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    • 3. 发明授权
    • Motor including hydrodynamic bearing and disk drive apparatus including same
    • 包括流体动力轴承和包括其的磁盘驱动装置的电动机
    • US08508883B2
    • 2013-08-13
    • US13613106
    • 2012-09-13
    • Takehito TamaokaShuji IwasakiYoichi SekiiHideki Nishimura
    • Takehito TamaokaShuji IwasakiYoichi SekiiHideki Nishimura
    • G11B17/02H02K7/08
    • G11B19/2009F16C17/107F16C33/745F16C2370/12H02K5/1677
    • A motor includes a shaft portion, an upper plate cylindrical portion, a lower plate cylindrical portion, and a sleeve portion disposed between an upper plate portion and a lower plate portion. The sleeve portion includes an inner sleeve cylindrical portion and an outer sleeve cylindrical portion. An upper seal portion is arranged between the outer circumferential surface of the upper plate cylindrical portion and the inner circumferential surface of the outer sleeve cylindrical portion. A lower seal portion is arranged between the outer circumferential surface of the outer sleeve cylindrical portion and the inner circumferential surface of the lower plate cylindrical portion. At least a portion of the upper seal portion and at least a portion of the lower seal portion radially overlap with a radial gap between the outer circumferential surface of the shaft portion and the inner circumferential surface of the inner sleeve cylindrical portion.
    • 电动机包括轴部,上板圆筒部,下板圆筒部和设置在上板部和下板部之间的套筒部。 套筒部分包括内套筒部分和外套筒部分。 在上板圆筒部的外周面与外套筒筒部的内周面之间配置有上密封部。 在外筒筒部的外周面与下板圆筒部的内周面之间配置有下密封部。 上密封部分的至少一部分和下密封部分的至少一部分径向地与轴部的外圆周表面和内套筒圆筒部分的内圆周表面之间的径向间隙重叠。