Electromechanically actuated disc brake system
AssigneeITT Automotive Europe GmbH
InventorsGeorg Halasy-Wimmer, Karlheinz Bill, Jurgen Balz, Lothar Kunze, Stefan Schmitt
Life of this patent
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Abstract
An electromechanically actuated disc brake system for motor vehicles comprising a floating caliper and an actuating unit mounted with the caliper. The actuating unit is an electric motor which, by interpolation of a reducing gear, powers an actuating element, which in turn controls one of two sliding friction linings mounted inside the brake caliper, to interact with the disc brake. With the intent to reduce axial dimensions of the actuating unit, the present invention includes an electric motor with a rotor of ring-shaped design to radially surround the reducing gear.
Claims15
An electromechanically actuated disc brake system for motor vehicles including a caliper and an actuating unit attached to the caliper, wherein the caliper is adapted to engage two friction linings, each interacting with a respective disc surface, wherein one of the friction linings is direct-controlled by an actuating element, comprising:
- an electric motor, mounted coaxially to the actuating element, and a reducing gear assembly, mounted between the electric motor and the actuating element wherein the electric motor includes a ring-shaped rotor which surrounds the reducing gear assembly in radial fashion, wherein the reducing gear assembly is designed as a threaded roller pinion having a threaded nut linked to the rotor for the purpose of power transmission which is executed via a planetary sear assembly, with a needle bearing and a ball bearing located between the rotor and the threaded nut, each bearing having an internal and an external radial track, wherein the ball bearing's external radial track is defined in the rotor, and its internal radial track is partially defined in the threaded nut.
Dependencies are inferred from the claim text.