公开(公告)号：US20230280219A1

公开(公告)日：2023-09-07

申请号：US18176052

申请日：2023-02-28

Applicant: NSK LTD. ,  Proterial, Ltd.

Inventor： Masahiro KOBAYASHI ,  Kota FUKUDA ,  Hisayoshi FUKUI ,  Takahiro ODERA ,  Akitoshi FUJIMORI ,  Takashi ONIMOTO ,  Yiming JIN

IPC: G01L1/12 ,  G01L5/13

CPC classification number: G01L1/125 ,  G01L5/136

Abstract: The torque measuring device includes: a casing made of a magnetic metal; a rotating shaft rotatably arranged inside 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 including 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.

公开(公告)号：US20220268649A1

公开(公告)日：2022-08-25

申请号：US17637263

申请日：2021-07-01

Applicant: NSK Ltd.

Inventor： Takahiro ODERA ,  Junji ONO ,  Masahiro KOBAYASHI ,  Kota FUKUDA

IPC: G01L3/10

Abstract: A torque measuring device includes: a magnetostrictive sensor having a ring-shaped holder arranged around a magnetostrictively affected section of a rotating shaft, a detecting section embedded in the holder and that changing a voltage according to a change in magnetic permeability of the magnetostrictively affected section; and a sensor-side engaging section; and a fixed member having a fixed-side engaging section, the fixed member not rotating even during operation. One of the sensor-side engaging portion and the fixed-side engaging section is a convex section and the other is a concave section. With the sensor-side engaging section and the fixed-side engaging section engaged with a concave-convex engagement, shifting of the position of the magnetostrictive sensor in the direction of rotation and the radial direction with respect to the substrate is prevented.

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.

公开(公告)号：US20230280221A1

公开(公告)日：2023-09-07

申请号：US18115294

申请日：2023-02-28

Applicant: NSK LTD. ,  Proterial, Ltd.

Inventor： Masahiro KOBAYASHI ,  Kota FUKUDA ,  Takahiro ODERA ,  Naoki FUTAKUCHI

IPC: G01L3/10

CPC classification number: G01L3/102 ,  G01L3/108

Abstract: A torque measuring device includes a bridge circuit in which four detection coils arranged around a magnetostrictive effect section of a rotating shaft are arranged on four sides; and the bridge circuit includes a resistance element connected to at least one of the four sides for adjusting a resistance value of the side.

公开(公告)号：US20230037362A1

公开(公告)日：2023-02-09

申请号：US17788447

申请日：2021-07-01

Applicant: NSK LTD.

Inventor： Takahiro ODERA ,  Junji ONO ,  Masahiro KOBAYASHI ,  Kota FUKUDA

IPC: G01L3/10

Abstract: A torque measurement device includes a case that does not rotate even during use; a rotating shaft rotatably supported to the case and having a magnetostrictive effect part whose magnetic permeability changes according to a transmitted torque; and a magnetostrictive sensor having a detection part arranged closely adjacent to the magnetostrictive effect part so that a voltage changes according to change of the magnetic permeability of the magnetostrictive effect part, and being supported to the case; and the torque measurement device has a rotation-preventing construction configured to prevent the magnetostrictive sensor from rotating with respect to the case.