机械5

番茄苗期株间除草机结构设计与分析 摘要 为了保护环境，促进自动化农业和绿色可持续发展，本文设计了一种适用于番茄苗期的株间除草机。本文在对国内外除草机械研究现状分析的基础上，根据田间除草的任务要求，提出了除草机的整体设计方案。株间除草机大体包括移动平台和除草机构两部分。重点设计移动平台的传动系统与转向机构，通过对除草过程进行作业分析确定移动平台采用逐行往返式作业模式，为实现在农田间稳步向前行走设计一套传动系统，为解决除草设备在农田间的转向问题设计一套梯形转向结构。根据植株行距株距、幼苗高度等确定自走式车辆本体的主要技术参数，通过理论分析确定转向机构的结构参数。为实现精准化除草作业，采用Delta并联机构作为主要除草部件，保证除草精度。通过对并联机构进行运动学分析，确定其主要尺寸参数，再对执行器末端进行空间模拟验证其参数是否满足除草作业要求。 关键词：株间除草；并联机构；梯形转向机构 中文摘要 英文摘要 Structure Desig
n a
nd A
nalysis of I
nterpla
nt Weedi
ng Machi
ne i
n Tomato Seedli
ng Stage Abstract I
n order to protect the e
nviro
nme
nt, promote automated agriculture a
nd gree
n sustai
nable developme
nt, this paper desig
ns a
n i
nterpla
nt weeder suitable for tomato seedli
ngs. Based o
n the a
nalysis of the research status of weedi
ng machi
nery at home a
nd abroad, this paper puts forward the overall desig
n pla
n of the weedi
ng machi
ne accordi
ng to the task requireme
nts of field weedi
ng. The i
nter-pla
nt weeder ge
nerally i
ncludes two parts: a mobile platform a
nd a weedi
ng mecha
nism. Focus o
n the desig
n of the tra
nsmissio
n system a
nd steeri
ng mecha
nism of the mobile platform. Through the operatio
n a
nalysis of the weedi
ng process, it is determi
ned that the mobile platform adopts a row-by-row reciprocati
ng operatio
n mode. A tra
nsmissio
n system is desig
ned to achieve steady progress i
n the farmla
nd, a
nd to solve the problem of the weedi
ng equipme
nt i
n the farmla
nd. Desig
n a set of trapezoidal steeri
ng structure. The mai
n tech
nical parameters of the self-propelled vehicle body are determi
ned accordi
ng to the pla
nt row spaci
ng, seedli
ng height, etc., a
nd the structural parameters of the steeri
ng mecha
nism are determi
ned through theoretical a
nalysis. I
n order to achieve precise weedi
ng operatio
ns, the Delta parallel mecha
nism is used as the mai
n weedi
ng compo
ne
nt to e
nsure the accuracy of weedi
ng. Through the ki
nematic a
nalysis of the parallel mecha
nism, the size parameters of the parallel mecha
nism are determi
ned, a
nd the
n the space simulatio
n of the e
nd of the actuator is performed to verify whether the parameters meet the requireme
nts of the weedi
ng operatio
n. Key words: weedi
ng amo
ng pla
nts; Parallel mecha
nism; Trapezoidal steeri
ng mecha
nism 目录 1绪论1 1.1研究背景及意义1 1.2国外研究现状2 1.3国内研究现状4 1.4现状分析6 2技术任务书7 2.1研究内容7 2.2技术路线8 3总体设计方案9 3.1移动方式的选择9 3.2传动系统设计10 3.3除草机构的选择12 4转向系统设计13 4.1转向方案的确定13 4.2转向梯形参数的确定14 4.3步进电机的选择15 4.4齿轮齿条的计算16 5.并联机构设计及空间分析25 5.1并联机构设计25 5.2空间分析28 5.3末端执行装置29 6总结与展望30 6.1结论30 6.2创新点30 6.3展望30 参考文献31 致谢33