Patents Assigned to JTEKT
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Patent number: 9156492Abstract: An energy absorbing steering apparatus in which shock applied to a steering column is absorbed by plastic deformation of a bracket for suspending the steering column from a vehicle body. The bracket includes: a first plate portion; a second plate portion bent from a rear edge of the first plate portion toward a lower portion; a third plate portion bent from a lower edge of the second plate portion toward a rear upper portion; and a fourth plate portion bent from an upper edge of the third plate portion toward the lower portion. An angle of a first bent portion between the first and second plate portions is an obtuse angle. An angle of a second bent portion between the second and third plate portions is an acute angle. An angle of a third bent portion between the third and fourth plate portions is an acute angle.Type: GrantFiled: May 24, 2013Date of Patent: October 13, 2015Assignee: JTEKT CORPORATIONInventor: Yoshikazu Kawada
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Patent number: 9157513Abstract: A rack guide unit includes a closure member secured to an external opening end of an accommodation portion of a housing, and a rack guide. Coned disc springs that urge the rack guide toward a rack shaft are interposed between the closure member and the rack guide. A protrusion of the closure member is passed through the coned disc springs and inserted in a recessed portion of the rack guide. An O-ring held in an accommodation groove formed in the outer periphery of the protrusion, at a position closer to the distal end of the protrusion than the coned disc springs are, functions as a retaining protrusion that restrains the coned disc springs from coming off the protrusion. For example, the coned disc springs and the closure member constitute a subassembly formed in advance.Type: GrantFiled: May 9, 2014Date of Patent: October 13, 2015Assignee: JTEKT CORPORATIONInventors: Makoto Taenaka, Akitake Kawakubo
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Publication number: 20150285609Abstract: A machine tool including a non-contact affected layer detection sensor capable of detecting an affected layer with high precision is provided. A machine tool includes a non-contact affected layer detection sensor, a main body, probes and that contact the surface of an workpiece, arm portions supported by the main body, and dimension measurement sensors that output a signal that corresponds to the dimension of the workpiece on the basis of displacement of the arm portions with respect to the main body. The affected layer detection sensor is provided in the arm portion, and outputs a signal that corresponds to an affected state of the workpiece. The arm portions hold the probes respectively, and are displaceable with respect to the main body in accordance with the dimension of the workpiece.Type: ApplicationFiled: April 1, 2015Publication date: October 8, 2015Applicant: JTEKT CORPORATIONInventors: Ryo ITO, Naomasa Mukaide
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Patent number: 9149912Abstract: A CBN grinding particle included in a CBN grinding wheel has a single crystal CBN grinding particle having a tetrahedron construction and a multi crystal CBN grinding particle. The single crystal CBN grinding particle is blended with a ratio of equal to or more than 50% to a total summed volume of the single and multi CBN grinding particles. A CBN grinding wheel having the CBN grinding particle is especially suitable for rough grinding.Type: GrantFiled: August 25, 2011Date of Patent: October 6, 2015Assignee: JTEKT CORPORATIONInventors: Shinji Soma, Naoto Ono, Tomokazu Yamashita
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Patent number: 9151328Abstract: The conical roller bearing includes an inner ring which includes an annular groove between an inner-ring-side raceway surface and a small-diameter-side end portion thereof, and a cage which includes an erected portion extending from a first annular portion of the cage towards the annular groove. The erected portion includes a first inclined portion and a second inclined portion. The first inclined portion is inclined towards conical rollers disposed in pockets of the cage while extending from the first annular portion towards the annular groove. The second inclined portion is inclined towards the small-diameter-side end portion while extending from the first inclined portion towards the annular groove. The second inclined portion is configured to be brought into engagement with the annular groove in an axial direction of the inner ring.Type: GrantFiled: October 10, 2013Date of Patent: October 6, 2015Assignee: JTEKT CORPORATIONInventors: Ryosuke Chudo, Motoshi Kawamura, Yoshihito Nakashima
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Patent number: 9150249Abstract: There is provided a steering assist device that allows a vehicle to avoid departing from a lane. A basic target current value setting unit sets a basic target current value on the basis of steering torque and a vehicle speed. A current compensation value computation unit computes a current compensation value for compensating the basic target current value on the basis of a lateral deviation and a lateral deviation variation rate such that the lateral deviation and the lateral deviation variation rate get close to zero. A target current value computation unit computes a target current value by subtracting the current compensation value computed by the current compensation value computation unit from the basic target current value set by the basic target current value setting unit.Type: GrantFiled: February 3, 2015Date of Patent: October 6, 2015Assignee: JTEKT CORPORATIONInventor: Toshiaki Oya
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Patent number: 9149399Abstract: A stair climbing vehicle that is able to stably climb stairs is provided. In order to keep the balance of the stair climbing vehicle at the time of climbing the stairs, the ratio between a gravity center moving control gain for the stair climbing vehicle and a turning control gain for first wheels and second wheels is changed by controlling the rotation of a first motor of each first turning actuator. Thus, it is possible to slightly turn the first wheels and the second wheels based on the posture of an occupant seated on the stair climbing vehicle when the occupant climbs the stairs with the stair climbing vehicle, thereby preventing the posture of the occupant from being unstable. Thus, the stair climbing vehicle is able to stably climb the stairs.Type: GrantFiled: August 26, 2014Date of Patent: October 6, 2015Assignee: JTEKT CORPORATIONInventors: Masaya Segawa, Motoki Shino
