JP3894454B2 - Motorcycle clutch device - Google Patents

Description

  The present invention relates to a clutch device, and more particularly to a motorcycle clutch device capable of transmitting power from an input side member to an output side member and interrupting power transmission by operating a release mechanism.

  In many cases, a centrifugal clutch is used for a motorcycle starting clutch device. In this centrifugal clutch, when power from the engine is transmitted to the centrifugal clutch, the centrifugal force moves to the outer peripheral side by centrifugal force, This centrifuge is frictionally engaged with a clutch housing or the like, and power is transmitted from the input side shaft to the output side shaft (see Patent Document 1).

  Further, in such a centrifugal clutch, there is also an apparatus provided with a release mechanism for forcibly shutting off power. The centrifugal clutch provided with the release mechanism includes a multi-plate clutch and a centrifuge, and enters a power transmission state by pressing the multi-plate clutch by the operation of the centrifuge. Further, the power can be cut off (clutch off) by forcibly pulling the centrifuge away from the multi-plate clutch by the release mechanism.

Such a centrifugal clutch is arranged on a first shaft having a high engine speed so as to obtain a centrifugal force sufficient to connect the clutch.
JP-A-6-280901

  In the above clutch device, the centrifuge is forcibly separated at the time of shifting, and the clutch is in a power cut-off state. Thereafter, after the shift is performed, the clutch is again in the power transmission state. However. At this time, since the clutch device is mounted on the first shaft to which power from the engine is directly transmitted, the number of rotations of the clutch is high, and a large impact is likely to occur when the clutch is engaged after the shift.

  An object of the present invention is a centrifugal clutch device capable of forcibly releasing clutch connection, and is to reduce an impact when the clutch is brought into a power transmission state at the time of shifting.

The motorcycle clutch device according to claim 1 is provided on a second shaft disposed in parallel with a first shaft provided coaxially with the crankshaft of the engine, transmits power to the transmission, and operates the release mechanism. Is a motorcycle clutch device capable of interrupting power transmission, and includes a clutch housing, a disk-shaped rotating body, a clutch portion, a pressure plate, a lever plate, a centrifuge, and a release mechanism. The clutch housing is rotatably supported on the second shaft, and power is input from the first shaft. The disk-shaped rotating body is provided on the inner peripheral portion of the clutch housing and is connected to the second shaft. A clutch part is a part for performing transmission and interruption | blocking of motive power between a clutch housing and a rotary body. The pressure plate is a member for pressing the clutch portion. The lever plate is in contact with the pressure plate and has a plurality of levers. The centrifuge is attached to the lever of the lever plate and presses the lever plate against the pressure plate by the centrifugal force accompanying the rotation of the lever plate. The release mechanism releases the pressure on the pressure plate of the lever plate. The lever plate is a diaphragm spring having a plate portion disposed on the outer peripheral side and a lever portion composed of a plurality of levers extending from the plate portion to the inner peripheral side, and the outer peripheral end of the plate portion is supported by the clutch housing. In addition, the inner peripheral end of the lever portion is supported by the release mechanism, and the inner peripheral end of the lever portion is positioned closer to the clutch portion than the outer peripheral end of the plate portion.

  In this clutch device, when the engine power is transmitted to the second shaft through the first shaft, the lever plate rotates through the clutch housing and the like, and the pressure plate is driven by the centrifugal force of the centrifuge mounted on the lever plate. Presses the plate members of the clutch portion to each other, whereby the clutch portion enters a power transmission state. At this time, the power transmitted from the second shaft is transmitted to the output side member via the clutch portion.

  Here, since the clutch portion is provided on the second shaft having a relatively low rotational speed, the impact at the time of clutch connection can be reduced.

In this clutch device, since the lever plate is formed by a diaphragm spring, the lever plate is set so that the lever plate does not press the clutch portion when centrifugal force is not acting on the centrifuge. A member such as a return spring for returning to the blocking position becomes unnecessary. On the contrary, the return member for returning the lever plate to the original position after the lever plate is operated by the release mechanism becomes unnecessary. Further, the axial dimension can be shortened here, and the clutch device can be downsized.

The motorcycle clutch device according to claim 2 is the motorcycle clutch device according to claim 1 , wherein the centrifuge is attached to the lever at a position closer to the clutch portion than the outer peripheral end support portion of the plate portion. Yes.

