Patents Assigned to NSK Ltd.
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Patent number: 12017233Abstract: Provided is a nozzle structure, a blow device, and a manufacturing method for parts, a bearing, a linear motion device, a steering device, a vehicle, and a mechanical device which can uniformly and satisfactorily perform various processes with fluid over a wide range on a processing target member. The nozzle structure includes an inner member, an outer member surrounding the inner member, and a laminar flow path formed between an outer surface of the inner member and an inner surface of the outer member to allow fluid to flow. The blow device or the mechanical device having the nozzle structure can process the inner member by flowing the fluid in the flow path.Type: GrantFiled: July 18, 2018Date of Patent: June 25, 2024Assignee: NSK LTD.Inventor: Kouhei Dobashi
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Patent number: 12017310Abstract: Axial relative movement of an auxiliary member (30) and a hub body (22z) is performed, the hub body (22z) and an inner race (21) are combined with each other in an axial direction, and a part of the hub body (22z) deformed by a blade (33) of the auxiliary member (30) is disposed inside an engagement concave portion (26) of the inner race (21).Type: GrantFiled: February 5, 2020Date of Patent: June 25, 2024Assignee: NSK LTD.Inventors: Nobuyuki Hagiwara, Sonji Ryu
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Publication number: 20240200617Abstract: The efficiency of assembling a reverse-input blocking clutch including an elastic member is improved. A reverse-input blocking clutch 1 includes a pressed member 2 having a pressed surface 7, an input member 3 having an input-side engaging portion 22, an output member 4 having an output-side engaging portion 33, an engaging element 5 having a pressing surface 45, an input-side engaged portion 50, and an output-side engaged portion and arranged between the pressed surface 7 and the output-side engaging portion 33 with respect to a first direction which is a direction of moving toward or away from the pressed surface 7, an elastic member 6 that elastically urge the pressing surface 45 toward the pressed surface 7 in the first direction, and a displacement prevention means for preventing relative displacement in the axial direction of the engaging element 5 with respires to the output member 4.Type: ApplicationFiled: December 27, 2022Publication date: June 20, 2024Applicant: NSK Ltd.Inventors: Nagao DOHI, Shohei KANEKO
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Patent number: 12013307Abstract: A method for diagnosing a rolling device (10) including an outer member (1), an inner member (3), and rolling elements (5) includes: applying an AC voltage to an electric circuit including the outer member (1), the rolling elements (5), and the inner member (3); measuring an impedance and a phase angle of the electric circuit when the AC voltage is applied; and measuring a dielectric constant of a lubricant at least one of between the outer member (1) and the rolling elements (5) and between the inner member (3) and the rolling elements (5) based on the measured impedance and the measured phase angle.Type: GrantFiled: January 10, 2020Date of Patent: June 18, 2024Assignee: NSK LTD.Inventors: Taisuke Maruyama, Masayuki Maeda, Ken Nakano
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Patent number: 12012165Abstract: Provided is a control device for an electric power steering device including a first control portion that derives a first command value based on a steering torque and a second control portion that derives a second command value based on a target command value for a driving support function, where the first control portion generates the first command value by extracting a command value corresponding to a vibration suppression component from a command value including the vibration suppression component derived from the steering torque, adjusting the derived command value according to an operating state of a function of the second control portion, and adding the extracted command value to the adjusted command value.Type: GrantFiled: October 29, 2021Date of Patent: June 18, 2024Assignee: NSK LTD.Inventor: Tetsuya Kitazume
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Publication number: 20240191789Abstract: A multi-row ball screw includes a nut having a plurality of spiral grooves on an inner peripheral surface thereof, a screw shaft having a plurality of spiral grooves on an outer peripheral surface thereof, and a plurality of balls disposed so as to be rollable on rolling paths constituted by the plurality of spiral grooves of the nut and the plurality of spiral grooves of the screw shaft. The spiral groove of the nut includes a U-shaped first spiral groove having left and right flanks that are respectively able to come into contact with two-row balls and separated from each other in an axial direction, and two second spiral grooves continuous with each row of the first spiral groove and each having left and right flanks that are able to come into two-point contact with the ball.Type: ApplicationFiled: March 23, 2022Publication date: June 13, 2024Applicant: NSK LTD.Inventor: Takayuki YABE
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Patent number: 12009766Abstract: A motor control device includes temperature detection elements that are mounted on a circuit board on which a first power conversion circuit and a second power conversion circuit are mounted and are arranged at a position between the first power conversion circuit and the second power conversion circuit.Type: GrantFiled: March 3, 2023Date of Patent: June 11, 2024Assignee: NSK LTD.Inventor: Akio Maruhashi
