WO2006067980A1

WO2006067980A1 - Clutch device for motorcycle

Info

Publication number: WO2006067980A1
Application number: PCT/JP2005/022673
Authority: WO
Inventors: Yoshio Imanishi
Original assignee: Exedy Corporation
Priority date: 2004-12-20
Filing date: 2005-12-09
Publication date: 2006-06-29
Also published as: JP2006170400A; JP3841357B2

Abstract

A clutch device for a motorcycle, comprising a clutch housing (1), an output side rotating body (2), a clutch part (3), a pressure plate (4), and a diaphragm spring (5). The clutch housing (1) is connected to a crankshaft, and the output side rotating body (2) is connected to the shaft (17) of a transmission. The clutch part (3) is disposed in the clutch housing, and comprises a plurality of clutch plates (20) and (21). The pressure plate (4) is a member for pressing the clutch plates of the clutch part (3) against each other. The diaphragm spring (5) comprises a pressing part (5a) for pressing the pressure plate (4) and a lever part (5b) for releasing a pressing force by the pressing part (5a) by amplifying the operating force of a release mechanism with a prescribed lever ratio.

Description

Specification

Clutch device for motorcycle

Technical field

The present invention relates to a clutch device, and more particularly, to a clutch device for a motorcycle that transmits power of an input side member to an output side member and interrupts power transmission by operation of a release mechanism.

Background art

Generally, in motorcycles such as motorcycles and buggies, multi-plate clutch devices are used in order to transmit or cut off engine power and other power to a transmission. This multi-plate clutch device comprises a clutch housing connected to the crankshaft side of the engine, an output side rotating body connected to the transmission side, and a clutch unit for transmitting and disconnecting power between them. And a pressure plate for pressing the clutch portion. In the clutch portion, a first clutch plate engaged with the clutch housing and a second clutch plate engaged with the output side rotating body are alternately arranged.

The rotation of the crankshaft is transmitted to the transmission side by pressing the clutch plates with a pressure plate such as a spring by means of a pressure plate. When the clutch is turned off (the transmission of the rotation is cut off), the operator holds the latch lever to activate the release mechanism, and the release mechanism releases the pressure on the pressing member, thereby disclosing the first and second clutches. The pressure contact between the plates is released.

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-222159

Disclosure of the invention

In the clutch device as described above, the power transmission capacity is determined by the pressing force (pressing load) of the pressing member and the capacity of the clutch portion (the number and size of the clutch plates). Therefore, in order to secure the desired power transmission capacity in a small space, it is necessary to increase the pressing load.

On the other hand, in the conventional clutch device for a motorcycle, in order to cut off the connection of the clutch portion It is necessary to cover the same release load as the pressing load by the release mechanism. Since this release load is determined by the force holding the clutch lever, ie, the operating force, if the pressing load is increased, the operating force of the clutch lever is increased accordingly, and the operability is deteriorated. Therefore, the pressing load can not be made very high.

An object of the present invention is to obtain a desired power transmission capacity while reducing the operability of the clutch operation and realizing downsizing.

A clutch device for a motor cycle according to claim 1 is a device that transmits power from the input side member to the output side member and blocks power transmission by the operation of the release mechanism. And a clutch member, a pressure plate, and a pressing member. The clutch housing has a tubular portion and is connected to one of the input side member and the output side member. The rotating body is connected to the other of the input side member and the output side member. The clutch portion is disposed in the cylindrical portion of the clutch housing, and includes one or more plate members for transmitting and blocking power between the clutch housing and the rotating body. The pressure plate is a member for mutually pressing one or more plate members of the clutch portion. The pressing member has a pressing portion for pressing the pressure plate and a lever portion for amplifying the operating force of the release mechanism by a predetermined lever ratio to release the pressing force by the pressing portion.

In this clutch device, the pressing force by the pressing member acts on the clutch portion via the pressure plate, and the clutch portion is turned on (power transmission state). In this state, the power from the input side member is input to, for example, the clutch housing, and further transmitted to the rotating body through the clutch portion and output to the output side member. Conversely, when the power from the input side member is input to the rotating body, this power is transmitted to the clutch housing through the clutch portion and is output to the output side member.

