摘要汽车的传递动力的途径是通过汽车发动机专递至变速器然后带动驱动轮转动，变速器在这里的使用目的是在各种行驶状态下，将由发动机传出的转矩和转速改变并传递至驱动轮，使汽车在原地起步、爬坡、转弯、加速等不同工况下获得合适的牵引力和速度，这样使发动机能够在有利于的工况范围类工作。50066

通过对各种关于变速器开发流程和相关原理知识文献资料深入学习的基础上，设计一台用于小型汽车上的手动变速器。根据已知发动机的最大功率以及最大扭矩等重要参数，选择适当的传动比，确定该微型汽车手动变速器的设计方案，本设计采用中间轴式变速器原理，中间轴式结构很多优点，首先能够设置直接挡并且传动效率高，磨损及噪音小。其次在较小的中心距下仍可获得较大的一档传动比。设计计算出变速器主要零件的相关参数，并验证设计的合理性。、

毕业论文关键词：变速器，中间轴，锁环式同步器

Abstract Automotive power transmission is through courier car engine to the transmission and drive wheels turn, the transmission is here intended use in a variety of driving conditions, by the outgoing engine torque and speed changes and transmitted to the drive wheels, so that car standing start, climbing, cornering, acceleration and different conditions to get the right traction and speed, so that the engine can be in favor of the working class range of operating conditions.

Through a variety of processes and associated development on the principle of the transmission of knowledge literature in-depth study, based on the design of a small car for the manual transmission. According to the known engine's maximum power and maximum torque of other important parameters, select the appropriate gear ratio, determined that the mini-car manual transmission design, the design uses an intermediate shaft transmission principle, the intermediate shaft structure many advantages, first be able to set up a direct gear and transmission efficiency, wear and noise. Second, in a smaller center distance can still get a larger one gear ratio. Designed to calculate the transmission parameters related major parts, and verify that the design is reasonable.

Keywords: transmission, intermediate shaft, the lock ring synchronizer

目录

第一章  绪论 1

1.1 变速器的分类 1

1.1.1 手动变速器 1

1.1.2 自动变速器 1

1.1.3 无极变速器 1

1.2变速器的现状与发展 2

第二章 手动变速器的结构原理与型式分析 3

2.1 手动变速器的基本结构和工作原理 3

2.2 手动变速器的结构型式的分析和选择 4

2.2.1 手动变速器的结构型式 4

2.2.2 倒档方案的确定 5

2.3 变速器主要零件的设计要求 6

2.3.1 齿轮型式 6

2.3.2 换档机构 6

第三章  手动变速器主要零件参数设计计算 8

3.1 手动变速器的档位数和传动比 8

3.2 中间轴式变速器中心距 9

3.3 齿轮参数的设计要求 10

3.3.1 模数m 10

3.3.2 压力角α