FR2661065A1 - Device for levelling out a mark - Google Patents

Abstract

Device for levelling out a mark intended for the passage of a agricultural machine, particularly a sprayer. Such a device according to the invention is characterised in that it includes means for reshaping the mark (2) drawn into the profile to be obtained and acting in the latter prior to the passage of a compacting wheel (5). These means consist of means for reshaping the mark comprising at least two rotary opening discs (6, 7) located substantially parallel to the direction of travel (F1) at a transverse distance from one another which is equal to the width (1) of the mark (2) to be obtained and preceding a scraper blade (10) located substantially perpendicularly to the direction of travel (F1) at a depth (P) corresponding to that of the said mark (2) which is substantially V shaped. Application to agricultural machines.

Description

Device for leveling a track.

The present invention relates to a device for leveling a track intended for the subsequent passage of an agricultural machine, in particular a sprayer.

 It has been observed that the traces formed in the earth by agricultural machines during their successive passages to carry out all known operations such as, planting, leaf stripping, uprooting, spraying etc., tend to form over time. , after a certain period of inactivity. However, these traces serve both as guides for the machines and as delimitation for the cultivation boards, and the bad weather to which the latter are subjected has the harmful effect of causing the soil situated at the edge towards the bottom of the abovementioned traces to gully. This has the consequence, if not to fill in the tracks, but at the very least to deform them, and make them irregular. These irregularities form on the one hand on the lateral flanks of the track causing a braking effect on the wheels of the machine. and, on the other hand, in the bottom of said trace which has the other harmful effect of making the raceway of the machine irregular.

This causes discomfort to the driver who experiences the bumps of the machine. Such bumps are also not good for the proper functioning of the machine, especially when using a sprayer.

Indeed, in this particular case, the machine has spreading ramps of relatively large length, located cantilevered on either side of the machine. It is easy to understand that the balancing of such arms is important because of their role in stabilizing the whole. Thus all bumps or superelevations cause the machine to pitch and result in an oscillation of amplitude proportional to the length of the arms and the force of the movement of the bumps. Such oscillations cause significant stresses on the ramps which undergo mechanical deformations.

In addition and above all, the doses of active ingredients sprayed are unevenly distributed on the ground and this can have serious consequences in particular in the spreading of insecticide which must comply with an appropriate dosage that meets specific antipollution standards. In addition, excessive doses should be used to ensure minimal spraying.

The object of the present invention is to avoid these drawbacks by improving the stability of the machine, which makes it possible to optimize the doses of active materials for a regular distribution over the ground.

To this end, the invention relates to a device for leveling a trace intended for the passage of an agricultural machine, in particular a sprayer, characterized in that it comprises means for reshaping the trace which is inscribed in the profile to obtaining and acting in it prior to the passage of a compacting wheel.

According to a preferred embodiment, the means for reshaping the track comprise at least two rotary opening discs arranged substantially parallel to the direction of travel (F1) at a transverse distance from each other equal to the width (1 ) of the trace to be obtained and preceding a scraper blade disposed substantially perpendicular to the direction of travel (F1) at a depth (P) corresponding to that of said trace substantially U-shaped.

According to another characteristic of the invention, the scraper blade is preceded by at least one means for loosening the soil acting at the bottom of the track.

This has the effect of lightening the work of the scraper blade which will act more easily on loosened soil, but one could also imagine a scraper element provided with teeth, loosening and scraping at the same time the bottom of the trace.

According to an alternative embodiment, the loosening means is a vibrating tooth.

According to another variant, the loosening means is a notched roller rotating in the direction of traction or in the opposite direction.

Advantageously, a device according to the invention comprises a chassis on which are arranged two lines of means such as inserted above, capable of reshaping two traces of simulated tapping.

Other characteristics will emerge from the description which follows, made with reference to the appended drawing in which
Figure 1 is a top view schematically showing a leveling device according to the invention; Figure 2 is a side view along the line II-II of Figure 1, schematically showing the leveling device during work; Figure 3 is a top view along line III-III of Figure 2; and FIG. 4 is a cross-section view on a larger scale along the line IV-IV of FIG. 3.

The leveling device shown diagrammatically in FIG. 1 consists of a frame 1 of generally signed rectangular shape and produced by means of square tubes, for example welded together. Such a chassis 1 is adapted to receive means for reshaping a trace 2 according to the invention, by means of removable fixing means known per se, such as flanges, clamps, etc. which will not be described here.

According to the example chosen, the device is designed to allow the mounting of two lines of means 3 and 4 parallel to each other and arranged on each lateral side of the chassis 1, in the direction of travel F1.

Thus two traces 2 can be reshaped simultaneously.

The removable fixing means make it possible to space the lines of means 3 and 4 at a variable pitch so as to adapt them to the spacing of the traces 2 to be reshaped.

Advantageously, the chassis 1 forms a three-point hitch, floating semi-automatic, driven by a tractor.

The means for reshaping the trace (2) according to the invention are part of the profile to be obtained (FIG. 4), and act in said trace 2 before the passage of a compacting wheel 5 cooperating with said reshaping means in shape.

