WO2014185182A1

WO2014185182A1 - Motorcycle clutch device

Info

Publication number: WO2014185182A1
Application number: PCT/JP2014/059438
Authority: WO
Inventors: 義夫今西
Original assignee: 株式会社エクセディ
Priority date: 2013-05-17
Filing date: 2014-03-31
Publication date: 2014-11-20
Also published as: JP2014224580A; CN105164441A

Abstract

A motorcycle clutch device (1) is provided with a clutch housing (2), a clutch center (3), a clutch part (4), a pressure plate (5), a release member (6), and a coil spring (7). The pressure plate (5) has a plurality of protrusions (52) protruding in the axial direction. The coil spring (7) is disposed so as to extend between the clutch center (3) and the release member (6). The urging force of the coil spring (7) sandwiches clutch plates (41, 42) between a friction part (33) of the clutch center (3) and the pressing part (51a) of the pressure plate (5). The coil spring (7) is disposed between the protrusions (52).

Description

Motorcycle clutch device

The present invention relates to a motorcycle clutch device.

Generally, motorcycles such as motorcycles and buggies have a multi-plate clutch device for transmitting or interrupting power from an engine to a transmission. This multi-plate clutch device has a clutch housing, a clutch center, a clutch portion, and a pressure plate.

The clutch housing is connected to the crankshaft side of the engine. The clutch center is connected to the transmission side. The clutch portion transmits and interrupts power between the clutch housing and the clutch center. The pressure plate presses the clutch portion. The clutch part has a first clutch plate and a second clutch plate. The first clutch plate is engaged with the clutch housing, and the second clutch plate is engaged with the clutch center. The first clutch plate and the second clutch plate are alternately arranged in the axial direction.

When the pressure plate is urged by the compression coil spring, the pressure plate presses the clutch portion, and as a result, power is transmitted. Further, the pressure plate moves against the urging force of the compression coil spring, so that the pressing of the clutch portion is released and the power is cut off.

JP-A 61-149618

In the motorcycle clutch device configured as described above, the pressure plate has a protrusion extending in the axial direction. And the compression coil spring is arrange | positioned so that the circumference | surroundings of a projection part may be enclosed. However, since a large load is applied to the protrusion, the protrusion may be deformed from the base.

An object of the present invention is to prevent deformation of the protrusion.

(1) The motorcycle clutch device according to the first aspect of the present invention transmits the power from the input side member to the output side member and interrupts the power transmission by operating the release mechanism. The motorcycle clutch device includes a clutch housing, a clutch center, a clutch portion, a pressure plate, a release member, and a coil spring. The clutch housing is connected to one of the input side member and the output side member. The clutch center is connected to the other of the input side member and the output side member. The clutch center has a friction part. The clutch part has a clutch plate. The clutch plate transmits and interrupts power between the clutch housing and the clutch center. The pressure plate has a pressing portion and a plurality of protrusions. The pressing portion sandwiches the clutch plate with the friction portion. Each protrusion protrudes in the axial direction. The release member is fixed to the pressure plate via the protrusion. A release mechanism is attached to the release member. The coil spring extends between the clutch center and the release member between the protrusions. The coil spring biases the pressure plate so that the friction part and the pressing part come close to each other.

According to this configuration, the coil spring is disposed between the protrusions. That is, the coil spring is not arranged so as to surround the periphery of the protrusion of the pressure plate. Therefore, since the protrusion is not restricted by the shape of the coil spring, for example, the thickness of the protrusion can be made larger than the inner diameter of the coil spring. As a result, the protruding portion can be made to have a more rigid shape, and the protruding portion can be prevented from being deformed from the base.

(2) Preferably, a pressure plate further has a main-body part. The protrusion extends in the axial direction from the main body. The base part of the protrusion becomes thicker toward the main body part side. According to this configuration, the stress concentration between the protrusion and the main body can be dispersed. Therefore, it can prevent more reliably that a projection part deform | transforms from a root.

(3) Preferably, a pressure plate further has a main-body part. The protrusion extends in the axial direction from the main body. The protrusion has a reinforcing portion that connects the main body and the protrusion. According to this structure, it can prevent more reliably that a projection part deform | transforms from a root with a reinforcement part.

