Clutch device

Abstract

To prevent a coil spring from being mounted on a wrong position.SOLUTION: A clutch device includes a first rotary body 3, a second rotary body, a clutch part, and a coil spring. The first rotary body 3 has a pillar part 35 extending in the axial direction. The first rotary body 3 is arranged rotatably. The second rotary body is arranged movably in the axial direction relative to the first rotary body 3. The second rotary body is arranged rotatably. The clutch part is arranged between the first rotary body 3 and the second rotary body. The coil spring is arranged at a peripheral space in the circumferential direction from the pillar part 35. The pillar part 35 has a maximum size L in axial view greater than the inner diameter of the coil spring.SELECTED DRAWING: Figure 3

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 pressure plate or the clutch center has a number of pillar portions. The support plate is attached to the tip of the pillar portions.

[0003] The clutch device also has a number of coil springs to turn the clutch on. The location of the coil springs varies depending on the clutch device. In some cases, the coil springs are arranged so as to cover the pillars, and in other cases, the coil springs are arranged at a distance from the pillars in the circumferential direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6498722 Summary of the Invention [Problem to be solved by the invention]

[0005] In a clutch device in which a coil spring is disposed circumferentially spaced from a pillar portion, if the coil spring is mistakenly disposed so as to cover the pillar portion, the clutch device will not function as designed.

[0006] An object of the present invention is to provide a clutch device that can prevent a coil spring from being attached to an incorrect location. [Means for solving the problem]

[0007] A clutch device according to a first aspect is configured to be rotatable. The clutch device includes a first rotating body, a second rotating body, a clutch portion, and a coil spring. The first rotating body has a column portion extending in the axial direction. The first rotating body is rotatably arranged. The second rotating body is arranged to be movable relative to the first rotating body in the axial direction. The second rotating body is rotatably arranged. The clutch portion is arranged between the first rotating body and the second rotating body. The coil spring is arranged at a distance from the column portion in the circumferential direction. The maximum dimension of the column portion as viewed in the axial direction is larger than the inner diameter of the coil spring.

[0008] By making the maximum dimension of the post greater than the inside diameter of the coil spring, the post cannot be housed within the coil spring, preventing the coil spring from being erroneously placed so as to cover the post.

[0009] The clutch device according to the second aspect is the clutch device according to the first aspect, and is configured as follows: The pillar portion has a pillar main body portion and an interference portion protruding from an outer circumferential surface of the pillar main body portion.

[0010] The clutch device according to a third aspect is the clutch device according to the second aspect, and is configured as follows: The interference portion protrudes in the circumferential direction from the pillar main body portion.

[0011] A clutch device according to a fourth aspect is the clutch device according to the second aspect, and is configured as follows: the first rotor has a guide wall. The guide wall is disposed radially outward from the column portion. The interference portion connects the column main body and the guide wall.

[0012] A clutch device according to a fifth aspect is the clutch device according to the first aspect, and is configured as follows: The pillar portion is cylindrical, and has an outer diameter larger than an inner diameter of the coil spring. Effect of the Invention

[0013] According to the present invention, it is possible to prevent the coil spring from being attached in an incorrect location. [Brief description of the drawings]

[0014] [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. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 11 is a cross-sectional view of a clutch device according to a modified example. [Figure 11] FIG. 11 is a plan view of a pressure plate according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The clutch device 100 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.

[0016] [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 a drive wheel or to cut off the transmission. The clutch device 100 is configured to transmit power in a first rotational direction R1 (counterclockwise in FIG. 1). The clutch device 100 is configured to be rotatable. In detail, the clutch device 100 rotates in the first rotational direction R1 around a rotation axis O.

[0017] The clutch device 100 has a clutch housing 2, a clutch center 3 (an example of a first rotating body), a pressure plate 4 (an example of a second rotating body), 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.

[0018] [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 an engine (not shown) is input. The input gear 10 meshes with a drive gear (not shown) fixed to a crankshaft on the engine side.

[0019] 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 of the disk portion 21 to a first side in the axial direction. The cylindrical portion 22 has a plurality of notches (not shown) extending in the axial direction. The plurality of notches are arranged at intervals from one another in the circumferential direction.

