Weed removal device.

Abstract

Title: Weed removal device The invention relates to a weed removal device that can be attached to a tractor. It comprises a chassis (3) carried by the tractor (2), on which are mounted: - on the one hand a rotor (4) comprising a transverse shaft (40), driven in rotation in the direction of rotation of the wheels (20) of the tractor (2) and at a higher rotational speed, carrying juxtaposed radial arms (5), angularly offset in pairs, and the end of each of which is made up of a curved sole (50), of concentric curvature to the shaft (40), - and on the other hand, behind and under the rotor (4), two juxtaposed rollers (6, 7), whose axes are carried by a circle (B) concentric to the shaft (40) and such that the rollers (6, 7), which rotate in the opposite direction to that of the rotor (4), are flush with the soles (50), the one of the rollers (6, 7) arranged lower, extending close to the ground (S).Figure for the abridged version: Fig. 1.

Description

Title of the invention: Weed removal device.

[0001] The present invention relates to a weed-pulling device, attachable to a tractor.

[0002] Due to new environmental standards, weed removal can no longer be carried out using treatment products; it can only be carried out mechanically, and essentially manually.

[0003] With regard to large agricultural areas, there is no tool allowing mechanized uprooting, and manual uprooting is not profitable.

[0004] The present invention aims to remedy this deficiency by proposing a weed-pulling device that can be attached to a tractor.

[0005] The weed-pulling device attachable to a tractor according to the invention is characterized in that it comprises a chassis carried by said tractor, on which are mounted:

[0006] - on the one hand a rotor comprising a transverse shaft, driven in rotation in the direction of rotation of the wheels of said tractor and at a higher rotational speed, carrying juxtaposed radial arms, angularly offset in pairs, and the end of each of which is made up of a curved sole, with a curvature concentric to said shaft,

[0007] - and on the other hand, behind and below said rotor, two juxtaposed rollers, whose axes are carried by a concentric circle around said shaft and such that said rollers, which rotate in the opposite direction to that of said rotor, are flush with said soles, the one of said rollers arranged lowest, extending close to the ground.

[0008] It will be understood that in use, initially the lowest roller and then the second roller tend to lift the grass, while the rotor soles pinch the grass against said rollers, and due to the difference in rotational speed, the grass is uprooted.

[0009] According to an additional feature of the tearing device according to the invention, the radial arms consist of diametrical arms, comprising two diametrically opposed soles.

[0010] According to another additional feature of the tear-off device according to the invention, each of the soles is covered with an elastic lining.

[0011] The elastic lining may consist of a rubber plate or similar material; it ensures that the grass is wedged against the rollers.

[0012] According to another additional feature of the uprooting device according to the invention, the rotation of the rollers is ensured by contact with the soles, through the jammed grass.

[0013] According to another additional feature of the harvesting device according to the invention, the rotor comprises a succession of regularly spaced flanges and carrying, in pairs, radial arms.

[0014] According to another additional feature of the harvesting device according to the invention, the rotation speed of the rotor is controlled by the speed of movement of the tractor.

[0015] The advantages and characteristics of the lifting device according to the invention will become clearer from the following description, which relates to the attached drawing, which represents a non-limiting embodiment thereof.

[0016] In the attached drawing:

[0017] [Fig-1] represents a schematic partial profile view of the weed-pulling device according to the invention.

[0018] [Fig.2] represents in perspective part of the same lifting device.

[0019] [Fig.3] represents a schematic partial profile view of a part of the same device.

[0020] With reference to [Fig.1], a weed-pulling device 1 according to the invention can be seen, attached to the rear of a tractor 2, and pulled by it in the direction A.

[0021] This weed-pulling device 1 comprises a frame 3 carrying a transverse rotor 4 mounted in rotation on a shaft 40, in the same direction R as the wheels 10 of the tractor 1, and driven by motor means not shown.

[0022] With reference also to [Fig.2], it can be seen that the rotor 4 comprises a succession of regularly spaced flanges 41 and carrying, in pairs, radial arms 5.

