摘要

割灌机作为营林机械的一种，用于林地清理、幼林抚育、次生林改造和森林抚育采伐等割除灌木、杂草、修枝、伐小径木、割竹等作业。我国灌木树种资源极为丰富，近几年来，为了防风固沙、保持水土、改善生态系统、维持生态系统、维持生态平衡，正在持续大面积种植灌木，仅内蒙古鄂尔多斯市就有沙生灌木1200多万亩，我国西部地区沙生灌木资源也非常丰富且集中。根据沙生灌木的生物学特性，每3~5年就需进行平茬，平茬后生长加快，萌发力加强，具有复壮作用。平茬收割时若手工劳作，其劳动强度大且生产效率低，因此，为了提高生产效率，割灌机必不可少。而本次设计的小型便携式割灌机就是割灌机中一种简便、快捷的机具。

割灌机能切割直径4cm以内的多种林木杂草；应尽可能小型便携，以方便在地区崎岖，起伏不定的山林地带操作，灵活工作；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。

Design of Small portable brush cutter

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 about 12000000 mu 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