【正文】 and have a direct impact on efficiency. The design is mainly based on the relevant parameters Hafei HFJ6351B through the transmission parameters of the various parts of the selection and terms designed to meet the requirements of a basic manual transmission. Research on the basic content for: transmission transmission layout program block transmission of the transmission ratio of the distribution, transmission gear selection parameters, transmission gear unit of the block distribution, design and calculation of transmission gear, transmission shaft and bearing design, the synchronization and manipulation of body and tank design, the use of Auto CAD software draw assembly drawings and parts of eight elements, such as Fig. During the design process, the main issues to be addressed are: the determination of parameters of transmission, gear transmission design, calculation and checking, transmission shaft of the design, calculation and check calculation and design of bearings, synchronization and manipulation of bodies and body the design and assembly drawings and parts mapping the top five major problems Fig. Key words: Transmission； Transmission Ratio； Parameters； Design and Calculation III 目 錄 摘要 .............................................................................................................................. I Abstract ..................................................................................................................... II 第 1 章 緒論 ............................................................................................................ 1 汽車變速器概述 ......................................................................................... 1 汽車變速器設(shè)計(jì)的目的和意義 ................................................................ 2 汽車變速器國內(nèi)外現(xiàn)狀和發(fā)展趨勢(shì) ........................................................ 2 變速器國內(nèi)外的現(xiàn)狀 ..................................................................... 2 汽車變速器的發(fā)展趨勢(shì) ................................................................. 3 手動(dòng)變速器的特點(diǎn)和設(shè)計(jì)要求及內(nèi)容 .................................................... 4 手動(dòng)變速器的特點(diǎn) ......................................................................... 4 手動(dòng)變速器的設(shè)計(jì)要求 ................................................................. 5 設(shè)計(jì)的主要內(nèi)容 ............................................................................. 6 第 2 章 變速器傳動(dòng)機(jī)構(gòu)布置方案確定 ............................................................... 7 設(shè)計(jì)所依據(jù)的主要技術(shù)參數(shù) .................................................................... 7 變速器傳動(dòng)機(jī)構(gòu)的結(jié)構(gòu)分析和形式選擇 ............................................... 7 兩軸式變速器的特點(diǎn)分析 ............................................................. 8 中間軸式變速器特點(diǎn)分析 ............................................................. 9 倒擋布置方案分析 ....................................................................... 10 傳動(dòng)機(jī)構(gòu)布置的其他問題 ............................................................11 零部件結(jié)構(gòu)方案分析 .............................................................................. 12 齒輪形式 ........................................................................................ 12 換擋機(jī)構(gòu)形式 ............................................................................... 12 防止自動(dòng)脫擋的結(jié)構(gòu) ................................................................... 13 變速器軸承 .................................................................................... 14 本設(shè)計(jì)所采用的傳動(dòng)機(jī)構(gòu)布置方案 ...................................................... 14 本章小結(jié) ................................................................................................... 16 第 3 章 變速器主要參數(shù)的選擇和齒數(shù)分配 .................................................... 17 變速器各擋傳動(dòng)比的確定 ...................................................................... 17 IV 變速器最低擋傳動(dòng)比的確定 ....................................................... 17 變速器其他各擋傳動(dòng)比的確定 ................................................... 18 中心距的確定 ........................................................................................... 19 變速器外形尺寸的初選 .......................................................................... 19 變速器齒輪參數(shù)的選擇 .......................................................................... 20 模數(shù) ................................................................................................ 20 齒形、壓力角及螺旋角 ............................................................... 20 齒寬 ................................................................................................ 21 齒頂高系數(shù) .................................................................................... 22 變速器各擋齒輪齒數(shù)的分配 .................................................................. 22 確定一擋齒輪的齒數(shù) ................................................................... 22 對(duì)中心 距進(jìn)行修正 ....................................................................... 24 確定常嚙合齒輪的齒數(shù) ............................................................... 24 確定其他各擋齒輪的齒數(shù) ........................................................... 26 本章小結(jié) ................................................................................................... 29 第 4 章 變速器齒輪的設(shè)計(jì)計(jì)算 ......................................................................... 30 變速器齒輪的幾何尺寸計(jì)算 .................................................................. 30 計(jì)算變速器各軸的扭矩和轉(zhuǎn)速 .............................................................. 31 齒輪的強(qiáng)度計(jì)算和材料選擇 .................................................................. 32 齒輪損壞的原因和形式 ............................................................... 32 齒輪的材料選擇 ............................................................................ 33 齒輪的強(qiáng)度計(jì)算 ............................................................................ 34 本章小結(jié) .............................................................................