JP2001041259A - Diaphragm spring and clutch cover assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity of a diaphragm spring as interference between a rib and a peripheral member is prevented from occurring. SOLUTION: This diaphragm spring 8 is mounted on the flywheel 50 of a vehicle together with a clutch cover 2 and is worked to press a clutch disc assembly 51 against the flywheel 50 through a pressure plate 3 in linkage with a release device situated on the reverse side to the flywheel 50. The diaphragm spring is provided with a press part 11 to press the pressure plate 3 against the flywheel 50, a support part 12 supported at a clutch cover 2, ribs 13a and 13b formed in a manner to extend to the inner peripheral side of the support part 12 and radially extend, and provided at a tip part on the inner peripheral side with a plurality of lever parts 13 with which the release device makes contact. On the clutch cover 12 side, the rib of the lever part 13 is formed at 13a on a surface on the flywheel 50 side and on the inner peripheral side, the rib is formed at 13b on the release device side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch disc assembly which is mounted on a flywheel of a vehicle together with a diaphragm spring, in particular, a clutch cover, and interlocks with a release device provided on a side opposite to the flywheel via a pressure plate. The present invention relates to an annular diaphragm spring for pressing a three-dimensional object against a flywheel.

[0002]

2. Description of the Related Art Generally, a clutch device includes a clutch cover assembly for pressing a friction member of a clutch disk assembly against a flywheel. The clutch cover assembly includes a clutch cover fixed to the flywheel, a pressure plate fixed to the clutch cover so that it cannot rotate relatively and can move in the axial direction, and a pressure plate supported by the clutch cover and pressing the pressure plate toward the flywheel. Diaphragm spring or coil spring.

In a push-type clutch cover assembly, a diaphragm spring presses a pressure plate with a supporting portion supported by the clutch cover as a fulcrum, and a pressing portion formed on an outer peripheral side of the supporting portion. Further, a release device can be brought into contact with a tip portion of a lever portion formed on the inner peripheral portion from the support portion. According to this diaphragm spring, by moving the release device to the flywheel side, the pressing portion is pulled up to the transmission side with the support portion as a fulcrum, and the pressing on the pressure plate is released.

On the other hand, in the pull-type clutch cover assembly, the pressure portion of the diaphragm spring presses the pressure plate with the support portion supported by the clutch cover as a fulcrum. A lever portion is further formed on the inner peripheral side from the pressing portion, and a release device can be brought into contact with the tip portion. According to this diaphragm spring, by moving the release device to the transmission side, the pressing portion is pulled up to the transmission side, and the pressing on the pressure plate is released.

[0005]

Some diaphragm springs have improved rigidity by forming ribs in order to prevent deformation during clutch operation.
The rib is usually formed in each lever portion so as to extend in the radial direction, and is formed only on one surface of the diaphragm spring.

However, since the inner peripheral portion of the clutch cover is arranged on the release device side of the diaphragm spring, if a rib is formed on the release device side surface, when the lever portion moves to the transmission side, The ribs interfere with the inner peripheral portion of the clutch cover. Here, in order to avoid interference between the rib and the clutch cover, if the rib is not formed at a position near the clutch cover of the lever portion, the rib is formed only at the distal end portion of the diaphragm spring, and the diaphragm spring No significant improvement in rigidity can be expected.

Further, since a clutch disc assembly is arranged on the flywheel side of the diaphragm spring, if a rib is formed on the flywheel side, when the diaphragm spring moves to the engine side, the rib and the clutch disc are moved. It interferes with the assembly. In particular, the damper part of the clutch disk assembly
Since it has a shape protruding in the direction of the rotation axis as compared with other portions, it is easy for interference with the ribs to occur. Also in this case, if no rib is formed at the interference portion with the damper portion of the clutch disk assembly, a great improvement in rigidity cannot be expected.

An object of the present invention is to improve the rigidity of a diaphragm spring while avoiding interference between a rib and its peripheral members.

