ES2674972B1 - TOOL FOR COUPLING AN AGRICULTURAL VEHICLE - Google Patents

TOOL FOR COUPLING AN AGRICULTURAL VEHICLE Download PDF

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ES2674972B1
ES2674972B1 ES201730004A ES201730004A ES2674972B1 ES 2674972 B1 ES2674972 B1 ES 2674972B1 ES 201730004 A ES201730004 A ES 201730004A ES 201730004 A ES201730004 A ES 201730004A ES 2674972 B1 ES2674972 B1 ES 2674972B1
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vehicle
frame
nacelles
tool
straightening
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ES2674972A1 (en
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Morcillo Francisco Gallego
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B31/00—Drags graders for field cultivators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/815—Blades; Levelling or scarifying tools

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Machines (AREA)
  • Body Structure For Vehicles (AREA)

Description

DESCRIPCIONDESCRIPTION

HERRAMIENTA PARA ACOPLAR A UN VEHICULO AGRICOLATOOL FOR COUPLING AN AGRICULTURAL VEHICLE

La presente invenci6n se refiere a una herramienta para acoplar a un vehiculo agricola, en particular a una herramienta alisadora acoplable a la parte delantera de un vehiculo con el fin de preparar el terreno al paso de las ruedas del vehiculo. The present invention relates to a tool for coupling an agricultural vehicle, in particular to a planing tool coupled to the front of a vehicle in order to prepare the ground to the passage of the wheels of the vehicle.

A menudo los terrenos son muy irregulares y presentan piedras y terrones que dificultan el paso de las ruedas de un vehiculo, provocando dafios en los neumdticos, vibraciones incbmodas, problemas de traccibn y deterioro de los sistemas de suspensibn de los vehiculos, limitando la velocidad de trabajo y aumentando el coste debido tanto al mayor consumo de combustible como a la necesidad de mantenimiento.Often the terrains are very irregular and have stones and clods that make it difficult for a vehicle's wheels to pass through, causing damage to tires, incisive vibrations, traction problems and deterioration of vehicle suspension systems, limiting the speed of the vehicle. work and increasing the cost due to both higher fuel consumption and the need for maintenance.

A la hora de trabajar con estos vehiculos seria deseable que el terreno estuviera en las mejores condiciones posibles en referenda al allanado del terreno, sin obstbculos tales como piedras o terrones.When working with these vehicles it would be desirable that the land be in the best possible conditions in reference to the paving of the land, without obstacles such as stones or clods.

En el documento ES1142283U se describe un apero agricola, previsto para su aplicacibn en maquinas formadora de lomos o caballones para el cultivo de productos hortofruticolas que incluye un bastidor portador de dos puntales verticales, cada uno dotado inferiormente de un disco para el volteo y triturado de la tierra del surco realizado por la mbquina formadora de lomos, disponiendose tras los discos otro puntal portador de una placa o plancha horizontal curvada hacia arriba en correspondencia con su extremidad anterior de altura suficiente como para permitir alisar la tierra previamente tratada por los discos del apero. Document ES1142283U discloses an agricultural implement, intended for application in machines for forming loins or ridges for the cultivation of horticultural products that includes a frame carrying two vertical struts, each one provided with a disc for turning and crushing the bottom. the ground of the groove made by the loin-forming machine, having placed behind the discs another strut bearing a plate or horizontal plate curved upwards in correspondence with its front end of sufficient height to allow smoothing the previously treated soil by the discs of the implement .

Igualmente, en el documento ES1140083U se describe un descompactador que incluye un rodillo frontal con discos cortantes, seguido de un conjunto de brazos subsoladores graduables en altura y con botas intercambiables, seguido de un rodillo metblico liso aplanador con puas.Similarly, document ES1140083U discloses a decompactor including a front roller with cutting discs, followed by a set of subsoiler arms adjustable in height and with interchangeable boots, followed by a smooth flat roller with spikes.

