本科毕业设计题目：32/5t通用桥式起重机小车设计学院:机械自动化学院专业:机械工程及自动化学号:学生姓名:指导教师:日期:二○一二年六月摘要本文主要介绍了桥式起重机的整体设计理论和设计过程，其中重点设计了桥式起重机的运行机构起升机构等，主要包括桥式起重机小车运行机构的整体设计及传动机构的布置，小车运行机构计算。还有轴承的选择、联轴器的选择、电动机的选择、减速器的选择和校核。桥式起重机是桥架型起重机的一种，它依靠起升机构和在水平面内的两个相互垂直方向移动的运行机构，能在矩形场地及其上空作业，是工矿企业广泛使用的一种起重运输机械。它具有承载能力大，工作可靠性高，制造工艺相对简单等优点。起升机构包括电动机、制动器、减速器、卷筒和滑轮组。电动机通过减速器，带动卷筒转动，使钢丝绳绕上卷筒或从卷筒放下，以升降重物。小车架是支托和安装起升机构和小车运行机构等部件的机架，通常为焊接结构。起重机运行机构的驱动方式可分为两大类：一类为集中驱动，即用一台电动机带动长传动轴驱动两边的主动车轮；另一类为分别驱动、即两边的主动车轮各用一台电动机驱动。中、小型桥式起重机较多采用制动器、减速器和电动机组合成一体的“三合一”驱动方式，大起重量的普通桥式起重机为便于安装和调整，驱动装置常采用万向联轴器。关键词：桥式起重机；起升机构；运行机构；起重运输机械。AbstractThisarticlemainlyintroducedtheentiredesigntheoryanddesignprocessofbridge.typehoistcrane，whichfocusedonthedesignofthebridgecraneoperationofinstitutionsandhoistingmechanism．Theoveralldesignthatmainlyincludesthebridgetypederricksmallcartocirculateorganizationandspreadthedecorationthatthemotivereaches,thesmallcarcirculatesanorganizationcalculation.Stillhavethechoiceofthechoice,electricmotorofthechoice,alliedstalkmachineofbearings,deceleratemachineofchoiceandpitintheschool.Thebridgecraneisabridge.typecrane,itreliesontheliftingmechanismandinthehorizontalplane,twomutuallyperpendiculardirectionoftheruninstitutions,intherectangularspaceoverthejob,theindustrialandminingenterpriseswidelyusedasastartingheavytransportmachinery.Ithasalargecarryingcapacity,highreliability,work,andmanufacturingprocessisrelativelysimple..Liftingbodies,includingthemotor,brake,reducer,drumandpulley.Reducer,themotordrivenreelrotation,sothatthewireropewoundonareelorrolldown,liftingheavyobjects.Thesmallframerack,supportcareandinstallationfromthewinchandtrolleyruninstitutions,andotherpartsusuallyweldedstructures..Cranesrunthedrivecanbedividedintotwocategories:acentralizeddrive,whichusesanelectricmotortodrivethelongdriveshaftdriveonbothsidesofActiveWheel;otheras,respectively,drivenbothsidesoftheactivewheelseachwithamotordrives.Smallbridgecraneinmorefrequentuseofbrakes,gearunitsandmotorscombi