机械5

L3000货车汽车传动系统驱动桥的设计 摘要 随着汽车对安全、节能、环保的不断重视，汽车后桥作为整车的一个关键部件，其产品的质量对整车的安全使用及整车性能的影响是非常大的，因而对汽车后桥进行有效的优化设计计算是非常必要的。 本文的主要工作是围绕L3000货车的驱动桥而展开，根据该L3000货车的参数，对其驱动桥进行计算和结构设计。作为汽车的关键传动部件之一，驱动桥具有重要作用，驱动桥主要一般由主减速器，桥壳，差速器，半轴等结构组成，该驱动桥一般主要位于变速器输出轴位置，即整个传动系统的末端位置。驱动桥的作用是是通过将变速器输入通过减速作用将该传动扭矩进行进一步放大，然后再分配到汽车的左右两轮位置，因此，该驱动桥不仅作为动力传递部件，而且还是整个汽车的一个重要的承载部件。当采用大功率发动机输出大的转矩以满足目前载重汽车的快速、重载的高效率、高效益的同时，必须要搭配一个高效、可靠的驱动桥。 作为汽车的传动和承载部件，进行设计时，不仅要考虑其传动过扭矩值时齿轮、轴系的强度，还要考虑到其本身作为支承部件的强度和刚度等。汽车的噪音，传动效率以及传动部件的耐用性等，主要取决于汽车的传动系统，其中主要包括发动机、变速器、驱动桥总成等。 关键词：L3000货车,货车驱动桥，齿轮计算，结构设计 Abstract With the co
nti
nuous atte
ntio
n of the car to safety,e
nergy co
nservatio
n,a
nd e
nviro
nme
ntal protectio
n,the rear bridge of the car is a key compo
ne
nt of thevehicle,a
nd the quality of its products has a great impact o
n the safe use of thevehicle a
nd the performa
nce of thevehicle.Therefore it isvery
necessary to carry o
n the effective optimizatio
n desig
n calculatio
n for the rear bridge of the car. The mai
nwork of this paper is arou
nd the drivi
ng bridge of the L3000 truck.Accordi
ng to the parameters of the L3000 truck,the drivi
ng bridge is calculated bridge is calculated a
nd the structure desig
n is carried out.As o
ne of the key tra
nsmissio
n parts of automobile drive axle plays a
n importa
nt role, mai
n ge
nerally by the mai
n reducer drive axle, axle housi
ng, differe
ntial a
nd half shaft structure, such as the drive axle ge
neral is mai
nly i
n the gearbox output shaft positio
n,
namely the positio
n at the e
nd of the e
ntire tra
nsmissio
n system. Is through the role of drive axle tra
nsmissio
n i
nput by slowi
ng effectswill further e
nlarge the tra
nsmissio
n torque, a
nd the
n assig
ned to arou
nd two rou
nds of car positio
n, therefore,
not o
nly the drive axle as power tra
nsmissio
n compo
ne
nts, but also a
n importa
nt beari
ng thewhole car parts. Whe
n usi
ng high power e
ngi
ne output torque to meet the curre
nt fast a
nd heavy loadvehicles, the high efficie
ncy a
nd high efficie
ncy,must be matchedwith a
n efficie
nt a
nd reliable drive bridge. As tra
nsmissio
n of car a
nd beari
ng parts, to carry o
n the desig
n,
not o
nly to co
nsider the tra
nsmissio
n torquevaluewhe
n the gear, the stre
ngth of the shaft system, a
nd co
nsideri
ng its itself as a stre
ngth a
nd stiff
ness of beari
ng parts. The
noise, tra
nsmissio
n efficie
ncy a
nd durability of the tra
nsmissio
n compo
ne
nts are mai
nly depe
nde
nt o
n the tra
nsmissio
n system of the automobile,which mai
nly i
ncludes the e
ngi
ne, tra
nsmissio
n, drive axle assembly a
nd so o
n. The mai
nwork of this paper is to focus o
n the drive axle of L3000 truck car. Keywords: L3000 truck; Truck drive bridge; Gear calculatio
n; The structure desig
n. 目录 第1章绪论1 1.1课题背景与意义1 1.2驱动桥的现状及发展趋势3 第2章L3000货车驱动桥的总体方案设计5 2.1设计参数及要求5 2.2驱动桥的总体方案设计5 2.2.1结构形式的确定5 2.2.2主减速器结构方案的选择6 2.2.3差速器结构的确定10 2.2.4驱动轴型式的确定10 第3章主减速器的基本参数选择与设计计算13 3.1主减速比的计算13 3.2主减速齿轮载荷的计算13 3.3主减速器齿轮参数的选择14 3.4主减速器齿轮的几何尺寸计算15 3.4.1主减速器螺旋锥齿轮的强度计算17 3.4.2主减速器齿轮轴承的载荷计算18 3.5主减速器齿轮的材料20 3.6主减速器输入轴的设计20 第4章差速器的基本参数的选择与设计计算21 4.1基本参数的选择21 4.2齿轮的几何尺寸计算22 4.3差速器齿轮的强度计算23 4.4差速器齿轮的材料24 第5章半轴的设计25 5.1半轴的设计与计算25 5.2半轴材料的选择26 第6章驱动桥桥壳的设计27 6.1桥壳的计算与校核27 6.1.1静弯曲应力计算27 6.1.2在冲击载荷作用下的强度计算28 6.1.3以最大牵引力的强度计算28 结论31 附录33 参考文献41 致谢43