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    Electric vehicle drive device
    1.
    发明授权
    Electric vehicle drive device 有权

    公开(公告)号：US11305653B2

    公开(公告)日：2022-04-19

    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 ,  B60K1/02 ,  B60K7/00 ,  B60K17/02 ,  B60K17/04 ,  B60K17/08 ,  F16H3/72 ,  F16H3/66 ,  B60L9/18

    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.

    REACTION FORCE APPLYING DEVICE FOR A STEERING WHEEL
    3.
    发明申请
    REACTION FORCE APPLYING DEVICE FOR A STEERING WHEEL 有权

    公开(公告)号：US20210269083A1

    公开(公告)日：2021-09-02

    申请号：US17253889

    申请日：2019-07-01

    Applicant: NSK LTD.

    Inventor： Masafumi Hikida ,  Yasuyuki Matsuda ,  Ryuho Morita

    IPC: B62D5/00 ,  F16H1/22

    Abstract: Provided is a reaction force applying device for a steering wheel that can be configured in a small size. The two-stage gears 3a, 3b have an intermediate shaft 9 arranged so as to be parallel to the steering shaft 1, a first teeth section 10 provided on the intermediate shaft 9 and engaging with the shaft side teeth section 4 of the steering shaft 1, and a second teeth section 11 arranged on a portion on the electric motor 2 side of the intermediate shaft 9 with respect to the first teeth section 10 and engaging with the motor side teeth section 8 of the electric motor 2.

    Vehicle weight measurement device
    4.
    发明授权
    Vehicle weight measurement device 有权

    公开(公告)号：US11002311B2

    公开(公告)日：2021-05-11

    申请号：US16623193

    申请日：2017-12-15

    Applicant: NSK LTD.

    Inventor： Ryuho Morita ,  Yasuyuki Matsuda ,  Masafumi Hikida ,  Eisaku Suzuki ,  Shunsuke Suzuki ,  Yoshiya Mukai

    IPC: B60G15/06 ,  F16C19/46 ,  G01G19/10 ,  F16F9/32

    Abstract: A vehicle weight measurement device includes a diaphragm which covers an opening area of a groove portion of a mounting part to form an oil chamber of a predetermined space together with the groove portion; a pressure sensor which detects a change in pressure of measurement fluid in the oil chamber; a first piston which presses the diaphragm; a second piston which presses the first piston; and a bearing unit interposed between the second piston and a spring bush which receives one end of a spring of a suspension device and is relatively rotatable. The bearing unit includes a thrust needle bearing which swingably supports a load in a longitudinal direction of the suspension device, and a slide bush which does not receive a load in the longitudinal direction and receives a load in a radial direction while causing constant damping to swinging.

    Friction roller-type transmission
    5.
    发明授权
    Friction roller-type transmission 有权

    公开(公告)号：US10309501B2

    公开(公告)日：2019-06-04

    申请号：US15313167

    申请日：2015-03-25

    Applicant: NSK LTD.

    Inventor： Hiroyasu Yoshioka ,  Yasuyuki Matsuda ,  Kazutaka Tanaka ,  Takashi Imanishi

    IPC: F16H13/10 ,  F16H13/08 ,  F16H13/04

    Abstract: A sun roller of a friction roller-type transmission includes a movable sun roller element (23) capable of moving in an axial direction. Furthermore, the sun roller is provided with a loading cam mechanism which is formed along the circumferential direction of an input shaft (12), the loading cam mechanism having a first cam surface (75), a second cam surface (77) arranged facing the first cam surface (75) and secured to the input shaft (12), rolling elements (63) held between the first and second cam surfaces (75, 77), and an annular holding device (51), and the loading cam mechanism axially displacing the movable sun roller element (23). The holding device (51) has an inside-diameter-surface guiding part (81) for positioning the holding device relative to the input shaft by being fitted over the input shaft, the guiding part being provided to the inside diameter surface.

    Friction roller type reduction gear
    6.
    发明授权
    Friction roller type reduction gear 有权

    公开(公告)号：US09845848B2

    公开(公告)日：2017-12-19

    申请号：US15032493

    申请日：2014-09-26

    Applicant: NSK LTD.

