JPH09210084A - Clutch disc - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a configuration of a clutch disc and obtain stable friction attenuation characteristics for a long time without increasing the number of parts. SOLUTION: A clutch disc is provided with a hub 1 having a plate part 3 formed on outer periphery of a boss part 2 connected with an output shaft 5, a drive plate 9 arranged on one side of the plate part 3 of the hub 1, friction plates 16, 16 connected with outer periphery of the drive plate 9 through a cushioning plate 15, and a spring member I4 which connects the hub 1 and the drive plate 9 elastically in such a manner that they can move relatively. A support tongue piece 21 is formed on an inner side in the radial direction of a basic part of the cushioning plate 15 attached on outer periphery of the drive plate 9, and it faces the other side of the plate part 3 to guide the relative turn of the hub 1 and the drive plate 9 by the support tongue piece 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a good clutch disc applied to a clutch device for controlling power transmission of an automobile or the like.

[0002]

2. Description of the Related Art As a conventional clutch disk of this type, for example, Japanese Utility Model Publication No. 55-5788 discloses a hub having a plate portion formed on the outer periphery of a boss portion connected to an output shaft, and a plate portion of the hub. A drive plate disposed on one side, a friction plate connected to the outer periphery of the drive plate via a cushioning plate, and a spring member that elastically and relatively movably connects the hub and the drive plate. A clutch disc is shown.
In addition, in this clutch disc, a plurality of openings long in the circumferential direction are formed in the drive plate, and the hub and the drive plate are rotatably connected to each other by rivets inserted in the openings, Friction material is interposed between the hub and the drive plate. This clutch disc is incorporated in a clutch device and outputs drive torque input from a friction plate to an output shaft connected to a hub portion of a hub.

[0003]

However, in the above-mentioned conventional example, the hub and the drive plate are rotatably connected to each other by separate rivets. That is, since a rivet is required to guide the relative body rotation, the number of parts may increase, and parts management may be troublesome. Further, although the rivet can connect the hub and the drive plate with a considerable axial force, since the rivet has high rigidity, the friction material interposed between the hub and the drive plate by the relative rotation of the hub and the drive plate. If the wear occurs, the axial force will suddenly decrease, and the friction damping characteristics with respect to the rotation of the phase body may become unstable.

The present invention has been devised in view of the above-mentioned conventional circumstances, and an object thereof is to provide a clutch disc having a simple structure without increasing the number of parts. Also,
Another object is to provide a clutch disc that can obtain stable friction damping characteristics over a long period of time.

[0005]

Therefore, according to the present invention, a hub having a plate portion formed on the outer circumference of a boss portion connected to an output shaft, and a drive plate arranged on one side of the plate portion of the hub are provided. A friction disc connected to the outer periphery of the drive plate via a cushioning plate, and a spring member that elastically and relatively movably connects the hub and the drive plate, the outer periphery of the drive plate A supporting tongue is formed on the inner side in the radial direction of the base of the cushioning plate to be attached to the plate, and the supporting tongue is made to face the other side of the plate. The supporting tongue guides relative rotation between the hub and the drive plate. I am doing it.

The supporting tongue is elastically contacted with the other side of the drive plate.

Here, the cushioning plate is
It is intended to facilitate the connection of the clutch and is preferably formed from a spring plate material having a predetermined elasticity. That is,
The clutch disc is arranged between the flywheel of the clutch device and the clutch cover, the friction plate is pinched between the flywheel and the pressure plate of the clutch cover, and the clutch disc synchronizes with the rotation of the flywheel. The clutch connection is complete. In order to make this clutch connection smooth, it is important to control the time during which the clutch disc slides between the flywheel and the pressure plate.For this reason, cushioning made of a spring plate material with a predetermined elasticity is important. Plates are used.

The spring member connecting the hub and the drive plate may be a coil spring, a rubber spring, or various spring materials that are a combination thereof.

Further, in order to facilitate the relative rotation between the hub and the drive plate, a bearing is provided between the hub and the drive plate, or between the hub and the drive plate, specifically, the plate portion of the hub. It is optional to interpose a friction material that controls friction between the drive plate and the drive plate.

With this clutch disc, when the clutch is connected, the rotational driving force input from the friction plate is subjected to the vibration absorbing action of the spring member, and the friction sliding contact portion between the hub and the drive plate or the friction material is used. Is output to the output shaft connected to the hub boss while being subjected to the friction damping action by the.

