JP2015190539A - Belt continuous variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt continuous variable transmission capable of sufficiently holding a belt member between two members in a state in which the transmission stops operating while improving durability.SOLUTION: A belt continuous variable transmission 1 comprises: a fixed sheave 160; a movable sheave 170; a cylinder member 190 provided to surround the movable sheave 170; and a support member 130 supporting the cylinder member 190. The movable sheave 170 includes an inner cylinder portion 171 that includes a tip end portion 171a facing the cylinder member 190 in an axis direction, and the cylinder member 190 includes a flange portion 191 facing the tip end portion 171a in the axis direction. The belt continuously variable transmission 1 further comprises an elastic member 110 provided between the tip end portion 171a and the flange portion 191 and stretchable in the axial direction. The elastic member 110 abuts on the flange portion 191 and the tip end portion 171a if the movable sheave 170 retreats from a position of a maximum change gear ratio with respect to the fixed sheave 160.

Description

  The present invention relates to a belt-type continuously variable transmission that changes speed by changing a pulley width of a speed change pulley.

  Conventionally, various belt-type continuously variable transmissions have been proposed. For example, a belt-type continuously variable transmission disclosed in Japanese Patent Application Laid-Open No. 2008-208661 (Patent Document 1) includes a fixed sheave fixed to a rotating shaft, a movable sheave movable in the axial direction of the rotating shaft, and a movable sheave. And a belt member wound around a pulley groove formed between the stationary sheave and the fixed sheave. The movable sheave elastically deforms the cylinder member by pressing the cylinder member provided on the back side of the movable sheave in the retracting direction of the movable sheave when the movable sheave moves to the most retracted position from the fixed sheave. A stopper is provided.

  With such a configuration, a restoring force is developed in the elastically deformed cylinder member. This return force acts in a direction to advance the movable sheave toward the fixed sheave. For this reason, in a state where the operation of the belt-type continuously variable transmission is stopped by moving the movable sheave backward from the fixed sheave so that the pulley groove width is maximized, the movable sheave and the fixed sheave can be sufficiently pinched. .

JP 2008-208861 A

  However, in the configuration disclosed in Patent Document 1, the cylinder member is partially elastically deformed by bringing the stopper provided at the tip of the cylinder member and the movable sheave into contact. Since the movable sheave and the stopper portion are in contact with each other in the radial direction of the rotation shaft from the rotation shaft, a considerably large moment acts on these contact portions. For this reason, durability is reduced by repeated use, and there is a concern that the cylinder member and the movable sheave may be deformed to lower the function or be damaged.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a belt type that can sufficiently clamp a belt member in an operation stopped state while enhancing durability. The object is to provide a continuously variable transmission.

  The belt type continuously variable transmission is provided with a rotating shaft, a fixed sheave integrally fixed to the rotating shaft, and spaced apart from the fixed sheave along an axial direction of the rotating shaft. A movable sheave fitted to the rotating shaft so as to be able to advance and retreat, a cylinder member provided to surround the movable sheave from the opposite side of the fixed sheave to the movable sheave, and the cylinder member And a support member that supports one end side of the cylinder member from the side opposite to the movable sheave. The movable sheave includes an inner cylinder portion that is slidably fitted to an outer peripheral portion of the rotating shaft and has a tip portion that faces the cylinder member in the axial direction. The cylinder member includes a flange portion that contacts the support member while extending radially in the radial direction of the rotation shaft on the one end side, and that faces the distal end portion of the inner cylinder portion in the axial direction. The belt-type continuously variable transmission further includes an elastic member that is provided between the distal end portion of the inner cylinder portion and the flange portion of the cylinder member, and that can expand and contract in the axial direction. When the elastic member retreats from a position where the maximum gear ratio is achieved with respect to the fixed sheave, the elastic member comes into contact with the flange portion of the cylinder member and the tip portion of the inner cylinder portion.

  By having such a configuration, the incompressible fluid is discharged from the hydraulic chamber defined by the cylinder member and the movable sheave, and the movable sheave is retracted with respect to the fixed sheave from the position where the maximum gear ratio is achieved. Sometimes, the elastic member is pushed along the axial direction so as to move away from the fixed sheave by the distal end portion of the inner cylinder portion. Thereby, the elastic member is elastically deformed, and a restoring force acting in a direction toward the fixed sheave acts on the movable sheave. A clamping pressure can be applied to the belt member based on the restoring force. For this reason, even when the operation of the belt type continuously variable transmission is stopped, the belt member can be prevented from slipping between the fixed sheave and the movable sheave of the primary pulley.

