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外文文献Beltconveyorisamachineryforconveyinggoodswithoutendconveyerbeltmovingcontinuously.Ithassimplestructure,lowcost,longtransportationdistanceandhighproductivity.Withthedevelopmentofmodernindustrialscienceandtechnology,beltconveyorhasbecomemoreandmoreimportantinindustrialproduction.Withthedevelopmentofbeltjointtechnology,beltconveyorhasdevelopedtoahighlevel.Inthe17thcentury,theprototypeofmodernbuckethoistsandscraperconveyorsbegantouseaerialropewaytotransportloosematerials.Inthemiddleof19thcentury,conveyorsofvariousmodernstructuresappearedoneafteranother.In1868,BeltconveyorappearedinEngland,screwconveyorinAmericain1887,steelbeltconveyorinSwitzerlandin1905,inertialconveyorinEnglandandGermanyin1906.Afterthat,theconveyorreceivesTheimpactoftechnologicalprogressinthemechanicalmanufacturing,electricalmachinery,chemicalandmetallurgicalindustrieshasbeencontinuouslyimproved,graduallyfromthecompletionoftheinternaltransportationoftheworkshoptothecompletionofmaterialhandlingwithintheenterprise,betweenenterprisesandevenbetweencities,Becomeanindispensablepartofmaterialhandlingsystemmechanizationandautomation.1. Beltconveyorhavingacirculatingconveyingbelt,comprising:carryingrollersarrangedbetweenatopstrandandabottomstrandofthecirculatingconveyingbelt;upperandlowerguiderollersactingonupperandlowerbeadsonthecirculatingconveyingbeltandforcingthecirculatingconveyingbeltradiallyoutward,theupperandlowerbeadsbeingformedoppositetoeachotheronthecirculatingconveyingbelt;atleastonetoothedringinteractingwithatleastonetoothedbeltarrangedonthecirculatingconveyingbelt,wherebytheupperbeadisneighboredtothetoothedbelt;andadrivedeviceformovingthecirculatingconveyingbelt.2. Beltconveyoraccordingtoclaim1,whereinthetoothedbeltisarrangedontheundersideofthecirculatingconveyingbelt,intherunningdirectionofthecirculatingconveyingbelt.3. Beltconveyoraccordingtoclaim2,whereinthetoothedringisarrangedattheendofthecarryingrollers,andwhereinprojectingfromtheendofafirstcarryingrollerisajournalfortheconnect...