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说明书1份，共30页，约10000字左右

 

CAD版本本图纸，共4张

 

 

摘 要

玉米脱粒机的设计是为了减少农民在对玉米脱粒时的劳动强度，提高生产率。随着我国玉米脱粒机被广泛的使用，对玉米脱粒机进行了研究，存在脱粒滚筒上的钉齿不能够更换致使钉齿的使用时间短的缺点，针对这种现象，采用以螺母固定钉齿的方法来替换焊接固定钉齿的方法，玉米脱粒机中主要的零件有入料口、钉齿滚筒、栅格式凹板和传动轴。本设计是根据脱粒机的工作原理进行整体结构设计，并通过AutoCAD绘图软件对各个零件的设计和绘制。从而设计出结构简单操作方便、使用寿

关键词：脱粒机 钉齿滚筒 栅格式凹板 钉齿 

目 录
前言·································································1
1玉米脱粒机的总体结构············································ 2
  1.1入料部分······················································2
  1.2脱粒部分······················································2
  1.3筛选部分·······················································2
  1.4机架部分·······················································2
2玉米脱粒机的设计···················································3
  2.1电动机的选择······································3
     2.1.1 电动机的功率············································ 3
     2.1.2电动机的转速·············································3
  2.2传动装置的设计·················································4
     2.2.1传动带的设计·············································5
     2.2.2V 带带轮的设计··········································8
  2.3传动轴的设计················································9
     2.3.1确定轴的各段直径和长度···································10
     2.3.2初步选择输出轴··············································11
     2.3.3确定输出轴上的圆角半径值································11
     2.3.4 轴的校核····················································11
     2.3.5轴的强度校核············································14
     2.3.6键强度的校核··········································15
 2.4钉齿条的设计················································16
     2.4.1 钉齿条的总体结构设计····································16
     2.4.2 钉齿条及钉齿的设计······································17
     2.4.3 钉齿的设计··············································17
  3 圆盘的设计··············································18
  4 栅格式凹板的设计············································19
  5 栅格托架的设计···············································19
  6 入料斗和进料口的设计··········································20
  7 上盖的设计······················································21
总结·······························································22
参考文献···························································23
致谢·························································· 24