Kinematická a silová analýza mechanismu zvedacího zařízení

Abstract

This master thesis deals with the kinematic and force analysis of the shifting device mechanism. The loading force is a solitary force representing the gravity of the load. The thesis deals with several types of scissor mechanisms, which differ in the number of sections or the location of the hydraulic cylinder. The main goal is to determine the lifting force in the hydraulic cylinder. Most of the calculations are solved analytically, the numerical calculation is performed by the finite element method in the ANSYS Workbench 2020 R2 The force in the cylinder is determined by the method of release and the principle of virtual work. The results of these methods are then compared. Furthermore, the thesis focuses on determining the course of internal effects for the planar and spatial case and comparing the reactions solved by the FEM calculation with the calculation using the moment condition of the equilibrium of a planar beam.