The Simulation of Hydraulic Excavator Backhoe
Working Mechanism
Abstract
Hydraulic excavator is the major construction machine in the earth moving excavation and engineering field, and it is widely used in the mechanized construction of energy, transportation, water conservancy, urban construction and modernized military engineering field. Working mechanism is the main part for earth excavation, so the performance and reliability of working mechanism become the most important symbol of machine. The work of the mechanism is completed by compound action of three cylinders and the interaction of earth moving, of which the movement and force analysis is quite complex. In practical application, arm crack, unreasonable excavation region, machine intervene and early failures of hinge often occur, which result in tremendous loss and directly influence the development of domestic excavator field. Compared with other foreign engineering machine, domestic hydraulic excavator is lack of competitiveness and has the lower share in domestic market. Optimization of working mechanism is vital to the design of a hydraulic excavator, which is able to improve the whole machine’s working efficiency and property.
The main research and related conclusion are as followed. Firstly, the position of every key point and limited condition of realizing the excavating force have been obtained by studying the theory of the backhoe equipment. Secondly, set up the kinematical equation of the equipment. These results can help us to further analyze the backhoe equipment. Thirdly, virtual space model and limited condition have been established through CATIA software, which is simulated to get the drawing of the working area. This result has validated the working performance parameter of the machine. So the reliable data can be provided for the design and intensity test of real one.
Key words: hydraulic excavator working mechanism CATIA
