ES1281052U

ES1281052U - BRUSH MACHINE (Machine-translation by Google Translate, not legally binding)

Info

Publication number: ES1281052U
Application number: ES202131917U
Authority: ES
Inventors: Jimenez Francisco Miguel Marin
Original assignee: Explotaciones Agricolas La Florida S L
Current assignee: Explotaciones Agricolas La Florida S L
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-08
Anticipated expiration: 2031-09-27
Also published as: ES1281052Y

Abstract

Brushcutting machine which, designed to be attached to the back of a towing vehicle, and equipped with cutting means to eliminate grasses or weeds at ground level, is characterized by comprising: - A mobile hydraulic arm (2) with at least one horizontal position for use, made up of a chassis of at least one main straight section (20) of metal profiles, with a lateral rolling wheel (3) and a Central support wheel (4) and which is joined by a lateral end and in an articulated way to a support structure (5) and coupled to the towing vehicle, such that said mobile arm (2) goes up and down supported on the central wheel (4) of support adjusting to the irregularities of the terrain; - cutting means formed by a plurality of circular cutting plates (6) coupled to the arm (2) at its lower part; and - A hydraulic system that operates at least a first cylinder (7) to move the arm (2) and that comprises an oil tank (8) and a cooler (9). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPCIÓNDESCRIPTION

MÁQUINA DESBROZADORABRUSH MACHINE

OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION

La invención, tal como expresa el enunciado de la presente memoria descriptiva, se refiere a una máquina desbrozadora que aporta, a la función a que se destina, ventajas y características, que se describen en detalle más adelante, que suponen una mejora del estado actual de la técnica.The invention, as expressed in the wording of the present specification, refers to a brushcutting machine that provides, to the function for which it is intended, advantages and characteristics, which are described in detail below, which imply an improvement of the current state of technique.

El objeto de la presente invención recae en una máquina desbrozadora del tipo que, destinada a su acople a la parte posterior de un vehículo tractor, comprende unos medios de corte para eliminar malas hierbas que crecen en terrenos de árboles de cultivo, la cual se distingue, esencialmente, por comprender dichos medios incorporados en un brazo hidráulico con una rueda de apoyo que puede subir y ajustarse a las necesidades del terreno, evitando afectar a los sistemas de riego.The object of the present invention falls on a brushcutting machine of the type that, intended to be coupled to the rear part of a tractor vehicle, comprises cutting means to eliminate weeds that grow in fields of cultivated trees, which is distinguished Essentially, by comprising said means incorporated in a hydraulic arm with a support wheel that can rise and adjust to the needs of the terrain, avoiding affecting the irrigation systems.

CAMPO DE APLICACIÓN DE LA INVENCIÓNFIELD OF APPLICATION OF THE INVENTION

El campo de aplicación de la presente invención se enmarca dentro del sector de la industria dedicada a la fabricación de aparatos y maquinaria agrícola, centrándose particularmente en el ámbito de las máquinas desbrozadoras.The field of application of the present invention is framed within the sector of the industry dedicated to the manufacture of agricultural equipment and machinery, focusing particularly on the field of brushcutting machines.

ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION

Como referencia al estado actual de la técnica, cabe señalar que ya existen en el mercado maquinas con medios de corte que se acoplan a un vehículo tractor para cortar las malas hierbas que crecen en los árboles de cultivo y limitan una producción óptima de los mismos.As a reference to the current state of the art, it should be noted that there are already machines on the market with cutting means that are coupled to a vehicle tractor to cut the weeds that grow on the crop trees and limit their optimal production.

El problema de este tipo de máquinas es que, normalmente, los medios de corte quedan siempre a una altura determinada que ha de ser lo suficientemente baja para cortar la hierba pero que, al ser tan baja, suele afectar a los sistemas de riego, generalmente conformados por una conducción que transcurre sobre el suelo paralela a las hileras de árboles justo por donde pasa la desbrozadora, de manera que a menudo llega a romperlos, con el consiguiente perjuicio para el agricultor.The problem with this type of machine is that, normally, the cutting means always remain at a certain height that must be low enough to cut the grass but, being so low, it usually affects irrigation systems, generally made up of a conduit that runs on the ground parallel to the rows of trees just where the brush cutter passes, so that it often breaks them, with the consequent damage to the farmer.

