A kind of air suction type soybean precision seed metering device

Abstract

The present invention belongs to the technical field of agricultural machinery, and discloses an air-suction type soybean precision seeding device. It includes a seed filling shell, an air suction shell and a seeding disk, the seed filling shell and the air suction shell are in the shape of a disk, the seed filling shell and the air suction shell are connected to form an installation cavity, a seeding disk is installed in the installation cavity, a transmission device is arranged in the through hole to drive the seeding disk and the inner circle seed stirring part and the outer circle seed stirring part to rotate, a seed suction hole is opened on the plane edge of the seeding disk, an air chamber is formed in the air suction shell, and the air chamber is also connected to a negative pressure device, a seed inlet is opened on the seed filling shell, and seeds enter the installation cavity along the seed inlet, a seed dropping channel is opened on the side of the seed filling shell, the seed suction hole passes through the seed dropping channel from top to bottom, and the seeds are discharged into the seed guide tube along the seed dropping channel; the problem that the seed suction hole on the seeding disk in the prior art will leak suction, which will cause interruption in the seed discharge process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an air-suction type soybean precision seed metering device. Background Art

[0002] In modern agricultural production, precise and efficient sowing technology has a decisive impact on crop yield and quality. Traditional sowing methods, such as manual sowing and mechanical seeders, played a key role in the early agricultural mechanization, but with the expansion of agricultural scale and the increase in demand for refined planting technology, the limitations of these methods, such as uneven sowing, high seed damage rate and low sowing efficiency, have gradually emerged.

[0003] In order to overcome these problems, air-suction soybean precision seeders were introduced into agricultural production, and soybeans were scattered as seeds on the target ground in order to improve sowing accuracy and reduce seed damage. Although traditional air-suction soybean precision seeders have been improved in these aspects, they still face challenges in seed management and sowing efficiency as well as ease of disassembly and assembly. Among them, the most notable is the problem of uneven seed adsorption. When dealing with seeds of irregular shapes or sizes, it is often difficult to achieve a stable and uniform adsorption effect. Leakage is prone to occur on the seeding disc, resulting in no seeds in the seeding holes on the seeding disc, which in turn causes the seeds to be unable to be discharged in sequence at the same interval time. During the discharge process, the seeds often have inconsistent intervals. In addition, when the existing seeding device is used for continuous and rapid sowing, there will be residues on the seeding disc that block the seeding holes, which reduces the sowing accuracy and increases the difficulty of cleaning. In addition, during the use of the existing seeding device, there are inconveniences in cleaning, maintenance and replacement of parts, and the component structures of the seeding device are not easy to disassemble and assemble. Summary of the invention

[0004] The object of the present invention is to provide an air-suction soybean precision seeding device to solve the problem in the prior art that the seed suction holes on the seeding tray may leak and thus cause interruption in the seed discharge process.

[0005] To achieve this object, the present invention adopts the following technical scheme: the present invention provides an air-suction soybean precision seeding device, including a seed filling shell, an air suction shell and a seeding disk, the seed filling shell and the air suction shell are in the shape of a disk, the seed filling shell and the air suction shell are connected to form an installation cavity, a seeding disk is installed in the installation cavity, a through hole is formed on the air suction shell, a transmission device is penetrated in the through hole and drives the seeding disk to rotate, a seed suction hole is opened on the plane edge of the seeding disk, an air chamber is formed in the air suction shell, the seed suction hole is communicated with the air chamber, the air chamber is also connected to a negative pressure device, and a seed inlet is opened on the seed filling shell. The seeds enter the installation cavity along the seed inlet, a seed drop channel is opened on the side of the seed filling shell, the seed suction hole passes through the seed drop channel from top to bottom, the seed drop channel is connected with the seed guide tube, the seeds are discharged into the seed guide tube along the seed drop channel, and the seeds are discharged to the outside from the seed guide tube, a bracket is installed above the seed drop channel in the air suction shell, a rotating shaft is rotatably installed on the bracket, a seed throwing wheel is fixed on the rotating shaft, a seed throwing end is formed at equal intervals in the circumferential direction of the seed throwing wheel, the seeding disc drives the seed throwing wheel to rotate, the seed throwing end is inserted in the seed suction hole, and the seed throwing end pushes the seeds to fall into the seed drop channel;

[0006] The seed-discharging disc is protruded on one side of the seed filling shell to form an inner ring seed stirring part and an outer ring seed stirring part, the inner ring seed stirring part is formed with triangular teeth in the circumferential direction, the outer ring seed stirring parts are installed with outer ring seed stirring parts at equal intervals in the circumferential direction of the outer ring of the inner ring seed stirring part, gaps are formed between adjacent outer ring seed stirring parts, the tips of the triangular teeth correspond to the gaps one by one, the outer ring seed stirring part is formed with a guide surface in the radial direction, and the plane where the guide surface is located passes through the seed suction hole.