  Moreover, the collar part pressed by an elastic member is stably supported by contacting a support member. For this reason, even if a collar part is pressed, the rotation moment which goes around to the supporting member side hardly arises. Thereby, a cylinder member does not deform | transform and durability of a cylinder member can be improved.

  According to the present invention, it is possible to provide a belt-type continuously variable transmission that can sufficiently clamp a belt member in a stopped state of transmission while enhancing durability.

It is a block diagram which shows the power transmission path | route of the vehicle carrying the belt type continuously variable transmission which concerns on Embodiment 1. FIG. 3 is a schematic cross-sectional view showing a primary pulley provided in the belt-type continuously variable transmission according to Embodiment 1. FIG. 6 is a schematic cross-sectional view showing a primary pulley provided in a belt type continuously variable transmission according to Embodiment 2. FIG. 6 is a schematic cross-sectional view showing a primary pulley provided in a belt-type continuously variable transmission according to Embodiment 3. FIG. FIG. 6 is a schematic cross-sectional view showing a primary pulley provided in a belt type continuously variable transmission according to a fourth embodiment. FIG. 9 is a schematic cross-sectional view showing a primary pulley provided in a belt type continuously variable transmission according to a fifth embodiment. FIG. 10 is a schematic cross-sectional view showing a primary pulley provided in a belt type continuously variable transmission according to a sixth embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a configuration diagram showing a power transmission path of a vehicle equipped with a belt type continuously variable transmission according to the present embodiment. With reference to FIG. 1, a power transmission path of a vehicle equipped with a belt type continuously variable transmission according to the present embodiment will be described.

  The belt type continuously variable transmission 1 is configured to change the torque and the number of revolutions transmitted from a power source 2 such as an engine or an electric motor, and output it to the wheels 5 via the counter gear unit 3 and the differential gear 4. ing. The belt-type continuously variable transmission 1 includes a primary pulley 100, a secondary pulley 200, and a belt member 180 that is wound around the pulleys 100 and 200 and transmits power to the pulleys 100 and 200. Yes. The primary pulley 100 is transmitted from the power source 2 via the input shaft 6 and rotates. Secondary pulley 200 outputs the power transmitted from primary pulley 100 to output shaft 8 arranged in parallel with input shaft 6.

  The belt type continuously variable transmission 1 changes the rotation of the primary shaft 120 that is a part of the input shaft 6 steplessly and transmits it to the secondary shaft 220 that is a part of the output shaft. The primary shaft 120 and the secondary shaft 220 correspond to rotation axes.

  Both primary pulley 100 and secondary pulley 200 are configured by combining fixed sheaves 160 and 260 and movable sheaves 170 and 270. The primary shaft 120 and the secondary shaft 220 are made of metal such as iron, for example. The belt member 180 includes a large number of metal pieces and a plurality of steel rings.

  The primary pulley 100 is provided with a fixed sheave 160 that is integrally fixed to the outer peripheral portion of the primary shaft 120, and is separated from the fixed sheave 160 along the axial direction of the primary shaft 120, and can move forward and backward with respect to the fixed sheave 160. And a movable sheave 170 fitted to the primary shaft 120.

  The belt member 180 is sandwiched between the fixed sheave 160 and the movable sheave 170. By driving the movable sheave 170 using the hydraulic actuator 50, the groove width of the pulley groove formed between the sheaves 160 and 170 is changed. Thereby, the winding position of the belt member 180 in the radial direction of the primary pulley 100 is changed.

  The secondary pulley 200 is provided to be fixed to the outer peripheral portion of the secondary shaft 220 integrally with the fixed sheave 260 and spaced from the fixed sheave 260 along the axial direction of the secondary shaft 220, and can move forward and backward with respect to the fixed sheave 260. And a movable sheave 270 fitted to the secondary shaft 220.

  The belt member 180 is sandwiched between the fixed sheave 260 and the movable sheave 270. By driving the movable sheave 270 using the hydraulic actuator 51, the groove width of the pulley groove formed between the sheaves 260 and 270 is changed. Thereby, the winding position of the belt member 180 in the radial direction of the secondary pulley 200 is changed.

