購買設計請充值后下載，，資源目錄下的文件所見即所得，都可以點開預覽，，資料完整，充值下載可得到資源目錄里的所有文件。。?！咀ⅰ浚篸wg后綴為CAD圖紙，doc,docx為WORD文檔，原稿無水印，可編輯。。。帶三維備注的都有三維源文件，由于部分三維子文件較多，店主做了壓縮打包，都可以保證打開的，三維預覽圖都是店主用電腦打開后截圖的，具體請見文件預覽，有不明白之處，可咨詢QQ:1304139763===========題目最后備注XX系列，只是店主整理分類，與內(nèi)容無關，請忽視
1 推土機變速箱設計 摘要 本設計為推土機變速箱設計，其要求為變速箱結構簡單，體積小，質量輕， 工作可靠，使用方便。 首先確定變速箱的傳動方案，選用機械式人力換擋，五個前進擋，四個倒 退擋。換擋方式采用人力換擋， 。然后進行變速箱主要參數(shù)的確定，通過對齒輪 和州的設計選擇及強度計算，軸承的壽命驗算，以及變速箱符合設計要求。 關鍵詞：推土機，機械式變速箱，設計 2 Bulldozer Transmission Design Abstract Dozers gearbox design , its request for the transmission of simple structure, small size, light weight, reliable, easy to use. first determine the transmission gear box program, use mechanical human transmission, the five forward gears and four back block. Use of manpower shift mode. Then to determine the main parameters of transmission, through the design of the gear selection and intensity of state calculation, checking bearing life, and transmission line design. Keywords: bulldozers, mechanical transmission, the design 3 目 錄 一、推土機的傳動方案設計 ........................................................................................1 1.1 推土機傳動方案 ..................................................................................................1 1.2 變速箱的設計方案 ..............................................................................................2 1.3 傳動系統(tǒng)總傳動比 ..............................................................................................3 1.4.各部件傳動比的確定 ..........................................................................................3 二、變速箱主要參數(shù)的確定 ........................................................................................5 2.1 中心距的確定 ......................................................................................................5 2.2 齒輪模數(shù) ..............................................................................................................5 2.3 齒寬 B ...................................................................................................................6 2.4 選配齒數(shù) ..............................................................................................................7 三、齒輪設計 ..............................................................................................................11 3.1 齒輪強度計算 ....................................................................................................11 3.1.1 彎曲疲勞強度計算 ......................................................................................11 3.1.2 接觸疲勞強度計算 ......................................................................................14 3.2 齒輪材料、加工精度和結構形狀 ....................................................................16 四. 變速器軸設計與計算 ...........................................................................................18 4.1.軸的強度校核 ....................................................................................................18 4.1.1 軸的材料選擇 ..............................................................................................18 4.1.2 軸的結構設計 ..............................................................................................18 4.1.3 鍵聯(lián)接的強度校核 ......................................................................................18 4.1.4 計算支承反力彎矩及轉矩 ..........................................................................19 4.1.5 按彎扭合成應力校核軸的強度 ..................................................................19 4.1.6 精確校核軸的疲勞強度 ..............................................................................20 4.1.7．軸的靜強度校核： ...................................................................................21 4.2.軸的剛度校核計算 ............................................................................................21 4.2.1 軸的彎曲剛度校核計算： ..........................................................................22 4.3 軸的扭轉剛度校核計算 ....................................................................................23 4.4 花鍵的設計計算 ................................................................................................24 4 五、軸承的設計與壽命計算 ......................................................................................26 5.1 求兩端軸承受到的徑向載荷和 和 ......................................................271Fr2 5.2 求兩軸承的計算軸向力 和 .....................................................................27a2 5.3 對于使用滾針組分析 ........................................................................................28 六、變速器操縱元件設計 ..........................................................................................30 參考文獻 ......................................................................................................................31 致謝 ..............................................................................................................................32 齒輪和軸的介紹 ..........................................................................................................33