机械5

城市绿地割草机设计 摘要 本课题设计了一种由小型汽油机带动刀片旋转运动，人工推动机具前进完成作业的割草机。 设计的割草机组成部分主要有：旋刀，集草袋，传动机构，发动机和机壳支撑座等。拟采用发动机XY168F，这款发动机的最大功率为：5.5HP/3600rpm。 工作装置则是运用割草刀装在发动机输出轴上，通过高速旋转切割草茎。将割草刀的非刃口做成风机叶片，割草作业时将草吹成直立状态，便于切割并与罩壳形成涡流将碎草送入集草装置--集草袋。护罩为涡流形状的草坪修剪机的支架也是冲压件，用于保护操作者和行人安全，并给切下物导向。 行走装置则是由割草机调高装置和行走轮组成。通过手柄另行走轮相对割草机的护罩进行调节，轮子降低时，割草刀下降，则割草高度上升；反之亦然。 关键词：割草机；刀具；罩壳；传动轴 Desig
n of law
n mower i
n urba
n gree
n space Abstract This paper desig
ns a ki
nd of law
n mowerwhich is drive
n by a small gasoli
ne e
ngi
ne to drive the blade. The desig
n of the law
n mower compo
ne
nts mai
nly i
nclude: rotary k
nife, collecti
ng straw bag, tra
nsmissio
n mecha
nism, e
ngi
ne a
nd chassis support. The e
ngi
ne XY168F is to be used, the maximum power of this e
ngi
ne is: 5.5HP/3600rpm. Theworki
ng device USES a mowi
ng k
nife to be mou
nted o
n the e
ngi
ne's output shaft, cutti
ng the stalk through high speed. The blade of the blade is made i
nto a fa
n blade, a
nd the grass is blow
n i
nto a
n upright positio
nwhe
n mowi
ng the grass,which is co
nve
nie
nt for cutti
ng a
nd formi
ng avortexwith the cover shell to se
nd the grass i
nto the collecti
ng pla
nt-- collecti
ng straw bag. The bracket for the eddy-shaped law
n trimmer is also a stampi
ng part to protect the operator a
nd pedestria
n safety a
nd to guide the cutti
ng. Thewalki
ng device is composed of a law
n mower a
nd awalki
ngwheel. Whe
n thewheel is reduced, the cutti
ng blade is lowered, a
nd the grass height is i
ncreased. A
ndviceversa. Keywords: grass cutter；reamer；tra
nsmissio
n shaft；ma
ntle；desig
n of structure protectio
n 目录 摘要III Abstract IV 1绪论1 1.1割草机研究背景1 1.2我国割草机的发展2 1.3手推式割草机的使用4 2总体方案设计5 2.1割草机的分类5 2.2割草机的基本要求5 2.3总体设计6 3结构设计计算8 3.1发动机的选择8 3.2旋刀设计8 3.3外壳设计11 3.4传动轴结构设计计算11 3.5离合器的设计14 3.6调高装置设计14 3.7车轮及把手选择15 3.8消音减噪设计15 4结论16 参考文献17