Seed metering device

Abstract

The seed metering device comprises a seed metering box, a horizontally arranged transmission shaft is mounted on the seed metering box, a plurality of seed metering discs are mounted on the transmission shaft side by side, and each seed metering disc can synchronously rotate along with the transmission shaft. The seed metering device has the positive effects that the plurality of seed metering discs which are arranged side by side are arranged on the transmission shaft of the seed metering box, the seed metering push blocks which are arranged circumferentially are arranged on the periphery of each seed metering disc, and the width of each seed metering push block is smaller than that of each seed metering disc; a relatively closed space cannot be formed between the seed-metering push blocks and the seed-metering tongues, a certain distance exists between the seed-metering push blocks on the adjacent seed-metering discs, and when the seed-metering push blocks rotate to uniformly push out seeds on the seed-metering tongues, the seeds can be prevented from being extruded and damaged by the closed space, the activity and the germination rate of the seeds are ensured, and uniform seed metering is realized; therefore, high-quality seeding operation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of sowing devices, in particular to a seeding device. Background Art

[0002] The seed drill is a common agricultural sowing equipment at present. Its core mechanism is the seeding device. When sowing, the seeding wheel is generally driven by the walking wheel to rotate. The seeds are discharged into the seed delivery tube from the seeding box at the bottom of the seed box according to the set sowing amount, and fall into the opened seed furrow through the furrow opener. Then the seeds are covered and compacted by the soil covering and pressing device to achieve uniform and continuous discharge of seeds from the seed box. The seeding wheel structure in the existing seeding device is mostly similar to a gear with a certain thickness. The seeds are pushed out by rotating the peripheral gear teeth. The gear teeth on adjacent seeding wheels are closely arranged with each other. In the process of rotating sowing, the adjacent gear teeth will form a relatively closed space with the sowing box, so that the seeds are squeezed against each other, which makes it easy for the seeding wheel to rub and crush the seeds, which damages the seeds and affects germination; at the same time, seed pulses are easily formed before and after sowing in each closed space, resulting in lumpy seedlings, making it impossible to achieve high-quality sowing operations, and affecting the further increase of wheat yields. Utility Model Content

[0003] The utility model aims to provide a seeding device, in which a seeding push block with a narrower width is arranged on the outer periphery of a seeding disk, so that a relatively closed space will not be formed during the rotating sowing process, thereby reducing the crushing damage to seeds and solving the problems of broken seeds and lumpy seedlings in the prior art.

