JPS5827129Y2 - clutch release mechanism - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a release mechanism for a friction clutch mainly used in automobiles, and in particular to a type of release mechanism in which a release bearing is constantly in contact with a diaphragm spring.

Generally, in this type of constant contact type clutch release mechanism, even when the clutch is engaged,
The release pairing spring receives vibration from the engine.

Naturally, there is some gap between the release bearing hub and the release fork coupled thereto in order to ensure ease of manufacture and assembly.

For this reason, conventionally, when the release bearing hub is subjected to the above-mentioned vibration, a rattling noise is induced between the hub and the release fork.

In view of these conventional problems, the purpose of this invention is to provide a clutch release mechanism that can suppress the occurrence of rattling noise between the release hair ring hub and the release fork. .

Next, the configuration of this invention will be explained in detail according to an embodiment shown in the drawings.

First, in FIGS. 1 to 3, a cylindrical portion 2 concentric with the input shaft 6 of the transmission is attached to a bearing retainer 1 provided on the front side of a transmission case (not shown) in the front direction (first direction). It protrudes integrally toward the left side of the figure.

A release bearing hub 3 having a release bearing 4 is provided on the outer periphery of the cylindrical portion 2 so as to be able to slide along the cylindrical portion 2 in the left-right direction in FIG.

Now, on the outer periphery of the hub 3, there are two points (
At the top and bottom two places), insert the tip of the release fork 10,
As will be described later, an engaging protrusion 7 for connection with a clip 11 is integrally formed.

Further, a rear side portion following these engaging protrusions 7 is a flat portion 8 on which the tip of the release fork 10 is located.

As shown in FIGS. 2 and 3, these flat portions 8 have mounting grooves 8a cut inward on both sides thereof.

A vibration isolating material 9 made of a material such as synthetic resin is placed over each flat portion 8, and is fixed to the knob 3 side by the mounting groove 8a.

As is generally well known, the release fork 10 has a hole 10a formed in its tip and a hole 7a formed in the engagement protrusion 7 of the hub 3 so that the clip 11
It is coupled to the hub 3 by attaching.

At the joint between the fork 10 and the hub 3, the hub 3
Between the flat part 8 and the fork 10, the vibration isolating material 9 is provided.
There is an intervening state.

However, the mutual sliding contact surface 12 of the engagement protrusion 7 of the hub 3 and the tip of the fork 10 in the release operation transmission direction
Since they maintain rigid body contact (metallic contact) with each other, an increase in invalid stroke during operation of the clutch release system can be avoided.

The release bearing 4 is in constant contact with the diaphragm spring 5, and this contact force is controlled by the operation of the fork 10 in conjunction with the operation of a clutch pedal (not shown), thereby controlling the engagement and disengagement of the clutch.
An operation is performed.

In such a constant contact type clutch release mechanism, as mentioned earlier, the hub 3 is subjected to vibrations through the release bearing 4 not only when the clutch is disengaged but also when the clutch is engaged. .

Despite this vibration of the hub 3, the rattling in the radial direction between the flat part 8 of the hub 3 and the fork 10 is suppressed by the vibration isolating material 9 interposed between them. .

Next, the embodiment shown in FIGS. 4 and 5 will be described.

This embodiment is an example in which a bush type vibration isolator 9A is attached to the tip of the release fork 10.

That is, by attaching the vibration isolating material 9A having a U-shaped cross section to the tip of the fork 10, the flat part 8 of the hub 3
A part of this vibration isolating material 9A is interposed between the fork 10 and the fork 10.

As a result, the same function as the previously described embodiment is achieved.

However, the shape of the vibration isolator 9A is determined so that the mutual sliding contact portion 12 between the retaining protrusion 7 of the hub 3 and the tip of the fork 10 is in rigid contact with each other for the reason stated above. There is.

As described above, this invention is a constant-contact type clutch release mechanism in which the release bearing is in constant contact with a diaphragm spring, etc., in which the release bearing hub and release fork are connected to each other in the direction of transmission of the release motion. The contact surface is a rigid contact, and a vibration isolating material is interposed between the hub and fork in the radial direction. This prevents an increase in the invalid stroke related to clutch release system operation, and also prevents the hub and fork from colliding. It is possible to absorb the vibration between the parts and suppress the occurrence of abnormal noise caused by rattling between them.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a part of the constant contact clutch release mechanism, Figure 2 is a side view of only the release bearing hub seen from the right side of Figure 1, and Figure 3 is a virtual circle of Figure 2. FIG. 4 is a sectional view showing a part of the clutch release mechanism in the second embodiment, and FIG. 5 is a side view showing the enclosed part enlarged. FIG. FIG. 3 is a perspective view showing the relationship with materials. 3... Release bearing hub, I...
Engaging protrusion, 9.9A... Vibration isolation material, 10...
...Release fork.

Claims (1)

[Scope of utility model registration request] At the joint between the release bearing hub and the release fork, the sliding contact surfaces of the knob and the tip of the fork in the release motion transmission direction are in rigid contact with each other, and the knob and the fork are in rigid contact with each other in the radial direction. A clutch release mechanism characterized by having a vibration isolating material interposed between the two.