摘 要變速器是汽車的核心組成部分，用來改變發(fā)動機傳到驅動輪上的轉矩和轉速，將動力有效而經濟地傳至驅動車輪，以滿足汽車的使用要求。變速器是完成傳動系任務的重要部件，也是決定整車性能的主要部件之一。變速器的設計水平對汽車的動力性、燃料經濟性、換擋操縱的可靠性與輕便性、傳動平穩(wěn)性與效率等都有直接的影響。隨著汽車工業(yè)的發(fā)展，轎車變速器的設計趨勢是增大其傳遞功率與重量之比，并要求其具有更小的尺寸和良好的性能。本設計以一汽大眾捷達 GTX 變速器為基礎，在給定發(fā)動機輸出轉矩、轉速及最高車速、最大爬坡度等條件下，著重對變速器齒輪的結構參數、軸的結構尺寸等進行設計計算；并對變速器的傳動方案和結構形式進行設計；同時對操縱機構和同步器的結構進行設計；從而提高汽車的整體性能。關鍵詞：捷達；變速器；齒輪；設計；結構ABSTRACTTransmission is the core components of automobile.Its task is transforming and regulateing the performance of engine. It can be used to change the engine driving wheel on the spread of torque and speed. Transmission is the important part of drivetrain components to complete the tasks. as well as one of the main factor to decide the whole performance of vehicle. The standards of Transmission designing can directly impact the vehicle dynamics, fuel economy, the reliability and portability of shifting , the smoothness and efficiency of Transmiting. Along with the development of the automobile industry,the trend of car transmission designing is to increase its transmission power and decrese its weight,and hope have smaller size and excellent performance. The design based on the FAW-Volkswagen Automotive Company Ltd’JETTA Transmission, In conditions that knowing the engine output torque,speed of engine and maximum speed of vehicles, maximum degree, focus on the designing of transmission gear structural parameters, axis geometry design computation; as well as the transmission and drive program structure design; Meanwhile on the structure of components to manipulation and synchronous design; thereby enhancing the overall performance of cars.Key words: JETTA ；Transmission；Gear ；Design；Structure哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- III –哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- IV –目 錄摘要·····························································ⅠAbstract ·························································Ⅱ目錄····················································Ⅲ第 1 章 緒論·····················································11.1 概述·····················································11.1.1 汽車變速器的設計要求···································11.1.2 國內外汽車變速器的發(fā)展現狀·····························21.2 設計的內容及方法·········································31.3 設計的目的及意義·········································4第 2 章 變速器傳動機構與操縱機構的選擇與設計················52.1 變速器傳動機構布置方案···································52.1.1 變速器傳動方案分析與選哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- V –擇···························52.1.2 倒檔布置方案·······································62.1.3 零部件結構方案分析·····································72.2 變速器操縱機構布置方案···································92.2.1 概述····················································92.2.2 典型的操縱機構及其鎖定裝置····························102.3 本章小結················································12第 3 章 變速器的設計與計算····································133.1 變速器主要參數的選擇····································133.1.1 檔數···················································133.1.2 傳動比范圍·············································133.1.3 變速器各檔傳動比的確定································14哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- VI –3.1.4 中心距的選擇···········································173.1.5 變速器的外形尺寸······································173.1.6 齒輪參數的選擇········································173.1.7 各檔齒輪齒數的分配及傳動比的計算······················193.1.8 變速器齒輪的變位及齒輪螺旋角的調整····················233.2 變速器齒輪強度校核······································253.2.1 齒輪材料的選擇原則····································253.2.2 變速器齒輪彎曲強度校核································253.3 軸的結構和尺寸設計······································303.4 軸的強度驗算············································323.4.1 軸的剛度計算···········································323.4.2 軸的強度計算·······························哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- VII –············353.5 軸承選擇與壽命計算······································393.5.1 輸入軸軸承的選擇與壽命計算····························393.5.2 輸出軸軸承的選擇與壽命計算····························423.6 本章小結················································44第 4 章 變速器同步器及結構元件設計···························454.1 同步器設計·············································454.1.1 同步器的功用及分類································454.1.2 慣性式同步器······································454.1.3 鎖環(huán)式同步器主要尺寸的確定························474.1.4 主要參數的確定····································484.2 變速器殼體·············································504.3 本章小結················································50哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計___________________________________________________________________________________________- VIII –結論·····························································51參考文獻························································52致謝·····························································53