Motor brush running-in device

The utility model discloses a motor brush running-in device, which comprises a bottom plate, a motor arranged along the long side direction of the bottom plate is fixedly mounted at one end of the upper surface of the bottom plate, and a connecting chassis is fixedly connected onto an output shaft of the motor. The multiple grinding base plates are installed on the connecting base plate through the butt joint assembly according to needs, then the carbon brush needing to be ground is placed in the carbon brush shell, at the moment, the end of the carbon brush makes close contact with the surface of the grinding wheel under the elastic force effect of the elastic assembly, the multiple grinding wheels are driven by the motor to rotate, and the grinding wheels are made to grind the end of the carbon brush; meanwhile, the bristles clean powder adhered to the surface of the grinding wheel, the multiple grinding base plates and the grinding wheel are arranged in a matched mode, the number of the grinding base plate