[0020] [Clutch center] Fig. 3 is a plan view of the clutch center 3 as viewed from a first side in the axial direction, Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 1, and Fig. 5 is an enlarged perspective view of the clutch center 3. In Fig. 4, for ease of illustration, illustrations of components other than the clutch center 3, the pressure plate 4, the support plate 6, and the bolts 8 are omitted.

[0021] 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 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. As shown in FIG. 2 to FIG. 5, the clutch center 3 has a plurality of base portions 31, a first cylindrical portion 32, a first flange portion 33, a pressure receiving surface 34, a plurality of pillar portions 35, a first boss portion 36, a plurality of first cam portions 37, a plurality of second cam portions 38, and a plurality of reinforcing walls 39.

[0022] 3, the multiple base portions 31 are arranged at intervals from one another in the circumferential direction. The base portions 31 are arranged between the first cylindrical portion 32 and the first boss portion 35 in the radial direction. The base portions 31 connect the first cylindrical portion 32 and the first boss portion 35.

[0023] The clutch center 3 has a plurality of openings 311 penetrating in the axial direction. The plurality of openings 311 are arranged at intervals from one another in the circumferential direction. The base portion 31 and the openings 311 are arranged alternately in the circumferential direction. The openings 311 overlap with a second cam surface 381, which will be described later, when viewed in the axial direction. Therefore, the second cam surface 381 is exposed to a second axial side through the openings 311.

[0024] 2 and 3, the first cylindrical portion 32 extends in the axial direction. A plurality of grooves 321 extending in the axial direction are formed on the outer circumferential surface of the first cylindrical portion 32. The plurality of grooves 321 are disposed at intervals from one another in the circumferential direction.

[0025] The first flange portion 33 extends radially outward from the first cylindrical portion 32. In detail, the first flange portion 33 extends radially outward from the end portion on the second axial side of the first cylindrical portion 32. The surface of the first flange portion 33 facing the first axial side becomes the pressure-receiving surface 34. In other words, the pressure-receiving surface 34 faces the first axial side. The pressure-receiving surface 34 is annular and extends in the circumferential direction. The pressure-receiving surface 34 is disposed on the outer periphery of the clutch center 3.

[0026] The pillar portion 35 extends from the base portion 31 to a first side in the axial direction. The pillar portion 35 has a screw hole 355 penetrating in the axial direction. The screw hole 355 is also formed in the base portion 31. The screw hole 355 communicates with a through hole 352 formed in the base portion 31. The multiple pillar portions 35 are arranged at intervals from one another in the circumferential direction.

[0027] The maximum dimension L of the pillar portion 35 as viewed in the axial direction is larger than the inner diameter of the coil spring 9. Specifically, the pillar portion 35 has a pillar main body portion 351 and an interference portion 352. The pillar main body portion 351 is cylindrical and extends in the axial direction. The interference portion 352 protrudes from the outer circumferential surface of the pillar main body portion 351.

[0028] The total dimension of the dimension of the interference part 352 in the protruding direction and the outer diameter of the column main body part 351 is the maximum dimension L of the column part 35 in the axial direction in this embodiment. In this embodiment, the interference part 352 protrudes from the column main body part 351 in the circumferential direction. Therefore, the total dimension of the dimension of the interference part 352 in the circumferential direction and the outer diameter of the column main body part 351 is the maximum dimension L of the column part 35 in the axial direction in this embodiment. The interference part 352 may protrude in the radial direction. In this case, the total dimension of the dimension of the interference part 352 in the radial direction and the outer diameter of the column main body part 351 is the maximum dimension L of the column part 35 in the axial direction.

[0029] According to this configuration, even if an attempt is made to attach the coil spring 9 to the pillar portion 35, the interference portion 352 interferes with the coil spring 9 and makes it impossible to attach the coil spring 9. This makes it possible to prevent the coil spring 9 from being erroneously attached to the pillar portion 35.

[0030] The interference portion 352 extends in the axial direction. The interference portion 352 has an axial dimension smaller than that of the pillar main body portion 351. Specifically, the tip of the interference portion 352 is located on the second axial side relative to the tip of the pillar main body portion 351.