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Publication number: 20150277417Abstract: A method of inspecting a RAM of a programmable logic controller is provided that enables all unit storage regions in a RAM inspection region to be inspected in about several minutes and that meets a predetermined safety standard. The inspection method includes the steps of: (a) dividing a RAM inspection region, which is a region of the RAM to be inspected, into a plurality of blocks; and (b) by a control device, writing a predetermined value into unit storage regions in a combination of blocks obtained by combining two blocks extracted from the divided blocks and thereafter sequentially inspecting whether or not values read from the unit storage regions each coincide with the written value. Step (b) is executed for all combinations of two blocks extracted from the divided blocks.Type: ApplicationFiled: March 17, 2015Publication date: October 1, 2015Applicant: JTEKT CORPORATIONInventor: Kenichi IKEGAMI
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Publication number: 20150277415Abstract: A programmable logic controller capable of improving the expandability of a distributed control system and a programming tool for the programmable logic controller are provided. A programmable logic controller (PLC) that constitutes a distributed control system includes: a variable table that includes variable information including identification symbols for identification of a plurality of PLCs and variable names of reference variables, the variable information being set for each of the reference variables; a storage device that has a memory region for storing the reference variables; and an interface circuit that mutually converts communication data for use in communication between the PLC and a different PLC and the reference variables stored in the memory region. The reference variables are variables mutually referenced by the plurality of PLCs.Type: ApplicationFiled: March 20, 2015Publication date: October 1, 2015Applicant: JTEKT CORPORATIONInventors: Terukazu SENDA, Kenji YOSHIDA, Satoshi KATO
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Patent number: 9145876Abstract: A control signal output unit obtains a motor control signal by applying a reduction amount for a current command value obtained by an over-power suppression control unit to a current command value from a host control unit. The over-power suppression control unit includes a hydraulic pressure estimation unit that estimates hydraulic pressure, and a current command value correction amount calculation unit that compares a target hydraulic pressure with an estimated hydraulic pressure and outputs the reduction amount for the current command value. Load information indicating whether a load on the pump is a low load or a high load that is higher than the low load is input into a control circuit from the host control unit, and the over-power suppression control unit changes the target hydraulic pressure in accordance with a magnitude of the load indicated by the load information.Type: GrantFiled: December 27, 2012Date of Patent: September 29, 2015Assignee: JTEKT CORPORATIONInventor: Hiroki Kagawa
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Patent number: 9145930Abstract: An apparatus includes: a cam that has two cam members disposed facing each other and produces thrust in an axis direction; an attracting member that creates friction force by attracting the cam members into contact with the attracting member by magnetic attraction force; an attracted member that is attached to one cam member of the two so as to rotate integrally together with the one cam member and be relatively movable in the axis direction, and that is attracted by the attracting member into contact with the attracting member so that the friction force is produced; a first return spring that exerts elastic force on the attracted member so as to move the attracted member away from the attracting member against the magnetic attractive force; and a second return spring that exerts elastic force on the one cam member.Type: GrantFiled: June 27, 2012Date of Patent: September 29, 2015Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CorporationInventors: Hiroaki Ebuchi, Hideaki Komada, Hirotatsu Kitabatake, Hiroto Hashimoto, Minoru Onitake, Kenji Korenaga
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Publication number: 20150267754Abstract: An inner ring has a plurality of grooves which are formed on its inner peripheral face and extended from an end thereof in an axial direction. The grooves are extended from both ends in the axial direction of the inner ring inwardly in the axial direction, and closed in a middle part in the axial direction of the inner peripheral face of the inner ring. The grooves are formed in plurality at an equal interval in a circumferential direction.Type: ApplicationFiled: October 11, 2013Publication date: September 24, 2015Applicant: JTEKT CORPORATIONInventor: Akiyuki Suzuki
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Patent number: 9138837Abstract: A method of manufacturing a bearing ring of a rolling bearing includes a process of forming a bearing ring material in which a raceway groove is formed, a process of performing form rolling so as to form surface textures in axially opposite end portions of the raceway groove, a heat treatment process, a grinding process, and a super-finishing process.Type: GrantFiled: June 4, 2013Date of Patent: September 22, 2015Assignee: JTEKT CORPORATIONInventors: Shigeo Kamamoto, Junji Murata
