| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor rotor, which has vibration-proof structure where the concentricity is less apt to drop, and a motor. SOLUTION: The motor rotor 3 is equipped with an annular outer core 35, where a permanent magnet 33M is provided at its peripheral face, an annular inner core 34, which is arranged inside this outer core 35 and in which a shaft 32 is fitted in its inner peripheral face; and an elastic body 38, which is interposed in a circular storage 36 that is formed by the inner peripheral face of the outer core 35 and the peripheral face of the inner core 34. The storage 36 has a plurality of minute clearances sections 36a; the radial width of each of which becomes minute; and for these minute clearance sections 36a, each of the clearance width changes continuously in its circumferential direction. The elastic body 38 acts as a shock-absorbing material which absorbs the vibration generated in a motor rotor 3. Slippage of concentricity between the outer core 35 and the inner core 34 can be minimized by the minute clearance section 36a. Since the clearance width of the minute clearance section 36a changes continuously in its circumferential direction, vibration is less apt to propagate. COPYRIGHT: (C)2009,JPO&INPIT
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