毕业设计（论文）液压挖掘机设计.doc

摘要 随着社会的不断进步，改革开放的深入，我国的基础建设项目不断增多，对工程机械产品的需求量也越来越大。液压挖掘机是工程机械的重要产品之一，具有较高的技术含量。而无尾式小型液压挖掘机在我国的发展才刚刚起步，其技术还远远落后于国外。在参照和分析CASE系列和久保田系列小型液压挖掘机的基础上，设计了无尾式小型液压挖掘机。 本文完成的主要工作有： 1)建立了液压挖掘机主工作装置的数学模型； 2)针对工作装置的计算工况，建立了相关的力学模型； 3)确定了液压挖掘机的设计方案，完成了主要参数的设计计算； 4)对主要工作装置的铰点和关键部位进行力学分析和计算； 5)建立了底盘行走系的数学模型和结构模型； 6)对底盘行走系的相关部件进行的校核计算； 7)对整机的稳定性进行了分析和研究，并对其可能发生的失稳状态进行校核。 关键词：液压挖掘机，主工作装置，底盘行走系，推土铲,挖掘装置 Abstract With the development of the society and economy in China, many fundamental engineering projects need to be completed by the excavators. The hydraulic excavator is one of the most important construction machineries. The hydraulic excavator includes the higher technical specification, and it is very difficult to design them. But the development of the small scaled hydraulic excavator with no tail in our country just start, and the technique has been got behind with the abroad far and far. In this design, the series of CASE and Kubota are followed. Main contents contained in the article are following: 1. The mathematical model of the main working equip has been established. 2. According to working condition, the correlated mechanics model of the main working equip has been established. 3. Offering the schedule of the hydraulic excavator and the main parameters’ calculation. 4. Mechanics analyzing and the fulcrums and important components of the main working equip. 5. The mathematical model and structural model of chassis motion train has been established. 6. Checking and calculating the strength of the correlated components of the chassis motion train with traditional method. 7. Analyzing and researching the stability of the total machine, and checking the condition which may will stability. Keywords: Hydraulic excavator , work equipment, chassis motion train, earth-moving shovel，dig equipment. 目录 TOC \o 1-3 \h \z \u 1 绪论 1 1.1本课题的目的和意义 1 1.2国内外小型挖掘机的发展情况 1 1.2.1国内小型挖掘机的发展现状 1 1.2.2国外挖掘机目前水平及发展动向 2 1.3本设计研究的主要内容 4 1.4本课题的技术难点及主要手段 4 2 总体方案构思 6 2.1基本原