JPH09112569A - Damper disk assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the amount of a hysteresis torque in a damper disk assembly in order to attenuate a twisting vibration. SOLUTION: A clutch disk assembly 101 furnishes plates 103 and 104, a flange 105, a coil spring 107, and a hysteresis torque generating mechanism 108. The plates 103 and 104 are fixed providing a clearance in the axial direction. The flange 105 is provided between the plates 103 and 104. The coil spring 107 connects the plates 103 and 104, and the flange 105 in the circumferential direction. The hysteresis torque generating mechanism 108 is provided between the clutch plate 103 and the flange 105, being locked unrotatable relatively to the flange 105, and it has the first friction member to abut to the clutch plate 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper disk assembly, and more particularly to a damper disk assembly having a hysteresis torque generating mechanism for damping torsional vibration.

[0002]

2. Description of the Related Art A clutch disc assembly used for a clutch device of a vehicle mainly comprises a clutch plate and a retaining plate as input side members, a hub having a flange and connected to a shaft extending from the transmission side, A coil spring arranged so as to be compressed in the circumferential direction when the clutch plate and the retaining plate and the flange rotate relative to each other, and a direction in which the relative rotation is obstructed by friction when the plates and the flange rotate relative to each other. And a hysteresis torque generating mechanism that generates a hysteresis torque that acts on. When the torsional vibration is transmitted by the coil spring and the hysteresis torque generating mechanism, hysteresis is generated in the relationship between the relative torsion angle and the torque between the plate on the input side and the hub on the output side. Has become. The torsional vibration is damped by the hysteresis loss generated at this time.

The hysteresis torque generating mechanism is, for example,
An annular friction member that abuts the flange, an annular plate member that is disposed on the side of the annular friction member and that engages so as to rotate integrally with the retaining plate, and an annular biasing member that biases the plate member toward the flange side. It consists of
These annular members are arranged radially inward of the coil spring and between the plates and the flange of the hub.

[0004]

In the conventional hysteresis torque generating mechanism described above, the annular friction member integrally rotates with either one of the annular plate member and the flange during relative rotation, and relatively rotates with the other to generate friction. To do. Here it cannot be determined which side of the annular friction member is the friction side. As a result, the hysteresis torque is difficult to stabilize.

An object of the present invention is to stabilize the magnitude of hysteresis torque in a damper disk assembly for damping torsional vibration.

[0006]

A damper disk assembly according to a first aspect of the present invention includes a first and a third rotating disk members and a second rotating disk member.
A rotating disk member, an elastic member, and a hysteresis torque generating mechanism are provided. The first and third rotating disc members are fixed to each other with a gap in the axial direction. The second rotary disc member is arranged so as to be relatively rotatable between the first and third rotary disc members. The elastic member circumferentially connects the first and third rotating disc members and the second rotating disc member. The hysteresis torque generating mechanism is disposed between the first rotating disk member and the second rotating disk member, is locked to the second rotating disk member in a relatively non-rotatable manner, and contacts the first rotating disk member. It has a friction member.

In this damper disk assembly, for example, when the first and third rotating disc members rotate, the torque is transmitted to the second rotating disc member via the elastic member. When torsional vibration is input to the first and third rotating disc members, periodic relative rotation occurs between both members and the second rotating disc member. At this time, hysteresis occurs in the relationship between the twist angle and the torque. At this time, the elastic member is compressed, and the first friction member slides on the first rotating disk member in the hysteresis torque generating mechanism to generate friction, thereby generating hysteresis torque. Here, since the first friction member is locked to the second rotating disc member so as not to rotate relative to it, the sliding surface of the first friction member is determined, and as a result, the magnitude of the hysteresis torque is stabilized.

According to another aspect of the damper disk assembly of the present invention, a hole is formed in the second rotating disk member, and the first friction member has a first protrusion that is inserted into the hole. In the damper disk assembly according to the third aspect, the hysteresis torque generating mechanism further includes the second friction member, the plate member, and the urging member. The second friction member is fixed to the third rotating disk member side of the second rotating disk member so as not to rotate relative to each other.
The plate member engages with the third rotating disc member such that it cannot rotate relative to the third rotating disc member and contacts the second friction member. The biasing member is supported by the third rotating disc member and biases the plate member toward the second friction member.

