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：US20130133974A1

公开(公告)日：2013-05-30

申请号：US13680375

申请日：2012-11-19

Applicant: JTEKT CORPORATION

Inventor： Jun HAMAKITA ,  Michitoshi MITSUMARU ,  Yoshitomo NAGAI

IPC: B62D5/04

CPC classification number: B62D5/0403 ,  B62D5/0409 ,  F16C23/08 ,  F16C27/04 ,  F16C2326/24 ,  F16C2361/61 ,  F16H55/24 ,  F16H2057/0213

Abstract: There is provided an urging mechanism that elastically urges a second end portion of a worm shaft that is supported so as to be pivotable about a first end portion. The urging mechanism is configured to adjust a backlash between the worm shaft and a worm wheel by elastically urging the second end portion in a perpendicular direction that is perpendicular to a direction in which an inter-axis distance between the worm shaft and the worm wheel increases and decreases, in a state where increases and decreases in the inter-axis distance is prevented.

Abstract translation: 提供了一种推动机构，其弹性地推动蜗杆轴的第二端部，该第二端部被支撑为能够绕第一端部枢转。 推动机构构造成通过在与蜗杆轴和蜗轮之间的轴间距离增加的方向垂直的垂直方向上弹性推动第二端部来调节蜗杆轴与蜗轮之间的间隙 并且在防止轴间距离的增减的状态下减小。

公开(公告)号：US20130199325A1

公开(公告)日：2013-08-08

申请号：US13751250

申请日：2013-01-28

Applicant: JTEKT CORPORATION

Inventor： Jun HAMAKITA ,  Michitoshi MITSUMARU

IPC: F16H55/22

CPC classification number: F16H55/22 ,  F16H55/0853 ,  Y10T29/49469 ,  Y10T74/1987 ,  Y10T74/19953

Abstract: Each tooth of a worm wheel has a first tooth flank in which a helical surface portion is arranged on one side in a rotational axis direction of the worm wheel and a concavely curved surface portion is arranged on the other side in the rotational axis direction, and a second tooth flank in which a concavely curved surface portion is arranged on the one side in the rotational axis direction and the helical surface portion is arranged on the other side in the rotational axis direction.

Abstract translation: 蜗轮的每个齿具有第一齿面，在蜗轮的旋转轴线方向上的一侧配置螺旋面部，在旋转轴方向的另一侧配置有凹曲面部， 第二齿面，其中在旋转轴线方向上的一侧上布置有凹曲面部分，并且螺旋面部分沿旋转轴线方向布置在另一侧。

公开(公告)号：US20150377322A1

公开(公告)日：2015-12-31

申请号：US14736989

申请日：2015-06-11

Applicant: JTEKT CORPORATION

Inventor： Jun HAMAKITA

IPC: F16H1/16 ,  F16H55/22 ,  B23F11/00

CPC classification number: F16H1/16 ,  B23F11/00 ,  F16H55/22 ,  F16H55/24

Abstract: A plane that contains a central axis of a worm shaft and that is orthogonal to a central axis of a worm wheel is arranged at a central position of the worm wheel in a tooth width direction thereof when no load is applied to a worm speed reducer. The worm wheel is formed by a cutting operation using a hob with a hob center offset from the central position toward an offset direction corresponding to a first direction along the tooth width direction. A pair of tooth flanks has different pressure angles at the central portion in the tooth width direction.

Abstract translation: 当没有负载施加到蜗杆减速器时，包括蜗杆轴的中心轴并且与蜗轮的中心轴正交的平面布置在蜗轮的齿宽方向的中心位置。 蜗轮通过切削操作形成，该切削操作使用具有从中心位置向与沿着齿宽度方向的第一方向对应的偏移方向的滚刀中心的滚刀。 一对齿面在齿宽度方向的中央部分具有不同的压力角。

公开(公告)号：US20140102235A1

公开(公告)日：2014-04-17

申请号：US14046014

申请日：2013-10-04

Applicant: JTEKT CORPORATION

Inventor： Yuji WAKUGAWA ,  Ryuji NAKATA ,  Atsuhiro YOSHIDA ,  Wataru YAMADA ,  Jun HAMAKITA ,  Hideyuki HONKADO

IPC: B62D3/04 ,  F16H1/16

CPC classification number: B62D3/04 ,  B62D5/0409 ,  F16H1/16 ,  F16H57/039 ,  F16H57/0464 ,  F16H57/0498 ,  Y10T74/19828

Abstract: A speed reducer for an electric power steering system includes a worm, a worm wheel, and a housing. Only a meshing section where the worm and the worm wheel mesh with each other and a space between the worm wheel and the housing are filled with grease. The grease in the space is in contact with both tooth surfaces of the worm wheel and an inner peripheral face of the housing, the inner peripheral face facing the worm wheel.

Abstract translation: 用于电动助力转向系统的减速器包括蜗杆，蜗轮和壳体。 只有蜗杆和蜗轮彼此啮合的啮合部分和蜗轮与壳体之间的空间被填满了油脂。 空间中的油脂与蜗轮的两个齿面和壳体的内周面接触，内周面与蜗轮相对。