Optimization Design And Lightweight Research For Turnover Mechanism Of Pure Electric Rear-loading Compressed Garbage Truck

The turnover mechanism is the core part of the pure electric rear-loading compressed garbage truck.It can lift the garbage bin to a certain position and cooperate with the compression mechanism to complete the garbage collection work.Therefore,the design and optimization of turnover mechanism is of great theoretical significance and practical engineering significance.Aiming at the problems of low running efficiency,the impact of the turning frame on the garbage bin during the operation process and heavy weight,this thesis takes the turnover mechanism of the pure electric rear-loading compressed garbage truck as the research object and analyzes the track requirements of the garbage bin.The turnover mechanism is designed by the guidance-line rotation method and its parameters is optimized to improve the driving force of the driving cylinder.Finally the methods of topology optimization and the shape optimization are adopted to design the key parts of the turning mechanism and reduce the weight of the parts.The main research contents are as follows:1.Design of turnover mechanism.The main components and working principle of the existing turnover mechanism of the pure electric rear-loading compressed garbage truck is introduced.In view of the shortcomings of the existing turnover mechanism and according to the operation track of the garbage bin in the feeding process,the guidance-line rotation method is used to design the turnover mechanism,and a new turnover mechanism which meets the requirements of the operation track of the garbage can and has good efficiency and smoothness is obtained.2.Parameter optimization of the turnover mechanism.The oil cylinder drive is chosen as the driving mode of the turnover mechanism and a virtual prototype model of the turnover mechanism is established in the ADAMS to verify the feasibility of the new turnover mechanism again.In order to select the proper installation position of the oil cylinder,the position coordinates of the oil cylinder is parameterized and GRG optimization algorithm is used to optimize the driving force of the oil cylinder of the turnover mechanism.3.Finite element analysis of the turnover mechanism.According to the parameters obtained by dynamic simulation in ADAMS after the parameter optimization of the turnover mechanism,the finite element model of the turnover mechanism is established in Hyper Mesh,and the static analysis of the turnover mechanism is carried out,and the strength of the turning mechanism meets the requirements.4.Lightweight design of key parts of the turnover mechanism.By using the variable density method,the topological optimization of the key parts of the turnover mechanism is carried out.On the basis of topology optimization,taking the shape and position of the weight reduction hole as the design variable,the shape of the turning arm of the turning mechanism is optimized,which makes the turning arm further reduce weight on the basis of topology optimization.Through the finite element analysis of the key parts of the lightweight turnover mechanism,the new turnover mechanism can meet the strength requirements,which proves the effectiveness of the lightweight method.Through a series of design and analysis of the turnover mechanism,the turnover mechanism with high efficiency,good smoothness and light weight is finally obtained.