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毕业设计-便携式高枝动力剪切机的设计，共30页，8361字，附设计图纸
摘 要：随着城市绿化工程的发展，急需开发方便实用的高大树木剪切机。传统的修枝方式仍是人工架梯使用修剪工具进行， 这种工作状态不仅作业条件差， 体力消耗大，效率低，而且很不安全。而目前一般采用的高枝修剪机存在着操作杆过重，劳动强度大，极易疲劳等问题。为此我们设计了一种劳动强度小、 操作方便的便携式高枝剪切机。
关键词：工作头；切削力；锯切；伸缩杆；剪切；小推车
Design of Portable High-shear Force Stick
(Oriental Science ＆Technology College of Hunan Agricultural University, Changsha 410128)
Author: Xie Dong
Tutor:Quan Lazhen
Abstract: Along with the development of city afforestation project,developing the convenience practical big trees alligator shears is urgently needed. The tradition pruned the way was still the artificial padder using pruning implements carries on, this kind of active status work condition was not only bad, the physical strength consumed in a big way, the efficiency was low, moreover was very unsafe. But uses generally at present Gao Zhi the cropper has the operating lever to be overweight, the labor intensity is big, extremely easy weary and so on questions. Therefore we designed one kind of labor intensity to be young, ease of operation portable high alligator shears.
Keyword: labor foreman; cutting force; sawing; expansion link; cutting；small cart

目 录
摘要………………1
关键词……………1
1 前言……………1
1.1便携式高枝动力剪切机国内外现状………2
1.2便携式高枝动力剪切机提出的依据和意义3
1.3课题研究的内容和方法…3
2 方案确定………4
3 受力分析………7
3.1修枝过程中运动分析与功率计算…………7
4动力源的选取…8
5传动部分的设计9
5.1驱动部分设计……………9
5.2键的强度校核……………9
5.2.1键的选择…………9
5.2.2确定键的尺寸……9
5.2.3验算挤压强度……9
5.3对锥齿轮的强度校核……10
5.3.1选材料、热处理方法、定精度等级10
5.3.2初步设计…………10
5.3.3校核接触强度……13
5.3.4校核齿根弯曲强度校核 …………15
5.3.5齿轮各检验项目及公差值的计算…16
5.4 轴的强度校核……………18
5.4.1按扭转强度条件计算………………18
6轴套的强度校核21
7支撑杆的强度校核………………23
7.1支撑杆的扭转强度校核…23
7.2按弯矩强度条件计算……24
8附件……………25
参考文献…………25
致谢………………26