Clutch device

Abstract

To match a rotation center of a support plate with a rotation center of a pressure plate easily.SOLUTION: A clutch device 100 includes: a clutch center 3; a pressure plate 4; a support plate 6, and a clutch part 5. The clutch center 3 is rotatably disposed. The pressure plate 4 is rotatably disposed. The pressure plate 4 has multiple pillar parts 42 and multiple guide walls 45. Each pillar part 42 extends to a first side in an axial direction. Each guide wall 45 includes an inner guide surface directed to the radial inner side. The guide wall 45 is disposed at the radial outer side relative to the pillar part 42. The guide wall 45 extends to the first side in the axial direction. The support plate 6 has an outer peripheral surface which comes into contact with the inner guide surfaces. The support plate 6 is attached to a tip of each pillar part 42. The clutch part 5 is disposed between the clutch center 3 and the pressure plate 4.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a clutch device. [Background technology]

[0002] Generally, motorcycles, buggies, and other motorbikes use a clutch device to transmit or cut off power from the engine to the transmission. The clutch device has a clutch center, a pressure plate, a support plate, and a clutch portion (see Patent Document 1). The support plate is attached to the pressure plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-200842 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the rotation center of the support plate and the rotation center of the pressure plate are misaligned, the clutch device will not be able to rotate stably, so it is desirable to align the rotation center of the support plate and the rotation center of the pressure plate.

[0005] An object of the present invention is to provide a clutch device that can easily align the center of rotation of a support plate and the center of rotation of a pressure plate. [Means for solving the problem]

[0006] A clutch device according to a first aspect is configured to be rotatable. The clutch device includes a clutch center, a pressure plate, a support plate, and a clutch portion. The clutch center is rotatably arranged. The pressure plate is rotatably arranged. The pressure plate has a plurality of pillar portions and a plurality of guide walls. The pillar portions extend to a first side in the axial direction. The guide walls include an inner guide surface facing radially inward. The guide walls are arranged radially outward relative to the pillar portions. The guide walls extend to the first side in the axial direction. The support plate has an outer peripheral surface that abuts against the inner guide surface. The support plate is attached to a tip portion of the pillar portions. The clutch portion is arranged between the clutch center and the pressure plate.

[0007] According to this configuration, the outer peripheral surface of the support plate abuts against the inner guide surface, so that the support plate is positioned radially relative to the pressure plate, and as a result, the rotation center of the support plate and the rotation center of the pressure plate can be easily aligned.

[0008] The clutch device according to the second aspect is the clutch device according to the first aspect, and is configured as follows: The support plate is disk-shaped with an opening in the center. The outer peripheral surface of the support plate has a plurality of outer abutment surfaces and a plurality of gripping surfaces. The outer abutment surfaces abut against the inner guide surface. The gripping surfaces are disposed radially inward relative to the outer abutment surfaces. With this configuration, the gripping surfaces are gripped by a chuck, and the outer abutment surfaces and the inner wall surface of the opening can be machined simultaneously.

[0009] A clutch device according to a third aspect is the clutch device according to the second aspect, and is configured as follows: the support plate has a plurality of through holes arranged in a circumferential direction, and the outer abutment surface overlaps with the through holes when viewed in a radial direction.

[0010] The clutch device according to a fourth aspect is the clutch device according to the second or third aspect, and is configured as follows. The outer peripheral surface of the support plate has a plurality of non-contact surfaces that do not contact the inner guide surface. The non-contact surfaces are arranged radially outward from the gripping surface. The outer contact surfaces are arranged alternately with the non-contact surfaces in the circumferential direction. The gripping surfaces are arranged between the outer contact surfaces and the non-contact surfaces.

[0011] A clutch device according to a fifth aspect is the clutch device according to any one of the first to fourth aspects, and is configured as follows: the pressure plate has a connecting reinforcement portion. The connecting reinforcement portion extends in the axial direction. The connecting reinforcement portion connects the pillar portion and the guide wall.

