FLUID DYNAMIC PRESSURE BEARING DEVICE, SPINDLE MOTOR AND DISK DRIVE APPARATUS
    2.
    发明申请
    FLUID DYNAMIC PRESSURE BEARING DEVICE, SPINDLE MOTOR AND DISK DRIVE APPARATUS 有权
    流体动力压力轴承装置,主轴电机和磁盘驱动装置

    公开(公告)号:US20100195250A1

    公开(公告)日:2010-08-05

    申请号:US12765122

    申请日:2010-04-22

    IPC分类号: G11B5/60 F16C32/06

    摘要: A bearing mechanism includes a shaft, a sleeve portion, a thrust portion, and a cover portion. Lubricating oil is arranged in a communicating channel in the sleeve portion, a thrust gap between the sleeve portion and the thrust portion, and a tapered gap between an outside surface of the thrust portion and the cover portion. A lower end opening of the communicating channel is defined in an outer circumferential portion of a lower surface of the sleeve portion radially outward of the thrust gap. A radially outermost portion of the thrust portion is arranged either tangent to a wall surface of the communicating channel or closer to a central axis than the wall surface. The tapered gap is arranged closer to the central axis than a radially outermost point of the wall surface. The outer circumferential portion and the cover portion define a guide gap therebetween.

    摘要翻译: 轴承机构包括轴,套筒部分,推力部分和盖部分。 润滑油布置在套筒部分的连通通道中,套筒部分和推力部分之间的推力间隙以及推力部分的外表面与盖部分之间的锥形间隙。 连通通道的下端开口被限定在径向向外推动间隙的套筒部分的下表面的外圆周部分中。 推力部分的径向最外部分布置成与连通通道的壁表面相切或者比壁表面更靠近中心轴线。 锥形间隙布置成比壁表面的径向最外侧更靠近中心轴线。 外周部和盖部在其间限定引导间隙。