| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that an oil interposed in a fine gap of a dynamic pressure bearing is leaked out and a desired characteristic cannot be obtained in the case where the oil having a low viscosity is generally used as the oil of the dynamic pressure bearing, particularly in the case where the dynamic pressure bearing is used in an inclineded condition. SOLUTION: In the dynamic pressure bearing, a dynamic pressure generation groove is formed on at least one of an inner diameter of a bearing sleeve or an outer diameter of a bearing shaft and the bearing sleeve and the bearing shaft are opposed to each other with a fine gap. Axial load is supported by a pumping action by a relative motion of the bearing sleeve and the bearing shaft. A liquid having a large thixotropic property is interposed in the fine gap.
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