The Innovative Design And Simulation Of The Excavator Working Device Of Telescopic Controllable Mechanism

Excavator is the most common earthwork construction machinery in engineering construction field, which is widely used in infrastructure construction, municipal, transportation, farmland, water conservancy and other fields. The traditional excavator include hydraulic and mechanical, hydraulic excavator can achieve a flexible mining trajectory, but there are hydraulic system oil pollution environment, noise, high energy consumption and other issues; although the mechanical excavator have the advantages of high reliability and long service life, the mining track can be realized relatively simple; and the function of traditional excavator was single. In view of these problems, this paper aims to study a excavator working device of telescopic controllable mechanism can be used to achieve a multi-purpose, reliable performance, energy saving and environmental protection. The driving mode of the executive component working device was changed, through the motor and speed reducer drive to complete the excavation work, which reduces the energy loss of the intermediate process, and truly realizes the clean environment protection and zero emission; compared with the internal combustion engine, has advantages of high efficiency, low noise, small vibration, maintenance, and working environment of the operator can be improved fundamentally. The expansion of boom and arm expand the scope of the working device, which in addition to completion the basic work of the excavator, but also can be used for emergency rescue and disaster relief, remove obstacles, hasty road and other engineering tasks. The arm, boom and bucket controlled by linkage which can not only realize the complex motion output and access to the flexible mining trajectory of hydraulic excavator but also can avoid the disadvantages of the traditional hydraulic excavator, and the reliability and the service life can be improved. In this paper, the specific work and research are as follows:1. To ensure the performance of working device of hydraulic excavator, formulate the overall design principles and the whole machine parameter of the excavator working device of telescopic controllable mechanism reference to the main parameters and design principles and according to the performance requirements and work tasks of the existing hydraulic excavator; the innovative design scheme of the working device of the telescopic controllable mechanism excavator was determined, major components check and drive selection were conducted.2. The 3D model of the excavator working device of telescopic controllable mechanism was established in Pro/E, and the virtual prototype was built by ADAMS, getting geometric operation parameters of excavator working device of telescopic controllable mechanism through making kinematics simulation in ADAMS, analysis and comparison the influence of the telescopic of boom and arm on the geometric operation parameters; analysis and comparison the stress of the key hinge point through making kinematics simulation, then the correctness of the model was verified; verified the rationality of power through analysis and comparison the driving power of driving rod and telescopic rod, then make a simple type selection for the motor and electric push based on the simulation results.3. The excavator working device of telescopic controllable mechanism flexible body file of the boom and arm were established in ANSYS, then the rigid-flexible coupling model of the boom and arm were established in ADAMS; extracting and analysis the maximum stress node dynamic force curve of the flexible boom and arm dangerous position, analysis the motion change and stress situation of the key hinge point of rigid-flexible coupling model of end point, and comparison with the rigid body model, which verify simulation results of the rigid flexible coupling model are more accurate, more commensurate with the actual situation, provide references for the transient dynamics, dynamic load and fatigue life analysis and research.Through the simulation and analysis of the above, provides the reference basis and lays the foundation for the trial manufacture of physical prototype of the excavator working device of telescopic controllable mechanism.