WO2018061640A1

WO2018061640A1 - Clutch device

Info

Publication number: WO2018061640A1
Application number: PCT/JP2017/031767
Authority: WO
Inventors: 未紗樹美濃羽; 亮一今井
Original assignee: 株式会社エクセディ
Priority date: 2016-09-30
Filing date: 2017-09-04
Publication date: 2018-04-05
Also published as: JP2018054091A; JP6636408B2

Abstract

The present invention ensures sufficient torque transmission capacity by providing a plurality of clutch parts, while also simplifying the configuration thereof. This clutch device is equipped with a clutch housing (1), a clutch center (21), a plate (22), a first cone clutch (C1), a second cone clutch (C2), and engaging portions (21e, 22e). The clutch center (21) is connected to an output-side member. The pressure plate (22) is disposed in line with the clutch center (21) in the axial direction. The first cone clutch (C1) transmits power between the clutch housing (1) and the clutch center (21). The second cone clutch (C1) transmits power between the clutch housing (1) and the pressure plate (22). The engaging portions (21e, 22e) engage the clutch center (21) with the pressure plate (22) in a non-rotatable manner.

Description

Clutch device

The present invention relates to a clutch device, and more particularly to a clutch device having two clutch portions.

An example of a clutch device is a motorcycle clutch device. A motorcycle clutch device generally includes a clutch housing, a rotating body, and a clutch portion. The clutch housing is connected to the crankshaft side of the engine, and the rotating body is connected to the transmission side. A clutch part transmits or interrupts | blocks a torque by carrying out friction engagement between a clutch housing and a rotary body, or canceling | releases friction engagement. The clutch portion has a plurality of drive plates and a plurality of driven plates in order to improve the frictional force.

JP 2013-185675 A

As shown in Patent Document 1, a conventional motorcycle clutch device improves torque transmission capacity by increasing drive plates and driven plates. Here, in order to further increase the torque transmission capacity, a plurality of clutch portions may be provided. However, a structure for connecting each clutch portion to the output side member is required, which complicates the configuration and causes an increase in cost.

An object of the present invention is to provide a plurality of clutch portions to ensure a sufficient torque transmission capacity and to simplify the configuration.

(1) A clutch device according to the present invention is a device disposed between an input side member to which power is input and an output side member to which power is output. The clutch device includes a clutch housing, a first output member, a second output member, a first clutch portion, a second clutch portion, and an engagement portion. The clutch housing can be connected to an input side member. The first output member can be connected to an output side member. The second output member is arranged side by side with the first output member in the axial direction. The first clutch portion transmits and interrupts power between the clutch housing and the first output member. The second clutch portion transmits and interrupts power between the clutch housing and the second output member. The engaging portion engages the first output member and the second output member in a non-rotatable manner.

In this apparatus, torque input to the clutch housing is transmitted to the first output member via the first clutch portion. Since the first output member can be connected to the output side member, the torque transmitted to the first output member is transmitted to the output side member.

On the other hand, the torque input to the clutch housing is transmitted to the second output member via the second clutch portion. Here, since the first output member and the second output member are non-rotatably engaged by the engaging portion, the torque transmitted to the second output member is transmitted to the first output member via the engaging portion. And transmitted from the first output member to the output side member.

Here, since the torque is transmitted by the first clutch portion and the second clutch portion, a sufficient torque transmission capacity can be secured. In addition, since the first output member and the second output member are non-rotatably engaged by the engaging portion, a structure for connecting the second output member to the output side member becomes unnecessary, and the configuration is It will be easy.

(2) Preferably, the first clutch part is provided between the inner peripheral part of the clutch housing and the outer peripheral part of the first output member. The second clutch portion is provided between the inner peripheral portion of the clutch housing and the outer peripheral portion of the second output member.

Here, since the first and second clutch portions are disposed between the inner peripheral portion of the clutch housing and the outer peripheral portions of the first and second output members, the entire apparatus can be made compact.

