摘    要
 
汽车变速器是汽车总成部件中的重要组成部分，是主要的传动系统。变速器的结构对汽车的动力性、经济性、操纵的可靠性与轻便性、传动的平稳性与效率等都有直接影响。
本设计是依据哈飞HFJ6351B的有关参数，通过各部分参数的选择和计算，设计出一个令自己满意的手动变速器。设计的基本内容是：变速器传动机构布置方案，变速器各挡传动比的分配，变速器齿轮参数选择，变速器各挡齿轮齿数分配，变速器齿轮设计计算，变速器轴和轴承的设计计算，同步器和操纵机构及箱体的设计，利用Auto CAD软件绘制装配图和零件图等八项内容。在设计过程中主要需解决的问题有：变速器各参数的确定，变速器齿轮的设计、计算及校核，变速器轴的设计、计算及校核和轴承的校核计算，同步器和操纵机构及箱体的设计以及绘制装配图及零件图五大主要问题。
关键词：变速器；传动比；参数；设计计算；校核
ABSTRACT
Automotive transmission parts in the automobile assembly of an important part of the main drive system. Transmission of the power structure of the vehicle, economy, manipulation of the reliability and portability, the smooth drive and have a direct impact on efficiency.
The design is mainly based on the relevant parameters Hafei HFJ6351B through the transmission parameters of the various parts of the selection and Design a to my own satisfaction manual transmission. Research on the basic content for: transmission transmission layout program block transmission of the transmission ratio of the distribution, transmission gear selection parameters, transmission gear unit of the block distribution, design and calculation of transmission gear, transmission shaft and bearing design, the synchronization and manipulation of body and tank design, the use of Auto CAD software draw assembly drawings and parts of eight elements, such as Fig. During the design process, the main issues to be addressed are: the determination of parameters of transmission, gear transmission design, calculation and checking, transmission shaft of the design, calculation and check calculation and design of bearings, synchronization and manipulation of bodies and body the design and assembly drawings and parts mapping the top five major problems Fig.
Key words: Transmission；Transmission Ratio；Parameters；Design and Calculation；Checking