JPH034831Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field Release bearings are components of mechanical devices that operate or release clutches installed between the engine and transmission of automobiles, etc.

This invention is applied to the above-mentioned release bearings, especially self-aligning clutch release bearings.

(2) Conventional technology and its problems This type of release bearing is normally used in Figures 4 and 5.
The structure is as shown in the figure. As shown in the figure, a flange 11 is provided on the outer periphery of the cylindrical sleeve 10.
A side plate 12 is attached to one side of the flange 11, and a ball bearing 20 is attached to the other side. This ball bearing 20 consists of an inner ring 21, an outer ring 22, balls 23, etc., and is attached to the outer periphery of the sleeve 10 by a cylindrical cover 30 that covers the outer ring. That is, a plurality of locking pieces 31 are provided at one end of the cover 30, and these locking pieces 31 together with the flange 11 of the sleeve 10,
A wave spring 33 is inserted between the outer circumferential edge of the side plate 12 and the inward protruding edge 32 provided at the other end of the cover 30 and the outer ring 22 of the ball bearing 20.
The outer ring 22 of is pressed against the flange 11.

Between the inner ring 21 of the ball bearing 20 and the outer periphery of the sleeve 10, and between the outer ring 22 and the inner periphery of the cylindrical cover 30,
An appropriate gap is provided, and the ball bearing 20 is movable in the radial direction within this gap. That is, when the outer end surface 24 of the inner ring 21 comes into contact with a diaphragm spring (not shown) of the clutch, mutual alignment is automatically performed.

The sleeve 10 also includes a cylindrical portion (not shown) provided on the front cover of the transmission.
Since it is slidably fitted into the cover, it is made of a synthetic resin with good sliding properties such as nylon.

In the clutch release bearing as described above, in order to fix the side plate 12 and cover 30 to the sleeve 10, a method is adopted in which the locking piece 31 provided on the cover 30 is caulked to the flange 11 of the sleeve 10.

During this caulking process, the side plate 12 and cover 30
Since the sleeve is made of metal, the flange 11 of the nylon sleeve 10 is easily deformed depending on the shape of the former, and this problem extends to the inner diameter of the sleeve.

Furthermore, as can be understood from FIG. 4 (the portion of the locking piece 31), the caulking process is performed at several locations on the flange 11, and the compressive force due to the caulking process acts strongly on these areas. Therefore, since the flange 11 is strongly restrained by these caulked parts, the expansion and contraction of the sleeve 10 due to temperature changes will not be uniform.
There is a problem that distortion occurs in the shape of the inner diameter of the sleeve.

In addition, since it is necessary to attach the cover 30 directly to the flange 11 of the sleeve 10 by caulking, the outer diameter of the flange 11 must be at least larger than the outer diameter of the ball bearing 20. The flange 11 becomes relatively large, and when the sleeve 10 is injection molded, the flange 11 becomes relatively large.
There is also the problem that 1 has a large effect on the dimensional accuracy of the inner diameter portion of the sleeve.

(3) Purpose of the invention The purpose of this invention is to provide a structure that can solve the above-mentioned problems and eliminate the negative effects on the accuracy of the inner diameter of the sleeve during molding and assembly of the sleeve of the release bearing. be.

(4) Structure of the device In order to achieve the above purpose, in this device, a protrusion with a diameter smaller than that of the ball bearing is integrally formed on the outer periphery of the synthetic resin sleeve, and this protrusion is sandwiched between a side plate and an annular backing plate. The outer periphery of the side plate and the annular backing plate are fixed by caulking with locking portions provided on the cover of the ball bearing.

(5) Effect As mentioned above, the entire circumference of the protrusion provided on the outer circumference of the sleeve is held between the side plate and the backing plate, so the compressive force due to partial caulking is applied to the entire circumference of the protrusion. The protrusions are applied evenly to the sleeve and do not cause distortion of the sleeve, and since the protrusions themselves are relatively small, they do not affect the accuracy of the inner diameter of the sleeve during injection molding.

(6) Embodiments Hereinafter, embodiments of this invention will be explained based on FIGS. 1 to 3. In the figure, the fourth point mentioned earlier
Components that are the same as those of the conventional example shown in FIGS.

As shown in the figure, a protrusion 11' is integrally formed around the entire circumference of the sleeve 10, and both sides of the protrusion 11' are sandwiched between a side plate 12 and an annular backing plate 13.

The annular backing plate 13 is made of a rigid metal or the like, and has an arc-shaped support piece 14 formed on its outer periphery.A locking piece 31' is provided on the cover 30 in correspondence with this support piece 14. The locking piece 31' is caulked to grip and fix the outer periphery of the support piece 14 and the side plate 12. At this time, the protrusion 11' is firmly held between the inner peripheral portions of the side plate 12 and the backing plate 13,
It is made so that it can be fixed to the side plate 12 and the backing plate 13.

In addition, it is preferable to make the circumferential length of the locking piece 31' and the support piece 14 as large as possible so that the compressive force by the locking piece 31' is applied to the entire circumference of the side plate 12 and the backing plate 13 as much as possible. good.

Further, the inner ring 21 of the ball bearing 20 is connected to the backing plate 1.
3, a recess 15 (a convex portion for the protrusion 11') is provided on the inner circumference of the backing plate 13.
Set it up.

The outer diameter of the protrusion 11' is preferably made as small as possible, and is preferably at least smaller than the ball bearing 20.

(7) Effects As mentioned above, relatively small protrusions are provided on the outer periphery of the sleeve, and this is sandwiched between the side plate and the backing plate, so that uniform compressive force is applied to the protrusions. This has the advantage that it does not cause distortion of the sleeve, and does not adversely affect the shape of the inner diameter during sleeve molding.

[Brief explanation of drawings]

Figure 1 is a front view showing an example of the release bearing;
Figure 2 is a vertical cross-sectional view taken along line 2-2 of the same as above;
The figure is an exploded perspective view of the sleeve and the annular cover plate, FIG. 4 is a front view showing a conventional release bearing, and FIG. 5 is a longitudinal sectional view taken along line 5--5 of the same. 10... Sleeve, 11... Flange, 11'
... protrusion, 12 ... side plate, 13 ... annular backing plate,
20...Ball bearing, 21...Inner ring, 22...Outer ring,
30...Cover, 31, 31'...Locking piece.

Claims (1)

[Scope of utility model registration request] An integrated protrusion is provided on the outer periphery of the synthetic resin sleeve,
A side plate is brought into contact with one side of this protrusion, an annular backing plate is brought into contact with the other side, a ball bearing is arranged on this backing plate side, a cover is attached to cover the ball bearing, and on the outer end of this cover,
An inwardly protruding edge facing the outer end surface of the ball bearing is provided, the ball bearing is slidable in the radial direction between the inwardly protruding edge and the backing plate, and a locking piece provided at the inner end of the cover A clutch release bearing in which the outer peripheries of the side plate and the backing plate are gripped and fixed, and the protrusion of the sleeve is clamped and fixed between the side plate and the backing plate.