[0007] Preferably, the outer ring seed stirring portion is in a rounded rectangular shape, and the guide surfaces include two groups, the guide surfaces are arranged on two opposite sides of the outer ring seed stirring portion, and the guide surfaces are transitioned through arc surfaces.

[0008] Preferably, a seed guide groove is formed on one side of the seed suction hole close to the center of the seed discharging disk, the seed guide groove is in the shape of an elongated strip, and the bottom surface of the seed guide groove is lower than the plane of the seed discharging disk.

[0009] Preferably, a seed inlet is provided on the seed filling shell, seed filling installation grooves are installed on both sides of the seed inlet, a seed filling tube is inserted in the seed filling installation groove, the seed filling tube is in the shape of a dustpan, mounting guide rails are formed on both sides of the seed filling tube, the mounting guide rails are inserted in the seed filling installation groove, a flange is formed on the top of the mounting guide rail, a mounting hole is provided on the flange, a fixing hole is formed on the top of the seed filling installation groove, bolts are passed through the mounting hole and the fixing hole to fasten the seed filling tube to the seed filling shell, a seed filling baffle is installed on the upper end of the seed filling tube, and the seed filling baffle is higher than the seed filling shell.

[0010] Preferably, a hexagonal hole is formed at the center of the seed disc, and the transmission device includes a transmission shaft, which is hexagonal and inserted into the hexagonal hole. A bearing is installed in the through hole, and the transmission shaft passes through the bearing and is connected to a rotating motor outside the air suction shell.

[0011] Preferably, a blower motor is installed on the bracket, an exhaust hole is formed at the seed dropping end, an air flow duct is formed in the rotating shaft, the blower motor is connected to the exhaust hole through the air flow duct, the exhaust hole discharges air flow outward, and the air flow contacts the seeds.

[0012] Preferably, in the seed filling shell, a seed baffle is formed on one side of the seed drop channel, the seed baffle is provided with a seed guide installation groove, a seed guide rail is formed on the seed guide tube, the seed guide rail is inserted into the seed guide installation groove, a seed guide baffle is formed on the upper end of the seed guide tube close to the seed plate, a pipe sleeve is inserted at the end of the seed guide tube, a screw hole is formed on the pipe sleeve, a connecting screw is rotatably installed in the screw hole, an anti-jump baffle is installed on the connecting screw, and the plane where the anti-jump baffle is located is parallel to the seed movement direction.

[0013] Preferably, a cylindrical shaft is formed at the lower end of the seed baffle, a seed unloading baffle is rotatably mounted on the cylindrical shaft, a notch is formed on the bottom thickness surface of the seed filling shell, the seed unloading baffle is blocked on the notch, a hook is installed at the end of the seed unloading baffle away from the cylindrical shaft, a buckle is installed on the thickness surface of the seed filling shell, and the buckle and the hook are detachably connected.

[0014] Preferably, a seed scraper is detachably installed in the seed filling shell, the seed scraper is serrated, the blade surface of the seed scraper is parallel to the seed plate, and the seed scraper scrapes the seeds in the seed suction hole.

[0015] Preferably, the air chamber is a C-shaped trough body, a groove is formed on the trough body, a sealing ring is installed in the groove, the sealing ring is in contact with the seed disc, the bracket is installed at the notch of the air chamber, an air suction pipe is formed on the air suction shell, the air suction pipe is connected to the negative pressure device, and an air intake fence is also provided on the upper side of the seed filling shell.

