JP2004100963A - Friction connection part of clutch disk assembly, and clutch disk assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce abrasion in a friction connection part using a friction material formed of a composite material of metal and ceramics. <P>SOLUTION: The friction connection 2 of a clutch disk assembly 1 is provided with a first core plate 15, a second core plate 15, a cushioning plate 17, and two friction materials 16. The first core plate extends in a circumferential direction. The second core plate extends in the circumferential direction and is arranged to face the first core plate. The cushioning plate 17 is arranged between the first and second core plates 15, 15. The two friction materials 16 are formed of the composite material of the metal fixed on the outside of the first and second core plates 15, 15 and the ceramics. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a friction coupling portion of a clutch disk assembly and a clutch disk assembly.

In general, a clutch disk assembly used for a vehicle clutch generally includes a clutch plate and a retaining plate as input members, a hub as an output member disposed at the center of both plates, and a plate and a hub formed in a circle. It comprises an elastic member such as a coil spring connected in the direction, and a hysteresis torque generating mechanism for generating a hysteresis torque when the plate and the hub rotate relative to each other.

に よ り In response to recent demands for higher speed and higher torque of vehicles, friction materials made of a composite material of ceramics and metal have been used as friction materials used for friction coupling portions of a clutch disk assembly. This friction material is obtained by, for example, mixing metal and ceramic powders, forming them under high pressure at room temperature, and sintering them at high temperature in a reducing atmosphere. This friction material is joined to both surfaces of one core plate, for example, in a sintering process.

摩擦 In the frictional connection using a friction material made of a composite material of metal and ceramics, there is no cushioning function, so the friction material wears up.

課題 An object of the present invention is to reduce wear of a friction material in a frictional connection portion using a friction material made of a composite material of metal and ceramics.

The friction coupling portion of the clutch disk assembly according to the first aspect includes a first core plate, a second core plate, a cushioning plate, and two friction members. The first core plate extends in the circumferential direction. The second core plate extends in the circumferential direction and is arranged to face the first core plate. The cushioning plate is disposed between the first and second core plates. The two friction materials are made of a composite material of metal and ceramic fixed outside the first and second core plates.

よ う Thus, in the friction coupling portion having the friction material made of the composite material of metal and ceramic, cushioning characteristics can be obtained by the cushioning plate. As a result, wear of the friction material is reduced due to a decrease in the surface pressure of the friction material.

In the friction coupling portion of the clutch disk assembly according to the second aspect, the cushioning plate has a step in the radial direction. Thus, a simple and compact friction coupling portion can be realized.

According to a third aspect of the present invention, in the friction coupling portion of the clutch disk assembly, the first core plate and the cushioning plate have a fixing portion fixed to the clutch disk assembly on an inner peripheral portion. The friction connecting portion further includes a connecting member that connects the cushioning plate and the second core plate.

In the friction coupling portion of the clutch disk assembly according to the fourth aspect, the coupling member is composed of two members that fix both ends in the circumferential direction of the cushioning plate and the second core plate, and the friction material is in the circumferential direction of both coupling members. It is located between them.

According to a fifth aspect of the present invention, in the friction coupling portion of the clutch disk assembly, the first core plate has a hole formed at a position corresponding to the coupling member.

A clutch disk assembly according to a sixth aspect includes a clutch disk body, and a plurality of the friction coupling portions according to any one of the first to fifth aspects arranged on an outer periphery of the clutch disk body.

(4) When a cushioning plate is used in a friction coupling portion of a clutch disk having a friction material made of a composite material of metal and ceramic, cushioning characteristics are obtained, and wear of the friction material is reduced due to a decrease in surface pressure of the friction material.

[First Embodiment]
The clutch disk assembly 1 shown in FIGS. 1 and 2 transmits and interrupts torque from an engine-side flywheel (not shown) disposed on the left side of FIG. 1 to a transmission (not shown) on the right side of FIG. Is a device for performing the following. OO in FIG. 1 is the rotation axis of the clutch disc assembly 1.

