毕业论文-无动力手推式割草机设计.doc

无动力手推式割草机设计
目录
摘要 4
Abstract 5
第一章绪论 6
6
无动力手推式割草机国内外的发展现状 6
割草机的概述 8
8
手推式割草机的结构特点 10
如何安全操作草坪割草机 11
第二章割草机总体方案的设计 12
第三章割草机零部件的设计 15
割草机行走轮的设计 15
17
凸轮的设计 17
凸轮材料的选择 17
18
切割器材料的选择 20
23
23
轴的设计 23
轴的材料选择 23
24
24
球轴承的特点 24
轴承的转速 24
键的选择 25
平行四杆机构的设计 26
26
总结 27
致谢 28
参考文献 29
摘要
发展草坪和地被植物是维护生态平衡、保护环境卫生、美化城市面貌、减少大气污染、防止水土流失的有效措施之一,特别是针对我国北方的沙尘暴天气。而维持草坪的美观与整齐就要对其进行定期修剪。修剪的过程要靠剪草机来完成。
割草机按切割器类型可以分为旋刀式、往复式、滚刀式、***式、甩绳式。其中,应用最多的是滚刀式割草机和往复式割草机。按配套动力和作业方式分可以分为:为手推式、手扶随行式、手扶自行式、坐骑式和拖拉机悬挂式割草机。按动力驱动方式主要分为人畜力驱动、发动机驱动和电力驱动3种形式割草机。
本次设计的手推式剪草机的主要由操纵机构、行走机构、切割器、护罩等几大部分组成。
关键词: 操纵机构、行走机构、切割器、护罩
Abstract
To develop lawn is one of the effective measures that can maintain ecological balance, protect environmental sanitation and beauty urban appearance. To maintain lawn beauty and neatly, we must cut the grass in certain time. The glass-cutting machine will realize the course pruned.
According to the cutter types can be divided into the lawn mower spin knife type, reciprocating, hob type, ShengShi jilt knife type, rejection. Among them, the application is the largest hob type lawn mower and reciprocating lawn mower. By supporting power and practices can be divided into: for hand portion push type, escalators, panying type, walking self-traveling, mount type and tractor suspension lawn mower. According to the driving way are mainly divided into people work drive, the engine drive and electric drive three forms a lawn mower.
This design hand push type lawnmowers manipulated mechanism, mainly by the mobile mechanism, cutter, shield and several other ponents.
Keywords: operation, walking institutions, cutter, shield

选题的背景和目的
在剪草机问世之前,草坪的修剪主要工具是镰刀,放牧牛羊也是保持草地平整的重要方法。随着高尔夫球、网球及足球等运动的兴起,人们拥有平整美观的草地做运动场地的要求越来越迫切。1805年英国人普拉克内特发明了第一台收割谷物并能切割杂草的机器,由人推动机器,通过齿轮传动带动旋刀割草,这就是旋