JPH09303416A - Friction member, and clutch disk assembly using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the opening of the outer peripheral part of a cushionning plate, due to thermal deformation, to obtain effective cushionning action, in a clutch disk using a sintered-alloy-made pad. SOLUTION: This clutch disk has first and second cushionning plates 20 and 21, rivets 25, and first and second sintered-alloy-made pads 22 and 23. The cushionning plates 20 and 21 are corrugately worked respectively, and also are fixdd with each other so as to be faced to the recesses of the corrugately worked part, to be mounted on the outer periphery of the clutch plates. The rivets 25 are provided on both the end parts in a circumferencial direction of the outer peripheral parts of the cusionning plates 20 and 21, to effectively regulate the mutual separation of the outer peripheral parts of both the cushionning plates 20 and 21. The sintered-alloy-made pads 22 and 23 are mounted on both the cushionning plates 20 and 21.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a friction member provided with a pad made of a sintered alloy and a clutch disk assembly using the same.

[0002]

2. Description of the Related Art Generally, clutch discs (friction members)
Is required to transmit high torque. As the facing of the clutch disc, glass fiber, resin, rubber or the like is usually used, but such a facing does not have sufficient torque transmission capacity.

Therefore, in order to secure a high torque transmission capacity, a clutch using a sintered body of a mixture of ceramic powder and metal powder or a sintered body of metal powder (hereinafter referred to as a sintered alloy pad) is used. I have a disc. This clutch disc is generally an iron core plate plated with copper,
Further, a ceramic powder and a metal powder are placed on top of this, and this is heated (may be further pressurized) to be formed.

[0004]

In the clutch disk assembly having such a sintered alloy pad, a ring-shaped plate is fixed to the outer periphery of the clutch plate, and is sintered to both surfaces of the ring-shaped plate. The gold pad is fixed. However, in the conventional clutch disc assembly having a sintered alloy pad, the clutch disc portion (friction member portion) does not have a cushioning action, and a shock is large during clutch engagement. Therefore, there is a problem that the vehicle cannot be started smoothly. Also, for the same reason, judder (abnormal vibration) and clutch squeal (abnormal noise) are likely to occur.

Therefore, it is conceivable to mount the cushioning plates that have been subjected to the wave processing in the radial direction so as to face each other and to mount the sintered alloy pad on the outer surface of the cushioning plates. In this case, the cushioning action is obtained because the cushioning plate bends during clutch engagement. However, by simply facing the cushioning plates and fixing them with rivets, when the cushioning plates are elastically deformed during clutch engagement, the outer peripheries open in the direction away from each other, or thermal expansion and contraction due to friction heat is repeated. Therefore, there is a problem that it is deformed due to the above, and an effective cushioning effect cannot be obtained.

Further, when fixing the sintered alloy pad to the plate member, a rivet is generally used, but the heads of the rivets protruding to the back surface (inner side) of the cushioning plate facing each other collide with each other to reduce the cushion amount. You will be limited. An object of the present invention is to provide an effective cushioning action in a friction member using a sintered alloy pad or a clutch disc assembly using the friction member.

Another object of the present invention is to secure a sufficient cushion amount.

[0008]

A friction member according to a first aspect of the present invention is a friction member used in a clutch disc assembly, and includes first and second cushioning plates, a restriction member, and first and second friction members. And a pad made of a sintered alloy. The first and second cushioning plates are respectively wave-processed, fixed to each other so that the recesses of the wave-processed portions face each other, and mounted on the outer periphery of the input portion of the clutch disc assembly. The restricting member is provided at the end portions of the first and second cushioning plates in the corrugated direction, and restricts the end portions of both cushioning plates from separating from each other. The first and second sintered alloy pads are mounted on the flat portions on the convex side of the corrugated portions of both cushioning plates.

In this friction member, the cushioning plate bends during clutch engagement, and the shock during clutch engagement is mitigated. At this time, in the cushioning plate, the end portions in the wave-processed direction try to be deformed so as to open each other, but this deformation is suppressed by the restriction member. Therefore, a sufficient cushion amount can be obtained.

A friction member according to a second aspect is the friction member according to the first aspect, wherein both cushioning plates are corrugated in the radial direction, and the regulating member is provided at the outer peripheral end portions of both cushioning plates. In this case, the opening of the outer peripheral portion can be effectively suppressed. A friction member according to a third aspect is the friction member according to the second aspect, wherein both cushioning plates are attached to an outer periphery of an input portion of the clutch disc assembly, and first extending from the attachment portion in an outer peripheral direction.
And a pad mounting portion to which the second sintered alloy pad is mounted. Further, the restricting member is a rivet that fixes both circumferential end portions of the outer peripheral portions of both cushioning plates.
In this case, the opening of the outer peripheral portion can be suppressed with a simple structure.

A friction member according to a fourth aspect of the present invention is the friction member according to any of the first to third aspects, wherein the sintered alloy pad is fixed to both cushioning plates by rivets. The rivet fixing position of the first sintered alloy pad and the rivet fixing position of the second sintered alloy pad on the second cushioning plate are set so as not to overlap on a plane. Here, since the rivets that fix the sintered alloy pads on both sides do not overlap, a large cushion amount can be secured.

A friction member according to a fifth aspect of the present invention is the friction member according to the fourth aspect, wherein the cushioning plate is provided at a position corresponding to the rivet to which the pad made of a sintered alloy is attached, in order to avoid interference with the rivet. have. In this case, a larger cushion amount can be secured. A clutch disc assembly according to a sixth aspect is a friction member according to any one of the first to fifth aspects, an input side plate having the friction member fixed to an outer peripheral portion, and an input side plate within a predetermined angle range. An output side member provided so as to be rotatable relative to each other, and a damper section that elastically connects the input side plate and the output side member in the circumferential direction.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A clutch disc assembly 1 according to one embodiment of the present invention shown in FIG. 1 includes a main body portion 2 and a clutch disc (friction member) 3. A spline hub 4 connected to a transmission shaft (not shown) is disposed at the center of the main body 2.

The spline hub 4 has a boss portion 4a and a flange portion 4b extending from the boss portion 4a to the outer peripheral side. A clutch plate 5 as an input side plate and a retaining plate 6 are arranged on both sides of the flange portion 4b. The plates 5 and 6 are substantially disk-shaped members, and rotatably engage with the outer periphery of the boss 4a. A plurality of window holes 4c extending in the circumferential direction are formed in the flange portion 4b at the middle portion in the radial direction.
, A torsion spring 8 is arranged. The torsion spring 8 elastically connects the clutch plate 5 and the retaining plate 6 to the spline hub 4 in the circumferential direction. Further, notches 4d having a predetermined width are formed on the outer peripheral portion of the flange portion 4b at equal intervals in the circumferential direction. The stop pin 9 penetrates through the notch 4d, and the clutch plate 5 and the retaining plate 6 are fixed by the stop pin 9. A gap is formed between the stop pin 9 and the notch 4d, which allows the stop pin 9 and the notch 4d to be formed.
The clutch plate 5 and the retaining plate 6 and the spline hub 4 can rotate relative to each other within a predetermined angle range until they come into contact with the edge portion of d.

Although not described in detail, the flange portion 4b
A hysteresis torque generating mechanism 11 for generating a hysteresis torque is provided between the inner peripheral portion of the clutch plate 5 and the retaining plate 6. The clutch plate 5 and the retaining plate 6 have cut-and-raised portions 5a and 6a that are cut and raised axially outward at positions corresponding to the window holes 4c of the flange portion 4b. The torsion spring 8 in the window hole 4c is supported by the portions 5a and 6a.

The clutch disc 3 is provided on the outer peripheral side of the clutch plate 5, and each has three first and second cushioning plates 20 and 21, and first clutches mounted on both sides of each cushioning plate 20 and 21. And second sintered alloy pads 22 and 23. The cushioning plates 20 and 21 are formed by corrugating plate members in the radial direction as shown in FIGS. 1, 2 and 3 which is an enlarged partial view of FIG. Mounting portions 20a, 21a fixed by rivets 24 to the outer peripheral end of the mounting portion 20a,
It has the pad mounting parts 20b and 21b which are branched and extended in two in the outer peripheral direction from 21a. Pad mounting section 20
As described above, b and 21b are wave-processed in the radial direction, and are elastically deformable in the axial direction. The two cushioning plates 20 and 21 are fixed such that the recesses of the wave processing portions face each other. The pad mounting portions 20b and 21b are formed in a fan shape such that the circumferential width on the inner peripheral side is gradually narrowed as compared to the outer peripheral side, and rivets are formed on both circumferential end portions on the outer peripheral side. They are fixed to each other by 25. Therefore, the outer peripheral portions of both cushioning plates 20 and 21 are restricted from moving in the directions away from each other, and the outer peripheral portions are prevented from opening.

As shown in FIG. 2, a groove 20c is formed in the first cushioning plate 20 from the outer periphery toward the inner side in the radial direction, and the second cushioning plate 21 is formed substantially in the circumferential direction. The groove 21c is formed. The groove 20c changes the direction of bending. That is, if the groove 20c is not provided, the drawing process is performed. The groove 21c is for flattening the rivet crimped portion.