[0009]

A diaphragm spring according to claim 1 is mounted on a flywheel of a vehicle together with a clutch cover, and interlocks with a release device provided on a side opposite to the flywheel through a pressure plate via a pressure plate. An annular diaphragm spring for pressing a disc assembly against a flywheel, the diaphragm spring having a pressing portion, a support portion, and a lever portion. The pressing portion is a portion for pressing the pressure plate toward the flywheel. The support is supported by the clutch cover.
The lever portion is formed so as to extend to the inner peripheral side of the support portion and has a rib extending in the radial direction, and a plurality of release devices can be brought into contact with the distal end portion on the inner peripheral side. The rib of the lever portion is formed on the flywheel side surface on the support portion side, and is formed on the release device side surface on the inner peripheral side.

In this diaphragm spring, since the rib of the lever portion is formed on the surface of the flywheel side on the support portion side, when the peripheral member is disposed on the opposite side to this surface, the lever portion is not connected to the peripheral member. , It is possible to avoid interference with peripheral members. Further, since the rib of the lever portion is formed on the surface on the release device side on the inner peripheral side, when the peripheral member is disposed on the opposite side to this surface, even if the lever portion approaches the peripheral member, Interference with peripheral members can be avoided.

Further, since the rib is formed to extend in the radial direction, interference between the rib and the peripheral member can be avoided, and the rigidity of the diaphragm spring can be maintained. A diaphragm spring according to a second aspect is the diaphragm spring according to the first aspect, wherein the rib formed on the support portion side of the lever portion faces a part of the clutch cover.

In this diaphragm spring, the rib on the support portion side has a part of the clutch cover disposed on the opposite surface, so that even if the lever portion approaches the clutch cover, it interferes with a part of the clutch cover. Can be avoided. In the diaphragm spring according to claim 3,
3. The diaphragm spring according to claim 1, wherein the clutch disk assembly has a damper portion including a torsion spring. The rib formed on the inner peripheral side of the lever portion faces the damper portion.

In this diaphragm spring, the rib on the inner peripheral side has the damper portion of the clutch disk assembly disposed on the opposite surface, so that the rib portion interferes with the damper portion even when the lever portion approaches the clutch disk assembly. Can be avoided. A clutch cover assembly according to a fourth aspect is a clutch cover assembly for pressing a clutch disk assembly against a flywheel, and includes a clutch cover, a pressure plate, and a diaphragm spring. The clutch cover is fixed to the flywheel so as to be integrally rotatable. The pressure plate is mounted on the clutch cover so as to be integrally rotatable and movable in the axial direction. 4. The diaphragm spring according to claim 1, wherein the diaphragm spring is supported by a clutch cover.

In this clutch cover assembly, when the clutch is connected, the inner peripheral end of the lever portion is in a free state with respect to the release device, and the pressing portion presses the pressure plate toward the flywheel. Here, the clutch disc assembly is pressed between the pressure plate and the flywheel, rotates integrally with the flywheel, and torque from the flywheel is transmitted to the clutch disc assembly.

At the time of release, the inner peripheral end of the lever is driven by the release device. Then, the pressing portion turns around the support portion as a fulcrum and moves to a side away from the flywheel. As a result, the pressure plate is separated from the flywheel, the clutch is released, and the torque from the flywheel is cut off. Here, the interference between the diaphragm spring and the peripheral member is avoided, so that the deformation of the diaphragm spring during the operation of the clutch can be suppressed and the disconnection of the clutch can be maintained.

[0016]

1 and 2 show a clutch cover assembly 1 according to an embodiment of the present invention. The clutch cover assembly 1 shown in FIG. 1 is used for a push-type clutch device. An engine (not shown) is disposed on the left side (hereinafter referred to as an input side) of the clutch cover assembly 1 in FIG. 1, and a transmission (not shown) is disposed on the right side (hereinafter referred to as an output side) in FIG. The line OO in FIG. 1 is the rotation axis of the clutch device.