(3) Preferably, the first clutch portion has a tapered first pressure receiving surface and a first friction surface pressed against the first pressure receiving surface. The second clutch part has a tapered second pressure receiving surface and a second friction surface pressed against the second pressure receiving surface.

Here, since the cone clutch is used as the clutch portion, a sufficient frictional force, that is, a clutch torque transmission capacity can be secured by the wedge force. Further, the cost can be reduced as compared with the conventional multi-plate clutch.

Here, in the cone clutch, in order to secure a sufficient torque capacity with one friction surface, it is necessary to reduce the taper angles of the pressure receiving surface and the friction surface. However, if the taper angle is too small, the wedge force becomes excessive, the friction surface sticks to the pressure receiving surface, and the clutch is difficult to disconnect.

On the other hand, in order to improve the clutch disengagement, it is necessary to increase the taper angle. However, if the taper angle is increased, the required torque capacity cannot be ensured, so that it is necessary to increase the pressing load of the friction surface against the pressure receiving surface. When the pressing load is increased in this way, the operation force necessary for disengaging the clutch, that is, the operation load of the clutch lever is increased and the operation becomes difficult.

However, in the present invention, since two friction surfaces are provided by two cone clutches, a necessary torque capacity can be ensured without increasing the pressing load.

(4) Preferably, the first and second clutch portions rotate together with the clutch housing and have clutch shoes having first and second pressure receiving surfaces on the inner peripheral surface.

Here, since the clutch shoe is provided, it is possible to cope with a wide range of specifications by changing the specifications of each pressure receiving surface of the clutch shoe.

(5) Preferably, the clutch housing has a disk part and a cylindrical part formed extending in the axial direction from the outer peripheral part of the disk part and having a housing side engaging part. The clutch shoe has a shoe side engaging portion that engages with the housing side engaging portion on the outer peripheral portion.

Here, the clutch housing and the clutch shoe are formed as separate bodies and connected via respective engaging portions. For this reason, manufacture of each member becomes easy.

(6) Preferably, the first output member is a plate-like member having a first friction portion provided with a first friction surface on the outer peripheral portion. The second output member is a plate-like member having a second friction portion having a second friction surface provided on the outer peripheral portion.

Here, friction portions constituting two cone clutches are formed on the outer peripheral portions of the first and second output members. This simplifies the configuration.

(7) Preferably, the engaging portion has a plurality of claws and a plurality of holes, and the claws are formed on one of the first and second output members. The hole is formed in the other of the first and second output members and engages with the claw. In this case, the configuration of the engaging portion is simplified.

(8) Preferably, a hub that can be connected to the output side member together with the first output member is further provided, and the second output member is not connected to the hub.

Here, since the second output member is engaged with the first output member by the engaging portion, it is not necessary to provide the second output member with a structure for transmitting torque to the hub, and the structure is simplified. .

(9) Preferably, the first pressure receiving surface and the first friction surface are tapered so that the diameter decreases toward the first side in the axial direction. Further, the second pressure receiving surface and the second friction surface are tapered so that the diameter decreases toward the second side in the axial direction.

Here, the space occupied by the first and second clutch portions in the axial direction can be made compact.

In the present invention as described above, a plurality of clutch portions can be provided to ensure a sufficient torque transmission capacity, and the configuration of the connecting portion with the output side member can be simplified.

1 is a cross-sectional view of a motorcycle clutch device according to an embodiment of the present invention. FIG. 2 is a partial front view of the apparatus of FIG. 1. FIG. 2 is a partial cross-sectional view of the apparatus of FIG. FIG. 2 is a partial cross-sectional view of the apparatus of FIG.

FIG. 1 is a cross-sectional view of a motorcycle clutch device as an example of a clutch device, and FIG. 2 is a front partial view of the motorcycle clutch device. In the following description, “axial direction” indicates the left-right direction in FIG. 1, “axially inner” (first side) indicates the left side of FIG. 1, and “axially outer” (second side). Indicates the right side of FIG.

