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

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

CPC classification number: F16H13/10 ,  F16H13/04 ,  F16H13/08

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：US20180172118A1

公开(公告)日：2018-06-21

申请号：US15527894

申请日：2016-04-12

Applicant: NSK LTD.

Inventor： Ryosuke FUJITA ,  Hiroshi KAWAHARA ,  Hiroyasu YOSHIOKA

IPC: F16H13/14 ,  F16H13/08

CPC classification number: F16H13/14 ,  F16H13/06 ,  F16H13/08

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：US20180347675A1

公开(公告)日：2018-12-06

申请号：US15562315

申请日：2016-02-24

Applicant: NSK LTD.

Inventor： Hiroshi KAWAHARA ,  Hiroyasu YOSHIOKA ,  Tetsu TAKEHARA ,  Yuji SHIMOMURA

IPC: F16H13/08 ,  F16H13/14

CPC classification number: F16H13/08 ,  F16H13/04 ,  F16H13/14

Abstract: A friction roller-type reduction gear includes a sun roller arranged concentrically with an input shaft, a ring roller having a stationary ring roller element and a moveable ring roller element, a plurality of intermediate rollers configured to be in rolling contact with an outer peripheral surface of the sun roller and an inner peripheral surface of the ring roller, a coupling part configured to couple the ring roller and the output shaft, and a loading cam mechanism having a cam ring and configured to change a contact surface pressure of each rolling contact surface. The outer peripheral 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 peripheral 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：US20240328456A1

公开(公告)日：2024-10-03

申请号：US18292933

申请日：2022-07-26

Applicant: NSK Ltd.

Inventor： Takahisa NOMOTO ,  Hiroki NISHII ,  Yuki KOSHIBA ,  Hiroyasu YOSHIOKA ,  Hiroshi KATOU

IPC: F16C19/06 ,  F16C33/58

CPC classification number: F16C19/06 ,  F16C33/585 ,  F16C2361/61

Abstract: A transmission includes a first shaft unit connected to a drive shaft of a drive unit. The first shaft unit includes a first shaft having a first shaft raceway surface on an outer peripheral surface thereof, a first output gear provided on the first shaft, a first outer ring attached to a first support part, the first outer ring having a first outer ring raceway surface on an inner peripheral surface thereof, and a plurality of first rolling elements disposed between the first shaft raceway surface and the first outer ring raceway surface.

公开(公告)号：US20170299024A1

公开(公告)日：2017-10-19

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 ,  F16H63/30 ,  F16H57/08 ,  F16H55/56 ,  F16H63/06 ,  F16H25/18

CPC classification number: F16H15/50 ,  F16H13/08 ,  F16H25/186 ,  F16H55/56 ,  F16H57/08 ,  F16H63/065 ,  F16H63/3023 ,  F16H2057/087

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：US20160195442A1

公开(公告)日：2016-07-07

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

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.

Abstract translation: 为了实现能够在防止扭杆（15）的塑性变形的同时提高转矩测量的分辨率的结构，在周向上具有不均匀形状（齿轮形状）的输入侧止动器（61）设置在 包括输入轴（13）和输入齿轮（7）的输入侧旋转体（55）的一部分和沿圆周方向具有不平坦形状（齿轮形状）的输出侧止动件（63） 设置在包括输出轴（14）和输出齿轮（8）的输出侧旋转体（56）的一部分中。 输入侧止动器（61）和输出侧止动器（63）被组合以仅在扭杆（15）的弹性范围内的扭转角达到预定量时才能够传递扭矩 。