An air-suction and air-blowing structure for a digital composite seeder

Abstract

This invention relates to the field of sowing equipment technology and discloses an air suction and air blowing structure for a digital composite seeder, including a main support frame. An internal support frame is fixedly mounted inside the main support frame, and a right-side limiting head is fixedly mounted on the top of the internal support frame. By setting seed holes one, two, three, and four on the seed roller, seed holes one, two, three, and four can sequentially adsorb seeds of increasing size. When small seeds need to be adsorbed, the suction and blowing plate and the feeding trough on the storage hopper are adjusted to correspond to seed hole one. When large seeds need to be adsorbed, the suction and blowing plate and the feeding trough on the storage hopper are adjusted to correspond to seed hole four. This allows the device to sow seeds of different sizes while also having the advantage of rapid seed type adjustment, thus solving the problem of existing sowing equipment requiring the replacement of multiple seed suction cups, resulting in low seed sowing efficiency.

Description

Technical Field

[0001] This invention relates to the field of seeding equipment technology, specifically to an air-suction and air-blowing structure for a digital composite seeder. Background Technology

[0002] Seeders are agricultural machines used to plant crop seeds or coated seeds in pellet form. Their main function is to evenly sow seeds into the soil, replacing manual sowing by bending over. Existing seeders can sow seeds of different crops with similar sizes, so the same seed suction cup can be used for sowing. However, the seed sizes of different crops can vary greatly. For example, sesame seeds and corn seeds have a large size difference, so sesame and corn cannot be sown using the same seed suction cup. The seed suction cup needs to be replaced during sowing. Existing seeding equipment can sow many rows at the same time, so multiple seed suction cups need to be replaced, resulting in low seed sowing efficiency. Summary of the Invention

[0003] This invention provides an air-suction and air-blowing structure for a digital composite seeder, which solves the problems mentioned in the background art.

[0004] This invention provides the following technical solution: an air-suction and air-blowing structure for a digital composite seeder, comprising a main support frame, an inner support frame fixedly mounted within the inner cavity of the main support frame, a right-side limiting head fixedly mounted on the top of the inner support frame, a left-side limiting head located to the left of the right-side limiting head, and seed rollers movably sleeved on the outer walls of both the right-side and left-side limiting heads. The outer wall of the seed rollers has a plurality of seed holes 1, 2, 3, and 4, arranged sequentially from left to right. The seeds are evenly arranged, and a suction and blowing disc is movably connected to the inner wall of the seed roller. The outer wall of the suction and blowing disc is provided with a seed suction groove and a seed discharge groove. The outer wall of the suction and blowing disc is provided with a suction pipe connection hole. The outer edge of the seed suction groove is provided with a suction communication hole, which is connected to the suction pipe connection hole. The outer wall of the suction and blowing disc is provided with a blow pipe connection hole. The outer edge of the seed discharge groove is provided with a blow pipe communication hole, which is connected to the blow pipe connection hole. A main shaft is fixedly mounted on the inner wall of the suction and blowing disc. The main shaft is slidably connected to the right limit head and the left limit head.

[0005] As a preferred embodiment of the present invention, the outer wall of the seed roller is provided with a storage hopper, the inner wall of the storage hopper is provided with a feeding groove, the inner wall of the storage hopper is fixedly fitted with a discharge hopper, the inner wall of the storage hopper is fixedly fitted with a discharge hopper, and the bottom of the discharge hopper is fixedly fitted with a discharge pipe.

[0006] As a preferred embodiment of the present invention, a large toothed disc is fixedly mounted on the outer wall of the seed roller, a toothed belt is engaged on the outer edge of the large toothed disc, a small toothed disc is engaged on the inner wall of the toothed belt, a rotating rod is fixedly mounted on the inner wall of the small toothed disc, the rotating rod is fixedly sleeved on the power output shaft of the drive motor, and the drive motor is mounted on the main support.

[0007] As a preferred embodiment of the present invention, the inner wall of the spindle is provided with a transverse hole, and an internal threaded sleeve is fixedly fitted on the inner wall of the transverse hole. A threaded rod is threadedly connected to the inner wall of the internal threaded sleeve, and the threaded rod is fixedly sleeved on the power output shaft of the adjustment servo motor. The adjustment servo motor is fixed on the main support by a mounting bracket.

