发明名称 |
HYDRODYNAMIC BEARING DEVICE, MOTOR AND INFORMATION RECORDING AND REPRODUCING APPARATUS IN WHICH SAME IS USED, AND METHOD FOR MANUFACTURING SHAFT USED IN HYDRODYNAMIC BEARING DEVICE |
摘要 |
A hydrodynamic bearing device is provided for a spindle motor used in a hard disk drive or the like with a good state of fastening and good fastening strength between a shaft and a fixed member. The hydrodynamic bearing device includes a shaft that has a cylindrical main shaft portion and a fixing portion provided at one end of the main shaft portion, a sleeve that has a bearing hole in which the main shaft portion is inserted in a rotatable state, and a fixed member that is fixed to the fixing portion of the shaft. A nitride layer is formed on the main shaft portion, and a nitride layer non-forming film is formed on the fixing portion.
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申请公布号 |
US2009108691(A1) |
申请公布日期 |
2009.04.30 |
申请号 |
US20080259550 |
申请日期 |
2008.10.28 |
申请人 |
YOSHIKAWA SHOICHI |
发明人 |
YOSHIKAWA SHOICHI |
分类号 |
H02K5/16;B21D53/10;F16C32/06 |
主分类号 |
H02K5/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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