Patents Assigned to JTEKT
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Publication number: 20130062929Abstract: A hub unit includes a rolling bearing and a flange integrally formed with a hub wheel that may function as a bearing ring member of the rolling bearing. The flange has a plurality of thick portions formed at predetermined intervals in the circumferential direction of the flange. Each thick portion has a bolt hole that extends through the corresponding thick portion in the thickness direction of the thick portion. Work holes through which a working tool is able to be inserted and which extend through the flange in the thickness direction of the flange are formed between the bolt holes adjacent to each other in the circumferential direction. A circumferential width of each thick portion that has the bolt hole and that is adjacent to the work holes in the circumferential direction is set to such a width dimension that the thick portion does not interfere, with the adjacent work holes.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: JTEKT CORPORATIONInventor: Takaaki ONIZUKA
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Publication number: 20130062886Abstract: A power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: JTEKT CORPORATIONInventors: Hideki FUJIWARA, Masaaki OHTSUKI
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Publication number: 20130063062Abstract: An electric power steering system includes short-circuit determination means for determining whether a short-circuit between an energization failure phase and one of the two phases other than the energization failure phase has occurred while assist force is being generated using the two phases other than the energization failure phase as energization phases. When the short-circuit determination means determines that the short-circuit has occurred, generation of the assist force is stopped.Type: ApplicationFiled: September 4, 2012Publication date: March 14, 2013Applicant: JTEKT CORPORATIONInventors: Hidenori ITAMOTO, Hirozumi EKI, Gempei NAKASONE
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Publication number: 20130064616Abstract: At a contact step in a tool radius adjusting method, a reference portion of a movable body provided radially movably on a housing of a boring tool and a position adjusting reference member fixed on a machine tool are brought into contact by sliding the movable body relative to the housing so that the position of a cutting blade comes to a predetermined position in a direction to go away from a rotational axis. Then, at an adjusting step, the position of the cutting blade relative to the rotational axis is adjusted by changing the relative position between a tool spindle holding the boring tool and the position adjusting reference member in a direction to come close to each other by drive mechanisms of the machine tool used for positioning a spindle head with the tool spindle relative to a workpiece in machining the workpiece with the cutting blade.Type: ApplicationFiled: November 10, 2010Publication date: March 14, 2013Applicant: JTEKT CorporationInventors: Eiji Nakamura, Akihiko Kadota, Takashi Yokoyama, Yasuhiro Komai, Harumi Sawaki, Shun Sawaki, Aya Sawaki, Taku Sawaki
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Publication number: 20130066521Abstract: In a control unit for a vehicle steering system, which controls an electric motor that is used to change a steering angle on the basis of a target route for a vehicle, a turning angle of a steered wheel with respect to a central axis of a shock absorber is set as a steered element angle, and the steered element angle is used in control over the electric motor.Type: ApplicationFiled: September 4, 2012Publication date: March 14, 2013Applicant: JTEKT CORPORATIONInventors: Takeshi WATANABE, Atsushi ISHIHARA, Hiroshi YOSHIMOTO
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Publication number: 20130065722Abstract: A cage of each of ball bearings arranged on respective outer peripheries of eccentric portions of a motor shaft has an annular base portion interposed between an inner ring and an outer ring and a plurality of partition wall portions for forming pockets together with the base portion. In a first ball bearing, part of the base portion protrudes axially outward from the inner raceway and forms an oil receiving portion that receives lubricating oil from the second rolling bearing side, at a portion around the rotation axis and axially outward of the first rolling bearing.Type: ApplicationFiled: September 5, 2012Publication date: March 14, 2013Applicant: JTEKT CorporationInventors: Keita NOMURA, Hiroshi Takuno, Takeshi Yamamoto
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Publication number: 20130064601Abstract: An annular groove is formed at an open end of a motor case, and a sliding contact projection, which is in an annular plate-shape and corresponding to the annular groove, is formed on a cover. A bottom of the annular groove and the sliding contact projection rotate relative to each other while being in sliding contact with each other to form an annular friction bonded portion therebetween. Wall portions of the annular groove are arranged at such positions as to be concentric with the friction bonded portion. Thus, a storage portion that stores burrs produced at the friction bonded portion is formed. A plurality of protrusions that protrude radially outward is formed on the sliding contact projection over all around. The storage portion is partitioned in the circumferential direction by using the protrusions as partitioning elements.Type: ApplicationFiled: September 4, 2012Publication date: March 14, 2013Applicant: JTEKT CORPORATIONInventor: Yuichi TOYAMA
