The grab of excavator can be divided into shell grab and orange leaf scrap grab according to its shape. The former consists of two complete bucket-shaped components, and the latter consists of three or more jaw plates. This kind of excavator grab itself is equipped with open-close structure, generally driven by hydraulic cylinder, so the grab composed of multiple jaw plates is also called hydraulic grab machine. Generally divided into four claw, five claw.
Shell grab excavator is generally used for excavation of foundation pit, excavation of deep pit and loading of mud, sand, coal and gravel, as well as loading and unloading of ships, trains and automobiles. Orange scrap scrap grab (also known as grab steel machine) is mainly used for iron scrap collection.
At the same time, the hydraulic grab for different operational requirements there are a variety of deformation bodies, such as stone grabber, wood grabber and so on. However, stone grabbers are rarely seen in general use, more common is the wood grabber, some loaders also have wood grabbing loader holders.
The difference between the wood grabber and the stone grabber is that the grab curve is bigger than the stone grabber, but the strength is not as good as it. Generally, the wood grabber and the stone grabber can rotate 360 degrees, because it is convenient for loading or stacking. Because the rotating motor and the grabbing cylinder each use a set of hydraulic power, so in the excavator arm to distribute two more sets of pipes, if the engine hydraulic main pump valve does not have reserved valve port, but also add valve port, device analogy trouble. It is necessary to add two sets of hydraulic valve blocks and pipelines to control the excavator.
The main function of wood grabber is to carry out the loading, unloading and handling of wood, wood, reed, straw and various strip materials. Stone grab is mainly used for loading and unloading stones, construction waste handling and handling.
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