Mechanical Analysis Of Scissors Aerial Work Platform And Optimization Of It's Hinge Positions

Scissors aerial work platform is widely used the work high above the special equipment.The mechanical structure of its unique,make the lifting platform lifting has higher stability,higher bearing capacity,the work high above the large range,and is suitable for many people work at the same time.As the cutting platform to smooth,high carrying capacity development,improve the working efficiency of the homework,to reduce the oil cylinder maximum thrust at work,reduce the force applied on the fork scissors mechanism research is particularly critical.In this paper,we study on the arrangement of the hydraulic cylinder without interference occurs,adopt the method of combining theoretical derivation and simulation analysis of oil cylinder hinged point installation location is optimized,thereby reducing the maximum thrust of oil cylinder and improve the increased stability of the working platform.The main research contents and results were as follows:(1)Through the study of the kinematical analysis of shear fork structure,obtained the driving hydraulic cylinder piston movement and the relationship between the velocity of bubble rising velocity and work platform,the related parameters of rising velocity stability influence platform;The scissor platform of cylinder is analyzed with mechanics,and key parameters that influence the oil cylinder thrust parameters;Fork scissors mechanism of each hinge point location for force analysis,cut the hinged fork arm hole stress distribution are obtained.(2)Cutting platform was built based on AMESim software simulation model,get the dynamic lifting process of the shear fork,and the performance of shear fork structure parameters and the change of some parameters curve,including the rising velocity curve of platform,oil cylinder lifting force curve,etc.(3)Through theoretical derivation and simulation analysis in the hydraulic oil cylinder without interference occurs,in order to reduce oil cylinder maximum thrust for the target optimize the cylinder installation hinge point location,reasonable oil cylinder installation location;Through hydraulic tester measuring cylinder piston in the thrust curve of before and after optimization,optimization on the former were tested,the curve obtained coincided basically with the graphics,proves the rationality of the optimized scheme.(4)With ANSYS Workbench to change oil cylinders after installation hinge point location of shear fork arm statics calculation and fatigue life analysis,grasp the stress concentration and the maximum shear fork arm fatigue damage area,estimates the fatigue life of shear fork arm,carries on the finite life design,on the basis of the structure improvement,provides reference for the design of the shear fork arm.The above research results have been successfully obtained optimization scheme of the desired effect,and is verified in physical testing experiment.This plan will be structure more complex double oil cylinder shear fork platform optimization to provide the reference basis.