# US 8,770,853 B2 · Split cage for rolling bearing

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- Number: US 8,770,853 B2
- Document ID: US8770853B2
- Status: Granted
- Kind: B2
- Application number: 13/896,682
- Filed: 2013-05-17
- Published: 2013-11-21
- Granted: 2014-07-08
- Earliest claimed: 2012-05-18
- Assignees: Jtekt Corporation
- Applicants: JTEKT Corporation
- Inventors: Takeshi Miyachi
- Web page: https://patentgrep.com/patent/US8770853B2

## CPC

- F16C 33/50: formed of interconnected members, e.g. chains
- F16C 33/4605: {Details of interaction of cage and race, e.g. retention or centring}
- F16C 33/4635: {made from plastic, e.g. injection moulded window cages}
- F16C 33/513: {formed of arcuate segments for carrying one or more rollers}
- F16C 19/364: {with tapered rollers, i.e. rollers having essentially the shape of a truncated cone}
- F16C 33/6629: {Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements}
- F16C 33/6681: {Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements}
- F16C 2300/14: Large applications, e.g. bearings having an inner diameter exceeding 500 mm
- F16C 2360/31: Wind motors
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A split cage for a rolling bearing includes a plurality of cage segments formed of synthetic resin and arranged annularly in a circumferential direction. Each cage segment includes: a first rim portion and a second rim portion that are spaced from each other by a predetermined interval and face each other; and a plurality of bar portions extending from the first rim portion to the second rim portion. Spaces, each of which is surrounded by the bar portions adjacent to each other and the first and second rim portions, are formed as pockets that house rolling elements. Projections for reinforcement are formed at radial end portions of boundaries between the bar portions and the first rim portion and/or boundaries between the bar portions and the second rim portion.

## Claims

### Claim 1

A split cage for a rolling bearing, comprising:
a plurality of cage segments formed of synthetic resin and arranged annularly in a circumferential direction, each of the cage segments including:
a first rim portion and a second rim portion that are spaced from each other by a predetermined interval and face each other; and
a plurality of bar portions extending from the first rim portion to the second rim portion,
wherein spaces, each of which is surrounded by the bar portions adjacent to each other, the first rim portion and the second rim portion, are formed as pockets that house rolling elements,
wherein projection portions for reinforcement are formed at radial end portions of boundaries between the bar portions and the first rim portion and/or boundaries between the bar portions and the second rim portion, and
wherein each of the projection portions has curved surfaces so as to guide lubricating oil to the pockets, a distance between the curved surfaces increases in a direction toward a rim portion-side in a plan view, and the curved surfaces face the pockets.