[0004] The utility model adopts the following technical scheme to solve the technical problems: a seeding device comprises a seeding box, a horizontally arranged transmission shaft is installed on the seeding box, a plurality of seeding disks arranged side by side are installed on the transmission shaft, each seeding disk can rotate synchronously with the transmission shaft, a circumferentially arranged seeding pushing block is provided on the outer circumference of the seeding disk, the width of the seeding pushing block is smaller than the width of the seeding disk, each seeding pushing block comprises a vertical side surface, a top plane and an inclined side surface, wherein the extension line of the vertical side surface passes through the center of the circle of the seeding disk, a drop opening is provided on the seeding box on the upper side of the seeding disk, a first plug plate that can be pulled out is installed in the drop opening, a rotatable seeding tongue is installed in the seeding box on the lower side of the seeding disk, the seeding tongue always has a tendency to rotate close to the seeding pushing block at the bottom of the seeding disk, pushing and pulling the first plug plate can change the size of the drop opening, and the rotation of the transmission shaft can drive the seeding disk and the seeding pushing block thereon to push out the seeds on the seeding tongue. A small seed sowing spike wheel is installed on the transmission shaft, and a circumferentially arranged seeding protrusion is provided on the outer circumference of the small seed sowing spike wheel. The small seed sowing spike wheel can rotate synchronously with the seeding disk, and a second plug plate that can be pulled out is installed in the blanking port, and the second plug plate is located on the upper side of the small seed sowing spike wheel. A first partition is arranged on the blanking port between the first plug plate and the second plug plate, and a second partition corresponding to the first partition is provided on the seeding tongue. The small seed sowing spike wheel and the seeding disk are arranged on both sides of the first partition and the second partition. A seed cleaning disk is installed on the side of the small seed sowing spike wheel, and the seed cleaning disk is fixedly installed on the seeding box. A through hole for the transmission shaft to be inserted is opened at the center of the seed cleaning disk, and a positioning protrusion is provided on the side of the seed cleaning disk close to the seeding box, and a seed cleaning block is provided on the side of the seed cleaning disk close to the seeding protrusion. When the small seed sowing spike wheel rotates relative to the seed cleaning disk, the seed cleaning block can squeeze out the small seeds mixed between the seeding protrusions. The thickness of the small seed sowing spike wheel is 6mm, the thickness of the seed cleaning disk is 3mm, the gap between the small seed sowing spike wheel and the seeding disk is 3mm, the thickness of the seeding protrusion is 2mm, the height of the seeding protrusion is 3mm, and 20 seeding protrusions are arranged circumferentially on the small seed sowing spike wheel. The seeding tongue is hingedly mounted on the seeding box through a rotating shaft, an adjustment seat is provided on the seeding box at the lower side of the seeding tongue, an adjustment plate corresponding to the adjustment seat is provided at the rear end of the seeding tongue, a tension spring is installed between the adjustment plate and the adjustment seat, the tension spring always has a tendency to rotate the adjustment plate close to the adjustment seat so that the seeding tongue rotates close to the seeding push block at the bottom of the seeding disk, an adjustment screw is installed on the adjustment plate, one end of the stud of the adjustment screw contacts the adjustment seat, and rotating the adjustment screw allows the tension spring to expand and contract and adjust the spacing between the seeding tongue and the seeding disk. The transmission shaft is equipped with three seeding discs arranged side by side, the thickness of the seeding discs at the two sides is 10 mm, the thickness of the seeding disc in the middle is 15 mm, the thickness of the seeding push block on the seeding disc is 3 mm, the height of the seeding push block is 3 mm, and 12 seeding push blocks are arranged circumferentially on the seeding disc. An avoidance groove is provided on the oblique side surface of the seeding push block, the seeding disc is fixedly arranged on the transmission shaft, and the seeding push blocks on each seeding disc are arranged alternately in sequence in the circumferential direction.

[0005] The positive effect of the utility model is that a seeding device described in the utility model is provided with a plurality of seeding disks arranged side by side on the transmission shaft of the seeding box, the outer circumference of each seeding disk is provided with a circumferentially arranged seeding pushing block, and the width of the seeding pushing block is smaller than the width of the seeding disk, and in the process of rotating the seeding disk for sowing, a relatively closed space will not be formed between the seeding pushing block and the seeding tongue, and there is a certain distance between the seeding pushing blocks on adjacent seeding disks. When the seeding pushing block rotates to evenly push the seeds on the seeding tongue, it can avoid squeezing and damaging the seeds in the enclosed space, thereby ensuring the activity and germination rate of the seeds, and achieving uniform seeding, thereby completing high-quality sowing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0007] Figure 2 It is the front view of the utility model;

[0008] Figure 3 yes Figure 2 Left view of

[0009] Figure 4 It is a schematic diagram of the structure with the seed box removed;

[0010] Figure 5 It is a structural schematic diagram of a seeding disc, a small seed sowing spike wheel and a seed cleaning disc arranged on a transmission shaft;

[0011] Figure 6 It is a structural schematic diagram of a seed tray;

[0012] Figure 7 It is a structural schematic diagram of a small seed sowing spike wheel;

[0013] Figure 8 It is a structural diagram of a seed cleaning tray;

[0014] Fig. 9 yes Figure 2 An enlarged view of the AA section view;

[0015] Fig.10 It is a schematic diagram of the structure in which the seeding tongue is installed on the seeding box through a tension spring. DETAILED DESCRIPTION

[0016] The utility model discloses a seeding device, such as Figure 1-4 As shown, it includes a seed box 1, on which a horizontally arranged transmission shaft 2 is installed, and on which a plurality of side-by-side arranged seed disks 3 are installed, each of which can rotate synchronously with the transmission shaft 2, and the rotation of the seed disks 3 is used to realize the pushing out of the seeds in the seed box 1.

