Friction clutch with path-controlled wear compensation

Abstract

A friction clutch (10) having a housing (12) with a pressure plate (18) which is arranged in a rotationally conjoint manner and so as to be axially displaceable to a limited extent relative to said housing, which pressure plate can, by a lever system (16) supported on the housing, be displaced axially relative to a counterpressure plate, arranged fixedly with respect to the housing, so as to exert a bracing action on friction linings of a clutch disc, wherein in the event of a spacing, formed when the friction linings are braced, between the pressure plate and counterpressure plate being undershot, positive locking is generated between a pinion (26), said pinion being connected to a spindle of a spindle drive (24) which is arranged on the pressure plate and which serves for the rotational drive of an adjusting ring (22) arranged between the pressure plate and the lever system, and a drive pawl (28) fastened to the housing elastically under preload in the direction of the pressure plate, and said positive locking is eliminated during an actuating movement of the pressure plate relative to the housing after a rotation of the pinion by means of the drive pawl, wherein an axial travel of the drive pawl relative to the pinion is delimited by means of the adjusting ring with a contact surface and with a spacer arranged on the housing, wherein the spacer can make contact with the contact surface over a substantially axial adjustment travel of the adjusting ring, characterized in that the spacer runs through a cutout, formed as a passage, of the lever system to a point of abutment against the contact surface, wherein the contact surface is formed as a base of a cutout which is arranged in a surface, arranged opposite the pressure plate, of the adjusting ring and which is in the form of a base depression. In this way, it is possible to permit an improvement in the accuracy of the wear readjustment and, in so doing, to minimize the required installation space.

Description

technical field [0001] The invention relates to a friction clutch with path-controlled wear compensation. Background technique [0002] Such a friction clutch is known, for example, from DE 10 2008 051 100 A1. Wear compensation of the friction linings in such friction clutches for the wear that occurs during the service life of the friction clutch is brought about by the arrangement of an adjusting ring between the pressure plate and the lever system acting on the pressure plate, wherein the The adjusting ring has a slope arranged in the circumferential direction, which, together with the matching slope arranged on the pressure plate, compensates for the friction between the mating pressure plate and the pressure plate caused by the axially worn friction lining when the adjusting ring is rotated. space, and thus a reduced distance between the mating pressure plate and the lever system. In this way, a substantially constant positioning angle of the lever system, for example...

AI Technical Summary

Problems solved by technology

In this way, a substantially constant positioning angle of the lever system, for example a lever spring or a disc spring, relative to the housing can be achieved by means of a constant actuating force of the friction clutch, which is associated with the positioning angle, during the service life of the friction clutch, However, as the service life of the friction clutch increases, the accuracy of wear readjustment may become inaccurate

Images