Estos documentos conocidos describen elementos de conseguir un alisado del terreno tras una labor agricola, por lo que no son utiles para la preparation del terreno agricola en el sentido indicado anteriormente. These known documents describe elements of achieving a smoothing of the land after an agricultural work, so they are not useful for the preparation of agricultural land in the sense indicated above.

Por su parte, el documento ES0291734U describe una maquina desterronadora y aplanadora de terrenos para su arrastre por tractor, determinada por un bastidor en forma de "T" cuyo tramo transversal es una viga rematada en sus extremos en sendas cartelas ortogonales entre las que queda tendido un eje horizontal que soporta una pluralidad de ruedas trituradoras de dientes y ruedas de cuchilla, alternadamente dispuestas y situadas entre dos ruedas de tope extremas, existiendo un soporte intermedio de apoyo del eje y una anilla de tiro fijada a uno de los extremos de dicha viga, para el transporte del conjunto al preverse en el extremo opuesto dos placas soporte de sujecidn de un eje de ruedas plegado en "U" de alas abiertas; estando determinado el tramo principal del bastidor en "T", por otra viga que incluye en su extremo libre otra anilla de tiro para la camera de trabajo de la m£quina al ser elevadas las rizadas de apoyo a trav6s de una articulacion en las placas soporte de su eje en "U" y descansar en el suelo las ruedas de dientes y cuchillas.On the other hand, the document ES0291734U describes a soil breaking and leveling machine for traction by tractor, determined by a "T" frame whose transversal section is a beam finished off at its ends in orthogonal brackets between which it is laid a horizontal axis supporting a plurality of tooth grinding wheels and blade wheels, alternately arranged and located between two end stop wheels, there being an intermediate support for the shaft and a pull ring fixed to one end of said beam , for the transport of the assembly when two support plates of a wheel axle folded in "U" with open wings are provided at the opposite end; the main section of the "T" frame being determined, by another beam that includes at its free end another pull ring for the working chamber of the machine when the support curls are raised through a joint in the plates support your "U" axis and rest on the ground the wheels of teeth and blades.

Por tanto, el objetivo de la presente invencion es proporcionar una herramienta acoplable a la parte delantera de un vehiculo con el fin de preparar el terreno para el paso de las ruedas de dicho vehiculo.Therefore, the objective of the present invention is to provide a tool that can be attached to the front of a vehicle in order to prepare the ground for the passage of the wheels of said vehicle.

Este objetivo se logra segun la invencidn mediante una herramienta acoplable a la parte delantera de un vehiculo a traves de un chasis, incluyendo la herramienta dos barquillas de alisado que, en uso, entran en contacto con el terreno por su parte inferior, y dispuestas por delante de las ruedas del vehiculo, de forma que dicha parte inferior de las barquillas, de forma esencialmente en proa de barco, alisa el terreno y evacua piedras y terrones lateralmente antes del paso de las ruedas.This object is achieved according to the invention by means of a tool that can be attached to the front of a vehicle through a chassis, the tool including two smoothing naves which, in use, come into contact with the ground at their lower part, and arranged by in front of the wheels of the vehicle, so that said lower part of the nacelles, essentially in the bow of the ship, smoothes the ground and evacuates stones and lumps laterally before the passage of the wheels.

A continuacion se describe la invencidn en base a una forma de realizacidn de la misma y con referenda a las figuras adjuntas, en las cuales:The invention is described below on the basis of one embodiment thereof and with reference to the appended figures, in which:

Fig. 1: Vista en perspectiva de la herramienta de la invencion segun una forma de realization de la misma.Fig. 1: Perspective view of the tool of the invention according to a form of realization thereof.

Fig. 2: Vista lateral de la herramienta de la fig. 1. Fig. 2: Side view of the tool of fig. one.

Fig. 3: Vista posterior de una barquilla de alisado de acuerdo con la realization de la fig. 1.Fig. 3: Rear view of a straightening nacelle according to the embodiment of fig. one.

