JP3534523B2 - Damper mechanism and flywheel assembly - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper mechanism and flywheel assembly.

[0002]

2. Description of the Related Art In a vehicle, for example, a damper mechanism for absorbing torque fluctuations of an engine is provided between a member on the engine side and a member on the transmission side. The damper mechanism is incorporated in the clutch disc assembly and the flywheel assembly. The damper mechanism includes an input-side member and an output-side member that are rotatable relative to each other, an elastic member such as a coil spring arranged to limit the rotation of the both members when they rotate relative to each other, and both members rotate relative to each other. Sometimes, a friction generating mechanism for generating friction to damp the vibration is included.

For example, in a damper mechanism arranged between a first flywheel and a second flywheel of a flywheel assembly, each member is arranged in a chamber filled with viscous fluid. Since it is lubricated by the viscous fluid, wear of sliding portions such as the elastic member, the supporting member, and the friction generating mechanism is reduced.

[0004]

In the conventional damper mechanism described above, the viscous fluid film may be broken at the sliding portion between the elastic member and the supporting member, and wear may occur at the sliding portion. Also,
If the viscous fluid leaks from the chamber, the lubricity is further reduced. An object of the present invention is to further improve lubricity in a damper mechanism.

[0005]

A damper mechanism according to a first aspect of the present invention comprises an input side member, an output side member, a housing chamber, a damper section, and a powdery solid lubricant. The output side member is
It is arranged to be rotatable relative to the input side member. The storage chamber is arranged between the input side member and the output side member. The damper portion is disposed in the accommodation chamber, elastically connects the input side member and the output side member in the rotational direction, and damps torsional vibration. The powdered solid lubricant is enclosed in the storage chamber.

The damper unit rotates the input side member and the output side member.
The elastic member includes an elastic member that elastically connects in the rolling direction.
It consists of a bent leaf spring with several spring elements arranged in series.
It In the damper part, the input side member and the output side member rotate relative to each other.
It includes a friction generation mechanism that generates friction when
In the rubbing mechanism, the outer circumference of the bent leaf spring is the outer circumference of the storage chamber.
It is configured to abut against a wall. With this damper mechanism,
When the torsional vibration is input, the input side member and the output side member
Causes periodic relative rotation, and the bent leaf spring
When compressed, the outer peripheral part slides on the outer peripheral wall of the storage chamber to reduce friction.
Occur. This friction generation part is made by powdered solid lubricant
Since they are lubricated, both members are less likely to wear. Especially powder
Powdered solid lubricant is adsorbable to each member and adherence after adsorption
Has good lubricity.

[0007]

[0008]

In the damper mechanism according to the second aspect , the powdery solid lubricant is molybdenum disulfide. for that reason,
In particular, the adhesive force after adsorption is the highest. In the damper mechanism according to the third aspect , the powdery solid lubricant is made of tungsten disulfide. Therefore, the adhesive force is particularly high after adsorption. A damper mechanism according to a fourth aspect is the damper mechanism according to any one of the first to third aspects, and a first member fixed to an input side member.
A flywheel and a second flywheel fixed to the output side member are provided.

[0010]

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A clutch device 1 according to an embodiment of the present invention shown in FIGS. 1 and 2 mainly includes a flexible plate 3, a first flywheel 4 , a damper mechanism 5 and a second flywheel 7. It is composed of a high wheel assembly 6, a clutch cover assembly 8 and a clutch disc assembly 10. An engine (not shown) is arranged on the left side of FIG. 1, and a transmission (not shown) is arranged on the right side.

The flexible plate 3 is a disk-shaped plate member, which has high rigidity in the circumferential direction but is bendable in the bending direction. The flexible plate 3 has a disk-shaped plate member 26 fixed to the engine side on the inner peripheral portion by rivets 12. The plate member 26 has an annular throttle portion 26a that comes into contact with the outer circumference of the front end of the crankshaft 52. This improves the centering accuracy of the flexible plate 3 and the crankshaft 52. The inner peripheral portion of the flexible plate 3 is fixed to the crankshaft 52 on the engine side together with the plate member 26 and the washer 27 by a bolt (not shown).

An annular first flywheel 4 is fixed to the outer peripheral edge of the flexible plate 3 by rivets (not shown). A ring gear 16 is fixed to the outer peripheral side of the first flywheel 4. The damper mechanism 5 mainly includes a first input plate 18, a second input plate 19, and 1.
It is composed of a pair of bent leaf springs 23 and a driven member 30.

The first input plate 18 is a disk-shaped plate member arranged on the side of the flexible plate 3. The inner peripheral portion of the first input plate 18 has a inner peripheral protruding portions 18 c extending toward the transmission. The radial intermediate portion of the first input plate 18 is an annular convex portion that projects toward the engine, as is apparent from FIG. Second
The input plate 19 is a disc-shaped plate member arranged laterally of the first input plate 18. The outer peripheral portion of the second input plate 19 and the outer peripheral portion of the first input plate 18 are in contact with each other and are fixed to the first flywheel 4 by the rivets 31. A seal ring 32 is arranged between the outer peripheral portions of the first input plate 18 and the second input plate 19. The inner diameter of the second input plate 19 is larger than the inner diameter of the first input plate 18.

An annular space formed by the annular convex portion of the first input plate 18 and the second input plate 19 is a spring accommodating chamber 17. The driven member 30 is the disk portion 3
0a and the disk portion 30a integrally extending radially outward 1
It has a pair of engaging portions 30b. The engaging portions 30b are provided at positions facing each other in the radial direction, and extend into the spring accommodating chamber 17. In addition, the first and second input plates 18,
The reference numeral 19 has supporting portions 18a, 19a protruding in the axial direction. The support portions 18a and 19a are formed so as to extend in the circumferential direction at three locations in the radial direction.

In this way, the engaging portion 24b and the supporting portion 1
The ring-shaped spring accommodating chamber 17 is divided into two arc-shaped chambers by 8a and 19a. The bent leaf spring 23 arranged in each arc chamber will be described. As shown in the figure, the bent leaf spring 23 extends in a state in which a plate member having a predetermined width is bent in a wave shape, and a plurality of spring elements including ring portions 24 and 25 and a lever portion 26 are connected in series. Become. The outer peripheral side ring portion 24 and the inner peripheral side ring portion 25 are alternately arranged and have end portions having a small gap in the circumferential direction on the opposite sides. Each end is connected to the end of the opposing ring by a lever 26. Lever part 26
Extend so as to open to both sides when viewed from the ring portions 24, 25 side. Both ring portions 24 and 25 have a variable cross section in which the thickness gradually decreases from the end to the center,
The rigidity is lower than that of the lever portion 26. The outer peripheral side ring portion 24 has a larger diameter than the inner peripheral side ring portion 25. The outer peripheral side ring portion 24 is slidable on the outer peripheral wall 18b.

Both ends in the circumferential direction of the bent leaf spring 23 are in contact with the engaging portion 30b and the supporting portions 18a, 19a. A solid powder lubricant made of molybdenum disulfide, for example, is enclosed in the spring chamber 17. The powdered solid lubricant is mixed with air and floats in the spring accommodating chamber 17,
Further, the first input plate 1 which constitutes the wall of the spring accommodating chamber 17
8 and the second input plate 19, the driven member 30, and the curved leaf spring 23 are attached to the surfaces thereof. Each sliding part is lubricated by this powdery solid lubricant.

The characteristics required as a powdery solid lubricant enclosed in the damper mechanism are as follows. (1) Low friction coefficient and good lubricity. (2) Good adsorption to each member (metal). (3) The adhesive force after adsorbing to each member is strong. Since the powdered solid lubricant does not disappear from the sliding portion, the lubricity can be maintained for a long time.

(4) Light weight and easy to scatter. (5) There is no self-condensing property. (6) Good heat resistance. (7) Not a harmful substance. Considering the properties of each solid lubricant shown in FIG. 3 from the above points, it is found that molybdenum disulfide is the most preferable from the viewpoint of adsorption and adhesive force. Further, molybdenum disulfide can be used under high load and is inexpensive. Tungsten disulfide is the second preferred.

The second flywheel 7 has an annular friction surface 7a on the transmission side. The second flywheel 7 is formed with a communication hole 7b that communicates both surfaces. The disk portion 30 a of the driven member 30 is fixed to the inner peripheral end of the second flywheel 7 by the rivet 29. The inner peripheral portions of the second flywheel 7 and the driven member 30 are supported by the inner peripheral protruding portion 18 c of the first input plate 18 via bearings 28. The bearing 28 is a lubricant-sealed type, and seals between the inner peripheral portion of the first input plate 18 and the inner peripheral portions of the driven member 30 and the second flywheel 7.

