WO2023285699A1

WO2023285699A1 - Machine and method for preparing the soil

Info

Publication number: WO2023285699A1
Application number: PCT/EP2022/069964
Authority: WO
Inventors: Sébastien LEGRAND
Original assignee: Rotadairon
Priority date: 2021-07-16
Filing date: 2022-07-15
Publication date: 2023-01-19

Abstract

Method for preparing the soil comprising a step of stripping the soil and then a subsequent step of burying stones by means of a horizontal rotor (20) rotated by a motor and provided with transverse blades at the periphery of the rotor that are configured to pierce the soil and raise the earth and the stones, and a grid (40) returning the stones towards the soil and by contrast allowing the earth to pass through, so as to bury the stones and to constitute a layer of earth without stones at the surface of the prepared soil as the rotor advances over the soil to be prepared. The stripping step is carried out by means of an added assembly (200) of longitudinal blades temporarily placed around the rotor (20).

Description

soil preparation machine and method

The invention falls within the field of soil preparation machines and soil preparation methods, for obtaining a surface of land that can be turfed and having an appearance that is preferentially homogeneous in space and constant in the time.

Prior art

Soil preparation machines are known that are moved by a multi-tool carrier with tracks or tires (a compact loader or skid steer in English) and which over a given width, work the soil using curved blades, at right angles. or in V turning around a horizontal rotor to which they are fixed. These blades are called stone burying blades or anti-sole blades and they pierce the ground vertically at several intervals from each other, and eject the earth and stones upwards. The stones are quickly returned downwards by grids arranged around the rotor, these grids on the contrary allowing the earth to pass through. This is how, quite quickly, the stones are buried and only fine soil remains on the surface.

This system therefore makes it possible to leave only fine soil on the surface, allowing a pleasant finish for the treated surface, which can then be used as a leisure surface, for sport or pleasure, by receiving a lawn. These machines are called diggers because they bury the stones.

Nevertheless currently the treatment of such a surface of land is generally carried out in several stages with tools intervening successively, which constitutes a rather heavy treatment. It is first necessary to remove the grass and the root system, saving as much nutrient-rich soil or topsoil as possible.

First, the landscaper uses a hydraulic bucket excavator, as shown in . Using this tool, he performs digging. And the hydraulic excavator is a heavy machine to handle, which requires a qualified operator. The bucket hits are important, and the waste is then buried deep. They rot there in the space of a few weeks, which creates a subsidence of the layer of earth and an inhomogeneity, the granulometry of the soil no longer being controlled. This is a known phenomenon, which involves waiting for a certain period of time, and it is only after this period of time that the ground is leveled with a rake or using a blade. grader. This way of doing things generates delays, which is penalizing. Subsequently, a pass is made with the soil preparation machine, namely the stone buryer.

Alternatively, as presented in , it is possible to carry out stripping. This stripping is used to remove the plants, their root system and the various waste present on the surface of the earth, before the subsequent working of the latter by the soil preparation machine mentioned above, namely the buryer. The plants and waste are evacuated by the bucket of the bucket shovel, before the intervention of the buryer.

This stripping by scoop creates shapes in the ground stripped by the blows of the scoop of the semi-circular type, which results in a geometric inhomogeneity of the ground, due to the semi-circular shapes.

Secondly, a soil preparation machine of the burier type, represented in and as mentioned in the introduction, is passed over the ground, at a speed which may be of the order of 1.5 km/h.

This way of working with two machines, namely a hydraulic shovel and a digger, generates delays since it is necessary to use two consecutive tools, each of which must be reserved, and being specific to driving and handling, in particular the shovel.

Alternatively, in some situations it is decided not to do any stripping, in which case the grass and the root system are buried in the ground when the buryer passes, but here too you then have to wait several weeks and then perform leveling.

In other situations, weedkillers are used to simplify stripping, but there are obviously often reasons to avoid such use, and mechanical stripping is preferred.

The present invention aims to solve these problems by providing a single machine system which would carry out the two functions of stripping and burying stones, saving time. The invention also aims to propose an associated method.

Presentation of the invention

The objective of the invention is thus to propose a simpler method of complete soil preparation, including stripping and burying of stones, preferably with a single machine to drive.

