【正文】 ..................................................................................................6 3 變速器主要參數(shù)的設(shè)計(jì)與計(jì)算 ......................................................... 7 檔數(shù)的選擇 ................................................................................................................7 傳動(dòng)比的確定 ............................................................................................................7 ..................................................................................................8 ..............................................................................................8 中心距的確定 ............................................................................................................9 外形尺寸的初選 ........................................................................................................9 齒數(shù)參數(shù)的 選擇 ........................................................................................................9 ..........................................................................................................................9 ....................................................................................................................10 ....................................................................................................................10 ........................................................................................................................ 11 各檔齒輪齒數(shù)分配 ..................................................................................................12 ................................................................................................12 ................................................................................................12 ....................................................................................................12 變速器齒輪 的 變位 ..................................................................................................16 ....................................................................................................17 ....................................................................................................17 4 變速器 的 齒輪與軸的設(shè)計(jì)計(jì)算及校核 ............................................ 17 齒輪的設(shè)計(jì)與計(jì)算 ..................................................................................................17 桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文）報(bào)告用紙 ....................................................................................................18 ............................................................................................18 ....................................................................................................18 ........................................................................................................19 軸的設(shè)計(jì)與計(jì)算 ......................................................................................................24 ........................................................................................................24 ........................................................................................................25 ........................................................................................................26 ................................................................................................26 ........................................................................................................27 軸承的選擇與校核 ..................................................................................................32 ....................................................................................32 ....................................................................................34 5 變速器同步器及操縱機(jī)構(gòu)的選擇 ................................................... 35 同步器 的選擇 ..........................................................................................................35 ....................................................................................................35 ............................................................................................................35 操縱機(jī)構(gòu)的選擇 ......................................................................................................37 ........................................................................................................................37 ........................................................................................................37 ....................................................................................................38 6 變速器殼體的設(shè)計(jì) .......................................................................... 39 7 工藝過(guò)程分析 ................................................................................. 40 齒輪加工工藝分析 ..................................................................................................40 變速器裝配過(guò)程工藝分析 ......................................................................................41 8 結(jié)論 ................................................................................................ 42 謝辭 ...................................................................................................... 43 參考文獻(xiàn) .............................................................................................. 44 附錄 ...................................................................................................... 45 桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文） 報(bào)告用紙 第 1 頁(yè) 共 45 頁(yè) 引言 低速載貨 汽車(chē) （原四輪農(nóng)用運(yùn)輸車(chē)）：與三輪汽車(chē)是 C3駕駛證規(guī)定的駕駛車(chē)型。 變速器的三維仿真結(jié)果表明，中間軸式五檔變速器的方案是可行的， 其相關(guān)參數(shù)的選擇 計(jì)算 及校核 結(jié)果表明整體性能滿足要求。 本次 關(guān)于 低速載貨汽車(chē)變速器 的設(shè)計(jì)是 以 現(xiàn)有企業(yè)生產(chǎn) 的現(xiàn)有汽車(chē) 變速器作為設(shè)