【正文】 于孔的倒角的要求。轉(zhuǎn)動軸以[σ]1為許用應(yīng)力[σe]=70 N/mm178。棘輪的材料選為Q235由表8622齒數(shù)取為20(1)棘輪模數(shù)按齒受彎曲計算確定mM：所傳遞的力矩M=348758NmmC= =B：棘輪的寬度C：1~2[σw]：棘輪的許用彎曲應(yīng)力m 取m=10mm(2)棘輪模數(shù)按齒受擠壓進行驗算[p]許用單位線壓力, [P]=35N/m2 滿足強度要求 軸的設(shè)計從高速到低速各軸命名為Ⅰ軸、Ⅱ軸、Ⅲ軸。棘輪的齒形已經(jīng)標準化，周節(jié)t根據(jù)齒頂圓來考慮，步數(shù)越多，沖擊越小，但尺寸越大。小齒輪數(shù)Z1在推薦值20~40中選取21大齒輪數(shù)Z2：Z2=Z1i=21= 取Z2=125齒數(shù)比μ： μ==傳動比誤差Δμ：Δμ= =﹤(2)齒根彎曲疲勞強度設(shè)計計算由式得MT1：小輪轉(zhuǎn)矩ψd：齒寬系數(shù) ψd=K：載荷系數(shù) K=KAKνKβKα ：使用系數(shù) KA=1：：齒向載荷分布系數(shù) =Kα：齒間載荷分配系數(shù) Kα=則載荷初值 Kt=1=：應(yīng)力修正系數(shù) ：齒形系數(shù) ：重合度由式=[（1/Z1+1/Z2）] =[(+)]==++==：彎曲疲勞極限，=920=644Mpa=760=532Mpa：YST：試驗齒輪應(yīng)力修正系數(shù)2YN：彎曲壽命系數(shù) 按每天工作8小時，每年300天，預期壽命10年計算：N1=60n1j =6030001103008=109N2= = 109／=108=21=920Mpa=21=760Mpa則 ====小齒輪的大，按小齒輪估算：=按表 ~2，取m=2mm(3)驗算齒面接觸疲勞強度σH=ZHZεZE小輪圓周速率：V===Kv：動載荷系數(shù) 由 νZ1／100= = K：載荷系數(shù) K= =ZH：節(jié)點區(qū)域系數(shù) Zε：重合度系數(shù) 由 Zε==大齒輪齒寬 b=ψdd1=42=21mm為了保證足夠的齒寬接觸,補償軸向安裝誤差,大齒輪齒寬 b1=b+(5~10) =28mmZE：彈性系數(shù) N/mm2 [σH]：許用接觸應(yīng)力 [σH]=σHlimZNZW/SHlimZW：硬化系數(shù)均勻硬齒面 1SHlim：接觸最小安全系數(shù) 1σHlim：接觸疲勞極限 [σH]1= =1480Mpa[σH]2= =1200Mpa故 σH= =945Mpa1200Mpa合格(4)尺寸計算（主要幾何尺寸）小輪分度圓直徑 d1=mZ1=221=42mm大輪分度圓直徑 d=mZ=2125=250mm根圓直徑 df1=d1－m=42－2=37mmdf2=d1－m=250－2=245mm中心距 a = (d1+d2)=(42+250) =146mmⅡ級齒輪傳動設(shè)計(1)齒輪材料、熱處理、齒面硬度、精度等級及齒數(shù)本設(shè)計采用硬齒面小齒輪40Cr 調(diào)質(zhì)及表面淬火HRC=59大齒輪45鋼 調(diào)質(zhì)及表面淬火HRC=52由于采用淬火，輪齒變形小，不易摩削，所以采用8級精度。由于配對小齒輪齒根薄弱，彎曲應(yīng)力也較大，且應(yīng)力循環(huán)次數(shù)多，所以小齒輪的強度比大齒輪的硬度高些。 i1= 傳動裝置的運動參數(shù)計算從減速器的高速軸開始各軸命名為Ⅰ軸、Ⅱ軸、Ⅲ軸。(1)總傳動比:已知馬達轉(zhuǎn)速及卷筒轉(zhuǎn)速，所以總傳動比為i===(2)傳動比分配:傳動比分配的合理，傳動系統(tǒng)結(jié)構(gòu)緊湊、重量輕、成本低，潤滑條件好。σs=230N/mm2σ1=2=128N/mm合格起升結(jié)構(gòu)的減速器傳動采用一級懸掛閉式減速器與一級開式齒輪傳動相結(jié)合。：其名義直徑是繩槽底的直徑D1=hdd：鋼絲繩直徑10mmh：與機構(gòu)工作級別和鋼絲繩結(jié)構(gòu)有關(guān)，查表h=16D1=1610=160mmL=n：卷繞層數(shù)N=5a：滑輪組倍率a=6D：卷筒直徑160mmH：起升高度10mmD：鋼絲繩直徑10mmL==本卷筒為鋼卷筒ZG230450，可由經(jīng)驗公式確定δ≈d，考慮到工藝要求， 取=15mm最大拉力為Smax的鋼絲繩繞上卷筒后，把卷筒箍緊，使卷筒產(chǎn)生壓縮、彎曲和扭轉(zhuǎn)應(yīng)力，其中壓縮應(yīng)力最大，當L3D時，彎曲和扭轉(zhuǎn)的合成應(yīng)力不超過壓縮應(yīng)力的30%，因此彎曲和扭轉(zhuǎn)應(yīng)力可忽略。采用尺寸較小的多層繞卷筒對少機構(gòu)尺寸是很有利的。隨著起升高度的增加。的推力軸承P0a=Fa=63000NC0=26300=126KN﹤Coa合格只受彎矩，不受轉(zhuǎn)矩的心軸，采用45鋼R==31500NMc=Ra=31500=23310NmW=a為 ： ==W= (1－)=164533σ= = =178。