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1、AbstractAsoneofChina'sthreemajorcottonproductareas,XinjianghasbecomeChina'slargestnationalcommoditycottonbaseandmostimportantlyqualitycottonproducingareas.However,duetocostreasons,cottonbollsfailedtoopenmostlyabandoned,especiallythecottonbollswhicharemechanizedharvesteddiscardedwasteisveryser
2、ious.Thispaperanalyzesthecaseofthecottonbollharvestmachineryathomeandabroad.Bylearningtheforeignmaturemechanicalharvestingexperience,consideringthecharacteristicsofcottoncroppingpatternsinXinjiang,designedbombtoothtypecottonbollspickingdevice,andpickingdevicekinematicsanddynamicssimulationana
3、lysis.Bythepickingtest,theoptimalcombinationofstructuralparametersandmotionparametersofthepickingdevicearegot.Themaincontentsareasfollows:(1)Thephysicalandmechanicalpropertiesofbollsweremeasured.Fieldmeasurementsofcottonbollscroppingpatternandshape,diameter,quality,moisturecontentandotherchar
4、acteristics;measuredtheconnectingforcebetweenbollstalkandstalksandconnectingforcebetweenbollandstalkbyelectronicuniversaltestingmachine;measuredrestitutioncoefficientbollsstaticcoefficientoffriction,rollingfrictioncoefficient,bollselasticmodulusbytest.(2)bollspickingdeviceforthestateandnon-wo
5、rkingstatestressanalysiscarriedoutinbothcases,thesimulationanalysislaterpickingdeviceprovidesmechanicalbasis;measurementdataobtainedinaccordancewithChapterIIofthekeycomponentssuchaspickingequipmentrack,roller,spring-tooth,bridge,hydrauliccylinders,transmissionstructuraldesign.(3)Springtoothsa
6、ndcottonbolls’pickingcollisioncoursearesimulatedbyAdamskinematicssimulationsoftware,theimpactforceandconnectingforcebetweenbollsandstalkincreasewiththedrumspeedincreases,thereasonablespeedofrollerisfrom150r/minto230r/min.Getthemaximumstressis52.11MPaandthemaximumdisplacementis0.998mmunderthec
7、onditionofbendingbyfiniteelementanalysissoftwareANSYS,themaximumstressis102.5MPaandthemaximumdisplacementis3.14mmundertheconditionoflimitreverse,thedesignrequirementsaremet.themaximumstressis105MPaandthemaximumdisplacementis1.58mmofspringtoot
