Invention Grant
- Patent Title: Spindle motor with fluid dynamic bearing and storage disk drive
- Patent Title (中): 主轴电机带流体动力轴承和存储磁盘驱动器
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Application No.: US13198787Application Date: 2011-08-05
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Publication No.: US08823230B2Publication Date: 2014-09-02
- Inventor: Junya Mizukami , Takayuki Oe , Yoichi Sekii , Naoki Sabashi , Hideki Nishimura , Takehito Tamaoka , Takashi Yamamoto
- Applicant: Junya Mizukami , Takayuki Oe , Yoichi Sekii , Naoki Sabashi , Hideki Nishimura , Takehito Tamaoka , Takashi Yamamoto
- Applicant Address: JP Kyoto
- Assignee: Nidec Corporation
- Current Assignee: Nidec Corporation
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2010-178965 20100809; JP2011-046787 20110303; JP2011-107627 20110512
- Main IPC: H02K5/167
- IPC: H02K5/167 ; G11B33/14 ; G11B25/04 ; H02K7/08
Abstract:
A motor includes a stationary portion and a rotating portion. The rotating portion includes a sleeve portion. The sleeve portion includes a communicating hole. A dynamic pressure bearing is defined in a first gap between a shaft portion and the sleeve portion. An upper seal portion and a lower seal portion are arranged radially outward of the dynamic pressure bearing. The upper seal portion and the lower seal portion are arranged in communication with each other through the communicating hole. The communicating hole and a space extending from the upper seal portion to the lower seal portion through the first gap are filled with a lubricating oil. A fixing region where an outer tubular portion and a base portion are fixed to each other is arranged to overlap with the dynamic pressure bearing in a radial direction in plan view.
Public/Granted literature
- US20120033327A1 SPINDLE MOTOR AND STORAGE DISK DRIVE Public/Granted day:2012-02-09
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