspect, the shuttle guide is fixed to the drive shaft and the driven shaft. In the tilt suppressing device according to the fourth aspect, a special structure for supporting the shuttle guide is not required. In the tilt suppressing device according to the fifth aspect, in the third or fourth aspect, the shuttle guide is a plate-like member having both ends fixed to a drive shaft and a driven shaft. A hole is formed in the shuttle guide. The shuttle is housed in the hole and guided by the wall of the hole.

In the tilt suppressing device according to the fifth aspect, the shuttle is movable within the hole of the plate-like shuttle guide.
Here, both the shuttle guide and the shuttle are realized with a simple structure. The continuously variable transmission according to claim 6 includes a drive pulley, a driven pulley, an endless belt,
5. The inclination suppressing device according to any one of 5. The drive pulley has a V-shape between the drive shaft, a drive fixing flange fixed around the drive shaft, and an axially movable relative to the drive fixed flange disposed about the drive shaft. And a driving movable flange having a groove. The driven pulley has a V-shape between the driven shaft, a driven fixed flange fixed around the driven shaft, an axially movable relative to the driven fixed flange disposed around the driven shaft, and the driven fixed flange. And a driven movable flange having a groove. The endless belt is hung on V-shaped grooves of a driving pulley and a driven pulley.

[0015]

FIG. 1 shows a continuously variable transmission 1 according to an embodiment of the present invention. The continuously variable transmission 1 is a device capable of continuously changing the gear ratio by using a pair of pulleys and a belt. The continuously variable transmission 1 mainly includes a driving pulley 2, a driven pulley 3, and an endless belt 4 inclination suppressing device 6. The rotation axis O1 of the driving pulley 2 and the rotation axis O2 of the driven pulley 3 are parallel to each other. The torque of the driving pulley 2 is transmitted to the driven pulley 3 via the endless belt 4.

The drive pulley 2 mainly includes a drive shaft 1
0, a fixed flange 11 fixed to the
And a movable flange 16 movably mounted in the axial direction with respect to the movable flange 16. The drive shaft 10 is for transmitting torque from the engine, and has a bearing 1.
3, 14 support the case (not shown). The fixed flange 11 is fixed around the drive shaft 10. That is, the fixed flange 11 rotates integrally with the drive shaft 10 and cannot move in the axial direction with respect to the drive shaft 10. The fixed flange 11 has a cone-shaped inclined surface on one side. The drive shaft 10 has an oil passage 19 connected to a hydraulic operating mechanism (not shown). The oil passage 19 extends in the drive shaft 10 in the axial direction, and opens to the outer peripheral surface of the drive shaft 10.

An annular plate 15 is fixed to the drive shaft 10. The plate 15 is a member for configuring a hydraulic chamber 18 described later, and a seal member is attached to an outer peripheral edge thereof. The movable flange 16 is disposed around the drive shaft, and is engaged with the drive shaft 10 so as to rotate integrally with the drive shaft 10 and to be movable in the axial direction. For example, the movable flange 16 is in spline engagement with the drive shaft 10. The movable flange 16 has a cone-shaped inclined surface on the surface facing the fixed flange 11. Thereby, a groove having a V-shaped cross section is formed between the fixed flange 11 and the movable flange 16. The width of the V-shaped groove changes in the axial direction as the movable flange 16 moves in the axial direction. An annular plate 17 is fixed to the movable flange 16. The plate 17 has a cylindrical outer peripheral wall that contacts the outer peripheral edge of the plate 15 described above. Thereby, the plate 17 constitutes the hydraulic chamber 18 between the plate 15 and the movable flange 16. The above-described oil passage 19 communicates with the hydraulic chamber 18. The movable flange 16 can approach or separate from the fixed flange 11 by a change in the hydraulic pressure in the hydraulic chamber 18.

The driven pulley 3 is arranged close to the driving pulley 2. The driven shaft 20, fixed flange 21, movable flange 26, plate 25, plate 27, bearing 23, bearing 24, and hydraulic chamber 28 of the driven pulley 3 are almost the same as those described for the drive pulley 2, and therefore, are not described here. Description is omitted. In the driving pulley 2 and the driven pulley 3, the positions of the fixed flange, the movable flange, and the hydraulic chamber are opposite in the axial direction. Thus, the fixed flange 21 of the drive pulley 2 corresponds to the movable flange 16 of the drive pulley 2, and the movable flange 26 of the driven pulley 3 corresponds to the fixed flange 11 of the drive pulley 2. As a result, the movable flange 1
The outer peripheral edges of the fixed flange 11 and the movable flange 26 are close to each other.