When the clutch is turned off (in the power cut-off state), when the lever portion of the pressing member is operated by the release mechanism, this operation force is amplified at a predetermined lever ratio and acts on the pressing portion. The pressure on the pressure plate is released.

Here, since the operation force by the lever mechanism is amplified by the lever ratio of the lever portion and acts on the pressing portion, compared to the operation force in the conventional clutch device, only by the amount of the lever ratio. The clutch off operation can be performed with a small operating force. That is, when the clutch operating force is set equal to the conventional one, the capacity of the clutch portion can be reduced, so the number of clutch plates constituting the clutch portion can be reduced, and the axial dimension can be reduced. Can.

The clutch device for a motorcycle according to claim 2 is the device according to claim 1, wherein the pressing member is a diaphragm spring having the pressing portion on the outer peripheral portion and the lever portion on the inner peripheral portion. . In this case, the configuration of the pressing member is simplified.

[0012] A clutch device for a motorcycle according to claim 3 is the device according to claim 1 or 2, wherein the clutch housing has a friction portion facing the pressure plate, and the clutch portion engages with the clutch housing. The first clutch plate and the second clutch plate engaged with the rotating body, and the first and second clutch plates are held between the friction portion of the clutch housing and the pressure plate.

Here, the first and second clutch plates constituting the clutch portion are sandwiched between the friction portion of the clutch housing and the pressure plate, and power is transmitted from the clutch housing, the first clutch plate, the second clutch plate, and the second clutch plate. The clutch plate is transmitted by the route of the rotating body.

[0014] A clutch device for a motorcycle according to claim 4 is the device according to claim 1 or 2, wherein the rotating body has a friction portion facing the pressure plate at an outer peripheral portion, and the clutch portion is a clutch The housing has a first clutch plate engaged with the housing and a second clutch plate engaged with the rotary body, and the first and second clutch plates are held between the friction portion of the rotary body and the pressure plate. Be done.

[0015] Here, the first and second clutch plates constituting the clutch portion are sandwiched between the friction portion of the rotating body and the pressure plate, and the power is obtained from the clutch housing, the first clutch plate, the first 2 Clutch plate is transmitted by the route of the rotating body.

[0016] A clutch device for a motorcycle according to claim 5 is the device according to claim 2 or 3, wherein the diaphragm spring has an outer peripheral portion of the pressing portion supported by the cylindrical portion of the clutch housing and an inner periphery of the pressing portion. The part presses the pressure plate, and the inner circumferential part of the lever part is moved by the release mechanism to the opposite side of the pressure plate.

Here, the lever mechanism inner peripheral portion of the diaphragm spring is operated by the release mechanism. As a result, the inner peripheral portion of the pressing portion moves in the direction away from the pressure plate, and the pressing force on the pressure plate by the pressing portion is released.

[0018] A clutch device for a motor cycle according to claim 6 is the device according to claim 2 or 4, wherein in the diaphragm spring, the outer peripheral portion of the pressing portion presses the pressure plate, and the inner peripheral portion of the pressing portion is rotated. It is supported by the outer periphery of the body, and the inner periphery of the lever portion is moved to the pressure plate side by the release mechanism.

Here, when the lever mechanism inner peripheral portion of the diaphragm spring is operated by the release mechanism, the outer peripheral portion of the pressing portion moves away from the pressure plate, and the pressing portion presses the pressure plate. The pressure is released.

Here, since the inner peripheral portion of the pressing portion of the diaphragm spring is supported by the outer peripheral portion of the rotating body, the structure for supporting the diaphragm spring is simplified, and the axial dimension is also shortened. In a general automobile clutch device, in which the clutch spring is turned off by operating the inner peripheral end of the diaphragm spring to the engine side, the inner peripheral portion of the pressing portion of the diaphragm spring is supported by the clutch cover There is. In this clutch cover support structure, the outer periphery of the clutch cover is supported by the portion extending to the inner peripheral side so as to cover the outer peripheral force on the outer side of the diaphragm spring. Such a structure requires a relatively long space in the axial direction to support the diaphragm spring. However, in the invention according to the claims, as described above, since the diaphragm spring is supported by the outer peripheral portion of the rotating body, the support can be performed in a relatively short axial space.

