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 Art]

[0002] Generally, in motorcycles such as two-wheeled motor vehicles and buggies, a clutch device is used to transmit or cut off power from an engine to a transmission. The clutch device includes 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 plurality of pillar portions. The support plate is attached to a tip end of the pillar portions.

[0003] Further, the clutch device has a plurality of coil springs to bring the clutch portion into a clutch-on state. The arrangement position of the coil springs varies depending on the clutch device: in some cases the coil springs are arranged so as to cover the pillar portions, and in other cases the coil springs are arranged at intervals in the circumferential direction from the pillar portions. [Prior Art Literature] [Patent Documents]

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

[0005] In a clutch device in which coil springs are arranged at intervals in the circumferential direction from pillar portions, if the coil springs are mistakenly arranged so as to cover the pillar portions, the clutch device will not function as designed.

[0006] An object of the present invention is to provide a clutch device that can prevent coil springs from being attached to wrong positions. [Means for Solving the Problem]

[0007] The clutch device according to the first embodiment is configured to be rotatable. This clutch device comprises a first rotating body, a second rotating body, a clutch section, and a coil spring. The first rotating body has a column extending in the axial direction. The first rotating body is rotatably positioned. The second rotating body is positioned to be axially relative to the first rotating body. The clutch section is positioned between the first rotating body and the second rotating body. The coil spring is positioned at a distance from the column in the circumferential direction. The maximum dimension of the column in an axial view is greater than the inner diameter of the coil spring.

[0008] In this way, by making the maximum dimension of the column larger than the inner diameter of the coil spring, the column cannot be housed inside the coil spring. This prevents the coil spring from being mistakenly positioned to cover the column.

[0009] The clutch device according to the second embodiment is configured as follows in the clutch device according to the first embodiment: The column portion has a column body portion and an interference portion that protrudes from the outer surface of the column body portion.

[0010] The clutch device according to the third embodiment is configured as follows in the clutch device according to the second embodiment: The interfering portion protrudes circumferentially from the column body.

[0011] The clutch device according to the fourth embodiment is configured as follows in the clutch device according to the second embodiment. The first rotating body has a guide wall. The guide wall is positioned radially outward with respect to the column portion. The interfering portion connects the column body portion and the guide wall.

[0012] The clutch device according to the fifth embodiment is configured as follows in the clutch device according to the first embodiment: The column portion is cylindrical. The column portion has an outer diameter larger than the inner diameter of the coil spring. [Effects of the Invention]

[0013] According to the present invention, attachment of a coil spring to an incorrect position can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] [Figure 1] A plan view of a clutch device. [Figure 2] A cross-sectional view taken along line II-II in FIG. 1. [Figure 3] A plan view of a clutch center. [Figure 4] A cross-sectional view taken along line IV-IV in FIG. 1. [Figure 5] A cross-sectional perspective view of a clutch center. [Figure 6] A bottom view of a clutch center. [Figure 7] A bottom view of a pressure plate. [Figure 8] A plan view of a pressure plate. [Figure 9] A cross-sectional perspective view of a support plate. [Figure 10] A cross-sectional view of a clutch device according to a modified example. [Figure 11] A plan view of a pressure plate according to a modified example. DESCRIPTION OF EMBODIMENTS

[0015] Hereinafter, a clutch device 100 according to the present embodiment will be described with reference to the drawings. In the following description, the axial direction refers to the direction in which the rotation axis O of the clutch device 100 extends. Further, 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] Figure 1 is a plan view of the clutch device 100, and Figure 2 is a cross-sectional view taken along the line II-II in Figure 1. As shown in Figures 1 and 2, the clutch device 100 is configured to transmit power from a drive source (for example, an engine) to drive wheels, and cut off the transmission. The clutch device 100 is configured to transmit power in the first rotation direction R1 (counterclockwise in Figure 1). The clutch device 100 is configured to be rotatable. Specifically, the clutch device 100 rotates around the rotation axis O in the first rotation direction R1.

[0017] The clutch device 100 includes 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 includes a plurality of bolts 8 and a plurality of coil springs 9.

[0018] [Clutch Housing] As shown in Figure 2, the clutch housing 2 has a disk portion 21 and a cylindrical portion 22. The clutch housing 2 is connected to the 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 peripheral edge of the disk portion 21 to the first axial side. The cylindrical portion 22 has a plurality of axially extending notches (not shown). The plurality of notches are spaced apart from each other in the circumferential direction.

