| The project originates from the National "863" Plan, named "The Research and Application on New Spatial Cycloid-Ball Gearing" (No. 2001AA423190). The spatial cam sliding tooth transmission has the advantages of high transmission precision, adjustable meshing clearance and good self-lock characteristic, so it deserves widely application prospects in many industry fields such as robot industry, machine industry, instrument industry, etc. Because the spatial cam sliding tooth precision transmission belongs to the spatial multi-tooth meshing transmission, the design and calculation are more complicated. This thesis emphasizes on the correlative basic theories of the spatial cam sliding tooth transmission including profile theories, the mechanics characteristic and transmission efficiency ect., and the numerical calculating programs are accomplished. The computer aided design and analysis software of the new precision transmission device is developed. The research work of this thesis is one of the important parts of this "863" plan project. Major contents of the thesis are as follows:1) According to single parameters curve enveloping theories and the constant transmission ratio condition, the theoretical profile equations of sinusoid face tooth conjugate meshing parts are established, the cutter radius's effects on the profile are discussed, solutions to real profile and cutter center locus are studied in detail. The calculating methods on the modified profile and the cutter's center trail are presented. The calculating formulas on the main curvature and curvature radius of cam and face tooth are deduced, and the calculating examples are presented.2) The mechanic analysis model of the sinusoid face tooth spatial cam sliding tooth transmission is built up. According to the Hertz contact theory in elastic-mechanics, the force analysis formulas of contact points are deduced and the resolution method is presented. The numerical calculating software is developed, and the force characteristics with different design parameters are calculated. The general law on force deformation of this transmission is obtained, and the calculated results of sinusoid face tooth are compared with cycloid face tooth and discussed.3) The slide-rolling friction force between sliding tooth and cam's meshing profile of the spatial cam sliding tooth transmission is substituted for the sliding friction force and the rolling friction force. The formula for transmission efficiency is deduced, the correlative factors' effects on the transmission efficiency are discussed. 4) With the Microsoft MFC work frame, using the object oriented high-grade programming language C++ , the Windows-based visual system software is developed to realize profile automatic calculation, mesh simulation and mechanics numerical simulation of the spatial cam sliding tooth transmission, which is a prompt and effective tool for analysis, design and numerical control machining of the spatial cam sliding tooth precision transmission. |
PDF Full Text Request