JP2002242952A - Multi-plate clutch for automobile - Google Patents

Abstract

(57) [Problem] To provide a large spring load in a narrow space between a pressure plate and an intermediate plate with a simple configuration, and to stably regulate the connection order of two clutch disks. SOLUTION: In the multi-plate clutch 10 for an automobile,
A pressure regulating plate including a maximum distance regulating member for regulating a maximum distance between the pressure plate and the intermediate plate; and a coil spring provided between the pressure plate and the intermediate plate in a pre-compressed state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a multi-plate clutch for an automobile.

[0002]

2. Description of the Related Art Conventionally, as a multi-plate clutch for automobiles,
In a multi-plate clutch for an automobile interposed between a flywheel and an input shaft of a transmission, a clutch cover fixed via a plurality of columns provided at a plurality of positions on an outer peripheral portion of the flywheel and a clutch cover arranged inside the clutch cover. A pressure plate that is movably engaged with the column in the axial direction of the column, and a pressure plate that is disposed on the flywheel side of the pressure plate inside the clutch cover and that is movable in the axis direction of the column. An intermediate plate engaged with the input shaft and a flywheel and the intermediate plate inside the clutch cover, and between the intermediate plate and the pressure plate. Two clutch discs engaged so as to be integrally rotatable, and an operation for pressurizing the pressure plate toward the flywheel. It is made and a member. In this multi-plate clutch, by applying the pressing force applied by the operating member to the flywheel side from the pressure plate, the clutch disk and the intermediate plate are sandwiched between the pressure plate and the flywheel, and they are pressed against each other. , Transmitting the rotational force of the flywheel to the input shaft of the transmission.

[0003] The present applicant has disclosed in Japanese Patent Application No.
In order to regulate the connection order of the clutch disks, a plate spring is provided between the flywheel and the intermediate plate and between the intermediate plate and the pressure plate.

[0004]

However, the prior art has the following problems. Due to the mounting positions of the pressure plate and the intermediate plate to which the leaf spring is attached, when the leaf spring is bent, the leaf spring comes into sharp contact with the corners of those plates and is broken starting from the contact portion. There is a fear.

[0005] It is difficult to secure a necessary and sufficient large spring load due to the leaf spring accommodated in the narrow space between the pressure plate and the intermediate plate.

An object of the present invention is to secure a large spring load in a narrow space between a pressure plate and an intermediate plate with a simple configuration, and to stably regulate a connection order of two clutch disks.

[0007]

According to a first aspect of the present invention, there is provided a clutch interposed between a flywheel and an input shaft of a transmission, and fixed via a plurality of columns provided at a plurality of positions on an outer peripheral portion of the flywheel. A cover, a pressure plate disposed inside the clutch cover and movably engaged with the column in the axial direction of the column, and a pressure plate disposed inside the clutch cover on the flywheel side of the pressure plate. An intermediate plate movably engaged with the support column in the axial direction of the input shaft, and an intermediate plate disposed between the flywheel and the intermediate plate and between the intermediate plate and the pressure plate inside the clutch cover; Clutch plate that is rotatably engaged with the input shaft so that it can move freely in the direction, and the pressure plate can be pressed toward the flywheel. A multi-plate clutch for an automobile having an operating member to perform, a maximum distance regulating member for restricting a maximum distance between the pressure plate and the intermediate plate, and a coil spring pre-compressed and provided between the pressure plate and the intermediate plate. Is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the maximum spacing regulating member comprises a plurality of bolts screwed into a plurality of circumferential positions of one of the pressure plate and the intermediate plate. Is inserted loosely into holes provided at a plurality of positions in the circumferential direction of the other one of the pressure plate and the intermediate plate, and the head thereof is axially engaged with the other plate. According to a third aspect of the present invention, in the first or second aspect of the present invention, both ends of the coil spring are accommodated in opposing concave portions provided at corresponding positions at a plurality of circumferential positions of the pressure plate and the intermediate plate. The coil spring is placed over a bolt protruding from one of the pressure plate and the intermediate plate toward the other.

[0009]

According to the first aspect of the present invention, the following effects are obtained. A coil spring is interposed between the pressure plate and the intermediate plate. The coil spring does not come into contact with the corners of those plates, and there is no risk of breakage.

The coil spring can secure a large spring load in a narrow space between the pressure plate and the intermediate plate as compared with the leaf spring.

By regulating the maximum distance between the pressure plate and the intermediate plate by the maximum distance regulating member,
A large preload (preload) can be applied to the coil spring between the pressure plate and the intermediate plate. Thereby, the first clutch disc between the flywheel and the intermediate plate can be connected to the flywheel and the intermediate plate first, and the first clutch disc can be connected to the flywheel and the intermediate plate with a high load. Can be crimped.

