WO2024058173A1

WO2024058173A1 - Clutch device, and motorcycle

Info

Publication number: WO2024058173A1
Application number: PCT/JP2023/033201
Authority: WO
Inventors: 潤小向; 泰則東; 真神原
Original assignee: 株式会社エフ・シー・シー
Priority date: 2022-09-13
Filing date: 2023-09-12
Publication date: 2024-03-21
Also published as: JP2024040957A

Abstract

A clutch device 10 is provided with pressure plate 70 which is provided in such a way as to be capable of moving toward and away from a clutch center 40 and capable of rotating relative thereto, and which is capable of pressing an input side rotating plate 20 and an output side rotating plate 22, wherein: the pressure plate 70 comprises a flange 98 that extends from an outer peripheral edge of a main body 72 toward a radially outer side, and a plurality of pressure side mating teeth 77 formed on the flange 98; the flange 98 comprises a pressing surface 98A for applying a pressing force to the input side rotating plate 20 and the output side rotating plate 22, and a mating teeth forming surface 98B which is located on a radially inner side of the pressing surface 98A and which is located between adjacent pressure side mating teeth 77; and the pressing surface 98A and the mating teeth forming surface 98B are formed to be substantially flush with one another.

Description

Clutch devices and motorcycles

The present invention relates to a clutch device and a motorcycle. More specifically, the present invention relates to a clutch device that arbitrarily transmits or interrupts rotational driving force of an input shaft rotationally driven by a prime mover such as an engine to an output shaft, and a motorcycle equipped with the clutch device.

Conventionally, vehicles such as motorcycles have been equipped with clutch devices. The clutch device is disposed between the engine and the driving wheels, and transmits or interrupts rotational driving force of the engine to the driving wheels. A clutch device typically includes a plurality of input-side rotary plates that are rotated by rotational driving force of an engine, and a plurality of output-side rotary plates that are connected to an output shaft that transmits the rotational driving force to drive wheels. The input-side rotary plates and the output-side rotary plates are arranged alternately in the stacking direction, and the rotational driving force is transmitted or cut off by press-contacting and separating the input-side rotary plates and the output-side rotary plates.

For example, Patent Document 1 describes a clutch center (clutch member) that holds an output side rotating plate (driven side clutch plate), a pressure plate (pressure member) that is provided so as to be able to approach and separate from the clutch center, A clutch device is disclosed. The pressure plate is configured to be able to press the input side rotary plate and the output side rotary plate. In this way, in the clutch device, the clutch center and the pressure plate are assembled and used.

In addition, in the clutch device of Patent Document 1, the clutch center has center side fitting teeth (outer circumferential wall on which a spline is formed) as a part that holds the output side rotary plate, and the pressure plate has pressure side fitting teeth. have. When the clutch center and pressure plate are assembled, the center side fitting teeth and the pressure side fitting teeth are configured to overlap in the radial direction.

Patent No. 6894792

By the way, clutch oil flowing out from the output shaft flows inside the clutch center. A portion of the clutch oil passes between the clutch center and the pressure plate and flows to the flange of the pressure plate. Here, the flange is formed with pressure side fitting teeth that hold the input side rotary plate and the output side rotary plate. Therefore, it is desired to efficiently flow the clutch oil through the flange and supply the clutch oil to the input rotary plate and the output rotary plate.

The present invention has been made in view of the above, and an object of the present invention is to provide a clutch that can efficiently flow clutch oil at the flange of the pressure plate and supply the clutch oil to the input side rotary plate and the output side rotary plate. An object of the present invention is to provide a device and a motorcycle equipped with the same.

A clutch device according to the present invention is a clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft, and includes a clutch housing that holds a plurality of input-side rotary plates that are rotationally driven by the rotational drive of the input shaft. a clutch center that is housed and holds a plurality of output-side rotary plates arranged alternately with the input-side rotary plates and rotationally driven together with the output shaft; and a clutch center that is capable of approaching or separating from the clutch center; A pressure plate is provided so as to be relatively rotatable and capable of pressing the input-side rotary plate and the output-side rotary plate. The pressure plate includes a main body, a flange extending radially outward from an outer peripheral edge of the main body, and is formed on the flange, holds the input rotary plate and the output rotary plate, and extends in the circumferential direction. It is equipped with a plurality of pressure side fitting teeth lined up. The flange is located between a pressing surface that applies a pressing force to the input rotary plate and the output rotary plate, and a radially inner side of the pressing surface and adjacent pressure side fitting teeth. A mating tooth formation surface is provided. The pressing surface and the fitting tooth forming surface are formed substantially flush with each other.

According to the clutch device according to the present invention, the pressing surface and the fitting tooth forming surface are formed substantially flush with each other. Therefore, the clutch oil that has passed between the clutch center and the pressure plate and flowed to the flange of the pressure plate reaches the fitting tooth forming surface and then smoothly flows to the pressing surface. That is, since the clutch oil flows efficiently in the flange, the clutch oil can be efficiently supplied to the input side rotary plate and the output side rotary plate held by the pressure side fitting teeth.

Another clutch device according to the present invention is a clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft, the clutch holding a plurality of input-side rotary plates rotationally driven by the rotational drive of the input shaft. a clutch center that is housed in a housing, holds a plurality of output-side rotary plates arranged alternately with the input-side rotary plates, and rotates together with the output shaft; and a clutch center that approaches or separates from the clutch center. and a pressure plate that is provided so as to be relatively rotatable and capable of pressing the input-side rotary plate and the output-side rotary plate. The pressure plate includes a main body, a flange extending radially outward from an outer peripheral edge of the main body, and is formed on the flange, holds the input rotary plate and the output rotary plate, and extends in the circumferential direction. It is equipped with a plurality of pressure side fitting teeth lined up. The flange includes a fitting tooth forming surface located between the adjacent pressure side fitting teeth, and a connecting surface located between the main body and the pressure side fitting teeth in the radial direction. . The fitting tooth forming surface and the connecting surface are formed substantially flush with each other.

According to the clutch device according to the present invention, the fitting tooth forming surface and the connecting surface are formed substantially flush with each other. Therefore, the clutch oil that has passed between the clutch center and the pressure plate and flowed to the flange of the pressure plate reaches the connection surface and then smoothly flows to the fitting tooth forming surface. That is, since the clutch oil flows efficiently in the flange, the clutch oil can be efficiently supplied to the input side rotary plate and the output side rotary plate held by the pressure side fitting teeth.