[0008] As a preferred embodiment of the present invention, the outer edges of the storage hopper and the discharge hopper are both fixedly equipped with connecting brackets, the connecting brackets are fixedly mounted on the main shaft, and both ends of the main shaft are fixedly equipped with fixing brackets, which are fixedly mounted on the main support.

[0009] As a preferred embodiment of the present invention, a front support plate is fixedly mounted on the bottom of the discharge hopper, and a rear support plate is fixedly mounted on the bottom of the storage hopper. The inner walls of the rear support plate and the front support plate are slidably connected with sliding rods, and the sliding rods are fixedly mounted on an internal bracket.

[0010] As a preferred embodiment of the present invention, the outer edge of the suction and blowing plate is provided with a plurality of limiting holes, and a fixed long rod is slidably connected to the inner wall of the limiting holes, and the fixed long rod is fixedly assembled on the fixed bracket.

[0011] As a preferred embodiment of the present invention, a pipe connector is fixedly mounted on the inner wall of the suction pipe connection hole, a seed suction pipe is fixedly mounted on the inner wall of the pipe connector, and a connecting can is fixedly mounted on the end of the seed suction pipe away from the suction and blowing plate. The connecting can is connected to the air inlet of the blower through a long pipe.

[0012] As a preferred embodiment of the present invention, the air outlet of the blower is fixedly connected to a connecting pipe, and a horizontal pipe is fixedly installed at the end of the connecting pipe away from the blower. A seed pipe passes through the inner cavity of the horizontal pipe, and the end of the seed pipe away from the horizontal pipe is installed on the discharge pipe.

[0013] As a preferred embodiment of the present invention, the inner cavity of the horizontal tube is provided with a seed blowing pipe, and the end of the seed blowing pipe away from the horizontal tube is installed on the blowing pipe connection hole. Both the seed suction pipe and the seed blowing pipe pass through the left limiting head.

[0014] The present invention has the following beneficial effects: 1. The air suction and air blowing structure of this digital composite seeder, by setting seed holes one, two, three, and four on the seed roller, allows seeds of varying sizes to be adsorbed sequentially. When small seeds need to be adsorbed, the suction and blowing disc and the feeding trough on the storage hopper are adjusted to correspond to seed hole one. When large seeds need to be adsorbed, the suction and blowing disc and the feeding trough on the storage hopper are adjusted to correspond to seed hole four. This allows the device to sow seeds of different sizes while also having the advantage of quick seed type adjustment. This solves the problem of existing sowing equipment requiring the replacement of multiple seed suction discs, which leads to low seed sowing efficiency.

[0015] 2. The air-suction and air-blowing structure of this digital composite seeder uses a blower to extract air. The seed suction groove on the suction and blowing plate is connected to the seed hole, so the seeds can be adsorbed on the seed roller. When the seeds rotate to the seed discharge groove, the air extracted by the blower will be blown into the seed discharge groove. Then, the air in the seed discharge groove will blow the seeds into the discharge hopper. The seeds in the discharge hopper will pass through the discharge pipe. At this time, the air blown by the blower will blow the seeds in the discharge pipe into the soil. This allows the blower to adsorb and blow the seeds off the seed roller, and at the same time, it can stably blow the seeds into the soil.

[0016] 3. The air suction and air blowing structure of this digital composite seeder sets the storage hopper and discharge hopper at the rear and front ends of the seed drum, respectively. The rear end of the seed drum is the seed adsorption end, and the front end is the seed blowing end. The rotation of the seed drum can complete the adsorption and detachment of seeds. The seeds are sown through the discharge hopper. The blower is set below the seed drum, making the device more compact and taking up less space when stored. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a three-dimensional structural diagram of the back of the present invention; Figure 3 This is a schematic diagram showing the location of the feeding trough in this invention; Figure 4 This is a schematic diagram of the bottom three-dimensional structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the diagram; Figure 6 This is a schematic diagram of the seed roller structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B in the diagram; Figure 8This is a schematic diagram showing the position of the slide bar in this invention; Figure 9 This is a schematic diagram of the internal structure of the seed roller of the present invention; Figure 10 This is a schematic diagram of the suction and blowing plate pipe connection structure of the present invention; Figure 11 This is a schematic diagram of the suction and blowing disc structure of the present invention; Figure 12 This is a schematic cross-sectional view of the seed roller and suction plate of the present invention.

