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GJ942249 将钢丝绳-铲斗挖掘机改装为起重机的方法 US 5048172〔专,英〕/(Grav-en-Horst Richard L.).-1991.9.17.-(1990.2.28);Int.Cl.B 21 K 21/16 根据该专利,在挖掘机的回转部分上面安装一个在其头部吊挂着起重钢丝绳滑轮的起重机吊臂。在吊臂下部的平板上安装着液动机;液动机配备了液控盘式制动器的起重卷扬机的
GJ942249 Method of converting a rope-bucket excavator into a crane US 5048172 Grav-en-Horst Richard L., Sep. 17, 1991 - (1990.2.28) Int.Cl.B. 21 K 21/16 According to this patent, a crane boom with a wire rope pulley suspended from its head is mounted on the swinging part of the excavator. A hydraulic motor is mounted on the lower plate of the boom; the hydraulic hoist is equipped with a hydraulically actuated disc brake