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AssigneeIna Walzlager Schaeffler oHG
InventorsAlexander Zernickel, Johannes Lang, Jurgen Hartmann
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The inventive bearing arrangement for a device for activating a vehicle brake has a central threaded spindle (2) which is secured against torsion in a fixed housing (1) and which is arranged in such a way that it can be displaced up to a brake disk (3) of the vehicle and from thereon axially. The inventive arrangement is also provided with an inner ring (5) which concentrically surrounds the threaded spindle (2) together with roll bodies. Said inner ring (5) is coupled with a rotating rotor of an electromotor (7) at the front and is supported with the same in the housing (1) by an axial roller bearing and a radial roller bearing so that it can rotate. According to the invention, the axial roller bearing of the inner ring (5) is made up of a planetary gear with several roll bodies serving as planets. Said roll bodies are situated between the inner ring (5) and a bore wall (8) of the housing (1) which is axial to the inner ring (5). This reduces the friction losses of the axial roller bearing.
Bearing arrangement for actuating a brake system comprising a central threaded spindle (2), which is arranged in a stationary housing (1), secured against rotation and arranged for axial displacement toward and away from a brake disc (3) of said brake, further comprising an inner ring (5) which, together with first rolling elements, concentrically surrounds the threaded spindle (2), said ring (5) being arranged for rotation in the housing (1) through a thrust rolling bearing that is constituted by a planet drive which comprises a plurality of second rolling elements forming planets that are arranged between the inner ring (5) and a bore wall (8) of the housing (1) coaxial to the inner ring (5), said inner ring (5) is aligned at one end on the same axis to a rotatable rotor of an electromotor and is additionally retained for rotation with this rotor in the housing (1) through a radial rolling bearing which is constituted by two needle roller bearings whose needle roller bushings (11) bear against the bore wall (8) and the first one of these is arranged adjacent to one end of an outer ring (10) of the thrust bearing and the second one of these is arranged adjacent to the other end of the outer ring (10) of the thrust bearing.
Dependencies are inferred from the claim text.