Lucas Industries Public Limited Company

Lucas Varity Gmbh

Trw Systemes De Freinage S.a.s.

Michael F Walden

Ralf Erben

René Straub

Rainer Lewenz

Eric Huguet

Christoph Walden

Karl Ehl

Magda Wojcik

René Goebel

Berthold Klump

Harald Boldt

Jean Jacques Maiwurm

Joachim Kremer

A brake caliper formed without machining for a spot-type disc brake, in which the brake caliper after subsequent machining forms a floating caliper, has a braking force generator () and an opposite-lying abutment (). For the non-machining forming of the brake caliper () two mould parts () each partially receiving the brake caliper () are used, in which support surfaces (Q, Q, Q, Q, Q) and action surfaces (S, S, S, S) are formed on the brake caliper () in such a way that the brake caliper () for the subsequent machining is supportable by its support surfaces (Q, Q, Q, Q, Q) in a defined manner and clampable by means of clamping forces acting upon its action surfaces (S, S, S, S). To keep the extent of the subsequent machining to a minimum, during the non-machining forming the abutment () and the support surfaces (Q, Q, Q, Q, Q) of the brake caliper () are formed in one and the same mould part ().

Method of effecting the non-machining forming of a brake caliper as well as a brake caliper formed without machining

A floating caliper brake comprises two bolts (16, 18) which are axially displaceable in bores (20, 22) to guide the floating caliper (10). One bolt/bore pair matches accurately, while the other bolt/bore pair fits together with relatively more clearance. It is provided that the bolt (18) which moves with relatively greater clearance in the bore (22) passes through a guide bushing (30) which is disposed in the bore (22) and the axial dimension of which is much smaller than the effective length of the bolt (18) in order thus to avoid rattling noise of the brake and yet be in a position to manufacture the brake inexpensively, for easy assembly and operational safety.

Floating caliper brake, especially a floating caliper spot type disc

An adjustment device for a brake actuator including a spindle (20) is arranged between an hydraulically movable piston (12) and a mechanically movable tappet (18). The spindle (20) is formed at its outside with left- and right-hand threads (26) and (28), respectively, on which a collet (22) and an adjusting nut (24), respectively, are threaded in non-self-locking manner or, in other words, reversibly. The collet (22) and the adjusting nut (24) form a conical coupling (25) which, when engaged or closed prevents rotation of the structural members so that the adjustment device acts as a rigid member between the tappet (18) and the piston (12).

Brake actuator

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Munich, Georgia

Michael F Walden