JPS60159422A - Release bearing holder for clutch - Google Patents

Abstract

PURPOSE:To provide a light weight release bearing holder which does not wear away the shaft portion of a transmission case by molding a tubular holder body with synthetic resin to bond a slide material to the inner peripheral surface of the holder body. CONSTITUTION:A holder body 4 of a release bearing holder 3 is formed of polybutylenetelephthalate resin (PBT). To the inner peripheral surface of the holder body 4 is bonded a bushing 11 made of a slide material having low coefficient of friction and excellent stability of heat, for example tetraethylenefluoride resin. Also, the inner peripheral edge of both openings of the bushing 11 are bevelled to prevent the interference with a shaft portion 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch release bearing holder.

In recent years, there has been a demand for lighter automobiles from the viewpoint of energy conservation, and various component parts are made of light metals or synthetic resins.

However, since the clutch release bearing holder has conventionally been made of iron-based material, it is heavy and does not meet the demand for weight reduction. Furthermore, if the transmission case is made of magnesilium or alloy to reduce its weight, even if the shaft of the case and the iron-based release bearing holder that slides thereon are lubricated with grease, etc., the shaft will not last long. There is a problem that the part is ground and worn by the release hair ring holder.

In view of the above, an object of the present invention is to provide a release bearing holder that is lightweight and does not wear out the shaft portion of a transmission case, and includes a cylindrical holder body molded from synthetic resin, and a cylindrical holder body made of synthetic resin. The bushing is made of a sliding material and is bonded to the inner peripheral surface.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. 1 is a transmission case made of magnesium alloy;
A clutch shaft 10 is supported on the inner peripheral surface of the shaft portion 2 via a bearing 9, and a cylindrical holder main body 4 of a synthetic resin release hair ring holder 3 is slidably fitted on the outer peripheral surface of the shaft portion 2. A release hair ring 5 is attached to the outer peripheral surface of the holder body 4, and the release hair ring 5, the flange portion 6 of the boulder body 4, and the side plate 13 are sandwiched together by a cover 14. A bifurcated release arm 7 is engaged with the side plate 13, and when the release shaft 8 connected to the release arm 7 is rotated clockwise in FIG. The clutch is released by sliding it to the left.

Next is the second one. To explain the release hair ring holder 3 in detail with reference to FIG. 3, the boulder body 4 is molded from polybutylene terephthalate resin (PBT), and its inner peripheral surface has a low coefficient of friction and excellent thermal stability. A bushing 11 made of a sliding material such as tetrafluoroethylene resin is joined. The inner peripheral edges of both openings of the bush 11 are chamfered to prevent galling with the shaft portion 2.

Further, the flange portion 6 includes a plurality of ribs 15 radially protruding from the outer circumferential surface of the boulder body 4 and an annular portion 16 connecting the tips of the ribs 15. As a result, the weight of the release bearing holder 3 is reduced.

In addition, since the flange portion 6 having the plurality of through holes 12 shrinks less during cooling after molding, the peripheral wall of the holder main body 4 is pulled radially outward due to the contraction of the flange portion 6 and expands. Therefore, deformation of the holder main body 4 can be prevented.

The boulder body 4 and the bushing 11 may be joined using an adhesive, but when the holder body 4 is injection molded, the bushing 11 is placed in the cavity and the holder body 4 is molded and the bushing 11 is bonded to the bushing 11 at the same time. If they are joined together, it is extremely easy to mass-produce.

As described above, according to the present invention, since the cylindrical holder main body is molded from synthetic resin, it is possible to reduce the weight of the release bearing holder and improve its mass productivity. Furthermore, since a sliding material is bonded to the inner circumferential surface of the holder body, wear of the holder body and the transmission case shaft portion can be prevented.

[Brief explanation of drawings]

Fig. F is a sectional view of the essential parts of a clutch equipped with a release hair ring holder according to the present invention, Fig. 2 is a view of the release bearing holder in Fig.
It is an I line sectional view. 3... Release hair ring holder, 4... Cylindrical boulder body, 11... Bush Patent applicant Honda Motor Co., Ltd. Figure 1

Claims (2)

[Claims] (1) A clutch release ring holder comprising a cylindrical holder body molded from synthetic resin and a bushing made of a sliding material joined to the inner peripheral surface of the holder body. (2) The clutch release hair ring holder according to claim (1), wherein the sliding material is a tetrafluoroethylene resin.