摘要在我国,车载起重机的发展已有五十年的历史了,由于受到客观条件的限制,一度发展较慢。进入九十年代发展迅速,但与国际先进水平还相差很远,主要表现在产品质量的稳定性、自动化、智能化等方面。随着国家基础建设的规模不断加大,许多生产场合都需要对设备、产品、零件、货物等进行搬运和位移,车载起重机在起重运输行业和野外作业发挥的作用也将越来越大,市场也将越来越大。本文对车载起重机的设计进行了研究,分章、节逐一论述了设计过程。在设计过程部分,首先对装载起重机的汽车的底盘进行选择,确定起重机的技术参数,重点就车载起重机的液压系统进行论述和设计,以及对起重机的主要机构如起升机构、回转机构的型式和计算方法做出论述,对回转机构机械装配部分也进行了设计,最后对影响起重机起重能力的支腿型式及其跨距的确定进行了简要说明。设计的汽车起重机能够满足使用功能要求,安全可靠,结构合理,重量轻,操作使用方便,对许多生产场合与起重运输等行业,具有很强的现实意义。关键词:车载起重机液压系统回转机构液压缸ABSTRACTThedesignandproductionofthevehicle-mountedcranehavemorethan50year’shistoryinourcountry.Thedevelopmentofvehicle-mountedcrane,however,wasslowasthewellknownreason.Since1990’s,itwasacceleratedinourcountry,buttheproductsstillcouldnotreachtheadvancedinternationallevelinthequalitystability,automation,andintelligent.Withtheneedvehicle-mountedcranetomoveandshiftproductionequipment,products,componentsandgoods,etc.Vehicle-mountedcraneinliftingthetransportindustryandtheroleoffieldoperationswillbeincreasing,andthemarketwillbegrowing,too.Inthispaper,thedesignoftruckcraneisstudiedindetailandsub-chapter,eachsectionisdiscussedinthedesignprocess.Choosingthevehiclechassiswhichloadingthecranesisdescribedatfirst.Nextistoidentifytechnicalparametersofcrane.Andthedesignofthevehiclewiththeliquidpresssystemisthekey.Thedesignmethodofmainmechanismsofthecrane,whichincludesthewinchsectionandtherotarybearingsection,isdescribed.Mechanicalassemblydesignoftherotarymechanismisalsoconducted.Atlastthispapergivesabriefdescriptionofthesupportleg,whichaffectstheperformanceofcranegreatly.Thisvehicle-mountedcranecansatisfytheserequests,safetydependable,constructionreasonable,thelightweightandoperatingconvenient.Itgivesalotofusestomanyoccasionsandliftproductionoftransportindustries,whichwillhavegreatapplicationbackground.KEYWORDS:Vehicle-mountedcrane,Liquidpresssystem,Rotarymechanism目录摘要……………………………………………………….......ⅠABSTRACT……………………………………………………….......Ⅱ前言…………………………………………………...……………………11.概述………………………………………………………………21.1关于起重机……………………………………….….21.2液压传动应用于汽车起重机上的优缺点..............31.2.1优点........................................................................31.2.2缺点........................................................................31.3液压传动的工作原理及组成......................................41.4汽车起重机液压系统的运用现状和发展趋势............52.液压系统特点分析.................................................72.1起升机构液压回路..................................................72.2伸缩臂液压机构回路…………………………………72.3变幅机构液压回路..................................................93.液压传动系统的故障分析与排故…………………………..103.1液压系统的主要故障…………………………………103.2故障检查……………………………………………….103.3液压系统的故障预防...................................