Title:
PRELOAD INSPECTION METHOD OF WHEEL BEARING DEVICE
Document Type and Number:
Japanese Patent JP2022034925
Kind Code:
A
Abstract:
To provide a preload inspection method of a wheel bearing device capable of inspecting a preload with high reliability.SOLUTION: A preload inspection method includes: a press-fitting process S02 for press-fitting an inner ring 4 to a small-diameter step portion 3a; a first bearing preload value calculation portion S03 for calculating a first bearing preload value P1 on the basis of an axial negative clearance G1 between a raceway surface and a rolling element after the press-fitting process S02; an after-press-fitting rotational torque measurement process S05 for measuring after-press-fitting rotational torque Ta, after the press-fitting process; a caulking process S06 for caulking the small-diameter step portion to the inner ring after the after-press-fitting rotational torque measurement process; an after-caulking rotational torque measurement process S07 for measuring after-caulking rotational torque Tb after the caulking process; a second bearing preload value calculation process S08 for calculating a second bearing preload value P2 by adding a preload change amount ΔP based on differential torque ΔT between the after-press-fitting rotational torque and the after-caulking rotational torque to the first bearing preload value; and a determination process S09 for determining propriety of the preload on the basis of whether the second bearing preload value is a within a range of a reference value or not.SELECTED DRAWING: Figure 2
Inventors:
TAMAKI SHUN
Application Number:
JP2020138869A
Publication Date:
March 04, 2022
Filing Date:
August 19, 2020
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C25/08; B60B35/02; F16C19/18; F16C43/04; G01L5/00; G01M13/04
Attorney, Agent or Firm:
Yanouchi Foreign Patent Office