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車輛與動(dòng)力工程學(xué)院畢業(yè)設(shè)計(jì)說(shuō)明書
柴油動(dòng)力 SUV汽車車架與制動(dòng)系統(tǒng)設(shè)計(jì)
摘要
本部分設(shè)計(jì)是柴油動(dòng)力 SUV汽車車架與制動(dòng)系統(tǒng)設(shè)計(jì)，根據(jù)本次設(shè)計(jì)的任務(wù)分別對(duì)不同類型的車架，制動(dòng)器進(jìn)行結(jié)構(gòu)型式分析，確定設(shè)計(jì)方案。
車架設(shè)計(jì)，采用梯形車架，由于車架的作用是增加車身的強(qiáng)度和剛度，以承受彎曲和扭曲載荷。本部分設(shè)計(jì)的重點(diǎn)是其結(jié)構(gòu)設(shè)計(jì)，重點(diǎn)對(duì)其縱橫梁的布置，確定其尺寸參數(shù),在對(duì)整車中受最大力的危險(xiǎn)截面進(jìn)行強(qiáng)度，剛度校核，能滿足危險(xiǎn)截面的車架的一點(diǎn)也滿足比其受力小的受力截面，給出了強(qiáng)度計(jì)算方法并作精確的校核計(jì)算，對(duì)車架應(yīng)力作了分析，驗(yàn)證車架強(qiáng)度和剛度合格。
制動(dòng)系設(shè)計(jì)部分，通過(guò)制動(dòng)器的各個(gè)主要部件的受力分析及制動(dòng)力的大小和車輪尺寸確定制動(dòng)蹄片和制動(dòng)盤的大小，及制動(dòng)輪缸的直徑的大小；制動(dòng)器為前盤后鼓式，即前制動(dòng)器是浮鉗式制動(dòng)器，后制動(dòng)器是領(lǐng)從蹄式制動(dòng)器，其驅(qū)動(dòng)機(jī)構(gòu)采用雙回路結(jié)構(gòu);駐車制動(dòng)采用手動(dòng)駐車，其驅(qū)動(dòng)機(jī)構(gòu)是機(jī)械式驅(qū)動(dòng)機(jī)構(gòu)。通過(guò)理論的推到計(jì)算，并根據(jù)總體參數(shù)和制動(dòng)器的結(jié)構(gòu)參數(shù)，對(duì)該車的制動(dòng)性能等做細(xì)致的分析。
關(guān)鍵詞：車架 ，制動(dòng)系統(tǒng)，制動(dòng)器，行車制動(dòng)，駐車制動(dòng)
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 錄
第一章 前 言…………………………………………………………………1
第二章 車架設(shè)計(jì)……………………………………………………………2
§2.1 概述………………………………………………………………2
§2.2 車架的結(jié)構(gòu)設(shè)計(jì)…………………………………………………2
§2.2.1車架的結(jié)構(gòu)型式…………………………………………2
§2.2.2車架的結(jié)構(gòu)設(shè)計(jì)…………………………………………4
§2.3 車架的制造工藝及材料……………………………………………6
§2.4 車架的計(jì)算…………………………………………………………7
§2.4.1 車架的受載分析……………………………………………7
§2.4.2 車架的設(shè)計(jì)計(jì)算……………………………………………8
§2.4.3 縱梁的彎矩計(jì)算……………………………………………9
§2.4.4 縱梁的抗彎截面系數(shù)的計(jì)算……………………………11
§2.4.5 彎曲應(yīng)力計(jì)算……………………………………………12
§2.4.6 車架的剛度校核…………………………………………12
§2.5 車架實(shí)驗(yàn)………………………………………………………13
第三章 制動(dòng)系統(tǒng)設(shè)計(jì)………………………………………………14
§3.1 概述……………………………………………………………14
§3.2 制動(dòng)器的結(jié)構(gòu)設(shè)計(jì)……………………………………………15
§3.2.1 鼓式制動(dòng)器………………………………………………16
§3.2.2 盤式制動(dòng)器………………………………………………19
§3.3 制動(dòng)器的設(shè)計(jì)計(jì)算……………………………………………21
§3.3.1 制動(dòng)力與制動(dòng)力分配系數(shù)……………………………………21
§3.3.2 同步附著系數(shù) …………………………………………………24
§3.3.3 前、后輪制動(dòng)器制動(dòng)力矩的確定……………………………25
§3.4 制動(dòng)驅(qū)動(dòng)機(jī)構(gòu)及其設(shè)計(jì)計(jì)算…………………………………27
§3.4.1 制動(dòng)驅(qū)動(dòng)機(jī)構(gòu)的形式…………………………………………28
§3.4.2 分路系統(tǒng)………………………………………………………29
§3.4.3 液壓驅(qū)動(dòng)機(jī)構(gòu)的設(shè)計(jì)與計(jì)算…………………………………30
§3.5 應(yīng)急制動(dòng)和駐車制動(dòng)的計(jì)算………………………………………31
§3.5.1 應(yīng)急制動(dòng)………………………………………………………32
§3.5.2 駐車制動(dòng)………………………………………………………32
§3.6 制動(dòng)器主要零件的結(jié)構(gòu)設(shè)計(jì)……………………………………33
第四章 總 結(jié)………………………………………………………………38
參考文獻(xiàn)…………………………………………………………………39
致 謝………………………………………………………………………40
IV