公开(公告)号：US09625332B2

公开(公告)日：2017-04-18

申请号：US14916668

申请日：2014-09-03

Applicant: NSK Ltd.

Inventor： Tomoharu Saito ,  Yasuyuki Matsuda ,  Daisuke Gunji ,  Masafumi Hikida ,  Kazutaka Tanaka ,  Tohru Ueda ,  Yuka Kaneko ,  Tetsu Takehara ,  Hiroyasu Yoshioka

IPC: G01L3/10 ,  G01L25/00

CPC classification number: G01L3/104 ,  G01L3/101 ,  G01L3/109 ,  G01L25/003

Abstract: In order to implement a structure capable of improving the resolution of torque measurement while preventing the plastic deformation of a torsion bar (15), an input-side stopper (61) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an input-side rotating body (55) that includes an input shaft (13) and an input gear (7), and an output-side stopper (63) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an output-side rotating body (56) that includes an output shaft (14) and an output gear (8). The input-side stopper (61) and the output-side stopper (63) are combined so as to be engaged to be able to transmit torque only when the torsional angle within the elastic range of the torsion bar (15) reaches a predetermined amount.

公开(公告)号：US20240308326A1

公开(公告)日：2024-09-19

申请号：US18599628

申请日：2024-03-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NSK LTD.

Inventor： Kazunori Sakai ,  Shinichiro Suenaga ,  Masayuki Ishibashi ,  Hiroyasu Yoshioka ,  Takahisa Nomoto

IPC: B60K6/40 ,  B60K6/48

CPC classification number: B60K6/40 ,  B60K6/48 ,  B60K2006/4816

Abstract: A ball bearing on one rotary shaft, out of a first rotary shaft and a second rotary shaft, on which a rotation member corresponding to a larger value of a ratio out of values of ratios of a rotation speed of a first rotation member and a rotation speed of a second rotation member relative to a rotation speed of a third rotation member is arranged does not include an inner race. Thereby, a ball PCD can be reduced while securing durability of a ball bearing on the one rotary shaft, and dragging loss between balls of the ball bearing and the inner race can be reduced. Since the ball bearing integrally configured with the rotary shaft is arranged on the one rotary shaft, reducing dragging loss of the ball bearing relatively largely reduces motive power loss on the third rotary shaft due to dragging loss of the ball bearing.

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.

公开(公告)号：US10167932B2

公开(公告)日：2019-01-01

申请号：US15514285

申请日：2014-09-26

Applicant: NSK LTD.

Inventor： Hiroyasu Yoshioka ,  Eiji Inoue ,  Takashi Imanishi ,  Hirotaka Kishida

IPC: F16H15/50 ,  F16H13/08 ,  F16H55/56 ,  F16H25/18 ,  F16H57/08 ,  F16H63/06 ,  F16H63/30

Abstract: Projections protruding towards a cam plate and a disc are provided on both axial side surfaces of the retainer at a plurality of positions at which phases of the projections in the circumferential direction are offset from pockets. One axial direction surface of the cam plate and the disc are formed with concave portions at portions facing the respective projections. The concave portions have an axial depth deepest at a center portion thereof in the circumferential direction and becoming shallower towards both end portions thereof.

公开(公告)号：US10359102B2

公开(公告)日：2019-07-23

申请号：US15562315

申请日：2016-02-24

Applicant: NSK LTD.

Inventor： Hiroshi Kawahara ,  Hiroyasu Yoshioka ,  Tetsu Takehara ,  Yuji Shimomura

IPC: F16H13/04 ,  F16H13/08 ,  F16H13/14

Abstract: A friction roller-type reduction gear includes a sun roller concentric with an input shaft, a ring roller having a stationary ring roller element and a moveable ring roller element, intermediate rollers in rolling contact with an outer peripheral surface of the sun roller and an inner peripheral surface of the ring roller, a coupling part coupling the ring roller and the output shaft, and a loading cam mechanism having a cam ring for changing contact surface pressure of each rolling contact surface. The outer surface of the sun roller is a concave curved surface of which a shape of an outer edge in an axial cross-section is a single circular arc-shaped concave curve, and an outer surface of the intermediate roller is a convex curved surface of which a shape of an outer edge in an axial cross-section is a single circular arc-shaped convex curve.

公开(公告)号：US10161489B2

公开(公告)日：2018-12-25

申请号：US15527894

申请日：2016-04-12

Applicant: NSK LTD.

Inventor： Ryosuke Fujita ,  Hiroshi Kawahara ,  Hiroyasu Yoshioka

IPC: F16H13/08 ,  F16H13/14 ,  F16H13/06

Abstract: A pivot holder of a friction-roller-type reduction gear has a pair of bearing parts configured to support a rotational shaft of an intermediate roller and having a pivot axis at an eccentric position from a center of the rotational shaft, and a bridging part configured to integrally couple the pair of bearing parts. A carrier has a holder support part configured to rotatably support the bearing parts. An interaxial distance between a center of the pivot axis and the center of the rotational shaft is equal to or smaller than a maximum radius of an outer diameter of the intermediate roller, and the center of the pivot axis is located on an applying line of a torque reaction force of transmission torque to be applied to the pivot holder.

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

IPC: F16H57/00 ,  F16C19/36 ,  G01L3/10 ,  F16C33/58 ,  F16C33/66 ,  F16F15/121 ,  F16C19/46

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).

公开(公告)号：US10480635B2

公开(公告)日：2019-11-19

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

IPC: G01L3/00 ,  F16H57/00 ,  G01L3/10 ,  F16C33/66 ,  F16C19/36 ,  F16C19/46 ,  F16C33/58 ,  F16F15/121 ,  F16H59/14

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).

公开(公告)号：US20160195183A1

公开(公告)日：2016-07-07

申请号：US14901063

申请日：2013-11-08

Applicant: NSK LTD.

Inventor： Yasuyuki MATSUDA ,  Daisuke Gunji ,  Masafumi Hikida ,  Kazutaka Tanaka ,  Tooru Ueda ,  Tetsu Takehara ,  Tomoharu Saito ,  Hiroyasu Yoshioka ,  Yuka Kaneko

IPC: F16H57/00 ,  G01L3/10

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).

Abstract translation: 提供具有高扭矩测量分辨率的旋转传递装置。 旋转传递装置设置有：具有第一和第二旋转轴（13,14）的旋转轴单元（6），该第一和第二旋转轴（13,14）组合成同轴的，并且使得其端部部分能够相对于彼此旋转， 设置在第一和第二旋转轴的内径侧以与其同轴的杆（15）具有连接到第一旋转轴（13）的一个端部，并且另一个端部连接到 第二旋转轴（14）; 固定到第一旋转轴（13）的外周面的第一齿轮（7）; 固定到第二旋转轴（14）的外周表面的第二齿轮（8）; 设置在扭杆（15）的内径侧以与其同轴的联接轴（9），其一端部连接到一个旋转轴（13），并且另一端部从端部 的扭杆（15）在轴向上; 第一编码器，设置并固定在所述联结轴（9）的另一端，以与所述第一旋转轴（13）同轴并具有第一检测部分（39）; 固定在所述第二旋转轴（14）的另一端以便靠近所述第一编码器并具有第二检测部分（40）的第二编码器; 以及传感器单元，其具有面向所述第一和第二检测部分（39,40）的至少一个传感器（42a，42b）。