Outer rotor brushless motor and assembling method thereof

The invention provides an outer rotor brushless motor and an assembling method thereof. The outer rotor brushless motor comprises a rotor assembly and a stator assembly. The rotor assembly and the stator assembly are rotationally connected through a first bearing and a second bearing which are coaxially distributed at an interval; glue solution is coated between the inner rings of the first bearing and the second bearing and the rotor assembly and/or between the outer rings of the first bearing and the second bearing and the stator assembly, and the glue solution is used for curing when the first bearing and the second bearing are in a pre-pressing state. And in the pre-pressing state, the inner and outer rings of the first bearing and the second bearing are staggered in opposite directions based on respective axial clearances. According to the outer rotor brushless motor and the assembling method thereof provided by the invention, the problem that the performance of the motor is reduced due to the fact that