To this end, it is proposed, firstly, and according to first of all known principles, a soil preparation method comprising a step of stripping the soil, then a subsequent step of burying stones using a horizontal rotor rotated by a motor and fitted with transverse blades on the periphery of the rotor configured to pierce the ground and lift the earth and stones, and a grid returning the stones to the ground and on the contrary allowing the earth to pass , so as to bury the stones and form a layer of soil without stones on the surface of the prepared soil as the rotor advances over the soil to be prepared.

But in a remarkable and original way, the stripping step is carried out using an added set of longitudinal blades placed temporarily around the rotor, the longitudinal blades being driven in rotation by the motor via the rotor. , holding the transverse blades away from the ground, and being withdrawn before the step of burying stones.

Thus, the rotor used for burying the stones is used to carry out the preliminary stripping. For this, longitudinal slats are temporarily installed which keep the transverse slats at a distance from the ground. Thus, there is no need to use another motorized tool such as a hydraulic shovel to carry out the stripping. And we obtain a soil whose homogeneity is controlled, because the earth has previously been stripped before the burial is carried out. It is not necessary to use a weed killer. The ground can then receive a new lawn.

Preferably, between the stripping stage and the burial stage, a raking stage is carried out to remove the waste resulting from the stripping.

All these steps: stripping, raking, burying, can be carried out with a single multi-tool carrier, easy to handle and not requiring very specific skills. This results in saving time and money.

It is also proposed, alongside the method presented above, a soil preparation system comprising a machine equipped with a horizontal rotor provided with transverse blades on the periphery of the rotor to pierce the soil and lift the earth and stones, the machine further comprising around the rotor and the transverse blades, as already mentioned, a grid returning the stones to the ground and on the contrary letting the earth pass, so as to bury the stones and form a layer of earth without stone on the surface prepared soil. The rotor can be rotated by hydraulic power.

Said soil preparation system further comprises, according to the principles mentioned, a removable set of longitudinal blades which, when placed around the rotor, is such that the longitudinal blades are driven in rotation by the hydraulic supply and via the rotor, keep the transverse blades away from the ground, and attack the soil, which produces the desired stripping.

Various additional features may be provided, singly or in combination:

- The longitudinal blades placed around the rotor can be four in number. It is an easy and balanced implementation. Other solutions are possible, however.

- the removable assembly can be made up of two halves (two sub-assemblies) which are fitted by clamping one vis-à-vis the other around the rotor. The installation is then facilitated. It is possible that each half carries two longitudinal blades.

- the longitudinal blades can be fixed to the rotor between discs carrying successive transverse blades. Fixing is thus ensured in a natural way: the space available between the discs carrying the transverse blades is used to fix the removable assembly. There is no need to dismantle the pre-existing elements to put the new blades in place. A single machine can serve several functions.

- the machine can include a hitching head to be moved by a motorized traction device. Thus, we have the choice of the traction device, and the digger, conventionally, is a device towed by a multi-tool carrier, which is a light device that is easy to handle.

- the machine may include a hydraulic power supply to ensure the rotation of the horizontal rotor. It is an efficient power supply solution. The power supply to operate the transverse blades, or anti-base blades, is reused in an original way to rotate the horizontal blades, around the same rotor.

The invention will be better understood, and other aims, characteristics, details and advantages thereof will appear more clearly in the explanatory description which will follow made with reference to the appended drawings given solely by way of example illustrating an embodiment. of the invention and wherein:

- the is a schematic view of a soil digging process using a bucket shovel;

- the is a schematic view of a soil stripping process using a bucket shovel;

- The is a cross-sectional side view of a stone buryer according to the prior art;

- The shows a ¾ view of a stone buryer equipped according to the invention for preliminary stripping, constituting a system according to the invention;

- The shows a side view, in section of the burying machine equipped according to the invention for preliminary stripping;

- the represents one aspect of ;

- the shows a front view of the digger equipped according to the invention for preliminary stripping;

- Figures 7 and 8 are schematic views, according to the principle of representation of Figures 1a and 1b, showing the soil stripping process using the digger equipped according to the invention;

- The presents a diagram for implementing the method according to the invention.

The shows a side view of a second embodiment of a stone burying machine with equipment for preliminary stripping.

The shows the placement of the stripping blades according to the invention in the second embodiment of the invention, already presented in .

The shows a front view of the digger equipped according to the second embodiment of the invention for preliminary stripping.

The presents an implementation diagram of the method according to the invention, in the second embodiment.

detailed description

The schematically presents the soil digging process according to the prior art using a PG bucket and has been commented on in the introduction. The PH hydraulic excavator that handles the PG bucket is a heavy machine that only specially trained personnel can operate. The digged ground does not have a flat surface, and the plants that rot in depth lead to a change in the surface over time in the first weeks, which requires leveling.

