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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.
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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.
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公开(公告)号：US20190316990A1
公开(公告)日：2019-10-17
申请号：US16317138
申请日：2017-06-13
Applicant: NSK LTD.
Inventor： Hiroshi KAWAHARA , Daisuke GUNJI , Fumiaki SODA , Koji HASHIMOTO
IPC: G01M17/013 , G01L5/16 , G01L5/13 , B60B1/14
Abstract: A wheel equipped with a sensing device includes a wheel and a sensing device. The sensing device includes a displacement extraction member, a to-be-detected part, and a detecting part. One radial end portion of the displacement extraction member is supported to one radial end-side portion of the wheel. The other radial end portion of the displacement extraction member is a free end. The to-be-detected part is provided to one of the other radial end-side portion of the wheel and the other radial end portion of the displacement extraction member. The detecting part is provided to the other of the other radial end-side portion of the wheel and the other radial end portion of the displacement extraction member, and is arranged in a vicinity of the to-be-detected part. An output of the detecting part changes in association with a change in positional relationship between the detecting part and the to-be-detected part.
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Patent Agency Ranking
公开(公告)号：US20180361789A1
公开(公告)日：2018-12-20
申请号：US15780885
申请日：2016-10-31
Applicant: NSK LTD.
Inventor： Daisuke GUNJI , Yasuyuki MATSUDA
Abstract: An internal gear configuring a reduction gear is supported and fixed to a rotation side flange provided on an axially outer end portion of a hub, and the hub is rotationally driven based on a driving force input through the internal gear. Accordingly, since a drive shaft for rotationally driving the hub is not necessarily connected to a center hole of the hub, an electric generator and a wireless communication device can be disposed in an accommodating space having a large space provided on an axially inner side of the hub.
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公开(公告)号：US20230086747A1
公开(公告)日：2023-03-23
申请号：US17754668
申请日：2020-09-10
Applicant: THE UNIVERSITY OF TOKYO , BRIDGESTONE CORPORATION , NSK Ltd.
Inventor： Hiroshi FUJIMOTO , Osamu SHIMIZU , Keizo AKUTAGAWA , Yasumichi WAKAO , Isao KUWAYAMA , Daisuke GUNJI
Abstract: A wireless power reception system 1 includes: a power reception device 5 including a power reception coil 51 that receives power supplied wirelessly from a power transmission coil 41 of a power transmission device 4 installed in a road surface, at least a portion of the power reception coil 51 being housed in a wheel 3 of a moving body 2; and an onboard device 6 which is installed in the moving body 2 and which is electrically connected to the power reception device 5, wherein the power reception device 5 can transmit received power to the onboard device 6, and the power reception coil 51 includes a stacked plurality of spiral coil layers 52a and 52b.
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公开(公告)号：US20220416580A1
公开(公告)日：2022-12-29
申请号：US17754671
申请日：2020-09-10
Applicant: THE UNIVERSITY OF TOKYO , BRIDGESTONE CORPORATION , NSK Ltd.
Inventor： Hiroshi FUJIMOTO , Osamu SHIMIZU , Keizo AKUTAGAWA , Yasumichi WAKAO , Isao KUWAYAMA , Daisuke GUNJI
Abstract: A wireless power reception system 1 includes: a power reception device 5 including a power reception coil 51 that receives power supplied wirelessly from a power transmission coil 41 of a power transmission device 4 installed in a road surface, at least a portion of the power reception coil 51 being housed in a wheel 3 of a moving body 2; and a driving device 61 which is installed in the wheel 3 and which drives the wheel 3 with power received by the power reception device 5, wherein the power reception device 5 is provided with a converter 56a and an inverter 56b, at least a portion of the converter 56a and at least a portion of the inverter 56b are housed in the wheel 3, the converter 56a is positioned vertically above the power reception coil 51, and the inverter 56b is positioned vertically above the converter 56a.
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公开(公告)号：US20200072290A1
公开(公告)日：2020-03-05
申请号：US16466581
申请日：2018-06-20
Applicant: NSK LTD.
Inventor： Daisuke GUNJI , Fumiaki SODA
Abstract: The present invention provides a rolling bearing unit for supporting wheel that is able to suppress increase in the dimension in the axial direction due to the installation of a generator and a wireless communication apparatus to a minimum, supply sufficient electric power to a sensor attached to a wheel, and wirelessly transmit output signals of the sensor to an electronic apparatus on the vehicle body. The hub 17 comprises an inner recessed portion 29 on the inner diameter side of the inside portion in the axial direction which has a cylindrical fitting surface section 30 on the inner peripheral surface and is coaxial with the center axis of the hub 17, and a supporting member 67 is supported by and fastened to the inside of the inner recessed portion in a state where the hollow cylindrical supporting member 67 fits the cylindrical guide surface section 70 that is provided in the outer peripheral surface to the fitting surface section 30. A rotor 6 which is an armature is fixed to the inside portion in the axial direction of the supporting member 67 to be coaxial with the supporting member 67, and the wireless communication apparatus 12 is placed inside in the radial direction of the supporting member 67. A through-hole 34 where a wiring 57 is placed opens in the bottom surface 31 of the inner recessed portion 29.
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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
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).
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