Improved agricultural product distribution system

Abstract

[Seed distribution device for an agricultural machine, comprising a housing, a seed inlet, a perforated and driven disc for conveying the seeds, and an outlet tube. The seeds are conveyed from a reservoir to the outlet tube by means of an air pressure differential. The air pressure differential is interrupted to allow the seeds to leave the disc and enter the outlet tube. The outlet tube includes a first portion into which the seeds enter via an inlet. This first portion of the outlet tube is located inside the housing and is oriented so that the inlet is adjacent to the disc. The distribution device includes a fairing element in which a first opening is formed, extending along a first fairing plane. The fairing element covers the first portion of the outlet tube. Figure to be published with the abbreviation: Fig. 1]

Description

Title of the invention: Improved agricultural product distribution device

[0001] The present invention relates to the field of agricultural machinery and in particular agricultural seeders.

[0002] The invention relates more specifically to a seed distribution device for an agricultural machine such as a single-seed seeder, the distribution device comprising a housing, a seed inlet arranged in the housing, a perforated and driven disc for transporting the seeds along a circular path, an outlet tube transporting the seeds from the housing to a furrow in an agricultural plot, the seeds being transported from a reserve located in the housing to the outlet tube, using a difference in air pressure on either side of the disc, the difference in air pressure being interrupted in an outlet zone near the outlet tube, so that the seeds leave the disc to reach the outlet tube, the outlet tube comprising a first portion into which the seeds enter via an inlet,this first portion of the output tube being inside the housing and being oriented so that the inlet is adjacent to the disc.

[0003] A distribution device of the type mentioned above is known from document EP 3329758 AL. In the distribution device of this document, a tube is mounted in a pressurized chamber located inside the distribution housing. The inlet of the tube is arranged close to the distribution disc. The upper portion of the tube comprises its inlet. This inlet of the tube is located in an area where the pressure flows are decisive. The mere presence of the tube in the chamber can disturb these pressure flows in a non-negligible manner. The prominence of the tube in the chamber generates turbulence, which does not allow the flows to be managed optimally. During operation, some seeds do not reach or enter the tube at the disc outlet. They accumulate in the chamber and are therefore not deposited in the soil. These seeds remain stuck between the tube and the pressurized chamber and disturb the regularity of the distribution.A deterioration in pressure flows leads to a reduction in the regularity and therefore the quality of sowing.

[0004] The present invention aims to reduce or even eliminate at least one of the aforementioned drawbacks.

[0005] For this purpose, it relates to a seed distribution device, for an agricultural machine such as a single-seed seeder, the distribution device comprising a housing, a seed inlet arranged in the housing, a perforated and driven disc for transporting the seeds along a circular path, a tube outlet conveying the seeds from the housing to a furrow in an agricultural plot, the seeds being conveyed from a reserve located in the housing to the outlet tube using an air pressure difference on either side of the disc, the air pressure difference being interrupted in an outlet zone near the outlet tube, so that the seeds leave the disc to reach the outlet tube, the outlet tube comprising a first portion into which the seeds enter via an inlet, this first portion of the outlet tube being located inside the housing and being oriented so that the inlet is adjacent to the disc, characterized in that the distribution device comprises a fairing element in which is formed a first opening extending along a first fairing plane, and in that the fairing element at least partially covers the first portion of the outlet tube.Thanks to the fairing element at the tube level, the seeds no longer remain stuck in unfavorable places in the housing. They fall back into the seed reserve when they do not enter the tube at the disc outlet.

[0006] The invention also relates to an agricultural machine comprising this distribution device.

[0007] The invention will be better understood from the following description, which relates to a preferred embodiment, given by way of non-limiting example, and explained with reference to the appended schematic drawings, in which:

[0008] [Fig. 1] is a perspective view of a dispensing device according to the preferred embodiment of the invention,

[0009] [Fig.2] is a perspective view from another orientation of the dispensing device of [Fig.l].

