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后牵引装置是推土机的重要工作装置之一,传统后牵引装置的牵引架采用开放式板焊加立筋结构,结构简单,强度较低,悬伸长度有限,影响整机的工作性能。选择ZD220型履带式推土机的后牵引装置为研究对象,结合海外客户特殊需求,设计了一种长悬臂箱形高强度后牵引装置,并以传统解析法为理论依据,利用Pro/E建立其三维模型,结合ANSYS Workbench仿真分析,在履带趋于完全打滑状态的工况下,对其进行静力学分析及优化设计。以优化前后的相关数据对比为依据,验证技术方案的可行性。结果表明,优化改进后的后牵引装置结构在性能参数提升的同时实现了高强度、轻量化的优化目标。对牵引架连接用螺栓进行强度校核,验证后牵引装置的使用安全性。
The rear towing device is one of the important working devices of the bulldozer. The tractor of the traditional rear towing device adopts an open plank welded and upright bar structure, which has the advantages of simple structure, low strength and limited overhanging length, which affects the working performance of the whole machine. After selecting the rear towing device of ZD220 crawler bulldozer as research object and combining with the special needs of overseas customers, a long cantilever box high strength rear towing device was designed. Based on the traditional analytical method, Pro / E was used to establish its three-dimensional Model, combined with ANSYS Workbench simulation analysis, static analysis and optimization design of the track in the condition of complete slippery track condition. Based on the comparison of relevant data before and after optimization, the feasibility of the technical solution was verified. The results show that the optimized and improved rear traction structure achieves the goal of high strength and light weight while improving the performance parameters. The traction frame connected to the bolt strength check to verify the safety of the traction device.