Patents by Inventor Yasuhiro Yukitake
Yasuhiro Yukitake has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9623900Abstract: A vehicle steering device includes: a steering mechanism that steers steered wheels by driving of a steering motor according to operation of an operation unit; a motor angle sensor that detects a rotation angle of the steering motor as an electrical angle; a steered angle sensor that detects a steered angle of the steered wheels; a storage unit in which correspondence between the electrical angle and the steered angle that are detected is stored in advance; and a failure determination unit that determines whether there is a failure or not by comparing the relation between the detected electrical angle and the detected steered angle with the correspondence between the electrical angle and the steered angle that is stored in the storage unit.Type: GrantFiled: February 19, 2015Date of Patent: April 18, 2017Assignee: JTEKT CORPORATIONInventor: Yasuhiro Yukitake
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Publication number: 20150239492Abstract: A vehicle steering device includes: a steering mechanism that steers steered wheels by driving of a steering motor according to operation of an operation unit; a motor angle sensor that detects a rotation angle of the steering motor as an electrical angle; a steered angle sensor that detects a steered angle of the steered wheels; a storage unit in which correspondence between the electrical angle and the steered angle that are detected is stored in advance; and a failure determination unit that determines whether there is a failure or not by comparing the relation between the detected electrical angle and the detected steered angle with the correspondence between the electrical angle and the steered angle that is stored in the storage unit.Type: ApplicationFiled: February 19, 2015Publication date: August 27, 2015Inventor: Yasuhiro YUKITAKE
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Patent number: 9046173Abstract: A transmission driving device that is capable of preventing displacement of a shift operation member or a select operation member in a case where there is reverse input in the shift operation member or the select operation member by inhibiting rotation of a rotation member which is released from an input shaft. When an input shaft and a first rotor are connected, the first electromagnetic coil is an excitation state and a second electromagnetic coil is in a non-excitation state. In this state, a second magnetic ring is not attracted to the side of the second electromagnetic coil, a seventh facing, which is fixed to the second magnetic ring, and an eighth facing are engaged with each other, and a second rotor and a casing are connected to each other. In a connection state of the second rotor and the casing, the second rotor cannot be rotated.Type: GrantFiled: March 22, 2011Date of Patent: June 2, 2015Assignee: JTEKT CORPORATIONInventors: Hiroki Kagawa, Yasuhiro Yukitake
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Patent number: 8714041Abstract: A transmission that is able to perform shift operation and select operation using the driving force of a single electric motor is provided. A shift/select actuating device includes: an electric motor; a first conversion mechanism; a second conversion mechanism; and a changing unit that changes a destination, to which the rotational driving force of the electric motor is transmitted, between the first conversion mechanism and the second conversion mechanism. The changing unit includes: a first electromagnetic clutch that transmits the rotational driving force of the electric motor to the first conversion mechanism or interrupts the rotational driving force; and a second electromagnetic clutch that transmits the rotational driving force to the second conversion mechanism or interrupts the rotational driving force.Type: GrantFiled: August 31, 2010Date of Patent: May 6, 2014Assignee: JTEKT CorporationInventors: Yasuhiro Yukitake, Akiyoshi Tashiro, Hiroki Kagawa, Takafumi Uemoto
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Publication number: 20140041468Abstract: An electric actuator includes: an electric motor that includes an output shaft and generates a rotational driving force; shift and select conversion mechanisms that transmit the rotational driving force to a shift select shaft; a transmission shaft that transmits the rotational driving force to the shift and select conversion mechanisms; and a coupling that is provided coaxially with the output shaft and the transmission shaft and connects the output shaft to the transmission shaft so that the output shaft and the transmission shaft are rotatable together. The electric actuator includes a resolver that detects a rotation angle of the output shaft, with regard to the electric motor. A resolver rotor of the resolver is fitted to an outer periphery of a transmission shaft-side cylindrical portion of the coupling.Type: ApplicationFiled: July 31, 2013Publication date: February 13, 2014Applicant: JTEKT CORPORATIONInventor: Yasuhiro YUKITAKE
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Publication number: 20130008279Abstract: A transmission driving device that is capable of preventing displacement of a shift operation member or a select operation member in a case where there is reverse input in the shift operation member or the select operation member by inhibiting rotation of a rotation member which is released from an input shaft. When an input shaft and a first rotor are connected, the first electromagnetic coil is an excitation state and a second electromagnetic coil is in a non-excitation state. In this state, a second magnetic ring is not attracted to the side of the second electromagnetic coil, a seventh facing, which is fixed to the second magnetic ring, and an eighth facing are engaged with each other, and a second rotor and a casing are connected to each other. In a connection state of the second rotor and the casing, the second rotor cannot be rotated.Type: ApplicationFiled: March 22, 2011Publication date: January 10, 2013Applicant: JTEKT CORPORATIONInventors: Hiroki Kagawa, Yasuhiro Yukitake
