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公开(公告)号：US20220316599A1
公开(公告)日：2022-10-06
申请号：US17596915
申请日：2020-06-18
申请人： NSK LTD.
发明人： Seiichi MORIYAMA
摘要： To provide a dust cover capable of maintaining a state in which a first flexible part and a second flexible part of a bellows are fitted onto a mounting member. A dust cover includes a bushing, a bellows, and a mounting member. The mounting member has a main body and a flange part.
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公开(公告)号：US20220297757A1
公开(公告)日：2022-09-22
申请号：US17634629
申请日：2021-04-07
申请人： NSK LTD.
摘要： A rotation angle detection device including: an angular position calculation unit configured to calculate angular position information representing an angular position of the motor rotation shaft based on a first sensor signal of the first sensor; an rotation number detection unit configured to detect a rotation number of the motor rotation shaft based on a second sensor signal of a second sensor and outputs rotation number information representing the rotation number; a rotation angle calculation unit configured to calculate rotation angle information indicating a rotation angle of the motor rotation shaft based on the angular position information and the rotation number information; and a power supply unit configured to stop supplying power to the first sensor, the angular position calculation unit and the rotation angle calculation unit and to supply power to the second sensor and the rotation number detection unit when the power switch is off.
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公开(公告)号：US20220268331A1
公开(公告)日：2022-08-25
申请号：US17624896
申请日：2020-09-23
申请人： NSK Ltd.
发明人： Nagao DOHI , Yuya DAIKOKU , Tomoyuki MIYAZAKl
摘要： The reverse input cutoff clutch includes: a pressed member having a pressed surface around the inner peripheral surface; an input member coaxially arranged with the pressed surface and having an input-side engaging portion arranged on the radially inner side of the pressed surface; an output member coaxially arranged with the pressed surface and having an output-side engaging portion arranged further on the radially inner side than the input-side engaging portion; and an engaging element arranged so as to be movable in a first direction as a direction toward or away from the pressed surface on the radially inner side of the pressed surface. The engaging element has a main engaging element body having a pressing surface and a pivot-support shaft, and a link member. The link member has a first end portion pivotally linked to the pivot-support shaft, and a second end portion pivotally linked to the input-side engaging portion.
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公开(公告)号：US20220268316A1
公开(公告)日：2022-08-25
申请号：US17631178
申请日：2021-04-07
申请人： NSK Ltd.
发明人： Hirofumi ITO , Takahito SHIMADA , Masahide NATORI , Hideyuki HIDAKA , Hayato ISHIGAMI , Hiroki KOMATA
摘要： A method for measuring indentation resistance includes: obtaining a first curve indicating a yield shear stress in a depth direction of a raceway surface of a material forming a rolling bearing in a state before the raceway surface is subjected to machining, a second curve indicating a static shear stress in the depth direction of the raceway surface in a state in which the raceway surface is subjected to the machining, and a third curve indicating a static shear stress in the depth direction of the raceway surface in a state in which rolling elements are in contact with the raceway surface and a static load is applied to the raceway surface; and obtaining a correlation between an area and an indentation depth of the raceway ring by defining a region surrounded by exceeding the first curve and the second curve and falling below the third curve as the area.
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公开(公告)号：US11415205B2
公开(公告)日：2022-08-16
申请号：US17058840
申请日：2019-05-31
申请人： NSK LTD.
发明人： Keitaro Oka
摘要： A piece type ball screw in a screw shaft with a spiral external thread groove on an outer peripheral surface, a nut which is fitted onto the screw shaft and has a spiral internal thread groove on an inner peripheral surface, a plurality of balls rotatably arranged in a track path formed between the external thread groove and the internal thread groove, and a piece member which is attached to the nut and connects the internal thread grooves to each other. The piece member includes a piece body in which a return groove connecting the internal thread grooves is formed and a pair of engaging portions which are provided on the piece body, extend in opposite directions in a circumferential direction of the nut, and engage with the internal thread groove of the nut. A joint portion between the piece body and the engaging portion has a fillet shape.
