# US 8,539,860 B2 · Shaft apparatus with bearing

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- Number: US 8,539,860 B2
- Document ID: US8539860B2
- Status: Granted
- Kind: B2
- Application number: 13/064,353
- Filed: 2011-03-21
- Published: 2011-08-18
- Granted: 2013-09-24
- Earliest claimed: 2007-11-27
- Assignees: Jtekt Corporation
- Applicants: Yoshitaka Waseda
- Inventors: Yoshitaka Waseda
- Web page: https://patentgrep.com/patent/US8539860B2

## CPC

- F01L 1/047: Camshafts
- F16C 19/466: {comprising needle rollers and an outer ring, i.e. subunit without inner ring}
- F16C 23/08: self-adjusting
- F16C 35/067: Fixing them in a housing (with interposition of an element F16C35/07)
- F01L 2001/0476: {Camshaft bearings}
- F16C 2226/50: Positive connections
- F16C 2360/18: Camshafts
- Y10T 74/2101: Cams
- Y10T 74/2173: Cranks and wrist pins
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A bearing apparatus for including a camshaft, a plurality of cam blocks disposed in an axial direction on the camshaft, a housing member including an arc concave portion, a cap member which is fixed to the housing and includes an arc concave portion, a roller bearing interposed between the arc concave portion of the housing member and the arc concave portion of the cap member so as to rotatably support the camshaft, and annular first and second control rings which are separately provided from the camshaft, and are press-fitted and fixed to an outer surface of the camshaft at opposite side portions of the roller bearing in the axial direction. Surfaces of the first and second rings that face each other are formed as slide surfaces, and the slide surfaces come in contact with opposite side surfaces of at least one of the housing member and the cap member to receive an axial load.

## Claims

### Claim 1

A bearing apparatus comprising:
a camshaft;
a plurality of cam blocks disposed in an axial direction on the camshaft;
a housing member including an are concave portion;
a cap member which is fixed to the housing member and includes an arc concave portion;
a roller bearing interposed between the arc concave portion of the housing member and the arc concave portion of the cap member so as to rotatably support the camshaft; and
annular first and second control rings which are separately provided from the camshaft, and are press-fitted and fixed to an outer surface of the camshaft at opposite side portions of the roller bearing in the axial direction,
wherein surfaces of the first and second control rings that face each other are formed as slide surfaces, and the slide surfaces come in contact with opposite side surfaces of at least one of the housing member and the cap member to receive an axial load.

### Claim 2 (depends on 1)

The bearing apparatus according to claim 1, wherein the first and second control rings are composed of a material having lower hardness than the camshaft.

### Claim 3 (depends on 1)

The bearing apparatus according to claim 1, wherein the first and second control rings are configured such that a gap, in a radial direction, is formed between at least one of the housing member and the cap member and the slide surfaces through which a lubricant can be injected.

### Claim 4 (depends on 1)

The bearing apparatus according to claim 1, wherein the first and second control rings are fixed so as to rotate with the camshaft.

### Claim 5 (depends on 1)

The bearing apparatus according to claim 1, wherein at least one of the housing member and the cap member includes an annular wall extending so as to overlap a portion of the first control ring and a portion of second control ring so as to form a gap in a radial direction.

### Claim 6 (depends on 5)

The bearing apparatus according to claim 5, wherein an opening of the gap between the annular wall and the portion of the first control ring and the portion of the second control ring faces in the axial direction.

### Claim 7 (depends on 1)

The bearing apparatus according to claim 1, wherein the housing member includes annular walls, extending in the axial direction, which overlap a portion of the first control ring and a portion of the second control ring and the cap member includes annular walls, extending in the axial direction, which overlap an other portion of the first control ring and an other portion of the second control ring.

### Claim 8 (depends on 1)

The bearing apparatus according to claim 1, wherein the first and second control rings extend radially outward of the roller bearing.