[0010] [Fig.3] is a front view of the dispensing device of [Fig.l] where certain components are hidden.

[0011] [Fig.4] is a detailed view of the distribution device of [Fig.l] where certain components are hidden.

[0012] [Fig.5A] is a detail view according to another orientation of the distribution device of [Fig.l] where certain components are hidden.

[0013] [Fig.5B] is a detail view according to another orientation of the dispensing device of [Fig.l] according to another embodiment.

[0014] [Fig.5C] is a detail view according to another orientation of the dispensing device of [Fig.l] according to another embodiment.

[0015] [Fig.6] is a detailed view of the distribution device of [Fig.l] where certain components are hidden.

[0016] [Fig.7] is a detailed sectional view of the dispensing device of [Fig.l] where certain components are hidden.

[0017] [Fig.8] is a detailed sectional view according to another orientation of the dis- tribute to [Fig.l] where certain components are hidden.

[0018] [Fig.9] is a view of a single outlet tube.

[0019] [Fig. 10] is a sectional view of the outlet tube alone of [Fig.9].

[0020] [Fig. 11 A] and [Fig. 11 B] are two detail views of a component of the dis tribute to the invention.

[0021] [Fig. 12] is an overall view of an agricultural machine, here a single-seed seeder, which may comprise at least one distribution device according to the invention.

[0022] The invention relates to a seed distribution device (1) for an agricultural machine (2) such as a single-seed seeder, the distribution device (1) comprising a housing (3), a seed inlet (4) arranged in the housing (3), a perforated and driven disc (5) for transporting the seeds along a circular path, an outlet tube (7) transporting the seeds from the housing (3) to a furrow of an agricultural plot, the seeds being transported from a reserve (8) located in the housing (3) to the outlet tube (7) using a difference in air pressure on either side of the disc (5), the difference in air pressure being interrupted in an outlet zone (18) near the outlet tube (7), so that the seeds leave the disc (5) to reach the outlet tube (7), the outlet tube (7) comprising a first portion (9) into which the seeds enter via an inlet (10),this first portion (9) of the outlet tube (7) being located inside the housing (3) and being oriented so that the inlet (10) is adjacent to the disc (5), characterized in that the distribution device (1) comprises a fairing element (11) in which is formed a first opening (21) extending along a first fairing plane (23), and in that the fairing element (11) at least partially covers the first portion (9) of the outlet tube (7).

[0023] As shown in Figures 1 and 2, the distribution device (1) comprises the housing (3) to which the outlet tube (7) is connected. The outlet tube (7) makes it possible to transport the seeds dosed by the distribution device (1) to a furrow of an agricultural plot in a controlled and regular manner.

[0024] The seeds to be dosed using the dispensing device (1) are initially stored in a seed hopper (20A), visible in [Fig. 12].

[0025] It is also possible to dose other particulate agricultural products than seeds with the dispensing device (1), for example granular fertilizer.

[0026] The supply of agricultural product to be dosed to the distribution device (1) can be done via a seed hopper (20A) located near the distribution device (1), or via a fertilizer hopper (20B) remote from the distribution device (1). These two hoppers (20A; 20B) are visible in [Fig. 12]. In a variant not shown, the seed hopper (20A) is remote from the distribution device (1). Similarly, in a variant not shown, the fertilizer hopper (20B) is located proximity to the distribution device (1).

[0027] [Fig. 3] shows the housing (3) of the distribution device (1) without its cover, and revealing the disc (5). The disc (5) is mounted and rotated inside the housing (3) around an axis of rotation (6) and allows the seeds to be transported along a circular path, using perforations forming a circle concentric with the disc (5). The perforations extend around the periphery of the disc (5). Thus, each seed is selected by the disc (5) at the reserve (8) and is transported towards the outlet tube (7) thanks to a pressure difference between the two faces of the disc (5).

