变转矩限滑差速器非圆锥齿轮结构强度分析

发布时间：2018-03-25 19:50

本文选题：差速器　切入点：非圆锥齿轮　出处：《机械设计》2016年04期

【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。
[Abstract]:Aiming at the problem of low locking coefficient of variable torque limited slip differential of off-road vehicle, a new type of non-bevel gear structure of limited slip differential is proposed. The ratio of planetary gear to half shaft gear tooth number is 1: 2, and the transmission ratio is 1 cycle with planetary gear rotation. The variable amplitude of transmission ratio can be maximally increased to 卤40, and the theoretical locking coefficient of the differential is increased from 1.857 to 2.33, which enhances the passing property of the vehicle. According to the characteristics of non-bevel gear transmission, the finite element modeling of the differential structure is proposed. Method of analysis: first, the rotational displacement of pinion is calculated by using the method of node coupling of contact surface, and then the contact friction model is established. The working stress of each bevel gear is obtained by using rotational displacement as the input condition. The finite element simulation calculation of the non-bevel gear with different structure is compared, and the transmission test is combined with the finite element method. The results show that the improved structure has better performance and strength, and the simulation method is correct and effective.
【作者单位】：军事交通学院军事物流系;
【基金】：天津市应用基础与前沿研究计划资助项目(12JC2DJC34600)
【分类号】：TH132.41

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