Patents Assigned to JTEKT
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Patent number: 10704650Abstract: A cycloidal gear pair reducer including an input shaft, mounted in a reducer casing such that it rotates about an axis referred to as “main axis”, an eccentric member carried by the input shaft and rotated by the latter, at least one cycloidal disc rotatably mounted on the eccentric member and having a cycloidal toothing, at least one ring gear provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and an output shaft, separate from the input shaft, arranged to be rotated by the cycloidal disc; the cycloidal toothing of the disc and the corresponding receiving toothing of the ring gear being helical.Type: GrantFiled: April 21, 2017Date of Patent: July 7, 2020Assignee: JTEKT EUROPEInventors: Laurent Rey, Jean-Michel Saniez
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Patent number: 10703407Abstract: When a steering angle reaches a first value close to a second value that defines a boundary of the maximum physical range of operation of a steering wheel, an ECU calculates a virtual end controlled variable that sharply increases a steering torque. The ECU calculates a second limit on the virtual end controlled variable and calculates a final limit (upper and lower limits) on an assist controlled variable by taking into account the second limit. When performing virtual end control, the ECU calculates the final limit on the assist controlled variable by using, as a first limit corresponding to the steering torque, a previous value held by upper and lower limit holders, instead of a present value calculated in accordance with the steering torque in a present calculation cycle.Type: GrantFiled: March 28, 2018Date of Patent: July 7, 2020Assignee: JTEKT CORPORATIONInventor: Shingo Maeda
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Publication number: 20200207400Abstract: A steering system includes a rod member, a housing, and a clamping member. The housing has a clamping slit and includes a first clamp-receiving portion and a second clamp-receiving portion that project so as to sandwich the clamping slit therebetween. The clamping member includes a fixed cam, a clamping shaft, a rotary cam, and a clamping lever. The fixed cam is fitted in the first clamp-receiving portion from an outer side of the first clamp-receiving portion. The fixed cam has a third through hole extending through the fixed cam coaxially with a first axis. The third through hole has a small diameter portion at a first portion close to the rotary cam and a large diameter portion having a diameter larger than a diameter of the small diameter portion at a second portion away from the rotary cam.Type: ApplicationFiled: November 18, 2019Publication date: July 2, 2020Applicant: JTEKT CORPORATIONInventors: Masayoshi SAKUDA, Daiki GOTO, Kazuki FUJIWARA, Akihiro TANIYAMA, Shoin KUME, Syunya KOUKETSU
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Publication number: 20200208735Abstract: A plug for closing an opening of a casing, the plug including a solid hub, with central axis, as well as a retaining member which ensures the axial attachment of the plug in the opening, the plug including a play-compensating carriage, which is distinct from the hub and which is movably mounted on a guiding support borne by the hub, the guiding support being arranged in such a way as to axially retain the carriage and to guide the relative movement of the carriage with respect to the hub in a direction termed the “play-compensating direction” transverse to the central axis, a spring-type resilient member, arranged between the guiding support and the carriage, and an orientating member arranged so as to orientate the plug, and consequently the play-compensating direction defined by the guiding support, in azimuth around the central axis, according to a predetermined orientation with respect to the casing.Type: ApplicationFiled: May 25, 2018Publication date: July 2, 2020Applicant: JTEKT EUROPEInventor: Mickael GUERIN
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Publication number: 20200206804Abstract: A method of manufacturing an outside joint member, the outside joint member including a cup portion in a bottomed tubular shape and a shaft portion that is a shaft-like portion extending from a bottom portion of the cup portion and that has a spline shaft having an outer peripheral surface on which spline teeth are formed, includes forging a forming material to form a shape of the cup portion and a shape of the spline shaft on the shaft portion simultaneously using a forging die.Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Applicant: JTEKT CORPORATIONInventors: Yohei Fukumoto, Motonori Nakao, Kenichi Kurisu, Shuhei Fukuda, Kazuya Matsumoto
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Publication number: 20200208729Abstract: A gear unit includes: a first gear and a second gear which are disposed about a first axis; an input shaft disposed so as to be rotatable about the first axis; and an intermediate gear disposed between the first gear and the second gear. The intermediate gear is disposed about a second axis tilted with respect to the first axis. The intermediate gear includes an inner ring portion and an outer ring portion disposed so as to be rotatable relative to the inner ring portion. The inner ring portion is configured to be rotated with rotation of the input shaft. The outer ring portion is configured to mesh with the first gear and the second gear.Type: ApplicationFiled: December 16, 2019Publication date: July 2, 2020Applicant: JTEKT CORPORATIONInventor: Takashi TASHIRO
