Convenient assembling auxiliary tool for case and stator of servo motor

The invention discloses a convenient assembling auxiliary tool for a case and a stator of a servo motor. The tool comprises a base, a guide rod, a support ring, a positioning ring and a guide ring; the upper end of the base is connected with the guide rod, and a base convex column is arranged at the upper end of the base; the support ring and the positioning ring are mounted at the upper end of the base; the outer wall of the base convex column is attached to a stator. The guide ring comprises a mounting table, and arc-shaped through holes are uniformly distributed in the inner wall of the mounting table; balls are attached to the interiors of the arc-shaped through holes. A gland is mounted at the lower end of the mounting table, the balls are exposed out of the arc-shaped through holes,and abut against the stator, and the upper end of the mounting table is provided with a heat insulation ring, wherein the gland and the arc-shaped through holes limit the balls between the gland and the heat insulation ring;