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在用户服务工作中,我们遇到一台东方红-70推土机的主离合器分离杆螺栓多次发生断裂的故障。检查发现螺栓在调整螺母与分离杆螺栓垫圈接触处发生断裂,断口呈疲劳断裂状。检查螺栓材料符合技术要求。进一步观察与螺栓相关的分离杆螺栓垫圈和分离杆球座的工作状态,发现分离杆螺栓垫圈紧紧卡死在分离杆的球座上。从螺栓受力情况分析,当踏下或松开离合器踏板时,分离杆螺栓在分离轴承的作用下,分离杆绕分离杆销摆动,分离杆两端则作圆弧运动,分离杆螺栓在轴向移动的同时还作一定的摆动,为了消除分离杆螺栓在工作中摆动时所受的弯曲
In customer service, we encountered a failure of the main clutch of the Dongfanghong-70 bulldozer. Inspection found that the bolt in the adjustment nut and the separation rod bolt washer fracture occurred fracture fracture was fatigue fracture. Check the bolt material to meet the technical requirements. Further observation of the bolt-related separation of the bolt washer and the separation of the ball seat state, and found that the separation rod bolt washer tightly stuck in the separation of the ball seat. From the analysis of the bolt force situation, when depressing or releasing the clutch pedal, the separation rod bolt under the action of the separation bearing, the separation rod swings around the separation rod pin, and the two ends of the separation rod make an arc movement, To move at the same time make a certain swing, in order to eliminate the bending of the separating rod bolt swinging in the work