El objetivo de la presente invención es, pues, el desarrollo de un mejorado tipo de máquina desbrozadora que evite dicha problemática mediante un sistema de brazo ajustable al terreno.The objective of the present invention is, therefore, the development of an improved type of brushcutting machine that avoids said problem by means of an arm system adjustable to the ground.

Por otra parte, al menos por parte del solicitante, se desconoce la existencia de ninguna otra máquina desbrozadora o similar que presente unas características técnicas y estructurales iguales o semejantes a las que presenta la que aquí se reivindica.On the other hand, at least on the part of the applicant, the existence of any other brushcutting or similar machine that presents technical and structural characteristics equal or similar to those presented herein is unknown.

EXPLICACIÓN DE LA INVENCIÓNEXPLANATION OF THE INVENTION

La máquina desbrozadora que la invención propone se configura como una solución idónea al objetivo anteriormente señalado, estando los detalles caracterizadores que lo hacen posible y que la distinguen convenientemente recogidos en las reivindicaciones finales que acompañan a la presente descripción.The brushcutting machine that the invention proposes is configured as an ideal solution to the aforementioned objective, the characterizing details that make it possible and that distinguish it conveniently included in the final claims that accompany the present description.

Concretamente, lo que la invención propone, como se ha apuntado anteriormente, es una máquina que, destinada a su acople a la parte posterior de un vehículo tractor, comprende unos medios de corte para desbrozar, es decir, eliminar hierbas o malas hierbas, en particular las que crecen a ras de suelo junto a las hileras de los árboles de cultivo, la cual se distingue, esencialmente, por comprender un brazo hidráulico, en el que se incorporan los medios corte, que puede subir y bajar y que cuenta con una rueda de apoyo gracias a la que puede ir ajustándose a las irregularidades del terreno, ayudando especialmente a que no tope nunca con las conducciones de los sistemas de riego que eventualmente puedan encontrarse sobre el suelo en su recorrido.Specifically, what the invention proposes, as noted above, is a machine that, intended to be coupled to the rear of a towing vehicle, comprises cutting means for clearing, that is to say, eliminating grasses or weeds, in particular those that grow at ground level next to the rows of crop trees, which is distinguished, essentially, by comprising a hydraulic arm, in which the media are incorporated cut, which can go up and down and that has a support wheel thanks to which it can adjust to the irregularities of the ground, helping especially to never run into the pipes of the irrigation systems that may eventually be found on the ground on your way.

Para ello, y más específicamente, la máquina de la invención comprende, esencialmente:For this, and more specifically, the machine of the invention essentially comprises:

- un brazo móvil mediante sistema hidráulico con, al menos, una posición horizontal de uso que, conformado por un chasis de perfiles metálicos con una rueda lateral de rodadura y otra central de apoyo, se une por dicho extremo lateral y de modo articulado a una estructura de soporte, también de perfilería metálica, dotada a su vez de ruedas y con la que se acopla al vehículo tractor,- A mobile arm by means of a hydraulic system with at least one horizontal position for use which, made up of a chassis of metal profiles with a lateral rolling wheel and a central support wheel, is joined at said lateral end and in an articulated manner to a support structure, also made of metal profiles, equipped in turn with wheels and with which it is coupled to the towing vehicle,

- unos medios de corte conformados por una pluralidad de platos de corte circulares acoplados al brazo por su parte inferior, y- cutting means formed by a plurality of circular cutting plates coupled to the arm at its lower part, and

- un sistema hidráulico que, alimentado por el fluido hidráulico o toma de fuerza del vehículo tractor, acciona, al menos, un cilindro para mover el brazo y que, preferentemente, comprende un depósito de aceite y un enfriador incorporados, de preferencia, en la estructura de soporte.- A hydraulic system that, fed by the hydraulic fluid or power take-off of the towing vehicle, operates at least one cylinder to move the arm and that preferably comprises an oil tank and a cooler incorporated, preferably in the support structure.

