推土机后牵引装置结构改进及优化设计  

Structure Improvement and Optimal Design of Bulldozer's Rear-mounted Drawbar

作　　者：辛宇 卢丽娟[2] 

机构地区：[1]陕西中联重科土方机械分公司 [2]陕西服装工程学院

出　　处：《工程机械》2016年第2期23-26,7,共4页Construction Machinery and Equipment

摘　　要：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-mounted drawbar to a bull-dozer is one of important components in the attachment. However, a traditional drawbar frame would adopt open type rib w elding construction for sim ple structure, lower strength, limited exten-sion that would affect operation of the whole machine. A ZD 220 track type bulldozer with its rear-mounted drawbar was adopted as the object to have de-signed a long suspension armed drawbar device in high strength so as to meet special requirements by a customer overseas, which was based on a tradi-tional break-down theory. Therefore, a 3-D model was built up using a Pro/E which was combined with an ANSYS Workbench for simulation and analyses that the drawbar was analyzed in statics and optimized in design during a full slippage of the tracks, before a com-parison was made with between data before and after the test so as to verify feasibility of the technology concept. Results show that the improved drawbar device can upgrade its data value while attaining its target as higher strength and lighter weight. Finally, the connec-tion bolts used there were checked for strength to ensure a safety application.

关 键 词：推土机 后牵引装置 结构优化 

分 类 号：TU623.5[建筑科学—建筑技术科学]