基于驱动轴锁紧力分析解决某SUV轮毂断裂问题  

Solving the Problem of a SUV Hub Fracture Based on the Analysis of the Locking Force of the Drive Shaft

作　　者：朱亚伟 孟令云 黄巨成 任思路 ZHU Yawei;MENG Lingyun;HUANG Jucheng;REN Silu(Chery Commercial Vehicle(Anhui)Company Limited,Wuhu 241000,China)

机构地区：[1]奇瑞商用车(安徽)有限公司,安徽芜湖241000

出　　处：《汽车实用技术》2022年第12期89-93,共5页Automobile Applied Technology

摘　　要：为解决某款运动型多用途汽车车型制动器在路试试验过程中,出现的前盘式制动器轮毂断裂问题,对故障件进行轮毂断口电静扫描检测、材料化学成分、金相组织、动态模拟装车状态力矩加载、轴承锁紧力台架试验等,结果表明,实车驱动轴实际提供的轴承锁紧力达不到轴承理论计算需求的锁紧力。在进行路试及操稳试验等过程中,轮胎在整车Y方向微观呈外八字,车轮作为着力点,轴承对轮毂配合端面形成挤压。随着车轮的旋转逐渐形成台阶,轮毂形成疲劳断裂。通过对轴承锁紧力矩进行优化,改善轴承轴向锁紧力,该车型轮毂断裂现象得到很好控制,达到了设计要求。In order to solve the problem of the front disc brake hub fracture during the road test test in the development process of the brake of a certain SUV model,the authors carried out the wheel hub fracture electrostatic scanning detection,material chemical composition,metallographic structure,dynamic the simulated loading state moment loading,bearing locking force bench test,etc..The results show that the bearing locking force actually provided by the actual vehicle drive shaft cannot reach the locking force required by the theoretical calculation of the bearing.In the process of road test and handling stability test,the tire is microscopically eight-shaped in the Y direction of the whole vehicle.The wheel acts as the focal point,and the bearing squeezes the matching end face of the wheel hub.With the rotation of the wheel,a step is gradually formed,and the wheel hub is fatigued fracture.By optimizing the bearing locking torque and improving the bearing axial locking force,the wheel hub fracture of this model is well controlled and meets the design requirements.

关 键 词：盘式制动器 轮毂断裂 锁紧力矩 驱动轴 SUV 

分 类 号：U463.51[机械工程—车辆工程]