The endless belt 4 has a number of elements 31 and 1
This is an assembly including the pair of metal belts 32.
The element 31 is wound between the V-shaped groove of the driving pulley 2 and the V-shaped groove of the driven pulley 3, and each element 31 has an inclined surface that comes into contact with the inclined surface of each of the flanges 11, 16, 21, and 26. On both sides in the axial direction. Metal belt 32
Is a member for holding many elements 31 integrally.

Next, the tilt suppressing device 6 will be described.
The tilt suppressing device 6 is a device for suppressing the movable flanges 16 and 26 from tilting with respect to the respective rotation axes O1 and O2. More specifically, the inclination suppressing device 6 is a device for suppressing the approach between the fixed pulley and the movable flange at a portion of each pulley that is close to the other pulley.

The tilt suppressing device 6 is mainly composed of a shuttle guide 34 and a shuttle assembly 35. The shuttle guide 34 is a plate-like member that extends in one direction as shown in FIGS. 2 and 3. The shuttle guide 34 has an elliptical shape in plan view. Circular holes 37 and 38 are formed at both ends in the longitudinal direction of the shuttle guide 34. The drive shaft 10 of the drive pulley 2 is inserted into the hole 37, and the driven shaft 20 of the driven pulley 3 is inserted into the hole 38. More specifically, one end of the shuttle guide 34 is connected to the fixed flange 11 and the movable flange 16.
, And is disposed close to the fixed flange 11, and in the state of FIG. 1, is disposed away from the movable flange 16 in the axial direction. The other end of the shuttle guide 34 is connected to the fixed pulley 3 and the movable flange 2
6 and is arranged so as to be close to the fixed flange 21. In the state of FIG. 1, the movable flange 26 is arranged with a predetermined gap in the axial direction. In addition, hole 3
Cylindrical bearings 40 and 41 are mounted in the hole 7 and the hole 38, respectively. That is, the shuttle guide 34 includes the bearing 40,
It is supported by the drive shaft 10 and the driven shaft 20 via 41 respectively. Shuttle guide 34
Has inclined surfaces 42 and 44 which are close to the fixed flanges 11 and 21, respectively. Thereby, the axial position of the shuttle guide 34 is substantially determined. Further, the shuttle guide 34 has inclined surfaces 43 and 45 at portions corresponding to the movable flanges 16 and 26 to secure a predetermined gap in the axial direction in the state of FIG. The inclined surfaces 43 and 45 prevent the movable flanges 16 and 26 from coming into contact with the shuttle guide 34 even when the movable flanges 16 and 26 are closest to the fixed flanges 11 and 21, respectively. It has become.

As described above, the shuttle guide 34
Is a member that is directly mounted on the drive pulley 2 and the driven pulley 3 of the conventional continuously variable transmission 1, and does not require a special device or mechanism for mounting. This simplifies the overall structure and eliminates the need for a space for a special structure. In particular, the shuttle guide 34 is disposed between the driving pulley 2 and the driven pulley 3, and is particularly disposed axially between the fixed flange 11 and the fixed flange 21 in the axial direction, contributing to space saving. I do.

A hole 39 is formed in the center of the shuttle guide 34. The hole 39 is a hole penetrating in the axial direction, and has a rectangular shape. The side of the hole 39 is the drive pulley 2
And a second side 39b perpendicular to the first side 39a, which is parallel to a line connecting the center of the driven pulley 3 with the center of the driven pulley 3. The first side 39a is a guide surface for guiding a shuttle assembly 35 described later, and the second side 39b is a stopper surface for restricting the movement of the shuttle assembly 35.

The shuttle assembly 35 will be described.
The shuttle assembly 35 is arranged in a hole 39 of the shuttle guide 34. That is, the shuttle assembly 35 is disposed between the driving pulley 2 and the driven pulley 3. The shuttle assembly 35 mainly includes a roller holder 49 (shuttle) and a plurality of roller pairs 46, 47, and 48.
(Contact part). Shuttle Assy 3
5 holds each roller pair 46, 47, 48,
The shuttle member is supported by the shuttle guide 34 so as to reciprocate between the driving pulley 2 and the driven pulley 3. The roller holder 49 is attached to the first side 3 of the hole 39.
It has a support surface 49a supported by 9a. Thus, the roller holder 49 can reciprocate between the driving pulley 2 and the driven pulley 3 while being supported by the shuttle guide 34 in the hole 39. Further, the roller holder 49 is also movable in the axial direction with respect to the hole 39. Further, since the roller holder 49 is supported by the first side 39a, movement and rotation in the short direction are prohibited. Both sides of the shuttle assembly 35 facing the second side 39b are curved so that the width in the longitudinal direction decreases toward the center.

