To provide a bearing device for a wheel that can drastically reduce the weight of an inner ring of a bearing and that can decrease a fuel, and to provide a method of manufacturing the inner ring of a bearing.
The bearing device for a wheel includes: an outer ring 25, on the inside circumference of which double rows of outside rolling surface 26, 27 are formed; at least an inner ring 24, on the outside circumference of which inside rolling surfaces 28, 29 facing the outside rolling surfaces 26, 27 of the outer ring 25 are formed; and double rows of rollers 30 accommodated rotatably between the outside rolling surfaces 26, 27 of the outer ring and the inside rolling surfaces 28, 29 of the inner ring 24. The inner ring 24 is formed by plastic working including at least roll forming and press working. Its wall thickness is made roughly the same over the entire length in the axial direction, and a wall thickness reduction part 68 by noncutting process is provided at the inside diameter part at both end sides in the axial direction.
| JPH10110727 | MANUFACTURE OF BEARING PART HAVING ROLLING SURFACE OF ROLLING BODY |
| JP2013060074 | VEHICLE HUB UNIT |
| JPS54111035 | THRUST ROLLER BEARING |
| JPH061835U | 1994-01-14 | |||
| JP2006181638A | 2006-07-13 | |||
| JP2007520668A | 2007-07-26 |
Yoshiyuki Shiraishi
Kunihiko Shiromura
Next Patent: DOUBLE-FRACTURED OR CUT OUTER RING, ITS MANUFACTURING METHOD AND SPLIT ROLLING BEARING