公开(公告)号：US20220266646A1

公开(公告)日：2022-08-25

申请号：US17636515

申请日：2021-01-25

Applicant: NSK LTD.

Inventor： Shin YAMAMOTO ,  Takahiro SUSHI ,  Cyou KYO ,  Mitsuru OIKE ,  Shunsuke SUZUKI

IPC: B60G17/015 ,  B60G15/04

Abstract: A suspension device has an upper shell having a stepped section around an inner circumferential surface; a lower shell; a ball screw shaft rotatably supported by the upper shell; a bearing unit arranged between a part of the ball screw shaft and the upper shell, and having an outer side part in a radial direction including a side surface that comes in contact with a side surface on the other side in the axial direction of the stepped section; a ball nut screwed on the ball screw shaft; an inner tube joined to the lower shell and the ball nut; an electric motor; and a coil spring, and a circumscribed circle diameter of the ball nut and the inner tube is less than an inner diameter dimension of the stepped section.

公开(公告)号：US20190283612A1

公开(公告)日：2019-09-19

申请号：US16334905

申请日：2017-09-15

Applicant: NSK LTD.

Inventor： Ryuho MORITA ,  Yasuyuki MATSUDA ,  Mitsuru OIKE ,  Daisuke GUNJI ,  Shin YAMAMOTO

IPC: B60L15/20 ,  B60K17/08 ,  B60K1/02 ,  B60K17/02 ,  B60K7/00 ,  B60K17/04 ,  F16H3/72

Abstract: An electric vehicle drive device includes: a first motor; a second motor; a transmission mechanism coupled to the first motor and the second motor; and a control unit configured to control operation of the first motor and the second motor based on a drive signal. The transmission mechanism includes: a sun gear shaft coupled to the first motor; a first planetary gear mechanism; a second planetary gear mechanism; and a one-way clutch configured to restrict a rotation direction of a first carrier to a predetermined positive rotation direction. The drive signal includes gear change information indicating a first state in which the second motor is controlled based on torque or a second state in which the second motor is controlled based on rotation speed, and throttle information indicating an acceleration of rotation speed of a wheel.

公开(公告)号：US20240239401A1

公开(公告)日：2024-07-18

申请号：US18684209

申请日：2023-06-13

Applicant: NSK Ltd.

Inventor： Shin YAMAMOTO ,  Atsushi MAEDA ,  Shohei KANEKO ,  Cyou KYO ,  Hideyuki SAITO

IPC: B62D5/04 ,  F16D43/21

CPC classification number: B62D5/043 ,  F16D43/211

Abstract: An actuator with reverse input blocking clutch has a function of switching the reverse input blocking clutch to a state in which torque can be transmitted between an input member and an output member, in a state in which reverse torque is input to the output member from an output-side mechanism, by applying torque to the input member by an actuator in an opposite direction to a direction of the reverse torque, and then by giving an instruction to the actuator to apply torque having a magnitude smaller than a magnitude of the reverse torque to the input member in the opposite direction, transmitting the reverse torque to the input member.

公开(公告)号：US20230311973A1

公开(公告)日：2023-10-05

申请号：US18043170

申请日：2021-08-31

Applicant: NSK LTD.

Inventor： Yuichiro TAGUCHI ,  Shin YAMAMOTO

IPC: B62D1/187 ,  B62D1/181

CPC classification number: B62D1/187 ,  B62D1/181

Abstract: A steering column device includes a steering column; and a telescopic actuator. The steering column includes a first column member, a second column member assembled to the first column member in a manner of being displaceable relative to the first column member in an axial direction, and a low-friction sliding member disposed between the first column member and the second column member. The telescopic actuator includes a telescopic motor, and displaces the second column member in the axial direction with respect to the first column member by using the telescopic motor as a drive source.

公开(公告)号：US20190389467A1

公开(公告)日：2019-12-26

申请号：US16316136

申请日：2017-09-15

Applicant: NSK LTD.

Inventor： Ryuho MORITA ,  Yasuyuki MATSUDA ,  Daisuke GUNJI ,  Mitsuru OIKE ,  Shin YAMAMOTO

IPC: B60W30/18 ,  F16H3/00 ,  F16H3/72 ,  F16H59/50 ,  F16H61/00 ,  B60W10/115 ,  B60W10/08 ,  B60K7/00

Abstract: An electric vehicle drive apparatus includes a first motor, a second motor, a speed change mechanism coupled to the first motor and the second motor, and a controller controlling operation of the first motor and the second motor. The speed change mechanism includes a first planetary gear mechanism, a second planetary gear mechanism, and a one-way clutch that limits a rotation direction of a first carrier of the first planetary gear mechanism to a certain forward rotation direction. When rotating the first motor in a backward rotation direction opposite to the certain forward rotation direction and rotating the second motor in the forward rotation direction, the controller determines rotation speeds of the first motor and the second motor within a range indicated by Expression (1).

