变铰点与定铰点剪叉机构的力学计算研究及对比分析  

Mechanics Calculation and Comparison Analysis between Scissor Mechanism with Variable and Fixed Hinge Points

作　　者：王翠英[1] 周忠尚[1] 庞茂星 

机构地区：[1]徐工集团江苏徐州工程机械研究院

出　　处：《工程机械》2016年第4期42-48,8,共7页Construction Machinery and Equipment

摘　　要：以剪叉式高空作业平台的剪叉伸展机构为研究对象,对定铰点、变铰点设计下的剪叉液压缸力、铰点力进行理论计算研究,并应用Ma tla b进行对比计算分析。对比分析得出:根据不同工况,选择合适的变铰点与定铰点,设计定铰点初始起升最优位置,可有效减小液压缸推力、铰点力,优化整个起升过程的液压缸力,使液压系统与剪叉结构设计达到最优,从而保证整个剪叉机构的最经济、最优化设计。A scissor type hi-lift platform is set as an object for discussion and theoretical computations are underway for the hinge points so designed,both fixed and variable,plus force at the scissors' cylinder and at the scissors themselves while utilizing a Matlab to make comparative calculations,through which comes out that it has to see various working conditions,select suitable variable and fixed hinge points so as to design a optimal position for initial lift of the fixed hinge point which can minimize effectively the cylinder throughst And force at the hinge point so as to optimize the cylinder force during the entire lift process,and optimize design of the hydraulic system together with the scissor assembly,thus ensuring an optimal design for best economy and best optimization of a scissor type hi-lift platform as a whole.

关 键 词：剪叉伸展机构 液压缸力 铰点力 MATLAB 

分 类 号：TH211.6[机械工程—机械制造及自动化]