公开(公告)号：US06205879B1

公开(公告)日：2001-03-27

申请号：US09340824

申请日：1999-06-28

Applicant: Faydor L. Litvin ,  Pin Hao Feng ,  Sergey A Lagutin ,  Dennis P Townsend ,  Thomas M Sep

Inventor： Faydor L. Litvin ,  Pin Hao Feng ,  Sergey A Lagutin ,  Dennis P Townsend ,  Thomas M Sep

IPC: F16H5508

CPC classification number: F16H55/088 ,  B23F9/025 ,  F16H55/0806 ,  Y10T74/19949 ,  Y10T74/19953 ,  Y10T74/19972 ,  Y10T409/101431 ,  Y10T409/104929

Abstract: Helical or spur gear drive comprising a driven gear and driving gear wherein the driving gear has double crowned teeth defined as (i) an envelope to a family of surfaces generated by a skew or straight rack-cutter having a parabolic tooth profile in normal section and then (ii) as an envelope to a family of tool surfaces that are generated while the tool performs a plunging motion with respect to the driving gear in the direction of the shortest distance between the axes of rotation of the tool and the driving gear and tool plunging motion is varied by a parabolic function, whose variable is displacement of the tool in a direction parallel to the rotational axis of the driving gear. The driven gear has a tooth surface defined as the envelope to a family of surfaces generated by a rack-cutter which surface is parabolic cylinder or a plane. The generated pinion/gear tooth surfaces are in theoretical point contact at every instant and they produce a preselected parabolic function of transmission errors in the process of meshing. The pinion/gear exhibit reduced vibration and noise, reduced shift of bearing contact caused by misalignment, and reduced contact stresses due to convex-concave contact of tooth surfaces.

Abstract translation: 螺旋或正齿轮传动装置包括从动齿轮和驱动齿轮，其中驱动齿轮具有双冠状齿，其定义为：（i）由正常截面具有抛物线形齿轮的倾斜或直齿条切割器产生的一系列表面的外壳，以及 然后（ii）作为工具表面系列的信封，该工具表面在工具相对于驱动齿轮沿着工具的旋转轴线与驱动齿轮和工具之间的最短距离的方向执行突出运动时产生的 突变运动由抛物线函数变化，其变量是沿着与驱动齿轮的旋转轴线平行的方向的工具的位移。 从动齿轮具有被定义为包壳的齿面，该齿面由由齿条切割器产生的一系列表面，其表面是抛物线柱体或平面。 所产生的小齿轮/齿轮齿表面在每一时刻处于理论点接触，并且在啮合过程中产生传动误差的预选抛物线函数。 小齿轮/齿轮表现出减少的振动和噪音，减小由于不对准引起的轴承接触偏移，并减少由于牙表面的凸凹接触引起的接触应力。