公开(公告)号：US20190226906A1

公开(公告)日：2019-07-25

申请号：US16060588

申请日：2016-10-20

Applicant: NSK LTD.

Inventor： Shin YAMAMOTO ,  Yasuyuki MATSUDA ,  Masafumi HIKIDA ,  Fumiaki SODA ,  Hiroshi KAWAHARA

IPC: G01G19/10 ,  B60G15/06

Abstract: A vehicle weight measurement device includes an annular diaphragm (11) configured to cover an opening area (9d) of a groove portion (9c) of a mounting part (7) and to form a predetermined oil chamber (9) together with the groove portion. The diaphragm (11) is hermetically fixed by an inner collar (33) and an outer collar (35). The diaphragm (11) is pressed by a piston (43) configured to be moveable by a resilient force of a spring of a suspension device, and a pressure of a fluid to be measured R filled in the oil chamber, which is to be applied by the movement of the piston, can change. A pressure sensor (21) configured to communicate with the oil chamber and to detect a change in pressure of the fluid to be measured R filled in the oil chamber is provided.

公开(公告)号：US20190168605A1

公开(公告)日：2019-06-06

申请号：US16324753

申请日：2018-02-16

Applicant: NSK LTD.

Inventor： Shin YAMAMOTO ,  Yasuyuki MATSUDA

IPC: B60K7/00 ,  B60K17/04 ,  F16H57/02 ,  H02K7/00 ,  H02K7/08 ,  H02K7/116 ,  H02K11/215

Abstract: An electric vehicle drive device includes: a first motor; a second motor, and a transmission mechanism coupled to the first motor and the second motor and capable of switching a reduction ratio. The transmission mechanism includes a sun gear shaft coupled to the first motor. The first motor includes: a first stator core, a first rotor core disposed radially outward of the first stator core, and a first rotor holding member that couples the first rotor core and the sun gear shaft.

公开(公告)号：US20190058372A1

公开(公告)日：2019-02-21

申请号：US16077843

申请日：2017-02-15

Applicant: NSK LTD.

Inventor： Shin YAMAMOTO ,  Yasuyuki MATSUDA

IPC: H02K7/116 ,  F16H3/72 ,  H02K7/108 ,  H02K11/21

Abstract: A first motor includes a first member to be detected configured to rotate together with a first rotor core. A first rotation angle detector is coupled to the partition wall and faces the first member to be detected. A second motor includes a second member to be detected configured to rotate together with a second rotor core. A second rotation angle detector is coupled to the partition wall and facing the second member to be detected. A transmission mechanism is capable of switching a deceleration ratio. When seen from a direction of the rotation axis, a first line passing a root of the first signal line on a side of the first rotation angle detector and the rotation axis is overlapped with a second line passing a root of the second signal line on a side of the second rotation angle detector and the rotation axis.

公开(公告)号：US20180297399A1

公开(公告)日：2018-10-18

申请号：US15762801

申请日：2016-09-23

Applicant: NSK LTD.

Inventor： Yasuyuki MATSUDA ,  Masafumi HIKIDA ,  Tetsu TAKEHARA ,  Hiroshi KAWAHARA ,  Ryuho MORITA ,  Shin YAMAMOTO

IPC: B60B27/00 ,  B60B27/02 ,  B60R16/03 ,  B60R16/033 ,  F16C19/18 ,  H01Q1/32 ,  H02K11/00 ,  H02K7/18 ,  H02J7/14

Abstract: A vehicle wheel supporting rolling bearing unit includes a bearing part having a stationary side bearing ring member which is supported and fixed to a suspension device and non-rotatable in a use state and a rotation side bearing ring member which is coupled and fixed to a vehicle wheel and rotate together with the vehicle wheel, an electric generator which generates electric power to be supplied to a sensor provided on the vehicle wheel, a battery which stores the electric power generated by the electric generator, and a wireless communication device which wirelessly communicates an output signal of the sensor with an electronic equipment arranged on a vehicle body side. The stator is supported and fixed to the stationary side bearing ring member, and the rotor, the battery and the wireless communication device are supported and fixed to the rotation side bearing ring member.