为了提高偏心伸缩杆式输送装置的输送效率,以4FZ-2000A自走式秸秆收获压捆机上的偏心伸缩杆式机构为研究对象,分析了其输送性能及影响因素,得出伸缩杆回转中心在第四象限时满足输送要求,并根据实际需求对伸缩杆进行了配置,建立了1个输送周期内输送量的数学模型,确定了影响输送量的参数.以各参数为设计变量,以1个输送周期内输送量最大为目标函数,采用虚拟样机技术对其进行结构优化设计.研究结果表明:当伸缩杆轴支架长度e=54.2 mm,伸缩杆长度L=190 mm,伸缩杆轴支架与铅锤方向夹角 α=10°,安装高度H=234 mm时,1个输送周期内的最大输送量为0.79 kg,较优化前提高了36.9％.该研究为进一步研究装置的动力学特性奠定了基础,且为偏心伸缩杆式输送装置的实际设计及生产提供了理论依据.%In order to improve the transport efficiency of the eccentric retractable finger type con-veyor , the retractable finger type mechanism of 4FZ-2000A self-propelled straw bundling machine was studied .The transport performance and its influencing factors of the device were an-alyzed .It was determined that the retractable finger rotary center met the conveying requirements in the fourth quadrant ,and the retractable finger was collocated based on the actual demand .On this basis ,a mathematical model for the transport capacity in a single transport cycle was estab -lished ,and the parameters of affecting transport capacity were determined .The structure was de-signed and optimized by using the virtual prototype technology which took the structural parame-ters of the device as design variables and the maximum transport capacity in a single transport cy -cle as the objective function .The results showed that when the retractable finger shaft bracket length was 54 .2 mm ,the length of the telescopic link was 190 mm ,the angle between retractable finger shaft bracket and vertical direction was 10° and the installation height was 234 mm ,the maximum transport capacity was 0 .79 kg ,which was 36 .9％ higher than that before optimization . The research will lay a foundation for further study of the dynamics peculiarity of the device ,and provide the theoretical basis for the actual design and production of retractable finger type conveyors .
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