JPH07293580A - Elastic connection assembly, damper device, and damper disc assembly - Google Patents

Abstract

PURPOSE:To enhance mount operating performance by providing a first seat member abutting against one end of a spring member, and providing a second seat member which abuts against the other end, and is engaged with the first seat member in such a way that it can be relatively moved in the telescopic direction of the spring member. CONSTITUTION:The assembly is made up of each coil spring 6a, and of a first and a second seat member 11 and 12 which abut against both ends of each coil spring, and both the seat members are made of resin. The first seat member 11 has a cylinder section 11a at the second seat member 12 side, the cylinder section 11a is disposed in the inside of the coil spring 6a, and a draw-down section 11b is formed at the tip end side. The second seat member 12 has a projected section 12a at the first seat member 11 side, a head section 12b larger in diameter than the projected section 12a is formed at the tip end of the projected section 12a, and the head section 12b is inserted into the inside of the cylinder section 11a across the draw-down section 11b out of the cylinder section 11a. Both the first and second seat members 11 and 12 can be moved in the direction that each coil spring 6a is contracted in a state of engagement. Since the first and second seat members are engaged with each other, the assembly can thereby be easily mounted on the other means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic connecting assembly, a damper device using the elastic connecting assembly, and a separated hub type damper disk assembly using the elastic connecting assembly.

[0002]

2. Description of the Related Art For example, a damper disk assembly used for a clutch disk of a vehicle has an input side plate, an output side hub integrally having a flange on the outer circumference, and an input side plate and a flange elastically in the circumferential direction. And an elastic coupling assembly for coupling. Further, there is also provided a separated hub type damper disk assembly in which the flange is separated from the hub and the both are circumferentially connected by an elastic connection assembly including a coil spring and a spring seat. In this type of damper disk assembly, the relative twist angle between the input side plate and the hub is widened, and further two-step twist characteristics of low rigidity and high rigidity are obtained. Further, a first friction member is disposed between the input side plate and the hub and a second friction member is disposed between the separation flange and the input side plate to generate the hysteresis torque.
A friction member is arranged.

In such a separated hub type damper disk assembly, when a small torsional vibration is transmitted, relative rotation occurs between the input side plate and the separation flange and the output side hub. At this time, the low-rigidity elastic member repeatedly expands and contracts, and the first friction member slides between the input side plate and the separation flange to generate a small frictional force. Further, when a large torsional vibration is transmitted, relative rotation occurs between the input side plate and the separation flange and the output side hub. At this time, the elastic member repeatedly expands and contracts between the input side plate and the separation flange, and the second friction member slides between the input side plate and the separation flange to generate a large friction force. As described above, each vibration is effective due to the characteristics of low rigidity and small friction force for small torsional vibrations and the characteristics of high rigidity and large frictional force for large torsional vibrations. Decays to.

[0004]

SUMMARY OF THE INVENTION In the above conventional technique,
It is difficult to assemble the elastic connection assembly in place. That is, since the coil spring and the spring seat are very small and it is necessary to push them into a predetermined position while receiving the reaction force of the coil spring,
Workability is poor.

Further, in the above-mentioned conventional separated hub type damper disk assembly, in order to damp torsional vibration having a small displacement angle at the time of idling, the rigidity of the coil spring functioning at the first stage is made as low as possible. There is a need. On the other hand, in order to damp torsional vibration having a large displacement angle such as low frequency vibration, the rigidity of the coil spring functioning in the second stage must be increased. Therefore, in the conventional device, when the torsional characteristic changes from the first stage to the second stage, the characteristic changes abruptly, and when the torsional vibration in the range including this change point is transmitted, There is a shock that causes noise.

An object of the present invention is to improve the workability of mounting the elastic connection assembly. Another object of the present invention is to facilitate the assembly and disassembly of the spring member and the seat member of the elastic coupling assembly. Yet another object of the present invention is to generate a frictional force in the elastic coupling assembly when the spring member expands and contracts.

Still another object of the present invention is to stabilize the frictional force. Still another object of the present invention is to smooth the change in torsion characteristics between the first step and the second step in the separated hub type damper disk assembly.

[0008]

An elastic coupling assembly according to the present invention comprises a spring member, a first sheet member and a second sheet member. The first sheet member contacts one end of the spring member. The second sheet member abuts on the other end of the spring member and engages with the first sheet member so as to be relatively movable in the expansion / contraction direction of the spring member.