[0031] The first boss portion 36 is disposed radially inward with respect to the base portion 31 and the column portion 35. The first boss portion 36 is disposed radially inward with respect to the first cylindrical portion 32. As shown in FIG. 6, the clutch center 3 has a plurality of ribs 361 that connect the first boss portion 36 and the first cylindrical portion 32. The ribs 361 extend radially. The ribs 361 are disposed on a second axial side with respect to the first cam portion 37 and the second cam portion 38. Of the plurality of ribs 361, some of the ribs 361 are connected to the first cam portion 37, and the remaining ribs 361 are connected to the second cam portion 38.

[0032] The first boss portion 36 extends in the axial direction. The base portion 31 extends radially outward from the outer circumferential surface of the first boss portion 36. The base portion 31 also extends from the first boss portion 36 to a first side in the axial direction.

[0033] The first boss portion 36 has a spline hole 36a extending in the axial direction at its center. An input shaft of a transmission (not shown) is spline-engaged with the spline hole 36a. A thrust plate 14 is provided between the first boss portion 36 and the input gear 10 in the axial direction. The clutch center 3 does not move in the axial direction.

[0034] 4, the first cam portion 37 is disposed on the first rotation direction R1 side with respect to the pillar portion 35. In detail, the first cam portion 37 is disposed on the first rotation direction R1 side with respect to the base portion 31. The first cam portion 37 is integrally formed with the base portion 31 as a single member.

[0035] The second cam portion 38 is disposed on the second rotation direction R2 side with respect to the pillar portion 35. In detail, the second cam portion 38 is disposed in the second rotation direction R2 with respect to the base portion 31. The second cam portion 38 is integrally formed with the base portion 31 as a single member.

[0036] The first cam portion 37 and the second cam portion 38 are integrally formed as one member with the pillar portion 35. In detail, the first cam portion 37 and the second cam portion 38 are integrally formed as one member with the pillar portion 35 via the base portion 31.

[0037] The base portion 31, the first cam portion 37, the second cam portion 38, and the pillar portion 35 are disposed radially inwardly with a gap between them and the first cylindrical portion 32. Therefore, a valley portion 301 extending in the circumferential direction is formed between the base portion 31, the first cam portion 37, the second cam portion 38, and the pillar portion 35 and the first cylindrical portion 32.

[0038] The first cam portion 37 has a first cam surface 371. The first cam surface 371 faces a first axial side and faces a first rotational direction R1. That is, the first cam surface 371 extends at an angle with respect to the axial direction and the first rotational direction.

[0039] The second cam portion 38 has a second cam surface 381. The second cam surface 381 faces toward the second axial side and also faces toward the second rotation direction R2. That is, the second cam surface 381 extends at an incline with respect to the axial direction and the second rotation direction. The second cam surface 381 faces away from the first cam surface 371.

[0040] As shown in FIG. 5, the reinforcing wall 39 is disposed radially inward with respect to the second cam portion 38. The reinforcing wall 39 connects the second cam portion 38 and the first boss portion 36. Specifically, the reinforcing wall 39 extends from the first boss portion 36 to a first side in the axial direction. The reinforcing wall 39 is connected to a radially inner surface of the second cam portion 38. The reinforcing wall 39 is integrally formed with the first boss portion 36 and the second cam portion 38. Specifically, the reinforcing wall 39, the first boss portion 36, and the second cam portion 38 are integrally formed as a single member.

[0041] [Pressure plate] Fig. 7 is a bottom view of the pressure plate as viewed from the second axial side, and Fig. 8 is a plan view of the pressure plate as viewed from the first axial side. As shown in Figs. 2, 4, 7, and 8, 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. The pressure plate 4 is arranged between the clutch center 3 and the support plate 6 in the axial direction.

[0042] The pressure plate 4 has a second boss portion 41, a plurality of third cam portions 43, a plurality of fourth cam portions 44, a plurality of connecting portions 45, a plurality of retaining portions 46, a second flange portion 47, a pressing surface 48, and a second cylindrical portion 49.

[0043] 7 and 8, the second boss portion 41 is cylindrical and extends in the axial direction. The second boss portion 41 is configured to allow a release mechanism (not shown) to be attached. The third cam portion 43 and the fourth cam portion 44 are attached to the outer circumferential surface of the second boss portion 41.

