Patents Assigned to JTEKT
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Publication number: 20070295139Abstract: A parallel mechanism adapted to control at least one of pivotal movement and linear movement of a link head having three degrees of freedom. The parallel mechanism has four actuators for driving the link head, and link groups which have four links connected to the four actuators, respectively, and each of which is connected to the link head. A rotation joint interposed between each of the link groups and the link head is made a linear joint which is connected to the link head so as to be relatively movable in one axis direction with respect to the link head.Type: ApplicationFiled: November 22, 2006Publication date: December 27, 2007Applicant: JTEKT CorporationInventor: Hiromichi Ota
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Publication number: 20070295109Abstract: A yoke assembly is constructed by retaining integrally a yoke ring having positioning holes aligned with pole claws arranged equally on the inner circumference and a yoke ring having positioning holes aligned with the space between pole claws arranged equally on the inner circumference by a retaining cylinder made of a resin. The retaining cylinder has a pin hole remaining after pulling out a common positioning pin inserted into the positioning holes during molding.Type: ApplicationFiled: June 20, 2007Publication date: December 27, 2007Applicants: JTEKT CORPORATION, NAKANISHI METAL WORKS, CO., LTD.Inventors: Yoshitomo Tokumoto, Masashi Hashiya, Tadashi Kitahata
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Patent number: 7311631Abstract: The number of the teeth of a second sun gear is slightly different from that of a first sun gear. A first planetary gears mesh with both the first sun gear and the second sun gear. A first carrier supports the first planetary. The number of the teeth of a third sun gear is same as that of the first sun gear. The second planetary gears mesh with both the second sun gear and the third sun gear. The second carrier supports the second planetary gears with preventing the same from revolving. The second power source generates a torque for rotating the first carrier.Type: GrantFiled: October 13, 2005Date of Patent: December 25, 2007Assignee: JTEKT CorporationInventor: Hiroshi Kushino
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Publication number: 20070292064Abstract: A cage includes a cage body in an annular shape which is formed with a plurality of pockets for receiving rolling elements, an oil containing member in an annular shape which is attached to an inner peripheral surface of the cage body and formed of material capable of impregnating lubricating oil, and an applying member for applying the lubricating oil in the oil containing member to an inner ring.Type: ApplicationFiled: June 19, 2007Publication date: December 20, 2007Applicant: JTEKT CORPORATIONInventor: Shinji Fukuda
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Publication number: 20070293326Abstract: A yoke for universal joint includes a cylindrical base, and a pair of arms extending from an end of the base in parallel to a center axis of the base. Each of the arms is formed with a support hole for supporting a corresponding trunnion of a cross shaft via a bearing. The support hole of each arm has a center axis extending in a direction orthogonal to the center axis of the base. A relief portion including a concave curved surface is formed at the end of the base. The concave curved surface of the relief portion has a center of curvature located at place offset from a center of a joint 1 toward a distal end of the arm.Type: ApplicationFiled: June 11, 2007Publication date: December 20, 2007Applicant: JTEKT CorporationInventor: Ryouichi Tokioka
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Publication number: 20070289804Abstract: A vehicle including a steer-by-wire type steering device controlling yaw moment of the vehicle in correspondence with an operation of a steering wheel mechanically separated from each of wheels. The wheels are configured such that a steered angle cannot be changed. The steering device has a power distribution device capable of changing a distribution rate of power applied to each of the wheels, and a braking force control device capable of separately controlling a braking force for each of the wheels. The steering device controls a yaw moment of the vehicle by separately controlling the power applied to each of the wheels and the braking force in each of the wheels.Type: ApplicationFiled: May 16, 2006Publication date: December 20, 2007Applicant: JTEKT CorporationInventors: Shinji Takeuchi, Jiro Nakano
