US 4,905,811 A · Clutch cover assembly

Abstract

A clutch cover assembly, in which a radially inner side spring force action point (an inside projection 44, for example) of a lever 40 is provided at a position radially inward from an outer peripheral edge 33 of a diaphragm spring 30. A radially outer side spring force action point (an outside projection 46) of the lever 40 is positioned at a distance B between a rotation center O1 of the lever 40 and the outer side spring force action point shorter than a distance A between the rotation center O1 and the inner side spring force action point. The lever 40 is adapted to multiply a spring force P of the diaghragm spring 30. The reaction force action point of the diaphragm spring 30 is shifted to an outer peripheral part of the clutch cover 16, so that a deflection of the clutch cover 16 is reduced and a release efficiency is improved.

Claims7

Dependent claims

A clutch cover assembly having an approximately annular disc-like spring member disposed at an outside of a clutch cover covering a pressure plate;

characterized by that the spring member is a diaphragm spring for exerting spring force on said pressure plate;
said clutch cover supporting an outer peripheral part of said diaphragm spring and forming a fulcrum for said diaphragm spring;
a lever pivotally mounted on said clutch cover about a rotation center located at a position radially inward from a spring force transmitting part of said pressure plate;
a radially inner side spring force action point on said lever contacting said diaphgram spring at a position radially inward from said fulcrum of said diaphragm spring;
a radially outer side spring force action point on said lever contacting said spring force transmitting part of said pressure plate;
a distance between the rotation center of the lever and the outer side spring force action point being shorter than a distance between said rotation center and the inner side spring force action point;
said lever multiplying the spring force of said diaphragm spring and applying said multiplied spring force to said pressure plate.

4 more elements

A clutch cover assembly having an approximately annular disc-like spring member disposed at an outside of a clutch cover (16) covering a pressure plate (12);

characterized by that said spring member is a diaphragm spring (30) for applying a spring force to said pressure plate (12);
the clutch cover (16) supporting an outer peripheral part of said diaphragm spring (30) and forming a fulcrum (33) for said diaphragm spring (30);
a lever (40) for multiplying the spring force of said diaphragm spring applied to said pressure plate and pivotally mounted on the clutch cover (16) around a rotation center (01) located at a position radially inward from a spring force transmitting part (45) of said pressure plate (12);
a radially inner side spring force action point (44) on said lever (40) contacting said diaphragm spring at a position radially inward from said fulcrum (33) of said diaphragm spring (30);
a radially outer side spring force action point (44) of said lever (40) contacting said spring force transmitting part of said pressure plate;
a distance (B) between said rotation center (01) of said lever (40) and said outer side spring force action point (46) being less than a distance (A) between said rotation center (01) and said inner side spring force action point (44);
an outer peripheral edge of said diaphragm spring (30) being in compressive contact with an inclining surface (34) of a radially intermediate part of said clutch cover (16);
said inclining surface (34) being formed into a conical surface which inclines toward a radially inner part of said clutch cover;
said diaphragm spring (30) having a notch (31) extending radially from an inner peripheral part of said diaphragm spring;
a pin (32) fitted in an inner peripheral part of the clutch cover extending through said notch;
a shaft (41) for carrying said lever (40);
said shaft (41) being supported by lips (42) formed by raised upright parts of said clutch cover (16);
and said spring force transmitting part (45) of said pressure plate (12) passing through hole (43) in said clutch cover (16) formed by said lips (42).

10 more elements

Dependencies are inferred from the claim text.

Clutch cover assembly

Life of this patent

Clutch cover assembly

Life of this patent

Abstract

Claims7