In the clutch cover assembly 1, the friction member 51a of the clutch disk assembly 51 is connected to the flywheel 50.
To release the pressure to disconnect the clutch, and is mainly composed of the clutch cover 2, the pressure plate 3, and the diaphragm spring 8. The clutch cover 2 is a plate member formed in a generally dish shape, and has a large-diameter hole formed in a radially central portion. The outer peripheral portion of the clutch cover 2 is fixed to the flywheel 50 by bolts 21. Thus, the clutch cover 2 can rotate integrally with the flywheel 50. A support portion 12 of the diaphragm spring 8 is fixed to an inner peripheral portion of the clutch cover 2 by a stud pin 19.

The pressure plate 3 is an annular member arranged inside the clutch cover 2. On the input side of the pressure plate 3, a pressing surface 3a for pressing the friction member 51a toward the input side and pressing against the flywheel 50 is formed. On the opposite side of the pressing surface 3a, a plurality of protrusions 3b protruding toward the output side are formed at predetermined intervals in the circumferential direction. The pressing portion 11 of the diaphragm spring 8 can abut on the output side end surface of the protruding portion 3b.
The pressure plate 3 is fixed to the clutch cover 2 by a strap plate (not shown) so as to be relatively non-rotatable and movable in the axial direction, and is urged away from the flywheel 50. Thus, the pressure plate 3 moves to the output side following the movement of the pressing portion 11 of the diaphragm spring 8 to the output side.

The diaphragm spring 8 is a disc-shaped member for pressing the pressure plate 3 toward the input side. As shown in FIGS. 2 and 3, the diaphragm spring 8 has a pressing portion 11, a support portion 12, and a plurality of lever portions 13. Slits are formed between the adjacent lever portions 13, 13, and trapezoidal holes 4 a are formed in the outer peripheral portions of these slits.

The pressing portion 11 is a portion for pressing the pressure plate 3 against the flywheel 50. In this embodiment, the pressing portion 11 is a region on the outermost peripheral side of the diaphragm spring 3. The outer peripheral portion of the pressing portion 11 is in contact with the protruding portion 3b of the pressure plate 3 (see FIG. 1).
The support portion 12 is a portion on the inner peripheral side of the pressing portion 11, and is supported by the stud pin 19 and the wirings 20, 21 so as to be immovable in the axial direction with respect to the clutch cover 2.

The lever portion 13 is a portion extending in the radial direction further inwardly of the support portion 12, and a release device can be brought into contact with an inner peripheral end portion. An outer peripheral rib 13a is formed on the outer peripheral side on the input side surface of the lever portion 13, and an inner peripheral rib 13b is formed on the inner peripheral side of the outer peripheral rib 13a on the output side surface. Outer and inner ribs 13a, 13b
Are formed to extend in the radial direction of the lever portion 13. Further, the outer peripheral side rib 13a and the inner peripheral side rib 13b are formed so as to be smoothly continuous. The output side, which is the back surface of the outer peripheral rib 13a, faces the inner peripheral end 2a of the clutch cover 2. The input side, which is the back side of the inner peripheral side rib 13b, is a damper portion 51 of the clutch disk assembly 51.
b. The damper portion 51b has a coil spring 51c for attenuating torsional vibration, and has a shape protruding in the axial direction as compared with other portions of the damper disk assembly 51.

Next, the operation will be described. When the clutch is connected, the inner peripheral end of the lever portion 13 of the diaphragm spring 8 is free with respect to the release device.
In this state, the pressing portion 11 presses the pressure plate 3 toward the flywheel 50. Therefore, the clutch disk assembly 51 is
And the flywheel 50. As a result, the clutch disk assembly 51 rotates integrally with the flywheel, and the torque from the flywheel is transmitted to the clutch disk assembly.

