A digitally controlled intelligent air suction seed meter

Abstract

The invention discloses a numerically controlled intelligent air-suction seed-drilling device, which relates to the technical field of air-suction seed-drilling devices, and comprises a front shell, a rear shell, a seed-drilling disc, a built-in fan, a direct-drive motor and a single-unit intelligent controller for seed-drilling. The front shell is provided with a seed inlet, a seed-drilling outlet and an air inlet, and the rear shell is provided with a built-in fan; a seed-drilling disc is provided with a seed-sucking outlet, a seed-filling chamber is formed between the seed-drilling disc and the front shell, and a negative pressure chamber is formed between the seed-drilling disc and the built-in fan; the seed-drilling disc is connected with a transmission intermediate wheel; the direct-drive motor comprises a stator core and a plurality of magnets, the stator core is fixed on the outer wall surface of a fixed cylinder, and the plurality of magnets are fixed on the transmission intermediate wheel; the invention adopts a built-in motor to directly drive the seed-drilling device, so that the seed-drilling device can run more stably and accurately, and the built-in fan can be adjusted in real time through the single-unit intelligent controller for seed-drilling according to the sowing requirements and the types of crops, so as to achieve the most suitable negative pressure suction force for the seed-drilling device, realize the adjustment of the precision sowing rate of a single seed-drilling device, and achieve the purpose of improving the sowing accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of air-suction seed-metering devices, and in particular to a numerically controlled intelligent air-suction seed-metering device. Background Art

[0002] Sowing is an important part of agriculture, and the quality of sowing will affect the emergence rate in the future. With the development of modern technology, the technical level of seed drills has been further improved. Especially the current precision seed drill, which has the advantages of saving good seeds, no need for thinning, uniform distribution of plants in the field, reasonable density, and conducive to seedling growth. At the same time, precision seeding also saves time, labor and increases production. Therefore, precision seeding has become the main trend now.

[0003] The main factor affecting the sowing quality of precision seeders depends on the performance of the seed meter. It can be said that the seed meter is the heart of the entire seeder. Among traditional seed meters, there are roughly mechanical and pneumatic types. The mechanical type is divided into socket wheel type, vertical disc type, horizontal disc type, inclined disc type, finger clamp type, etc.; while the pneumatic seed meter mainly includes three types: air suction type, air blowing type, and air pressure type. At present, the air suction seed meter has important development prospects in China due to its advantages such as low seed damage rate, stable seeding, more adaptable to the shape and specific gravity of seeds, and suitable for sowing of various types of crops.

[0004] The air-suction seed metering device includes a negative pressure chamber and a seed filling chamber. The negative pressure chambers in the air-suction seed metering devices on traditional seed drills are all connected to the same main pipe through a branch pipe, and the main pipe is connected to the fan. The fan is usually driven by a power device on the seed drill, such as a diesel engine. This structure results in, first, many pipeline structures on the seed drill, which occupy a large volume; second, the negative pressure suction of the seed metering device is difficult to adjust. The different speeds of the diesel engine during the start-up stage and the normal driving stage of the seed drill result in different negative pressure suction; third, the negative pressure suction cannot be adjusted in real time to adapt to the seeds of different crops, which will ultimately make it difficult to control the precision seeding rate.

[0005] Therefore, it is very necessary to develop an air-suction seed metering device with a simple structure and easy-to-control precision seeding rate. Summary of the invention

[0006] The purpose of the present invention is to provide a numerically controlled intelligent air-suction seed meter to solve the problems existing in the prior art. The seed meter is directly driven by a built-in motor, which reduces the power loss of the traditional ground wheel transmission and makes the operation of the seed meter more stable and precise. Not only is the structure simpler, but the speed of the built-in fan can be adjusted in real time through the intelligent controller of the seed metering unit according to the sowing requirements and the type of crops, so as to achieve the most suitable negative pressure suction for the seed meter, realize the adjustment of the precision sowing rate of a single seed meter, and achieve the purpose of improving the sowing accuracy.

