JPH0849729A - Clutch device - Google Patents

Abstract

PURPOSE:To simplify the structure of release mechanism so as to improve efficiency at the time of release operation by integrally forming the lever part and pressure contact part of a clutch operating member. CONSTITUTION:In the state of release operation not being performed, a clutch operating member 26 is energized onto the clutch body 4 side by a cone spring 28 so as to bring input side and output side clutch plates 20, 21 into pressure contact with each other. At the time of clutch release, release mechanism 9 is drawn to the right, and the clutch operating member 26 moves in the same direction against the energizing force of the cone spring 28. As a result, the pressure contact between the input side and output side clutch plates 20, 21 is released to cut off torque transmission. Since the pressure contact of both clutch plates 20, 21 is released by the clutch operating member 26 integrally formed of a lever part and a pressure contact part, the operating force and operating quantity of the release mechanism 9 directly act upon the pressure contact part. Efficiency at the time of release operation is thereby desirable so as to improve the disconnection of a clutch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch device,
The present invention relates to a clutch device for transmitting and disconnecting power between a crankshaft on the engine side and an input shaft of a transmission.

[0002]

2. Description of the Related Art For example, a clutch device for a motorcycle is
It is located at one end of the transmission input shaft,
It is used to transmit or cut off the torque transmitted from the engine crankshaft to the transmission input shaft. Such a clutch device includes a clutch main body including an input unit connected to a member on the engine side, an output unit connected to a transmission input shaft, and a plurality of clutch plates arranged between the input unit and the output unit. And a clutch operating mechanism for pressing the clutch body to connect the clutch device.

The clutch operating mechanism includes a pressure plate for pressing a plurality of clutch plates of the clutch body against each other, a coil spring for urging the pressure plates toward the clutch body, and a lever member for releasing the pressure contact of the pressure plates. And have. In such a clutch device, normally, the pressure plate is biased toward the clutch body side by the coil spring, and the clutch is in a connected state. In this case, the input side clutch plate and the output side clutch plate are pressed against each other, and torque is transmitted from the input section to the output section. On the other hand, when the lever member is operated by the release mechanism and the pressure plate is separated from the clutch body, the clutch is disengaged, and the torque transmission from the input unit to the output unit is cut off.

[0004]

In the above conventional clutch device, the pressure plate is operated from the release mechanism via the lever member during the release operation. Generally, since there is looseness in the engaging portion between the lever member and the pressure plate, the operation force and the operation amount (stroke) from the release mechanism cannot be efficiently transmitted to the pressure plate. Further, the conventional structure requires a structure for engaging the lever member and the pressure plate, and the structure is complicated.

An object of the present invention is to provide a clutch device,
It is to improve the efficiency of the release operation. Another object of the present invention is to simplify the structure of the release mechanism in the clutch device.

[0006]

A clutch device according to the present invention is a device for transmitting and disconnecting power between a crankshaft on the engine side and an input shaft of a transmission. It has an input part for inputting, an output part arranged concentrically with the input part and connectable to an input shaft of a transmission, a clutch main body, a clutch operating member, and a biasing member. The clutch body has an input side clutch plate connected to the input section and an output side clutch plate connected to the output section. The clutch operating member has a pressure contact portion for pressure-contacting the input-side and output-side clutch plates and a lever portion continuously formed integrally with the pressure-contact portion for separating the pressure-contact portion from both clutch plates. It is a member that can approach and separate from. The biasing member is a member that biases the clutch operating member so that both clutch plates are pressed against each other.

In the clutch device, the clutch operating member is formed in an annular shape, and the pressure contact portion is formed on the outer peripheral side of the lever portion, and the biasing member contacts the pressure contact portion to form the pressure contact portion. It is preferable that the clutch body is biased. In the clutch device, it is preferable that the urging member is arranged so as to abut on a side surface of the clutch operating member opposite to the clutch body.

In the clutch device, it is preferable that the clutch operating member is attached to the output portion so as to be axially movable and non-rotatable relative to the output portion. In the clutch device, the input section includes a hub flange to which power from the engine side is input, at least one side plate laterally disposed relative to the hub flange, and the hub flange and the side plate. It is preferable to have an elastic member disposed between the plate and the plate so as to be compressible in the circumferential direction.

