目 錄1.緒論 .11.1 CAD軟件在國內(nèi)外發(fā)展現(xiàn)狀及研究意義 .11.2設(shè)計開發(fā)平臺的選取 .11.3 Unigraphics軟件的簡介 .21.4 商用車變速器在國內(nèi)發(fā)展現(xiàn)狀 21.5 機(jī)械式商用汽車變速器的技術(shù)特點(diǎn) 31.6本文主要工作 .32.變速器的結(jié)構(gòu)設(shè)計與參數(shù)選取 .42.1手動變速器的工作原理 .42.2設(shè)計參數(shù) .52.3發(fā)動機(jī)的選擇 .52.3.1發(fā)動機(jī)最大功率和相應(yīng)轉(zhuǎn)速的確定 52.3.2發(fā)動機(jī)最大轉(zhuǎn)矩的確定 62.3.3發(fā)動機(jī)型號 62.4變速器設(shè)計 .62.4.1傳動系最小傳動比選擇 62.4.2變速器形式的選擇 72.4.3傳動機(jī)構(gòu)布置方案分析 72.5變速器主要參數(shù)的選擇 .92.6軸的計算 132.7變速器軸承 142.8同步器 153.變速器的實(shí)體建模與裝配 .203.1變速器各部件的實(shí)體建模方法 203.1.1直齒輪的建模 .203.1.2斜齒輪的建模 .233.1.3一軸的建模 .273.1.4軸承的建模 .333.2變速器裝配體的建模 343.2.1 UG裝配模塊功能簡述 343.2.2添加已有的組件到裝配體 .353.2.3在裝配中定位組件 .353.2.4裝配綜合實(shí)例 .363.3平面工程圖的生成 394.變速器的仿真分析 .444.1運(yùn)動仿真 444.2有限元分析 46致 謝 .50參考文獻(xiàn) 51基于 UG 的商用車變速箱三維設(shè)計及仿真建模[摘要]本文闡述汽車變速器在汽車中的功用、汽車變速器的工作原理及汽車變速器的設(shè)計和發(fā)展形勢。討論了汽車變速器的分類情況，闡述了國內(nèi)外汽車變速器的研究現(xiàn)狀。具體說明了汽車機(jī)械式變速器的設(shè)計步驟及本課題的設(shè)計情況。文中表述了該變速器的動力傳動方案，計算列舉了相關(guān)擋位的傳動比，設(shè)計了變速器的傳動齒輪，軸等重要零部件。利用 UG 軟件進(jìn)行汽車機(jī)械式有機(jī)變速器總成設(shè)計，并配有重要的零件設(shè)計和制作過程。零部件和變速器整體的裝配制作過程，以及變速器的運(yùn)動仿真過程，二維工程圖的產(chǎn)生。有限元分析的過程。[關(guān)鍵詞]：汽車變速箱 ＵＧ 三維實(shí)體建模 運(yùn)動分析第 4 頁 共 51 頁The Design and Simulation of 3D Modeling Commercial Vehicle Transmission Gearbox Based on UG[ Abstract ] The article also elaborates the automobile transmission gearbox in automobile function, the automobile transmission gearbox principle of work and the automobile transmission gearbox design and the development situation. Discussed the automobile transmission gearbox classified situation, elaborated the domestic and foreign automobile transmission gearbox research present situation. Specifically explained the automobile mechanical type transmission gearbox design procedure and this topic design situation. In the article has indicated this transmission gearbox power drive plan, and the computation enumerated the correlation to keep off position the velocity ratio, has designed the transmission gearbox transmission gear, the axis and so on the important spare part.This article uses UG software to carry on the automobile mechanical type organic transmission gearbox always to become the design, and has the important components design and the manufacture process. Spare part and transmission gearbox whole assembly manufacture process, as well as transmission gearbox movement simulation process, two-dimensional engineering plat production. Finite element analysis process. [Key words]: gearbox ＵＧ modeling assembling Sport analysis