The clutch cover assembly 8 is provided on the friction surface 7a side of the second flywheel 7. The clutch disc assembly 10 is arranged between the second flywheel 7 and the clutch cover 8. The clutch disc assembly 10 is connected to a transmission input shaft (not shown). Next, the operation will be described.

The torque is transmitted to the first flywheel 4 through the crankshaft 52 Carrara flexible plate 3 of the engine side is transmitted through the damper mechanism 5 to the further output plate and the second second flywheel 7 It When the torsional vibration is input to the damper mechanism 5, the first
The second input plates 18 and 19 and the driven member 30 cyclically rotate relative to each other, and the bending leaf spring 23 is compressed in the circumferential direction. Then, the opening angle of each lever portion 26 becomes smaller, and the ring portions 21, 25 and the lever portion 26 are set with the outer peripheral portions of the ring portions 24, 25 of the bent leaf spring 23 as fulcrums.
Bend in the same direction. At this time, the torsional rigidity is low.

As the relative angle increases, the ring portion 24,
The end portions of 25 contact each other, and thereafter, the ring portions 24 and 25 are flexibly deformed with the end portions as fulcrums. At this time, the torsional rigidity is high. At the time of relative rotation between the first and second input plates 18 and 19 and the driven member 30 described above, the bending leaf spring 23 moves to the outer peripheral side by the centrifugal force, and the outer peripheral ring portion 24 slides on the outer peripheral wall 18b. Generates friction.
However, since the solid lubricant is attached, the outer peripheral side ring portion 24 and the outer peripheral wall 18b are not easily worn. Further, it is difficult for excessively large friction to occur at this friction generation portion. Both ends of the bent leaf spring 23, the engaging portion 30b, and the supporting portions 18a, 1
The sliding portion of 9a is also lubricated by the powdered solid lubricant and is less likely to wear.

Further, since the powdery solid lubricant has a strong adhesive force, it has a sealing property when it adheres to the gap. Therefore, the powdered solid lubricant does not leak from the spring accommodating chamber 17 to the outside, and maintenance such as supplying work is unnecessary. The damper mechanism may be used in devices other than the flywheel assembly. For example, it can be applied to a lockup device for a clutch disc assembly or a torque converter.

The type of solid lubricant is not limited to the above embodiment. Also, a plurality of types of solid lubricants may be mixed and used.

[0026]

In the damper mechanism and the flywheel assembly according to the present invention, since the powdered solid lubricant is enclosed in the accommodating chamber in which the damper part is accommodated, the lubricity of the sliding portion is improved and the wear is reduced. Unlikely to occur. In particular, powdered solid lubricants have good adsorbability to each member and adhesion after adsorption,
High lubrication effect.

As the powdery solid lubricant, those having a high adhesive force after adsorption such as molybdenum disulfide and tungsten disulfide are preferable.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a clutch device in which an embodiment of the present invention is adopted.

FIG. 2 is a partial plan view of a flywheel assembly.

FIG. 3 is a table showing properties of solid lubricants.

[Explanation of symbols]

4 first flywheel 5 Viscous damper mechanism 6 Flywheel assembly 7 Second flywheel 17 Spring chamber 23 Bent leaf spring

Claims (4)

(57) [Claims] 1. An input side member, an output side member rotatably arranged with respect to the input side member, a storage chamber disposed between the input side member and the output side member, and the storage chamber. disposed includes a damper portion for torsional damping vibrations while elastically connecting in the rotational direction of said output member and the input-side member, and a powdery solid lubricant which is filled in the holding chamber , The damper portion connects the input side member and the output side member.
The elastic member includes an elastic member that elastically connects in the rotational direction, and the elastic member is formed by bending a plurality of spring elements arranged in series.
The damper portion includes an input side member and an output side member.
Includes a friction generation mechanism that generates friction when rotating relative to each other
Therefore, in the friction generating mechanism, the outer peripheral side portion of the bent leaf spring is
A damper mechanism configured to abut the outer peripheral wall of the accommodation chamber . 2. The damper mechanism according to claim 1 , wherein the powdered solid lubricant comprises molybdenum disulfide. 3. The damper mechanism according to claim 1 , wherein the powdered solid lubricant comprises tungsten disulfide. With said damper mechanism according to any one of 4. The method of claim 1-3, a first flywheel which is fixed to the input side member and a second flywheel which is fixed to the output-side member Flywheel assembly.