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    • 2. 发明授权
    • Spindle motor and disk drive device using the same
    • 主轴电机和磁盘驱动装置使用相同
    • US07663280B2
    • 2010-02-16
    • US11912948
    • 2006-05-19
    • Kenichi MiyamoriShigeo ObataHiromitsu NodaHiromi Kita
    • Kenichi MiyamoriShigeo ObataHiromitsu NodaHiromi Kita
    • H02K7/08H02K7/00
    • G11B33/12G11B19/2009G11B33/123H02K7/085
    • A spindle motor and a disk drive device are provided that have 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 a rotor hub (20) composed of a disk-like flange (201) and a cylinder-shaped shaft (203); a ring-shaped rotating magnet (16) fastened on one main surface of the flange (201); an armature (14) facing the rotating magnet (16); a sleeve (80) rotatably supporting the shaft (203); and a chassis (15) fixing the armature (14) and the sleeve (80). The flange (201) and the shaft (203) are integrally formed with magnetic material; a protrusion is not provided between a mounting surface (204) for mounting the rotating magnet (16) thereon and a counter-face surface (205) facing the end surface of the sleeve; and the mounting surface (204) and the counter-face surface (205) are orthogonal to the direction of the central axis (A-A′) of the shaft (203), and in a level plane; or the mounting surface (204) is recessed stepwise from the counter-face surface (205) toward the disk mounting portion (202).
    • 提供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,不会泄漏油,并且通过减小旋转轴线方向上的跳动分量而具有改进的稳定性。 主轴电动机包括由盘状凸缘(201)和圆筒形轴(203)构成的转子轮毂(20)。 固定在凸缘(201)的一个主表面上的环形旋转磁体(16); 面向所述旋转磁体的电枢(14); 可旋转地支撑所述轴(203)的套筒(80); 以及固定所述电枢(14)和所述套筒(80)的底座(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相对表面(205)之间没有设置突起; 并且所述安装面(204)和所述反面面(205)与所述轴(203)的中心轴线(A-A')的方向正交,并且在平面内; 或者安装面(204)从对置面(205)向盘安装部(202)逐步凹陷。