The clutch disc assembly 1 mainly includes a friction connecting portion 2, first and second flange plates 3, 4, first and second sub plates 5, 6, and first and second retaining plates 7, , 8, a plurality of first coil springs 9, a second coil spring 10, a third coil spring 11, and a hub 12.

The frictional connection portion 2 is a portion pressed against a flywheel (not shown) by a pressure plate. As is clear from FIG. 2, the friction connecting portion 2 is constituted by a plurality of plate portions. Each plate portion includes first and second core plates 15, 15 made of an iron plate, a friction material 16 fixed to an outer surface of each core plate 15, made of a composite material of ceramic and metal, and each core plate 15. , 15 and a fastener 18 for connecting the second core plate 15 and the cushioning plate 17. The inner periphery of the first core plate 15 and the cushioning plate 17 on the engine side is fixed to the outer periphery of the first and second flange plates 3 and 4 by a plurality of rivets 19. The cushioning plate 17 has a step in the radial direction, and the inner and outer circumferences are in contact with the first core plate 15 side, and the radially intermediate portion is in contact with the second core plate 15B side. Since the cushioning plate 17 has a step in the radial direction as described above, it is not necessary to extend each plate portion longer than necessary in the circumferential direction, and a simple and compact structure is realized. The fasteners 18 are provided at both ends in the circumferential direction of the second core plate 15. A hole 15a is formed at a position corresponding to the fastener 28 in the first core plate 15A. Each of the friction members 16 is disposed between the holes 15a in the circumferential direction of the first core plate 15A and between the fasteners 28 of the second core plate 15 in the circumferential direction. The area of the friction material 16 is reduced by 15% as compared with the related art. This is made possible by providing the cushioning plate 17 so that the surface pressure can be maintained at the same level even if the area of the friction material 16 is reduced. As a result, the weight of the friction connecting portion 2 is reduced.

効果 Also, as an effect of the cushioning plate 17, when the area of the friction material is made approximately the same as the conventional one, the wear of the friction material is reduced. Further, vibrations and the like are reduced when the vehicle starts moving, and the vehicle becomes smooth.

The first and second flange plates 3 and 4 are disk-shaped plate members, and are fixed so as to abut each other and rotate integrally with the rivets 19 described above. The first and second plates 3 and 4 have three first window holes 3a and 4a extending in the circumferential direction on the outer peripheral side. Further, four second window holes 3b, 4b arranged at equal intervals in the circumferential direction are formed on the inner peripheral side of the first window holes 3a, 4a. The inner circumferences of the second window holes 3b and 4b are open radially inward. The distal ends of the inwardly protruding portions 3c, 4c that form the space between the second window holes 3b, 4b in the circumferential direction extend close to the outer peripheral surface of the hub 12, which will be described later.

ピ ン In the first and second flange plates 3 and 4, pin moving holes 3d and 4d extending in the circumferential direction are formed between the first window holes 3a and 4a. The outer peripheral portions of the pin moving holes 3d and 4d extend in the circumferential direction longer than the inner peripheral portions.

The first and second sub-plates 5 and 6 are disk-shaped plate members, and are disposed on both sides of the first and second flange plates 3 and 4. Three first window holes 5a and 6a corresponding to the first window holes 3a and 4a of the first and second flange plates 3 and 4 are formed in the first and second sub plates 5 and 6, respectively. The first window holes 5a and 6a are circumferentially shorter than the first window holes 3a and 4a and are disposed at the center in the circumferential direction. The outer peripheral portions of the first and second sub-plates 5 and 6 are fixed by a plurality of first stop pins 21. The first stop pin 21 penetrates the inner peripheral side portions of the pin moving holes 3 d and 4 d formed in the plates 3 and 4. Four second window holes 5b, 6b are formed in the inner peripheral portions of the first and second sub-plates 5, 6 so as to correspond to the second window holes 3b, 4b of the plates 3, 4. The first coil spring 9 is disposed in the second window holes 3b, 4b, 5b, 6b, and both ends are in contact with the respective window holes.