吊鉤橫梁的軸端與定軸擋板相配處形成環(huán)形槽，容許橫梁轉(zhuǎn)動。采用長型號鉤組，吊鉤支承在單獨的滑輪軸上。本吊鉤采用DG20Mn。本設(shè)計取繩槽兩側(cè)面夾角2β=35~45取γ0=5；2β= 45平衡滑輪直徑Dp=170mm采用45鋼，滑輪組工作時只承受彎矩，是心軸。D（h－1）dd：鋼絲繩直徑,d=10mmh：與機構(gòu)工作級別和鋼絲繩有關(guān)的系數(shù)取18D（18－1）10=170mm采用繩槽斷面－ 繩最大偏角γ0鋼絲繩進出滑輪繩槽的偏斜角不能過大，否則會增加鋼絲繩阻力，加快鋼絲繩和滑輪的磨損，嚴重時，還可能使鋼絲繩跳槽。如圖所示單聯(lián)滑輪組展開的情況。本設(shè)計采用楔形套筒法，查取選用：楔 10GB597386 HT200楔套 10GB597386 ZG200楔形接頭 10GB597386 ZG270500采用HT150，工藝性好，易于加工、價廉，對鋼絲繩壽命有利。設(shè)計規(guī)范規(guī)定，可按鋼絲繩在工作狀態(tài)下的最大靜拉力計算，其公式為：d = c d：鋼絲繩最小直徑mmc：選擇系數(shù)。卷筒的正反向轉(zhuǎn)動是通過改變馬達的轉(zhuǎn)向達到的，而機構(gòu)運動的停止或使貨物保持在懸吊狀態(tài)是依靠棘輪停止器來實現(xiàn)的?；剞D(zhuǎn)支承 Abstract Mounted Crane (abbreviation TMC) belongs to boomCrane .It bines the advantages .So it can greatly decrease labor intensity, increase working I use flexible boom in TMC for the first time and have a optimization design. This product has features of pact structure, easy operation. It is suitable for wide use in traffic transportantion,dock warehouse and all smallsized industries for goods loading loading and unloading and long distance transportation. Its main content includes the following aspects:The design for winch mechanism The winch mechanism consists of hydraulic motor, reducer, ratchet wheel stop and winch lowers the speed of hydraulic motor for driving the winch drum to wind or unwind the load hoisting wire rope. When working, the motor drives reducer and bring along winch drum rotation, then the wire rope is wound or unwound ,the load will be lift or lowered through pulley block system. Lifting or lowering of the load will be controlled by the rotation direction of the motor. Ratchet wheel stop is used to stop the motion of the drum, holding the load in the air.The design of boom The boom adopts flexible type and boxshaped bodies are fitted on the boom. There are slide supports at outsides of every section of booms. The working range of TMC can outsides of every are fitted on the are slide supports at outsides of every section of booms. The working range of TMC can be realized by the extension or retraction of cylinder body. It uses different steel products in different positions for decrcasing boom’s weight and fully developing steel products’ function.The design of swing