JPS6257846B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch release bearing device used for controlling on/off power transmission in, for example, a friction clutch for an automobile.

In this type of clutch release bearing device, when a vehicle with a longitudinal engine is targeted, there are fewer restrictions on dimensions in the axial direction than a vehicle with a horizontal engine. As a result, the conventional clutch release bearing device for a longitudinally mounted engine vehicle has a large axial dimension, and the distance between the release bearing and the release fork connection point of the release bearing hub is inevitably set to be long. For this reason, the gap between the inner race and the outer race of the release bearing is exposed on the outer periphery of the hub without any protection, and there is a risk that water may infiltrate into the release bearing. Water entering the release bearing is undesirable because it significantly reduces the durability of this bearing, but as mentioned above, in order to take effective measures to prevent water from entering the clutch release bearing device with a long shaft length, There was a problem that resulted in an increase in the overall weight of the device.

In addition, in conventional clutch release bearing devices, in order to use an easy-to-work linear integral clip to connect the hub and release fork, it was necessary to cut an annular groove on the outer periphery of the hub for attaching the crimp. It is required to secure space and take time for processing work.

The purpose of this invention is to provide a function to prevent water from entering the clutch release bearing with a simple structure;
It is an object of the present invention to provide a clutch release bearing device which can simultaneously obtain a mounting groove of a linear integral clip and which can reduce the overall axial dimension and thereby achieve miniaturization.

The above object of the present invention is to form a stepped portion on the outer periphery of a flange integrally formed with the release bearing hub in order to position the release bearing in the axial direction with respect to the release bearing hub. This is achieved by interposing a washer plate with large dimensions between the inner race of the release bearing and the flange of the hub.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 1 to 3, in the case of a vehicle with a longitudinally mounted engine, the release bearing hub 10 is attached to the outer periphery of an extended cylindrical portion of a front bearing retainer in a transmission (not shown) so as to be slidable in the axial direction. As is clear from FIG. 3, the hub 10 mainly includes a cylindrical portion 11 and a flange 12 having a larger diameter than the cylindrical portion 11. The inner race 21 of the clutch release bearing 20 is press-fitted into the outer periphery of this cylindrical portion 11 from the left side in FIGS. 2 and 3. In this bearing 20, reference numeral 22 indicates an outer race, and 23 indicates a cover that covers the outer periphery of the outer race 22.

As is clear from FIG. 3 and FIG. 4, which is an enlarged sectional view taken along the line - in FIG. 13b is formed. Furthermore, as is clear from FIG. 1, the large-diameter portion 13b has joint portions 14 integrally formed with the release fork 16 at two locations in the circumferential direction thereof.

In this embodiment, before press-fitting the inner race 21 of the clutch release bearing 20 into the cylindrical portion 11 of the hub 10, the center hole 31 of the washer plate 30 is fitted into the cylindrical portion 11. After that, when the inner race 21 of the bearing 20 is press-fitted, the washer plate 30 is interposed between the end surface of the inner race 21 of the bearing 20 and the end surface of the flange 12 of the hub 10, as shown in each drawing. It can be assembled with. The outer diameter of this washer plate 30 is the same as that of the flange 1.
The small diameter portion 1 of the step portion 13 formed on the outer periphery of 2
The dimensions are set to be larger than the outer diameter of 3a (see mainly FIGS. 3 and 4). Therefore, by assembling this washer plate 30, a linear integral clip 17, which will be described later, is attached to the stepped portion 13.
An annular mounting groove 32 for mounting is formed.

Each forked tip of a clutch release fork 16 is coupled to each fork coupling portion 14 of the hub 1 so that a clutch release operation can be transmitted (see FIGS. 1 and 2). These bonds include
Linear integral clip 1 having the shape shown in Figures 5 to 7
7 is used. This linear integral clip 17 has excellent workability for connecting the release fork 16 and the connecting portion 14 of the hub 10.

In this configuration, operation of the clutch pedal (not shown) causes the hub 10, together with the release bearing 20, to slide in the left-right direction in FIGS. 2 and 3 through the movement of the release fork 16. As a result, the pressing force of the outer race 22 of the release bearing 20 against the rotating member (for example, a diaphragm spring) of the friction clutch is controlled, thereby controlling the power transmission in the clutch.

The release fork 16, which transmits the clutch operation, and the hub 10 are connected by the linear integral clip 17, which is easy to work with, as described above. The clip 17 is assembled using the mounting groove 32 formed by the washer plate 30 and the stepped portion 13 formed on the outer periphery of the flange 12 of the hub 10. Therefore, there is no need to specially cut a groove for attaching the linear integral clip to the outer periphery of the hub 10.

In particular, the outer diameter of the washer plate 30 is set to be larger than at least the outer circumference of the small diameter portion 13a of the stepped portion 13 on the outer circumference of the flange 12, in order to form the mounting groove 32. The distance from the outer periphery of the release bearing 20 to the gap between the inner race 21 of the release bearing 20 and the cover 23 on the outer race 22 side becomes longer. Therefore, the effect of preventing water from entering the release bearing 20 is enhanced.

A washer plate 30 is also provided between the outer race 22 of the bearing 20, which contacts and rotates with the rotating member of the clutch, and the clip 17.
Since the clip 17 is interposed therebetween, it is possible to avoid a situation where the clip 17 comes into contact with the rotating part of the bearing 20 and generates abnormal noise.

In this way, the present invention forms a stepped portion on the outer periphery of the flange of the release bearing hub, and a washer plate having an outer diameter larger than the small diameter portion of the stepped portion is interposed between the inner race of the release bearing and the flange. By doing so, the distance between the inner race and the outer race of the release bearing becomes longer, and the function of preventing water from entering the bearing is improved. The constructed annular groove can be used as a mounting groove for a linear integral clip with good workability, and the axial dimension of the release bearing hub can be shortened compared to the case where this mounting groove is separately machined.

Further, in this invention, the washer plate described above can prevent the clip from coming into contact with the outer race of the release bearing, thereby avoiding the occurrence of abnormal noise due to contact between the rotating part and the clip.

[Brief explanation of the drawing]

Figure 1 is a rear view of the clutch release bearing device, Figure 2 is a plan view of Figure 1, Figure 3 is a sectional view taken along the - line in Figure 1, and Figure 4 is an enlarged view taken from the - line direction in Figure 1. 5 is a rear view of the linear integral clip, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is a right view of FIG. 5. 10... Release bearing hub, 11... Cylindrical part, 12... Flange, 13... Step part, 13
a...Small diameter part, 16...Release fork, 1
7... Linear integral clip, 20... Clutch release bearing, 30... Washer plate, 3
2...Annular mounting groove.

Claims (1)

[Claims] 1 The release bearing hub includes a cylindrical part into which the inner race of the release bearing is press-fitted, and a flange that has a larger diameter than the cylindrical part and positions the release bearing in the axial direction, and the release bearing is arranged on the outer peripheral surface of this flange. While forming a step portion with a slightly smaller diameter on the side, before press-fitting the inner race of the release bearing into the cylindrical portion, there is a gap between the inner race and the flange of the hub that is outer than the small diameter portion of the step portion. A clutch release bearing device is provided with a washer plate having a large diameter, and the washer plate and the stepped portion constitute a mounting groove for a clip that connects a hub and a release fork.