JPH1030647A - Plate member and damper disc assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide desired characteristics by a method wherein bending of an elastic member radially externally of a disc during compression of the elastic member is suppressed. SOLUTION: A plate 5 is used for a clutch assembly to transmit torque through a torsion spring. The plate 5 is provided with a plate member body in which a punched window hole 5b to arrange the torsion spring 7 therein is formed, and the outer peripheral edge (b) of the window hole 5b and a movement limit member 30 made of resin protruded from the external peripheral edge radially internally. The movement limit member 30 limits bending in the radially external direction of the disc of the torsion spring 7 when the torsion spring 7 is peripherally compressed. As a result, desired torsion properties are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plate member for transmitting torque and a damper disk assembly using the plate member.

[0002]

2. Description of the Related Art For example, a clutch disk assembly used for a clutch device of a vehicle includes a disk-shaped input side plate,
An output-side hub having an integral flange on the outer periphery, and a coil spring disposed between the input-side plate and the flange to restrict relative rotation between the two. A punched window hole for accommodating the coil spring is formed in the flange. The outer peripheral edge of the window hole has an arc shape. Both ends in the circumferential direction of the coil spring are in contact with the edge of the window hole. Further, the input side plate is formed with support portions for supporting both ends in the circumferential direction of the coil spring. Thus, when the input side plate rotates, torque is transmitted to the hub via the coil spring.

If torsional vibration occurs during torque transmission,
The plate and the hub rotate relative to each other, and the coil spring is compressed between the two members.

[0004]

In the above-mentioned conventional clutch disk assembly, the set length of the coil spring is long in order to obtain a wide torsion angle. For this reason, the coil spring tends to bend radially outward when compressed. If the coil spring bends radially outward, desired torsional characteristics cannot be obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress the elastic member from bending outward in the radial direction when the elastic member is compressed, and to obtain desired characteristics.

[0006]

According to a first aspect of the present invention, there is provided a plate member used in a damper disk assembly for transmitting a torque through an elastic member, wherein the elastic member is disposed. A plate member body having a punched window hole formed therein, and a radially outward flexure of the elastic member when compressed, which is disposed at an outer peripheral edge of the window hole and projects radially inward from the outer peripheral edge. And a resin movement restricting portion for restricting the movement. In this plate member, when the elastic member is compressed in the circumferential direction in the window hole,
Radial outward deflection of the elastic member is limited by the limiting portion. As a result, desired torsional characteristics are obtained.

According to a second aspect of the present invention, in the plate member according to the first aspect, the movement restricting portion is disposed on the outer peripheral edge of the window so as to be slidable in the circumferential direction.
In this plate member, the movement restricting portion slidable in the circumferential direction restricts the elastic member from bending radially outward. As a result, desired torsional characteristics are obtained. A plate member according to a third aspect is the plate member according to the first or second aspect, wherein the movement restricting portion has a depression corresponding to an outer shape of the elastic member. In this plate member, the depression of the movement restricting portion restricts the elastic member from bending radially outward. As a result, desired torsional characteristics are obtained.

According to a fourth aspect of the present invention, in the plate member according to the first to third aspects, the movement restricting portion is detachably fitted to an outer peripheral edge of the window. In this plate member, the detachable movement restricting portion restricts the elastic member from bending outward in the radial direction. As a result, desired torsional characteristics are obtained. According to a fifth aspect of the present invention, there is provided a damper disk assembly comprising: the plate member according to any one of the first to fourth aspects; an elastic member disposed in a window of the plate member; A second plate member having a support portion for supporting both ends of the member. With this damper disk assembly, the same functions and effects as in claims 1 to 4 can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clutch disk assembly 1 according to an embodiment of the present invention shown in FIGS. 1 and 2 applies torque from an engine (not shown) arranged on the left side of FIG. Transmission located on the right (not shown)
It is a device for transmitting and shutting off to. OO in FIG. 1 is the rotation axis of the clutch disk assembly 1,
Arrow R2 in FIG. 2 is the direction of rotation.