In the clutch device, the side plate has a cylindrical portion extending in the axial direction on the outer peripheral portion,
It is preferable that the input side clutch plate is engaged with the cylindrical portion so as to be axially movable and non-rotatable.

[0010]

In the clutch device according to the present invention, the clutch operating member is urged toward the clutch body by the urging member,
As a result, the input side and output side clutch plates are brought into pressure contact with each other by the pressure contact portion of the clutch operating member. In this case, the clutch is in the engaged state, and the power from the input section is transmitted to the output section. On the other hand, when the pressure contact portion is separated from the clutch main body by the release mechanism via the lever portion of the clutch operating member, the pressure contact between the input side and output side clutch plates is released and the clutch engagement is released. In this case, the power from the input section is not transmitted to the output section.

Here, the lever portion and the pressure contact portion are integrally formed, and the operating force from the release mechanism is directly transmitted to the pressure contact portion. Therefore, the efficiency of the release operation is improved. Further, a structure for engaging the lever portion and the pressure contact portion is not necessary, the number of parts is reduced, and the structure is simplified. In the clutch device, when the pressure contact portion of the clutch operating member is formed on the outer peripheral side of the lever portion and the biasing member is in contact with the pressure contact portion, the biasing force of the biasing member is efficiently transmitted to the clutch body. .

In the above clutch device, the biasing member is
When the clutch operating member is arranged so as to come into contact with the side surface of the clutch operating member opposite to the clutch body, there are few constituent members outside the device of the biasing member, so that the biasing member can be easily assembled and disassembled. . In the clutch device, when the clutch operating member rotates together with the output portion, the pressure contact surface of the clutch operating member can be used as the power transmission surface, and the power transmission capacity can be improved.

In the above-mentioned clutch device, when the input portion has a hub flange, at least one side plate, and an elastic member arranged between them in a circumferentially compressible manner, they are constituted by them. The damper mechanism can absorb the torque fluctuation from the input section, and the smooth power transmission becomes possible. In the clutch device, when the side plate has a cylindrical portion on the outer peripheral portion and the input side clutch plate is engaged with the cylindrical portion, a member that constitutes a damper mechanism and a member that transmits power to the input side clutch plate. Can be combined with, and the number of parts can be reduced.

[0014]

1 and 2 show a clutch device 1 according to an embodiment of the present invention. In FIG. 1, O-O is a rotation axis of the clutch device 1. The overall configuration clutch device 1 is attached to the tip of a transmission input shaft 7, and has an input portion 2 to which torque is transmitted from a crankshaft (not shown) on the engine side, and an output member fixed to the transmission input shaft 7. 3, a clutch main body 4 arranged between the input section 2 and the output member 3, and a clutch operating mechanism 5 for pressing the clutch main body 4 into contact with each other.

The input unit input unit 2, the hub flange 12, a disk plate 13 disposed on the illustrated left side of the hub flange 12, a coil spring 14, the side plates 15 of a pair of supporting the coil spring 14, 16 and. The coil spring 14 includes the hub flange 12 and the disc plate 1.
It is compressible in the circumferential direction between 3 and the pair of side plates 15, 16. Thus, the input section 2 is provided with a damper mechanism for absorbing torque fluctuations from the engine.

The hub flange 12 has a central boss 12a.
And a flange portion 12b extending from the boss 12a to the outer peripheral side.
And a gear 12c provided on the outer peripheral portion of the flange portion 12b.
And have. The boss 12a is rotatably supported on the transmission input shaft 7 via a needle bearing 11. The flange portion 12b is formed with a plurality of notches 12d extending in the circumferential direction. The gear 12c is
Drive gear 6 fixed to the crankshaft on the engine side
Meshes with.

A gear 13a is provided on the outer peripheral portion of the disc plate 13.
The gear 13a meshes with the drive gear 6 like the gear 12c of the hub flange 12. A notch 13b is formed at a position corresponding to the notch 12d of the hub flange 12 in the radial middle portion of the disc plate 13. The coil spring 14 is arranged in the notches 12d and 13b.