[0028] The housing (3) is formed of two removable parts, a housing base and a cover. The cover is fixed to the housing base by rotation, for example by one eighth of a turn, in notches. The rotation for fixing the cover is done around an axis (not shown) parallel or coincident with the axis of rotation (6) of the disc (5). Other lockable and removable fixing solutions are also possible, such as quarter-turn screws, or latch-type fixing elements. Access to the elements present inside the housing, for example the disc (5) is possible thanks to the removable cover.

[0029] [Fig. 4] is a detailed view of the interior of the distribution device (1). The disc (5) has been removed to allow the inlet (4) of seeds to be seen in the housing (3). It ensures the transfer of the seeds from the seed hopper (20A) to the reserve (8) located at the bottom of the housing (3). During operation of the distribution device (1), the seeds are transported from the reserve (8) along a circular path formed by the rotation of the disc (5). A pressure difference (positive or negative) on either side of the disc (5) allows the seeds to lodge on the perforations provided on the disc (5) and to be transported to the inlet (10) of the outlet tube (7). The pressure difference can be generated by an air source such as a hydraulically driven turbine mounted on the agricultural machine (2). This air source is then connected to each distribution device (1) via one or more dedicated pipes.

[0030] [Fig. 8] is a sectional view of the distribution device (1). It shows the step of transferring the seeds from the disc (5) to the outlet tube (7). This step takes place in an outlet zone (18) of the distribution device (1). The seeds leave the rotating disc (5) thanks to a means for interrupting the pressure difference (not shown). The interruption means can take the form of a smooth wheel mounted in the housing (3) and pressed against the disc (5). The interruption means makes it possible to interrupt the pressure difference between the two sides of the disc (5) and thus to cause the seeds to fall into the outlet tube (7). Thanks to this interruption means, the seeds always leave the disc (5) at the same place, preferably above the inlet of the outlet tube (7). Other means of interrupting the pressure difference are possible, such as a pad or a spiked wheel pressed against the disc (5).

[0031] Once the seeds leave the disc (5) after the pressure difference has been interrupted, they reach the outlet tube (7) via its inlet (10). A first portion (9) of the outlet tube (7) is located inside the housing (3) and is oriented so that the inlet (10) is adjacent to the disc (5). The advantage of the position of the inlet (10) relative to the disc (5) is that it ensures efficient transfer of the seeds into the inlet (10), after they have left the disc (5). The closer the inlet (10) of the outlet tube (7) is located to the disc (5), the lower the risk of the seeds not re-entering the tube (7) after leaving the disc (5). The proximity of the inlet (10) to the disc (5), in particular the seed ejection point, ensures direct transfer of the seed into the outlet tube (7) and into the furrow, to obtain precise and regular sowing.

[0032] The trajectory and speed of the seeds leaving the disc (5) are crucial to ensure regularity of sowing. The placement of the inlet (10) of the outlet tube (7) allows for better control of this flow of product leaving the disc (5). The seeds leaving the disc are channeled into the outlet tube (7) after passing through the inlet (10). The more the flow of product is controlled, the more regular and precise the sowing will be, ensuring constant spacing of the seeds in the furrow.

[0033] According to an important characteristic of the invention, the distribution device (1) comprises a fairing element (11) in which a first opening (21) is formed extending along a first fairing plane (23), and the fairing element (11) at least partially covers the first portion (9) of the outlet tube (7). Thanks to the fairing element (11) which covers the space around the inlet (10), the seeds are guided directly towards the outlet tube (7) and consequently, the precision of the sowing operation is ensured. On the other hand, if the seed were not to reach the inlet (10) of the outlet tube (7), the seed would directly join the reserve (8) and could be reused without being damaged. In fact, the seeds which fall back into the reserve (8) do not get stuck in a space located around the outlet tube (7), because this space is filled by the fairing element (11).The seeds slide easily and unhindered into the reserve (8), which ensures that they can be used again later by the distribution device (1). The combination of the inlet (10) of the outlet tube (7) close to the disc (5) and the fairing element (11) located around the first portion (9) of the outlet tube (7) improves the regularity of the flow of seeds within the distribution device (1).