Next, the roller pairs 46, 47 and 48 will be described. The roller pair 46 and the roller pair 48 are mechanisms for suppressing the inclination of the movable flange 16 by contacting the fixed flange 11 and the movable flange 16 of the drive pulley 2. The roller pair 46 and the roller pair 48 are located on the drive pulley 2 side at both ends in the short direction of the roller holder 49. Thus, the roller pair 46 and the roller pair 48 are connected to the center of the driving pulley 2 and the driven pulley 3
Are located symmetrically with respect to the line connecting the center of
The fixed flange 11 and the movable flange 16 are in contact with each other at two positions. Roller pair 47 is roller pair 4
6 and the roller pair 48 in the short direction, and is located closer to the driven pulley 3 than the roller pairs 46 and 48. Thus, the roller pair 47 is connected to the drive pulley 2
Is located on a straight line connecting the center of the driven pulley 3 and the center of the driven pulley 3, and comes into contact with the fixed flange 21 and the movable flange 26 of the driven pulley 3.

Next, the structure of the roller pairs 46, 47, 48 will be described in detail. Here, the roller pair 46
Only the structure described above will be described, and the roller pair 47 and the roller pair 48 have the same structure, and a description thereof will be omitted. The roller pair 46 mainly includes a first roller 50 and a second roller 51 and a spring 52 (elastic member).
It is composed of The first roller 50 and the second roller 51 have the same shape, and are inserted into holes formed in the roller holder 49. The first and second rollers 50 and 51 are rotatably and axially movably supported in a hole of the roller holder 49 via a cylindrical bearing 53. That is, the first and second rollers 50 and 5
Reference numeral 1 denotes a rotating shaft O1 of a driving pulley 2 and a driven pulley 3
Is rotatable with respect to the roller holder 49 about an axis parallel to the rotation axis O2. The first roller 50 includes a head 58, a trunk 59 extending from the head 58, and a cylindrical portion 60 extending from the trunk 59. The head 58 has a larger diameter than the body 59 and is located outside the roller holder 49. The body portion 59 extends inside the bearing 53. The cylindrical portion 60 further extends from the body portion 59.
The head portion 58 has a flat central portion 61 and a tapered tapered surface 62 formed around the central portion 61. A washer 54 is arranged between the head 58 and the side surface of the roller holder 49. In the state shown in FIG. 5, the spring 52 is disposed in a space between the cylindrical portion 60 of the first roller 50 and the cylindrical portion 60 of the second roller 51. The spring 52 is in the state of FIG.
The first roller 50 and the second roller 5 are compressed in the axial direction.
1 are urged in a direction away from each other. In the roller pair 48 shown in FIG. 6, the spring 52 extends to the free state and separates the first roller 50 and the second roller 51 as far as possible in the axial direction.

As shown in FIGS. 1 and 9, when the shuttle assembly 35 is mounted on the pulleys 2 and 3, the spring 52 is compressed in the axial direction. Therefore, the first roller 50 and the second roller 51 are in contact with the corresponding flanges, and apply an urging force. For this reason, the contact area between the cone surface of each flange and the first and second rollers 50 and 51 is easily ensured.

Next, the operation will be described. 1, 7 and 9, the contact radius R1 of the endless belt 4 on the drive pulley 2 side and the contact radius R2 of the driven pulley 3 are equal. That is, the gear ratio of the continuously variable transmission 1 in this state is 1: 1. At this time, as shown in FIG. 9, the first roller 50 of the roller pair 46 and the roller pair 48 is in contact with the inclined surface of the fixed flange 11, and
The roller 51 is in contact with the inclined surface of the movable flange 16. More specifically, the tapered surface 62 of each of the first roller 50 and the second roller 51 is in contact with each inclined surface. Here, since the first roller 50 and the second roller 51 are always urged in the axial direction by the spring 52, the first roller 50 and the second roller 51 surely come into contact with each inclined surface, and the degree of adhesion is further improved. As a result, the movable flange 16 is less likely to tilt. The first roller 50 and the second roller 51 rotate together with the flanges 11 and 16, but the rotation does not affect the roller holder 49.

