公开(公告)号：US20240400128A1

公开(公告)日：2024-12-05

申请号：US18707759

申请日：2021-11-26

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI ,  Koji OKUMURA

IPC: B62D5/04

Abstract: A gear includes a resin sleeve having a disc shape, and a resin toothing that covers an outer peripheral portion of the sleeve and includes a plurality of gear teeth arranged at equal intervals in a circumferential direction. The sleeve includes a plurality of protrusions arranged on an outer peripheral surface at equal intervals in the circumferential direction, and a plurality of ribs arranged at equal intervals in the circumferential direction at positions on a radially inner side of the protrusions. A first installation location count L of the protrusions in the circumferential direction and a second installation location count M of the ribs in the circumferential direction are equal to each other and are integral multiples of a third installation location count N of the gear teeth in the circumferential direction.

公开(公告)号：US20210283810A1

公开(公告)日：2021-09-16

申请号：US17189415

申请日：2021-03-02

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI ,  Mayu TORII

IPC: B29C45/37 ,  B29C45/26

Abstract: A resin molding mold, by which a resin worm wheel for a worm speed reducer is molded, includes a plurality of tooth forming portions provided such that the tooth forming portions are disposed at predetermined intervals on a circumference of the resin molding mold. The tooth forming portions each include a projection portion provided in a part of a tooth-flank forming surface by which a tooth flank is formed.

公开(公告)号：US20160194024A1

公开(公告)日：2016-07-07

申请号：US14975054

申请日：2015-12-18

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI ,  Wataru YAMADA

IPC: B62D5/00 ,  B62D7/16 ,  B62D6/00 ,  B62D3/12 ,  B62D3/04

CPC classification number: B62D5/0409 ,  F16H1/16 ,  F16H55/22 ,  F16H55/24

Abstract: A power transmission coupling that couples an output shaft of an electric motor and a worm shaft together includes a first rotation element coupled to the output shaft, a second rotation element coupled to the worm shaft, and an intermediate element formed of an elastic body and interposed between the first rotation element and the second rotation element. The intermediate element forms a unit integrally including an annular support portion, power transmission portions extending radially from the support portion and interposed between engaging protrusions of the first rotation element and the second rotation element, a spacer arranged inward of the support portion in a radial direction to apply a preload to the worm shaft in an axial direction, and a coupling portion that couples the support portion and the spacer together.

Abstract translation: 将电动机的输出轴和蜗杆轴联结在一起的动力传递联轴器包括联接到输出轴的第一旋转元件，联接到蜗杆轴的第二旋转元件和由弹性体形成的中间元件， 在第一旋转元件和第二旋转元件之间。 所述中间元件形成整体地包括环形支撑部的单元，从所述支撑部径向延伸并插入在所述第一旋转元件和所述第二旋转元件的接合突起之间的动力传递部，配置在所述支撑部的径向内侧的间隔件 以沿轴向将预载荷施加到所述蜗杆轴;以及联接部分，其将所述支撑部分和所述间隔件联接在一起。

公开(公告)号：US20170036691A1

公开(公告)日：2017-02-09

申请号：US15216030

申请日：2016-07-21

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI ,  Naofumi KAWAMURA ,  Naoji KAWASOKO

IPC: B62D5/04 ,  B62D3/04 ,  F16D11/10

CPC classification number: B62D5/043 ,  B62D3/04 ,  B62D5/0454 ,  F16D3/68 ,  F16D11/10

Abstract: A shaft coupling structure includes a rotating shaft, a worm shaft, a first member, a second member, and an intermediate member that is an elastic member. The intermediate member is interposed between the first member and the second member. Coupling protrusions of the first member that extend in an axial direction are each inserted between second radial protrusions of the intermediate member and between a plurality of first radial protrusions of the second member. Protruding portions of the first radial protrusions engage with the corresponding recessed portions of the second radial protrusions in the axial direction. When a relative rotation angle between the first member and the second member is smaller than a predetermined angle, ends of each of the second radial protrusions in a circumferential direction each projects in the circumferential direction with respect to a corresponding end of the corresponding first radial protrusion in the circumferential direction.

Abstract translation: 轴联结构包括旋转轴，蜗杆轴，第一构件，第二构件和作为弹性构件的中间构件。 中间构件插入在第一构件和第二构件之间。 沿轴向方向延伸的第一构件的联接突起分别插入在中间构件的第二径向突起之间和第二构件的多个第一径向突起之间。 第一径向突起的突出部与轴向的第二径向突起的相应凹部接合。 当第一构件和第二构件之间的相对旋转角度小于预定角度时，每个第二径向突起在圆周方向上的端部各自相对于相应的第一径向突起的相应端部在圆周方向上突出 在圆周方向。

公开(公告)号：US20140027197A1

公开(公告)日：2014-01-30

申请号：US13946289

申请日：2013-07-19

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI ,  Yoshitomo NAGAI

IPC: B62D5/04

CPC classification number: B62D5/0454 ,  B62D5/0409 ,  F16H55/24 ,  F16H2057/0213

Abstract: An electric power steering system includes a joint that connects a rotary shaft of an electric motor with a worm shaft of a speed reducer. The joint includes a first rotational element that has a boss into which a first end portion of the worm shaft is press-fitted, and a flange extending radially from the boss. The first bearing is held by a housing and supports the first end portion so that the first end portion is rotatable and movable in an axial direction. A first elastic body, which urges the worm shaft in the axial direction toward the electric motor through the first rotational element, is provided between an inner ring of the first bearing and the flange.

