JPH0349304Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field In recent years, devices have been developed to prevent torsional resonance that occurs in the drive system of vehicles, and more effectively prevent muffled noise inside the vehicle interior caused by this torsional resonance. As,
A clutch disk using a fluid as a damper device has been proposed (for example, Japanese Patent Laid-Open No. 120824/1983).

This clutch disk connects an output part having a flange on the outer periphery of an output shaft coupling part and an input member that surrounds this flange and forms a liquid-tight space therein, with an elastic member, and a side surface of the flange and input member. It has a structure in which a liquid-tight space is provided with unevenness and a working fluid is filled inside the liquid-tight space, and when the driving torque is transmitted from the input member to the output member with the relative rotation of each of these members, fluctuations in the driving torque are suppressed. The vibration is absorbed and damped by the spring force of the elastic member and the viscous resistance of the working fluid filled in the liquid-tight space (particularly in the uneven surface).

Problems to be Solved by the Invention Incidentally, in such a clutch disk, since the input member is directly supported by the support portion of the output member without using a bearing, the input member and the input member that rotate relative to each other are This causes unnecessary friction other than the desired damping resistance of the working fluid between the output member and the output member, resulting in unstable damping performance and premature wear of the support portion. Further, this support part and a sealing member for sealing the liquid-tight space are arranged in the axial direction,
For this reason, in this type of clutch disk whose axial dimension is limited, it is difficult to ensure a sufficient length of the support portion, which adds to the wear and tear of the support portion.

Means for Solving the Problems In order to solve these conventional problems, this invention forms annular grooves on both sides of the flange portion of the output member, and also forms an annular bent portion on the drive plate. the bent portion is loosely fitted into the annular groove to form annular voids on the inner and outer peripheries of the bent portion, and a sealing member is disposed in either one of these annular voids; The configuration is such that a bearing is placed on the other side.

Function: In this invention having such a configuration, if a sealing member is placed in the annular gap on the outer circumferential side of the bent portion of the drive plate, the input member can close the flange formed on the output member by the sealing member. The liquid-tight space formed by surrounding the liquid-tight space is sealed liquid-tightly to prevent the working fluid sealed in the liquid-tight space from leaking to the outside. If a bearing is placed in the side annular cavity, the bearing will naturally be placed in parallel with the sealing member in the radial direction, and the bearing will allow the input member and the output member to interact with each other. It acts to allow smooth and stable rotation.

Embodiments Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1a is a partially exploded front view showing one embodiment of the clutch disk according to this invention, and FIG. 1b is a first embodiment of the clutch disk.
It is a - line cross section in figure a.

As shown in FIGS. 1a and 1b, the clutch disk according to this embodiment has a spline coupling portion 1 serving as an output shaft coupling portion on the inner periphery, and a flange portion 2 protruding radially outward on the outer periphery. and an input member 5 which is rotatable relative to the output member 3 and has a cover part 4 that surrounds the outer peripheral side of the flange part 2 and forms a liquid-tight space S therein. Input side arms 6 projecting radially inward at positions equidistant in the circumferential direction of the input member 5, and output side arms 7 protruding radially outward at positions equidistant circumferentially on the flange portion 2. . . . are connected via an elastic body (compression spring) 9 disposed between them. The inside of the liquid-tight space S, specifically the input side arm 6...
A working fluid such as silicone oil is sealed inside each fluid chamber 8 formed between the output arm 7 and the output arm 7. In addition, between each fluid chamber 8...
Specifically, an orifice 10 is provided between the inner periphery of the input member 5 and the outer periphery of the output arm 7 for providing flow resistance to the displacement flow of the working fluid to be performed between the fluid chambers 8. ...is formed.