[0018] In the diagram: 1. Main support frame; 2. Internal support frame; 3. Right limit head; 4. Left limit head; 5. Seed roller; 6. Large gear disc; 7. Gear belt; 8. Small gear disc; 9. Rotating rod; 10. Drive motor; 11. Storage hopper; 12. Discharge hopper; 13. Feeding trough; 14. Discharge pipe; 15. Rear support plate; 16. Front support plate; 17. Slide rod; 18. Connecting bracket; 19. Main shaft; 20. Suction and blowing plate; 21. Seed suction trough; 22. Seed discharge trough; 23. Suction tube connection hole; 24. Suction connection hole; 25. Blow tube connection hole; 26. Blowing connection hole; 27. Seed suction pipe; 28. Pipe connector; 29. ​​Connecting tank; 30. Long pipe; 31. Blower; 32. Connecting pipe; 33. Horizontal pipe; 34. Seed blowing pipe; 35. Seed dispensing pipe; 36. Limiting hole; 37. Fixed long rod; 38. Fixed bracket; 39. Horizontal hole; 40. Internal threaded sleeve; 41. Threaded rod; 42. Adjusting servo motor; 43. Mounting bracket; 51. Seed hole one; 52. Seed hole two; 53. Seed hole three; 54. Seed hole four. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-12A digital composite seeder's air-suction and air-blowing structure includes a main support 1. An inner support 2 is fixedly mounted inside the main support 1. A right-side limiting head 3 is fixedly mounted on the top of the inner support 2. A left-side limiting head 4 is located to the left of the right-side limiting head 3. Seed rollers 5 are movably sleeved on the outer walls of both the right-side limiting head 3 and the left-side limiting head 4. The outer wall of the seed roller 5 has several seed holes 51, 52, 53, and 54, arranged evenly from left to right. The inner wall of the cylinder 5 is movably connected to a suction and blowing plate 20. The outer wall of the suction and blowing plate 20 is provided with a seed suction groove 21 and a seed discharge groove 22. The outer wall of the suction and blowing plate 20 is provided with a suction pipe connection hole 23. The outer edge of the seed suction groove 21 is provided with a suction communication hole 24, which is connected to the suction pipe connection hole 23. The outer wall of the suction and blowing plate 20 is provided with a blow pipe connection hole 25. The outer edge of the seed discharge groove 22 is provided with a blow pipe communication hole 26, which is connected to the blow pipe connection hole 25. The inner wall of the suction and blowing plate 20 is fixedly equipped with a main shaft 19, which is slidably connected to the right limit head 3 and the left limit head 4.

[0021] In the above structure, the seed roller 5 is mounted on the internal support 2 via the right limiting head 3 and the left limiting head 4. The seed roller 5 can rotate on the right limiting head 3 and the left limiting head 4. Seed holes 1 (51), 2 (52), 3 (53), and 4 (54) on the seed roller 5 can adsorb seeds of different sizes. When a seed is located on seed hole 1 (51), the rotation of the seed roller 5 can drive the seed to rotate, allowing the seeds in the storage hopper 11 to be removed. The outer wall of the suction and blowing plate 20 is connected to the seed roller. The inner walls of seed roller 5 are in contact with each other, and the gas in the seed suction groove 21, the air suction connecting hole 24 and the suction pipe connecting hole 23 is sucked out, so that the inner cavity of the seed suction groove 21 is in a negative pressure state. Through the cooperation of the seed suction groove 21 and the seed hole 51, the seeds can be adsorbed on the outer wall of the seed roller 5. When the seeds rotate to the seed discharge groove 22, the gas enters the seed discharge groove 22 through the blow pipe connecting hole 25 and the air blowing connecting hole 26. Then the gas blows the seeds off the outer wall of the seed roller 5 through the seed hole 51, so that the seeds can be removed from the seed roller 5.