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Patent number: 8310125Abstract: In a motor comprising a stator and a rotor disposed in an inner circumference of the stator, the stator comprises a substantially cylindrical stator core and coils made up of wound conductors, and the stator core comprises an outer circumferential portion which constitutes an outer circumferential wall of the stator and an inner circumferential portion round which the conductors are wound. The outer circumferential portion is formed of a first sintered metal made of a powder magnetic material, while the inner circumferential portion is formed of a second sintered metal made of a powder magnetic material, and the first sintered metal is a sintered metal having a higher mechanical strength than the second sintered metal. Additionally, the stator core is formed by diffusion bonding the outer circumferential portion and the inner circumferential portion being bonded together.Type: GrantFiled: February 22, 2008Date of Patent: November 13, 2012Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Publication number: 20120144942Abstract: A transmission that is able to perform shift operation and select operation using the driving force of a single electric motor is provided. A shift/select actuating device includes: an electric motor; a first conversion mechanism; a second conversion mechanism; and a changing unit that changes a destination, to which the rotational driving force of the electric motor is transmitted, between the first conversion mechanism and the second conversion mechanism. The changing unit includes: a first electromagnetic clutch that transmits the rotational driving force of the electric motor to the first conversion mechanism or interrupts the rotational driving force; and a second electromagnetic clutch that transmits the rotational driving force to the second conversion mechanism or interrupts the rotational driving force.Type: ApplicationFiled: August 31, 2010Publication date: June 14, 2012Applicant: JTEKT CORPORATIONInventors: Yasuhiro Yukitake, Akiyoshi Tashiro, Hiroki Kagawa, Takafumi Uemoto
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Patent number: 8142171Abstract: An electric pump unit includes an outer rotor, an inner rotor which meshes with the outer rotor in such a state that the inner rotor and the outer rotor are placed eccentrically to each other and which is driven by being supported by a rotation shaft of an electric motor, a pump housing which defines a cavity portion which accommodates therein the outer rotor and the inner rotor, inlet and outlet ports which are provided on inlet and outlet sides, respectively, so as to suck and discharge a fluid and which communicate with each other via the cavity portion, and a fluid circulating unit for circulating the fluid from the outlet side to the inlet side when a fluid pressure at the outlet side reaches or exceeds a predetermined pressure.Type: GrantFiled: December 4, 2007Date of Patent: March 27, 2012Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Patent number: 7719157Abstract: A motor includes a rotor having a permanent magnet fitted thereon, and a stator having an inner peripheral surface spaced a predetermined distance from an outer peripheral surface of the rotor in opposed relation thereto, and the stator is press-fitted in a motor case to be fixed thereto with its outer peripheral surface. A plurality of projecting portions are formed on an inner peripheral surface of the motor case. Recess portions for engagement with the respective projecting portions are formed in the outer peripheral surface of the stator. When the stator is press-fitted into the motor case, the stator is fixed to the motor case with inner bottom surfaces of the recess portions serving as press-fitting surfaces. The projecting portions of the motor case are engaged respectively in the recess portions of the stator, thereby preventing the rotation of the stator relative to the motor case.Type: GrantFiled: September 10, 2007Date of Patent: May 18, 2010Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Publication number: 20100040488Abstract: In a motor comprising a stator and a rotor disposed in an inner circumference of the stator, the stator comprises a substantially cylindrical stator core and coils made up of wound conductors, and the stator core comprises an outer circumferential portion which constitutes an outer circumferential wall of the stator and an inner circumferential portion round which the conductors are wound. The outer circumferential portion is formed of a first sintered metal made of a powder magnetic material, while the inner circumferential portion is formed of a second sintered metal made of a powder magnetic material, and the first sintered metal is a sintered metal having a higher mechanical strength than the second sintered metal. Additionally, the stator core is formed by diffusion bonding the outer circumferential portion and the inner circumferential portion being bonded together.Type: ApplicationFiled: February 22, 2008Publication date: February 18, 2010Inventor: Yasuhiro Yukitake
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Publication number: 20100008797Abstract: An electric pump unit which comprises an outer rotor having a trochoidal tooth profile and an inner rotor which meshes with the outer rotor in such a state the inner rotor and the outer rotor are placed eccentric relative to each other for rotation and also comprises a pump part which is accommodated in a bottomed cylindrical pump housing. A low pressure portion and a high pressure portion are formed by both the rotors, and oil is made to be sucked and discharged through an inlet port and an outlet port which communicate respectively with the low pressure portion and the high pressure portion. A relief valve is provided for circulating oil from the high pressure portion to the low pressure portion when an oil pressure at the high pressure side reaches or exceeds a predetermined pressure.Type: ApplicationFiled: December 4, 2007Publication date: January 14, 2010Applicant: JTEKT CORPORATIONInventor: Yasuhiro Yukitake
