Invention Grant
US08743505B2 Fluid dynamic bearing apparatus with specific minute gap structure with spindle motor and disk drive apparatus including same
有权
具有特定微小间隙结构的流体动力轴承装置，包括主轴电机和包括其的磁盘驱动装置
- Patent Title: Fluid dynamic bearing apparatus with specific minute gap structure with spindle motor and disk drive apparatus including same
- Patent Title (中): 具有特定微小间隙结构的流体动力轴承装置，包括主轴电机和包括其的磁盘驱动装置
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Application No.: US13893535Application Date: 2013-05-14
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Publication No.: US08743505B2Publication Date: 2014-06-03
- Inventor: Hiroki Yamada , Junya Mizukami , Tsuyoshi Morita , Tetsuya Maruyama , Takuro Iguchi , Troy Michael Herndon , Timothy Edward Langlais
- Applicant: Nidec Corporation , Seagate Technology LLC
- Applicant Address: JP Kyoto US CA Cupertino
- Assignee: Nidec Corporation,Seagate Technology LLC
- Current Assignee: Nidec Corporation,Seagate Technology LLC
- Current Assignee Address: JP Kyoto US CA Cupertino
- Agency: Keating & Bennett, LLP
- Priority: JP2008-136648 20080526; JP2009-115505 20090512
- Main IPC: G11B17/02
- IPC: G11B17/02 ; H02K7/08
Abstract:
A fluid dynamic bearing apparatus includes a first minute gap, a second minute gap, a third minute gap, a fourth minute gap, and a fifth minute gap. A flow of a lubricating oil from the fifth minute gap to the fourth minute gap is caused by a plurality of dynamic pressure generating grooves arranged within the fluid dynamic bearing apparatus. This flow causes air bubbles mixed in the lubricating oil within the fifth minute gap to flow toward the third minute gap and be discharged to an outside of the fluid dynamic bearing apparatus through the third minute gap. The fluid dynamic bearing apparatus further includes a plurality of dynamic pressure generating grooves and an annular groove.
Public/Granted literature
- US20130243356A1 FLUID DYNAMIC BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS Public/Granted day:2013-09-19
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