JPH0213774Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a damper disk suitable for a clutch disk for an automobile.

Conventionally, this type of damper disk consists of an input section consisting of a pair of side plates (a clutch plate and a retaining plate) connected to a friction facing, and both side plates arranged on both sides of a hub flange, which is an output section. A structure in which they are connected in the circumferential direction by lever springs is adopted. Also, in such a disk, a stop pin is fixed to the side plate. The stop pin is located in a circumferentially long notch provided on the outer periphery of the flange, and when the relative torsion angle between the input part and the output part reaches a predetermined maximum value, the stop pin moves to the edge of the notch. It is designed to engage with and prevent further twisting.

Further, in some damper disks, the flange portion of the hub is divided into an outer flange (a flange independent of the hub) and an inner flange (a flange integrated with the hub). In such a structure, the outer periphery flange is connected to the side plate in the same way as the flange of the conventional structure, and the inner periphery and outer periphery flanges are connected in the circumferential direction by a spring. The flange on the side and the flange on the inner circumferential side are in a relationship of an input part and an output part with each other. In this structure, the inner and outer flanges are provided with external teeth and internal teeth that oppose each other in the circumferential direction as stoppers, and when the relative torsion angle of both flanges reaches a predetermined maximum value, , the external teeth and internal teeth engage to prevent further twisting.

As mentioned above, damper discs generally include:
A stopper is provided, which is composed of a stop pin and a notch edge, or external teeth and internal teeth.
In the conventional structure, all of these stoppers are made of the same or similar metal as the side plate and flange, which causes large metal noises (collision sounds) and vibrations when the stoppers engage. There is a problem.

In order to solve the above-mentioned problems, the present invention provides a disk with a divided flange portion as described above, in which a rubber-like elastic body is attached to one of the circumferentially opposing edges of the external teeth and internal teeth of both flanges. However, it is characterized in that a rubber-like elastic body is attached to the edge of the notch facing the stop pin of the side plate.

Next, the present invention will be explained based on the drawings. FIG. 1 is a partial longitudinal sectional view showing a case where the damper disk according to the present invention is adopted in an automobile clutch disk having the latter structure of the conventional examples. It corresponds to the cross section along the line. In FIG. 1, a spline hub 1 is spline-fitted to a horizontal output clutch shaft (not shown) at an internal spline 2 on the inner periphery, and integrally has an inner flange body 3. . An outer flange body 4 that surrounds the inner flange body 3 and has approximately the same thickness as the inner flange body 3 is located on the same vertical plane, and as shown in FIG. It is slidably engaged with the internal teeth 6 of the side flange main body 4 with circumferential gaps 7 and 7' being provided therebetween. The outer flange main body 4 is provided with one on both front and rear sides (left and right in Fig. 1) by sub-pins 8.
A pair of sub-plates 9, 9 are fixed. The sub-plates 9, 9 have fan-shaped projections 9a (second
), the inner peripheral surface 9b of which is slidably fitted to the outer peripheral surface of the hub 1, and supports the outer peripheral flange main body 4 concentrically with respect to the hub 1. The inner peripheral portions of the sub-plates 9, 9 are in pressure contact with both side surfaces of the inner flange body 3 through wave springs 10 fitted into recesses provided on both sides of the inner flange body 3, respectively.

The first stage spring 12 is inserted into two notches 11 (Fig. 2) provided on the outer periphery of the inner flange body 3.
The spring 12 is contracted so that its center line is along the circumferential direction of the disk, and the spring 12 extends from both sides.
The portion (FIG. 1) fits into a notch 13 provided in the sub-plate 9. Opposing protrusions 14 provided on both sides of the notch 11 in the circumferential direction fit into both ends of the spring 12 to prevent the spring 12 from falling off. A rubber-like elastic body 15 is fixed to each end face by pasting, baking, molding, or the like.

