Direct seeding device

Abstract

Seeding device (1), that comprises a tine opener (3) comprising a first vertical part (3a) and a second inclined part (3b), the second inclined part (3b) being the one which digs into the ground, wherein the second inclined part (3b) has a wedge shape; a wheel assembly (5, 6) comprising a first wheel (5) configured to act as a lateral barrier so that the soil lifted by the tine (3) does not go laterally out of the furrow area and a second wheel (6) configured to compact and level the soil that reoccupies the furrow space; and a main support arm (2) which, in turn, is linked to a chassis of a seed drill, such that the tine (3) and the wheel assembly (5, 6) are fixed to the main support arm (2).

Description

[0001] DESCRIPTION

[0002] DIRECT SEEDING DEVICE

[0003] Field of the Invention

[0004] The present invention relates to a seeding device having the ability to open a furrow in the cultivation ground, deposit seeds inside the furrow in a row and cover the furrow with the seeds inside, improving the performance in terms of seeding quality and having the ability to work in different types of soil. The seeding device object of the invention is applicable in agriculture.

[0005] Background of the invention

[0006] A direct seeding device is used to seed cereals, legumes or grass crops on farmland which has not been worked after harvesting the previous crop. Its function is to deposit the seeds into the soil at a given depth.

[0007] Seeding devices are usually mounted on seed drill machines that integrate several units of these, along with other elements necessary for sowing operations.

[0008] The objective of sowing is to deposit the seeds evenly distributed, to the desired depth and that the soil which covers them is left with the appropriate compaction to facilitate the germination of the seeds. And this goal must be achieved for different types of seeds and for soil conditions that can be very diverse. It is also important that the condition of the soilafter the sowing operation is suitable for subsequent tasks. For example, it is important that the soil after sowing is almost flat, without excessive irregularities and without stones or soil protruding from its surface.

[0009] Seed drills known in the state of the art have all or some of the following components: hoppers for seeds and / or fertilizers seed metering devices seed feeding tubes to seeding devices furrow cleaner to remove excess debris from the seeding area; disc coulter to cut the residue; furrow opener for fertilizer; furrow opener for the seeds;

[0010] - wheel to settle the seeds;

[0011] - wheel to close the furrow; and harrow to close the furrow.

[0012] A furrow can be opened by a chisel-type or boot-type tine coulter, a single disc coulter angled with respect to the furrow line, or a double discs coulter. Usually the furrow opener is placed immediately before the tubes that drop the seeds and fertilizers.

[0013] The behavior of the furrow openers depends on their geometric characteristics, the speed, the condition and density of the soil, the amount of residue and the pressure made on it by the seed drill.

[0014] The tine type furrow openers generally involve a major soil disturbance around the opened furrow, while the single or double disc type openers have the disadvantage of requiring a high vertical load on them to dig deep enough into the soil to open the furrow.

[0015] Description of the invention

[0016] The Object of the invention is a seeding device comprising: a tine opener comprising a first vertical part and a second inclined part, the second inclined part being the one that digs into the ground, where the second inclined part has a wedge shape, so that the tine opener opens a furrow lifting the earth towards a side; a wheel assembly comprising a first wheel configured to act as a lateral barrier so that the soil lifted by the fence does not go laterally out of the furrow area and a second wheel configured to compact and level the soil on the furrow; and a main support arm which, in turn, is linked to a chassis of a seed drill, such that the tine opener and the wheel assembly are fixed to the main arm.

[0017] In the seeding device, object of the invention, the wheel assembly is fixed to a support arm which, in turn, is fixed to the parallelogram mechanism, such that the first wheel and the second wheel are misaligned with each other, while the second wheel is aligned with the tine opener. In the seeding device, object of the invention, the main support arm belongs to a parallelogram mechanism, which further comprises: a base for anchoring to the chassis, a first link with a pin joint at one end to the base and another pin joint at the other end to the main arm, a second link, located in a position lower than the first one, which is also pin joined at one end to the base and at the other end to the main arm, and a spring between an intermediate point of the first link and an intermediate point of the base.

[0018] In the seeding device, object of the invention, the wheel assembly is fixed to the main support arm by means of a plurality of anchoring points, providing a multi-position system for the wheel assembly with respect to the support arm, thus regulating the depth of the furrow and the depth at which the seed is deposited.

[0019] Brief description of the drawings

[0020] To complement the description to be made hereinafter and in order to help a better understanding of the features of the invention, the present descriptive memory is accompanied by a set of drawings from which the innovations and advantages of the object of the invention will be more easily understood.

[0021] Figure 1 shows a perspective view of the seeding device, object of the invention.

[0022] Figure 2 shows a top view of the seeding device of the invention.

[0023] Figure 3 shows a sectional view of the seeding device through plane A-A in figure 2.

[0024] Figure 4 shows a sectional view of the seeding device through plane B-B in figure 2.

[0025] Figure 5 shows a sectional view of the seeding device through plane C-C in figure 2.

[0026] Figure 6 shows a sectional view of the seeding device through plane D-D in figure 2.

[0027] Figure 7 shows a sectional view of the seeding device through plane E-E in figure 2. The numerical references used in the figures are:

[0028] 1. seeding device,

[0029] 2. support arm,

[0030] 3. tine opener,

[0031] 4. feeding tube,

[0032] 5. first wheel,

[0033] 6. second wheel,

[0034] 7. anchor points,

[0035] 8. base,

[0036] 9. first link,

[0037] 10. second link,

[0038] 11 . spring, and

[0039] 12. wheels support.