According to the present invention, it is possible to provide a clutch device that can efficiently flow clutch oil through the flange of the pressure plate and supply the clutch oil to the input-side rotary plate and the output-side rotary plate.

FIG. 1 is a sectional view of a clutch device according to one embodiment. FIG. 2 is a perspective view of a clutch center according to one embodiment. FIG. 3 is a plan view of a clutch center according to one embodiment. FIG. 4 is a perspective view of a pressure plate according to one embodiment. FIG. 5 is a plan view of a pressure plate according to one embodiment. FIG. 6 is a perspective view of a pressure plate according to one embodiment. FIG. 7 is a plan view of a pressure plate according to one embodiment. FIG. 8 is a plan view showing a state in which the clutch center and pressure plate according to one embodiment are combined. FIG. 9A is an enlarged cross-sectional view of a portion of the pressure plate. FIG. 9B is an enlarged cross-sectional view of a portion of the pressure plate before lathe processing. FIG. 10A is a schematic diagram illustrating the actions of the center-side assist cam surface and the pressure-side assist cam surface. FIG. 10B is a schematic diagram illustrating the actions of the center side slipper cam surface and the pressure side slipper cam surface.

Hereinafter, embodiments of a clutch device according to the present invention will be described with reference to the drawings. Note that the embodiments described here are, of course, not intended to particularly limit the present invention. In addition, the same reference numerals are given to members and parts that have the same function, and redundant explanations are omitted or simplified as appropriate.

FIG. 1 is a cross-sectional view of a clutch device 10 according to the present embodiment. The clutch device 10 is provided, for example, in a vehicle such as a motorcycle. The clutch device 10 is, for example, a device that transmits or interrupts rotational driving force of an input shaft (crankshaft) of an engine of a motorcycle to an output shaft 15. The clutch device 10 is a device for transmitting or interrupting the rotational driving force of the input shaft to the driving wheels (rear wheels) via the output shaft 15. Clutch device 10 is arranged between the engine and the transmission.

In the following description, the direction in which the pressure plate 70 of the clutch device 10 and the clutch center 40 are lined up is referred to as a direction D, the direction in which the pressure plate 70 approaches the clutch center 40 is referred to as a first direction D1, and the direction in which the pressure plate 70 approaches the clutch center 40 is referred to as a first direction D1. The direction away from the second direction is defined as a second direction D2. Further, the circumferential direction of the clutch center 40 and the pressure plate 70 is defined as a circumferential direction S, and the direction from one pressure side cam part 90 to the other pressure side cam part 90 with respect to the circumferential direction S is a first circumferential direction S1 (FIG. ), the direction from the other pressure side cam part 90 to one pressure side cam part 90 is defined as a second circumferential direction S2 (see FIG. 5). In this embodiment, the axial direction of the output shaft 15, the axial direction of the clutch housing 30, the axial direction of the clutch center 40, and the axial direction of the pressure plate 70 are the same direction as the direction D. Moreover, the pressure plate 70 and the clutch center 40 rotate in the first circumferential direction S1. However, the above-mentioned direction is merely a direction determined for convenience of explanation, and does not limit the installation mode of the clutch device 10 in any way, nor does it limit the present invention in any way.

As shown in FIG. 1, the output shaft 15 is a shaft body formed in a hollow shape. One end of the output shaft 15 rotatably supports an input gear 35 and a clutch housing 30, which will be described later, via a needle bearing 15A. Output shaft 15 fixedly supports clutch center 40 via nut 15B. That is, the output shaft 15 rotates integrally with the clutch center 40. The other end of the output shaft 15 is connected to, for example, a transmission (not shown) of a two-wheeled automobile.

As shown in FIG. 1, the output shaft 15 includes a push rod 16A in its hollow portion 15H and a push member 16B provided adjacent to the push rod 16A. The hollow portion 15H has a function as a clutch oil flow path. Clutch oil flows within the output shaft 15, that is, within the hollow portion 15H. The push rod 16A and the push member 16B are provided so as to be slidable within the hollow portion 15H of the output shaft 15. The push rod 16A has one end (the end on the left side in the figure) connected to a clutch operating lever (not shown) of the motorcycle, and is pushed by sliding in the hollow portion 15H by operating the clutch operating lever. The member 16B is pressed in the second direction D2. A portion of the push member 16B protrudes outward from the output shaft 15 (here, in the second direction D2), and is connected to the release bearing 18 provided on the pressure plate 70. The push rod 16A and the push member 16B are formed to be thinner than the inner diameter of the hollow portion 15H, and the circulation of clutch oil is ensured within the hollow portion 15H.

The clutch housing 30 is made of aluminum alloy. The clutch housing 30 is formed into a cylindrical shape with a bottom. As shown in FIG. 1, the clutch housing 30 includes a bottom wall 31 formed in a substantially circular shape and a side wall 33 extending from an edge of the bottom wall 31 in a second direction D2. The clutch housing 30 holds a plurality of input-side rotating plates 20.

As shown in FIG. 1, an input gear 35 is provided on the bottom wall 31 of the clutch housing 30. The input gear 35 is fixed to the bottom wall 31 by a rivet 35B via a torque damper 35A. The input gear 35 meshes with a drive gear (not shown) that is rotated by rotation of the input shaft of the engine. The input gear 35 is rotated independently from the output shaft 15 and integrally with the clutch housing 30.

The input side rotary plate 20 is rotationally driven by the rotational drive of the input shaft. As shown in FIG. 1, the input rotary plate 20 is held on the inner peripheral surface of the side wall 33 of the clutch housing 30. As shown in FIG. The input rotary plate 20 is held in the clutch housing 30 by spline fitting. The input side rotating plate 20 is provided so as to be displaceable along the axial direction of the clutch housing 30. The input side rotary plate 20 is provided so as to be rotatable integrally with the clutch housing 30.

The input side rotating plate 20 is a member that is pressed against the output side rotating plate 22. The input side rotary plate 20 is a flat plate formed in an annular shape. The input rotary plate 20 is formed by punching a thin plate made of SPCC (cold rolled steel plate) into an annular shape. Friction materials (not shown) made of a plurality of pieces of paper are attached to the front and back surfaces of the input-side rotary plate 20. Grooves with a depth of several μm to several tens of μm are formed between the friction materials to hold clutch oil.

As shown in FIG. 1, the clutch center 40 is housed in the clutch housing 30. The clutch center 40 is arranged concentrically with the clutch housing 30. The clutch center 40 has a cylindrical main body 42 and a flange 68 extending radially outward from the outer peripheral edge of the main body 42. The clutch center 40 holds an input side rotary plate 20 and a plurality of output side rotary plates 22 arranged alternately in the direction D. The clutch center 40 is rotationally driven together with the output shaft 15.

