Drive for an electrically actuatable vehicle brake

Details Drive for an electrically actuatable vehicle brake Drive for an electrically actuatable vehicle brake

1997-08-28

2000-05-09

Graham, Matthew C.

Brakes

Operators

Electric and mechanical

188162, B60T 802

Patent

active

060590769

ABSTRACT:
To form the drive for an electrically-actuatable vehicle brake whose frictional elements can be pressed against a brake disk (38) with the aid of an electric motor (4), the electric motor (4) is connected, by way of a spindle gear that acts, with axial guidance and protection against relative rotation, in the direction of displacement of the frictional elements, to a brake piston (24), which is seated to be axially displaceable and acts on the frictional elements. A pitch-true, planetary-roller threaded (SPWG) spindle (12) known per se is used as the spindle gear, the spindle comprising a spindle shaft (16), a spindle nut (14) encompassing this shaft, and a plurality of barrel or roller bodies (28) disposed between the two, the bodies being provided with grooved profiles (29) that fit the spindle shaft (16). The barrel or roller bodies (28) are seated by a plurality of guide rings (30) or a guide body (30') and bearings (18, 20) disposed between them. The barrel or roller bodies (28) are disposed with fixedly-predetermined spacing relative to the spindle nut (14) and one another.

REFERENCES:
patent: 4658939 (1987-04-01), Kircher et al.
patent: 4793447 (1988-12-01), Taig et al.
patent: 4809824 (1989-03-01), Fargier et al.
patent: 4860859 (1989-08-01), Yamatoh et al.
patent: 4944372 (1990-07-01), Taig
patent: 5107967 (1992-04-01), Fujita et al.
patent: 5829557 (1998-11-01), Halasy-Wimmer

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