JPH1019056A - Friction member and clutch disk assembled body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten the weight of a clutch disk assembled body and reduce the number of part items by eliminating rivets for a friction member in the friction member and the clutch disk assembled body using the member. SOLUTION: A friction member is used of a clutch disk assembled body and is provided with a cushioning plate 16 and a pair of friction facings 15. The cushion plate 16 has an inserting and securing section 16g formed faced to the outside in the axial direction from both sides, which is formed by burring process. The friction facings 15 have a hole 15a corresponding to the inserting and securing section 16g and are fixed on both sides of the cushioning plate 16 by the inserting and securing section 16g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction member and a clutch disk assembly using the same.

[0002]

2. Description of the Related Art A clutch disk assembly is for transmitting a torque between an input side rotating body and an output side rotating body, and generally includes a friction member and an input member in which the friction member is fixed to an outer peripheral portion. A side plate, an output side hub, and an elastic member for elastically connecting the input side plate and the output side hub in a circumferential direction. In this clutch disk assembly,
When the friction member is pressed against the engine-side flywheel by the pressure plate of the clutch cover assembly, the friction member is sandwiched between the flywheel and the pressure plate, and the torque of the engine-side flywheel is input to the input-side plate. . This torque is transmitted to the output side hub via the elastic member, and is output to the output side shaft.

As described above, the clutch is connected by transmitting the torque by pressing the friction member against the flywheel, and the torque is transmitted. In order to reduce the impact at the time of connecting the clutch, the friction member has a cushioning plate. The friction member includes the cushioning plate, a friction facing fixed to one surface of the cushioning plate and pressed against the flywheel, and a friction facing fixed to the other surface of the cushioning plate and pressed against the pressure plate. . The cushioning plate undergoes elastic deformation when the friction member is pressed against the flywheel. This elastic deformation acts as a cushion, and the shock at the time of clutch engagement is reduced.

[0004]

Conventionally, holes are provided in the cushioning plate and the pair of friction facings of such a friction member, and the cushioning plate and the pair of friction facings pass through these holes. Secured by rivets. However, it is desired to eliminate the rivet from the demand for reducing the weight of the friction member and the number of parts.

An object of the present invention is to eliminate the rivets of a friction member in a friction member and a clutch disk assembly using the same, thereby achieving a reduction in weight and a reduction in the number of parts.

[0006]

According to a first aspect of the present invention, there is provided a friction member for use in a clutch disk assembly, comprising a cushioning plate and a pair of friction facings. The cushioning plate has insertion portions formed by burring from both side surfaces toward the outside in the axial direction. The friction facing has holes corresponding to the insertion portions, and is fixed to the both sides of the cushioning plate by the insertion portions. Here, the burring process refers to a process of raising a columnar claw substantially perpendicular to the plate.

When the friction member is pressed against the flywheel on the engine side by the pressure plate of the clutch cover assembly, one friction facing is pressed against the flywheel and the other friction facing is pressed against the pressure plate. These friction facings and the cushioning plate are connected to each other by an insertion portion provided on the cushioning plate,
Relative rotation is not possible. Thus, the torque transmitted from the flywheel on the engine side to the two friction facings is transmitted to the cushioning plate, and further transmitted to the input side plate of the clutch disk assembly fixed to the inner peripheral portion of the cushioning plate.

When the friction member is pressed against the flywheel, that is, when the clutch is engaged, the cushioning plate is elastically deformed. This elastic deformation acts as a cushion, and the shock at the time of clutch engagement is reduced. Here, since the friction member is fixed by the insertion portion formed on the cushioning plate, rivets are not required.

A friction member according to a second aspect is the friction member according to the first aspect, wherein the cushioning plate is formed of spring steel. Further, the insertion portion is formed by burring after being subjected to annealing heat treatment, is inserted through the friction facing hole, and is bent at the distal end toward the outer periphery of the hole. Here, when a cushioning plate made of spring steel is machined, an annealing heat treatment is first performed so as to facilitate the machining.

[0010] A clutch disk assembly according to a third aspect includes the friction member according to the first or second aspect, an input-side plate, an output-side member, and a damper portion. A friction member is fixed to the outer peripheral portion of the input side plate.
The output side member is provided on the input side plate so as to be relatively rotatable within a predetermined angle range. The damper portion elastically connects the input side plate and the output side member in a circumferential direction.

The torque transmitted to the input side plate is transmitted to the output side hub via the elastic member and output.

[0012]

1 and 2 show a clutch disk assembly 1 according to an embodiment of the present invention. This clutch disc assembly 1 is a device for transmitting torque from a flywheel 31 on the engine side to a main drive shaft 32 on the transmission side. In FIG. 1, OO is the rotation axis of the clutch disk assembly 1.

At the center of the clutch disc assembly 1, a spline hub 2 connected to a main drive shaft 32 is disposed. The spline hub 2 has a spline hole 2a at the center thereof which meshes with spline teeth of a main drive shaft 32 (not shown).
The spline hub 2 is integrally formed with a flange 3 projecting outward.

The flange portion 3 has cutouts 3a for stop pins formed at predetermined intervals on the outer peripheral portion, and five window holes 3b are arranged on the inner peripheral side at equal intervals in the circumferential direction. I have. A torsion spring 4 is housed in each window hole 3b. A pair of generally disc-shaped retaining plates 6 and a clutch plate 7 are arranged on the outer peripheral side of the spline hub 2. The plates 6 and 7 are fitted to the spline hub 2 so as to be relatively rotatable. The retaining plate 6 and the clutch plate 7 are integrally connected at their outer peripheral portions by stop pins 8. The stop pin 8 is arranged in the notch 3 a for the stop pin of the flange portion 2.

