Patent ID: 8415843

Claim:
A micro brushless motor comprising: a stator and a rotor rotatably mounted to the stator, wherein the stator comprises a housing, a stator core fixed to the housing, and a plurality of openings formed in two ends of the housing; the rotor comprises a shaft, a rotor core fixed onto the shaft, and magnets fixed to the rotor core, two plastic covers fitted to respective ends of the rotor core, one of the two covers covering one end of the rotor core and at least a part of the radially outer peripheral surface of the rotor core, the other one of the two covers at least covering the other end of the rotor core; wherein a plurality of fins are integrally formed in at least one of the covers to generate air flow when the rotor is rotating and the air flow flows along an air passage which comprises the openings formed in one end of the housing, gaps inside the motor and the openings formed in the other end of the housing.