【正文】 G20Mn。隨著起升高度的增加。(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。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。根據(jù)安裝分析，軸處于如下位置時最危險。(1)起重臂基本尺寸根據(jù)起升高度H和工作幅度R，并參考現(xiàn)有起重機的相關(guān)尺寸，初步估計出臂的基本尺寸如下 基本臂 3170 mm 二節(jié)臂 3025 mm 三節(jié)臂 2940 mm 總臂 3360(7900) mm表1 起重臂基本工況組合工況 L(mm)R(mm)Q(kg)i133602100630062336031604000635680 26005000645680 54802500657900 21003000667900 790015006其中：L：各種工況下的臂長R：各種工況下的工作幅度Q：起重量（包括吊鉤、吊具重量）i：起升滑輪倍率(2) 起重臂材料性能參數(shù)其它參數(shù)的選擇臂的不同部位可采用不同強度的鋼材，以減輕吊臂自重，充分發(fā)揮鋼材的作用。由于低速大扭矩液壓馬達成本高，使用可靠性不如高速液壓馬達，采用高速液壓馬達也可以采用結(jié)構(gòu)緊湊、傳動比大的蝸輪轉(zhuǎn)動。G1 =+－=其中：Lb:主臂重心到回轉(zhuǎn)中心線距離 取Lb=Lw－C1=－=LW:θ：主臂仰角0C1：L上:(3) 偏心距為e=M/GP==(4) 考慮風力時最大工作載荷GP=Q+Gb+G1=2500+410+290=3200kgM=Qr+ GbLb+Hh－G1L1=++－=(5) 靜態(tài)： Fa’==M’==動態(tài)： Fa’==M’==Z=94，m=8,調(diào)質(zhì)后齒輪圓周力F=104 N(1)回轉(zhuǎn)支承裝置的摩擦阻力矩力計算MfM1=ΣN從一個學生轉(zhuǎn)化為一個單位人，在思想的層面上，必須認識到二者的社會角色之間存在著較大的差異。3. 毅力的考驗，越挫越勇。最好是一項一項的檢查：圖、表、公式、字體、行距、對齊。至此，再謝！ 45 / 45。致 謝經(jīng)過近四個月的忙碌和工作，本次畢業(yè)設計已經(jīng)接近尾聲，由于經(jīng)驗的匱乏，及專業(yè)知識的部分空缺，造成設計中許多考慮不周全的地方，如果沒有老師的督促指導，以及一起工作的同學們的支持，想要完成這個設計任務是非常艱巨的。需要堅持，需要有顆平常心。論文完成的有點倉促，在決定定稿后，仍覺得有做的不好的地方，對于論文能不能最后通過，我心里也沒底，下面來對畢設總結(jié)一下：1. 總體規(guī)劃，快速入題。Do/ZDo:ΣN=GPeKe/DO=3450Mf=(2)回轉(zhuǎn)平臺傾斜引起的阻力矩Ms=Qrsina=sin3==7170Nm(3)慣性回轉(zhuǎn)阻力矩Mp=[Gb液壓驅(qū)動的小起重量起重機，通過液壓回路和換向閥的合適機能，可以使回轉(zhuǎn)機構(gòu)不裝制動器，同時保證回轉(zhuǎn)部分在任意位置上停住，并避免沖擊。H=表6 起升高度計算結(jié)果(mm)回轉(zhuǎn)臂長幅度——————————————3 回轉(zhuǎn)結(jié)構(gòu)的設計本回轉(zhuǎn)機構(gòu)采用液壓馬達驅(qū)動。為了提高產(chǎn)品的競爭力，吊臂截面的選擇與外觀均要合理。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 軸的設計從高速到低速各軸命名為Ⅰ軸、Ⅱ軸、Ⅲ軸。 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。采用尺寸較小的多層繞卷筒對少機構(gòu)尺寸是很有利的。采用長型號鉤組，吊鉤支承在單獨的滑輪軸上。如圖所示單聯(lián)滑輪組展開的情況?；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 mechanism Swing mechanism contains swing bearing and swing driver, the same is, nooil lubricated bearings, wormandwheel steering gear and gydraulic motor. This structure has the advantages of light weight, reliable force on it and smooth action. It can make the load transported in the horizontal plane.Key words TruckMounted Crane ；winch mechanism；Boom ；swing mechanism；Swing bearing 目 錄1 起升機構(gòu)的設計……………………………………………………………1 起升機構(gòu)的基本參數(shù)計算…………………………………………1 ……………………………………………………1 ……………………………………………1 鋼絲繩的設計與選用 ……………………………………………3 滑輪及滑輪組設計 ………………………………………………4 選材與材料…………………………………………………4 滑輪直徑D …………………………………………………5 繩最大偏角…………………………………………………5 滑輪軸設計…………………………………………………5 滑輪軸承的設計與校核……………………………………6 吊鉤的設計與選用 ……………………