# US 11,298,976 B2 · Bearing device for vehicle wheel

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- Number: US 11,298,976 B2
- Document ID: US11298976B2
- Status: Granted
- Kind: B2
- Application number: 17/264,614
- Filed: 2019-08-06
- Published: 2021-09-23
- Granted: 2022-04-12
- Earliest claimed: 2018-08-16
- Assignees: Ntn Corporation
- Applicants: NTN Corporation
- Inventors: Ryou Sakurai; Adumi Nobukawa
- Web page: https://patentgrep.com/patent/US11298976B2

## CPC

- B60B 27/0073: {characterised by sealing means}
- F16C 35/00: Rigid support of bearing units; Housings, e.g. caps, covers (F16C23/00 takes precedence)
- F16C 35/077: between housing and outer race ring
- F16C 41/007: {Encoders, e.g. parts with a plurality of alternating magnetic poles}
- B60B 27/0068: {the element being a sensor}
- F16C 19/186: {with three raceways provided integrally on parts other than race rings, e.g. third generation hubs}
- F16C 33/7883: {mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section}
- F16C 2326/02: Wheel hubs or castors
- B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

In a bearing device for a vehicle wheel (1), a large-diameter section (2i) is formed on an outer side of a fitting cylinder section (2h), and a small-diameter section (2j) is formed on an inner side of the fitting cylinder section (2h). A cap member (8) is formed by bending a metal steel plate, and has a cover plate section (81) which closes the inner open end of an outer member (2) and a fitting section (82) which is fitted over the small-diameter section (2j). A tapered portion (83) based on the spring back angle θ of the fitting section (82) is provided at the outer peripheral edge of the outer end section of the fitting section (82).

## Claims

### Claim 1

A bearing device for a vehicle wheel, comprising:
an outer member formed with an outer raceway surface;
an inner member that includes a hub ring and at least one inner ring that is fitted over the hub ring, the inner member being formed with an inner raceway surface;
a rolling member interposed between respective raceway surfaces of the outer member and the inner member; and
a cap member that is fitted over the outer member,
the bearing device for a vehicle wheel being fixed in a state where a fitting cylinder section formed at an inner end section of the outer member is fitted into a fitting hole section of a vehicle body-side member, wherein,
wherein a large-diameter section is formed on an outer side of the fitting cylinder section,
a small-diameter section is formed on an inner side of the fitting cylinder section, and
the cap member is formed by bending a metal steel plate, to have a cover plate section that closes an inner open end of the outer member and have a fitting section that is fitted over the small-diameter section, the cap member being provided with a tapered portion based on a spring back angle of the fitting section, on an outer peripheral edge at an outer end section of the fitting section.

### Claim 2 (depends on 1)

The bearing device for a vehicle wheel according to claim 1, wherein
when an angle of an outer peripheral surface of the fitting section with respect to a rotation axis of the inner member is R1, and
an angle of the outer peripheral surface of the tapered portion with respect to an outer peripheral surface of the fitting section is R2,
a relational expression R1≤R2 is satisfied.

### Claim 3 (depends on 1)

The bearing device for a vehicle wheel according to claim 1, wherein
when an inner diameter of the fitting section is D1,
an outer diameter of the small-diameter section is D2,
an outer diameter of the fitting section is D3, and
an outer diameter of the large-diameter section is D4,
a relational expression D1≤D2 and a relational expression D3≤D4 are satisfied.

### Claim 4 (depends on 1)

The bearing device for a vehicle wheel according to claim 1, further comprising:
an encoder that rotates integrally with the inner member; and
a sensor that is in proximity to the encoder and detects magnetism of the encoder,
wherein the cap member supports the sensor.