[0016] Beneficial effect: after the seeds are sent into the installation cavity, the inner circle seed stirring part and the outer circle seed stirring part can stir the seeds entering the installation cavity through the rotation of the seeding disc, so that all the seeds with different diameters are stirred up, and then the stirred seeds will follow the edge of the triangular teeth of the inner circle seed stirring part to slide radially outward, and after hitting the outer circle seed stirring part, the seeds hit the guide surface and change the moving direction under the action of the guide surface, so that the seeds can move along the guide surface to the outermost side of the seeding disc and then directly fall into the seed suction hole, so that the seeds can be adsorbed in each seed suction hole, reducing the leakage of the seed suction hole, so that the seed suction hole on the seeding disc can smoothly receive the seeds, and when the seeds are transported to the seed dropping channel through the seed throwing wheel, the seeds can be discharged outward along the seed guide tube in sequence at the same interval time, so that the interval time of the seeds in the discharge process is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded view of the air-suction soybean precision seed metering device of the present invention;

[0018] Figure 2 This is a main body diagram of the air-suction soybean precision seed metering device of the present invention;

[0019] Figure 3 This is a main diagram of the seed guide tube of the present invention;

[0020] Figure 4 It is a main body diagram of the transmission device of the present invention;

[0021] Figure 5 This is a main diagram of the seed unloading baffle of the present invention;

[0022] Figure 6 This is a main diagram of the seeding disc of the present invention;

[0023] Figure 7 This is a main diagram of the air-blowing seeding mechanism of the present invention;

[0024] Figure 8 This is a main diagram of the air suction housing of the present invention;

[0025] Fig. 9 This is a seed guide tube installation diagram of the present invention;

[0026] Fig.10 This is a diagram of the outer side of the filling shell of the present invention;

[0027] Fig.11 It is a main body diagram of the seed filling tube of the present invention.

[0028] In the figure: 1. Seed filling tube; 101. Mounting guide rail; 102. Seed filling baffle; 103. Mounting hole; 2. Seed filling shell; 201. Seed dropping channel; 202. Seed baffle; 203. Seed inlet; 204. Cylindrical shaft; 205. Seed guide installation groove; 207. Air intake fence; 208. Seed filling installation groove; 209. Fixing hole; 3. Seed guide tube; 301. Seed guide baffle; 302. Seed guide rail; 303. Pipe sleeve; 304. Anti-jump baffle; 305. Connecting screw; 4. Transmission device; 401. Transmission shaft; 402. Bearing; 5. Seed scraper; 6. , buckle; 7, seed unloading baffle; 701, cylindrical hole; 702, hook; 8, seed plate; 801, inner circle seed stirring part; 802, outer circle seed stirring part; 803, seed suction hole; 804, seed guide groove; 805, guide surface; 9, air blowing seed delivery mechanism; 901, blower motor; 902, seed delivery wheel; 903, rotating shaft; 904, bracket; 905, seed delivery end; 906, exhaust hole; 10, sealing ring; 11, air suction shell; 1101, groove; 1102, through hole; 1103, air intake port; 1104, air chamber; 1105, air intake pipe. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] Under the existing technology, some seeds are heavy and the suction force of the seed suction holes is weak, so the seed suction holes cannot absorb the seeds in the installation cavity, and the seed suction holes on the seed plate will leak suction, resulting in the air-suction soybean precision seeding device being unable to discharge seeds at the same interval time. At the same time, the seeds in the seed suction holes are adsorbed by the negative pressure on the other side of the seed plate, resulting in the phenomenon that the seeds cannot be discharged, which also causes the problem that the seeds cannot be discharged from the seed guide tube in sequence within the specified time.

[0034] In order to solve the above problems, Figures 1 to 11 As shown, the present invention provides an air-suction soybean precision seeding device, the seeds processed by the present invention are soybeans, and the device comprises a seed filling shell 2, an air suction shell 11 and a seeding disk 8, the seed filling shell 2 and the air suction shell 11 are in the shape of a disk, the seed filling shell 2 and the air suction shell 11 are fixedly connected by bolts to form an installation cavity, the seeding disk 8 is installed in the installation cavity, the seeding disk 8 divides the installation cavity into two, one side of which is negative pressure, and the other side can directly receive seeds poured from the outside, a through hole 1102 is formed on the air suction shell 11, and a transmission device 4 is arranged in the through hole 1102 to drive the seeding disk 8 to rotate. Through the rotation of the seed disc 8, the seeds can be brought into the seed drop channel 201 on one side of the seed filling shell 2 through the seed suction holes 803 in sequence. The plane edge of the seed disc 8 is circumferentially provided with equally spaced seed suction holes 803. The seed suction holes 803 of the present invention are provided with 40 groups, which are arranged on a circle with a radius of 105 mm on the seed disc 8. An air chamber 1104 is formed in the air suction shell 11. The seed suction holes 803 are connected to the air chamber 1104, and the air chamber 1104 is also connected to the negative pressure device. In this way, the seeds entering the installation cavity can be adsorbed on the seed suction holes 803 on the seed disc 8 by negative pressure and rotate with the seed disc 8.

