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    • 16. 发明授权
    • Spindle motor including magnetic element for pre-loading a ball bearing set
    • 主轴电机包括用于预加载球轴承组的磁性元件
    • US06898052B1
    • 2005-05-24
    • US10741863
    • 2003-12-19
    • Kamran Oveyssi
    • Kamran Oveyssi
    • F16C25/08F16C39/06G11B17/02G11B19/20H02K7/08H02K7/09
    • G11B19/2009F16C25/086F16C2370/12H02K7/086H02K7/09
    • A spindle motor for use in a disk drive includes a spindle motor base and a motor shaft. The motor shaft has a central axis. The spindle motor includes a spindle motor hub rotatably coupled to the spindle motor base, the spindle motor hub including a central magnetic metal portion disposed adjacent a distal end of the motor shaft. The spindle motor includes a ball bearing set disposed between and in mechanical communication with the spindle motor hub and the motor shaft for rotatably coupling the spindle motor hub to the spindle motor base. The spindle motor includes a shaft magnetic element attached to the motor shaft at the distal end adjacent the central magnetic metal portion, the shaft magnetic element being sized and configured to apply an attractive magnetic force to the central magnetic metal portion in a direction along the central axis for pre-loading the ball bearing set.
    • 用于磁盘驱动器的主轴电动机包括主轴电动机底座和电动机轴。 电机轴具有中心轴。 主轴电动机包括可旋转地联接到主轴电动机基座的主轴电动机轮毂,主轴电动机毂包括邻近电动机轴的远端设置的中心磁性金属部分。 主轴电动机包括设置在主轴电动机轮毂和电动机轴之间并与主轴电动机轮毂和电动机轴机械连通的滚珠轴承组件,用于将主轴电机毂可旋转地联接到主轴电机底座。 所述主轴电动机包括轴磁性元件,所述轴磁元件在与所述中心磁性金属部分相邻的所述远端处附接到所述电动机轴,所述轴磁元件的尺寸和构造被设计成沿着所述中心的方向向所述中心磁性金属部分施加有吸引力的磁力 轴预加载球轴承组。
    • 17. 发明授权
    • Motor unit
    • 电机单元
    • US4701651A
    • 1987-10-20
    • US793267
    • 1985-10-31
    • Katsuhiko Tanaka
    • Katsuhiko Tanaka
    • F16C21/00H02K5/16H02K5/173H02K7/00H02K7/08H02K7/09
    • F16C25/086F16C21/00H02K7/086H02K21/24H02K7/09
    • A motor unit has a stationary member, a rotatable member rotatable relative to the stationary member, a stator provided on the stationary member, a rotor provided on the rotatable member, and at least two bearings disposed between the stationary member and the rotatable member. The rotor and stator are constructed so that the rotor is electromagnetically attracted toward the stator during the energization of the motor. One of the bearings is a ball bearing having an outer race with preload applied by the electromagnetic attraction of the rotor and an inner race formed on the rotatable member, and the other bearing is a hydrodynamic pressure type radial bearing.
    • 马达单元具有固定构件,相对于固定构件可旋转的可旋转构件,设置在固定构件上的定子,设置在可旋转构件上的转子以及设置在固定构件和可旋转构件之间的至少两个轴承。 转子和定子被构造成使得转子在电动机通电期间被电磁吸引到定子。 其中一个轴承是具有通过转子的电磁吸引力施加的预加载的外圈和形成在可旋转构件上的内座圈的滚珠轴承,另一个轴承是流体动力学压力型径向轴承。