[0021] A motorcycle clutch device according to claim 7 is the device according to any one of claims 1 to 6, wherein the diaphragm spring is restricted from rotating relative to the release mechanism. Here, the force with which the inner peripheral portion of the lever portion of the diaphragm spring abuts against the release mechanism If there is relative rotation at this contact portion, abnormal wear may occur at the contact portion. Therefore, in the invention according to this claim, the relative rotation between the diaphragm spring and the release mechanism is restricted, and the wear of the contact portion between the both is suppressed.

[0022] A motorcycle clutch device according to claim 8 is the device according to claim 6, wherein the relative rotation of the diaphragm spring with the rotating body is restricted. Here, in the device of claim 6, Since the inner peripheral portion of the pressing portion of the diaphragm spring is supported by the rotating body, there is a possibility that abnormal wear may occur at the contact portion of the both if there is relative rotation at this supporting portion. Therefore, in the invention according to the present claim, the relative rotation between the diaphragm spring and the rotating body is restricted, and the wear of the contact portion between the both is suppressed.

Brief description of the drawings

FIG. 1 is a longitudinal sectional view of a motorcycle clutch device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a motorcycle clutch device according to a second embodiment of the present invention. Explanation of sign

[0024] 1, 51 clutch housing

2, 52 Output side rotating body

3, 53 clutch words

4, 54 plate plate

5, 55 diaphragm spring

5a, 55a pressing part

5b, 55b lever part

6, 56 Release member

10a, 67 Friction part

31a, 56a Uneven parts

BEST MODE FOR CARRYING OUT THE INVENTION

First Embodiment

FIG. 1 shows a first embodiment of a motorcycle clutch device according to the present invention for transmitting power from the engine crankshaft to a transmission and for interrupting the power by operating the release mechanism. It is. This clutch device includes a clutch housing 1, an output side rotating body 2, a clutch portion 3 for transmitting and receiving power between the clutch housing 1 and the output side rotating body 2, and a pressure plate A diaphragm spring 5 and a release member 6 are provided.

<Clutch housing> The clutch housing 1 has a disc-shaped portion 10 and a cylindrical portion 11 which also extends outward in the axial direction (rightward in FIG. 1) of the force on the outer peripheral side of the disc portion 10. An input gear 13 is attached to the disc portion 10 via a plurality of annular rubber members 12. The input gear 13 is engaged with a drive gear (not shown) fixed to a crankshaft on the engine side. The rubber member 12 is provided to absorb the vibration of the engine force, and another coil spring or the like may be used. Further, a friction portion 10 a is formed on the outer peripheral portion of the disc portion 10 at a position facing the pressure plate 4. The friction portion 10a is formed to be thicker than the other portions of the disk portion 10, and the side surface is a friction surface. In the cylindrical portion 11, splines 11a are formed on the inner peripheral portion, and in the cylindrical portion 11, a plurality of axially extending notches l ib are formed at predetermined intervals in the circumferential direction. The notch l ib is for releasing the internal lubricating oil to the outer peripheral side.

The output side rotating body 2 is formed in a disk shape, and splines 15 are formed on the outer peripheral portion, and spline holes 16 are formed on the inner peripheral portion. And, the spline hole 16 in the inner peripheral part is in mesh with the input shaft 17 of the transmission. A thrust plate 18 is provided between the inner peripheral portion of the input gear 13 and the inner peripheral portion of the output side rotating body 2.

Clutch part>

The clutch unit 3 has one first clutch plate 20 and two second clutch plates 21. Both clutch plates 20 and 21 are both formed annularly and alternately arranged in the axial direction. Further, splines are formed on the outer peripheral portion of the first clutch plate 20, and the splines are engaged with splines 11 a formed on the inner peripheral portion of the cylindrical portion 11 of the clutch housing 1. Further, in the second clutch plate 21, friction facings are attached to both surfaces, and splines are formed on the inner peripheral portion. The inner peripheral splines are in mesh with the splines 15 formed on the outer periphery of the output side rotating body 2.

