JPH07248029A - Clutch disc assembly - Google Patents

Abstract

PURPOSE:To make an axial clearance difficult cause between a friction member and a cushioning plate. CONSTITUTION:A clutch disc assembly 1 has a clutch plate 7, a cushioning plate 16, two friction facings 15, and a plurality of rivets 17. The clutch plate 7 is connected to a main drive shaft. A plurality of cushioning plates 16 are fixed to the outer circumference of the clutch plate 7. The friction facings 15 are arranged on both side surfaces of the cushioning plates 16, and connectable to a fly wheel 31. The cushioning plates 16 are fixed to the friction facings 15 by the rivets 17. The cushioning plate 16 has first and second seat surfaces 16c, 16d fixed to the friction facings 15 by the rivets 17, and the first and second seat surfaces 16c, 16d give an initial load acting on the mutually separating directions to the friction facings 15.

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, and more particularly to a clutch disc assembly for transmitting torque from an input side rotating body to an output side rotating body.

[0002]

2. Description of the Related Art A clutch disc assembly is generally arranged between a flywheel on the engine side and a main drive shaft on the transmission side. The clutch disc assembly is a disc-shaped plate connected to the main drive shaft, a plurality of cushioning plates fixed to the outer periphery of the disc-shaped plate, and arranged on both sides of the cushioning plate and fixed to the cushioning plate by rivets. Equipped with an annular friction facing. When this friction facing is pressed against the side surface of the flywheel by the pressure plate of the clutch cover assembly, the torque of the flywheel is transmitted to the disc plate side.

When the pressure plate starts pressing the friction facing, the friction facing moves to the flywheel side together with the cushioning plate. Then, when the side surface of the friction facing comes into contact with the flywheel,
Next, the cushioning plate elastically deforms. Due to the elastic deformation of the cushioning plate, cushioning characteristics are obtained at the initial stage of clutch engagement. As a result, the shock when the clutch is engaged is absorbed.

[0004]

In the above conventional structure,
The cushioning plate is fixed to the friction member by rivets. However, if the friction facings contract due to the high temperature generated by the clutch engagement, for example, a gap is created between the rivet head and the friction facings in the axial direction. That is, the friction facing and the cushioning plate rattle in the axial direction. As a result, the torque around the facing is reduced, which also reduces the burst strength of the clutch disc assembly.

An object of the present invention is to make it difficult to form an axial gap between the friction member and the cushioning plate.

[0006]

A clutch disc assembly according to the present invention transmits torque from an input side rotating body to an output side rotating body, and includes a disc-shaped plate, a plurality of cushioning plates and two sheets. It has an annular friction member and a rivet. The disk-shaped plate is connected to the output side rotating body. The plurality of cushioning plates are fixed to the outer circumference of the disc-shaped plate. The two annular friction members are
The cushioning plates are arranged on both sides of the cushioning plates and can be connected to the input side rotating body. The rivet fixes the plurality of cushioning plates and the two friction members. The cushioning plate has a seat surface fixed to the friction member by a rivet, and the seat surface applies an initial load acting on the friction member in directions away from each other.

The seating surface of the cushioning plate is preferably curved in the free state.

[0008]

In the clutch disc assembly according to the present invention, when the disc-shaped friction member is connected to the input side rotating body, the torque of the input side rotating body is input. The torque is transmitted from the cushioning plate to the disc-shaped plate and output to the output side rotating body. Since the seating surface of the cushioning plate applies an initial load acting on the friction member in a direction away from each other, even if the friction member contracts due to heat, there is a gap between the seat surface and the friction member in the axial direction. Unlikely to occur.

When the seating surface of the cushioning plate is curved in the free state, the above action becomes more remarkable.

[0010]

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

A spline hub 2 connected to a main drive shaft 32 is arranged at the center of the clutch disc assembly 1. The spline hub 2 has a spline hole 2a at the center thereof which meshes with spline teeth of the main drive shaft 32 (not shown).
Further, the spline hub 2 is integrally formed with a flange portion 3 that projects to the outer peripheral side. Stopper notches 3a are formed on the outer peripheral portion of the flange portion 3 at predetermined intervals, and five window holes 3b are formed on the inner peripheral side thereof at equal intervals in the circumferential direction. A torsion spring 4 is housed in each window hole 3b. On the outer peripheral side of the spline hub 2, a pair of generally disc-shaped retaining plates 6 and clutch plates 7 are arranged. Both plates 4,
Reference numeral 5 is fitted to the spline hub 1 so as to be rotatable relative thereto. Retaining plate 6 and clutch plate 7
And are integrally connected by a stop pin 8 at the outer peripheral portion thereof. The stop pin 8 is arranged in the stop pin notch 3 a of the flange portion 2. A plurality of cushioning plates 16 are connected to the outer peripheral portion of the clutch plate 6 by rivets 9. Friction facings 15 are arranged on both sides of the cushioning plate 16, respectively. Friction facing 1
5 is fixed to the cushioning plate 16 by rivets 17. When the friction facing 15 is pressed against the flywheel 31 by a pressure plate (not shown), the torque of the flywheel 31 is input to the clutch disc assembly 1.