[0012] A clutch device according to a sixth aspect is the clutch device according to any one of the first to fifth aspects, further comprising a plurality of biasing members. The biasing members are arranged at intervals from the column portion in the circumferential direction. The biasing members are arranged between the clutch center and the support plate.

[0013] A clutch device according to a seventh aspect is the clutch device according to any one of the first to sixth aspects, and is configured as follows: The guide wall has an outer guide surface facing radially outward. The clutch center has an inner abutment surface. The inner abutment surface faces radially inward. The inner abutment surface abuts against the outer guide surface. With this configuration, both the support plate and the clutch center are positioned radially by abutting against the guide wall, thereby further improving radial positioning accuracy.

[0014] The clutch device according to an eighth aspect is the clutch device according to the seventh aspect, and is configured as follows: The inner guide surface is positioned so as to overlap with the outer guide surface when viewed in the radial direction. Effect of the Invention

[0015] According to the present invention, the axial dimension of the biasing member can be increased. [Brief description of the drawings]

[0016] [Figure 1] FIG. [Diagram 2] Cross-sectional view of line II-II in Figure 1. [Diagram 3] FIG. [Figure 4] Cross-sectional view taken along line IV-IV in Figure 1. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The clutch device according to this embodiment will be described below with reference to the drawings. In the following description, the axial direction is the direction in which the rotation axis O of the clutch device 100 extends. The circumferential direction is the circumferential direction of a circle centered on the rotation axis O, and the radial direction is the radial direction of a circle centered on the rotation axis O. The first rotation direction is the direction in which the clutch device rotates, and the second rotation direction is the rotation direction opposite to the first rotation direction.

[0018] [Clutch device] Fig. 1 is a plan view of the clutch device 100, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. As shown in Figs. 1 and 2, the clutch device 100 is configured to transmit power from a drive source (e.g., an engine) to drive wheels, or to cut off the transmission. The clutch device 100 is configured to rotate in a first rotational direction R1 (counterclockwise in Fig. 1) when transmitting power from the drive source to the drive wheels. The clutch device 100 rotates in the first rotational direction R1 around a rotation axis O.

[0019] The clutch device 100 has a clutch housing 2, a clutch center 3, a pressure plate 4, a clutch portion 5, and a support plate 6. The clutch device 100 also has a plurality of bolts 8 and a plurality of coil springs 9 (an example of a biasing member).

[0020] [Clutch housing] As shown in Fig. 2, the clutch housing 2 has a disk portion 21 and a cylindrical portion 22. The clutch housing 2 is connected to an input gear 10. The input gear 10 is an annular member to which power generated by a drive source (not shown) is input. The input gear 10 meshes with a drive gear (not shown) fixed to a crankshaft on the drive source side.

[0021] The disk portion 21 is connected to the input gear 10 via a plurality of coil springs (not shown). The cylindrical portion 22 extends from the outer circumferential edge portion of the disk portion 21 to a first side in the axial direction. The cylindrical portion 22 has a plurality of notches 221 extending in the axial direction. The plurality of notches 221 are arranged at intervals from one another in the circumferential direction.

[0022] [Clutch center] 3 is a plan view of the clutch center 3 as viewed from a first side in the axial direction, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

[0023] As shown in FIG. 2, the clutch center 3 is disposed on a first axial side with respect to the clutch housing 2. The clutch center 3 is also disposed radially inward with respect to the cylindrical portion 22 of the clutch housing 2. The clutch center 3 is disposed rotatably about a rotation axis O. The clutch center 3 is configured to rotate relative to the clutch housing 2. The clutch center 3 is immovable in the axial direction. However, the pressure plate 4 is movable in the axial direction. Therefore, the clutch center 3 is movable relative to the pressure plate 4 in the axial direction.

[0024] As shown in Figures 2 to 4, the clutch center 3 has a boss portion 31, a first cylindrical portion 32, a plurality of retaining portions 33, a first flange portion 34, a pressure-receiving surface 35, a plurality of first cam portions 36, and a plurality of second cam portions 37.

