Precision seeding mechanism of a seed drill

Abstract

The utility model provides a precision seeding mechanism of a seed drill, which belongs to the technical field of seed drills. It solves the problem of how to improve the single seeding accuracy of the seed drill. In the precision seeding mechanism of the seed drill, the seed drill includes an inner wheel body, a seed wheel and a brush wheel whose outer walls are pressed against each other are connected to the inner wheel body, and the precision seeding mechanism includes an elastic member and a seed scraper plate, the seed scraper plate is located between the seed wheel and the brush wheel and is pressed against the outer wall of the seed wheel, the elastic member is positioned in the inner wheel body, and the elastic member elastically acts on the seed scraper plate to make the surface of the seed scraper plate press against the outer wall of the seed wheel. The precision seeding mechanism of the seed drill can improve the single seeding accuracy of the seed drill.

Description

Technical Field

[0001] The utility model belongs to the technical field of seed drills and relates to a precision seeding mechanism of a seed drill. Background Art

[0002] A seeder is an agricultural machine used in the prior art for sowing on large areas of land. It is favored by growers because of its high sowing efficiency, replacing the manual sowing method used in traditional technology.

[0003] In the prior art, a seeder consists of two parts: a traveling wheel and an armrest frame connected to the traveling wheel. The traveling wheel is a main component assembly, which generally includes a seed box, an inner wheel body connected to the seed box, side covers rotatably connected to both sides of the inner wheel body through a rotating shaft, and a plurality of duckbill assemblies detachably connected to the two side covers around the circumference of the traveling wheel. In addition, a brush wheel and a seed wheel that are closely connected are also rotatably connected in the inner wheel body. When in use, seed material is supplied to the seed wheel through the seed box, specifically, the seed material enters the seed groove opened on the outer peripheral wall of the seed wheel. At the same time, the gear box in the inner wheel body drives the seed wheel to rotate, so that the seed material falls into the duckbill assembly when the seed groove faces downward, and finally the duckbill assembly sows the seed material into the soil.

[0004] Since the shapes of seeds are irregular and their sizes are not exactly the same, during the seed supply process, multiple seeds may enter a seed trough together. Even if there is a brush wheel to scrape the surface of the seed wheel, the brushing effect is very limited because the seeds have been embedded in the seed trough, resulting in the problem that the seeder cannot complete the precise sowing of a single seed. Summary of the invention

[0005] The purpose of the utility model is to solve the above problems in the existing technology and propose a precise sowing mechanism of a seeder. The technical problem to be solved by the utility model is: how to improve the single seed sowing accuracy of the seeder.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a precision seeding mechanism of a seeding machine, the seeding machine includes an inner wheel body, a seed wheel and a brush wheel whose outer walls are in contact with each other are connected to the inner wheel body, and the precision seeding mechanism includes an elastic member and a seed scraper plate, the seed scraper plate is located between the seed wheel and the brush wheel and is in contact with the outer wall of the seed wheel, the elastic member is positioned in the inner wheel body, and the elastic member elastically acts on the seed scraper plate to make the scraper plate surface press against the outer wall of the seed wheel.

[0007] In the precision seeding mechanism of the present seeder, a seed wheel and a brush wheel whose outer walls are in contact with each other are installed in the inner wheel body in a rotating connection manner. When the seed box transports seed material to the seed groove on the outer wall of the seed wheel, a large amount of seed material will accumulate on the seed wheel. As the gear box controls the rotation of the seed wheel, the seed material entering the seed groove will move synchronously with the rotation of the seed wheel. When the outer wall of the seed material contacts the brush wheel, the brush wheel can push most of the seed material upward to avoid a large amount of seed material falling into the same duckbill as it rotates. On this basis, the present application cooperates with the scraper plate through the elastic part installed on the inner wheel body, and the elastic force of the elastic part makes the plate surface of the scraper plate press against the outer wall of the seed wheel. In this state, when the seed wheel rolls, the scraper plate will scrape the notches of various grooves in turn. It is worth mentioning that in order to ensure applicability, the prior art generally manufactures a variety of seed grooves with different specifications. The seed wheel is replaceable by users. Larger seeds will choose seed wheels with larger seed slots, and smaller seeds will choose seeds with smaller seed slots. In other words, the size of the seed slot is barely consistent with the size of a single seed. When there are two or more seeds in the seed slot (after the scraping action of the brush wheel, one seed is bound to be completely embedded in the seed slot), the excess seed will be pushed out of the seed slot due to the obstruction of the scraper plate, thereby cooperating with the original brush wheel to achieve double screening to ensure that the seeder can accurately achieve the purpose of single-seed sowing. The benefits of this setting also include: when there is an abnormality in the embedding posture of the seed, it can be regarded as the seed slightly protruding from the seed slot. While the excess seed is scraped off by the scraper plate, the seed in the seed slot can lift up the scraper plate, thereby preventing the scraper plate from damaging the seed in the seed slot.

