| 摘要 |
PURPOSE:To prevent a core from displacing by securing a pair of pole cores on the outer periphery of a bushing shaft to increase the spline of the bushing shaft coupled with the spline of a shaft of a rotary machine. CONSTITUTION:A pulley 11 for transmitting the drive of an engine via a belt is coupled with one end of a rotational shaft 9 of a vacuum pump 1. A generator 2 is formed of a pair of cup-shaped frames 15, 16, and a stator 17 is provided on the inner periphery. A pair of pole cores 5, 6 disposed on the inner periphery of the stator 17 are press-fitted to the outer periphery of one end of a cylindrical bushing shaft 3. A spline connector between the spline 9a of the shaft 9 and the spline 3a of the shaft 3 can be extended to the inside of the core 5.
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