直廓环面蜗杆传动类型和修形参数的选择

对直廓环面蜗杆传动类型进行分类，对现有主要修形方法进行了分析；提出Ⅱ型为首选传动类型；以△i和△a综合修形最佳，引入修形量△b＞0可以扩大蜗轮齿面接触区，并给出了△i、△a和△b修形参数的选择范围。

Classification and Modification Parameters of Double Enveloping Worm Gearing with Straight Side Profile

In this paper, the gearing type of double enveloping worm is classified, and the main existing modification method is also analyzed. The calculated results show that the type II is the preferred gearing type, and the △i and △a complete modification is the best one. The contact zone of worm wheel tooth surface can be enlarged by introducing the△b＞0 modification variable. At last,the optimum scope of △i, △a and △b modification parameter is also presented.