JPH04277323A - Damper disk - Google Patents

Abstract

PURPOSE:To provide a damper disk whose radial dimension can be reduced while keeping its performance as it is. CONSTITUTION:This damper disk includes a hub 1, a flange portion 4, input-side plate members 6,7, a main damper unit 2 and an auxiliary damper unit 3. The hub 1 and the flange portion 4 are connectable to an output side shaft, and the input side plate members 6,7 are a pair of members disposed rotatably around the periphery of the hub 1 and flange portion 4, opposite to each other in the axial direction. The main damper unit 2 is disposed between the pair of input side plate members 6,7, and is a member for transmitting elastically rotative force inputted from the pair of input side plate members 6,7 to the hub l and flange portion 4 side. The auxiliary damper unit 3 is disposed between the main damper unit 2 and either one of the pair of input side plate members 6,7, and is a member for connecting together elastically the main damper unit 2, the hub 1 and flange portion 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper disk used in automobile clutch disks and the like.

0002

2. Description of the Related Art As a conventional damper disk, a separate hub type has already been provided for the purpose of increasing its torsional angle. In a conventional separate hub type damper disk, the flange portion of the spline hub is divided into an inner flange and an outer flange. In order to elastically connect the input-side plate member and the hub, which is the output-side member, elastic members having different rigidities are successively arranged in the radial direction on each flange. Then, when the transmitted torque is small, an elastic member with low rigidity acts, and torsion angle and torsion torque characteristics corresponding to the elastic characteristics are obtained. Furthermore, when the transmitted torque increases, this elastic member becomes a rigid body, and then a highly rigid elastic member acts, and torsional angle and torsional torque characteristics corresponding to this highly rigid elastic member are obtained.

0003

[Problems to be Solved by the Invention] In the above-mentioned separate hub type damper disk, two types of elastic members are arranged consecutively on a straight line in the radial direction. Therefore, the radial dimension of the entire damper disk becomes too large. Additionally, since a space is required between the inner flange and the outer flange to connect them, it is not possible to secure enough space for arranging the elastic member without reducing the strength. The degree of freedom is low.

An object of the present invention is to provide a damper disk whose radial dimension can be reduced and which can increase the degree of freedom in design without reducing strength.

[0005]

[Means for Solving the Problems] A damper disk according to the present invention includes a hub, an input side plate member, a main damper unit, and a sub-damper unit. The hub is connectable to an output shaft. The input side plate members are a pair of members rotatably arranged on the outer peripheral side of the hub so as to face each other in the axial direction. The main damper unit is arranged between a pair of input side plate members,
This is a member that elastically transmits the rotational force input from the pair of input side plate members to the hub side. The sub-damper unit is a member that is disposed between the main damper unit and one of the pair of input-side plate members, and elastically connects the main damper unit and the hub.

[0006]

In the damper disk according to the present invention, the sub-damper unit is disposed between the main damper unit and one of the pair of input-side plate members. That is, both are disposed offset in the axial direction. Therefore, the radial dimension of the entire damper disk can be reduced, and both can be made into subunits, making it easy to adjust the characteristics of the main damper unit, for example. In addition, since the main damper unit and the sub-damper unit do not interfere in the radial direction, sufficient space can be secured especially in the sub-damper unit, and a large number of elastic members can be placed without reducing the strength of the sub-damper unit. The degree of freedom increases.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a damper disk according to an embodiment of the invention. In the figure, this damper disk mainly includes a hub 1 that can be connected to an output shaft (not shown), a main damper unit 2 arranged on the outer peripheral side of the hub 1, and an axially forward part of the main damper unit 2. and a sub-damper unit 3.

The hub 1 has a spline hole 1a in its center that engages with an outer peripheral spline portion of an output shaft (not shown). Further, the hub 1 has a plurality of outer circumferential teeth 1b formed along the axial direction on the outer circumferential side. The main damper unit 2 mainly includes a disc-shaped flange portion 4, a plurality of pairs of outer peripheral side torsion springs 5a and 5b, and a pair of input side plate members 6 and 7 arranged on both sides of the flange portion 4.
It is composed of.