As shown in FIG. 2, the main body 42 includes an annular base wall 43, an outer peripheral wall 45 located on the radially outer side of the base wall 43 and extending in the second direction D2, and a peripheral wall 45 provided at the center of the base wall 43. The output shaft holder 50 has an output shaft holding portion 50 , a plurality of center side cam portions 60 connected to the base wall 43 and the outer peripheral wall 45 , and a center side fitting portion 58 .

The output shaft holding portion 50 is formed in a cylindrical shape. The output shaft holder 50 has an insertion hole 51 into which the output shaft 15 is inserted and spline-fitted. The insertion hole 51 is formed to penetrate the base wall 43. A plurality of spline grooves are formed along the axial direction in the inner circumferential surface 50A of the output shaft holding portion 50 that forms the insertion hole 51. The output shaft 15 is connected to the output shaft holder 50 .

As shown in FIG. 2, the outer peripheral wall 45 of the clutch center 40 is arranged radially outward from the output shaft holding part 50. A spline fitting portion 46 is provided on the outer circumferential surface 45A of the outer circumferential wall 45. The spline fitting portion 46 is formed between a plurality of center side fitting teeth 47 extending in the axial direction of the clutch center 40 along the outer circumferential surface 45A of the outer circumferential wall 45 and between adjacent center side fitting teeth 47, and It has a plurality of spline grooves 48 extending in the axial direction of the center 40 and an oil discharge hole 49. The center side fitting tooth 47 holds the output side rotating plate 22. The plurality of center-side fitting teeth 47 are arranged in the circumferential direction S. The plurality of center side fitting teeth 47 are formed at equal intervals in the circumferential direction S. The plurality of center side fitting teeth 47 are formed in the same shape. The center side fitting teeth 47 protrude radially outward from the outer circumferential surface 45A of the outer circumferential wall 45. The number of center-side fitting teeth 47 is preferably a multiple of the number of center-side cam portions 60. In this embodiment, the number of center side cam portions 60 is three, and the number of center side fitting teeth 47 is thirty, as will be described later. Note that the number of center-side fitting teeth 47 does not have to be a multiple of the number of center-side cam portions 60. The oil discharge hole 49 is formed to penetrate the outer peripheral wall 45 in the radial direction. The oil discharge hole 49 is formed between adjacent center side fitting teeth 47 . That is, the oil discharge hole 49 is formed in the spline groove 48. The oil discharge hole 49 is formed on the side of the center side cam portion 60. The oil discharge hole 49 is formed on the side of the center side slipper cam surface 60S of the center side cam portion 60. The oil discharge hole 49 is formed closer to the first circumferential direction S1 than the center side slipper cam surface 60S. The oil discharge hole 49 is formed closer to the second circumferential direction S2 than a boss portion 54, which will be described later. In this embodiment, three oil discharge holes 49 are formed at three locations in the circumferential direction S of the outer peripheral wall 45. The oil discharge holes 49 are arranged at equal intervals in the circumferential direction S. The oil discharge hole 49 communicates the inside and outside of the clutch center 40. The oil discharge hole 49 is a hole for discharging clutch oil that has flowed into the clutch center 40 from the output shaft 15 to the outside of the clutch center 40 . Here, the oil discharge hole 49 discharges clutch oil flowing on the inner peripheral surface 45B side of the outer peripheral wall 45 to the outside of the clutch center 40. At least a portion of the oil discharge hole 49 is provided at a position facing a pressure side fitting portion 88, which will be described later.

The output rotary plate 22 is held by the spline fitting portion 46 of the clutch center 40 and the pressure plate 70. A portion of the output rotary plate 22 is held in center-side fitting teeth 47 and a spline groove 48 of the clutch center 40 by spline fitting. The other part of the output side rotary plate 22 is held by pressure side fitting teeth 77 (see FIG. 4), which will be described later, of the pressure plate 70. The output side rotary plate 22 is provided so as to be displaceable along the axial direction of the clutch center 40 . The output side rotating plate 22 is provided to be rotatable integrally with the clutch center 40.

The output side rotating plate 22 is a member that is pressed against the input side rotating plate 20. The output side rotating plate 22 is a flat plate formed in an annular shape. The output side rotating plate 22 is formed by punching out a thin plate material made of SPCC material into an annular shape. Grooves with a depth of several μm to several tens of μm are formed on the front and back surfaces of the output rotary plate 22 to hold clutch oil. The front and back surfaces of the output rotary plate 22 are subjected to surface hardening treatment to improve wear resistance. Note that the friction material provided on the input side rotary plate 20 may be provided on the output side rotary plate 22 instead of the input side rotary plate 20, or on each of the input side rotary plate 20 and the output side rotary plate 22. may be provided.

The center side cam portion 60 is configured to quickly increase the assist torque, which is a force that increases the pressing force (pressing force) between the input side rotary plate 20 and the output side rotary plate 22, or the input side rotary plate 20 and the output side rotary plate 22. It is formed into a table-like shape with a cam surface consisting of an inclined surface forming an Assist & Slipper (registered trademark) mechanism that generates a slipper torque that is a force for separating the clutch and shifting the clutch to a half-clutch state. The center side cam portion 60 is formed to protrude from the base wall 43 in the second direction D2. As shown in FIG. 3, the center-side cam parts 60 are arranged at equal intervals in the circumferential direction S of the clutch center 40. In this embodiment, the clutch center 40 has three center-side cam parts 60, but the number of center-side cam parts 60 is not limited to three.

As shown in FIG. 3, the center side cam portion 60 is located on the radially outer side of the output shaft holding portion 50. The center side cam portion 60 has a center side assist cam surface 60A and a center side slipper cam surface 60S. The center-side assist cam surface 60A is configured to move from the pressure plate 70 to the clutch center in order to increase the pressing force (pressing force) between the input-side rotary plate 20 and the output-side rotary plate 22 when the center side assist cam surface 60A rotates relative to the pressure plate 70. 40 (the direction in which the pressure plate 70 approaches the clutch center 40). In this embodiment, when the above-described force is generated, the position of the pressure plate 70 relative to the clutch center 40 does not change, and there is no need for the pressure plate 70 to physically approach the clutch center 40. Note that the pressure plate 70 may be physically displaced with respect to the clutch center 40. The center side slipper cam surface 60S moves the pressure plate 70 toward the clutch center 40 in order to reduce the pressing force (pressing force) between the input side rotary plate 20 and the output side rotary plate 22 when the center side slipper cam surface 60S rotates relative to the pressure plate 70. It is configured to be separated from the In the center side cam parts 60 that are adjacent to each other in the circumferential direction S, the center side assist cam surface 60A of one center side cam part 60L and the center side slipper cam surface 60S of the other center side cam part 60M are opposed to each other in the circumferential direction S. It is located.