  Thus, by controlling the hydraulic actuators 50 and 51 according to the running state of the vehicle and changing the groove width of the pulley groove, the winding radius of the belt member 180 around the primary pulley 100 and the secondary pulley 200 changes. Thereby, the belt-type continuously variable transmission 1 changes the ratio of the rotation speed of the primary shaft 120 and the rotation speed of the secondary shaft 220, that is, the gear ratio continuously (continuously).

  FIG. 2 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. In FIG. 2, the primary pulley 100 at the time of the maximum reduction ratio (at the time of the maximum transmission ratio) is shown above the virtual center axis C1 of the primary shaft 120, and at the maximum speed increase ratio below the center axis C1. The primary pulley 100 is shown. With reference to FIG. 2, a detailed configuration of primary pulley 100 provided in the belt type continuously variable transmission according to the present embodiment will be described.

  The primary shaft 120 has a large-diameter portion 121 extending from the other end portion 120a toward the one end portion 120b and a smaller diameter than the large-diameter portion 121, and is closer to the one end portion 120b than the large-diameter portion 121. An adjacent medium diameter part 122 and a small diameter part 123 that is formed to have a smaller diameter than the medium diameter part 122 and that is adjacent to the one end part 120b side with respect to the medium diameter part 122 are provided.

  A step portion 128 is formed at the boundary position between the large diameter portion 121 and the medium diameter portion 122, and a step portion 127 is formed at the boundary position between the medium diameter portion 122 and the small diameter portion 123. Further, a step portion 129 for positioning an elastic member 110 described later is formed at the end portion of the medium diameter portion 122 located on the small diameter portion 123 side.

  Bearings 130 and 131 are attached to one end 120 b and the other end 120 a of the primary shaft 120. The primary shaft 120 is supported by bearings 130 and 131 so as to be rotatable around the central axis C1.

  A nut 140 is screwed to one end 120 b of the primary shaft 120. When the nut 140 is screwed, the movable sheave 170, a cylinder member 190, which will be described later, and the bearing 130 are assembled on the primary shaft.

  Inside the primary shaft 120, a fluid path 124 extending in the direction of the axis C1 (extending direction of the central axis C1) and fluid paths 125 and 126 extending in the radial direction are formed. The fluid paths 125 and 126 are formed so as to reach from the inner wall surface of the fluid path 124 to the outer peripheral surface of the primary shaft 120. The fluid paths 125 and 126 are formed at an interval in the direction of the axis C1.

  The fixed sheave 160 is integrally formed on the outer periphery of the large diameter portion 121 of the primary shaft 120. The fixed sheave 160 extends from the outer peripheral surface of the primary shaft 120 toward the radially outer side, and is formed in a disk shape.

  The fixed sheave 160 includes a disk-shaped radial projecting portion that protrudes outward in the radial direction of the primary shaft 120. A portion of the surface of the projecting portion in the radial direction of the fixed sheave 160 that faces the movable sheave 170 is a power transmission surface 165 that contacts the belt member 180. The power transmission surface 165 is inclined so as to be separated from the movable sheave 170 as it goes outward in the radial direction of the primary shaft 120.

  The movable sheave 170 is provided on the primary shaft 120 on the side opposite to the bearing 131 with respect to the fixed sheave 160 and spaced in the direction of the axis C <b> 1 of the primary shaft 120. A fluid path 176 communicating with the fluid path 126 of the primary shaft 120 described above is provided inside the movable sheave 170.

  The movable sheave 170 includes an inner cylindrical portion 171, a radial protrusion 172, and an outer cylindrical portion 173. The inner cylinder portion 171 is fitted to the outer peripheral portion of the primary shaft 120 so as to be slidable, and has a distal end portion 171a facing a cylinder member 190 described later in the direction of the axis C1.

  The radial protrusion 172 is connected to the end of the inner cylinder 171 located on the fixed sheave 160 side. The radial protrusion 172 has a disk shape that protrudes outward in the radial direction of the primary shaft 120. A portion of the radial protrusion 172 that faces the fixed sheave 160 is a power transmission surface 175 that contacts the belt member 180. The power transmission surface 175 is inclined away from the fixed sheave 160 as it goes outward in the radial direction of the primary shaft 120.

  Outer cylinder portion 173 is formed on the side surface of movable sheave 170 that is opposite to power transmission surface 175. The outer cylindrical portion 173 protrudes along the direction of the substantially axis C1 toward the opposite side of the fixed sheave 160 on the other end side of the radial protruding portion 172 located on the side far from the primary shaft 120 in the radial direction. Is formed.