En la presente descripcibn, los tbrminos “alisado del terreno” se refieren a un terreno esencialmente liso, esencialmente sin irregularidades y sin piedras sueltas o terrones, de forma que la rodadura del vehiculo sea lo mbs uniforme posible, sin que las ruedas resbalen o se deslicen, mejorando la traccibn y minimizando el desgaste de los neumbticos.In the present description, the terms "ground smoothing" refer to essentially smooth terrain, essentially without irregularities and without loose stones or lumps, so that the rolling of the vehicle is as uniform as possible, without the wheels slipping or falling. slide, improving the traction and minimizing the wear of the neumbticos.

Tal como se observa en las figuras, la herramienta de la invention estb conformada en base a un bastidor de herramienta (1) acoplable a un vehiculo, bien directamente a su chasis, bien a travbs del chasis de una pala o bien a traves del chasis de un elevador, en todo caso en la parte delantera del vehiculo.As seen in the figures, the tool of the invention is formed on the basis of a tool frame (1) coupled to a vehicle, either directly to its chassis, either through the chassis of a shovel or through the chassis of an elevator, in any case in the front of the vehicle.

El bastidor (1) estb conformado por un primer armazon (2) esencialmente rectangular que se prolonga lateralmente hacia su parte posterior, esto es hacia el vehiculo, mediante correspondientes escuadras laterales (3, 4), definiendo asi dos caras laterales triangulares acopladas al primer armazon. Este primer armazbn (2) incluye asimismo dos travesafios (5, 6) paralelos a los laterales verticales del armazbn (2) que sirven como refuerzo del bastidor (1) y como base para dos proyecciones triangulares (7, 8) que se extienden tambibn hacia la parte posterior del bastidor (1), en direccibn al vehiculo, proyecciones (7, 8) que se unen a las caras laterales (3, 4) antes citadas.The frame (1) is formed by a first essentially rectangular frame (2) that extends laterally towards its rear part, that is towards the vehicle, by corresponding lateral brackets (3, 4), thus defining two triangular side faces coupled to the first frame. This first frame (2) also includes two crosspieces (5, 6) parallel to the vertical sides of the frame (2) which serve as reinforcement of the frame (1) and as a base for two triangular projections (7, 8) which also extend to towards the rear of the frame (1), in the direction of the vehicle, projections (7, 8) that join the side faces (3, 4) mentioned above.

Desde el lado inferior de las caras laterales triangulares (3, 4) se proyectan verticalmente hacia abajo sendos soportes (9, 10) que terminan en correspond ientes barquillas de alisado (11, 12).From the lower side of the triangular side faces (3, 4) are projected vertically downwards supports (9, 10) that end in corresponding straightening nacelles (11, 12).

Estas barquillas de alisado (11, 12) tienen esencialmente una forma triangular hueca delimitada por dos paredes laterales (13, 14) acopladas formando un bngulo agudo por su parte delantera y abierta por su parte trasera, para evitar los obstaculos de la rodadura, ya que unicamente eliminan obstbculos de la rodadura debido a esa forma rectangular, incluyendo justo detras una placa de fondo triangular (15) fundamental para el desarrollo de esta herramienta ya que continua el camino abierto por las barquillas, alisando el terreno y manteniendo la nivelacibn de las barquillas. Esta placa de fondo (15) se conforma esencialmente en forma de proa de barco, presentando al menos dos angulos de inclinacibn diferentes con respecto a la normal (perpendicular al terreno). Como se observa en la figura, un primer angulo proximal al vbrtice del tribngulo definido por las caras laterales (13, 14) y un segundo angulo distal a dicho vbrtice, definiendo asi para la placa de fondo (15) un disefio biselado en lo que constituiria un borde de ataque de las barquillas de alisado (11, 12).These straightening nacelles (11, 12) essentially have a hollow triangular shape delimited by two side walls (13, 14) coupled to form a sharp angle at the front and open at the rear, to avoid obstacles of rolling, and that only eliminate obstacles of the rolling due to that rectangular shape, including just behind a triangular bottom plate (15) fundamental for the development of this tool as it continues the path opened by the nacelles, smoothing the ground and maintaining the leveling of the nacelles. This bottom plate (15) is essentially shaped as a ship's bow, having at least two different inclination angles with respect to the normal (perpendicular to the ground). As shown in the figure, a first angle proximal to the edge of the triangle defined by the side faces (13, 14) and a second angle distal to said corner, thus defining for the bottom plate (15) a beveled design in which would constitute a leading edge of the straightening nacelles (11, 12).