[0040] Detailed description of the invention

[0041] The Object of the invention is a seeding device (1) comprising: a tine opener (3), configured to open a furrow in the ground, when moving forward in relation to it, lifting the soil to one side; a set of wheels (5, 6) comprising a first wheel (5) configured to act as a lateral barrier so that the soil raised by the tine opener (3) does not go laterally out of the furrow area (see fig. 6) and a second wheel (6) configured to compact and level the soil that reoccupies the furrow space; and a parallelogram mechanism which, in turn, is anchored to a chassis of a seed drill, such that the tine opener (3) and the wheel assembly (5, 6) are linked to the parallelogram mechanism.

[0042] Each tine opener (3) comprises a first vertical part (3a) and a second inclined part (3b), the second inclined part (3b) being the one that digs into the ground. In addition, the second inclined part (3b) has a wedge shape, with lower transverse thickness at the beginning and greater thickness in the central and posterior sections, mainly in the highest part where it levels with the surface of the cultivation land, considering as anterior and posterior, the direction of advance in the sowing process.

[0043] The goal effect with this shape is that the tine opener (3) opens the furrow progressively, starting with an inclined line of little thickness in the front, where the formation of the furrow begins (see fig. 3), and progressively widening this line, on the upper side (see fig. 4), until the furrow reaches a triangular-shaped opening section, with the widest part at the level of the ground surface.

[0044] In the rear section of the tine there is an opening configured to lead the seeds from the feeding tube (4) and up to deposit them at the bottom of the furrow (see fig. 5).

[0045] The set of wheels (5, 6) is fixed to a support arm (12) which, in turn, is linked to the parallelogram mechanism, such that the first wheel (5) and the second wheel (6) are misaligned with each other, while the second wheel (6) is aligned with the tine opener (3), so that the desired effect of lateral barrier and soil compaction is achieved, considering the alignment in the direction of advance of the seeding device, object of the invention.

[0046] The parallelogram mechanism comprises a main support arm (2), to which the tine opener (3) and the support (12) of the wheels (5, 6) are fixed, a base (8) for anchoring to the chassis, a first link (9) pin joined at one end to the base (8) and at the other end to the main arm (2) and a second link (10), located in a position lower than the first link (9), which is also pin joined at one end to the base (8) and at the other end to the main arm (2). In addition to the above, between the first link (9) and the base (8), the parallelogram mechanism comprises a spring (11) which provides the vertical contact force between the wheels (5, 6) and the ground.

[0047] This parallelogram mechanism allows the vertical motion of the main support arm (2) and of the elements anchored to the main arm (2) itself (tine opener (3) and pair of wheels (5, 6)), to adapt to the irregularities of the terrain, which is followed by the wheels (5, 6) in contact with the surface of it.

[0048] The set of wheels (5, 6) is fixed to the main arm (2) by means of a multi-position system, which comprises a plurality of anchoring points (7) where the position of the support (12) of the wheels (5, 6) can be fixed, so that different vertical dimensions can be adjusted between the tip of the tine opener (3) and the base of the wheels (5, 6), whereby it is possible to modify the seeding depth (13) as desired on each occasion.

[0049] Alternatively, and for the same purpose of regulating the seeding depth, the tine can be fixed to the main arm by means of a multi-position system and then there would be a unique position of the wheel assembly in relation to the main support arm (2).

[0050] Thus, the wheel assembly (5, 6) of the seeding device object of the invention performs two functions: defining the working depth of the tine opener (3) in relation to the upper surface of the ground ("13" in Fig. 6) and covering the furrow by lightly compacting the soil on the seeds after depositing them (fig. 7).

Claims

CLAIMS1- Seeding device (1), characterized in that it comprises: a tine opener (3) comprising a first vertical part (3a) and a second inclined part (3b), the second inclined part (3b) being the one which digs into the ground, wherein the second inclined part (3b) has a wedge shape; a wheel assembly (5, 6) comprising a first wheel (5) configured to act as a lateral barrier so that the soil lifted by the tine (3) does not go laterally out of the furrow area and a second wheel (6) configured to compact and level the soil that reoccupies the furrow space; and a main support arm (2) which, in turn, is linked to a chassis of a seed drill, such that the tine (3) and the wheel assembly (5, 6) are fixed to the main support arm (2).2- Seeding device (1) according to claim 1 , characterized in that the set of wheels (5, 6) is fixed to a support (12) which, in turn, is fixed to the main support arm (2), such that the first wheel (5) and the second wheel (6) are misaligned with each other, while the second wheel (6) is aligned with the tine opener (3).3- Seeding device (1) according to any of claims 1 to 2, characterized in that the main arm (2) belongs to a parallelogram mechanism, which further comprises: a base (8) for anchoring to the chassis, a first link (9) pin joined at one end to the base (8) and at the other end to the main support arm (2), a second link (10), located in a position lower than the first link (9), which is also pin joined at one end to the base (8) and at the other end to the main support arm (2), and a spring (11) between an intermediate point of the first link (9) and an intermediate point of the base (8).4- Seeding device (1) according to any of claims 1 to 3, characterized in that the set of wheels (5, 6) is fixed to the main support arm (2) by means of a plurality of anchor points (7) of the main support arm (2) to which the support (12) of the wheels (5, 6) is fixed providing a vertical multiposition system for the wheels set with respect to the main support arm (2).

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