摘要
针对现有轮式挖掘机难以在松软地面作业,履带式挖掘机不适宜长距离行驶等问题,研制了一款轮履复合式多功能挖掘机。首先从整体上设计了挖掘机的结构。然后,对轮履复合式多功能挖掘机进行模块化设计,主要包括工作臂、旋转履带、轮履转换装置、平地机、移动支腿。其中利用Motion对工作臂的钻头与挖斗进行动力学分析,分析结果可知,挖斗与钻头运动范围可完成相应的挖掘与凿地作业。利用Simulation对平地机结构、移动支腿进行有限元分析,分析结果可知,其应力强度符合使用要求。并对旋转履带伸缩的长度、移动支腿的连接板长度、轮履转换装置中心液压油缸的高度进行参数化设计。最后搭建轮履复合式多功能挖掘机7%比例模型,进行挖掘机的运动试验。试验结果表明,所设计的轮履复合式多功能挖掘机可有效将轮胎与履带的优点结合,实现更优行驶。轮履复合式多功能挖掘机可有效提高移动、作业效率,研究结果对挖掘机的改进具有重要的参考价值。
Aiming at the problems of existing wheeled excavators that are difficult to operate on soft terrain and that crawler excavators are not suitable for long-distance driving,a multi-functional wheel-track excavator is developed in this work.Firstly,the full-vehicle structure of the excavator is designed.Then,the modular design of the wheeltrack multi-functional excavator is carried out,which mainly includes the working arm,the rotating track,the wheeltrack conversion device,the grader and the moving outrigger.The software Motion is used to analyze the dynamics of the drill and the bucket of the working arm.The results show that the movement range of the bucket and the drill can complete the corresponding excavation and digging operations.Finite element analysis of the grader structure and the moving leg is carried out by software Simulation.The analysis results show that the stress intensity of the grader meets the application requirements.The length of the telescopic rotating track,the length of the connecting plate of the moving leg and the height of the hydraulic cylinder in the center of the wheel-track conversion device are parameterized.Finally,a wheel-track multi-functional excavator scaled model is built as 7%of the original size,and the excavator motion test is carried out.The test results show that the designed excavator can effectively combine the advantages of both tire and track to achieve better driving performance.The wheel-track multi-functional excavator can effectively improve the efficiency of moving and operation,with reference value for the improvement of excavators.
作者
贺业林
郭安福
刘清超
姜涛
徐瑞
张晓雯
HE Yelin;GUO Anfu;LIU Qingchao;JIANG Tao;XU Rui;ZHANG Xiaowen(School of Mechanical and Automotive Engineering,Liaocheng University,Liaocheng Shandong 252059,China)
出处
《机械设计与研究》
CSCD
北大核心
2022年第3期210-215,221,共7页
Machine Design And Research
基金
国家自然科学基金资助项目(51775318)
大学生创新创业训练项目(CXCY2021024)。
关键词
挖掘机
多功能
轮履转换
斜面支撑
结构设计
excavator
multi-function
wheel and track conversion
inclined plane support
the structure design
