外文翻译--正齿行星轮分插机构椭圆齿轮的计算机辅助设计.doc

外文翻译毕业设计题目椭圆齿轮行星系大株距植苗机构的设计原文1正齿行星轮分插机构椭圆齿轮的计算机辅助设计译文1ComputerAidedDesignofOvalGearofSeparatingplantingMechanismwithPlanetaryGearsofNoneccentricity原文2钵苗移栽机椭圆齿轮行星系植苗机构运动学建模与分析译文2KinematicsmodelingandanalysisoftransplantingmechanismwithplanetaryellipticgearsforpotseedlingtransplanterComputerAidedDesignofOvalGearofSeparatingplantingMechanismwithPlanetaryGearsofNoneccentricityAbstractSeparatingPlantingMechanismwithPlanetaryGearsofNonEccentricityisanewtypemechanism．Themechanismisconstitutedbythreepartstheyareovalgeartransmissiondivision，planetarygeartransmissiondivisionandplantthearm．Basicthoughtofdesigningisadoptingovalgeartransmission，choicethefitconstructionparametertoensureAsymmetrytransmissionratioandscrewtheanglerelationoftherequestoftransplantriceseedling．Thethesiswillexpatiatehowtocomputergeometricparemeterofovalgear，analysistransmissioncharacterofovalgear，andensuretransmissionratioandAngleofpressureintheperiodofEngagementofovalgear.Keywordsagriculturalengineeringseparatingplantingmechanismwithplanetarygearsofnoneccentricitydesignovalgearcomputeraideddesign1.TransplantingMechanismwithPlanetaryGearsworksAsshowninFigure1,thediagramofThePlanetaryGearsricetransplantertransplantingmechanismmakeupwithfourcongruenttheZhengyuangearand3congruentovalgear.3rotationcenteroftheovalgearareinthefocusoftheovalear,Theyhavesameinitialphase.Thecenterovalgear3alsocalledsunwheelfixed.Gearboxequivalentcarrierisdrivedbythecentralaxis,theequivalentofaprimemoverpiecesrotatearoundtherotationcenter0ofthesunwheel.Sincethetwoovalgears3and4engagesthatcausedthechangeofthetransmissionratio,sothetwoplanetscirclegearthatsymmetricalarrangementareswingingbackandforth,seedlingclawmoveattherequiredpostureAngulardisplacementandtrajectory.Thebasicideaofthedesignisusethenonuniformdriveofovalgearpairandselecttheappropriatestructuralparameterstofindtheworktrajectory,thetakeseedlingsangleandtheplantinganglethatmeetplantingrequirements.1.Planetarycirculargear2.Intermediatecirculargear3Centralovalgear4.Intermediateovalgear5.SeedlingneedleFigure1aschematicdiagramofplanetarygearsTransplantingMechanism2.OvalgearrotationrelationshipFigures2and3asapairofcongruentovalgearmeshingrelationshipdiagramFigure2istheinitialpositionoftheellipticalgeardrivecapstandouniformmotion,whentheonepairofcongruentovalgear,therotationalspeedofthewheelfrommovingperiodicallychanges.Thus,thegeometriccharacteristicsoftheovalgearonlywitheccentricityandfixedaxisrotationrelationshipofthegeartrainandapairoflargereccentricitytheovalgearVicecornerrelationsarequite.Therefore,appropriatelychangingtheeccentricityoftheellipticalgearscanmeettherequirementsoftransplantingangularrelationship.EllipticalgeardrivetransmissionnaturehaslaidatheoreticalfoundationforthisarticleTransplantingMechanismovalgeardesignofplanetarygears.Figure2startingpositionFigure3rotatedposition3.Ovalgeardesign3.1OvalgearpitchcurvearclengthcalculationTheoriginofthepolarcoordinateistakenattheovallowerfocus0,tothegeometriccenteroftheellipseO¢,asthecoordinateoriginforaCartesiancoordinatesystemOxyaxisintheminoraxisdirection,Yaxisinthelongaxis.ThatO¢center,themajoraxisoftheellipseradiusfortwocirclesradiusaandminorradiusb.Figure4showsthetodiameterO¢iandthexaxisisy,itistheintersectionofthesetwocircles,respectivelybyi,iandjforthelineparalleltothexaxis,asalineparalleltotheyaxisbyjthetwolinesintersectatMx,ybasedontheellipticalnatureofthepointMisapointontheellipse.Termsofyanglevariationofparameters,theparametricequationoftheellipse.Figure4ovalgearpitchcurvearclength