As described above, the half-clutch region of the clutch can be expanded, and the engagement position of the clutch can be optimized, and as a result, the operability of the clutch can be improved.

According to the second aspect of the invention, the following operations are provided. When the head of the bolt constituting the maximum gap regulating member is to be engaged with the intermediate plate, the head of the bolt can be brought into contact with the flywheel when the clutch disc wears out. It is possible to warn of the time to replace the clutch disk by the abnormal noise of the contact or the like.

The position of the pressure plate and the intermediate plate in the circumferential direction can be regulated by the bolts constituting the maximum gap regulating member, and the play which tends to occur in the circumferential direction of the plates can be suppressed.

According to the third aspect of the invention, the following effects are obtained. Both ends of the coil spring were housed in the opposing recesses of the pressure plate and the intermediate plate, and the coil spring was placed on the bolt protruding from one of the pressure plate and the intermediate plate toward the other. Accordingly, the displacement can be prevented, and the spring force of the coil spring can be stably transmitted to the pressure plate and the intermediate plate.

[0016]

FIG. 1 is a sectional view showing a connected state of a multi-plate clutch, FIG. 2 is a sectional view showing a half-clutch state of the multi-plate clutch, FIG. 3 is a sectional view showing a disconnected state of the multi-plate clutch, FIG. 4 is a front view of FIG.

As shown in FIGS. 1 and 4, the multi-plate clutch 10 for an automobile transmits the rotational force of the engine to the input shaft 12 of the transmission. Interposed between

A clutch cover 14 is fixed to a plurality of columns 13 at equal positions in the circumferential direction of the outer peripheral portion of the flywheel 11. That is, the flywheel 11 and the support 1
The clutch cover 3 and the clutch cover 14 are fixed so as to be integrally rotatable by bolts 15. A diaphragm spring 17 for generating a pressing force toward the flywheel 11 is attached to the clutch cover 14 by an attachment member 16, and an inner peripheral end face 17 </ b> A of the diaphragm spring 17 is provided with a release device 40 (operation member) to be described later. The retainer 44 contacts the flywheel 11 side, the outer peripheral end face 17B contacts the pivot ring 16A of the mounting member 16 on the transmission side, and the intermediate portion near the outer periphery contacts the pressure plate 21 described later. This allows the diaphragm spring 17 to press the pressure plate 21 toward the flywheel 11. In addition, mounting member 1
6 is a pivot ring 16A, a fixture 16B, a nut 1
6C. The pivot ring 16 </ b> A is a steel ring, is in contact with the outer peripheral end face 17 </ b> B of the diaphragm spring 17, and serves as a fulcrum of the diaphragm spring 17.

Inside the clutch cover 14, a projection 2 which is in contact with the outer peripheral end face 17B of the diaphragm spring 17 is provided.
The pressure plate 21 provided with 1B is provided. The pressure plate 21 is provided with a plurality of concave portions 2
1A (not shown).
3 so as to be freely movable in the axial direction and engageable with the column 13.

Inside the clutch cover 14, an intermediate plate 22 is provided on the flywheel 11 side from the pressure plate 21. Similarly to the pressure plate 21, the intermediate plate 22 has concave portions 22A (not shown) at a plurality of positions on the outer periphery in the circumferential direction. The concave portions 22A are engaged with the columns 13 so as to be movable in the axial direction of the support shaft 13. It is possible.

The input shaft 12 of the transmission extends to the inside of the clutch cover 14 and the flywheel 11
The inner peripheral boss of the clutch hub 30 is spline-coupled to the input shaft 12 between the diaphragm spring 17 and the input shaft 12. The outer peripheral boss of the clutch hub 30 is provided with external teeth 30 </ b> A with which a plurality of clutch disks 31, 32 described later are movably engaged in the axial direction. Clutch hub 30
Is also provided with an air circulation hole 30B.

Inside the clutch cover 14, between the flywheel 11 and the intermediate plate 22, and between the pressure plate 21 and the intermediate plate 22, clutch disks 31 and 32 are provided. The clutch disks 31, 32 are spline-coupled to the external teeth 30A of the clutch hub 30, and as a result, are engaged with the input shaft 12 so as to be movable in the axial direction and rotatable integrally with the input shaft 12. A friction material 31A (32A) is adhered to both sides of the clutch disk 31 (same for 32).

