JPH0849731A - Clutch device - Google Patents

Abstract

PURPOSE:To reduce the number of part items so as to simplify manufacture by using the cylindrical part of a side plate, forming a part of the damper mechanism of an input part, as a clutch body case. CONSTITUTION:When torque from the crankshaft of an engine is inputted, this torque is inputted to a hub flange 12 and a disc plate 13 through a driving gear 6 and gears 12c, 13a and further transmitted to side plates 15, 16 through a coil spring 14. The torque transmitted to the side plate 16 is transmitted to an output member 3 through input side and output side clutch plates 20, 21 and outputted to a transmission input shaft 7. Since the side plate is made of metal, a cylindrical part 16b can be easily formed while forming a part of damper mechanism. Also an internal tooth 16d can be formed by press working so as to be formed easily at a low cost compared to the case of forming the tooth of a spline or the like by cutting.

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 cone 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, the pressure plate is normally urged toward the clutch body side by the cone spring, and the clutch is in a connected state. In this case, the clutch plate on the input side and the clutch plate on the output side 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-mentioned conventional clutch device, a damper mechanism may be provided in the input portion in order to absorb the torque fluctuation of the engine. The damper mechanism includes a drive member to which power is input, a pair of side plates arranged on both sides of the drive member, and a torsion spring arranged between the drive member and the side plate. On the other hand, since the clutch main body has a plurality of clutch plates, a case for housing these is provided. As described above, the conventional clutch device with the damper mechanism has a large number of parts and has a complicated structure.

An object of the present invention is to reduce the number of parts in a clutch device having a damper mechanism. Another object of the present invention is to simplify the manufacturing and reduce the cost of the clutch device having the damper mechanism.

[0006]

A clutch device according to the present invention is a device for transmitting and cutting off power between a crankshaft on the engine side and an input shaft of a transmission, and has an input part and an output part. The clutch main body, the pressure contact means, the pressure contact release means, and the urging member are provided. The input portion includes a drive member to which power from the crankshaft is input, a side plate disposed on the side of the drive member and having a cylindrical portion extending in the axial direction on the outer peripheral portion, and a circle between the drive member and the side plate. And an elastic member arranged so as to be compressible in the circumferential direction. The output part is arranged concentrically with the input part and is connectable to the input shaft of the transmission. The clutch body has an input side clutch plate that engages with the cylindrical portion of the side plate and an output side clutch plate that is connected to the output portion. The pressing means is a means for pressing both clutch plates against each other. The pressure contact release means is means for releasing the pressure contact of the pressure contact means. The urging member is a member for urging the pressure contact means so that the input side clutch plate and the output side clutch plate are pressed against each other.

In the clutch device, the side plates are preferably made of sheet metal. In the clutch device, it is preferable that the cylindrical portion of the side plate is formed with an engaging concave and convex for engagement with an outer peripheral portion of the input side clutch plate by press working.

[0008]

In the clutch device according to the present invention, when the clutch is engaged, the pressing member is urged toward the clutch body by the urging member, whereby the input side and output side clutch plates are pressed against each other. In this case, the power from the engine side is transmitted from the drive member of the input section to the side plate via the elastic member, and is further transmitted to the output section via the clutch body. At this time, the power transmitted to the side plate is transmitted to the input side clutch plate of the clutch body via the cylindrical portion of the side plate.

On the other hand, when the release mechanism releases the pressure contact between the input side and output side clutch plates through the pressure contact releasing means, the clutch is disengaged. In this case, the power from the input section is not transmitted to the output section.
Here, the cylindrical portion of the side plate that constitutes a part of the damper mechanism of the input unit is also used as the case of the clutch body, so that the number of parts in the clutch device having the damper mechanism is reduced.

When the side plate is made of sheet metal, the damper mechanism portion and the clutch case portion of the side plate can be easily manufactured by press working, and the cost is low. When the concavo-convex for engagement with which the outer peripheral portion of the input side clutch plate engages is formed in the cylindrical portion of the side plate by press working, compared to the case where the engaging portion such as a spline is formed by cutting. It can be manufactured at low cost.

[0011]

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.

[0012] Input unit The input unit 2 includes a 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 the 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 section 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 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.

In this case, 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.

[0025]

In the clutch device according to the present invention, the cylindrical portion of the side plate forming a part of the damper mechanism of the input portion is also used as the case of the clutch body. Therefore, the clutch device having the damper mechanism is used. The number of parts is decreasing. In the clutch device, when the side plate is made of sheet metal, the damper mechanism part of the side plate and the clutch case part can be integrally manufactured, and can be easily manufactured by press working, which is inexpensive.

In the above-mentioned clutch device, when the concavo-convex for engaging the input side clutch plate is formed in the cylindrical portion of the side plate by pressing, as compared with the case where the engaging portion such as the spline is formed by cutting. It can be manufactured at low cost.

[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 member 4 Clutch main body 5 Clutch operating mechanism 7 Transmission input shaft 12 Hub flange 13 Disc plate 14 Coil spring 15, 16 Side plate 16b Cylindrical part 16d Internal tooth 20 Input side clutch plate 21 Output side Clutch plate 26 Clutch operating member 26a Lever part 26b Pressure contact part 28 Cone spring

Claims (3)

[Claims] 1. A clutch device for transmitting and disconnecting power between a crankshaft on the engine side and an input shaft of a transmission, comprising: a drive member to which power from the crankshaft is input; An input unit having a side plate disposed on the side of the member and having an outer peripheral portion having a cylindrical portion extending in the axial direction, and an elastic member disposed between the drive member and the side plate so as to be circumferentially compressible; An output part arranged concentrically with the input part and connectable to an input shaft of the transmission; an input side clutch plate engaging with a cylindrical part of the side plate; and an output side clutch plate connected to the output part. A clutch body having a pressure contact means for pressing the both clutch plates against each other, and a pressure contact releasing means for releasing pressure contact between the pressure contact means, Clutch device provided with a biasing member for biasing said urging means so as fill force side and the output side clutch plates are pressed against each other. 2. The clutch device according to claim 1, wherein the side plate is made of sheet metal. 3. The clutch device according to claim 2, wherein the cylindrical portion of the side plate is provided with an engaging concave and convex for engaging with an outer peripheral portion of the input side clutch plate by press working.