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Publication number: 20070289806Abstract: There is provided a power steering apparatus comprising a torque sensor detecting a steering torque capable of discriminating a normal input and an inverse input without a torsion bar. An intermediate gear engaging with rack teeth provided in an outer surface of a rack shaft and a pinion provided in a lower portion of a pinion shaft is interposed between both the rack tooth and the pinion. A force applied to the pinion shaft is detected by a first force sensor, a force applied to a support shaft of the intermediate gear is detected by a second force sensor, and a torque detection value capable of discriminat ing the normal input and inverse input is calculated by a torque calculating unit to which outputs of both the sensors are given.Type: ApplicationFiled: May 23, 2007Publication date: December 20, 2007Applicant: JTEKT CORPORATIONInventor: Osamu Matsuda
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Publication number: 20070289807Abstract: To provide a motor in which a rattle is hardly caused even if a bearing and a shaft are made of different materials, a motor includes a cylindrical motor case having a bottom, in a bracket which supports a press-fitted output shaft side bearing and closes an opening of the motor case. The motor further includes a ring member that is press-fitted to the bracket and is brought into abutment with the output shaft side bearing. The bracket and the ring member are made of the same material.Type: ApplicationFiled: May 25, 2007Publication date: December 20, 2007Applicant: JTEKT CorporationInventors: Naotake KANDA, Noboru NIGUCHI
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Patent number: 7308834Abstract: A torque sensor is provided with a torsion bar, first and second elongate sleeves respectively secured to one and the other ends of the torsion bar, and a pair of resolvers respectively mounted on the first and second elongate sleeves. First and second stop portions are provided respectively at overlapping portions of the first and second elongate sleeves where the second elongate sleeve is fit partly on the external surface of the first elongate sleeve with a play. A rotary sleeve given to one of the resolvers is press-fit on the external surface of the stop portion provided on the second elongate sleeve for mounting one of the resolvers thereon as well as for reinforcing the mechanical strength of the stop portion provided on the second elongate sleeve. Further, the resolvers used therein are chosen as those respectively having n-poles and m-poles.Type: GrantFiled: March 24, 2006Date of Patent: December 18, 2007Assignee: JTEKT CorporationInventors: Mitsunori Naruse, Yuji Yoshizawa, Yusuke Mochizuki
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Publication number: 20070284020Abstract: A rolling, sliding member is formed from a steel containing 0.9 wt. % to 1.1 wt. % C, 0.5 wt. % to 3.0 wt. % Si, 0.05 wt. % to 0.5 wt. % Mn, 2.0 wt. % to 5.0 wt. % Cr, and 0.05 wt. % to 0.5 wt. % Mo, the balance being Fe and unavoidable impurities. The average grain size of spheroidal carbide is 0.6 ?m or less, and the spheroidal carbide content is 6.0% or less as percent area. In a toroidal-type continuously variable transmission, the rolling, sliding member is used as at least either disks 4 and 9 each having a concave raceway surface on a side surface thereof, or rollers 16 rolling on raceway surfaces 4b and 9b of the disks 4 and 9. The toroidal-type continuously variable transmission using the rolling, sliding member of the present invention exhibits long life.Type: ApplicationFiled: October 17, 2005Publication date: December 13, 2007Applicant: JTEKT CorporationInventors: Hisashi Harada, Yoshihiro Ono
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Publication number: 20070288144Abstract: An automatic parking control is cancelled when a motor current has not yet reached a maximum current value Imax with a steering angle deviation exceeding a deviation threshold value. In addition, the automatic parking control is cancelled when a steering speed has not yet reached a maximum steering speed with a state where the motor current has reached and remains at the maximum steering speed continuing over a first time period. On the other hand, when a state where the steering speed has reached and remains at the maximum steering speed continues over a second time period, it is determined that there occurs an output shortage of a steering actuator, an automatic parking condition is recalculated, so as to allow the automatic parking continue to continue.Type: ApplicationFiled: June 8, 2007Publication date: December 13, 2007Applicant: JTEKT CorporationInventors: Masanori Arima, Naoki Maeda, Kosuke Yamanaka, Atsushi Ishihara, Tatsuma Kouchi, Shingo Maeda, Daisuke Maeda
