摘  要
汽车变速器，是一套用于来协调发动机的转速和车轮的实际行驶速度的变速装置，用于发挥发动机的最佳性能。变速器可以在汽车行驶过程中，在发动机和车轮之间产生不同的变速比，通过换挡可以使发动机工作在其最佳的动力性能状态下。
文中对变速器的主要参数进行了验证，包括齿轮强度的校核、变速器轴度和刚度的校核、轴承寿命的验算等。计算结果表明整体性能满足要求。
此变速器的齿轮都为标准齿轮，档位数和传动比与发动机参数匹配，保证了汽车具有良好的动力性和经济性。该变速器具有操纵简单、方便、传动效率高、制造容易、成本低廉、维修方便的特点，适合轻型货车的使用。
关键词：变速器；中间轴；设计；传动比；齿轮
 

Abstract
Automotive transmission, is used to coordinate the speed of the engine and the wheels of the actual speed of the transmission device, used to play the best performance of engine. The transmission can be in the running process of the automobile, the engine between the wheels and the different transmission ratio, by shifting can make the engine work in the best state of dynamic performance.
The main parameters of transmission have been checked, including the strength of gears, the transmission shafts’ strength and stiffness , bearing life. The results show that the whole performance meet the requirement.
The transmission gear for standard gear, gear number and transmission ratio and engine parameter matching, ensures that the car has a good power performance and the economy of. The transmission has simple operation, convenient, high transmission efficiency, easy manufacture, low cost, convenient repair, suitable for the use of light truck.
    Keywords :Transmission;Intermediate Axle; Design ;Gear ratio; Gear