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世界上第一台液压挖掘机于1954年在联邦德国问世以来,随着液压技术的发展,产品结构性能不断完善。挖掘机应用于土方、建筑工程及采石场,由于液压挖掘机传动部件少,重量轻,占地面积小,灵活机动,操作维护简单,它既有电铲的插入力,又有轮式装载机的掘起力,比同规格电铲大2～2.2倍,而机重却降低50％。在70年代初,液压挖掘机的斗容已发展到8m~3,开始进入采矿领域,确立了在欧洲采矿工业中的地位。到80年代初在北美液压挖掘机也逐渐被人们所认识,使斗容在8m~3以下的电铲
Since the world’s first hydraulic excavator was introduced in the Federal Republic of Germany in 1954, with the development of hydraulic technology, the product structure performance has been continuously improved. Excavators are used in earthworks, construction projects, and quarries. Because hydraulic excavators have few transmission parts, they are lightweight, they have a small footprint, they are flexible and maneuverable, they are easy to operate and maintain. They have both the insertion force of shovels and wheel loaders. The digging force of the machine is 2 to 2.2 times larger than that of an electric shovel of the same size, but the weight is reduced by 50%. In the early 1970s, the hydraulic excavator’s bucket capacity has grown to 8m-3 and it has begun to enter the mining sector, establishing its position in the European mining industry. In the early 1980s, hydraulic excavators in North America were gradually recognized by people, so that buckets with a capacity of 8m-3 or less are available.