At this time, the relative rotation between the hub of the clutch disc and the drive plate is guided by the support tongue provided on the inner peripheral side of the mounting base of the cushioning plate, and the hub and the drive plate are brought into frictional contact with each other. , Proper friction resistance occurs.

In particular, since the support tongue elastically contacts the other side of the drive plate, the plate portion of the hub is pressed against the drive plate with a predetermined spring force. A predetermined frictional resistance can be given to the relative rotation with respect to.

Therefore, since no special component is required to guide the relative rotation between the hub and the drive plate, the clutch disc having a simple structure can be obtained without increasing the number of components.

By elastically contacting the support tongue with the plate portion of the hub, stable friction damping characteristics can be obtained over a long period of time as friction damping characteristics when the hub and the drive plate rotate relative to each other. Obtainable.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a clutch disk showing an embodiment of the present invention, and FIG. 2 is a plan view of the same. In the figure, reference numeral 1 denotes a hub, which has a cylindrical boss portion 2 and a plate portion 3 formed on the outer periphery of the boss portion 2.
A spline 4 is formed on the inner circumference of the cylindrical boss portion 2 and can be connected to the output shaft 5. At a predetermined position on the outer peripheral side of the plate portion 3, a window 6 having a predetermined dimension in the circumferential direction and opening to the outer periphery is formed. Further, a cut-and-raised tongue piece 7 is formed at an end portion of the window 6 (an end on the axial center side of the hub 1), and the cut-and-raised tongue piece 7 is curved to form an arc shape which encloses an outer periphery of a spring member described later. A recess 8 is formed.

Reference numeral 9 denotes a drive plate, which is arranged on one side of the plate portion 3 of the hub 1, that is, on the right side in FIG. 1. The inner peripheral base end portion of the drive plate 9 is bent to form a cylindrical portion 10. Is formed and is rotatably fitted to the outer periphery of the boss portion 2 of the hub 1. In addition, the drive plate 9 has a window 11 for accommodating a spring member, which will be described later, corresponding to the window 6 formed in the plate portion 3 of the hub 1.
Are formed in plural. At each of the ends of the window 11 (ends on the inner peripheral side and the outer peripheral side of the drive plate 9),
A curved support piece 12 capable of supporting the outer periphery of a spring member described later,
13 is formed. It should be noted that it is possible to arbitrarily provide a lubricating layer or dispose a bearing between the inner periphery of the tubular portion 10 and the outer periphery of the boss portion 2.

Reference numeral 14 denotes a spring member composed of a coil spring. The spring member 14 is housed in each of the window 6 formed in the plate portion 3 of the hub 1 and the window 11 correspondingly formed in the drive plate 9, The hub 1 and the drive plate 9 are elastically and relatively rotatably connected to each other.

Friction plates 16 and 16 are connected to the outer periphery of the drive plate 9 via a cushioning plate 15. That is, the cushioning plate 15
Has a base portion 17 to be attached to the drive plate 9 and a corrugated spring portion 18. With the annular friction plates 16 and 16 attached to both sides of the spring portion 18, the base portion 17 is attached to the outer peripheral portion of the drive plate 9. It is attached to. Reference numeral 19 is a rivet for attaching the friction plates 16, 16 to the spring portion 18 of the cushioning plate 15, and 20 is a cushioning plate.
It is a rivet for attaching the base 17 of the boot 15 to the drive plate 9.

A supporting tongue 21 extending radially inward is formed on the base 17 of the cushioning plate 15 attached to the drive plate 9. The supporting tongue 21 is on the other side of the plate portion 3 of the hub 1, that is, in FIG.
At the left side, and preferably in elastic contact with the left side surface.

The clutch disc having such a structure is mounted on the clutch device. That is, as shown in FIG. 1, the friction plates 16 and 16 of the clutch disc are the flywheels 2.
5 can be clamped between the pressure plate 26 and
The pressure plate 26 has a clutch cover 27.
An outer peripheral edge of a disc spring 30 pivotally supported by a rivet 29 is engaged with a pair of fulcrum rings 28, 28.

FIG. 1 shows the connected state of the clutch.
The spring force of the disc spring 30 acts on the pressure plate 26, and the pressure plate 26 presses the friction plates 16 of the clutch disc against the flywheel 25. To release the clutch connection from this state, as is well known, the clutch petal is depressed and the vicinity of the inner peripheral end of the disc spring 30 is pushed through a release bearing (not shown).

Next, the clutch is re-engaged to control power transmission by removing the releasing force applied to the vicinity of the inner peripheral end of the disc spring 30. The operation is as follows. That is, the pressure plate 26 receives the spring force of the disc spring 30 acting on it and moves to the left in FIG.
Start pressing the friction plates 16, 16 against the rotating flywheel 25. At this time, the cushioning plate 15
The spring force of the spring portion 18 of FIG.
The spring force of the spring portion 18 that accompanies the stroke of the pressure plate 26 gradually presses between the flywheel 25 and the pressure plate 26. On this way, the clutch disc rotates while causing a slight slip between the flywheel 25 and the pressure play 26, but the spring force of the disc spring 30 gradually increases, so that the friction plate 16 is increased. , 16 are pinched between the flywheel 25 and the pressure plate 26 by the strong spring force of the disc spring 30, and finally the clutch disc is synchronized with the rotation of the flywheel 25, whereby the clutch connection is completed.

By connecting the clutch, the rotational driving force of the flywheel 25 is transferred from the friction plates 16, 16 to the cushioning plate 15, the drive plate 9,
It is transmitted to the output shaft 5 via the spring member 14 and the hub 1. At this time, the hub 1 and the drive plate 9 relatively rotate via the spring member 14, and this relative rotation is guided by the support tongue 21 provided on the inner peripheral side of the mounting base 17 of the cushioning plate 15. Further, due to the relative friction between the spring member 14 and the hub 1 and the drive play 9, the vibration of the rotational driving force input from the flywheel 25 is absorbed.
Decay. Here, since the support tongue piece 21 elastically contacts the other side of the drive plate 9, the plate portion 3 of the hub 1 is pressed against the drive plate 9 with a predetermined spring force. A predetermined frictional resistance can be applied to the relative rotation between the drive plate 1 and the drive plate 9.

Further, the recess 8 formed in the cut-and-raised tongue piece 7 of the hub 1 and the curved support pieces 12 and 13 formed at the end of the window 11 of the drive plate 9 serve to prevent relative rotation between the hub 1 and the drive plate 9. Advantageously, the spring member 14 housed in the windows 6 and 11 is prevented from being pulled out during movement and stop.

Therefore, since no special component is required to guide the relative rotation of the hub 1 and the drive plate 9, the clutch disc having a simple structure can be obtained without increasing the number of components.

Further, by elastically contacting the supporting tongue piece 21 with the plate portion 3 of the hub 1, as a friction damping characteristic when the hub 1 and the drive plate 9 are relatively rotated,
Stable friction damping characteristics can be obtained over a long period of time.

Although the embodiment has been described above with reference to the drawings, the specific configuration is not limited to this embodiment and can be modified within the scope of the invention.
For example, it is possible to optionally provide a friction material between the plate portion 3 of the hub 1 and the drive plate 9, and in this case, the friction characteristic when the hub 1 and the drive plate 9 are relatively rotated. Stable with friction material.

[0029]

As described above in detail, according to the present invention, since no special part is required to guide the relative rotation of the hub and the drive plate, the number of parts is increased. And a clutch disk having a simple structure can be obtained. Further, by elastically contacting the support tongue with the plate portion of the hub, stable friction damping characteristics can be obtained for a long period of time as friction damping characteristics when the hub and the drive plate rotate relative to each other.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a clutch disc showing an embodiment of the present invention, and is a view taken along line AA in FIG.

FIG. 2 is a plan view of the clutch disk and is a drawing in which a part of the drive plate is cut away.

[Explanation of symbols]

 1 hub 2 boss part 3 plate part 5 output shaft 9 drive plate 14 spring member 15 cushioning plate 16 friction plate 17 base 21 support tongue

Claims (2)

[Claims] 1. A hub having a plate portion formed on the outer periphery of a boss portion connected to an output shaft, a drive plate disposed on one side of the plate portion of the hub, and a cushioning plate on the outer periphery of the drive plate. In a clutch disc provided with a friction plate connected through the spring plate and a spring member that elastically and relatively movably connects the hub and the drive plate, in a radial direction of a base of a cushioning plate attached to an outer periphery of the drive plate. A clutch characterized in that a support tongue is formed on one side and is exposed to the other side of the plate portion, and the relative tongue of the hub and the drive plate is guided by the support tongue. disk. 2. The clutch disc according to claim 1, wherein the support tongue is elastically in contact with the other side of the drive plate.