[0025] The boss portion 31 is cylindrical and extends in the axial direction. The boss portion 31 has, in its center, a splined hole 311 extending in the axial direction. An input shaft (not shown) of the transmission is spline-engaged with the splined hole 311. A thrust plate 14 is provided between the boss portion 31 and the input gear 10 in the axial direction.

[0026] The first cylindrical portion 32 extends in the axial direction. The first cylindrical portion 32 is disposed radially outward of the boss portion 31 so as to surround the boss portion 31. A plurality of grooves (not shown) extending in the axial direction are formed on the outer circumferential surface of the first cylindrical portion 32. The plurality of grooves are disposed at intervals from one another in the circumferential direction.

[0027] The retaining portion 33 is disposed between the boss portion 31 and the first cylindrical portion 32 in the radial direction. The retaining portion 33 connects the boss portion 31 and the first cylindrical portion 32. The retaining portions 33 are disposed at intervals from one another in the circumferential direction. The retaining portion 33 has a retaining recess 331 configured to retain a coil spring. The retaining recess 331 extends in the axial direction. The retaining recess 331 opens to a first side in the axial direction.

[0028] 4, a first cam portion 36 is disposed on the first rotation direction R1 side of the holding portion 33. The first cam portion 36 is formed integrally with the holding portion 33. Furthermore, a second cam portion 37 is disposed on the second rotation direction R2 side of the holding portion 33. The second cam portion 37 and the first cam portion 36 are configured with the holding portion 33 by a single member.

[0029] The first cam portion 36 has a first cam surface 361. The first cam surface 361 faces the first rotation direction R1 and faces the second axial direction side. That is, the first cam surface 361 extends at an angle with respect to the axial direction and the first rotation direction.

[0030] The second cam portion 37 has a second cam surface 371. The second cam surface 371 faces the second rotation direction R2 and faces the first axial side. That is, the second cam surface 371 extends at an incline with respect to the axial direction and the second rotation direction. The second cam surface 371 faces away from the first cam surface 361.

[0031] As shown in FIG. 2, the first flange portion 34 extends radially outward from the first cylindrical portion 32. In detail, the first flange portion 34 extends radially outward from the end portion of the first cylindrical portion 32 on the first axial side. The surface of the first flange portion 34 facing the second axial side becomes the pressure receiving surface 35. In other words, the pressure receiving surface 35 faces the second axial side. The pressure receiving surface 35 is annular and extends in the circumferential direction. The pressure receiving surface 35 is disposed on the outer periphery of the clutch center 3. The pressure receiving surface 35 is disposed on the first axial side with respect to a pressing surface 401 described later.

[0032] The clutch center 3 has a plurality of inner abutment surfaces 38. The inner abutment surfaces 38 face radially inward. As shown in Figs. 2 and 3, the clutch center 3 has a plurality of protruding portions 39 that protrude radially inward from the inner circumferential surface of the first cylindrical portion 32. The multiple protruding portions 39 are arranged at intervals in the circumferential direction. The surfaces of the protruding portions 39 that face radially inward are the inner abutment surfaces 38.

[0033] [Pressure plate] Fig. 5 is a plan view of the pressure plate 4 as viewed from a first side in the axial direction, and Fig. 6 is a perspective view of the pressure plate. As shown in Figs. 2, 4, 5, and 6, the pressure plate 4 is arranged to be movable in the axial direction. That is, the pressure plate 4 is movable relative to the clutch center 3 in the axial direction. The pressure plate 4 is arranged to be rotatable about the rotation axis O.

[0034] The pressure plate 4 has a base portion 41, a plurality of pillar portions 42, a plurality of space portions 43, a plurality of guide walls 45, a plurality of connecting reinforcement portions 46, a plurality of third cam portions 47, a plurality of fourth cam portions 48, a second cylindrical portion 49, a second flange portion 40, and a pressing surface 401.

