Patents Assigned to JTEKT
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Patent number: 9199526Abstract: A vehicle includes: a pair of front wheels; a pair of rear wheels; a front-wheel motor configured to drive the front wheels; a rear-wheel motor configured to drive the rear wheels; and a reducer configured to reduce a rotation speed of one of the front-wheel motor and the rear-wheel motor, and transmit drive power to the wheels driven by one of the motors. The one of the front-wheel motor and the rear-wheel motor is a motor with a rotation speed higher and torque lower than those of the other one of the motors.Type: GrantFiled: February 21, 2014Date of Patent: December 1, 2015Assignee: JTEKT CORPORATIONInventors: Yasuhiko Hasuda, Masanori Arima, Ken Matsubara, Hideki Higashira
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Patent number: 9199337Abstract: Disclosed are a method and apparatus for determining acceptance/rejection of fine diameter wire bonding of semiconductor devices, LED devices, and the like, which has been impossible with conventional methods, such as the method by image processing, with high accuracy and with no contact.Type: GrantFiled: March 8, 2011Date of Patent: December 1, 2015Assignee: JTEKT CORPORATIONInventor: Jun Matsumoto
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Publication number: 20150337835Abstract: A pump includes: a housing in which a pump chamber accommodating an inner rotor and an outer rotor is formed in a pump chamber formation surface, and an O-ring groove is formed around the pump chamber; an O-ring that is placed in the O-ring groove; and a plate that is attached to the pump chamber formation surface and closely contacts the O-ring to close the pump chamber. Inter-hole grooves connecting to an outer edge of the pump chamber formation surface are formed around the O-ring groove.Type: ApplicationFiled: May 15, 2015Publication date: November 26, 2015Applicant: JTEKT CORPORATIONInventor: Takatoshi SAKATA
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Publication number: 20150340975Abstract: A vehicle control device of a rotary electrical machine control device includes an application voltage generation unit that generates a voltage control signal that is used to apply a power supply voltage to a DC/DC converter at a voltage equal to or higher than the power supply voltage or at a voltage lower than the power supply voltage; and a voltage command value generation unit that generates a motor control signal that controls a drive motor. The voltage command value generation unit performs computation based on overmodulation PWM control as PWM control in the case where the application voltage that is lower than the power supply voltage is applied so as to output the motor control signal having a pulse width longer than a cycle of a PWM carrier.Type: ApplicationFiled: May 14, 2015Publication date: November 26, 2015Applicant: JTEKT CORPORATIONInventors: Takuya YANAGI, Yuta IWAI
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Patent number: 9194430Abstract: A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward from the pocket, and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring before the cage segment is detached from the tapered roller when the cage segment is displaced to the radially inside.Type: GrantFiled: November 17, 2014Date of Patent: November 24, 2015Assignee: JTEKT CORPORATIONInventor: Hirotaka Yasuda
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Publication number: 20150328733Abstract: A machine tool that enables a reduction in the amount of deflection of a swiveling table is provided. A machine tool includes a base, a swiveling table that is shaped to be elongate and that swivels while sliding on an upper surface of the base, and an actuator attached to a longitudinal first end of the swiveling table to move a position of the first end of the swiveling table with respect to the base, thereby adjusting a swiveling angle of the swiveling table with respect to the base. The rigidity of the swiveling table against a bending force that bends the swiveling table in a deformed manner in a swiveling plane is set to increase from the longitudinal first end of the swiveling table toward the swiveling center.Type: ApplicationFiled: May 12, 2015Publication date: November 19, 2015Applicant: JTEKT CORPORATIONInventor: Akira MAKIUCHI
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Publication number: 20150328698Abstract: A rotary tool holder is provided which enables effective suppression of possible chattering vibration when a workpiece is machined using a rotary tool. A tool holder that is a rotary tool holder includes a main body that rotates while holding a rotary tool, an additional mass supported by the main body with a radial gap, a fluid path provided in the main body, and a viscoelastic damper configured by a fluid fed to the radial gap between the main body and the additional mass via the fluid path.Type: ApplicationFiled: April 28, 2015Publication date: November 19, 2015Applicant: JTEKT CORPORATIONInventors: Hisashi Otani, Hiroyuki Nakano, Shigeru Matsunaga, Ryota Tanase
