Optimization Of Front Shaft Parameters And The Steering Transmission System On The 6×2 Tractor

With the rapid development of transportation industry in our country appear on the market more and more of the double front axle steering,single 6 x 2 tractor drive axle structure,the model in the early stage of the sales market feedback the main failure of the steering wheel abnormal wear failure.This topic mainly from 6 x 2 tractor steering transmission system design and the front axle position parameter and ?,? steering front axle bar system design,to reduce the abnormal tyre wear fault,for the purpose of optimizing6 x 2 vehicle steering system.This thesis first from 6 x 2 vehicle steering characteristics,based on the double front axle of vehicle steering characteristics-the relationship of ackerman theory Angle and I,II axis movement interference theory research,using 3 d software CATIA skeleton steering transmission system modeling and DMU movement simulation.Through movement simulation output the car front wheel steering and steering and suspension movement interference quantity,using MATLAB and EXCEL data processing,combining the theory of steering system and suspension system movement interference and ackermann Angle error theory analysis,found the car tire abnormal wear is the main reason for II axial overload caused by steering and suspension movement interference amount is larger,causing the vehicle in the process of running toe Angle change lead to II axis,the secondary reason for II axis ackerman theoretical Angle deviation,as a result of each wheel rotation center is a center.Then the paper USES CATIA DMU,graph method,MATLAB three optimization methods to optimize the trapezoidal base Angle,so that it basically satisfies the Angle relationship of ackerman theory;By using CATIA DMU and drawing method,the two methods of optimizing steering and suspension motion interferometric quantity,and the II axis can satisfy the small amount of motion interference in the case of overloading 150%.The correctness of this optimization method is verified by experiment and use of validation.At the same time,several optimization methods in this paper,by comparing the process and results,obtained a by CATIA three-dimensional mathematical model establishment and DMU movement simulation,the parameters of the front axle and steering and suspension movement interference quantity movement simulation optimization,combined with MATLAB and the objective function optimization algorithm,a more rapid and accurate we need to optimize the parameters.Finally through the optimization of before and after optimization experiment contrast,verified by analysis results of the failure mode of trial model,also verify the correctness of theproposed optimization method.Found in the test process of assembly process optimization is also necessary to increase the Angle tester in the process of front axle assembly to ensure that I and II axis parallel,through continuous adjustable bushing rod structure optimization adjustment precision of the rod length,assembly process control are greatly improved,and using dynamic vehicle detection synchronicity equipment inspection and adjustment,fully guaranteed the vehicle assembly and design state.