The pair of side plates 15 and 16 are both made of sheet metal and are formed by press molding. One side plate 15 is arranged on the left side of the disc plate 13 in the drawing. In addition, the side plate 15 has a pressing portion 1 at a position corresponding to the coil spring 14.
5a is formed. The pressing portion 15a is cut and raised in the axial direction and regulates the movement of the coil spring 14 in the axial direction. The other side plate 16
Is arranged on the right side of the hub flange 12 in the drawing,
The disc portion 16a and the disc portion 16a on the outer periphery of the disc portion 16a.
And a cylindrical portion 16b integrally formed with the. A pressing portion 16c is formed on the disc portion 16a so as to correspond to the coil spring 14. The holding portion 16c is cut and raised in the axial direction and regulates the movement of the coil spring 14 in the axial direction. Also, both side plates 1
5, 16 are connected by a plurality of stop pins 17. The stop pin 17 penetrates through holes 12e and 13c formed in the hub flange 12 and the disc plate 13, respectively. Since the holes 12e and 13c are formed to be long in the circumferential direction, the side plates 15 and 16 can rotate relative to the hub flange 12 and the disc plate 13 by a predetermined angle. Further, a plurality of inner teeth 16d are formed on the inner peripheral side of the cylindrical portion 16b of the side plate 16. The inner teeth 16d are formed by pressing the cylindrical portion 16b. Further, the cylindrical portion 16b is formed with a hole 16e communicating from the outer peripheral surface to the inner tooth 16d.

Here, since the side plate 16 is made of sheet metal, the cylindrical portion 16b can be easily formed while forming a part of the damper mechanism. Further, since the inner teeth 16d can be formed by press working, the inner teeth 16d can be formed easily and inexpensively as compared with the case where teeth such as splines are formed by cutting. The coil spring 14 is arranged in the notches 12d and 13b of the hub flange 12 and the disc plate 13, and each plate 15 is formed with the notches 12d and 13b and the pressing portions 15a and 16c at both ends in the circumferential direction. 1
The window holes 6 are in contact with both ends in the circumferential direction. for that reason,
The coil spring 14 is circumferentially compressed when relative rotation occurs between the input side member (the hub flange 12 and the disc plate 13) and the output side member (the side plates 15 and 16).

Between the inner peripheral portion of the disc plate 13 and the inner peripheral portion of one side plate 15, a cone spring 18 for generating a hysteresis torque in the input portion 2 is arranged in a compressed state. ing. Output Member The output member 3 is a member mainly formed of a boss 30, a flange portion 31 that extends from the boss 30 to the outer peripheral side, and a cylindrical portion 32 that extends from an intermediate portion in the radial direction of the flange portion 31 to the right in the drawing. . Boss 30 and boss 12a of hub flange 12
A thrust plate 40 is arranged between the and. External teeth 33 are formed on the outer peripheral side of the cylindrical portion 32. The cylindrical portion 32 has a hole 3 communicating with the groove between the inner peripheral surface and the outer tooth 33.
4 are formed. A spline 35 is formed on the inner peripheral portion of the boss 30, and the spline 35 meshes with a spline shaft formed at the tip of the transmission input shaft 7. Six protrusions 3 are provided on the inner peripheral side of the cylindrical portion 32.
6 are formed at equal intervals in the circumferential direction so as to project rightward in the drawing. A screw hole 37 is formed in each protrusion 36.

Clutch main body The clutch main body 4 is a cylindrical portion 16b of the side plate 16.
And the cylindrical portion 32 of the output member 3 are arranged in an annular space. The clutch body 4 includes a spacer plate 19
And a plurality of input side clutch plates 20 and a plurality of output side clutch plates 21. The spacer plate 19 is arranged so as to contact the flange portion 31 of the output member 3. Further, the input side and output side clutch plates 20 and 21 are alternately arranged. Friction facings 2 are provided on both sides of the input side clutch plate 20.
0a is attached. External teeth 20b are formed on the outer periphery of the input side clutch plate 20.
(See FIG. 2) meshes with the inner teeth 16d of the side plate 16. In this way, the input side clutch plate 20 is fixed so as not to rotate relative to the side plate 16, and is movable in the axial direction. A plurality of inner teeth 21 a are formed on the inner peripheral side of the output side clutch plate 21. The internal teeth 21 a are provided on the cylindrical portion 32 of the output member 3.
Meshes with the outer teeth 33 formed on the. This allows
The output side clutch plate 21 is fixed so as not to rotate relative to the output member 3 and is movable in the axial direction.

