车辆主销内倾引起的回正力矩的解析.pdfVIP

2 0 0 8 年 7 月 农 业 机 械 学 报 第 39 卷 第 7 期 车辆主销内倾引起的回正力矩的解析 陈士安 　邱 　峰 　何 　仁 　陆森林 　　【摘要】　推导出车辆主销内倾引起的回正力矩准确的解析表达式 ,并进行了试验验证 。利用空间几何关系推 导出前轮转动带来的前轴抬高量与前轮转角 、主销内倾角 、主销后倾角 、车轮中心主销后倾偏移距等之间准确函数 关系式 ;根据转向时克服回正力矩所作的功等于前轴抬高导致其载荷势能的变化量 ,对前轴载荷势能的变化量求 前轮转角的导数 ,得到了回正力矩准确的解析表达式 ;对某试验车辆前轮转动时的前轴抬高量进行了试验测量 ,试 验测量数据与理论计算值基本吻合 ,表明推导的主销内倾引起的回正力矩的函数解析表达式准确可靠 。 关键词 : 车辆 　主销内倾 　回正力矩 　解析 中图分类号 : U46 16 文献标识码 : A Analysis of Selfal igning Torque f rom Vehicle Kingpin Incl ination Chen Shian 1 ,2 　Qiu Feng2 　He Ren1 　L u Senlin1 ( 1. J iangs u Univers ity , Zhenj iang 2 120 13 , Chi na 2 . H iger B us Comp any L i m ited , S uz hou 2 15026 , Chi na) Abstract A p recise analytic exp ression of selfaligning torque from vehicle kingpin inclination was given . The relation equation of front axle elevation wit h steered wheel angle , kingpin inclination , caster and caster off set at wheel center was inferred accor ding to sp atial geomet ry . The potential energy increasing of load on front axle was up to power to overcome t he selfaligning torque from kingpin inclination when steered wheel angle was changed . The analytic exp ression of selfaligning torque wit h steered wheel angle , kingpin inclination , caster and caster off set at wheel center was got by calculating derivative of potential energy increasing of load on front axle by steered wheel angle . Finally , t he elevation of front axle was tested when steered wheel angle was changed on an experiment al vehicle . The result s show t hat t he testing dat a agrees well wit h t he t heoretical