In the roller pair 47, the first roller 50 is in contact with the movable flange 26, and the second roller 51 is in contact with the fixed flange 21. Since the effect of the roller pair 47 is the same as that of the roller pair 48 and the roller pair 46, the description is omitted here. Next, by operating the hydraulic operating mechanism, the movable flange 16 separates from the fixed flange 11 in the drive pulley 2, and the movable flange 26 approaches the fixed flange 21 in the driven pulley 3. As a result, as shown in FIG. 8, the contact radius of the endless belt 4 in the drive pulley 2 is reduced from R1 by A to R3. Further, the contact radius of the endless belt 4 in the driven pulley 3 is increased by R from R2 to R4. Thus, the endless belt 4 has a large angular velocity at the driving pulley 2 and a small angular velocity at the driven pulley 3. As a result, a low speed and high torque transmission state is obtained.

When shifting from the state shown in FIG. 7 to the state shown in FIG. 8, the shuttle assembly 35 moves the movable flange 2 of the driven pulley 3.
6 and is pushed by the fixed flange 21 to move to the drive pulley 2 side. 8 and 10 after the movement, the first roller 50 and the second roller 51 of the roller pairs 46 and 48 are shown.
Are kept in contact with the fixed flange 11 and the movable flange 16, respectively. Further, the roller pair 47 maintains a state in which the first roller 50 and the second roller 51 are in contact with the movable flange 26 and the fixed flange 21, respectively. In this way, the inclination suppressing device 6 can be operated even at a low speed.
Suppresses the inclination of the movable flange 16 and the movable flange 26.

As shown in FIG. 8, the driving pulley 2
Is different from the mounting radius change amount A (R1-R3) of the driven pulley 3 and the mounting radius change amount B (R4-R2). Specifically, A is greater than B. That is, this means that the amount of axial movement of the movable flange 16 in the drive pulley 2 is
6 means greater than the amount of movement in the axial direction. As a result, in FIG. 10, the axial width between the fixed flange 11 and the movable flange 16 of the driving pulley 2 is changed to the fixed flange 21 and the movable flange 2 of the driven pulley 3.
6 is wider than the axial width. Therefore, the roller pair 46,
The amount of protrusion of the first roller 50 and the second roller 51 at 48 is larger than that at the roller pair 47. As described above, the roller pairs 46 and 48 abutting on the flange on the drive pulley 2 side and the roller pair 47 abutting on each flange of the driven pulley 3 are configured to be separated and operate independently. This also reliably suppresses the inclination of the movable flange.

As described above, in the continuously variable transmission 1, the inclination of each of the movable flanges 16 and 26 in each of the pulleys 2 and 3 is suppressed by the simple inclination suppressing device 6.
In other words, the inclination suppressing device 6 includes the movable flange 16,
The offset load acting between the belt 26 and the endless belt 4 is canceled. Further, the inclination suppressing device 6 reliably suppresses the inclination of the movable flanges 16 and 26 even during high torque transmission at low speed. [Advantages of Tilt Suppressing Device 6] (1) In the continuously variable transmission 1, in the tilt suppressing device 6, the first and second roller pairs 46, 47, and 48 are used.
Rollers 50 and 51 are mounted on flanges 11, 16, 21, and 22, respectively.
6 abuts. That is, a plurality of roller pairs 46,
The rollers 47 and 48 rotate together with the abutting flanges, but the roller holder 49 itself does not rotate. Therefore, the structures of the shuttle guide 34 and the shuttle assembly 35 are simplified.

More specifically, the shuttle guide 34 is a plate-like member having a hole 39 formed at the center, and the roller holder 49 constituting the shuttle assembly 35 is a block-shaped member supported by the hole 39. (2) The roller pairs 46 and 48 are in contact with the flanges 11 and 16 on the movable pulley 2, and the roller pair 47 is in contact with the flanges 21 and 26 on the driven pulley 3. Specifically, by providing a spring 52 for each of the roller pairs 46, 47, and 48, each roller pair 4
6, 47, 48, the first and second rollers 50, 5
1 keeps the contact state by following the width change of each V-shaped groove.

Here, since the roller pairs 46 and 48 and the roller pair 47 provided on the roller holder 49 are formed independently, the first and second rollers are formed by the roller pairs 46 and 48 and the roller pair 47. The axial heights of 50 and 51 can be made different. As a result, even when the change amount of the V-shaped groove in the driving pulley 2 and the change amount of the V-shaped groove in the driven pulley 3 are different, each roller pair 46, 47,
Reference numeral 48 securely contacts the flanges 11, 16, 21, and 26 to suppress the inclination of the movable flanges 16, 26. (3) The shuttle guide 34 is fixed to the fixed flange 11, the drive shaft 10, the fixed flange 21 and the shaft 20, and a special structure for supporting the shuttle guide 34 is not required.