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Patent number: 7629721Abstract: A stator of a motor according to the invention includes a stator core 1 annularly continued, a plurality of insulators each having a body part which is engaged with an outer peripheral surface of a tooth part of the stator core and a flange part which is projected at a distal end side of the tooth part, and a coil which is wound around the tooth part by way of the insulator. A first magnetic body is provided on a surface of the flange part of the insulator opposed to a rotor, in a state magnetically connected to the tooth part.Type: GrantFiled: February 23, 2007Date of Patent: December 8, 2009Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Patent number: 7602594Abstract: To provide a motor control apparatus, including a rotational number detecting means for detecting the rotational number of a motor; a current detecting means for detecting a motor current; a voltage detecting means for detecting an impressed voltage to be supplied to a motor; a temperature estimating means for obtaining a motor temperature from the rotational number of a motor, the motor current, and the impressed voltage; and a protection signal generating means for generating an operational signal in order to protect the motor when the obtained motor temperature exceeds a predetermined value.Type: GrantFiled: December 28, 2006Date of Patent: October 13, 2009Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Patent number: 7497800Abstract: In a method of operating an electric motor which drives an auxiliary oil pump for supplying a hydraulic pressure of an ATF to a transmission, only at an idle stop of an engine via a rotation shaft pivotally supported by ball bearings, the electric motor is rotated at a very low speed or in an intermittent manner when an automobile is traveling and the auxiliary oil pump is not used. According to the configuration, the electric motor is slightly rotated during when the automobile is traveling, whereby impressions are prevented from being formed on the ball bearings.Type: GrantFiled: September 22, 2004Date of Patent: March 3, 2009Assignee: JTEKT Co., Ltd.Inventors: Takatoshi Sakata, Yasuhiro Yukitake, Yasuo Asai, Kouji Yoshinami
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Patent number: 7385366Abstract: The method for controlling the hydraulic brushless motor operates the hydraulic brushless motor by switching the conduction timing to a plurality of switching elements. The method for controlling the hydraulic brushless motor includes detecting the oil temperature and advancing the conduction start timing when the oil temperature is lower than or equal to a predetermined value.Type: GrantFiled: September 19, 2006Date of Patent: June 10, 2008Assignee: JTEKT CorporationInventor: Yasuhiro Yukitake
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Publication number: 20080061645Abstract: A motor includes a rotor having a permanent magnet fitted thereon, and a stator having an inner peripheral surface spaced a predetermined distance from an outer peripheral surface of the rotor in opposed relation thereto, and the stator is press-fitted in a motor case to be fixed thereto with its outer peripheral surface. A plurality of projecting portions are formed on an inner peripheral surface of the motor case. Recess portions for engagement with the respective projecting portions are formed in the outer peripheral surface of the stator. When the stator is press-fitted into the motor case, the stator is fixed to the motor case with inner bottom surfaces of the recess portions serving as press-fitting surfaces. The projecting portions of the motor case are engaged respectively in the recess portions of the stator, thereby preventing the rotation of the stator relative to the motor case.Type: ApplicationFiled: September 10, 2007Publication date: March 13, 2008Applicant: JTEKT CORPORATIONInventor: Yasuhiro Yukitake
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Publication number: 20070200450Abstract: A stator of a motor according to the invention includes a stator core 1 annularly continued, a plurality of insulators each having a body part which is engaged with an outer peripheral surface of a tooth part of the stator core and a flange part which is projected at a distal end side of the tooth part, and a coil which is wound around the tooth part by way of the insulator. A first magnetic body is provided on a surface of the flange part of the insulator opposed to a rotor, in a state magnetically connected to the tooth part.Type: ApplicationFiled: February 23, 2007Publication date: August 30, 2007Applicant: JTEKT CORPORATIONInventor: Yasuhiro Yukitake
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Publication number: 20070182259Abstract: In an electric pump unit in which a single shaft (main shaft) functions both as a rotation shaft of a pump section and that of a motor section, a rotor of a motor has a structure in which a magnet is embedded in a rotor core (IPM structure). According to the configuration, in the electric pump unit of the invention, it is not required to dispose a protective ring in the periphery of the rotor core. In addition, rotation of the main shaft can be supported by the inner-diameter face of the stator core. Accordingly, the electric pump unit of the invention can be configured as an electric pump unit which is lighter, more compact, and more economical as compared with a conventional product.Type: ApplicationFiled: February 15, 2005Publication date: August 9, 2007Inventors: Takatoshi Sakata, Yasuo Asai, Yasuhiro Yukitake, Kouji Yoshinami
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Publication number: 20070145835Abstract: To provide a motor control apparatus, including a rotational number detecting means for detecting the rotational number of a motor; a current detecting means for detecting a motor current; a voltage detecting means for detecting an impressed voltage to be supplied to a motor; a temperature estimating means for obtaining a motor temperature from the rotational number of a motor, the motor current, and the impressed voltage; and a protection signal generating means for generating an operational signal in order to protect the motor when the obtained motor temperature exceeds a predetermined value.Type: ApplicationFiled: December 28, 2006Publication date: June 28, 2007Applicant: JTEKT CorporationInventor: Yasuhiro Yukitake