Title:
WHEEL BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/043123
Kind Code:
A1
Abstract:
The present invention addresses the problem of making a wheel bearing device further lightweight while increasing the rigidity of the wheel bearing device. This wheel bearing device (1) comprises: an outer ring (2) having a double row of outer raceways (23), (24); an inner member which is composed of a hub ring (3) having a small-diameter step (31) extending in the axial direction on the outer periphery of the hub ring, and an inner ring (4) press-fitted into the small-diameter step (31), and has a double row of inner raceways (33), (41) opposing the double row of outer raceways (23), (24); and a double row of ball lines (5), (6) rollably accommodated between both raceways of the outer ring (2) and the inner member, wherein the hub ring (3) has a caulked part (38) caulked to the inner ring (4) on the axial direction end of the hub ring, and the circularity A of an outer peripheral surface (38a) of the caulked part (38) is 0.4 or lower.
Inventors:
SHIGEOKA KAZUHISA (JP)
BABA TOMOKO (JP)
BABA TOMOKO (JP)
Application Number:
PCT/JP2023/029339
Publication Date:
February 29, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/58; B21D39/00; B60B35/02; F16C19/18
Foreign References:
| JP2004257415A | 2004-09-16 | |||
| US20200392999A1 | 2020-12-17 | |||
| JPH0384218A | 1991-04-09 | |||
| JP2007076524A | 2007-03-29 | |||
| JP2004257410A | 2004-09-16 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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