A retaining member 34 such as a C-ring or a circlip is mounted in a ring groove provided on an outer peripheral portion of the clutch hub 30. The retaining groove 34 is engaged with a ring groove of an annular positioning member 35. I have. The positioning member 35
Clutch discs 31, 32 for clutch hub 30
The range of movement in the axial direction is regulated.

In the release device 40, a collar 41 coaxially covered with the input shaft 12 is fixed to a cover (not shown) of the transmission, and an outer race 42A of a release bearing 42 can slide on the collar 41 in the axial direction. And the release lever 43 is engaged with the outer race 42A. When the release lever 43 is moved in the axial direction by a hydraulic cylinder (not shown) that is operated by operating the clutch, the release bearing 42 is moved in the axial direction. The release bearing 42 is provided with an inner race 42B and a collar 41.
And a ball 42C (not shown) between the outer race 42A and the inner race 42B. In the release device 40, the inner race 42B of the release bearing 42 and the diaphragm spring 17 are connected by a retainer 44. A flange-shaped spring engaging portion 44A is provided on an outer peripheral portion of the retainer 44, and a C-ring 45 is engaged. 17A, a wave washer 46 and a washer 47 are sandwiched. The wave washer 46 is moved by the spring force of the diaphragm spring 1.
The inner peripheral end face 17A of the retainer 7 is engaged with the spring engaging portion 44A of the retainer 44 without vibration.

However, in the case of the multiple disc clutch 10, the bolt 5 serving as the maximum gap regulating member 50 for regulating the maximum gap between the pressure plate 21 and the intermediate plate 22 is used.
One. That is, the concave portion 52 and the female screw portion 52A are provided at each of a plurality of circumferential positions (three positions in the present embodiment) which are symmetrical on the circumference of the pressure plate 21, and the bolt 5
The screw 51A is screwed into the female screw 52A of the pressure plate 21, and the middle portion of the bolt 51 at the front end is fitted to the recess 52 of the pressure plate 21 by spigot-joining or the like. The base-side intermediate portion is loosely inserted into the bolt insertion hole 53 of the intermediate plate 22, and its head 51 </ b> B is axially engaged with the surface of the intermediate plate 22.

A plurality of pre-compressed coil springs 60 are provided at a plurality of circumferentially symmetrical positions (in the present embodiment, nine positions) between the pressure plate 21 and the intermediate plate 22 symmetrically on the circumference. Opposite concave portions 61 and 62 provided at corresponding positions at the plurality of circumferential positions of the pressure plate 21 and the intermediate plate 22 are provided at both ends of the coil spring 60.
And a coil spring 60 is put on a bolt 63 which is screwed coaxially with the concave portion 62 of the intermediate plate 22 and protrudes toward the pressure plate 21.

The operation of the multi-plate clutch 10 will be described below. (1) Clutch connection operation (FIGS. 1 and 2) When the retainer 44 moves to the flywheel 11 side by the release device 40, the pressing force of the diaphragm spring 17 presses the pressure plate 21 toward the flywheel 11 side. The clutch connection operation is performed.

The order of connecting the clutches is as follows. Diaphragm spring 17 is pressure plate 2
1 and the intermediate plate 22 are pushed, and the intermediate plate 22 pushes the first clutch disc 31.

At this time, the second clutch disc 3
No. 2 forcibly provides a clearance between the pressure plate 21 and the intermediate plate 22 by the spring force of the coil spring 60 so that they are not pressed against each other.

At the same time, the spring force (preload) of the coil spring 60 presses the first clutch disc 31 to the flywheel 11 via the intermediate plate 22 (half-clutch state in FIG. 2).

When the clutch disc 31 is completely pressed against the flywheel 11 by the spring force of the coil spring 60, the coil spring 60 is compressed and deformed by the pressure of the diaphragm spring 17, and two sheets are placed between the pressure plate 21 and the intermediate plate 22. The clutch disk 32 of the eye comes into pressure contact, and the clutch is completely connected (the connection state in FIG. 1).

The period from when the first clutch disc 31 is crimped to when the second clutch disc 32 is crimped is a half-clutch area.

(2) Clutch Disengagement Operation (FIG. 3) The release device 40 moves the retainer 44 away from the flywheel 11 and pulls the diaphragm spring 17 toward the transmission.
Diaphragm spring 17 is pressure plate 21
Is performed to release the pressing force applied to the clutch. Thereby, the transmission of the rotational force of the flywheel 11 to the input shaft 12 is cut off (cutting state in FIG. 3).

Therefore, according to the present embodiment, the following operations are provided. The coil spring 60 is interposed between the pressure plate 21 and the intermediate plate 22. The coil spring 60 does not come into contact with the corners of the plates 21 and 22, and there is no risk of breakage.

