客车提速后 ,由于运行速度普遍提高 ,客车横摆严重 ,垂向振动加剧 ,造成零部件磨损、折断、松动现象频繁发生 ,转向架运行性能恶化。从客车厂修分解转向架后的情况看 ,销、套及定位装置磨损严重 ,构架、摇枕、弹簧支柱、闸瓦托吊及座等零部件裂纹增多 ,对车辆运行安全构成了极? Passenger car speed, due to the general increase in operating speed, bus yaw serious vertical vibration intensified, resulting in parts wear and tear, breakage, loose phenomenon occurs frequently, the bogie operating performance deteriorated. Judging from the situation in the passenger car factory that the bogie was disassembled to the bogie, the sales of pins, sleeves and positioning devices were serious. The cracks in the bogie, bolster, spring support,