    Inventor： Kazutaka Tanaka ,  Yasuyuki Matsuda

    IPC: F16H13/08 ,  F16H13/14 ,  F16H25/18

    CPC classification number: F16H13/08 ,  F16H13/14 ,  F16H25/186

    Abstract: A friction roller type reduction gear includes a first sun roller so mounted on an input shaft movably in the axial direction of the input shaft, a plurality of first cam grooves formed in the end face of the first sun roller, a cam plate so mounted on the input shaft as is opposed to the first cam groove side of the first sun roller, a plurality of second cam grooves so formed in the cam plate as are opposed to the first cam grooves, rolling elements interposed between the first and second cam grooves, and a cage for holding the rolling elements rollably, while a pitch circle diameter of the position for holding the rolling elements is different from pitch circle diameter of the first and second cam grooves.

    STEERING SYSTEM
    8.
    发明申请
    STEERING SYSTEM 有权

    公开(公告)号：US20210261186A1

    公开(公告)日：2021-08-26

    申请号：US17254036

    申请日：2019-07-01

    Applicant: NSK LTD.

    Inventor： Masafumi Hikida ,  Yasuyuki Matsuda ,  Ryuho Morita

    IPC: B62D5/00 ,  B62D5/04 ,  B62D15/02

    Abstract: Provided is a structure that together with being compact, allows a vehicle to be steered even when power is not supplied to a steering device and a turning device.
    A reduction mechanism 28 for reducing and transmitting the motive power of the reaction force applying motor 6 to a steering shaft 5 is configured by a shaft-side teeth portion 9 of the steering shaft 5, two-stage gears 7a, 7b having a first teeth portion 26 and a second teeth portion 27, and a motor-side teeth portion 19 of the reaction force applying motor 6. A torque transmission mechanism 4 connects the steering shaft 5 and an input shaft 51 of a steering gear unit 49, and is capable of switching between a transmitting mode of mechanically transmitting torque between the steering shaft 5 and the input shaft 51 and a non-transmitting mode.

    Electric vehicle driving device
    9.
    发明授权
    Electric vehicle driving device 有权

    公开(公告)号：US10940751B2

    公开(公告)日：2021-03-09

    申请号：US16480933

    申请日：2018-06-05

    Applicant: Nsk Ltd.

    Inventor： Yasuyuki Matsuda ,  Daisuke Gunji ,  Shin Yamamoto ,  Toshirou Toyoda

    IPC: B60K17/02 ,  B60K7/00 ,  B60K17/04 ,  B60K17/08 ,  F16H3/72 ,  H02K7/00 ,  H02K7/108 ,  H02K7/116 ,  F16D41/00

    Abstract: An electric vehicle driving device includes a first motor, a second motor, a transmission device to which power of at least one of the first motor and the second motor is transmitted, and an output member that rotates with power output from the transmission device. A rotation axis of the first motor, a rotation axis of the second motor, and a rotation axis of the transmission device are arranged in parallel to a rotation axis of the output member. When seen from an axial direction parallel to the rotation axis of the output member, the rotation axis of the first motor is located on one side of a straight line passing through the rotation axis of the output member and the rotation axis of the transmission device and the rotation axis of the second motor is located on the other side of the straight line.

    Extension-retraction link and suspension
    10.
    发明授权
    Extension-retraction link and suspension 有权

    公开(公告)号：US10940730B2

    公开(公告)日：2021-03-09

    申请号：US16493579

    申请日：2018-10-12

    Applicant: NSK LTD.

    Inventor： Hirotaka Kishida ,  Yasuyuki Matsuda

    IPC: B60G7/00 ,  B60G17/015 ,  B60G7/02

    Abstract: An extension-retraction link includes: a stationary shaft having a tubular shape; a first universal joint that connects the stationary shaft to a vehicle body side member; a movable shaft that can slide with respect to the stationary shaft; a second universal joint that connects the movable shaft to a hub carrier; and an actuator that moves the movable shaft. The movable shaft includes: a first plane surface; a second plane surface making an angle with respect to the first plane surface; a third plane surface opposite the first plane surface; and a fourth plane surface opposite the second plane surface. The stationary shaft includes: first to fourth bushes in contact with the first to fourth plane surfaces, 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.

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