Las paredes laterales (13, 14) de las barquillas de alisado (11, 12), en particular su borde superior, constituyen un borde de fuga que coopera con sendas orejetas (16, 17) que se proyectan ligeramente hacia afuera desde la zona terminal de dicho borde superior.The side walls (13, 14) of the straightening nacelles (11, 12), in particular their upper edge, constitute a trailing edge that cooperates with respective lugs (16, 17) projecting slightly outwards from the terminal area of said upper edge.

Adembs, como se puede observar en la figura 3 en particular, la placa de fondo (15) de las barquillas de alisado (11, 12) incluye una proyeccibn rectangular plana (20) que se proyecta hacia la zona de las ruedas del vehiculo de forma esencialmente paralela al suelo y en uso que compacta, alisa y nivela el terreno y facilita la nivelacibn de las barquillas (11, 12). Como se observa en dicha figura 3, el borde lineal de la proyeccibn (20) mbs cercano a las ruedas presenta una configuracibn ligeramente plegada hacia arriba con respecto al piano de la placa de fondo (15).Furthermore, as can be seen in FIG. 3 in particular, the bottom plate 15 of the straightening nacelles 11, 12 includes a flat rectangular projection 20 projecting towards the area of the wheels of the vehicle. essentially parallel to the ground and in use that compacts, smoothes and levels the ground and facilitates the leveling of the nacelles (11, 12). As seen in said figure 3, the linear edge of the projection (20) closer to the wheels has a configuration slightly folded upwards with respect to the piano of the bottom plate (15).

Igualmente, el bastidor de herramienta (1) acoplable al vehiculo incluye correspondientes medios de anclaje liberates para el acoplamiento de la herramienta de la invencibn a la parte delantera del chasis del vehiculo, o al chasis de una pala o al chasis de un elevador.Similarly, the tool frame (1) attachable to the vehicle includes corresponding free anchoring means for coupling the tool of the invention to the front of the vehicle chassis, or to the chassis of a shovel or to the chassis of an elevator.

En una realizacibn, entre los soportes (9, 10) y los extremos opuestos al vertice de las barquillas (11, 12) se disponen unos nervios de refuerzo (18, 19) con el fin de mantener la integridad estructural y formal de las barquillas (11, 12) cuando bstas estbn en uso.In one embodiment, between the supports (9, 10) and the ends opposite the vertex of the nacelles (11, 12) there are reinforcing ribs (18, 19) in order to maintain the structural and formal integrity of the nacelles (11, 12) when they are in use.

En otra realizacibn de la invencibn, las barquillas de alisado (11, 12) incluyen adembs un medio de corte (no mostrado) en su vbrtice delantero con el fin de fracturar o cortar el terreno en cooperation con la superficie inferior de las baquillas.In another embodiment of the invention, the straightening nacelles (11, 12) further include a cutting means (not shown) in its front vortex in order to fracture or cut the ground in cooperation with the lower surface of the baquillas.

El material con el que estbn hechas las barquillas, al menos su parte inferior en contacto con el terreno, preferentemente es un material metblico de aleaciones diversas, de gran dureza, durabilidad y muy resistentes al desgaste.The material with which the nacelles are made, at least the lower part in contact with the ground, is preferably a metal material of various alloys, of great hardness, durability and very resistant to wear.

