Direct-current motor provided with security insulator

Abstract

The invention discloses a direct-current motor provided with a security insulator. The direct-current motor comprises a housing, a brush carrier located in the housing, and a rear end cover. An insulator is arranged between the rear end cover and the brush carrier, and the insulator, the rear end cover and the brush carrier are fixed through bolts. The insulator is composed of an insulating plate and an insulating upright column. The insulating plate is matted on a brush plate of the brush carrier. The insulating upright column is extended from the insulating plate into the rear end cover. The direct-current motor of the invention has the following advantages that the insulating plate and the insulating upright column of the direct-current motor insulator have an integrated structure, so the insulator not only can be easily fixed in the motor, and but also the insulator is used to isolate the brush carrier from the rear end cover to make the brush carrier from the rear end cover be in electric insulation, so the short-circuit condition between electrodes of the motor will not occur; and the motor insulation performance will not be reduced due to reasons, such as dust accumulation, increased humidity, etc., after long-term use, and at the same time, advantages of simple structure and convenient replacement can be realized.

Description

technical field [0001] The invention relates to a direct current motor, in particular to a direct current motor with a safety insulator. Background technique [0002] For DC motors used in motor vehicles, an insulating device is usually provided between the brush holder and the end cover, including an insulating pad that matches the brush plate on the brush holder and an insulating sleeve that cooperates with the end cover. Such a split insulating device is fixed It is more cumbersome, and if there is a deviation between the two fixings, it will easily lead to a short circuit between the poles of the motor, which will pose a safety hazard; at the same time, if the insulation device is used for a long time, the split insulation device will be damaged due to dust accumulation, increased humidity, etc. This leads to a decrease in insulation performance. Moreover, two parts are required to be replaced during maintenance, which is troublesome. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

[0002] For DC motors used in motor vehicles, an insulating device is usually provided between the brush holder and the end cover, including an insulating pad that matches the brush plate on the brush holder and an insulating sleeve that cooperates with the end cover. Such a split insulating device is fixed It is cumbersome, and if there is a deviation between the two fixings, it will easily lead to a short circuit between the poles of the motor, posing a safety hazard; at the same time, if the insulation device is used for a long time, the split insulation device will be damaged due to dust accumulation, increased humidity, etc. It leads to a decrease in insulation performance. Moreover, two parts are required to be replaced during maintenance, which is more troublesome.

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