机械制造及自动化专业毕业论文--小型便携式割灌机设计.doc

摘要 动力装置应符合国标要求；长期在恶劣的噪声环境中工作会导致职业性耳聋,并且在4KHz附近容易产生听力损伤，这是职业性耳聋的特点，所以割灌机工作是应尽量防止噪声过大，并使用消音器；要尽量减小割灌机把手的振动；工作部分采用尼龙丝、圆锯片等做为切割部件。 关键词：割灌机；小型；便携。 Abstract One of the brush cutter as a forestry machinery, used in forest land clearing, young forest tending, Secondary forest transformation and forest tending cutting, etc. Resect shrubs and weeds, trimming and cutting path cut wood, bamboo and the other works. Shrub species resources are very abundant in China, in recent years, in order to prevent the land, conserve water and soil, improve the ecological system, maintain ecological balance, we are planting large area of shrubs, only the Inner Mongolia Erdos City has aboutmu of sandy shrub, shrub resources in western region of China is also very rich and concentrated. According to the biological characteristics of shrub, it will accelerate growth ,strength sprout and has the effect of rejuvenation after stubble for every 3~5 years. When you are harvesting, manual labor is intensity and low production efficiency, so in order to improve the production efficiency，brush cutter is indispensable. The design of the small portable brush cutter is an easy and fast machine of the brush cutter. Brush cutting diameter 4cm function within a variety of trees and weeds. It should be as small and light, in order to facilitate the rugged terrain undulating forest zone operation, flexible working. Power unit shall comply with the requirements of GB. Long in harsh noise environments can cause occupational deafness, and in the vicinity of 4KH prone hearing loss, which is the characteristics of occupational deafness, so brush cutter work, it should try to prevent excessive noise, and use the silencer. To minimize vibration handle brush cutter, work part adopts nylon yarn, such as a circular saw blade cutting parts. Key words: brush cutter; small; portable 目 录 第一章 绪论 1 1.1 引言 1 1.2 国外小型便携式割灌机发展概况 1 1.3 国内小型便携式割灌机发展概况 4 1.4 本文研究的目的及意义 6 第二章 小型便携式割灌机的设计方案 7 2.1 小型便携式割灌机的比较和选择 7 2.2