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公开(公告)号：US11420671B2
公开(公告)日：2022-08-23
申请号：US16891860
申请日：2020-06-03
申请人： JTEKT CORPORATION
发明人： Hideya Kato , Takuya Nakayama , Eiji Yamazaki
摘要： A ball screw nut has a pair of through holes and a first passage that allows the through holes to communicate with each other and that opens radially outward. In each of the through holes, a ball screw mechanism has a circulation member having a second passage in which a ball can move between a ball raceway and the first passage. The ball screw mechanism has a circulation path for communicating the two connection points set on the ball raceway by the first passage and each of the second passages. A driven pulley has a thin portion that defines a radial clearance between an inner periphery of the driven pulley and an outer periphery of the ball screw nut. The ball screw mechanism has a pressing lid that presses down each of the circulation members from the outer periphery of the ball screw nut and that covers the first passage.
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公开(公告)号：US11413971B2
公开(公告)日：2022-08-16
申请号：US16664999
申请日：2019-10-28
申请人： JTEKT CORPORATION
发明人： Kenichi Kozuka , Masato Oda
摘要： Provided are a power supply circuit and a motor control device configured to suppress complexity in management of the power supply circuit. A switching unit acquires identification information that is information corresponding to a type of a torque sensor. Based on the acquired identification information, the switching unit outputs either a reference voltage or a power supply voltage as a standard voltage. A voltage application unit applies to the torque sensor an operation voltage in accordance with a type of the torque sensor based on the power supply voltage or the reference voltage that is the standard voltage of the voltage application unit and that is applied by the switching unit.
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公开(公告)号：US20220226946A1
公开(公告)日：2022-07-21
申请号：US17646730
申请日：2022-01-03
申请人： JTEKT CORPORATION
发明人： Yoshio OOTSUKA
IPC分类号： B23Q1/52
摘要： There is provided a rotary table device including: a rotary table; a center shaft erected toward the rotary table; a housing including an inner peripheral surface having a circular cross section over a predetermined range along a rotation axis; a center sleeve including an outer peripheral surface having a circular cross section corresponding to the inner peripheral surface, and the outer peripheral surface being concentric with the inner peripheral surface; a plurality of recesses formed in at least one of the inner circumferential surface and the outer circumferential surface; a plurality of O-rings disposed to be sandwiched between the inner peripheral surface and the outer peripheral surface; an in-housing fluid flow path formed inside the housing; and a plurality of in-sleeve fluid flow paths formed inside the center sleeve.
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公开(公告)号：US20220221004A1
公开(公告)日：2022-07-14
申请号：US17565855
申请日：2021-12-30
申请人： JTEKT CORPORATION
发明人： Toru KAMIYA
摘要： A lubricant supply device includes a porous body including a first porous portion and a second porous portion in contact with the first porous portion, the porous body being impregnated with a lubricant. A penetration depth of the lubricant in the second porous portion is larger than a penetration depth of the lubricant in the first porous portion.
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76.发明授权公开(公告)号：US11371568B2
公开(公告)日：2022-06-28
申请号：US17101473
申请日：2020-11-23
申请人： JTEKT CORPORATION
发明人： Ichiro Oda , Go Nagayama , Tomonori Ono , Takashi Kouzai
IPC分类号： F16D27/115 , B60K17/02 , F16D48/06
摘要： A driving force transmission device includes an input rotation member and output rotation member, a multiple-disc clutch, a pressing mechanism, and a control device that includes a current supply circuit. The control device is configured to compute a torque command value based on a state of a vehicle, the torque command value being a driving force that needs to be transmitted by the multiple-disc clutch, to compute a current command value, to correct the current command value, and to control the current supply circuit such that an electric current depending on the current command value is supplied to the pressing mechanism. The control device is configured to perform the correction so as to increase or decrease the current command value by a correction amount depending on a change rate of the torque command value.
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公开(公告)号：US20220186848A1
公开(公告)日：2022-06-16
申请号：US17456709
申请日：2021-11-29
申请人： JTEKT CORPORATION
发明人： Kazushi NUMAZAKI , Tetsuya KANEKO , Akira NAKANO , Kazuhiro TAKABAYASHI , Kazuo HANEDA , Yuya KIHARA
摘要： A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.
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公开(公告)号：US20220177025A1
公开(公告)日：2022-06-09
申请号：US17543216
申请日：2021-12-06
申请人： JTEKT CORPORATION
发明人： Yoshio Nakada
摘要： A vehicle steering system includes a rack shaft, a pinion shaft, a housing including a rack shaft receiving portion and a pinion shaft receiving portion, and a cover member disposed above the pinion shaft receiving portion. A part of the pinion shaft projects upward from an upper end opening of the pinion shaft receiving portion. The cover member includes a hood portion and an annular side wall portion. The pinion shaft is inserted through the hood portion. The side wall portion includes a valve portion capable of coming into abutment with an outer circumferential surface of the pinion shaft receiving portion.
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公开(公告)号：US11352048B2
公开(公告)日：2022-06-07
申请号：US16579351
申请日：2019-09-23
发明人： Kenichi Kozuka , Masato Oda , Tadashi Kawahara , Masashi Oki
摘要： A rotation detection device includes a rotation detection circuit, a step-up power supply circuit, a step-down power supply circuit, a first power supply path, and a second power supply path. The rotation detection circuit is configured to detect a rotation number of a motor that generates a torque applied to a steering mechanism of a vehicle, based on an electric signal. The electric signal is generated according to a rotation angle of the motor that is acquired through an in-vehicle sensor.
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公开(公告)号：US11338842B2
公开(公告)日：2022-05-24
申请号：US16531379
申请日：2019-08-05
申请人： JTEKT CORPORATION
发明人： Tomohiro Niwa , Satoru Mikamo , Masashi Fuji
摘要： An ECU independently controls power supply to two winding systems in a motor on a per-winding-system basis based on current command values each calculated for a corresponding winding system in accordance with a target assist torque. When a first winding system fails, the ECU transitions from a first state in which the ECU causes the winding groups of the two winding systems to produce the target assist torque to a second state in which the ECU causes the winding group of the other normal winding system to produce the target assist torque. If the current command value for the normal winding system is equal to or below a current threshold value that is set with reference to zero or a value close to zero when the failed winding system recovers to its normal state in the second state, the ECU transitions from the second state to the first state.
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