Rolling bearing device and turbocharger incorporating same
First Claim
1. A rolling bearing device comprising:
- a bearing housing adapted to be supported on a casing of an apparatus having a rotation shaft; and
a pair of rolling bearings adapted to be mounted within the bearing housing to rotatably support the rotation shaft;
wherein a middle position between said pair of rolling bearings in an axial direction and a central portion of said bearing housing in the axial direction are offset from each other in the axial direction; and
each of said rolling bearings includes an inner ring having a first raceway formed at an outer periphery thereof, an outer ring having a second raceway formed at an inner periphery thereof, and at least one intermediate ring which is interposed between said inner and outer rings, and has a third raceway formed at an inner periphery thereof and also has a fourth raceway formed at an outer periphery thereof, a row of rolling elements rollably interposed between said third raceway of said intermediate ring and said first raceway of said inner ring, and a row of rolling elements rollably interposed between said fourth raceway of said intermediate ring and said second raceway of said outer ring; and
said intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of said rotation shaft.
2 Assignments
0 Petitions
Accused Products
Abstract
A rolling bearing device includes a bearing housing supported on a casing of a turbocharger, and a pair of rolling bearings mounted within the bearing housing and rotatably supporting a turbine shaft. A middle position between the pair of rolling bearings in an axial direction and a central portion of the bearing housing in the axial direction are offset from each other in the axial direction. Each of the rolling bearings includes an inner ring, an outer ring, an intermediate ring interposed between the inner and outer rings, a row of rolling elements rollably interposed between the inner ring and the intermediate ring, and a row of rolling elements rollably interposed between the intermediate ring and the outer ring. The intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of the turbine shaft.
39 Citations
4 Claims
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1. A rolling bearing device comprising:
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a bearing housing adapted to be supported on a casing of an apparatus having a rotation shaft; and a pair of rolling bearings adapted to be mounted within the bearing housing to rotatably support the rotation shaft; wherein a middle position between said pair of rolling bearings in an axial direction and a central portion of said bearing housing in the axial direction are offset from each other in the axial direction; and each of said rolling bearings includes an inner ring having a first raceway formed at an outer periphery thereof, an outer ring having a second raceway formed at an inner periphery thereof, and at least one intermediate ring which is interposed between said inner and outer rings, and has a third raceway formed at an inner periphery thereof and also has a fourth raceway formed at an outer periphery thereof, a row of rolling elements rollably interposed between said third raceway of said intermediate ring and said first raceway of said inner ring, and a row of rolling elements rollably interposed between said fourth raceway of said intermediate ring and said second raceway of said outer ring; and said intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of said rotation shaft. - View Dependent Claims (2, 3, 4)
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Specification