Preferentemente, los platos de corte circulares que conforman los medios de corte de la máquina están accionados de manera sincronizada mediante un sistema de tracción que, movido mediante un motor desde una polea primaria, hace girar respectivas poleas de arrastre asociadas mediante un plato de soporte a cada plato de corte circular, de modo que todos giran a la vez. Preferably, the circular cutting plates that make up the cutting means of the machine are driven in a synchronized manner by means of a traction system that, moved by means of a motor from a primary pulley, rotates respective drive pulleys associated by means of a support plate to each circular cutting deck, so that they all rotate at the same time.

Preferentemente, el brazo cuenta con tres o cuatro sistemas de platos de corte circulares asociados al sistema de tracción, cada uno de los cuales comprende, asociado a un eje de giro, un plato de soporte al chasis del brazo, una polea y un plato de corte, todos ellos unidos mediante correspondientes rodamientos, tapa y tornillo.Preferably, the arm has three or four systems of circular cutting plates associated with the traction system, each of which comprises, associated with a rotation axis, a support plate to the arm chassis, a pulley and a plate of cut, all of them joined by means of corresponding bearings, cover and screw.

Preferentemente, uno de los platos de corte está incorporado en el extremo distal de un tramo articulado del brazo que se une al tramo principal con un muelle retráctil e incluye un plato superior de mayor tamaño con el borde de goma, tal que actúa de tope al chocar con el tronco de los árboles provocando el retraimiento de dicho tramo distal del brazo, permitiendo que este abarque mayor terreno de actuación junto a los árboles.Preferably, one of the cutting plates is incorporated in the distal end of an articulated section of the arm that is attached to the main section with a retractable spring and includes a larger upper plate with a rubber edge, such that it acts as a stop to the colliding with the trunk of the trees causing the withdrawal of said distal section of the arm, allowing it to cover a larger area of action next to the trees.

En cualquier caso, de preferencia, cada uno de los citados platos de corte circulares alojan en su interior tres cuchillas de corte acopladas de modo que salen por velocidad centrifuga y que, en caso de topar con algo duro, se recogen, evitando así el lanzamiento de piedras u otros objetos.In any case, preferably, each of the aforementioned circular cutting plates houses inside three cutting blades coupled so that they come out at centrifugal speed and that, in case of hitting something hard, they are collected, thus avoiding the launch. of stones or other objects.

Por otra parte, en la forma de realización preferida, el brazo móvil se une a la estructura de soporte a través de un tramo articulado proximal que se une al tramo de brazo principal mediante una unión articulada con posibilidad de giro, permitiendo la elevación del brazo entre su posición horizontal de uso y una posición vertical de no uso, tal que ocupa menos espacio para su almacenamiento y traslado, estando dicho movimiento de elevación del brazo accionado a través del antedicho cilindro hidráulico.On the other hand, in the preferred embodiment, the mobile arm is attached to the support structure through a proximal articulated section that is attached to the main arm section through an articulated joint with the possibility of turning, allowing the arm to be raised. between its horizontal position of use and a vertical position of non-use, such that it occupies less space for storage and transfer, said lifting movement of the arm being actuated through the aforementioned hydraulic cylinder.

Además, de preferencia, el extremo opuesto de este tramo proximal del brazo móvil se une a la estructura de apoyo de la máquina a través de un travesaño en el que se desliza de un lado a otro gracias a una biela y a la acción de un segundo cilindro hidráulico, con lo cual el conjunto del brazo se puede situar en un lado u otro de la máquina y en cualquier punto intermedio según convenga, tanto en su posición vertical de reposo como en su posición horizontal de uso.In addition, preferably, the opposite end of this proximal section of the mobile arm is attached to the support structure of the machine through a crossbar in which it slides from one side to the other thanks to a connecting rod and the action of a second hydraulic cylinder, whereby the arm assembly It can be placed on one side or the other of the machine and at any intermediate point as appropriate, both in its vertical position of rest and in its horizontal position of use.

Por último, cabe destacar que, de preferencia, la estructura de soporte de la máquina también cuenta con dos ruedas distintas, una lateral de rodadura y una de apoyo.Finally, it should be noted that, preferably, the support structure of the machine also has two different wheels, one side for rolling and one for support.

Con todo ello, las ventajas de la máquina son múltiples, destacando especialmente la posibilidad de graduar la altura e inclinación del brazo a las necesidades del terreno en cada caso para adaptarse a eventuales inclinaciones y, especialmente, a la existencia de sistemas de riego para evitar que los rompa con las cuchillas.With all this, the advantages of the machine are multiple, especially highlighting the possibility of adjusting the height and inclination of the arm to the needs of the terrain in each case to adapt to eventual inclinations and, especially, to the existence of irrigation systems to avoid to break them with the blades.

Por su parte, la cuchilla distal, al estar incorporada en un tramo retráctil con un plato que hace de tope, además de abarcar mayor espacio de corte junto a los árboles se evita que estos puedan salir dañados.For its part, the distal blade, being incorporated in a retractable section with a plate that acts as a stop, in addition to covering a greater cutting space next to the trees, prevents them from being damaged.

DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS

Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, se acompaña a la presente memoria descriptiva, como parte integrante de la misma, unos planos en el que con carácter ilustrativo y no limitativo se ha representado lo siguiente:To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, the present specification is attached, as an integral part thereof, to some drawings in which, with an illustrative and non-limiting nature the following has been represented:

La figura número 1.- Muestra una vista esquemática en alzado frontal de un ejemplo de realización de la máquina desbrozadora objeto de la invención, la cual se ha representado con el brazo hidráulico en posición horizontal de uso; Figure number 1.- Shows a schematic view in front elevation of an example of embodiment of the brushcutting machine object of the invention, which has been represented with the hydraulic arm in a horizontal position for use;

las figuras número 2, 3 y 4.- Muestras respectivas vistas en alzado frontal del mismo ejemplo de la máquina desbrozadora, según la invención, mostrado en la figura 1, representada en respectivas fases de funcionamiento del brazo hidráulico para su posicionado desde una posición elevada de reposo a su posición de uso;Figures 2, 3 and 4.- Sample respective front elevation views of the same example of the brushcutting machine, according to the invention, shown in Figure 1, represented in respective operating phases of the hydraulic arm for its positioning from an elevated position from rest to its position of use;

la figura número 5.- Muestra una vista esquemática en sección y despiece de los principales elementos que comprende cada sistema de cuchillas circulares con que cuenta la máquina de la invención como medios de corte acoplados al brazo hidráulico;Figure number 5.- Shows a schematic sectional and exploded view of the main elements comprising each system of circular blades that the machine of the invention has as cutting means coupled to the hydraulic arm;

las figuras número 6, 7 y 8.- Muestran respectivas vistas en planta del soporte, la polea y el plato de corte que comprende el sistema de cuchillas mostrado en la figura 5; yFigures 6, 7 and 8.- Show respective plan views of the support, the pulley and the cutting plate comprising the blade system shown in Figure 5; and

la figura número 9.- Muestra una vista esquemática en alzado y sección del motor y la polea primaria que arrastran el sistema de cuchillas.Figure number 9.- Shows a schematic elevation and sectional view of the motor and the primary pulley that drive the blade system.

REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION

A la vista de las mencionadas figuras y de acuerdo con la numeración adoptada, se puede observar en ellas un ejemplo de realización no limitativa de la máquina desbrozadora de la invención, la cual comprende lo que se describe en detalle a continuación.In view of the aforementioned figures and in accordance with the numbering adopted, an example of a non-limiting embodiment of the brushcutting machine of the invention can be seen in them, which comprises what is described in detail below.

Así, tal como se observa en dichas figuras, la máquina (1) de la invención comprende, esencialmente:Thus, as seen in said figures, the machine (1) of the invention essentially comprises:

- un brazo (2) móvil hidráulico con, al menos, una posición horizontal de uso, conformado por un chasis de, al menos, un tramo principal (20) recto de perfiles metálicos con una rueda de rodadura (3) lateral, con neumáticos de cámara inflables, y una rueda de apoyo (4) central, formada por simples rodillos, y que se une por un extremo lateral y de modo articulado a una estructura de soporte (5) y acople al vehículo tractor (no representado), también de perfilería metálica y dotada a su vez, preferentemente, de sendas ruedas, una de rodadura (3) con cámara y otra de apoyo (4) en forma de rodillo, tal que dicho brazo (2) móvil sube y baja apoyado en la rueda central (4) de apoyo prevista en el mismo ajustándose a las irregularidades del terreno;- a mobile hydraulic arm (2) with at least one horizontal position for use, made up of a chassis of at least one main straight section (20) of metal profiles with a lateral rolling wheel (3), with inflatable tube tires, and a central support wheel (4), made up of simple rollers, and which is joined at a lateral end and in an articulated way to a support structure (5) and coupled to the towing vehicle (not shown) , also with metal profiles and preferably equipped with two wheels, one for rolling (3) with a camera and another for support (4) in the form of a roller, such that said mobile arm (2) raises and lowers supported on the central support wheel (4) provided therein adjusting to the irregularities of the ground;

- unos medios de corte conformados por una pluralidad de platos de corte circulares (6) acoplados al brazo (2) por su parte inferior; y- cutting means formed by a plurality of circular cutting plates (6) coupled to the arm (2) at its lower part; and

- un sistema hidráulico que acciona, al menos, un primer cilindro (7) para mover el brazo (2) y que comprende un depósito de aceite (8) y un enfriador (9) de fluido hidráulico incorporados, de preferencia, en la estructura de soporte (5);- A hydraulic system that operates at least a first cylinder (7) to move the arm (2) and that comprises an oil tank (8) and a hydraulic fluid cooler (9) preferably incorporated in the structure support (5);

Preferentemente, los platos de corte circulares (6) que conforman los medios de corte son accionadas de manera sincronizada mediante un sistema de tracción que comprende un motor (10) hidráulico asociado a una polea primaria (11) y diversas poleas de arrastre (12) que, vinculadas mediante una o dos correas (no mostradas en las figuras), preferentemente dos correas de configuración trapecial, giran con los platos circulares (6).Preferably, the circular cutting plates (6) that make up the cutting means are driven in a synchronized manner by means of a traction system comprising a hydraulic motor (10) associated with a primary pulley (11) and various drive pulleys (12) which, linked by one or two belts (not shown in the figures), preferably two belts of trapezoidal configuration, rotate with the circular plates (6).

Preferentemente, el brazo (2) incorpora hasta cuatro conjuntos de platos circulares (6) asociados al descrito sistema de tracción, cada uno de los cuales, como se observa en el despiece de la figura 5, comprende, asociado a su eje de giro, un plato de soporte (13) al chasis del brazo (2), una polea de arrastre (12) de doble carril y un plato de corte circular (6) propiamente dicho, estando dichos elementos unidos entre sí mediante sendos rodamientos (14) intercalados, uno entre el plato de soporte (13) y la polea (12), y otro entre la polea (12) y el plato de corte o cuchilla circular (6), y rematado con una tapa final (15) que sujeta el conjunto con un tornillo (16).Preferably, the arm (2) incorporates up to four sets of circular plates (6) associated with the described traction system, each of which, as seen in the exploded view of figure 5, comprises, associated with its axis of rotation, a support plate (13) to the arm chassis (2), a double rail drive pulley (12) and a circular cutting plate (6) itself, said elements being joined together by means of separate bearings (14) inserted , one between the support plate (13) and the pulley (12), and another between the pulley (12) and the cutting deck or circular blade (6), and finished off with an end cap (15) that holds the assembly with a screw (16).

Atendiendo a las figuras 6 a 8 se puede apreciar cómo, de preferencia, el plato de soporte (13) (figura 6) y la polea de arrastre (12) (figura 7), dotados respectivamente con cuatro taladros pasantes (17) y seis taladros roscados (18) para su fijación, son de menor diámetro que el plato de corte circular (6) que, a su vez, presenta seis taladros pasantes (17) en su centro para su fijación a la polea (12).Taking into account figures 6 to 8 it can be seen how, preferably, the support plate (13) (figure 6) and the drive pulley (12) (figure 7), respectively provided with four through holes (17) and six Threaded holes (18) for fixing them are smaller in diameter than the circular cutting plate (6) which, in turn, has six through holes (17) in its center for fixing to the pulley (12).