[0008] In the precision seeding mechanism of the above-mentioned seed drill, the scraper plate is in the shape of a rectangular plate and is located below the seed wheel and the brush wheel, and one end of the scraper plate is arranged near the contact point between the seed wheel and the brush wheel. Through this arrangement, on the one hand, it can prevent the scraper plate from obstructing the seed material and the brush wheel above, causing poor seed material supply, and on the other hand, it can also make the brush wheel and the end of the scraper plate fully cooperate to screen out and scrape off excess seed material, and the setting position of the scraper plate can also cooperate with the brush wheel to block excess seed material, preventing the seed material from bending the brush bristles due to gravity and leaking out from the gap between the brush wheel and the seed wheel.

[0009] In the precision seeding mechanism of the above-mentioned seed drill, the inner wheel body has a mounting plate, the scraper plate has a protrusion at the center of the plate surface on the side facing away from the seed wheel, one end of the elastic member is positioned on the mounting plate, and the other end is arranged around the protrusion and pressed against the surface of the scraper plate. Through this arrangement, the elastic member can fully exert elastic force on the scraper plate under the premise of being firmly positioned, ensuring that the scraper plate and the outer wall of the seed wheel are always fully fitted.

[0010] In the precision seeding mechanism of the above-mentioned seed drill, the inner wheel body has two oppositely arranged side walls, each of which has two limiting grooves, and the scraper plate has a connecting block on one side of the protruding portion near the circumferential corner, and each connecting block has a limiting column on the outer wall, and each limiting column is correspondingly embedded in each limiting groove. In this way, the two sides of the scraper plate are effectively limited, and the elastic force of the elastic member can effectively prevent the scraper plate from falling off or shifting.

[0011] In the precision seeding mechanism of the above-mentioned seed drill, the seed scraper plate is curved in an arc shape along the width direction, thereby ensuring that the plate surface shape of the seed scraper plate is more compatible with the outer wall shape of the seed wheel.

[0012] In the precision seeding mechanism of the above-mentioned seed drill, the elastic member is a spring, and the thread diameter of the elastic member gradually increases from the end that presses against the seed scraping plate to the end that is positioned on the mounting plate. Through this arrangement, it is ensured that the elastic member is positioned at one end of the mounting plate more stably, and the elastic force of the end of the elastic member that presses against the seed scraping plate is more concentrated.

[0013] Compared with the existing technology, the precision seeding mechanism of this seeder has the following advantages:

[0014] By setting a scraper plate with an elastic part pressed against the outer wall of the seed wheel in the inner wheel body, when the seed wheel rotates, the scraper plate can cooperate with the brush wheel to scrape off excess seed material on the surface of the seed wheel, ensuring that only one seed is embedded in the seed groove, ensuring the subsequent accurate supply of single seed material to the duckbill assembly, and thus ensuring that the seeder can accurately achieve the effect of sowing single seed material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the precision seeding mechanism of the seed drill and a partial enlarged diagram thereof.

[0016] Figure 2 It is a cross-sectional view and a partial enlarged view of the precision seeding mechanism of the seed drill.

[0017] Figure 3 It is a schematic diagram of the structure of the inner wheel body.

[0018] Figure 4 It is a structural schematic diagram of a seed scraper plate.

[0019] Figure 5 It is a structural diagram of the scraper plate from another perspective.

[0020] In the figure, 1, inner wheel body; 11, seed wheel; 12, brush wheel; 13, mounting plate; 14, side wall; 141, limiting groove; 2, elastic member; 3, seed scraping plate; 31, protrusion; 32, connecting block; 321, limiting column. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown, in the precision seeding mechanism of the seed drill, the seed drill includes an inner wheel body 1, side plates rotatably connected to both sides of the inner wheel body 1 through a rotating shaft, and a plurality of duckbill assemblies connected between the two side plates along the circumferential direction of the two side plates. In addition, a seed box connected to the inner wheel body 1 is provided on one side of one of the side plates, and a brush wheel 12 and a seed wheel 11 having a plurality of seed grooves on the outer wall along the circumferential direction are rotatably connected inside the inner wheel body 1. Specifically, the seed wheel 11 and the brush wheel 12 are connected to the output shaft of the gear box in the inner wheel body 1. When in use, the seed box discharges seed material into the inner wheel body 1, so that a large amount of seed material accumulates above the seed wheel 11 and the brush wheel 12. Under the driving action of the gear box, the seed wheel 11 starts to rotate, so that the seed material embedded in the seed groove moves downward with the seed groove and finally falls into the duckbill due to gravity. In this process, the brush wheel 12 abutting against the outer wall of the seed wheel 11 can scrape off excess seed material to prevent multiple seeds from being embedded in the seed groove.

