Invention Grant
US08508883B2 Motor including hydrodynamic bearing and disk drive apparatus including same
有权
包括流体动力轴承和包括其的磁盘驱动装置的电动机
- Patent Title: Motor including hydrodynamic bearing and disk drive apparatus including same
- Patent Title (中): 包括流体动力轴承和包括其的磁盘驱动装置的电动机
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Application No.: US13613106Application Date: 2012-09-13
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Publication No.: US08508883B2Publication Date: 2013-08-13
- Inventor: Takehito Tamaoka , Shuji Iwasaki , Yoichi Sekii , Hideki Nishimura
- Applicant: Takehito Tamaoka , Shuji Iwasaki , Yoichi Sekii , Hideki Nishimura
- Applicant Address: JP Kyoto
- Assignee: Nidec Corporation
- Current Assignee: Nidec Corporation
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, PLLC
- Priority: JP2011-218230 20110930; JP2012-129863 20120607
- Main IPC: G11B17/02
- IPC: G11B17/02 ; H02K7/08
Abstract:
A motor includes a shaft portion, an upper plate cylindrical portion, a lower plate cylindrical portion, and a sleeve portion disposed between an upper plate portion and a lower plate portion. The sleeve portion includes an inner sleeve cylindrical portion and an outer sleeve cylindrical portion. An upper seal portion is arranged between the outer circumferential surface of the upper plate cylindrical portion and the inner circumferential surface of the outer sleeve cylindrical portion. A lower seal portion is arranged between the outer circumferential surface of the outer sleeve cylindrical portion and the inner circumferential surface of the lower plate cylindrical portion. At least a portion of the upper seal portion and at least a portion of the lower seal portion radially overlap with a radial gap between the outer circumferential surface of the shaft portion and the inner circumferential surface of the inner sleeve cylindrical portion.
Public/Granted literature
- US20130083426A1 MOTOR AND DISK DRIVE APPARATUS Public/Granted day:2013-04-04
Information query
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