The , which, in the same way, schematically presents the soil stripping process according to the prior art using a PG bucket was commented on in the introduction. Again, only specially trained personnel can operate the PH excavator. We see that the stripped soil does not have a constant depth, due to the successive bucket strokes, which create rounded profiles.

In , a digger 1 has been shown. This is a device operating by traction by a motor vehicle of the PMO multi-tool carrier type or mini-loader (or compact loader or skid-steer in English), which is a much lighter and easier to handle than the PH hydraulic excavator.

It is specified, for the better understanding, but without this being central in the presentation, that the multi-tool carrier PMO circulates in reverse to carry out the traction of the digger 1.

Burier 1 also works thanks to a hydraulic power supply by a hydraulic motor of the PMO multi-tool carrier.

Thus, the digger 1 is a machine equipped with a box 5, or frame, and a hydraulic power supply path 6, to obtain hydraulic power from an external source, in this case the carrier PMO. It can also be hitched by a headstock 10 to the PMO carrier.

Inside the casing 5, there is a horizontal rotor 20, placed perpendicular to the direction of advance of the machine (symbolized by an arrow), and set in rotation by the hydraulic power supply 6. The casing 5 screens the rotor from the outside of the injector 1 upwards, which in particular constitutes safety for people, and leaves it visible downwards, so that the rotor and the accessories it carries approach the ground and can attack and work it. The rotor rotates rapidly, for example at more than 100 revolutions per minute, and typically 300 revolutions per minute.

Around this rotor 20, fixed thereto, are present so-called "anti-sole" blades 30. These are typically arranged in groups of four blades on the same longitudinal side of the rotor 20, and on this longitudinal side distributed regularly around it. They are fixed to the rotor 20 by means of a disc 25 surrounding the latter on the side in question.

As is visible in , this arrangement is typically reproduced on six longitudinal sides of the rotor, which therefore leads to the presence of six discs 25 and therefore 6 times 4 or 24 anti-base plates 30, without such a figure being limiting - other modes of realization being conceivable.

As can be seen in , each anti-base plate 30 is directed towards the outside of the rotor, but is curved, with an angle forming a V or a square, which defines a direction of attack from the ground. It is configured to attack the ground transversely, by opening it deeply, and going to lift a large volume of material.

These anti-sole blades 30, when they attack the ground due to the rotation of the rotor, penetrate deeply, for example over 14 cm, and raise both the earth and the stones upwards, as appears in . The rotation of the rotor 20, caused by the hydraulic supply in a direction of rotation chosen in accordance with the shape of the blades, causes the earth and the stones to be lifted to the ground at first from the rear of the digger 1 towards the PMO multi-tool carrier, then projected by the anti-sole blades 30 above the rotor 20 towards the rear of the coupling, opposite the PMO multi-tool carrier.

The earth and the stones then encounter a grid 40 of the digger 1, placed parallel to the rotor and fixed to the casing 5, which stops the stones thus projected, while allowing the earth to pass. Thus, the stones are very quickly oriented towards the zone 90 of the ground directly to the right of the rotor 20 and touch the ground, after having made an almost complete turn of the rotor 20. They are thus projected deep into the zone dug by the blades anti-sole 30 a moment before, while the earth seized simultaneously passes through the grid 40 to fall on the ground only further on the path, above the stones projected on the ground a few moments before while the machine was less advanced in its progress on the ground. These stones previously projected on the ground are then buried under the newly brought fine earth.

A horizontal leveling blade 50, consisting of a sheet of structured transverse sheet metal and fixed to the frame or box 5 to gradually level the land that has fallen after the passage of the anti-sole blades, and a roller 60 compacting the ground after the intervention of the leveling blade 50 completes the preparation of the ground by leveling the surface and compacting the earth, the stones remaining buried very deeply under a layer of fine earth.

On these principles, known from the prior art, the invention provides the establishment of a set 200 called "grass scalping" composed, as can be seen in , horizontal blades 210 extending parallel to the rotor 20 at equal distance from the latter and placed regularly around the latter, beyond the radius of action of the anti-base blades. They are, in the particular example presented, four in number, and are thus arranged at 90° to each other around the rotor 20. On the , only two of them are visible, the other two being hidden by the rotor 20 and the anti-base plates 30.