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Publication number: 20240183434Abstract: A nut of a ball screw is formed with, in a notch portion, an elongated hole that penetrates in a radial direction, and whose longitudinal direction is formed along a lead angle and parts of both longitudinal side surfaces parallel to each other guide balls. A circulation part includes: a first circulation component that is disposed in the notch portion so as to abut against a bottom wall surface of the notch portion and has a tongue portion accommodated in the elongated hole; a second circulation component that is disposed in the notch portion so as to cover the first circulation component and accommodated in the elongated hole, and has a wall portion facing the tongue portion; and a higher strength pipe that is disposed in an abutting surface where the first and second circulation components abut against each other, constitutes a part of a ball circulation path.Type: ApplicationFiled: March 25, 2022Publication date: June 6, 2024Applicant: NSK LTD.Inventor: Takayuki YABE
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Publication number: 20240183400Abstract: In a multi-row bearing, an inner ring raceway groove at one end portion in an axial direction is formed over groove shoulders on both sides in the axial direction with respect to a groove bottom, and an inner ring raceway groove at an intermediate portion in the axial direction is formed over a groove shoulder on one side in the axial direction from a groove bottom. In addition, an outer ring raceway groove at the other end portion in the axial direction is formed over groove shoulders on both sides in the axial direction with respect to a groove bottom, and an outer ring raceway groove at the intermediate portion in the axial direction is formed over a groove shoulder on one side in the axial direction from a groove bottom.Type: ApplicationFiled: March 29, 2022Publication date: June 6, 2024Applicant: NSK LTD.Inventor: Takayuki YABE
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Publication number: 20240183750Abstract: Disclosed are a state monitoring device and a state monitoring method for a ball screw, which enable appropriate collection of data to accurately diagnose the state of the ball screw. The state monitoring device monitors the state of the ball screw having a screw shaft, a nut, and a plurality of balls. The state monitoring device includes a drive control unit for controlling a drive unit (servo motor) to cause the screw shaft and the nut to move relative to each other at a constant speed for one or more reciprocating motions under an unloaded condition, and a data collection unit for collecting, as data, physical quantities related to the ball screw while the drive unit is controlled by the drive control unit.Type: ApplicationFiled: April 13, 2021Publication date: June 6, 2024Applicant: NSK LTD.Inventors: Keisuke MATSUMURA, Satoshi HASHIMOTO, Yuki YAMADA
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Patent number: 11993303Abstract: A steering device includes a telescopic steering shaft that extends in a first direction, and a cylindrical outer steering column that rotatably supports the steering shaft. The steering column includes a lower column and an upper column having one end slidably attached to the lower column and the other end on which a bearing that supports the steering shaft is provided. The upper column includes a clamp that is externally slidably fitted to the lower column and that has a slit extending in the first direction, and a cylindrical part that has a cylindrical shape and that has one end continuous with the clamp and the other end blocked by the bearing being internally fitted. The cylindrical part has an air hole that is spaced apart from the one end of the cylindrical part and that penetrates an outer peripheral surface and an inner peripheral surface of the cylindrical part.Type: GrantFiled: March 25, 2021Date of Patent: May 28, 2024Assignee: NSK LTD.Inventors: Tomohiro Ikuta, Yoshiyuki Sato, Suguru Sugishita, Hirotaka Shimizu
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Publication number: 20240165753Abstract: A method of manufacturing a ball screw device includes a nut unit preparation step, a screw shaft preparation step, and an assembly step. In the nut unit preparation step, a nut unit is prepared in which a circulation component, a ball, and a temporary shaft that prevents the ball from falling off are assembled to a nut provided with an inner peripheral track surface. In the screw shaft preparation step, a screw shaft provided with an outer peripheral track surface is prepared. In the assembly step, after the nut unit preparation step and the screw shaft preparation step, the temporary shaft of an arbitrary nut unit is replaced with an arbitrary screw shaft to manufacture the ball screw device.Type: ApplicationFiled: February 2, 2022Publication date: May 23, 2024Applicant: NSK Ltd.Inventors: Wei XU, Takayuki YABE, Toshiaki SUZUKI