The first and second sheet members are preferably removable. The first sheet member and the second sheet member are
It is preferable to have first and second sliding portions that slide with each other. It is preferable to further include a biasing member that biases the first sliding portion and the second sliding portion to each other. A damper device according to the present invention includes an input side rotating body, an output side member, and an elastic connection assembly. The elastic connecting assembly includes a spring member, a first sheet member and a second sheet member, and elastically connects the input side rotating body and the output side member in the circumferential direction. The first sheet member contacts one end of the spring member. The second sheet member abuts on the other end of the spring member and engages with the first sheet member so as to be relatively movable in the expansion / contraction direction of the spring member.

The first and second sheet members are preferably removable. The first sheet member and the second sheet member are
It is preferable to have first and second sliding portions that slide with each other. The elastic coupling assembly preferably includes a biasing member that biases the first sliding portion and the second sliding portion toward each other. A damper disk assembly according to the present invention includes an input side rotating body, an output side hub, a disc plate, an elastic connection assembly, and a second spring member. The disc plate is arranged on the outer circumference of the hub. The elastic connection assembly includes a first spring member, a first seat member and a second seat member, and elastically connects the disc plate and the output hub in the circumferential direction. The first sheet member contacts one end of the first spring member. The second seat member abuts on the other end of the first spring member and engages with the first seat member so as to be relatively movable in the expansion / contraction direction of the first spring member. The second spring member elastically connects the input side rotating body and the disc plate in the circumferential direction, and has higher rigidity than the first spring member.

The first and second sheet members are preferably removable. It is preferable that the first sheet member and the second sheet member respectively have first and second sliding portions that slide with each other. The elastic coupling assembly preferably includes a biasing member that biases the first sliding portion and the second sliding portion toward each other. The first sliding portion and the second sliding portion preferably gradually increase the frictional force as the compression of the first spring member progresses.

[0012]

In the elastic coupling assembly according to the present invention, since the first sheet member and the second sheet member are engaged with each other,
The spring member and both sheet members can be integrated and mounted on another device, and the assembling workability is improved. When the first and second sheet members are detachable, it is easy to assemble and disassemble the spring member and the sheet member. When the first sheet member and the second sheet member respectively have the first and second sliding portions that slide with each other, a desired frictional force can be obtained when the spring member expands and contracts. When the urging member that urges the first sliding portion and the second sliding portion to each other is provided, the frictional force is stable.

In the damper device according to the present invention, the same action as in the case of the elastic connection assembly is produced. In the damper disk assembly according to the present invention, the same operation as that of the elastic coupling assembly and the damper device occurs. Besides, the first
When the sliding portion and the second sliding portion gradually increase the frictional force as the compression of the first spring member progresses, the change in the torsion characteristics between the first step and the second step is smoothed. it can. This reduces the shock between the first stage and the second stage.

[0014]

EXAMPLES damper disk assembly 1 according to an embodiment of the present invention shown in the first embodiment Figure 1 arranged on the right side of FIG. 1 the torque from the engine which is arranged on the left side of FIG. 1 (not shown) It is a device for transmitting and shutting off the transmission (not shown). In FIG. 1, O-O is a rotation axis of the damper disk assembly 1. The R ₁ direction in FIG. 2 is the rotation direction of the damper disk assembly 1.

At the center of the damper disk assembly 1, a hub 2 connected to a transmission shaft (not shown) is arranged. The hub 2 has a spline hole 2a at the center thereof. Further, the hub 2 is formed with a small flange portion 2b projecting to the outer peripheral side, and a plurality of protrusions 2b are formed on the outer periphery of the flange portion 2b at equal intervals in the circumferential direction. As shown in FIG. 2, receiving portions 2d for receiving both ends of an elastic connection assembly 6 to be described later are cut out and formed at two locations in the radial direction of the flange portion 2b.

A separation flange 3 is arranged on the outer periphery of the protrusion 2b of the hub 2. The separation flange 3 is a disc-shaped plate. The protrusion 2c of the hub 2 on the inner peripheral side of the separation flange 3
A notch 3a is formed in the portion corresponding to. A predetermined gap is secured between the notch 3a and the projection 2c in the circumferential direction, whereby the hub 2 and the separation flange 3 are rotatable by a predetermined angle. In addition, in the neutral state shown in FIG. 2, the protrusion 2c is R ₂ from the center in the notch 3a.
It is arranged on the side (opposite to the rotation direction).

On the inner peripheral side of the separation flange 3, two receiving portions 3b corresponding to the receiving portion 2d of the hub 2 are formed by notching receiving portions 3b. An elastic connection assembly 6 is arranged in each of the receiving portions 2d and 3b. Elastic connection assembly 6
As shown in FIG. 3, the coil spring 6a includes a coil spring 6a, a first sheet member 11 that abuts on both ends of the coil spring 6a, and a second sheet member 12, respectively. The first sheet member 11 and the second sheet member are made of resin. The first sheet member 11 has a tubular portion 11a extending toward the second sheet member 12 side. The tubular portion 11a is arranged inside the coil spring 6a. A constricted portion 11b having a reduced diameter is formed on the tip end side of the tubular portion 11a. On the other hand, the first sheet member 12 is the first sheet member 1
It has a protrusion 12a extending to the first side. Protrusion 12a
A head portion 12b having a larger diameter than the protruding portion 12a is formed at the tip of the. The head portion 12b is inserted into the tubular portion 11a from the inside of the tubular portion 11a beyond the constricted portion 11b. The inner surface of the constricted portion 11b and the outer surface of the head portion 12b are curved so that the head portion 12b can easily be inserted into the tubular portion 11a beyond the constricted portion 11b. It should be noted that the head portion 12b is formed with a retaining flange portion so that the second sheet member 12 does not easily come off the first sheet member 11 in the state of FIG. The protruding portion 12a has a tapered surface 12 whose diameter gradually increases from the intermediate portion toward the root side.
have c.

In the engaged state shown in FIG. 3, the first sheet member 1
The first sheet member 12 and the second sheet member 12 can move in a direction in which they approach each other, that is, in a direction in which the coil spring 6a contracts. Further, the constricted portion 11b of the first sheet member 11 is
The protrusion 12a of the second sheet member 12 is biased so as to be tightened. Therefore, when the first sheet member 11 and the second sheet member 12 move relative to each other, a frictional force is generated between the constricted portion 11b and the protruding portion 12a.

The separation flange 3 has a plurality of window holes 3c extending in the circumferential direction at the middle portion in the radial direction. Further, a plurality of notches 3d are formed on the outer peripheral edge of the separation flange 3 at equal intervals in the circumferential direction. On both sides of the separation flange 3, a clutch plate 4 and a retaining plate 5 as an input side rotating body are arranged. The clutch plate 4 and the retaining plate 5 are a pair of substantially disk-shaped members, and are rotatably engaged with the outer peripheral side of the hub 2. The clutch plate 4 and the retaining plate 5 are fixed by a contact pin 20 on the outer peripheral portion. The contact pin 20 is arranged so as to be inserted into the notch 3d formed in the outer peripheral edge of the separation flange 3. Contact pin 2
A predetermined gap is secured in the circumferential direction between 0 and the notch 3d. As a result, the clutch plate 4, the retaining plate 5, and the separation flange 3 can rotate relative to each other, but when the contact pin 20 contacts the notch 3d, the relative rotation stops.

A plurality of cushioning plates 22 are provided on the outer peripheral edge of the clutch plate 4 by means of a plurality of rivets 21.
Are connected. Friction facings 23 are fixed on both sides of the cushioning plate 22. A flywheel (not shown) on the engine side is arranged on the left side of the friction facing 23 in FIG. 1, and when the friction facing 23 is pressed by the flywheel (not shown) by a pressure plate (not shown), the damper is pressed. Engine-side torque is input to the disk assembly 1.

The retaining plate 4 and the clutch plate 5 have cut-and-raised portions 4a, 5a which are cut and raised axially outward at positions corresponding to the window holes 3c of the separation flange 3, respectively. The cut-and-raised parts 4a and 5a
The second coil spring 7 is arranged in the window hole 3c of the separation flange 3. The wire diameter and the coil diameter of the second coil spring 7 are larger than those of the first coil spring 6, and the rigidity thereof is also high. The torque of the plates 4 and 5 is transmitted to the separation flange 3 via the second coil spring 7.

A friction washer 8 and a cone spring 9 are arranged between the inner peripheral portion of the retaining plate 5 and the inner peripheral portion of the separation flange 3. Friction washer 8
Are engaged so as to rotate integrally with the retaining plate 5. An outer peripheral end of the cone spring 9 is locked to the retaining plate 5, and an inner peripheral end of the cone spring 9 urges the friction washer 8 to the inner peripheral side surface of the separation flange 3.

The inner peripheral portion of the clutch plate 4, the inner peripheral portion of the separation flange 3, the flange portion 2b of the hub 2 and the projection 2 are formed.
A second friction washer 19 is disposed between the second friction washer 19 and c. The second friction washer 19 includes the clutch plate 4,
Inner peripheral side surface of the separation flange 3, the flange portion 2 of the hub 2
It is in contact with b and the protrusion 2c. Next, the operation of the damper disk assembly 1 will be described.