This grass scalping assembly 200 is supplied with the buryer 1, and these two elements constitute a complete soil preparation system, within the meaning of the invention: in fact, the buryer 1 retains its function as a buryer when the set 200 is not put in place, but becomes a stripping machine when the set 200 is put in place, that is to say added to the digger 1. It is also added temporarily, since it is intended to use the machine as a buryer soon after using it for stripping.

As it appears on the sectional view of the , the “grass scalping” assembly 200 is more precisely made up of two identical half-

assemblies

200a and 200b, each comprising two horizontal blades 210.

The shows the structure of the sub-assembly 200a, which is also that of the sub-assembly 200b: each half-assembly comprises, in addition to the two blades 210, three clamping elements 202 shaped in the form of half-shells to be placed in contact with the rotor 20, close for two of them, respectively to each of the ends of the rotor 20, and halfway between them for the third. The blades 210 are held at a distance from the rotor, beyond the radius of action of the anti-base blades, each by three groups of two arms 205 terminating, in pairs, at the level of the rotor 20 by one of the elements of clamping 202.

As it appears in , these clamping elements 202 are placed between two adjacent discs 25, that is to say in a free zone of the surface of the rotor 20. These clamping elements 202 are immobilized by screw-nut systems with a clamping element 202 corresponding to the

other sub-assembly

200a or 200b, placed in opposition radially on the rotor, as is visible in . Arms 205 fit between pairs of adjacent discs.

The sectional view of the makes it possible to visualize the rotation of the horizontal blades 210. The horizontal blades 210 have a leading edge and a curved shape opposite the leading edge, but other geometries are possible, in accordance with the principle of pickling. They are rotated in the same direction of rotation as the anti-sole blades 30, that is to say they attack the grass and the roots as well as the most superficial part of the earth, by the rear of the buryer 1, project this waste upwards in front of them in the direction of advance, and release them by letting them fall, possibly through the grid 40. If this waste is too wide, they are stopped by the grid 40 and fall back to the foot of the rotor. This sorting, possibly carried out by the grid, is not decisive in this mode of operation, because there is no question of burying certain waste.

The soil is only attacked to a depth of 1 to 2 cm, in accordance with the principle of stripping, in order to uproot the plants, including their roots, as well as all surface waste. Several passes are possibly carried out with the digger 1 equipped with the grass scalping assembly 200, to perform a complete stripping of the soil to be treated. The anti-sole blades are held away from the ground, since their radius of action is smaller than that of the horizontal blades 210, and they therefore do not attack the ground. It is the horizontal blades 210 which attack the ground. The pickling produced is continuous, with a smooth bottom shape as shown in . The disadvantage observed when using the prior system using a bucket shovel, shown in , where the bottom of the form was semi-circular due to the successive blows of the shovel.

The waste generated, which is grass, roots and surface soil, is then picked up with a raking tool 500, or sweeper or pusher, which is mounted on the PMO multi-tool carrier, instead of the digger 1. Other solutions are possible, but it is advantageous to use the same multi-tool carrier.

At the end of the stripping step, the horizontal blades 210 are removed by separating the half-

assemblies

200a and 200b from the rotor 20. The buryer 1 is used as such to finalize the preparation of the ground by burying the stones at the using anti-sole blades 30.

Thus, the process used consists of the following steps: a stripping step E1 using the PMO multi-tool carrier equipped with the buryer 1 and the grass scalping assembly 200, then a raking step E2 using the PMO multi-tool carrier equipped with a raking tool, then a burying step E3 using the PMO multi-tool carrier equipped with the buryer 1, without the scalping assembly 200 d 'grass. The use of a heavy hydraulic shovel is avoided and the entire operation can be carried out with the PMO multi-tool carrier, which is easy to maneuver for the landscaper.

The soil obtained has a controlled grain size, and can be turfed without delay.

The lets see how the grass scalping assembly 200, consisting of identical half-

assemblies

200a and 200b and each comprising two blades 310. The blades 310 are parallel to the arm 205, and extend over the end of the flank thereof. They are on square pieces 312 fixed to the end of the arms 205. The rotor rotates in this embodiment in the direction of rotation represented by a curvilinear arrow and which allows the sides of the arms 205 which carry the blades 310 to touch the ground at the front of the device, the arms 205 then rising away from the ground on the rear side of the digger 1, their side provided with the blade 310 moving away first.