Next, the connection between the cushioning plate 16 and the friction facing 15 will be described in detail with reference to FIG. As shown in FIG. 2, each cushioning plate 16 includes a fixing portion 16a fixed to the outer periphery of the clutch plate 7 and a cushioning portion 16b integrally formed with the fixing portion 16a. The cushioning portion 16b is an elastically deformable plate having a step in the axial direction. The cushioning portion 16b is located on a plane different from the first seat surface portion 16c fixed to the one friction facing 15 by the rivet 17 and the second seat surface fixed to the other friction fading 15 by the rivet 17. 16 d of surface parts, the connection part 16 e which connects the 1st seat surface part 16 c and the 2nd seat surface part 16 d, and each seat surface part 16
It is composed of inclined portions 16f extending diagonally on both ends of c and 16d. The body of the rivet 17 has a hole 15a of the friction facing 15 and the cushioning plate 16
Through the hole 16g. The friction facing 15 has a head 1 on the side between the friction facings 15 of the rivet 17.
A hole 15b is formed at a position corresponding to 7a.

As shown in FIG. 4, in the free state before assembly, the first and second seat surface portions 16c and 16d of the cushioning plate 16 are curved (the second seat surface portion 16).
Only d is shown). Therefore, when fixed so as to abut the surface of the flat friction facing 15 as shown in FIG. 3, the first and second seat surface portions 16c and 16d act in a direction away from each other with respect to the friction facing 15 in contact therewith. The initial load is applied. That is, both ends in the circumferential direction of the first and second seat surface portions 16c and 16d apply a biasing force to the friction facing 15 that is in contact with them. Further, the rivet 1 is formed in the middle portion in the circumferential direction of the first and second seat surface portions 16c and 16d.
The head portion 17a of No. 7 is urged toward the friction facing 15 side on the opposite side. As a result, for example, when the friction facing 15 contracts due to the heat generated by the clutch connection, the first and second friction facings 15 contract as the friction facing 15 contracts in the axial direction.
Both ends of the seat surface portions 16c and 16d in the circumferential direction follow the friction facing 15. Therefore, an axial gap is less likely to occur between the friction facing 15 and the seating surface 16c of the cushioning plate 16, and both members are less likely to rattle. As a result, it is possible to prevent the reduction of the torque around the friction facing 15 and the reduction of the burst strength.

Corresponding to the window hole 3b of the flange portion 3, a window hole 6a is formed in the retaining plate 6 and a window hole 7a is formed in the clutch plate 7. This window hole 6a, 7a
Is cut and raised so as to cover the torsion spring 4 from the outside, and the torsion spring 4 is housed inside. An annular cone spring 11, a friction plate 12, and a friction washer 13 are arranged from the transmission side between the inner peripheral portion of the flange portion 3 and the inner peripheral portion of the retaining plate 6. A friction washer 14 is arranged between the flange portion 3 and the inner peripheral portion of the clutch plate 7. These friction washers 13, 14 are attached to the flange portion 3
By sliding between the plate and the plates 6 and 7, a predetermined frictional force is generated.

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 moves toward the flywheel 31 and comes into contact with the flywheel 31, the cushioning plate 16 elastically deforms between the two friction facings 15. The cushioning characteristic at this time absorbs a shock when the clutch is engaged.

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

[0017]

In the clutch disc assembly according to the present invention, since the seating surface of the cushioning plate exerts an initial load acting on the friction member in a direction away from each other, even if the friction member contracts due to heat. A gap is unlikely to occur between the seat surface and the friction member.

When the seating surface of the cushioning plate is curved in the free state, the above effect becomes more remarkable.

[Brief description of drawings]

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

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

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

FIG. 4 is a partial vertical sectional view of a friction facing and a cushioning plate before mounting.

[Explanation of symbols]

 1 Clutch Disc Assembly 7 Clutch Plate 15 Friction Facing 16 Cushioning Plate 17 Rivet 31 Flywheel 32 Main Drive Shaft

Claims (2)

[Claims] 1. A clutch disc assembly for transmitting torque from an input side rotating body to an output side rotating body, comprising: a disc plate connected to the output side rotating body; and an outer periphery of the disc plate. A plurality of fixed cushioning plates, two annular friction members arranged on both side surfaces of the plurality of cushioning plates and connectable to the input side rotating body, the plurality of cushioning plates and the two friction members. A friction member and a rivet for fixing the friction member, the cushioning plate has a seat surface fixed to the friction member by the rivet, and the seat surface applies an initial load acting in a direction away from each other to the friction member. Giving, clutch disc assembly. 2. The clutch disc assembly according to claim 1, wherein the seating surface of the cushioning plate is curved in a free state.