When the facing 23 is pressed against a flywheel (not shown) on the engine side, the torque of the flywheel on the engine side is input to the clutch plate 4 and the retaining plate 5. This torque is the second
It is transmitted to the hub 2 via the coil spring 7, the separation flange 3, and the elastic connection assembly 6, and further transmitted to a transmission-side shaft (not shown).

Flywheel on the engine side (not shown)
When torsional vibration with a small displacement angle is transmitted from the damper disk assembly 1 to the damper disk assembly 1, relative rotation occurs between the plates 4 and 5 and the separation flange 3 and the hub 2. At this time, the second
The coil spring 7 repeatedly expands and contracts, the first coil spring 6a of the elastic coupling assembly 6 repeatedly expands and contracts, and
Constricted portion 11b of sheet member 11 and second sheet member 12
The protrusion 12a slides to generate a predetermined frictional force. At this time, the torsional vibration with a small displacement angle is damped due to the characteristics of low rigidity and small friction force.

When a torsional vibration having a large displacement angle is transmitted to the damper disk assembly 1, the separation flange 3
And the hub 2 rotate integrally, and both of them and the plates 4, 5
Relative rotation occurs between and. At this time, the first friction washer 8 slides on the separation flange 3 to generate a large frictional force. Due to the characteristics of high rigidity and large frictional force at this time, torsional vibration with a large displacement angle can be effectively damped.

The torsional characteristics of the damper disk assembly 1 will be described with reference to the graphs of FIGS. 7 and 8. In addition, these graphs are obtained by fixing the clutch plate 4 and the retaining plate 5 to another device so as not to rotate and rotating the hub 2 with respect to both plates 4 and 5. In FIG. 8 corresponding to the circle A portion of FIG. 7, a portion B having an intermediate characteristic is formed between the characteristic of the first stage and the characteristic of the second stage. This is the protrusion 1 of the second sheet member 12.
Since 2a has the tapered surface 12c that gradually becomes thicker toward the root, when the torsion angle increases and the compression of the first coil spring 6 progresses, the constricted portion 11b and the protruding portion 1 are formed.
This is because the frictional force generated between 2a and 2a gradually increases. In this way, since the characteristic of the first stage is gently changed to the characteristic of the second stage, even if the torsional vibration in the range including this change point is transmitted, shock is unlikely to occur. Second Embodiment The elastic connection assembly 6 shown in FIG. 4 further has a C ring 25. The C ring 25 is fitted around the constricted portion 11b of the second sheet member 11, and the constricted portion 11b is formed.
Is biased to the protrusion 12a. The biasing force of the C ring 25 can stabilize the frictional force generated between the constricted portion 11b and the protruding portion 12a. Furthermore, by changing the C ring 25, the magnitude of the frictional force generated between the constricted portion 11b and the protruding portion 12a can be changed. Third Embodiment An elastic connection assembly 36 shown in FIGS. 7 and 8 is a box-shaped first sheet member 31 and second sheet member 3 having one opening.
2 and a coil spring 36a. The first sheet member 31 is larger than the second sheet member 32, and the opening side portion of the second sheet member 32 is inserted into the opening of the first sheet member 31. As shown in FIG. 8, locking portions 31 a are formed on both sides of the opening-side inner surface of the first sheet member 31. Then, on the outer surfaces on both sides of the second sheet member 32,
A hole 32a extending in the longitudinal direction is formed. In the assembled state shown in FIG. 7, the engaging portion 31a is inserted into the hole 32a. Thereby, the first sheet member 31 and the second sheet member 31
The seat 32 is engaged so as not to be easily disengaged.
Further, the first sheet member 31 and the second sheet member 32 are movable relative to each other.

The coil spring 36a is disposed in the first seat member 31 and the second seat member 32, and both ends thereof are in contact with the inner surfaces of the first seat member 31 and the second seat member 32, respectively. A leaf spring 35 is arranged between one side wall of the first sheet member 31 and the second sheet member 32. One end of the leaf spring 35 is engaged with the outer surface of the second sheet member 32. The intermediate portion 35a of the leaf spring 35 urges the inner surface side of the first sheet member 31 outward. The end portion 35b extending from the intermediate portion 35a is bent further outward from the intermediate portion 35a. First sheet member 31 and second sheet member 32
The wall opposite to is abutting. The walls are urged to each other by the urging force of the leaf spring 35.

