Patent ID: 11933387
Assignee: NIDEC MOTORS &ACTUATORS (GERMANY) GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  A  H | IPC F  H

Claim 11:
12. An electromotive actuator, to adjust a height, the electromotive actuator comprising:
an electric, motor with a motor shaft;
a helical gear assembly operatively connected to the motor shaft;
a sleeve shaped friction brake to act on the motor shaft; and
a housing surrounding the electric motor or the helical gearing and including a seat of the friction brake; wherein
the friction brake includes an opening extending in a radial direction with respect to a longitudinal axis of the motor shaft such that the friction brake is attachable to the motor shaft perpendicular or substantially perpendicular to the longitudinal axis;
the friction brake includes a friction surface which includes longitudinally extending and uniformly spaced grooves in the opening;
webs are defined by the grooves with inner sides thereof in contact with the motor shaft and providing a frictional resistance against a rotational driving force of the electric motor;
the friction brake is defined by a one-piece brake made of plastic; and
the braking element includes longitudinally extending ribs on an outside which are evenly spaced along a periphery, one of the longitudinally extending ribs defining a projection of the anti-rotation device.