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US 12,747,674 B2Granted
Turbocharger
AssigneeIHI Corporation
InventorsTakahiro Tanaka, Akihiro Ueda
Life of this patent
Estimating the term…
Abstract
A turbocharger includes a shaft, a rolling bearing that includes an inner ring and an outer ring, a housing that includes a bearing hole and a side wall intersecting the bearing hole, and a bearing retainer that is attached to the side wall and that faces a side face of the outer ring, a lower part of the bearing retainer including a small-radius area, a first distance from a central axis of the shaft to an outer edge of the small-radius area being shorter than a second distance from the central axis to the outer edge of other areas of the bearing retainer, the first distance of the small-radius area being larger than a radius of the bearing hole and less than or equal to a third distance from the central axis to an outer edge of an area facing the small-radius area in the side wall.
Claims12
A turbocharger comprising:
- a shaft;
- a rolling bearing that includes an inner ring mounted on the shaft and an outer ring arranged around the inner ring;
- a housing that includes a bearing hole accommodating the rolling bearing and a side wall intersecting the bearing hole;
- and
- a bearing retainer that is attached to the side wall and that faces a side face of the outer ring,
- a lower part of the bearing retainer including a small-radius area,
- a first distance from a central axis of the shaft to an outer edge of the small-radius area being shorter than a second distance from the central axis to the outer edge of other areas of the bearing retainer,
- the first distance of the small-radius area being greater than a radius of the bearing hole and less than or equal to a third distance from the central axis to an outer edge of an area facing the small-radius area in the side wall,
- wherein the outer edge of the small-radius area has a horizontal straight shape when seen in an axial direction of the shaft,
- the bearing retainer further includes a non-small-radius area that is an area other than the small-radius area,
- a radius from the central axis to an outer edge of the non-small-radius area is constant, and
- the outer edge of the small-radius area and the outer edge of the non-small-radius area are formed continuously.
9 more elements
A turbocharger comprising:
- a shaft;
- a rolling bearing that includes an inner ring mounted on the shaft and an outer ring arranged around the inner ring;
- a housing that includes a bearing hole accommodating the rolling bearing and a side wall intersecting the bearing hole;
- and
- a bearing retainer that is attached to the side wall and that faces a side face of the outer ring,
- a lower part of the bearing retainer including a small-radius area,
- a first distance from a central axis of the shaft to an outer edge of the small-radius area being shorter than a second distance from the central axis to the outer edge of other areas of the bearing retainer,
- the first distance of the small-radius area being greater than a radius of the bearing hole and less than or equal to a third distance from the central axis to an outer edge of an area facing the small-radius area in the side wall,
- wherein the bearing retainer further includes an oil drainage surface, a thickness of the bearing retainer at the oil drainage surface in an axial direction of the shaft is smaller than that of other areas of the bearing retainer, and the outer edge of the small-radius area is positioned within an outer edge of the oil drainage surface.
6 more elements
A turbocharger comprising:
- a shaft;
- a rolling bearing that includes an inner ring mounted on the shaft and an outer ring arranged around the inner ring;
- a housing that includes a bearing hole accommodating the rolling bearing and a side wall intersecting the bearing hole;
- and
- a bearing retainer that is attached to the side wall and that faces a side face of the outer ring,
- a lower part of the bearing retainer including a small-radius area,
- a first distance from a central axis of the shaft to an outer edge of the small-radius area being shorter than a second distance from the central axis to the outer edge of other areas of the bearing retainer,
- the first distance of the small-radius area being greater than a radius of the bearing hole and less than or equal to a third distance from the central axis to an outer edge of an area facing the small-radius area in the side wall,
- wherein
- the housing further includes:
- a groove having an arc shape that is greater than 180 degrees when seen in an axial direction of the shaft;
- and
- an oil drainage space that is formed below the groove, a distance from the central axis to an outer circumferential surface of the oil drainage space being larger than a distance from the central axis to an outer circumferential surface of the groove,
- the bearing retainer further includes a non-small-radius area that is an area other than the small-radius area,
- a part of the non-small-radius area is press-fitted into the groove, and
- the small-radius area and the rest of the non-small-radius area are exposed to the oil drainage space.
13 more elements
Dependencies are inferred from the claim text.