The first sintered alloy pad 22 is fixed to the flat portion of the convex portion of the wave processing portion of the first cushioning plate 20 by a rivet 26. Similarly, the second sintered alloy pad 23 is used for the second cushioning plate 2 as well.
It is fixed to the flat portion of the convex portion of the corrugated portion 1 by the rivet 26. Further, both sintered alloy pads 22 and 23 are formed in a substantially rectangular shape, and as is clear from FIG.
The rivet mounting position of the first sintered alloy pad 22 on the first cushioning plate 20 and the rivet mounting position of the second sintered alloy pad 23 on the second cushioning plate 21 should not overlap on a plane. Holes 20d and 21d are formed in one cushioning plate so as not to interfere with the head of the rivet 26 for fixing the sintered alloy pad to the other cushioning plate.

With such a structure, when the clutch disc is pressed, the rivet 26 and the cushioning plate interfere with each other so that the cushion amount is not limited. In the clutch disc assembly having such a configuration, since the cushioning plates 20 and 21 are provided between the sintered alloy pads 22 and 23, the clutch engagement operation is performed and the sintered alloy pads 22 and 23 are performed.
Is pressed between the flywheel (not shown) and the pressure plate, the cushioning plates 20, 2
1 is elastically deformed. This elastic deformation acts as a cushion, and the cushion during engagement is reduced. At this time, the rivet positions of the sintered alloy pads 22 and 23 fixed to the cushioning plates 20 and 21 are set so as not to overlap on both sides, and the cushioning plates 20 and 21 do not interfere with the rivets 26. Since the holes 20d and 21d are formed as described above, the cushion amount is not limited. So shock,
The occurrence of judder and clutch squeal can be effectively suppressed.

Further, in this embodiment, both of the cushioning plates 20 and 21 are fixed to each other at both circumferential ends of their outer peripheral portions by the rivets 25, so that the outer peripheral portions of the cushioning plates 20 and 21 when they flex are bent. Opening can be prevented.

[0021]

As described above, according to the friction member and the clutch disc assembly of the present invention, in the one having the pad made of the sintered alloy, the cushioning plates are arranged so as to face each other, and Since the opening due to thermal deformation is restricted by the restriction member, an effective cushioning action can be obtained.

Further, if the rivet fixing positions of the two sintered alloy pads on the cushioning plates are set so as not to overlap on a plane, a large cushion amount can be secured. Further, when the cushioning plate is formed with a hole or a notch for avoiding interference with the rivet to which the sintered alloy pad is attached, a larger cushion amount can be secured.

[Brief description of drawings]

FIG. 1 is a partially omitted plan view of a clutch disc assembly according to an embodiment of the present invention.

FIG. 2 is a perspective view of a cushioning plate.

FIG. 3 is a partial sectional view of a clutch disc.

[Explanation of symbols]

 1 Clutch Disc Assembly 3 Clutch Disc (Friction Member) 4 Spline Hub 5 Clutch Plate 6 Retaining Plate 8 Torsion Spring 20, 21 Cushioning Plate 20a, 21a Mounting Part 20b, 21b Pad Mounting Part 22, 23 Sintered Alloy Pad 25 rivet

Claims (6)

[Claims] 1. A friction member used in a clutch disc assembly, which is corrugated and is fixed to each other such that concave portions of the corrugated portion face each other, and the friction member is provided on an outer periphery of an input portion of the clutch disc assembly. The first and second cushioning plates to be mounted and the end portions of the first and second cushioning plates in the corrugated direction are provided to prevent the end portions of both cushioning plates from separating from each other. Friction member, and first and second sintered alloy pads mounted on the flat portions on the convex side of the wave processing portions of both cushioning plates. 2. The friction member according to claim 1, wherein both cushioning plates are corrugated in a radial direction, and the restricting member is provided at an outer peripheral end portion of both cushioning plates. 3. The both cushioning plates are provided with a mounting portion fixed to an outer periphery of an input portion of the clutch disc assembly, and a pad made of the first and second sintered alloys extending from the mounting portion in an outer peripheral direction. The friction member according to claim 2, wherein the regulating member is a rivet that fixes both circumferential ends of the outer peripheral portions of the pad mounting portions of the cushioning plates. 4. The sintered alloy pad is fixed to the cushioning plate by a rivet, and
The rivet fixing position of the first sintered alloy pad on the cushioning plate and the second position on the second cushioning plate
The friction member according to any one of claims 1 to 3, which is set so as not to overlap the rivet fixing position of the sintered alloy pad on a plane. 5. The both cushioning plates have holes or notches at positions corresponding to the rivets to which the sintered alloy pads are attached to avoid interference with the rivets. Friction member. 6. The friction member according to claim 1, an input side plate having the friction member fixed to an outer peripheral portion thereof, and relatively rotatable with respect to the input side plate within a predetermined angle range. A clutch disc assembly comprising: an output side member provided; and a damper section that elastically connects the input side plate and the output side member in the circumferential direction.