[0022] In a preferred embodiment: the outer wall of the seed roller 5 is provided with a storage hopper 11, the inner wall of the storage hopper 11 is provided with a feeding groove 12, the inner wall of the storage hopper 11 is fixedly equipped with a discharge hopper 111, the inner wall of the storage hopper 11 is fixedly equipped with a discharge hopper 13, and the bottom of the discharge hopper 13 is fixedly equipped with a discharge pipe 14.

[0023] In the above structure, seeds are poured into the feeding hopper 111, and then the seeds in the feeding hopper 111 fall into the storage hopper 11. At this time, the seeds will enter the feeding trough 12 and come into contact with the seed roller 5. During use, one of the seed holes 1 (51), 2 (52), 3 (53), and 4 (54) corresponds to the feeding trough 12. Then, the seeds are adsorbed by the rotation of the seed roller 5 and taken out from the storage hopper 11. After the seeds leave the seed roller 5, they fall into the discharge hopper 13. Then the seeds continue to fall downwards and are discharged through the discharge pipe 14.

[0024] In a preferred embodiment: a large toothed disc 6 is fixedly mounted on the outer wall of the seed roller 5, a toothed belt 7 is engaged on the outer edge of the large toothed disc 6, a small toothed disc 8 is engaged on the inner wall of the toothed belt 7, a rotating rod 9 is fixedly mounted on the inner wall of the small toothed disc 8, and the rotating rod 9 is fixedly sleeved on the power output shaft of the drive motor 10, and the drive motor 10 is mounted on the main support 1.

[0025] In the above structure, the drive motor 10 rotates to drive the rotating rod 9 to rotate. When the rotating rod 9 rotates, it drives the small gear disk 8 to rotate. When the small gear disk 8 rotates, it drives the toothed belt 7 to rotate. When the toothed belt 7 rotates, it drives the large gear disk 6 to rotate. When the large gear disk 6 rotates, it can drive the seed roller 5 to rotate, so that the seed roller 5 can rotate.

[0026] In a preferred embodiment: a transverse hole 39 is provided on the inner wall of the spindle 19, and an internal threaded sleeve 40 is fixedly fitted on the inner wall of the transverse hole 39. A threaded rod 41 is threadedly connected to the inner wall of the internal threaded sleeve 40. The threaded rod 41 is fixedly sleeved on the power output shaft of the adjusting servo motor 42. The adjusting servo motor 42 is fixed on the main support 1 by a mounting bracket 43.

[0027] In the above structure, the servo motor 42 is adjusted to drive the threaded rod 41 to rotate. When the threaded rod 41 rotates, it can drive the main shaft 19 and the suction plate 20 to move in the seed drum 5, so that the seed suction groove 21 on the suction plate 20 can correspond to the seed hole 1 51, seed hole 2 52, seed hole 3 53 and seed hole 4 54. This allows the device to sow seeds of different sizes by moving the main shaft 19. When sowing small seeds, the seed suction groove 21 on the suction plate 20 is aligned with the seed hole 1 51, and when sowing large seeds, the seed suction groove 21 on the suction plate 20 is aligned with the seed hole 4 54.

[0028] In a preferred embodiment: connecting brackets 18 are fixedly mounted on the outer edges of both the storage hopper 11 and the discharge hopper 13. The connecting brackets 18 are fixedly mounted on the main shaft 19. Fixed brackets 38 are fixedly mounted on both ends of the main shaft 19. The fixed brackets 38 are fixedly mounted on the main body support 1.

[0029] In the above structure, the storage hopper 11 and the discharge hopper 13 are connected by the connecting bracket 18. When the main shaft 19 moves, the connecting bracket 18, the storage hopper 11 and the discharge hopper 13 also move, so that the positions of the feeding groove 12 on the storage hopper 11 and the seed suction groove 21 on the suction and blowing plate 20 correspond to the seed suction holes, so that the seeds can correspond to the corresponding seed suction holes. The fixed bracket 38 plays a supporting role for the main shaft 19.

