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1. 发明申请

US20170114876A1 TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSION 审中-公开
公开(公告)号：US20170114876A1
公开(公告)日：2017-04-27
申请号：US15301372
申请日：2015-03-24
申请人： NSK Ltd. , HONDA MOTOR CO., LTD.
发明人： Kota FUKUDA , Toshirou TOYODA , Hiroki NISHII , Toshihiro SAITO
IPC分类号： F16H15/38 , F16D1/09
CPC分类号： F16H15/38 , F16D1/09 , F16D1/116 , F16D2001/103
摘要： 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.

2. 发明公开

US20230280221A1 TORQUE MEASURING DEVICE 审中-公开
公开(公告)号：US20230280221A1
公开(公告)日：2023-09-07
申请号：US18115294
申请日：2023-02-28
申请人： NSK LTD. , Proterial, Ltd.
发明人： Masahiro KOBAYASHI , Kota FUKUDA , Takahiro ODERA , Naoki FUTAKUCHI
IPC分类号： G01L3/10
CPC分类号： G01L3/102 , G01L3/108
摘要： 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.

3. 发明申请

US20230037362A1 TORQUE MEASUREMENT DEVICE 有权
公开(公告)号：US20230037362A1
公开(公告)日：2023-02-09
申请号：US17788447
申请日：2021-07-01
申请人： NSK LTD.
发明人： Takahiro ODERA , Junji ONO , Masahiro KOBAYASHI , Kota FUKUDA
IPC分类号： G01L3/10
摘要： 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.

4. 发明申请

US20220244118A1 MAGNETOSTRICTIVE TORQUE SENSOR AND DESIGN METHOD OF THICKNESS OF MAGNETIC RING FOR MAGNETOSTRICTIVE TORQUE SENSOR 有权
公开(公告)号：US20220244118A1
公开(公告)日：2022-08-04
申请号：US17562469
申请日：2021-12-27
申请人： Hitachi Metals, Ltd. , NSK Ltd.
发明人： Teruyuki NAKAMURA , Yuta SUGIYAMA , Yiming JIN , Kota FUKUDA
IPC分类号： G01L3/10
摘要： 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.

5. 发明公开

US20230280219A1 TORQUE MEASURING DEVICE 审中-公开
公开(公告)号：US20230280219A1
公开(公告)日：2023-09-07
申请号：US18176052
申请日：2023-02-28
申请人： NSK LTD. , Proterial, Ltd.
发明人： Masahiro KOBAYASHI , Kota FUKUDA , Hisayoshi FUKUI , Takahiro ODERA , Akitoshi FUJIMORI , Takashi ONIMOTO , Yiming JIN
IPC分类号： G01L1/12 , G01L5/13
CPC分类号： G01L1/125 , G01L5/136
摘要： 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.

6. 发明申请

US20220268649A1 TORQUE MEASURING DEVICE 有权
公开(公告)号：US20220268649A1
公开(公告)日：2022-08-25
申请号：US17637263
申请日：2021-07-01
申请人： NSK Ltd.
发明人： Takahiro ODERA , Junji ONO , Masahiro KOBAYASHI , Kota FUKUDA
IPC分类号： G01L3/10
摘要： 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.

7. 发明申请

US20220026294A1 METHOD OF MANUFACTURING MAGNETOSTRICTIVE TORQUE SENSOR SHAFT 有权
公开(公告)号：US20220026294A1
公开(公告)日：2022-01-27
申请号：US17416850
申请日：2019-12-11
申请人： NSK LTD.
发明人： Kota FUKUDA , Junji ONO , Teruyuki NAKAMURA , Yuta SUGIYAMA
IPC分类号： G01L3/10 , B24C1/10 , C21D9/00 , C21D8/06
摘要： A method of manufacturing a magnetostrictive torque sensor shaft (100) to which a sensor portion (2) of a magnetostrictive torque sensor (1) is mounted. The method includes heat treatment step of subjecting an iron-based shaft member to a carburizing, quenching, and tempering process, and 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 and being free of boron, at least in a position on the shaft member, after the heat treatment step, to which the sensor portion is to be attached.

8. 发明申请

US20210278296A1 DETECTION CIRCUIT AND DETECTION METHOD FOR MAGNETOSTRICTIVE TORQUE SENSOR 有权
公开(公告)号：US20210278296A1
公开(公告)日：2021-09-09
申请号：US17190138
申请日：2021-03-02
申请人： Hitachi Metals, Ltd. , NSK Ltd.
发明人： Yuta SUGIYAMA , Teruyuki NAKAMURA , Junji ONO , Kota FUKUDA
IPC分类号： G01L3/10
摘要： A detection circuit for a magnetostrictive torque sensor is configured to detect a torque applied to a magnetostrictive material treated by shot peening. The detection circuit includes a detection coil provided around the magnetostrictive material, and a drive unit for providing alternating current excitation to the detection coil. The torque applied to the magnetostrictive material is detected based on a change in inductance of the detection coil, and the drive unit provides alternating current excitation at a frequency at which a skin effect thickness is not more than an effective depth of the shot peening.

9. 发明公开

US20240319029A1 MAGNETOSTRICTIVE TORQUE SENSOR 审中-公开
公开(公告)号：US20240319029A1
公开(公告)日：2024-09-26
申请号：US18608325
申请日：2024-03-18
申请人： Proterial, Ltd. , NSK Ltd.
发明人： Akitoshi FUJIMORI , Takashi ONIMOTO , Seigou URAKAMI , Takumi SHINOJIMA , Kota FUKUDA
IPC分类号： G01L3/10
CPC分类号： G01L3/102
摘要： 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.

10. 发明公开

US20230280223A1 TORQUE MEASURING DEVICE AND MANUFACTURING METHOD THEREOF 审中-公开
公开(公告)号：US20230280223A1
公开(公告)日：2023-09-07
申请号：US18176098
申请日：2023-02-28
申请人： NSK LTD. , PROTERIAL, LTD.
发明人： Masahiro KOBAYASHI , Kota FUKUDA , Hisayoshi FUKUI , Takahiro ODERA , Haruhiko TANNO , Yoshinori KUBO , Naoki FUTAKUCHI , Ken OKUYAMA , Teruyuki NAKAMURA
IPC分类号： G01L3/10
CPC分类号： G01L3/102 , G01L3/108
摘要： 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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