电动凿岩机是一种用于煤矿开采、铁路隧道开挖的新型凿岩工具。它具有携带方便、节约能源和生产效率高等优点,对加速铁路建设和煤矿建设有着重要的现实意义和明显的经济效果。但是,凿岩机的主要运动件——连杆,其大头部位发生过多次断裂,严重地影响了凿岩机的正常工作。为寻求断裂的原因,我们对凿岩机的连杆进行了以下研究工作。一、连杆动载测定要分析连杆断裂原因,从力学角度考虑,首先要模清在实际工况下连杆的承载情况,即在工作时连杆所承受的最大载荷、最 Electric rock drill is a new type of rock drilling tool used in coal mining and railway tunnel excavation. It has the advantages of easy to carry, energy saving and high production efficiency, which has important practical significance and obvious economic effects for accelerating railway construction and coal mine construction. However, the main movement of rock drill - connecting rod, the big part of the occurrence of multiple fractures, seriously affecting the normal operation of the rock drill. In order to find the cause of the fracture, we conducted the following research work on the rod of the rock drill. First, the connecting rod dynamic load test To analyze the causes of connecting rod fracture, from the mechanical point of view, we must first clear the bearing conditions under actual conditions, that is, the maximum load sustained by the connecting rod at work, the most