Research On Modern Design Of Loader Working Equipment

Wheel loader is a kind of widely-used engineering vehicle, and the design of loaderworking equipment is of most importance in the enterprise product development. After nearly30years of development, the modern design method has been applied to the research anddevelopment of the loader, and has made significant progress in the computer-aided design,computer aided analysis and simulation, design optimization, and finite element analysis etc.Moreover, the modern design method has developed a number of professional software,mainly in the loader computer-aided design and optimization of the design. As users’requirements for product of higher quality and performance accumulating, a further demandin product design and development using modern design methods arise in the enterprises. Inorder to fill the blanks, this article mainly completes two aspects of work, which aredeveloping a loader working equipment design database program, implementing theautomatic parametric modeling of loader working equipment three-dimension model, anddynamics simulation of loader working equipment.Based on the large amount of data that produced by the process of computer-aided designof the loader working equipment, to meet the demand of the design process and planning, thisarticle using the Visual FoxPro platform design a loader working equipment database systemfor the purpose of aiding the design and planning process. The database system includes4modules, such as management module, query module, file management module and thehelping module. This article proposes a method of Classification of the loader workingequipment data, designs the overall structure of the database system, and fulfills the rapidextraction of complex data. Furthermore, the system displays the parameter information bytreeview helping the designers to complete the query in columns and summary, whichenhance the efficiency of product design.Besides, using Top-down design method, a three-dimension model of loader is built onPro/E platform. A uniform reference system is established by using skeleton model, whichprovides reference for physical model through geometry copy and publish, improves theindependence of components, avoids assemble regeneration failure caused by deletion ormodification, and enhances stability of the model. What’s more, Key parameter list ismotivated through layout, and components design is brought into correspondence with upperdesign intention by defining parameter relation in skeleton model. After that, Pro/E three-dimension model is redeveloped through VB and Automaton Gateway plug-in function,and through the redeveloped interface the designing of overall arrangement and component isachieved. As a result, multi-component modification can be done through one change of keyparameter in redevelopment interface, which achieves assemble parameterization, avoidsreopening component models and improves design efficiency. Finally, a dynamics simulationis completed on the boom cylinder load while the loader working equipment is underdischarging conditions, the results of which prove that the ZL50loader boom cylinder designcan meet the requirements and will not result in the retraction phenomenon.After the probationary of the program established above, the results show that the dataprocessing function, which is mainly about the models being design and the reference models,can satisfy the designers’ demand. By using the program, the renewed three-dimension modelcan be achieved effectively by simply changing some parameters data. Besides, using therenewed model, the movement performance and the possible interference in the mechanismcan be showed conveniently, and the renewed model can be quickly transformed into a finiteelement model.