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

[0021] As shown in Figure 2, the clutch center 3 is positioned on the first axial side relative to the clutch housing 2. Furthermore, the clutch center 3 is positioned radially inward relative to the cylindrical portion 22 of the clutch housing 2. The clutch center 3 is rotatably positioned around the rotation axis O. The clutch center 3 is configured to rotate relative to the clutch housing 2. As shown in Figures 2 to 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 column 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] As shown in Figure 3, the multiple base portions 31 are arranged with spacing between them in the circumferential direction. The base portions 31 are arranged radially between the first cylindrical portion 32 and the first boss portion 36. 36 It connects and .

[0023] The clutch center 3 has a plurality of openings 311 that penetrate in the axial direction. The plurality of openings 311 are spaced apart from each other in the circumferential direction. The base portion 31 and the openings 311 are arranged alternately in the circumferential direction. The openings 311 overlap with the second cam surface 381, which will be described later, in an axial view. Therefore, the second cam surface 381 is exposed to the second side in the axial direction through the openings 311.

[0024] As shown in Figures 2 and 3, the first cylindrical portion 32 extends in the axial direction. Multiple grooves 321 extending in the axial direction are formed on the outer circumferential surface of the first cylindrical portion 32. These multiple grooves 321 are spaced apart from each other in the circumferential direction.

[0025] The first flange portion 33 extends radially outward from the first cylindrical portion 32. More specifically, the first flange portion 33 extends radially outward from the second axial end 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. That is, the pressure-receiving surface 34 faces the first axial side. The pressure-receiving surface 34 is an annular shape extending in the circumferential direction. The pressure-receiving surface 34 is located on the outer circumference of the clutch center 3.

[0026] The column portion 35 extends from the base portion 31 in the first axial direction. The column portion 35 has a screw hole 355 that penetrates it in the axial direction. The screw hole 355 is also formed in the base portion 31. Furthermore, the screw hole 355 communicates with a through hole 352 formed in the base portion 31. Multiple column portions 35 are arranged at intervals from each other in the circumferential direction.

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

[0028] The sum of the dimension of the interfering portion 352 in the direction of protrusion and the outer diameter of the column body portion 351 is the maximum dimension L of the column portion 35 in the axial view in this embodiment. In this embodiment, the interfering portion 352 protrudes from the column body portion 351 in the circumferential direction. Therefore, the sum of the dimension of the interfering portion 352 in the circumferential direction and the outer diameter of the column body portion 351 is the maximum dimension L of the column portion 35 in the axial view in this embodiment. The interfering portion 352 may also protrude in the radial direction. In this case, the sum of the dimension of the interfering portion 352 in the radial direction and the outer diameter of the column body portion 351 is the maximum dimension L of the column portion 35 in the axial view.

[0029] With this configuration, even if an attempt is made to attach the coil spring 9 to the column portion 35, the interference portion 352 interferes with the coil spring 9, making attachment impossible. Therefore, it is possible to prevent the coil spring 9 from being mistakenly attached to the column portion 35.

[0030] The interfering portion 352 extends in the axial direction. The interfering portion 352 has a smaller axial dimension than the column body portion 351. Specifically, the tip of the interfering portion 352 is located on the second axial side compared to the tip of the column body portion 351.

[0031] The first boss portion 36 is positioned radially inward relative to the base portion 31 and the column portion 35. The first boss portion 36 is also positioned radially inward relative to the first cylindrical portion 32. As shown in Figure 6, the clutch center 3 has a plurality of ribs 361 connecting the first boss portion 36 and the first cylindrical portion 32. The ribs 361 extend radially. The ribs 361 are positioned on the second axial side relative to the first cam portion 37 and the second cam portion 38. Of the plurality of ribs 361, some 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 axially in the first direction from the first boss portion 36.

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

[0034] As shown in Figure 4, the first cam portion 37 is positioned on the R1 side in the first rotational direction relative to the column portion 35. More specifically, the first cam portion 37 is positioned on the R1 side in the first rotational direction relative to the base portion 31. The first cam portion 37 is integrally formed with the base portion 31 as a single component.

[0035] The second cam portion 38 is positioned on the second rotational direction R2 side relative to the column portion 35. More specifically, the second cam portion 38 is positioned in the second rotational direction R2 relative to the base portion 31. The second cam portion 38 is integrally formed with the base portion 31 as a single component.

[0036] The first cam portion 37 and the second cam portion 38 are integrally formed with the column portion 35 as a single component. More specifically, the first cam portion 37 and the second cam portion 38 are integrally formed with the column portion 35 as a single component via the base portion 31.

