JPH09287621A - Clutch disc and clutch disc assembly using the clutch disc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide various cushion characteristics. SOLUTION: A clutch disc 3 is used in a clutch disc assembly and comprises a pair of first and second cushioning plates 20 and 21 mounted facing each other on the outer periphery of the clutch plate 5 of the clutch disc assembly; and pads 22 and 23 made of a sintered alloy fixed on the outer surfaces of the first and second cushioning plates 20 and 21, respectively. Corrugation processing is applied on the first and second cushioning plates 20 and 21 so as to provide two-stage cushion characteristics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch disc having cushioning characteristics and a clutch disc assembly using the same.

[0002]

2. Description of the Related Art Generally, a clutch disc assembly used in a passenger car includes a clutch plate as an input side plate, a spline hub as an output side member, and a damper portion that elastically connects the clutch plate and the spline hub. And a clutch disc fixed to the outer peripheral portion of the clutch plate.

The clutch disk is made of an organic material such as glass fiber, resin, rubber, etc., for example, a sintered body of a mixture of ceramic powder and metal powder or a sintered body of metal powder (hereinafter referred to as fired bond). It has a friction member composed of a gold pad). For clutch discs that use organic friction members, the opposing 1
A cushioning plate is arranged between the pair of friction members, and the cushioning plate absorbs shock during clutch engagement.

The clutch disc using the sintered alloy pad does not have a cushioning plate.

[0005]

In the conventional clutch disc assembly, although the cushioning plate is provided, the cushion characteristic is linear and it is difficult to obtain a desired characteristic. For example, if the focus is on suppressing the judder, measures against squeaking (abnormal noise) become insufficient, and conversely, if the focus is on suppressing the squeal, it becomes difficult to suppress the judder.

Particularly in the clutch disc using the sintered alloy pad, the problems of judder and squeal are remarkable, and it is desired to solve these problems. An object of the present invention is to easily obtain various cushion characteristics.

[0007]

A clutch disc according to a first aspect of the present invention is used in a clutch disc assembly, and a pair of clutch discs are mounted on an outer periphery of an input portion of the clutch disc assembly so as to face each other. It is provided with the 1st and 2nd plate members and the friction member fixed to each outer surface of the 1st and 2nd plate members. And the first
At least one of the second plate member and the second plate member is corrugated so as to obtain a plurality of steps of cushioning characteristics.

In this case, for example, the cushion characteristic of the first stage can be used as a countermeasure against judder, and the cushion characteristic of the second stage can be used as a characteristic against squeal. A clutch disc according to a second aspect is the clutch disc according to the first aspect, wherein an inner first bent portion and an outer first bent portion that are bent toward a second plate side are provided on an inner peripheral portion and an outer peripheral portion of the first plate member. And an inner second bent portion and an outer second bent portion having a shorter axial length than the first bent portion are formed on the second plate side.

Here, at the time of clutch engagement, first, the first bent portion having a long axial length bends, and 1
The cushion characteristic of the step is obtained. Next, when the clutch disc is further pressed, in addition to the first bent portion,
The bent part bends. Therefore, the cushion characteristic of the second stage is obtained by bending the first bent portion and the second bent portion.

According to a third aspect of the present invention, there is provided the clutch disc according to the second aspect, wherein the second plate member has a bent portion having the same shape as that of the first plate member formed on an inner peripheral portion and an outer peripheral portion thereof. A clutch disc according to a fourth aspect is the clutch disc according to any one of the first to third aspects, wherein the friction member is a metal-based sintered friction member. When the friction member is a sintered metal friction member, the cushioning characteristics of a plurality of steps are particularly effective.

A clutch disc assembly according to a fifth aspect of the present invention is the clutch disc according to any one of the first to fourth aspects, an input side plate having the clutch disc fixed to an outer peripheral portion, and a predetermined angle on the input side plate. An output side member provided so as to be rotatable relative to each other within a range, and a damper section that elastically connects the input side plate and the output side member in the circumferential direction.

[0012]

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 has a plurality of first and second cushioning plates 20 and 21, respectively, and first and second cushioning plates mounted on both sides of the cushioning plates 20 and 21, respectively. It has pads 22 and 23 made of the second sintered alloy. Both cushioning plates 20 and 21 are shown in FIGS.
3 which is an enlarged partial view of FIG. 3 and FIG. 4 in which the processed parts of the cushioning plates 20 and 21 are exaggerated, the plate members are formed by wave-processing in the radial direction. Mounting portions 20a, 21a fixed to the outer peripheral end of the plate 5 by rivets 24,
It has cushion parts 20b and 21b extending from the mounting parts 20a and 21a in the outer peripheral direction.

