Patent ID: 7180219

Claim:
A DC motor with a pair of externally mounted carbon brushes, comprising a housing having a front end cover and a back end cover, a magnet adjacent an inner surface of the housing, a rotor within the housing and rotatable around a rotary shaft, a commutator affixed adjacent said back end cover and operatively connected to the rotor, characterized in that: an outer wall of the back end cover is provided with two mounting holes in which two annular brush brackets with identical structures are respectively mounted, a radial sliding tube containing one of the carbon brushes therein is located in each of said brackets, a first end of said carbon brush in the sliding tube contacts the commutator and a second end of the carbon brush is biased, by means of a spring pressing against a brush cap affixed on a back end of the radial sliding tube, said second end of the carbon brush is connected to a first copper sheet through a brush shunt, said copper sheet being held against the back end of the sliding tube and a wire for connecting a power source is lead out from an outlet of a second copper sheet on an outer wall of the radial sliding tube.