The clutch disk assembly 1 mainly includes:
The hub 2 as an output-side member, the clutch plate 3 and the retaining plate 4 as an input-side member, the sub-plate 5 as an intermediate member, and the relative rotation between the sub-plate 5 and the hub 2 are limited. Of the small coil spring 6, the large coil spring 7 arranged between the plates 3, 4 and the sub-plate 5 so as to limit the relative rotation of the two, and the plates 3, 4 and the hub 2 And a frictional resistance generating mechanism 8 that generates a predetermined frictional force when relative rotation occurs between them.

The hub 2 is located at the center of the clutch disk assembly 1 and is connected to a transmission shaft (not shown). The hub 2 has a cylindrical boss 2 extending in the axial direction.
a and a flange 2b integrally formed on the outer periphery of the boss 2a
It is composed of A plurality of projections 2c are formed on the outer periphery of the flange 2b at equal intervals in the circumferential direction. Boss 2
The shaft of the transmission (not shown)
Is formed with a spline hole 2e for spline engagement.

A sub plate 5 is arranged on the outer periphery of the flange 2b of the hub 2. The sub-plate 5 is a disk-shaped plate. As is apparent from FIG. 2, the sub-plate 5 has four protrusions 5a extending radially outward. Each protruding portion 5a is formed with a window hole 5b extending in the circumferential direction. As shown in detail in FIG. 4, a movement restricting member 30 is provided on the outer peripheral edge of the window hole 5b in the circumferential direction (arrows R1 to R2).
Direction) slidably fitted. Movement restriction member 30
Is made of resin and has a C-shaped cross-section that opens outward in the radial direction.

The movement restricting member 30 has a straight surface 31 at a radially inner end when viewed from the front of the disk.
This surface 31 does not come into contact with the spring 7 as shown in FIG. 4 in the free state of the disk, and contacts the spring 7 to support the spring 7 in the torsion state of the disk as shown in FIG. The amount of protrusion from the outer peripheral edge of the window hole 5b in the inner peripheral direction is set so as to prevent outward bending.

As shown in FIG. 5, a hole 32 extending in the circumferential direction of the disk is formed in the center of the movement restricting member 30. The inner peripheral end surface 32a of the hole 32 is a curved surface along the curve of the outer peripheral edge of the window hole 5b. A pair of locking claws 33 are formed at the outer peripheral end of the movement restricting member 30. A gap whose distance is shorter than the thickness of the sub-plate 5 is formed between the locking claws 33. The surfaces of the both locking claws 33 facing each other are inclined surfaces 33a, and when the movement restricting member 30 is fitted to the outer peripheral edge of the window hole 5b from the inner peripheral side using elastic deformation, the fitting work is performed. It has become easier. Inner peripheral end surface 33b of claw 33
Is a curved surface along the curve of the outer peripheral edge of the sub-plate 5.

As shown in FIG. 2, an outer notch 5c is formed between each protrusion 5a. On the inner peripheral side of the sub-plate 5, an inner protrusion 5d is formed at a portion corresponding to the space between the protrusions 2c of the hub 2. A predetermined circumferential gap is provided between the protrusion 2c and the inner protrusion 5d, so that the hub 2 and the sub-plate 5 can rotate by a predetermined angle.

Notches 5e are formed at two locations corresponding to the inner peripheral side of the sub-rate 5 and the hub 2. Small coil springs 6 (FIG. 3) are arranged in these notches 5e. The clutch plate 3 and the retaining plate 4 are arranged on both sides of the sub plate 5.
The clutch plate 3 and the retaining plate 4
It is a pair of substantially disk-shaped members, and is rotatably arranged on the outer peripheral side of the boss 2a of the hub 2. Clutch plate 3
And the retaining plate 4 has a contact pin 11
Are fixed to each other. The contact pin 11 passes through an outer notch 5 c formed in the sub-plate 5. Since a predetermined gap is secured in the circumferential direction between the contact pin 11 and the outer notch 5c, the plates 3, 4 and the sub-plate 5 can be relatively rotated.