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Publication number: 20200207410Abstract: A control device for a vehicle according to the disclosure is provided. The vehicle includes a steering device, a braking and driving force generation device, a steered angle state quantity sensor and a vehicle wheel speed sensor. The control device includes an electronic control unit configured to control an operation of the braking and driving force generation device, to calculate an actual traveling direction which is an actual direction of travel of the vehicle, based on the vehicle wheel speed of each of the right and left steered wheels and the steered angle state quantity, and to cause the actual traveling direction to follow a target traveling direction which is a target direction of travel of the vehicle.Type: ApplicationFiled: December 23, 2019Publication date: July 2, 2020Applicant: JTEKT CORPORATIONInventor: Yasuharu YAMAMOTO
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Publication number: 20200206998Abstract: To provide a quality prediction system predicting a quality element of a molded item using machine learning. The quality prediction system includes a sensor disposed in the mold and configured to detect state data regarding the molten material supplied in the cavity, a learned-model storage unit configured to store a model which is a learned model generated by machine learning in which the state data detected by at least the sensor is used as a training data set and is a learned model related to the state data and a quality element of the molded item, and a quality prediction unit configured to predict the quality element of the molded item which is newly molded based on the state data newly detected by the sensor and the learned model.Type: ApplicationFiled: December 23, 2019Publication date: July 2, 2020Applicant: JTEKT CorporationInventors: Masaharu HASUIKE, Yusuke OKUBO, Toshiyuki BABA, Kouji KIMURA
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Publication number: 20200207404Abstract: An auxiliary power supply device includes an auxiliary power source and a booster circuit. The auxiliary power supply device is configured to be switched among a charging state, a holding state, and a discharging state. The auxiliary power source is configured to be switched between a serial connection mode and a parallel connection mode. The auxiliary power source is configured to perform boosting to supply power to the power supply target when the auxiliary power source is switched to the serial connection mode, and perform backup when the auxiliary power source is switched to the parallel connection mode.Type: ApplicationFiled: December 17, 2019Publication date: July 2, 2020Applicant: JTEKT CORPORATIONInventors: Toyoki SUGIYAMA, Satoshi SHINODA
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Patent number: 10696323Abstract: A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor so as to control a current flowing through the motor to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor when the end determination processing portion determines that the turning angle has reached the limit angle.Type: GrantFiled: August 11, 2017Date of Patent: June 30, 2020Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Takahiro Toko, Hiromasa Tamaki, Jun Hasegawa, Shohei Fujita, Kohei Yanai, Tatsuya Suzuki, Tatsuya Miyake, Takashi Suzuki
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Publication number: 20200198694Abstract: A steering system includes a prioritized torque sensor, a redundant torque sensor, a controller, a first signal line, a second signal line, and a common signal line. Each of the first signal line and the second signal line connects the prioritized torque sensor and the controller. The common signal line connects the redundant torque sensor and the controller. The prioritized torque sensor is configured to transmit, via the first signal line, a first prioritized detection signal. The prioritized torque sensor is configured to transmit, via the second signal line, a second prioritized detection signal. The redundant torque sensor is configured to transmit, via the common signal line, a first redundant detection signal and a second redundant detection signal.Type: ApplicationFiled: December 10, 2019Publication date: June 25, 2020Applicant: JTEKT CORPORATIONInventors: Hiroshi KAWAMURA, Yuji FUJITA
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Publication number: 20200198686Abstract: A steering apparatus includes: a column shaft; a column tube supporting the column shaft; a housing movably supporting the column tube; a fastener configured to fix the position of the column tube by pressing on radial ends of the housing; a first impact absorber configured to generate a first dynamic friction force with the column tube; and a second impact absorber configured to generate a second dynamic friction force with the housing during a secondary collision by being moved by the first impact absorber. The first impact absorber is structured such that a distal static friction coefficient in a distal region located further from a squeezing portion of the fastener is less than a proximal static friction coefficient in a proximal region closer to the squeezing portion.Type: ApplicationFiled: November 18, 2019Publication date: June 25, 2020Applicant: JTEKT CORPORATIONInventors: Satoshi ABE, Yoshitaka MIYANAGA, Norihito TANAKA, Satoshi MATOBA
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Publication number: 20200198695Abstract: A motor controller is configured to control a motor including a plurality of winding groups. The motor controller includes a plurality of processors. Each of the processors is configured to independently control supply of driving electric power to each of the winding groups. When an abnormality occurs in which a torque to be generated in one of the winding groups is smaller than an individual rated torque and when a target overall torque is larger than a total of the individual rated torque for the winding group in which the abnormality does not occur, the processor, controlling supply of driving electric power to the winding group in which the abnormality does not occur, out of the plurality of processors controls supply of the driving electric power such that the winding group generate a torque larger than the individual rated torque.Type: ApplicationFiled: December 19, 2019Publication date: June 25, 2020Applicant: JTEKT CORPORATIONInventors: Hiroshi KAWAMURA, Yuji FUJITA
