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中国农业大学学士学位论文摘要I摘要日益严重的环境污染和能源危机对汽车工业的发展提出了极为严峻的挑战。为了汽车工业的可持续发展，以使用电能的电动机作为驱动设备的电动汽车能真正实现“零污染”，现已成为各国汽车研发的一个重点。在电动汽车研发的众多技术选型之中，依靠轮边驱动的电动汽车逐渐成为一种新颖的电动汽车选型方向。为了弥补现有轮边驱动电动车辆驱动系统的缺陷，本文设计了一种新型双电机二级减速独立驱动桥。该方案采用磷酸铁锂动力电池作为动力源，两台永磁同步电机作为驱动装置，依靠两套减速齿轮组分别进行减速，用短半轴来带动车轮旋转。在系统构型设计的基础上，进行了包括电动机、减速器和电池在内的动力系统参数匹配和主减速器的设计。事实上，该驱动方案和匹配方法为新型动力系统开发提供了一定借鉴。关键词：电动车辆；车轮独立驱动系统；构型设计；电驱动车桥中国农业大学学士学位论文AbstractIIAbstractWiththeincreasinglyseriousenvironmentalpollutionandtheenergycrisis,theautoindustryisfacingseverechallenges.Tothesustainabledevelopmentoftheautomobileindustry,theword’smajorautomobilecompaniesarestartingtoresearchvariousnewtypesofpollution-freeenvironmentallyfriendlyvehicles.Inalldevelopmentprojects,theuseoftheWheel-drivenmotorsforelectriccarscantrulyachieve“zeropollution”,ithasbecomeavehicleofresearchanddevelopmentfocus.Inawiderangeoftechnicaloptionsoftheelectricvehicles,theWheel-drivenelectricvehicleshavebecomeanewresearchdirection.Inordertomakeuptheflawsofexistingin-wheelmotorsdrivingsystemforelectricvehicles,anewkindoftwo-motorindependentwheeldrivingaxlewithtwosetsofdecelerationgearclusters,hasbeendesigned.ThesystemusesLithiumironphosphatebatterytoprovidedrivingforce,twopermanentmagnetismsynchronousmotorsasdrivenequipment,dependsupontwosetsofdecelerationgearclusterstocarryonthedeceleration,leadswheelrevolvingwiththesemiaxles.Basedonthedesign,theparametersmatchingforelectricmotors,batteryandreductiongearshavebeencarriedon.Takeallabovefactorsintoconsideration,thisresearchprovidessomehelpforthedevelopmentofnewtypedrivesystems.KeyWords:electricvehicles;independentdrivingsystemofvehicles;configurationdesign;electricdriveaxl中国农业大学学士学位论文目录III目录摘要................................................................................................................................IAbstract................................................................................................................................II第一章绪论.......................................................................................................................11.1.题目背景和意义....................................................................................................................11.2.国内外研究现状和发展趋势................................................................................................21.3.存在问题...............................................................................................................................4第二章总体方案设计.........................................................................................................52.1.蓄电池的选择........................................................................................................................52.2.电动机的选择及布置方案....................................................................................................5第三章电驱动性能和动力性能匹配计算........................................................................103.1.驱动轮所需的功率和转速..................................................................................................103.2.驱动电机参数确定..............................................................................................................113.3.减速比的确定......................................................................................................................123.4.动力性分析.........................................................................................................................123.5.电池组参数的选择..............................................................................................................16第四章主减速器的基本设计............................................................................................174.1.减速比的分配......................................................................................................................174.2.主减速器齿轮的基本设计..................................................................................................174.2.1.轴的运动和动力参数的计算..................................................................................174.2.2.轴直径的初算和轴承的初步选择..........................................................................184.2.3.齿轮的设计和计算..................................................................................................19第五章主减速器的主要校核............................................................................................295.1.输入轴强度、轴承寿命及键的强度校核..........................................................................295.2.中间轴强度、轴承寿命及键的强度校核..........................................................................335.3.输出轴强度、轴承寿命及键的强度校核..........................................................................39第六章设计总结................................................................................................................44致谢................................................................................................................................45附录................................................................................................................................46驱动力-行驶阻力平衡图源程序..................................