(4) The motorcycle clutch device according to the second aspect of the present invention transmits power from the input side member to the output side member and interrupts power transmission by operating the release mechanism. The motorcycle clutch device includes a clutch housing, a clutch center, a clutch portion, a pressure plate, a release member, and a coil spring. The clutch housing is connected to one of the input side member and the output side member. The clutch center is connected to the other of the input side member and the output side member. The clutch center has a friction part. The clutch part has a clutch plate. The clutch plate transmits and interrupts power between the clutch housing and the clutch center. The pressure plate has a pressing portion. The pressing portion sandwiches the clutch plate with the friction portion. The release member has a plurality of protrusions. Each protrusion protrudes in the axial direction. The release member is fixed to the pressure plate via the protrusion. The release mechanism is attached to the release member. The coil spring extends between the clutch center and the release member between the protrusions. The coil spring biases the pressure plate so that the friction part and the pressing part come close to each other.

According to this configuration, the coil spring is disposed between the protrusions. That is, the coil spring is not disposed so as to surround the periphery of the protrusion of the release member. Therefore, since the protrusion is not restricted by the shape of the coil spring, for example, the thickness of the protrusion can be made larger than the inner diameter of the coil spring. As a result, the protruding portion can be made to have a more rigid shape, and the protruding portion can be prevented from being deformed from the base.

(5) Preferably, the Leeds member further has a main body. The protrusion extends from the main body in the axial direction. The base part of the protrusion becomes thicker toward the main body part side. According to this configuration, the stress concentration between the protrusion and the main body can be dispersed. As a result, it can prevent more reliably that a projection part deform | transforms from a root.

(6) Preferably, the release member further has a main body. The protrusion extends in the axial direction from the main body. The protrusion has a reinforcing portion that connects the main body and the protrusion. According to this structure, it can prevent more reliably that a projection part deform | transforms from a root with a reinforcement part.

(7) Preferably, the release member has a first recess. The first recess accommodates the first end of the coil spring. According to this configuration, the coil spring can be stably held.

(8) Preferably, the clutch center has a second recess. The second recess accommodates the second end of the coil spring. According to this configuration, the coil spring can be stably held.

(9) Preferably, the release member has a first protrusion. The first convex portion is inserted into the inner peripheral portion of the first end portion of the coil spring. The clutch center has a second convex portion. The second convex portion is inserted into the inner peripheral portion of the second end portion of the coil spring. According to this configuration, the coil spring can be stably held.

According to the present invention, deformation of the protrusion can be prevented.

Front view of motorcycle clutch device FIG. 2 is a sectional view taken along line AA in FIG. 1. FIG. 2 is a sectional view taken along line BB in FIG. 1. FIG. 6 is a cross-sectional view of Modification 1 corresponding to FIG. 2. It is sectional drawing of the modification 2 corresponding to FIG.

Hereinafter, an embodiment of a motorcycle clutch device according to the present invention will be described with reference to the drawings. 1 is a front view of a motorcycle clutch device, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. In the following description, “axial direction” refers to the horizontal direction in FIGS. 2 and 3, “axially inner” refers to the left side of FIGS. 2 and 3, and “axially outer” refers to FIG. And the right side of FIG.

As shown in FIG. 1 to FIG. 3, the motorcycle clutch device 1 transmits the power from the crankshaft of the engine to the transmission. Further, the motorcycle clutch device 1 cuts off the power transmission by operating the release mechanism.

The clutch device 1 includes a clutch housing 2, a clutch center 3, a clutch portion 4, a pressure plate 5, a release member 6, and a plurality of first coil springs 7 (an example of a coil spring). For example, the clutch device 1 includes four first coil springs 7.

[Clutch housing 2]
As shown in FIG. 2, the clutch housing 2 includes a disc portion 21 and a cylindrical portion 22. The clutch housing 2 is connected to an input gear 10 (an example of an input side member). The input gear 10 is a generally annular member to which power generated by an engine (not shown) is input. The input gear 10 meshes with a drive gear (not shown) fixed to the crankshaft on the engine side.