As shown in FIG. 1, a retaining plate 17 and a clutch plate 18 are attached to the outer surfaces of the sub-plates 9, 9 opposite to the inner flange body 3 via friction washers 16.
The outer peripheries of 7 and 18 are brought into pressure contact by being connected and integrated by a stop pin 19 so as to approach each other. On the same circumference 2 of the outer flange body 4
A second stage spring 21 is contracted in the window hole 20 formed at the location (only one spring 21 is shown in FIG. 1) with its center line extending in the circumferential direction, and the spring 21 protruding from the window hole 20 is compressed. The parts are both plates 17,1
It fits into window holes 22 and 23 provided in 8. The end faces of each of the window holes 20, 22, and 23 at both ends in the disk circumferential direction are aligned on the circumference when the clutch disk is in neutral as shown in FIG. Those window holes 20,2
2 and 23 in pressure contact with both end surfaces in the circumferential direction.

The outer flange main body 4 is provided with further window holes 24 (FIG. 2) at two locations on the same circumference, and the third stage spring 25 is inserted into the window holes 24 through gaps 26, 26 in the circumferential direction. They are housed separated by . The part of the spring 25 that protrudes from the window hole 24 is connected to the window hole 22 provided in both plates 17, 18 (FIG. 1).
It is pressed against the end face of a window hole (not shown) similar to 23.

The stop pin 19 is disposed in a notch 29 provided on the outer periphery of the outer flange body 4 with a gap in the circumferential direction, and on both end faces in the circumferential direction of the notch 29 where the stop pin 19 abuts, A rubber-like elastic body 30 is fixed by pasting, baking, molding, or the like. Furthermore, clutch plate 18
A facing 32 is attached to the outer periphery of the engine (FIG. 1) via a cushioning plate 31, and the facing 32 faces an engine side flywheel and a clutch case side pressure plate (not shown).

Next, the operation will be explained. When transmitting the rotational force from the engine to the axle, the facing 32 on the outer periphery of the disk is pressed against the flywheel, and the power is extracted from the clutch shaft at the center of the spline hub 1.
Consider the case where the spline hub 1 is fixed and the spline hub 1 is rotated. Since the sub-plate 9 is fixed by the strong second-stage spring 21, the first-stage spring 12 is compressed first. The torque applied to the spline hub 1 in the direction of arrow A (Fig. 2) is applied to the inner flange 3, the first stage spring 12, the sub-plate 9, the second stage spring 21, and the clutch plate 1.
8 (FIG. 1), and is transmitted to the facing 32 via the cushioning plate 31. Since a sufficiently soft spring 12 is used as the first stage spring 12, the increase in torsion torque with respect to the increase in torsion angle is small as shown by T ₁ in FIG. 3. When the torsion angle becomes θ ₁ , the gap 7 between the external teeth 5 and internal teeth 6 becomes 0.
As a result, the outer teeth 5 collide with the inner teeth 6, and the inner flange main body 3, outer flange main body 4, and sub-plate 9 become integrated and move in the same manner. At this time, the outer teeth 5 and the inner teeth 6 do not collide directly with each other, but instead collide through the rubber-like elastic body 15 fixed to the inner teeth 5, so that metal noise and abnormal vibrations are prevented from occurring. . Next, the second stage spring 21 starts to be compressed (T ₂ in FIG. 3), and when the outer flange body 4 rotates by θ ₂ , the gap 26 becomes 0 and the window hole 2
4 collides with the end surface of the third stage spring 25, compression of the third stage spring 25 begins, and the outer flange main body 4 begins to rotate when the torsion angle reaches θ ₃ , The stop pin 19 collides with the end face of the notch 29 in the circumferential direction, and the entire disk is integrated, and the disk is twisted to the maximum. At this time, the flange body 4 and the stop pin 19 do not cause direct metal collision, and the notch 29
Since the collision occurs via the rubber-like elastic body 30 fixed to the end face of the metal, metallic noise and abnormal vibrations are prevented from being generated. Here, the hysteresis torque of the first stage is generated by friction between the sub-plate 9 and the inner flange body 3, and the hysteresis torque of the second and third stages is generated between the sub-plate 9 and the clutch plate 1.
8. It is caused by friction between the retaining plates 17. The torsion torque when the torsion angle decreases after twisting to the maximum torsion angle is T ₃ ′, T ₂ ′,
It changes along the line T ₁ ′. The hysteresis torque of the first stage is sufficiently small, so in Fig. 3, the torque T ₁ ,
T ₁ ′ is shown as the same straight line. Note that the operation is similar when torque is applied to the spline hub 1 in the reverse A direction (FIG. 2) (however, the characteristics are not shown in FIG. 3).