 These means are constituted for each of the lines 3 or 4 by two rotary opening discs 6,7 arranged parallel to the direction of travel along F1 at a transverse distance from each other equal to the width "1" of the track 2 to obtain. The disks 6, 7 are advantageously constituted by disks for lifting beets which are turned upside down and are disposed on carrying arms, respectively 6a, 7a by means of axes 6a, 6b on which they are rotatably mounted. The supporting arms 6a. 7a are secured to the chassis 1 by means adjustable in height as a function of the depth "p" of the trace to be obtained.

These means can be constituted by any screw, cylinder, rack etc. systems. acting on the carrying arms 6a, 7a or more simply consisting of a housing provided on the frame 1, crossed by a hole la, and in which are capable of engaging said arms 6a, 7a pierced with at least two holes adjustment 6g, 7c through one of which, according to the chosen setting, engages a pin not shown passing through both the hole and the hole 6c or 7c.

The opening discs 6,7 are also offset in the direction of travel F1, so that they do not act simultaneously on two side walls 2a, 2b of the trace, located opposite.

This is primarily to avoid jamming between the disks 6,7.

Each of the discs 6,7 is successively followed by a means of loosening the soil acting on a bottom 2c of the trace 2 delimiting with the sides 2a, 2b the profile of the latter. In the present example chosen, the loosening means consist of two vibrating teeth 8, 9 mounted in the longitudinal axis of line 3 or 4, for example on a stanchion of sugar beet ploughshare (not shown) secured to the chassis 1 and acting by bracing on the bottom 2c of the track 2.

The role of such vibrating teeth 8,9, as already mentioned, is to loosen the bottom 2c. In this way the effort of a scraper blade 10 disposed in line 3 or 4 is reduced.

Indeed, this scraper blade 10 intervenes in the line, successively to the discs 6.7 and the teeth 8.9.

The scraper blade 10 is disposed substantially perpendicular to the longitudinal axis of the line 3 or 4 corresponding to the direction of travel F1 and acts at a depth "P" and along a width "1" corresponding to those of said trace 2 for it give an approximately U-shaped profile (Figure 4).

Finally, line 3 or 4 ends with the compacting wheel 5, the width of which is substantially identical to that of the scraper blade 10 and consequently of the trace 2 to be obtained. Its role is to tamp down the friable earth left behind the passage of said scraper blade 10, thus consolidating said trace 2. For this, the weight of the wheel will be determined accordingly and its periphery will be smooth and flat.

 Figures 2 and 3 clearly show the action on earth of the various constituent elements of the device both on the sides and on the bottom of trace 2.

It should also be noted that the vibrating teeth 8, 9 as well as the scraper blade 10 and the compacting wheel 5 are also provided with adjustable fixing means such as those previously described for the opening discs 6, 7.

The vibrating teeth 8, 9 and / or the scraper blade 10 can be replaced by a notched roller (not shown) which, depending on the nature of the ground, can rotate in the direction of traction or in the opposite direction.

Claims (11)

Claims. 1. Device for leveling a trace (2) intended for the passage of an agricultural machine, in particular a sprayer, characterized in that it comprises means (6,7,8,9,10) for re-shaping the trace (2) forming part of the profile to be obtained and acting therein prior to the passage of a compacting wheel (5). 2. Device according to claim 1, characterized in that the means for reshaping the trace comprise at least two rotary opening discs (6,7) arranged substantially parallel to the direction of travel (F1) at a transverse distance l one of the other equal to the width (l) of the trace (2) to be obtained and preceding a scraper blade (10) disposed substantially perpendicular to the direction of travel (F1) at a depth (P) corresponding to that of said trace (2), substantially U-shaped. 3. Device according to claim 2, characterized in that the scraper blade (10) is preceded by at least one means of loosening (8,9) of the earth acting at the bottom (2c) of the trace 2. 4. Device according to claim 3, characterized in that the loosening means (8,9) is a vibrating tooth. 5. Device according to claim 3, characterized in that the loosening means (8,9) is a notched roller rotating in the direction of traction or in the opposite direction. 6. Device according to one of claims 3,4 or 5, characterized in that the loosening means (8,9) is disposed near the rear of each opening disc (6,7). 7. Device according to one of the preceding claims, characterized in that it comprises a chassis (1) on which are arranged two lines of means (3,4) capable of reshaping two tracks (2) simultaneously.  8. Device according to one of the preceding claims, characterized in that the chassis (1) forms a semi-automatic, floating three-point hitch. 9. Device according to claim 7, characterized in that the two lines of means (3,4) are spaced along a variable path corresponding to that of the traces (2). 10. Device according to one of the preceding claims, characterized in that all the constituent elements of the line of means (3,4) for reshaping the trace (2), are provided with height adjustment means. 11. Device according to one of the preceding claims, characterized in that the rotary opening discs (6,7) are offset in the direction of travel, so that they do not act simultaneously on two side walls (2a , 2b) of the trace (2) located opposite.