Entire parameterization of helical gear model is provided with a tremendous influence on modeling efficiency of vehicle gearbox or oil pump

current swept modeling method couldn’t achieve an all parameterized model of helical gear

and the disadvantage of substitution circular arc transition curve for actual transition profile is pointed out.For modeling an all parameterized model of helical gear

author brought forward an revolved modeling method for the first time

and it is necessary that an entire model of helical gear is disassembled three sub-models.With all profile lines and helices of tooth constructed by rule curve

the achieved model of gear is accurate and reliable and all parameterized.