[0029] <plate plate>

The pressure plate 4 is an annular member, and is disposed axially outside the second clutch plate 21 disposed on the outermost side. A spline 4 a is formed on the outer periphery of the pressure plate 4, and the spline 4 a is formed on the cylindrical portion 11 of the clutch housing 1. I'm in love with Spline 11a. Further, on the inner peripheral end of the axially outer surface of the pressure plate 4, a pressing projection 4b which is annular and protrudes outward in the axial direction is formed.

[0030] <diaphragm spring>

The diaphragm spring 5 is an annular plate member, has a pressing portion 5a as a disc spring on the outer peripheral portion, and has a lever portion 5b on the inner peripheral portion for releasing the pressing of the pressing portion 5a. Here, a stop ring 25 is fixed to the axially outer end of the cylindrical portion 11 of the clutch housing 1. An outer peripheral portion of the pressing portion 5a is supported by the stopper ring 25 via the wire ring 26, and an inner peripheral portion is supported by the pressing projection 4b of the pressure plate 4 !. In the state where such a diaphragm spring 5 is set as shown in FIG. 1, the pressing force of the disc spring presses the pressure plate 4 axially inward with a predetermined pressing force. Therefore, the first and second clutch plates 20 and 21 of the clutch portion 3 are held between the friction portion 10 a of the clutch housing 1 and the pressure plate 4.

The lever portion 5b of the diaphragm spring 4 is formed of a plurality of levers arranged in a radial manner.

The release member 6 is shaped as if the top of a conical cup is removed, and the locking flange 30 at the axially inner end, the cylindrical portion 31 parallel to the rotation axis, and the axially inner to outer side And a bearing support portion 33. The inclined cylindrical portion 32 has a gradually decreasing outer diameter in accordance with the above. The locking flange 30 is also formed so that the axially inner end force of the release member 6 also extends radially outward, and a contact portion 30 a that protrudes axially outward is formed. The contact portion 30 a is in contact with the inner peripheral end of the diaphragm spring 5 from the inside in the axial direction. The outer circumferential portion of the cylindrical portion 31 is formed with a concavo-convex portion 31a in the circumferential direction in which the inner circumferential tip of the lever of the diaphragm spring 5 can be locked. The bearing support portion 33 supports the release bearing 40, and has a locking portion 33a that locks the outer surface of the release bearing 40 in the axial direction. The release bearing 40 can be moved axially outward by operation of a clutch lever of a motorcycle (not shown).

<Operation> Next, the operation will be described.

In the state shown in FIG. 1, as described above, the pressure plate 4 is pressed inward in the axial direction by a predetermined pressing force by the pressing portion 5 a of the diaphragm spring 5, and The clutch plates 20 and 21 are held between the friction portion 10 a of the clutch housing 1 and the platen plate 4. In this case, the clutch is on, and the rotation input through the input gear 13 and the rubber member 12 is also transmitted to the first clutch plate 20 through the clutch housing 1 and the second clutch plate 21. Is transmitted to the output side rotating body 2 and transmitted to the transmission input shaft 17.

On the other hand, when the driver grips the clutch lever, the operation force is transmitted to the release bearing 40 via the clutch wire or the like, and the release bearing 40 is moved axially outward. The movement of the release bearing 40 is transmitted to the lever portion 5a of the diaphragm spring 5 via the release member 6, and the inner peripheral portion of the lever portion 5b is moved axially outward. Then, the inner peripheral portion of the pressing portion 5 a which is the radial direction intermediate portion of the diaphragm spring 5 similarly moves outward in the axial direction, and the pressing portion 5 a separates from the pressing protrusion 4 b of the pressure plate 4. As a result, the pressing force of the pressure plate 4 is released, and the clutch unit 3 is turned off. In this clutch off state, the rotation from the clutch housing 1 is not transmitted to the output side rotating body 2.

