JP2548152Y2 - Clutch cover assembly - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch cover assembly, and more particularly, to a clutch cover assembly having a mechanism for automatically adjusting a supporting height of a diaphragm spring according to a wear amount of a friction member.

[0002]

2. Description of the Related Art A clutch cover assembly is mounted on a flywheel of an engine, and is used to transmit a driving force of the engine to a transmission by sandwiching a clutch disk between the clutch cover and the flywheel. Such clutch cover assemblies and clutch discs are required to have a long service life. Therefore, in the clutch disc, the facing is fixed to the cushioning plate without using rivets or the like to increase the effective thickness of the facing.

[0003] In the clutch cover assembly, as shown in JP 63-27092 5 discloses an automatically set load of the initial of the diaphragm spring in accordance with the wear amount when the facing is worn Something that can be maintained is provided. In this clutch cover assembly, as shown in FIG. 7, a ring-shaped groove 2 is formed in a pressure plate 1, and a wear adjusting mechanism 3 is arranged in the groove 2. Wear adjustment mechanism 3
Are an outer peripheral side fulcrum ring 5 and an inner peripheral side fulcrum ring 6 which support the outer periphery of the diaphragm spring 4.
And slide keys 7, 8 arranged between each of the fulcrum rings 5, 6 and the bottom of the groove 2. Each of the slide keys 7 and 8 has an inclined surface such that its height decreases as it goes outward in the radial direction of the pressure plate 1, and the corresponding surface of the fulcrum rings 5 and 6 is also provided on each slide key. It has a corresponding inclined surface. The slide keys 7, 8 are urged radially outward by springs 9, 10, respectively.

In the clutch cover assembly having such a wear adjusting mechanism 3, when the facing 11 of the clutch disk is worn, the inner fulcrum ring 6 protrudes toward the diaphragm spring 4 by the spring 10 and the slide key 8 according to the amount of wear. I do. The outer fulcrum ring 5 is protruded at the time of release by an amount corresponding to the inner fulcrum ring 6 protruding, so that the initial set load of the diaphragm spring can be automatically maintained.

[0005]

In the wear adjusting mechanism disclosed in the above publication, the two fulcrum rings 5 and 6 are made to protrude toward the diaphragm spring 4 by moving the slide keys 7 and 8 outward in the radial direction. Wear adjustment is being performed. For this reason, when the engine speed increases, the slide keys 7, 8 move radially outward due to centrifugal force, and the two fulcrum rings 5, 6 project even though the facing is not worn. There is a problem that the correspondence between the amount of wear and the amount of protrusion of the fulcrum rings 5 and 6 is not accurate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a clutch cover capable of moving a support portion of a diaphragm spring in accordance with a wear amount without being affected by an engine speed, and automatically maintaining an initial set load for a long period of time. An object is to provide an assembly.

[0007]

A clutch cover assembly according to the present invention includes a clutch cover connected to an input-side rotating body, a pressure plate, a diaphragm spring, a first support ring, and a second support ring. , A ramp,
A first tension spring and a second tension spring are provided. The pressure plate is arranged in the clutch cover, and has a pressing surface on one side for holding a friction member between the pressure plate and the input-side rotating body, and has a circumferential groove on the other side. The diaphragm spring is arranged between the other side of the pressure plate and the clutch cover,
This is for pressing the pressure plate toward the input side rotating body. The first support ring is for the pressure plate
Axially and circumferentially movable on the inner side of the groove
Outside the diaphragm spring
It has a first support that supports the circumference, and is inclined in the circumferential direction toward the groove.
It has the 1st inclined surface which does. The second support ring is
Move axially and circumferentially to the outer peripheral side in the groove of the cover plate
Arranged freely, with diaphragms protruding from the groove
A second support portion for supporting the outer periphery of the coupling;
A second inclined surface inclined in the direction, and a groove in the first support ring.
Abutting from the side, the movement in the axial direction is restricted. Inclined part
Is formed in the groove and contacts the first inclined surface and the second inclined surface
Having a third inclined surface. The first urging member has grooves at both ends.
The first support ring is fixed to the first support ring and is circular.
Energize in the circumferential direction. Here, the first support ring has the first inclination.
Axially protrudes from the groove due to wedge action between the surface and the third inclined surface
Biased in the direction. The second urging member has grooves at both ends.
And the second support ring is connected to the second support ring in the circumferential direction.
Energize. Here, the second support ring has the second inclined surface and the second support ring.
A direction that protrudes axially from the groove due to wedge action with three inclined surfaces
Has been energized.

