恶劣工况下越野车用等速万向节接触应力和保持架强度分析  

CONTACT STRESS AND CAGE STRENGTH ANALYSIS OF CONSTANT VELOCITY JOINT FOR OFF-ROAD VEHICLE UNDER BAD WORKING CONDITIONS

作　　者：宋有硕 马跃 SONG YouShuo;MA Yue(College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械强度》2022年第1期162-168,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51975379);上海市自然科学基金项目(19ZR1435500)资助~。

摘　　要：军用越野车球笼式等速万向节受到的载荷比传统汽车大,且工况恶劣,有可能发生接触磨损,以及大轴间角度下保持架的断裂,因此对恶劣工况下接触应力和保持架强度的研究非常重要。以某典型的军用越野车球笼等速万向节为对象,首先对钢球与内外滚道之间的接触应力进行理论解析和仿真,将仿真和解析结果进行对比,验证仿真模型的正确性;其次,根据万向节关键部位之间的载荷传递关系和物理实验,分析保持架断裂的原因和过程;最后,进行极限轴间角下静扭实验,并对保持架断面进行硬度测试,通过硬度-强度转换关系得到沿厚度的强度分布,结果表明保持架在正常工况下强度满足要求,但是恶劣工况下有可能会破碎。可以为越野车用等速万向节设计及制造提供理论参考。The load of ball cage type constant velocity joint of military off-road vehicle is larger than that of traditional vehicle,and the working condition is bad,which may cause contact wear,as well as the fracture of the cage under the angle between large axes.Therefore,it is very important to study the contact stress and the strength of the cage under the bad working condition.In this paper,a typical military off-road vehicle ball cage constant velocity joint is taken as the object.Firstly,the contact stress between the steel ball and the inside and outside raceway is theoretically analyzed and simulated.The simulation and analytical results are compared to verify the correctness of the simulation model.Secondly,according to the load transfer relationship between the key parts of the universal joint and the physical experiment,the reason and process of cage fracture are analyzed.Finally,the static torsion test under the ultimate axial angle is carried out,and the hardness test is carried out on the section of the cage.The strength distribution along the thickness is obtained through the relationship between hardness and strength conversion.The results show that the strength of the cage meets the requirements under normal working conditions,but may be broken under bad working conditions.This research can provide theoretical reference for the design and manufacture of constant velocity joint for off-road vehicle.

关 键 词：万向节 保持架 接触分析 应力分析 强度 

分 类 号：U463.216.3[机械工程—车辆工程]