  Here, the centrifuge moves the lever plate toward the centrifugal clutch portion by the rotation of the lever plate.

Motorcycle clutch device according to claim 3, a motor cycle clutch device according to claim 1 or 2, Enshinko the plate-shaped member wound around at least a portion of the plurality of levers of the diaphragm spring It is.

  Here, the present invention can be implemented with a simple configuration.

A motorcycle clutch device according to a fourth aspect is the motorcycle clutch device according to the second or third aspect , wherein the pressing load on the clutch portion can be adjusted by changing the position where the centrifuge is mounted.

  Here, it is possible to easily change the weight applied to the clutch portion.

  According to the present invention, it is possible to reduce the impact at the time of clutch connection and to obtain a pressing force to the clutch portion necessary for clutch connection.

[Constitution]
As shown in FIG. 1, a motorcycle clutch device 1 according to an embodiment of the present invention is provided on a second shaft 2 arranged in parallel with a first shaft 31 provided coaxially with a crankshaft of an engine. The engine power can be transmitted to the second shaft 2 and the power transmission can be forcibly interrupted by the operation of the release mechanism 4. The motorcycle clutch device 1 includes a clutch housing 5, an output side rotating body 3, a clutch portion 6, a pressure plate 7, a diaphragm spring 8, a release mechanism 4, and a centrifuge 9. Yes.

  The clutch housing 5 is a member that is rotatably supported by the second shaft 2, and as shown in FIG. 1, extends from the outer peripheral side of the disk portion 5a to the outer side in the axial direction. It has the 1st cylindrical part 5b and the comparatively small diameter 2nd cylindrical part 5c. An input gear 12 is attached to the disc portion 5a. The input gear 12 meshes with a drive gear 32 that is rotatably supported by the first shaft 31 on the engine side, and is a member to which power from the first shaft 31 is transmitted. The input gear 12 is provided with a plurality of rubber members 50 for absorbing an impact from the engine. The 1st cylindrical part 5b has the spline for engaging with the clutch part 6 mentioned later on the inner peripheral side. A one-way clutch 40 that does not transmit power from the first shaft 31 but transmits power from the second shaft 2 is disposed in the second cylinder upper portion 5c. The second cylindrical portion 5 c is supported on the second shaft 2 via the one-way clutch 40.

  The output-side rotator 3 is a member provided on the inner peripheral portion of the clutch housing 5 and connected to the second shaft 2. As shown in FIG. 1, the output-side rotator 3 is formed in a substantially disk shape. A spline 3 a is formed on the outer peripheral portion, and a spline hole 3 b is formed on the inner peripheral portion. The spline hole 3b in the inner periphery meshes with the second shaft 2.

  The clutch unit 6 has a plurality of plate members for transmitting and blocking power between the clutch housing 5 and the output side rotating body 3. The clutch unit 6 includes three first clutch plates 14 and four second clutch plates 15. Both the clutch plates 14 and 15 are formed in an annular shape and are alternately arranged in the axial direction. A plurality of outwardly projecting engagement protrusions 14 a are formed on the outer periphery of the first clutch plate 14, and the engagement protrusions 14 a mesh with the splines of the cylindrical portion of the clutch housing 5. The second clutch plate 15 has friction facings on both sides. The second clutch plate 15 has a spline 15 a formed on the inner peripheral portion thereof, and the spline 15 a on the inner peripheral portion is engaged with a spline 3 a formed on the outer periphery of the output side rotating body 3.

  The pressure plate 7 is an annular member for pressing the plurality of plate members 14 and 15 of the clutch portion 6 to each other, and is further disposed on the outer side in the axial direction of the second clutch plate 15 disposed on the outermost side in the axial direction. ing. A spline 7 a is formed on the outer periphery of the pressure plate 7, and the spline 7 a meshes with the spline of the cylindrical portion 5 b of the clutch housing 5. A plurality of pressing protrusions 7b that are annular and protrude outward in the axial direction are formed at the inner peripheral end of the axially outer surface of the pressure plate 7.