The first and second retaining plates 7 and 8 are disk-shaped plate members, and are disposed on both sides of the first and second sub-plates 5 and 6. The first and second retaining plates 7, 8 are fixed to each other by a plurality of second stop pins 32. The second stop pin 32 penetrates the outer peripheral portions of the pin moving holes 3d, 4d formed in the first and second flange plates 3, 4. Furthermore, a plurality of inner peripheral teeth 7d, 8d protruding radially inward are formed on the inner peripheral edge of the inner peripheral portions of the first and second retaining plates 7, 8. The inner peripheral teeth 7d, 8d extend in the axial direction. Further, four engaging holes 7c, 8c are formed in the first and second retaining plates 7, 8 at circumferentially equal intervals at radially intermediate portions.

３Three window holes 7a, 8a corresponding to the first window holes 5a, 6a are formed in the outer peripheral portions of the first and second retaining plates 7, 8. Cut-and-raised portions 7b and 8b are formed in the inner and outer peripheral portions of each of the window holes 7a and 8a.

The second coil spring 10 is disposed in a space formed by the first window holes 3a, 4a, 5a, 6a and the window holes 7a, 8a. The second coil spring 10 includes a large coil spring 10 a and a small coil spring 10 b disposed inside the large coil spring 10 a, and has higher rigidity than the first coil spring 9. Spring seats 25 are arranged on both ends of the second coil spring 10. Each spring seat 25 is in contact with the first window holes 5a, 6a and the window holes 7a, 8a, but a circumferential circle having an angle H is formed between each spring seat 25 and both ends of the first window holes 3a, 4a. There is a gap in the direction.

第 A first friction washer 22 is disposed between the first flange plate 3 and the first sub-plate 5 in the axial direction and between the first coil spring 9 and the second coil spring 10 in the radial direction. A second friction washer 23 is disposed between the second flange plate 4 and the second sub-plate 6 in the axial direction and between the first coil spring 9 and the second coil spring 10 in the radial direction.

Between the first retaining plate 7 and the first sub-plate 5 and between the first coil spring 9 and the second coil spring 10, a third friction washer 28, a friction plate 29 from the first sub-plate 5 side. , The first cone spring 30 are arranged in this order. At the inner peripheral end of the friction plate 29, four engaging portions 29a projecting in the axial direction are formed, and the engaging portions 29a cannot be relatively rotated with the engaging holes 7c of the first retaining plate 7. And movably in the axial direction. The first cone spring 30 is compressed axially between the second retaining plate 8 and the second sub-plate 6 in the axial direction and between the first coil spring 9 and the second coil spring 10 in the radial direction. A third friction washer 28, a friction plate 29, and a first cone spring 30 are arranged in this order from the second sub-plate 6 side. A plurality of engagement portions 29a extending in the axial direction are formed at the inner peripheral end of the friction plate 29, and the engagement portions 29a are relatively non-rotatable in the engagement holes 8c of the second retaining plate 8 and are not rotatable in the axial direction. Is movably engaged with. The hub 12 is disposed at the center of the plates 3, 4, 5, 6, 7, and 8 in which the first cone spring 30 is compressed in the axial direction. The inner peripheral portion of the hub 12 is formed with spline teeth 12a that engage with a shaft extending from a transmission (not shown). Further, on the outer periphery of the hub 12, outer peripheral teeth 12b are formed. The inner peripheral teeth 7d and 8d of the first and second retaining plates 7 and 8 are inserted into the outer peripheral teeth 12b. A gap is provided between the inner teeth 7d, 8d and the outer teeth 12b in the circumferential direction. A snap ring 36 is fixed to the outer peripheral surface of the hub 12. The snap ring 36 is in contact with the inner peripheral engine side (the left side in FIG. 1) of the second retaining plate 8.

固定 A fixed washer 38 is fixed to the inner peripheral portion of the second retaining plate 8 on the transmission side. The fixed washer 38 has a projection 38 a that extends in a hole formed in the second retaining plate 8 so as to be relatively non-rotatable. An accommodation recess 38b is formed on the transmission side of the fixed washer 38. Narrow slide grooves 38c extending in the circumferential direction are formed on both sides in the circumferential direction of the housing recess 38b. The third coil spring 11 having the lowest rigidity is arranged in the housing recess 38b.