[overall structure]
The motorcycle clutch device transmits power from the crankshaft of the engine to a transmission and interrupts power transmission by operating a release mechanism. The clutch device includes a clutch housing 1, a clutch shoe 2, an output member 3, and a clutch control unit 4.

[Clutch housing 1]
The clutch housing 1 has a disc portion 6 and a cylindrical portion 7 and is connected to an input gear 8. The input gear 8 meshes with a drive gear (not shown) fixed to the crankshaft on the engine side, and power is input from the engine.

In the disc portion 6, a hole 6a into which a transmission shaft is inserted is formed in the center portion. Further, a plurality of protrusions 6b protruding inward in the axial direction are formed at a predetermined interval in the circumferential direction at the radial intermediate portion of the disk portion 6. An elastic member 10 is mounted around the protrusion 6 b, and the protrusion 6 b and the elastic member 10 are inserted into a hole 8 a formed in the input gear 8.

Further, a spring support portion 6 c is formed at the radial intermediate portion of the disc portion 6. The spring 12 is supported by the spring support portion 6 c and the support plate 11 fixed to the side surface of the input gear 8. The spring 12 elastically connects the clutch housing 1 and the input gear 8 in the rotational direction. The support plate 11 is fixed to the tip of the protrusion 6b of the clutch housing 1 by a bolt 13 and a nut 14. A disc spring 15 is disposed on the inner peripheral portion of the support plate 11 between the side surface of the input gear 8.

The cylindrical portion 7 is formed so as to extend outward from the outer peripheral edge of the disc portion 6 in the axial direction. A plurality of notches 7a (housing side engaging portions) extending in the axial direction and opening outward in the axial direction are formed in the cylindrical portion 7 at predetermined intervals in the circumferential direction.

[Clutch shoe 2]
The clutch shoe 2 is an annular member and is disposed along the inner peripheral surface of the cylindrical portion 7 of the clutch housing 1. As shown in FIGS. 2 and 3, the clutch shoe 2 has a plurality of claws 2 a (shoe side engaging portions), a first pressure receiving surface 2 b, and a second pressure receiving surface 2 c.

The plurality of claws 2a are formed on the outer peripheral surface of the clutch shoe 2 so as to protrude further to the outer peripheral side. The plurality of claws 2 a are arranged at a predetermined interval in the circumferential direction, and each claw 2 a is engaged with a notch 7 a formed in the cylindrical portion 7 of the clutch housing 1. Thus, the clutch shoe 2 is movable in the axial direction with respect to the clutch housing 1 and is not rotatable.

The first pressure receiving surface 2b is formed in the outer half of the axial direction on the inner peripheral surface of the clutch shoe 2. The first pressure receiving surface 2b is formed in a tapered shape whose diameter decreases from the axially outer end surface of the clutch shoe 2 toward the axially inner side.

The second pressure receiving surface 2c is formed in the inner half surface of the clutch shoe 2 in the half region on the inner side in the axial direction. The second pressure receiving surface 2c is formed in a tapered shape whose diameter decreases from the axially inner end surface of the clutch shoe 2 toward the axially outer side.

[Output member 3]
The output member 3 is housed in the inner peripheral portion of the clutch housing 1, and includes a clutch center 21 (first output member), a pressure plate 22 (second output member), and a hub 23. The clutch center 21 and the pressure plate 22 are both formed by sheet metal processing of an iron plate material.