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Publication number: 20150258659Abstract: A truing device is supported so as to be elastically movable in the Z-axis direction, which is parallel to a grinding wheel rotational axis, and elastically movable in the X-axis direction in which a grinding wheel cuts into the truing device, and includes a movement restriction device that controls prohibition and permission of elastic movement. The method includes: causing a surface of the grinding wheel to contact the truing device in the X-axis direction; and correcting a shape of the grinding wheel when the grinding wheel cuts into the truing device until the amount of elastic movement of the truing device in the X-axis direction reaches a first predetermined amount, by controlling the movement restriction device to prohibit elastic movement of the truing device, and thereafter causing the grinding wheel to further cut into the truing device in the X-axis direction by a second predetermined amount.Type: ApplicationFiled: March 13, 2015Publication date: September 17, 2015Applicant: JTEKT CORPORATIONInventors: Naoto ONO, Satoshi Okubo, Toshiki Sakai
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Publication number: 20150261214Abstract: A numerical control unit is provided that can change an override value according to various workpiece materials and can extend the tool life. A numerical control unit includes a variation storage unit that stores a variation in override value of a feed speed or a spindle speed for each workpiece material, an override value setting unit that sets the override value based on the variation in override value according to the material of a workpiece being machined; and a control unit that changes the feed speed or the spindle speed based on the override value.Type: ApplicationFiled: March 9, 2015Publication date: September 17, 2015Applicant: JTEKT CORPORATIONInventors: Katsuhiro MASEKI, Tatsuhiko Inagaki, Hiroyuki Tsusaka, Kazuhiro Tsujimura
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Publication number: 20150258889Abstract: A driving force distribution control apparatus includes: a driving force transmission device including a clutch which can change distribution of a driving force to front wheels and rear wheels of a four-wheel drive vehicle; and a controller which controls an engagement force of the clutch in accordance with a traveling state. The controller includes a different-diameter tire detector which detects an attachment of a different-diameter tire to one of the front wheels and the rear wheels when a rotation speed ratio between the front wheels and the rear wheels continues to be equal to or larger than a reference rotation speed ratio for a predetermined time. The different-diameter tire detector performs detection of the attachment of the different-diameter tire when it is determined that the wheels are unlikely to slip based on an outside condition.Type: ApplicationFiled: March 4, 2015Publication date: September 17, 2015Applicants: JTEKT Corporation, Mazda Motor CorporationInventors: Kotaro SARAI, Tomoaki Kato, Hiroto Kawano, Daisuke Kofu, Yasushi Yagi
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Publication number: 20150261213Abstract: An NC program creating device is provided that can automatically insert in an NC program a code that can be executed simultaneously with feeding in a non-cutting state. If it is determined by a determination unit that there is a standard code M03, M06, M10 before or after a non-cutting feed code G00 or G30 in an NC program, a new code placement unit places, instead of the standard code M03, M06, M10, a simultaneous execution code M103, M805, M110 corresponding to the standard code M03, M06, M10 before the non-cutting feed code G00 or G30, and places after the non-cutting feed code G00 or G30 a code that performs at least a prescribed operation of the standard code M03, M06, M10 other than an operation of the simultaneous execution code M103, M805, M110.Type: ApplicationFiled: March 11, 2015Publication date: September 17, 2015Applicant: JTEKT CORPORATIONInventors: Katsuhiro MASEKI, Tatsuhiko INAGAKI, Hiroyuki TSUSAKA, Kazuhiro TSUJIMURA
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Patent number: 9133876Abstract: A wheel bearing device includes: an inner shaft; an inner ring; an outer ring; and first and second rolling element groups. The first rolling element group is disposed on the vehicle outer side. The second rolling element group is disposed on the vehicle inner side. The first and second rolling element groups have the same contact angle and the same number of balls. A relationship between a ball diameter D1 of the first rolling element group and a ball diameter D2 of the second rolling element group is set such that an inequality D1>D2 is satisfied. A relationship between a pitch circle diameter PCD1 of the first rolling element group and a pitch circle diameter PCD2 of the second rolling element group is set such that an equation PCD1=D1/D2×PCD2 is satisfied.Type: GrantFiled: December 16, 2014Date of Patent: September 15, 2015Assignee: JTEKT CORPORATIONInventors: Yoshiyuki Ina, Toshihiro Hakata, Masaki Maeda
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Patent number: 9133891Abstract: A clutch plate arranged to face a contact object so as to be relatively rotatable and relatively movable includes a contact surface being able to contact the contact object via lubricant and a minute groove open at the contact surface and formed of a plurality of groove portions having a predetermined groove pitch. A ratio of a contact area of the contact surface to an area obtained by adding an opening area of the minute groove to the contact area of the contact surface is 90% to 96% in an initial state.Type: GrantFiled: July 26, 2013Date of Patent: September 15, 2015Assignee: JTEKT CorporationInventors: Junji Ando, Hiroyuki Ando, Takuya Tsuda
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Patent number: 9127723Abstract: A one-way clutch is arranged between an output shaft of a speed increaser and a drive shaft of a generator in a wind power generator. The one-way clutch includes an inner ring, an outer ring, a plurality of rollers arranged between an outer periphery of the inner ring and an inner periphery of the outer ring, a cage that retains the rollers at predetermined intervals in a circumferential direction, and a plurality of elastic members that is attached to the cage and that urges the corresponding rollers in one direction. The cage includes a pair of axially facing annular portions and a plurality of cage bar portions formed separately from the annular portions, both axial end portions of each of the cage bar portions being fitted to the respective annular portions.Type: GrantFiled: April 18, 2013Date of Patent: September 8, 2015Assignee: JTEKT CORPORATIONInventor: Hideki Fujiwara
