公开(公告)号：US20200011404A1

公开(公告)日：2020-01-09

申请号：US16495599

申请日：2018-03-20

Applicant: NSK LTD. ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Hirofumi ITAGAKI ,  Masahiro KITA ,  Kippei MATSUDA ,  Kenichiro TANAKA ,  Hideyuki IMAI ,  Kenji KOMATSU

IPC: F16H15/38

Abstract: Provided is a pressing device for toroidal continuously variable transmission capable of reducing hysteresis that occurs between torque and pressing force. An intermediate sliding member 27 is provided in at least one location of a portion between an end surface on the outside in the radial direction of the retainer 13 of the roller 14 arranged on the outermost side in the radial direction and an inside surface of the pocket 25 on the outside in the radial direction, and a portion between an end surface on the outside in the radial direction of the retainer 13 of one roller 14 of adjoining rollers 14 in the radial direction and an end surface on the inside in the radial direction of the retainer 13 of another roller 14. As a result, the contact area of a sliding contact portion 32 is made smaller than in a case where an intermediate sliding member 27 is not provided.

公开(公告)号：US20160178036A1

公开(公告)日：2016-06-23

申请号：US14909283

申请日：2014-07-17

Applicant: NSK LTD.

Inventor： Masahiro KITA ,  Yasunori OISHI ,  Hiroki NISHII

IPC: F16H15/38 ,  F16H63/06

CPC classification number: F16H15/38 ,  F16H63/065

Abstract: A hydraulic pressing unit for pressing an input disc in an axial direction includes a first hydraulic pressure chamber and a second hydraulic pressure chamber, a primary piston facing the first hydraulic pressure chamber and a secondary piston facing the second hydraulic pressure chamber, and oil holes configured to supply oil into the first hydraulic pressure chamber are formed in an input shaft, while oil paths configured to supply oil into the second hydraulic pressure chamber are formed in the secondary piston. Consequently, a separate oil hole configured to supply oil into the second hydraulic pressure chamber is not formed in the input shaft. Thus, it is possible to mitigate the cost and labor hours involved in fabrication of the input shaft. Two oil holes spaced apart from each other in an axial direction do not exist in the input shaft.

Abstract translation: 用于沿轴向按压输入盘的液压按压单元包括第一液压室和第二液压室，面向第一液压室的主活塞和面向第二液压室的副活塞， 在输入轴上形成向第一液压室供给油的构造，在第二活塞中形成有用于将油供给到第二液压室的油路。 因此，在输入轴上不形成用于向第二液压室供给油的单独的油孔。 因此，可以减轻输入轴的制造所涉及的成本和劳动时间。 输入轴上不存在沿轴向间隔开的两个油孔。

公开(公告)号：US20200063837A1

公开(公告)日：2020-02-27

申请号：US16495451

申请日：2018-03-20

Applicant: NSK LTD. ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Hirofumi ITAGAKI ,  Masahiro KITA ,  Kippei MATSUDA ,  Kenichiro TANAKA ,  Hideyuki IMAI ,  Kenji KOMATSU

IPC: F16H15/38 ,  F16H57/04

Abstract: Provided is a pressing device for a toroidal continuously variable transmission that is capable of sufficiently supplying lubrication oil to all rollers inside a pocket, and is capable of suppressing the occurrence of fretting wear on the rolling surfaces of the rollers, a first cam surface and a second cam surface. An oil passage 28 is provided for supplying lubrication oil to the inside of each pocket 25 in the inside portion in the radial direction of a retainer 14 that holds a plurality of more than one roller 13 arranged in a row in the radial direction. The center axis O29 of a discharge port 29 that is provided on an end portion on the downstream side of the oil passage 28 and that opens to the inside surface in the radial direction of the pocket 25 is inclined toward the front side in the rotational direction of the retainer 14 with respect to the center axis of the pocket 25.

公开(公告)号：US20230193984A1

公开(公告)日：2023-06-22

申请号：US17926873

申请日：2021-12-03

Applicant: NSK LTD.

Inventor： Hiroshi KAWAHARA ,  Hiroki HASHIGUCHI ,  Hirofumi ITAGAKI ,  Azusa HIDAKA ,  Hiroki NISHIDA ,  Naofumi FUJITA ,  Hikari YOSHIMI ,  Naohiro HITOMI ,  Masahiro KITA

IPC: F16H13/08 ,  F16H13/14 ,  F16H57/04

CPC classification number: F16H13/08 ,  F16H13/14 ,  F16H57/043 ,  F16H57/0486

Abstract: A frictional roller reducer having a sun roller; a ring roller; a plurality of intermediate rollers having rolling surfaces coming in rolling contact with the sun roller and the ring roller; the sun roller or the ring roller having a pair of roller elements including inclined surface portions on a circumferential surface coming in rolling with rolling surfaces, the inclined surface portions inclined in directions going toward the intermediate rollers in a radial direction as going away from each other in the axial direction; a pressing device pressing the pair of roller elements in directions going closer to each other, and an elastic member arranged between the pair of roller elements, the elastic member urging the pair of roller elements in directions going away from the rolling surface of the intermediate rollers.

公开(公告)号：US20200271200A1

公开(公告)日：2020-08-27

申请号：US16763674

申请日：2018-11-07

Applicant: NSK LTD. ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Masahiro KITA ,  Kippei MATSUDA ,  Hideyuki IMAI ,  Kenichiro TANAKA

IPC: F16H15/38 ,  F16H57/04

Abstract: A pressing device for a toroidal continuously variable transmission, comprises: a disk having a toroidal curved surface and a first cam surface; a cam plate having a cylindrical portion, and an outward facing flange portion having a second cam surface; and a plurality of rolling bodies. The cylindrical portion has a cylinder portion, a projection projecting inward in the radial direction in one axial end portion of the cylinder portion and having a step surface, and an oil supply passage. At least a part of a radial inside opening of the oil supply passage opens to a portion of the cylinder portion positioned further on the other side in the axial direction than the step surface. The oil supply passage has an oil-passage hole penetrating the cylinder portion and an oil-passage groove continuous with the oil-passage hole and recessed from the step surface.

公开(公告)号：US20190277375A1

公开(公告)日：2019-09-12

申请号：US16345055

申请日：2017-10-24

Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA ,  NSK LTD.

Inventor： Kippei MATSUDA ,  Hideyuki IMAI ,  Kenichiro TANAKA ,  Kenji KOMATSU ,  Eiji INOUE ,  Tomohiro INOUE ,  Daiki SHIROTA ,  Masahiro KITA

IPC: F16H15/38

Abstract: A toroidal continuously variable transmission includes a preload spring disposed between a rotary assembly including a first disc and a pressing device, and a driving force transmission shaft, and a thrust bearing disposed between a first member and the preload spring, the first member being one of the rotary assembly and the driving force transmission shaft. In a direction of an axis line, a gap is formed between a second member and the thrust bearing, the second member being the other of the rotary assembly and the driving force transmission shaft. A dimension of the gap in the direction of the axis line is less than a deformation amount of the preload spring in the direction of the axis line, at an elastic limit.