[0035] As shown in Figs. 5 and 6, the multiple base portions 41 are arranged at intervals from one another in the circumferential direction. The pillar portion 42 extends from the base portion 41 to a first side in the axial direction. The pillar portion 42 passes through the clutch center 3 and extends to the first side in the axial direction. In detail, the pillar portion 42 passes between a pair of adjacent retaining portions 33 and extends to the first side in the axial direction. The pillar portion 42 has a screw hole 421 that passes through in the axial direction (see Fig. 2). The multiple pillar portions 42 are arranged at intervals from one another in the circumferential direction. The pillar portion 42 is cylindrical.

[0036] The space 43 is disposed between the pillar portions 42 in the circumferential direction. The space 43 is also disposed between the base portions 41 in the circumferential direction. The space 43 penetrates the pressure plate 4 in the axial direction. The retaining portion 33 of the clutch center 3 is disposed in this space 43. By disposing the retaining portion 33 in the space 43 in this manner, the retaining portion 33 can be disposed as close to the second axial side as possible. For example, the surface of the retaining portion 33 facing the second axial side is located on the second axial side of the pressure plate 4. Also, the end face of the coil spring 9 on the second axial side is located on the second axial side of the pressing surface 401. As a result, the axial dimension of the coil spring 9 can be increased.

[0037] The opening 44 is disposed in the center of the pressure plate 4. The opening 44 penetrates the pressure plate 4 in the axial direction. The multiple spaces 43 are connected to the opening 44. That is, the multiple spaces 43 communicate with each other via the opening 44. The boss portion 31 of the clutch center 3 is disposed within this opening 44. The pressure plate 4 is disposed with a gap between it and the boss portion 31 in the radial direction. That is, the boss portion 31 of the clutch center 3 is not in contact with the pressure plate 4.

[0038] The guide wall 45 extends from the base portion 41 to a first side in the axial direction. The multiple guide walls 45 are arranged at intervals in the circumferential direction. The guide wall 45 is arranged radially outward relative to the pillar portion 42. The guide wall 45 overlaps with the pillar portion 42 in a radial view. The guide wall 45 has an inner guide surface 451 facing radially inward and an outer guide surface 452 facing radially outward. The inner guide surface 451 is positioned so as to overlap with the outer guide surface 452 in a radial view.

[0039] A tip end of guide wall 45 is disposed on a first axial side with respect to a tip end of pillar portion 42. That is, the axial dimension of guide wall 45 is larger than the axial dimension of pillar portion 42. Of this guide wall 45, a portion disposed on the first axial side with respect to pillar portion 42 is referred to as tip portion 453.

[0040] The guide wall 45 has a circumferential dimension larger than that of the pillar portion 42. Therefore, the pillar portion 42 is completely covered by the guide wall 45 when viewed in the radial direction.

[0041] The outer guide surface 452 of the guide wall 45 abuts against the inner abutment surface 38 of the clutch center 3. In this manner, the outer guide surface 452 abuts against the inner abutment surface 38, whereby the pressure plate 4 is positioned relative to the clutch center 3 in the radial direction.

[0042] The connecting reinforcement portion 46 extends from the base portion 41 to a first side in the axial direction. The connecting reinforcement portion 46 is disposed between the pillar portion 42 and the guide wall 45. The connecting reinforcement portion 46 connects the pillar portion 42 and the guide wall 45. The connecting reinforcement portion 46 has an axial dimension smaller than those of the pillar portion 42 and the guide wall 45. The connecting reinforcement portion 46 also has a circumferential dimension smaller than those of the pillar portion 42 and the guide wall 45. Since the connecting reinforcement portion 46 is connected to the pillar portion 42, it is not possible to erroneously attach the coil spring 9 to the pillar portion 42.

[0043] The third cam portion 47 is disposed on the second rotation direction R2 side with respect to the pillar portion 42. The fourth cam portion 48 is disposed on the first rotation direction R1 side with respect to the pillar portion 42. The third cam portion 47 and the fourth cam portion 48 are formed integrally with the pillar portion 42. In detail, the third cam portion 47, the fourth cam portion 48 and the pillar portion 42 are formed integrally with the pillar portion 42 via the base portion 41. The third cam portion 47, the fourth cam portion 48 and the base portion 41 are formed integrally with the second cylindrical portion 49.