Here, at the time of the release operation of the clutch off, the operation force is reduced by the action of the lever portion 5b. More specifically, assuming that the pressing force by the pressing portion 5a of the diaphragm spring 5 is P, for example, the release load R must be applied to the lever portion 5b in order to release the pressing force P.

R = P X (L1 / L2)

L1: The distance from the support portion of the pressing portion outer peripheral portion to the pressing point of the pressing portion inner peripheral portion L2: The distance from the support portion of the pressing portion outer peripheral portion to the contact portion of the lever portion with the release member. That is, the release load is reduced by the lever ratio (L1ZL2). Therefore, when setting the same release load as the conventional device, the pressing load of the pressing portion 5a can be increased by the lever ratio, and when making the transmission capacity of the clutch the same, the clutch plate You can reduce the number of Therefore, the clutch device is made compact It is possible to

Further, in this device, the tip end of the lever of the lever portion 5b is engaged with the concavo-convex portion 31a formed on the cylindrical portion 31 of the release member 6, and the relative position between the diaphragm spring 5 and the release member 6 Rotation is regulated. Therefore, the wear at the contact portion between the diaphragm spring 5 and the release member 6 can be suppressed.

Second Embodiment

FIG. 2 shows a second embodiment of a motorcycle clutch device according to the present invention. In the first embodiment, the clutch is disengaged by pulling the release bearing outward in the axial direction. However, in the second embodiment, the release bearing is pushed inward in the axial direction, contrary to the first embodiment. Thus, the clutch is disengaged. Other configurations are basically the same, and the same members are denoted by the same reference numerals.

This device includes a clutch housing 51, an output side rotating body 52, a clutch portion 53, a pressure plate 54, a diaphragm spring 55, and a release member 56.

The clutch housing 51 has a disc-shaped portion 60 and a cylindrical portion 61 which also extends outward in the axial direction (right side in FIG. 1) of the outer circumferential side force of the disc portion 60. As in the first embodiment, the input gear 13 is attached to the disc portion 60 via a plurality of annular rubber members 12. In the cylindrical portion 61, splines 61a are formed on the inner peripheral portion, and in the cylindrical portion 11, a plurality of axially extending notches 6 lb are formed at predetermined intervals in the circumferential direction !, Ru.

The output side rotating body 52 is formed in a substantially disc shape, and the spline 65 is formed on the outer peripheral portion, and the spline hole 66 is formed on the inner peripheral portion. And, the spline hole 66 on the inner periphery is engaged with the input shaft 17 of the transmission. Further, at the outer peripheral portion of the output side rotating body 52, a disc-like friction flange 67 extending further outward in the radial direction is formed at the axially inner end portion. Furthermore, a plurality of support protrusions 52a are formed at predetermined intervals in the circumferential direction on the outer peripheral end of the axially outer surface of the output side rotation body 52. Further, a support member 68 for supporting the diaphragm spring 55 on the output side rotating body 52 is fixed to the output side rotating body 52 by a bolt 69. The support member 68 is an annular member, and the inner peripheral end thereof is connected to the output-side rotating body 52 by an inlay. At the outer peripheral end of the support member 68, an annular support protrusion 68a protrudes inward in the axial direction so as to face the support protrusion 52a of the output side rotating body 52.

Clutch part>

The clutch portion 53 has two first clutch plates 20 and one second clutch plate 21 and is alternately arranged in the axial direction. The configuration of both clutch plates 20 and 21 is the same as that of the first embodiment.

The pressure plate 54 is an annular member, and is disposed axially outward of the outermost first clutch plate 20. An axially inner surface of the pressure plate 54 protrudes axially inward at an end portion on the inner peripheral side to form a spline 54 a, and the spline 54 a is an outer peripheral spline of the output side rotating body 52. I am in love with 65. In addition, an annular restricting portion 54b that protrudes in the axial direction is formed on the outer peripheral portion of the axially outer surface of the pressure plate 54, and further, in the inner peripheral side of the restricting portion 54b, it protrudes in the axial direction. A pressing projection 54c is formed. The restricting portion 54b protrudes axially outward from the pressing projection 54c.