As shown in FIG. 2, the clutch center 40 includes a plurality (three in this embodiment) of boss portions 54. The boss portion 54 is a member that supports the pressure plate 70. The plurality of boss portions 54 are arranged at equal intervals in the circumferential direction S. The boss portion 54 is formed in a cylindrical shape. The boss portion 54 is located radially outward from the output shaft holding portion 50. The boss portion 54 extends toward the pressure plate 70 (that is, toward the second direction D2). The boss portion 54 is provided on the base wall 43. The boss portion 54 is formed with a screw hole 54H into which the bolt 28 (see FIG. 1) is inserted. The screw hole 54H extends in the axial direction of the clutch center 40.

As shown in FIGS. 2 and 3, the clutch center 40 has a center-side cam hole 43H that passes through a portion of the base wall 43. The center side cam hole 43H penetrates the base wall 43 in the direction D. The center side cam hole 43H extends from the side of the output shaft holding portion 50 to the outer peripheral wall 45. The center side cam hole 43H is formed between the center side assist cam surface 60A of the center side cam portion 60 and the boss portion 54. When viewed from the axial direction of the clutch center 40, the center-side assist cam surface 60A and a portion of the center-side cam hole 43H overlap.

As shown in FIG. 2, the center side fitting part 58 is located radially outward from the output shaft holding part 50. The center side fitting portion 58 is located radially outward from the center side cam portion 60. The center-side fitting portion 58 is located closer to the second direction D2 than the center-side cam portion 60. The center side fitting portion 58 is formed on the inner circumferential surface 45B of the outer circumferential wall 45. The center side fitting part 58 is configured to be slidably fitted onto a pressure side fitting part 88 (see FIG. 4), which will be described later. The inner diameter of the center side fitting part 58 is formed to have a fitting tolerance that allows the flow of clutch oil flowing out from the tip end 15T of the output shaft 15 (see FIG. 1) to the pressure side fitting part 88. ing. That is, a gap is formed between the center side fitting part 58 and the pressure side fitting part 88, which will be described later. In this embodiment, for example, the center side fitting part 58 is formed to have an inner diameter larger than the outer diameter of the pressure side fitting part 88 by 0.1 mm. The dimensional tolerance between the inner diameter of the center side fitting part 58 and the outer diameter of the pressure side fitting part 88 is set appropriately depending on the amount of clutch oil to be circulated, and is, for example, 0.1 mm or more and 0.5 mm. It is as follows.

As shown in FIG. 1, the pressure plate 70 is provided so that it can approach or move away from the clutch center 40 and can rotate relative to it. The pressure plate 70 is configured to be able to press the input side rotary plate 20 and the output side rotary plate 22. Pressure plate 70 is arranged concentrically with clutch center 40 and clutch housing 30. The pressure plate 70 includes a main body 72 and a flange 98 connected to the outer peripheral edge of the main body 72 on the second direction D2 side and extending radially outward. The main body 72 protrudes beyond the flange 98 in the first direction D1. The pressure plate 70 holds the input side rotary plates 20 and a plurality of output side rotary plates 22 arranged alternately. The output side rotating plate 22 is provided so as to be displaceable along the axial direction of the pressure plate 70. The output side rotary plate 22 is provided so as to be rotatable integrally with the pressure plate 70.

As shown in FIG. 4, the main body 72 includes a cylindrical portion 80, a plurality of pressure side cam portions 90, a pressure side fitting portion 88, and a spring housing portion 84 (see also FIG. 6).

As shown in FIG. 4, the flange 98 extends radially outward from the outer peripheral edge 72 of the main body. Here, the flange 98 extends radially outward from the outer peripheral edge of the pressure side fitting portion 88. The flange 98 has a pressing surface 98A that applies a pressing force to the input side rotating plate 20 and the output side rotating plate 22, a fitting tooth forming surface 98B located radially inward from the pressing surface 98A, and a fitting tooth forming surface 98B. The connecting surface 98C is located radially inward than the connecting surface 98C. The pressing surface 98A is a surface that directly or indirectly contacts the input side rotary plate 20 and the output side rotary plate 22. The input rotary plate 20 and the output rotary plate 22 are sandwiched between the pressing surface 98A and the flange 68 of the clutch center 40. Pressure side fitting teeth 77, which will be described later, are formed on the fitting tooth forming surface 98B. The fitting tooth forming surface 98B is located between adjacent pressure side fitting teeth 77. The connection surface 98C is connected to the main body 72. Here, the connection surface 98C is connected to the pressure side fitting portion 88. As shown in FIG. 5, the connecting surface 98C is located between the main body 72 and the pressure side fitting tooth 77 in the radial direction. The connection surface 98C is formed continuously over the entire circumferential direction S of the pressure plate 70.

As shown in FIG. 4, the pressing surface 98A and the fitting tooth forming surface 98B are formed substantially flush with each other. The fitting tooth forming surface 98B and the connecting surface 98C are formed substantially flush with each other. The pressing surface 98A, the fitting tooth forming surface 98B, and the connecting surface 98C are formed substantially flush with each other. Here, "approximately flush" includes a state where the surfaces are completely flush with each other and there is no difference in level, and a state where the surfaces are substantially flush with each other although there is a difference in level of about 0 mm to 0.3 mm. In this embodiment, as shown in FIG. 9A, the fitting tooth forming surface 98B and the connecting surface 98C are completely flush, and the pressing surface 98A and the fitting tooth forming surface 98B have a slight step and are almost flush. It is one. Here, the reason why there is a slight step difference between the pressing surface 98A and the fitting tooth forming surface 98B is because the surface of the pressing surface 98A is subjected to lathe processing. In the state before lathe processing, as shown in FIG. 9B, the pressing surface 98A, the fitting tooth forming surface 98B, and the connecting surface 98C are completely flush with each other. In this way, if the pressing surface 98A, the fitting tooth forming surface 98B, and the connecting surface 98C are completely flush with each other before lathe processing, normally, the pressing surface 98A and the fitting tooth forming surface 98A are completely flush with each other after lathe processing. The forming surface 98B and the connecting surface 98C are substantially flush with each other.

