| 摘要 |
PURPOSE: To automatically match a bearing, the shaft of a rotor sub assembly and a stator sub assembly by tapering the top of the stator sub assembly and the selected bearing seat on the shaft of a rotor sub assembly. CONSTITUTION: A motor assembly 10 is equipped with a cylindrical stator sub assembly 22 having a stator winding. The stator sub assembly 22 is arranged within a rotor sub assembly 12, and there a center hole 23 having a common axis with the axis 20 of a shaft 18 is made. To fix the rotor sub assembly 12 to the stator sub assembly 22 relatively rotatably around the axis 20, this motor assembly is provided with a lower bearing 24 and an upper bearing 26. At the bearing shaft 18, a shoulder part 36 to position the inner race 28 of the lower bearing 24 is made, while at the outer race 30 of the lower bearing 24, an outward elongation flange 38 to position the stator sub assembly 22 is formed. On the outer race 34 of the upper bearing 26, an outward elongation flange 40 is formed. |
