Patents Assigned to JTEKT
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Patent number: 8818549Abstract: A controller including a detecting member detecting a machining position where a pivoting axis is reversed in machining by the machine tool based on the control data, an allowable position error setting member setting an allowable position error between a commanded machining position and an actual machining position, an allowable acceleration deciding member deciding the allowable acceleration about the pivoting axis based on a distance from the machining position of the reversed axis to a center of the pivoting axis and based on the allowable position error being set, and a controlling member controlling a velocity about the driving axis based on the allowable acceleration.Type: GrantFiled: August 10, 2010Date of Patent: August 26, 2014Assignee: JTEKT CorporationInventors: Yoshihiko Yamada, Atsushi Saito
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Publication number: 20140230249Abstract: A method for manufacturing a vehicle bearing apparatus includes a method for manufacturing a hub ring. The hub ring includes a seal facing surface, a flange portion, and a shaft body portion. The flange portion includes a thin portion, a thick portion, bolt holes, a thin portion outer surface, a thick portion outer surface, and bolts. The flange portion protrudes outward from the shaft body portion. The thick portion is formed on an outer side with respect to the bolt holes in the flange portion, and the thin portion is formed on an inner side with respect to the thick portion in the flange portion. In the method for manufacturing the hub ring, machining is performed on the thick portion outer surface by using the seal facing surface subjected to grinding, as a reference surface, after the bolts are fitted into the flange portion.Type: ApplicationFiled: February 10, 2014Publication date: August 21, 2014Applicant: JTEKT CORPORATIONInventors: Kenichi MORITA, Yuu KATSUYAMA, Ryoichiro KOTANI, Hiroyoshi KOMATSU, Toru SASAKI
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Patent number: 8806962Abstract: A torque detection device includes: a magnetic flux collecting unit, and a sensor housing. The magnetic flux collecting unit includes a holder, first and second magnetic flux collecting rings, and a magnetic shield. The holder has upper and lower through-holes. The first and second magnetic flux collecting rings are fitted to an inner periphery of the holder. The magnetic shield is fitted to an outer periphery of the holder so as to cover the through-holes. The sensor housing is formed integrally with the magnetic flux collecting unit by supplying resin onto an outer periphery of the magnetic flux collecting unit. The holder has a resin flow passage in its outer periphery. Resin that is supplied at the time of forming the sensor housing flows into the through-holes through the resin flow passage.Type: GrantFiled: January 17, 2013Date of Patent: August 19, 2014Assignee: JTEKT CorporationInventors: Yasushi Shidahara, Akihiro Takeuchi, Genki Nishikawa
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Patent number: 8808098Abstract: A constant velocity joint including an outer race including a plurality of outer race ball grooves on an internal surface thereof; an inner race arranged inside the outer race and including a plurality of inner race ball grooves on a peripheral surface thereof; a plurality of balls respectively received in the outer and inner race ball grooves for transmitting a torque between the outer race and the inner race; and a cage arranged between the outer and inner races and including a plurality of window portions that respectively receive balls in a circumferential direction thereof. On at least one of a plurality of groove wall protrusions that are configured by sidewall surfaces of the inner race ball grooves adjoining cutouts are respectively formed on axially opposite sides of an inner race on a peripheral side of the inner race.Type: GrantFiled: July 4, 2011Date of Patent: August 19, 2014Assignee: JTEKT CorporationInventors: Yuri Handa, Satoshi Suzuki
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Publication number: 20140225469Abstract: A magnet embedded rotor configured such that the magnetization ratio of field permanent magnets is improved is provided. The magnet embedded rotor includes a first annular core in which first permanent magnets are embedded, and a second annular core in which second permanent magnets, which are independent from the first permanent magnets, are embedded. The magnet embedded rotor has a structure in which the second annular core is fitted onto the outer periphery of the first annular core. The first permanent magnets and the second permanent magnets constitute field permanent magnets.Type: ApplicationFiled: February 6, 2014Publication date: August 14, 2014Applicant: JTEKT CORPORATIONInventors: Hiroshi YOSHIKAWA, Akira HIRAMITSU
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Publication number: 20140225043Abstract: A production apparatus for an electric storage material includes a dissolution device that dissolves a thickener in a solvent by applying vibration to the solvent, and a kneading device that kneads a solution of the thickener having an adjusted viscosity and an active substance. The thickener is dissolved in the solvent, and a powder of the active substance and the like are dispersed and kneaded in the solution of the thickener having the adjusted viscosity. Thus, kneading can be performed in a short time, and damage to the active substance can be suppressed.Type: ApplicationFiled: February 4, 2014Publication date: August 14, 2014Applicant: JTEKT CorporationInventors: Takumi MIO, Koji Nishi, Junya Fujita, Yoshifumi Fukaya, Takafumi Fujii, Kazuya Suzuki