The engagement plate 39 is a disk-shaped plate, and is disposed on the transmission side of the fixed washer 38. The engagement plate 39 has a pair of engagement portions 39a on the outer periphery that extend in the radial direction and bend toward the engine from the engagement plate 39. The engagement portions 39a support both ends of the third coil spring 11 and extend into the slide grooves 38c. Further, on the inner peripheral portion of the engagement plate 39, inner peripheral teeth 39b that mesh with the outer peripheral teeth 12b of the hub 12 are formed.

The second cone spring 40 is arranged on the transmission side of the engagement plate 39. Inner peripheral teeth 40 a are formed at the inner peripheral end of the second cone spring 40, and the inner peripheral teeth 40 a engage with the outer peripheral teeth 12 b of the hub 12 and support the transmission side. As a result, the second cone spring 40 urges the engagement plate 39 axially against the fixed washer 38.

Next, the operation will be described.
When the friction connecting portion 2 is connected to a flywheel (not shown), the torque of the flywheel is increased by the friction connecting portion 2, the first and second flange plates 3, 4, the first coil spring 9, the first and second sub-plates. 5, 6, the second coil spring 10, the first and second retaining plates 7, 8, the third coil spring 11, and the hub 12. Then, the torque is output from the hub 12 to the transmission (not shown).

When, for example, torsional vibrations due to combustion fluctuations on the engine side are transmitted to the clutch disk assembly 1, each plate performs periodic relative rotation, and the first, second and third coil springs 9, 10, 11 Is compressed, and the friction washers and the like slide frictionally, thereby generating hysteresis.

Torsional Characteristics The torsional characteristics of the clutch disk assembly 1 will be described with reference to the schematic diagrams of the torque transmission shown in FIGS. 3 to 6 and the torsional characteristic diagrams shown in FIG. 3 to 6, the first and second flange plates 3 and 4 are fixed to another member, and the hub 12 (not shown in FIGS. 3 to 6) is connected thereto. The description will be made assuming that the right direction is rotated.

In the range of 0 to A in FIG. 7 where the torsion angle is small, only the third coil spring 11 having extremely low rigidity is compressed, and between the hub 12 and the first and second retaining plates 7 and 8. Relative rotation occurs. In this range, the engagement plate 39 and the fixed washer 38 frictionally slide with each other to generate a small hysteresis torque.

7 when the torsion angle is A in FIG. 7, the outer teeth 12b abut against the inner teeth 7d, 8d, and the first and second retaining plates 7, 8 are integrated with the hub 12. Rotate. Thereafter, as is apparent from FIGS. 3 and 4, a second coil spring 10 and a first coil are provided between the first and second retaining plates 7, 8 and the first and second flange plates 3, 4. The spring 9 works in series via the first and second sub-plates 5 and 6. At this time, the first coil spring 9 and the second coil spring 10 are both compressed, and low rigidity characteristics are obtained. Since the first coil spring 9 has lower rigidity than the second coil spring 10, the first coil spring 9 is compressed more than the second coil spring 10.

In this range, the two third friction washers 28 frictionally slide between the friction plate 29, which rotates integrally with the first and second retaining plates 7, 8, and the first and second sub-plates 5, 6. I do. As a result, a large hysteresis torque is generated.

When the torsion angle becomes B in FIG. 7, as shown in FIG. 3a, 4a, and thereafter, the second coil spring 10 is compressed between the first and second retaining plates 7, 8 and the first and second flange plates 3, 4. At this time, as shown in FIG. 6, the first and second sub-plates 5 and 6 are not receiving torque from the first and second retaining plates 7 and 8 and have stopped rotating, and the first coil Spring 9 is not compressed. That is, only the second coil spring 10 is compressed, and as a result, high torsional rigidity is obtained. When the second stop pin 32 contacts the ends of the pin moving holes 3d, 4d, the relative rotation between the first and second retaining plates 7, 8 and the first and second flange plates 3, 4 stops.

