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Currently, we assume in a civil issue gear design, the need to develop a small-volume, long-life, high load-bearing capacity of the harmonic gear reducer, the reliability of the transmission, weight, volume, hysteresis, torsional stiffness and dynamic performance, etc. enormous demands. The our existing cup-shaped flexspline harmonic gear drives, axial dimensions, can not meet the requirements of the installation space; existing Duantong cup-shaped soft round harmonic gear transmission, although the axial size is smaller, but not inevitably brings the problem of stress increased dramatically, resulting in its carrying capacity is not high;, resulting in its high cost, and short life due to the presence of the flexible bearing. This Professor Liang Xichang an independent intellectual property rights on the basis of the harmonic drive new harmonic gear reducer - equivalent elliptical harmonic gear reducer (invention patent application number: 200610095286.1). This article is based on the foundation of this patent devised a way to meet the design requirements of the new harmonic gear reducer, innovation in the structure of the harmonic gear reducer and drive theory, based on ADAMS dynamics simulation, finite element analysis based on ANASYS the a more systematic analysis and research. The main content of this study can be summarized as follows: 1, introduced in the system and analyze the harmonic gear drive technology development, research status, trends, strengths and weaknesses, and several new harmonic drive device characteristics and to compare the existing product performance and The gap on the basis for the project installation space, life, carrying capacity of the transmission demanding requirements, the research, design, development of new harmonic gear transmission main content. To introduce the principle of harmonic gear reducer, institutions, motion analysis method; established a mathematical model of the flexspline deformation shell theory ring after deformation characteristic curve equation flexspline; tooth profile conjugate theory established meshing interference theory, to avoid interference engagement geometry should satisfy the condition; summarizes the the meshing geometry design calculation steps, developers can directly call harmonic gear reducer design Excel calculation table. Proposed a new harmonic gear reducer - equivalent to the structure of the the elliptical harmonic gear reducer; get Excel to calculate the form of meshing geometry and parts of the equivalent ellipse harmonic gear reducer structure size design calculations. 4, from meshing interference, transmission efficiency, force, strength and stiffness of the design equivalent the the elliptical harmonic gear reducer theoretical analysis reducer designed in theory does not interfere, the transmission efficiency of up to 90.3% in terms of strength and stiffness to meet the requirements. 5, the use of three-dimensional design software Pro / Engineer solid modeling of the various components of the the equivalent elliptical harmonic gear reducer and virtual assembly and interference analysis to obtain the reducer global and dynamic movement process not interference, in order to verify the correctness of the theoretical analysis. 6, the equivalent the the elliptical harmonic gear reducer PRO / E assembly model into ADAMS establish a virtual prototype model and its dynamics simulation analysis, the speed of the transmission components, angular acceleration and force simulation curves diagram, respectively, of these simulation curve analysis, the use of the simulation curve obtained corresponding processing computable mechanism equivalent moment of inertia, and then the data from these simulation results with the theoretical values ??are compared. Finally, the virtual prototype model of geometric dynamic simulation, animation on the soft round shape change during exercise and between the teeth in the dynamic meshing process. 7, ANSYS Workbench ANSYS software and its new generation of products was introduced, the application of ANSYS Workbench flexspline modal analysis flexspline natural frequencies and mode shapes, as well as soft bye loads of deformation and force provide the basis for the flexspline improved design; carrying static finite element structural analysis and reducer transmission components, draw loads of various parts of the displacement and deformation, stress, the maximum principal stress, minimum principal stress and tooth maximum stress values ??in Fig. According to the St. Venant theorem reducer simplified system automatically defined contact, add a fixed constraint to establish the model of the machine finite element modal analysis, model 12 order natural frequencies and mode shapes calculated.
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