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Patent number: 8800397Abstract: Temperatures of a base, a support member, and a support member are measured, and amounts of linear expansion of the base, the support member, and the support member due to temperature differences from a reference temperature are computed. An amount of linear expansion of a ball screw with respect to the support member is measured. An amount of linear expansion of a lead of the ball screw is computed based on the sum of the aforementioned amounts of linear expansion, and an amount of rotation of the ball screw is adjusted from an amount of rotation of the ball screw at the reference temperature, to an amount of rotation of the ball screw, which corresponds to the amount of linear expansion of the lead at a predetermined temperature.Type: GrantFiled: June 6, 2013Date of Patent: August 12, 2014Assignee: JTEKT CorporationInventors: Yuji Sasaki, Hideki Iwai, Kimihiro Onishi, Yasumasa Sakurai
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Patent number: 8801292Abstract: A roller bearing capable of effectively restraining occurrence of smearing or the like is provided. A cylindrical roller bearing includes: an outer ring having an outer ring raceway surface; an inner ring having an inner ring raceway surface that faces the outer ring raceway surface; and a plurality of cylindrical rollers rollably disposed between the outer ring raceway surface and the inner ring raceway surface. The inner ring raceway surface of the inner ring is provided with a manganese phosphate coating, and a rolling contact surface of each cylindrical roller is provided with a diamond-like carbon coating.Type: GrantFiled: March 16, 2012Date of Patent: August 12, 2014Assignee: JTEKT CorporationInventors: Yasuhiro Kobayashi, Ryohei Hosaka
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Patent number: 8801559Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.Type: GrantFiled: June 30, 2011Date of Patent: August 12, 2014Assignees: Toyota Jidosha Kabushiki Kaisha, Toyooki Kogyo Co., Ltd., JTEKT Corporation, Aisin AW Co., Ltd.Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
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Publication number: 20140222294Abstract: An auxiliary power supply device includes a capacitor that is connected to a main power source, and that is able to discharge an electric current to an electric motor, the main power source supplying electric power to the electric motor; and a booster circuit that boosts a voltage of the main power source and applies the boosted voltage to the auxiliary power source. An operation of the auxiliary power supply device is controlled by a control device. When supply of the electric power from the main power source to the capacitor is started in a state where a voltage across terminals of the capacitor is equal to or higher than a voltage of the main power source, the control device increases the voltage applied to the capacitor by the booster circuit as the capacitor voltage increases.Type: ApplicationFiled: January 23, 2014Publication date: August 7, 2014Applicant: JTEKT CORPORATIONInventors: Toyoki SUGIYAMA, Masayasu HIGASHI
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Publication number: 20140217940Abstract: An electric power steering apparatus includes an EPS actuator that applies assist force to a steering system, and an ECU that controls operation of the EPS actuator. The ECU includes an inverter device, a gate driver circuit, a gate driver power source, a microcomputer, and the like. The microcomputer switches assist control to assist stop control, based on an indication of a voltage decrease in the gate driver power source.Type: ApplicationFiled: October 26, 2012Publication date: August 7, 2014Applicant: JTEKT CORPORATIONInventor: Hiroshi Kawamura
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Publication number: 20140221107Abstract: One end face of an outer roller is provided with an annular rib that protrudes radially inward and that retains an inner roller and rolling elements. The other end face-side portion of the outer roller is provided with an inner component retaining portion that retains the inner roller and the rolling elements. In a roller unit in which the inner roller and the rolling elements are retained in the outer roller by the rib and the inner component retaining portion, an inner peripheral face of the inner roller through which a tripod shaft portion is passed is provided with a tripod shaft portion insertion restricting portion that allows the tripod shaft portion to be passed through the inner roller only from an end face side of the roller unit, on which the rib of the outer roller is not provided.Type: ApplicationFiled: January 31, 2014Publication date: August 7, 2014Applicant: JTEKT CorporationInventors: Koichiro MIZUNO, Keishi KOBATA
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Publication number: 20140216183Abstract: A steering system includes: pinion teeth coupled to a steering shaft to transmit steering torque; pinion teeth that transmit assist torque based on the steering torque; a rack shaft that meshes with the pinion teeth at a first meshing portion and meshes with the pinion teeth at the second meshing portion; a tubular rack housing that accommodates the rack shaft; and a rack bushing that supports the rack shaft in the rack housing. The rack busing supports the rack shaft, at a position between the first meshing portion and the second meshing portion.Type: ApplicationFiled: January 30, 2014Publication date: August 7, 2014Applicant: JTEKT CORPORATIONInventor: Yohei NAKAYAMA
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Patent number: 8798861Abstract: An electric power steering system includes: a shaft angle sensor that outputs a signal indicating a rotation angle of a shaft through which a turning operation force is transmitted to a steering mechanism; a motor angle sensor that outputs a signal indicating a rotation angle of a motor; and a control section that determines the number of turns of the steering wheel based on both outputs of the shaft angle sensor and the motor angle sensor, wherein when it is required to determine the number of turns, the control section detects an angle error between the outputs of the shaft angle sensor and the motor angle sensor based on the outputs thereof and when the angle error falls within a predetermined allowable range, the control section determines the number of turns, and when the angle error is out of this range, the control section avoids determining the number of turns.Type: GrantFiled: October 2, 2009Date of Patent: August 5, 2014Assignee: JTEKT CorporationInventor: Takashi Mitsuhara
