JPS6137860Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch device used in an automobile, and more particularly to an improvement of a bearing hub of the clutch device.

A release fork that operates to engage and disengage a clutch, a release bearing that is operated by the release fork and moves axially on a driven shaft to press a release lever or a diaphragm spring, and the release fork. Clutch devices having a release bearing and a bearing hub disposed between and coupled to the release bearing are well known in the art.

Among these, bearing hubs are currently made of metal because strength and durability are important.

However, such metal bearing hubs
It is heavy due to the use of lubricants etc.
It also has the disadvantage of high cost. Furthermore, if this hub is molded from a curable resin, there will be a lot of abrasion debris, making it impractical.

Therefore, the object of the present invention is to eliminate these drawbacks and provide a bearing hub that achieves weight reduction and cost reduction.

The gist of this invention is that the structure of the bearing hub is such that reinforcing materials molded from metal materials such as iron are used in areas where strength is required, and the main body is molded from thermoplastic resin in the sliding surface areas. It is in.

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a clutch device 10 of known construction, in which a cover plate 12 is fixed to a flywheel 11 directly connected to an engine. A pressure plate 13 is in contact with the cover plate 12,
A clutch disk 15 is interposed between the pressure plate 13 and the flywheel 11 and is splined onto the driven shaft 14.

A diaphragm spring 18 held by a pivot ring 17 is supported by a pin 16 fixed to the cover plate 12, and an outer peripheral end 18a of the diaphragm spring 18 can come into contact with the pressure plate 13.

A bearing retainer 19 fixed to a transmission housing (not shown) is attached to a driven shaft 1.
4, and a release bearing 20 is fitted into the retainer 19 in the axial direction.

21 is a release hotter, and in the center part,
A protrusion 24 is formed that engages with a protrusion 23 integrally formed on the release hub 22 that is integrally attached to the release bearing 20. A clip 25 is mounted between both protrusions 23 and 24, thereby integrally connecting them.

The leftward movement of the release fork in the axial direction by operating the pedal (not shown) is caused by the release bearing 2.
0 is pressed axially leftward, pressing against the inner peripheral end 18b of the diaphragm spring 18, thereby disengaging the clutch.

The present invention relates to an improvement of the release hub 22 used in the clutch device as described above. In FIGS. 2 and 3, the release hub 22 has a cylindrical resin main body 30 and a metal such as iron integrally formed inside the main body 30. The reinforcing material 31 is made of steel.

Integral molding, as used in the specification of the present invention, refers to inserting a metal reinforcing material into the metal diameter, and then pouring resin into the mold to form the metal reinforcing material and the metal reinforcing material. Refers to a molding method that integrates resin molded products. A circumferential protrusion 32 is formed on one end 30a of the main body 30, and the one end 30a is snap-fitted to the release bearing 20.

The reinforcing member 31 is composed of a cylindrical internal reinforcing portion 31a and a protrusion 31b, and the protrusion 31b faces each other in the radial direction and extends in opposite directions to abut and engage with the protrusion of the release fork 21.

As the resin material for the main body 30, thermoplastic resins (nylon 6, nylon 66, PBT, PP, polycarbonate, etc.) are used, and nylon 6 is particularly preferred.

4 and 5 show a modified example of the release hub 22, and the reinforcing member 31 is an annular inner reinforcing portion 31a.
have.

As explained above, the release hub of the present invention uses metal reinforcing materials such as iron in areas where strength is required, and the main body is made of thermoplastic resin.
Not only is it effective in reducing weight and cost, but
There is no need to use lubricants, and performance is improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a clutch device of known structure;
Fig. 2 is a sectional view of the first embodiment of the release hub according to the present invention, Fig. 3 is a sectional view taken along line AA in Fig. 2, and Fig. 4 is a sectional view of the first embodiment of the release hub according to the present invention.
The figure is a sectional view of a second embodiment of the release hub according to the present invention, and FIG. 5 is a sectional view taken along the line B--B in FIG. 4. DESCRIPTION OF SYMBOLS 10... Clutch device, 20... Release bearing, 21... Release fork, 22... Release hub, 30... Main body, 30a... One end of main body, 31... Reinforcement material, 31a... Reinforcement part within main body,
31b...Protrusion.

Claims (1)

[Scope of utility model registration request] A release fork that operates to engage and disengage the clutch, a release bearing that is operated by the release fork and moves axially on a driven shaft, and a release fork that is provided between the release fork and the release bearing. In the clutch device for an automobile, the bearing hub has a main body formed of resin and one end of which is snap-fitted to the release bearing, a reinforcing portion within the main body, and a radial distance from the main body. 1. A bearing hub for a clutch device for an automobile, characterized in that the bearing hub has a metal reinforcing member formed integrally with the main body and comprising a protrusion extending in the direction.