Abstract: Calculation and design of non-circular gears are complex and difficult because of their non-circular pitch curves and current three-dimensional design software can not directly realize the modeling of non-circular gears. According to non-circular gear design theory, an elliptical type gear parametric design and motion simulation system is designed through secondary development of SolidWorks by using Visual Basic 6.0, through which the 3D parametric modeling and motion simulation of elliptical type gears can be realized. The system development process is discussed in the paper, and application examples show that the system is of user-friendly interface and correct design. The complexity of calculation and the difficulty of 3D modeling in elliptical type gears design are solved. This system can improve design precision, shorten the development cycle, and guarantee the quality of products.

Key words: computer application, elliptical gear, parametric design, motion simulation