This elastic connection assembly 36 is used in place of the elastic connection assembly 6 of the above-mentioned embodiments. When the coil spring 36a expands and contracts from the state of FIG. 7, the leaf spring 35
A frictional force is generated between an abutting portion C between the inner surface of the opening side end portion of the first sheet member 31 and an abutting portion D between the first sheet member 31 and the second sheet member 32 on the opposite side. As the compression of the elastic coupling assembly 36 progresses, the angled bend 35b
Enters between the first sheet member 31 and the second sheet member 32, and the biasing force on the first sheet member 31 and the second sheet member 32 gradually increases. As a result, the frictional force gradually increases. In this way, since the characteristic of the first stage is gently changed to the characteristic of the second stage, even if the torsional vibration in the range including this change point is transmitted, shock is unlikely to occur.

[0030]

According to the elastic coupling assembly of the present invention, the first
Since the seat member and the second seat member are engaged with each other, they can be easily mounted on other devices. When the first and second sheet members are detachable, it is easy to assemble and disassemble the spring member and the sheet member. When the first sheet member and the second sheet member respectively have the first and second sliding portions that slide with each other, a desired frictional force can be obtained when the spring member expands and contracts. When the urging member that urges the first sliding portion and the second sliding portion to each other is provided, the frictional force is stable.

In the damper device according to the present invention, the same effect as that of the elastic coupling assembly can be obtained. With the damper disk assembly according to the present invention, the same effects as those of the elastic coupling assembly and the damper device can be obtained. Moreover,
When the first sliding portion and the second sliding portion gradually increase the frictional force as the compression of the first spring member progresses, the characteristics of the separated hub type damper disk include the first step and the second step. The change in can be smoothed. This reduces the shock between the first stage and the second stage.

[Brief description of 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 schematic plan view of an engaging portion between a hub and a separation flange.

FIG. 3 is a cross-sectional view of an elastic connection assembly.

FIG. 4 is a diagram corresponding to FIG. 3 in the second embodiment.

FIG. 5 is a twist characteristic diagram of a damper disk assembly according to the present invention.

6 is an enlarged view of a circle A portion of FIG.

FIG. 7 is a diagram corresponding to FIG. 3 in the third embodiment.

FIG. 8 is a partial perspective view of an elastic connection assembly according to a third embodiment.

[Explanation of symbols]

 6 Elastic Connection Assembly 6a Coil Spring 11 First Seat Member 11a Tube Part 11b Constriction Part 12 Second Seat Member 12a Projection Part 12b Head Part

Claims (13)

[Claims] 1. A spring member, a first sheet member abutting on one end of the spring member, and a first sheet member abutting on the other end of the spring member so as to be relatively movable in the expansion / contraction direction of the spring member. An elastic coupling assembly comprising: a second sheet member that engages. 2. The elastic connection assembly according to claim 1, wherein the first and second sheet members are detachable. 3. The elastic coupling assembly according to claim 1, wherein the first sheet member and the second sheet member respectively have first and second sliding portions that slide with each other. 4. The elastic coupling assembly according to claim 3, further comprising a biasing member that biases the first sliding portion and the second sliding portion to each other. 5. An input-side rotating body, an output-side member, a spring member, a first sheet member which abuts on one end of the spring member, and an abutment on the other end of the spring member, and a direction in which the spring member extends and contracts. An elastic coupling assembly that elastically couples the input side rotating body and the output side member in the circumferential direction, including a second sheet member that is movably engaged with the first sheet member. The equipped damper device. 6. The damper device according to claim 5, wherein the first and second sheet members are detachable. 7. The damper device according to claim 5, wherein the first sheet member and the second sheet member respectively have first and second sliding portions that slide with each other. 8. The damper device according to claim 7, wherein the elastic coupling assembly includes a biasing member that biases the first sliding portion and the second sliding portion toward each other. 9. An input side rotating body, an output side hub, a disc plate arranged on the outer periphery of the hub, a first spring member, and a first sheet member abutting on one end of the first spring member. A second sheet member that abuts on the other end of the first spring member and engages with the first sheet member so as to be relatively movable in the expansion and contraction direction of the first spring member, the disc plate and the output. An elastic connection assembly that elastically connects the side hub in the circumferential direction, and an elastic connection assembly that elastically connects the input side rotating body and the disc plate in the circumferential direction, and has higher rigidity than the first spring member. A damper disk assembly including a second spring member. 10. The damper disk assembly according to claim 9, wherein the first and second sheet members are detachable. 11. The damper disk assembly according to claim 9, wherein the first sheet member and the second sheet member respectively have first and second sliding portions that slide with each other. 12. The damper device according to claim 11, wherein the elastic coupling assembly includes a biasing member that biases the first sliding portion and the second sliding portion toward each other. 13. The damper disk assembly according to claim 12, wherein the first sliding portion and the second sliding portion gradually increase the frictional force as the compression of the first spring member progresses.