套筒式新型剪叉机构  

Design of new-type telescopic scissors fork mechanism

作　　者：李宇庭[1] 熊彪 冼土濂 孙科[1] 张志富[1] 陈定方[1] 

机构地区：[1]武汉理工大学智能制造与控制研究所,武汉430063 [2]中交武汉港湾工程设计研究院有限公司,武汉430040

出　　处：《起重运输机械》2014年第9期60-65,共6页Hoisting and Conveying Machinery

摘　　要：针对剪叉机构在运动过程中平台受力点随时间变化等特点,提出了一种新型套筒式剪叉机构,以套筒式可伸缩杆为主要承力构件,采用分级顶推的方式上升。对2种机构进行了详细的运动学和力学分析,比较两者的主要性能差异,并通过实例与相关软件仿真验证了分析的正确性。给出了改进机构的优化条件,运用线性加权和法对改进机构做出了相应优化,利用有限元方法对其进行了模态分析,验证了机构的稳定性。In view of the features such as the platform load-bearing points changing over time during the scissors fork mechanism in operation,a new-type telescopic scissors fork mechanism is put forward in the paper.The telescopic expan-sion link rises in a way of grading pushing as the main load-bearing component.Detailed kinematics and mechanical analysis is performed for both mechanisms,to compare major performance differences.The analysis is verified by examples and re-lated software simulation.Furthermore,the paper describes the optimal conditions of improved mechanism,to make corre-sponding optimization for it using the linear weighted sum method,with modal analysis performed using the finite element method,to prove the mechanism stable.

关 键 词：剪叉机构 套筒 分级顶推 线性加权和法 模态分析 

分 类 号：TH211.6[机械工程—机械制造及自动化]