| 摘要 |
PROBLEM TO BE SOLVED: To reduce axial direction dimension of a bearing device and improve loading performance for moment load. SOLUTION: A cylindrical sleeve part 8 is fixed at an inner periphery of a housing 7 with its both ends opened and an axis member 2 is inserted in the inner periphery of the sleeve part 8. Sealing parts 9, 10 are fixed to the axis member 2 by sandwiching the sleeve part 8 from both sides in an axial direction and sealing spaces S1, S2 with an oil level of lubrication oil are formed between outer periphery surfaces 9a, 10a of the sealing parts 9, 10 and an inner periphery surfaces 7a of the housing 7. A radial bearing clearance is formed between an inner periphery surface 8a of the sleeve part 8 and the outer periphery surface 2a of the axis member 2 and a thrust bearing clearance is formed between end surfaces 9b, 10b of the sealing parts 9, 10 and end surfaces 8b, 8c of the sleeve part 8 opposite to them and the axis member 2 is supported in a radial direction and a thrust direction by dynamic pressure action of the lubrication oil generated at each bearing clearance in a noncontacting manner. COPYRIGHT: (C)2007,JPO&INPIT
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