[0030] In a preferred embodiment: a front support plate 16 is fixedly mounted on the bottom of the discharge hopper 13, and a rear support plate 15 is fixedly mounted on the bottom of the storage hopper 11. The inner walls of the rear support plate 15 and the front support plate 16 are slidably connected with slide rods 17, and the slide rods 17 are fixedly mounted on the internal bracket 2.

[0031] In the above structure, through the arrangement of the rear support plate 15, the front support plate 16, and the slide rod 17, when the discharge hopper 13 and the storage hopper 11 are moving, the front support plate 16 on the discharge hopper 13 and the rear support plate 15 on the storage hopper 11 slide on the slide rod 17. The slide rod 17 can keep the front support plate 16 and the rear support plate 15 in a horizontal state when moving. The slide rod 17 can support the discharge hopper 13 and the storage hopper 11, so that the discharge hopper 13 and the storage hopper 11 will not fall when they contain seeds, and the discharge hopper 13 and the storage hopper 11 will not rub against the seed roller 5. The gap between the discharge hopper 13 and the storage hopper 11 and the seed roller 5 remains stable.

[0032] In a preferred embodiment, the outer edge of the suction and blowing plate 20 is provided with a plurality of limiting holes 36, and the inner wall of the limiting holes 36 is slidably connected with a fixed long rod 37, which is fixedly assembled on the fixed bracket 38.

[0033] In the above structure, by setting the fixed long rod 37, when the main shaft 19 moves, it will drive the suction and blowing plate 20 to move. When the suction and blowing plate 20 moves, it will slide on the fixed long rod 37, which improves the stability of the movement of the suction and blowing plate 20 and allows the suction and blowing plate 20 to move stably in a horizontal state.

[0034] In a preferred embodiment: a pipe connector 28 is fixedly mounted on the inner wall of the suction pipe connection hole 23, a seed suction pipe 27 is fixedly mounted on the inner wall of the pipe connector 28, and a connecting can 29 is fixedly mounted on the end of the seed suction pipe 27 away from the suction and blowing plate 20. The connecting can 29 is connected to the air inlet of the blower 31 through a long pipe 30.

[0035] In the above structure, when the blower 31 is running, air enters the blower 31 through the seed hole 51, the seed suction groove 21, the air suction connection hole 24, the suction pipe connection hole 23, the seed suction pipe 27 and the connecting tank 29, so that the seed suction groove 21 on the suction plate 20 is in a negative pressure state. Since the suction plate 20 is in close contact with the seed roller 5, the seed suction groove 21 on the suction plate 20 is connected to the seed hole 51, so the seeds in the storage hopper 11 can be adsorbed by the seed hole 51.

[0036] In a preferred embodiment: the air outlet of the blower 31 is fixedly connected to a connecting pipe 32, and a horizontal pipe 33 is fixedly installed at the end of the connecting pipe 32 away from the blower 31. A seeding pipe 35 passes through the inner cavity of the horizontal pipe 33, and the end of the seeding pipe 35 away from the horizontal pipe 33 is installed on the discharge pipe 14.

[0037] In the above structure, the gas is drawn by the blower 31 and discharged through the exhaust port. At this time, the gas enters the connecting pipe 32 and then enters the horizontal pipe 33. The gas in the horizontal pipe 33 enters the seeding pipe 35. The seeds located in the discharge pipe 14 are blown downward by the gas in the seeding pipe 35, so that the seeds can be quickly blown into the ground and so that the seeds can be stably sown in the soil.

[0038] In a preferred embodiment: the inner cavity of the horizontal tube 33 is through which the seed blowing pipe 34 passes, and the end of the seed blowing pipe 34 away from the horizontal tube 33 is installed on the blowing pipe connection hole 25. The seed suction pipe 27 and the seed blowing pipe 34 both pass through the left limiting head 4.