[0007] To achieve the above-mentioned purpose, the present invention provides the following scheme: the present invention provides a numerically controlled intelligent air-suction seed metering device, comprising a front shell, a rear shell, a seeding disc, a built-in fan, a direct-drive motor and a single-unit intelligent controller for seeding, the front shell being provided with a seed inlet, a seeding outlet and an air inlet, the rear shell being coaxially provided with a fixed cylinder with openings at both ends, the fixed cylinder being provided with the built-in fan, wherein the inner port of the fixed cylinder is the fan air inlet, and the outer port is the fan air outlet; the seeding disc is provided with seed suction ports arranged along a circular trajectory, the area between the seeding disc and the front shell forming a seed filling chamber, the seeding disc A negative pressure chamber is formed in the area between the disk and the built-in fan; a transmission intermediate wheel is connected to the end of the seeding disk, and the transmission intermediate wheel is connected to the fixed cylinder through a bearing; the direct-drive motor includes a stator core and a plurality of magnets, the stator core is fixed to the outer wall of the fixed cylinder, a winding is wound on the stator core, and a plurality of magnets are fixed to the inner wall of the transmission intermediate wheel, opposite to the stator core, and the polarities of the plurality of magnets are alternately arranged; the seeding unit intelligent controller is electrically connected to the built-in fan and the direct-drive motor, and can adjust the rotation speeds of the built-in fan and the direct-drive motor.

[0008] Preferably, an L-shaped slot is provided on the outer circumferential wall surface of the end of the transmission intermediate wheel, one side of the L-shape is arranged along the axial direction of the transmission intermediate wheel, and the end of this side is connected to the end face of the transmission intermediate wheel, and the other side of the L-shape is arranged along the circumference of the transmission intermediate wheel; a convex column capable of being inserted into the slot is provided along its radial direction on the inner circumferential wall surface of the end of the seed disc.

[0009] Preferably, a wind-proof grinding block is also fixed in the negative pressure chamber, the end face of the wind-proof grinding block is in contact with the inner wall surface of the seed plate and is located on the distribution trajectory of the seed suction port; the wind-proof grinding block is located directly above the seed discharge port.

[0010] Preferably, a partition is fixed on the inner surface of the end of the front shell, a seeding channel is formed between the partition and the side wall of the front shell, the seeding port is located at the bottom of the seeding channel; the air-locking grinding block is located at the top of the seeding channel.

[0011] Preferably, the built-in fan includes a centrifugal impeller, a fan drive motor drivingly connected to the centrifugal impeller, and a negative pressure sensor.

[0012] Preferably, a fixing plate is provided on the inner wall surface of the fixing cylinder, and the fixing plate is provided between the centrifugal impeller and the seeding disk; the fan air inlet is provided in the middle of the fixing plate.

[0013] Preferably, a cover plate is detachably provided at the air outlet of the fan, and an air leakage hole is opened on the cover plate; the fan drive motor is fixed at the center position of the inner side of the cover plate.

[0014] Preferably, the CNC intelligent air suction seeding device also includes a scraper and a yaw motor, the scraper includes a connecting plate, the connecting plate is hinged on the front shell body by a hinge bolt, and the front and rear ends of the hinge bolt are respectively provided with a front blade and a rear blade, and the front blade and the rear blade both have a gap with the surface of the seeding disk; in a natural state, along the circular distribution trajectory of the seed suction port, the front blade is located on the outside of the circular trajectory, and the rear blade is located on the inside of the circular trajectory; along the rotation direction of the seeding disk, the front blade is located in front of the rear blade, and the front edge of the front blade gradually tilts downward and is connected with the circular arc transition of the lower edge of the front blade; the front edge of the rear blade gradually tilts upward and is connected with the circular arc transition of the upper edge of the rear blade; the yaw motor is fixed on the outer end face of the front shell body, and the output shaft of the yaw motor extends into the interior of the front shell body and fixes the eccentric wheel, and the eccentric wheel is located in the strip hole at the end of the connecting plate.

[0015] Preferably, it also includes a precision sowing count sensor and a seed tray seed suction port count sensor fixed on the front shell body, the precision sowing count sensor is used to detect the number of the seed suction ports that have not sucked in seeds, and along the rotation direction of the seed tray, the precision sowing count sensor is located behind the seed scraper; the seed tray seed suction port count sensor is arranged behind the wind-proof grinding block, and is used to monitor the sowing speed and provide reference parameters for the precision sowing count sensor and the seeding unit intelligent controller; the seeding unit intelligent controller is electrically connected to the precision sowing count sensor, the seed tray seed suction port count sensor and the yaw motor; the seeding unit intelligent controller is electrically connected to the main controller of the seeder using RS485.