Here, the side plate 16 of the input unit 2 is used.
The cylindrical portion 16b constitutes a case of the clutch main body 4, and the input side clutch plate 20 is engaged with the cylindrical portion 16b. That is, one of the members forming the damper mechanism is also used as the clutch case of the multi-plate clutch device, which reduces the number of parts and simplifies the structure.

Clutch Operating Mechanism The clutch operating mechanism 5 is mainly composed of a clutch operating member 26, a cone spring 28 for urging the clutch operating member 26 toward the clutch main body 4, and a support plate 25 supporting the cone spring 28. Is configured.
The clutch operating member 26 is disposed on the right side of the clutch body 4 in the drawing, and the inner peripheral portion thereof is rotatably supported by the release mechanism 9 via the bearing 8. Clutch operating member 26
Is a pressure contact portion 2 that is integrally formed with the lever portion 26a on the inner peripheral side and continuously extends from the lever portion 26a to the outer peripheral side.
6b and. The lever portion 26a is a portion for transmitting the operating force from the release mechanism 9 to the pressure contact portion 26b. The pressure contact portion 26b has a pressure contact surface on the clutch body 4 side. A plurality of raised portions 26c extending in the circumferential direction are formed on the side surface opposite to the pressure contact surface. Ridge 26c
Are formed at substantially the same positions as the effective radial positions of the input side clutch plate 20 and the output side clutch plate 21. Further, the protrusion 36 of the output member 3 is provided on the lever portion 26a.
A hole is formed therethrough. Due to the engagement of this hole and the projection 36, the clutch operating member 26 is non-rotatable relative to the output member 3 and movable in the axial direction.
Further, at the outer peripheral end of the clutch operating member 26, a protrusion 2 for supporting the cone spring is provided on a side surface opposite to the pressure contact surface.
6d is formed in a plurality of places. The projection 26d allows the cone spring 28 to be positioned in the radial direction.

Here, since the clutch operating member 26 rotates together with the output member 3, the pressure contact surface of the clutch operating member 26 can function as a power transmission surface. The support plate 25 is fixed to the tip of the protrusion 36 of the output member 3 with a bolt 29. The inner peripheral end of the cone spring 28 is supported by the support plate 25. The cone spring 28 is arranged at substantially the same position as the press contact portion 26b of the clutch operating member 26 in the radial direction, and the outer peripheral portion presses the raised portion 26c of the clutch operating member 26. That is, cone spring 2
8 is arranged such that the point of action on the clutch body 4 is located in a region facing the friction surfaces of the input side clutch plate 20 and the output side clutch plate 21. Therefore, the biasing force of the cone spring 28 directly acts on the pressure contact portion 26b and the clutch body 4, and the clutch body 4 can be efficiently pressure contacted.

When the power transmission operation release operation is not performed, the clutch operating member 26 is urged toward the clutch body 4 side by the urging force of the cone spring 28, whereby the input side and output side clutch plates 20 and 21. Are pressed together. When torque is input from the crankshaft (not shown) of the engine in such a state, this torque is input to the hub flange 12 and the disc plate 13 via the drive gear 6, the gears 12c and 13a, and further, It is transmitted to the side plates 15 and 16 via the coil spring 14. The torque transmitted to the side plate 16 is applied to the input side and output side clutch plates 20, which are in pressure contact with each other,
It is transmitted to the output member 3 via 21 and is output to the transmission input shaft 7.

When the above clutch is engaged, the cone spring 28 is in contact with the raised portion 26c and presses the press contact portion 26b. The raised portion 26c is for each clutch plate 2
Since it is formed at substantially the same position as the effective radial positions of 0 and 21, the biasing force of the cone spring 28 efficiently acts on the press contact portion 26b. Operation during release When the clutch is released, the release mechanism 9 is pulled to the right in FIG. 1, whereby the clutch operating member 26 moves in the same direction against the biasing force of the cone spring 28. As a result,
The pressure contact between the input side and output side clutch plates 20 and 21 is released, and the torque transmission is cut off.