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Publication number: 20150328745Abstract: A machine tool is provided in which chips and the like are prevented from adhering to a sliding surface of an upper surface of a base and a sliding surface of a lower surface of a swiveling table. A machine tool includes a base that has four corners and is shaped to be elongated, a swiveling table that swivels while sliding on an upper surface of the base, and a swiveling cover that is supported by the base or the swiveling table so as to be able to swivel. The swiveling cover protrudes from a widthwise edge of the swiveling table to cover a corner upper surface of the base in a first state where the swiveling table is not present on the corner upper surface, and is housed under the swiveling table in a second state where the swiveling table is present on the corner upper surface.Type: ApplicationFiled: May 12, 2015Publication date: November 19, 2015Applicant: JTEKT CORPORATIONInventor: Akira MAKIUCHI
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Publication number: 20150328704Abstract: A gear machining device is provided which can machine an accurate gear by a cutting process by synchronously rotating a machining tool and a workpiece at a high speed. A machining tool includes roughing cutting teeth for roughing bottom lands and right and left side faces of teeth of a gear, right side face finishing cutting teeth for finishing the right side faces of the teeth, and left side face finishing cutting teeth for finishing the left side faces of the teeth. The cutting teeth thus cut different parts of the teeth of the gear. This can reduce cutting resistance and suppress self-vibration during the cutting process, thereby improving tooth trace accuracy of the gear.Type: ApplicationFiled: April 28, 2015Publication date: November 19, 2015Applicant: JTEKT CORPORATIONInventors: Hisashi OTANI, Hiroyuki NAKANO, Hideki SHIBATA
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Patent number: 9187115Abstract: A steering apparatus has a tilt mechanism, and a locking direction of a tilt lock operation lever is a direction in which the operation lever is pushed down about a central axis. A width of a second end of a tilt elongate hole, which is located on a tilt direction lower side, is narrower than a width of a first end of the tilt elongate hole, which is located on a tilt direction upper side.Type: GrantFiled: December 19, 2014Date of Patent: November 17, 2015Assignee: JTEKT CORPORATIONInventor: Hideyuki Kakishita
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Patent number: 9188168Abstract: In a clutch plate of an annular shape and a wet type, a plurality of lubrication grooves each taking a U-shape in cross-section are formed on a friction engaging surface on at least one end side. The groove is provided with a groove forming portion crossing the circumferential direction and blunt portions extending along both sides of the groove forming portion and connecting the friction engaging surface with the groove forming portion. Where a straight line passing across one side end of the groove and extending in a radial direction is assumed as a virtual straight line, in a section of the groove taken along a plane that is orthogonal to the virtual straight line and that includes the one side end, the width of the blunt portion on one side is in a range of 0.12 to 0.35 mm, and the depth of the blunt portion is in a range of 25 to 50 ?m.Type: GrantFiled: August 24, 2012Date of Patent: November 17, 2015Assignee: JTEKT CorporationInventors: Junji Ando, Kunihiko Suzuki, Kazutaka Matsukawa, Hiroyuki Ando, Takuya Tsuda
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Patent number: 9181991Abstract: In a driving force transmission apparatus, an oil inlet portion for introducing hydraulic fluid from one of spaces to the other one of the spaces is formed, and an apparatus case has an oil outlet portion for delivering the hydraulic fluid from the other one of the spaces to an outside of the other one of the spaces with an oil delivery capacity lower than an oil introducing capacity of the oil inlet portion. A pressure regulation valve for bringing the oil inlet portion into an open state upon reception of hydraulic pressure higher than or equal to a predetermined pressure from hydraulic fluid is arranged at the oil inlet portion.Type: GrantFiled: April 17, 2013Date of Patent: November 10, 2015Assignee: JTEKT CORPORATIONInventors: Tomoyoshi Takai, Hiroshi Takuno, Kunihiko Suzuki
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Patent number: 9180734Abstract: In a machining tool, multiple tooth forming portions for plastically forming spline teeth on an axial end face of a vehicle hub unit, the axial end face facing inward in the vehicle lateral direction, are formed in a circular pattern about the central axis of the machining tool. In the machining tool, a rounded-portion forming portion is formed to form a rounded portion between a tooth flank and a top land of each spline tooth, and the radius of the rounded-portion forming portion gradually changes in the radial direction about the central axis.Type: GrantFiled: April 13, 2012Date of Patent: November 10, 2015Assignee: JTEKT CORPORATIONInventors: Takuya Toda, Takaaki Onizuka, Katsuyuki Harada
