# US 2014/0193111 A1 · Cage and rolling bearing

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- Number: US 2014/0193111 A1
- Document ID: US20140193111A1
- Status: Published application
- Kind: A1
- Application number: 14/131,820
- Filed: 2012-11-29
- Published: 2014-07-10
- Earliest claimed: 2011-11-29
- Assignees: Nsk Ltd.
- Applicants: Nsk Ltd.
- Inventors: Kenta Kenmochi; Atsushi Minakami; Yoshiaki Katsuno
- Web page: https://patentgrep.com/patent/US20140193111A1

## CPC

- F16C 33/3887: {Details of individual pockets, e.g. shape or ball retaining means}
- F16C 33/4676: {of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers}
- F16C 19/06: with a single row or balls
- F16C 2240/46: Gap sizes or clearances
- F16C 2322/39: General buildup of machine tools, e.g. spindles, slides, actuators
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A cage 11 for holding a plurality of rolling elements 20 incorporated between an inner ring and an outer ring by a plurality of pockets with their centers arranged at regular intervals in the revolving direction of the rolling elements 20 includes at least one drive pocket 14 having a smaller clearance 22 in the revolving direction of the cage 11 and rolling elements 20 than the clearances of the remaining non-drive pockets 15 in the cage 11. Thus, drive power to be applied to the cage 11 can be always maintained constant and the swinging motion of the cage 11 during revolution can be prevented, thereby being able to reduce cage sounds.

## Claims

### Claim at position 1

-8. (canceled)

### Claim 9

A cage for holding a plurality of rolling elements incorporated between an inner ring and an outer ring by a plurality of pockets in which centers of the pockets set at regular intervals in the revolving direction of the rolling elements, wherein:
the cage includes at least one drive pocket, the clearance of which in the revolving direction of the cage and the rolling elements is formed smaller than those of the remaining pockets in the cage; and
the remaining pockets are non-drive pockets.

### Claim 10 (depends on 9)

The cage according to claim 9, wherein
the cage is a raceway ring guide type cage.

### Claim 11 (depends on 9)

The cage according to claim 9, wherein
the rolling elements are balls.

### Claim 12 (depends on 9)

The cage according to claim 9, wherein
the axial-direction clearances of at least three drive pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage.

### Claim 13 (depends on 9)

The cage according to claim 9, wherein
the axial-direction clearances of at least three non-drive pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage.

### Claim 14 (depends on 10)

The cage according to claim 10, wherein
the axial-direction clearances of at least three non-drive pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage.

### Claim 15 (depends on 11)

The cage according to claim 11, wherein
the axial-direction clearances of at least three non-drive pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage.

### Claim 16 (depends on 9)

The cage according to claim 9, wherein:
the axial-direction clearances of at least three pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage; and
the at least three pockets are combinations of the drive pocket and the non-drive pocket.

### Claim 17 (depends on 10)

The cage according to claim 10, wherein:
the axial-direction clearances of at least three pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage; and
the at least three pockets are combinations of the drive pocket and the non-drive pocket.

### Claim 18 (depends on 11)

The cage according to claim 11, wherein:
the axial-direction clearances of at least three pockets arranged at phase intervals of 180 degrees or less are formed smaller than those of the remaining pockets in the cage, thereby restricting the amount of the axial-direction movement of the cage; and
the at least three pockets are combinations of the drive pocket and the non-drive pocket.

### Claim 19 (depends on 9)

The cage according to claim 9, wherein
the plurality of pockets are substantially equal in volume.

### Claim 20 (depends on 9)

A rolling bearing using a cage according to claim 9.