The disc part 21 has a plurality of protrusions 21a that protrude inward in the axial direction. The protrusions 21a are arranged at predetermined intervals in the circumferential direction. The input gear 10 is connected to the disc portion 21 via the plurality of second coil springs 11. The plurality of protrusions 21 a and the plurality of second coil springs 11 of the disk portion 21 are inserted into holes 10 a formed in the input gear 10.

The clutch housing 2 and the input gear 10 are connected in the axial direction via a plate 12 and a rivet 13. The second coil spring 11 is provided to absorb vibration from the engine.

The cylindrical portion 22 is formed so as to extend outward from the outer peripheral edge of the disc portion 21 in the axial direction. The cylindrical portion 22 has a plurality of cutouts 22a extending in the axial direction. The notches 22a are arranged at a predetermined interval in the circumferential direction.

[Clutch center 3]
The clutch center 3 is disposed on the inner peripheral portion of the clutch housing 2. The clutch center 3 includes a disc part 31, a cylindrical part 32, and a friction part 33. A boss portion 31 a is formed at the center portion of the disc portion 31 so as to protrude inward in the axial direction.

A spline hole 31b extending in the axial direction is formed at the center of the boss 31a. An input shaft (not shown, an example of an output side member) of the transmission engages with the spline hole 31b. A thrust plate 14 is disposed between the boss portion 31 a and the central portion of the input gear 10.

As shown in FIG. 3, the disc part 31 of the clutch center 3 is formed with a plurality of second recesses 31c so as to be recessed inward in the axial direction. For example, the disk part 31 has four second recesses 31c. Each second recess 31 c is formed in the outer peripheral portion of the disc portion 31.

The second recesses 31c are arranged at a predetermined interval in the circumferential direction. In addition, each 2nd recessed part 31c is arrange | positioned facing each 1st recessed part 61a formed in the release member 6. FIG. The second recess 31c accommodates the second end (the axially inner end) of the first coil spring 7.

As shown in FIG. 2, the cylindrical portion 32 extends outward in the axial direction from the outer peripheral edge of the disc portion 31. A plurality of engaging grooves 32 a extending in the axial direction are formed on the outer peripheral surface of the cylindrical portion 32. The engagement grooves 32a are arranged at predetermined intervals in the circumferential direction.

An annular friction portion 33 extends from the axially outer end of the cylindrical portion 32 toward the outer peripheral side. The friction part 33 presses the clutch part 4 toward the inner side in the axial direction.

[Clutch part 4]
The clutch unit 4 has a plurality of first clutch plates 41 and a plurality of second clutch plates 42. For example, the clutch unit 4 includes four first clutch plates 41 and three second clutch plates 42.

The first clutch plates 41 and the second clutch plates 42 are both formed in an annular shape. Further, the first clutch plates 41 and the second clutch plates 42 are alternately arranged in the axial direction.

A plurality of engaging protrusions protruding outward are formed on the outer periphery of the first clutch plate 41. Each of these engaging projections meshes with a notch 22 a formed in the cylindrical portion 22 of the clutch housing 2. Therefore, the first clutch plate 41 is movable in the axial direction with respect to the clutch housing 2 and is not relatively rotatable.

Friction facing is affixed to both surfaces of the first clutch plate 41. The friction facing of the first clutch plate 41 disposed on the outermost side in the axial direction can be frictionally engaged with the friction portion 33 of the clutch center 3.

Further, a plurality of engaging protrusions that protrude toward the inner peripheral side are formed at the inner peripheral end of the second clutch plate 42. These engaging protrusions are engaged with engaging grooves 32 a formed in the cylindrical portion 32 of the clutch center 3. Therefore, the second clutch plate 42 is movable in the axial direction with respect to the clutch center 3 and is not relatively rotatable.

[Pressure plate 5]
The pressure plate 5 has a main body 51 and a plurality of protrusions 52. For example, the pressure plate 5 has four protrusions 52. The main body 51 is an annular member.

The main body 51 is attached to the boss 31 a of the disc 31 of the clutch center 3. The main body 51 is movable in the axial direction with respect to the boss 31a. The main body 51 has an engaging protrusion 51b. The engagement protrusion 51 b engages with the engagement groove 32 a of the cylindrical portion 32 of the clutch center 3.

