15号车钩是目前我国客车的主型车钩。但在客车厂修时发现,随着我国铁路车辆运行速度的不断提高,车钩部位的裂纹明显增多,从而直接危及行车安全,影响旅客运输的正常运行。近期,笔者对沈阳客车厂的22型厂修客车车钩入厂时的状态和裂纹情况进行了记录分析。现将考察情况简述?.. The 15th coupler is the main coupler of our country’s passenger cars. However, when repairing the bus depot, it was found that with the continuous improvement of the running speed of railway vehicles in China, the cracks in the coupler parts obviously increased, which directly jeopardized the traffic safety and affected the normal operation of passenger transport. Recently, I conducted a record analysis of the state and cracks of the passenger car coupler at the factory of Shenyang Passenger Depot in the 22th factory. We will now examine the briefing.