[0017] In order to minimize the squeezing of seeds when the rotating seed disk 3 pushes the seeds out of the seed box 1, a circumferentially arranged seed pushing block 4 is provided on the outer circumference of the seed disk 3. The width of the seed pushing block 4 is smaller than the width of the seed disk 3, and there is a certain gap between the seed pushing blocks 4 on adjacent seed disks 3.

[0018] like Figure 6 As shown, each seeding push block 4 includes a vertical side surface 5, a top plane 6 and an inclined side surface 7, wherein the extension line of the vertical side surface 5 passes through the center of the circle of the seeding disk 3, and a drop-out opening 10 is opened on the seeding box 1 on the upper side of the seeding disk 3, and a first pull-out plug plate 8 is installed in the drop-out opening 10, and a rotatable seeding tongue 9 is installed in the seeding box 1 on the lower side of the seeding disk 3, and the seeding tongue 9 always has a tendency to rotate close to the seeding push block 4 at the bottom of the seeding disk 3.

[0019] The seeding box 1 on the upper side of the drop opening 10 is used to hold the seeds to be sown. Pushing and pulling the first plug plate 8 can change the size of the drop opening 10, wherein the sowing amount is controlled by the rotation speed of the seeding disc 3, and the size of the drop opening 10 can meet the sowing amount of the seeding disc 3 at the current rotation speed. As the seeding tongue 9 rotates close to the bottom of the seeding disc 3, the falling seeds will accumulate between the seeding tongue 9 and the seeding disc 3, and the friction between the seeds and between the seeds and the seeding tongue 9 is greater than the gravity of the seeds themselves. Therefore, when the seeding disc 3 is in a stationary state, the seeds will fall and accumulate between the seeding tongue 9 and the first plug plate 8, and will not fall from the seeding tongue 9 due to their own weight.

[0020] When sowing is required, the rotation of the transmission shaft 2 can drive the seeding disc 3 and the seeding push block 4 thereon to push out the seeds on the seeding tongue 9. During the rotation of the seeding disc 3, the vertical side surface 5 of the seeding push block 4 will push the seeds on its front side to move together, gradually push the seeds on the seeding tongue 9 away, and finally fall into the seed delivery tube at the bottom of the seeding disc 3. The width of the seeding push block 4 itself is smaller than the width of the seeding disc 3, so that there will be a gap between the adjacent seeding discs 3 and the seeding tongue 9, allowing the seeding push block 4 to enter the gap during the process of pushing the seeds forward, thereby minimizing the extrusion damage to the seeds. The top plane 6 on the seeding push block 4 is set to leave a contact plane between the seeding tongue 9 and the seeding push block 4, and the oblique side surface 7 is set to retain the gap between the seeding tongue 9, which can also reduce the extrusion of the accumulated seeds to a certain extent. The rotation of the above-mentioned multiple seeding discs 3 is equivalent to the seeds being pushed out one by one by the seeding push block 4 on the seeding tongue 9 that accumulates seeds.

[0021] Furthermore, in order to enable the seeding device to sow larger grain seeds such as wheat and small grain seeds such as rapeseed, Figure 5 As shown, a small seed sowing spike wheel 11 is installed on the transmission shaft 2 to realize the rotation discharge of smaller particle seeds. Figure 7As shown, the outer circumference of the small seed sowing spike wheel 11 is provided with circumferentially arranged seeding protrusions 12, the small seed sowing spike wheel 11 can rotate synchronously with the seeding disk 3, and the seeding tongue 9 also has a tendency to rotate close to the small seed sowing spike wheel 11. During the rotation process, the small seed sowing spike wheel 11 can push small-grain seeds from the seeding tongue 9 through the seeding protrusions 12.