A plurality of cushioning plates 16 are fixed to the outer periphery of the clutch plate 6 by rivets 9. A pair of friction facings 15 are arranged on both side surfaces of the cushioning plate 16. The friction facing 15 is fixed to a cushioning plate 16 as described later. The retaining plate 6 has a window hole 6a corresponding to the window hole 3a of the flange portion 3.
However, a window hole 7a is formed in the clutch plate 7. The window holes 6a and 7a are cut and raised so as to cover the torsion spring 4 from the outside, and house the torsion spring 4 therein.

Between the inner peripheral portion of the flange portion 3 and the inner peripheral portion of the retaining plate 6, an annular cone spring 11 and a friction plate 1 are arranged from the transmission side.
2 and a friction washer 13 are arranged. A friction washer 14 is arranged between the flange 3 and the inner peripheral portion of the clutch plate 7.
These friction washers 13 and 14 slide between the flange 3 and the plates 6 and 7 to generate a predetermined frictional force.

Next, the connection between the cushioning plate 16 and the friction facing 15 will be described with reference to FIG. The friction facing 15 has a hole 15a and a hole 15b. The diameter of the hole 15 a is small near the side surface in contact with the cushioning plate 16, and gradually increases from the vicinity of the center of the thickness of the friction facing 15 toward the outside in the axial direction.
A hole having a large diameter is formed near the side surface opposite to the sixth side.

The cushioning plate 16 is made of spring steel, and as shown in FIG.
And a cushioning portion 16b integrally formed with the fixed portion 16a. The cushioning portion 16b is an elastically deformable plate having a step in the circumferential direction. As shown in FIGS. 2 and 3, the first fixing portion 16c and the second fixing portion 16d are provided.
, A connecting portion 16e, and an inclined portion 16f. As shown in FIG. 3, the first fixing portion 16c and the second fixing portion 16d have an insertion portion 16g. First fixing part 1
6c is in contact with one friction facing 15 and is fixed to the friction facing 15 by an insertion portion 16g.
The second fixing portion 16d is in contact with the other friction facing 15, and is fixed to the other friction facing 15 by the insertion portion 16g. The insertion portion 16g is connected to the first fixing portion 16c.
The hole 1 of the friction facing 15 extends axially outward from the surface of the second fixing portion 16d in contact with the friction facing 15.
5a. This insertion portion 16
g is formed by performing burring after heat treatment of annealing, since the workability is not good if the cushioning plate 16 made of spring steel is processed as it is. Then, the cushioning plate 16 and the friction facing 15 are fixed by bending the distal end portion 16h of the insertion portion 16g in the outer peripheral direction in accordance with the inclination of the widening of the diameter of the hole 15a. In the bending process of the distal end portion 16h, the base is inserted through the hole 15b to receive the back surface side of the insertion portion 16g. Thereafter, the tip portion 16h is bent from the hole 15a side to the outer peripheral side of the hole 15a by a tool. The connecting portion 16e is connected to the first fixing portion 16c.
And the second fixing portion 16d. Slope 16f
Extend obliquely to both ends of each of the fixing portions 16c and 16d.

Next, the operation will be described. A pressure plate (not shown) presses the friction facing 15 toward the flywheel 31. When the friction facing 15 contacts the flywheel 31, the cushioning plate 16 is elastically deformed between the two friction facings 15 next. The shock at the time of clutch engagement is absorbed by the cushioning effect caused by this elastic deformation.

The friction facing 15 is a flywheel 3
1, the torque of the flywheel 31 is input to the friction facing 15. The torque is applied from the friction facing 15 via the cushioning plate 16
The power is transmitted to the clutch plate 7 and the retaining plate 6. This torque is transmitted to the flange portion 3 via the torsion spring 4 and is further output from the spline hub 2 to the main drive shaft 32.

[0021]

In the friction member according to the present invention, an insertion portion is formed on the cushioning plate, so that the rivet for joining the friction facing with the cushioning plate, which has been conventionally used, can be eliminated. Thus, the weight and the number of parts can be reduced in a clutch disk assembly using the same.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a clutch disk assembly according to an embodiment of the present invention.

FIG. 2 is a partially cutaway II view of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch disk assembly 2 Spline hub 4 Torsion spring 7 Clutch plate 15 Friction facing 16 Cushioning plate 16g Insertion part 31 Flywheel 32 Main drive shaft

Claims (3)

[Claims] 1. A friction member used in a clutch disk assembly, wherein the cushioning plate has insertion portions formed from both side surfaces toward the outside in the axial direction by burring, and corresponds to the insertion portion. A pair of friction facings each having a hole and fixed on both sides of the cushioning plate by the insertion portion. 2. The cushioning plate is formed of spring steel, and the insertion portion is formed by burring after being subjected to a heat treatment of annealing, and is inserted through the hole of the friction facing. The friction member according to claim 1, wherein the member is bent in an outer peripheral direction of the hole. 3. The friction member according to claim 1, wherein the friction member is fixed to an outer peripheral portion, and an input side plate is provided on the input side plate so as to be relatively rotatable within a predetermined angle range. A clutch disk assembly comprising: an output-side member; and a damper portion that elastically connects the input-side plate and the output-side member in a circumferential direction.