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公开(公告)号：US11352053B2
公开(公告)日：2022-06-07
申请号：US17287778
申请日：2020-10-21
申请人： NSK LTD.
发明人： Toru Sakaguchi , Tetsuya Kitazume , Shoya Maruyama
摘要： A turning control device includes: a target steering angle calculation unit configured to calculate a target steering angle of a turning mechanism, based on a second steering angle of a steering mechanism; a steering angular displacement calculation unit configured to, when a third steering angle, the third steering angle being either a first steering angle of the turning mechanism or the second steering angle, is in a range from a maximum steering angle that the third steering angle can take to a first threshold steering angle, calculate a steering angular displacement of the third steering angle with the first threshold steering angle used as a reference; a steering angle correction value calculation unit configured to calculate a steering angle correction value according to at least the steering angular displacement; and a corrected target steering angle calculation unit configured to correct the target steering angle with the steering angle correction value.
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公开(公告)号：US11345387B2
公开(公告)日：2022-05-31
申请号：US16952837
申请日：2020-11-19
申请人： NSK LTD.
发明人： Yoshifumi Kurokawa , Jessica Elaine Lipa , Victor Corona Martinez , Juan Antonio Hernandez Otero
IPC分类号： B62D1/18 , B62D1/181 , B62D1/183 , B62D1/184 , B62D1/185 , B62D1/187 , B62D6/00 , F16B7/14 , F16B7/18 , F16B7/20
摘要： In an electrically adjustable steering of the present embodiment, a first telescopic actuator is disposed between a top bracket or a mount bracket on a vehicle body side and a steering jacket. The steering jacket includes a plurality of jacket members that overlap each other so as to be able to expand and contract in an axial direction. A motor of the first telescopic actuator is fixed to the top bracket or the mount bracket on the vehicle body side.
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公开(公告)号：US20220161851A1
公开(公告)日：2022-05-26
申请号：US17670925
申请日：2022-02-14
申请人： NSK LTD.
摘要： A calibration method in which, a rotation angle calculation device (20, 30) calculates (S2) a rotation angle θc based on a detection signal of a sensor, transmits (S3) rotation angle data Dc indicating the rotation angle θc to a calibration device (40), and transmits (S3) time difference data Dt relating to a time difference after having captured the detection signal until transmitting the rotation angle data to the calibration device, and in which the calibration device measures (S1) a rotation angle θr, clocks (S1, S4) a measurement time tm at which the rotation angle θr is measured and a transmission time tt of transmitting or receiving the rotation angle data, and acquires (S5, S6) calibration data Dc of the rotation angle data by comparing the rotation angle θr measured at a time tc2 obtained by going back in time from the transmission time tt by the time difference after having captured the detection signal until transmitting the rotation angle data and the rotation angle data Da with each other.
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公开(公告)号：US20220143679A1
公开(公告)日：2022-05-12
申请号：US17427397
申请日：2020-02-20
申请人： NSK LTD.
发明人： Nobuyuki HAGIWARA
摘要： A method of manufacturing a hub unit bearing (1) includes the step of applying an axial load to a shaft end of a hub body (21) so that a staking portion (26) for inner races (22a, 22b) is formed in the hub body (21). The load is adjusted based on at least one of first information acquired before applying the load and second information acquired while applying the load.
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公开(公告)号：US20220135120A1
公开(公告)日：2022-05-05
申请号：US17435248
申请日：2020-12-16
申请人： NSK LTD.
摘要： A phase adjustment method for a rotation angle sensor configured to detect a rotation angle of a rotor of a brushless motor, the phase adjustment method including: measuring a first rotation speed and a second rotation speed when the brushless motor is driven with a same torque command current to rotate clockwise and counterclockwise, respectively, on a basis of the rotation angle of the rotor detected by the rotation angle sensor; and calculating a correction value to correct a phase of the rotation angle sensor so that a rotation speed difference between the first rotation speed and the second rotation speed decreases.
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