| 摘要 |
PURPOSE:To reduce the weight of a rotor, by a method wherein a cylindrical section is formed around a sleeve, fitted and fixed to a rotary shaft, while a cylindrical yoke is arranged. CONSTITUTION:A sleeve 1 is fitted and fixed to a rotary shaft of a motor. A cylindrical hollow section is formed around the sleeve 1 and a cylindrical yoke 2 is arranged around the cylindrical section. Both ends of the sleeve 1 and the yoke 2 are held and fixed by flanges 4, 4a. A ferrite magnet 3 is arranged around the yoke 2 and a reinforcing tube member 6 is arranged around the ferrite magnet 3.
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