# US 8,539,676 B2 · Rolling bearing system for vehicles

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- Number: US 8,539,676 B2
- Document ID: US8539676B2
- Status: Granted
- Kind: B2
- Application number: 12/832,842
- Filed: 2010-07-08
- Published: 2010-10-28
- Granted: 2013-09-24
- Earliest claimed: 2006-01-20
- Assignees: Jtekt Corporation
- Applicants: Yoshito Takada
- Inventors: Yoshito Takada
- Web page: https://patentgrep.com/patent/US8539676B2

## CPC

- G01P 3/443: {mounted in bearings (bearings F16C)}
- B60B 27/00: Hubs (non-metallic B60B5/00; of high resiliency B60B9/00)
- F16C 33/723: {Shaft end sealing means, e.g. cup-shaped caps or covers}
- F16C 41/007: {Encoders, e.g. parts with a plurality of alternating magnetic poles}
- F16C 19/186: {with three raceways provided integrally on parts other than race rings, e.g. third generation hubs}
- F16C 2326/02: Wheel hubs or castors
- Y10T 29/49643: Rotary bearing
- Y10T 29/49679: Anti-friction bearing or component thereof
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides a rolling bearing device for vehicles capable of detecting a change in magnetism with high accuracy. A rolling bearing device H for vehicles in accordance with the present invention includes a rolling bearing 13 having an inner ring 11, which is a rotating ring, and an outer ring 12, which is a fixed ring, and rolling elements 3 and 4 interposed between both of the races 11 and 12; a magnetized element 14; a magnetic sensor 15; and a cover 16. The cover 16 is formed by demagnetizing a nonmagnetic material having being pressed.

## Claims

### Claim 1

A method for manufacturing a rolling bearing device for vehicles, comprising:
providing a rolling bearing having an inner ring and an outer ring and a rolling element interposed between two races;
disposing a magnetized element on one side in the axial direction of the inner ring;
forming a pressed cover by pressing a metallic material of one of austenitic stainless steel, aluminum, copper and brass;
demagnetizing the pressed cover, thereby removing magnetism that is acquired by pressing the metallic material; and
attaching the pressed cover to the outer ring so as to cover the magnetized element.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the step of demagnetizing the pressed cover includes demagnetizing the pressed cover until the residual magnetism of the pressed cover is not higher than 3 gausses.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the step of demagnetizing the pressed cover includes demagnetizing the pressed cover until the residual magnetism of the pressed cover is not higher than 1 gauss.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the step of demagnetizing the pressed cover is accomplished by an AC demagnetizing process.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the step of demagnetizing the pressed cover is accomplished by a thermal demagnetizing process.

### Claim 6 (depends on 1)

The method according to claim 1, further comprising forming the magnetized element by forming opposite magnetic poles alternately in the circumferential direction on a rubber magnet in which magnetic particles are mixed with an elastomer.

### Claim 7

A method for manufacturing a rolling bearing device for vehicles, comprising:
attaching an outer ring member to a vehicle body side;
providing an inner ring member provided with a first inner ring having a flange portion for attaching a wheel and a column portion and a second inner ring attached to a small-diameter shank portion formed in an end portion on one side of the column portion;
providing double-row rolling elements arranged between first and second outer ring raceway surfaces formed in rows in the axial direction on the inner peripheral surface of the outer ring member and first and second inner ring raceway surfaces formed on an outer peripheral surface of the column portion of the first inner ring and the outer peripheral surface of the second inner ring;
providing a magnetized pulser ring provided with a support member attached to the outer peripheral surface of a shoulder portion formed in an end portion on one side of the inner ring and a pulser formed of a magnetic material attached to a side surface on one side of the support member and magnetized so as to have opposite magnetic poles alternately in the circumferential direction;
forming a pressed cover by pressing a metallic material of one of austenitic stainless steel, aluminum, copper and brass;
demagnetizing the pressed cover, thereby removing magnetism that is acquired by pressing the metallic material; and
attaching the pressed cover to an end portion on one side of the outer ring so as to cover the magnetized pulser ring and formed of a demagnetized pressed metallic material.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the step of demagnetizing the pressed cover includes demagnetizing the pressed cover until the residual magnetism of the pressed cover is not higher than 3 gausses.

### Claim 9 (depends on 7)

The method according to claim 7, wherein the step of demagnetizing the pressed cover includes demagnetizing the pressed cover until the residual magnetism of the pressed cover is not higher than 1 gauss.

### Claim 10 (depends on 7)

The method according to claim 7, wherein the step of demagnetizing the pressed cover is accomplished by an AC demagnetizing process.

### Claim 11 (depends on 7)

The method according to claim 7, wherein the step of demagnetizing the pressed cover is accomplished by a thermal demagnetizing process.