On the outer periphery of the clutch plate 3, a friction connecting portion 10 is arranged. The friction connecting portion 10 mainly includes an annular cushioning plate 12 and a friction facing 13. The cushioning plate 12 has an annular portion 12 a fixed to the clutch plate 3 by a contact pin 11. A plurality of cushioning portions 12b are formed on the outer periphery of the cushioning plate. Friction facings 13 are fixed to both surfaces of the cushioning portion 12b. An engine-side flywheel (not shown) is disposed on the left side of the friction facing 13 in FIG. 1. When the friction facing 13 is pressed against the flywheel by a pressure plate (not shown), the clutch disc assembly 1 is attached to the engine-side flywheel. Is input.

Window holes 3a and 4a are formed in the clutch plate 3 and the retaining plate 4 at positions corresponding to the window holes 5b of the sub-plate 5, respectively. The large coil spring 7 is disposed in the window holes 3a and 4a. On both radial sides of each of the window holes 3a and the window holes 4a, presser portions 3a cut and raised outward in the axial direction are provided.
4b is formed.

There are a total of four large coil springs 7, one in each window hole 5b. Inside the large coil spring 7, a small-diameter coil spring 7a is arranged. Both ends of the springs 7 and 7a in the disk circumferential direction are in contact with the circumferential ends of the window holes 5b, 3a and 4a. The large coil spring 7 includes the retaining plate 4
Pressing portion 4b and clutch plate 3 pressing portion 3
The movement in the radially outward and axial directions is restricted by b.

The frictional resistance generating mechanism 8 is formed of an annular member disposed on the outer peripheral side of the boss 2a between the inner peripheral portion of the clutch plate 3 and the inner peripheral portion of the retaining plate 4 in the axial direction. . As shown in FIG. 3, the members constituting the frictional resistance generating mechanism 8 are a first friction washer 14, a second friction washer 15, a first cone spring 16, a second cone spring 17, and a third friction washer 18.

Next, the operation of the clutch disk assembly 1 will be described. When the friction facing 13 is pressed against a flywheel (not shown) on the engine side, the torque of the flywheel on the engine side increases the clutch plate 3.
And input to the retaining plate 4. This torque is applied to the large coil spring 7, the coil spring 7a,
Hub 2 via sub-plate 5 and small coil spring 6
And transmitted to a transmission-side shaft (not shown).

Engine side flywheel (not shown)
When the torsional vibration is transmitted from the clutch disk assembly 1 to the clutch disk assembly 1, relative rotation occurs between the plates 3, 4 and the hub 2, each spring is compressed, and friction is generated by the frictional resistance generating mechanism 8. At this time, hysteresis occurs in the relationship between the torsion angle and the torsion torque. In a small range of the torsion angle, the small coil spring 6 is compressed in the circumferential direction, and the first friction washer 14 and the third friction washer 18 are connected to the flange 2 of the hub 2.
slides against b. Due to the characteristics of low rigidity and low hysteresis torque at this time, torsional vibration having a small displacement angle is effectively attenuated.

In a large range of the torsion angle, the small coil spring 6 is compressed and the sub-plate 5 and the hub 2 rotate integrally, and relative rotation occurs between these and the plates 3 and 4. At this time, the large coil spring 7 and the coil spring 7a are compressed, the first friction washer 14 slides on the flange 2b of the hub 2, and the second friction washer 15 slides on the inner peripheral side surface of the sub plate 5, Further, the third friction washer 18 is attached to the hub 2.
Of the flange 2b on the flywheel side and the inner peripheral side of the sub plate 5 on the flywheel side. Here, since the urging force of the second cone spring 17 is set to be larger than the urging force of the first cone spring 16, a large frictional force is generated. Due to the characteristics of high rigidity and high hysteresis torque at this time, torsional vibration having a large displacement angle is effectively attenuated.

