Carbon brush assembly for motor shaft current grounding and mounting structure thereof

Abstract

The invention relates to the field of motors, and discloses a carbon brush assembly for motor shaft current grounding. The carbon brush assembly comprises a carbon brush and a carbon brush holder which is provided with an opening at one end and is used for accommodating the carbon brush, a spring is arranged between the end, located in the carbon brush holder, of the carbon brush and the bottom inthe carbon brush holder, the end, located in the carbon brush holder, of the carbon brush is connected with a connecting wire, and the other end of the connecting wire is connected to the carbon brush holder. The invention further discloses a mounting structure of the carbon brush assembly for motor shaft current grounding. The carbon brush assembly for motor shaft current grounding and the mounting structure thereof are simple to mount and maintain and are low in cost.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a carbon brush assembly and an installation structure thereof for electric motor shaft current grounding. Background technique [0002] The motor of a new energy vehicle usually generates a shaft current on the motor shaft during work. The shaft current is the current flowing through the motor shaft, bearing and motor housing. In the actual use of the motor, due to the existence of the shaft current of the motor, the shaft current flowing through the bearing will cause electrical corrosion to the bearing, making the bearing work unstable, and then causing the temperature of the bearing to rise and cause premature failure. [0003] In order to protect the bearing, the motor shaft current needs to be connected to the motor shaft through the conductor installed on the motor housing to ground the current (the motor housing is connected to the body ground), so that the shaft c...

AI Technical Summary

Problems solved by technology

However, the problems in the above-mentioned prior art are: adding a slip ring to the motor shaft has a complex structure, which increases manufacturing difficulty and cost; opening a hole at the end of the motor shaft to install a graphite rod requires special processing of the shaft, and the graphite rod For special fixing, at the same time, this structure is only suitable for the non-shaft extension end at the rear end of the motor, and it is inside the motor, which is inconvenient for installation and maintenance

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