In the method of fixing the grass

scalping half assemblies

200a and 200b around the rotor 20 has been shown. half set 200a and half set 200b to each other. Such flange-welded nuts 212 are present on one of the ends of each of the six clamping elements 202. Thus the three clamping elements 202 of the half assembly 200a carry three flange-welded nuts 212 and the three clamping elements 212 of the half assembly 200b also carry three nuts welded to the flange, positioned, once the two subassemblies are placed face to face, opposite the nuts of the other subassembly. The assembly screws for the flange are referenced 213 and are six in number.

The arms 205, four in number per clamping element 202 connect these clamping elements to two angled pieces 312 - one for each blade 310, which each comprise on a small angled part and placed parallel to the arms welded nuts for fixing of the blade 313, positioned in the internal angle of the bracket, so that the blade 310 can be placed against this small part of the bracket, which is parallel to the arms and that it can be screwed to using screws 314 which interact with the welded nuts for fixing the blade 313. The welded nuts for fixing the blade 313 are each placed between two arms. The blade fixing screws, referenced 314, are three in number per blade, ie twelve in total.

Each of the two

sub-assemblies

200a and 200b comprises at each of its longitudinal ends a retaining lug for mounting 214 consisting of an elongated rigid metal element comprising an oblong hole positioned outwards, longitudinally, with respect to the arms 205.

These retaining lugs for mounting 214 are used to put screws 215 in place which are also introduced into holes in disc 25, and immobilized using a retaining nut 216 for mounting.

This has the effect of facilitating the positioning of the two

sub-assemblies

200a and 200b during assembly.

Once the flange cap screws 213 are in place and screwed into the flange weld nuts 212, the grass scalping assembly 200 is ready to be rotated, and as soon as the rotor 20 is rotated , a small angular displacement appears between the rotor itself and the grass scalping assembly 200 until an anti-sole blade 30 touches an arm 205, contact by which it will transmit the torque to it.

It is specified that the square pieces 312 are welded to the ends of the arms 205 and that at the opposite end of the arms 205 are also welded the clamping elements 202, at a rate of

- four arms 205 per clamping element 202, two per main branch of the clamping element, which has the shape of a 90° square, from which protrude at each end a short additional leg which every other time carries a nut welded, or receives a screw head; the corresponding additional lugs of the two sub-assemblies can be affixed, due to their orientation, one against the other for assembly and screwing - which makes it possible to give the 90° square shape its role of half shell;

- And six arms 205, in three groups of two, per angled piece 312.

The makes it possible to see the clamping elements 202 passing between the adjacent discs 25, to also observe the square pieces 312 and the blades 310 which protrude from them in the direction of the outside of the rotor.

These new blades perpendicular to those of the first embodiment attack the ground with the dish. Thus the machine does not plunge into the ground because the blades thus positioned prevent the rotor from burying itself. The base of the grass is pulled up and the earth is smoothed and remains in place. A scratching effect is obtained. Thus, by pulling up the grass, however very effectively, little quantity of soil is created. The goal is to create a minimum volume of waste. All that remains is to rake.

The shows the direction of rotation of the grass scalping assembly 200 according to the second embodiment: the arms go down towards the ground on the most front side of the machine and go up towards the ground at the rear of the machine ( rear and front being defined by the direction of travel).

Nevertheless, the direction of rotation can be chosen interchangeably for the two embodiments, without this calling into question the principles of the invention. The mode of rotation of the prevents clogging of the hydraulic carrier.

Thus, the invention relates to a soil preparation method comprising a step E1 of stripping the soil, then a subsequent step of burying stones E3, the burying being carried out using a stone buryer comprising a horizontal rotor 20 placed perpendicular to the direction of advance of the digger, rotated by a motor and provided with transverse blades 30 at the periphery of the rotor configured to pierce the ground and lift the earth and stones, the digger comprising plus a grid 40 returning the stones to the ground and on the contrary letting the earth pass, so as to bury the stones and form a layer of earth without stones on the surface of the ground prepared as the rotor advances 20 on the floor to be prepared.

The stripping step E1 is carried out using a removable assembly 200 of longitudinal blades 210 placed around the same horizontal rotor 20, the longitudinal blades 210 being driven in rotation by the motor via said horizontal rotor 20, holding the transverse blades 30 at a distance from the ground, and being removed before the step of burying stones E3, the stripping step E1 being carried out using a PMO carrier equipped with the buryer 1 equipped of the removable assembly 200 of longitudinal blades, and the burying step E3 then being carried out using said carrier PMO equipped with the buryer 1, without the removable assembly 200 of longitudinal blades.

