Invention Grant
US08169738B1 Fluid dynamic bearing mechanism including communicating channel, spindle motor, and disk drive apparatus
有权
流体动力轴承机构包括连通通道，主轴电机和磁盘驱动装置
- Patent Title: Fluid dynamic bearing mechanism including communicating channel, spindle motor, and disk drive apparatus
- Patent Title (中): 流体动力轴承机构包括连通通道，主轴电机和磁盘驱动装置
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Application No.: US13034778Application Date: 2011-02-25
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Publication No.: US08169738B1Publication Date: 2012-05-01
- Inventor: Atsushi Yawata , Yoichi Sekii , Junya Mizukami , Tetsuya Maruyama , Hirofumi Kojima
- Applicant: Atsushi Yawata , Yoichi Sekii , Junya Mizukami , Tetsuya Maruyama , Hirofumi Kojima
- Applicant Address: JP Kyoto
- Assignee: Nidec Corporation
- Current Assignee: Nidec Corporation
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2010-234494 20101019
- Main IPC: G11B19/20
- IPC: G11B19/20
Abstract:
A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array.
Public/Granted literature
- US20120092788A1 FLUID DYNAMIC BEARING MECHANISM INCLUDING COMMUNICATING CHANNEL, SPINDLE MOTOR, AND DISK DRIVE APPARATUS Public/Granted day:2012-04-19
Information query
IPC分类:
