【正文】 to the relevant mechanical design software to plete parts design. In line with from the point of view of economy and practicability, according to the needs of the development of agriculture designed a kind of simple structure, high efficiency of the corn threshers. First should according to their own shape of corn dish on the preliminary design, and operate the overall scheme of the transmission design. The main contents include corn threshing institutions, basic motor selection, with the structure design of the wheel. General mechanical design method, usually from the overall scheme started, the overall scheme and the analysis of the first from the agency began, determine the scheme more necessary design calculation and structure design, and finally to plete equipment drawings and design calculations as the whole design calculation results. In order to reduce the farmer labor intensity, improve agricultural mechanization of homework, fill a gap of agricultural machinery, aiming at the characteristics of the corn disk itself design, when the threshing nail tooth roller highspeed, make the corn in case wall constantly was nailed tooth between blow, but the effect and the cob collision between that constantly, in order to achieve the seed dish separate, then grain, plete the threshing. Key words: corn separating thrasher。一般機械設計方法，通常多從總體方案開始，在總體方案中又首先從機構的分析開始，確定方案后再進行必要的設計計算和結(jié)構設計，最后以完成的設備圖紙和設計計算書作為整個設計計算的成果。首先應該根據(jù)玉米盤的自身形狀來展開初步設計，從而展開總體方案的傳動設計。 1 題目 玉米脫粒機動力系統(tǒng)的設計 姓 名 ： 某 某 某 所在學院 ： xxxxxxxx 學院 所學專業(yè) ： 機電一體化工程 班 級 08 機電 1班 學 號 202202202223 指導教師 ： _____ _______ 完成時間 ： ____ _____ 2 摘 要 本設計基于各種脫粒機的結(jié)構，主要研究玉米脫粒 機的傳動系統(tǒng)的結(jié)構、工作原理，并在此依據(jù)基礎上完成零部件的設計，并依據(jù)相關機械設計軟件來完成零部件的設計。本著從經(jīng)濟性和實用性的角度出發(fā)，針對農(nóng)業(yè)發(fā)展的需要設計出一種結(jié)構簡單，工作效率高的玉米脫粒機。 研究的主要內(nèi)容基本包括玉米脫粒機構、電機的選擇、帶輪的結(jié)構設計。 為了減輕農(nóng)民的勞動強度，提高農(nóng)業(yè)作業(yè)的機械化程度，填補農(nóng)業(yè)機械的一項空白，針對玉米盤本身特征進行設計，在脫粒時釘齒滾筒高速旋轉(zhuǎn)，使玉米在機箱壁和羅底之間不斷被釘齒打擊，而這個作用又使玉米棒之間不斷互相碰撞，以達到籽盤分離，然后凈粒，完成脫粒。 Nail tooth roller。 Belt round 4 目 錄 緒論 ………………… ..………………… ................................…..... .........................................1 ……… ..……………………………… ........................……………… ..1 ……………………………………………… .....................…… ...………… ....1 ………………… ...…………… ...........……………… ..… ................................1 玉米脫粒機總體設計方案 …………………………… ......… ...............................… ...........… 2 ……………………………… ....................................................................2 確定 ……………………… .............…………… ........................................3 …………………………………………… .....…………… ...............................3 ………………………………………………… .… ................................3 電動機的選擇 …………………………… .......................……… ..… ...……… .……… ...........4 ……………………………………………… ...........................… .............4 … .....................……………………………… .....………… .…… .....5 ………………… .....................…………………… ...……… .… .… ..… 5 帶輪與傳動帶的設計 ............……………… .....................…… ...........……… .....… ...........… 6 … .....................……………… ...............…… ..........……… ......… ..… ..6 ……………… ........................................… ............................................6 .................................................................................................6 .………..…. .................................................................................7 ……… ...................................................................……… ..…… .… .…. ....8 軸的設計 ……………………………… ...................…… .…………… ...……… .… ...............11 …………………… .....................… .…… .........……………... ................11 ………………… .....................…………… ........…… .......… .… .....11 位的要求確定軸的各段直徑和長度 ..............................................…....…1 2 初步選擇輸出軸系 ........................................................................................................12 r 值 .......................................................................................13 ......................................................................................13 ...........................................................................................................13 求輸出軸上的所受作用力的大小 .....................................................................13 ...................................................................................................13 ...........................................................................13 ...............................................................................14 作彎矩圖 .............................................................................................................14 ..............................................................................................................15 （彎矩、扭矩合成圖） ..............................................................15 校核軸的 強度 ................................................................................................................15 ..................................................................................................................16 釘齒滾筒的設計 ………… …… ...................…… .....…………………… .....……… .............17 ……… .....................…… .........………………… .......… .… ....17 …………… .....................…… ..........…………… ..........… .........17 .....…………… .................................................................................17 圓盤的設計 ….........………… .....................…....... .....................................................18 玉米脫粒機的安全操作 ..........................................................................................................19 ,機械“爆炸” ……… .....................……… ....… .........…… ..................…… 19 5 …………