  The diaphragm spring 8 is a member that comes into contact with the pressure plate 7, and has an annular plate 8a on the outer peripheral side as shown in FIGS. 1 and 2, and a plurality of levers 8e on the inner peripheral side of the annular plate 8a. It has the lever part 8b comprised by these. The annular plate 8 a has protrusions protruding toward the outer peripheral side at three locations on the clutch housing 5 side, and the protrusions engage with the inner peripheral side of the clutch housing 5. The inner peripheral side of the annular plate 8 a is in contact with the annular pressing protrusion 7 b of the pressure plate 7, and the outer peripheral side of the annular plate 8 a is supported by the stopper ring 25 via the wire ring 20. The annular plate 8a is arranged on the pressure plate 7 side on the inner peripheral side rather than on the outer peripheral side. The lever portion 8b has a plurality of levers 8e. The lever 8e has a support portion 8c that is disposed on the innermost peripheral side and is supported by a release mechanism 4 described later, and a connecting portion 8d that connects the support portion 8c and the annular plate 8a. The inner peripheral end of the lever portion 8b is located closer to the clutch portion 6 than the outer peripheral end of the annular plate 8a. The support portion 8c is disposed closer to the clutch portion 6 than the contact point between the diaphragm spring 8 and the pressure plate 7, and is supported by a release mechanism 4 described later. The connecting portion 8d connects the annular plate 8a and the support portion 8c in a plane, and a centrifuge 9 described later is attached as shown in FIG. Thus, since the center of gravity of the combined diaphragm spring 8 and centrifuge 9 is on the side of the axial clutch portion 6 with respect to the annular plate 8a, the annular plate 8a becomes the centrifuge when the motorcycle clutch device 1 rotates. It is pressed to the clutch part 6 side by centrifugal force acting on the.

  The release mechanism 4 is a mechanism for releasing the pressing load of the diaphragm spring 8 against the pressure plate 7, and includes a release member 4a, a release bearing 4b, a first retaining ring 4c, and a second retaining ring 4d. . The release member 4a is a disk-shaped member having a cylindrical portion 4f on the inner peripheral side. As shown in FIG. 2, a plurality of projecting portions 4h projecting toward the clutch housing 5 are disposed on the outer peripheral side of the cylindrical portion 4f, and a lever portion 8b of the diaphragm spring 8 is disposed between two adjacent projecting portions 4h. Has been. A release bearing 4b is connected to the inner peripheral side of the cylindrical portion 4f. As shown in FIG. 2, the first retaining ring 4c is an annular member that is disposed on the transmission side of the release bearing 4b and lacks a part thereof. 4 d of 2nd retaining rings are arrange | positioned at the outer peripheral side of the cylindrical part 4f. Further, a plurality of protrusions 4e protruding outward in the axial direction are arranged on the disk-shaped portion 4g of the release member 4a, and the shaft of the support portion 8c of the diaphragm spring 8 is formed by the protrusions 4e and the second retaining ring 4d. Directional movement is restricted.

  The centrifuge 9 is a metal plate-like member, and is wound around the lever portion 8b of the diaphragm spring 8 as shown in FIG. The centrifuge 9 presses the diaphragm spring 8 toward the pressure plate 7 as the diaphragm spring 8 rotates. When adjusting the pressing force to the clutch part 6, it can be changed by adjusting the position of the centrifuge 9 on the lever 8e. Specifically, when it is desired to increase the pressing force, the centrifuge 9 is moved to the outer peripheral side.

[Operation]
Next, the operation will be described.

  The power of the first shaft 31 connected to the engine is transmitted to the clutch housing 5 via the drive gear 32 and the input gear 12. Since the protrusion on the outer peripheral side of the annular plate 8a of the diaphragm spring 8 and the inner peripheral side of the clutch housing 5 are engaged, the power of the clutch housing 5 is transmitted to the diaphragm spring 8 and the diaphragm spring 8 rotates. . At this time, the support portion 8c of the lever 8e is positioned closer to the clutch portion 6 than the outer peripheral end of the annular plate 8a, and the connecting portion 8d of the lever 8e connects the annular plate 8a and the supporting portion 8c in a plane and connects to the connecting portion 8d. Since the centrifuge is arranged, the diaphragm spring 8 is elastically deformed by the centrifugal force, and the annular plate 8a presses the pressure plate 7 toward the clutch portion 6 side. Further, since the centrifuge 9 is attached to the connecting portion 8 d of the diaphragm spring 8, the diaphragm spring 8 is further pressed toward the clutch portion 6 by the centrifugal force acting on the centrifuge 9. Due to this pressing force, the clutch portion 6 changes from the power cutoff state to the power transmission state. In this case, the power transmitted to the input gear 12 is sequentially transmitted to the clutch housing 5, the second clutch plate 14, and the first clutch plate 15, and is transmitted from the first clutch plate 15 to the output-side rotator 3. Thereafter, power is transmitted from the output side rotating body 3 to the second shaft 2.

