【正文】 ....................................................................... 5 割草機的組成 ................................................................................................ 5 割草機的分類 ................................................................................................ 5 割草機的發(fā)展方向 ................................................................................................ 9 本設(shè)計的目的、要求和意義 ................................................................................ 10 2 雙圓盤割草機總體設(shè)計 ............................................. 11 本設(shè)計需要解決的技術(shù)問題 ............................................................................... 11 收獲對象對機械性能的要求 ................................................................................ 11 總體設(shè)計原則 ...................................................................................................... 11 要求達到的技術(shù)參數(shù) ........................................................................................... 11 總體參數(shù)的確定 .................................................................................................. 12 總體方案的確定 .................................................................................................. 12 3 旋轉(zhuǎn)式切割器的設(shè)計 ............................................... 15 割刀運動分析 ...................................................................................................... 15 割刀轉(zhuǎn)速的確定 .................................................................................................. 16 刀片數(shù)的確定 ...................................................................................................... 16 刀片伸出高度 h ................................................................................................... 17 切割器主體部分設(shè)計 ........................................................................................... 17 4 主要工作部件的方案選擇及相關(guān) 參數(shù)的確定 ........................... 19 傳動系統(tǒng)總體方案的確定 ................................................................................... 19 動力參數(shù)設(shè)計 ...................................................................................................... 19 傳動比分配 .................................................................................................. 19 功率消耗 ..................................................................................................... 20 帶傳動設(shè)計 ................................................................................................ 21 錐齒輪傳動設(shè)計 .......................................................................................... 22 軸的設(shè)計 ..................................................................................................... 23 四連桿掛接機構(gòu)設(shè)計 .......................................................................................... 26 本科機械畢業(yè)設(shè)計論文 CAD 圖紙 401339828 4 總結(jié) ............................................................... 29 參考文獻 ........................................................... 30 外文文獻 ........................................................... 31 致謝 ............................................................... 37 本科機械畢業(yè)設(shè)計論文 CAD 圖紙 401339828 5 1 割草機相關(guān)背景 生存環(huán)境和經(jīng)濟發(fā)展是我國可持續(xù)發(fā)展的重要戰(zhàn)略，而草業(yè)的發(fā)展在其中起著至關(guān)重要的作用。 本次設(shè)計主要完成了圓盤式割草機的總體方案的選型，切割器的總體設(shè)計，傳動系統(tǒng)的設(shè)計，主要零部件的設(shè)計與校核。 三、動力由拖拉機飛輪傳遞，機具皮帶輪布置在兩個齒輪箱中間，兩個皮帶輪處在同一個平面內(nèi)，結(jié)構(gòu)更緊湊 。設(shè)計的雙圓盤割草機有以下幾個特點 : 一、該機具由小四輪拖拉機前懸掛作業(yè)，主要有掛接、升降、傳動、切割等機構(gòu)組成， 設(shè)計簡單，結(jié)構(gòu)緊湊 ?；剞D(zhuǎn)式切割機屬無支承切割，不產(chǎn)生堵塞現(xiàn)象，更換刀片簡易。本科機械畢業(yè)設(shè)計論文 CAD 圖紙 401339828 1 圓盤式割草機的設(shè)計 摘 要 牧草收割是草產(chǎn)業(yè)生產(chǎn)中的一個重要環(huán)節(jié)，提高牧草收割機械化水平和生產(chǎn)率，對于確保草產(chǎn)業(yè)豐收極為重要。切割器是各種牧草收割機械的重要工作部件，目前，各種牧草收割機械普遍采用的切割器有往復(fù)式和回轉(zhuǎn)式兩種。 本次設(shè)計的雙圓盤式割草機，選用回轉(zhuǎn)式切割器，對牧草的適應(yīng)性強，特別適應(yīng)于稠密、倒伏和纏連的牧草，工作平穩(wěn)，生產(chǎn)率高。 二、本機具的升降由拖拉機液壓手柄操縱，通過升臂、鋼絲繩、滑輪等機構(gòu)提升拉桿，完成機具的水平升降 。 四、機具前端設(shè)置了防護欄和防護罩，刀盤制作成碟形，使刀片旋轉(zhuǎn)時與地面成一定角度，且脫落或飛出時不致傷人，安全可靠。 關(guān)鍵詞 :圓盤切割器；牧草；收割機 本科機械畢業(yè)設(shè)計論文 CAD 圖紙 401339828 2 Design of double— disk cutter with rotary cutter Abstract Grazing harvesting is an important Part of the Production of grass industry, improving forage harvesting mechanization level and Productivity is vital to ensure the grass industry abundant harvest. The cutter is important working Part of various harvesting machinery. At Present， various forage harvesting machinery monly use two kinds of cutter bar reciprocating and rotary. The rotary cutting machine without support cutting and there is no Plugging Phenomenon and replacing blade easily. This topic researches and designs double— disk cutter with rotary cutter, the adaptability of forage, particularly adapted to the dense, lodging and even wrapped around the grass， working stably, output highly. In this paper, researches and analyses foreign forage grasses harvester, using the principle and method of machine design ,the optimal design of machine， the development of the double disk grass cutter has innovation spots as following: 1. The machine with a small fourwheel tractor hanging before it. Mainly including the of hoist、 articulate、 movement、 transmission、 cutting and other agencies with simple design、 pact structure、 strong adaptability and low cost. of the machine is controlled by hydraulic handle of the tractor, through the liftingarm， steel rope, Pulley and so on achieving the lifting horizontally. 3. Power transmission depends on the flywheel of the tractor. There two strap Pulleys between the two gearboxes, and the two straps Pulleys are Placed on the same Plane with more pact structure. are fencing and Protective mask at the foreside of the machine, and the blade was made into the shape as dish so that the blade rotating at a certain angle on the ground,and fly safely and reliably off without wounding. In this Paper analysis’s and tests the force of the Principal transmission Parts. By doing Experiments, we know the machine has the characteristics of strong applicability、 reasonable structure、 excel