Patent ID: 8933600
Filing Date: 2015-01-13
Classification: H02K

Abstract:
1. A brushless DC motor structure, comprising: a) a motor body; b) a controller, the controller comprising a box having a box cover, and a control circuit board; the box cover comprising a cylindrical portion having a first cylindrical side wall; the control circuit board being mounted inside the cylindrical portion; and c) a fan radiator, the fan radiator comprising a fan, and a fan cover; the fan cover comprising a top wall, an air inlet disposed on the top wall, a second cylindrical side wall, a bottom, and an opening disposed at the bottom and confined by the second cylindrical side wall; wherein: the motor body comprises a stator module, a rotor module, a rotational shaft, a front end cover, a casing having an outer surface, and a rear end cover; the front end cover and the rear end cover are mounted at two ends of the casing; the stator module and the rotor module are mounted inside the casing; the fan radiator is mounted between the motor body and the controller to disperse heat from the motor body and the controller: an end portion of the rotational shaft mounted on the rotor module extends into the fan cover and the fan is mounted at the end portion of the rotational shaft; the air inlet is directed towards the outer surface of the casing; a plurality of heat sink strips is disposed on the outer surface of the casing; a flow-guided slot is formed between the heat sink strips and the flow-guided slot is connected to the air inlet; the rear end cover is arranged with a through hole connecting with the air inlet; the opening is directed towards the first cylindrical side wall of the box; and the second cylindrical side wall projects radially away from the first cylindrical side wall.