-
公开(公告)号：US20220063710A1
公开(公告)日：2022-03-03
申请号：US17419976
申请日：2019-12-13
Applicant: NSK LTD.
Inventor： Takahiro TSUBAKI , Hiroyasu KUMAGAI
Abstract: [Problem] An object of the present invention is to provide a steering apparatus for vehicles that easily obtains equivalent steering torques to a steering angle or the like without being affected by a road surface state and aging-changes of mechanism characteristics of a steering system.
[Means for solving the problem] A steering apparatus for vehicles that assists and controls a steering system comprises a torsional angle control section that calculates a motor current command value to make the torsional angle follow a target torsional angle; the torsional angle control section comprises a steering angle disturbance compensating section that calculates a first compensation motor current command value by performing filter processing to the detected steering angle, and the torsional angle control section performs compensation by the first compensation motor current command value in calculation of the motor current command value.-
公开(公告)号：US20210114653A1
公开(公告)日：2021-04-22
申请号：US16638607
申请日：2019-02-19
Applicant: NSK LTD.
Inventor： Takahiro TSUBAKI , Hiroyasu KUMAGAI
Abstract: A vehicle steering apparatus that obtains the appropriate steering torque to the steering angle without being affected by road surface state and changes of mechanical characteristics of the steering system due to aging. The steering apparatus includes a target steering torque generating section to generate a target steering torque, a converting section to convert the target steering torque into a target torsional angle, and a torsional angle control section to calculate a motor current command value so as to follow-up a torsional angle to the target torsional angle. The target steering torque generating section includes an offset correcting section to obtain the first torque signal from a characteristic depending on the set steering angle based on an offset value of the steering torque and outputs the first torque signal as a target steering torque. The steering apparatus drives and controls the motor based on the motor current command value.
-
公开(公告)号：US20210364043A1
公开(公告)日：2021-11-25
申请号：US17257154
申请日：2019-07-03
Applicant: NSK LTD.
Inventor： Naohiro HITOMI , Daisuke GUNJI , Hiroyasu KUMAGAI , Ricardo RODRIGUEZ LOPEZ
Abstract: A rolling bearing unit includes: an inner ring member having a recess on a first side in an axial direction, the recess being recessed toward a second side in the axial direction; an outer ring member disposed on the outer periphery side of the inner ring member; a rolling body disposed between the inner ring member and the outer ring member and rotatably supporting the inner ring member with respect to the outer ring member; a transmitter capable of transmitting at least one of electric power or a signal, at least a part of the transmitter being accommodated inside the recess of the inner ring member; and a covering member that is supported by the first side of the outer ring member in the axial direction, covers the first side of the inner ring member in the axial direction, and fixes the transmitter.
-
Patent Agency Ranking
公开(公告)号：US20210254661A1
公开(公告)日：2021-08-19
申请号：US17262911
申请日：2019-07-22
Applicant: NSK LTD.
Inventor： Daisuke GUNJI , Hiroyasu KUMAGAI , Naohiro HITOMI , Ricardo RODRIGUEZ LOPEZ
Abstract: A rolling bearing unit includes: an inner ring member having a recess on a first side in an axial direction along a rotation axis, which is recessed toward a second side in the axial direction; an outer ring member on an outer peripheral side of the inner ring member; a rolling body between the inner ring member and the outer ring member; a non-contact transmitter using electric field coupling capable of transmitting at least one of an electric power or a signal and including a stationary-side transmission part including a stationary-side electrode and a rotary-side transmission part including a rotary-side electrode facing the stationary-side electrode; and a covering member supported by the first side of the outer ring member in the axial direction, covering the first side of the inner ring member in the axial direction, and fixing the stationary-side transmission part to the first side in the axial direction.
-
公开(公告)号：US20220411045A1
公开(公告)日：2022-12-29
申请号：US17606791
申请日：2021-03-17
Applicant: NSK LTD.
Inventor： Hiroyasu KUMAGAI , Daisuke GUNJI
Abstract: A propellant force generator is provided having the size in the axial direction of a rotational shaft of a motor reduced while making the pitch angles of rotational blades driven by the motor variable. The propellant force generator includes a propellant-force generating motor adapted to generate a propellant force for rotational blades, a pitch varying motor adapted to generate a rotational motion for changing pitch angles of the rotational blades, a rotation-linear motion converting unit adapted to convert the rotational motion generated by the pitch varying motor into a linear motion, and a linear motion-rotation converting unit adapted to convert the linear motions converted by the rotation-linear motion converting unit into rotational motions. At least a part of the linear motion-rotation converting unit is located within the propellant-force generating motor.
-
公开(公告)号：US20200070891A1
公开(公告)日：2020-03-05
申请号：US16610317
申请日：2018-09-28
Applicant: NSK LTD.
Inventor： Daisuke GUNJI , Hiroyasu KUMAGAI
Abstract: A suspension operation system includes: a suspension that includes a plurality of links supporting a wheel, at least one or more of the links having an actuator increasing or decreasing its length in an axial direction; a control device that supplies a drive signal to the actuator to control operation of the suspension; and a suspension operation terminal that operates the suspension. The suspension operation terminal includes: a detector that detects operation input information to the suspension operation terminal; and a communicator that transmits information about a target posture of the wheel, the information being based on the operation input information, to the control device as an operation command. The control device includes: a first calculator that calculates the length of the actuator on the basis of the operation command; and a drive circuit that produces the drive signal on the basis of information from the first calculator.
-
公开(公告)号：US20190381847A1
公开(公告)日：2019-12-19
申请号：US16488482
申请日：2018-10-12
Applicant: NSK LTD.
Inventor： Hiroyasu KUMAGAI , Yasuyuki MATSUDA
IPC: B60G7/00 , B60G17/015
Abstract: An extension-retraction link includes: a stationary shaft having a tubular shape; a movable shaft that can slide with respect to the stationary shaft; and an actuator that has a bearing unit supporting a screw shaft and moves the movable shaft. The stationary shaft includes: first to fourth bushes in contact with first to fourth plane surfaces of the movable shaft, respectively; a first elastic member pressing the third bush to the third plane surface; and a second elastic member pressing the fourth bush to the fourth plane surface. The bearing unit includes: a bearing in contact with the screw shaft; a bearing holder that fits in a mounting groove provided to the stationary shaft and holds the bearing; and a third elastic member located between a bottom surface of the mounting groove and the bearing holder.
-
8.发明申请公开(公告)号：US20160248351A1
公开(公告)日：2016-08-25
申请号：US15145858
申请日：2016-05-04
Applicant: NSK LTD.
Inventor： Takayoshi SUGAWARA , Yousuke IMAMURA , Hiroyasu KUMAGAI
CPC classification number: H02P6/10 , B62D5/046 , B62D5/0472 , H02P6/15 , H02P6/28 , H02P21/22 , H02P23/14
Abstract: A multi-phase motor control apparatus that reduces the occurrence of the vibrations and the noises by setting the shift amount per time more finely after realizing a reduction in processing ability of a CPU by using a one-shunt type current detection circuit and an electric power steering apparatus using the same. The apparatus includes a PWM-signal generating section that generates plural second each-phase PWM-signals within two control periods based on the current estimation value and the carrier signal, and in a case that a phase shift amount of a predetermined phase in a just before control period is zero and a phase shift amount of a predetermined phase in a present control period is not zero, the phase shift control section gradually increases the phase shift amount from zero in the present control period and a next control period, and uses the second each-phase PWM-signals in the next control period.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.015 seconds)