[0023] By way of exception, two adjacent flanges 41 carry between them two diametrically opposed radial arms 5. Each arm 5 has at its free end a flange 50 of width corresponding to the spacing between the two flanges 41, and of a curvature concentric to the shaft 40, so that in rotation the flanges 50 are inscribed in a circle C.

[0024] From a construction point of view, each arm 5 comprises two plates 51 and 52 attached to the base 50, and each attachable to a flange 41.

[0025] On a pair of flanges 41 are therefore fixed two diametrically opposed arms 5, while one of the flanges 41 of this pair of flanges 41 carries, with the following flange 41, two other diametrically opposed arms 5 but angularly offset with respect to the two neighboring arms 5, in this case, not limited to, 90°.

[0026] This offset is of course linked to the dimensions of the soles 50, so that on [Fig.1], we can see that this offset is 45°.

[0027] With reference also to [Fig. 3], it can be seen that the tearing device of weeds according to the invention also includes two rollers 6 and 7, arranged transversely behind the rotor 4 and below it near the ground S, mounted in free rotation on shafts 60 and 70 respectively, whose axes are carried by a circle B concentric to the shaft 40, while these rollers 6 and 7 are tangent to the circle C, i.e. to the soles 50, the roller 6 being arranged closest to the ground S.

[0028] During the movement of the assembly, the roller 6, then the roller 7 pass under the grass to be pulled up, while the soles 50, according to the rotation of the rotor 4, come to wedge this grass against the rollers 6 and 7, to pull it up and project it behind the rotor 4.

[0029] The rollers 6 and 7 as well as the rotor 4 are adjusted in height so as not to come into contact with the ground S, and so that the area at the level of which the soles 50 come into contact with the rollers 6 and 7, coincides with the size of the grass to be pulled up.

[0030] It should be noted that advantageously, the soles 50 are each equipped with a lining 53 made of a flexible material of the elastomer or rubber type, allowing the grass to be properly wedged against the rollers 6 and 7.

[0031] The rotation speed of the rotor 4 is such that the linear speed of the soles 50 is greater than the linear speed of the tractor 2, and especially suitable for treating the entire grassed area, knowing that the soles 50 are diametrically opposed.

[0032] That being said, it is possible to provide that the rotation speed of the rotor 4 is controlled by the movement speed of the tractor 2.

Claims

Demands

1. A weed-pulling device attachable to a tractor, characterized in that it comprises a frame (3) carried by said tractor (2), on which are mounted: - on the one hand, a rotor (4) comprising a transverse shaft (40), driven in rotation in the direction of rotation of the wheels (20) of said tractor (2) and at a higher rotational speed, carrying juxtaposed radial arms (5), angularly offset in pairs, and the end of each of which is formed by a curved plate (50) with a curvature concentric to said shaft (40), - and on the other hand, behind and below said rotor (4), two juxtaposed rollers (6, 7), the axes of which are carried by a circle (B) concentric to said shaft (40), and such that said rollers (6, 7), which rotate in the opposite direction to that of said rotor (4), are flush with said plates (50), that of said rollers (6, 7) arranged lowest, extending close to the ground (S).

2. Pulling device (1) according to claim 1, characterized in that the radial arms (5) consist of diametrical arms, comprising two diametrically opposed soles (50).

3. Pulling device (1) according to claim 1 or claim 2, characterized in that each of the soles (50) is covered with an elastic lining (53).

4. Pulling device (1) according to any one of claims 1 to 3, characterized in that the rotation of the rollers (6, 7) is ensured by contact with the soles (50), through the jammed grass.

5. Pulling device (1) according to any one of claims 1 to 4, characterized in that the rotor (4) comprises a succession of regularly spaced flanges (41) and carrying, in pairs, radial arms (5).

6. Pulling device (1) according to any one of claims 1 to 5, characterized in that the rotational speed of the rotor (4) is controlled by the movement speed of the tractor (2).

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