脚踏式玉米脱粒机摘要本次设计玉米脱粒机工作原理就是利用板齿和脱粒辅助轴之间的相互挤搓实现脱粒，板齿安装在滚筒上，滚筒的主轴通过曲柄连杆机构和脚踏板相连。脱粒辅助轴是用于抵住玉米棒，并利于玉米棒在板齿和辅助轴之间滚动和滑动，从而实现脱粒。本设计重点是曲柄连杆机构的设计，以达到最优工况；滚筒、主轴、板齿和脱粒辅助轴的设计，还有排芯区和喂料装置——漏斗的设计。设计各项参数达到预期目标，脱净率高、破碎率低、经济性好，尤其适合南方小面积种植农户使用。对减轻劳动强度，提高生产效率，减轻农民负担，增加收入有很大的意义。关键词：脱粒机脱粒滚筒脱粒辅助轴漏斗abstractDesignmaizeshelleroperationprincipletoutilizeboardtoothandthresh,assisttocrowdtorubwiththehandsandrealizethreshingeachotheraxlethistime,theboardtoothisinstalledonthecylinder,themainshaftofthecylinderlinksupwiththerunning-boardthroughthecrankconnectingrodorganization.Thresh,assistaxleusedfor,support,liveinmaizetobeexcellent,benefitmaizetobeexcellentinboardtoothassistingaxlerollandslip,thusrealizethreshing.Thisdesignfocusisthedesignofacrankconnectingrodorganization,inordertoreachtheoptimumoperatingmode;Cylinder,mainshaft,boardtoothandthreshingtoassistthedesignoftheaxle,stillarrangethecoredistrictandfeedthematerialdevice--Designofthefunnel.Designeveryparameterreachre-settarget,takeoffnetratehigh,brokenratelow,economyisfine,especiallysuitableforthelittleareaintheSouthandplantpeasanthouseholdstouse.Tolighteninglabourintensity,improveproductionefficiency,lightenpeasant'sburden,increaseincomesandhaveverygreatmeanings.Keywords:ShellerCylinderthreshingExtractsseedstheauxiliaryaxisFunnel目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc230347322"引言PAGEREF_Toc230347322\h2HYPERLINK\l"_Toc230347323"一.玉米脱粒机的工作原理PAGEREF_Toc230347323\h4HYPERLINK\l"_Toc230347324"二.玉米脱粒机驱动机构的型式与最优工况的选择PAGEREF_Toc230347324\h5HYPERLINK\l"_Toc230347325"2．1驱动机构的作用与型式PAGEREF_Toc230347325\h5HYPERLINK\l"_Toc230347326"2．2驱动机构最优工况及曲柄最佳位值的选择PAGEREF_Toc230347326\h8HYPERLINK\l"_Toc230347327"三.玉米脱粒机驱动机构设计技术要求PAGEREF_Toc230347327\h8HYPERLINK\l"_Toc230347328"3．1驱动机构各构件的相对位置必须满足省力的要求PAGEREF_Toc230347328\h8HYPERLINK\l"_Toc230347329"3．2踏板行程S和摆角φ的设计要求PAGEREF_Toc230347329\h8HYPERLINK\l"_Toc230347330"3．3行程速比系数K和极位夹角θPAGEREF_Toc230347330\h9HYPERL