【正文】 重慶航天職業(yè)技術學院 汽車 六檔 變速器畢業(yè)設計 專 業(yè) 機電一體化 班 級 機電 1 班 學 號 ___ 20221954 __ 姓 名 ___ 石 福 東 _ ___ 指導教師 劉 珍 來 起止日期 機電信息工程系 I 摘 要 作為汽車傳動系統(tǒng)的重要組成部分，變速器對整車 的動力性與經(jīng)濟性、操縱的可靠性與輕便性、傳動的平穩(wěn)性與效率都有著較為直接的影響。雖然傳統(tǒng)機械式的手動變速器具有換檔沖擊大，體積大，操縱麻煩等諸多缺點，但仍以其傳動效率高、生產(chǎn)制造工藝成熟以及成本低等特點，廣泛應用于現(xiàn)代汽車上。 本文在深入了解和學習變速器開發(fā)流程和相關設計理論知識的前提下，首先確定該微型汽車手動變速器的設計方案，包括齒輪和軸的總布置形式、換檔操縱機構及檔位布置形式等；其次根據(jù)所配發(fā)動機的基本參數(shù)以及考慮到整車動力性和經(jīng)濟性要求下的傳動比，設計計算出變速器主要零件的相關參數(shù)，通過對設計參數(shù)的分 析，找到影響手動變速器性能的因素，完成齒輪、軸和軸承等主要零件以及同步器同步過程的分析。同時針對各影響因素結合變速器的結構和目標性能進行優(yōu)化。在提高傳動效率，換擋舒適性，整機 NVH性能，輕量化等方面進行研究。 關鍵詞 ： 手動變速器 傳動效率 NVH性能 輕量化 II Abstract As an important part of automobile transmission, gearbox not only has a direct impact on the vehicle’s power and economy, also affects the operation reliability andease, transmission stability and efficiency． Although the traditional mechanical manual transmission has many disadvantages， such as large shift shock, huge volumeand plicated control， it is still widely used in modem cars for its advantages ofhigh transmission efficiency, mature production technique and more importantly lowcost． This thesis firmly confirms the design plan of manual gearbox of micro car, basing on the prehension and study on gearbox development process as well asrelevant theories． The design plan includes the layout of gear and shaft, layout of gearshifting operation mechanism， etc． Secondly based on the essential parameter offurnished engine and the required transmission ratio of the vehicle’s powerperformance， the related parameters on main ponents of gearbox are worked out． Via analysis to design parameters， finds out the factors which take effects on theperformance of manual gearbox． This thesis pletes gear, shaft and bearing main parts and synchronizer synchronous process analysis. Considering all the factors bined with the structure of the performance target and transmission is optimized .In improve the transmission efficiency, the shifting fort ability, the overall performance of NVH, lightweight, etc, Key word: manual transmission transmission efficiency NVH performance lightweight III 目 錄 摘 要 ......................................................................................................................................... I Abstract ...................................................................................................................................... II 一、緒論 ................................................................................................................................... 1 (一 )選題的背景及意義 ..................................................................................................... 1 (二 )國內(nèi)外研究狀況 ......................................................................................................... 2 (三 )研究的內(nèi)容 .................................................................................................................. 4 二、變速器方案的確定 .................................................................................................... 5 (一 )變速器結構方案的確定 ............................................................................................ 5 ........................................................ 5 ........................................................................................................ 10 (二 )變速器主要零件結構方案的分析 ....................................................................... 12 ................................................................................................................. 12 ........................................................................................................ 12 三、變速器主要參數(shù)的選擇 ....................................................................................... 14 (一 )變速器主要參數(shù)的選擇 .......................................................................................... 14 ........................................................................................... 14 ...................................................................................................................... 15 ................................................................................................................. 16 ................................................................................................................. 16 四、主要零件的選擇 ....................................................................................................... 18 (一 )各檔傳動比機器齒輪齒數(shù)的確定 ....................................................................... 18 .......................................................................................... 18 IV .......................................................................................... 20 (二 )變速器齒輪的強度計算與材料的選擇 .............................................................. 21 壞原因及形式 ...................................................................................... 21 ...................................................................................... 22 (三 )變速器軸的強度計算與校核 ................................................................................. 26 ........................................................................... 26 ................................................................................................................. 28 (四 )軸承的選擇與校核 ................................................................................................... 32 ................................................................................................................. 32 ............................................................................................................. 33 (五 )變速器同步器的設計 ...