机械5

微型客货两用车变速器，传动轴和操纵机构设计 摘要 经过改革开放初期我国汽车工业发展规模空前。在不断发展的经济的背景下，乘用车开始普及，走进千家万户。乡村公路上客货两用车适应面更加宽广，人民的生产与生活更加便捷，因而消费者更加容易接受。客货两用车的技术难点主要在其动力传输、变速及操纵机构上，在微型汽车的设计上，首先要考虑设计的汽车满足汽车的工作要求，发动机的功率达到工作的要求，还有变速箱和传动轴与其他汽车机构的合理布置，提高汽车的稳定性能。 所以本课题是对微型客货两用车的结构及工作原理进行深入的分析研究，优化微型客货两用车的结构，提高微型客货两用车的动力传输效率及稳定性，对于我国汽车行业的发展具有远大的研究意义的。本文就是根据设定设计的基本参数，对微型客货两用车的小车变速器、传动轴及操纵机构等重要机构及重要的零部件进行结构设计校核，设计出满足设计要求的微型客货两用车。 关键词：客货两用；动力传输；机构设计；计算校核； Abstract After the reform a
nd ope
ni
ng up, Chi
na's automobile i
ndustry has developed u
nprecede
ntedly. With the co
nti
nuous developme
nt of eco
nomy, all ki
nds of passe
nger cars have e
ntered ordi
nary families. Especially the passe
nger a
nd freight dual purposevehicles are more suitable for rural roads,which facilitate the productio
n a
nd life of the masses, a
nd are more acceptable to co
nsumers. The tech
nical difficulties of the passe
nger a
nd cargo dual purposevehicle are mai
nly i
n its power tra
nsmissio
n, tra
nsmissio
n a
nd co
ntrol mecha
nism. I
n the desig
n of the mi
ni car, the power performa
nce of the e
ngi
ne must be take
n i
nto full co
nsideratio
n, aswell as the overall arra
ngeme
nt of the gearbox a
nd the tra
nsmissio
n shaft to meet the dy
namic performa
nce of thevehicle. Therefore, this topic is a
n i
n-depth a
nalysis of the structure a
ndworki
ng pri
nciple of the mi
ni passe
nger a
nd cargo dual purposevehicle, optimizi
ng the structure of the micro passe
nger a
nd cargo dual purposevehicle, improvi
ng the efficie
ncy a
nd stability of the dy
namic tra
nsmissio
n of the mi
ni passe
nger a
nd cargo dual purposevehicle,which is of great sig
nifica
nce for the developme
nt of the automobile i
ndustry i
n Chi
na. Based o
n the basic parameters of the desig
n, this paper desig
ns a
nd checks the structural desig
n of the importa
nt orga
nizatio
ns a
nd importa
nt parts, such as the tra
nsmissio
n, tra
nsmissio
n shaft a
nd ma
nipulati
ng mecha
nism of the mi
ni passe
nger a
nd cargo dual purposevehicle, a
nd desig
ns a micro passe
nger a
nd cargo dual purposevehicle to meet the desig
n requireme
nts. Keywords: Double use of passe
nger a
nd cargo；Power tra
nsmissio
n；I
nstitutio
nal desig
n；Calculatio
n a
nd checki
ng； 目录 第一章绪论4 1.1选题的背景及意义4 1.2国内外发展及研究现状4 1.3设计的基本思路5 1.4设计的基本参数6 1.5本章小结6 第二章传动轴的设计7 2.1传动轴的设计标准7 2.2十字轴设计计算8 2.3十字轴滚针轴承的计算9 2.4万向节叉的设计计算10 2.5传动轴临界转速计算12 2.6传动轴的强度校核14 2.7传动轴花键轴的计算15 第三章变速器操纵机构的设计17 3.1变速器的结构要求17 3.2变速器的总体结构17 3.3变速器操纵机构设计18 第四章变速器的设计20 4.1传动比的确定及分配20 4.2变速器各档齿轮齿数的选择计算21 4.3齿轮的参数计算校核22 4.4变速器中间轴的结构设计及校核29 4.5轴承的选用校核35 4.6键的选择和校核36 第五章总结38 参考文献39 附录40 谢辞41