【正文】 I 自動(dòng)核桃脫殼機(jī) 畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 目 錄 摘 要 ...................................................................................................................................I 1 前言 ................................................................................................................................ 1 2 緒論 ................................................................................................................................ 1 課題研究的目的和意義 ................................................................................................. 1 國(guó)內(nèi)外研究現(xiàn)狀 ............................................................................................................ 2 總體方案 ...................................................................................................................... 6 3 電動(dòng)機(jī)的選擇 .................................................................................................................. 8 4 破殼軸的帶及帶輪的設(shè)計(jì) ................................................................................................ 9 傳動(dòng)帶的設(shè)計(jì) ............................................................................................................... 9 確定計(jì) 算功率 ............................................................................................................. 9 選擇 V帶的型號(hào) ....................................................................................................... 10 確定帶輪的基準(zhǔn)直徑 ................................................................................................. 10 確定傳動(dòng)中心距 a 和帶長(zhǎng) L....................................................................................... 10 驗(yàn)算主動(dòng)輪上的包角 ..................................................................................................11 確定 V帶的根數(shù) ........................................................................................................11 確定帶的初拉力 ........................................................................................................ 12 求 V帶傳動(dòng)作用在軸上的壓力 .................................................................................. 12 V帶帶輪的設(shè)計(jì) ........................................................................................................... 12 帶輪的材料選擇 ........................................................................................................ 12 結(jié)構(gòu)設(shè)計(jì) .................................................................................................................. 12 從動(dòng)帶輪的設(shè)計(jì) ........................................................................................................ 13 5 撥料軸的帶及帶輪的設(shè)計(jì) .............................................................................................. 14 傳動(dòng)帶的設(shè)計(jì) ............................................................................................................. 14 確定計(jì)算功率 ........................................................................................................... 14 選擇 V帶的型號(hào) ....................................................................................................... 14 確定帶輪的基準(zhǔn)直徑 ................................................................................................. 14 確定傳動(dòng)中心距 a 和帶長(zhǎng) L....................................................................................... 15 驗(yàn)算主動(dòng)輪上的包角 ................................................................................................. 15 確定 V帶的根數(shù) ....................................................................................................... 16 確定帶的初拉力 ........................................................................................................ 16 II 求 V帶傳動(dòng)作用在軸上的壓力 .................................................................................. 17 V帶帶輪的設(shè)計(jì) ........................................................................................................... 17 帶輪的材料選擇 ........................................................................................................ 17 結(jié)構(gòu)設(shè)計(jì) .................................................................................................................. 17 從動(dòng)帶輪的設(shè)計(jì) ........................................................................................................ 18 6 破殼軸的設(shè)計(jì) ................................................................................................................ 19 軸上的功率 P、轉(zhuǎn)速 n、轉(zhuǎn)矩 T................................................................................... 19 初步確定軸的最小直徑 ............................................................................................... 19 軸的結(jié)構(gòu)設(shè)計(jì) ............................................................................................................. 20 擬定軸上零件的裝配方案 .......................................................................................... 20 確定軸的各段直徑和長(zhǎng)度 .......................................................................................... 20 軸上零件的軸向定位 ................................................................................................. 21 確定軸上圓角和倒角尺寸 .......................................................................................... 21 軸的潤(rùn)滑 .................................................................................................................. 21 軸上的載荷 ................................................................................................................. 21 精確校核軸的疲勞強(qiáng)度 ............................................................................................... 22 判斷危險(xiǎn)截面 ........................................................................................................... 22 校核截面Ⅳ 左側(cè) ........................................................................................................ 22 校核截面Ⅳ右側(cè) ........................................................................................................ 23 7 破殼軸軸承的校核 .................................................................................