US 12,449,318 B2
Torque measuring device
Masahiro Kobayashi, Fukuroi (JP); Kota Fukuda, Fukuroi (JP); Hisayoshi Fukui, Fukuroi (JP); Takahiro Odera, Fukuroi (JP); Akitoshi Fujimori, Koto-ku (JP); Takashi Onimoto, Koto-ku (JP); and Yiming Jin, Koto-ku (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 Feb. 28, 2023, as Appl. No. 18/176,052.
Claims priority of application No. 2022-031027 (JP), filed on Mar. 1, 2022.
Prior Publication US 2023/0280219 A1, Sep. 7, 2023
Int. Cl. G01L 1/12 (2006.01); G01L 5/13 (2006.01)
CPC G01L 1/125 (2013.01) [G01L 5/136 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A torque measuring device comprising:
a casing made of a magnetic metal;
a rotating shaft rotatably arranged at an inner side of the casing and having a magnetostrictive effect section whose magnetic permeability changes according to torque to be transmitted; and
a torque sensor arranged around the magnetostrictive effect section and supported by the casing;
the torque sensor comprising: a coil unit formed in a cylindrical shape using a flexible substrate having a detection coil that changes voltage in response to changes in the magnetic permeability of the magnetostrictive effect section, and a holder made of rubber or synthetic resin, covering an outer peripheral surface of the coil unit, and having a portion that protrudes from the coil unit on both sides in an axial direction; and
the torque sensor supported by the casing with an outer peripheral surface of the holder fitted into an inner peripheral surface of the casing.