发明申请
US20070140606A1 BEARING ASSEMBLY, MOTOR AND RECORDING DISK DRIVE 有权
轴承组件,电机和记录盘驱动器

  • 专利标题: BEARING ASSEMBLY, MOTOR AND RECORDING DISK DRIVE
  • 专利标题(中): 轴承组件,电机和记录盘驱动器
  • 申请号: US11613252
    申请日: 2006-12-20
  • 公开(公告)号: US20070140606A1
    公开(公告)日: 2007-06-21
  • 发明人: Ming FengSatoru Sodeoka
  • 申请人: Ming FengSatoru Sodeoka
  • 申请人地址: JP Kyoto 601-8205
  • 专利权人: NIDEC CORPORATION
  • 当前专利权人: NIDEC CORPORATION
  • 当前专利权人地址: JP Kyoto 601-8205
  • 优先权: JP2005-367382 20051221
  • 主分类号: F16C32/06
  • IPC分类号: F16C32/06
BEARING ASSEMBLY, MOTOR AND RECORDING DISK DRIVE
摘要:
A bearing assembly for use in an electric motor minimizes the generation of a negative pressure. In the bearing assembly, gaps are formed between a shaft provided with a flange portion, a ring member mounted on the shaft, and a sleeve member with a through hole formed therein are continuously filled with lubrication oil. When a rotor rotates, the rotor is supported by a fluid dynamic pressure. In the bearing assembly, herringbone grooves are formed in an upper surface of the flange portion of the shaft fixed to a base plate. When the sleeve member rotates with respect to the shaft, ends of all of the herringbone grooves and the through hole are superposed on each other sequentially. Thus, the lubrication oil can be efficiently supplied to an outer peripheral region in the thrust dynamic pressure bearing mechanism in which the negative pressure is most prone to be generated, and generation of the negative pressure can be efficiently minimized.
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