Patents Assigned to NHK International Corporation
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Patent number: 11125295Abstract: According to an embodiment, a damping device includes a base member including a first base and a second base, a weight member, a pair of first base-side coil springs provided between the first base and the weight member, and a pair of second base-side coil springs provided between the second base and the weight member. Each of the first base-side coil springs includes a first effective turn portion, a first fixed pin portion supported in the first base, and a first movable pin portion supported in the weight member. Each of the second base-side coil springs includes a second effective turn portion, a second fixed pin portion supported in the second base, and a second movable pin portion supported in the weight member.Type: GrantFiled: August 30, 2019Date of Patent: September 21, 2021Assignee: NHK INTERNATIONAL CORPORATIONInventors: Shinichi Nishizawa, Vinay Ravi, Norifumi Momoi
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Publication number: 20210062885Abstract: According to an embodiment, a damping device includes a base member including a first base and a second base, a weight member, a pair of first base-side coil springs provided between the first base and the weight member, and a pair of second base-side coil springs provided between the second base and the weight member. Each of the first base-side coil springs includes a first effective turn portion, a first fixed pin portion supported in the first base, and a first movable pin portion supported in the weight member. Each of the second base-side coil springs includes a second effective turn portion, a second fixed pin portion supported in the second base, and a second movable pin portion supported in the weight member.Type: ApplicationFiled: August 30, 2019Publication date: March 4, 2021Applicant: NHK International CorporationInventors: Shinichi NISHIZAWA, Vinay RAVI, Norifumi MOMOI
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Patent number: 10443670Abstract: A damping device according to one embodiment includes a base member fixed to a vibration suppression target, a first coil spring, a second coil spring, and a weight member. The first coil spring includes a first fixed-side end turn portion supported on a first support portion of the base member, a first effective portion, and a first movable-side end turn portion. The second coil spring includes a second fixed-side end turn portion supported on a second support portion of the base member, a second effective portion, and a second movable-side end turn portion. Each of the first coil spring and the second coil spring is deflected in a longitudinal direction along the axis, and a transverse direction perpendicular to the axis. The weight member is arranged between the first coil spring and the second coil spring, and moves in the longitudinal direction and the transverse direction.Type: GrantFiled: March 5, 2018Date of Patent: October 15, 2019Assignee: NHK INTERNATIONAL CORPORATIONInventors: Shinichi Nishizawa, Norifumi Momoi, Liwen Lee, Jeff Butts, Fang Dai
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Publication number: 20190271370Abstract: A damping device according to one embodiment includes a base member fixed to a vibration suppression target, a first coil spring, a second coil spring, and a weight member. The first coil spring includes a first fixed-side end turn portion supported on a first support portion of the base member, a first effective portion, and a first movable-side end turn portion. The second coil spring includes a second fixed-side end turn portion supported on a second support portion of the base member, a second effective portion, and a second movable-side end turn portion. Each of the first coil spring and the second coil spring is deflected in a longitudinal direction along the axis, and a transverse direction perpendicular to the axis. The weight member is arranged between the first coil spring and the second coil spring, and moves in the longitudinal direction and the transverse direction.Type: ApplicationFiled: March 5, 2018Publication date: September 5, 2019Applicant: NHK INTERNATIONAL CORPORATIONInventors: Shinichi NISHIZAWA, Norifumi MOMOI, Liwen LEE, Jeff BUTTS, Fang DAI
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Patent number: 9835217Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a hydraulic pressure supply device, a torsion detection mechanism, and a controller. The torsion detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. The displacement gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. The controller calculates a relative torsional angle between the first attachment member and the second attachment member based on the detected displacement.Type: GrantFiled: February 12, 2015Date of Patent: December 5, 2017Assignees: NHK SPRING CO., LTD., NHK INTERNATIONAL CORPORATIONInventors: Takahiro Nakamura, Kazuo Furukawa, Senri Moriyama, Ryuichi Sato, Shinichi Nishizawa
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Patent number: 9811067Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a spring height detection mechanism, and a controller. The spring height detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. These gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. A hydraulic pressure supply device is controlled by the controller and supplies fluid pressure according to the displacement detected by the gauges to the respective hydraulic cylinders.Type: GrantFiled: February 12, 2015Date of Patent: November 7, 2017Assignees: NHK SPRING CO., LTD., NHK INTERNATIONAL CORPORATIONInventors: Takahiro Nakamura, Kazuo Furukawa, Senri Moriyama, Ryuichi Sato, Shinichi Nishizawa