The longitudinal blades 210 of the removable assembly being four in number, the removable assembly consists of two

halves

200a, 200b which are put in place by clamping one vis-à-vis the other around the single rotor 20,

Between the stripping stage E1 and the burial stage E3, a raking stage E2 is carried out to discard the waste resulting from the stripping.

A soil preparation system has also been presented comprising a machine 1 equipped with a horizontal rotor 20 provided with transverse blades 30 at the periphery of the rotor to pierce the soil and lift the earth and stones, the machine further comprising around the rotor 20 and transverse blades 30 a grid 40 returning the stones to the ground and on the contrary letting the earth pass, so as to bury the stones and form a layer of earth without stones on the surface of the prepared soil.

The soil preparation system further comprises a removable assembly 200 of longitudinal blades 210, the longitudinal blades 210 placed around the rotor being four in number, the removable assembly consisting of two

halves

200a, 200b which are placed in placed by clamping one vis-à-vis the other around the rotor 20, which when it is placed around the rotor 20, is such that the longitudinal blades 210 are driven in rotation by the rotor 20, hold to distance from the ground the transverse blades 30, and attack the ground to strip it.

Claims

. Method for preparing the soil comprising a step of stripping (E1) the soil, then a subsequent step of burying stones (E3), the burying being carried out using a stone buryer comprising a horizontal rotor (20 ) placed perpendicular to the direction of advance of the digger, rotated by a motor and provided with transverse blades (30) at the periphery of the rotor configured to pierce the ground and lift the earth and stones, the digger comprising plus a grid (40) returning the stones to the ground and on the contrary letting the earth pass, so as to bury the stones and form a layer of earth without stones on the surface of the ground prepared as the progress progresses of the rotor (20) on the ground to be prepared, characterized in that the stripping step (E1) is carried out using a removable set (200) of longitudinal blades (210) placed around the same rotor horizontal (20), the longitudinal blades (210) being driven in ro tation by the motor via said horizontal rotor (20), holding the transverse blades (30) at a distance from the ground, and being withdrawn before the stone burying step (E3), the stripping step ( E1) being carried out with the aid of a carrier (PMO) fitted with the digger (1) fitted with the removable assembly (200) of longitudinal blades, and the burying step (E3) then being carried out at using said carrier (PMO) equipped with the digger (1), without the removable set (200) of longitudinal blades.
. Method of preparing the ground according to claim 1, characterized in that the longitudinal blades (210) of the removable assembly being four in number, the removable assembly consists of two halves (200a, 200b) which are placed by clamping one vis-à-vis the other around the single rotor (20),
. Method of preparing the ground according to claim 1 or claim 2, characterized in that between the stripping step (E1) and the burying step (E3), a raking step (E2) is carried out to remove waste from pickling.
. Soil preparation system comprising a machine (1) equipped with a horizontal rotor (20) provided with transverse blades (30) at the periphery of the rotor to pierce the soil and lift the earth and stones, the machine further comprising around the rotor (20) and transverse blades (30) a grid (40) returning the stones to the ground and on the contrary allowing the earth to pass through, so as to bury the stones and form a layer of earth without stones on the surface of the ground prepared, characterized in that the soil preparation system further comprises a removable assembly (200) of longitudinal blades (210), the longitudinal blades (210) placed around the rotor being four in number, the removable assembly being made up of two halves (200a, 200b) which are clamped together around the rotor (20), which when clamped around the rotor (20), is such that the longitudinal blades (210) are driven in rotation by the rotor (20), tie nnent away from the ground the transverse blades (30), and attack the ground to strip it.
. Soil preparation system according to Claim 4, characterized in that the longitudinal blades (210) placed around the rotor are four in number.
. Soil tillage system according to Claim 4 or Claim 5, characterized in that the removable system consists of two halves (200a, 200b) which are clamped in place opposite each other around the rotor (20).
. Soil preparation system according to one of Claims 4 to 6, characterized in that the longitudinal blades are fixed to the rotor between discs (25) carrying successive transverse blades.
. Soil preparation system according to one of Claims 4 to 7, characterized in that the machine comprises a coupling head (10) to be moved by a motorized traction device.
. Soil preparation system according to one of Claims 4 to 8, characterized in that the machine comprises a hydraulic power supply (6) to ensure the rotation of the horizontal rotor (20).