US 11,874,195 B2
Preload inspection method for bearing device for vehicle wheel
Takayasu Takubo, Iwata (JP); Takuya Obata, Iwata (JP); and Takayuki Owada, Iwata (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 17/762,778
Filed by NTN Corporation, Osaka (JP)
PCT Filed Aug. 28, 2020, PCT No. PCT/JP2020/032681
§ 371(c)(1), (2) Date Mar. 23, 2022,
PCT Pub. No. WO2021/059865, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-175939 (JP), filed on Sep. 26, 2019.
Prior Publication US 2022/0349778 A1, Nov. 3, 2022
Int. Cl. G01M 13/04 (2019.01); B60B 27/00 (2006.01); F16C 19/18 (2006.01)
CPC G01M 13/04 (2013.01) [B60B 27/0094 (2013.01); F16C 19/18 (2013.01); B60B 2380/75 (2013.01); F16C 2326/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A preload inspection method for a bearing device for a vehicle wheel, wherein the bearing device for a vehicle wheel includes:
an outer member having multiple-row outer raceway surfaces;
an inner member that is configured with a hub ring and an inner ring press-fitted into a small-diameter step portion of the hub ring and has multiple-row inner raceway surfaces; and
multiple-row rolling bodies each interposed between the raceway surfaces of the outer member and the inner member, the preload inspection method comprising:
rotating one of the outer member and the inner member relative to the other of the outer member and the inner member, and calculating a power based on the rotation of the one of the outer member and the inner member, wherein the calculated power is an amount of labor per unit time;
calculating a preload value, which is applied to the rolling bodies, based on the calculated power; and
determining whether a preload state is acceptable based on whether or not the calculated preload value falls within an allowable range.