In this range, the two third friction washers 28 frictionally slide between the friction plate 29, which rotates integrally with the first and second retaining plates 7, 8, and the first and second sub-plates 5, 6. I do. As a result, a large hysteresis torque is generated.

Thus, the rigidity is low when the torsion angle is small and the rigidity is high when the torsion angle is large, so that both low rigidity and high stopper torque can be achieved.

In addition, since the first coil spring 9 is disposed between the first and second retaining plates 7, 8 in the axial direction, the first and second retaining plates 7, 8 have cutouts and window holes. No need. Therefore, the first and second retaining plates 7, 8 have improved durability against torque transmission.

Furthermore, since the first coil spring 9 is arranged on the inner peripheral side of the second coil spring 10, the entire device is downsized. Moreover, in the high torsion angle range, the second coil spring 10 disposed on the outer peripheral side transmits torque, so that a sufficiently high torque can be obtained.
[Second embodiment]
The clutch disk assembly 101 shown in FIGS. 8 and 9 has the same structure as the clutch disk assembly 1 in the embodiment. Here, only different points will be described in detail.

The frictional connection portion 102 is fixed to the outer peripheral portions of the first and second sub-plates 105 and 106 by a plurality of rivets 119. That is, the outer peripheral portions of the first and second sub-plates 105 and 106 are fixed by the rivets 119. A flange plate 103 is arranged between the first and second sub-plates 105 and 106 in the axial direction, and first and second retaining plates 107 and 108 are arranged on both sides thereof. The first coil spring 109 is disposed in the second window hole 103b of the flange plate 103 and the second window holes 105b and 106b of the first and second sub-plates 105 and 106. Further, the first coil spring 109 is disposed between the inner peripheral portions of the first and second retaining plates 107 and 108 in the axial direction. The second coil spring 110 includes a first window hole 103a in the flange plate 103, first window holes 105a and 106a in the first and second sub-plates 105 and 106, and window holes in the first and second retaining plates 107 and 108. It is arranged in 107a, 108a. The spring seats 125 disposed at both ends in the circumferential direction of the second coil spring 110 are in contact with the window holes 103a, 107a, and 108a, and the spring seat 125 and the first windows of the first and second sub-plates 105 and 106. A gap having a predetermined angle J is provided between the ends of the holes 105a and 106a in the circumferential direction.

A smaller gap is secured between the outer peripheral teeth 112b of the hub 12 and the inner peripheral teeth 107d, 108d of the first and second retaining plates 107, 108 than in the above embodiment. Note that, unlike the above-described embodiment, no elastic member is provided to prevent relative rotation when the hub and the retaining plate rotate relative to each other.

Next, the operation will be described.
When the friction connecting portion 2 is connected to a flywheel (not shown), the torque of the flywheel is increased by the friction connecting portion 102, the first and second sub-plates 105 and 106, the first coil spring 109, the flange plate 103, and the second coil. The power is transmitted to the spring 110, the first and second retaining plates 107 and 108, and the hub 112. Then, the torque is output from the hub 112 to the transmission (not shown).

When, for example, torsional vibration caused by combustion fluctuations on the engine side is transmitted to the clutch disk assembly 101, the plates rotate periodically and the first and second coil springs 109 and 110 are compressed, and the respective plates are compressed. Hysteresis occurs due to friction sliding of a friction washer or the like.

Torsional Characteristics The torsional characteristics of the clutch disk assembly 101 will be described with reference to FIGS. 10 to 13 which are schematic diagrams of torque transmission and the torsional characteristic diagram of FIG. Here, the first and second sub-plates 105 and 106 are fixed to another member, and the hub 112 (not shown in FIGS. 10 to 13) is rotated to the right in FIGS. It will be explained as if it were.

The hub 112 ranging from 0 to A in FIG. 14 rotates relative to the first and second retaining plates 107 and 108. In this range, the engagement plate 139 and the fixed washer 138 frictionally slide with each other to generate a small hysteresis torque.