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Patent number: 8393801Abstract: An outer ring has a tapered tubular portion having a tapered raceway surface, a small diameter side extension portion that extends radially outward from a small diameter side edge of the tapered tubular portion, and a large diameter side extension portion that extends from a large diameter side edge of the tapered tubular portion in a direction away from the axis of the outer ring. The small diameter side extension portion and the large diameter side extension portion are larger in thickness than the tapered tubular portion.Type: GrantFiled: November 25, 2011Date of Patent: March 12, 2013Assignee: Jtekt CorporationInventors: Kazuki Hamada, Hiroshi Ueno, Isao Usuki, Hironori Hiraoka
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Publication number: 20130059093Abstract: The coated member production method includes a DLC film forming step of introducing a feedstock gas containing a carbon compound and an oxygen-containing organic silicon compound into a treatment chamber in which a base is accommodated, and applying a voltage to the base at a treatment pressure of not lower than 100 Pa and not higher than 400 Pa to generate plasma to form a DLC film on a surface of the base. Hexamethyldisiloxane, for example, is used as the oxygen-containing organic silicon compound. A DC pulse voltage, for example, is applied to the base in the DLC film forming step.Type: ApplicationFiled: May 12, 2011Publication date: March 7, 2013Applicant: JTEKT CORPORATIONInventors: Masahiro Suzuki, Kazuyoshi Yamakawa, Toshiyuki Saito
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Publication number: 20130056321Abstract: A driving force transmission apparatus includes: a first cam mechanism that converts rotational force from a housing into first cam thrust force used as clutch force of a main clutch when the first cam mechanism is actuated through clutch action of a pilot clutch; and a second cam mechanism that is actuated prior to conversion of the rotational force into the first cam thrust force by the first cam mechanism, and that generates second cam thrust force for reducing an interval between clutch plates of the main clutch. The second cam mechanism includes an input cam member that rotates upon receiving rotational force used as actuating force of the input cam member from a cam actuating driving source, and an output cam member that generates the second cam thrust force between the output cam member and the input cam member and outputs the second cam thrust force.Type: ApplicationFiled: August 22, 2012Publication date: March 7, 2013Applicant: JTEKT CORPORATIONInventors: Noriyuki FUJII, Hiroshi TAKUNO, Kunihiko SUZUKI, Yuji TSUZUKI
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Patent number: 8388487Abstract: A differential apparatus has a planet carrier 2A rotated by driving torque from a driving source, a planetary gear 2B rotated for self-rotation around its own axis by receiving rotational force of the planet carrier 2A, a sun gear 2C and an internal gear 2D differentially distributing the rotational force to a pair of output shafts by receiving the rotational force of the planet carrier 2A from the planetary gear 2B, and a differential restricting mechanism 2 having an inner clutch plates 3A and an outer clutch plates 3B restricting a differential of the differential mechanism 3. The planet carrier 2A is disposed between the sun gear 2C and the internal gear 2D, and the sun gear 2C and internal gear 2D are respectively connected each other to be able to transmit torque through the inner clutch plates 3A and the outer clutch plates 3B.Type: GrantFiled: May 27, 2009Date of Patent: March 5, 2013Assignee: JTEKT CorporationInventors: Noriyuki Fujii, Makoto Nishiji, Kunihiko Suzuki
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Publication number: 20130047375Abstract: A roller is essentially consisting of a resin composition that contains, as a base resin, a copolymer essentially consisting of a repeating unit expressed by a formula (i): where “a” denotes a number from 4 to 9, a repeating unit expressed by a formula (ii): and a repeating unit expressed by a formula (iii): where “b” denotes a number from 9 to 11, the roller being formed in an annular shape. In a roller device, the roller is arranged to cover an outer periphery of an outer ring of a rolling bearing that includes an inner ring, the outer ring, and rolling elements.Type: ApplicationFiled: August 21, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventor: Kazunori MIYAKE
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Publication number: 20130051901Abstract: In a shaft coupling structure, a lower joint yoke has a slit that axially extends from its open end portion, and a guide cover is fitted around an input shaft so as to be rotatable together with the input shaft. The guide cover is formed of a guide portion that protrudes radially outward from the input shaft and that is engageable with the slit of the lower joint yoke, and a cover portion that covers an opening portion of a valve housing and that is fitted around the input shaft. The guide portion and the cover portion are formed integrally with each other.Type: ApplicationFiled: July 17, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventor: Takumitsu OTANI
