公开(公告)号：US12012165B2

公开(公告)日：2024-06-18

申请号：US17787088

申请日：2021-10-29

Applicant: NSK LTD.

Inventor： Tetsuya Kitazume

IPC: B62D6/08 ,  B62D6/10

CPC classification number: B62D6/08

Abstract: 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.

公开(公告)号：US20240167546A1

公开(公告)日：2024-05-23

申请号：US18284167

申请日：2022-03-04

Applicant: NSK LTD.

Inventor： Kenichiro WADA

IPC: F16H25/22 ,  F16H25/20

CPC classification number: F16H25/2204 ,  F16H25/2015 ,  F16H2025/204 ,  F16H2025/2075

Abstract: 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.

公开(公告)号：US11965582B2

公开(公告)日：2024-04-23

申请号：US17428492

申请日：2020-01-15

Applicant: NSK Ltd.

Inventor： Ryou Oosawa ,  Satoshi Ishikuri ,  Haruhiko Kiyota ,  Souta Matsumoto ,  Toru Ishii ,  Hiroyuki Sugawara

IPC: F16H1/16 ,  B62D5/04 ,  F16H57/022 ,  F16H57/12

CPC classification number: F16H1/16 ,  B62D5/0409 ,  B62D5/0454 ,  F16H57/022 ,  F16H57/12 ,  F16H2057/127

Abstract: A worm reducer has: a housing having a wheel housing portion and a worm housing portion; a worm wheel; a worm, a support bearing having an inner ring externally fitted to the tip end portion of the worm and an outer ring; an elastic biasing means elastically biasing the outer ring toward the worm wheel side; and an elastic holding means elastically holding the outer ring from both sides in a direction orthogonal to a biasing direction by the elastic biasing means and to a center axis of the worm housing portion.

公开(公告)号：US11964713B2

公开(公告)日：2024-04-23

申请号：US17595568

申请日：2020-05-25

Applicant: NSK Ltd.

Inventor： Kenji Mori ,  Sakiya Watanabe

IPC: B62D6/00 ,  B62D6/02

CPC classification number: B62D6/002 ,  B62D6/008 ,  B62D6/02

Abstract: A vehicle steering device capable of stabilizing behavior of a vehicle when traveling backward. The device includes a reaction force device configured to apply steering reaction force to a wheel, a drive device configured to turn tires in accordance with steering of the wheel, and a control unit configured to control the reaction force device and the drive device. The control unit includes a turning ratio map unit configured to set a turning ratio gain in accordance with the vehicle speed of a vehicle, and a target turning angle generation unit configured to generate a target turning angle by multiplying the steering angle of the wheel by the turning ratio gain. The turning ratio gain at backward traveling of the vehicle is equal to or larger than the turning ratio gain at forward traveling of the vehicle.

公开(公告)号：US20240109580A1

公开(公告)日：2024-04-04

申请号：US18275515

申请日：2022-02-02

Applicant: NSK LTD.

Inventor： Suguru SUGISHITA ,  Hirotaka SHIMIZU ,  Kouhei TAKEISHI

IPC: B62D1/20

CPC classification number: B62D1/20

Abstract: A steering device includes: a steering shaft which extends along a central axis and to which a steering wheel is coupled on one side in an axial direction; a tubular steering column which is disposed on an outer circumferential side of the steering shaft and extends in the axial direction; and a gearbox which is disposed on the other side in the axial direction of the steering column and is fixed to the steering column. The steering column includes a fixing member provided at an end on the other side in the axial direction and fixed to the gearbox, and an outer circumferential surface on one side in the axial direction of the fixing member has an outer diameter which increases toward the other side in the axial direction.

公开(公告)号：US11933365B2

公开(公告)日：2024-03-19

申请号：US18036311

申请日：2021-08-16

Applicant: NSK LTD.

Inventor： Nobuyuki Hagiwara

IPC: F16C43/04 ,  B21D53/10 ,  B21D53/26 ,  B60B27/00

CPC classification number: F16C43/04 ,  B21D53/10 ,  B21D53/265 ,  B60B27/0078

Abstract: A producing method of a bearing unit includes: a step of measuring torque of a first bearing unit under each of a plurality of load conditions during production of the first bearing unit; a step of determining a target value of each of a plurality of production parameters based on of a load-torque relationship obtained from measurement results of the torque; and a step of producing a second bearing unit on the basis of the target value of each of the plurality of production parameters.

