畢業(yè)論文-臺式電風(fēng)扇搖頭裝置設(shè)計(編輯修改稿)
2025-07-12 10:30 本頁面
【文章內(nèi)容簡介】 2arcsin2 db?? = 2816arcsin2 =? 第 12 頁 共 14 頁 彎曲強度驗算 齒形系數(shù)查表得， FY =，螺旋角系數(shù)?1401 ?? ??Y=??? = 極限彎曲應(yīng)力查表得， limF? =115MPa 許用彎曲應(yīng)力 ? ?minlimFFF S?? ? = =82MPa（取 minFS =） 彎曲應(yīng)力?? YYdmd TK FAF 21 ?=?YYdmd TK FA21 = 496 ???? ?? =82MPa（滿足要求） 5．機構(gòu)參數(shù)計算 雙搖桿機構(gòu)設(shè)計 因為使用的是以連桿做主動件的雙搖桿機構(gòu)，區(qū)別于日常的設(shè)計方法，所以，此次設(shè)計我們采用一種新的設(shè)計思路 —— 機架轉(zhuǎn)換法。 機架轉(zhuǎn)換法的理論依據(jù)如圖所 示，圖一中的 V1 是絕對速度， V2是機構(gòu)運動后，機架相對于搖桿的相對速度，此時 V1=V2。然后轉(zhuǎn)換機架，將機架轉(zhuǎn)換至圖一中的搖桿位置，現(xiàn)在同一位置處，設(shè)定圖二中的 V1=V2。這樣按照圖 2的機構(gòu)設(shè)計尺寸，所得的尺寸就是實際問題所需要的尺寸長度。 此設(shè)計，克服了連桿機構(gòu)以連桿為主動件，連架桿為為從動所產(chǎn)生的難題，通過轉(zhuǎn)換思路，等效運動規(guī)律，設(shè)計出理想的尺寸長度。 第 13 頁 共 14 頁 三、小結(jié) 經(jīng)過 1 周的機械設(shè)計課程設(shè)計，讓我認(rèn)識和了解到，機械設(shè)計必須認(rèn)真，細(xì)致，不能有任何的馬虎。通過 1 周的學(xué)習(xí)，也讓我系統(tǒng)的復(fù)習(xí)了機械設(shè)計的相關(guān)知識 ，同時也明白了要將理論知識和實踐相結(jié)合，這樣才能真正的掌握知識，提高自己的學(xué)習(xí)與實踐的能力。也通過一步一步的設(shè)計，明白了整個過程連接性，需要有個整體的規(guī)劃才能作好每步的分析，否則一步的脫節(jié)或者錯誤就直接導(dǎo)致走彎路，所作的無用功增加，耗時也隨之增加不少。從 制定傳動方案，合理選擇標(biāo)準(zhǔn)部件的類型和型號到計算校核，這一切都是很好的學(xué)習(xí)過程。也讓我的計算機、 AutoCAD 的綜合運用得到了很大的提高?？偟脕碚f，收獲很大。 四、參考文獻(xiàn) （ 1） 裘建新 . 機械原理課程設(shè)計指導(dǎo)書 . 北京 高等教育出版社 2021 （ 2） 申永勝 . 機械 原理教程（第 2版） . 北京 清華大學(xué)出版社 2021 （ 3） 孫恒 . 機械原理第七版 .高等教育出版社 請您刪除一下內(nèi)容， O(∩ _∩ )O謝謝！?。?Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese
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