[0022] In order to discharge seeds of different sizes from a seeding box 1, a second pull-out plug plate 13 is installed in the drop-out port 10, and the second plug plate 13 is located on the upper side of the small-seed sowing spike wheel 11. A first partition plate 14 is arranged on the drop-out port 10 between the first plug plate 8 and the second plug plate 13, and a second partition plate 15 corresponding to the first partition plate 14 is provided on the seeding tongue 9. The small-seed sowing spike wheel 11 and the seeding disk 3 are arranged on both sides of the first partition plate 14 and the second partition plate 15.

[0023] like Fig. 9 As shown, the first partition 14 and the second partition 15 can be connected to each other to form a partition between the small seed sowing spike wheel 11 and the seeding disk 3, and the setting of the partition will not affect the normal rotation of the transmission shaft 2. According to the sowing needs, the corresponding seeds are placed in the seeding box 1, and the first plug plate 8 or the second plug plate 13 is selected according to the seed size, so that the seeding disk 3 or the small seed sowing spike wheel 11 rotates to realize the seed sowing operation.

[0024] When the small-seed sowing spike wheel 11 rotates to push the small-particle seeds down, the seeds can easily get stuck between adjacent seed-discharging protrusions 12, which will affect the subsequent rotation to move the small-particle seeds. In order to solve the above problem and clean the seeds blocked between the seed-discharging protrusions 12, a seed cleaning disk 16 is installed on the side of the small-seed sowing spike wheel 11. The seed cleaning disk 16 is fixedly installed on the seed box 1, and the small-seed sowing spike wheel 11 can rotate relative to the seed cleaning disk 16.

[0025] like Figure 8 As shown, a through hole is provided at the center of the seed cleaning disc 16 for the transmission shaft 2 to pass through, a positioning protrusion 17 is provided on the side of the seed cleaning disc 16 close to the seeding box 1 to achieve the positioning and installation of the seed cleaning disc 16 on the seeding box 1, and a seed cleaning block 18 is provided on the side of the seed cleaning disc 16 close to the seeding protrusion 12. When the small-seed sowing spike wheel 11 rotates relative to the seed cleaning disc 16, the seed cleaning block 18 can squeeze out the small seeds mixed between the seeding protrusions 12.

[0026] There is a very small gap between the end face of the seed cleaning block 18 and the end face of the seed discharging protrusion 12. As long as small-particle seeds are stuck between the seed discharging protrusions 12, when the seed discharging protrusions 12 at this position rotate to the position of the seed cleaning block 18 with the seeds, the seed cleaning block 18 will push the clamped seeds away from the gap between the seed discharging protrusions 12, thereby ensuring the subsequent rotation and delivery of the small-particle seeds.

[0027] Furthermore, the thickness of the small seed sowing spike wheel 11 is 6 mm, the thickness of the seed cleaning disk 16 is 3 mm, the gap between the small seed sowing spike wheel 11 and the seed disk 3 is 3 mm, the thickness of the seeding protrusion 12 is 2 mm, the height of the seeding protrusion 12 is 3 mm, and 20 seeding protrusions 12 are arranged on the circumference of the small seed sowing spike wheel 11. The gap between the small seed sowing spike wheel 11 and the seed disk 3 is the spatial position of the first partition 14 and the second partition 15.

[0028] Furthermore, in order to realize the rotation and close contact of the seeding tongue 9 to the seeding disc 3, when the seeding disc 3 is in a stationary state, the accumulated seeds are prevented from falling from the seeding tongue 9. Fig.10 As shown, the seeding tongue 9 is hingedly mounted on the seeding box 1 through a rotating shaft, an adjusting seat 19 is provided on the seeding box 1 at the lower side of the seeding tongue 9, an adjusting plate 20 corresponding to the adjusting seat 19 is provided at the rear end of the seeding tongue 9, a tension spring 21 is installed between the adjusting plate 20 and the adjusting seat 19, and the tension spring 21 always has a tendency for the adjusting plate 20 to rotate close to the adjusting seat 19 and thus for the seeding tongue 9 to rotate close to the seeding push block 4 at the bottom of the seeding disk 3.