[0016] Preferably, an isolation cover is fixed on the inner side of the cover plate, and the seeding unit intelligent controller is located inside the isolation cover.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] 1. The present invention equips each seeding device with a built-in fan and directly generates negative pressure by using the built-in fan, thereby replacing the structure of using one air compressor to simultaneously support multiple seeding devices in the prior art seeding machine, which not only reduces the power loss of the traditional seeding machine traction equipment, but also eliminates the traditional air compressor and the pipeline structure connecting the air compressor, making the structure simpler;

[0019] 2. The present invention can adjust the speed of the built-in fan in real time through the intelligent controller of the seeding unit according to the sowing requirements and the types of crops, so as to achieve the most suitable negative pressure suction force for the seeding device, realize the adjustment of the precision sowing rate of a single seeding device, and achieve the purpose of improving the sowing accuracy;

[0020] 3. In the present invention, a direct-drive motor is arranged on the outer side of the fixed cylinder, and the direct-drive motor is utilized to directly drive the seeding disc to rotate, so that the seeding device runs more smoothly, and there is no need to arrange a transmission mechanism such as a reducer. The inner side of the fixed cylinder is provided with a built-in fan and an exhaust duct, so that the structure of the seeding device is very compact, which is beneficial to reducing the volume of the seeding device and is more convenient for installation and transportation.

[0021] Other technical effects that can be achieved by the present invention are described in conjunction with specific implementation methods below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the air suction type seed metering device in the present invention;

[0024] Figure 2 It is a rear view of the air suction type seed metering device in the present invention;

[0025] Figure 3 It is a side sectional view of the air suction type seed metering device in the present invention;

[0026] Figure 4 It is a schematic diagram of the explosion structure of the air suction type seed metering device in the present invention;

[0027] Figure 5 It is a schematic diagram of the internal structure of the air suction type seed metering device;

[0028] Figure 6 It is a schematic diagram of the assembly structure of the seeding disc, the transmission intermediate wheel and the bearing;

[0029] Figure 7 for Figure 6 A side sectional view of

[0030] Figure 8 is a schematic diagram of the structure of the front housing;

[0031] Fig. 9 is a schematic diagram of the structure of the rear housing;

[0032] Fig.10 It is a structural schematic diagram of the seed tray;

[0033] Fig.11 It is a structural schematic diagram of the built-in fan;

[0034] Fig.12 It is a structural schematic diagram of the transmission intermediate wheel;

[0035] Fig.13 It is a schematic diagram of the coordination structure between the yaw motor and the seed scraper;

[0036] Fig.14 for Fig.13 Exploded diagram of the structure;

[0037] Fig.15 It is a structural schematic diagram of the precision seeding counting sensor;

[0038] in,

[0039] 1. Front shell; 11. Seed inlet; 12. Seed discharge port; 13. Air inlet; 14. Partition plate; 15. Seed discharge channel;

[0040] 2. rear housing; 21. fixing cylinder; 22. fan exhaust port; 23. arc-shaped groove; 24. fixing plate; 25. second raised end; 26. fan air inlet;

[0041] 3. Seed plate; 31. Seed suction port; 32. Round plate; 33. Cylinder; 34. Protruding column;

[0042] 4. Centrifugal impeller; 41. Front end plate; 42. Rear end plate; 43. Arc blades; 44. First raised end;

[0043] 5. stator core; 51. arc-shaped protrusion;

[0044] 6. Transmission intermediate wheel; 61. Magnetic steel; 62. Inner ring; 63. Outer ring; 64. Slot; 65. Ball roller;

[0045] 7. Seed filling room;

[0046] 8. Negative pressure room;

[0047] 9. Fan drive motor;

[0048] 10. Cover plate; 101. Air leakage hole;

[0049] 110. Filling the Seed Bowl;

[0050] 120, seed scraper; 121, front blade; 122, rear blade; 123, connecting plate; 124, hinge bolt; 125, strip hole;

[0051] 130. Air-locking grinding block.

[0052] 140. yaw motor; 141. teeth; 142. eccentric wheel; 143. fixing plate; 144. fastening bolt; 145. output shaft; 146. internal threaded hole.

[0053] 150. Precision seeding counting sensor;

[0054] 160. Seed tray suction port counting sensor;

[0055] 170. Isolation cover;

