LOADED TOOTH CONTACT PATTERN ANALYSIS FOR STRAIN WAVE GEAR WITH NON-ELLIPTICAL WAVE GENERATOR

This paper presents a new non-elliptical wave generator for;train wave gear to improve its contact pattern quality. The new vave generator has a polynomial profile at one cross section, hen crowned along the lead direction. The lead crowning uses a mrabolic function with crowning amount controlled by mrabolic coefficient. Loaded tooth contact pattern analysis)ased on finite element method is used to evaluate the new lesign. The result shows that the new design will avoid the edge ontact between wave generator and flexspline, which reduces ontact pressure and improve the wearing life of the gear. It also mproves the contact pattern quality of the tooth surface. comparing with elliptical wave generator, the new wave;enerator with polynomial profile and lead parabolic crowned lurface offers more design freedom to improve strain wave;ear's performance. The parametric equation of the new wave;enerator is defined intuitively, and it can be easily adapted for my type of strain wave gear. Furthermore, the finite element nodel for the strain wave gear is a new development and application for Loaded Tooth Contact Analysis (LTCA).