According to another aspect of the damper disk assembly of the present invention, the second rotating disk member has a hole formed therein,
The friction member has a second protrusion that is inserted into the hole. In the damper disk assembly according to the fifth aspect, the hysteresis torque generating mechanism further includes a second friction member, a plate member, and a biasing member. The second friction member is fixed to the third rotating disk member side of the second rotating disk member so as not to rotate relative to each other. The plate member is engaged with the third rotating disc member such that the plate member cannot rotate relative to the third rotating disc member and is in contact with the second friction member. The biasing member is supported by the third rotating disc member and biases the plate member toward the second friction member. A hole is formed in the second rotating disk member. The first friction member and the second friction member respectively have first and second protrusions that are inserted into the holes and engage with each other.

Here, since the first friction member and the second friction member are engaged with each other, they are integrated with the second rotary disk member and can be used as a sub-assembly when the entire apparatus is assembled. The damper disk assembly according to claim 6,
A first rotating disk member, a second rotating disk member, an elastic member, a plurality of friction members, and a biasing member are provided. The second rotating disk member is arranged to face the first rotating disk member. The elastic member circumferentially connects the first rotating disk member and the second rotating disk member. The friction member is locked to one of the first and second rotating disk members such that the friction member cannot rotate relative to the other, and is in contact with the other. The urging member urges the first rotating disk member and the second rotating disk member in directions toward each other. When the torsional vibration is input to the first rotary disc member, periodic relative rotation occurs between the first rotary disc member and the second rotary disc member. At this time, hysteresis occurs in the relationship between the twist angle and the torque. That is, the elastic member is compressed, and the plurality of friction members slide on the other of the first and second rotating disk members to generate friction, thereby generating hysteresis torque. Here, since the friction members are locked to one of the first and second rotating disk members so that they cannot rotate relative to each other, the sliding surfaces of the plurality of friction members are determined, and as a result, the magnitude of the hysteresis torque is reduced. Stabilize. Further, the plurality of friction members do not fall off from the first and second rotating disc members.

In the damper disk assembly according to the seventh aspect, the friction member is detachably fixed to one of the first and second rotating disc members. Here, the friction member can be previously fixed to the rotating disc member to form the sub-assembly. Further, the friction member can be easily removed from the rotating disc member. In the damper disk assembly according to claim 8, a hole is formed in one of the first and second rotating disk members,
An engaging portion that engages with the hole is formed in the friction member.

In the damper disk assembly according to the ninth aspect, a plurality of biasing members are arranged corresponding to the friction members. A damper disk assembly according to a tenth aspect of the present invention further includes a third rotating disk member arranged so as to sandwich the second rotating disk member between the damper disk assembly and the first rotating disk member. The urging member is arranged between the second rotating disk member and the third rotating disk member, and urges the second rotating disk member and the third rotating disk member away from each other.

In the damper disk assembly according to the eleventh aspect, the biasing member is fixed to either one of the second rotating member and the third rotating member. As a result, the biasing member does not fall off the rotating disc member.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A clutch disc assembly 1 shown in FIGS. 1 and 2 has a clutch plate 3 and a retaining plate 4 as input members and a hub 5 as an output member having a flange 5. 6
And four coil springs 7 arranged between the plates 3 and 4 and the flange 5, a hysteresis torque generating mechanism 8 and a friction coupling portion 9.

The clutch plate 3 and the retaining plate 4 are plate members having a substantially disc shape. Both plates 3 and 4 have a central hole, and are rotatably fitted to the outer periphery of the hub 6. The plates 3 and 4 are fixed to each other by a plurality of stop pins 15 on the outer peripheral side. Hub 6
At the center, a spline hole 6a that engages with a shaft (not shown) extending from the transmission side is formed. The flange 5 extends radially outward between the plates 3 and 4 and has four window holes 5a arranged in the circumferential direction. Coil springs 7 are arranged in the window holes 5a, respectively. Cut-raised portions 3a and 4a are formed in portions of the plates 3 and 4 corresponding to the window holes 5a. The cut-and-raised parts 3a and 4a restrict the movement of the coil spring 7 in the radially outward and axial directions.

As is apparent from FIG. 2, in the flange 5, four notches 5b formed on the outer peripheral edge are formed between the window holes 5a. The stop pin 15 is arranged in the notch 5b. A predetermined gap is secured between the stop pin 15 and the notch 5b in the circumferential direction.
As a result, the clutch plate 3 and the retaining plate 4 can rotate relative to the flange 5 within a predetermined angle.