[0037] The base portion 31, the first cam portion 37, the second cam portion 38, and the column portion 35 are arranged radially inward with a gap between them and the first cylindrical portion 32. As a result, 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 column 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 the first axial direction and the first rotational direction R1. That is, the first cam surface 371 extends at an inclination 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 the second axial direction and the second rotational direction R2. That is, the second cam surface 381 extends at an inclination with respect to the axial direction and the second rotational direction. The second cam surface 381 faces opposite to the first cam surface 371.

[0040] As shown in Figure 5, the reinforcing wall 39 is positioned radially inward relative to the second cam portion 38. The reinforcing wall 39 connects the second cam portion 38 and the first boss portion 36. More specifically, the reinforcing wall 39 extends from the first boss portion 36 to the first axial side. The reinforcing wall 39 is connected to the radially inward 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. More specifically, the reinforcing wall 39, the first boss portion 36, and the second cam portion 38 are integrally formed as a single component.

[0041] [Pressure Plate] Figure 7 is a bottom view of the pressure plate viewed from the second axial side, and Figure 8 is a top view of the pressure plate viewed from the first axial side. As shown in Figures 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 axially movable relative to the clutch center 3. The pressure plate 4 is arranged to be rotatable about the rotation axis O. In the axial direction, the pressure plate 4 is positioned between the clutch center 3 and the support plate 6.

[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 holding portions 46, a second flange portion 47, a pressing surface 48, and a second cylindrical portion 49.

[0043] As shown in Figures 7 and 8, the second boss portion 41 is cylindrical and extends in the axial direction. The second boss portion 41 is configured to accommodate a release mechanism (not shown). 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] As shown in Figure 4, the third cam portion 43 is positioned on the first rotational direction R1 side relative to the first cam portion 37. Furthermore, the third cam portion 43 is positioned on the first axial side relative to the first cam portion 37.

[0045] The fourth cam portion 44 is positioned on the second rotational direction R2 side relative to the second cam portion 38. Furthermore, the fourth cam portion 44 is positioned on the first axial side relative to the second cam portion 38.

[0046] As shown in Figure 7, the third cam portion 43 and the fourth cam portion 44 are spaced apart 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 circumferentially between the column portion 35, the first cam portion 37 and the second cam portion 38 and the first cylindrical portion 32. That is, as shown in Figure 2, the connecting portion 45 extends circumferentially within the valley portion 301. The third cam portion 43 and the fourth cam portion 44 are positioned radially inward from the connecting portion 45.

[0047] As shown in Figure 4, the third cam portion 43 has a third cam surface 431. The third cam surface 431 faces the second rotational direction R2 and also faces the second axial direction. The third cam surface 431 faces the first cam surface 371. The third cam surface 431 extends substantially 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 rotational direction R1 and also faces the first axial direction. The fourth cam surface 441 faces the second cam surface 381. The fourth cam surface 441 extends substantially parallel to the second cam surface 381.

[0049] As shown in Figures 7 and 8, the holding portion 46 is the second boss portion 41 It extends radially outward from the surface. Multiple retaining parts 46 are spaced apart from each other in the circumferential direction. Each retaining part 46 has a retaining recess 461 configured to hold a coil spring. The retaining recess 461 extends axially. The retaining recess 461 opens to a first axial side.

[0050] A fourth cam portion 44 is positioned on the first rotation direction R1 side of the holding portion 46. The fourth cam portion 44 is integrally formed with the holding portion 46. A third cam portion 43 is positioned on the second rotation direction R2 side of the holding portion 46. Note that the third cam portion 43 and the fourth cam portion 44, which are adjacent to each other via the holding portion 46, are different pairs. The third cam portion 43 and the fourth cam portion 44 are formed from a single component with the holding portion 46.

[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 holding portion 46. The surface of the second flange portion 47 facing the second axial side becomes the pressing surface 48. That is, the pressing surface 48 faces the second axial side. The pressing surface 48 is an annular shape extending in the circumferential direction. The pressing surface 48 is located on the outer circumference of the pressure plate 4.

[0052] As shown in Figure 2, the pressing surface 48 is positioned on the first axial side relative to the pressure-receiving surface 34. In an axial view, the pressing surface 48 overlaps with the pressure-receiving surface 34.

[0053] As shown in Figure 7, the second cylindrical portion 49 extends axially from the inner circumferential end of the second flange portion 47 to the second side. Multiple grooves 491 extending in the axial direction are formed on the outer circumferential surface of the second cylindrical portion 49. These multiple grooves 491 are spaced apart from each other in the circumferential direction.

