Automatically adjusting friction clutch with torsion spring hous

192 clutches and power-stop control – Clutches – Axially engaging

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Details

192 7025, 192111A, F16D 1350

Patent

active

060532971

ABSTRACT:
A friction clutch for a motor vehicle includes a cover, a pressure plate, a biasing member and an adjustment mechanism. The adjustment mechanism includes a first annular cam, a second annular cam and a torsional spring and housing assembly. The cover has an axis of rotation. The pressure plate is coupled to the cover for rotation therewith about the axis. The pressure plate has a frictional engagement surface substantially normal to the axis. The biasing member is interposed between the cover and the pressure plate, and biases the pressure plate toward an engaged pressure plate position. The adjustment mechanism is centered about the axis and is located at a first radial distance from the axis. The adjustment mechanism is operably disposed between the biasing member and one of the pressure plate and the cover. The first annular cam is rotatably fixed with respect to the pressure plate and the cover. The second annular cam is rotatable relative to the first annular cam. Both cams have a plurality of mutually engaged cam surfaces configured such that rotation of the second cam relative to the first cam in a first direct increases a height of the adjustment mechanism. The torsional spring and housing assembly includes a torsional spring and a housing. The spring is coiled around an inner diameter portion of the housing. The spring arcuately overlaps itself. The spring has a first end connected to the second annular cam ring. The spring has a second end connected to the housing. The housing as an inner diameter portion which serves as a spool for the torsional spring. The housing has a first flange extending radially outwardly from the inner diameter portion. The flange and the inner diameter portion define a channel in which the torsional spring is disposed and retained. The housing is rotatably fixed relative to the pressure plate.

REFERENCES:
patent: 5069322 (1991-12-01), Mizukami et al.
patent: 5129799 (1992-07-01), Scheldorf
patent: 5251737 (1993-10-01), Flotow et al.
patent: 5566804 (1996-10-01), Gochenour et al.
patent: 5791448 (1998-08-01), Gochenour et al.
Pending U.S. Patent Application Serial No. 08/993,164, filed on Dec. 18, 1997, entitled "Automatically Adjusting Friction Clutch With Overadjustment Projection and Reset Mechanism".

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