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Patent number: 9470590Abstract: A coil spring modeling apparatus includes an actuator unit formed of a Stewart-platform-type parallel mechanism, a first inner load cell accommodated in a first attachment member, a second inner load cell accommodated in a second attachment member, and a rotation support mechanism. The actuator unit is rotatably supported by the rotation support mechanism about an axis. The first inner load cell is arranged on the first seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the lower spring seat and a moment. The second inner load cell is arranged under the second seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the upper spring seat and a moment.Type: GrantFiled: February 12, 2015Date of Patent: October 18, 2016Assignees: NHK SPRING CO., LTD., NHK INTERNATIONAL CORPORATIONInventors: Takahiro Nakamura, Kazuo Furukawa, Senri Moriyama, Ryuichi Sato, Shinichi Nishizawa
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Publication number: 20160239004Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a spring height detection mechanism, and a controller. The spring height detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. These gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. A hydraulic pressure supply device is controlled by the controller and supplies fluid pressure according to the displacement detected by the gauges to the respective hydraulic cylinders.Type: ApplicationFiled: February 12, 2015Publication date: August 18, 2016Applicants: NHK SPRING CO., LTD., NHK INTERNATIONAL CORPORATIONInventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
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Publication number: 20160238473Abstract: A coil spring modeling apparatus includes an actuator unit formed of a Stewart-platform-type parallel mechanism, a first inner load cell accommodated in a first attachment member, a second inner load cell accommodated in a second attachment member, and a rotation support mechanism. The actuator unit is rotatably supported by the rotation support mechanism about an axis. The first inner load cell is arranged on the first seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the lower spring seat and a moment. The second inner load cell is arranged under the second seat adapter coaxially with the rotation support mechanism, and detects an axial force acting on the upper spring seat and a moment.Type: ApplicationFiled: February 12, 2015Publication date: August 18, 2016Applicants: NHK INTERNATIONAL CORPORATION, NHK SPRING CO., LTD.Inventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
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Publication number: 20160238098Abstract: A coil spring modeling apparatus includes a first attachment member disposed on a lower spring seat, a second attachment member disposed on an upper spring seat, an actuator unit formed of a Stewart-platform-type parallel mechanism, a hydraulic pressure supply device, a torsion detection mechanism, and a controller. The torsion detection mechanism is constituted of displacement gauges such as a linear variable differential transformer. The displacement gauges are provided on hydraulic cylinders, and detect amounts of displacement relative to the reference lengths of the hydraulic cylinders, respectively. The controller calculates a relative torsional angle between the first attachment member and the second attachment member based on the detected displacement.Type: ApplicationFiled: February 12, 2015Publication date: August 18, 2016Applicants: NHK INTERNATIONAL CORPORATION, NHK SPRING CO., LTD.Inventors: Takahiro NAKAMURA, Kazuo FURUKAWA, Senri MORIYAMA, Ryuichi SATO, Shinichi NISHIZAWA
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Patent number: 8382129Abstract: A stabilizer bar is intended for use in a vehicle, and a torsion part of the stabilizer bar is fixed to the vehicle body by a fixing member. A resin sheathing is provided integrally on an outer peripheral surface of the stabilizer bar. The fixing member is composed of the sheathing, a rubber bush disposed on the outer periphery of the sheathing, and a mounting fixture for mounting the rubber bush on the vehicle body side so as to cover the outer periphery of the rubber bush. The sheathing and the rubber bush are immovably assembled to each other. Thus, there may be provided a vehicle stabilizer, highly durable, easily mountable and replaceable, low-cost, and highly operable.Type: GrantFiled: May 14, 2012Date of Patent: February 26, 2013Assignees: NHK Spring Co., Ltd., NHK International CorporationInventors: Hironobu Sugiura, Shigeru Kuroda, Kiyoshi Kurimoto, Yurika Goto, Shinichi Nishizawa
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Publication number: 20120223499Abstract: A stabilizer bar is intended for use in a vehicle, and a torsion part of the stabilizer bar is fixed to the vehicle body by a fixing member. A resin sheathing is provided integrally on an outer peripheral surface of the stabilizer bar. The fixing member is composed of the sheathing, a rubber bush disposed on the outer periphery of the sheathing, and a mounting fixture for mounting the rubber bush on the vehicle body side so as to cover the outer periphery of the rubber bush. The sheathing and the rubber bush are immovably assembled to each other. Thus, there may be provided a vehicle stabilizer, highly durable, easily mountable and replaceable, low-cost, and highly operable.Type: ApplicationFiled: May 14, 2012Publication date: September 6, 2012Applicants: NHK INTERNATIONAL CORPORATION, NHK SPRING CO., LTD.Inventors: Hironobu Sugiura, Shigeru Kuroda, Kiyoshi Kurimoto, Yurika Goto, Shinichi Nishizawa
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Patent number: 7606690Abstract: A method for modeling a coil spring on a suspension system in terms of derived torque and force characteristics of the spring comprising the steps of providing a force field generator for simulating the spring, securing the force field generator to the suspension system, activating the force field generator to produce forces for characterizing the spring, measuring the forces; and deriving a spring design based upon the measured forces.Type: GrantFiled: March 4, 2002Date of Patent: October 20, 2009Assignee: NHK International CorporationInventors: Shinichi Nishizawa, Akihiko Kumagai