As shown in FIGS. 4 and 5, the flange 98 has a through hole 99. The through hole 99 passes through the flange 98 in the direction D. In this embodiment, the through holes 99 are formed through the flange 98 at three locations in the circumferential direction S. The three through holes 99 are arranged at equal intervals in the circumferential direction S. Note that the number of through holes 99 is not limited to three. Further, the plurality of through holes 99 may not be arranged at equal intervals. The through hole 99 is formed radially inside the pressing surface 98A. The through hole 99 is formed in the fitting tooth forming surface 98B. In this embodiment, the through hole 99 is formed from the fitting tooth forming surface 98B to the connecting surface 98C. The through hole 99 is located between adjacent pressure side fitting teeth 77 in the circumferential direction S. As shown in FIG. 1, the through hole 99 is formed so that the opening area becomes larger from the front surface 98F of the flange 98 toward the back surface 98R. The through hole 99 is formed so that the inner diameter becomes larger from the front surface 98F of the flange 98 toward the back surface 98R. The through hole 99 is formed so that its cross-sectional area increases from the front surface 98F of the flange 98 toward the back surface 98R. A dedicated jig is inserted into the through hole 99 when assembling the clutch device 10. This jig is inserted from the outside of the pressure plate 70 in the first direction D1. By using a jig, the positions of the input-side rotary plate 20 and the output-side rotary plate 22 are adjusted. When the assembly of the clutch device 10 is completed, the jig is removed and the through hole 99 is opened. Therefore, when the clutch device 10 is used, that is, when the pressure plate 70 is rotated, the clutch oil that flows along the outer surface of the pressure plate 70 toward the edge due to centrifugal force easily flows into the through hole 99. Thereby, clutch oil can be efficiently supplied to the output side rotary plate 22 held by the pressure side fitting teeth 77 and the input side rotary plate 20 located between the output side rotary plate 22.

The cylindrical portion 80 is formed in a cylindrical shape. The cylindrical portion 80 is integrally formed with the pressure side cam portion 90. The cylindrical portion 80 accommodates the tip portion 15T (see FIG. 1) of the output shaft 15. The release bearing 18 (see FIG. 1) is accommodated in the cylindrical portion 80. The cylindrical portion 80 is a portion that receives the pressing force from the push member 16B. The cylindrical portion 80 is a portion that receives clutch oil flowing out from the tip portion 15T of the output shaft 15.

The pressure side cam portion 90 is formed into a table-like shape having a cam surface consisting of an inclined surface that constitutes an assist & slipper (registered trademark) mechanism that slides on the center side cam portion 60 to generate assist torque or slipper torque. has been done. The pressure side cam portion 90 is formed to protrude further than the flange 98 in the first direction D1. As shown in FIG. 5, the pressure side cam parts 90 are arranged at equal intervals in the circumferential direction S of the pressure plate 70. In this embodiment, the pressure plate 70 has three pressure side cam parts 90, but the number of pressure side cam parts 90 is not limited to three.

As shown in FIG. 5, the pressure side cam portion 90 is located on the radially outer side of the cylindrical portion 80. The pressure side cam portion 90 has a pressure side assist cam surface 90A (see also FIG. 7) and a pressure side slipper cam surface 90S. The pressure side assist cam surface 90A is configured to be able to come into contact with the center side assist cam surface 60A. The pressure side assist cam surface 90A is configured to move from the pressure plate 70 to the clutch center in order to increase the pressing force (pressing force) between the input side rotary plate 20 and the output side rotary plate 22 when the pressure side assist cam surface 90A rotates relative to the clutch center 40. 40 (the direction in which the pressure plate 70 approaches the clutch center 40). The pressure side slipper cam surface 90S is configured to be able to come into contact with the center side slipper cam surface 60S. The pressure side slipper cam surface 90S moves the pressure plate 70 toward the clutch center 40 in order to reduce the pressing force (pressing force) between the input side rotary plate 20 and the output side rotary plate 22 when the pressure side slipper cam surface 90S rotates relative to the clutch center 40. It is configured to be separated from the In the pressure side cam parts 90 that are adjacent in the circumferential direction S, the pressure side assist cam surface 90A of one pressure side cam part 90L and the pressure side slipper cam surface 90S of the other pressure side cam part 90M are opposed in the circumferential direction S. It is located.

Here, the functions of the center side cam section 60 and the pressure side cam section 90 will be explained. When the engine speed increases and the rotational driving force input to the input gear 35 and the clutch housing 30 can be transmitted to the output shaft 15 via the clutch center 40, as shown in FIG. 10A, the pressure plate 70 A rotational force in the first circumferential direction S1 is applied to. Therefore, a force is generated in the pressure plate 70 in the first direction D1 by the action of the center side assist cam surface 60A and the pressure side assist cam surface 90A. This increases the pressure force between the input rotary plate 20 and the output rotary plate 22.

On the other hand, when the rotational speed of the output shaft 15 exceeds the rotational speed of the input gear 35 and the clutch housing 30 and back torque is generated, the clutch center 40 is rotated in the first circumferential direction S1, as shown in FIG. 10B. Rotational force is applied. Therefore, by the action of the center side slipper cam surface 60S and the pressure side slipper cam surface 90S, the pressure plate 70 is moved in the second direction D2, and the pressure contact force between the input side rotary plate 20 and the output side rotary plate 22 is released. It has become. This makes it possible to avoid problems with the engine and transmission caused by back torque.

As shown in FIGS. 4 and 5, the pressure plate 70 has a pressure side cam hole 73H that passes through the main body 72 and a part of the flange 98. The pressure side cam hole 73H is located radially outward from the cylindrical portion 80. The pressure side cam hole 73H extends from the side of the cylindrical portion 80 to the radially outer side of the pressure side fitting portion 88. The pressure side cam hole 73H is formed to penetrate between the adjacent pressure side cam parts 90. The pressure side cam hole 73H is formed to penetrate between the pressure side assist cam surface 90A and the pressure side slipper cam surface 90S of the adjacent pressure side cam portions 90. As shown in FIGS. 5 and 7, when viewed from the axial direction of the pressure plate 70, the pressure side assist cam surface 90A and a portion of the pressure side cam hole 73H overlap.

