The theoretical research on the lifting mechanism of the mobile scissor hydraulic lift is carried out, the lifting mechanism is divided into modules through summarization, the general theoretical calculation formula is deduced, and the material selection and the analysis of its carrying capacity are explained in detail. Then these theories are applied to the hydraulic scissor lift, and its structure is optimized through theoretical analysis and calculation. Finally, the scissor arm is further analyzed by finite element analysis software.
According to the characteristics of the electric scissor lift, the lifting mechanism of the hydraulic lift is divided into three types, namely: a model in which a set of hydraulic cylinders pushes a set of scissor arms, and a model in which a set of hydraulic cylinders pushes two sets of scissor arms . One set of hydraulic cylinders pushes three sets of scissor arm models. According to each model, the formula of the maximum thrust required by the hydraulic cylinder is deduced, and the force formula of each main hinge point is derived.
The carrying capacity of the hoisting mechanism is analyzed. The selection of shear arm profiles, the compressive bearing capacity and the bending moment bearing capacity are analyzed. By checking the strength of the scissor arm, it is judged whether the size of the selected scissor arm meets the strength requirements.
The three-dimensional model of the hydraulic scissor lift is established, and the derived formula is applied to the lift. According to the calculation results, the structure of the lift is optimized and the strength and overall structural stability of the lift are analyzed. Apply load to key points according to its force, and obtain the force size and force distribution of scissor arm. Then compare with the theoretical calculation results.
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