| 摘要 |
PROBLEM TO BE SOLVED: To provide an outer rotor supporting bearing attachment structure for a multishaft multilayer motor which can enhance the bearing setting work efficiency and enables fitting with material or a structure where the setting of interference fit toleranace is difficult. SOLUTION: In the multiple shaft multilayer motor M, an inner rotor IR and an outer rotor OR are arranged concentrically with a stator S in-between. The motor is equipped with a pair of outer rotor supporting bearings 80 and 81 for supporting the outer rotor case members 62, 63, and 64 for supporting the outer rotor OR to a motor cover 1 and a motor case 2, a resin mold 46 of the component of the stator S is fixed to the motor case 2, and out of the outer rotor supporting bearings 80 and 81 in a pair, the inner ring 80a of the outer rotor supporting bearing 80 on the side where a stator shaft 48 is piercing it is supported to the resin mold part 46. Besides, the linear expansion coefficient of the resin mold part 46 is set larger than the linear expansion coefficient of the inner ring 80a of the outer rotor supporting bearing 80. COPYRIGHT: (C)2004,JPO
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