发明申请
US20090060403A1 SLEEVE FOR HYDRODYNAMIC BEARING DEVICE, HYDRODYNAMIC BEARING DEVICE EQUIPPED WITH SAME, SPINDLE MOTOR, INFORMATION PROCESSING APPARATUS, AND METHOD FOR MANUFACTURING SLEEVE FOR HYDRODYNAMIC BEARING DEVICE
审中-公开
用于水动力轴承装置的套筒，具有相同装置的水动力轴承装置，主轴电机，信息处理装置以及用于制造用于水动力轴承装置的套筒的方法
- 专利标题： SLEEVE FOR HYDRODYNAMIC BEARING DEVICE, HYDRODYNAMIC BEARING DEVICE EQUIPPED WITH SAME, SPINDLE MOTOR, INFORMATION PROCESSING APPARATUS, AND METHOD FOR MANUFACTURING SLEEVE FOR HYDRODYNAMIC BEARING DEVICE
- 专利标题（中）： 用于水动力轴承装置的套筒，具有相同装置的水动力轴承装置，主轴电机，信息处理装置以及用于制造用于水动力轴承装置的套筒的方法
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申请号： US12187689申请日： 2008-08-07
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公开(公告)号： US20090060403A1公开(公告)日： 2009-03-05
- 发明人: Tsutomu HAMADA , Katsuo ISHIKAWA , Takafumi ASADA
- 申请人： Tsutomu HAMADA , Katsuo ISHIKAWA , Takafumi ASADA
- 优先权： JP2007-224587 20070830
- 主分类号： F16C32/06
- IPC分类号： F16C32/06
摘要：
A sleeve for a hydrodynamic bearing device, a hydrodynamic bearing device equipped with the sleeve, a spindle motor, information recording and reproducing and processing apparatus, and a method for manufacturing a sleeve for a hydrodynamic bearing device are provided that are capable of reducing costs through appropriate sealing treatment.The sleeve for a hydrodynamic bearing device has an inner layer and a surface layer. The inner layer is formed by sintering metal powder for sintering use. The surface layer is formed on a surface of the inner layer and includes diiron trioxide (Fe2O3). Sealing treatment is carried out by forming a surface layer including diiron trioxide (Fe2O3) on a surface of a sleeve for a hydrodynamic bearing device that is porous.
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