Parametric Design Of Short Flexspline Harmonic Gear And Finite Element Analysis

Being based on the flexible deformation, harmonic gear drive achieves transferring its motion or power and is made up of short flexspline, rigidity gear and wave generator. It has many merits such as big ratio of transmission, small weight and capacity, high drive accuracy and so on. This paper studied three parts of the theory of engagement and parameterization design and finite element analysis.The primary research contents of this paper including the four following aspects: Firstly, based on the elastic theory, the paper studied the selection principle of main parameters of harmonic gear drive; and designed the structure of major components which include short flexspline, rigidity gear and wave generator. Secondly, on the platform of Pro/E and making use of the development tools of Pro/Toolkit and Vc.Net, the Parametric Design of Short Flexspline Harmonic Gear was achieved. This system can output three-model, show the parameters and their values of current model, modified the size of non-relationship-driven capabilities. Thirdly, the paper establishes a finite element analysis model of the Short flexspline in the no-load and load conditions, studied stress and displacement field, and compared the distribution of stress and displacement in different status. Fourthly, in the no-load and load conditions, we studied the affection of shell thickness on the short flexspline stress, and got a general range of shell thickness and diameter of short flexspline ratio by compared the result.By designing parameterization design and finite element analysis on Short Flexspline Harmonic Gear, they have provided a kind of way of thinking and method for the design of other Harmonic Gear.