摘要
针对越野车变转矩限滑差速器锁紧系数较小的问题,提出了一种新型限滑差速器非圆锥齿轮结构,行星齿轮与半轴齿轮齿数之比为1∶2,传动比以行星齿轮转1圈为1个周期,可以最大限度地提高传动比变化幅值,达到±40%,使差速器的理论锁紧系数由原来的1.857增加到2.33,增强了车辆的通过性。针对非圆锥齿轮传动的特点,提出该差速器结构有限元建模、分析方法:先用接触面结点耦合的方法求出给定转矩下小齿轮的转动位移,再建立接触摩擦模型,利用转动位移作为输入条件求得各锥齿轮工作应力。对不同结构的限滑差速器非圆锥齿轮进行不同方法的有限元仿真计算比较,结合传动试验,结果证明所改进的结构性能和强度更优,所采用的仿真计算方法正确有效。
A new type of limited slip differential with noncircular bevel gearing for off-road vehicles was put forward aiming at the problem of smaller locking coefficient. The planet gear had a half number of the half-axle gear teeth. The transmission ratio was 1 period as one revolution of the planet gear, which could fully improve the change range of transmission ratio as much as ±40%. This improve the theoretical locking coefficients of 2.33, far above 1.857 of state-of-the-art, which would help to improve the passing capability of the vehicle. The finite element modeling and finite element analysis were presented aiming at the characteristics of Noncircular Bevel Gears transmission. The rotation displacement of the pinion was figured out under a certain torque using the method of contact node coupling. Then, the contact fiction model was established to obtain every bevel gear working stress using rotate displacement as the input condition. The FEM simulations in different methods were compared on the limited slip differentials with different structures. The results showed that the improved structure property and strength were better. The applied simulation method was correct.
出处
《机械设计》
CSCD
北大核心
2016年第4期54-59,共6页
Journal of Machine Design
基金
天津市应用基础与前沿研究计划资助项目(12JC2DJC34600)
作者简介
贾巨民（1965-）男，教授，博士，研究方向：机械传动与越野车辆通过性，已发表论文30篇。
张学玲（通信作者）（1970-）女，副教授，博士，研究方向：机械动力学、机械性能仿真与优化设计，已发表论文20余篇。E-mail：Zhangxueling0@163．com