[0044] 4, the third cam portion 47 has a third cam surface 471. The third cam surface 471 faces the first axial side and faces the second rotation direction R2. That is, the third cam surface 471 is inclined with respect to the axial direction and the second rotation direction. The third cam surface 471 faces the first cam surface 361. The third cam surface 471 extends approximately parallel to the first cam surface 361.

[0045] The fourth cam portion 48 has a fourth cam surface 481. The fourth cam surface 481 faces the second axial side and faces the first rotation direction R1. That is, the fourth cam surface 481 is inclined with respect to the axial direction and the first rotation direction. The fourth cam surface 481 faces away from the third cam surface 471. The fourth cam surface 481 faces the second cam surface 371. The fourth cam surface 481 extends approximately parallel to the second cam surface 371.

[0046] 5 and 6, the second cylindrical portion 49 extends in the axial direction. The second cylindrical portion 49 is disposed radially outward relative to the base portions 41, the pillar portions 42, the guide walls 45, etc. so as to surround them.

[0047] The second cylindrical portion 49 has a plurality of grooves 491 formed on its outer circumferential surface. The grooves 491 extend in the axial direction. The plurality of grooves 491 are disposed at intervals from one another in the circumferential direction.

[0048] The second flange portion 40 extends radially outward from the second cylindrical portion 49. A surface of the second flange portion 40 facing the first axial side becomes a pressing surface 401. That is, the pressing surface 401 faces the first axial side. The pressing surface 401 is annular and extends in the circumferential direction. The pressing surface 401 is disposed on the outer periphery of the pressure plate 4.

[0049] 2, the pressing surface 401 is disposed on a second axial side with respect to the pressure-receiving surface 35. When viewed in the axial direction, the pressing surface 401 overlaps with the pressure-receiving surface 35.

[0050] [Clutch section] The clutch portion 5 is configured to transmit and interrupt power between the clutch housing 2 and the clutch center 3. The clutch portion 5 is disposed between the clutch center 3 and the pressure plate 4. In detail, the clutch portion 5 is disposed between the pressure receiving surface 35 and the pressing surface 401.

[0051] The clutch portion 5 has a plurality of first clutch plates 51 and a plurality of second clutch plates 52. The first clutch plates 51 and the second clutch plates 52 are annular. The first clutch plates 51 and the second clutch plates 52 are disposed between the pressure receiving surface 35 and the pressing surface 401. The first clutch plates 51 and the second clutch plates 52 are disposed alternately in the axial direction.

[0052] The first clutch plate 51 is movable in the axial direction but is unable to rotate relative to the clutch housing 2. In other words, the first clutch plate 51 rotates integrally with the clutch housing 2. In detail, a plurality of engagement protrusions that protrude radially outward are formed on the outer periphery of the first clutch plate 51. The engagement protrusions mesh with notches formed in the cylindrical portion 22 of the clutch housing 2. Friction material is affixed to both sides of the first clutch plate 51.

[0053] The second clutch plate 52 has a plurality of engagement protrusions formed at its inner circumferential end portion, which protrude radially inward. The engagement protrusions mesh with grooves (not shown) formed in the first cylindrical portion 32 of the clutch center 3. Therefore, the second clutch plate 52 is movable in the axial direction with respect to the clutch center 3 but is unable to rotate relative thereto. In other words, the second clutch plate 52 rotates integrally with the clutch center 3.

[0054] [Support plate] The support plate 6 is disposed on a first axial side with respect to the pressure plate 4. The support plate 6 is attached to the tip portion (upper end portion in FIG. 2) of the column portion 42. In detail, a bolt 8 fastens the pressure plate 4 and the support plate 6. The bolt 8 passes through a through hole of the support plate 6 and is screwed into a screw hole 421 of the column portion 42. Therefore, the support plate 6 rotates integrally with the pressure plate 4.