[0034] [Fig.5A] is a view similar to [Fig.4], in another orientation. This figure illustrates more particularly the internal part of the distribution device (1) and in particular the fairing element (11). Thanks to this fairing element (11), the pressure and seed flows inside the housing (3) are better controlled. The fairing element (11) allows the seeds to be guided towards the inlet (10) of the outlet tube (7). In certain cases, the fairing element (11) guides the seeds directly towards the reserve (8), if the seeds do not reach the inlet (10). With the fairing element (11), the seeds do not get stuck or damaged, since they are transferred directly to the reserve (8). The risk of seeds that do not reach the inlet (10) being stuck in the housing (3) or damaged is greatly reduced, or even completely eliminated.

[0035] [Fig. 6] illustrates in more detail the fairing element (11) which covers the first portion (9) of the outlet tube (7). The fairing element (11) is for example a profiled envelope which is intended to cover the first portion (9). A first opening (21) is provided in the fairing element (11) and oriented according to the first fairing plane (23). The first opening (21) is at least aligned with the inlet (10) of the tube (7) and allows the passage of seeds into the outlet tube (7), while allowing the fairing element (11) to cover the first portion (9) of the tube (7).

[0036] The curvature and general shapes of the outlet tube (7) are visible in detail in Figures 9 and 10. The angular orientation of the outlet tube (7) is designed so that the seeds entering through the inlet (10) strike the inner wall of the outlet tube (7) as little as possible. Limiting the number of rebounds of the seeds during their passage through the outlet tube (7) allows better control of their spacing and regularity at the moment when they leave the outlet tube (7) to go into the ground. Similarly, control of the trajectory of the seeds crossing the tube also allows better knowledge of their speed during their transport. Therefore, the upper part of the outlet tube (7) is inclined, both so that the inlet (10) is as close as possible to the disc (5) and the outlet zone (18), but also so that the seeds entering the tube undergo the least shocks and / or rebounds during the rest of their journey.Advantageously, the inclination of the upper part of the tube (7) is achieved by means of a curvature relative to the main axis of the tube (7). Preferably, the angle of this curvature is between 5 and 15° relative to the main axis of the tube (7). The outlet tube (7) has a generally cylindrical shape, but other profiles (not shown) are conceivable, for example a triangular shape, in order to guide the seeds with a chute effect. In the same way, different diameters of outlet tubes (7) are possible, in particular depending on the variations in seed sizes depending on the plants and / or varieties to be sown.

[0037] The first portion (9) of the outlet tube (7) is located inside the housing (3). The first portion (9) is an integral part of the outlet tube (7) as shown in Figures 9 and 10. As seen in Figures 5A, 5B, 5C, 6 and 8, the fairing element (11) covers the first portion (9) of the outlet tube (7). This feature has the advantage of not allowing the outlet tube (7) to protrude alone and therefore without the fairing element (11) inside the housing (3). This allows the fairing element (11) to guide the pressure and seed flows inside the housing (3), without a protrusion of the outlet tube (7) forming an obstacle. The pressure flows guided by the fairing element (11) are thus free from turbulence due to the shapes of the fairing element (11), which limits the consumption of pressurized air by the distribution device (1). Seeds that do not fit into the inlet (10) of the outlet tube (7) are guided by the fairing element (11) directly to the reserve (8) without being damaged, which makes them usable again later during the sowing operation.

[0038] According to another variant not shown, the outlet tube (7) may be an integral part of the housing (3) and comprise an insert of a shape similar to the first portion (9) of the outlet tube (7) described above, fitted onto the outlet tube (7).

