JP4256909B2 - Clutch device - Google Patents

Description

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

  In general, in a motorcycle such as a motorcycle or a buggy, a multi-plate clutch device is used to transmit or block power from an engine to a transmission. The multi-plate clutch device includes a clutch housing coupled to the crankshaft side of the engine, an output-side rotating body coupled to the transmission side, a clutch unit for transmitting and shutting power between them, and a clutch And a pressure plate for pressing the part. In the clutch portion, a first clutch plate that engages with the clutch housing and a second clutch plate that engages with the output side rotating body are alternately arranged.

Then, these clutch plates are brought into pressure contact with each other by a diaphragm spring via a pressure plate, whereby the rotation of the crankshaft is transmitted to the transmission side. Further, when the clutch is turned off (rotation transmission is cut off), the release mechanism is actuated by the operator holding the clutch lever, and the release mechanism depresses the diaphragm spring against the clutch plate. Power transmission between the two clutch plates is cut off (see Patent Document 1).
Japanese Utility Model Publication No. 53-55051

  Further, the present applicant has developed a clutch device of a type different from the above configuration as shown in FIG. The clutch device includes a clutch housing 101 to which power is transmitted from the engine, an output-side rotating body 102 coupled to a transmission-side member, and a clutch unit 103 for transmitting / cutting power between them, A pressing rotator 104, an annular pressing member 105, and a disk-shaped member 106 are provided. The pressing rotator 104 is disposed on one side of the clutch portion 103, and transmits power between the clutch housing 101 and the output-side rotator 102. Further, the pressing rotator 104 has a plurality of projecting portions 104a projecting toward the disc-like member 106 side. The pressing member 105 is disposed on the outer peripheral side of the plurality of projecting portions 104 a and presses the output-side rotating body 102 toward the pressing rotating body 104. The disk-shaped member 106 is fixed to the plurality of protruding portions 104 a and supports the inner peripheral portion of the pressing member 105.

  In this clutch device, the output side rotating body 102 is pressed to the left side of FIG. 3 by the pressing member 105, and the disc-like member 106 and the pressing rotary body 104 fixed to the disc-like member 106 are shown on the right side of FIG. Pressed. As a result, the clutch portion 103 is held between the pressing rotator 104 and the output-side rotator 102, and the power transmitted to the clutch housing 101 is transmitted from the clutch housing 101 to the output-side rotator 102 via the clutch portion 103. The

  Further, from this state, when the disk-like member 106 is moved to the left side in FIG. 3 against the pressing force of the pressing member 105, the pressing rotator 104 moves in a direction away from the clutch portion 103. As a result, power transmission from the clutch housing 101 to the output-side rotator 102 is interrupted.

  In the clutch device of FIG. 3, in order to prevent the pressing member 105 from interfering with the protruding portion 104a of the pressing rotating body 104, the pressing member 105 needs to be disposed on the outer peripheral side of the protruding portion 104a. That is, the inner peripheral part of the pressing member 105 cannot be extended to the inner peripheral side. On the other hand, since it is necessary to support the inner peripheral part of the pressing member 105 with the outer peripheral part of the disk-like member 106, it is necessary to extend the disk-like member 106 to the outer peripheral side of the protrusion part 104a. For this reason, the diameter of the disk-shaped member 106 becomes large.

  Thus, for example, it is conceivable to form a slit in the pressing member 105 so as to avoid the protruding portion 104a of the pressing rotating body 104. However, if such a slit is formed, the pressing force of the pressing member 105 is significantly reduced. End up. For this reason, it is necessary to increase the diameter of the pressing member 105 in order to ensure a certain pressing force.

  The subject of this invention is making it possible to make the diameter of a press member small, and preventing the fall of the pressing force to an output side rotary body.

A clutch device according to a first aspect of the present invention is a clutch device for transmitting power from an input side member to an output side member, and for interrupting power transmission by a release operation of a release mechanism. The 1st rotary body, the clutch part, the 2nd rotary body, the cyclic | annular press member, and the disk-shaped member are provided. The clutch housing is connected to one side of the input side member and the output side member, and has an opening on the first direction side in the axial direction. The disc-shaped first rotating body is provided on the inner peripheral side of the clutch housing, is connected to the other of the input side member and the output side member, and has a plurality of through holes in a radially intermediate portion . The clutch portion is disposed inside the clutch housing on the second direction side in the axial direction opposite to the first direction of the first rotating body, and transmits and blocks power between the clutch housing and the first rotating body. It has a plurality of plate members to do. The second rotating body is disposed on the second direction side of the clutch portion, and can sandwich the plate member with the first rotating body, and has a plurality of protruding portions that protrude in the first direction side in the axial direction. is doing. The annular pressing member is disposed on the first direction side of the first rotating body, the outer peripheral portion presses the first rotating body toward the second direction side, and has a plurality of through holes in the radial intermediate portion . Discoid member is disposed further first direction side of the pressing member, the inner peripheral portion supports the inner peripheral portion of the pressing member, the pressing force to the first rotary member of the pressing member by being moved by the release mechanism Is released. Each of the plurality of protrusions of the second rotating body passes through the plurality of through holes of the first rotating body and the plurality of through holes of the pressing member, and the disk-shaped member is fixed to the tip. Yes.

