PAGE\*MERGEFORMATV摘要此次设计的小型玉米脱粒机，其工作原理为电动机通过皮带轮传动,玉米棒通过入料斗进入脱粒滚筒，在高速回转的脱粒滚筒的冲击和玉米棒、滚筒、凹板式栅格的作用下被脱粒下来。采用挤搓式的原理使用板齿进行脱粒，板齿呈螺旋均布便于脱粒滚筒。小风扇的作用是将夹在玉米粒中的轻杂带走。与同类产品相比，结构非常紧凑，性能优良，操作十分轻便，安全可靠，而且不占场地，搬运存放十分方便，成本非常低。破碎率很低，可以提高种子发芽率。能大大的减轻农民劳动强度，有利于抢赶农业季节，促进农民发家致富，推动农业的发展，适宜在广大农村推广应用。关键词：玉米；脱粒机；板齿Thedesignofsmallcornthresher,itsworkingprincipleforthemotorthroughthepulleydrive,corncobthroughintothehopperintothecylinder,andtheimpactofthehigh-speedrotarycylindercorncob,roller,concaveplateundertheactionofgridbythreshing.Thecrowdedrubboardtoothprincipleusedforthreshing,toothaspiralplateuniformeasythreshingcylinder.Istheroleofsmallfancliplightimpurityinthecornkernels.Comparedwithsimilarproducts,thestructureisverycompact,highperformance,operationisveryportable,safeandreliable,anddonottakeasite,handlingstorageisveryconvenient,costisverylow.Breakagerateisverylow,canimprovetheseedgerminationrate.Cangreatlyreducelaborintensityoffarmers,isconducivetorobfarmingseason,promotethefarmersgetrich,promotethedevelopmentofagriculture,suitableforapplicationinthecountryside.Keywords:Corns；Shellersmachine；Plank-tooth目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc388164603"摘要PAGEREF_Toc388164603\hIHYPERLINK\l"_Toc388164604"前言PAGEREF_Toc388164604\hIVHYPERLINK\l"_Toc388164605"1引言PAGEREF_Toc388164605\h-1-HYPERLINK\l"_Toc388164606"1.1毕业设计课题的任务和要求PAGEREF_Toc388164606\h-1-HYPERLINK\l"_Toc388164607"1.2课题的主要内容PAGEREF_Toc388164607\h-1-HYPERLINK\l"_Toc388164608"2小型玉米脱粒机的设计PAGEREF_Toc388164608\h-2-HYPERLINK\l"_Toc388164609"2.1脱粒机构PAGEREF_Toc388164609\h-3-HYPERLINK\l"_Toc388164610"2.2筛选机构PAGEREF_Toc388164610\h-6-HYPERLINK\l"_Toc388164611"2.3清选机构PAGEREF_Toc388164611\h-7-HYPERLINK\l"_Toc388164612"2.4机架PAGEREF_Toc388164612\h-8-HYPERLINK\l"_Toc388164613"3玉米脱粒机的设计计算PAGEREF_Toc388164613\h-8-HYPERLINK\l"_Toc388164614"3.1电动机的选择PAGEREF_Toc388164614\h-8-HYPERLINK\l"_Toc388164615"3.2V带传动的计算PAGEREF_Toc388164