Brush rack maintenance, should be checked frequently.

1, carbon brush frame is easy to damage parts. Remove dust from the carbon brush and keep it in good working condition. Replace it with a new one.

2. Replace the carbon brush. When the brush wears too much.

The contact area of the arc surface of the carbon brush to the commutator or collector ring shall not be less than 75% of the cross section of a single carbon brush. It should be noted that the factory carbon brush arc grinding is only rough grinding, grinding arc generally in the use of motor.

The structure of the carbon brush stand is characterized in that a conductive ring is arranged on the bottom side of the upper nonmetal plate of the carbon brush stand to avoid the central opening of the carbon brush stand and the bottom metal plate of the carbon brush stand. The two ends of the conductive ring are in a conductive form with the conductive element on the nonmetal plate in the upper layer of the carbon brush frame, and one end of the conductive ring is connected with a wire for conducting; The other end of the wire is conducted by connecting with a fixing screw, which is fixed to the appropriate part of the motor housing in an insulating interval that does not form a conductive gap with the housing, and the screw rod of the fixing screw is protruded out of the housing.