Title:
PRELOAD INSPECTION METHOD FOR WHEEL BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/039203
Kind Code:
A1
Abstract:
The preload inspection method for wheel bearing devices comprises: a press-fitting step (S02) for press-fitting an inner ring (4) into a small diameter step part (3a); a first bearing preload value calculation step (S03) for calculating a first bearing preload value (P1) on the basis of an axial negative gap (G1) between a raceway surface and a rolling element after the press-fitting step (S02); a post-press-fit rotational torque measurement step (S05) for measuring a post-press-fit rotational torque (Ta) after the press-fitting step; a crimping step (S06) for crimping the small diameter step part to the inner ring after the post-press-fit rotational torque measurement step; a post-crimping rotational torque measurement step (S07) for measuring a post-crimping rotational torque (Tb) after the crimping step; a second bearing preload value calculation step (S08) for calculating a second bearing preload value (P2) by adding a preload change amount (ΔP) based on a difference torque (ΔT) between the post-press-fit rotational torque (Ta) and the post-crimping rotational torque (Tb) to the first bearing preload value (P1); and a determination step (S09) for determining the suitability of the preload depending on whether or not the second bearing preload value (P2) is within a range of a reference value.
Inventors:
TAMAKI SHUN (JP)
HAYASHI MASAAKI (JP)
KUBOTA SADAYUKI (JP)
BABA TOMOKO (JP)
HAYASHI MASAAKI (JP)
KUBOTA SADAYUKI (JP)
BABA TOMOKO (JP)
Application Number:
PCT/JP2021/030253
Publication Date:
February 24, 2022
Filing Date:
August 18, 2021
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C19/14; B60B35/02; F16C19/18; F16C25/08; F16C33/64; F16C43/04; G01K1/14; G01L5/00; G01M13/04
Foreign References:
| JP2020098163A | 2020-06-25 | |||
| JP2000009562A | 2000-01-14 | |||
| JP2013198949A | 2013-10-03 | |||
| JP2016057311A | 2016-04-21 | |||
| JPH10185717A | 1998-07-14 |
Other References:
See also references of EP 4202243A4
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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