摘要汽车在下长坡时，在重力作用下，有不断加速到危险程度的趋向。此时应当将车速限制在一定的安全值以内，并保持稳定。此外，对已停驶的汽车，应使之可靠地驻留原地不动。这些是汽车保持不动的作用统称制动。制动器是对车轮施加制动力矩以阻碍其转动的部件。目前的各类汽车所用的摩擦制动器可分为鼓式和盘式两大类。46848

  本文主要介绍了奇瑞A3汽车的前轮制动器的设计以及在此基础上的优化设计。介绍了汽车制动系统的发展、结构和分类。此论文主要是使用MATLAB软件完成对轿车制动器的优化设计，而选择优化的目标的是钳盘式制动器的碟形弹簧，以使碟形弹簧在满足力学性能要求的基础上实现体积小、重量轻的目标，从而减小制动器的体积和重量。通过优化设计使目标函数比优化前的结果下降了3.45%，达到了在满足力学性能要求的前提下使碟形弹簧体积和重量减小的目标。

毕业论文关键词：制动、盘式制动器、优化设计

Abstract  When the car drives in the long downhill,by gravity ,the car has the trend of accelerating to a dangerous degree.  At this time should be the speed limit in a certain safe value and maintain a stable.  In addition,to the cars have been suspended,should enable the car remains camped reliable. These are the role of the car intact collectively referred to as brake.   Brake to apply braking torque on the wheel in order to hinder its rotating parts.  The various types of vehicles used by the friction brake can be pided into two major categories of drum and disc. 

  This paper introduces the Chery A3 car's front wheel brake design and optimization design on this basis. Introduce the development, structure and classification of automotive brake systems. This thesis is to use MATLAB software to complete the optimization design of brakes. Select the optimal target caliper disc brake disc spring.

Make the disc spring meet the target of mechanical performance requirements on the basis of small size,light weight to Reduce the size and weight of the brake. By 

optimizing the design of the objective function decreased by 4.2% than the results before the optimization.It reaches the disc spring size and weight reduction target under the premise that meet the requirements of the mechanical properties. 

Keyword: Brake   Disc brakes   Optimal Design 

第一章 绪论---1

1.1 引言 2

1.2 研究背景 2

1.3 钳盘式制动器的设计意义及现状 3

1.4 钳盘式制动器优化设计的现状和发展 4

1.5 本文主要内容 5

第二章 钳盘式制动器的设计计算 6

2.1 钳盘式制动器工作原理 6

2.2 制动设计的主要要求 7

2.3 制动器设计的一般原则 8

2.4  滑动钳盘式制动器参数确定 9

2.4.1 设计对象主要参数 10

2.4.2 同步附着系数的确定 10

2.5 滑动钳盘式制动器的计算 11

2.5.1 钳盘式制动器的受力分析 11

2.5.2 制动盘的设计 11

2.5.3 摩擦衬块的设计 12

2.5.4 前后轴制动力矩分配系数β的确定