公开(公告)号：US20240418586A1

公开(公告)日：2024-12-19

申请号：US18703537

申请日：2022-10-05

Applicant: NSK Ltd.

Inventor： Yiming JIN ,  Akitoshi FUJIMORI ,  Yoshinori KUBO ,  Junji ONO ,  Kota FUKUDA ,  Takahiro ODERA

IPC: G01L3/10

Abstract: A magnetostrictive torque sensor, configured to be mounted around a rotating shaft having a magnetostrictive effect and to detect torque applied to the rotating shaft, is provided with a support member having a cylindrical portion through which the rotating shaft is inserted; a flexible substrate arranged around an outer periphery of the cylindrical portion and having a plurality of coils composed of wiring patterns; and a tightening member that tightens the flexible substrate toward an outer peripheral surface of the cylindrical portion. The tightening member may be a tubular heat-shrinkable tube that shrinks upon heating. A method for manufacturing the magnetostrictive torque sensor includes placing the flexible substrate around the outer periphery of the cylindrical portion of the support member and placing the heat-shrinkable tube around an outer periphery of the flexible substrate; and tightening the flexible substrate toward the outer peripheral surface of the cylindrical portion by heating the heat-shrinkable tube to shrink the heat-shrinkable tube.

公开(公告)号：US20230280223A1

公开(公告)日：2023-09-07

申请号：US18176098

申请日：2023-02-28

Applicant: NSK LTD. ,  PROTERIAL, LTD.

Inventor： Masahiro KOBAYASHI ,  Kota FUKUDA ,  Hisayoshi FUKUI ,  Takahiro ODERA ,  Haruhiko TANNO ,  Yoshinori KUBO ,  Naoki FUTAKUCHI ,  Ken OKUYAMA ,  Teruyuki NAKAMURA

IPC: G01L3/10

CPC classification number: G01L3/102 ,  G01L3/108

Abstract: The manufacturing method includes: performing testing of samples having the same configuration as the torque measuring device to be manufactured to find a coil balance Cb that is a ratio (R1×R3)/(R2×R4) of a product R1×R3 of resistance values R1 and R3 of one pair of opposite sides of the four sides of a bridge circuit 8, and a product R2×R4 of resistance values R2 and R4 of another pair of opposite sides of the four sides, and a temperature change rate VT of output voltage Vo of a sensor portion 4, and acquiring a relationship X between the coil balance Cb and the temperature change rate VT from the test results; and measuring the resistance values R1, R2, R3, R4 of the four sides to find the coil balance Cb to find the temperature change rate VT from the relationship X for the torque measuring device to be manufactured.