[0044] 4, the third cam portion 43 is disposed on the first rotation direction R1 side with respect to the first cam portion 37. In addition, the third cam portion 43 is disposed on the first axial side with respect to the first cam portion 37.

[0045] The fourth cam portion 44 is disposed on the second rotation direction R2 side with respect to the second cam portion 38. In addition, the fourth cam portion 44 is disposed on the first axial side with respect to the second cam portion 38.

[0046] As shown in Fig. 7, the third cam portion 43 and the fourth cam portion 44 are arranged with a gap therebetween in the circumferential direction. The connecting portion 45 connects the third cam portion 43 and the fourth cam portion 44. The connecting portion 45 extends in the circumferential direction between the pillar portion 35, the first cam portion 37, the second cam portion 38, and the first cylindrical portion 32. That is, as shown in Fig. 2, the connecting portion 45 extends in the circumferential direction within the valley portion 301. The third cam portion 43 and the fourth cam portion 44 are arranged radially inward of the connecting portion 45.

[0047] 4, the third cam portion 43 has a third cam surface 431. The third cam surface 431 faces the second rotation direction R2 and also faces the second axial side. The third cam surface 431 faces the first cam surface 371. The third cam surface 431 extends approximately parallel to the first cam surface 371.

[0048] The fourth cam portion 44 has a fourth cam surface 441. The fourth cam surface 441 faces the first rotation direction R1 and faces the first axial side. The fourth cam surface 441 faces the second cam surface 381. The fourth cam surface 441 extends approximately parallel to the second cam surface 381.

[0049] 7 and 8, the retaining portion 46 extends radially outward from the second boss portion. The retaining portions 46 are arranged at intervals from one another in the circumferential direction. The retaining portion 46 has a retaining recess 461 configured to retain a coil spring. The retaining recess 461 extends in the axial direction. The retaining recess 461 opens to a first side in the axial direction.

[0050] A fourth cam portion 44 is disposed on the first rotation direction R1 side of the holding portion 46. The fourth cam portion 44 is formed integrally with the holding portion 46. Furthermore, a third cam portion 43 is disposed on the second rotation direction R2 side of the holding portion 46. The third cam portion 43 and the fourth cam portion 44 adjacent to each other via the holding portion 46 are different pairs. The third cam portion 43 and the fourth cam portion 44 are configured with the holding portion 46 by a single member.

[0051] The second flange portion 47 extends radially outward from the third cam portion 43, the fourth cam portion 44, the connecting portion 45, and the retaining portion 46. A surface of the second flange portion 47 facing the second axial side becomes a pressing surface 48. In other words, the pressing surface 48 faces the second axial side. The pressing surface 48 is annular and extends in the circumferential direction. The pressing surface 48 is disposed on the outer periphery of the pressure plate 4.

[0052] 2, the pressing surface 48 is disposed on a first axial side with respect to the pressure-receiving surface 34. When viewed in the axial direction, the pressing surface 48 overlaps with the pressure-receiving surface 34.

[0053] 7, the second cylindrical portion 49 extends from the inner peripheral end of the second flange portion 47 to the second side in the axial direction. A plurality of grooves 491 extending in the axial direction are formed on the outer peripheral surface of the second cylindrical portion 49. The plurality of grooves 491 are arranged at intervals from one another in the circumferential direction.

[0054] [Clutch section] 2, 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 34 and the pressing surface 48.

[0055] 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 34 and the pressing surface 48. The first clutch plates 51 and the second clutch plates 52 are disposed alternately in the axial direction.

[0056] 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.

[0057] 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 321 formed in 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.

[0058] [Support plate] The support plate 6 is annular and extends in the circumferential direction. The support plate 6 is disposed on a first axial side with respect to the clutch center 3. The support plate 6 is attached to the tip end portion (upper end portion in FIG. 2) of the column portion 35. In detail, the bolt 8 fastens the clutch center 3 and the support plate 6. Therefore, the support plate 6 rotates integrally with the clutch center 3.

