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1、摘要摘要近年來(lái)，我國(guó)政府繼續(xù)加強(qiáng)玉米收獲機(jī)械化的工作力度，玉米機(jī)收呈現(xiàn)出全面發(fā)展、加速鋪開(kāi)的良好態(tài)勢(shì)。據(jù)統(tǒng)計(jì)，我國(guó)玉米主產(chǎn)區(qū)累計(jì)投入玉米聯(lián)合收獲機(jī)17.8萬(wàn)臺(tái)，機(jī)收面積約1.65億畝，全國(guó)玉米機(jī)收水平超過(guò)33%，以每年超過(guò)7個(gè)百分點(diǎn)的高速增長(zhǎng)，進(jìn)入高速發(fā)展時(shí)期。進(jìn)一步提高玉米收獲機(jī)械生產(chǎn)效率，特別是簡(jiǎn)化玉米收獲機(jī)割臺(tái)的整體結(jié)構(gòu)，減小能耗已成為玉米收獲機(jī)械發(fā)展的當(dāng)務(wù)之急。本課題通過(guò)對(duì)現(xiàn)有玉米收獲機(jī)的分析研究，對(duì)玉米摘穗秸稈切斷單元體結(jié)構(gòu)進(jìn)行了優(yōu)化設(shè)計(jì)，性能可靠，布局進(jìn)一步簡(jiǎn)化，節(jié)省成本和降低能耗。該部分主要包括主變速箱，帶動(dòng)拉莖輥和割刀，通過(guò)對(duì)變速箱的優(yōu)化設(shè)計(jì)
2、使得結(jié)構(gòu)緊湊，減少傳動(dòng)鏈，從而更好的實(shí)現(xiàn)作業(yè)。本設(shè)計(jì)對(duì)近一步降低小型玉米收獲機(jī)的成本，普及玉米機(jī)收具有十分重要的借鑒意義。關(guān)鍵詞：玉米收獲機(jī)割臺(tái)傳動(dòng)變速箱割刀III摘要III摘要IIIAbstractAbstractInrecentyears,ourgovernmenthascontinuedtoincreasecornharvestmechanizationefforts,cornmachineincomeshowinginfullswing,acceleratethedevelopmentofgoodposture.Accordingtostatisti
3、cs,themainmaizeproducingareasinChinainvestedatotalof178,000unitsofcornharvestermachineincomeareaofabout1.65millionacresofNationalCornmachineincomelevelmorethan33%,withtherapidgrowthofover7percentayear,entertheperiodofrapiddevelopment.Furtherimprovethecornharvestingmachineryproducti
4、onefficiency,especiallytosimplifytheoverallstructureofthecornharvestercut,reduceenergyconsumptionhasbecomethetoppriorityofthedevelopmentofcornharvestingmachinery.Thisissuethroughanalysisofexistingcornharvester,twolinesofKnapsackcutharvestingmachinerytransmissionpartsoptimizationdes
5、ign,reliableperformance,andlayouttofurthersimplify,savecostsandreduceenergyconsumption.Partofthetransmissionmaingearbox,drivenpullthestemrollerandreelsprocketaboutcuttinggearbox,makesthecompactthroughthedesignofthegearboxtoreducethetransmissionchain.Designedtofurtherreducecosts,pen
6、etrationofsmallcornharvestercornmachineincomehasaveryimportantreference.Keywords:CornHarvestercuttingtabletransmissiongearboxcuttingknifeIII目錄III目錄III目錄目錄摘要ⅠAbstract（英文摘要）Ⅱ目錄Ⅲ第一章緒論………………………………………………………11.1課程的背景及意義11.2我國(guó)玉米收割機(jī)的發(fā)展歷程及現(xiàn)狀21.3玉米收獲機(jī)械化的發(fā)展趨勢(shì)及意義31.4本課題的主要研究?jī)?nèi)容51.5本章小結(jié)6第二章總體方案設(shè)
7、計(jì)72.1課題的主要參數(shù)及技術(shù)指標(biāo)72.2總體傳動(dòng)方案的確定72.2.1整體方案設(shè)計(jì)72.2.2各部分傳動(dòng)比確定82.2.3各部分結(jié)構(gòu)初選設(shè)計(jì)92.3本章小結(jié)10-第三章各部分轉(zhuǎn)動(dòng)的選擇設(shè)計(jì)計(jì)算113.1錐齒輪參數(shù)設(shè)計(jì)計(jì)算113.1.1主變速箱錐齒輪幾何參數(shù)設(shè)計(jì)計(jì)算113.1.2摘穗輥錐齒輪幾何參數(shù)設(shè)計(jì)計(jì)算123.1.3撥禾鏈傳動(dòng)軸錐齒輪幾何尺寸設(shè)計(jì)計(jì)算133.2鏈輪參數(shù)設(shè)計(jì)計(jì)算153.2.1中間傳動(dòng)鏈輪設(shè)計(jì)計(jì)算153.2.2升運(yùn)器鏈輪設(shè)計(jì)計(jì)算153.3變速箱的設(shè)計(jì)163.4軸的設(shè)計(jì)163.5本章小結(jié)17第四章校核計(jì)算184.1主動(dòng)力箱錐齒輪校核18-4.2
8、割臺(tái)變速箱錐齒輪校核204.3主動(dòng)力箱軸的校核234
