多轴转向驱动桥转向锁止拉杆铰点位置的优化设计

Optimal Design of the Initial Position of the Draw Rod in Design of the Driveaxle Steering Lock Mechanism

开发了一种工程机械专用车辆,驱动型式为6×6,全轮转向。其2、3桥采用同步液压转向,且配有转向锁止机构。理论上,转向锁止拉杆被固定后,车辆在水平路面上行驶时各点相对静止,但实际路面总有凸凹之处,会引起超静定问题的发生,从而加剧了轮胎的磨损。为了延长轮胎的使用寿命,初步确定将轮胎与地面间的附加滑移量限制在0.2mm以内。探讨了各推力杆作上下平移或者左右移动时,驱动轴在跳动过程中这些因素对轮胎产生附加摆角的影响程度。优化结果表明,即使跳动量达到100mm,轮胎与地面的最大附加滑移量也仅为0.105mm,达到了预期的优化目标。

On e 6×6,all-wheel steering engineering vocational vehicle is developed.The sy nchronous hydraulic steering system equipped with steering lock mechanism is app lied in the2 rd and3 rd axles.In theory,once the steering lock draw rod is fixed,the relevant po ints are relatively static when the vehicle runs on even roads.But actual road s are always uneven,which results in the redundancy problem and then increases tire wear.In order to prolong tire life cycle,the addi-tive slipping between the tire and road surface is initially determined to be below0.2mm.Therefor e effects and their effect degree of vertical and horizontal movements of pushro ds during driveshaft's jounce and rebound on tire's additive angle are discussed .It is shown by optimization results that when driveshaft's displacement is1 00mm,the max additive slipping between the tire and road surface is only0. 105mm,which reaches the optimization target.