US 11,698,312 B2
Torque load member and method for manufacturing same, and torque measuring device
Kota Fukuda, Shizuoka (JP); Junji Ono, Kanagawa (JP); Shinji Okada, Shizuoka (JP); Teruyuki Nakamura, Tokyo (JP); and Yuta Sugiyama, Tokyo (JP)
Assigned to NSK LTD., Tokyo (JP); and PROTERIAL, LTD., Tokyo (JP)
Filed by NSK LTD., Tokyo (JP); and Proterial, Ltd., Tokyo (JP)
Filed on Sep. 29, 2021, as Appl. No. 17/488,494.
Claims priority of application No. 2020-164642 (JP), filed on Sep. 30, 2020.
Prior Publication US 2022/0099505 A1, Mar. 31, 2022
Int. Cl. G01L 3/10 (2006.01); H10N 35/00 (2023.01)
CPC G01L 3/102 (2013.01) [H10N 35/101 (2023.02)] 4 Claims
OG exemplary drawing
 
1. A torque load member, comprising:
a detected surface configured to face a magnetostrictive torque sensor, the detected surface having a cylindrical surface shape;
the detected surface being a shot peened surface whose magnetic anisotropy directed in a specific direction has been reduced by performing shot peening thereto at an arc height value of 0.31 mmA or more,
the torque load member having hysteresis of 2.0% FS or less, the hysteresis obtained by a characteristics data with respect to a torque measurement when a torque is measured while a torque loaded to the torque load member is changed so as to reciprocate between positive and negative rated torques.