The input member 5 includes a pair of drive plates 5a, 5b disposed opposite to each other on both sides of the flange portion 2, and a pair of drive plates 5a, 5b disposed oppositely on both sides of the flange portion 2.
A back plate 5c is fitted into the inside of the back plate 5c via a rotation stopper 6b.
The pair of drive plates 5a, 5b are integrally connected at their outer peripheries with cushioning plates 11 by cushioning rivets 12. The back plate 5c includes an annular portion 5d along the inner circumferential surface of each drive plate 5a, 5b, and three input side arms 6 that protrude radially inward at equally spaced positions in the circumferential direction of the annular portion 5d. ..., and the input side arm 6 has a substantially wedge shape that tapers radially inward from the annular portion 5d side.
On the other hand, the output side arm 7 formed on the output member 3...
is located between each of the input side arms 6, and has a fan-shaped shape that expands outward in the radial direction. Each compression spring 9 disposed between the input arm 6 and the output arm 7 is
Two large and small compression springs 9a, 9 arranged concentrically
b, and both ends of each compression spring 9... are connected to the input side arm 6... and the output side arm 7.
Spring receiving surfaces 6a, 7a, respectively formed on...
It is being bombarded by... Further, between the input member 5 and the output member 3, there are seal members 13, 13 for preventing the working fluid sealed in each fluid chamber 8 from leaking to the outside, and the input member 5 and output member 3 are arranged in parallel in the radial direction.
Annular grooves 2a, 2a are formed on both sides of the flange portion 2, and these annular grooves 2a, 2a
Inside are the pair of drive plates 5a, 5b.
Bent parts 5e, 5e formed around the center hole of
are loosely fitted into the bent portions 5e, 5e, and annular void portions 15a, 15 are formed on the inner and outer peripheries of the bent portions 5e, 5e, respectively.
a, 15b, 15b are formed. and,
An annular cavity 15 on the outer peripheral side of the bent portions 5e, 5e
b, 15b That is, the seal members 13, 13 are housed between the outer peripheral surfaces of the bent portions 5e, 5e and the outer peripheral surfaces of the annular grooves 2a, 2a, and the inner peripheries of the bent portions 5e, 5e. Side annular cavity 15a, 15
Bearings 14, 14 are interposed between the inner circumferential surfaces of the bent portions 5e, 5e and the inner circumferential surfaces (hub portions 3a) of the annular grooves 2a, 2a. Furthermore, on the mating surfaces of the pair of drive plates 5a and 5b,
Seal ring 1 for preventing the working fluid sealed inside each fluid chamber 8 from leaking to the outside
5 is interposed. In addition, in FIG. 1b, 16 is a blind stopper that closes the inlet/outlet 17 of the working fluid, and 18
is an annular friction facing attached to the cushioning plate 11 by facing rivets 19.

Next, the operation of the clutch disc according to this embodiment having such a configuration will be explained.

First, when the input member 5 rotates in the circumferential direction with respect to the output member 3 due to the drive torque from the engine, the input arm 6 formed on the back plate 5c constituting the input member 5 moves in the same direction. It will rotate to. Therefore, among the two compression springs 9, 9 disposed on both sides of the input side arms 6, one compression spring 9 is compressed by each input side arm 6. Therefore,
The driving torque is transmitted to the output member 3 via one compression spring 9. At this time, the fluctuation torque and vibration of the drive torque are absorbed by the spring reaction force of one of the compression springs 9. At the same time, the flow resistance of the working fluid passing through each orifice 10 causes attenuation. That is, when the input member 5 rapidly rotates in the circumferential direction with respect to the output member 3, the two fluid chambers 8 separated by the output arms 7 formed on the output member 3 , the pressure in one of the fluid chambers 8 in which the one compression spring 9 is disposed increases rapidly, while the pressure in the other fluid chamber 8 in which the other compression spring 9 is disposed rapidly decreases. Therefore, due to these pressure differences, the working fluid in one fluid chamber 8 flows through the narrow orifice 10 formed between the outer periphery of the output arm 7 and the inner periphery of the input member 5. . . , and is exchanged and inflowed into the other fluid chamber 8. Therefore, each orifice 10 provides a predetermined flow resistance to the displacement inflow of the working fluid, so that the input member 5 with respect to the output member 3
The vibrations in the rotational direction will be attenuated. Also, in such operation, the seal members 13, 13 and the bearings 14, 14 provide effective sealing and smooth relative rotation between the output member 3 and the input member 5.