Tal como se desprende de la anterior descripcibn de la herramienta alisadora acoplable a la parte delantera de un vehiculo, esta permite preparar el terreno para el paso de las ruedas del vehiculo eliminado obstaculos y mejorando su traccibn, lo cual, adembs de las ventajas antes indicadas, permite que, en la mayoria de los terrenos, la velocidad de trabajo puede superarse en un orden del 25% al 40%,provocado por la eliminacibn de las irregularidades del terreno, al eliminar las piedras u obstaculos que encuentra en el camino, la herramienta consigue que la velocidad se mantenga y evita ser frenado por estos obstaculos mencionados, reduciendo igualmente el consumo de combustible hasta en un 20%. As can be seen from the above description of the smoothing tool that can be attached to the front of a vehicle, it allows to prepare the ground for the passage of the wheels of the vehicle, eliminating obstacles and improving its traction, which, in addition to the advantages indicated above , allows that, in most of the terrains, the speed of work can be exceeded in an order of 25% to 40%, caused by the elimination of the irregularities of the land, by eliminating the stones or obstacles found on the road, the tool ensures that the speed is maintained and avoids being braked by these mentioned obstacles, also reducing fuel consumption by up to 20%.

Claims (1)

REIVINDICACIONES Herramienta para acoplar a un vehiculo, caracterizada porque esta conformada en base a un bastidor de herramienta (1) acoplable a la parte delantera de un vehiculo, incluyendo el bastidor (1) dos barquillas de alisado (11, 12) que entran en contacto con un terreno por su parte inferior, de forma esencialmente triangular hueca, delimitada por dos paredes laterales (13, 14) acopladas formando un Angulo agudo por su parte delantera y abierta por su parte trasera, incluyendo una placa de fondo triangular (15), proyectbndose dicha placa de fondo (15) hacia la zona de las ruedas del vehiculo de forma esencialmente paralela al suelo para definir una proyeccibn rectangular plana (20) cuyo borde lineal mbs cercano a las ruedas presenta una configuracibn ligeramente plegada hacia arriba con respecto al piano de la placa de fondo (15).Tool for coupling a vehicle, characterized in that it is formed on the basis of a tool frame (1) coupled to the front of a vehicle, including the frame (1) two straightening nacelles (11, 12) that come in contact with a ground in its lower part, essentially hollow triangular in shape, delimited by two side walls (13, 14) coupled to form an acute angle on the front and open at the rear, including a triangular bottom plate (15), projecting said bottom plate (15) towards the area of the wheels of the vehicle essentially parallel to the ground to define a flat rectangular projection (20) whose linear edge closer to the wheels has a configuration slightly folded upwards with respect to the piano the bottom plate (15). Herramienta para acoplar a un vehiculo segun la reivindicacibn 1, caracterizada porque las barquillas de alisado (11, 12) tienen esencialmente forma de proa de barco, presentando al menos dos angulos de inclinacibn diferentes con respecto a la normal al terreno, un primer bngulo proximal al vbrtice del tribngulo definido por las caras laterales (13, 14) y un segundo bngulo distal al vbrtce de ese triangulo definido por las caras laterales(13,14), definiendo asi para la placa de fondo (15) un disefio biselado en lo que constituiria un borde de ataque de las barquillas de alisado (11,12).Tool for coupling a vehicle according to claim 1, characterized in that the straightening nacelles (11, 12) are essentially ship's bow shape, having at least two different inclination angles with respect to the normal to the ground, a first proximal angle at the corner of the triangle defined by the lateral faces (13, 14) and a second angle distal to the vbrtce of that triangle defined by the lateral faces (13,14), thus defining for the bottom plate (15) a beveled design in the that would constitute an edge of attack of the straightening nacelles (11,12). Herramienta segun la reivindicacibn 1, caracterizada porque el bastidor (1) estb conformado por un primer armazbn (2) esencialmente rectangular que se prolonga lateralmente hacia su parte posterior, hacia el vehiculo, mediante correspondientes escuadras laterales (3, 4), definiendo asi dos