Invention Grant
US08013487B2 Hydrodynamic bearing device, and spindle motor and information apparatus equipped with same
有权
流体动力轴承装置，以及主轴电机和配备有其的信息装置
- Patent Title: Hydrodynamic bearing device, and spindle motor and information apparatus equipped with same
- Patent Title (中): 流体动力轴承装置，以及主轴电机和配备有其的信息装置
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Application No.: US12552632Application Date: 2009-09-02
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Publication No.: US08013487B2Publication Date: 2011-09-06
- Inventor: Koji Hirata , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
- Applicant: Koji Hirata , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2008-249158 20080926
- Main IPC: H02K5/167
- IPC: H02K5/167 ; F16C32/06
Abstract:
With a hydrodynamic bearing device 10, a first gap G1 is formed between a shaft 12 and a sleeve 11. A second gap G2 is formed between a sleeve cap 16 and the sleeve 11, and holds a lubricant 17. A thrust bearing member 21 is disposed near the inner peripheral surface of a center hole 16a of the sleeve cap 16. A third gap G3 is formed between the thrust bearing member 21 and the sleeve cap 16, and is open to the atmosphere. A fourth gap G4 is formed between the thrust bearing member 21 and the sleeve 11. The lubricant 17 circulates along a circulation passage that includes a communicating path 11b, the first gap G1 and the second gap G2.
Public/Granted literature
- US20100079022A1 HYDRODYNAMIC BEARING DEVICE, AND SPINDLE MOTOR AND INFORMATION APPARATUS EQUIPPED WITH SAME Public/Granted day:2010-04-01
Information query