[0039] In the above structure, the gas in the horizontal pipe 33 enters the blowing pipe connection hole 25 through the blowing pipe 34, and then the gas in the blowing pipe connection hole 25 enters the seed discharging groove 22 through the blowing air connection hole 26, so that the seed discharging groove 22 is filled with gas. The gas in the seed discharging groove 22 blows the seeds down through the seed hole 51, so that the seeds fall into the discharge hopper 13, and then are blown downward by the gas through the discharge pipe 14.

[0040] Working principle: During use, seeds are poured into the feeding hopper 111, and then the seeds in the feeding hopper 111 fall into the storage hopper 11. Gradually, the feeding trough 12 is filled with seeds. The blower 31 operates to extract air, which then enters the seed suction trough 21 through the seed hole 51, and then enters the blower 31 through the suction connecting hole 24, the suction pipe connecting hole 23, the seed suction pipe 27, the connecting tank 29, and the long pipe 30. At this time, the seed suction trough 21 is in a negative pressure state, and the seed suction trough 21 is connected to the seed hole 51. At this time, the seed hole 51 located on the side of the storage hopper 11 will adsorb seeds, and then the drive... Motor 10 drives rotating rod 9 to rotate, which in turn drives small gear disc 8 to rotate. The rotation of small gear disc 8 drives gear belt 7 to rotate, which in turn drives large gear disc 6 to rotate. The rotation of large gear disc 6 drives seed roller 5 to rotate, which in turn drives the seeds to rotate. When the seeds in seed hole 51 rotate to correspond with the seed discharge groove 22, the gas in blower 31 enters horizontal pipe 33 through connecting pipe 32. The gas in horizontal pipe 33 then enters blowpipe connection hole 25 through blowing pipe 34. The gas in blowpipe connection hole 25 is then blown... The air inlet 26 enters the seed dispensing trough 22, which is connected to the seed hole 51. The air in the seed dispensing trough 22 blows the seeds from the seed hole 51, causing them to fall into the discharge hopper 13 and then into the discharge pipe 14. Air from the horizontal pipe 33 also enters the seed lowering pipe 35, whose outlet is connected to the discharge pipe 14. The air in the seed lowering pipe 35 then blows the seeds from the discharge pipe 14 downwards, allowing them to fall quickly and stably into the furrows in the soil. When larger seeds need to be sown, the servo motor 42 is adjusted... The operation drives the threaded rod 41 to rotate. When the threaded rod 41 rotates, it pulls the main shaft 19 and the suction and blowing plate 20 to move to the right. When the main shaft 19 moves, it also drives the connecting bracket 18, the storage hopper 11 and the discharge hopper 13 to move synchronously, so that the feeding trough 12 corresponds to the seed adsorption hole. When the feeding trough 12 corresponds to the second seed hole 52, the seeds adsorbed by the second seed hole 52 are larger than the seeds adsorbed by the first seed hole 51, the seeds adsorbed by the third seed hole 53 are larger than the seeds adsorbed by the second seed hole 52, and the seeds adsorbed by the fourth seed hole 54 are larger than the seeds adsorbed by the third seed hole 53, so that this device can sow a variety of crops.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air-suction and air-blowing structure for a digital composite seeder, comprising a main support frame (1), characterized in that: The inner cavity of the main support (1) is fixedly equipped with an internal support (2). The top of the internal support (2) is fixedly equipped with a right limiting head (3). A left limiting head (4) is provided on the left side of the right limiting head (3). Seed rollers (5) are movably sleeved on the outer walls of both the right limiting head (3) and the left limiting head (4). The outer wall of the seed roller (5) is provided with several seed holes 1 (51), 2 (52), 3 (53) and 4 (54). The seed holes 1 (51), 2 (52), 3 (53) and 4 (54) are arranged evenly from left to right. A suction and blowing plate (20) is movably connected to the inner wall of the seed roller (5). The outer wall of the suction and blowing plate (20) is provided with a seed suction groove (21) and a seed discharge groove (22). The outer wall of the suction and blowing plate (20) is provided with a suction tube connection hole (23). The outer edge of the seed suction groove (21) is provided with a suction communication hole (24). The suction communication hole (24) is connected to the suction tube connection hole (23). The outer wall of the suction and blowing plate (20) is provided with a blow pipe connection hole (25). The outer edge of the seed discharge groove (22) is provided with a blow pipe communication hole (26). The blow pipe communication hole (26) is connected to the blow pipe connection hole (25). The inner wall of the suction and blowing plate (20) is fixedly equipped with a main shaft (19). The main shaft (19) is slidably connected to the right limit head (3) and the left limit head (4). The inner wall of the main shaft (19) is provided with a transverse hole (39), and an internal threaded sleeve (40) is fixedly fitted on the inner wall of the transverse hole (39). A threaded rod (41) is threadedly connected to the inner wall of the internal threaded sleeve (40). The threaded rod (41) is fixedly sleeved on the power output shaft of the adjustment servo motor (42). The adjustment servo motor (42) is fixed on the main support (1) by a mounting bracket (43). The inner wall of the suction pipe connection hole (23) is fixedly fitted with a pipe connector (28), the inner wall of the pipe connector (28) is fixedly fitted with a seed suction pipe (27), the end of the seed suction pipe (27) away from the suction and blowing plate (20) is fixedly fitted with a connecting can (29), the connecting can (29) is connected to the air inlet of the blower (31) through a long pipe (30), the air outlet of the blower (31) is fixedly fitted with a connecting pipe (32), and the end of the connecting pipe (32) away from the blower (31) is fixedly fitted with a horizontal pipe (33). The inner cavity of the horizontal tube (33) is through which the seed blowing pipe (34) passes. The end of the seed blowing pipe (34) away from the horizontal tube (33) is installed on the blowing pipe connection hole (25). Both the seed suction pipe (27) and the seed blowing pipe (34) pass through the left limiting head (4). The outer wall of the seed roller (5) is provided with a storage hopper (11), the inner wall of the storage hopper (11) is provided with a feeding groove (12), the inner wall of the storage hopper (11) is fixedly equipped with a discharge hopper (111), the inner wall of the storage hopper (11) is fixedly equipped with a discharge hopper (13), and the bottom of the discharge hopper (13) is fixedly equipped with a discharge pipe (14). The outer edges of the storage hopper (11) and the discharge hopper (13) are both fixedly equipped with connecting brackets (18), which are fixedly mounted on the main shaft (19). Both ends of the main shaft (19) are fixedly equipped with fixing brackets (38), which are fixedly mounted on the main body bracket (1). The outer edge of the suction and blowing plate (20) is provided with a number of limiting holes (36), and the inner wall of the limiting hole (36) is slidably connected with a fixed long rod (37), which is fixedly assembled on the fixed bracket (38). The inner cavity of the horizontal tube (33) is through which the seeding pipe (35) passes. The end of the seeding pipe (35) away from the horizontal tube (33) is installed on the discharge pipe (14). Seed hole one, seed hole two, seed hole three and seed hole four can sequentially adsorb seeds from small to large. When sowing seeds of different sizes, the main shaft is moved. When it is necessary to adsorb small seeds, the suction and blowing plate and the feeding trough on the storage hopper are adjusted to correspond to seed hole one. When it is necessary to adsorb large seeds, the suction and blowing plate and the feeding trough on the storage hopper are adjusted to correspond to seed hole four.

2. The air suction and air blowing structure of a digital composite seeder according to claim 1, characterized in that: The outer wall of the seed roller (5) is fixedly fitted with a large toothed disc (6), the outer edge of the large toothed disc (6) is meshed with a toothed belt (7), the inner wall of the toothed belt (7) is meshed with a small toothed disc (8), the inner wall of the small toothed disc (8) is fixedly fitted with a rotating rod (9), the rotating rod (9) is fixedly sleeved on the power output shaft of the drive motor (10), and the drive motor (10) is mounted on the main support (1).

3. The air suction and air blowing structure of a digital composite seeder according to claim 1, characterized in that: The bottom of the discharge hopper (13) is fixedly equipped with a front support plate (16), and the bottom of the storage hopper (11) is fixedly equipped with a rear support plate (15). The inner walls of the rear support plate (15) and the front support plate (16) are slidably connected with slide rods (17), and the slide rods (17) are fixedly mounted on the internal support (2).

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