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Publication number: 20070288143Abstract: In a steering-without-driving state, a larger current limit value, drive limit time and steering angle deviation threshold value are set than when a low-speed driving state occurs. An automatic parking mode is held until a time period over which a state where a motor current value of an electric motor which drives a steering mechanism is equal to the current limit value reaches the drive limit time. Even though the state where the motor current value is equal to the current limit value has continued over the drive limit time, the automatic parking mode is held during the steering angle deviation not exceeding the steering angle deviation threshold value. When the state where the motor current value is equal to the current limit value has continued over the drive limit time Ta and that the steering angle deviation exceeds the threshold value, the automatic parking control is cancelled.Type: ApplicationFiled: June 8, 2007Publication date: December 13, 2007Applicant: JTEKT CORPORATIONInventors: Masanori Arima, Naoki Maeda, Kosuke Yamanaka, Atsushi Ishihara, Tatsuma Kouchi, Shingo Maeda, Daisuke Maeda
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Publication number: 20070288142Abstract: A vehicle steering system includes: a steering actuator that imparts a steering force to a steering mechanism of a vehicle; an automatic steering controller that performs an automatic steering control by controlling the steering actuator; a driving state detector that detects a driving state of the vehicle during the automatic steering control; a threshold value setting unit that variably sets a threshold value for permitting an intervention in the automatic steering control; and an automatic steering intervention unit that intervenes in the automatic steering control based on a threshold value set by the threshold value setting unit.Type: ApplicationFiled: June 6, 2007Publication date: December 13, 2007Applicant: JTEKT CorporationInventors: Naoki MAEDA, Kosuke Yamanaka, Masanori Arima, Atsushi Ishihara, Tatsuma Kouchi, Shingo Maeda, Daisuke Maeda
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Publication number: 20070288145Abstract: A brake application speed is compared with a speed threshold value so as to judge whether or not a braking operation being performed is an emergency braking operation. If not the emergency braking operation, an automatic parking mode is held. When the emergency braking operation is in effect, control information related to a state of an automatic parking control then is stored in a control information storage section, and the automatic parking control is cancelled. Thereafter, when a steering operation or a gearshift operation is performed before a cancellation of application of the brake is detected, the process is ended, and the control mode is held in an assist mode. When the application of the brake is cancelled with neither the steering operation nor the gearshift operation performed, the control information is read in so as to resume the automatic parking control.Type: ApplicationFiled: June 8, 2007Publication date: December 13, 2007Applicant: JTEKT CorporationInventors: Shingo Maeda, Masanori Arima, Naoki Maeda, Kosuke Yamanaka, Atsushi Ishihara, Tatsuma Kouchi, Daisuke Maeda
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Patent number: 7306537Abstract: A plurality of pinion gears 4A, 4B which are rotatably held within a differential case 2, a pair of left and right side gears 6L, 6R disposed in meshing engagement with the pinion gears and connected to left and right axles, respectively, and thrust washers 16L, 16R interposed between the rear surfaces of the side gears and the internal surface of the differential case are provided. The differential case is of a one-piece type, and is formed with an opening 2b in its sidewall, which is used in assembling the pinion gears and the like. The internal surface of the differential case is formed with pinion gear holders 12A, 12B. The pinion gears are inserted, followed by the insertion of the side gears. The side gears are spaced from the pinion gears by an amount corresponding to the thickness of the thrust washers, and this allows the side gears to be inserted in following relationship with the pinion gears.Type: GrantFiled: June 16, 2006Date of Patent: December 11, 2007Assignee: JTEKT CorporationInventor: Shinichiro Nakajima
