Construction machines are industrial machines used to perform all the actions that requires earthmoving work, that is a change in the ground shape generally to build something or manage the territory to carry on excavations.
A loader is a mechanical earth mover used to move and load construction material (soil, sand, asphalt, snow, demolition waste etc.) The loader can pick up a lot of material thanks to the inferior edge (blade) and to its capacity, which is superior with respect to other excavating machines of the same size. The frontal loader is linked to the main structure by means of two hydraulic arms. If needed, it is possible to change the frontal instrument and to install other tools (e.g. calipers to pick up trunks, pipelines etc.) Loaders come in different categories, for example:
Backhoes are machines used for earth moving, digging and e backfill works. Its main characteristic, which makes it different from other mechanical earth movers, is the presence of both an anterior blade and of an excavating arm on the posterior side. A backhoe is a very adaptable machine, because it combines the two most useful and most important instruments of earth moving machines on a agile and relatively small vehicle. Thanks to these characteristics, backhoes are among the most common machines in construction sites.
Backhoes can be fixed (i.e. with a rigid framework and with a steering system on the anterior wheels) or articulated (also called flexible), because of the two articulation points in the center of the vehicle. The functioning of the two articulation points is similar to the ones installed on dumpers and on scrapers - where one articulation point allows for a rotation on the vertical axis (i.e. the steering), and the other one allows for a rotation on the horizontal longitudinal axis, allowing the two axes to rest on two non-parallel plans at the same time. Backhoes are divided in two categories :
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