[0039] According to another advantageous characteristic of the invention visible in [Fig. 6], the fairing element (11) comprises a second opening (22) extending in a second fairing plane (24), the first fairing plane (23) and the second fairing plane (24) being intersecting. Preferably, they are oriented at an angle of between 45° and 170°. This angle partly defines the shape of the fairing element. Advantageously, the second fairing plane (24) is substantially parallel to the disc (5). The presence of the second opening (22) oriented along the second fairing plane (24) has the advantage of reducing wear on the fairing element (11) in the event that it is in contact with the rotating disc (5).Limiting the wear of the fairing element (11) also makes it possible to limit the maintenance required on the distribution device (1), which has the advantage of reducing the number, duration, complexity and cost of maintenance operations on the distribution device (1).

[0040] Another advantage of the fairing element (11) is that it makes it possible to greatly reduce, or even completely eliminate, some of the turbulence in the pressure flows within the distribution device (1). Thanks to the fairing element (11) of the invention, the seeds ejected from the disc are guided towards the tube and do not undergo any disturbances. The pressure flows within the distribution device (1) and more particularly around the fairing element (11) do not include any or very little turbulence, due to the presence of the fairing element (11) around the first portion (9) of the outlet tube (7). This characteristic makes it possible to reduce the air consumption of the distribution device (1) and thus to require a less substantial and therefore less expensive air source (such as a hydraulic turbine).

[0041] According to an advantageous characteristic of the invention visible in Figures 4 and 5A, the fairing element (11) is an integral part of the housing (3) of the distribution device (1). In this case, the fairing element (11) is integrated directly into the shape of the housing (3). This characteristic has in particular industrialization advantages, such as for example limiting the number of components within the distribution device (1) and thus limiting production costs and the number of spare parts to be managed by the manufacturer.

[0042] According to another embodiment variant illustrated in [Fig.5B], the fairing element (11) is a separate part of the housing (3) of the dispensing device (1), the fairing element (11) preferably being removable from the housing (3). Such a variant makes it possible to easily remove and refit the fairing element (11) as part of a maintenance or cleaning operation of the dispensing device (1).

[0043] Furthermore, such a variant also allows the operator to use a fairing element (11) having different shapes and / or characteristics depending on the cases of use of the distribution device (1). Indeed, the different types of agricultural products that can be used have different sizes, profiles and characteristics, and depending on the configuration of the distribution device (1), it may be advantageous to have a fairing element (11) that is more or less wide or narrow, straight or curved, in order to facilitate the flow of seeds around the fairing element (11). It is thus possible to adapt the fairing element (11) to the type of seeds to be distributed, as part of an operation to modify the configuration of the distribution device (1). Usually this operation also involves changing the disc (5) in order to obtain optimal operation of the distribution device (1).

[0044] Figures 9 and 10 highlight another advantageous characteristic of the invention, namely that the inlet (10) is oriented according to at least two intersecting planes (13; 14). These two planes (13; 14) are distinct from each other and make it possible to form an inlet (10) of the outlet tube (7), which accommodates its inclination. These two planes (13; 14) also make it possible to promote the entry of seeds into the outlet tube (7) compared to an inlet (10) which would be inclined according to a single plane. The plane (14), advantageously located higher than the plane (13), makes it possible to effectively channel the seeds which may have an exit trajectory oriented upwards, while the plane (13) allows the inlet (10) to be close to the disc (5). Advantageously, the two planes (13; 14) are oriented at an angle between 120° and 170°, ideally between 150° and 160°. The plane (13) is advantageously substantially horizontal and perpendicular to the disc (5).

[0045] According to another advantageous characteristic of the invention, visible among others in figures 5A, 6 and 8, the fairing element (11) comprises at least one upper face (15) substantially parallel and / or coplanar with one of the planes (13; 14). This charac The characteristic allows the fairing element (11) to best match the shapes of the first portion (9) of the outlet tube (7), and in particular of the inlet (10). Thus, the management of pressure and seed flows within the distribution device (1) is improved, as described previously.