When the torsion angle becomes A in FIG. 14A and 14B, the outer teeth 112b come into contact with the inner teeth 107d and 108d, and the first and second retaining plates 107 and 108 are integrated with the hub 112. Rotate. Thereafter, as is apparent from FIGS. 10 and 11, a second coil spring 110 and a first coil are provided between the first and second retaining plates 107 and 108 and the first and second sub-plates 105 and 106. A spring 109 acts in series via the flange plate 103. At this time, the first coil spring 109 and the second coil spring 110 are both compressed, and low rigidity characteristics are obtained. Since the first coil spring 109 has lower rigidity than the second coil spring 110, the first coil spring 109 is compressed more than the second coil spring 110.

In this range, two third friction washers 128 frictionally slide between the friction plate 129 rotating integrally with the first and second retaining plates 107 and 108 and the first and second sub-plates 105 and 106. I do. As a result, a large hysteresis torque is generated.

When the torsion angle is B in FIG. 14, the end of the second coil spring 110 is connected to the first window holes of the first and second sub-plates 105 and 106 as shown in FIG. Then, the second coil spring 110 is compressed between the first and second retaining plates 107 and 108 and the first and second sub-plates 105 and 106. At this time, as shown in FIG. 13, the torque of the flange plate 103 is not transmitted from the first and second retaining plates 107 and 108, the rotation of the flange plate 103 is stopped, and the first coil spring 109 is not compressed. . That is, only the second coil spring 10 is compressed, and as a result, high torsional rigidity is obtained. When the second stop pin 132 contacts the end of the pin moving hole 106d, the relative rotation between the flange plate 103 and the first and second retaining plates 107 and 108 stops.

In this range, the two third friction washers 128 frictionally slide between the friction plate 129 rotating integrally with the first and second retaining plates 107 and 108 and the first and second sub-plates 105 and 106. . As a result, a large hysteresis torque is generated.

Further, in this embodiment, the first sub-plate 105 and the second sub-plate 106 are fixed to each other by the rivet 119 that also connects the frictional connection portion 102, so that the first stop pin of the above-described embodiment becomes unnecessary. .

In this embodiment, the flange plate 103 for connecting the first coil spring 9 and the second coil spring 10 in series is made of a single member, so that the cost is reduced.

1 is a longitudinal sectional view of a clutch disk assembly according to a first embodiment of the present invention. FIG. 4 is a plan view of a clutch disk assembly partially removed. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 4 is a torsional characteristic diagram of a clutch disk assembly. FIG. 6 is a longitudinal sectional view of a clutch disk assembly as a second embodiment. FIG. 3 is a plan view of a part of the clutch disk assembly with parts removed. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 3 is a schematic diagram showing torque transmission. FIG. 4 is a torsional characteristic diagram of a clutch disk assembly.

Explanation of reference numerals

2 Friction connection part 15 First core plate, second core plate 16 Friction material 17 Cushioning plate

Claims (6)

A first core plate extending in a circumferential direction;
A second core plate extending in the circumferential direction and facing the first core plate;
A cushioning plate disposed between the first and second core plates;
Two friction materials made of a composite material of metal and ceramic fixed to the outside of the first and second core plates;
A friction coupling of a clutch disk assembly comprising: The friction coupling portion of the clutch disk assembly according to claim 1, wherein the cushioning plate has a step in a radial direction. The first core plate and the cushioning plate have a fixed portion fixed to the clutch disc assembly on an inner peripheral portion,
The friction coupling part of the clutch disk assembly according to claim 1 or 2, further comprising a coupling member that couples the cushioning plate and the second core plate. The said connection member consists of two members which fix the circumferential direction both ends of the said cushioning plate and the said 2nd core plate, The said friction material is arrange | positioned between the circumferential directions of both said connection members, The said 1st. 3. The friction coupling part of the clutch disk assembly according to any one of the above items 3. The friction coupling portion of the clutch disk assembly according to claim 3, wherein a hole is formed in the first core plate at a position corresponding to the coupling member. A clutch disc body,
A plurality of friction coupling portions according to any one of claims 1 to 5, which are arranged on an outer periphery of the clutch disk main body.
A clutch disk assembly including:

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