Lathe gearbox is important gear on a lathe, in the face of this kind of bodily form bulky and expensive mechanical and electrical equipment, to study its internal structure, the special traditional way of learning is to use 2 d written information and simple geometric model method of combining the food to interpretation of learners, to make them understand and study the working principle of variable speed mechanism. By using physical model will be affected by the number of models, environmental factors such as limit, reduce the learning efficiency.
This topic research the engine lathe gearbox transmission principle and design method of virtual simulation system, builds a able to display the 3 d simulation of shift gear working principle. Subject is the purpose of using Pro/E 3 d model is set up and model library, virtual assembly, animation, motion characteristics.
Key words: Transmission, the simulation system, Pro/E, movement characteristics