Electric motor with electromagnetic brake

Abstract

The present invention provides a motor with an electromagnetic brake capable of maintaining a braking torque even when a power supply becomes disconnected. A motor (1) with an electromagnetic brake, comprising a driving motor (2) and an electromagnetic brake (3), the electromagnetic brake (3) having a brake rotor (12), a brake stator (13) and a braking coil Pipe (14), the brake rotor (12) and the motor shaft (9) rotate integrally, wherein the motor (1) with electromagnetic brake is provided with a thrust generating mechanism (5) and a braking motor (6), The thrust generating mechanism (5) can convert the rotary motion into a linear motion to generate a thrust that moves the brake stator (13) forward to the brake rotor (12) side, and can maintain the state of braking the motor shaft (9) , the brake motor (6) applies torque for generating thrust to the actuator (5).

Description

technical field

[0001] The present invention relates to an electric motor mounted on a vehicle as a driving force source, and more particularly to an electric motor equipped with an electromagnetic brake of an excitation operation type that brakes a motor shaft (output shaft) by using an electromagnetic force generated during energization. move. Background technique

[0002] Patent Document 1 describes an invention related to a motor with an electromagnetic brake. In the motor with an electromagnetic brake described in Patent Document 1, a brake rotor of the electromagnetic brake is fixed to one end of a motor shaft (an output shaft of the motor). The electromagnetic brake is composed of a brake rotor having a cylindrical portion fixed to the motor shaft with a set screw and a disc portion on which a friction plate is mounted, and a brake stator having an armature, a spring, and an electromagnet. The armature is capable of approaching and moving away from the friction plat...

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