| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-vibration type motor capable of reducing the vibration of the motor by obtaining stable thrust torque and applying lateral pressure, and attaining easy setting of a cogging position. SOLUTION: An attaching part 3a of a cylindrical magnet 3 is fixed to a center hole 2a, in a rotor 2 having a plurality of fans 8. A shaft 1 is crimped against a hole 3b of the cylindrical magnet 3. At the outer periphery of the cylindrical magnet 3, stators constituted of coils 9 and yokes 4 are arranged so as to face each other. The stators are fixed to a housing 5. A cylindrical attaching part 5a, for pressing a sliding bearing 6 into the center of the housing 5, stands at the center of the housing 5. A magnetic body ring 7 having a slit 7a shown in FIG. (b) is crimped against the outer periphery of the cylindrical attaching part 5a. The lateral torque can be adjusted by changing the width of the slit 7a. A stable load in the thrust direction can be obtained by fitting the magnetic ring 7, dislocated in the thrust direction from the cylindrical magnet 3. COPYRIGHT: (C)2004,JPO
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