As shown in FIGS. 6 and 7, the spring housing portion 84 is formed in the pressure side cam portion 90. The spring housing portion 84 is formed to be recessed from the second direction D2 to the first direction D1. The spring housing portion 84 is formed in an elliptical shape. The spring accommodating portion 84 accommodates the pressure spring 25 (see FIG. 1). An insertion hole 84H into which the boss portion 54 (see FIG. 2) is inserted is formed through the spring housing portion 84. That is, the insertion hole 84H is formed through the pressure side cam portion 90. The insertion hole 84H is formed in an elliptical shape.

As shown in FIG. 1, the pressure spring 25 is housed in the spring housing portion 84. The pressure spring 25 is held by the boss portion 54 inserted into the insertion hole 84H of the spring housing portion 84. The pressure spring 25 urges the pressure plate 70 toward the clutch center 40 (that is, toward the first direction D1). The pressure spring 25 is, for example, a coil spring made of spirally wound spring steel.

As shown in FIG. 4, the pressure side fitting portion 88 is provided on the main body 72. The pressure side fitting portion 88 is located radially outward from the pressure side cam portion 90. The pressure side fitting portion 88 is located closer to the second direction D2 than the pressure side cam portion 90. The pressure side fitting part 88 is configured to be slidably fitted into the center side fitting part 58 (see FIG. 2).

As shown in FIG. 4, the pressure plate 70 includes a plurality of pressure side fitting teeth 77 formed on the flange 98. The pressure side fitting teeth 77 hold the output side rotating plate 22. The pressure side fitting teeth 77 are located radially outward from the cylindrical portion 80. The pressure side fitting teeth 77 are located radially outward from the pressure side cam portion 90. The pressure side fitting teeth 77 are located radially outward from the pressure side fitting portion 88. The pressure side fitting teeth 77 are formed on the fitting tooth forming surface 98B of the flange 98. The pressure side fitting teeth 77 protrude from the fitting tooth forming surface 98B in the first direction D1. The plurality of pressure side fitting teeth 77 are arranged in the circumferential direction S. The plurality of pressure side fitting teeth 77 are arranged at equal intervals in the circumferential direction S. Note that in this embodiment, some of the pressure-side fitting teeth 77 are removed, so the interval between these parts is widened, but other adjacent pressure-side fitting teeth 77 are arranged at equal intervals. There is.

FIG. 9 is a plan view showing a state in which the clutch center 40 and the pressure plate 70 are combined. In the state shown in FIG. 9, the pressure side assist cam surface 90A and the center side assist cam surface 60A are not in contact with each other, and the pressure side slipper cam surface 90S and the center side slipper cam surface 60S are not in contact with each other. At this time, the pressure plate 70 is closest to the clutch center 40. In the state shown in FIG. 9 (assembled state), the distance L1 in the circumferential direction S between the boss portion 54 and the end portion 84HA of the insertion hole 84H on the pressure side assist cam surface 90A side (i.e., the first circumferential direction S1 side) is shorter than the distance L2 in the circumferential direction S between the boss portion 54 and the end portion 84HB of the insertion hole 84H on the pressure side slipper cam surface 90S side (that is, on the second circumferential direction S2 side) in normal times.

As shown in FIG. 1, the stopper plate 100 is provided so as to be able to come into contact with the pressure plate 70. The stopper plate 100 is a member that prevents the pressure plate 70 from being separated from the clutch center 40 by a predetermined distance or more in the second direction D2. The stopper plate 100 is fixed to the boss portion 54 of the clutch center 40 with bolts 28. The pressure plate 70 is fixed by tightening bolts 28 to the boss portion 54 via the stopper plate 100 with the boss portion 54 of the clutch center 40 and the pressure spring 25 disposed in the spring housing portion 84 . The stopper plate 100 is formed into a substantially triangular shape when viewed from above.

Here, when the pressure plate 70 contacts the stopper plate 100, the pressure side slipper cam surface 90S and the center side slipper cam surface 60S are respectively 50% or more and 90% or less of the area of the pressure side slipper cam surface 90S, and the center side More than 50% and less than 90% of the area of the slipper cam surface 60S is in contact with each other. Further, when the pressure plate 70 contacts the stopper plate 100, the pressure spring 25 is separated from the side wall of the spring housing portion 84. That is, the pressure spring 25 is not sandwiched between the boss portion 54 and the spring housing portion 84, and application of excessive stress to the boss portion 54 is suppressed.

A predetermined amount of clutch oil is filled in the clutch device 10. The clutch oil flows into the clutch center 40 and pressure plate 70 through the hollow part 15H of the output shaft 15, and then flows through the gap between the center side fitting part 58 and the pressure side fitting part 88 and the oil discharge hole 49. and is supplied to the input side rotary plate 20 and the output side rotary plate 22. Further, the clutch oil flows from the outside of the clutch center 40 through the hollow portion 15H of the output shaft 15 into the inside of the clutch center 40 through the pressure side cam hole 73H. Clutch oil absorbs heat and prevents friction material from wearing out. The clutch device 10 of this embodiment is a so-called wet multi-disc friction clutch device.

Next, the operation of the clutch device 10 of this embodiment will be explained. As mentioned above, the clutch device 10 is arranged between the engine and the transmission of the motorcycle, and transmits the rotational driving force of the engine to the transmission when the driver operates the clutch operation lever. and cut off.

In the clutch device 10, when the driver of the motorcycle does not operate the clutch operation lever, the clutch release mechanism (not shown) does not press the push rod 16A. force) to press the input side rotary plate 20. As a result, the clutch center 40 is rotated in a clutch ON state in which the input side rotary plate 20 and the output side rotary plate 22 are pressed against each other and frictionally connected. That is, the rotational driving force of the engine is transmitted to the clutch center 40, and the output shaft 15 is rotationally driven.

When the clutch is in the ON state, the clutch oil flowing in the hollow part 15H of the output shaft 15 and flowing out from the tip part 15T of the output shaft 15 falls or flies into the cylindrical part 80 and adheres thereto (as indicated by the arrow F in FIG. 1). reference). Clutch oil adhering to the inside of the cylindrical portion 80 is guided into the clutch center 40. Thereby, the clutch oil flows out of the clutch center 40 via the oil discharge hole 49. Further, the clutch oil flows out of the clutch center 40 through the gap between the center side fitting part 58 and the pressure side fitting part 88. The clutch oil flowing out of the clutch center 40 is then supplied to the input rotary plate 20 and the output rotary plate 22.