[0046] The upper face (15) of the fairing element (11) makes it possible to guide the seeds towards the inlet (10) of the outlet tube (7). The other faces of the fairing element (11) are oriented to facilitate the flow of seeds which have not entered the outlet tube (7) towards the reserve (8). Since the reserve (8) is located lower than the inlet (10) of the outlet tube (7) within the housing (3), the fairing element (11) comprises at least one face oriented substantially vertically to form a flow ramp for the seeds towards the reserve (8) in the case where they do not enter the inlet (10).

[0047] All or some of the angles between the different faces of the fairing element (11) and with the housing (3) are obtuse in order to facilitate the flow of the seeds towards the inlet (10) or towards the reserve (8), while avoiding forming cavities or recesses where the seeds could otherwise remain stuck.

[0048] All or some of the edges between the different faces of the fairing element (11) may have fillets or chamfers. These fillets or chamfers allow the seeds to pass easily and without impact. The easy passage of the seeds over the surfaces of the fairing element (11) allows their integrity to be preserved and prevents them from being damaged.

[0049] The fairing element (11) may further comprise different faces which make it possible to best match the shapes of the first portion (9) of the outlet tube (7). These faces may be flat, as seen in FIGS. 5A, 5B, 6 and 8, among others.

[0050] According to another variant embodiment not shown, some or all of the faces of the fairing element (11) may be curved in order to form rounded, concave and / or convex surfaces.

[0051] According to another embodiment variant illustrated in [Fig.5C], it is possible for the inlet (10) of the outlet tube (7) to be oriented along a single plane (13). Similarly, according to this variant, the fairing element (11) has an upper face (15) substantially parallel and / or coplanar to the plane (13).

[0052] According to another advantageous characteristic of the invention, visible in particular in Figures 5A, 6, and 8, the fairing element (11) comprises a rounded edge and / or a chamfer (16) adjacent to at least part of the circumference of the inlet (10). This characteristic makes it easier for the seeds to access the inlet (10), while avoiding damaging them. Advantageously, the rounded edge and / or the chamfer (16) is adjacent to the first opening of the fairing element (21), and is opposite the second opening of the fairing element (22). In this way, the rotation of the disc (5) will not wear out the rounded edge and / or the chamfer (16).

[0053] According to another advantageous characteristic of the invention, visible among others in figures 8 to 10, at least a part of the circumference of the inlet (10) of the outlet tube (7) comprises a rounded edge and / or a chamfer (17). This characteristic, alone or combined with that described in the preceding paragraph, also makes it easier for the seeds to enter the inlet (10) without damaging them. Advantageously, the rounded edge and / or the chamfer (17) is opposite the side (12) of the first portion (9) of the outlet tube (7). In this way, the rotation of the disc (5) will not wear out the rounded edge and / or the chamfer (17).

[0054] [Fig.7] shows a perspective view of the distribution device (1), with the housing (3) and the disc (5), but allowing the opposite side of the disc (5) to be seen, i.e. the side where the seeds engage with the perforations of the disc (5). The housing (3) comprises a blade (19) mounted on or forming an integral part of the housing (3). The blade (19) is intended to facilitate the engagement of the seeds on the disc (5), by preventing them from clogging and / or agglomerating on the perforations of the disc (5). The blade (19) here has an arcuate shape gradually approaching the edge of the perforations as the circular path of the seeds progresses and therefore the perforations of the rotating disc (5). Thanks to this particular shape, the blade (19) prevents several seeds from agglomerating on the same perforation and forming a duplicate during sowing.Duplicates should be avoided because they imply that two seeds are in the same position in the furrow at the time of sowing. The blade (19) is located very close to the disc (5) or can be in contact with the disc (5) for maximum efficiency. In addition, the blade (19) is positioned so as to start at the level of the seed reserve (8), that is to say close to the bottom of the housing (3). Advantageously, the blade (19) is positioned so as to start in a lower half of the space occupied by the disc (5). Advantageously, the blade (19) is positioned so as to stop in an upper half of the space occupied by the disc (5). This position and the shape of the blade (19) make it possible to avoid clogging or agglomeration of the seeds together when they are waiting for the rotation of the disc (5) in the reserve (8) and when they will engage on the perforations of the disc (5). .

[0055] Figures 1 1A and 1 1B show views of the blade (19) alone, in two orientations. As illustrated in these figures, the blade (19) may have at least one removable fixing means allowing it to be easily removed and refitted in the housing (3). This removable fixing means may be one or more screws and / or one or more fixing clips, as well as other variants known in the field of mechanical construction. A removable fixing of the blade (19) makes it possible to envisage a range of several replaceable blades (19) depending on the use. of the distribution device (1). Indeed, different types of agricultural products with different characteristics (dimensions, shapes, adhesion, etc.) may require adapted shapes of the blade (19) for optimal efficiency. These adapted shapes are for example a more or less significant radius of curvature of the blade (19), a more or less progressive curvature between its two ends (for example with a radius of curvature which varies between the two ends), the general dimensions of the blade (height, width, thickness, etc.), a number of perforations of the disc (5) affected by the blade (19) on the circular path of the seeds, etc.

[0056] [Fig. 12] shows an agricultural machine (2) capable of accommodating at least one distribution device (1) having the advantageous characteristics described above. In this case, it is a precision seeder, also called a single-seed seeder. In [Fig. 12], it is a seeder with six sowing elements of the single-seed type. Each sowing element is equipped with at least one distribution device (1) arranged between the seed hopper and soil working and / or sowing elements which are in contact with the soil.

[0057] Of course, the invention is not limited to the embodiments described and shown in the attached drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. A seed distribution device (1) for an agricultural machine (2) such as a single-seed seeder, the distribution device (1) comprising a housing (3), a seed inlet (4) arranged in the housing (3), a perforated and driven disc (5) for transporting the seeds along a circular path, an outlet tube (7) transporting the seeds from the housing (3) to a furrow in an agricultural plot, the seeds being transported from a reserve (8) located in the housing (3) to the outlet tube (7) using a difference in air pressure on either side of the disc (5), the difference in air pressure being interrupted in an outlet zone (18) near the outlet tube (7), so that the seeds leave the disc (5) to reach the outlet tube (7), the outlet tube (7) comprising a first portion (9) into which the seeds enter via an inlet (10),this first portion (9) of the outlet tube (7) being located inside the housing (3) and being oriented so that the inlet (10) is adjacent to the disc (5), characterized in that the distribution device (1) comprises a fairing element (11) in which a first opening (21) is formed extending along a first fairing plane (23), and in that the fairing element (11) at least partially covers the first portion (9) of the outlet tube (7).,

2. Dispensing device according to claim 1, characterized in that the fairing element (11) comprises a second opening (22) extending along a second fairing plane (24), the first fairing plane (23) and the second fairing plane (24) being intersecting.

3. Dispensing device according to one of the preceding claims, characterized in that the fairing element (11) is an integral part of the housing (3) of the dispensing device (1).

4. Dispensing device according to claim 1 or 2, characterized in that the fairing element (11) is a separate part of the housing (3) of the dispensing device (1), the fairing element (11) preferably being removable from the housing (3).

5. Dispensing device according to one of the preceding claims, characterized in that the inlet (10) is oriented according to at least two intersecting planes (13; 14).

6. Dispensing device according to one of the preceding claims, characterized in that the fairing element (11) comprises at least one upper face (15) substantially parallel and / or coplanar with one of the planes (13; 14).

7. Dispensing device according to one of the preceding claims, characterized in that the fairing element (11) comprises a rounded edge and / or a chamfer (16) adjacent to at least part of the circumference of the inlet (10).

8. Dispensing device according to one of the preceding claims, characterized in that at least part of the circumference of the inlet (10) of the outlet tube (7) comprises a rounded edge and / or a chamfer (17).

9. Agricultural machine (2) comprising a distribution device (1) according to any one of the preceding claims.

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