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公开(公告)号：US20190285461A1
公开(公告)日：2019-09-19
申请号：US16318797
申请日：2017-07-18
Applicant: NSK LTD.
Inventor： Masafumi HIKIDA , Eisaku SUZUKI , Shunsuke SUZUKI , Yasuyuki MATSUDA
Abstract: A weight measuring device includes: a bottom plate (200) in contact with an arm of a suspension; a piston (300) capable of pressing a diaphragm (230) forming an oil chamber (201) on an upper surface side of the bottom plate; a pressure sensor (400) for detecting a pressure of measurement fluid (R) in the oil chamber on a lower surface side of the bottom plate; an oil discharge hole portion (240) which communicates an inner side of the oil chamber with the atmosphere side and is capable of discharging excess hydraulic oil in the oil chamber; and a sealing portion (242) which is provided in the oil discharge hole portion and seals the oil discharge hole portion after discharging the excess measurement fluid (R) and equilibrating an internal pressure to the atmospheric pressure in a state of no load.
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公开(公告)号：US20170335891A1
公开(公告)日：2017-11-23
申请号：US15534604
申请日：2015-12-11
Applicant: NSK LTD.
Inventor： Masafumi HIKIDA , Yasuyuki MATSUDA , Ryuho MORITA , Hiroki MAEJIMA
IPC: F16C35/077 , F16C19/28 , F02B33/40 , F02B39/04
CPC classification number: F16C35/077 , F02B33/40 , F02B39/04 , F16C19/183 , F16C19/28 , F16C19/547 , F16C25/083 , F16C27/066 , F16C33/6666 , F16C35/063 , F16C35/067 , F16C2360/22 , F16C2360/43 , F16C2360/44 , F16C2361/61 , F16H13/06 , F16H57/043 , F16H57/0479 , F16H57/0487
Abstract: A friction roller type speed increaser (100) includes a high speed side shaft (11), a ring roller (21), a low speed side shaft (13), at least one fixed roller (15), at least one movable roller, and a housing (23) that surrounds the rollers. A bearing unit (45) that includes a cylindrical bearing housing (51) into which the high speed side shaft (11) is inserted, bearings (53 and 55) on an inner circumferential portion of the bearing housing (51) which rotatably support the high speed side shaft (11), an oil seal (59) which is provided at one end portion of the bearing housing (51) and closes an inner space including the bearings is floating-supported such that the bearing unit can move in a radial direction of the high speed side shaft (11) in a unit accommodating section (47) formed in the housing (23).
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公开(公告)号：US20160252168A1
公开(公告)日：2016-09-01
申请号：US15032493
申请日：2014-09-26
Applicant: NSK LTD.
Inventor： Kazutaka TANAKA , Yasuyuki MATSUDA
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.
Abstract translation: 一种摩擦辊式减速机包括：第一太阳辊，其安装在输入轴上，该第一太阳辊沿输入轴的轴向可移动;多个第一凸轮槽，形成在第一太阳辊的端面;凸轮板，其安装在 所述输入轴与所述第一太阳辊的所述第一凸轮槽侧相对，在所述凸轮板上形成有与所述第一凸轮槽相对的多个第二凸轮槽，所述第二凸轮槽设置在所述第一和第二凸轮槽之间， 以及用于保持滚动元件的保持架，而用于保持滚动元件的位置的节圆直径不同于第一和第二凸轮槽的节圆直径。
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公开(公告)号：US20200238776A1
公开(公告)日：2020-07-30
申请号：US16493579
申请日：2018-10-12
Applicant: NSK LTD.
Inventor： Hirotaka KISHIDA , Yasuyuki MATSUDA
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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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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Patent Agency Ranking
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
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.
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公开(公告)号：US20170191552A1
公开(公告)日：2017-07-06
申请号：US15313167
申请日：2015-03-25
Applicant: NSK LTD.
Inventor： Hiroyasu YOSHIOKA , Yasuyuki MATSUDA , Kazutaka TANAKA , Takashi IMANISHI
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.
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公开(公告)号：US20200378438A1
公开(公告)日：2020-12-03
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
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.
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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
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.
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公开(公告)号：US20170227111A1
公开(公告)日：2017-08-10
申请号：US15436996
申请日：2017-02-20
Applicant: NSK LTD.
Inventor： Yasuyuki MATSUDA , Daisuke Gunji , Masafumi Hikida , Kazutaka Tanaka , Tooru Ueda , Tetsu Takehara , Tomoharu Saito , Hiroyasu Yoshioka , Yuka Kaneko
CPC classification number: F16H57/0037 , F16C19/364 , F16C19/463 , F16C33/581 , F16C33/6677 , F16C2361/65 , F16F15/1216 , F16H2059/147 , G01L3/101 , G01L3/104 , G01L3/105 , G01L3/109
Abstract: A rotation transmission device having a high torque measurement resolution is provided. The rotation transmission device is provided with: a rotary-shaft unit (6) having a first and second rotary shaft (13, 14) combined so as to be coaxial and such that the end sections thereof can rotate relative to each other and a torsion bar (15) that is provided on the inner-diameter side of the first and second rotary shafts so as to be coaxial therewith, has one end section connected to the first rotary shaft (13), and has the other end section connected to the second rotary shaft (14); a first gear (7) fastened to the outer peripheral surface of the first rotary shaft (13); a second gear (8) fastened to the outer peripheral surface of the second rotary shaft (14); a coupling shaft (9) provided on the inner-diameter side of the torsion bar (15) so as to be coaxial therewith, having one end section connected to one rotary shaft (13), and having the other end section protruding from an end of the torsion bar (15) in the axial direction; a first encoder disposed and fixed on the other end of the coupling shaft (9) so as to be coaxial with the first rotary shaft (13) and having a first detected section (39); a second encoder fastened on the other end of the second rotary shaft (14) so as to be close to the first encoder and having a second detected section (40); and a sensor unit having at least one sensor (42a, 42b) that faces the first and second detected sections (39, 40).
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