Miniature outer rotor brushless direct current motor

The utility model discloses a miniature outer rotor brushless direct current motor, which comprises a casing, and a fixed shaft, a stator winding, a rotor casing, a permanent magnet, a bearing and an output shaft which are respectively positioned in the casing, one end of the fixed shaft is fixed on the casing, and the other end of the fixed shaft is connected with an inner ring of the bearing; an outer ring of the bearing is connected with the inner side wall of the rotor shell and the inner side wall of the output shaft, the stator winding is fixed to the middle section of the fixing shaft, and the permanent magnet is located on the outer side of the stator winding and fixed to the inner side wall of the rotor shell. The rotor shell drives the output shaft to rotate through the outer ring of the bearing to output torque outwards; bearings do not need to be installed between the fixing shaft and the machine shell and between the fixing shaft and the stator winding, so that the structure is more compact, and