发明申请
- 专利标题: DISK DRIVE DEVICE IMPROVED IN ANTI-VIBRATION CHARACTERISTIC
- 专利标题(中): 改进了抗振动特性的磁盘驱动装置
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申请号: US12838375申请日: 2010-07-16
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公开(公告)号: US20110033143A1公开(公告)日: 2011-02-10
- 发明人: Takuji Yamada , Mitsuo Kodama
- 申请人: Takuji Yamada , Mitsuo Kodama
- 申请人地址: JP Shizuoka
- 专利权人: ALPHANA TECHNOLOGY CO., LTD.
- 当前专利权人: ALPHANA TECHNOLOGY CO., LTD.
- 当前专利权人地址: JP Shizuoka
- 优先权: JP2009-181545 20090804
- 主分类号: F16C32/06
- IPC分类号: F16C32/06 ; G11B25/00
摘要:
A disk drive device includes a rotating body, a fluid dynamic bearing unit that rotatably supports the rotating body, and a drive unit. The fluid dynamic bearing unit has: a lubricant holding portion in which lubricant is held; a first thrust dynamic pressure groove with which a first thrust dynamic pressure generating portion for generating the dynamic pressure in the pump-in direction, which is oriented toward the inside of the lubricant holding portion, is structured; and a second thrust dynamic pressure groove with which a second thrust dynamic pressure generating portion for generating at least the dynamic pressure in the pump-out direction, is structured. The first thrust dynamic pressure generating portion and the second thrust dynamic pressure generating portion have dynamic pressure generation characteristics in which, when the rotating body is biased in the rotational axis direction from the state where the rotating body is floating in the lubricant, the sum of the changes in the dynamic pressure in the pump-out direction is larger than that of the changes in the dynamic pressure in the pump-in direction.
公开/授权文献
- US08506168B2 Disk drive device improved in anti-vibration characteristic 公开/授权日:2013-08-13