[0055] 1 and 7, the support plate 6 is disk-shaped with an opening 61 in the center. The support plate 6 has an outer peripheral surface that abuts against the inner guide surface 451 of the guide wall 45. The outer peripheral surface abuts against the guide wall 45 in this manner, thereby positioning the support plate 6 in the radial direction. The tip surface of the guide wall 45 is located at substantially the same position in the axial direction as the surface of the support plate 6 facing the first axial side.

[0056] The outer peripheral surface of the support plate 6 has a plurality of outer abutment surfaces 62 and a plurality of gripping surfaces 63. The outer peripheral surface of the support plate 6 also has a plurality of non-abutment surfaces 64. The outer abutment surfaces 62 and the non-abutment surfaces 64 are alternately arranged in the circumferential direction. The gripping surface 63 is arranged between the outer abutment surfaces 62 and the non-abutment surfaces 64.

[0057] The outer abutment surface 62 abuts against the guide wall 45. More specifically, the outer abutment surface 62 faces radially outward. This outer abutment surface 62 abuts against an inner guide surface 451 of the guide wall 45 facing radially inward. The outer abutment surface 62 is disposed radially outward with respect to a through hole 65 for passing the bolt 8 therethrough. When viewed in the radial direction, the outer abutment surface 62 overlaps with the through hole 65.

[0058] The grasping surface 63 is disposed adjacent to the outer abutment surface 62 in the circumferential direction. Specifically, the outer abutment surface 62 is disposed between a pair of grasping surfaces 63 in the circumferential direction. The grasping surface 63 is disposed radially inward with respect to the outer abutment surface 62. That is, the grasping surface 63 is formed by recessing the outer peripheral surface of the support plate 6 radially inward. Therefore, the outer diameter of the grasping surface 63 is smaller than the outer diameter of the outer abutment surface 62. The grasping surface 63 does not contact the guide wall 45. Moreover, the grasping surface 63 does not contact any member.

[0059] The gripping surface 63 is a surface that is gripped by a chuck when performing cutting processing, etc. By gripping the gripping surface 63 with a chuck, the outer abutment surface 62 and the inner circumferential surface that defines the opening 61 can be cut simultaneously.

[0060] The non-contact surface 64 does not contact the guide wall 45. Moreover, the non-contact surface 64 does not contact any member. The outer diameter of the non-contact surface 64 is approximately the same as the outer diameter of the outer contact surface 62. The non-contact surface 64 is disposed radially outward from the gripping surface 63. In other words, the outer diameter of the non-contact surface 64 is larger than the outer diameter of the gripping surface 63. The non-contact surface 64 is located at the same position in the circumferential direction as the coil spring 9.

[0061] [Coil spring] 1 and 2, the coil springs 9 are arranged at intervals from the pillar portions 42 in the circumferential direction. In detail, the coil springs 9 and the pillar portions 42 are arranged alternately in the circumferential direction. The coil springs 9 are arranged in a compressed state between the clutch center 3 and the support plate 6 in the axial direction.

[0062] The coil spring 9 has a first end 91 and a second end 92 in the axial direction. The first end 91 is an end on a first side in the axial direction, and the second end 92 is an end on a second side in the axial direction. The first end 91 of the coil spring 9 abuts against the support plate 6. The second end 92 of the coil spring 9 is held by the holding portion 33 of the clutch center 3. More specifically, the second end 92 is disposed within a holding recess 331 of the holding portion 33. With the second end 92 held by the holding portion 33, the coil spring 9 is restricted from moving in the radial and circumferential directions.

[0063] The coil spring 9 biases the pressure plate 4 toward the first side in the axial direction via the support plate 6. As a result, the pressing surface 401 is biased to approach the pressure receiving surface 35, the clutch unit 5 is in the clutch-on state, and power is transmitted. Note that by using the release member to move the pressure plate 4 toward the second side in the axial direction against the biasing force of the coil spring 9, the pressing surface 401 moves away from the pressure receiving surface 35. As a result, the clutch unit 5 is in the clutch-off state, and the transmission of power between the clutch housing 2 and the clutch center 3 is interrupted.