As shown in FIG. 3, the clutch center 21 has a disc part 21 a and a friction part 21 b (first friction part). A spline hole 21c is formed in the central portion of the disc portion 21a, and the spline engagement is possible with the transmission shaft. Moreover, four through-holes 21d and four claws 21e (a part of the engaging portion) are formed at a predetermined interval in the circumferential direction in the radial intermediate portion of the disc portion 21a. The four claws 21e are formed by cutting and raising a part of the disc portion 21a toward the pressure plate 22 side. The friction part 21b is formed by bending the outer peripheral part of the disk part 21a outward in the axial direction. The friction part 21b faces the first pressure receiving surface 2b of the clutch shoe 2, and is formed in a tapered shape having the same inclination as the first pressure receiving surface 2b. An annular first friction material 25 is fixed to the outer peripheral surface of the friction portion 21b, and the surface of the first friction material 25 is a first friction surface 25a.

The pressure plate 22 is disposed on the inner side in the axial direction of the clutch center 21 so as to be opposed to the clutch center 21 and movable in the axial direction. The pressure plate 22 has a disc part 22a and a friction part 22b (second friction part). Four through holes 22d are formed at predetermined intervals in the circumferential direction on the inner peripheral portion of the disc portion 22a. In addition, a hole 22e (a part of the engaging portion) that is long in the circumferential direction is formed in the intermediate portion in the radial direction of the disc portion 22a so as to correspond to the claw 21e of the clutch center 21. A claw 21e is engaged with the hole 22e, whereby the pressure plate 22 rotates in synchronization with the clutch center 21. The friction portion 22b is formed by bending the outer peripheral portion of the disc portion 22a inward in the axial direction. The friction part 22b faces the second pressure receiving surface 2c of the clutch shoe 2, and is formed in a tapered shape having the same inclination as the second pressure receiving surface 2c. An annular second friction material 26 is fixed to the outer peripheral surface of the friction portion 22b, and the surface of the second friction material 26 is a second friction surface 26a.

The first and

second friction materials

25 and 26 are made of the same material, and here, a friction material for a four-wheeled vehicle used for a passenger car or the like is used.

The hub 23 is an annular member, and is disposed on the inner peripheral portion of the pressure plate 22 so as to abut on the side surface on the inner side in the axial direction of the inner peripheral portion of the clutch center 21. As shown in FIG. 3, a spline hole 23 a is formed in the inner peripheral portion of the hub 23. The spline hole 23a can be engaged with a transmission shaft. Note that the inner peripheral portion of the pressure plate 22 and the hub 23 are not connected, and the pressure plate 22 can freely move in the axial direction with respect to the hub 23.

As described above, the clutch center 21 can be connected to the transmission shaft through the spline hole 21c. Further, the pressure plate 22 is engaged with each other by a claw 21 e of the clutch center 21 and a hole 22 e of the pressure plate 22. Therefore, the clutch center 21 and the pressure plate 22 rotate in synchronization, and the torque transmitted to them is transmitted to the transmission shaft.

A thrust plate 27 is disposed between the side surface of the hub 23 and the side surface of the inner peripheral portion of the clutch housing 1 as shown in FIG.

[First and second cone clutches C1, C2]
In the above configuration, the first cone is formed by the first pressure receiving surface 2b of the clutch shoe 2 and the first friction material 25 having the friction portion 21b and the first friction surface 25a formed on the outer peripheral portion of the clutch center 21. A clutch C1 (first clutch portion) is configured. Further, the second cone clutch C2 (the second clutch member C2) is formed by the second pressure receiving surface 2c of the clutch shoe 2 and the second friction material 26 having the friction portion 22b and the second friction surface 26a formed on the outer peripheral portion of the pressure plate 22. Clutch portion).

[Clutch control unit 4]
The clutch control unit 4 is disposed outside the clutch center 21 in the axial direction, and includes a release member 30 and four coil springs 40.