[0035] like Fig. 9As shown, a seed inlet 203 is provided on the seed filling shell 2, and the seeds enter the installation cavity along the seed inlet 203. A seed drop channel 201 is provided on the side of the seed filling shell 2, and the seed suction hole 803 passes through the seed drop channel 201 from top to bottom. The seed drop channel 201 is connected with the seed guide tube 3, and the seeds are discharged into the seed guide tube 3 along the seed drop channel 201. The seeds are discharged from the seed guide tube 3 to the outside, and a bracket 904 is installed above the seed drop channel 201 in the air suction shell 11. The bracket 904 is provided on the side of the air suction shell 11. 04 is rotatably mounted with a rotating shaft 903, on which a seeding wheel 902 is fixed, and the seeding wheel 902 is provided with seeding ends 905 at equal intervals in the circumferential direction, and the seeding disc 8 drives the seeding wheel 902 to rotate, and the seeding end 905 is inserted into the seed suction hole 803, and the seeding end 905 will push the seeds to fall into the seed dropping channel 201, so that the seeds are discharged outward along the seed guide tube 3, and the seeding disc 8 continues to rotate and continues to enter the installation cavity to prepare to absorb new seeds, and the cycle is repeated.

[0036] The seed disc 8 is formed with an inner circle seed stirring portion 801 and an outer circle seed stirring portion 802 on one side of the seed filling shell 2. The inner circle seed stirring portion 801 is formed with triangular teeth in the circumferential direction. The outer circle seed stirring portion 802 is installed with equal intervals in the circumferential direction of the outer circle of the inner circle seed stirring portion 801. Gaps are formed between adjacent outer circle seed stirring portions 802. The tips of the triangular teeth correspond to the gaps one by one. The outer circle seed stirring portion 802 is formed with a guide surface 805 in the radial direction. The plane where the guide surface 805 is located passes through the seed suction hole 803.

[0037] By providing the inner circle seed stirring part 801 and the outer circle seed stirring part 802, the seeds entering the installation cavity can be fully stirred regardless of their size, so that the seeds can be moved to the seed suction hole 803 of the seed plate 8 through irregular jumping. The inner circle seed stirring part 801 of the present invention is formed with triangular teeth, and the angle of the tip of the triangular teeth is 40°. The two side planes of the triangular teeth can throw the seeds that fall between the adjacent triangular teeth of the inner circle seed stirring part 801 onto the guide surface 805 of the outer circle seed stirring part 802, and then continue to change the moving direction of the seeds through the guide surface 805, and the seeds will continue to move along the guide surface 805. The extension line passes through the seed suction hole 803, so the seed will slide directly into the seed suction hole 803 along the guide surface 805, so that the seed can fall into each seed suction hole 803, and there is no need for the seed to enter the seed suction hole 803 through free jumping. The movement direction of the seed is controlled by the inner circle seed stirring part 801 and the outer circle seed stirring part 802, and then the seed can be controlled to enter the seed suction hole 803, so that the probability of the seed suction hole 803 absorbing the seed is higher, and the phenomenon of leakage of the seed suction hole 803 is avoided. When the seeds are discharged outward through the seed dropping channel 201, there will be no interruption, so that the interval time of seed discharge is consistent.

[0038] The outer ring seed stirring part 802 is a rounded rectangular shape, and the guide surface 805 includes two groups, and the guide surfaces 805 are arranged on two opposite sides of the outer ring seed stirring part 802, and the guide surfaces 805 are transitioned by arc surfaces. The arc surfaces on the outer ring seed stirring part 802 can avoid cutting the seeds, so that the seeds will not be damaged during the stirring process. In addition, the guide surfaces 805 on both sides of the outer ring seed stirring part 802 can guide the seeds to the seed suction holes 803 corresponding to the guide surfaces 805, so that each seed suction hole 803 will be adsorbed with seeds.

