柴油动力 SUV汽车车架与制动系统设计
摘要
本部分设计是柴油动力 SUV汽车车架与制动系统设计，根据本次设计的任务分别对不同类型的车架，制动器进行结构型式分析，确定设计方案。
车架设计，采用梯形车架，由于车架的作用是增加车身的强度和刚度，以承受弯曲和扭曲载荷。本部分设计的重点是其结构设计，重点对其纵横梁的布置，确定其尺寸参数,在对整车中受最大力的危险截面进行强度，刚度校核，能满足危险截面的车架的一点也满足比其受力小的受力截面，给出了强度计算方法并作精确的校核计算，对车架应力作了分析，验证车架强度和刚度合格。
制动系设计部分，通过制动器的各个主要部件的受力分析及制动力的大小和车轮尺寸确定制动蹄片和制动盘的大小，及制动轮缸的直径的大小；制动器为前盘后鼓式，即前制动器是浮钳式制动器，后制动器是领从蹄式制动器，其驱动机构采用双回路结构;驻车制动采用手动驻车，其驱动机构是机械式驱动机构。通过理论的推到计算，并根据总体参数和制动器的结构参数，对该车的制动性能等做细致的分析。
关键词：车架 ，制动系统，制动器，行车制动，驻车制动
DIESEL-POWERED SUV CHASSIS AND BRAKING SYSTEM DESIGN
ABSTRACT
This part is designed diesel-powered SUV frame and braking system design, According to the design of the respective tasks of different types of frame, brake structural pattern analysis, design.
Frame design, using ladder frame, the frame is the role of the body to increase strength and rigidity, and to withstand bending and twisting load. This section is designed to focus on the structural design, focusing on its vertical beam settings, to determine its size, on the vehicle in which most vigorously by the dangerous cross-section strength, stiffness Verification, can meet the dangerous section of the frame is also satisfied by the power than its small force cross section, given the strength calculation method for precise calculations and checks made on the frame stress analysis, test the strength and stiffness of the frame qualified.
Brake System Design, Brake through each of the major components of the braking force and Analysis of the size and dimension of the wheel brake pads and brake disc size, and round brake cylinder diameter size; The vehicle brake brakes forms is the former floating caliper brake, the brakes after leading from the foot brake, drive double-loop structure; Parking brake manually in the car, drive a mechanical drive. Through theoretical to the implementation, according to the overall parameters and structural parameters brake, of the car's braking performance so meticulous analysis.
KEY WORDS : frame ,braking system , brakes , service brake ,parking brake
目 录
第一章 前 言…………………………………………………………………1
第二章 车架设计……………………………………………………………2
§2.1 概述………………………………………………………………2
§2.2 车架的结构设计…………………………………………………2
§2.2.1车架的结构型式…………………………………………2
§2.2.2车架的结构设计…………………………………………4
§2.3 车架的制造工艺及材料……………………………………………6
§2.4 车架的计算…………………………………………………………7
§2.4.1 车架的受载分析……………………………………………7
§2.4.2 车架的设计计算……………………………………………8
§2.4.3 纵梁的弯矩计算……………………………………………9
§2.4.4 纵梁的抗弯截面系数的计算……………………………11
§2.4.5 弯曲应力计算……………………………………………12
§2.4.6 车架的刚度校核…………………………………………12
§2.5 车架实验………………………………………………………13
第三章 制动系统设计………………………………………………14
§3.1 概述……………………………………………………………14
§3.2 制动器的结构设计……………………………………………15
§3.2.1 鼓式制动器………………………………………………16
§3.2.2 盘式制动器………………………………………………19
§3.3 制动器的设计计算……………………………………………21
§3.3.1 制动力与制动力分配系数……………………………………21
§3.3.2 同步附着系数 …………………………………………………24
§3.3.3 前、后轮制动器制动力矩的确定……………………………25
§3.4 制动驱动机构及其设计计算…………………………………27
§3.4.1 制动驱动机构的形式…………………………………………28
§3.4.2 分路系统………………………………………………………29
§3.4.3 液压驱动机构的设计与计算…………………………………30
§3.5 应急制动和驻车制动的计算………………………………………31
§3.5.1 应急制动………………………………………………………32
§3.5.2 驻车制动………………………………………………………32
§3.6 制动器主要零件的结构设计……………………………………33
第四章 总 结………………………………………………………………38
参考文献…………………………………………………………………39
致 谢………………………………………………………………………40
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