发明名称 |
Hydrodynamic bearing, method of manufacturing the same, method of manufacturing shaft member for hydrodynamic bearing, spindle motor, and recording disk driving apparatus |
摘要 |
According to the invention, a shaft as a component of a shaft member of a hydrodynamic bearing and a disc member such as a thrust plate are joined to each other by welding by a simple method with high precision. A shaft having a cylindrical outer circumferential surface, in joint surfaces which are joined to each other of the shaft and a disc member having a flat surface facing an end surface of the shaft, a circumferential projection having a diameter smaller than the outside diameter of the shaft and projected in the axial direction and a recess at least of which outer periphery has a diameter smaller than the outside diameter of the shaft and larger than the diameter of the projection and has a circular shape are provided.
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申请公布号 |
US7128468(B2) |
申请公布日期 |
2006.10.31 |
申请号 |
US20040829332 |
申请日期 |
2004.04.22 |
申请人 |
NIDEC CORPORATION |
发明人 |
SUMI SHIGEHARU;OHIRO TAKESHI;YOSHIDA TATSUYA |
分类号 |
F16C17/10;F16C33/14;F16C17/04;F16C33/10;G11B19/20 |
主分类号 |
F16C17/10 |
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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