The main body 51 has an annular pressing portion 51a. The pressing part 51 a is formed on the outer peripheral part of the main body part 51. The pressing portion 51a presses the clutch portion 4 toward the outer side in the axial direction. The pressing portion 51a is capable of frictional facing and frictional engagement with the first clutch plate 41 disposed on the innermost side in the axial direction.

The pressing portion 51a is disposed so as to face the friction portion 33 of the clutch center 3 with the

clutch plates

41 and 42 interposed therebetween. The first and second

clutch plates

41 and 42 are sandwiched between the pressing portion 51a and the friction portion 33 with a predetermined pressing force, so that the clutch is turned on (power transmission state).

Each protrusion 52 is formed so as to extend outward from the main body 51 in the axial direction. Each protrusion 52 is formed on the inner periphery of the main body 51. The protrusions 52 are arranged at equal intervals in the circumferential direction. A screw hole 52 a extending in the axial direction is formed at the center of each protrusion 52. The base 52b of each protrusion 52 is formed so as to be thicker toward the main body 51 side. The axially inner portion of the root portion 52 b of the protrusion 52 is thicker than the inner diameter of the first coil spring 7.

[Release member 6]
The release member 6 has a main body 61 having a circular outer shape. A hole 6 a is formed at the center of the main body 61. A release mechanism (not shown) is connected to the hole 6a. As shown in FIG. 3, a plurality of first recesses 61 a are formed on the outer periphery of the main body 61 so as to be recessed outward in the axial direction. For example, four first recesses 61a are formed.

The first recesses 61a are arranged at equal intervals in the circumferential direction. Each of the first recesses 61 a is disposed so as to face the second recess 31 c formed in the disc portion 31 of the clutch center 3. The first recess 61a accommodates the first end (the axially outer end) of the first coil spring 7.

As shown in FIG. 2, a plurality of through holes 61 b are formed in the outer peripheral portion of the main body 61 of the release member 6. For example, four through holes 61b are formed. Each through-hole 61b is arrange | positioned at equal intervals in the circumferential direction. In the circumferential direction, one through hole 61b is disposed between two adjacent first recesses 61a. In other words, the first recesses 61 a and the through holes 61 b are alternately formed on the outer peripheral portion of the main body 61 in the circumferential direction.

Each bolt 15 is screwed into each screw hole 52a of each protrusion 52 of the pressure plate 5 through each through hole 61b. As a result, the release member 6 is fixed to the pressure plate 5 via the protrusions 52. Each washer 16 is interposed between the head of each bolt 15 and the outer periphery of the release member 6.

[First coil spring 7]
As shown in FIG. 3, each first coil spring 7 is disposed between the clutch center 3 and the release member 6. Each first coil spring 7 is mounted in a compressed state. Specifically, the first end (the axially outer end) of each first coil spring 7 is accommodated in the first recess 61 a of the release member 6. And the 2nd edge part (axial direction inner side edge part) of each 1st coil spring 7 is accommodated in the 2nd recessed part 31c of the clutch center 3. As shown in FIG.

As shown in FIG. 1, each first coil spring 7 is disposed between two adjacent protrusions 52. That is, the first coil springs 7 and the protrusions 52 are alternately arranged in the circumferential direction. Each first coil spring 7 is closer to one of the protrusions 52 than the center between the two adjacent protrusions 52 in the circumferential direction.

[Operation]
As shown in FIGS. 2 and 3, the release member 6 and the clutch center 3 are urged away from each other by the first coil spring 7 when the clutch release operation is not performed. As a result, the release member 6 moves outward in the axial direction, and the pressure plate 5 fixed to the release member 6 also moves outward in the axial direction. As a result, the

clutch plates

41 and 42 of the clutch portion 4 are sandwiched between the friction portion 33 of the clutch center 3 and the pressing portion 51 a of the pressure plate 5.

In such a state, torque input from the crankshaft of the engine via the input gear 10 and the second coil spring 11 is transmitted to the first and second

clutch plates

41 and 42 via the clutch housing 2, and Then, it is transmitted to the clutch center 3 and the pressure plate 5. In addition, since the engagement protrusion 51b of the pressure plate 5 is engaged with the engagement groove 32a of the clutch center 3, the torque transmitted to the pressure plate 5 is efficiently transmitted to the clutch center 3.