The flange portion 4 has inner teeth 4a on the inner circumferential side, and the inner teeth 4a fit into the outer teeth 1b of the hub 1 with a predetermined gap in the circumferential direction. ing. In the flange portion 4, stopper notches 4d are formed at predetermined intervals on the outer periphery, and five window holes 4c are formed in the circumferential direction on the inner periphery thereof. A pair of outer circumference side torsion springs 5a and 5b are accommodated in each of the five window holes 4c.

The input side plate members 6 and 7 are generally disc-shaped members, and are each rotatably disposed on the outer peripheral side of the external teeth 1b of the hub 1. The input side plate members 6 and 7 are connected by a stopper pin 9 at their outer peripheries. The stopper pin 9 is inserted through the stopper notch 4d of the flange portion 4. In addition, the inner diameters of both input-side plate members 6 and 7 are smaller than the outer diameter of the outer teeth 1b of the hub 1, and the hub 1 is sandwiched between the two plate members 6 and 7 to prevent the hub 1 from falling off. It is prevented. A facing member 10 is fixed to the outer peripheral portion of the input side plate member 6. In addition, the input side plate member 6 has a window hole 8 corresponding to the window hole 4c of the flange portion 4.
is formed in the input side plate member 7, and a recess 7a is formed in the input side plate member 7.
is formed. Outer circumferential torsion springs 5a and 5b are housed in the window hole 4c and the recess 7a, respectively.

As shown in FIG. 3, an annular cone spring 11, a friction plate 12, and a friction material 13 are arranged between the flange portion 4 and the inner peripheral portion of the input side plate member 6 from the rear side in the axial direction. has been done. The friction material 13 is
The cone spring 11 is brought into pressure contact with the inner circumferential portion of the flange portion 4 at a predetermined pressure, thereby generating a second stage hysteresis torque.

The sub-damper unit 3 is disposed between the inner circumferential portion of the flange portion 4 and the inner circumferential portion of the input side plate member 7. As shown in detail in FIGS. 3 and 4, the sub damper unit 3 includes a center plate 21, an inner circumference side torsion spring 22, and a pair of side plates 23, 24.
It is mainly composed of. Center plate 21
is a generally disc-shaped member, and has internal teeth 21a on the inner peripheral side. The inner teeth 21a engage with the outer teeth 1b of the hub 1. Six window holes 21b are formed in the center plate 21 on the circumference. Inner circumferential torsion springs 22 are accommodated in the six window holes 21b. Side plates 2 are provided on both sides of the center plate 21.
3 and 24 are arranged. Side plates 23, 24
are generally disc-shaped members, and are rotatably engaged with the outer circumferential side of the hub 1, respectively. Each side plate 23, 2
4, window holes 23a and 24a are formed corresponding to the window hole 21b of the center plate 21, respectively. Inner circumferential torsion springs 22 are housed in the window holes 23a and 24a, respectively.

Each of the sub-plates 23 and 24,
An annular friction material 2 is provided between the center plate 21 and the inside of the center plate 21.
5 and 26 are arranged. Further, a wave spring 27 is arranged between the side plate 24 on the axially front side and the inner peripheral portion of the input side plate member 7. The wave spring 27 and the friction materials 25 and 26 generate a first stage hysteresis torque. In addition, the center plate 21 has six elongated holes 2.
1c are formed at equal intervals in the circumferential direction. This long hole 2
A sub-pin 28 is inserted into 1c with a gap in the circumferential direction. Both ends of the sub-pin 28 have a small diameter, and one end thereof passes through a hole in the side plate 23 and is inserted into the through-hole 4d of the flange portion 4. The other end is inserted into and engaged with the hole 27a of the side plate 24 and wave spring 27.

Next, the operation will be explained. Torque is transmitted to the input side plate members 6 and 7 via the facing member 10. The torque transmitted to the input side plate members 6, 7 is transmitted to the outer peripheral side torsion springs 5a, 5.
It is transmitted to the flange portion 4 via b. Since the flange portion 4 and the sub-plates 23 and 24 of the sub-damper unit 3 are connected by the sub-pin 27, torque is transmitted from the flange portion 4 via the side plates 23 and 24 and the inner circumference side torsion spring 22. center plate 2
1 to the hub 1.