On the other hand, in the clutch device 10, when the driver of the motorcycle operates the clutch operation lever while the clutch is in the ON state, the clutch release mechanism (not shown) presses the push rod 16A, so that the pressure plate 70 acts as a pressure spring. 25 and is displaced in the direction away from the clutch center 40 (second direction D2). As a result, the clutch center 40 enters a clutch OFF state in which the frictional connection between the input-side rotary plate 20 and the output-side rotary plate 22 is eliminated, so that the rotational drive is attenuated or the rotational drive is stopped. That is, the rotational driving force of the engine is cut off to the clutch center 40.

In the clutch OFF state, the clutch oil flowing in the hollow portion 15H of the output shaft 15 and flowing out from the tip 15T of the output shaft 15 is guided into the clutch center 40 as in the clutch ON state. At this time, since the pressure plate 70 is separated from the clutch center 40, the amount of engagement with the center side fitting portion 58 and the pressure side fitting portion 88 decreases. As a result, the clutch oil in the cylindrical portion 80 more actively flows out of the clutch center 40 and flows to various locations inside the clutch device 10. In particular, the clutch oil can be actively guided between the input side rotary plate 20 and the output side rotary plate 22 which are separated from each other.

When the driver releases the clutch operating lever in the clutch OFF state, the pressure on the pressure plate 70 via the push member 16B by the clutch release mechanism (not shown) is released, so the pressure plate 70 is released under pressure. Due to the biasing force of the spring 25, it is displaced in a direction approaching the clutch center 40 (first direction D1).

As described above, according to the clutch device 10 of this embodiment, the pressing surface 98A and the fitting tooth forming surface 98B are formed substantially flush with each other. Therefore, the clutch oil that has passed between the clutch center 40 and the pressure plate 70 and flowed to the flange 98 of the pressure plate 70 smoothly flows to the pressing surface 98A after reaching the fitting tooth forming surface 98B. That is, since the clutch oil flows efficiently in the flange 98, the clutch oil can be efficiently supplied to the output side rotary plate 22 held by the pressure side fitting teeth 77 and the input side rotary plate 20 located between the output side rotary plate 22. can be supplied.

According to the clutch device 10 of this embodiment, the fitting tooth forming surface 98B and the connecting surface 98C are formed substantially flush with each other. Therefore, the clutch oil that has passed between the clutch center 40 and the pressure plate 70 and flowed to the flange 98 of the pressure plate 70 smoothly flows to the fitting tooth forming surface 98B after reaching the connection surface 98C. That is, since the clutch oil flows efficiently in the flange 98, the clutch oil can be efficiently supplied to the output side rotary plate 22 held by the pressure side fitting teeth 77 and the input side rotary plate 20 located between the output side rotary plate 22. can be supplied.

In the clutch device 10 of this embodiment, the flange 98 includes a connecting surface 98C located between the main body 72 and the pressure side fitting tooth 77 in the radial direction, and the pressing surface 98A, the fitting tooth forming surface 98B, and the connecting surface. It is formed substantially flush with 98C. According to the above aspect, the pressing surface 98A, the fitting tooth forming surface 98B, and the connecting surface 98C are formed substantially flush with each other. Therefore, after the clutch oil that has passed between the clutch center 40 and the pressure plate 70 and flowed to the flange 98 of the pressure plate 70 reaches the connecting surface 98C, it smoothly flows to the pressing surface 98A via the fitting tooth forming surface 98B. flows. That is, since the clutch oil flows efficiently in the flange 98, the clutch oil can be efficiently supplied to the output side rotary plate 22 held by the pressure side fitting teeth 77 and the input side rotary plate 20 located between the output side rotary plate 22. can be supplied.

In the clutch device 10 of the present embodiment, the clutch center 40 includes an output shaft holder 50 to which the output shaft 15 is connected, an outer circumferential wall 45 located radially outward than the output shaft holder 50, and an output side rotating plate. 22 and between a plurality of center side fitting teeth 47 arranged in the circumferential direction formed to protrude radially outward from the outer peripheral surface 45A of the outer peripheral wall 45 and adjacent center side fitting teeth 47. a plurality of spline grooves 48 formed in the outer circumferential wall 45 and an oil drain formed in the spline groove 48 so as to penetrate the outer circumferential wall 45 to discharge clutch oil flowing on the inner circumferential surface 45B side of the outer circumferential wall 45 to the outside of the clutch center 40. It includes a hole 49 and a center side fitting portion 58 formed on the inner circumferential surface 45B of the outer circumferential wall 45. The pressure plate 70 is provided in the main body 72 and includes a pressure side fitting part 88 that is slidably fitted into the center side fitting part 58, and the oil discharge hole 49 is located at a position opposite to the pressure side fitting part 88. It is set in. According to the above aspect, since the oil discharge hole 49 is provided at a position facing the pressure side fitting part 88, part of the clutch oil flowing between the pressure side fitting part 88 and the center side fitting part 58 is removed. The oil is discharged to the outside of the clutch center 40 from the oil discharge hole 49. Since the center side fitting tooth 47 that holds the output side rotary plate 22 is located on the radially outer side of the oil discharge hole 49, clutch oil is effectively supplied to the input side rotary plate 20 and the output side rotary plate 22. .

The preferred embodiments of the present invention have been described above. However, the above-described embodiments are merely illustrative, and the present invention can be implemented in various other forms.

In the embodiment described above, the center side cam portion 60 had the center side assist cam surface 60A and the center side slipper cam surface 60S, but it is sufficient to have at least one of them.

In the embodiment described above, the pressure side cam portion 90 had the pressure side assist cam surface 90A and the pressure side slipper cam surface 90S, but it is sufficient to have at least one of them.

10 Clutch device 15 Output shaft 20 Input side rotating plate 22 Output side rotating plate 30 Clutch housing 40 Clutch center 42 Main body 45 Outer peripheral wall 45A Outer peripheral surface 45B Inner peripheral surface 47 Center side fitting tooth 48 Spline groove 49 Oil discharge hole 50 Output shaft Holding part 58 Center side fitting part 60 Center side cam part 60A Center side assist cam surface 60S Center side slipper cam surface 68 Flange 70 Pressure plate 72 Main body 77 Pressure side fitting tooth 80 Cylindrical part 88 Pressure side fitting part 90 Pressure side Cam portion 90A Pressure side assist cam surface 90S Pressure side slipper cam surface 98 Flange 98A Pressing surface 98B Fitting tooth forming surface 98C Connection surface

