本科学生毕业设计比亚迪F3R车型变速器设计系部名称：汽车工程系专业班级：学生姓名：指导教师：职称：黑龙江工程学院二○一一年六月TheGraduationDesignforBachelor'sDegreeDesignontransmissionofBYDF3RCandidate：Specialty：Class：Supervisor：HeilongjiangInstituteofTechnology2011-06·Harbin黑龙江工程学院本科生毕业设计PAGEII摘要本文设计研究了三轴式五挡手动变速器。首先，对于变速器的工作原理做了阐述，从传动机构到倒档布置方案都一一做了详细的说明，完成了换挡机构形式和轴承的选择等，特别值得一提的是在倒档的选择和布置上。因为变速箱在低档工作时作用有较大的力，所以一般变速箱的低档都布置靠近轴的后支承处。紧接着对变速器的各挡齿轮和轴做了详细的设计计算，包括了档数、传动比、中心距以及各档齿轮的齿数，并且进行了强度校核，紧接着对一些标准件进行了选型，其中包括同步器、操纵机构、固定件以及密封件等等。最后进行的是齿轮、轴以及轴承的校核，其中齿轮校核包括弯曲强度和接触应力，轴校核包括强度和刚度的计算，轴承校核的则是其寿命计算，并讲述了变速器中各部件材料的选择。关键字：变速器；设计；齿轮；轴；校核ABSTRACTThisdesignofathree-axisfive-speedmanualtransmission.First,theworkingprincipleoftransmissionaredescribedindetail,fromthetransmissiontoreverselayoutprogramsarealldoingadetaileddescription,completetheformandbearingofshiftthechoiceofinstitutionsandsoon,isparticularlyworthmentioningisthereverseoftheontheselectionandarrangement.Becausetheroleoftransmissioninlow-gradework,agreaterforce,itisgenerallylow-gradegearboxarearrangednearthesupportattherearaxle.Theneachblockofthetransmissiongearsandshaftsmadeadetaileddesigncalculations,includingthegears,transmissionratio,centerdistanceandthenumberofteethofthegearprofileandstrengthcheckcarriedout,followedbyanumberofstandardpartswereselectedtype,includingsynchronization,controlmechanism,fixedfittingsandsealsandsoon.Finally,thegear,shaftandbearingchecking,checkinggearwhichincludesbendingstrengthandcontactstress,axialstrengthandrigiditychecking,includingthecalculationofthebearingcheckingisitslifespan,andabouteachtransmissioncomponentmaterialsofchoice..Keywords:Transmission;Design;Gear;Axis;Checking目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc296502055"摘要PAGEREF_Toc296502055\hIHYPERLINK\l"_Toc296502056"ABSTRACTPAGEREF_Toc296502056\hIIHYPERLINK\l"_Toc296502057"第1章绪论PAGEREF_Toc296502057\h1HYPERLINK\l"_Toc296502058"1.1选题的背景PAGEREF_Toc296502058\h1HYPERLINK\l"_Toc