轻型货车变速器设计

摘要

随着国民经济的持续发展，机械工业也在不断地发展，各种设备都在不断地进步，创新。特别是在汽车方面，轻型货车变速器得到广泛应用，在某些特定的场合，传统的轻型货车变速器得不到应用。比如，传动精度不好控制，保养维护费用较高;同时在安全方面也存在一定的问题等等。希望在保证安全的前提下，是工作人员更加舒适，方便的操作。即便是传统轻型货车变速器传动效率较高，但是对于人们的经济能力，它的价格还让人难以接受。所以研究一种新式轻型货车变速器势在必行！

轻型货车变速器作为机动车辆中的核心部件的一种，它工作时，发动机通过V带传动带动轻型货车变速器转动，从而间接地带动了车轮的转动，这样车辆就可以行驶了。

本文介绍了轻型货车变速器的结构组成、工作原理以及主要零部件的设计中所必须的理论计算和相关强度校验，以及对其结构进行创新设计，该轻型货车变速器的优点是传动链短、效率高、易加工、使用和维护都很方便，较适合在恶劣的环境下工作，最主要的是其传动效率很高。

关键词：轻型货车变速器；扭矩；结构；校验

Abstract

With the continuous development of national economy, machinery industry is in constant development, all sorts of equipment is in constant progress, innovation. Especially in the case of motor, transmission is widely used. In certain situations, the traditional transmission is very unpopular. Bad control precision and the maintenance cost is higher. At the same time there are also certain problems in security. Therefore, higher requirements for the safety of the whole machine, operation will also bring strong shock to the staff, makes the operation very uncomfortable. Although traditional gearbox transmission efficiency is higher, shifting effect is good, but the price is more expensive, general users are difficult to accept. So study a new type of transmission is imperative.

According to the market survey, Gearbox must satisfy today's people to the automobile speed regulating the flexibility control requirements, such as can not change the engine torque and rotational speed, driving force and speed change gear box. Under the condition of the engine crankshaft rotating direction invariable, the gearbox forward or backward;Under the condition of the engine does not put out, can make the gearbox parking or fixed operations for a long time.

Transmission as a core component of motor vehicle, it is working, engine driven by V belt transmission gearbox rotation, thus indirectly driven wheel rotation, so vehicles can drive.

This paper introduces the structure of planetary gear type automatic shift gearbox in the composition, working principle and design of main components necessary to theoretical calculation and strength check, as well as the innovative design on its structure, The advantage of the gearbox transmission chain is short, high efficiency, easy processing, use and maintenance is very convenient, suitable for working under harsh environment, is the most important of its transmission efficiency is very high.

Key words：Planetary gear type automatic transmission gearbox;Crankshaft;Processing craft;Fixture;

目录

第一章绪论 (1)

1.1课题的来源及研究的目的和意义 ......................... 错误!未定义书签。

1.2本课题研究的主要内容 (3)

第二章轻型货车变速器的总体方案设计 (5)

2.1 轻型货车变速器的结构形式 (6)

2.2 齿轮传动机构的特点 (8)

2.3 确定齿轮传动类型 (10)

第三章轻型货车变速器传动系统的设计 (11)

3.1 轻型货车变速器内部传动系统的具体结构 (12)

3.2 齿轮的计算 (12)

3.2.1 配齿计算 (13)

3.2.2 几何尺寸计算 (14)

3.2.3 装配条件验算 (16)

3.3行星轴的设计计算 (17)

3.3.1 初算轴的最小直径 (18)

3.3.2 输入轴的设计 (20)

3.3.3 输出轴的设计 (21)

第四章轻型货车变速器内部主要传动零件的强度校核 (23)

4.1 传动轴的强度校核 (24)

4.2 传动齿轮的强度校核 (25)

4.3 轴承强度的校核 (28)

第五章设计总结 (29)

结论 (30)

参考文献 (31)

致谢 (32)