[0039] A seed guide groove 804 is formed on one side of the seed suction hole 803 close to the center of the seed plate 8. The seed guide groove 804 is in the shape of an elongated strip, and the bottom surface of the seed guide groove 804 is lower than the plane of the seed plate 8. After the seeds are thrown out through the guide surface 805, in order to allow the seeds to accurately enter the seed suction hole 803, the seed guide groove 804 is provided so that the seeds can first enter the seed guide groove 804 and slide along the length direction of the seed guide groove 804, and finally be adsorbed in the seed suction hole 803 of the seed guide groove 804, so that each seed suction hole 803 can receive the seeds, thereby avoiding the situation where the interval time of seed discharge is inconsistent due to the absence of seeds in some of the seed suction holes 803 when the seeds are discharged.

[0040] A seed inlet 203 is provided on the seed filling shell 2, and seed filling installation grooves 208 are installed on both sides of the seed inlet 203. A seed filling tube 1 is inserted in the seed filling installation groove 208. The seed filling tube 1 is in the shape of a dustpan, and mounting guide rails 101 are formed on both sides of the seed filling tube 1. The mounting guide rails 101 are inserted in the seed filling installation groove 208, and seeds fall directly into the seed filling tube 1. Through the cooperation between the mounting guide rails 101 and the seed filling installation groove 208, the seed filling tube 1 becomes a quick-disassembly structure, which is convenient for workers to disassemble and repair in the later stage, and is also convenient for assembly. At the same time, a seed filling baffle 102 is installed on the upper end of the seed filling tube 1, and the seed filling baffle 102 is higher than the seed filling shell 2. When pouring seeds from the outside, the seed filling baffle 102 can be set to prevent the seeds from jumping back and forth in the seed filling tube 1 and bursting out to the outside. At the same time, the seeds scattered from the outside can be accurately dropped into the seed filling tube 1 to avoid spilling.

[0041] A flange is formed on the top of the mounting rail 101, and a mounting hole 103 is formed on the flange. A fixing hole 209 is formed on the top of the seed filling mounting groove 208. Bolts are passed through the mounting hole 103 and the fixing hole 209 to fasten the seed filling tube 1 to the seed filling shell 2. The seed filling tube 1 can be fixed to the seed filling shell 2 by bolts, which is convenient for disassembly and installation.

[0042] A hexagonal hole is formed at the center of the seeding disc 8, and the transmission device 4 includes a transmission shaft 401, which is hexagonal and inserted into the hexagonal hole. A bearing 402 is installed in the through hole 1102, and the transmission shaft 401 passes through the bearing 402 and is connected to the rotating motor outside the air suction housing 11. The transmission shaft 401 is limited by the hexagonal hole, driving the seeding disc 8 to rotate continuously in the installation cavity, and transporting seeds to the outside along the seed guide tube 3.

[0043] like Figure 7 As shown, a blower motor 901 is installed on the bracket 904, and six groups of seed dropping ends 905 are formed on the circumference of the rotating shaft 903. The rotating shaft 903 drives the seed dropping ends 905 to rotate, and exhaust holes 906 are formed on the seed dropping ends 905. An airflow duct is formed in the rotating shaft 903. The blower motor 901 is connected to the exhaust holes 906 through the airflow duct, and the exhaust holes 906 discharge airflow outward, and the airflow contacts the seeds. In order to make the seeds fall smoothly above the drop channel, firstly, the seeds are directly pushed by the seed dropping end 905 to move toward the outside of the seed suction hole 803. The above-mentioned airflow can assist in blowing the seeds outward, so that all the seeds can fall at the position of the seed drop channel 201, and the seeds can be discharged outward along the seed guide tube 3 at the same time. At the same time, the above-mentioned airflow can also blow out the debris and other residues in the seed suction hole 803 to avoid the accumulation of debris in the seed suction hole 803, resulting in the diameter of the seed suction hole 803 becoming smaller, the seeds are stuck in the seed suction hole 803 and cannot be discharged, or the negative pressure on the other side cannot absorb the seeds with a larger diameter.

[0044] like Fig. 9 As shown, in the seed filling shell 2, a seed blocking plate 202 is formed on one side of the seed dropping channel 201, and the seed blocking plate 202 is provided with a seed guide installation groove 205, and a seed guide rail 302 is formed on the seed guide tube 3, and the seed guide rail 302 is inserted into the seed guide installation groove 205. The cross-section of the seed guide installation groove 205 is T-shaped and corresponds to the seed guide rail 302, which can not only make the seed guide tube 3 stably inserted on the seed blocking plate 202, but also facilitate the later maintenance and disassembly.

[0045] A seed guide baffle 301 is formed on one side of the seed guide tube 3 close to the seed tray 8. The seed guide baffle 301 can prevent the seeds that have just fallen from the seed tray 8 from falling to the outside of the seed guide tube 3, so that the seeds can be discharged outward along the seed guide tube 3, thereby improving the seeding accuracy.

[0046] A pipe sleeve 303 is inserted into the end of the seed guide tube 3, and a screw hole is formed on the pipe sleeve 303. A connecting screw 305 is rotatably installed in the screw hole, and an anti-jump baffle 304 is installed on the connecting screw 305. The plane where the anti-jump baffle 304 is located is parallel to the moving direction of the seeds. The angle of the anti-jump baffle 304 can rotate with the connecting screw 305. The seeds processed by the present invention are soybean seeds, which have high elasticity and can bounce up when they fall on the ground. The above-mentioned seed guide anti-jump baffle 304 can make the bounced seeds collide with the seed guide anti-jump baffle 304, thereby ensuring that the seeds can accurately fall around the designated area.

[0047] A cylindrical shaft 204 is formed at the lower end of the seed blocking plate 202, and a cylindrical hole 701 is installed on the seed unloading baffle 7. The cylindrical shaft 204 is inserted into the cylindrical hole 701, and the seed unloading baffle 7 is rotatably installed on the cylindrical shaft 204. A notch is formed on the bottom thickness surface of the seed filling shell 2, and the seed unloading baffle 7 is blocked on the notch. A hook 702 is installed on the end of the seed unloading baffle 7 away from the cylindrical shaft 204, and a buckle 6 is installed on the thickness surface of the seed filling shell 2. The buckle 6 and the hook 702 are detachably connected.

[0048] The buckle 6 is installed on the seed filling shell 2 in a movable state, and the hook 702 is hooked with the buckle 6. If the buckle 6 moves away from the hook 702, the seed unloading baffle 7 can be fixed to achieve sealing inside the seed filling shell 2. If the buckle 6 moves close to the hook 702, the hooked state of the two can be separated, and the seed unloading baffle 7 is opened, and the seeds can fall from the gap to take out the remaining seeds in the installation cavity. The specific structural principles of the above-mentioned buckle 6 and hook 702 are existing technologies and are not repeated here.

[0049] The seed unloading baffle 7 of the present invention is rotatably mounted on the cylindrical shaft 204. After the seed filling shell 2 and the air suction shell 11 are separated, the seed unloading baffle 7 can be directly pulled out, which is convenient for disassembly and assembly.

[0050] A scraper 5 is detachably installed in the seed filling shell 2. The scraper 5 is serrated, and the blade surface of the scraper 5 is parallel to the seed plate 8. The seeds in the seed suction hole 803 will first pass through the scraper 5 before entering the seed dropping channel 201. The scraper 5 scrapes off the excess seeds adsorbed in the seed suction hole 803, so that the seeds in each seed suction hole 803 remain in a single grain state, and one seed can be discharged from the ground at the same interval time, thereby improving the accuracy of seeding.

[0051] The air chamber 1104 is a C-shaped groove body with a groove 1101 formed on the groove body. A sealing ring 10 is installed in the groove 1101, and the sealing ring 10 abuts against the seed plate 8. This can make the air tightness of the air chamber 1104 better and the suction force of the seed suction hole 803 stronger, so that the seeds can be adsorbed to avoid interruptions in seed discharge.

[0052] The bracket 904 of the air-blowing seed-feeding mechanism 9 is installed at the notch of the air chamber 1104, and an air suction pipe 1105 is formed on the air suction shell 11. One end of the air suction pipe 1105 is connected to a negative pressure device, which is generally a negative pressure fan. An air suction port 1103 is formed at the other end of the air suction pipe 1105 and is connected to the air chamber 1104. An air intake bar 207 is also provided on the upper side of the seed-filling shell 2. By setting the air intake bar 207, sufficient air can be provided for the side where the seeds are located in the installation cavity to ensure the suction force generated by the adsorption hole, so that the seeds will not fall on the seed suction hole 803.

[0053] The working process of the present invention is as follows:

[0054] During operation, the seed filling shell 2 and the air suction shell 11 are fixed by bolts, a seed scraper 5 is provided on the inner edge of the seed filling shell 2, seeds enter the installation cavity through the seed filling tube 1, the negative pressure fan is connected to the suction pipe 1105, the air chamber 1104, the sealing ring 10, and the seed plate 8 together constitute a negative pressure air cavity, and the negative pressure acts on the seeds on the front surface of the seed plate 8 through the seed suction holes 803, so that the seeds are adsorbed on the seed suction holes 803 under the action of negative pressure.

[0055] The transmission shaft 401 rotates under the drive of the motor, driving the seed plate 8 fixedly connected thereto. During the rotation process, the inner circle seed stirring part 801 and the outer circle seed stirring part 802 evenly distributed on the front surface of the seed plate 8 stir the seed population, and guide the seeds into the seed guide groove 804, and finally adsorbed onto the seed suction hole 803. The seeds adsorbed on the seed suction hole 803 are brought to the top of the seed filling shell 2 as the seed plate 8 rotates, and are cleared individually by the seed scraper 5.

[0056] Then it continues to rotate to reach the seed drop channel 201, and the seed dropping wheel 902 located at the rear of the seed plate 8 rotates with the rotation of the seed suction hole 803, and the seed dropping end 905 pushes out the seeds adsorbed on the mold hole, and the negative pressure of the negative pressure air cavity is blocked. At the same time, the blower motor 901 provides positive air pressure to the seed suction hole 803 to further blow down the seeds. The seeds fall into the seed drop channel 201 under the combined action of gravity, centrifugal force, the ejection force of the seed dropping end 905 and the positive pressure, and enter the seed guide tube 3. The seeds are decelerated and dropped by the arc structure at the end of the seed guide tube 3, and the seeds are pressed by the anti-jump baffle 304 to complete the seeding operation.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An air-suction soybean precision seed metering device, characterized in that: The invention comprises a seed filling shell (2), an air suction shell (11) and a seed discharging disk (8), wherein the seed filling shell (2) and the air suction shell (11) are in the shape of a disk, the seed filling shell (2) and the air suction shell (11) are connected to form an installation cavity, a seed discharging disk (8) is installed in the installation cavity, a through hole (1102) is formed on the air suction shell (11), a transmission device (4) is arranged in the through hole (1102) to drive the seed discharging disk (8) to rotate, a seed suction hole (803) is provided on the plane edge of the seed discharging disk (8), an air chamber (1104) is formed in the air suction shell (11), the seed suction hole (803) is connected to the air chamber (1104), and the air chamber (1104) is also connected to a negative pressure device, a seed inlet (203) is provided on the seed filling shell (2), seeds enter the installation cavity along the seed inlet (203), and the side of the seed filling shell (2) A seed dropping channel (201) is provided on the top, the seed suction hole (803) passes through the seed dropping channel (201) from top to bottom, the seed dropping channel (201) is connected to the seed guide tube (3), the seeds are discharged into the seed guide tube (3) along the seed dropping channel (201), and the seeds are discharged from the seed guide tube (3) to the outside, and a bracket (904) is installed above the seed dropping channel (201) in the air suction shell (11), and the A rotating shaft (903) is rotatably mounted on the bracket (904), a seeding wheel (902) is fixed on the rotating shaft (903), seeding ends (905) are formed on the seeding wheel (902) at equal intervals in the circumferential direction, the seeding disc (8) drives the seeding wheel (902) to rotate, the seeding end (905) is inserted into the seed suction hole (803), and the seeding end (905) pushes the seeds to fall into the seeding channel (201); The seed-discharging disc (8) is formed with an inner ring seed-stirring portion (801) and an outer ring seed-stirring portion (802) protruding on one side of the seed-filling shell (2); the inner ring seed-stirring portion (801) is formed with triangular teeth in the circumferential direction; the outer ring seed-stirring portion (802) is equidistantly installed in the circumferential direction of the outer ring of the inner ring seed-stirring portion (801); gaps are formed between adjacent outer ring seed-stirring portions (802); the tips of the triangular teeth correspond to the gaps one by one; the outer ring seed-stirring portion (802) is formed with a guide surface (805) in the radial direction; the plane where the guide surface (805) is located passes through the seed-absorbing hole (803); The outer ring seed stirring portion (802) is in the shape of a rounded rectangle, and the guide surfaces (805) include two groups. The guide surfaces (805) are arranged on two opposite sides of the outer ring seed stirring portion (802), and the guide surfaces (805) are transitioned through arc surfaces. The seeds are respectively guided into the seed suction holes (803) corresponding to the guide surfaces (805) through the guide surfaces (805) on both sides of the outer ring seed stirring portion (802).

2. The air-suction soybean precision seed metering device according to claim 1, characterized in that: A seed guide groove (804) is formed on one side of the seed suction hole (803) close to the center of the seed dispensing disk (8), and the seed guide groove (804) is in the shape of an elongated strip, and the bottom surface of the seed guide groove (804) is lower than the plane of the seed dispensing disk (8).

3. The air-suction soybean precision seed metering device according to claim 1, characterized in that: The seed filling shell (2) is provided with a seed inlet (203), and seed filling installation grooves (208) are installed on both sides of the seed inlet (203). A seed filling tube (1) is inserted into the seed filling installation groove (208), and the seed filling tube (1) is in the shape of a dustpan. Mounting guide rails (101) are formed on both sides of the seed filling tube (1), and the mounting guide rails (101) are inserted into the seed filling installation groove (208). A flange is formed at the top of the mounting guide rail (101), and a mounting hole (103) is formed on the flange. A fixing hole (209) is formed at the top of the seed filling installation groove (208). Bolts are passed through the mounting holes (103) and the fixing holes (209) to fasten the seed filling tube (1) to the seed filling shell (2). A seed filling baffle (102) is installed at the upper end of the seed filling tube (1), and the seed filling baffle (102) is higher than the seed filling shell (2).

4. The air-suction soybean precision seed metering device according to claim 1, characterized in that: A hexagonal hole is formed at the center of the seeding disc (8); the transmission device (4) comprises a transmission shaft (401); the transmission shaft (401) is hexagonal and inserted into the hexagonal hole; a bearing (402) is installed in the through hole (1102); the transmission shaft (401) passes through the bearing (402) and is connected to a rotating motor outside the air suction shell (11).

5. The air-suction soybean precision seed metering device according to claim 1, characterized in that: A blower motor (901) is installed on the bracket (904), an exhaust hole (906) is formed at the seed dropping end (905), an air flow duct is formed in the rotating shaft (903), the blower motor (901) is connected to the exhaust hole (906) through the air flow duct, the exhaust hole (906) discharges air flow outward, and the air flow contacts the seeds.

6. The air-suction soybean precision seed metering device according to claim 1, characterized in that: In the seed filling shell (2), a seed blocking plate (202) is formed on one side of the seed dropping channel (201), and the seed blocking plate (202) is provided with a seed guide installation groove (205). A seed guide rail (302) is formed on the seed guide tube (3), and the seed guide rail (302) is inserted into the seed guide installation groove (205). A seed guide baffle (301) is formed on the upper end of the seed guide tube (3) near the seed discharging disk (8), and a pipe sleeve (303) is inserted at the end of the seed guide tube (3), and a screw hole is formed on the pipe sleeve (303), and a connecting screw (305) is rotatably installed in the screw hole. An anti-jump baffle (304) is installed on the connecting screw (305), and the plane where the anti-jump baffle (304) is located is parallel to the seed moving direction.

7. The air-suction soybean precision seed metering device according to claim 6, characterized in that: A cylindrical shaft (204) is formed at the lower end of the seed baffle plate (202), and a seed unloading baffle plate (7) is rotatably mounted on the cylindrical shaft (204). A notch is formed on the bottom thickness surface of the seed filling shell (2), and the seed unloading baffle plate (7) is blocked on the notch. A hook (702) is installed on the end of the seed unloading baffle plate (7) away from the cylindrical shaft (204), and a buckle (6) is installed on the thickness surface of the seed filling shell (2), and the buckle (6) and the hook (702) are detachably connected.

8. The air-suction soybean precision seed metering device according to claim 1, characterized in that: A seed scraper (5) is detachably mounted in the seed filling shell (2); the seed scraper (5) is sawtooth-shaped; the blade of the seed scraper (5) is parallel to the seed dispensing disc (8); and the seed scraper (5) scrapes away seeds in the seed suction hole (803).

9. The air-suction soybean precision seed metering device according to claim 1, characterized in that: The air chamber (1104) is a C-shaped groove body, a groove (1101) is formed on the groove body, a sealing ring (10) is installed in the groove (1101), the sealing ring (10) is in contact with the seed plate (8), the bracket (904) is installed at the notch of the air chamber (1104), an air suction pipe (1105) is formed on the air suction shell (11), the air suction pipe (1105) is connected to the negative pressure device, and an air intake fence (207) is also provided on the upper side of the seed filling shell (2).

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