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公开(公告)号：US20250123166A1
公开(公告)日：2025-04-17
申请号：US18704151
申请日：2022-10-05
Applicant: NSK Ltd.
Inventor： Yiming JIN , Takashi ONIMOTO , Akitoshi FUJIMORI , Seigou URAKAMI , Kota FUKUDA
IPC: G01L3/10
Abstract: A magnetostrictive torque sensor for detecting a torque applied to a magnetostrictive member having magnetostrictive properties, includes a detection coil arranged on an outer peripheral side of the magnetostrictive member; a magnetic ring composed of a ferromagnetic material arranged on an outer peripheral side of the detection coil; a housing having a facing portion facing the magnetic ring across the detection coil; a plug member closing an opening formed between the magnetic ring and the facing portion; a resin mold section covering the housing while exposing the magnetic ring and the plug member; a cable electrically connected to the detection coil and drawn out from the housing and the resin mold section; and a heat shrinkable tube covering the housing, a portion of the resin mold section, and an end portion of the cable exposed from the housing and the resin mold section.
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公开(公告)号：US20170114876A1
公开(公告)日：2017-04-27
申请号：US15301372
申请日：2015-03-24
Applicant: NSK Ltd. , HONDA MOTOR CO., LTD.
Inventor： Kota FUKUDA , Toshirou TOYODA , Hiroki NISHII , Toshihiro SAITO
CPC classification number: F16H15/38 , F16D1/09 , F16D1/116 , F16D2001/103
Abstract: Fletching wear caused by elastic deformation in the axial direction of an input-side disk 2c due to thrust force of a pressure device is prevented. A female-spline section 13a formed around the middle section in the axial direction of the inner-circumferential surface of a center hole 19 in the input-side disk 2c and a male-spline section 12a formed around the outer-circumferential surface of one end section in the axial direction of an input rotating shaft 1b engage with a spline engagement. A disk-side fitting surface section 22 formed around a portion of the inner-circumferential surface of the center hole 19 in the input-side disk 2c that is adjacent to the other end side of the female-spline section 13a and a shaft-side fitting surface section 23 formed around a portion of the outer-circumferential surface of the input rotating shaft 1b that is adjacent to the other end side of the male spline section 12a are fitted together with an interference fit.
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公开(公告)号：US20250102383A1
公开(公告)日：2025-03-27
申请号：US18882911
申请日：2024-09-12
Applicant: NSK Ltd. , Proterial, Ltd.
Inventor： Kota FUKUDA , Seigou URAKAMI , Akitoshi FUJIMORI
IPC: G01L3/10
Abstract: A magnetostrictive torque sensor has: a holder having an inner cylindrical portion arranged around a rotating shaft; a side plate portion arranged on one side in an axial direction of the inner cylindrical portion; an outer cylindrical portion arranged on an outer side in a radial direction of the side plate portion; and a recessed accommodating portion communicating an inner space on an inner side in the radial direction of the outer cylindrical portion and an outer space, a cover covering an opening portion on the other side in the axial direction of the recessed accommodating portion, a flexible substrate having a detection portion; and a signal line portion, a part of which is accommodated inside the recessed accommodating portion, and a connector attached to a tip-end portion of the signal line portion, the cover having a connector support portion for supporting the connector.
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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
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.
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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.
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Patent Agency Ranking
公开(公告)号：US20220244118A1
公开(公告)日：2022-08-04
申请号：US17562469
申请日：2021-12-27
Applicant: Hitachi Metals, Ltd. , NSK Ltd.
Inventor： Teruyuki NAKAMURA , Yuta SUGIYAMA , Yiming JIN , Kota FUKUDA
IPC: G01L3/10
Abstract: A magnetostrictive torque sensor includes detection coils formed around a magnetostrictive material made of chrome steel or chrome molybdenum steel, a magnetic ring configured to cover around the detection coils, and a drive unit for providing alternating current excitation to the detection coils at an excitation frequency of 50 kHz or more and 333 kHz or less. A torque applied to the magnetostrictive material is detected based on a change in inductance of the detection coils. The magnetic ring is configured by wrapping around the detection coils with an amorphous tape made of amorphous soft magnetic material in a tape shape. The thickness of the magnetic ring is 1.455 times or more as thick as a skin effect thickness of the magnetostrictive material and less than 1.000 mm.
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公开(公告)号：US20240319029A1
公开(公告)日：2024-09-26
申请号：US18608325
申请日：2024-03-18
Applicant: Proterial, Ltd. , NSK Ltd.
Inventor： Akitoshi FUJIMORI , Takashi ONIMOTO , Seigou URAKAMI , Takumi SHINOJIMA , Kota FUKUDA
IPC: G01L3/10
CPC classification number: G01L3/102
Abstract: A magnetostrictive torque sensor is configured to be attached around a rotating shaft exhibiting a magnetostrictive effect and detects torque transmitted by the rotating shaft. The magnetostrictive torque sensor includes a holder being composed of a resin and including a cylinder portion with a hollow cavity in a center through which the rotating shaft is inserted, a flexible substrate that includes a detection portion on which a coil group composed of a combination of a plurality of detection coils aligned in a predetermined direction is formed by a wiring pattern, and a signal line portion on which a plurality of signal lines electrically connecting the coil group to an external device are formed by a wiring pattern, and a cylindrical magnetic ring being composed of a soft magnetic material and being arranged around an outer circumference of the cylinder portion of the holder. The flexible substrate is arranged in such a manner that the detection portion is curved and located between the cylinder portion of the holder and the magnetic ring, and a portion of the signal line portion is led out of the holder. The holder includes an annular wall surrounding an outer circumference of one axial end of the magnetic ring. The magnetic ring includes a retention hole that opens on an outer circumferential surface facing an inner circumferential surface of the annular wall. The holder and the magnetic ring are fixed by a shaft-shaped fastener that penetrates the annular wall and is inserted into the retention hole of the magnetic ring.
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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
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.
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公开(公告)号：US20220074010A1
公开(公告)日：2022-03-10
申请号：US17416756
申请日：2019-12-11
Applicant: NSK LTD.
Inventor： Kota FUKUDA , Junji ONO , Teruyuki NAKAMURA , Yuta SUGIYAMA
Abstract: A method for manufacturing a magnetostrictive torque sensor shaft (100) to which a sensor portion (2) of a magnetostrictive torque sensor (1) is to be attached includes: a heat treatment step of subjecting an iron-based shaft member to a carburizing, quenching, and tempering process; a shot peening step of performing shot peening using a steel shot media having a Vickers hardness at least equal to 1100 and at most equal to 1300, at least in a position on the shaft member, after the heat treatment step, to which the sensor portion (2) is to be attached; and a surface polishing step of subjecting the shaft member after the shot peening to surface polishing.
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公开(公告)号：US20210262532A1
公开(公告)日：2021-08-26
申请号：US16634992
申请日：2018-07-27
Applicant: NSK LTD.
Inventor： Toshirou TOYODA , Kota FUKUDA , Hiroki NISHII , Yuya DAIKOKU , Yuka KANEKO
Abstract: The reverse input shutoff clutch includes: an input member, an output member coaxially arranged with the input member, a pressed member having a pressed surface, and an engaging element. The engaging element, when rotational torque is inputted to the input member, moves in a direction away from the pressed surface due to engagement with the input member and transmits the rotational torque to the output member, and when rotational torque is reversely inputted to the output member, moves in a direction toward the pressed surface due to engagement with the output member, and prevents or suppresses relative rotation between the output member and the pressed member.
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