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Publication number: 20130048412Abstract: A torque sensor and an electric motor are supported by a steering column by which a steering shaft is rotatably supported. On a control board on which a control circuit that controls driving of an electric motor is mounted, a first terminal group and a second terminal group that are selectively connected to the torque sensor are respectively provided at a first end portion and a second end portion in a first direction parallel to a central axis of the steering shaft. A third terminal group that is connectable to the electric motor is provided at one end portion (third end portion) in a second direction perpendicular to the first direction.Type: ApplicationFiled: July 23, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventor: Yoshikazu KUROUMARU
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Publication number: 20130054104Abstract: A drive system for a four-wheel drive vehicle, the drive system being mounted in a four-wheel drive vehicle that includes front wheels serving as main drive wheels and rear wheels serving as auxiliary drive wheels, includes: a propeller shaft that transmits the driving force from the engine side to the rear wheels side; a dog clutch that is able to interrupt torque transmission between the engine and the propeller shaft; a torque coupling that is able to interrupt torque transmission between the propeller shaft and the rear wheels; and an ECU that interrupts both torque transmissions by the dog clutch and the torque coupling when the vehicle speed is higher than or equal to a predetermined speed.Type: ApplicationFiled: July 18, 2012Publication date: February 28, 2013Applicant: JTEKT CorporationInventors: Tomoki OGAWA, Tomoo Suzuki
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Publication number: 20130047451Abstract: A reference setting tool for measuring a shape of a side face spline is used to measure the shape of driven teeth that are formed on an axial end face of a vehicle hub unit and that are meshed with drive teeth of a constant velocity joint. The reference setting tool includes: reference teeth that are formed so as to be aligned along a circular ring and so as to have the same shape as the drive teeth of the constant velocity joint; and a reference surface that has a predetermined correlation with the reference teeth, and that is used to set a reference position for measuring the shape of the driven teeth with the reference teeth in mesh with the driven teeth.Type: ApplicationFiled: July 31, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventor: Masashi KOUMOTO
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Publication number: 20130049652Abstract: 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: ApplicationFiled: August 9, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventors: Isao NAMIKAWA, Terutaka TAMAIZUMI, Yuji KARIATSUMARI
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Publication number: 20130053155Abstract: A wheel supporting device includes: a hub unit that has a rotary ring having a first spline on its axially inner end face; and a joint that has an outer ring having a second spline, meshing with the first spline, on its axially outer end face. At least one projection included in a plurality of projections of the first spline projects in the axial direction by a larger amount than the remaining projections of the first spline. When a crest of the at least one projection contacts a crest of one of projections of the second spline, a play is caused between the rotary ring and the outer ring due to the at least one projection that works as a fulcrum.Type: ApplicationFiled: July 31, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventors: Hajime WATANABE, Toshihiro HAKATA, Shinichi MIZUTA
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Publication number: 20130052058Abstract: A pump body is formed of a pump housing and a pump plate provided in front of the pump housing. A motor housing is fixed to a rear end of the pump housing, and accommodates a pump driving electric motor. A bearing device that supports a motor shaft includes a first bearing that is arranged in a closed-end hole formed in a rear face of the pump plate and supporting a front end portion of the motor shaft, and a second bearing that is arranged radially inward of a cylindrical bearing support portion formed in the pump housing and extending inside the motor housing and that supports a middle portion of the motor shaft. A pump rotor is arranged between the first bearing and the second bearing.Type: ApplicationFiled: August 29, 2012Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventors: Nobutsuna MOTOHASHI, Takafumi UEMOTO
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Publication number: 20130049741Abstract: A resolver includes three resolver coils, which are arranged spaced apart in a circumferential direction of a rotor, and an excitation coil that generates a magnetic field to induce voltages in the resolver coils when receiving electric power. When the magnetic fields provided from the excitation coil to the three resolver coils are changed through rotation of the rotor, the voltages induced in the resolver coils are changed. This causes each of the three resolver coils to output three-phase signals having amplitude that changes in a sinusoidal manner with respect to the rotational angle of the rotor. The angular intervals between the corresponding adjacent pairs of the first to third resolver coils in the circumferential direction of the rotor are defined as first, second, and third division angles. Specifically, the first to third division angles are set to values different from one another.Type: ApplicationFiled: December 16, 2011Publication date: February 28, 2013Applicant: JTEKT CORPORATIONInventor: Hiroshi KICHISE