As described above, the cushion portions 20b and 21b are wave-formed 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 cushion portions 20b and 21b
Is a flat portion 2 on which the sintered alloy pads 22 and 23 are mounted.
0c, 21c, inner first bent portions 20d, 21d formed on the inner peripheral side of the flat portions 20c, 21c, and the flat portion 2
It has outer side first bent portions 20e, 21e formed on the outer peripheral side of 0c, 21c. In addition, as shown in FIGS. 2 and 4, in the center portion of the inner first bent portions 20d and 21d, the inner second folded portion having a larger bending angle than other portions and a shorter axial length of the folded portion. Part 20
Similarly, f and 21f are the outer first bent portions 20e and 21f.
In the central part of e, the bending angle is larger than other parts,
Outer second bent portion 2 in which the bent portion has a short axial length
0 g and 21 g are formed.

As is apparent from FIG. 4, when the cushioning plates 20 and 21 are not compressed, the inner first bent portions 20d and 21d and the outer first folded portion 20 of each cushioning plate 20 and 21 are compressed.
The tips of e and 21e are in contact with each other, but the inner second bent portions 20f and 21f and the outer second bent portion 20g,
The tip of 21g has both cushioning plates 20, 2
When 1 is compressed by a predetermined amount, it comes into contact.

The first sintered alloy pad 22 is fixed to the flat portion 20c of the corrugated 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 21c of the wave processing portion of No. 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 30 and 31 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 structure, when the clutch engagement operation is performed and the sintered alloy pads 22 and 23 are pressure-contacted between the flywheel (not shown) and the pressure plate, the cushioning plates 20 and 21 are elastically deformed. To do. This elastic deformation acts as a cushion, and the shock at the time of engagement is relieved. Here, both cushioning plates 20, 21
, The tips of the inner first bent portions 20d and 21d and the outer first bent portions 20e and 21e are in contact with each other, and the other portions are not in contact with each other. Therefore, when the cushioning plates 20 and 21 are elastically deformed, as shown in FIG. 5, the portion (I) where the elastic deformation amount is small shows a cushion characteristic with a gentle inclination. And both cushioning plates 2
When the deformation of 0 and 21 progresses, the inner second bent portion 20f,
21f and the outer second bent portions 20g and 21g start to be deformed. Therefore, the cushion characteristic is (II) in FIG.
The slope becomes steep, as shown by the part.

Since such a two-step cushion characteristic can be easily obtained, it is possible to take countermeasures against judder in the portion (I) and countermeasures against squeaking in the portion (II) of FIG. Further, 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 30 and 31 are formed in the hole, the cushion amount is not limited. Therefore, it is possible to effectively suppress the occurrence of shock, judder, and clutch squeal.

[0021]

As described above, according to the friction member and the clutch disc assembly of the present invention, at least one of the first plate member and the second plate member to which the friction member is fixed has a plurality of steps of cushioning characteristics. Since the wave processing is performed as described above, for example, the cushion characteristic of the first stage can be set as the characteristic for countermeasure against judder, and the cushion characteristic of the second stage can be set as the characteristic for countermeasure against squeal.

In addition, at least one of the first and second plate members has an inner peripheral portion and an outer peripheral portion, and an inner first bent portion and an outer first bent portion bent to the second plate side, and a second plate side to the second plate side. When the inner second bent portion and the outer second bent portion whose axial length is shorter than the first bent portion are formed, a two-step cushion characteristic can be obtained with a simple configuration.

[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.

FIG. 4 is an exaggerated view of the cushioning plate.

FIG. 5 is a cushion characteristic diagram of the embodiment.

[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 20d, 21d Inner First Bending Part 20e, 21e Outer First Bending Part 20f, 21f Inside Second bent portion 20g, 21g Outer second bent portion 22, 23 Sintered alloy pad

Claims (5)

[Claims] 1. A clutch disc for use in a clutch disc assembly, comprising a pair of first and second plate members mounted on the outer periphery of an input portion of the clutch disc assembly so as to face each other, A friction member fixed to the outer surface of each of the first and second plate members, and at least one of the first and second plate members,
A clutch disc that has been wave-processed to obtain multiple-step cushioning characteristics. 2. An inner first fold portion and an outer first fold portion that are bent toward the second plate side, and an inner first fold portion and an outer first fold portion that are bent toward the second plate side, on the inner peripheral portion and the outer peripheral portion of the first plate member. 1 Inner second with axial length shorter than the bent part
The clutch disc according to claim 1, wherein the bent portion and the outer second bent portion are formed independently of each other. 3. The clutch disc according to claim 2, wherein a bent portion having the same shape as that of the first plate member is formed on an inner peripheral portion and an outer peripheral portion of the second plate member. 4. The clutch disc according to claim 1, wherein the friction member is a metal-based sintered friction member. 5. The clutch disc according to any one of claims 1 to 4, an input side plate having the clutch disc 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.