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Publication number: 20240167512Abstract: Provided are: an environment-friendly synthetic resin cage that uses a 100% biomass raw material and therefore aims for carbon neutrality while having performance as a bearing in a conventional process; and a rolling bearing incorporating said cage. A crown-type cage for holding a plurality of rolling elements incorporated between an inner ring and an outer ring is produced with a polyamide resin composition containing a 100% biomass-derived raw material with a reinforcing material contained therein, wherein the raw material is polyamide 410 and 10-40 wt % of the reinforcing material is contained therein.Type: ApplicationFiled: January 25, 2023Publication date: May 23, 2024Applicant: NSK LTD.Inventors: Taiki YOSHIMA, Yoshitaka NAGANUMA
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Publication number: 20240167546Abstract: A table device includes a ball screw including a male screw member extending in an axial direction and a female screw member meshing with the male screw member and movable in the axial direction according to rotation of the male screw member, a slide device that movably supports the female screw member, and a fixing member to which the slide device is fixed. The fixing member includes a first wall section extending in a first direction and a second wall section extending in a second direction crossing the first direction in a cross section including an axis of the male screw member.Type: ApplicationFiled: March 4, 2022Publication date: May 23, 2024Applicant: NSK LTD.Inventor: Kenichiro WADA
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Publication number: 20240158001Abstract: [Problem] An object of the present invention is to provide a control apparatus of a steering system for vehicles that precisely compensates an influence of the friction generated in the turning mechanism and enables a vehicle to respond properly.Type: ApplicationFiled: February 3, 2022Publication date: May 16, 2024Applicant: NSK LTD.Inventors: Takahiro TSUBAKI, Ryo MINAKI
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Publication number: 20240159276Abstract: A resolver integrated-type bearing device includes a bearing configured to rotatably support a rotating shaft with respect to a housing, a rotor attached to the rotating shaft, and a stator disposed radially outward of the rotor with a gap therebetween. A stator core of the stator is integrally attached to the bearing.Type: ApplicationFiled: March 11, 2022Publication date: May 16, 2024Applicant: NSK LTD.Inventors: Satoshi KATTO, Yasuhiro IWANAGA
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Publication number: 20240159623Abstract: A vibration diagnosis device is configured to diagnose vibration of a diagnosis target on the basis of an input signal from outside. The vibration diagnosis device includes a vibration sensor configured to detect the vibration of the diagnosis target, a filtering unit configured to extract a prescribed wavelength band from a waveform of a signal detected by the vibration sensor, and an arithmetic processing unit configured to apply a frequency analysis to the filtered waveform, which is obtained by the filtering unit, to generate spectral data. When, on the basis of the input signal, the arithmetic processing unit does not generate the spectral data, the arithmetic processing unit calculates at least one fundamental vibration statistic from the waveform of the signal detected by the vibration sensor and diagnoses the presence/absence of an abnormality of the diagnosis target.Type: ApplicationFiled: February 10, 2022Publication date: May 16, 2024Applicant: NSK LTD.Inventors: Yasushi MUTOH, Fumiko OHFUJI
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Patent number: 11982325Abstract: A distance between a rotation center of an input member and a contact portion between an input side engaging portion and an input side engaged portion in a second direction is set to be shorter than a distance between a rotation center of an output member and a contact portion between an output side engaging portion and an output side engaged portion in the second direction. In a locked or semi-locked state, a contact portion between the output side engaging portion and the output side engaged portion is located on the side closer to the rotation center of the output member in a first direction in relation to a virtual line connecting the rotation center of the output member and a contact portion between one pressing surface of the pair of pressing surfaces and the pressed surface.Type: GrantFiled: October 28, 2022Date of Patent: May 14, 2024Assignee: NSK LTD.Inventors: Nagao Dohi, Shohei Kaneko
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Patent number: 11982319Abstract: The torque transmission shaft has a shaft having a hollow tubular shape and a clamp. The shaft has a connecting portion integral with the shaft at one axial end portion, a slit extending in the axial direction in a portion on the other axial end side and opens on the other side in the axial direction, and a female serration on the inner circumferential surface of the other axial end portion. The clamp is separate from the shaft and has a non-continuous portion at one location in the circumferential direction, a pair of flange portions on both sides of the non-continuous portion, and a connecting portion connecting the pair of flange portions in the circumferential direction. The clamp is externally fitted and fixed to the other axial end portion of the shaft and reduces the diameter of the other axial end side portion of the shaft.Type: GrantFiled: November 18, 2019Date of Patent: May 14, 2024Assignee: NSK Ltd.Inventors: Seiichi Moriyama, Keisuke Nakao
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Patent number: D1031548Type: GrantFiled: February 3, 2022Date of Patent: June 18, 2024Assignee: NSK LTD.Inventor: Kazuhiro Ohira
