发明申请
US20110019303A1 FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS
审中-公开
流体动力轴承装置，主轴电机和磁盘驱动装置
- 专利标题： FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS
- 专利标题（中）： 流体动力轴承装置，主轴电机和磁盘驱动装置
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申请号： US12899658申请日： 2010-10-07
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公开(公告)号： US20110019303A1公开(公告)日： 2011-01-27
- 发明人: Hiroki YAMADA , Junya MIZUKAMI , Tsuyoshi MORITA , Tetsuya MARUYAMA , Takuro IGUCHI
- 申请人： Hiroki YAMADA , Junya MIZUKAMI , Tsuyoshi MORITA , Tetsuya MARUYAMA , Takuro IGUCHI
- 申请人地址： JP Kyoto
- 专利权人： NIDEC CORPORATION
- 当前专利权人： NIDEC CORPORATION
- 当前专利权人地址： JP Kyoto
- 优先权： JP2008-136648 20080526; JP2009-115505 20090512; JP2009-254640 20091106
- 主分类号： G11B5/02
- IPC分类号： G11B5/02 ; F16C32/06 ; H02K5/167
摘要：
In a spindle motor, a capillary seal portion having a radial dimension that decreases in an axially downward direction, and a labyrinth seal portion arranged above the capillary seal portion are defined between an outer circumferential surface of a rotating member and an inner circumferential surface of a tubular portion. The capillary seal portion includes a liquid surface of a lubricating oil positioned therewithin. The radial dimension of the labyrinth seal portion is smaller than the radial dimension of an upper end portion of the capillary seal portion, so that the labyrinth seal portion contributes to reducing evaporation of the lubricating oil.