点啮合蜗杆传动的啮合原理及接触区分析

Engagement principle and the anlysis of the contact area about point engagement worm transmission

运用啮合原理的理论，对延伸渐开线点啮合蜗杆传动进行分析和研究．提出用减小蜗杆分度圆直径的方法来实现点啮合，并进行了曲率及接触区分析．给出了变径量Δｄ１为２ｍｍ，２．５ｍｍ，３ｍｍ时。

This paper analyzes the point engagement transmission for extending involute wirm by applying meshing principle.It puts forward a method to bring about the point gearing by reducing the diameter of the graduation circle of the worm,analyzes the curvature and contact area and gives the dimension,shape and position of the contact area under the worm offset Δ d 1=2,2 5,3 mm.