刨挖冻土和坚硬土,国外广泛采用风动、液力或机械传动的冲击式工具,一般装在履带或轮胎式挖掘机或汽车上。近几年的趋势是将冲击工具制成可更换的悬吊式,装在液力传动的挖掘机上,将冻土刨开后可以立即挖掘。而且动作范围比较宽,水平表面及垂直表面都能刨挖。冲击锤是风动或液力传动的,一般吊装在安装挖斗的位置上。 Planing frozen soil and hard soil, abroad widely used pneumatic, hydraulic or mechanical transmission impact tool, usually mounted on a track or wheel excavator or car. In recent years the trend has been to make the impact tool interchangeable with a suspended type mounted on a hydraulically powered excavator to excavate the frozen earth once it is laid open. And a wide range of motion, horizontal surface and vertical surface can dig. Hammer is pneumatic or hydraulic drive, generally hoisted in the installation of bucket position.