[0059] Fig. 9 is a cross-sectional perspective view of the support plate 6. As shown in Fig. 9, the support plate 6 has a plurality of attachment portions 61, a plurality of contact portions 62, a plurality of protrusions 63, and a plurality of reinforcing portions 64.

[0060] The mounting portion 61 is a portion that is attached to the column portion 35. The mounting portion 61 has a through hole 611. The bolt 8 is screwed into the screw hole 355 of the column portion 35 through the through hole 611 of the mounting portion 61.

[0061] The abutment portion 62 is a portion that abuts against the coil spring 9. The abutment portion 62 abuts against the axial first side end of the coil spring 9 on a surface facing the axial second side. The abutment portion 62 is disposed at an interval from the attachment portion 61 in the circumferential direction. In detail, the attachment portions 61 and the abutment portions 62 are disposed alternately in the circumferential direction.

[0062] The protruding portion 63 is disposed radially outward from the abutting portion 62. The multiple protruding portions 63 are disposed at intervals from one another in the circumferential direction. The protruding portion 63 protrudes toward the second axial side. The protruding portion 63 can restrict the first axial side end of the coil spring 9 from moving radially outward. The protruding portion 63 is formed, for example, by pressing the outer periphery of a disk toward the second axial side.

[0063] The reinforcing portion 64 is disposed radially outward from the mounting portion 61. The reinforcing portion 64 is configured to improve the bending rigidity of the support plate 6. In detail, the support plate 6 is fixed by mounting the mounting portion 61 to the column portion 35, while the abutting portion 62 is pressed toward the first axial direction by the coil spring 9. For this reason, there is a risk that bending deformation will occur around the portion radially outward from the mounting portion 61. In response to this, the reinforcing portion 64 is formed radially outward from the mounting portion 61 to improve the bending rigidity, thereby making it possible to suppress the bending deformation.

[0064] The support plate 6 has a plurality of outer circumferential portions 65 disposed radially outward from the mounting portion 61. Like the protruding portions 63, the outer circumferential portions 65 are located on the second axial side relative to other portions of the support plate 6. For example, the outer circumferential portions 65 can be positioned on the second axial side relative to other portions by press working. The outer circumferential portions 65 are disposed at intervals from the protruding portions 63 in the circumferential direction.

[0065] Since the outer peripheral portion 65 is located on the second axial side relative to other portions of the support plate 6, a step is formed between the outer peripheral portion 65 and the mounting portion 61. The step extends in the circumferential direction. The reinforcing portion 64 is constituted by this step. The multiple outer peripheral portions 65 and the multiple protruding portions 63 are alternately arranged in the circumferential direction. The outer peripheral portions 65 are arranged at intervals from the protruding portions 63 in the circumferential direction. In other words, the step formed by the outer peripheral portion 65 and the step formed by the protruding portions 63 are arranged at intervals from each other in the circumferential direction.

[0066] [Coil spring] As shown in Figs. 1 and 2, the coil spring 9 is disposed at an interval from the pillar portion 35 in the circumferential direction. In detail, a plurality of coil springs 9 and a plurality of pillar portions 35 are disposed alternately in the circumferential direction. The coil spring 9 is disposed in a compressed state in the axial direction between the pressure plate 4 and the support plate 6. The end of the coil spring 9 on the second axial side is disposed within the retaining recess 461 of the pressure plate 4. The coil spring 9 is held by the retaining recess 461, so that movement in the radial and circumferential directions is restricted.

[0067] The coil spring 9 biases the pressure plate 4 toward the second side in the axial direction. As a result, the pressing surface 48 is biased to approach the pressure receiving surface 34, 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 first side in the axial direction against the biasing force of the coil spring 9, the pressing surface 48 moves away from the pressure receiving surface 34. 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.

[0068] [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 381 and the fourth cam surface 441 press against each other, and the fourth cam portion 44 moves to the second side in the axial direction. As a result, the pressing surface 48 moves closer to the pressure receiving surface 34, and the coupling force of the clutch portion 5 increases.

[0069] 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 371 and the third cam surface 431 press against each other, and the third cam portion 43 moves to the first side in the axial direction. As a result, the pressing surface 48 moves away from the pressure receiving surface 34, and the coupling force of the clutch portion 5 is reduced.