The torque transmitted to the clutch center 3 as described above is transmitted to an input shaft (not shown) of the transmission that engages with the spline hole 31b of the clutch center 3.

On the other hand, when the rider grips the clutch lever, the operating force is transmitted to the release mechanism via the clutch wire or the like. With this release mechanism, the release member 6 moves inward in the axial direction against the urging force of the first coil spring 7. When the release member 6 moves inward in the axial direction, the pressure plate 5 fixed to the release member 6 also moves inward in the axial direction. For this reason, the pressing force to the clutch part 4 of the pressure plate 5 is cancelled | released, and the clutch part 4 will be in an OFF state. In this clutch-off state, the rotation from the clutch housing 2 is not transmitted to the clutch center 3.

[Characteristic]
The motorcycle clutch device 1 according to the present embodiment has the following characteristics.

(1) The first coil spring 7 is disposed between two adjacent protrusions 52. That is, the first coil spring 7 is not disposed so as to surround the periphery of the protrusion 52 of the pressure plate 5. Therefore, the protrusion 52 is not restricted by the shape of the first coil spring 7. For this reason, for example, the thickness of the protrusion 52 can be made larger than the inner diameter of the first coil spring 7. As a result, the protruding portion 52 can be made to have a more rigid shape, and the protruding portion 52 can be prevented from being deformed from the base.

(2) The protruding portion 52 is formed so as to become thicker at the base portion 52b toward the main body portion 51 side. For this reason, the stress concentration between the protrusion 52 and the main body 51 can be dispersed. As a result, it can prevent more reliably that the projection part 52 deform | transforms from a root.

(3) The release member 6 has a first recess 61 a for accommodating the first end of the first coil spring 7. For this reason, the first coil spring 7 can be stably held.

(4) The clutch center 3 has a second recess 31 c for accommodating the second end of the first coil spring 7. For this reason, the first coil spring 7 can be stably held.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning of this invention.

Modification 1
In the said embodiment, although the pressure plate 5 had the projection part 52, it is not specifically limited to this. For example, as shown in FIG. 4, the release member 6 may have a protrusion 62 instead of the pressure plate 5 having a protrusion. That is, the release member 6 has a main body 61 and a plurality of protrusions 62. For example, the release member 6 has four protrusions 62.

Each projection 62 extends from the main body 61 toward the inside in the axial direction. Each protrusion 62 is formed on the outer periphery of the main body 61. Further, the protrusions 62 are arranged at equal intervals in the circumferential direction. A screw hole 62 a extending in the axial direction is formed at the center of each protrusion 62. The base portion 62b of each protrusion 62 is formed to be thicker toward the main body 61 side.

The pressure plate 5 has a plurality of through holes 51 c formed in the inner periphery of the main body 51. For example, four through holes 51c are formed. Each through-hole 51c is formed at equal intervals in the circumferential direction.

The bolt 15 is screwed into the screw hole 62a of the protrusion 62 of the release member 6 through the through hole 51c. As a result, the release member 6 is fixed to the pressure plate 5 via the protrusion 62. A washer 16 is interposed between the head of the bolt 15 and the inner periphery of the pressure plate 5.

Modification 2
As shown in FIG. 5, the release member 6 has a plurality of first protrusions 62 protruding inward in the axial direction. For example, the release member 6 has four first protrusions 62. Each first convex portion 62 is formed on the outer peripheral portion of the main body portion 61. Specifically, each 1st convex part 62 is formed in each 1st recessed part 61a. Each first convex portion 62 has a cylindrical shape and is inserted into the inner peripheral portion of the first end portion of the first coil spring 7. Preferably, each first convex portion 62 is fitted to the inner peripheral portion of the first end portion of the first coil spring 7.

The clutch center 3 has a plurality of second convex portions 34 that protrude from the disc portion 31 outward in the axial direction. For example, the clutch center 3 has four second convex portions 34. Each second convex portion 34 is formed on the outer peripheral portion of the disc portion 31.

Specifically, each second convex portion 34 is formed in the second concave portion 31c. Each 2nd convex part 34 is arrange | positioned so that each 1st convex part 62 mentioned above may be opposed. Each second convex portion 34 has a cylindrical shape and is inserted into the inner peripheral portion of the second end portion of the first coil spring 7. Preferably, each second convex portion 34 is fitted to the inner peripheral portion of the second end portion of the first coil spring 7.