  When the rotational speed of the diaphragm spring 8 is lowered, the centrifugal force acting on the diaphragm spring 8 is reduced, the pressure applied to the pressure plate 7 by the centrifuge 9 and the diaphragm spring 8 is weakened, and the elastic deformation of the diaphragm spring 8 is released. The At this time, the pressing force applied from the pressure plate 7 to the clutch portion 6 is weakened and the power is cut off. However, the diaphragm spring 8 returns to the original state by its own elastic force, so that the power transmission state is cut off. No additional member is required, and the number of parts is reduced.

  When shifting, it is necessary to force the clutch to be in a power cut-off state. In this case, the release bearing 4b is moved outward in the axial direction from the state shown in FIG. Then, the lever portion 8b of the diaphragm spring 8 moves outward in the axial direction via the release member 4a. Accordingly, the inner peripheral side of the annular plate 8 a of the diaphragm spring 8 moves outward in the axial direction, and the inner peripheral side of the annular plate 8 a is separated from the pressing protrusion 7 b of the pressure plate 7. At this time, the pressing force to the clutch portion 6 of the pressure plate 7 is released, and the clutch portion 6 enters a power cut-off state. After that, after shifting is performed, the power transmission state is restored. At this time, since the clutch device 1 is provided on the second shaft 2 having a relatively low rotational speed, it is difficult for abnormal noise and impact to occur when the clutch is engaged. Here, when the release force is released after the clutch is forcibly disconnected by the release mechanism 4, the diaphragm spring 8 returns to its original state by its own elastic force. For this reason, a return member is unnecessary and the number of parts can be reduced.

[Other Embodiments]
In the above embodiment, the centrifuge 9 is mounted on all the lever portions 8b of the diaphragm spring 8, but the present invention may mount the centrifuge on some levers without mounting the centrifuge on all levers. . In the embodiment, a pull-type clutch device is used, but a push-type clutch device may be used. Furthermore, although the multi-plate clutch portion is used in the above embodiment, a single-plate clutch portion may be used.

The figure which described the 1st axis | shaft 31 and the drive gear 32 which were attached to the engine in FIG. The figure which looked at the clutch apparatus 1 for motorcycles concerning one Embodiment of this invention from the transmission side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motorcycle clutch apparatus 3 Output side rotary body 4 Release mechanism 5 Clutch housing 6 Clutch part 7 Pressure plate 8 Diaphragm spring 9 Centrifuge

Claims (4)

A motorcycle clutch provided on a second shaft arranged in parallel with a first shaft provided coaxially with the crankshaft of the engine and capable of transmitting power to the transmission and interrupting transmission of power by operating a release mechanism A device,
A clutch housing that is rotatably supported by the second shaft and receives power from the first shaft;
A disc-shaped rotating body provided on the inner periphery of the clutch housing and connected to the second shaft;
A clutch portion for transmitting and interrupting power between the clutch housing and the rotating body;
A pressure plate for pressing the clutch part;
A lever plate in contact with the pressure plate and having a plurality of levers;
A centrifuge mounted on the lever of the lever plate and pressing the lever plate against the pressure plate by centrifugal force accompanying rotation of the lever plate;
A release mechanism for releasing the pressure on the pressure plate of the lever plate;
Equipped with a,
The lever plate is a diaphragm spring having a plate portion disposed on the outer peripheral side and a lever portion including a plurality of levers extending from the plate portion to the inner peripheral side, and the outer peripheral end of the plate portion is the clutch housing. The inner peripheral end of the lever portion is supported by the release mechanism, and the inner peripheral end of the lever portion is located closer to the clutch portion than the outer peripheral end of the plate portion.
Motorcycle clutch device. The centrifuge is attached to the lever at a position closer to the clutch part than the outer peripheral end support part of the plate part.
The motorcycle clutch device according to claim 1 . The centrifuge is a plate-like member wound around at least a part of the plurality of levers of the lever plate.
The motorcycle clutch device according to claim 1 or 2 . The pressing load on the clutch part can be adjusted by changing the position where the centrifuge is mounted.
The motorcycle clutch device according to claim 2 or 3 .

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