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农用挖掘机是指配在轮式或履带式拖拉机上的一种后置悬挂式液压挖掘装置,它是近年才发展起来的。这种液压挖掘机配有反铲挖掘斗、蚌式抓斗和起重吊钩等多种工作部件,可以进行各类淘渠的挖掘、中小型沟渠的清淤、各种散装物料的装载和1～2吨重物的起吊等多种作业。适用于农业工程、市政建筑、农田水利、人防工程、石油管道、砖瓦工业、公路修建、林业建筑、地质探矿等部门的土石方作业。我国在1975～1978年间,各地农机科研单位和农机厂为东方红—40、东风—50、辽宁—60和东方红—75等拖拉机配上了第一代农用液压挖掘机。由于都采用同一斗容量,功率利用不合理、生产效率低、能耗大、机组综合利用率低、经济性能差。故从1979年开始,由中国农机院、山东省广饶液压机械厂、辽宁丹
The agricultural excavator is a type of rear-mounted hydraulic excavating device that is equipped on a wheel or crawler type tractor. It has only recently been developed. This hydraulic excavator is equipped with a variety of working components such as a backhoe bucket, a rake type grab, and a lifting hook, and can be used for excavating various types of nautical trenches, dredging of small and medium-sized ditches, and loading of various bulk materials. 1 to 2 tons of heavy lifting and other operations. Applicable to agricultural engineering, municipal construction, farmland water conservancy, civil air defense projects, oil pipelines, brick and tile industry, highway construction, forestry construction, geological prospecting and other departments of the earth and stone operations. In China from 1975 to 1978, agricultural machinery research institutes and agricultural machinery factories in various parts of the country were equipped with first-generation agricultural hydraulic excavators for tractors such as Dongfanghong-40, Dongfeng-50, Liaoning-60, and Dongfanghong-75. Due to the same bucket capacity, unreasonable power utilization, low production efficiency, high energy consumption, low overall utilization rate of the unit, and poor economic performance. Therefore, starting from 1979, the Chinese Agricultural Machinery Institute, Shandong Guangrao Hydraulic Machinery Plant, and Liaoning Dan