【正文】 ...................... 12 精度選擇 ............................................................................................................... 13 材料選擇 ............................................................................................................... 13 齒數(shù)選擇 ............................................................................................................... 13 按齒面接觸疲勞強(qiáng)度設(shè)計(jì) .............................................................................................. 13 試算小齒輪分度圓直徑 ....................................................................................... 13 調(diào)整小齒輪分度圓直徑 ....................................................................................... 15 按齒根彎曲疲勞強(qiáng)度設(shè)計(jì) ............................................................................................. 17 試算小齒輪模數(shù) ................................................................................................... 17 調(diào)整齒輪模數(shù) ....................................................................................................... 18 幾何尺寸計(jì)算 ................................................................................................................. 21 計(jì)算分度圓直徑 ................................................................................................... 21 計(jì)算中心距 ........................................................................................................... 21 計(jì)算齒輪寬度 b .................................................................................................... 21 強(qiáng)度校核 ......................................................................................................................... 21 齒面接觸疲勞強(qiáng)度校核 ....................................................................................... 21 齒根彎曲疲勞強(qiáng)度校核 ....................................................................................... 22 齒輪參數(shù)計(jì)算 ................................................................................................................. 23 大齒輪圓周速度 v ................................................................................................ 23 確定檢驗(yàn)項(xiàng)目 ....................................................................................................... 23 確定最小側(cè)隙和計(jì)算齒厚偏差 ........................................................................... 23 確定公法線長(zhǎng)度偏差 bnsE 、 bniE ......................................................................... 24 公法線長(zhǎng)度 Wnk .................................................................................................... 24 結(jié)構(gòu)設(shè)計(jì)及繪制零件圖 ................................................................................................. 25 主要設(shè)計(jì)結(jié)論 .................................................................................................................. 25 5 低速級(jí)齒輪設(shè)計(jì) ....................................................................................................................... 25 選定齒輪類(lèi)型，精度等級(jí)，材料及齒數(shù) ..................................................................... 25 壓力角 ................................................................................................................... 25 精度選擇 ............................................................................................................... 26 材料選擇 ............................................................................................................... 26 齒數(shù)選擇 ............................................................................................................... 26 按齒面接觸疲勞強(qiáng)度設(shè)計(jì) .............................................................................................. 26 試算小齒輪分度圓直徑 ....................................................................................... 26 調(diào)整小齒輪分度圓直徑 ....................................................................................... 27 按 齒根彎曲疲勞強(qiáng)度設(shè)計(jì) ............................................................................................. 28 試算小齒輪模數(shù) ................................................................................................... 28 調(diào)整齒輪模數(shù) ....................................................................................................... 29 幾何尺寸計(jì)算 ................................................................................................................. 30 計(jì)算分度圓直徑 ................................................................................................... 30 計(jì)算中心距 ........................................................................................................... 30 計(jì)算齒輪寬度 b .................................................................................................... 31 圓整中心距后的強(qiáng)度校核 ............................................................................................. 31 分配變位系數(shù) ....................................................................................................... 31 齒面接觸疲勞強(qiáng)度校核 ....................................................................................... 32 齒根彎曲疲勞強(qiáng)度校核 ....................................................................................... 33 齒輪參數(shù)計(jì)算 ................................................................................................................. 34 大齒輪圓周速度 v ................................................................................................ 34 確定檢驗(yàn)項(xiàng)目 ....................................................................................................... 34 確定最小側(cè)隙和計(jì)算齒厚偏差 ........................................................................... 34 確定公法線長(zhǎng)度偏差 bnsE 、 bniE ......................................................................... 35 結(jié)構(gòu)設(shè)計(jì)及繪制零件圖 ................................................................................................. 35 主要設(shè)計(jì)結(jié)論 .................................................................................................................. 35 最終驗(yàn)算 ..................................