毕业论文___割草机设计.doc

2014届 分 类 号: 　　　　　　　　　　　　　　　　单位代码:10452 毕业论文（设计） 小型割草机的设计 　　　　　　 姓 名　 　　　　　 　　　　　　 学 号　　　 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。同时它们对减少城市里二次扬尘和减轻噪声污染也有较好的效果。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。本文对、、具体做了详细介绍，并且重点计算确定了传动中齿轮和轴的基本尺寸，对各个标准零件、非标准零件的选取也做了相应的计算。修剪草坪保证节省原料、造价低、污染小割草机ABSTRACT Development of lawns and ground cover is to maintain the ecological balance, protecting the environment and health, beautify the city appearance, to reduce atmospheric pollution, one of the effective measures to prevent soil erosion, especially for the sandstorm weather in the north of China. Them at the same time to reduce the secondary dust and reduce the noise pollution in city also has a better effect. And to maintain the lawn is beautiful and neat is to be trimmed regularly. Pruning process is to be completed by lawnmower. In this paper, the lawn mower driving device, transmission device, cutting device, such as the specific device is made in detail, and the key drive system of the calculate and determine the basic size of gear and shaft, the selection of various standard parts, non-standard parts and do the corresponding calculations. In this paper, design of lawn mower is suitable for home garden and private garden use small grass, when mowing the lawn to ensure the save raw material, low cost, little pollution, meet environmental requirements. Keywords:The glass cutting machine; Drive design; Transmission device design; The knife device design? ;Strength calculation目 录 1.引言 1 2．割草机的概述 2 3.总体方案 4 3.1设计要求 6 3.2整体结构 6 4驱动装置设计 7 5传动装置设计 7 5.1传动装置运动和动力参数计算 7 5.2减速器齿轮设计 9 5.2.1材料选择 9 5.2.2主要尺寸设计 9 5.2.3精度等级及公差值确定 10 5.2.4弯曲强度校核 11 5.3减速器轴设计 11 5.3.1从动轴设计 11 5.3.2主动轴设计 16 5.4减速器箱体设计 17 6切割装置设计 18 6.1材料的选择 19 6.2切割装置的运动 19 6.3动刀结构 20 6.4刀片间隙调整 20 6.5双曲柄设计 20 6.5.1双曲柄半径r的设计 20 6.5.2双曲柄结构设计 21 7总结 23 参考文献 24 致谢 25 1.引言 在所有园林具中，割草机用可谓