The hysteresis torque generating mechanism 8 is arranged at four places, each of which is composed of a small friction member 20 and a leaf spring 21. The friction member 20 is shown in FIG.
As shown in FIG. 4, it comprises a friction plate portion 20a, a protruding portion 20b extending from the friction plate portion 20a, and an engaging portion 20c formed at the tip of the protruding portion 20b. The friction member 20 is a resin molded product and is easy to process. The friction member 20 is arranged axially between the clutch plate 3 and the flange 5 and between the window portion 5a of the flange 5 and the coil spring 7 in a plane. The protrusion 20b of the friction member 20 extends in a hole formed in the clutch plate 3, and an engaging portion 20c is formed at the tip of the protrusion 20b on the opposite side of the clutch plate 3. The engaging portion 20c has a snap shape, whereby the friction member 20 is locked to the clutch plate 3 so as not to fall off.

The leaf spring 21 in each hysteresis torque generating mechanism 8 is arranged between the flange 5 and the retaining plate 4 and at a position corresponding to the friction member 20. The leaf spring 21 is fixed to the retaining plate 4 by a rivet 22 at the center in the circumferential direction. Leaf spring 21
As is apparent from FIG. 4, both ends in the circumferential direction extend toward the flange 5 and are in contact with each other. In this state, the leaf spring 21 is compressed in the axial direction and urges the flange 5 and the retaining plate 4 so as to separate from each other in the axial direction. As a result, the flange 5 and the clutch plate 3 are urged in directions toward each other.

As described above, the friction member 20 and the leaf spring 21 cannot be removed from the clutch plate 3 and the retaining plate 4, respectively. The friction connecting portion 9 is composed of a plurality of cushioning plates 11 and friction facings 12 fixed to both surfaces of the cushioning plates 11. Each cushioning plate 11
Are connected to the outer periphery of the clutch plate 3 by rivets 10. A flywheel (not shown) is arranged on the left side of the friction connecting portion 9 in FIG. Torque is input to the disc assembly 1.

Next, the operation will be described. Friction connection 9
Is pressed by a flywheel (not shown), torque is input from the flywheel to the clutch disc assembly 1. This torque is output to a shaft (not shown) extending from the transmission side through the plates 3 and 4, the coil spring 7, the flange 5 and the hub 6.

When torsional vibration is input to the clutch disc assembly 1 from the flywheel side, the plates 3 and 4 and the flange 5 periodically rotate relative to each other. In the hysteresis torque generating mechanism 8, the four friction members 20 rotate integrally with the clutch plate 3 and frictionally slide on the flange 5. At this time, the coil spring 7 and the hysteresis torque generating mechanism 8 cause hysteresis in the relationship between the relative twist angle and the torque. The torsional vibration is damped by the hysteresis loss at this time.

In the embodiment described above, the friction member 2
Since 0 is engaged with the clutch plate 3 in a relatively non-rotatable manner, the sliding surface of the friction member 20 is determined and the magnitude of the hysteresis torque is stabilized. Further, since the four hysteresis torque generating mechanisms 8 are arranged between the circumferential direction of the window hole 5a, that is, radially outward of the conventional structure, the hysteresis torque is increased, and as a result, the hysteresis loss is increased.

Since the friction member 20 and the leaf spring 21 constituting each hysteresis torque generating mechanism 8 are small members independent of each other, they do not take up much space. This is because it is not necessary to form the friction member 20 in an annular shape because the friction member 20 is fitted and fixed to the clutch plate 3. Further, the friction member 20 can be easily attached to and detached from the clutch plate 3. [Modification] As shown in FIG. 5, the hysteresis torque generating mechanism 8 may be arranged radially outward of the window hole 5a of the flange 5. In this case, since the effective radius becomes large, the hysteresis torque becomes even higher. Second Embodiment A clutch disc assembly 100 shown in FIGS. 6 and 7 is
Clutch plate 103 and retaining plate 104 as input side members, hub 106 as output side member having flange 105, both plates 103, 10
4 and the flange 105, the four coil springs 107, and the hysteresis torque generating mechanism 108.
And a friction coupling portion 109.