Here, since the clutch operation member 26 in which the lever portion and the pressure contact portion are integrally formed releases the pressure contact between the clutch plates 20 and 21, the release mechanism 9
The operating force and the operating amount of directly act on the press contact portion. Therefore, the efficiency at the time of release operation is good, and the number of defective clutch disconnections is reduced. Concerning workability of assembling the cone spring In this structure, the cone spring 28 is arranged outside the device with respect to the clutch operating member 26. The inner peripheral end of the cone spring 28 is supported by a support plate 25 fixed by bolts 29. Therefore, the cone spring 28 can be easily removed by simply removing the bolt 29, and the attachment / detachment is easy. Therefore, the setting of the pressure contact load of the clutch can be easily changed.

[0028]

The clutch device according to the present invention is provided with the clutch operating member in which the pressure contact portion for pressing the input side and output side clutch plates and the lever portion for releasing the pressure contact are integrally formed. The operating force and the operating amount of are directly transmitted to the press contact portion, and the efficiency at the time of release operation is improved. Moreover, the number of parts is reduced and the structure is simplified.

When the pressure contact portion of the clutch operating member is formed on the outer peripheral side of the lever portion and the biasing member is in contact with the pressure contact portion, the biasing force of the biasing member is efficiently transmitted to the clutch body. . Further, when the biasing member is arranged so as to come into contact with the side surface of the clutch operating member opposite to the clutch body, the biasing member can be easily assembled and disassembled.

When the clutch operating member rotates together with the output portion, the pressure contact surface of the clutch operating member can be used as the power transmission surface, and the power transmission capacity can be improved. The input section
A hub flange and at least one side plate,
In the case where there is an elastic member arranged so as to be able to be compressed in the circumferential direction between these, it is possible to absorb torque fluctuations from the input section by the damper mechanism configured by these,
Smooth power transmission is possible. Also, when the side plate has a cylindrical portion on the outer peripheral portion and the input side clutch plate is engaged with the cylindrical portion, it also serves as a member that constitutes the damper mechanism and a member that transmits power to the input side clutch plate. The number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a clutch device in which an embodiment of the present invention is adopted.

FIG. 2 is a partially cutaway plan view of the clutch device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 clutch device 2 input part 3 output part 4 clutch body 5 clutch operating mechanism 7 transmission input shaft 9 release mechanism 12 hub flanges 15 and 16 side plates 16b cylindrical part 20 input side clutch plate 21 output side clutch plate 25 support plate 26 clutch Operating member 28 Cone spring

Claims (6)

[Claims] 1. A clutch device for transmitting and disconnecting power between an engine-side crankshaft and an input shaft of a transmission, the input device receiving power from the crankshaft, and the input device. A clutch body that is arranged concentrically with the section, has an output section that can be connected to the input shaft of the transmission, an input side clutch plate that is connected to the input section, and an output side clutch plate that is connected to the output section; A pressure contact portion for pressing the both clutch plates and a lever portion continuously formed integrally with the pressure contact portion for separating the pressure contact portion from the both clutch plates;
A clutch device comprising: a clutch operating member that can be moved toward and away from the clutch body; and a biasing member that biases the clutch operating member so that the clutch plates are pressed against each other. 2. The clutch operating member is formed in an annular shape, the pressure contact portion is formed on the outer peripheral side of the lever portion, and the biasing member contacts the pressure contact portion to connect the pressure contact portion. The clutch device according to claim 1, wherein the clutch device is biased toward the clutch body. 3. The clutch device according to claim 1, wherein the urging member is arranged so as to abut a side surface of the clutch operating member opposite to the clutch body. 4. The clutch device according to claim 1, wherein the clutch operating member is attached to the output portion so as to be axially movable and non-rotatable relative to the output portion. 5. The input section comprises a hub flange to which power from the engine side is input, at least one side plate disposed on the side of the hub flange so as to be rotatable relative to the hub flange, and the hub. The clutch device according to any one of claims 1 to 4, further comprising: an elastic member arranged circumferentially between the flange and the side plate so as to be compressible. 6. The side plate has a cylindrical portion extending in an axial direction on an outer peripheral portion thereof, and the input side clutch plate is engaged with the cylindrical portion so as to be axially movable and relatively non-rotatable. The clutch device according to claim 5, wherein: