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

Claim 10:
11. 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 brake includes an outer wall and an inner wall which are separated from each other by an air gap, the opening defines the inner wall and the friction surface is on an inner side of the inner wall.