At this time, the part with the lowest rigidity, that is, the inner circumference side torsion spring 22, compresses and absorbs the vibration.
The torsion angle and torsion torque characteristics can be obtained in accordance with the spring characteristics. Moreover, when the inner peripheral side torsion spring 22 is compressed, the center plate 21 and the side plates 23, 2
Relative rotation occurs between the friction members 25, 26 and the center plate 21 or the side plates 23, 24. In this way, in the region where the transmitted torque is small, the first stage hysteresis torque corresponding to the pressure contact force of the wave spring 27 is obtained.

When the transmitted torque increases, the inner circumferential torsion spring 22 is further compressed, and the sub-pin 28 rotates and comes into contact with the end of the hole 21c of the center plate 21. At this time, the inner teeth 4a of the flange portion 4 are also in contact with the outer teeth 1b of the hub 1. That is, after this, the flange portion 4 is integrated with the hub 1 via the sub-damper unit 3 and the internal teeth 4a.

Thereafter, the outer circumference side torsion spring 17 is compressed to absorb vibration, and the stopper pin 9 is moved to the flange portion 4.
The torsion angle increases until the input side plate members 6, 7 and the flange portion 4 come into contact with the notch and are integrated with the flange portion 4. In the torsional motion until the input side plate members 6, 7 and the flange portion 4 rotate together, relative rotation occurs between the input side plate members 6, 7 and the flange portion 4, and the friction material 13 and the flange portion 4, slipping occurs between the two. In this manner, in a region where the transmitted torque is large, a second stage hysteresis torque corresponding to the friction material 13 and the cone spring 11 is obtained.

In the embodiment described above, the sub-damper unit 3 is arranged independently from the main damper unit 2 and offset in the axial direction. Therefore, the two do not interfere with each other, and for example, the center plate 21
There is no need to cut out a part of the window hole 21c or the window hole 4c of the flange portion 4. Therefore, without reducing the strength of each part, it is possible to increase the number of inner circumferential torsion springs 22 that can be housed in the sub-damper unit 3, increase the torsion angle, and increase the variety of types. becomes. Therefore, the degree of freedom when setting the characteristics is increased, and the optimum spring characteristics can be set especially when the hysteresis is low. The same applies to the main damper unit 2 side.

Furthermore, the main damper unit 2 and the sub-damper unit 3 are made into subunits, each having an independent hysteresis mechanism (spring and friction material). Therefore, the characteristics of both can be easily adjusted.

Furthermore, the radial dimension of the damper disk body can be reduced. Therefore, facing member 1
The inner diameter of the facing member 10 can be reduced to increase the area, and as a result, the life of the facing member 10 can be extended. Furthermore, by reducing the diameter of the damper disk body, the inertial force of the damper disk becomes smaller. Therefore, it is possible to improve the shift feeling and the life of the synchromesh mechanism.

[Other Examples] In the above examples,
Although the sub-damper unit 3 is arranged axially forward of the main damper unit 2, it may be arranged axially rearward.

[0022]

In the damper disk according to the present invention, the sub-damper unit is disposed between the main damper unit and one of the pair of input-side plate members. Therefore, the diameter of the damper mechanism can be reduced, and the degree of freedom in design can be increased without reducing the strength.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a damper disk according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of FIG. 1;

FIG. 3 is an enlarged partial view of FIG. 1.

FIG. 4 is a partially cutaway plan view of the sub-damper unit.

[Explanation of symbols]

1 Hub 2 Main damper unit 3 Sub-damper unit 4 Flange part 6, 7 Input side plate member

Claims (1)

[Claims] Claims: 1. A hub connectable to an output shaft; a pair of input plate members rotatably disposed on the outer circumferential side of the hub so as to face each other in the axial direction; a main damper unit disposed between the side plate members and elastically transmitting the rotational force input from the pair of input side members to the hub side; and a main damper unit and the pair of input side plate members. a sub-damper unit disposed between the main damper unit and the hub, the sub-damper unit elastically connecting the main damper unit and the hub.