[0070] [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.

[0071] (a) In the above embodiment, the pillar portion 35 has the pillar main body portion 351 and the interference portion 352, but the configuration of the pillar portion 35 is not limited to this. For example, the pillar portion 35 does not need to have the interference portion 352. In this case, the pillar portion 35 is cylindrical. Therefore, the maximum dimension of the pillar portion 35 as viewed in the axial direction is the outer diameter of the pillar portion 35. The outer diameter of the pillar portion 35 is larger than the inner diameter of the coil spring 9.

[0072] (b) In the above embodiment, the clutch center 3 has a column portion 35 extending to the first side in the axial direction, i.e., the clutch center 3 corresponds to the first rotating body of the present invention, and the pressure plate 4 corresponds to the second rotating body of the present invention, but the configuration of the clutch device 100 is not limited to this. Specifically, as shown in Fig. 10, the pressure plate 4 may have the column portion 35. In other words, the clutch device 100 may be configured so that the pressure plate 4 corresponds to the first rotating body of the present invention, and the clutch center 3 corresponds to the second rotating body of the present invention.

[0073] In this modification, the clutch center 3, which is the second rotating body, does not move in the axial direction, but the pressure plate 4, which is the first rotating body, moves in the axial direction. That is, the clutch center 3, which is the second rotating body, is capable of moving in the axial direction relative to the pressure plate 4, which is the first rotating body.

[0074] (c) As shown in Figs. 10 and 11, the pressure plate 4, which is the first rotating body, may further have a plurality of guide walls 401. The guide walls 401 extend in the axial direction. The guide walls 401 are disposed radially outward relative to the column portions 35. The guide walls 401 overlap with the column portions 35 in a radial view. The guide walls 401 have an inner guide surface 402 facing radially inward and an outer guide surface 403 facing radially outward. The inner guide surface 402 is positioned so as to overlap with the outer guide surface 403 in a radial view.

[0075] A tip of the guide wall 401 is disposed on a first axial side relative to a tip of the pillar portion 35. That is, the axial dimension of the guide wall 401 is larger than the axial dimension of the pillar portion 35. The guide wall 401 has a larger circumferential dimension than the pillar portion 35. Therefore, the pillar portion 35 is completely covered by the guide wall 401 when viewed in the radial direction.

[0076] An inner guide surface 402 of the guide wall 401 abuts against the support plate 6. In this manner, by the inner guide surface 402 abutting against the support plate 6, the support plate 6 is positioned relative to the pressure plate 4 in the radial direction.

[0077] An outer guide surface 403 of the guide wall 401 abuts against the clutch center 3. In this manner, the outer guide surface 403 abuts against the clutch center 3, whereby the pressure plate 4 is positioned relative to the clutch center 3 in the radial direction.

[0078] The interference portion 352 extends in the axial direction between the column main body portion 351 and the guide wall 401. The interference portion 352 connects the column main body portion 351 and the guide wall 401. The interference portion 352 protrudes from the column main body portion 351 radially outward. [Explanation of symbols]

[0079] 3: Clutch center 35: Pillar part 351: Pillar body 352: Interference part 4: Pressure plate 401: Guide wall 5: Clutch section 9: Coil spring 100: Clutch device

Claims

1. A rotatable clutch device, a first rotor having a column portion extending in an axial direction and rotatably disposed; A second rotor that is rotatably disposed and axially movable relative to the first rotor; a clutch portion disposed between the first rotating body and the second rotating body; a coil spring arranged at a distance from the column portion in the circumferential direction; Equipped with The column portion has a maximum dimension in an axial view that is larger than an inner diameter of the coil spring. Clutch device.

2. The column portion has a column main body portion and an interference portion protruding from an outer peripheral surface of the column main body portion.

2. The clutch device according to claim 1.

3. The interference portion protrudes in a circumferential direction from the pillar main body portion.

3. The clutch device according to claim 2.

4. The first rotating body has a guide wall disposed radially outward from the column portion, The interference portion connects the column main body portion and the guide wall.

3. The clutch device according to claim 2.

5. The pillar portion is cylindrical and has an outer diameter larger than an inner diameter of the coil spring.

2. The clutch device according to claim 1.

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