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1:ComputerAidedDesignofOvalGearofSeparatingplantingMechanismwithPlanetaryGearsofNon-eccentricity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2：KinematicsmodelingandanalysisoftransplantingmechanismwithplanetaryellipticgearsforpotseedlingtransplanterComputerAidedDesignofOvalGearofSeparatingplantingMechanismwithPlanetaryGearsofNon-eccentricityAbstract：SeparatingPlantingMechanismwithPlanetaryGearsofNon-EccentricityisanewtypemechanismThemechanismisconstitutedbythreepartstheyareovalgeartransmissiondivision，planetarygeartransmissiondivisionandplantthearmBasicthoughtofdesigningisadoptingovalgeartransmission，choicethefitconstructionparametertoensureAsymmetrytransmissionratioandscrewtheanglerelationoftherequestoftransplantriceseedlingThethesiswillexpatiatehowtocomputergeometricparemeterofovalgear，analysistransmissioncharacterofovalgear，andensuretransmissionratioandAngleofpressureintheperiodofEngagementofovalgear.Keywords：agriculturalengineering；separating-plantingmechanismwithplanetarygearsofnon-eccentricity；design；ovalgear；computeraideddesign1.TransplantingMechanismwithPlanetaryGearsworksAsshowninFigure1,thediagramofThePlanetaryGearsricetransplantertransplantingmechanismmakeupwithfourcongruenttheZhengyuangearand3congruentovalgear.3rotationcenteroftheovalgearareinthefocusoftheovalear,Theyhavesameinitialphase.Thecenterovalgear(3)(alsocalledsunwheel)fixed.Gearbox(equivalentcarrier)isdrivedbythecentralaxis,theequivalentofaprimemoverpiecesrotatearoundtherotationcenter0ofthesunwheel.Sincethetwoovalgears(3)and(4)engagesthatcausedthechangeofthetransmissionratio,sothetwoplanetscirclegearthatsymmetricalarrangementareswingingbackandforth,seedlingclawmoveattherequiredposture(Angulardisplacementandtrajectory).Thebasicideaofthedesignisusethenon-uniformdriveofovalgearpairandselecttheappropriatestructuralparameterstofindtheworktrajectory,thetakeseedlingsangleandtheplantinganglethatmeetplantingrequirements.1.Planetarycirculargear2.Intermediatecirculargear3Centralovalgear4.Intermediateovalgear5.SeedlingneedleFigure1aschematicdiagramofplanetarygearsTransplantingMechanism2.OvalgearrotationrelationshipFigures2and3asapairofcongruentovalgearmeshingrelationshipdiagramFigure2istheinitialpositionoftheellipticalgeardrivecapstandouniformmotion,whentheonepairofcongruentovalgear,therotationalspeedofthewheelfrommovingperiodicallychanges.Thus,thegeometriccharacteristicsoftheovalgearonlywitheccentricityandfixedaxisrotationrelationshipofthegeartrainandapairoflargereccentricitytheovalgearVicecornerrelationsarequite.Therefore,appropriatelychangingtheeccentricityoftheellipticalgearscanmeettherequirementsoftransplantingangularrelationship.EllipticalgeardrivetransmissionnaturehaslaidatheoreticalfoundationforthisarticleTransplantingMechanismovalgeardesignofplanetarygears.Figure2startingpositionFigure3rotatedposition3.Ovalgeardesign3.1OvalgearpitchcurvearclengthcalculationTheoriginofthepolarcoordinateistakenattheovallowerfocus0,tothegeometriccenteroftheellipseO¢,asthecoordinateoriginforaCartesiancoordinatesystemOxyaxisintheminoraxisdirection,Yaxisinthelongaxis.ThatO¢center,themajoraxisoftheellipseradiusfortwocirclesradiusaandminorradiusb.Figure4showsthetodiameterO¢iandthex-axisisy,itistheintersectionofthesetwocircles,respectivelybyi,iandjforthelineparalleltothexaxis,asalineparalleltotheyaxisbyjthetwolinesintersectatM(x,y)basedontheellipticalnatureofthepointMisapointontheellipse.Termsofyanglevariationofparameters,theparametricequationoftheellipse.Figure4ovalgearpitchcurvearclength