摘 要

随着轿车速度的不断变快和人们对轿车安全性要求的提高，轿车制动系统显得越来越重要。而鼓式刹车装置作为目前在经济型轿车中使用的最多的一种摩擦刹车装置，却还存在着许多问题。因此改进它机构中存在的问题，使其能够稳定、高效运行的研究对整个轿车行业的发展来说意义重大。

本论文是以实际产品为基础，并结合理论设计的要求，对桑塔纳轿车的制动系统进行结构形式的选择、主要参数的计算、零件的选择设计和结构的校核计算等。在设计计算过程中通过查阅大量资料并联系实际情况不断进行修改、优化，力求使所设计的刹车装置与目标车辆更加的相匹配。

关键词：制动系统；结构形式；选择设计；校核计算

table of Contents

Abstract

1 Introduction 1

1.1 Research Purpose and Significance of the Question 1

1.2 Current Development Status and Trends 1

1.3 Main Contents and Objectives of this Question 1

2 Working principle and structure analysis of drum brake device 3

2.1 Introduction to Car Braking System 3

2.2 Basic working principle of drum brakes 4

2.3 Drum brake device structure 5

2.4 Comparison and Selection of Characteristics of Various Types of Drum Brake Devices 10

3 Selection and Design Calculation of Main Parameters of Brake System

3.1 Synchronous adhesion coefficient 12

3.2 Brake Strength and Adhesion Factor Utilization 14

3.3 Maximum braking torque of brake device 16

3.4 Structural Parameters and Friction Coefficient of the Brake Device 17

3.5 Design Calculation of Braking Devices 19

4 Structure Design of Main Parts of Brake Device 26

4.1 Selection of major parts 26

4.2 Checking and Calculation of Structure 31

References 35

Design of Braking System for Santana 1.6L Car

Abstract

As the vehicle speed becomes faster and people constantly improve vehicle safety requirements, brake systems become increasingly important. The drum brake as a friction brake is currently the most used in the economy car, and still there are many problems. Therefore improving its organization problems that it can stable and efficient operation of research on the development of the automotive industry is of great significance.

Research on this subject is based on the actual product, and theoretical design requirements for an economy car rear drum brake structure selection, checking choose design and calculation of the main parameters of the structure, part of calculation. In the design calculation process by access to large amounts of information and links to the actual situation constantly changes, optimization, and strive to make the brake with the target vehicle designed more matches.

Keywords：Drum brake; Structure; Select Design; Checking calculation;

1 Introduction

1.1 Research Purpose and Significance of the Question

We know that under the condition of ensuring safe driving, in order to improve the transportation efficiency, cars should be driven at high speeds as much as possible, but they also need to slow down and stop. The braking system is the most important system in ensuring the safe driving of cars. Nowadays, with the increasing complexity of road traffic conditions and the increase in traffic volume, the number of braking systems we use during normal driving is increasing. This requires that our braking system must have higher performance and more Long service life. It is envisaged that if the braking system cannot be reliable when braking is needed, the rapid response will decelerate and stop the car, which will cause great damage to the life safety and property of the occupants.

1.2 Current Development Status and Trends

When the car was on the stage of history as an industrial product, the research on the brake system of the sedan car had never stopped. In recent years, with the growth in the number of vehicles and the ever-accelerating wheel, the research and development of the braking system has entered a period of high tide. As the brake device is the core component of the brake system, the research on it has already presented a white-hot state. At present, the friction type brake device is a kind of brake device that is widely used. According to the type of the frictional auxiliary rotating element, it can be divided into a drum type and a disc type. In the disc type, the sliding clamp disc is the most widely used one at present. From the perspective of reliability and safety, the disc brake device is widely used because it has much better thermal and water stability and attenuation resistance than a drum brake device. However, the disadvantages of the disc brake device are also obvious. Its low performance, poor protection against dust and rust, and the need to install more complicated hand drive mechanism to parking brake, taking into account these problems many cars The brake system takes the form of a front plate rear drum. For electric cars and hybrid cars equipped with regenerative braking motors, it introduces a new type of brake that can brake when reclaiming braking energy. As a new type of brake device, it will inevitably have a profound impact on the traditional brake device. The electric brake system brake device is not an independent new brake device. It is based on the traditional brake device technology. The best example is that it is also divided into disc type and drum type. However, drum-type electric brakes have largely overcome the shortcomings of the traditional drum-type recession, and are relatively simple in terms of their structure and manufacturing process. Therefore, there is still great room for development. Affected by the development of information and electronic technology, vehicles are also moving from purely mechanical devices in the traditional sense to the development of modularization, integration, electronics, and the high voltage of vehicles for energy. Of course, the braking system cannot be an exception. Under the active promotion of Bosch, Siemens, and Tevez giant car parts manufacturers, the electric brake system is bound to be the mainstream of the future, and the braking system performance will also develop by leaps and bounds.

1.3 Main content and purpose of this topic

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