机械5

摘要 一辆汽车安全与否,制动系统起到至关重要作用，而制动器又是制动系统中核心所在，所以，制动器性能好坏直接影响汽车安全。盘式制动器具有反应灵敏、热稳定性好、结构简单便于制造等优点，所以盘式制动器已经逐步取代鼓式制动器。但是盘式制动器也存在着一些问题，如制动噪声、热衰退等，这些问题也存在于鼓式制动器中，盘式制动器虽然对其进行一定程度的改善，但并未完全解决。 在设计中根据轿车盘式制动特点，对制动系统结构进行进一步研究和设计。首先查阅相关文献资料，了解汽车制动原理，然后根据其原理选择简单液压制动系统作为其制动系统，并根据汽车相关结构参数，对制动器主要零部件结构参数进行选型和设计计算，最后通过制动性能分析计算得出制动器制动效果较好，强度高，使用寿命得到增加。 关键词：盘式制动器；结构选型；制动性能分析 Abstract A car is safe or
not, its braki
ng system plays avery importa
nt role,while the brake is the core i
n the braki
ng system, therefore, the brake performa
ncewill directly i
nflue
nce thevehicle safety. Disc brakes have the adva
ntages of se
nsitive reactio
n, good thermal stability, simple structure a
nd easy to ma
nufacture, so disc brakes have gradually replaced the traditio
nal drum brakes. However, there are some problems i
n disc brakes, such as brake
noise, heat decli
ne a
nd so o
n. These problems also exist i
n drum brakes. Although disc brakes have improved to a certai
n exte
nt, they have
not bee
n completely solved. I
n the desig
n accordi
ng to the characteristics of disc brake car, for further research a
nd desig
n of braki
ng system structure. First of all, co
nsult the releva
nt literature, u
ndersta
nd the pri
nciple of automobile braki
ng, a
nd the
n choose the simple hydraulic brake system as its brake system accordi
ng to its pri
nciple, a
nd accordi
ng to the related structural parameters of the car, select a
nd calculate the structural parameters of the mai
n parts of the brake. Fi
nally, the brake brake is calculated a
nd calculated through the a
nalysis a
nd calculatio
n of the braki
ng performa
nce. The effect is good, the i
nte
nsity is high, a
nd the service life is i
ncreased. Keywords: disc brakes; Structure selectio
n; Braki
ng performa
nce a
nalysis 目录 摘要I Abstract II 前言1 第1章绪论2 1.1制动系统研究的目的及目前发展现状2 1.2设计的预期目标2 1.3盘式制动器的发展方向2 第2章制动器的类别4 2.1鼓式制动器4 2.2盘式制动器5 第3章制动系统方案的分析与选择7 3.1简单制动系统7 3.2动力制动系统7 3.3伺服制动系统8 第4章盘式制动器概述9 4.1盘式制动器的原理及特点9 4.2盘式制动器的组成10 4.2.1制动盘10 4.2.2制动块10 4.2.3制动钳11 4.3盘式制动器的控制机构11 4.4制动器材料的选择12 第5章制动系统设计计算13 5.1汽车的相关参数13 5.2制动器相关计算14 5.2.1同步附着系数分析取值14 5.2.2前后制动力矩分配系数β 14 5.2.3确定制动器制动力矩14 5.3盘式制动器结构参数的确定15 5.3.1制动盘直径D 15 5.3.2制动盘厚度15 5.3.3摩擦衬块的内外半径确定15 5.3.4摩擦衬块的工作面积16 5.3.5摩擦衬块的摩擦系数16 5.4盘式制动器制动力计算17 5.5盘式制动器主要零部件材料的选择17 5.5.1制动盘17 5.5.2制动钳18 5.5.3制动块18 5.5.4制动轮缸18 5.5.5摩擦材料18 第6章液压制动机构设计计算19 6.1选择液压分路系统19 6.2液压制动主缸的设计20 6.3确定前、后轮制动轮缸直径d 21 6.4确定制动主缸直径22 6.5制动踏板力和制动踏板工作行程22 第7章制动性能分析24 7.1制动减速度j和制动距离S 24 7.2摩擦衬块的磨损特性计算24 结论26 参考文献27 致谢28