公开(公告)号：US11920667B2

公开(公告)日：2024-03-05

申请号：US17434846

申请日：2020-01-08

Applicant: NSK LTD.

Inventor： Kouhei Dobashi

IPC: F16H53/06 ,  F16H25/08 ,  F16H25/14 ,  F16H53/02

CPC classification number: F16H53/06 ,  F16H25/14 ,  F16H53/02

Abstract: A cam device includes a cam, a cam roller, a rotary drive device, a linear motion guide device, and an action unit. A cam profile of the cam includes a rotary end at a circumferential one end, at which a camshaft is non-rotatable in a reverse direction by the cam roller, a cam surface from the rotary end to the circumferential other end, on which the cam roller is abuttable, and formed of a single CV curve from a vicinity of the rotary end to the circumferential other end of the cam surface, and a non-continuous section formed between the rotary end and the circumferential other end of the cam surface and not in contact with the cam roller.

公开(公告)号：US20240067248A1

公开(公告)日：2024-02-29

申请号：US18270451

申请日：2022-05-19

Applicant: NSK Ltd.

Inventor： Ko FUJIOKA

IPC: B62B5/00 ,  F16H1/14

CPC classification number: B62B5/0043 ,  F16H1/14

Abstract: A drive wheel, comprising: a first input shaft and a second input shaft coaxially disposed; a first output shaft and a second output shaft disposed on different axes; a first spur gear mechanism that transmits rotational force of the first input shaft to the first output shaft; a second spur gear mechanism that transmits rotational force of the second input shaft to the second output shaft; a wheel connected to an axle; a pivot shaft that supports the wheel in a pivotable manner via the axle; a first power conversion mechanism that transmits the rotational force of the first output shaft to one end portion of the axle; a second power conversion mechanism that transmits the rotational force of the second output shaft to another end portion of the axle; a first slide mechanism; a second slide mechanism; and an elastic member.

公开(公告)号：US11912333B2

公开(公告)日：2024-02-27

申请号：US17915293

申请日：2021-03-25

Applicant: NSK LTD.

Inventor： Tomohiro Ikuta ,  Yoshiyuki Sato ,  Suguru Sugishita ,  Hirotaka Shimizu

IPC: B62D1/184 ,  B62D1/185

CPC classification number: B62D1/184 ,  B62D1/185

Abstract: A steering device includes a steering shaft, a steering column, a bracket, and a fastening mechanism. An upper column includes a clamp, a cylindrical part, a pair of protrusions, and contact ribs. The clamp includes a continuous clamp and a spaced clamp. The protrusions include a continuous protrusion and a spaced protrusion. The contact ribs include first contact ribs disposed each of which is disposed on the outer peripheral surface of the clamp, second contact ribs each of which is disposed on a side surface of the protrusion and disposed opposite to the first contact rib with respect to a long groove, and at least one third contact rib disposed on a side surface of the spaced protrusion and between the first contact rib and the long groove. The third contact rib has a protrusion amount greater than those of the first contact rib and the second contact rib.

公开(公告)号：US20240060532A1

公开(公告)日：2024-02-22

申请号：US18271257

申请日：2022-01-13

Applicant: NSK Ltd.

Inventor： Tsutomu OHKUBO

IPC: F16C29/06

CPC classification number: F16C29/06

Abstract: A linear motion guide device having a long-life slider is provided. The linear motion guide device includes a guide rail, a plurality of rolling elements, and a slider. The material of the slider body 11 is alloy steel containing 0.1 mass % or more and less than 0.3 mass % of C, 0.5 mass % or more and 1.5 mass % or less of Cr, and 0.1 mass % or more and 0.4 mass % or less of Si, with the balance being Fe and inevitable impurities. An amount of retained austenite in a surface layer 14F of a slider-side rolling groove 14 subjected to a carburizing heat treatment is 15 vol % or more and 45 vol % or less. The surface hardness of the slider-side rolling groove 14 is Hv 650 or more.