[Diaphragm spring]

The diaphragm spring 55 is an annular plate member, and has a pressing portion 55a as a disc spring on the outer peripheral portion, and a lever portion 55b for releasing the pressing of the pressing portion 55a on the inner peripheral portion. The diaphragm spring 55 is arranged such that the outer peripheral portion thereof is located on the inner peripheral side of the restriction portion 54 a of the pressure plate 54. The pressing portion 5a of the diaphragm spring 55 has an outer peripheral portion supported by the pressing projection 54c of the pressure plate 54, and an inner peripheral portion thereof is the supporting projection 52a of the output side rotating body 52 and the supporting projection of the supporting member 68. It is supported by being held by 68a. When such a diaphragm spring 55 is set as shown in FIG. 2, the biasing force of the disc spring presses the pressure plate 54 axially inward with a predetermined pressing force. Therefore, the first and second clutch The points 20 and 21 are held between the friction portion 67 of the output side rotating body 52 and the pressure plate 4.

Also, the lever portion 55b of the diaphragm spring 54 is formed of a plurality of levers arranged in a radial manner. A slit and an oval shaped notch are formed between two levers adjacent in the circumferential direction, and a part of the support member 68 passes axially through the oval notch. And abuts against the axially outer surface of the output side rotating body 52. Thus, the relative rotation between the support member 68 and the output side rotating body 52 and the diaphragm spring 55 is restricted by a part of the support member 68 passing through the notch of the lever portion 55b of the diaphragm spring 55. There is.

The release member 56 is an annular block member, and an uneven portion 56a is formed in the circumferential direction at the axially inner end, with which the inner peripheral tip end of the lever of the diaphragm spring 55 can be locked. Further, a bearing support portion 56 b is formed on the axially outer side of the release member 56, and the bearing support portion 56 b is fitted to an axially inner shoulder portion of the outer ring of the release bearing 40. The release bearing 40 can be moved inward in the axial direction by the operation of a clutch lever of a motor cycle (not shown).

Next, the operation will be described.

In the state shown in FIG. 2, as described above, the pressing plate 55 is pressed inward in the axial direction by the pressing portion 55 a of the diaphragm spring 55 with a predetermined pressing force. The second clutch plates 20 and 21 are held between the friction portion 67 of the output side rotating body 52 and the plate 54. In this case, the clutch is on, and the rotation input from the crankshaft via the input gear 13 and the rubber member 12 is transmitted to the first clutch plate 20 via the clutch housing 51, and further the second clutch plate 21 are transmitted to the output side rotating body 52 and transmitted to the input shaft 17 of the transmission.

On the other hand, when the driver grips the clutch lever, the operation force is transmitted to the release bearing 40 via the clutch wire or the like, and the release bearing 40 is moved axially inward. The movement of the release bearing 40 is performed by the diaphragm spring through the release member 56. The inner peripheral portion of the lever portion 55b is moved axially inward by being transmitted to the lever portion 55a of the hook 55. Then, with the radially intermediate portion of the diaphragm spring 55 as a fulcrum, the outer peripheral portion of the pressing portion 55 a moves axially outward, and the pressing portion 55 a separates from the pressing projection 54 c of the pressure plate 54. As a result, the pressing force of the pressure plate 54 is released, and the clutch portion 53 is turned off. In this clutch off state, the rotation from the clutch housing 51 is not transmitted to the output side rotator 52.

Here, at the time of the release operation of the clutch off, the operation force is reduced by the action of the lever portion 55b. More specifically, assuming that the pressing force by the pressing portion 55a of the diaphragm spring 55 is P, for example, the release load R must be applied to the lever portion 55b in order to release the pressing force P.

R = P X (L3 / L4)

L3: The distance from the support portion of the inner peripheral portion of the pressing portion to the pressing point of the outer peripheral portion of the pressing portion L4: The distance from the support portion of the inner peripheral portion of the pressing portion to the contact portion with the release member of the lever portion. That is, the release load is reduced by the lever ratio (L3ZL4). Therefore, when setting the same release load as the conventional device, the pressing load of the pressing portion 55a can be increased by the lever ratio, and when making the transmission capacity of the clutch the same, the clutch plate The number can be reduced. Therefore, the clutch device can be made compact.

