To provide a wheel bearing device capable of setting and keeping a proper fitting pre-pressing in a case of a serration fitting between a hub wheel and a constant velocity universal joint, establishing both an anti-wearing characteristic and a strength of the serration and further shortening a fitted effective length of the serration fitting.
The wheel bearing device comprises a bearing 2 having a plurality of rows of rollers 30 arranged among opposing outer laces 26, 27 and inner laces 28, 29, a hub wheel 1 fixed to a wheel and a constant velocity universal joint 3. A shaft part 12 of an outer joint member of the constant velocity universal joint fitted and inserted into a hole 22 of the hub wheel 1 is integrally fitted to the hub wheel 1 through a serration fitting. The inner diameter plane of the hole 22 of the hub wheel 1 has a female serration 42 fitted to a male serration 41 formed at the shaft part 12 of the outer joint member of the constant velocity universal joint 3. The female serration 42 is formed through a broach machining operation after a hardened layer H3 is arranged in at least an in-board side of a serration forming range of the hole part 22 of the hub wheel 1.
ISHIKAWA KIYOHITO
| JP2004006865A | 2004-01-08 | |||
| JP2002283804A | 2002-10-03 |
Yoshiyuki Shiraishi
Kunihiko Shiromura