The release member 30 is moved in the axial direction by a release mechanism (not shown). As shown in FIG. 4, the release member 30 has an annular main body 31 and four protrusions 32. The annular main body 31 can be penetrated by a rod of a release mechanism or the like through an inner peripheral portion. The protrusion 32 is formed integrally with the main body 31 and protrudes inward in the axial direction from the main body 31. The protrusion 32 penetrates the hole 21d of the clutch center 21 toward the pressure plate 22 side. The protrusion 32 has a screw hole 32a having a predetermined depth at the tip end on the inner side in the axial direction. The tip end surface of the protrusion 32 is in contact with the axially outer side surface of the pressure plate 22. A bolt 34 extending from the axially inner side surface of the pressure plate 22 to the axially outer side through the hole 22 d is screwed into the screw hole 32 a of the protrusion 32. Thereby, the release member 30 is fixed to the pressure plate 22.

The coil spring 40 is disposed so as to surround the outer periphery of the protrusion 32 of the release member 30 as shown in FIGS. That is, the protrusion 32 passes through the inner peripheral portion of the coil spring 40. One end of the coil spring 40 is in contact with the main body 31 of the release member 30, and the other end is in contact with the clutch center 21.
Here, the coil spring 40 is mounted between the release member 30 and the clutch center 21 in a compressed state in a neutral state where no release operation is performed. For this reason, the coil spring 40 urges the clutch center 21 in the axial direction and urges the pressure plate 22 in the axial direction.

[Operation]
When the release operation is not performed, the release member 30 and the clutch center 21 are urged by the coil spring 40 in a direction away from each other. Since the release member 30 is supported by the release mechanism, the clutch center 21 is urged inward in the axial direction by the coil spring 40, and the pressure plate 22 fixed to the release member 30 is urged in the axially outer side. . As a result, the first friction surface 25a is pressed against the first pressure receiving surface 2b, and the second friction surface 26a is pressed against the second pressure receiving surface 2c. That is, the first cone clutch C1 and the second cone clutch C2 are turned on (power transmission state).

In such a state, torque input from the crankshaft of the engine via the input gear 8 or the like is transmitted from the clutch housing 1 to the clutch center 21 and the pressure plate 22 via the first and second cone clutches C1 and C2. Is done.

The torque transmitted to the clutch center 21 as described above is transmitted to the transmission shaft through the spline hole 21c of the clutch center 21. The torque transmitted to the pressure plate 22 is transmitted to the clutch center 21 via an engagement portion formed by a hole 22e of the pressure plate 22 and a claw 21e of the clutch center 21, and the shaft of the transmission is transmitted via the clutch center 21. Is transmitted to.

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 30 is moved inward in the axial direction against the urging force of the coil spring 40. When the release member 30 is moved inward in the axial direction, the pressure plate 22 fixed to the release member 30 also moves inward in the axial direction. For this reason, the pressing force of the pressure plate 22 on the clutch shoe 2 (second pressure receiving surface 2c) is released. Further, since the clutch center 21 is restricted from moving inward in the axial direction by the hub 23, when the pressing force of the pressure plate 22 on the clutch shoe 2 is released, the first pressure receiving surface 2b of the clutch shoe 2 and the first pressure receiving surface 2b are arranged. The pressing force between the first friction surface 25a is also released.

As described above, the first cone clutch C1 and the second cone clutch C2 are clutch-off (release of power transmission: cutoff). In this clutch-off state, rotation from the clutch housing 1 is not transmitted to the clutch center 21 and the pressure plate 22.

[Other Embodiments]
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.

(A) In the above embodiment, the first cone clutch C1 is configured using a part of the clutch center 21 and the second cone clutch C2 is configured using a part of the pressure plate 22. The pressure plate and the cone clutch may be configured separately.

(B) In the above-described embodiment, the clutch housing 1 and the clutch shoe 2 are configured separately. However, the first and second pressure receiving surfaces are formed on a part of the clutch housing by devising the configuration of the clutch housing. Also good.

(C) In the above-described embodiment, the first and second

pressure receiving surfaces

2b and 2c are formed on one clutch shoe 2, but two clutch shoes may be provided, and the pressure receiving surfaces may be formed respectively.

