摘要本设计课题是关于中型载货汽车的车架设计。所设计的车架结构形式是前后等宽的边梁式车架，其中纵梁和横梁的截面形状都采用槽型，纵梁与横梁通过铆钉连接。本说明书涉及了现阶段载货汽车技术的发展趋势，以及国内外载货汽车车架的发展状况；说明书还详细阐明了中型载货汽车的方案论证：车架的设计要求、车架结构的确定、车架宽度的确定、车架纵梁形式的确定、车架横梁形式的确定、车架纵梁与横梁连接形式的确定、车架的受载分析以及车架的强度计算。在计算时把车架简化成为一个位于支座上的静定结构，然后，用材料力学的知识对本车架进行强度计算，并且在满足应力要求的条件下来确定车架纵梁的断面尺寸。关键词：中型货车、车架、设计IAbstractThisdesignissueisabouttheframeofmedium-sizedtruck.Theframestructuredesignedisthesideframewiththebeamwidth,inwhichtheshapeoflongitudinalandcross-sectionbeamsareslot,railsandbeamsareconnectedbyrivets.Thispaperinvolvesinlatelythetechnologydevelopmenttrendoftruckaswellasthedomesticandforeigntruckframedevelopment;Thispaperalsoexposeindetailthemedium-sizedtruckwithschemedemonstration:therequirementofframedesign、determinationofframestructure、determinationofframewidth、determinationofstringerform、determinationofbeamsform、theconnectionformofbeams、analysisofloadtheframesuffersandthestrengthcalculation.Theframewillbesimplifiedasastableobjectivewhencalculating,andthencalculatethestrengthwithmechanicsmaterialsknowledgeanddeterminethesizeoftheframerailswiththepreconditionthatitmeetstherequirementofstress.Keywords:medium-sizedtrucks,trailers,designII目录第1章绪论·······················································11.1课题背景··············································11.2国外货车技术的发展趋势·····························11.3车架的发展···········································2第2章方案论证···················································42.1参考车型及其...