手扶拖拉机牵引框上的插销孔磨损后,会使扶手架上下晃动幅度增大。随着磨损量的不断增加,手扶拖拉机运输作业时,就会使转向手柄与拖斗脚踏板之间的距离越来越小。当该距离小于50厘米后,不但操作费力,而且稍有疏忽还会使机手的膝盖撞着转向手柄,导致手扶拖拉机突然转向,酿成重大事故。我们采用镶套法修复磨损后的手扶拖拉机牵引框插销孔,效果甚好。具体修复方法是:1.找204旧轴承内圈两个作为镶套,或用中碳钢车制后热处理加工两个镶套。 When the pin hole on the tractor traction frame is worn, the upper and lower rocking of the handrail will increase. As the amount of wear continues to increase, the distance between the steering handle and the trampoline pedals becomes smaller as the tractor moves. When the distance is less than 50 cm, not only the operation is laborious but also a slight negligence will cause the driver’s knee to hit the steering handle, causing the walking tractor to suddenly turn to cause a serious accident. We use set method to repair worn tractor traction frame pin hole, the effect is very good. Specific repair methods are: 1. Find 204 old bearing inner ring as two sets, or carbon steel car heat treatment process after two sets.