Patent ID: 6059076
Filing Date: 2000-05-09
Classification: B60T,F16D,F16H

Abstract:
A drive for an electrically-actuatable vehicle brake whose frictional elements are operable to be pressed against a brake disk (38) with the aid of an electric motor (4), with the electric motor (4) being 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 wherein the spindle gear comprises a pitch-true, planetary-roller threaded (SPWG) spindle (12), the spindle comprisinga spindle shaft (16) coaxial with an axis of the electric motor, a spindle nut (14) encompassing the shaft, and a plurality of barrel or roller bodies (28) disposed between the two, the bodies being provided with grooved profiles (29) that fit a thread (17) on the spindle shaft (16), with the barrel or roller bodies (28) being seated by guide means (30, 30') and bearings (18, 20) disposed between the guide means and the barrel or rollers bodies, and the barrel or roller bodies (28) being disposed with fixedly-predetermined spacing relative to the spindle nut (14) and one another.