Simulation Design Of Gear Box Of The Wheel Loader

For the purpose of overcoming the heavy and complicated calculation and drafting and formalization difficulty of conventional design of construction machinery, changing the backward situation that the design and manufacture of construction machinery still depend on the two-dimensional engineering drawings and seeking a theory or way to design and manufacture a machine quickly and with high-quality, taking the wheel loader as an example, which is a typical model of shovel-transport machinery, and combining the research subject—the CAD system of construction machinery, cooperated with the research section of the New Yellow River Construction Machinery Limited Co. (NYRCMLC), studied on the computer aided simulation design of the gear box's technique shape of the wheel loader by comprehensive utilization of the simulation design theory and the parameterized design software Pro/Engineer, a type of three-dimensional entity modeling system according to the technique and drawing data of the wheel loader ZL50C's gear box made in the NYRCMLC to realize the automated design and manufacture of construction machinery.(1) Generalized the development of conventional design of construction machinery and the mechanical CAD / CAM. Keeping close connection with the characteristics of structure and performance of the wheel loader' gear box, clarified clearly the purpose, significance and basic thinking way of studying the subject, lay the theoretical foundation for the computer aided simulation design of gear box of the wheel loader.(2) Comprehensively using the simulation design theory and Pro/Engineer, carried on the study on the computer aided simulation design of the details and components of the gear box, completed the three-dimensional solid modeling design and the generation of two-dimensional engineering drawings of the details as well as the subjective assembly of the gear box according to the technique and drawing data of the wheel loader ZL50C's gear box, finally obtained the structural shape of the newly designed gear box.(3) Making use of the Pro/Mechanism function, carried out the kinematical simulation of the transmitting mechanism of the gear box according to its subjective assembly construction and the variation of tractive power, tractive force, torkoue and velocity measured under the action of rated load through the wheel loader's tractive test; Then carried on the finite element analysis of the exported axis's stress by ANSYS; Finally studied on the data-controlled imitating machining of machine parts. The above studies are of significance to check the machine part's reasonable assembly structure, strength and to realize the data-controlled machining of machine parts. The research results indicate that the study on the computer aided simulation design of the construction vehicle's gear box by using the simulation design theory and the Pro/Engineer makes the no-paper automated design and manufacture of machine product, and the various computer aided technique analyses and performance imitations reach the practical application, which is of importance for overcoming the heavy and complicated calculation and drafting and formalization difficulty of conventional design method, speeding up the design and drafting of machinery and equipments, lowering the development expense, advancing the renewal of machine products, improving the machine's quality, performances and reliability as well as their competition in the market.