【正文】 long poles double jaw plate. Revised the key parameters of grab design that based on the experience in the past ,and improve the grasping force of 20% more than the original plan. According to the data after the optimization, draw a grab main ponents, such as upper and lower beam, the bucket body, balance, poles of engineering drawing and assembly drawing. Key Words: Grab, Parameter, Model, C language 長撐桿雙瓣四索抓斗的結(jié)構(gòu)設(shè)計與優(yōu)化 III 目 錄 ......................................................................................................................................... 1 抓斗的概述 ................................................................................................................... 1 國內(nèi)外的研究現(xiàn)狀 ....................................................................................................... 2 國外研究現(xiàn)狀 ..................................................................................................... 2 國內(nèi)研究現(xiàn)狀 ..................................................................................................... 2 ..................................................................................................................... 4 抓斗的結(jié)構(gòu)組成 ........................................................................................................... 4 抓斗的工作原理 ........................................................................................................... 4 抓斗的方案制定 ........................................................................................................... 6 3．抓斗的總體設(shè)計 .................................................................................................................. 7 抓斗自重的確定及其分配 ........................................................................................... 7 確定抓斗的顎板寬度 B 和最大開度 Lm ................................................................... 8 顎板寬度 B 的確定 ............................................................................................ 8 最大開度 Lm 的確定 ......................................................................................... 9 抓斗的其他幾何參數(shù) ................................................................................................... 9 確定顎板的側(cè)面形狀和尺寸 ..................................................................................... 10 顎板的底倍角 ................................................................................................... 10 顎板側(cè)板的上緣邊線與水平線夾角 ? ........................................................... 10 顎板側(cè)板的面積 ............................................................................................... 10 側(cè)板形狀作圖 ................................................................................................... 10 確定開閉滑輪組倍率 ................................................................................................. 12 選擇鋼絲繩 ................................................................................................................. 12 確定并繪制抓斗總體結(jié)構(gòu)尺寸的簡圖（閉合狀態(tài)和張開狀態(tài)） ......................... 13 運動學(xué)分析 ................................................................................................................. 15 主要參數(shù)匯總 ............................................................................................................. 16 4．抓斗主要部件的結(jié)構(gòu)設(shè)計 ................................................................................................ 17 撐桿的結(jié)構(gòu)設(shè)計 ......................................................................................................... 17 強度計算 ........................................................................................................... 17 撐桿鉸與軸套驗算 ........................................................................................... 19 斗體的結(jié)構(gòu)設(shè)計 ......................................................................................................... 19 水平刃口板厚度 ............................................................................................... 20 斗底板厚度 ....................................................................................................... 20 水平刃口板寬度 ............................................................................................... 21 長撐桿雙瓣四索抓斗的結(jié)構(gòu)設(shè)計與優(yōu)化 IV 大彎板 ............................................................................................................... 21 斗體面板的強度驗算 ....................................................................................... 22 上承梁的設(shè)計與強度校核 ......................................................................................... 23 滑輪組設(shè)計 ....................................................................................................... 23 軸承的選擇固定及壽命計算 ........................................................................... 25 軸的計算 .......................................................................................................... 26 銷軸的選擇及強度計算 ................................................................................... 29 下承梁的設(shè)計 ................................................................................................... 30 抓斗 三維模型的建立 ................................................................................................. 31 上承梁 ............................................................................................................... 31 下承梁 ............................................................................................................... 31 平衡架 ............................................................................................................... 33 撐桿 ................................................................................................................... 33 斗體 ................................................................................................................... 34 抓斗的總裝 ............................................................................