土方机械 液压挖掘机和反铲装载机下降控制装置 要求和试验

[中文适用范围]： 本文件规定了安装在液压挖掘机和反铲装载机的动臂、中间动臂和斗杆油缸上的下降控制装置的统一要求和测试程序，用于在液压管路发生故障或破裂时控制下降速度。它适用于液压挖掘机的下降控制装置和用于搬运物体的反铲装载机的反铲设备，这些设备配备了制造商定义的标准连杆。在提供替代连杆组合的机器上，仅对制造商定义的标准长度进行测试。 [外文原描述]： This document establishes uniform requirements and test procedures for lowering control devices fitted on the boom, intermediate boom and arm cylinders of hydraulic excavators and backhoe loaders to control the rate of drop in the case of a hydraulic line failure or rupture. It is applicable to the lowering control devices of hydraulic excavators and the backhoe equipment of backhoe loaders used for object handling which are equipped with the standard linkage as defined by the manufacturer. On machines where alternative linkage combinations are offered, only the standard length defined by the manufacturer is subject to testing.