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Patent number: 9174669Abstract: In a control apparatus for a hydraulic power steering system including multiple electric pumps, a first ECU determines that start-up of a first motor is completed when a first current value, which is a value of current flowing to a first electric pump, has been within a prescribed current range continuously for a prescribed period of time or longer. An upper limit of the prescribed current range is set to be less than to a limit value provided as an upper limit of a current supplied simultaneously to the first and second electric pumps after completion of start-up. A lower limit of the prescribed current range is set to a minimum value of a current indicating that the first electric pump is in an energized state. After start-up of the first motor is determined to be completed, a second ECU starts electric power supply to the second electric pump.Type: GrantFiled: February 28, 2014Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventor: Yasushi Yamada
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Patent number: 9178402Abstract: In a circuit board, a control pattern portion in which control circuit patterns are formed and a drive pattern portion in which drive circuit patterns are formed are formed in different regions. A recessed portion is formed in a base, and the drive pattern portion is fixed to the base such that insulation between a drive circuit and the base is maintained and the control pattern portion is arranged above the recessed portion. In this way, a space in which a circuit element is able to be mounted is formed between the control pattern portion and the recessed portion.Type: GrantFiled: February 20, 2013Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventor: Nobuhiro Uchida
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Patent number: 9175680Abstract: A stator is fixedly fastened at its outer periphery by a cylindrical and thin metal collar. One end of the collar is engaged with a pump housing. Multiple metal nuts are embedded in insulators fitted to stator cores through insert molding. The stator of a brushless motor is fixed by screwing bolts passed through the pump housing from a pump plate, to nuts embedded in the insulators.Type: GrantFiled: January 28, 2013Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventors: Junichi Miyaki, Katsutoshi Nisizaki, Yoshihiro Oono, Naotake Kanda
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Patent number: 9174666Abstract: A rack shaft support device includes: a support yoke, a plug, an intermediate cam component and a rotation force generating spring. The plug includes a plug body, a plug cap component and a locknut. The plug body has a plug fixing portion, a plug back wall portion, a plug cam portion, a plug internal space and a first restricting portion. The first restricting portion has a first body portion and a first facing portion. The intermediate cam component includes an intermediate cam body, an intermediate cam portion and a second restricting portion. The second restricting portion has a second body portion and a second facing portion. The second facing portion faces the first facing portion.Type: GrantFiled: May 28, 2013Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventors: Taichi Yamamoto, Tetsuya Fujita
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Patent number: 9174667Abstract: A steering force assisting device that includes an electric motor and includes independent two sets of motor driving circuit and control unit, and the electric motor includes coils having the same polarity and different motor characteristics, the coils being wound around each of teeth of a stator of the electric motor. The motor characteristics are a high speed/low torque characteristic and a low speed/high torque characteristic, and may be selected on the basis of the running condition of a vehicle.Type: GrantFiled: October 17, 2011Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventor: Hiroshi Suzuki
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Patent number: 9174668Abstract: In an electric power steering system, an ECU calculates a steering angle of a steering wheel based on an output of a rotation angle sensor and an EPS gear ratio. The ECU calculates a correction amount for canceling a steering deviation caused due to a temperature change, based on a temperature of a rack shaft detected by a temperature sensor and a map stored in a memory, and corrects the correction amount by adding the correction amount to the calculated steering angle.Type: GrantFiled: February 26, 2014Date of Patent: November 3, 2015Assignee: JTEKT CORPORATIONInventor: Hiroshi Kichise
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Patent number: 9169871Abstract: A cage that includes a first and a second annular member made of resin that has a plurality of through-holes that are located at intervals in a circumferential direction and each of the first and second annular member having axial end faces. The cage also includes pipe members each having a portion that has a plurality of slits that are located at intervals in a circumferential direction. The pipe portions are passed through the through-holes of the first and second annular members. Fixed members of the cage each have a shaft portion passed through one of the pipe members. An outer face of each pipe member is engaged with both an inner peripheral face that defines a corresponding one of the through-holes of the first annular member and an inner peripheral face that defines a corresponding one of the through-holes of the second annular member, with a frictional force.Type: GrantFiled: June 23, 2014Date of Patent: October 27, 2015Assignee: JTEKT CORPORATIONInventor: Takaichi Fujimi
