耳孔拉板是起重机械中的一种主要受力构件,其计算的正确性直接影响着起重机的安全性和经济性。目前起重机械结构的发展趋势,由销轴联接代替精制螺栓联接的部位越来越多,因此正确地计算耳孔拉板的强度也显得更加重要。耳孔拉板孔壁上载荷分布规律的假设与孔壁上实际载荷分布的符合程度和耳环断面上应力分布规律的假定,直接影响耳环断面 Ear hole pull plate is a kind of main force component in the crane, the correctness of the calculation directly affects the safety and economy of the crane. At present, the development trend of lifting machinery structure, the pin shaft coupling instead of refined bolting more and more parts, so the correct calculation of the ear hole pull plate strength is even more important. The assumption of the law of load distribution on the hole wall of ear plate and the actual load distribution on the wall of the hole and the stress distribution on the ear ring cross section directly affect the earring cross section