Bearing device and AC generator for vehicles using the same
First Claim
1. An AC generator for a vehicle, comprising:
- a housing;
first and second bearings held by the housing;
a stator disposed in the housing;
a rotor operatively coupled to the stator, and having a rotation shaft that is rotatably supported by the first and second bearings; and
a multiple-helical wave washer disposed to apply a pre-load to at least one of outer rings of the first and second bearings.
1 Assignment
0 Petitions
Accused Products
Abstract
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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Citations
19 Claims
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1. An AC generator for a vehicle, comprising:
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a housing;
first and second bearings held by the housing;
a stator disposed in the housing;
a rotor operatively coupled to the stator, and having a rotation shaft that is rotatably supported by the first and second bearings; and
a multiple-helical wave washer disposed to apply a pre-load to at least one of outer rings of the first and second bearings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A bearing device comprising:
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first and second bearings for rotatably supporting a shaft at two end portions of the rotation shaft;
first and second bearing housings for holding the first and second bearings, respectively; and
a multiple-helical wave washer disposed to apply a pre-load to at least one of outer rings of the first and second bearings. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification