When one speaks about heavy machinery, they are referring to heavy-duty vehicles, and designed equipment for construction tasks and earthwork operations. There are many different types of heavy duty machines, each one specialized for a specific task, but usually it comes down to six basic systems: implement, traction, structure, power train, control and information.
These machines work with the mechanical advantage of a simple machine, although the ratio between input forces applied and force exerted is multiplied, many using hydraulic drives as their main source of movement. The following are the most common machines used for heavy works
Articulated dump truck
They are similar to semi-trailer trucks, but the cab is a permanent fixture and not a separate vehicle. They can steer with the help of hydraulic rams that pivot the entire cab, instead of rack and pinion steering on the front axle, and can adapt really well to rough terrain.
this shovel-like blade is a powerful tracked piece, and is much like a blade and crawler tractor combined, although it used to be a term to refer to only the shovel-like blade. It has excellent movement through rough terrain, and its wide tracks help distribute the bulldozer’s weight over a large area, preventing it from sinking on difficult terrain.
They were developed from wheel loaders by fitting in a dozer blade instead of the loader arms and bucket. This machine is only used for light-duty tasks.
Cable tractor: it can be used for pulling cables, either for electricity implementation or cable for a mine shovel or wire ropes during a shovel rope change.
This piece of equipment can be employed in civil engineering and surface mining. It is also used in civil engineering of a smaller magnitude as pile driving rigs, or in coal mining as a larger sized machine moving overburden above coal. They are the largest mobile equipment ever built on land.
They are used for mining and dirt hauling jobs. The name comes from its main task, which is loading materials into it and discharging by lowering its rear. It has two primary forms: rigid frame and articulating frame.
They can be used in almost every task, but they are not as efficient as each specialist machine individually. However, since they have the ability to perform almost anything, many companies keep them in their fleets.
These machines are used for digging, hauling, and levelling out materials in many types of construction duties. They can quickly move large quantities of earth around a construction site, and come in two kinds: the standard motor scrapper, and the dual engine wheeled scrapper. The standard model consists of a bowl, an apron to drop down the load of material or to retain it, and an ejector to push out the load. All of these functions can work independently because of their hydraulic systems. The dual engine works in a tandem way, one engine driving the front wheels and the other driving the rear wheels, enabling the machine to work better in shorter spaces where there is less space to manoeuvre.