本文通过多起重特大道路交通事故成因分析以及事故车辆检验鉴定,从中得到警示:汽车转向器上存在的故障隐患若不通过解体检查难以被及时发现;并根据零件磨损规律,提出中型汽车在使用两年之后应每年结合二级维护对转向器进行一次周期性拆检.实践证明这是一种行之有效的安全预防措施. In this paper, through the analysis of the cause of traffic accidents caused by heavy lifting on extra-large roads and the inspection and appraisal of accident vehicles, we get the warning that the potential hidden faults on the vehicle steering gear can not be found in time if they are not disintegrated, and the medium- After two years, the diverter should be disassembled once a year in combination with the second-level maintenance. Practice has proved that this is an effective safety precaution.