(D) The shapes and structures of the clutch housing 1, the clutch center 21, the pressure plate 22, and the release member 30 of the above embodiment are merely examples, and various modifications are possible. Moreover, the number of the protrusion parts 32 of the clutch center 21, the number of the coil springs 40, etc. are examples, and are not limited to the number of the said embodiment especially.

(E) In the above embodiment, the example of the cone clutch is shown as the clutch portion, but the present invention can be similarly applied to other types of clutches.

(F) In the above-described embodiment, the engaging portion is constituted by the claw 21e of the clutch center 21 and the hole 22e of the pressure plate 22. However, a hole is formed in the clutch center 21 and a claw is formed in the pressure plate 22. You may comprise a joint part. Moreover, an engaging part is not limited to a nail | claw and a hole.

(G) In the above embodiment, the motorcycle clutch device is described as an example of the clutch device. However, the present invention can also be applied to other vehicle or power machine clutch devices in the same manner as the present invention.

In the clutch device of the present invention, a plurality of clutch portions can be provided to ensure a sufficient torque transmission capacity, and the configuration of the connecting portion with the output side member can be simplified.

1 Clutch housing 2 Clutch shoe 2a Claw (Shoe side engaging part)
2b 1st pressure receiving surface 2c 2nd pressure receiving surface 3 Output member 6 Disk part 7 Cylindrical part 7a Notch (housing side engaging part)
21 Clutch center (first output member)
21e Claw (part of engaging part)
22 Pressure plate (second output member)
22e hole (part of the engaging part)
23 Hub 25a First friction surface 26a Second friction surface C1 First cone clutch (first clutch portion)
C2 2nd cone clutch (2nd clutch part)

Claims

A clutch device disposed between an input-side member to which power is input and an output-side member from which power is output;
A clutch housing connectable to the input side member;
A first output member connectable to the output side member;
A second output member arranged side by side in the axial direction with the first output member;
A first clutch portion for transmitting and interrupting power between the clutch housing and the first output member;
A second clutch portion for transmitting and interrupting power between the clutch housing and the second output member;
An engaging portion for non-rotatably engaging the first output member and the second output member;
A clutch device comprising:
The first clutch portion is provided between an inner peripheral portion of the clutch housing and an outer peripheral portion of the first output member;
The second clutch portion is provided between an inner peripheral portion of the clutch housing and an outer peripheral portion of the second output member;
The clutch device according to claim 1.
The first clutch portion has a tapered first pressure receiving surface and a first friction surface pressed against the first pressure receiving surface,
The second clutch portion has a tapered second pressure receiving surface and a second friction surface pressed against the second pressure receiving surface.
The clutch device according to claim 2.
The clutch device according to claim 3, wherein the first and second clutch portions have a clutch shoe that rotates together with the clutch housing and has the first and second pressure receiving surfaces on an inner peripheral surface thereof.
The clutch housing includes a disk part, and a cylindrical part formed extending in the axial direction from the outer peripheral part of the disk part and having a housing side engaging part,
The clutch shoe has a shoe-side engagement portion that engages with the housing-side engagement portion on an outer peripheral portion.
The clutch device according to claim 4.
The first output member is a plate-like member having a first friction part in which the first friction surface is provided on an outer peripheral part,
The second output member is a plate-like member having a second friction part in which the second friction surface is provided on an outer peripheral part.
The clutch device according to any one of claims 3 to 5.
The engaging portion is
A plurality of claws formed on one of the first and second output members;
A plurality of holes formed on the other of the first and second output members and engaged with the claws;
Having
The clutch device according to any one of claims 1 to 6.
A hub that can be connected to the output side member together with the first output member;
The second output member is not connected to the hub;
The clutch device according to any one of claims 1 to 7.
The first pressure receiving surface and the first friction surface are tapered so that the diameter decreases toward the first side in the axial direction,
The second pressure receiving surface and the second friction surface are tapered so that the diameter decreases toward the second side in the axial direction.
The clutch device according to claim 3.