[0029] In order to adjust the size of the gap between the seeding tongue 9 and the seeding disk 3 to adapt to the sowing operation of seeds of different sizes and types, an adjusting screw 22 is installed on the adjusting plate 20, wherein the adjusting plate 20 is provided with a threaded hole matched with the adjusting screw 22, and one end of the stud of the adjusting screw 22 contacts the adjusting seat 19, and rotating the adjusting screw 22 allows the tension spring 21 to expand and contract and adjust the spacing between the seeding tongue 9 and the seeding disk 3. The adjusting seat 19 is fixedly arranged relative to the seeding box 1, and when the adjusting screw 22 is rotated to move rightward, the distance between the adjusting seat 19 and the adjusting plate 20 is increased, and the seeding tongue 9 rotates clockwise around the axis to move away from the seeding disk 3, and when the adjusting screw 22 is rotated to move leftward, under the elastic force of the tension spring 21, the distance between the adjusting seat 19 and the adjusting plate 20 is reduced, and the seeding tongue 9 rotates counterclockwise around the axis to be close to the seeding disk 3.

[0030] Furthermore, three seeding discs 3 arranged side by side are installed on the transmission shaft 2, the thickness of the seeding discs 3 at the two side positions is 10 mm, the thickness of the seeding disc 3 at the middle position is 15 mm, the thickness of the seeding push block 4 on the seeding disc 3 is 3 mm, the height of the seeding push block 4 is 3 mm, and 12 seeding push blocks 4 are arranged circumferentially on the seeding disc 3. The seeding push blocks 4 on each seeding disc 3 are located at the center of the thickness, and the thickness of the seeding discs 3 at the two side positions is less than that of the middle seeding disc 3. Such a structural arrangement can make the seeding disc 3 rotate more stably and the seeding more uniform.

[0031] In order to further avoid contact and crushing of seeds during the rotation of the seeding push block 4, an avoidance groove 23 is provided on the inclined side surface 7 of the seeding push block 4. The setting of the avoidance groove 23 can leave a larger gap between the seeding push block 4 and the seeding tongue 9, thereby reducing the squeezing of seeds. In order to allow multiple seeding discs 3 to continuously drop seeds during the process of rotating and pushing out seeds, the seeding discs 3 are fixedly arranged on the transmission shaft 2, and the seeding push blocks 4 on each seeding disc 3 are arranged alternately in the circumferential direction. In this way, multiple seeding discs 3 rotate synchronously, and the seeding push blocks 4 thereon are arranged alternately. No matter what state they are in, there will always be a seeding push block 4 to push the seeds away from the seeding tongue 9, thereby achieving continuous seed dropping.

[0032] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A seeding device, characterized in that: The invention comprises a seeding box (1), a horizontally arranged transmission shaft (2) is mounted on the seeding box (1), a plurality of seeding discs (3) arranged side by side are mounted on the transmission shaft (2), each seeding disc (3) can rotate synchronously with the transmission shaft (2), a circumferentially arranged seeding push block (4) is arranged on the outer circumference of the seeding disc (3), the width of the seeding push block (4) is smaller than the width of the seeding disc (3), each seeding push block (4) comprises a vertical side surface (5), a top plane (6) and an inclined side surface (7), wherein the extension line of the vertical side surface (5) passes through the circumference of the seeding disc (3) A seeding box (1) on the upper side of the seeding disk (3) is provided with a drop opening (10), a first plug plate (8) that can be pulled out is installed in the drop opening (10), a rotatable seeding tongue (9) is installed in the seeding box (1) on the lower side of the seeding disk (3), the seeding tongue (9) always has a tendency to rotate close to the seeding push block (4) at the bottom of the seeding disk (3), pushing and pulling the first plug plate (8) can change the size of the drop opening (10), and the rotation of the transmission shaft (2) can drive the seeding disk (3) and the seeding push block (4) thereon to push out the seeds on the seeding tongue (9).