[0008]

In the clutch cover assembly according to the present invention, friction
When a member is worn, the sharpness is adjusted according to the amount of wear.
The rate moves to the input side rotating body side. Then, the first support
The first support of the ring and the outer periphery of the diaphragm spring
And a gap corresponding to the amount of wear is left. 1st support ring
Is urged by the first urging member, and the first inclined surface becomes the third inclined surface.
Slide on the surface. As a result, the first support ring is
Axial direction until it contacts the outer periphery of the diaphragm spring
Go to Subsequently, when the release operation is performed, the diaphragm
The outer peripheral portion of the spring is the second support portion of the second support ring
Away in the axial direction. As a result, the second support ring
The second inclined surface is urged by the urging member to slide on the third inclined surface.
You. As a result, the second support ring comes into contact with the first support ring
Move in the axial direction until Thus, the first supporting phosphorus
And the second support ring move in the axial direction according to the amount of wear
The initial position of the diaphragm spring
Is maintained. As a result, the diaphragm spring
, The initial set load is maintained.

Here, the first support ring and the second support ring
Are movable in the axial and circumferential directions.
The second biasing member rotates the two support rings so as to project toward the diaphragm spring. Therefore,
Unlike the conventional structure in which the slide key is moved in the radial direction to protrude the support member, the support member does not protrude toward the diaphragm spring due to centrifugal force, and the amount of protrusion is accurately set according to the amount of wear. Become.

[0010]

1 and 2 show a clutch assembly according to an embodiment of the present invention. In these figures, a clutch cover assembly includes a clutch cover 20 fixed to a flywheel on the engine side, a pressure plate 21 disposed in the clutch cover 20, and a pressure plate 21 for pressing the pressure plate 21 toward the flywheel. It mainly has a diaphragm spring 22.

The pressure plate 21 is provided on the flywheel side (left side in FIG. 2) with a pressing surface 2 for holding the clutch disk facing 23 between the flywheel and the flywheel.
1a is formed. In addition, diaphragm spring 2
A ring-shaped groove 21b is formed on the two side surfaces. The pressure plate 21 is attached to the clutch cover 20 by a strap plate 24 so as to be movable in the axial direction.

The diaphragm spring 22 is arranged concentrically with the clutch cover 20, and has a radially intermediate portion supported by a stud pin 25 and a wiring 26. Here, the wiring 26 serves as an operating fulcrum of the diaphragm spring 22. As shown in an enlarged manner in FIG. 3, inside the groove 21 b of the pressure plate 21, an inner fulcrum ring 27 (first support rib) as a support member for supporting the outer periphery of the diaphragm spring 22 is provided.
Ring ) and the outer fulcrum ring 28 (second support ring ).
G) and are arranged. Each fulcrum ring 27,
Numerals 28 are movable in the circumferential direction and the axial direction, respectively, in the groove 21b.

The inner fulcrum ring 27 has a groove 21b.
And a support portion 27b (first support portion) that protrudes radially outward from the base portion 27a and protrudes toward the diaphragm spring 22 side. At the bottom of the base 27a, as shown in FIG. 4, four inclined portions 27c (the
(One inclined surface) are formed at equal intervals. FIG. 4 is an expanded cross-sectional view of the groove 21b. Inclined part 27
c, the tapered block 2 is provided at the bottom of the groove 21b.
9 (inclined portion) is fixed by a pin 30. The tapered block 29 has an inclined surface 29a (third inclined surface) corresponding to the inclined portion 27c of the inner fulcrum ring 27. Base 27a of inner fulcrum ring 27 and groove 2
1b, a space is formed between the bottom and the bottom of the inner ulcrum ring 27 in this space.
A first tension spring 31 is disposed. One end of the first tension spring 31 has a screw 3 fixed to the bottom of the groove 21b.
2 and the other end is locked by a screw 33 fixed to the inner fulcrum ring 27. In this way,
The inner fulcrum ring 27 is always urged along the inclined surface 29a of the tapered block 29 in a direction to protrude from the groove 21b toward the diaphragm spring 22.