According to the above configuration, the first coil spring 7 can be stably held. In addition, when forming the 1st convex part 62 and the 2nd convex part 34 like the modification 2, it is not necessary to form the 1st recessed part 61a and the 2nd recessed part 31c.

Modification 3
In the embodiment described above, the root portion 52b of the protrusion 52 is made thicker toward the main body 51 in order to prevent the protrusion 52 from being deformed, but this is not a limitation. For example, the protrusion 52 may be thickened as much as it does not deform from the root, or the reinforcing portion may be provided in the root 52b. Examples of the reinforcing portion include a rib that connects the projection 52 and the main body 51.

Modification 4
The shapes and structures of the clutch housing 2, the clutch center 3, the pressure plate 5, and the release member 6 of the above embodiment are merely examples, and various modifications are possible. Moreover, the number of the protrusion parts 52 of the pressure plate 5, the number of the 1st coil springs 7, etc. are examples, and are not specifically limited to the number of the said embodiment.

DESCRIPTION OF SYMBOLS 1 Clutch device 2 Motorcycle housing 3 Clutch center 33 Friction part 4 Clutch part 41 1st clutch plate 42 2nd clutch plate 5 Pressure plate 51 Main body part 52 Projection part 51a Press part 6 Release member 61 Main body part 62 Projection part 7 1st coil spring

Claims

A clutch device for a motorcycle that transmits power from an input side member to an output side member and interrupts power transmission by operation of a release mechanism,
A clutch housing coupled to one of the input side member and the output side member;
A clutch center coupled to the other of the input side member and the output side member and having a friction portion;
A clutch part having a clutch plate for transmitting and shutting off the power between the clutch housing and the clutch center;
A pressure part having a plurality of protrusions protruding in the axial direction, and a pressing part for sandwiching the clutch plate with the friction part;
A release member that is fixed to the pressure plate via the protrusion and to which the release mechanism is attached;
A coil spring that extends between the clutch center and the release member between the protrusions and biases the pressure plate so that the friction part and the pressing part approach each other;
A motorcycle clutch device.
The pressure plate further includes a main body portion,
The protrusion extends in the axial direction from the main body, and becomes thicker toward the main body at the base portion.
The motorcycle clutch device according to claim 1.
The pressure plate further includes a main body portion,
The protrusion extends in the axial direction from the main body,
The protrusion has a reinforcing part that connects the main body and the protrusion.
The motorcycle clutch device according to claim 1.
A clutch device for a motorcycle that transmits power from an input side member to an output side member and interrupts power transmission by operation of a release mechanism,
A clutch housing coupled to one of the input side member and the output side member;
A clutch center coupled to the other of the input side member and the output side member and having a friction portion;
A clutch part having a clutch plate for transmitting and shutting off the power between the clutch housing and the clutch center;
A pressure plate having a pressing portion for sandwiching the clutch plate with the friction portion;
A release member having a plurality of protrusions protruding in the axial direction, fixed to the pressure plate via the protrusions, and to which the release mechanism is attached;
A coil spring that extends between the clutch center and the release member between the protrusions and biases the pressure plate so that the friction part and the pressing part approach each other;
A motorcycle clutch device.
The release member further includes a main body portion,
The protrusion extends in the axial direction from the main body, and becomes thicker toward the main body at the base portion.
The motorcycle clutch device according to claim 4.
The release member further includes a main body portion,
The protrusion extends in the axial direction from the main body,
The protrusion has a reinforcing part that connects the main body and the protrusion.
The motorcycle clutch device according to claim 4.
The release member has a first recess for receiving a first end of the coil spring.
The clutch device for a motorcycle according to any one of claims 1 to 6.
The clutch center has a second recess for receiving the second end of the coil spring.
The motorcycle clutch device according to any one of claims 1 to 7.
The release member has a first protrusion that is inserted into the inner peripheral portion of the first end of the coil spring,
The clutch center has a second convex portion inserted into an inner peripheral portion of a second end portion of the coil spring.
The motorcycle clutch device according to any one of claims 1 to 8.