  In this clutch device, the first rotating body is pressed by the pressing member, the plurality of plate members of the clutch unit are held between the first rotating body and the second rotating body, and the clutch unit is turned on (power transmission state). It has become. In this state, the power of the input side member is transmitted to the clutch housing, for example, and is transmitted from the clutch housing to the clutch portion. And the motive power of a clutch part is transmitted to an output side member via a 2nd rotary body.

  On the other hand, when the disk-shaped member is moved by the release mechanism, the pressing force of the pressing member to the first rotating body is released, the clutch portion is turned off (power cut-off state), and power is transferred from the clutch housing to the second rotating body. Will not be transmitted.

Here, in order to avoid interference between the plurality of projecting portions of the second rotating body and the pressing member, a through hole through which the projecting portion passes is formed in the pressing member. For this reason, the inner diameter of the pressing member can be extended further radially inward. Therefore, the outer diameter of the disk-shaped member that supports the pressing member can be reduced. Moreover, since it is possible to avoid interference between the pressing member and the protruding portion of the second rotating body without forming a slit or the like in the pressing member, it is possible to suppress a decrease in the pressing force of the pressing member.

  In addition, when the slit is formed so as to avoid the protruding portion on the pressing member, the pressing force of the pressing member is about 50% or less when the slit or hole is not formed. When the through hole is formed, the pressing force is about 70% to 80% compared to the case where no slit or hole is formed in the pressing member. That is, in the configuration of the present invention, it is possible to suppress a decrease in pressing force as compared with a type in which a slit is formed.

  In the clutch device according to a second aspect of the present invention, in the first aspect, the through hole of the pressing member is between a radial position that presses the first rotating body of the pressing member and a radial position that contacts the disk-shaped member. Is provided.

  Here, during the release operation, the inner peripheral portion of the pressing member is pressed by the disk-shaped member, but the contact position between the pressing member and the disk-shaped member is on the inner peripheral side of the through hole. Therefore, it is possible to reduce the deflection of the entire pressing member and the contact portion during the release operation.

  In the clutch device according to the third aspect of the present invention, the through hole is circular.

  In the clutch device according to a fourth aspect based on the first aspect, the first rotating body has a friction flange capable of contacting the clutch portion on the outer peripheral portion, and the other of the input side member and the output side member on the inner peripheral portion. Has a spline hole that can be locked to.

  In the clutch device according to a fifth aspect based on the first aspect, the disk-shaped member has a first contact protrusion that supports the inner peripheral portion of the pressing member on the inner peripheral portion, and the first rotating body is And a second contact protrusion for supporting the outer peripheral portion of the pressing member.

  In this invention, the diameter of the member which supports a pressing member and a pressing member can be made small, and the press force fall of a pressing member can be suppressed.

<Overall configuration>
The clutch device shown in FIGS. 1 and 2 transmits power from the crankshaft of the engine to the transmission and interrupts power transmission by a release operation. Both the crankshaft and the transmission are omitted in FIGS. The clutch device includes a clutch housing 1, an output-side rotator 2 (first rotator), a clutch unit 3 for transmitting and interrupting power between the clutch housing 1 and the output-side rotator 2, A pressing disk member 4 (second rotating body), a diaphragm spring 5 (pressing member), and a release member 6 (disk-shaped member) are provided. In this apparatus, the power transmission is interrupted by moving the release member 6 inward in the axial direction (left side in FIG. 1) by a release operation.

<Clutch housing>
The clutch housing 1 has an opening on one side in the axial direction (right side in FIG. 1), and from the outer periphery side of the disk portion 10 to the outer side in the axial direction (right side in FIG. 1). It has the cylindrical part 11 extended. An input gear 13 is mounted on the disc portion 10 with a fixed pin 10a via a plurality of annular rubber members 12. The input gear 13 meshes with a drive gear (not shown) fixed to the crankshaft on the engine side. The rubber member 12 is provided to absorb vibration from the engine, and other types such as a coil spring may be used. A plurality of notches 11a extending in the axial direction are formed in the cylindrical portion 11 at predetermined intervals in the circumferential direction.

