Optimization Design Of The Double Front Axle Steering System For A Mine-use Rubber-tyred Vehicle

As special vehicles used for mining, excellent mining rubber-tired vehicles shall have long continuous attendance time, easy maintenance, low failure rate, high flexibility, relatively small tyre wear, the characteristics of mining vehicles mostly used by domestic enterprises can only cope with a single specific occasions, economical efficiency of them is general. Combined with the use of hydraulic and electronic components, manufacturing and maintenance cost of them is relatively higher; With the speeding up of the mining industry transformation, therefore, we need to design and manufacture a mine vehicle which has a good steering performance, can adapt to a variety of occasions and economical and practical value.In this paper, a mining rubber-tired vehicle steering system optimization design is used as the research content, the mining rubber-tired vehicle steering trapezoid truss and steering drag link of bar system are designd and optimaled too, the power steering gear and steering system are fitted, the virtual prototype analysis is used in checking the interference of steering and suspension. Specifically speaking, firstly, the general layout, type, style of steering system is analyzed; secnedly, the circulating ball power steering gear is selected as a redirector, monolithic trapezoidal mechanism is used as steering system, selection of straight rod system can ensure the movement agency relationship of the two sets of trapezoidal mechanism. Then, the double front axle steering arm length of two sets of trapezoidal mechanism and the perspective of the base are designed at first time, as so as the optimized design of drag link mechanism; After that, three kinds of mathematical model about teering mechanism are defined. By compiling optimization function, selection and weighted optimization results, design parameters of the trapezoidal mechanism after optimization are carried out; In the next, match for the steering system and the power steering gear is done, the bench test used to determine the power steering gear is done, too; Finally, by using the virtual prototype of the suspension and steering system, interference problems between them are analyzed. By this way, a further optimization of steering mechanism is done, eventually, ideal design parameters are obtained.In this paper, the traditional experience design and optimized design of wave arm and straight rod,the optimal design based on the different definitions of error and the optimal design of the suspension-steering mechanism interference in virtual prototype are combined as one program. Through the integrated optimization design of rubber-tyred vehicle steering, performance reach an ideal level, which can effectively reduce tire wear and ensure a better flexibility, and has the characteristics of economical, low failure rate. This paper has certain guiding significance to practical production and the design or research of vehicles in this kind.