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    • 10. 发明申请
    • SPINDLE MOTOR AND DISK DRIVE DEVICE USING THE SAME
    • 使用相同的主轴电机和磁盘驱动器件
    • US20090072642A1
    • 2009-03-19
    • US11912948
    • 2006-05-19
    • Kenichi MiyamoriShigeo ObataHiromitsu NodaHiromi Kita
    • Kenichi MiyamoriShigeo ObataHiromitsu NodaHiromi Kita
    • H02K5/16
    • G11B33/12G11B19/2009G11B33/123H02K7/085
    • A spindle motor and a disk drive device are provided that has a high operation efficiency of the motor, that does not leak oil, and that has an improved stability by decreasing a runout component in the direction of the rotation axis. The spindle motor includes rotor hub (20) composed of disk-like flange (201) and cylinder-shaped shaft (203); ring-shaped rotating magnet (16) fastened on one main surface of flange (201); armature (14) facing rotating magnet (16); sleeve (80) rotatably supporting shaft (203); and chassis (15) fixing armature (14) and sleeve (80). Flange (201) and shaft (203) are integrally formed with magnetic material; a protrusion is not provided between mounting surface (204) for mounting rotating magnet (16) thereon and counter-face surface (205) facing the end surface of the sleeve; and additionally mounting surface (204) and counter-face surface (205) are orthogonal to the direction of the central axis (A-A′) of shaft (203), and in a level plane; or mounting surface (204) is recessed stepwise from counter-face surface (205) toward disk mounting portion (202).
    • 提供了一种主轴电动机和磁盘驱动装置,其具有电动机的高操作效率,不会漏油,并且通过减小旋转轴线的方向上的跳动分量而具有改善的稳定性。 主轴电动机包括由盘状凸缘(201)和圆柱形轴(203)构成的转子轮毂(20)。 紧固在凸缘(201)的一个主表面上的环形旋转磁体(16); 电枢(14)面对旋转磁体(16); 套筒(80)可旋转地支撑轴(203); 和固定电枢(14)和套筒(80)的底架(15)。 凸缘(201)和轴(203)与磁性材料一体形成; 在其上安装旋转磁体(16)的安装表面(204)和面向套筒的端表面的反面(205)之间不设置突起; 另外安装表面(204)和反面表面(205)与轴(203)的中心轴线(A-A')的方向垂直,并且在平面中; 或安装面(204)从对置面(205)朝向盘安装部(202)逐步凹陷。