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    • 6. 发明专利
    • Spindle motor and disk driving device
    • 主轴电机和磁盘驱动器件
    • JP2012196115A
    • 2012-10-11
    • JP2011107625
    • 2011-05-12
    • Nippon Densan Corp日本電産株式会社
    • MIZUKAMI JUNYAOE TAKAYUKISEKII YOICHISAHASHI NAOKINISHIMURA HIDEKITAMAOKA TAKETOYAMAMOTO TAKASHI
    • H02K7/08F16C17/10F16C33/10F16C33/74G11B19/20
    • H02K7/085F16C17/105F16C17/107F16C33/745F16C2370/12G11B19/2036G11B33/1473
    • PROBLEM TO BE SOLVED: To provide a motor capable of reducing a pressure difference between upper and lower sealing parts to prevent lubrication oil from being leaked with ease.SOLUTION: In a motor, a dynamic pressure bearing is configured in a first gap between a shaft part 41 and a sleeve part 5, and an upper sealing part extending upward and a lower sealing part extending downward are configured to radial direction outside the dynamic pressure bearing. Interfaces of lubrication oil locate to the upper sealing part and the lower sealing part respectively. The upper sealing part and the lower sealing part are communicated with each other via a communication hole 61. A region from the upper sealing part to the lower sealing part via the first gap, and the communication hole 61 are filled with the lubrication oil 45. A distance in an axial direction between the interface of the upper sealing part and the interface of the lower sealing part is smaller than a distance in the axial direction between an upper end and a lower end of the dynamic pressure bearing.
    • 要解决的问题:提供一种能够减小上部和下部密封部分之间的压力差的电动机,以防止润滑油容易泄漏。 解决方案:在电动机中,动压轴承构造在轴部41和套筒部5之间的第一间隙中,并且向上延伸的上密封部和向下延伸的下密封部配置成向径向外侧 动压轴承。 润滑油的接口分别位于上密封部分和下密封部分。 上密封部和下密封部经由连通孔61相互连通。经由第一间隙从上密封部到下密封部的区域,连通孔61填充有润滑油45。 在上密封部的界面与下密封部的界面之间的轴向距离小于动压轴承的上端和下端之间的轴向距离。 版权所有(C)2013,JPO&INPIT
    • 7. 发明专利
    • Spindle motor and disk drive
    • 主轴电机和磁盘驱动器
    • JP2012193838A
    • 2012-10-11
    • JP2011107627
    • 2011-05-12
    • Nippon Densan Corp日本電産株式会社
    • MIZUKAMI JUNYAOE TAKAYUKISEKII YOICHISAHASHI NAOKINISHIMURA HIDEKITAMAOKA TAKETOYAMAMOTO TAKASHI
    • F16C33/74F16C17/10F16C35/02H02K7/08
    • H02K7/085F16C17/107F16C33/745F16C2370/12G11B25/043G11B33/1473
    • PROBLEM TO BE SOLVED: To reduce pressure difference between an upper seal and a lower seal and easily prevent leakage of a lubricating oil.SOLUTION: A stationary part of a motor includes a shaft 41 disposed with a center shaft J1 directed toward the vertical direction as the center, a lower plate 431 expanded from the lower part of the shaft to the radial outside, an outer tube 432 extended upward from the outer edge of the lower plate, and a base 21 to which the outer circumference of the outer tube is fixed. The rotation part has a sleeve 5 opposed to the outer circumferential surface of the shaft. The sleeve has a communicating hole 61. A dynamic pressure bearing is constituted in a first gap 62 between the shaft and the sleeve. The upper seal and the lower seal are constituted radially outward of the dynamic pressure bearing. The upper seal is communicated with the lower seal through the communicating hole 61. The communicating hole and an area extending to the lower seal from the upper seal through the first gap 62 are filled with a lubricating oil. A fixing area with the outer tube and the base is overlapped with the dynamic pressure bearing in the radial direction.
    • 要解决的问题:为了减少上部密封件和下部密封件之间的压力差,并且容易防止润滑油泄漏。 解决方案:电动机的固定部分包括:轴41,其设置有以垂直方向为中心的中心轴J1,从轴的下部向径向外侧膨胀的下板431;外管 432从下板的外边缘向上延伸,外管的外周固定到基座21。 旋转部具有与轴的外周面相对的套筒5。 套筒具有连通孔61.在轴和套筒之间的第一间隙62中构成动压轴承。 上密封件和下密封件构成动压轴承的径向外侧。 上密封件通过连通孔61与下密封件连通。连通孔和从上密封件通过第一间隙62延伸到下密封件的区域填充有润滑油。 具有外管和基座的固定区域与动压轴承在径向方向重叠。 版权所有(C)2013,JPO&INPIT