一、前言平面直齿蜗轮付是以蜗轮为基础件,以蜗杆包围蜗轮的单包型蜗杆传动付。其基础件蜗轮的齿面是一簇切于一个共同圆柱面的平面,就象一个直线齿形的直齿轮;而蜗杆外形呈腰鼓状,齿面则是在共轭运动过程中由蜗轮齿面包络展成的曲面。显然,这种啮合制,使它具有一系列内在长处:如基础件蜗轮的齿面形状简单,容易制造准确;接触线方向好,容易形成润滑油膜,因之承载能力大,同时工作齿数多,对误差有良好的平均作用等等。这些长处, I. INTRODUCTION The planar straight-worm gear is based on a worm gear and a single-type worm gear driven by a worm gear. Its basic parts worm gear tooth surface is a cluster cut in a common cylindrical surface, like a straight tooth-shaped spur gear; and worm shape was drum-shaped, tooth surface is in conjugate movement by the worm gear Enveloping surface. Obviously, this meshing system, it has a series of inherent advantages: If the basic components of worm gear tooth shape is simple, easy to manufacture accurate; contact line direction, easy to form a lubricating film, because of its carrying capacity, Have a good average effect on the error and so on. These strengths,