The outer fulcrum ring 28 is
1b, and a support portion 28b (second support portion) protruding toward the diaphragm spring 22 side. This outer fulcrum ring 28
The movement of the inner fulcrum ring 27 in the axial direction is restricted by the side surface 27d on the flywheel side of the support portion 27b of the inner fulcrum ring 27.
The tips of the support portions 7 and 28 are located substantially in the same vertical plane. Base 2 of outer fulcrum ring 28
8a, on the lower surface, like the inner fulcrum ring 27,
It has two inclined portions 28c ( second inclined surfaces) . The inclined portion 28c is inclined along the circumferential direction, and is in surface contact with the inclined surface 29a of the tapered block 29. Further, a space is formed between the outer fulcrum ring 28 and the groove 21b, and a second extension spring 34 is disposed in this space. One end of the second tension spring 34 is formed in the groove 21b.
The other end is engaged with a screw (not shown) fixed to the outer fulcrum ring. In this manner, the outer fulcrum ring 28 is constantly urged along the inclined surface 29 a of the tapered block 29 in a direction to protrude toward the diaphragm spring 22.

Here, the inclined surface 29 of the tapered block 29
The inclination of a is set at an inclination angle such that the fulcrum rings 27 and 28 do not rotate under an axial pressing load. The pressure plate 21 and both fulcrum rings 27 and 28 are provided with holes (not shown) penetrating in the radial direction, and these holes are used for positioning in the circumferential direction when the clutch cover assembly is assembled. Pin 36
By inserting the fulcrum rings 27 and 28 (see FIG. 1), the heights of the two fulcrum rings 27 and 28 in the axial direction are set.
In use, the pin 36 is removed.

Next, the operation will be described. FIG. 3 shows an initial set state, in which both fulcrum rings 27,
The supporting portions 27b, 28b of 28 are in contact with the outer peripheral portion of the diaphragm spring 22. When the outer peripheral end of the diaphragm spring 22 is moved rightward in the drawing as shown by the dashed line in FIG. 2 by the release operation, the entire pressure plate 21 is moved in the same direction by the strap plate 24, and the facing 23 of the pressure plate 21 is Pressing is released.

As shown in FIG. 5, when the clutch 23 is worn due to the use of the clutch, when the clutch 23 is engaged, the diaphragm spring 22 assumes a posture such that the outer peripheral end thereof is inclined toward the pressure plate 21 side. . Thus, the inner fulcrum ring 27 is in a state where it can protrude toward the diaphragm spring 22. The inner fulcrum ring 27 is always urged by the first tension spring 31 and the tapered block 29 in the direction in which it protrudes toward the diaphragm spring 22, so that the wear of the facing 23 causes the diaphragm spring 22 to wear.
5, the inner fulcrum ring 27 rotates in response to this, and projects toward the diaphragm spring 22 along the inclined surface 29a of the tapered block 29. In this state, as shown in FIG. 5, there is a gap between the inner fulcrum ring 27 and the outer fulcrum ring 28 according to the amount of wear.

Next, when the release operation is performed from the state shown in FIG. 5, the diaphragm spring 22 assumes the posture shown in FIG. 6, and the pressure plate 21 is moved toward the diaphragm spring 22 by the strap plate 24. Thereby, the pressure plate 21 moves by the reaction force of the strap plate 24. The reaction force of the strap plate 24 acts on the diaphragm spring 22 via the inner fulcrum spring 27, and the outer fulcrum spring 28 becomes unloaded. The outer fulcrum ring 28 is always fixed to the diaphragm spring 2 by the second tension spring 34 and the tapered block 29.
As described above, when the outer fulcrum ring 28 is unloaded by the release operation as described above, the outer fulcrum ring 28 moves along the inclined surface 29 a of the tapered block 29 toward the diaphragm spring 22. Go to 6 in which the outer fulcrum ring 28 is in contact with the inner fulcrum ring 27.
The movement of the outer fulcrum ring 28 is restricted in the state shown in FIG. In this way, both fulcrum rings 2
7 and 28, the positions of the support portions 27b and 28b are substantially in the same plane.

