Motor shell polishing device

The invention relates to the technical field of motor shell machining, in particular to a motor shell grinding device which comprises a base, a mounting box is fixedly connected to the outer wall of the top of the base, a clamp mechanism is arranged on the outer wall of one side of the mounting box, a rectangular opening is formed in the outer wall of the top of the base, and a dust suction cover is fixedly connected to the inner wall of the rectangular opening. An auxiliary assembly is installed on the outer wall of one side of the base, a collecting box is fixedly connected to the outer wall of the bottom of the base and communicates with the dust suction cover, and the clamp mechanism comprises a rotating base rotationally connected to the outer wall of the mounting box. The defects in the prior art are overcome, the three adjustable pressing seats are arranged on the clamp mechanism, a motor shell needing to be ground is conveniently clamped and fixed from the interior through the three pressing seats, th