[0054] [Clutch section] As shown in Figure 2, the clutch unit 5 is configured to transmit or interrupt power between the clutch housing 2 and the clutch center 3. The clutch unit 5 is located between the clutch center 3 and the pressure plate 4. More specifically, the clutch unit 5 is located between the pressure receiving surface 34 and the pressing surface 48.

[0055] The clutch section 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 in shape. The first clutch plates 51 and the second clutch plates 52 are arranged between the pressure receiving surface 34 and the pressing surface 48. The first clutch plates 51 and the second clutch plates 52 are arranged alternately in the axial direction.

[0056] The first clutch plate 51 is axially movable relative to the clutch housing 2 but cannot rotate relative to it. That is, the first clutch plate 51 rotates integrally with the clutch housing 2. In detail, a plurality of engaging protrusions projecting radially outward are formed on the outer circumference of the first clutch plate 51. These engaging protrusions engage with notches formed in the cylindrical portion 22 of the clutch housing 2. Friction material is attached to both sides of the first clutch plate 51.

[0057] The second clutch plate 52 has a plurality of engaging protrusions that project radially inward at its inner circumferential end. These engaging protrusions engage with grooves 321 formed in the clutch center 3. Therefore, the second clutch plate 52 is axially movable relative to the clutch center 3 but cannot rotate relative to it. In other words, the second clutch plate 52 rotates integrally with the clutch center 3.

[0058] [Support plate] The support plate 6 is annular in shape and extends in the circumferential direction. The support plate 6 is positioned on the first axial side relative to the clutch center 3. The support plate 6 is attached to the tip of the column portion 35 (upper end in Figure 2). Specifically, a bolt 8 fastens the clutch center 3 and the support plate 6 together. As a result, the support plate 6 rotates integrally with the clutch center 3.

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

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

[0061] The contact portion 62 is the part that contacts the coil spring 9. The contact portion 62 contacts the axial first end of the coil spring 9 on the surface facing the axial second side. The contact portion 62 is spaced apart from the mounting portion 61 in the circumferential direction. In detail, the multiple mounting portions 61 and the multiple contact portions 62 are arranged alternately in the circumferential direction.

[0062] The protrusions 63 are positioned radially outward relative to the contact portion 62. Multiple protrusions 63 are spaced apart from each other in the circumferential direction. The protrusions 63 project outward in the second axial direction. These protrusions 63 can restrict the axial first end of the coil spring 9 from moving radially outward. The protrusions 63 are formed, for example, by press-forming the outer circumference of a disc toward the second axial direction.

[0063] The reinforcing portion 64 is positioned radially outward relative to the mounting portion 61. The reinforcing portion 64 is configured to improve the bending rigidity of the support plate 6. Specifically, the support plate 6 is fixed by the mounting portion 61 being attached to the column portion 35, while the contact portion 62 is pressed axially to the first side by the coil spring 9. As a result, bending deformation may occur mainly in the portion radially outward relative to the mounting portion 61. In contrast, by forming the reinforcing portion 64 radially outward of the mounting portion 61 to improve bending rigidity, the above bending deformation can be suppressed.

[0064] The support plate 6 has a plurality of outer peripheral portions 65 that are positioned radially outward from the mounting portion 61. The outer peripheral portions 65, like the protrusions 63, are positioned on a second axial side relative to the other parts of the support plate 6. For example, the outer peripheral portions 65 can be positioned on a second axial side relative to the other parts by press working. The outer peripheral portions 65 are spaced apart from the protrusions 63 in the circumferential direction.

[0065] As the outer periphery 65 is positioned on the second axial side compared to the other parts of the support plate 6, a step is formed between the outer periphery 65 and the mounting portion 61. The step extends in the circumferential direction. The reinforcing portion 64 is composed of this step. The multiple outer periphery 65s are arranged alternately with the multiple protrusions 63 in the circumferential direction. The outer periphery 65s are spaced apart from the protrusions 63 in the circumferential direction. That is, the step formed by the outer periphery 65s and the step formed by the protrusions 63s are spaced apart from each other in the circumferential direction.

[0066] [Coil spring] As shown in Figures 1 and 2, the coil springs 9 are arranged in the circumferential direction at a distance from the column portions 35. More specifically, multiple coil springs 9 and multiple column portions 35 are arranged alternately in the circumferential direction. The coil springs 9 are positioned in a compressed state between the pressure plate 4 and the support plate 6 in the axial direction. The axial second end of the coil spring 9 is positioned within the retaining recess 461 of the pressure plate 4. The movement of the coil springs 9 in the radial and circumferential directions is restricted by being held by the retaining recess 461.