<Output side rotating body>
The output side rotating body 2 is disposed inside the clutch housing 1. The output-side rotator 2 is formed in a substantially disk shape, and a spline shaft 2a is formed on the outer peripheral portion. Further, the output-side rotator 2 has a spline hole 2b formed at the center, and the spline hole 2b can mesh with the input shaft of the transmission. Further, the output-side rotating body 2 is formed with a friction flange 2f on the axially inner side surface of the outer peripheral portion. In addition, a plurality of axial support protrusions 2c projecting in the axial direction are formed at predetermined intervals in the circumferential direction on the outer side surface of the output-side rotator 2 on the outer side in the axial direction. A plurality of circumferential support projections 2d protruding in the axial direction are formed at predetermined intervals in the circumferential direction on the outer peripheral side of the support projection 2c. Furthermore, six through-holes 2e are formed at equal intervals in the circumferential direction at the radial intermediate portion of the output-side rotator 2.

<Clutch part>
The clutch portion 3 is a portion for transmitting and interrupting power between the clutch housing 1 and the output-side rotator 2, and includes two first clutch plates 25 and one second clutch plate 26. have. Both of these clutch plates 25 and 26 are formed in an annular shape and are alternately arranged in the axial direction. A plurality of engaging projections projecting outward are formed on the outer periphery of the first clutch plate 25, and a plurality of notches 11 a formed in the tubular portion 11 of the clutch housing 1 are formed by the plurality of engaging projections. Is engaged so as to be axially movable. The first clutch plate 25 has friction facings on both sides. The second clutch plate 26 has a spline hole formed in an inner peripheral portion thereof, and the spline hole meshes with a spline shaft 2a formed on the outer periphery of the output side rotating body 2 so as to be movable in the axial direction.

<Pressure plate>
The pressure plate 4 is a generally annular member, and is disposed on the opposite side of the output side rotating body 2 with the clutch portion 3 interposed therebetween. A friction flange 4 a is formed on the outer side of the pressure plate 4 on the outer side in the axial direction, so that the first clutch plate 25 of the clutch portion 3 can be pressed. Further, six protruding portions 41 protruding outward in the axial direction are formed at equal intervals in the circumferential direction on the inner peripheral portion of the pressure plate 4, and the protruding portions 41 are formed in the through holes 2 e of the output side rotating body 2. It penetrates. Further, a spline hole 42 is formed on the inner peripheral side of the friction flange 4 a of the pressure plate 4, and this spline hole 42 is engaged with a spline shaft 2 a formed on the outer peripheral portion of the output side rotating body 2. Yes.

<Diaphragm spring>
The diaphragm spring 5 is a generally annular member, and is disposed on the outer side in the axial direction of the output side rotating body 2. Diaphragm spring 5 has six engaging projections 51 (see FIG. 2) projecting to the outer periphery at equal intervals in the circumferential direction, and a radially intermediate portion (specifically, output side rotation) Six circular through holes 52 are formed at equal intervals in the circumferential direction (between the portion in contact with the body 2 and the portion in contact with the release member 6). The engaging protrusion 51 is disposed between the two adjacent circumferential support protrusions 2 d, thereby preventing the diaphragm spring 5 from rotating relative to the output side rotating body 2. Further, the protrusion 41 of the pressure plate 4 passes through the through hole 52. The outer peripheral surface of the diaphragm spring 5 is supported by the circumferential support protrusion 2d, and the axially inner side surface of the outer peripheral portion is supported by the axial support protrusion 2c.

<Release material>
The release member 6 is an annular plate member, and is disposed further outward in the axial direction of the diaphragm spring 5. A pressing protrusion 61 protruding inward in the axial direction is formed on the inner peripheral portion of the release member 6, and the pressing protrusion 61 supports an axially outer side surface of the inner peripheral portion of the diaphragm spring 5. In addition, six through holes are formed at equal intervals in the circumferential direction on the outer peripheral portion of the release member 6, and the release member 6 and the protruding portion 41 of the pressure plate 4 are connected by bolts 62 passing through the through holes. Is fixed. When the release member 6 is fixed to the pressure plate 4, the diaphragm spring 5 is compressed in the axial direction from a free state (a state where no force is applied).

<Operation>
Next, the operation will be described.

  In the state shown in FIG. 1, the diaphragm spring 5 is set in a state of being compressed in the axial direction, so that the output side rotating body 2 is pressed inward in the axial direction by the outer periphery of the diaphragm spring 5, and the diaphragm spring 5 The release member 6 and the pressure plate 4 are pressed outward in the axial direction by the inner peripheral portion. Thereby, the clutch part 3 is pinched between the pressure plate 4 and the output side rotary body 2, and the 1st clutch plate 25 and the 2nd clutch plate 26 are press-contacted mutually. For this reason, the engine torque is transmitted from the input gear to the clutch housing 1 and is transmitted to the transmission-side input shaft via the clutch portion 3 and the output-side rotating body 2 (power transmission state).