Next, the compression operation of the large coil spring 7 will be described with reference to FIGS. In FIG. 6, the coil spring 7a is omitted for simplification. The example of the torsion operation here is an operation in which the sub-plate 5 is fixed and the plates 3 and 4 are twisted with respect thereto. When the plates 3 and 4 are twisted toward the arrow R2, the large coil springs 7 are formed by the edges of the window holes 3a and 4a on the arrow R1 side.
Are compressed. Further, the movement restricting member 30 is relatively moved in the R2 direction with respect to the sub-plate 5 by the edges of the window holes 3a and 4a on the arrow R1 side.

In the disk torsion state, the outer peripheral portion of the large coil spring 7 comes into contact with the surface 31 of the movement restricting member 30, as is apparent from FIG. Thereby, the large coil spring 7 is restricted from flexing outward in the radial direction. In addition, movement of the large coil spring 7 outward in the radial direction due to centrifugal force is restricted by the surface 31. As a result, desired torsional characteristics of the large coil spring 7 can be obtained.

The present invention is effective when the set length of the coil spring is long and the spring is easily bent and easily moved by centrifugal force. [Other Embodiments] (a) As shown in FIG. 7, the surface 31 of the movement restricting member 30 may be depressed so as to correspond to the outer shape of the large coil spring 7. (B) The movement restricting member 30 may be fixed to the sub plate 5 as shown in FIG. The fixing can be realized, for example, by molding a resin on the sub-plate 5 or using an adhesive. (C) The present invention can also be implemented by disposing the movement restricting member 30 in a window hole of a flange (an example of a plate member) integrated with the hub. (D) The present invention can be applied not only to the clutch disc but also to a damper mechanism such as a lock-up clutch of a flywheel assembly or a torque converter.

[0027]

According to the plate member of the first aspect, when the elastic member is compressed in the circumferential direction in the window, the outward bending of the elastic member in the radial direction is limited by the restricting portion. As a result, desired torsional characteristics are obtained. In the plate member according to claim 2, the movement restricting portion that is slidable in the circumferential direction includes:
Restricts the elastic member from flexing radially outward,
Desired torsional characteristics are obtained.

In the plate member according to the third aspect, the movement restricting portion has a depression corresponding to the outer shape of the elastic member. In this plate member, the movement restricting portion slidable in the circumferential direction restricts the elastic member from bending outward in the radial direction. As a result, desired torsional characteristics are obtained. Claim 4
In the plate member described in the above, the removable movement restricting portion,
Limiting the elastic member from flexing outward in the radial direction. As a result, desired torsional characteristics are obtained.

[0029] In the damper disk assembly according to the fifth aspect, the same effects as those of the first to fourth aspects can be obtained by the plate member.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a clutch disk assembly as one embodiment of the present invention.

FIG. 2 is a partially cut-away view taken along the arrow II in FIG.

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

FIG. 4 is a partially enlarged view of FIG. 2;

FIG. 5 is a perspective view of a movement restricting member.

FIG. 6 is a diagram illustrating a compression operation of a large coil spring.

FIG. 7 is a view corresponding to FIG. 5 in another embodiment.

FIG. 8 is a view corresponding to FIG. 6 in still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch disk assembly 5 Subplate 5b Window hole 7 Large coil spring 30 Movement restriction member 31

Claims (5)

[Claims] 1. A plate member for use in a damper disk assembly that transmits torque via an elastic member, the plate member body having a punched window hole for disposing the elastic member, A resin movement restricting portion disposed on an outer peripheral edge of the window hole and protruding radially inward from the outer peripheral edge, for restricting a radial outward deflection of the elastic member during compression. Plate member. 2. The plate member according to claim 1, wherein said movement restricting portion is disposed on an outer peripheral edge of said window hole so as to be slidable in a circumferential direction. 3. The plate member according to claim 1, wherein the movement restricting portion has a depression corresponding to an outer shape of the elastic member. 4. The plate member according to claim 1, wherein said movement restricting portion is detachably fitted into an outer peripheral edge of said window hole. 5. The plate member according to claim 1, wherein: an elastic member disposed in the window of the plate member; and an elastic member disposed on a side of the plate member. And a second plate member having a support portion for supporting both ends.