Electric-motor brake actuator of a motor vehicle parking brake

摘要

A particularly cost-effective electric-motor brake actuator which is useable in a highly flexible manner in respect of structural boundary conditions has an integrally formed cup which is equipped with a permanent magnet assembly and can be equipped with a separately manufactured, electromagnetic rotor assembly. In this manner, the equipment outlay is reduced as is the construction costs.

主权项

1. An electric-motor actuator, comprising:
a cover; a housing part produced from an injection-molded synthetic material and having a drive region, a transmission region, an output region, and a cup provided in said drive region, said cup opening towards said cover and having an inner peripheral surface and a cup base; a gear box disposed in said housing part; wheel shafts mounted in a case of a two-sided bearing configuration on one side in said gear box and on the other side in said cover; a permanent magnet assembly held on said inner peripheral surface in a sleeve-shaped manner, said permanent magnet assembly having at least two permanent magnetic elements of alternating polarity of magnetic poles, said permanent magnetic elements being disposed adjacent to one another spaced apart on a periphery, said permanent magnet assembly further having a sheet metal ferromagnetic flux guide, said permanent magnetic elements are provided at a rear with said sheet metal ferromagnetic flux guide; and an electromagnetic rotor assembly disposed in said permanent magnet assembly and mounted on said cup base, said electromagnetic rotor assembly having a shaft with an upper end face lying opposite a lower end face, said electromagnetic rotor assembly inserted in a coaxial manner by said upper face end of said shaft being received outside said cup in said cover.