Further, in this device, the tip end of the lever of the lever portion 55b is engaged with the uneven portion 56a of the release member 56, so that relative rotation between the diaphragm spring 55 and the release member 56 is restricted. Therefore, wear at the contact portion between diaphragm spring 55 and release member 56 can be suppressed. Further, the support member 68 passes through the notch of the lever portion 55 b of the diaphragm spring 55 and is fixed to the output side rotating body 52, whereby the diaphragm spring 55 and the output side rotating body 52 and the support member 68 The relative rotation is restricted, and the wear at the contact portion between each of the supporting projections 52a, 68a and the diaphragm spring 55 can be suppressed.

Furthermore, in the second embodiment, the diaphragm spring 55 needs to be supported at the middle in the radial direction, that is, the inner peripheral portion of the pressing portion 55 a, but the outer peripheral portion of the output side rotating body 52 is The Since it is supported from the inner peripheral side, it can be supported in a simple and small space, as compared with the support structure by the clutch cover of the conventional clutch device for an automobile.

Other Embodiments

In each of the above-described embodiments, the present invention can be similarly applied to the case where the transmission path of the force rotation is the reverse described in the case where the rotation is input from the input gear and output to the output side rotating body.

Industrial applicability

In the clutch apparatus for a motorcycle according to the present invention, a desired power transmission capacity can be obtained without reducing the operability of the clutch operation and achieving downsizing.

Claims

The scope of the claims

[1] A motorcycle clutch device for transmitting power of an input side member to an output side member and interrupting power transmission by operation of a release mechanism,

A clutch housing having a tubular portion and connected to one of the input side member and the output side member;

A disk-shaped rotating body connected to the other of the input side member and the output side member, and disposed in the cylindrical portion of the clutch housing for transmitting and blocking power between the clutch housing and the rotating body A clutch portion having one or more plate members for

A pressure plate for pressing the plate members of the clutch portion to each other, a pressing portion for pressing the pressure plate, and an operating force of the release mechanism are amplified at a predetermined lever ratio to be pressed by the pressing portion A pressing member having a lever portion for releasing pressure;

Clutch device for motorcycles.

[2] The motorcycle clutch device according to claim 1, wherein the pressing member is a diaphragm spring having the pressing portion at an outer peripheral portion and the lever portion at an inner peripheral portion.

[3] The clutch housing has a friction portion facing the pressure plate,

The clutch portion has a first clutch plate engaged with the clutch housing and a second clutch plate engaged with the rotary body, and the first and second clutch plates are friction portions of the clutch housing. The clutch device for a motor cycle according to claim 1, wherein the clutch device is sandwiched between the pressure plate and the pressure plate.

[4] The rotating body has a friction portion facing the pressure plate at an outer peripheral portion thereof,

The clutch portion has a first clutch plate engaged with the clutch housing and a second clutch plate engaged with the rotary body, and the first and second clutch plates are friction portions of the rotary body. Sandwiched between the and the pressure plate,

A clutch device for a motorcycle according to claim 1.

[5] The diaphragm spring is

An outer peripheral portion of the pressing portion is supported by a cylindrical portion of the clutch housing, and the pressing portion The inner circumferential portion of the pressure plate presses the pressure plate,

The inner circumferential portion of the lever portion is moved by the release mechanism to the opposite side of the pressure plate.

The clutch device for a motorcycle according to claim 2.

[6] The diaphragm spring is

An outer circumferential portion of the pressing portion presses the pressure plate, and an inner circumferential portion of the pressing portion is supported by the outer circumferential portion of the rotating body,

The inner circumferential portion of the lever portion is moved toward the pressure plate by the release mechanism.

The clutch device for a motorcycle according to claim 2.

[7] The diaphragm spring is restricted from rotating relative to the release mechanism.

A clutch device for a motorcycle according to claim 1, V.

[8] The diaphragm spring may be restricted in relative rotation with the rotating body.

The clutch device for a motorcycle according to 6.