本文应用空间啮合理论，导出了指状锥面二次包络环面蜗杆传动（以下简称指锥二包）的蜗杆齿面方程和其端面、轴面、法面的齿廓方程，以及任意齿高的弦齿厚、螺旋升角等计算公式；编制了相应的计算机程序，为探讨指锥二包的蜗杆几何特性提供了理论基础和实用手段 In this paper, the theory of space meshing is used to derive the tooth profile equations of tooth with quadratic enveloping toroidal worm gear of finger conical surface (hereinafter referred to as cone two packs) and the tooth profile equations of end face, axial plane and plane, High chord thickness, helix angle and other calculation formulas; the corresponding computer program is compiled, which provides a theoretical basis and practical means for discussing the geometric characteristics of the worm of the finger cone