Outer rotor brushless motor for floor fan and floor fan

The utility model discloses an external rotor brushless motor used for a floor fan, and discloses a floor fan with the external rotor brushless motor used for the floor fan, the external rotor brushless motor used for the floor fan comprises a first casing and a second casing which are connected to form a cavity, the first casing is provided with a through hole, and the second casing is provided with a through hole. A sleeve is arranged around the through hole, and a rotor shaft penetrates through the sleeve. The first casing is provided with a stator iron core, the stator iron core comprises a plurality of stator grooves which are uniformly connected to form an annular structure, and the center of the stator iron core is provided with a center hole for the rotor shaft to pass through. A containing cavity is formed in the stator iron core, a rotor shell is arranged in the containing cavity, the rotor shell is provided with a mounting groove and a connecting part used for being connected with the rotor shaft,