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Publication number: 20140209403Abstract: In a vehicle steering system provided in a vehicle in which a high-voltage battery is provided, a clutch mechanism is mechanically disconnected and the intermediate shaft falls, after a collision of the vehicle is detected. An ECU detects the collision of the vehicle based on an acceleration that is input, and then detects contraction of the column shaft and disconnection of the clutch mechanism based on an ON signal of a microswitch. Thereafter, the ECU is able to continue to rotationally drive an electric motor based on a steering angle signal that is output from a steering angle sensor provided on the column shaft, and that is electrically insulated through a photo coupler, and thus the ECU causes the vehicle to travel and stop.Type: ApplicationFiled: January 16, 2014Publication date: July 31, 2014Applicant: JTEKT CORPORATIONInventor: Shohei OGI
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Publication number: 20140212593Abstract: A method of manufacturing a spline telescopic shaft, includes a sliding step of sliding in an axial direction an inner shaft manufacturing intermediate member and an outer shaft manufacturing intermediate member, in one of which a resin coating is disposed on splines. In the sliding step, a sliding load of the inner shaft manufacturing intermediate member and the outer shaft manufacturing intermediate member is detected, and sliding is ended at a timing when the detected sliding load reaches a threshold load which is determined based on an initial sliding load detected at a start of the sliding.Type: ApplicationFiled: January 22, 2014Publication date: July 31, 2014Applicants: KOYO MACHINE INDUSTRIES CO., LTD., JTEKT CORPORATIONInventors: Naoto MIYAWAKI, Kenji HIGASHI, Masanori KOBAYASHI, Shoji SASAKI, Seijun INOUE, Yoshinobu OGURA
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Publication number: 20140213147Abstract: In a measuring method in which a sizing device is activated only for a prescribed measurement time (t1) to carry out measurement in a main process that is repeated with a period of a prescribed process time (t0), there are stored an activation drift that is a drift of a measured value after activation of the sizing device and a deactivation drift that is a fluctuation in drifts among different elapsed times, each of the drift being measured when the sizing device is activated after a predetermined time has elapsed since the sizing device is deactivated. A measurement drift section is determined.Type: ApplicationFiled: January 24, 2014Publication date: July 31, 2014Applicant: JTEKT CorporationInventors: Okitsugu TANAKA, Yutaka MURAKOSHI
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Patent number: 8791659Abstract: A F/B gain control unit computes a first change component by executing torque feedback control based on a torque deviation using a feedback gain that is computed by a F/B gain variable control unit. The F/B gain variable control unit computes one of two different feedback gains that correspond to a “first computation mode” in which the first change component is used as an addition angle and a “second computation mode” in which a value obtained by correcting the first change component by an estimated motor rotation angular velocity is used as the addition angle, respectively. A feedback gain used in the first computation mode is set such that a response at the feedback gain is higher than that at a feedback gain used in the second computation mode.Type: GrantFiled: August 9, 2012Date of Patent: July 29, 2014Assignee: JTEKT CorporationInventors: Isao Namikawa, Terutaka Tamaizumi, Yuji Kariatsumari
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Patent number: 8790095Abstract: An electric pump unit includes: a unit housing; a bearing unit provided within the unit housing; a rotary portion; and a motor stator fixed to the unit housing. The rotary portion includes: a pump driving motor shaft supported by the bearing unit such that an axial position of a center of gravity of the rotary portion falls within an axial range of the bearing unit, and a motor rotor. The motor rotor includes: a disc portion which extends radially outwards from an axial end portion of the motor shaft; and a cylindrical portion which extends from an outer circumferential portion of the disc portion towards the other axial end side and surrounds an outer circumference of the bearing unit.Type: GrantFiled: October 14, 2009Date of Patent: July 29, 2014Assignee: JTEKT CorporationInventors: Takatoshi Sakata, Akihiko Kawano, Hiroki Kagawa
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Patent number: 8790019Abstract: A cage used in a large-size rolling bearing is formed of a plurality of cage segments having a circular-arc shape and arranged in a circular pattern. Each cage segment includes rims opposed to each other and separated from each other at a predetermined interval, and a plurality of cage bars that extend from one of the rims to the other rim and that define pockets which accommodate the rollers and which are arranged in the circumferential direction. Multiple pairs of hook portions, between which the inner ring is sandwiched, are formed so as to project from the rims, and are arranged at predetermined intervals in the circumferential direction. Distal ends of the hook portions are engaged with annular grooves formed in end portions of the inner ring so as be rotatable relative to the inner ring.Type: GrantFiled: May 14, 2013Date of Patent: July 29, 2014Assignee: JTEKT CorporationInventor: Hideki Fujiwara
