摘要起重机械用来对物料作起重、运输、装卸和安装等作业的机械设备，它可以减轻体力劳动、提高劳动生产率和在生产过程中进行某些特殊的工艺操作，实现机械化和自动化。本设计通过对桥式起重机的大车运行机构部分和回转小车运行机构的总体设计计算，以及电动机、联轴器、缓冲器、制动器的选用；运行机构减速器的设计计算和零件的校核计算及结构设计，完成了桥式起重机的大车运行机构和回转小车运行机构机械部分的设计。通过本次设计，完成了一台15+15t起重量、桥跨度为22.5米的设计要求，并且整个传动过程比较平稳，且大车运行机构和回转小车运行机构结构简单，拆装方便，维修容易，价格低廉。关键词：桥式起重机；大车运行机构；回转小车运行机构；减速器ABSTRACTCraneisakindofmechanicalequipmentsusedforlifting,moving,loading/unloading,andinstalling.Itcanlowerthemanualworkloadandupgradeproductivity.Itcanbeoperatedinsomespecialenvironment,too,andworkwithhighautomaticlevel.Cranecanoperatewholeobjects,disintegratedmaterials,orliquidsubstances.Thecraneloadsvaryfromtimetotime,soitisaperiodicoperationalmachine.Acranecontainsthreemajorparts,mechaniccomponents,ametalstructure,andelectricaldevices.Acrane’smechanicalmovementsaremulti-actions,suchasraising,running,androtating.ThispaperismaindealwithmechanicaldesignforthemovingmainframeofbridgecraneandRotatingFrameofBridgeCrane,includingalldesigncalculationselectionofelectricalmotors,clutch,buffer,andbrakes,thedesignandcalculationofthereducer,calibrationandverificationofthecalculationfortheparts,andstructuredesigns.Throughaseriesofwork,thedesignissatisfiedwiththefunctionalrequirments,15+15tonliftingpowerand22.5metrebridgespan.Thecourseofdriveisquitesmooth.Themechanicalstructureofthemainframeissimple,easytoinstall/disassemble,andmaintain.Andithaslowcost.Keywords:Bridgecrane;Themovingmainframe;Therotatingframe;Thereducer目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc11506970"1绪论PAGEREF_Toc11506970\h1HYPERLINK\l"_Toc11506971"1.1起重机的基本组成PAGEREF_Toc11506971\h1HYPERLINK\l"_Toc11506972"1.2起重机运行机构的基本构造及其特点PAGEREF_Toc11506972\h1HYPERLINK\l"_Toc11506973"1.3起重机运行机构的驱动方式PAGEREF_Toc11506973\h2HYPERLINK\l"_Toc11506974"1.4起重机设计参数PAGEREF_Toc11506974\h5HYPERLINK\l"_Toc11506975"2大车运行机构计算PAGEREF_Toc11506975\h5HYPERLINK\l"_Toc11506976"2.1确定传动方案PAGEREF_Toc11506976\h5HYPERLINK\l"_Toc11506977"2.2选择车轮与轨道并验算其强度PAGER