# US 10,371,211 B2 · Bearing structure

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- Number: US 10,371,211 B2
- Document ID: US10371211B2
- Status: Granted
- Kind: B2
- Application number: 16/178,826
- Filed: 2018-11-02
- Published: 2019-06-13
- Granted: 2019-08-06
- Earliest claimed: 2017-12-12
- Assignees: Fanuc Corporation
- Applicants: Fanuc Corporation
- Inventors: Takeshi Saitou
- Web page: https://patentgrep.com/patent/US10371211B2

## CPC

- F16C 35/062: {Dismounting of ball or roller bearings}
- F16C 33/586: {outside the space between the races, e.g. end faces or bore of inner ring}
- F16C 35/042: {Housings for rolling element bearings for rotary movement}
- F16C 35/061: {mounting a plurality of bearings side by side}
- F16C 35/063: Fixing them on the shaft (with interposition of an element F16C35/07)
- F16C 19/26: with a single row of rollers
- F16C 2226/70: with complementary interlocking parts
- F16C 2237/00: Repair or replacement
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A bearing structure comprises: two bearings arranged in an axis direction and having outer rings and inner rings; and a spacer interposed between the bearings. The spacer comprises: a ring-like outer ring spacer interposed between the outer rings of the two bearings arranged in the axis direction, and having an insertion hole penetrating the outer ring spacer in a radial direction RD and into which a jig is to be inserted; and a ring-like inner ring spacer interposed between the inner rings of the two bearings arranged in the axis direction, and having an engagement part to make engagement with the jig inserted into the insertion hole. The one bearing is capable of being pulled out together with the spacer from a rotary shaft supported by the inner rings by pulling the jig in the axis direction inserted into the insertion hole and engaged with the engagement part.

## Claims

### Claim 1

A bearing structure comprising: two bearings arranged in an axis direction and having respective outer rings and respective inner rings to rotate relative to the outer rings; and a spacer interposed between the bearings, wherein
the spacer comprises:
a ring-like outer ring spacer interposed between the respective outer rings of the two bearings arranged in the axis direction, and having an insertion hole penetrating the outer ring spacer in a radial direction and into which a jig is to be inserted; and
a ring-like inner ring spacer interposed between the respective inner rings of the two bearings arranged in the axis direction, and having an engagement part to make engagement with the jig inserted into the insertion hole, and
one bearing of the two bearings is capable of being pulled out together with the spacer from a rotary shaft supported by the inner rings by pulling the jig in the axis direction (AD) inserted into the insertion hole and engaged with the engagement part.

### Claim 2 (depends on 1)

The bearing structure according to claim 1, wherein the inner ring spacer has a tapered part at which the inner ring spacer increases in inner diameter toward an end portion of the inner ring spacer in the axis direction pointing to the one bearing.