  The outer cylinder part 173 has a contact part 174 provided at the tip located on the opposite side to the radial projecting part 172 side. The contact portion 174 is slidably in contact with an inner surface of an outer peripheral portion 193 of a cylinder member 190 described later. A seal member 177 for interposing the movable sheave 170 and the cylinder member 190 in a liquid-tight manner is inserted in a groove provided on the outer periphery of the contact portion 174. As the seal member 177, for example, an O-ring can be employed.

  The cylinder member 190 is an annular member that is mounted between the bearing 130 and the movable sheave 170. The cylinder member 190 is provided so as to surround the movable sheave 170 from the side opposite to the fixed sheave 160 with respect to the movable sheave 170. The cylinder member 190 includes a flange portion 191, a curved portion 192, and an outer peripheral portion 193.

  The flange portion 191 contacts the bearing 130 while extending radially in the radial direction of the central axis C <b> 1 on one end side of the cylinder member 190. The flange portion 191 faces the distal end portion 171a of the inner cylindrical portion 171 of the movable sheave 170 in the direction of the axis C1. The collar portion 191 includes a ring-shaped shim 150. The shim 150 constitutes a part of the surface of the flange portion 191 and is provided so as to contact the stepped portion 127.

  One end side of the flange portion 191 is held together with the shim 150 by the bearing 130 and the primary shaft 120 at the stepped portion 127 of the primary shaft 120. Thereby, the cylinder member 190 is supported on the primary shaft 120. The bearing 130 corresponds to a support member that supports one end side of the cylinder member 190 from the side opposite to the movable sheave 170 with respect to the cylinder member 190.

  The bending portion 192 extends toward the outer cylinder portion 173 of the movable sheave 170 while being bent from the other end (outer peripheral end) side of the flange portion 191. The curved portion 192 connects the flange portion 191 and the outer peripheral portion 193. The outer peripheral portion 193 has an annular shape and extends along the direction of the axis C1. The inner peripheral surface of the outer peripheral portion 193 is in contact with the outer peripheral surface of the contact portion 174 of the movable sheave 170.

  The cylinder member 190 defines the hydraulic chamber 90 in cooperation with the movable sheave 170. The hydraulic chamber 90 corresponds to a region surrounded by the cylinder member 190 and the movable sheave 170. An incompressible fluid typified by oil is supplied to the hydraulic chamber 90 from the hydraulic actuator 50 (see FIG. 1) via the fluid paths 124, 125, 126, and 176 described above.

  The hydraulic actuator 50 increases or decreases the fluid pressure in the hydraulic chamber 90 to move the movable sheave 170 in the axial direction of the primary shaft 120, and moves the movable sheave 270 closer to or away from the fixed sheave 160. The width of the pulley groove is changed.

  An elastic member 110 is provided in the hydraulic chamber 90. Specifically, the elastic member 110 is provided between the distal end portion 171 a of the inner cylinder portion 171 and the flange portion 191 of the cylinder member 190. The elastic member 110 is provided to be extendable and contractible in the direction of the axis C1 of the primary shaft 120. For example, a coil spring can be employed as the elastic member 110.

  The elastic member 110 has an inner diameter slightly smaller than the outer diameter of the step portion 129 provided on the primary shaft 120. Thereby, the elastic member 110 is positioned by the step portion 129.

  When the incompressible fluid is discharged from the hydraulic chamber 90 and the movable sheave 170 is retracted from the fixed sheave 160 with respect to the maximum gear ratio, the elastic member 110 The tip 171a of the portion 171 is pushed along the direction of the axis C1 so as to move away from the fixed sheave 160. That is, the elastic member 110 is in contact with the flange portion 191 and the inner cylinder portion 171.

  As a result, the elastic member 110 is elastically deformed, and a restoring force f1 (elastic force) acting in a direction toward the fixed sheave with respect to the movable sheave 170 is expressed. As a result, even when the movable sheave 170 is located at a position where the maximum gear ratio is achieved, the clamping force f2 can be applied to the belt member 180 based on the return force f1. For this reason, even when the operation of the belt type continuously variable transmission 1 is stopped, the belt member 180 can be prevented from slipping between the fixed sheave 160 and the movable sheave 170 of the primary pulley 100.

  In addition, since the flange portion 191 is stably supported by being substantially flush with the main surface of the bearing 130, there is no rotational moment that turns around the bearing 130 even when the flange portion 191 is pressed. It hardly occurs. For this reason, the cylinder member 190 is not deformed, and the durability of the cylinder member 190 can be enhanced.

  With the configuration as described above, the belt-type continuously variable transmission 1 according to the present embodiment can sufficiently clamp the belt member 180 when the transmission is stopped while enhancing the durability. .

(Embodiment 2)
FIG. 3 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. With reference to FIG. 3, a belt-type continuously variable transmission 1A according to the present embodiment will be described.

  The belt type continuously variable transmission 1 </ b> A differs from the belt type continuously variable transmission 1 according to the first embodiment in the positioning method of the elastic member 110. Other configurations are almost the same.

  In the present embodiment, the step portion 129 according to the first embodiment is not provided, and the hook portion 151 is provided in the shim 150. The elastic member 110 is positioned by partly hooking the elastic member 110 on the hook portion 151. The hook 151 preferably has a key claw shape. The hook part 151 may be provided integrally with the shim 150 or may be provided separately from the shim 150. The inner diameter of the elastic member 110 is provided to be larger than the outer diameter of the medium diameter portion 122.

  By having such a configuration, the belt-type continuously variable transmission 1A according to the present embodiment can obtain substantially the same effect as the belt-type continuously variable transmission 1 according to the first embodiment.

(Embodiment 3)
FIG. 4 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. A belt type continuously variable transmission 1B according to the present embodiment will be described with reference to FIG.

  The belt-type continuously variable transmission 1B is different from the belt-type continuously variable transmission 1 according to Embodiment 1 in the positioning method of the elastic member 110. Other configurations are almost the same.

  In the present embodiment, the step portion 129 according to the first embodiment is not provided, and the positioning member 152 is provided on the outer peripheral portion of the medium diameter portion 122. The positioning member 152 is provided so as to protrude from the medium diameter portion 122 in the radial direction, for example. The positioning member 152 is provided so as not to hinder the movement of the movable sheave 170. That is, the positioning member 152 is provided so as not to interfere with the distal end portion 171 a of the inner cylinder portion 171. The positioning member 152 may be provided integrally with the primary shaft 120 or may be provided separately.

  By having such a configuration, the belt-type continuously variable transmission 1B according to the present embodiment can achieve substantially the same effects as the belt-type continuously variable transmission 1 according to the first embodiment.

(Embodiment 4)
FIG. 5 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. A belt type continuously variable transmission 1C according to the present embodiment will be described with reference to FIG.

  The belt-type continuously variable transmission 1 </ b> C differs from the belt-type continuously variable transmission 1 according to Embodiment 1 in the positioning method of the elastic member 110. Other configurations are almost the same.

  In the present embodiment, the step portion 129 according to the first embodiment is not provided, and a fixing member for fixing the elastic member 110 is not provided. The elastic member 110 is provided between the flange portion 191 and the inner cylinder portion 171 so as to be movable on the primary shaft 120 in the direction of the axis C1.

  In this case, the elastic member 110 contacts the elastic member 110 when the incompressible fluid is discharged from the hydraulic chamber 90 and the movable sheave 170 is retracted with respect to the fixed sheave 160. The elastic member 110 retreats along the direction of the axis C <b> 1 together with the movable sheave 170, and one end side thereof abuts on the flange portion 191. From this state, when the movable sheave 170 is retracted from the fixed sheave 160 with respect to the maximum gear ratio, the elastic member 110 is axially moved away from the fixed sheave 160 by the distal end portion 171a of the inner cylindrical portion 171. It is pushed along the C1 direction. As a result, the elastic member 110 is elastically deformed, and a restoring force f1 (elastic force) acting in the direction of moving the movable sheave 170 toward the fixed sheave is developed.

  By having such a configuration, the belt-type continuously variable transmission 1C according to the present embodiment can obtain substantially the same effect as the belt-type continuously variable transmission 1 according to the first embodiment.

(Embodiment 5)
FIG. 6 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. A belt type continuously variable transmission 1D according to the present embodiment will be described with reference to FIG.

  The belt type continuously variable transmission 1D differs from the belt type continuously variable transmission 1 according to Embodiment 1 in the positioning method of the elastic member 110. Other configurations are almost the same.

