# US 2019/0170191 A1 · Bearing housing and rolling bearing device

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- Number: US 2019/0170191 A1
- Document ID: US20190170191A1
- Status: Published application
- Kind: A1
- Application number: 16/202,835
- Filed: 2018-11-28
- Published: 2019-06-06
- Earliest claimed: 2017-12-05
- Assignees: Jtekt Corporation
- Applicants: Jtekt Corporation
- Inventors: Kousuke YAMADA; Jun MATSUNAMI; Kazuma OKADA; Kazuhiro KIMURA
- Web page: https://patentgrep.com/patent/US20190170191A1

## CPC

- F16C 33/3887: {Details of individual pockets, e.g. shape or ball retaining means}
- F16C 19/06: with a single row or balls
- F16C 19/08: with two or more rows of balls
- F16C 19/548: {in O-arrangement}
- F16C 35/061: {mounting a plurality of bearings side by side}
- F16C 35/067: Fixing them in a housing (with interposition of an element F16C35/07)
- F16C 2226/74: with snap-fit, e.g. by clips
- F16C 2226/76: with tongue and groove or key and slot
- F16C 2380/16: X-ray tubes
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A bearing housing in which a rolling bearing is built includes a cylindrical inner circumferential surface and an end face formed continuously with an axial end of the inner circumferential surface in an orientation perpendicular to a central axis of the inner circumferential surface. The inner circumferential surface has an annular groove that is radially outwardly recessed around an entire circumference of the inner circumferential surface. A snap ring is attached into the annular groove to reduce displacement of the rolling bearing. A recess recessed in an axial direction and extending in a radial direction is provided in the end face of the bearing housing.

## Claims

### Claim 1

A bearing housing comprising:
a cylindrical inner circumferential surface having an inner side, on which an outer ring of a rolling bearing is fitted into the inner circumferential surface coaxially with the inner circumferential surface; and
an end face formed continuously with an axial end of the inner circumferential surface in an orientation perpendicular to a central axis of the inner circumferential surface, wherein
the inner circumferential surface has an annular groove radially outwardly recessed around an entire circumference of the inner circumferential surface at a position away from the end face in an axial direction on a side of the end face relative to the rolling bearing,
a snap ring is attached into the annular groove to reduce displacement of the rolling bearing toward the end face, and
a recess recessed in the axial direction and extending in a radial direction is provided in the end face to suppress interference between the end face and a setting tool for use in attaching the snap ring.

### Claim 2 (depends on 1)

The bearing housing according to claim 1, wherein a width of the recess is larger than a width of a portion of the setting tool which corresponds to the recess when the setting tool is used to attach the snap ring.

### Claim 3 (depends on 2)

The bearing housing according to claim 2, wherein a distance in the axial direction from the end face to a bottom face of the recess is larger than a length in the axial direction between the end face and one side face of a pair of side faces formed in the radial direction to define the annular groove, the one side face being on a side of the end face relative to the other one of the side faces, and the recess and the annular groove communicate with each other.

### Claim 4 (depends on 1)

A rolling bearing device comprising:
the bearing housing according to claim 1; and
a rotary shaft mounted to the bearing housing coaxially with the bearing housing and radially inside the bearing housing and rotatably supported by the rolling bearing, wherein
the rotary shaft includes a shaft portion supported inside the bearing housing by the rolling bearing and a flange portion formed at a shaft end of the shaft portion in one piece with the shaft portion, and
the flange portion is of such a size that the flange portion axially faces at least a part of the snap ring.

### Claim 5 (depends on 2)

A rolling bearing device comprising:
the bearing housing according to claim 2; and
a rotary shaft mounted to the bearing housing coaxially with the bearing housing and radially inside the bearing housing and rotatably supported by the rolling bearing, wherein
the rotary shaft includes a shaft portion supported inside the bearing housing by the rolling bearing and a flange portion formed at a shaft end of the shaft portion in one piece with the shaft portion, and
the flange portion is of such a size that the flange portion axially faces at least a part of the snap ring.

### Claim 6 (depends on 3)

A rolling bearing device comprising:
the bearing housing according to claim 3; and
a rotary shaft mounted to the bearing housing coaxially with the bearing housing and radially inside the bearing housing and rotatably supported by the rolling bearing, wherein
the rotary shaft includes a shaft portion supported inside the bearing housing by the rolling bearing and a flange portion formed at a shaft end of the shaft portion in one piece with the shaft portion, and
the flange portion is of such a size that the flange portion axially faces at least a part of the snap ring.