JPS5958232A - Clutch disc - Google Patents

Abstract

PURPOSE:To reduce a clutch disc to a compact size and to maintain and improve the durability of the disc by forming a torsion sheet with nonmetallic or nonferrous lightweight material and providing a sliding portion having a thickness. CONSTITUTION:A torsion sheet 4 is formed of nonmetallc or nonferrous lightweight material such as resin material. The torsion sheet 4 is urged in the opposite direction to each other by torsion coils 5 disposed at the middle portion thereof. Operating receiving pressure is dispersed and decreased by a sliding portion expanded to be of a thickness (t) so as to maintain and improve the durability of a clutch disc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch disc for a disc-type friction clutch.

A disc-type friction clutch has a clutch disc equipped with a friction material sandwiched between a flywheel and a pressure plate, and the friction force generated there is used to transmit torque from the driving side to the driven side. It is well known that in this type of clutch device, each of the plurality of torsion damper sections of the clutch is provided with a torsion seat that supports a torsion coil.

Conventionally, this torsion sheet has been a press-molded product made of a thin veneer of iron.

This type of torsion seat comes into sliding contact with materials belonging to the cylinder, such as disc plates, sub-plates, and clutch hubs, which are generally similar in chemical composition, so there is a high incidence of wear and damage. This poses a problem in that maintenance of durability, that is, maintenance of good latch function over a long period of time, is hindered.

In the present invention, the thin pressed torsion sheet is made of a non-metal or non-ferrous lightweight material, for example, a resin material with a medium thickness at the sliding contact part, In addition to being lightweight, the sliding contact part is expanded into the wall thickness,
The aim is to maintain and improve durability by distributing and reducing the operating pressure.

Therefore, by increasing the area of the sheet contact portion that makes sliding contact with each of the members and reducing the weight, the surface pressure of the contact portion can be lowered, and it can also be expected to prevent flefting wear on the back surface of the wear-resistant sheet.

Furthermore, when a resin material is used, the coefficient of friction in particular is reduced by almost half, and the hysteresis of the torsion characteristics is stabilized both initially and over time. Furthermore, the weight reduction leads to a reduction in the moment of inertia when the device is in use, which can also be expected to improve clutch disengagement performance.

The configuration of an embodiment of the friction clutch of the present invention will be described below.

1 is a disc plate, 2 is a sub-plate, 3 is a clutch hub, and the torsion damper part A is made up of these members.
The members are connected by a plurality of fixing means (not shown). 4 is a torsion sheet, which is different from a thin veneer like conventional products, and has a medium thickness of, for example, 2 to 6 mm, as shown by the symbol t. Claw portion 4a that locks into the four parts of (as seen in Figure 1)
, 4b are formed. (Although the claw portion is provided in this embodiment, the claw portion may not be provided.) As is clear from FIG. Each of them is symmetrically arranged in the torsion damper A portion while being energized in opposite directions.

When resin is selected as the material used for this torsion sheet 4, due to its light weight effect, the centrifugal force exerted on each contact part is reduced by about 115 compared to conventional general products, and it is easy to form, achieving the above-mentioned purpose. The contribution to this is significant.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view of the main part of the clutch disc of the present invention taken in the longitudinal center, and FIG. 2 is a view as seen in the direction of the arrow B in FIG.
(partially broken). 1-----.-disc plate, 2-----1.subplate. 3--Clutch hub, 4--1 Torsion seat. 5・----Torsion coil. Patent Applicant 1 Ireshi M Hiiragi Co., Ltd. Representative Reio Nakai (5) 182 Figure 1 Figure 21 Commissioner of the Japan Patent Office ■, Indication of Case 1982 Patent Application No. 16784.2 2.
Invention σ) Name Clutch Disk 8, Relationship with the Amendment Person Case Patent originator 4, on the 1st page, line 18 of the statement of the date of the amendment order, stated "Name of the 80 Invention" [80 Invention] "Detailed explanation" is corrected. 183

Claims (1)

[Claims] (1) In a clutch disc in which a plurality of torsion damper parts formed by a disc plate, a sub-plate, a clutch hub, etc. of a friction clutch device are provided with opposing torsion sheets each having a torsion coil stretched between them, the torsion The sheet is made of a non-metallic or non-ferrous lightweight material, and the sliding surface with the torsion damper part is within an allowable range in relation to the size of the damper part and the torsion coil, and the set compression length of the coil. A clutch disc with increased wall thickness compared to conventional products. (2. A clutch disc in which the torsion sheet according to claim 1 is made of a resin material.