  In the present embodiment, the step portion 129 according to the first embodiment is not provided, and the hook portion 178 is provided at the distal end portion 171 a of the inner cylinder portion 171. The elastic member 110 is positioned by partly hooking the elastic member 110 on the hook portion 178. The hook 151 preferably has a key claw shape. The hook part 178 may be provided integrally with the inner cylinder part 171 or may be provided separately from the inner cylinder part 171. In addition, the hook portion 178 may be configured by providing an engagement groove on the end surface of the distal end portion 171a of the inner cylinder portion 171 so as to be recessed toward the fixed sheave side along the direction of the axis C1. In this case, the elastic member is positioned by engaging a part of the elastic member with the engaging groove.

  By having such a configuration, the belt-type continuously variable transmission 1D according to the present embodiment can obtain substantially the same effects as the belt-type continuously variable transmission 1 according to the first embodiment.

(Embodiment 6)
FIG. 7 is a schematic cross-sectional view showing a primary pulley provided in the belt type continuously variable transmission according to the present embodiment. A belt type continuously variable transmission 1E according to the present embodiment will be described with reference to FIG.

  The belt type continuously variable transmission 1E is different from the belt type continuously variable transmission 1 according to the first embodiment in that the elastic member 111 is configured by a disc spring instead of a coil spring. Other configurations are almost the same.

  In this case, the elastic member 111 may be positioned by the step portion 129 of the medium diameter portion 122, may be fixed to the shim 150, or may be fixed to the distal end portion 171a of the inner cylinder portion 171. . When the elastic member 111 is fixed to the shim 150, the elastic member 111 may be fixed in the same configuration as in the second embodiment, or the elastic member 111 may be configured integrally with the shim 150. Further, when the elastic member 111 is fixed to the distal end portion 171 a of the inner cylinder portion 171, it is fixed with the same configuration as that of the fifth embodiment.

  By having such a configuration, the belt-type continuously variable transmission 1E according to the present embodiment can achieve substantially the same effects as the belt-type continuously variable transmission 1 according to the first embodiment.

  Although the embodiments of the present invention have been described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  1, 1A, 1B, 1C, 1D, 1E Belt type continuously variable transmission, 3 counter gear unit, 4 differential gear, 5 wheels, 6 input shaft, 8 output shaft, 50, 51 hydraulic actuator, 90 hydraulic chamber, 100 primary Pulley, 110, 111 Elastic member, 120 Primary shaft, 120a, 120b End portion, 121 Large diameter portion, 122 Medium diameter portion, 123 Small diameter portion, 124, 125, 126 Fluid path, 127, 128, 129 Step portion, 130, 131 Bearing, 140 Nut, 150 Shim, 151 Hook, 152 Positioning Member, 160 Fixed Sheave, 165 Power Transmission Surface, 170 Movable Sheave, 171 Inner Tube, 171a Tip, 172 Radial Projection, 173 Outer Tube, 174 Contact portion, 175 Power transmission surface, 176 Fluid diameter Road, 177 Seal member, 178 Hook, 180 Belt member, 190 Cylinder member, 191 Hook, 192 Curved part, 193 Outer periphery, 200 Secondary pulley, 220 Secondary shaft, 260 Fixed sheave, 270 Movable sheave.

Claims (1)

A rotation axis;
A fixed sheave integrally fixed to the rotating shaft;
A movable sheave that is provided apart from the fixed sheave along the axial direction of the rotating shaft and is fitted to the rotating shaft so as to be capable of moving forward and backward with respect to the fixed sheave;
A cylinder member provided to surround the movable sheave from the opposite side of the fixed sheave with respect to the movable sheave;
A support member that supports one end side of the cylinder member from the side opposite to the movable sheave with respect to the cylinder member;
The movable sheave includes an inner cylinder portion that is slidably fitted to an outer peripheral portion of the rotating shaft and has a tip portion that faces the cylinder member in the axial direction,
The cylinder member includes a flange portion that contacts the support member while extending radially in the radial direction of the rotation shaft on the one end side, and that faces the tip portion of the inner cylinder portion in the axial direction,
An elastic member that is provided between the distal end portion of the inner cylinder portion and the flange portion of the cylinder member, and can be expanded and contracted in the axial direction;
When the movable sheave is retracted from a position where the maximum shedding ratio is set with respect to the fixed sheave, the elastic member abuts against the flange portion of the cylinder member and the tip portion of the inner cylinder portion; Belt type continuously variable transmission.

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