The clutch plate 103 and the retaining plate 104 are plate members each having a substantially disc shape. Both plates 103, 104 have a central hole,
It is rotatably fitted to the outer periphery of the hub 106. The plates 103 and 104 are fixed to each other on the outer peripheral side by a plurality of stop pins 115. A spline hole 106a that engages with a shaft (not shown) extending from the transmission side is formed at the center of the hub 106. Further, the flange 105 extends outward in the radial direction between the plates 103 and 104 and has four window holes 10 arranged in the circumferential direction.
5a. Coil springs 107 are arranged in the window holes 105a. Plate 1
Cut and raised portions 103a and 104a are formed in the portions of 03 and 104 corresponding to the window 105a. The cut-and-raised portions 103a and 104a allow the coil spring 10
No. 7 is restricted from moving radially outward and axially.

Four notches 105c are formed in the outer peripheral edge of the flange 105 between the window holes 105a. The stop pin 11 is provided in the notch 105c.
5 are arranged. Stop pin 115 and notch 10
A predetermined gap is secured between the groove 5c and the circumferential direction of 5c.
As a result, the clutch plate 3 and the retaining plate 4 can rotate relative to the flange 105 within a predetermined angle.

The hysteresis torque generating mechanism 108 comprises a first friction member 120, a second friction member 121, a friction plate 122 and a cone spring 123. In the flange 105, a plurality of holes 105b penetrating in the axial direction are formed radially inward of the window hole 105a. The first friction member 120 is a resin-made annular member, and is arranged between the clutch plate 103 and the inner peripheral portion of the flange 105. The first friction member 120 has a protrusion 120 extending into the hole 105 b of the flange 105.
a is formed. Accordingly, the first friction member 120
Is designed to rotate integrally with the flange 105.

The second friction member 121 is also an annular member made of resin, and is in contact with the surface of the flange 105 on the transmission side. The second friction member 121 is formed with a protrusion 121a extending into the hole 105b of the flange 105. The tip of the protruding portion 121a has a first friction member 120.
Is in contact with the tip of the protruding portion 120a. In this way, the second annular friction member 121 also rotates integrally with the flange 105.

The friction plate 122 is an annular plate member and is in contact with the surface of the second friction member 121 on the transmission side. Further, the inner periphery of the friction plate 122 has a plurality of engaging portions 12 extending toward the transmission side.
2a is formed. The engaging portion 122a is engaged with a notch formed in the inner peripheral edge of the retaining plate 104 so as not to be rotatable relative to the retaining plate 104 but to be movable in the axial direction.
The cone spring 123 is arranged in a compressed state between the friction plate 122 and the retaining plate 104. As a result, the friction plate 122 is brought into pressure contact with the second friction member 121, and the clutch plate 103 is brought into contact with the first friction member 121.
It is pressed against the friction member 120.

The friction coupling portion 109 is composed of a plurality of cushioning plates 111 and friction facings 112 fixed to both surfaces of the cushioning plates 111. Each cushioning plate 111 is connected to the outer periphery of the clutch plate 103 by a rivet 110. Next, the operation will be described.

When the friction coupling portion 109 is pressed by a flywheel (not shown), torque is input to the clutch disc assembly 101. This torque is
It is output to a shaft (not shown) extending from the transmission side via 104, the coil spring 107, the flange 105, and the hub 106. When torsional vibration is input to the clutch disc assembly 101 from the flywheel side, the plates 103 and 104 and the flange 105 periodically rotate relative to each other. Hysteresis torque generation mechanism 1
In 08, the first and second friction members 120 and 121 rotate integrally with the flange 105, and frictionally slide on the clutch plate 103 and the friction plate 122, respectively. At this time, the coil spring 107 and the hysteresis torque generating mechanism 108 cause hysteresis in the relationship between the relative twist angle and the torque. As a result, the torsional vibration is damped.

In particular, the first and second friction members 120, 12
Since 1 is fixed to the flange 105 so as not to rotate relative to each other, the sliding surfaces of these friction members are determined. As a result, the magnitude of the hysteresis torque generated by the hysteresis torque generating mechanism 108 is stable. [Modification] The first friction member 120 and the second friction member 121 may be engaged in a non-separable manner in the axial direction. In the longitudinal sectional view shown in FIG. 9, the protrusion 120b of the first friction member 120 has
A groove 120c having a hexagonal cross section is formed. The protrusion 121b of the second friction member 121 has a hexagonal cross-section that fits in the groove 120c. In this way, the first friction member 120 and the second friction member 121 are engaged with each other by their protrusions, so that they cannot be separated from the flange 105. As a result, both the friction members can be assembled to the flange 105 in advance when the device is assembled to form a sub-assembly. Further, the processing of the engaging portion between both friction members is easy because both members are made of resin.

