全地形越野车前双横臂独立悬架与转向系统的设计分析

Design and Analysis of Double-wishbone Suspension and Steering Systems of an All Terrain Vehicle

针对一全地形越野车使用中前轮磨损严重、转向横拉杆易断裂、悬架与转向系统球头磨损严重等问题,建立了该车前双横臂独立悬架和断开式转向系统的运动学分析模型,以前轮定位参数的变化、轮胎的横向滑移和两个前轮的转角关系与由阿克曼定理确定的转角关系之差最小为优化目标,对其悬架系统和转向系统进行了优化计算,根据优化结果试制的新车,解决了原车悬架与转向系统存在的若干问题。

To deal with some problems exist in the suspension and steering systems of an all terrain vehicle （ the severe wear of the tire and ball joints, and the deformation and rapture of the tie-rod, etc. ） , a model for kinematic analysis on double wishbone suspension and steering systems is set up. Taking the minimum of the weighted sum of the changes in wheel alignment parameters （WAP） , the lateral displacement of front wheel and the deviation of front wheel turning angle from the angle determined by Ackerman geometry as the optimized objective, an optimization is conducted on suspension and steering systems. A new vehicle is then trial manufactured based on the results of optimization, in which the problems previously existed in original vehicle are solved.