Next, when the release operation is released, the diaphragm spring 22 assumes the posture shown in FIG. 2 and is maintained at the initial set load. In this manner, the two fulcrum rings 27 and 2 are changed according to the amount of wear of the clutch disk.
8 protrudes toward the diaphragm spring 22, and the diaphragm spring 22 is always maintained at the initial set load. For this reason, the facing can be sufficiently used up to the wear limit amount, the period until the clutch replacement is extended, and the life can be extended. Further, since the set load can always be maintained at a constant value during the use period, the torque transmission performance of the clutch does not change. For the same reason, the release operation can always be performed with the same release load without changing the release characteristics.

Further, since the two fulcrum rings 27 and 28 are configured to project in the axial direction by their own rotation, the fulcrum rings do not project due to centrifugal force unlike the conventional structure. Therefore, the fulcrum ring can be accurately projected by an amount corresponding to the wear amount without being affected by the rotation speed, and the diaphragm spring 22 can be maintained at the initial set load.

Also, the first and second tension springs 31, 3
4. Both ends of both fulcrum rings 27 and 28 are attached to each member.
Fixed and pulled in the circumferential direction,
Reliable biasing of the two members can be realized with a simple structure. [Other Embodiments] (a) In the above-described embodiment, the ring-shaped groove 21b is formed in the pressure plate 21 and the fulcrum rings 27 and 28 are provided over the entire circumference, but the groove is formed intermittently. A plurality of fulcrum rings may be inserted into these grooves. (B) In the above embodiment, the taper block 29 is fixed in the groove 21b of the pressure plate 21 by the pin 30. However, the taper block 29 may be formed integrally with the pressure plate 21.

[0022]

[Effects of the Invention] As described above, in the present invention, it is possible to perform adjustment according to the amount of wear without being affected by the rotation speed.
The initial set load of the diaphragm spring can be automatically maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a partial front view of a clutch cover assembly according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional configuration diagram of the clutch cover assembly.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a developed sectional view of a wear adjusting mechanism.

FIG. 5 is a diagram illustrating the operation of a wear adjustment mechanism.

FIG. 6 is a diagram illustrating the operation of the wear adjustment mechanism.

FIG. 7 is a partial cross-sectional configuration diagram of a clutch cover assembly provided with a conventional wear adjustment mechanism.

DESCRIPTION OF SYMBOLS 20 Clutch cover 21 Pressure plate 21a Pressing surface 21b Groove 22 Diaphragm spring 23 Clutch disk 27 Inner fulcrum ring 28 Outer fulcrum ring 29 Tapered block 31 First tension spring 32 Second tension spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A clutch cover connected to an input-side rotating body, and a pressing surface arranged in the clutch cover and having a pressing surface for clamping a friction member between the input-side rotating body and one side. An annular pressure plate having a circumferential groove on the other side surface; and a diaphragm spring disposed between the other side surface of the pressure plate and the clutch cover for pressing the pressure plate toward the input side rotating body. An axial direction and a circle on the inner peripheral side in the groove of the pressure plate.
A portion that is movably arranged in the circumferential direction and protrudes from the groove
First support for supporting the outer periphery of the diaphragm spring
A first inclined surface that has a portion and is inclined in the circumferential direction toward the groove side.
A first support ring having an axial direction and a circle on an outer peripheral side in a groove of the pressure plate;
A portion that is movably arranged in the circumferential direction and protrudes from the groove
Second support for supporting the outer periphery of the diaphragm spring
Part, and a second inclined surface inclined in the circumferential direction on the groove side.
Having an axial direction in contact with the first support ring from the groove side.
A second support ring, which is restricted from moving to the first surface, and the first and second inclined surfaces formed in the groove.
An inclined portion having a third inclined surface that abuts on the first and second ends , and both ends are fixed to the groove and the first support ring.
1 urge the support ring in the circumferential direction, whereby the first
A support ring is formed between the first inclined surface and the third inclined surface.
Urged in the direction that projects axially from the groove
A first urging member, both ends of which are connected to the groove and the second support ring.
2 to urge the support ring in the circumferential direction, whereby the second
A support ring is formed between the second inclined surface and the third inclined surface.
Biased in the circumferential direction that protrudes axially from the groove
And a second biasing member .