除草机的结构设计毕业设计【含全套CAD图纸和WORD说明书】

本科学生毕业设计

除草机的结构设计

The Graduation Design for Bachelor's Degree

The Structure Design of The Forest Brush

Breaker

Candidate：Zhou Xuan

Specialty：Mechanical Design and Manufacture and

Automation

Class：08-3

Supervisor：Lecturer. Ren Zhongxian

haerbin Institute of Technology

2012-06·Harbin

摘要

本设计介绍了一种林区除草机产品：自走式除草机。设计中根据林区路面状况，以及清林抚育的作业情况，而设计出能够适应林区崎岖路面及道路狭窄等恶劣环境的自走式除草机，具有很高的实用性和推广价值。

该自走式除草机由行走部分，割灌部分，驾驶台以及排障部分等组成，可以锯切加工直径范围在10 ～80mm的灌木。整个机器由两个汽油机提供动力，一个提供行走动力，另一个提供割灌动力。锯片位于整个机器的前下端，由驾驶台控制杆控制其离地面高度，以适应林区路面状况。通过顶部的排障杆使高于机器顶部的灌木倒向预定方向，达到排障目的。该自走式除草机结构简单，容易维修，操作简单。

在文章中，对该自走式除草机的主要部件进行了设计计算（例如：皮带轮，轴，轴承，键，四连杆等），并对主要部件进行了系统的介绍和说明，对使用中涉及到的润滑，保养及注意事项也作了说明。

关键词：自走式；除草机；除草部分；行走部分；驾驶台；排障杆

Abstract

A self preceded trash breaker, a new forestry machine has been presented in this paper. According to forest road surface conditions, and working situations of clearing fostering trees, the self-propelled brush breaker was designed to adapt to any atrocious environment, such as rugged road surface, narrowness of road and so on. It was highly practicability and generalizing value.

This self-propelled brush breaker is consist of walking port, cutting port，bridge and breaching of obstacles part and can saw brush in diameter range from 10mm to 80mm.The power of whole machine is supplied by two petrol motors, one is for running power，the other is for breaking brush power. Saw blade was under the machine，the control stick on driving stand control its height away from ground to adapt to the forest road surface condition. The bushes that are higher than the machine can be controlled by a pilot bar, which can make bushes fall along the pre-designed direction and get rid of obstacles. This structure of self-propelled brush breaker is simple, is easy to maintain, and is operated easily as well.

The main parts of the self-propelled brush breaker have been compeered and tested in this paper, such as pulley, axes, bearing, bond，four link rods and so on, and the main parts have been introduced and explained systemically, and have lubrication ,maintenance and other matters n related in using.

Key words：Self-propelled；brush breaker；the cutting port；the walking port；bridge,；pilot bar

目录

摘要 (Ⅰ)

Abstract (Ⅱ)

第1章绪论 (1)

1.1引言 (1)

1.2除草机的应用范围 (1)

1.3除草机的发展现状 (2)

1.4我国除草机的市场及前景 (6)

1.5除草机的发展方向 (7)

1.6自走式除草机设计的意义 (8)

第2章结构概述 (9)

2.1工作原理 (9)

2.2结构分析 (9)

2.3本章小结 (10)

第3章行走部分设计 (11)

3.1 方案的确定 (11)

3.2 机构选择 (12)

3.3 动力选择 (13)

3.4 主要设计参数 (13)

3.5本章小结 (14)

第4章除草机部分设计 (15)

4.1 方案的确定 (15)

4.2 汽油机输出带轮设计 (15)