Further, the method of fixing the shuttle guide 34 requires only a simple operation of inserting the shafts 10 and 20 into the holes 37 and 38, respectively. (4) The inclination suppressing device 6 is a device that can be directly attached to a conventional continuously variable transmission. In other words, it is not necessary to provide a special fixing member on the continuously variable transmission side when using the inclination suppressing device 6. Further, after the attachment, the inclination suppressing device 6 is accommodated between the movable pulley 2 and the driven pulley 3 and in the endless belt 4, and does not require any special space. (5) The inclination suppressing device 6 automatically operates in accordance with the operation of the driving pulley and the movable pulley, thereby suppressing the inclination of the movable flange. Therefore, no separate driving force is required. [Other Embodiments] The shape of the roller holder, the shape, the number, and the arrangement of the rollers are not limited to the above embodiment.

[0036]

In the tilt suppressing device according to the present invention, the plurality of abutting portions rotate together with the abutting flanges, but the shuttle itself does not rotate. Therefore, the structure for supporting the shuttle and the structure of the shuttle itself are simplified.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a continuously variable transmission as one embodiment of the present invention.

FIG. 2 is a plan view of the tilt suppressing device.

FIG. 3 is a longitudinal sectional view of the inclination suppressing device.

FIG. 4 is a side view of the shuttle.

FIG. 5 is a partial cross-sectional view of the shuttle.

FIG. 6 is a view corresponding to FIG. 5, in which the height of one roller changes.

FIG. 7 is a schematic plan view for explaining a change in the position of the shuttle caused by a change in the mounting radius of each pulley.

FIG. 8 is a schematic plan view for explaining a change in the position of the shuttle caused by a change in the mounting radius of each pulley.

FIG. 9 is a partially enlarged view of FIG. 1;

FIG. 10 is a view corresponding to FIG. 9, for explaining the position of the shuttle at low speed.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 continuously variable transmission 2 drive pulley 3 driven pulley 4 endless belt 6 tilt suppressing device 10 shaft 11 fixed flange 16 driven flange 20 shaft 21 fixed flange 26 movable flange 34 shuttle guide 35 shuttle assembly 46 roller pair 47 roller pair 48 roller pair 49 Roller holder (shuttle)

Claims (6)

[Claims] 1. A drive shaft, a drive fixing flange fixed around the drive shaft, and an axially movable relative to the drive fixed flange around the drive shaft, the drive fixing flange comprising: A drive pulley having a drive movable flange defining a V-shaped groove therebetween, a driven shaft, a driven fixed flange fixed around the driven shaft, and a driven fixed flange about the driven shaft. A driven pulley that is movable in the axial direction and has a driven movable flange that forms a V-shaped groove between the driven pulley and the driven fixed flange; and a driven pulley that is hung on the V-shaped groove of the driven pulley. An endless belt and an inclination suppressing device used in a continuously variable transmission having an endless belt, wherein the endless belt is provided between the driving pulley and the driven pulley within the endless belt. Is placed, the inclination of the drive movable flange is suppressed by contacting the drive fixed flange and the drive movable flange, and the inclination of the driven movable flange is brought into contact with the driven fixed flange and the driven movable flange. A shuttle capable of reciprocating between the driving pulley and the driven pulley, and being attached to the shuttle so as to be rotatable around an axis parallel to a rotation axis of the driving and driven pulley. And a plurality of contact portions that respectively contact the flanges. 2. The tilt according to claim 1, further comprising a plurality of elastic members provided on the shuttle, wherein the plurality of elastic members urge the plurality of contact portions toward the respective flanges. Suppression device. 3. The tilt suppressing device according to claim 1, further comprising a shuttle guide, wherein the shuttle is able to reciprocate between the driving pulley and the driven pulley along the shuttle guide. 4. The tilt suppressing device according to claim 3, wherein the shuttle guide is fixed to the drive shaft and the driven shaft. 5. The shuttle guide is a plate-like member having both ends fixed to the drive shaft and the driven shaft,
The tilt suppressing device according to claim 3, wherein a hole is formed in the shuttle guide, and the shuttle is housed in the hole and guided by a wall of the hole. 6. A driving shaft, a driving fixing flange fixed around the driving shaft, and an axially movable relative to the driving fixing flange around the driving shaft, the driving fixing flange comprising: A drive pulley having a drive movable flange defining a V-shaped groove therebetween, a driven shaft, a driven fixed flange fixed around the driven shaft, and a driven fixed flange about the driven shaft. A driven pulley that is movable in the axial direction and has a driven movable flange that forms a V-shaped groove between the driven pulley and the driven fixed flange; and a driven pulley that is hung on the V-shaped groove of the driven pulley. An endless belt, The inclination suppressing device according to any one of claims 1 to 5,
Continuously variable transmission equipped with