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車輛與動力工程學院畢業(yè)設計說明書 實用微型客車設計—車架、制動系設計 摘要 汽車制動系是保證汽車及駕駛者生命安全的重要部分，制動系是使行進中的汽車減慢速度或者停止運動。 這次我的畢業(yè)設計題目是微型客車設計---車架和制動系設計。在第二章我主要介紹了制動系的概況和設計時應滿足的基本要求。第三章主要是制動系的類型及最后確定的方案，其中列出了幾種可供選擇的類型并進行了分析、比較最后確定的方案如下：行車制動器：前盤后鼓，盤式制動器為通風型浮動鉗盤式制動器，鼓式制動器為領從蹄式制動器。第四章主要介紹了制動系主要結構參數的選擇并進行了簡單的計算，是本設計說明書的核心部分，其中包括鼓式和盤式制動器主要結構參數的選擇，例如：制動鼓內徑、摩擦襯片寬度和包角、摩擦襯片起始角、制動盤直徑和厚度等，同時對制動力和制動力矩分配系數進行了計算。第五章主要對駐車制動和應急制動進行了簡單的計算。第六章介紹的是制動器主要零件的結構設計，如制動鼓、制動蹄、制動底板和制動輪缸等。第七章包括制動驅動機構的選擇和計算，制動管路的分路系統(tǒng)和液壓驅動機構的設計和計算。第八章列出了車架的幾種類型，分析比較之后，最后確定選用前窄后寬的邊梁式車架，并且在這一章中對車架的彎曲強度進行了計算，對車架的剛度進行了校核。通過這一系列的分析、計算、校核等，這套設計方案是可行的。 THE DESIGN OF PRARECTICAL MINIATURE CAR’S —THE DESIGN OF FRAME AND BRAKE SYSTEM ABSTRACT The brake system is an important part to keep safety for automobile, the purpose of the braking system is to slow down and stop the moving automobile. My topic in this graduation design is the design of frame and the brake system.In second chapter we mainly introduced something about the brake system and some requests which the brake system should satisfied. The third chapter mainly introduced the type of the brake system and finally determined the plan, in this chapter we listed several kinds to choose, at last we determined the plan through analysis and compare with as follows: In traveling brake system, the former wheels are disc brake and the rear wheels are drum brake. The disc brake for ventilating fluctuation pliers disc brake, and the drum type brake for collar from foot brake. The fourth chapter mainly introduced the main design parameter’s choice and has carried on the simple computation, and this chapter is the most important part. Including drum type and disc brake main design parameter choice, For example: The brake drum inside diameter, the width, the angle and the outset angle, the diameter and thickness of the brake plate and so on, simultaneously have carried on the computation to the brake strength and the braking moment distribution coefficient. The fifth chapter mainly said the vehicle to brake on stopping and momentary through simple computation. The brake major parts structural design, like brake drum, brake shield plate or disc and brake wheel cylinder and so on were designed in the sixth chapter. Seventh chapter including applies the brake the driving mechanism choice and the computation, the brake line by-pass system and the hydraulic pressure driving mechanism design and the computation. Eighth chapter has listed the frame several kind of types, after the analysis comparison, after finally front determined selects the narrow width side beam plate frame, And has carried on the computation in this chapter to the frame bending strength, has carried on the examination to the frame rigidity. Through this a series of analysis, computation, examination and so on, this set of design proposal is feasible KEY WORDS: brake system, drum brake, disk brake, frame 目 錄 第一章 前言…………………………………………………………......1 §1.1 汽車的誕生與世界汽車工業(yè)的發(fā)展……..…….……….…....1 §1.2 我國汽車工業(yè)的發(fā)展………….………….……………..…....2 第二章 制動系概況………………………………………………..…....4 第三章 制動系的結構類型及選擇………………………………..…....6 §3.1 后輪鼓式制動器的選擇…………………………………........6 §3.2 前輪盤式制動器的選擇…………………………………...….9 §3.3 盤式制動器的優(yōu)缺點及確定的方案………………………..10 第四章 制動系參數選擇及計算…………………………………........11 §4.1 制動器主要結構參數的選擇………………………….….....11 §4.2 制動力與制動力矩分配系數………………………………..14 第五章 駐車制動和應急制動計算…………………………………....18 §5.1 駐車制動計算………………………………………………..18 §5.2 應急制動計算…………………………………………..…....19 第六章 制動器主要零件的結構設計………………………………....20 第七章 制動驅動機構的選擇及計算………………………………....22 第八章 車架…………………………………………………………....26 第九章 總結……………………………………………………….…...33 參考文獻………………………………………………………….….....34 致謝………………………………………………………………...…...35 III