Design And Research Of Ejection Shrinkage Device Based On Multi-layer Nested Structure

Domestic and foreign researchers have done a lot of research and innovation work on ejection mechanism and buffer mechanism,but these mechanisms or devices only have a single function.Considering that the ejection mechanism releases kinetic energy while the buffer mechanism absorbs kinetic energy,in order to study the efficient transformation of kinetic energy,this paper combines the ejection and buffer motion.On the basis of fully studying the motion characteristics and energy conversion forms of ejection and buffering,a multifunctional device integrating ejection and buffering functions is designed.The specific research work includes:(1)The energy conversion form and motion characteristics of the mechanical ejection mechanism and the spring buffer are analyzed,and the common points of the two are studied.An innovative ejection shrinkage mechanism based on the multi-layer nested structure with both ejection and buffer is designed.The equivalent stiffness,equivalent energy and equivalent mass of the mechanism are calculated for the multi-spring system.(2)The dynamic model of ejection motion of the mechanism was established based on the model design of the ejection shrinkage mechanism.MATLAB software is used for digital simulation analysis of the model.At the same time,the ADAMS software is used to carry out the 3D dynamic simulation analysis.The influence of different spring stiffness Settings in each sleeve of the ejection shrinkage mechanism on the ejection velocity of the device was studied.(3)The shrinkage dynamics model of the ejection shrinkage mechanism was established when it was buffered.The dynamic simulation of the shrinkage motion was carried out by ADAMS,and the influence of different spring stiffness values on the buffer energy was analyzed.Based on the analysis of the effect of motor traction on buffering,a hybrid shrinkage simulation model under motor traction was established,and the buffering motion characteristics of the device under different motor traction speeds were studied.(4)A three-dimensional structural model of a multi-layer nesting ejection shrinkage device is designed.The experimental prototype was processed and manufactured by means of3 D printing and mechanical processing,and its drive and control system was built.Finally,the experimental prototype was compared with several groups of ejection and buffering motion experiments,and the experimental results were analyzed.In this paper,the key technologies such as rigid-flexible coupling structure design,three-dimensional model establishment,dynamic simulation analysis and drive control of the ejection shrinkage device based on multi-layer nested structure have been deeply studied.The research results have guiding significance for the design,analysis and application of ejection and buffer devices.