Direct current motor with limit switch device in brush box

Abstract

The invention discloses a direct current motor with a limit switch device in a brush box, and relates to the technical field of direct current motors. The direct current motor with the limit switch device in the brush box comprises a machine shell, a stator and a rotor, wherein the stator is fixedly connected in the machine shell, the rotor is arranged in the stator, the brush box is arranged above a commutator of the rotor, and an electric brush is arranged in the brush box. The direct current motor further comprises a warning device which comprises the limit switch, the limit switch is connected with the brush box, and the other end of the limit switch is arranged to make contact with the electric brush. Due to the fact that the limit switch is installed on the inner wall of the brush box, when the electric brush is installed in the brush box, because the new electric brush is longer, the electric brush presses a button of the limit switch in an abutting-against mode, after the electric brush of the motor is used for a period of time, the surface of the electric brush and the surface of the commutator are abraded, and the limit button in the brush box pops up without pressing of the electric brush, so that a warning sound is started to remind a user to replace the electric brush of the direct current motor in time, therefore, faults are avoided, economic losses are reduced, the reliability of motor operation is improved, and service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of DC motors. Background technique [0002] The existing DC motor mainly includes a casing, a stator and a rotor. The stator is fixedly connected in the casing, the rotor is arranged in the stator, a brush box is arranged above the commutator of the rotor, and a brush is arranged in the brush box. Since the brush uses After a period of time, the surface of the brush and commutator wears out, shortening the original length, prone to breakage of the brush, damage to the surface of the commutator by the pressure spring, and sparking due to low pressure. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a DC motor with a limit switch device in the brush box, which has an alarm function when the surface of the brush and the commutator are worn to a certain extent, thereby prolonging the service life of the motor . [0004] The ...

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Problems solved by technology

[0002] The existing DC motor mainly includes a casing, a stator and a rotor. The stator is fixedly connected in the casing, the rotor is arranged in the stator, a brush box is arranged above the commutator of the rotor, and a brush is arranged in the brush box. Since the brush uses After a period of time, the surface of the brush and the commutator wears out, shortening the original length, prone to breakage of the brush, damage to the surface of the commutator by the pressure spring, and ignition due to low pressure.

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