【正文】
四川大學(xué)錦江學(xué)院畢業(yè)論文(設(shè)計(jì)) I 旋刀式草坪修剪機(jī)工作裝置設(shè)計(jì) 【摘 要】 本次設(shè)計(jì)的旋刀式草坪修剪機(jī)工作裝置結(jié)構(gòu)簡(jiǎn)單,價(jià)格比較便宜,使用保養(yǎng)較簡(jiǎn)便 .因而,在國(guó)際上得到了廣泛使用。 手推步行操作式旋刀式草坪修剪機(jī)一般由 4 個(gè)輪子支承著 .刀殼頂部安裝著刀殼上的動(dòng)力機(jī)的曲軸或輸出軸,軸的下端安裝旋刀修剪裝置 .機(jī)器的前進(jìn)可由動(dòng)力機(jī)經(jīng)傳動(dòng)裝置驅(qū)動(dòng),也可以由人力推動(dòng)。旋刀式草坪修剪機(jī)作業(yè)時(shí)可將廢除的草皮排在草地上,也可將廢除的草皮收集在集草器內(nèi)。 旋刀式草坪修剪機(jī)的旋刀裝置通常為長(zhǎng)方形,兩端有刃口和翼片 .一般工作的時(shí)候刀片割草,背后的翼 片可將刀殼內(nèi)部的空氣排出,這時(shí)候刀殼內(nèi)形成負(fù)壓 .當(dāng)草長(zhǎng)的較高,機(jī)器前進(jìn)時(shí),刀殼前端部會(huì)把草壓倒 。另外,刀殼外面的空氣進(jìn)入刀殼內(nèi)的同時(shí),可對(duì)倒伏的草起到提升的作用,這對(duì)于草長(zhǎng)得很茂盛并發(fā)生倒伏的情況有很好的針對(duì)作用。這樣機(jī)器一次通過后,就可將草坪修剪得比較整齊,因此,提高了工作效率。翼片形成的氣流可將刀刃切下的草屑懸浮到氣流中,經(jīng)刀殼氣道、排草口、排草通道排出,或收集起來 .氣流還可避免草屑在刀殼內(nèi)形成堵塞現(xiàn)象 .上述這種切割方式,按切割原理屬無支撐切割 .為了留下整齊的割茬,這就要求切割刀刃有一定的切割速度,這樣 莖葉才不會(huì)彎曲。如果由于莖桿剛度較大,而且草的莖桿粗一些,切割速度可以降低一些,但是一般不得低于26m/,一般切割速度達(dá)到 65m/s 完全可以滿足要求 .旋刀式草坪修剪機(jī)的配套動(dòng)力有電動(dòng)機(jī)和汽油機(jī)兩種。電纜供電的割草機(jī) (由電纜或蓄電池供電 )只能在小面積上使用 .而由蓄電他供電的割草機(jī),因機(jī)器重量較大,且蓄電池需經(jīng)常充電 (一般剪完 650mz 后需進(jìn)行充電 )。在小型割草機(jī)上 ( 下 )常采用電動(dòng)機(jī)作為配套動(dòng)力機(jī) .而在 上的割草機(jī)則多采用汽油機(jī)作為配套動(dòng)力機(jī)。本次采用汽 油機(jī)。 【關(guān)鍵詞】 旋轉(zhuǎn)式 草坪 割草機(jī) 手推 四川大學(xué)錦江學(xué)院畢業(yè)論文(設(shè)計(jì)) II Rotary lawn mower design of working device The design of the rotary lawn mower working device has the advantages of simple structure, cheap price, use and maintenance more convenient. Therefore, widely used in international. Hand walking operation type rotary lawn mower usually consists of4 wheels supported. A cutter mounted on the shell of the engine crankshaft or the output shaft vertically downward through the knife shell top, the lower end of the shaft mounted rotary cutter device. The machine advance is pushed by manpower, can also be controlled by the power transmission device to drive the operation of the machine: machine when the grass in the meadow grass, also can be collected in the set in the grass. Rotary lawn mower rotary cutter device is usually rectangular in shape, both ends of a cutting edge and fins. Operation blade mowing, blade knife can be shell from the air, then the tool casing to form the negative pressure. When the grass is higher, the machine moves forward, the lower edge of the knife shell may make the grass in front inverted。 in addition, when the grass was so long and lodging, the knife shell outside air into the knife shell at the same time, the lodging of grass to enhance the effect. This machine once through later, can be fairly neatly manicured lawns, therefore, improve the work efficiency. Besides, vane air flow formed the knife edge can be cut under the grass clippings suspended in a stream of air through the knife shell, airway, grass discharge, a grass discharge channel to discharge, or collected. The airflow can also avoid the grass clippings in the tool casing formed jam. The cutting means, according to cutting principle is no support requirements of cutting edge cutting. Has a certain cutting speed, cutting grass stems and leaves will not bend, leaving an uncluttered stubble. If the grass stems with rough, due to stem stiffness, the cutting speed can be lower, the general should not be less than 26m / S. For thin stem of lawn grass cutting speed should be high More generally, the cutting speed is up to 65m / s can pletely meet the requirements. Foreign rotary lawn mower accessory power motor ( by cable or battery powered ) and gasoline engine two. Based on convenience and safety reasons by cable powered mower only within a small area. By his power. Mower, because the machine weight is bigger, and the accumulator is frequently required to charge ( generally cut650mz need to charge ). So, in the small lawn mower ( ) often used as auxiliary power motor. In lawn mower is used as a matching engine gasoline engine. 【 Key words】 Rotary type Lawn Lawn mower Hand push 四川大學(xué)錦江學(xué)院畢業(yè)論文(設(shè)計(jì)) III 畢業(yè)設(shè)計(jì)(論文)原創(chuàng)性聲明和使用授權(quán)說明 原創(chuàng)性聲明 本人鄭重承諾:所呈交的畢業(yè)設(shè)計(jì)(論文),是我個(gè)人在指導(dǎo)教師的指導(dǎo)下進(jìn)行的研究工作及取得的成果。盡我所知,除文中特別加以標(biāo)注和致謝的地方外,不包含其他人或組織已經(jīng)發(fā)表或公布過的研究成果,也不包含我為獲得 及其它教育機(jī)構(gòu)的學(xué)位或?qū)W歷而使用過的材料。對(duì)本研究提供過幫助和做出過貢獻(xiàn)的個(gè)人或集體,均已在文中作了明確的說明并表示了謝意。 作 者 簽 名: 日 期: 指導(dǎo)教師簽名: 日 期: 使用授權(quán)說明 本人完全了解 大學(xué)關(guān)于收集、保存、使用畢業(yè)設(shè)計(jì)(論文)的規(guī)定,即:按照學(xué)校要求提交畢業(yè)設(shè)計(jì)(論文)的印刷本和電子版本;學(xué)校有權(quán)保存畢業(yè)設(shè)計(jì)(論文)的印刷本和電子版,并提供目錄檢索與閱覽服務(wù);學(xué)??梢圆捎糜坝 ⒖s印、數(shù)字化或其它復(fù)制手段保存論文;在不以贏利為目的前提下,學(xué)??梢怨颊撐牡牟糠只蛉?jī)?nèi)容。 作者簽名: 日 期: 四川大學(xué)錦江學(xué)院畢業(yè)論文(設(shè)計(jì)) IV 目錄 1 緒論 ................................................................................................. 1 草坪修剪機(jī)機(jī)的發(fā)展歷史 ......................................................... 1 存在問題 ................................................................................... 1 2 割草機(jī)概述 ......................................................................................... 2 割草機(jī)的分類 ......................................