The Design Of Space-curve-meshing-wheel Speeder

Microelectromechanical system (MEMS) is an emerging technology, it has low energyconsumption, miniaturization, intelligent structure, functional diversification, high sensitivityand high work efficiency, and broadly application prospects. At present, MEMS products arehigh-tech products with high added value. And micro mechanism is the key components ofMEMS products, this makes the micro mechanical transmission technology research becomeone of the hotspot research in the field of mechanical engineering.In recent years, based on a new meshing theory of establishing the space curve, a newtype of transmission mechanism-space-curve-meshing-wheel transmission mechanism wasstudied by Prof. Chen from South China University of Technology. This new type of micromechanism can be designed in small size, large transmission ratio, and be capable ofperforming movement and power transmission in tiny Spaces with arbitrary Angle of crossaxle or parallel axis. In this thesis, based on this new type of gearing mechanism, in view ofthe present market condition of inertia toy car using of two or three stages traditional geartransmission, it has a complex structure. A space-curve-meshing-wheel speeder, usingone-stage drive is designed which can perform large transmission ratio, the structure is verysimple. The main content of this thesis includes that:First, micro mechanical transmission technologies, the research status of speeder, thesignificances of space-curve-meshing-wheel speeder are introduced, and the previous researchachievements of space-curve-meshing-wheel are summarized.Secondly, under the condition of practical application, the detailed design of aspace-curve-meshing-wheel speeder is completed, covering Calculation of the dynamicparameters of drive mechanism based on the principle of space curve mesh, the curveequations of driving tine and the driven tine are determined and its curve shapes are obtained.According to the basic parameters of space curve mesh equations, the geometry size andstructure of the transmission mechanism are determined; Then, the structure of the axle andthe box dimension are designed and the3D assembly model of the speeder are set up.Thirdly,on the basis of the entity modeling and assembly, the motion simulation analysison the space-curve-meshing-wheel speeder transmission mechanism is realized, to verify thevalidity of the transmission mechanism design, which can achieve continuous and stabletransmission.Finally, the finite element analysis on the key components of space-curve-meshing-wheel speeder has been carried out. Using the finite element plug-in SimulationXpress ofSolidWorks, the driving tine and driven tine, drive axle and driven axle are analysedseparately for their deformation and stress distribution, to verify the reliability of the design.