毕业设计手动变速器设计
- 格式:docx
- 大小:681.77 KB
- 文档页数:31
摘 要
变速器是汽车传动系统中一个比较关键的部件,它设计的好坏直接阻碍到汽车的实际利用性能。本文要紧说明了轻型客车变速器的设计计算进程,要紧分为两大部份——设计部份和工艺部份。
设计部份表达了轻型汽车手动机械变速器的功用,要求,比对了变速器各类结构方案,说明了变速器要紧参数的确信方式,齿轮的几何计算和校核进程,轴的尺寸确信和校核进程,轴承等标准零件的选用方式和同步器的选用方式。同时分析设计了与之相适应的操纵机构,最后给变速器壳体的设计方案图纸。计算要紧包括齿轮强度校核程序,轴的强度校核程序和轴的刚度校核程序。
机械加工工艺是实现产品设计,组织生产,加工操作,保证产品质量的重要依据技术保证。本文的工艺部份要紧要紧对典型零件的工艺进程进行了分析,包括轴类零件,齿轮类零件,壳体类零件,叉类零件及其他类零件,并选取有代表性的零件,确信了各类零件的材料,制定了工艺进程卡片。另外,对装配进程也给出了详细的说明。
关键词:手动变速器 齿轮 轴 同步器 壳体 工艺。
ABSTRACT
AS a common type of commercial car,the light-duty coach makes our living more
convenient.The transmission is a key component in the driveline of an automotive vehicle.This
paper,which mainly consists of two parts--the part design and the machining, introduces how the
manual transmission for light-duty coach is designed and produced.
The first part introduces the function of the transmission and the demand.By comparing
some kinds of alinements,the paper made an optimiZation.The paper also introduces how to
choose the main parameters of transmission,the gears,the shafts,the synchronizers etc.The paper
gives some MATLAB programs to check the gears and shafts in order to ensure that
transmission is safe enough when it is working.The main program of the calculation and the
result will be explained in details in another appendix.
The second part introduces the processing of machining.Machining is an important
guarantee and proof for for succeed of product design,manufacturing,processing operation and
high quality.This part mainly analyzes the machining processing of typical components, such as
shafts,gears, shells, picks and so on. It also takes some of the typical components and makes the
flowchart for the processing.Finally,the assembly process will be explained in details.
Keywords:Manual transmission Gear Shaft Synchronizer Housing
Machining 目 录
摘 要 ...........................................................................................................................................................................I
ABSTRACT ................................................................................................................................................................ II
第一章 概 述 .......................................................................................................................................................... 2
一、毕业设计任务及要求 ...................................................................................................................................... 2
二、变速器的功用和设计要求 .............................................................................................................................. 2
三、变速器的分类 .................................................................................................................................................. 3
第二章 变速器结构方案的选择 ............................................................................................................................. 5
一、两轴式变速器和中间轴式变速器................................................................................................................... 5
二、齿轮的安排 ...................................................................................................................................................... 6
三、换挡结构形式 .................................................................................................................................................. 7
四、倒档的结构方案及倒档的位置 ...................................................................................................................... 9
第三章 变速器要紧参数的选择 ............................................................................................................................. 11
一、变速器档数及各挡传动比 ............................................................................................................................ 11
二、中心距 ............................................................................................................................................................ 11
三、外形尺寸 ........................................................................................................................................................ 11
第四章 变速器齿轮参数的确信 ........................................................................................................................... 12
一、模数的选取 .................................................................................................................................................... 12
二、压力角 ............................................................................................................................................................ 12