A tractor It is a machine that has the ability to generate traction (the act of pulling a thing to move it). Regarding the etymological origin of the term, some experts say that it is found in the Latin word tractus, while others point to the Latin verb trahere, which can be translated as "throw".
The most common use of the concept refers to a motor vehicle that, thanks to the adherence of their chains or wheels to surface , is used to drag a trailer or a plow. For this reason, tractors are often used in agricultural tasks.
With respect to structure and the components of a tractor, in broad strokes we can say that its parts are the following: the chassis (it provides the rigidity and support necessary to hold together the rest of the mechanical components and the suspension of the wheels), the engine, hydraulic transmission and hoist, hitch and a gearbox.
The development of tractors allowed minimize the use of draft animals , like horses, donkeys or oxen. As well reduced the amount of labor which should be used for field work. This is because the tractor facilitates and automates various activities that were previously performed manually or with the help of the exploitation animal.
There are different kinds of tractors. The wheel tractors they are those that, for their displacement, use wheels , which are much larger than those used by vehicles we usually see on the streets (cars, trucks, etc.). The caterpillar type tractors , meanwhile, they have chains instead of wheels.
Tractors may have one or more drive systems for the use of implements. In the case of tractors that are used for the development of tasks related to farming , usually have different arms that allow them to use tools that fit their structure, such as plows , fertilizers , mowers or balers .
The number of arms in this case is three, two actuators and one tensor . This system is called tripuntal hitch and has the function of raising and lowering the aforementioned attachable tools. The movement of the two arms that are in the lower part is usually carried out by a hydraulic pump through a distributor, and this works thanks to the engine of the tractor itself.
The movement of the tripuntal system is flat four bars ; this is also called articulated quadrilateral and, in the field of mechanical engineering, it defines a mechanism that consists of four bars, three of which are mobile, that are joined with articulated knots and pivots. The upper arm, within the three mobiles, is the only extendable since it must take care of the regulation of the implement.
Current tractor technology includes the inclusion of an electronic system of sensitivity in the articulated arms capable of detecting and canceling any pressure that exceeds the limits preset by the manufacturers, thanks to which it is possible to avoid breakdowns.
In 1992, a song became the success of the summer of several Spanish-speaking countries: "Yellow tractor"It is a song composed and recorded by the group Fast Shoe , which was formed in Asturias, Spain, in the year 1991 and remained active until 1994. The letter of the subject comically recommends buying a tractor, since "it is the cheapest way to have a convertible." Summer is often associated with meetings to listen to music and drink, and this kind of seemingly carefree music is an ideal complement.
In colloquial language, finally, it is qualified as "tractor" to the individual who has a large force physical. For example: "Uncle is a tractor, I'm sure he will get ahead", "The new striker signed by the Catalan team is a tractor: it has amazing power".
