1、 I 摘摘 要要 挖掘机是大多数露天矿必不可少的生产设备， 是工程机械中最重要的采掘设 备，在冶金、能源、矿山等方面有广泛的应用。矿用挖掘机是露天矿间断式开采 的主要设备,它可以实现完全机械化,具有机械化自动化程度高、斗容量大、环保 性能好、挖掘效率高、进度快、机动性能好等优点。 由于常常在野外和露天作业，工作环境十分恶劣，要求挖掘机的各个装置既 要结构合理,性能安全可靠又要尽可能降低成本。推压机构作为挖掘机的主要的 工作部件，它的性能直接影响挖掘机的整体工作性能。本文通过对挖掘机的四种 工况进行分析，确定推压机构的计算载荷，确定推压机构所需的功率，确定传动 方案，设计推压机构。 本文还介绍了
2、挖掘机国内外发展的现状、挖掘机的结构组成及工作过程，以 及本论文需要应用的理论基础和应用的工具，并使用 AutoCAD2004 软件绘制推 压机构总装及零部件的二维图纸。 关键词：关键词：矿用挖掘机 推压机构 二级减速器 有限单元法 II Abstract Excavator is necessary producing equipment for lots of strip mine, and it is the most excavating equipment of engineering machine which is broadly used in metallurgy, ener
3、gy sources, mine etc. Large mining excavator is the main equipment when exploiting strip mine. It can achieve completely mechanization. It has the characteristic of high automatization, good property of environmental protection, the efficiency of excavation is high, and progress is rapid, quality is
4、 reliable,and maneuverability is good. Due to work outside frequently, working environment is very bad. Which needs excavator not only has reasonable configuration, safe and reliable performance, but also has lower cost. pushing mechanism is excavators leading working parts, whose performance can directly influence excavators working performanceBased on the four excavators working conditions,we analyse and determine assumed load ,pushing power and driving scheme of pushing mechanism, the