[0032]

In the damper disk assembly according to the present invention, since the friction member is locked to the one rotating disk member so that it cannot rotate relative to the other, the sliding surface of the friction member is determined, and as a result, the hysteresis torque is increased. Size is stable. When the plurality of friction members are engaged with each other through the holes of the rotary disc member, the rotary member and the friction member can be used as a sub-assembly when the entire apparatus is assembled.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the clutch disc assembly with the retaining plate removed.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a diagram corresponding to FIG. 2 in a modified example.

FIG. 6 is a plan view of a clutch disc assembly according to a second embodiment.

7 is a vertical sectional view taken along line VII-VII of FIG.

FIG. 8 is a partially enlarged view of FIG. 7;

FIG. 9 is a cross-sectional view showing engagement of friction members with each other in a modified example.

[Explanation of symbols]

 1 Clutch Disc Assembly 3 Clutch Plate 4 Retaining Plate 7 Coil Spring 8 Hysteresis Torque Generation Mechanism

Claims (11)

[Claims] 1. A first and a third rotating disc member fixed axially at intervals, a second rotating disc member disposed between the first and the third rotating disc members, An elastic member that circumferentially connects the first and third rotating disc members and the second rotating disc member, and is disposed between the first rotating disc member and the second rotating disc member, and A damper disk assembly comprising: a hysteresis torque generating mechanism having a first friction member that is locked to the second rotating disk member so as not to rotate relative to the first rotating disk member. 2. The damper disk assembly according to claim 1, wherein a hole is formed in the second rotating disk member, and the first friction member has a first protrusion that is inserted into the hole. . 3. The hysteresis torque generating mechanism includes a second friction member locked to the third rotating disk member side of the second rotating disk member such that the second rotating member does not rotate relative to the third rotating disk member, and the third rotating disk member. A plate member that is relatively non-rotatably engaged with and abuts against the second friction member, and a biasing member that is supported by the third rotating disk member and biases the plate member toward the second friction member. The damper disk assembly according to claim 1, which has. 4. The damper disk assembly according to claim 3, wherein a hole is formed in the second rotating disk member, and the second friction member has a second protrusion that is inserted into the hole. . 5. The hysteresis torque generating mechanism includes a second friction member locked to the third rotating disc member side of the second rotating disc member such that the second rotating disc member cannot rotate relative to the third rotating disc member, and the third rotating disc member. A plate member that is relatively non-rotatably engaged with and abuts against the second friction member, and a biasing member that is supported by the third rotating disk member and biases the plate member toward the second friction member. A hole is formed in the second rotary disk member, and the first friction member and the second friction member are respectively inserted into the hole and have first and second protrusions that engage with each other. The damper disk assembly according to claim 1, which has. 6. A first rotating disk member, a second rotating disk member arranged to face the first rotating disk member, the first rotating disk member and the second rotating disk member. A plurality of friction members that are locked to one of the first and second rotating disc members such that they cannot rotate relative to each other and abut against the other; And a urging member for urging the second rotating disk member toward each other. 7. The damper disk assembly according to claim 6, wherein the friction member is detachably fixed to the one of the first and second rotating disk members. 8. A hole is formed in the one of the first and second rotating disk members, and an engaging portion that engages with the hole is formed in the friction member. The damper disk assembly described in. 9. The damper disk assembly according to claim 6, wherein a plurality of the biasing members are arranged corresponding to the friction members. 10. The second rotary disc member is provided between the second rotary disc member and the second rotary disc member.
It further comprises a third disc member arranged so as to sandwich the rotating disc member, wherein the biasing member is arranged between the second rotating member and the third rotating member, and the second rotating disc member. The damper disk assembly according to any one of claims 6 to 9, wherein the damper disk assembly and the third rotating disk member are urged in directions away from each other. 11. The biasing member is fixed to either one of the second rotating member and the third rotating disk member,
The damper disk assembly according to claim 10.