Claims

A clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft,
housed in a clutch housing that holds a plurality of input-side rotary plates rotationally driven by the rotational drive of the input shaft, and holding a plurality of output-side rotary plates alternately arranged with the input-side rotary plates; a clutch center rotatably driven together with the output shaft;
a pressure plate that is provided so as to be movable toward or away from the clutch center and relatively rotatable, and capable of pressing the input-side rotary plate and the output-side rotary plate;
The pressure plate is
The main body and
a flange extending radially outward from the outer peripheral edge of the main body;
a plurality of pressure side fitting teeth formed on the flange, holding the output side rotary plate, and arranged in a circumferential direction;
The flange is
a pressing surface that applies a pressing force to the input rotary plate and the output rotary plate;
a mating tooth forming surface located radially inward from the pressing surface and located between the adjacent pressure side mating teeth;
a connecting surface located between the main body and the pressure side fitting tooth in the radial direction and continuously formed over the entire circumferential direction of the pressure plate;
The pressing surface and the fitting tooth forming surface are continuous, and the fitting tooth forming surface and the connecting surface are continuous, and the pressing surface, the fitting tooth forming surface, and the connecting surface are continuous. A clutch device that is formed substantially flush.
A clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft,
housed in a clutch housing that holds a plurality of input-side rotary plates rotationally driven by the rotational drive of the input shaft, and holding a plurality of output-side rotary plates alternately arranged with the input-side rotary plates; a clutch center rotatably driven together with the output shaft;
a pressure plate that is provided so as to be movable toward or away from the clutch center and relatively rotatable, and capable of pressing the input-side rotary plate and the output-side rotary plate;
The clutch center is
an output shaft holder to which the output shaft is connected;
an outer peripheral wall located radially outward than the output shaft holding portion;
a plurality of center-side fitting teeth aligned in the circumferential direction, which hold the output-side rotating plate and are formed to protrude radially outward from the outer peripheral surface of the outer peripheral wall;
a plurality of spline grooves formed between adjacent center side fitting teeth;
an oil discharge hole formed in the spline groove so as to penetrate the outer circumferential wall, and for discharging clutch oil flowing on the inner circumferential surface side of the outer circumferential wall to the outside of the clutch center;
a center side fitting portion formed on the inner circumferential surface of the outer circumferential wall;
The pressure plate is
The main body and
a flange extending radially outward from the outer peripheral edge of the main body;
a plurality of pressure side fitting teeth formed on the flange, holding the output side rotary plate, and arranged in a circumferential direction;
a pressure side fitting part provided on the main body and slidably fitting into the center side fitting part;
a pressure side assist that generates a force from the pressure plate toward the clutch center in order to increase the pressing force between the input side rotary plate and the output side rotary plate when the clutch rotates relative to the clutch center; comprising a cam surface;
The flange is
a pressing surface that applies a pressing force to the input rotary plate and the output rotary plate;
a fitting tooth forming surface located radially inward from the pressing surface and located between the adjacent pressure side fitting teeth,
The pressing surface and the fitting tooth forming surface are formed substantially flush with each other,
When the direction in which the pressure plate approaches the clutch center is defined as a first direction, and the direction in which the pressure plate moves away from the clutch center is defined as a second direction, the pressure side fitting portion is connected to the pressure side assist cam. located on the second direction side with respect to the surface,
In the clutch device, the oil discharge hole is provided at a position facing the pressure side fitting portion.
A clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft,
housed in a clutch housing that holds a plurality of input-side rotary plates rotationally driven by the rotational drive of the input shaft, and holding a plurality of output-side rotary plates alternately arranged with the input-side rotary plates; a clutch center rotatably driven together with the output shaft;
a pressure plate that is provided so as to be movable toward or away from the clutch center and relatively rotatable, and capable of pressing the input-side rotary plate and the output-side rotary plate;
The pressure plate is
The main body and
a flange extending radially outward from the outer peripheral edge of the main body;
a plurality of pressure side fitting teeth formed on the flange, holding the output side rotary plate, and arranged in a circumferential direction;
The flange is
a mating tooth forming surface located between the adjacent pressure side mating teeth;
a connecting surface located between the main body and the pressure side fitting tooth in the radial direction and continuously formed over the entire circumferential direction of the pressure plate;
In the clutch device, the fitting tooth forming surface and the connecting surface are continuous, and the fitting tooth forming surface and the connecting surface are formed substantially flush with each other.
A clutch device that transmits or interrupts rotational driving force of an input shaft to an output shaft,
housed in a clutch housing that holds a plurality of input-side rotary plates rotationally driven by the rotational drive of the input shaft, and holding a plurality of output-side rotary plates alternately arranged with the input-side rotary plates; a clutch center rotatably driven together with the output shaft;
a pressure plate that is provided so as to be movable toward or away from the clutch center and relatively rotatable, and capable of pressing the input-side rotary plate and the output-side rotary plate;
The clutch center is
an output shaft holder to which the output shaft is connected;
an outer peripheral wall located radially outward than the output shaft holding portion;
a plurality of center-side fitting teeth aligned in the circumferential direction, which hold the output-side rotating plate and are formed to protrude radially outward from the outer peripheral surface of the outer peripheral wall;
a plurality of spline grooves formed between adjacent center side fitting teeth;
an oil discharge hole formed in the spline groove so as to penetrate the outer circumferential wall, and for discharging clutch oil flowing on the inner circumferential surface side of the outer circumferential wall to the outside of the clutch center;
a center side fitting portion formed on the inner circumferential surface of the outer circumferential wall;
The pressure plate is
The main body and
a flange extending radially outward from the outer peripheral edge of the main body;
a plurality of pressure side fitting teeth formed on the flange, holding the output side rotary plate, and arranged in a circumferential direction;
a pressure side fitting part provided on the main body and slidably fitting into the center side fitting part;
a pressure side assist that generates a force from the pressure plate toward the clutch center in order to increase the pressing force between the input side rotary plate and the output side rotary plate when the clutch rotates relative to the clutch center; comprising a cam surface;
The flange is
a mating tooth forming surface located between the adjacent pressure side mating teeth;
a connecting surface located between the main body and the pressure side fitting tooth in the radial direction and continuously formed over the entire circumferential direction of the pressure plate;
The fitting tooth forming surface and the connecting surface are formed substantially flush with each other,
When the direction in which the pressure plate approaches the clutch center is defined as a first direction, and the direction in which the pressure plate moves away from the clutch center is defined as a second direction, the pressure side fitting portion is connected to the pressure side assist cam. located on the second direction side with respect to the surface,
In the clutch device, the oil discharge hole is provided at a position facing the pressure side fitting portion.
A motorcycle comprising the clutch device according to claim 1 or 3.