设计描述：

文档包括：

设计说明书一份，49页，约18000字
CAD版本图纸，共3张

………………

6t液压挖掘机的设计

摘　要

本次毕业设计课题是液压挖掘机。课题是受企业委托而立项。本人致力于液压挖掘机整机设计，即整机参数的计算，整机稳定性计算，整机重心计算，底盘的设计以及履带行走装置的设计。设计思路是从挖掘机总体以及各部分的工作性能和动作要求入手，并以国内的质量和技术性能接近设计要求的挖掘机为基础，研究国外的先进机型，开发出自己的整套液压挖掘机。图纸采用AutoCAD 绘制，经过认真地设计计算,查找资料撰写设计论文。
本液压挖掘机的优点是液压系统采用先导伺服控制，造型美观。除具有挖掘装卸的功能外，还可以根据需要加装不同的辅助设备，来进行抓物，钻孔，推土，清沟，破碎等作业。平台可360°回转，性能可靠，操纵工人劳动强度改善。可广泛应用于建筑，市政，供水，供气，供电，农林及园艺建设等工程。
 
关键词：液压挖掘机， 整机稳定性，整机重心，底盘，履带行走装置
 

THE DESIGN OF HYDRAULIC EXCAVATOR
 

ABSTRACT

The name of the graduating task is “ hydraulic excavator”. The task is requested by a company. My task is to design the whole hydraulic excavator. That is to decide parameter of the whole machine, to compute stability, the barycenter of the whole machine, to design chassis and pedrail tread equipment. The way to solve the task is on the basis of the function of the whole and every part of the excavator. And we choose the domestic excavator whose quality and character is the most similar to our request as the basic type, further study the overseas advanced type. Then I designed the projects of the whole hydraulic excavator. All the drawings are drawn using the Auto CAD. After the serious designing, calculating and consulting I wrote this thesis.
The strongpoint of this hydraulic excavator is using servo forerunner control system. It has beautiful sculpt. With the capacity of excavating, grappling, drilling, pushing, clearing channel and crashing etc. Have a 360° swinging platform, good quality, comfortably controlled. Be widely used in construction, supplying and city planning.

KEY WORDS: hydraulic excavator, stability of hydraulic excavator,
               the barycenter of the whole machine, chassis, pedrail tread equipment

目    录

第一章 绪论 1
§1.1液压挖掘机的工作特点和基本类型 1
§1.1.1液压挖掘机的主要优点 1
§1.2液压挖掘机的发展概况 1
§1.2.1国外液压挖掘机目前水平及发展趋势 1
§1.2.2国内液压挖掘机发展概况 4
§1.3小结 5
第二章  液压挖掘机的整机设计 6
§2.1液压挖掘机主要参数的确定 6
§2.2整机稳定性计算 10
§2.3整机的重心计算 26
§2.4小结 28
第三章 底盘的计算 29
§3.1底盘数据概述 29
§3.2底盘强度计算 31
§3.3许用力的选取 35
§3.4小结 36
第四章 履带行走装置的计算 37
§4.1压马达的输出扭矩和转速 37
§4.2 挖掘机的行走速度和牵引力 38
§4.3 挖掘机爬坡度计算 40
§4.4 行走、下坡制动力计算 40
§4.5 弹簧张紧装置计算 41
§4.6 小结 43
结论 44
参考文献 45
致　　谢 46