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Patent number: 7306070Abstract: A variable gear ratio hydraulic power steering device 1 is provided with a variable ratio transmission mechanism 7 for varying the rotation transmission ratio between the rotational angle of a steering handle 31 and the rotational angle of a pinion shaft 33 and a flow volume control valve 40 for controlling the discharge flow volume of an oil pump 10 which circulates operating fluid. The variable ratio transmission mechanism 7 has a lock mechanism 75. A valve controlling controller 50 for controlling the flow volume control valve 40 switches main and secondary flow volume control maps for controlling the flow volume control valve 40, in dependence on the operational state of the lock mechanism 75. Thus, a failsafe function for the variable ratio transmission mechanism 7 is given to the variable gear ratio hydraulic power steering device 1.Type: GrantFiled: April 4, 2005Date of Patent: December 11, 2007Assignee: JTEKT CorporationInventor: Yukihiro Kobayashi
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Patent number: 7305902Abstract: A ball screw device comprises a screw shaft, a nut externally mounted on the screw shaft, and a multiplicity of balls interposed between thread grooves of the screw shaft and the nut. The screw shaft has a ball circulation groove for coupling downstream and upstream sides of the thread groove so that the balls are returned from the downstream side to the upstream side and thereby circulated in the thread groove of the screw shaft. The ball circulation groove has such a curved shape as to sink radially inward in an intermediate region in a rolling direction of the balls and has a curved shape protruding radially outward in both end regions, and is configured in the manner that the centrodes of the balls rolling in the both end regions and the balls rolling in the thread groove of the screw shaft satisfy predetermined conditions with respect to circulation of the balls.Type: GrantFiled: September 11, 2002Date of Patent: December 11, 2007Assignee: JTEKT CorporationInventors: Masahiro Inoue, Isao Usuki
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Publication number: 20070282457Abstract: A programmable controller having self-diagnosis unit 60 (70) for self-diagnosis, wherein the self-diagnosis unit 60 (70) comprises data storage unit 61 (71) for storing data pertaining to an inspection unit for which the inspection is completed, and inspection start unit 62 (72) for starting the inspection from the next inspection unit of the inspection unit for which the inspection is already completed at the time before the power is turned on, when performing a self-diagnosis that occurs after the power is turned on, based on the data stored in the data storage unit 61 (71).Type: ApplicationFiled: January 29, 2007Publication date: December 6, 2007Applicants: JTEKT Corporation, Elan Schaltelemente GmbH & Co.Inventors: Tsutomu Araki, Mitsushi Nishi, Manfred Kramer
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Publication number: 20070282499Abstract: In an automatic parking mode, a target path is obtained, and a vehicle is automatically controlled to follow the target path. When a driver intervenes steering of the vehicle, an anticipated course to be taken by the vehicle to follow after the intervention to the steering is calculated as a revised path. When the vehicle follows the revised path, if the vehicle is expected to be brought into contact with an obstacle, firstly, an alarm is raised. When an avoidance operation is performed after the alarm, an anticipated course to be taken by the vehicle to follow after the avoidance operation is re-calculated as a revised path. If no avoidance operation is performed or if the vehicle is expected to be brought into contact with the obstacle even when the vehicle follows the revised path, forced brakes are applied to the vehicle, and the automatic parking control is halted.Type: ApplicationFiled: June 4, 2007Publication date: December 6, 2007Applicant: JTEKT CorporationInventors: Shingo MAEDA, Masanori ARIMA, Naoki MAEDA, Kosuke YAMANAKA, Atsushi ISHIHARA, Tatsuma KOUCHI, Daisuke MAEDA
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Publication number: 20070277636Abstract: An electric power steering apparatus includes a steering assisting electric motor having a motor housing for accommodating an annular rotor and an annular stator. The rotor and the stator are disposed coaxially with a steering shaft. The motor housing is supported by a support member mounted to a vehicle body member. A shock applied to a steering member when the motor vehicle crashes is absorbed by the relative movement between the motor housing and the support member.Type: ApplicationFiled: May 29, 2007Publication date: December 6, 2007Applicant: JTEKT CorporationInventors: Kenji Higashi, Yasuyuki Yoshii, Kazuya Yoshioka, Shimon Jimbo