According to the clutch disk according to this embodiment having such a configuration, annular grooves 2a, 2a are formed on both sides of the flange portion 2 of the output member 3, and
Annular bent portions 5e, 5e formed on the drive plates 5a, 5b are loosely fitted into the annular grooves 2a, 2a, and annular voids 15a, 15a, 15b are formed inside and on the outer periphery of the bent portions 5e, 5e. , 15b, these annular voids 15a, 15a, 15
The seal members 13, 13 and the bearings 14, 14 can be easily attached by fitting the seal members 13, 15b. Then, the annular cavity 15 on the outer peripheral side
Seal members 13, 13 installed inside b, 15b
to liquid-tightly seal between the input member 5 and the flange portion 2 of the output member 3 to prevent the working fluid sealed in the fluid chambers 8...8 from leaking to the outside, Bearings 14, 1 disposed within the annular gaps 15a, 15a on the inner peripheral side of the bent portions 5e, 5e.
4, the input member 5 and the output member 3 can rotate relative to each other smoothly and stably, and it is possible to prevent the damping performance from becoming unstable due to unnecessary friction.
Further, according to this clutch disk, the seal member 13,
13 and the bearings 14, 14 are arranged in parallel in the radial direction, it is possible to ensure a sufficiently long dimension of the bearings 14, 14 without increasing the axial dimension l of the input member 5 and output member 3. can. Therefore, stable bearing of the input member 5 can be achieved, and the clutch disk can be easily incorporated into a power transmission device such as an automobile in which the axial space between the flywheel and the release bearing is narrow.

In addition, in the embodiment shown in the drawings, the bent portions 5e, 5e
The sealing members 13, 13 are arranged in the annular gaps 15b, 15b on the outer circumferential side, and the annular gaps 15, 13 on the inner circumferential side
Although the case is shown in which the bearings 14, 14 are arranged in the inner circumferential annular gap 15,
Seal members 13, 13 are arranged in a, 15a, and bearings 14, 1 are arranged in annular gaps 15b, 15b on the outer peripheral side.
Even if 4 is arranged, the same operation and effect as the embodiment shown in the drawings can be obtained.

Effects of the invention As is clear from the above explanation, according to this invention, there are
Since an annular cavity was formed in each of these,
By fitting the seal member and the bearing into the outer annular cavity, respectively, the seal member and the bearing can be easily attached. The sealing member can prevent the working fluid sealed in the plurality of fluid chambers from leaking to the outside, and the bearing allows the input member and the output member to rotate smoothly and stably. This can prevent the damping performance from becoming unstable due to unnecessary friction. In addition, since the seal member and the bearing are arranged in parallel in the radial direction between the input member and the output member, the dimension of the bearing can be made sufficiently long without increasing the axial dimension of the input member and the output member. This type of clutch disk can be advantageously applied to power transmission devices such as automobiles in which the space for incorporating the clutch disk is narrow.

[Brief explanation of drawings]

FIG. 1a is a partially exploded front view showing one embodiment of the clutch disk according to this invention, and FIG. 1b is a first embodiment of the clutch disk.
It is a - line sectional view in figure a. 1...Spline joint part, 2...Flange part,
3...Output member, 4...Cover part, 5...Input member, 6...Input side arm, 7...Output side arm,
8... Fluid chamber, 9... Compression spring, 10... Orifice, 13... Seal member, 14... Bearing, 15
a, 15b... annular cavity, S... liquid-tight space.

Claims (1)

[Scope of utility model registration request] An output member having a flange portion on the outer periphery of the output shaft coupling portion and an input member having a drive plate surrounding the outer periphery of the flange portion of the output member to form a liquid-tight space therein are connected to each other via an elastic member. In the clutch disk, which is rotatably connected to each other, and in which the liquid-tight space is filled with a working fluid that provides damping resistance to the relative rotation of the input member and the output member, both sides of the flange portion of the output member An annular groove is formed, and an annular bent part is formed in the drive plate, and the bent part is loosely fitted into the annular groove to form an annular gap on the inner and outer periphery of the bent part, respectively. A clutch disk characterized in that a sealing member is disposed in one of these annular gaps and a bearing is disposed in the other.