| 摘要 |
PURPOSE:To protect a lead screw against damage when a rotor is fixed to a stator case by securing a bearing for supporting a shaft at an end part thereof to the bottom face part of a motor body, making a hole larger than the outer diameter of the rotor core through the body cover, inserting the rotor into the hole and supporting the shaft. CONSTITUTION:A rotor core 11a comprising a permanent magnet is bonded through adhesive to a shaft 11b with lead screw thus forming a rotor. A stator stopper 12 is positioned with respect to a stator case (SC) 16 and a hole 12a larger than the outer diameter of the rotor core 11a for passing the rotor core 11a is made through a cover for confining stator cores 13a, 14a, 13c, 14c and coils 13b, 14b to the SC 16. A spring 17 fixed to a fixing part 16a on the outer periphery of the SC 16 urges the shaft 11b in the axial direction thus eliminating backlash. A bearing 15 supports the shaft 11b, being fixed to the joint of the stator cores 13c, 14c of the SC 16, at an end part thereof. |