[0067] The coil spring 9 biases the pressure plate 4 to the second axial direction. As a result, the pressing surface 48 is biased to move closer to the pressure receiving surface 34, the clutch unit 5 enters the clutch-on state, and power is transmitted. The release member moves the pressure plate 4 to the first axial direction against the biasing force of the coil spring 9, causing the pressing surface 48 to move away from the pressure receiving surface 34. As a result, the clutch unit 5 enters the clutch-off state, and the transmission of power between the clutch housing 2 and the clutch center 3 is interrupted.

[0068] [Operation of the cam mechanism] When the pressure plate 4 rotates relative to the clutch center 3 in the first rotational direction R1 during acceleration, the second cam surface 381 and the fourth cam surface 441 push against each other, causing the fourth cam portion 44 to move axially towards the second side. As a result, the pressing surface 48 moves closer to the pressure receiving surface 34, increasing the coupling force of the clutch portion 5.

[0069] On the other hand, when the clutch center 3 rotates relative to the pressure plate 4 in the first rotational direction R1, such as during deceleration, the first cam surface 371 and the third cam surface 431 push against each other, causing the third cam portion 43 to move axially towards the first side. As a result, the pressing surface 48 moves away from the pressure receiving surface 34, reducing the coupling force of the clutch portion 5.

[0070] [Differentiation] Although embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications are possible without departing from the spirit of the invention. Furthermore, the following modifications can basically be applied simultaneously.

[0071] (a) In the above embodiment, the column portion 35 has a column body portion 351 and an interference portion 352, but the configuration of the column portion 35 is not limited thereto. For example, the column portion 35 may not have an interference portion 352. In this case, the column portion 35 is cylindrical. Therefore, the maximum dimension of the column portion 35 in an axial view is the outer diameter of the column portion 35. This outer diameter of the column 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 axial side, that is, 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 thereto. Specifically, as shown in Figure 10, the pressure plate 4 may also have a column portion 35. That is, the clutch device 100 may be configured such 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 modified version, 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. In other words, the clutch center 3, which is the second rotating body, is axially relative to the pressure plate 4, which is the first rotating body.

[0074] (c) As shown in Figures 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 positioned radially outward from the column portion 35. In a radial view, the guide walls 401 overlap with the column portion 35. 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 to overlap with the outer guide surface 403 in a radial view.

[0075] The tip of the guide wall 401 is positioned on the first axial side relative to the tip of the column 35. That is, the axial dimension of the guide wall 401 is larger than the axial dimension of the column 35. The circumferential dimension of the guide wall 401 is larger than that of the column 35. Therefore, in a radial view, the column 35 is completely covered by the guide wall 401.

[0076] The inner guide surface 402 of the guide wall 401 is in contact with the support plate 6. In this way, the support plate 6 is positioned radially relative to the pressure plate 4 by the contact of the inner guide surface 402 with the support plate 6.

[0077] The outer guide surface 403 of the guide wall 401 is in contact with the clutch center 3. In this way, the pressure plate 4 is positioned radially relative to the clutch center 3 by the outer guide surface 403 in contact with the clutch center 3.

[0078] The interfering portion 352 extends axially between the column body 351 and the guide wall 401. The interfering portion 352 connects the column body 351 and the guide wall 401. The interfering portion 352 protrudes radially outward from the column body 351. [Explanation of Symbols]

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

Claims

1. A clutch device configured to be rotatable, A first rotating body having a column extending in the axial direction and arranged to be rotatable, A second rotating body is arranged to be rotatable and axially movable relative to the first rotating body, A clutch portion is disposed between the first rotating body and the second rotating body, The column portion and the coil springs arranged at a distance from each other in the circumferential direction, A support plate attached to the tip of the column portion of the first rotating body, A bolt fastens the support plate and the first rotating body, Equipped with, The column portion has a screw hole into which the bolt is screwed, The column portion has a maximum dimension in an axial view that is larger than the inner diameter of the coil spring. The column portion comprises a column body and an interference portion that protrudes from the outer circumferential surface of the column body. Clutch device.

2. The interfering portion protrudes circumferentially from the column body portion, The clutch device according to claim 1.

3. The first rotating body has a guide wall positioned radially outward from the column portion, The interference portion connects the column body and the guide wall. The clutch device according to claim 1.

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