As explained above, according to the present invention, in a disk having a divided flange portion, a rubber-like elastic body 15 is attached to one of the circumferentially opposing edges of the external teeth 5 and internal teeth 6 of both flanges, Since the rubber-like elastic body 15 is attached to the edge of the notch 29 of the side plates 17 and 18 that faces the stop pin 19, there is no direct collision between metals at the stopper part, and the collision occurs via the rubber-like elastic bodies 15 and 30. This has the advantage of preventing metallic sounds and abnormal vibrations.

Note that the rubber-like elastic body 15 may be attached to the inner tooth 6 side, and for example, by fixing the rubber-like elastic body 15 over the entire circumference of the inner tooth 5, the friction material between the flange main body 3 and the sub-plate 9 can be reduced. It may also be used. If a cap-shaped or band-shaped rubber-like elastic body is fitted and fixed to the internal teeth 5 and external teeth 6, the same effect can be obtained, and there is an advantage that mounting is easy. On the other hand, a tube-shaped rubber-like elastic body may be fitted to the stop pin 19, and in this case, attachment becomes extremely easy. In addition, if a rubber-like elastic body is attached in a band shape over the entire circumference of the outer flange body 4 on the same radius as the notch 29 and configured to contact and rub against the plates 17 and 18, the flange body 4 and the plate 1
It can also serve as a friction material between 7 and 18. A similar effect can be obtained by fitting and fixing a cap-shaped or band-shaped rubber-like elastic body to the outer circumference of the flange main body 4.

It goes without saying that the present invention can be similarly applied to a type of damper disk in which the flange bodies 3 and 4 are not divided, and the stopper portion only has a notch 29 (or window hole) and a stop pin 19. .

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal sectional view showing a case where the damper disk according to the present invention is adopted as a clutch disk for an automobile, FIG. 2 is a partial cross-sectional view at - 1 of FIG. 1, and FIG. 3 is a graph showing torsional characteristics. 1...Hub, 3, 4...Flange body, 5, 6
... External teeth and internal teeth (stopper part), 12, 21,
25... Spring, 15, 30... Rubber-like elastic body, 17, 18... Retaining plate and clutch plate (input part), 19... Stop pin (stopper part), 29... Notch (stopper part) .

Claims (1)

[Scope of utility model registration request] An annular metal inner flange body is provided on the outer periphery of the output hub connected to the output shaft, an annular metal outer flange body is arranged around the inner flange body, and a pair of annular metal outer flange bodies are arranged on both sides of the flange bodies in the axial direction. A torque input member is connected to one side plate, the inner flange body and the outer flange body are connected in the circumferential direction by a damper spring, and the outer flange body and the side plate are connected to another side plate. They are connected in the circumferential direction by a damper spring, and both side plates are fixed to each other by a metal stop pin extending in the axial direction.A notch is provided on the outer periphery of the outer flange body through which the stop pin passes, and the inner periphery of the outer flange body and Internal teeth and external teeth facing each other in the circumferential direction are integrally formed on the outer periphery of the inner flange body, and when both the flange bodies and the side plate are relatively untwisted, the external teeth and internal teeth are In the damper disk having a gap in the circumferential direction between the stop pin and the edge of the notch, a rubber-like elastic body is attached to one of the edges of the external teeth and the internal teeth that face each other in the circumferential direction. , a damper disk characterized in that a rubber-like elastic body is attached to the edge of the notch facing the stop pin.