| 摘要 |
PURPOSE:To improve rigidity as a complete sheel type frame, to reduce the size and to obtain a structure prevented from the generation of temperature stress by fixing one bearing pressed into a spindle by a stator block and bushes fixed on a frame, engaging the outer wheel of the other bearing with the buses fixed on the frame and applying prepressure in the thrust direction. CONSTITUTION:The bushes 25, 26 are inserted into the united shell type frame 21 and the bearings 23, 24 pressed into the upper and lower parts of a shaft 22 are inserted into the bushes 25, 26. A stator 13 of a motor is held by the stator block 27, which is fixed on the bush 25 with a screw 33. A rotor 18 of the motor is held by a housing 28 and fixed on a shaft 22. The outer wheel 24a of the bearing 24 is provided with a spring 29 for applying prepressure in the thrust direction. To form a sealed structure, the periphery of a lead wire 30 of the motor is sealed with a packing 32 formed between a printed circuit board 31 and the stator block 27.
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