At this time, the portion of the diaphragm spring 8 on the support portion 12 side of the lever portion 13 is close to the inner peripheral end 2a of the clutch cover 2. However, the outer peripheral side rib 13a
Is formed on the surface opposite to the clutch cover 2, so that interference between the outer peripheral side rib 13 a and the clutch cover 2 can be avoided. At the time of release, the distal end on the inner peripheral side of the lever portion 13 of the diaphragm spring 8 is driven by the release device and turns to the input side. Then, the pressing portion 1
Numeral 1 turns to the output side with the support portion 12 as a fulcrum, and the pressure plate 3 moves to the output side following the pressing portion 11. As a result, the pressure plate 3 separates from the clutch disc assembly 51 and the flywheel 50,
The connection of the clutch is released, and the torque from the flywheel 50 is cut off.

At this time, the lever portion 13 of the diaphragm spring 8 approaches the damper portion 51b of the clutch disc assembly 51. However, since the inner circumferential rib 13b is formed on the surface opposite to the damper portion 51b, interference between the inner circumferential rib 13b and the damper portion 51b can be avoided. If such a diaphragm spring 8 is employed in the clutch device, the deformation of the diaphragm spring 8 during the operation of the clutch can be suppressed, so that the disengagement of the clutch can be maintained. Loss can be suppressed.

[Other Embodiments] (a) In the above embodiment, the diaphragm spring is
Although the case where the present invention is applied to a push type clutch device is considered, the present invention can also be applied to a pull type clutch device. In this case, the diaphragm spring includes a support portion, a pressing portion, and a lever portion in this order from the outer peripheral side, and the moving directions of the lever portion and the pressing portion when the clutch device operates are the same. Then, even with such a configuration, the inner peripheral side rib and the outer peripheral side rib can be provided in the lever portion as in the above-described embodiment. Therefore, the same effect as in the above embodiment can be obtained. (B) The diaphragm spring of the present invention can be applied to other clutch devices such as a twin clutch device.

[0026]

According to the present invention, the rib is formed on the surface of the lever portion opposite to the peripheral member, so that interference between the rib and the peripheral member can be avoided. Further, since the rib can be formed to extend in the axial direction, the rigidity of the diaphragm spring can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a clutch device including a diaphragm spring according to a first embodiment of the present invention.

FIG. 2 is a plan view of the diaphragm spring.

FIG. 3 is a partially enlarged view of the diaphragm spring.

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch cover assembly 2 Clutch cover 2a Inner peripheral end of clutch cover 3 Pressure plate 8 Diaphragm spring 11 Pressing part 12 Supporting part 13 Lever part 13a Outer peripheral side rib 13b Inner peripheral side rib 50 Flywheel 51 Clutch disk assembly 51b Damper part

Claims (4)

[Claims] 1. A clutch disc assembly mounted on a flywheel of a vehicle together with a clutch cover, and for pressing a clutch disassembly to the flywheel via a pressure plate in conjunction with a release device provided on a side opposite to the flywheel. An annular diaphragm spring, a pressing portion for pressing the pressure plate toward the flywheel side, a supporting portion supported by the clutch cover, and an inner peripheral side of the supporting portion, the extending portion being formed. A radially extending rib is formed, and a plurality of lever portions to which the release device can abut are provided at an inner peripheral end portion, and the rib of the lever portion has a surface on the flywheel side on the support portion side. And a diaphragm spring formed on the inner peripheral side on the surface on the release device side. 2. The diaphragm spring according to claim 1, wherein a rib formed on the support portion side of the lever portion faces a part of the clutch cover. 3. The clutch disk assembly has a damper portion including a torsion spring, and a rib formed on an inner peripheral side of the lever portion faces the damper portion. The diaphragm spring described in the above. 4. A clutch cover assembly for pressing a clutch disc assembly against a flywheel, comprising: a clutch cover fixed to the flywheel so as to be able to rotate integrally with the flywheel; A clutch cover assembly comprising: a pressure plate movably mounted in a direction; and the diaphragm spring according to claim 1 supported by the clutch cover.