| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor which can be visually checked on an amount of filling with a lubrication fluid. SOLUTION: A convex interfacial deformation part 86 is formed on the inner peripheral surface of an extension 46 of a rotary hub 40 which constitutes a lubrication fluid seal part 8. When the lubrication fluid 82 fills it up to a predetermined value, an interface 84 is positioned at the interfacial deformation part 86. Since the interfaces 842, 844 formed at the interfacial deformation part 86 are formed and deformed in comparison with the interface 840 formed at the part except for the interfacial deformation part 86, the height of the interface 84 can be visually checked, and the amount of the lubrication fluid 82 is easily controlled. COPYRIGHT: (C)2007,JPO&INPIT
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