[0023] Combination Figure 2 , Figure 4 as well as Figure 5 The precision seeding mechanism includes an elastic member 2 and a scraping plate 3. The elastic member 2 is specifically a spring. As an alternative, it can also be an elastic metal spring. The scraping plate 3 is specifically rectangular and bent along the width direction so that one side of itself is in an arc shape. The scraping plate 3 is located below the brush wheel 12 and the seed wheel 11. One side of the plate surface is in contact with the outer wall of the seed wheel 11 and one end of itself is in contact with the contact between the brush wheel 12 and the seed wheel 11. Figure 3 The inner wheel body 1 has two oppositely arranged side walls 14, the brush wheel 12 and the seed wheel 11 are located between the two side walls 14, two limiting grooves 141 are provided on the two side walls 14, and the limiting grooves 141 on the two side walls 14 are arranged opposite to each other one by one, and a connecting block 32 is integrally formed on the side surface of the scraper plate 3 facing away from the seed wheel 11 near the corner, and a cylindrical limiting column 321 is integrally formed on the outer wall of each connecting block 32, wherein the limiting columns 321 on two connecting blocks 32 are embedded in the limiting groove 141 provided on one of the side walls 14, and the limiting columns 321 on the other two connecting blocks 32 are embedded in the limiting groove 141 provided on the other side wall 14.

[0024] In the inner wheel body 1, a mounting plate 13 is provided on one of the side walls 14. The mounting plate 13 is perpendicular to the side wall 14 and the plate surface is arranged toward the seed wheel 11. One end of the elastic member 2 is positioned on the mounting plate 13. Specifically, one end of the elastic member 2 can be directly melted and fixed on the mounting plate 13 by a welding machine, or it can be fixed by gluing. A cylindrical protrusion 31 is provided at the plate surface seed box on the side of the scraper plate 3 facing away from the seed wheel 11. The other end of the elastic member 2 is sleeved on the outside of the protrusion 31 and pressed against the outer wall of the scraper plate 3. It is worth mentioning that the thread diameter of the elastic member 2 gradually increases from the end pressed against the scraper plate 3 to the end positioned on the mounting plate 13.

[0025] Working principle: the seed box inputs the seed material into the inner wheel body 1 and accumulates it on the sowing wheel 11, and part of the seed material is directly embedded in the seed groove. Driven by the gear box, the seed wheel 11 drives the seed material in the seed groove to rotate. When passing through the brush wheel 12, the brush wheel 12 scrapes the outer wall of the seed wheel 11, so that the excess seed material is preliminarily brushed off. At the same time, under the elastic action of the elastic part 2, the scraper plate 3 is always pressed against the outer wall of the seed wheel 11. If there are still multiple seeds in the seed groove, as the seed wheel 11 rotates, the scraper plate 3 can slide through the notches of various grooves, so that the excess seed material is restricted outside, ensuring that there is only one seed in each groove.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0027] Although the terms such as inner wheel body 1, seed wheel 11, brush wheel 12, mounting plate 13, side wall 14, limiting groove 141, elastic member 2, seed scraping plate 3, protrusion 31, connecting block 32, limiting column 321 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A precision seeding mechanism of a seeding machine, the seeding machine comprising an inner wheel body (1), wherein a seed wheel (11) and a brush wheel (12) are connected to the inner wheel body (1) and the outer walls of the seeding wheel (11) and the brush wheel (12) are in contact with each other, wherein: The precision seeding mechanism comprises an elastic member (2) and a scraper plate (3); the scraper plate (3) is located between the seed wheel (11) and the brush wheel (12) and is in contact with the outer wall of the seed wheel (11); the elastic member (2) is positioned in the inner wheel body (1), and the elastic member (2) elastically acts on the scraper plate (3) so that the scraper plate (3) is in contact with the outer wall of the seed wheel (11).

2. The precision seeding mechanism of the seed drill according to claim 1, characterized in that: The scraper plate (3) is in the shape of a rectangular plate and is located below the seed wheel (11) and the brush wheel (12), and one end of the scraper plate (3) is arranged close to the contact point between the seed wheel (11) and the brush wheel (12).

3. The precision seeding mechanism of the seed drill according to claim 2, characterized in that: The inner wheel body (1) has a mounting plate (13), the scraper plate (3) has a protrusion (31) at the center of the plate surface on one side facing away from the seed wheel (11), one end of the elastic member (2) is positioned on the mounting plate (13), and the other end is arranged around the protrusion (31) and pressed against the plate surface of the scraper plate (3).

4. The precision seeding mechanism of the seed drill according to claim 3, characterized in that: The inner wheel body (1) has two side walls (14) arranged opposite to each other, and each of the side walls (14) is provided with two limiting grooves (141). The scraper plate (3) has a connecting block (32) on one side of the plate surface of the protruding portion (31) near the circumferential corner, and each connecting block (32) has a limiting column (321) on the outer wall, and each limiting column (321) is correspondingly embedded in each limiting groove (141).

5. The precision seeding mechanism of a seed drill according to claim 2, 3 or 4, characterized in that: The scraper plate (3) is curved in an arc shape along the width direction.

6. The precision seeding mechanism of a seed drill according to claim 3 or 4, characterized in that: The elastic member (2) is a spring, and the thread diameter of the elastic member (2) gradually increases from one end pressed against the seed scraping plate (3) to one end positioned on the mounting plate (13).

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