Hydraulic lifting platform is a hoisting machinery widely used in warehouses, airports, stations, docks, stages, and automated production lines. Its performance directly determines the load-bearing and comfortability of the lifting platform. The hydraulic lifting platform with loads requires the piston thrust of the hydraulic cylinder to be as small as possible, and the manned hydraulic lifting platform requires the lifting cage
speed of the lifting platform to be stable. At the same time, the arrangement of hydraulic cylinders is restricted due to the limited installation space. Therefore, how to arrange the hydraulic lifting platform in a limited space while satisfying the load-bearing and comfortability of the lifting platform is an urgent problem to be solved in the process of improving the overall performance of the lifting platform. This subject takes the double-beam articulated hydraulic cylinder arrangement method of the hydraulic lifting platform as the research object, and comprehensively analyzes the problems of the hydraulic cylinder piston thrust in the traditional hydraulic lifting platform hydraulic cylinder arrangement and the uneven lifting speed of the platform. Strive to find a hydraulic cylinder arrangement that can reduce the piston thrust of the hydraulic cylinder and stabilize the lifting speed of the platform under the condition of meeting the structural design requirements. First, using theoretical mechanics to study the kinematics and dynamics of the double-beam articulated lifting platform driven by the hydraulic cylinder, the relationship between the hinge position of the hydraulic cylinder and the piston thrust and lifting speed of the lifting platform is obtained, and the lifting process of the lifting platform is analyzed The changing law of the thrust and lifting speed of the middle piston determines the optimal parameters that affect the thrust and lifting speed of the piston of the lifting platform. Secondly, through the related theory of mechanical optimization design, it is determined that this mechanical optimization design belongs to the multi-objective binary constraint optimization design. Through comparison, the corresponding optimization methods are selected respectively, and the optimization programs are written according to their respective flowcharts. Respectively, when the hydraulic cylinder is selected, the hinge position of the hydraulic cylinder under three different conditions is the smallest piston thrust, the most stable lifting speed, and the minimum piston thrust and the most stable lifting speed. And analyzed the optimization results. Finally, in view of the above optimization results, a new solution was proposed to solve the problem of insufficient lifting height of the lifting platform, and the solutions were compared, and finally the hydraulic cylinder layout scheme of the hydraulic lifting platform driven by the entire hydraulic cylinder was determined. Through the kinematics, dynamics analysis and mechanical optimization design of the double articulated hydraulic lifting platform driven by the hydraulic cylinder, it provides a theoretical basis and feasible for further reducing the piston thrust of the scissor mechanism driven by the hydraulic cylinder and improving the speed stability of the lifting platform Optimize the design method.
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