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Publication number: 20200200224Abstract: A method of manufacturing a constituent member of a constant-velocity joint includes: performing plastic working; and performing hardening of a material. The plastic working is performed with a material of the constituent member heated to a predetermined working temperature range. The hardening of the material is performed by utilizing heat applied for heating to the working temperature range in performing the plastic working as heat for the hardening of the material and cooling the material after performing the plastic working.Type: ApplicationFiled: December 13, 2019Publication date: June 25, 2020Applicant: JTEKT CORPORATIONInventors: Motonori NAKAO, Yohei Fukumoto, Koji Hamajima, Keiichi Kamata, Kenjiro Ikeda, Shintaro Yoshinaga
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Publication number: 20200198696Abstract: In a control device for a steering mechanism, the steering mechanism includes a motor that includes a plurality of coils. The plurality of coils include a first coil and a second coil. The control device includes a first control system and a second control system configured to compute a command value for torque of the motor to be applied to the steering mechanism. The first control system and the second control system are each configured to control power supply to the plurality of coils of the motor based on the command value. The first control system includes a first microcomputer that has first characteristics, and the second control system includes a second microcomputer that has second characteristics that are different from the first characteristics.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Applicant: JTEKT CORPORATIONInventors: Hiroshi KAWAMURA, Yuji FUJITA
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Publication number: 20200189092Abstract: An assist device includes body gear, an actuator unit, an angle detector, a torque detector, a load detector, and a controller. The angle detector is configured to detect a forward leaning angle of the hips of a person relative to his or her thighs. The torque detector is configured to detect a torque-related amount related with a torque based on the forward leaning angle. The load detector is configured to detect a load-related amount based on either a baggage mass or a baggage weight. The controller is configured to calculate the assisting torque based on the torque-related amount and the load-related amount. The controller is configured to control the actuator unit based on the assisting torque.Type: ApplicationFiled: December 10, 2019Publication date: June 18, 2020Applicant: JTEKT CorporationInventors: Yoshitaka YOSHIMI, Toshiki KUMENO
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Publication number: 20200189015Abstract: A gear cutting tool configured to machine a workpiece with a skiving so as to generate a gear tooth includes a ring-shaped tool main body, and a plurality of tool blades which are replaceable and attached to the tool main body, such that the tool blades are arranged in a circumferential direction of the tool main body and a blade tip of each of the tool blades is oriented inward in a radial direction of the tool main body. Since the gear cutting tool for skiving is an internal gear type tool, the accuracy and the tool life of external gear machining when using the internal gear type tool are higher and longer than the accuracy and the tool life of external gear machining when using an external gear type tool. As a result, the frequency of replacement of the tool blades can be lowered and cost can be reduced.Type: ApplicationFiled: December 11, 2019Publication date: June 18, 2020Applicant: JTEKT CorporationInventors: Takuya NAKAYAMA, Minoru SATO
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Patent number: 10683031Abstract: A rack-parallel steering system that prevents entry of abrasion powder into a rolling bearing is provided. A steering system includes a steered shaft, a rolling element screw portion, a rolling element nut, and a ball screw device. The steering system includes: a motor including an output shaft offset from the steered shaft; a drive force transfer mechanism including a toothed drive pulley, a toothed driven pulley, and a toothed belt; and a rolling bearing supporting a ball screw nut to be rotatable relative to a housing. A first seal member that contacts an outer ring and an inner ring is provided on a side surface of the rolling bearing on the driven pulley side. A second seal member that does not contact the inner ring is provided on a side surface of the ball bearing on the side opposite to the side surface on the driven pulley side.Type: GrantFiled: October 24, 2017Date of Patent: June 16, 2020Assignee: JTEKT CORPORATIONInventors: Yoshio Kondo, Masashi Yamaguchi
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Patent number: 10683919Abstract: In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.Type: GrantFiled: December 21, 2017Date of Patent: June 16, 2020Assignee: JTEKT CORPORATIONInventors: Gento Aramoto, Naoko Sakaguchi
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Patent number: 10686624Abstract: A communication system includes: an information acquisition unit that acquires node information, which indicates the presence or absence of the execution of a reissuing process by communication processing nodes, for a plurality of switching processes in the case where a switching process has been executed once each for all of communication lines; and a system information generation unit that generates system information, which indicates the system of a communication network, on the basis of a plurality of pieces of node information that have been acquired.Type: GrantFiled: November 7, 2016Date of Patent: June 16, 2020Assignee: JTEKT CORPORATIONInventors: Terukazu Senda, Satoshi Kato