Preferentemente, el brazo (2) hidráulico de la máquina (1) incorpora uno de dichos conjuntos de plato de corte circular (6) acoplado en la parte inferior del extremo de un tramo distal (21) articulado de dicho brazo (2) que se une al tramo principal (20) con un muelle retráctil (no apreciable en las figuras) incluyendo, por la parte superior, un plato de mayor diámetro que dicha cuchilla circular (6) con el borde de goma que gira libre sobre el mismo eje que la cuchilla (6) definiendo un tope (19) retráctil, ya que, al chocar con el tronco de los árboles, evita que la cuchilla del plato de corte (6) los dañe y, a la vez, el mencionado muelle provoca el retraimiento de dicho tramo distal (21) del brazo (2).Preferably, the hydraulic arm (2) of the machine (1) incorporates one of said assemblies of circular cutting plate (6) coupled to the lower part of the end of an articulated distal section (21) of said arm (2) that is joins the main section (20) with a retractable spring (not noticeable in the figures) including, at the top, a plate of greater diameter than said circular blade (6) with the rubber edge that rotates freely on the same axis as the blade (6) defining a retractable stop (19), since, when colliding with the trunk of the trees, it prevents the blade of the cutting deck (6) from damaging them and, at the same time, the aforementioned spring causes retraction of said distal section (21) of the arm (2).

De preferencia, aunque no se ha representado en las figuras, cada uno de los platos de corte circulares (6) aloja en su interior, entre los dos discos que lo forman, tres cuchillas de corte acopladas mediante una unión móvil, tal que sobresalen por velocidad centrifuga y, en caso de topar con algo duro, se recogen.Preferably, although it has not been represented in the figures, each of the circular cutting plates (6) houses inside, between the two discs that form it, three cutting blades coupled by means of a mobile joint, such that they protrude through centrifugal speed and, in case of hitting something hard, they are collected.

Por otra parte, atendiendo a las figuras 1 a 4, se observa cómo, en la forma de realización preferida, el brazo (2) móvil se une a la estructura de soporte (5) a través de un tramo proximal (22) articulado que se une al tramo principal (20) de brazo (2) mediante una unión articulada con posibilidad de giro de hasta 90 ° entre el plano horizontal y el plano vertical, permitiendo la elevación del brazo (2) entre su posición horizontal de uso (figura 1) y una posición vertical de no uso (figuras 3 y 4), pasando por posiciones inclinadas intermedias (figura 2), tal que ocupa menos espacio para su almacenamiento y traslado, estando dicho movimiento de elevación del brazo (2) accionado a través del cilindro hidráulico (7).On the other hand, taking into account Figures 1 to 4, it is observed how, in the preferred embodiment, the mobile arm (2) is attached to the support structure (5) through an articulated proximal section (22) that it is joined to the main section (20) of the arm (2) by means of an articulated joint with the possibility of rotation of up to 90 ° between the horizontal plane and the vertical plane, allowing the lifting of the arm (2) between its horizontal position of use (figure 1) and a vertical position of non-use (figures 3 and 4), passing through inclined positions intermediate (figure 2), such that it takes up less space for storage and transfer, said lifting movement of the arm (2) being actuated through the hydraulic cylinder (7).

Pero además, de preferencia, el extremo opuesto del antedicho tramo proximal (22) del brazo (2) móvil se une a la estructura de apoyo (5) de la máquina mediante un travesaño (50) previsto en la parte anterior inferior de dicha estructura en el que, a través de una biela, se desliza de un lado a otro del mismo gracias a la acción de un segundo cilindro hidráulico (7), con lo cual el conjunto del brazo (2), como se observa en las figuras 1 ,3 y 4, se puede mover de posición respecto de la estructura (5) para situarlo en un lado u otro de la misma o en cualquier punto intermedio, según convenga, tanto en posición vertical de reposo como en posición horizontal de uso.But also, preferably, the opposite end of the aforementioned proximal section (22) of the mobile arm (2) is attached to the support structure (5) of the machine by means of a cross member (50) provided in the lower anterior part of said structure. in which, through a connecting rod, it slides from one side to the other thanks to the action of a second hydraulic cylinder (7), with which the arm assembly (2), as seen in figures 1 , 3 and 4, it can be moved in position with respect to the structure (5) to place it on one side or the other of it or at any intermediate point, as appropriate, both in a vertical position of rest and in a horizontal position of use.

