推导了大锥面二次包络环面蜗杆传动齿面方程和主要啮合指标的数学表达式 ,通过实例计算得出这种新型蜗杆副具有类似于平面二包蜗杆副的传动啮合性能 ,并得出由于采用大锥面砂轮作为工具母面磨削蜗杆两侧齿面时不需翻转磨头 ,该新型蜗杆副比平面二包的生产效率更高 The mathematical expressions of the gear surface equation and the main meshing index of the large conical double enveloping worm gear are deduced. The calculation results show that this new worm gear has the meshing performance similar to that of the planar double wrapping worm gear, Out of the use of large cone-shaped grinding wheel as the tool to grind both sides of the worm tooth surface without turning the grinding head, the new worm than the second plane package production efficiency