Abstract translation: 电动助力转向系统包括将电动机的旋转轴与减速器的蜗杆轴连接的接头。 接头包括第一旋转元件，该第一旋转元件具有凸起部，蜗杆轴的第一端部被压入该凸台中，以及从凸台径向延伸的凸缘。 第一轴承由壳体保持并支撑第一端部，使得第一端部可旋转并且可沿轴向移动。 在第一轴承的内圈和凸缘之间设置有通过第一旋转元件朝向电动机轴向推动蜗杆轴的第一弹性体。

公开(公告)号：US20160339947A1

公开(公告)日：2016-11-24

申请号：US15149950

申请日：2016-05-09

Applicant: JTEKT CORPORATION

Inventor： Arata KIKUCHI

IPC: B62D5/04 ,  F16H55/08 ,  B62D3/10 ,  F16H1/16

CPC classification number: B62D5/0454 ,  B23F5/22 ,  B23F5/24 ,  B62D3/10 ,  B62D5/0409 ,  F16H1/16 ,  F16H55/08

Abstract: A worm reduction gear satisfies following relational Formula (1) and Formula (2): 3≧D2/D1≧1.7  (1) 0.1°≦α−β≦0.5°  (2) where D1 is an outside diameter of a worm, D2 is an outside diameter of a hob for cutting a worm wheel to form tooth spaces, and α is a pressure angle of the worm wheel and β is a pressure angle of the worm at an intermeshing pitch circle of the worm and the worm wheel.

Abstract translation: 其中D1是蜗杆的外径，D2是用于切割蜗轮以形成齿隙的滚刀的外径，α是蜗轮的压力角，β是啮合处的蜗杆的压力角 蜗轮和蜗轮的节圆。

公开(公告)号：US20160069423A1

公开(公告)日：2016-03-10

申请号：US14836034

申请日：2015-08-26

Applicant: JTEKT CORPORATION

Inventor： Jun HAMAKITA ,  Arata KIKUCHI

IPC: F16H1/16

CPC classification number: F16H1/16 ,  B62D5/0409 ,  F16H55/24

Abstract: A center axis of a worm shaft is offset in an offset direction with respect to a plane that is orthogonal to a center axis of a worm wheel and that passes through a central position of the worm wheel in a tooth width direction. A bias member biases a second end of the worm shaft in a preloading direction in which a center distance between the worm shaft and the worm wheel decreases. When the worm shaft is configured like a right-hand thread, in a left-handed coordinate system, a direction toward a first end of the worm shaft in an axial direction (a direction toward an electric motor) corresponds to a thumb direction. The preloading direction corresponds to an index finger direction. The offset direction corresponds to a middle finger direction.

Abstract translation: 蜗杆轴的中心轴相对于与蜗轮的中心轴正交的平面的偏移方向偏移，并且在齿宽方向上穿过蜗轮的中心位置。 偏置构件在蜗杆轴和蜗轮之间的中心距离减小的预加载方向上偏压蜗杆轴的第二端。 当蜗杆轴构造为右旋螺纹时，在左手坐标系中，沿轴向（朝向电动机的方向）朝向蜗杆轴的第一端的方向对应于拇指方向。 预加载方向对应于食指方向。 偏移方向对应于中指方向。

公开(公告)号：US20150027248A1

公开(公告)日：2015-01-29

申请号：US14332999

申请日：2014-07-16

Applicant: JTEKT CORPORATION

Inventor： Wataru YAMADA ,  Hirotsugu KUSANO ,  Arata KIKUCHI ,  Yoshitomo NAGAI

IPC: B62D5/04

CPC classification number: B62D5/0409 ,  B62D5/04 ,  Y10T74/18792

Abstract: In a speed reducer of an electric power steering system, a first bearing supports a first end portion of a worm so that the first end portion is movable in an axial direction. Elastic members elastically support the worm in the axial direction. A second bearing supports a second end portion of the worm. An urging member oscillates and urges the worm. The sum of first frictional resistance in the axial direction between an inner ring of the first bearing and the worm and second frictional resistance in the axial direction between the urging member and an outer circumference of an outer ring of the second bearing is less than engagement frictional resistance in the axial direction of the worm.

Abstract translation: 在电动助力转向系统的减速器中，第一轴承支撑蜗杆的第一端部，使得第一端部能够沿轴向移动。 弹性构件沿轴向方向弹性地支撑蜗杆。 第二轴承支撑蜗杆的第二端部。 推动构件振动并促使蠕虫。 在第一轴承的内圈和蜗杆之间的轴向上的第一摩擦阻力的总和和第二轴承的外圈之间的推压部件和外周之间的轴向上的第二摩擦阻力的总和小于接合摩擦 蠕虫轴向阻力。