Title:
VEHICLE WHEEL BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/286771
Kind Code:
A1
Abstract:
Provided is a vehicle wheel bearing device that makes it possible to stabilize the orientation of a vehicle when turning by suppressing deformation of the raceway surface of an outer member. The vehicle wheel bearing device comprises: an outer ring (2) having a double row of outside raceway surfaces (2a) on the inner circumference thereof; an inner member having a double row of inside raceway surfaces facing the double row of outside raceway surfaces (2a); and a double row of rolling bodies that are accommodated so as to be capable of rolling between the raceway surfaces of the outer ring (2) and the inner member. The outer ring (2) has a hardened section (21) hardened along the outside raceway surfaces (2a). The hardening depth (D1) in the position brought into contact with the rolling bodies in the hardened section (21) is deeper than the generation depth (D2) of stress exceeding the yield point prior to hardening when the maximum stress anticipated during use is input.
Inventors:
HAYASHI MASAAKI (JP)
Application Number:
PCT/JP2022/027417
Publication Date:
January 19, 2023
Filing Date:
July 12, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/64; B60B35/02; C21D1/06; C21D1/10; C21D9/40; C22C38/00; C22C38/04; F16C19/18; F16C19/38
Domestic Patent References:
| WO2013035756A1 | 2013-03-14 |
Foreign References:
| JP2015078717A | 2015-04-23 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
Download PDF: