| 摘要 |
PROBLEM TO BE SOLVED: To enable oil to be certainly prevented from leaking over the long haul to improve reliability and endurance. SOLUTION: A dividing wall 1C equipped with a bearing housing section 1D is provided between a casing 1 and a motor case 11. A bearing 15 for rotatably supporting a driving shaft 13 is provided in the bearing housing section 1D. Further, a party wall 1E is provided in one side of the axial direction of the bearing housing section 1D. Furthermore, between the party wall 1E and the driving 13, a visco seal 26 is provided which effects a pumping action toward an inside of the casing 1. Moreover, a communicating hole 27 is provided which makes a portion between a space S between the party wall 1E and the bearing 15 and the inside of the casing 1 communicate with each other. As a result, even if the space S tends to be negative in pressure by the visco seal 26, air inside the casing 1 can be supplied via the communicating hole 27. COPYRIGHT: (C)2009,JPO&INPIT
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