2. A seeding device according to claim 1, characterized in that: The transmission shaft (2) is provided with a small seed sowing spike wheel (11), the outer circumference of which is provided with circumferentially arranged seeding protrusions (12), the small seed sowing spike wheel (11) can rotate synchronously with the seeding disk (3), a second plug plate (13) that can be pulled out is installed in the drop opening (10), the second plug plate (13) is located on the upper side of the small seed sowing spike wheel (11), a first partition plate (14) is provided on the drop opening (10) between the first plug plate (8) and the second plug plate (13), a second partition plate (15) that corresponds to the first partition plate (14) is provided on the seeding tongue (9), and the small seed sowing spike wheel (11) and the seeding disk (3) are arranged on both sides of the first partition plate (14) and the second partition plate (15).

3. A seeding device according to claim 2, characterized in that: A seed cleaning disc (16) is installed on the side of the small seed sowing spike wheel (11). The seed cleaning disc (16) is fixedly installed on the seeding box (1). A through hole is provided at the center of the seed cleaning disc (16) for allowing the transmission shaft (2) to penetrate. A positioning protrusion (17) is provided on the side of the seed cleaning disc (16) close to the seeding box (1). A seed cleaning block (18) is provided on the side of the seed cleaning disc (16) close to the seeding protrusion (12). When the small seed sowing spike wheel (11) rotates relative to the seed cleaning disc (16), the seed cleaning block (18) can squeeze out small seeds mixed between the seeding protrusions (12).

4. A seeding device according to claim 3, characterized in that: The thickness of the small seed sowing spike wheel (11) is 6 mm, the thickness of the seed cleaning disc (16) is 3 mm, the gap between the small seed sowing spike wheel (11) and the seeding disc (3) is 3 mm, the thickness of the seeding protrusion (12) is 2 mm, the height of the seeding protrusion (12) is 3 mm, and 20 seeding protrusions (12) are arranged on the circumference of the small seed sowing spike wheel (11).

5. A seeding device according to claim 1, characterized in that: The seeding tongue (9) is hingedly mounted on the seeding box (1) via a rotating shaft. An adjustment seat (19) is provided on the seeding box (1) below the seeding tongue (9). An adjustment plate (20) corresponding to the adjustment seat (19) is provided at the rear end of the seeding tongue (9). A tension spring (21) is installed between the adjustment plate (20) and the adjustment seat (19). The tension spring (21) always has a tendency to allow the adjustment plate (20) to rotate close to the adjustment seat (19) so that the seeding tongue (9) rotates close to the seeding push block (4) at the bottom of the seeding disk (3). An adjustment screw (22) is installed on the adjustment plate (20). One end of the stud of the adjustment screw (22) contacts the adjustment seat (19). Rotating the adjustment screw (22) allows the tension spring (21) to expand and contract and adjust the distance between the seeding tongue (9) and the seeding disk (3).

6. A seeding device according to claim 1, characterized in that: The transmission shaft (2) is provided with three seeding discs (3) arranged side by side, the seeding discs (3) at the two side positions are 10 mm thick, the seeding disc (3) at the middle position is 15 mm thick, the seeding push blocks (4) on the seeding discs (3) are 3 mm thick, the seeding push blocks (4) are 3 mm high, and 12 seeding push blocks (4) are arranged circumferentially on the seeding disc (3).

7. A seed metering device according to claim 1, characterized in that: An avoidance groove (23) is provided on the oblique side surface (7) of the seeding push block (4); the seeding disc (3) is fixedly arranged on the transmission shaft (2); and the seeding push blocks (4) on each seeding disc (3) are arranged alternately in sequence in the circumferential direction.

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