Por último señalar que, preferentemente, las ruedas laterales (3) de rodadura, tanto del brazo (2) como, en su caso, de la estructura de soporte (5), son de altura regulable para adaptar la posición del conjunto a las necesidades de cada caso.Lastly, it should be noted that, preferably, the lateral rolling wheels (3), both of the arm (2) and, where appropriate, of the support structure (5), are height-adjustable to adapt the position of the set to the needs. of each case.

Descrita suficientemente la naturaleza de la presente invención, así como la manera de ponerla en práctica, no se considera necesario hacer más extensa su explicación para que cualquier experto en la materia comprenda su alcance y las ventajas que de ella se derivan. Having sufficiently described the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any expert in the field understands its scope and the advantages derived from it.

Claims

1. - Brushcutting machine which, intended to be attached to the rear of a tractor vehicle, and equipped with cutting means to remove grasses or weeds at ground level, is characterized by comprising:

- A mobile hydraulic arm (2) with at least one horizontal position for use, made up of a chassis of at least one main straight section (20) of metal profiles, with a lateral rolling wheel (3) and a Central support wheel (4) and which is joined by a lateral end and in an articulated way to a support structure (5) and coupled to the towing vehicle, such that said mobile arm (2) goes up and down supported on the central wheel ( 4) of support adjusting to the irregularities of the terrain;

- cutting means formed by a plurality of circular cutting plates (6) coupled to the arm (2) at its lower part; and

- A hydraulic system that operates at least a first cylinder (7) to move the arm (2) and that comprises an oil tank (8) and a cooler (9).

2. - Brush cutter according to claim 1, characterized in that the support structure (5) and coupling to the tractor vehicle, also made of metal profiles, is equipped with a rolling wheel (3) and a support (4).

3. - Brush cutter, according to claim 1 or 2, characterized in that the oil tank (8) and the cooler (9) are incorporated into the support structure (5).

4. - Brush cutter, according to any of the claims above, characterized in that the circular cutting plates (6) are actuated in a synchronized manner by means of a traction system comprising a hydraulic motor (10) associated with a primary pulley (11) and various drive pulleys (12) that, linked by means of one or two belts, rotate with the circular blades (6).

5. - Brush cutter according to claim 4, characterized in that the traction system comprises two trapezoidal configuration belts.

6. - Brush cutter, according to claim 4 or 5, characterized in that the arm (2) incorporates up to four sets of circular cutting plates (6) associated with the traction system, each of which comprises, associated with its axis of rotation, a support plate (13) to the arm chassis (2), a drive pulley (12) and a circular cutting plate (6) itself, said elements being joined together by bearings (14) sandwiched between them and an end cap (15) that holds the assembly with a screw (16).

7. - Brushcutter according to any of the preceding claims, characterized in that the hydraulic arm (2) incorporates a circular cutting plate (6) at the bottom of the end of a distal section (21) articulated that joins the main section (20) with a retractable spring including, at the top, a larger plate with a rubber edge that rotates freely defining a retractable stop (19).

8. - Brushcutter according to any of the preceding claims, characterized in that the mobile arm (2) is attached to the support structure (5) through an articulated proximal section (22) that is attached to the main section (20) arm (2) by means of an articulated joint with the possibility of turning up to 90 ° between the horizontal plane and the vertical plane, allowing the lifting of the arm (2) between its horizontal position of use and a vertical position of non-use, passing through intermediate inclined positions, said lifting movement of the arm (2) being actuated through a hydraulic cylinder (7).

9. - Brushcutter according to claim 8, characterized in that the opposite end of the proximal section (22) of the mobile arm (2) is attached to the support structure (5) by means of a crossbar (50) of the lower anterior part in which, through a connecting rod, slides from one side of it to the other thanks to the action of a second hydraulic cylinder (7).

10. - Brush cutter, according to any of the preceding claims, characterized in that the lateral wheels (3) rolling the arm (2), and where appropriate the support structure (5), are height adjustable.

11. - Brushcutting machine according to any of the preceding claims, characterized in that the circular cutting plates (6) house inside three cutting blades coupled by means of a mobile joint, such that they protrude by centrifugal speed and, in the event of encountering something hard, they are collected.