caras laterales triangulares acopladas al primer armazbn, incluyendo este primer armazbn (2) dos travesafios (5, 6) paralelos a los laterales verticales del mismo que sirven como refuerzo del bastidor (1) y como base para dos proyecciones triangulares (7, 8) que se extienden tambibn hacia la parte posterior del bastidor (1), en direccibn al vehlculo, proyecciones (7, 8) que se unen a las caras laterales (3, 4) antes citadas.Tool according to claim 1, characterized in that the frame (1) is formed by a first essentially rectangular frame (2) that extends laterally towards its rear, towards the vehicle, by corresponding lateral brackets (3, 4), thus defining two triangular side faces coupled to the first frame, including this first frame (2) two crosspieces (5, 6) parallel to the vertical sides thereof that serve as reinforcement of the frame (1) and as a basis for two triangular projections (7, 8) which extend also towards the rear of the frame (1), in the direction of the vehicle, projections (7, 8) that join the side faces (3, 4) mentioned above. 4. Herramienta segun la reivindicacibn 3, caracterizada porque desde el lado inferior de las caras laterales triangulares (3, 4) se proyectan verticalmente hacia abajo sendos soportes (9, 10) que terminan en las correspondientes barquillas de alisado (11, 12). 4 Tool according to claim 3, characterized in that from the lower side of the triangular side faces (3, 4) are projecting vertically downwards supports (9, 10) that end in the corresponding straightening nacelles (11, 12). 5. Herramienta segun las reivindicaciones 1 o 2, caracterizada porque las paredes laterales (13, 14) de las barquillas de alisado (11, 12), en particular su borde superior, constituyen un borde de fuga que coopera con sendas orejetas (16, 17) que se proyectan ligeramente hacia afuera desde la zona terminal de dicho borde superior.Tool according to claims 1 or 2, characterized in that the side walls (13, 14) of the straightening nacelles (11, 12), in particular their upper edge, constitute a trailing edge which cooperates with respective lugs (16, 17) projecting slightly outwards from the terminal area of said upper edge. 6. Herramienta segun la reivindicacibn 1, caracterizada porque el bastidor de herramienta (1) acoplable al vehlculo incluye correspondientes medios de anclaje liberables para el acoplamiento de la herramienta a la parte delantera del chasis de un vehlculo o al chasis de una pala o al chasis de un elevador. 6. Tool according to claim 1, characterized in that the tool frame (1) engageable to the vehicle includes corresponding releasable anchoring means for coupling the tool to the front part of a vehicle chassis or to the chassis of a shovel or to the chassis of an elevator. 7. Herramienta segun la reivindicacibn 4, caracterizada porque entre los soportes (9, 10) y los extremos opuestos al vertice de las barquillas (11, 12) se disponen unos nervios de refuerzo (18, 19) con el fin de mantener la integridad estructural y formal de las barquillas (11, 12) cuando estas estbn en uso.7. Tool according to claim 4, characterized in that reinforcement ribs (18, 19) are arranged between the supports (9, 10) and the ends opposite the vertex of the nacelles (11, 12) in order to maintain integrity structural and formal of the nacelles (11, 12) when they are in use. 8. Herramienta segun la reivindicacibn 1, caracterizada porque las barquillas de alisado (11, 12) incluyen adembs un medio de corte en su vbrtice delantero con el fin de fracturar o cortar el terreno en cooperacibn con la superficie inferior de las baquillas. 8. A tool according to claim 1, characterized in that the straightening nacelles (11, 12) also include a cutting means in its front vortex in order to fracture or cut the ground in cooperation with the lower surface of the baffles.
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ES1237249Y (en) * 2019-08-23 2020-02-12 Morcillo Francisco Gallego ROLLING MATS SKATES

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NL6812861A (en) * 1968-09-09 1970-03-11
US3548956A (en) * 1969-01-24 1970-12-22 Eli Hochstetler Scraper attachment for garden tractors
NL7810460A (en) * 1978-10-18 1980-04-22 Berend Jan Van Lenthe Agricultural soil levelling implement - has two V=shaped scraper blades facing opposite ways and of different dimensions

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