Drive actuator

US9677332B2 · kind B2 · utility

Assignee

• JOHNSON ELECTRIC S.A. · CH

Inventors

• Sten Waehrisch · Dresden, DE
• Matthias Kulke · Dresden, DE
• Wolfgang Winkler · Dresden, DE

Key dates

• Filing date: Apr 28, 2016
• Grant date: Jun 13, 2017
• Expiry date: Apr 28, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2127/002
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An actuator drive, for blinds, roller shutters and the like, has a drive motor and a centrifugal brake. A rotational disk is coupled to a drive shaft of the drive motor via a shaft flange. Two centrifugal shoes are smoothly guided in the rotational disk. In the unpowered state, brake shoes of the centrifugal shoes engage, frictionally or in a positive-locking way on an outer surface of a friction ring fixed to the motor housing. Upon starting of the drive motor, the brake shoes release the friction ring. The radial displacement of the brake shoes is maintained until the drive motor comes to a stop, wherein the brake shoes 8 are drawn radially inward by spring elements and function again as a locking mechanism. The spring elements are pretensioned such that the brake shoes effect a sufficient retaining torque.