機械式變速器設計畢業(yè)論文

1、哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計（論文） 哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計（論文）- I -摘要變速器是汽車傳動系中的主要部件之一。變速器由變速傳動機構和變速操縱機構兩部分組成。變速傳動機構的主要作用是改變轉距和轉速的數(shù)值和方向；操縱機構的主要作用是控制傳動機構，實現(xiàn)變速器傳動比的改變，即實現(xiàn)換擋，以達到變速變距。本題目主要進行寶馬 120i 汽車三軸六擋機械式變速器的設計，包括變速器的整體結構和齒輪傳動部分的設計，并進行相

2、關的計算與校核。經(jīng)過設計與校核，該變速器主要結構符合設計標準、零件強度也達到了使用要求。關鍵詞 關鍵詞：汽車機械變速器；三軸六擋；傳動比；齒輪哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計（論文） 哈爾濱工業(yè)大學華德應用技術學院畢業(yè)設計（論文）- III -目錄摘要···············&

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5、83;······· IAbstract···························

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7、#183;························· II 第 1 章 緒論·········

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10、#183;·41.1 選題的背景及意義································

11、3;································· 4 1.2 變速器的功用和要求

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13、183;························· 31.3 國內(nèi)外研究狀況·········

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15、83;······················· 4 1.4 部分已知的主要參數(shù)··········

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17、#183;··············· 61.5 本章小結···················&

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19、;······················ 6第 2 章 機械式變速器的概述及其方案的確定··········

20、83;································72.1 變速器結構方案的確定·

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22、183;····················· 72.1.1 變速器傳動機構的結構分析與型式選擇···········

23、;····················7 2.1.2 倒擋傳動方案··············&

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25、;··········· 122.2 變速器主要零件結構方案的分析······················

26、························ 132.2.1 齒輪型式··········

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28、#183;···················· 142.2.2 換擋機構型式·············&#

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30、············ 142.3 本章小結·······················

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32、83;·················16第 3 章 變速器主要參數(shù)的選擇與主要零件的設計···············

33、;···················· 173.1 變速器主要參數(shù)的選擇·············

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35、183;········173.1.1 擋數(shù)和傳動比·························

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37、73.1.2 中心距···································

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39、3;193.1.3 軸向尺寸··································&#

40、183;································· 203.1.4 齒輪參數(shù)·

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42、83;······························ 203.2 各擋傳動比及其齒輪齒數(shù)的確定··

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44、183;······· 213.2.1 確定各擋齒輪的齒數(shù)··························

45、··························· 223.2.2 齒輪變位系數(shù)的選·······

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47、83;············ 243.3 變速器齒輪的強度計算與材料的選擇····················&#

48、183;··················· 253.3.1 齒輪的損壞原因及形式··············

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50、 3.3.2 齒輪的強度計算與校核··································

51、;················ 253.4 變速器軸的強度計算與校核·················&#

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53、1 變速器軸的結構和尺寸··································

54、3;················ 29 3.4.2 軸的校核··················

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56、3;············· 313.5 軸承的選擇與校核·····················

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58、83;·······353.5.1 幾種軸承的特點與選擇··························&

59、#183;······················· 35 3.5.2 軸承的校核··········&#

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