| 摘要 |
An AC generator for a vehicle includes front and rear bearings held by a housing, a stator disposed in the housing, a rotor having a rotation shaft rotatably supported by the front and rear bearings, and a multiple-helical wave washer disposed to apply a pre-load to at least one of outer rings of the front and rear bearings. The housing includes a front frame that has a front bearing box for holding the front bearing, and a rear frame that has a rear bearing box for holding the rear bearing, and the stator is disposed between the front frame and the rear frame. In addition, the multiple-helical wave washer can contact the outer ring of the rear bearing and a side wall of the rear bearing box. Accordingly, creep resistance of the rear bearing is improved within an allowable pre-load range.
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