[0064] [Cam mechanism operation] When the pressure plate 4 rotates relative to the clutch center 3 in the first rotation direction R1 during acceleration, the second cam surface 371 and the fourth cam surface 481 press against each other, and the fourth cam portion 48 moves toward the first side in the axial direction. As a result, the pressing surface 401 moves closer to the pressure receiving surface 35, and the coupling force of the clutch portion 5 increases.

[0065] On the other hand, when the clutch center 3 rotates relative to the pressure plate 4 in the first rotation direction R1 during deceleration, the first cam surface 361 and the third cam surface 471 press against each other, and the third cam portion 47 moves to the second axial side. As a result, the pressing surface 401 moves away from the pressure receiving surface 35, and the coupling force of the clutch portion 5 is reduced.

[0066] [Variations] Although the embodiment of the present invention has been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention. Note that the following modifications can basically be applied simultaneously.

[0067] (a) In the above embodiment, the pressure plate 4 has the base portion 41, but the configuration of the pressure plate 4 is not limited to this. For example, the pressure plate 4 does not need to have the base portion 41. In this case, the column portion 42, the guide wall 45, etc. extend from the second cylindrical portion 49 to the first side in the axial direction.

[0068] (b) In the above embodiment, the outer peripheral surface of the support plate 6 has a plurality of non-contact surfaces 64, but the configuration of the support plate 6 is not limited to this. For example, the outer peripheral surface of the support plate 6 does not need to have the non-contact surfaces 64. In this case, the outer contact surfaces 62 and the gripping surfaces 63 are alternately arranged in the circumferential direction. [Explanation of symbols]

[0069] 3: Clutch center 38: Inner contact surface 4: Pressure plate 42:Column part 45: Guide wall 451: Inner guide surface 452: Outer guide surface 453:Tip 46: Connection reinforcement part 5: Clutch section 6: Support plate 61: Opening 62:Outer contact surface 63: Grasping surface 64: Non-contact surface 65: Through hole 9: Coil spring 100: Clutch device

Claims

1. A rotatable clutch device, a rotatably disposed clutch center; a pressure plate that is rotatably arranged and includes a plurality of column portions extending to a first side in the axial direction and a plurality of guide walls including an inner guide surface facing radially inward and disposed radially outward relative to the column portions and extending to the first side in the axial direction; a support plate having an outer circumferential surface that contacts the inner guide surface and is attached to a tip end of the column; a clutch portion disposed between the clutch center and the pressure plate; A clutch device comprising:

2. The support plate is a disk having an opening at its center, The outer peripheral surface of the support plate has a plurality of outer abutment surfaces that abut against the inner guide surface, and a plurality of gripping surfaces that are arranged radially inward relative to the outer abutment surfaces.

2. The clutch device according to claim 1.

3. The support plate has a plurality of through holes arranged in a circumferential direction, The outer abutment surface overlaps with the through hole when viewed in the radial direction.

3. The clutch device according to claim 2.

4. The outer peripheral surface of the support plate has a plurality of non-contact surfaces that do not contact the inner guide surface, The non-contact surface is disposed radially outward relative to the gripping surface, The outer abutment surfaces are alternately arranged with the non-abutment surfaces in the circumferential direction, The gripping surface is disposed between the outer abutment surface and the non-abutment surface.

3. The clutch device according to claim 2.

5. The pressure plate has a connecting reinforcement portion extending in the axial direction to connect the column portion and the guide wall.

2. The clutch device according to claim 1.

6. The clutch center further includes a plurality of biasing members that are arranged at intervals from the column portions in the circumferential direction and are arranged between the clutch center and the support plate.

2. The clutch device according to claim 1.

7. The guide wall has an outer guide surface facing radially outward, The clutch center has an inner abutment surface that faces radially inward and abuts against the outer guide surface.

2. The clutch device according to claim 1.

8. The inner guide surface is positioned so as to overlap with the outer guide surface when viewed in the radial direction.

8. The clutch device according to claim 7.

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