The coil spring 60 can secure a large spring load in a narrow space between the pressure plate 21 and the intermediate plate 22 as compared with the leaf spring.

By regulating the maximum distance between the pressure plate 21 and the intermediate plate 22 by the maximum distance regulating member 50, the pressure plate 21 and the intermediate plate 2 are controlled.
A large preload (preload) can be applied to the coil spring 60 between the two. As a result, the first clutch disc 31 between the flywheel 11 and the intermediate plate 22 can be connected to the flywheel 11 and the intermediate plate 22 first, and the first clutch disc 31 can be connected with a high load. It can be pressed against the flywheel 11 and the intermediate plate 22.

As described above, the area of the half clutch 10 of the clutch 10 can be enlarged, and the connection position of the clutch 10 can be made appropriate, and as a result, the operability of the clutch 10 can be improved.

When the head 51B of the bolt 51 constituting the maximum gap regulating member 50 is to be engaged with the intermediate plate 22, when the clutch disk 31 becomes worn, the head 51B of the bolt 51 is removed. Flywheel 11
Can be warned that the time for replacement of the clutch disk 31 has come due to the abnormal noise of the contact or the like.

The pressure plate 21 and the intermediate plate 22 are bolted by bolts 51 constituting the maximum distance regulating member 50.
Can be restricted in the circumferential direction, and the play which tends to occur in the circumferential direction of the plates can be suppressed.

Both ends of the coil spring 60 are formed by opposing concave portions 61 and 6 of the pressure plate 21 and the intermediate plate 22.
2, and the coil spring 60 is placed on the bolt 63 projecting from one of the pressure plate 21 and the intermediate plate 22 toward the other, so that the coil spring 60 is prevented from being displaced with the rotation of the clutch 10. Then, the spring force of the coil spring 60 is
To the intermediate plate 22 in a stable manner.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific structure of the present invention is not limited to the embodiments, and the design may be changed without departing from the scope of the present invention. The present invention is included in the present invention. For example, the maximum gap regulating member is not limited to a bolt.

[0042]

As described above, according to the present invention, with a simple structure, a large spring load is secured in a narrow space between the pressure plate and the intermediate plate, and the connection order of the two clutch disks is stably regulated. can do.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a connected state of a multi-plate clutch.

FIG. 2 is a sectional view showing a half-clutch state of the multi-plate clutch.

FIG. 3 is a sectional view showing a disengaged state of the multi-plate clutch.

FIG. 4 is a front view of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Multi-plate clutch 11 Flywheel 12 Input shaft 13 Support 14 Clutch cover 21 Pressure plate 22 Intermediate plate 31, 32 Clutch disk 50 Maximum gap regulating member 51 Bolt 51B Head 60 Coil spring 61, 62 Depression 63 Bolt

Claims (3)

[Claims] 1. A clutch cover interposed between a flywheel and an input shaft of a transmission, the clutch cover being fixed through a plurality of columns provided at a plurality of positions on an outer peripheral portion of the flywheel, and a clutch cover disposed inside the clutch cover. A pressure plate which is movably engaged with the support in the axial direction of the support, and which is disposed on the flywheel side of the pressure plate inside the clutch cover, and is engaged with the support movably in the axial direction of the support. An intermediate plate to be fitted, a flywheel and an intermediate plate inside the clutch cover, and an intermediate plate and a pressure plate. The input plate is integrally rotatable with the input shaft so as to be movable in the axial direction of the input shaft. Self-contained, comprising a clutch disc capable of being engaged, and an operating member capable of pressing the pressure plate toward the flywheel. A multi-plate clutch for a vehicle, comprising: a maximum distance regulating member for restricting a maximum distance between a pressure plate and an intermediate plate; and a coil spring pre-compressed between the pressure plate and the intermediate plate. Multi-plate clutch for automobiles. 2. The maximum distance regulating member comprises a plurality of bolts which are screwed into a plurality of circumferential positions of one of the pressure plate and the intermediate plate, and each bolt is formed in a circumferential direction of the other one of the pressure plate and the intermediate plate. 2. The multi-plate clutch for an automobile according to claim 1, wherein the head is loosely inserted into holes provided at a plurality of positions and its head is axially engaged with the other plate. 3. Both ends of the coil spring are respectively accommodated in opposing concave portions provided at corresponding positions in a plurality of circumferential positions of the pressure plate and the intermediate plate, and the one end of the pressure plate and the intermediate plate is disposed in the other. The multi-plate clutch for an automobile according to claim 1 or 2, wherein a coil spring is covered on a bolt protruding toward the coil.