  On the other hand, when the driver grasps the clutch lever, the operating force is transmitted to a bearing member (not shown) via a clutch wire or the like, and the release member 6 is moved inward in the axial direction via this bearing member. As the release member 6 moves inward in the axial direction, the pressure plate 4 is moved inward in the axial direction and the pressing force of the diaphragm spring 5 on the output side rotating body 2 is released. As a result, the pressure contact between the first clutch plate 25 and the second clutch plate 26 in the clutch portion 3 is released, and transmission of power from the clutch housing 1 to the output-side rotating body 2 is cut off (power transmission cut-off state).

  In this embodiment, since the through hole 52 of the diaphragm spring 5 is formed and the projecting portion 41 of the pressure plate 4 passes through the through hole 52, it is compared with the conventional structure shown in FIG. Thus, the inner diameter of the diaphragm spring 5 can be further reduced. For this reason, it is not necessary to increase the radial dimension of the release member 6 that supports the inner peripheral portion of the diaphragm spring 5. Further, since no slit or the like is formed in the diaphragm spring 5, it is possible to prevent the pressing force of the diaphragm spring 5 from being lowered. That is, the pressing force can be increased as compared with the case where a slit is formed in the diaphragm spring 5 so as to avoid the protruding portion 41, and the diaphragm spring 5 can be reduced in size. Furthermore, since the release member 6 presses the inner peripheral side of the diaphragm spring 5 during the release operation, it is possible to prevent deflection due to the press.

[Other Embodiments]
In the above embodiment, the present invention has been described with respect to the clutch device for motorcycles, but the present invention is not limited to this, and may be applied to other clutch devices, for example, a clutch device for automobiles.

The longitudinal cross-sectional view of the clutch apparatus which concerns on one Embodiment of this invention. The front view of the said apparatus. The longitudinal cross-sectional view of the conventional clutch apparatus.

Explanation of symbols

1 Clutch housing 2 Output side rotating body (first rotating body)
2c Axial support protrusion (second contact protrusion)
2f Friction flange 3 Clutch part 4 Pressure plate (second rotating body)
5 Diaphragm spring (pressing member)
6 Release member (disc-shaped member)
25 First clutch plate (plate member)
26 Second clutch plate (plate member)
19 support plate 41 protrusion 52 through-hole 61 pressing protrusion (first contact protrusion)

Claims (5)

A clutch device for transmitting power from an input side member to an output side member and for interrupting power transmission by a release operation of a release mechanism,
A clutch housing (1) connected to one side of the input side member and the output side member and having an opening on the first direction side in the axial direction;
A disc-shaped first rotating body that is provided on the inner peripheral side of the clutch housing (1), is connected to the other of the input side member and the output side member, and has a plurality of through holes (2e) in a radially intermediate portion. (2) and
The clutch housing (1) is disposed on the second direction side in the axial direction opposite to the first direction of the first rotating body (2), and the clutch housing (1) and the first rotating body are disposed inside the clutch housing (1). A clutch part (3) having a plurality of plate members (25, 26) for transmitting and interrupting power to and from (2);
Wherein it is possible hold the said plate member (25, 26) between the clutch portion (3) the second the disposed direction first rotating body (2), the first pre-Symbol axis A second rotating body (4) having a plurality of projecting portions (41) projecting in the direction side;
The first rotating body (2) is disposed on the first direction side, the outer peripheral portion presses the first rotating body (2) toward the second direction side, and a plurality of through holes (52 An annular pressing member (52) having
The pressing member (52) is further disposed on the first direction side, and an inner peripheral portion supports an inner peripheral portion of the pressing member (5) and is moved by the release mechanism, thereby the pressing member (5). A disc-like member (6) for releasing the pressing force on the first rotating body (2)
Equipped with a,
Each of the plurality of protrusions (41) of the second rotating body (4) includes a plurality of through holes (2e) of the first rotating body (2) and a plurality of through holes (52 of the pressing member (52)). ), And the disk-shaped member (6) is fixed to the tip.
Clutch device.   The through hole (52) of the pressing member (5) has a radial position where the pressing member (5) presses the first rotating body (2) and a radial position where the pressing member (5) contacts the disk-shaped member (6). The clutch device according to claim 1, which is provided between the two.   The clutch device according to claim 1, wherein the through hole (52) is circular.   The first rotating body (2) has a friction flange (2f) that can contact the clutch portion (3) on the outer peripheral portion, and can be locked to the other of the input side member and the output side member on the inner peripheral portion. The clutch device according to claim 1, further comprising a spline hole (2b). The disk-shaped member (6) has a first contact protrusion (61) supporting an inner peripheral portion of the pressing member (5) on an inner peripheral portion,
The first rotating body (2) has a second contact protrusion (2c) that supports an outer peripheral portion of the pressing member (5).
The clutch device according to claim 1.

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