畢業(yè)論文-臺(tái)式電風(fēng)扇搖頭裝置設(shè)計(jì)-在線(xiàn)瀏覽
2024-08-02 10:30本頁(yè)面
【正文】 = 6 ???= ? 3 2l i mm i n2 ???????? ??HHhnEA SZZ ZZTKa ??= 3 25 265 ?????? ?????? =35mm(原參數(shù) 強(qiáng)度足夠） 計(jì)算傳動(dòng)的主要尺寸 中心距 ? ?2121 mzda ??= ? ? ?? =38mm 蝸桿的分度圓直徑 1d =28mm， 蝸桿齒頂圓直徑 aa hdd 211 ?? =28+2? =， 蝸桿 齒根圓直徑 ? ?chdd af ??? 211 = ? ? ??? =， 蝸桿軸向齒距 mpx ??1 = ?? =， 蝸桿輪齒螺紋部分長(zhǎng)度 12 21 ?? zmb = ??? =（取為 20mm）， 蝸輪分度圓直徑 22 mzd ? =? 30=48mm， 蝸輪齒頂圓直徑 aa hdd 222 ?? =48+2? =， 蝸輪齒根圓直徑 ? ?chdd af ??? 222 = ? ? ??? =， 蝸輪外圓直徑 mdd ae ?? =+? =， 蝸輪輪齒寬度 ???????? ????????????? ??? 12 mdmb =（取為 16mm） 蝸輪齒寬角 12arcsin2 db?? = 2816arcsin2 =? 第 12 頁(yè) 共 14 頁(yè) 彎曲強(qiáng)度驗(yàn)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(mǎn)足要求） 5．機(jī)構(gòu)參數(shù)計(jì)算 雙搖桿機(jī)構(gòu)設(shè)計(jì) 因?yàn)槭褂玫氖且赃B桿做主動(dòng)件的雙搖桿機(jī)構(gòu)，區(qū)別于日常的設(shè)計(jì)方法，所以，此次設(shè)計(jì)我們采用一種新的設(shè)計(jì)思路 —— 機(jī)架轉(zhuǎn)換法。然后轉(zhuǎn)換機(jī)架，將機(jī)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。 此設(shè)計(jì)，克服了連桿機(jī)構(gòu)以連桿為主動(dòng)件，連架桿為為從動(dòng)所產(chǎn)生的難題，通過(guò)轉(zhuǎn)換思路，等效運(yùn)動(dòng)規(guī)律，設(shè)計(jì)出理想的尺寸長(zhǎng)度。通過(guò) 1 周的學(xué)習(xí)，也讓我系統(tǒng)的復(fù)習(xí)了機(jī)械設(shè)計(jì)的相關(guān)知識(shí) ，同時(shí)也明白了要將理論知識(shí)和實(shí)踐相結(jié)合，這樣才能真正的掌握知識(shí)，提高自己的學(xué)習(xí)與實(shí)踐的能力。從 制定傳動(dòng)方案，合理選擇標(biāo)準(zhǔn)部件的類(lèi)型和型號(hào)到計(jì)算校核，這一切都是很好的學(xué)習(xí)過(guò)程?？偟脕?lái)說(shuō)，收獲很大。 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, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Au
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