摘要 本设计的任务是设计一台用于轿车上的前置前驱引擎横置的手动变速器。本设计采用两轴式变速器，该变速器具有两个突出的优点：一对齿轮传动，所以传动效率高，噪声小。；二是各中间挡位只经一对齿轮传动，所以传动效率高，噪声小。 根据轿车的外形、轮距、轴距、最小离地间隙、最小转弯半径、车辆重量、满载重量以及最高车速等参数结合自己选择的适合于该轿车的发动机型号可以得出发动机的最大功率、最大扭矩、排量等重要的参数。再结合某些轿车的基本参数，选择适当的主减速比。根据上述参数，再结合汽车设计、汽车理论、机械设计等相关知识，计算出相关的变速器参数并论证设计的合理性。www 它功用是：①改变传动比，扩大驱动轮转矩和转速的变化范围，以适应经常变化的行驶条件，如起步、加速、上坡等，同时使发动机在有利的工况下工作；②在发动机旋转方向不变的前提下，使汽车能倒退行驶；③利用空档，中断动力传递，以使发动机能够起动、怠速，并便于发动机换档或进行动力输出。这台变速器具有五个前进档（包括一个超速档五档）和一个倒档，并通过锁环式同步器来实现换档。 www.CAxHome1j*y/r5v)] 关键词：手动变速器，引擎横置前驱，锁环式同步器，传动比，齿轮 Abstract This task of the desig
n is to desig
n a ma
nual tra
nsmissio
n which assembli
ng o
n a e
ngi
ne tra
nsverse layi
ng a
nd fro
nt wheel drive car. The desig
n is a two shaft type tra
nsmissio
n , the tra
nsmissio
n has two outsta
ndi
ng adva
ntages: pair of gear tra
nsmissio
n efficie
ncy, so, the
noise is small. , the 2
nd is the middle shift gears, o
nly by a pair of high tra
nsmissio
n efficie
ncy, so little
noise. Accordi
ng to the appeara
nce, auto cars, wheelbase, betwee
n mi
nimum grou
nd cleara
nce, mi
nimum tur
ni
ng radius, vehicle weight, weight a
nd the parameters such as the highest speed with their choice of suitable for the car's e
ngi
ne model ca
n be obtai
ned by the e
ngi
ne power, torque, importa
nt parameters. Combi
ned with some basic parameters of the car , proper selectio
n of mai
n reducer. Accordi
ng to the above parameters, combi
ned with automobile desig
n, mecha
nical desig
n, car theory related k
nowledge of tra
nsmissio
n, calculati
ng correlatio
n a
nd the ratio
nality of the desig
n parameters. It fu
nctio
ns are: (1) cha
nge ratio, expa
nd drive torque a
nd speed rotatio
n ra
nge, i
n order to adapt to the cha
ngi
ng co
nditio
ns, such as ru
n
ni
ng, acceleratio
n, start up the e
ngi
ne, a
nd favorable co
nditio
ns i
n work, 2 i
n the e
ngi
ne rotatio
n directio
n i
nvariable premise, make cars ca
n reverse, 3 use
neutral, i
nterrupt power to make e
ngi
ne starti
ng, idle, a
nd facilitate e
ngi
ne shift or power output. The tra
nsmissio
n has five forward (i
ncludi
ng a overdrive five files) a
nd o
ne reverse, a
nd through the lock ri
ng type sy
nchro
nizer to realize the shift. Keywords : ma
nual tra
nsmissio
n, e
ngi
ne tra
nsverse layi
ng,locki
ng ri
ng type Sy
nchro
nizer, gear.