新型限滑差速器及空间凸轮结构的优化  

Research on novel LSD and cam mechanism optimization

作　　者：程云建[1] 姜虹[1] 王小椿[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《北京交通大学学报》2011年第4期163-167,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金："十一五"国家重大科技专项资助(2009ZX04009-011)

摘　　要：针对现有轮式车辆中限滑差速器存在的问题,提出了一种新型限滑差速器总成结构.首先根据凸轮机构从动件数学模型及运动规律,利用共轭曲面包络原理及微分几何理论,推导出新型限滑差速器关键元件空间凸轮机构的工作廓面方程及在接触点处的诱导法曲率方程,然后以接触点处的诱导法曲率最小化,作为新型限滑差速器空间凸轮结构优化设计目标.结果表明,诱导法曲率随从动件半径和运动周期增大而减小,有利于减小曲面间的接触应力;但由于从动件参考工作区域变小,局部磨损加剧,使新型限滑差速器机构工作寿命缩短.According to problems existed in limited slip differential （LSD） mechanism used in wheeled vehicle currently, a novel LSD was proposed. Based on conjugated surface meshing theory and differ- ential geometry theory, the formulas of the induced normal curvature on contact points and the formu- las of the working profile of the new LSD cam mechanism were derived firstly. Then optimal design of space cam mechanism of LSD was conducted with the optimization target of minimum induced normal curvature. The experiment showed that the induced normal curvature would become smaller when the period and radius of the follower got bigger, which is beneficial to decrease the contact stress. The fol- lower would wear worse as the contact area becomes smaller, which would shorten the working life of the new LSD mechanism.

关 键 词：空间凸轮 共轭曲面 诱导曲率 

分 类 号：U463.218[机械工程—车辆工程]