[0056] 180. Intelligent controller for seeding units. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The purpose of the present invention is to provide a numerically controlled intelligent air-suction seed meter to solve the problems existing in the prior art. The seed meter is directly driven by a built-in motor, which reduces the power loss of the traditional ground wheel transmission and makes the operation of the seed meter more stable and precise. Not only is the structure simpler, but the speed of the built-in fan can be adjusted in real time through the intelligent controller of the seed metering unit according to the sowing requirements and the type of crops, so as to achieve the most suitable negative pressure suction for the seed meter, realize the adjustment of the precision sowing rate of a single seed meter, and achieve the purpose of improving the sowing accuracy.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] like Figure 1 to Figure 15As shown, this embodiment provides a numerically controlled intelligent air suction seeding device, including a front housing 1, a rear housing 2, a seeding disc 3, a built-in fan, a direct drive motor and a seeding monomer intelligent controller 180, wherein the front housing 1 and the rear housing 2 are adapted in shape and can be detachably connected by bolts after being buckled. The front housing 1 is provided with a seed inlet 11, a seeding port 12 and an air inlet 13, and a fixed cylinder 21 with two ends opened is coaxially arranged on the end surface of the rear housing 2, and a built-in fan is arranged inside the fixed cylinder 21; the inner port of the fixed cylinder 21 (the inner side refers to the side close to the front housing 1) is the fan air inlet 26, and the outer port is the fan exhaust port 22. The area between the seeding disc 3 and the front housing 1 forms a seed filling chamber 7, and the area between the seeding disc 3 and the built-in fan forms a negative pressure chamber 8, and the speed of the built-in fan in this embodiment is adjustable, and the speed can be adjusted according to different seed sizes to provide corresponding negative pressure suction. There is a gap between the circumferential side wall of the seeding disc 3 and the circumferential inner wall of the front shell 1, and the size of this gap is smaller than the size of the seeds to be sown, so there will be no problem of seeds getting stuck in the gap. The end of the seeding disc 3 is connected to a transmission intermediate wheel 6, and the transmission intermediate wheel 6 is connected to the fixed cylinder 21 through a bearing. The direct drive motor includes a stator core 5 and a plurality of magnetic steels 61, the stator core 5 is fixed to the outer wall surface of the fixed cylinder 21, and a winding is wound on the stator core 5. The plurality of magnetic steels 61 are fixed to the inner wall surface of the transmission intermediate wheel 6, opposite to the stator core 5, and the polarities of the plurality of magnetic steels 61 are alternately arranged. The seeding unit intelligent controller 180 is electrically connected to the built-in fan and the direct drive motor, and can adjust the speed of the built-in fan and the direct drive motor.

[0061] When in use, seeds are filled into the seed filling chamber 7 through the seed inlet 11. The stator core 5 is energized to generate a changing magnetic field to drive the magnetic steel 61 to rotate with the transmission intermediate wheel 6, and the seeding disc 3 rotates synchronously with the transmission intermediate wheel 6. The built-in fan is energized to rotate to exhaust air, forming a negative pressure in the negative pressure chamber 8, and the seeds in the seed filling chamber 7 are adsorbed on the seed suction port 31. As the seeding disc 3 rotates, the seeds adsorbed on the seed suction port 31 fall from above the seeding port 12, completing the sowing.

[0062] First, the embodiment is equipped with a built-in fan in each seeding device, and the built-in fan is used to directly generate negative pressure, which replaces the structural form of the prior art in which one air compressor is used to simultaneously support multiple seeding devices on the seeding machine, which not only reduces the power loss of the traditional seeding machine traction equipment, but also eliminates the traditional air compressor and the pipeline structure connecting the air compressor, making the structure simpler; secondly, the embodiment can adjust the speed of the built-in fan in real time according to the sowing requirements and the type of crops through the seeding monomer intelligent controller 180 to achieve the most suitable negative pressure suction for the seeding device, realize the adjustment of the precision sowing rate of a single seeding device, and achieve the purpose of improving the sowing accuracy; in addition, in the embodiment, a direct drive motor is arranged on the outer side of the fixed cylinder 21, and the direct drive motor is used to directly drive the seeding disc 3 to rotate, so that the seeding device runs more smoothly, and there is no need to set a transmission mechanism such as a reducer. The inner side of the fixed cylinder 21 is a built-in fan and an exhaust channel, so that the structure of the seeding device is very compact, which is conducive to reducing the volume of the seeding device and is more convenient for installation and transportation.

[0063] like Fig.10 , Fig.12 As shown, in this embodiment, an L-shaped slot 64 is provided on the outer circumferential wall surface of the end of the transmission intermediate wheel 6, one side of the L-shaped shape is provided along the axial direction of the transmission intermediate wheel 6, and the end of this side is connected to the end surface of the transmission intermediate wheel 6, and the other side of the L-shaped shape is provided along the circumferential direction of the transmission intermediate wheel 6, and the circumferential extension direction of this side is opposite to the rotation direction of the transmission intermediate wheel 6. The seeding disc 3 includes a cylindrical barrel 33 and a circular plate 32 connected to one end of the cylindrical barrel 33, and a seed suction port 31 is provided on the circular plate 32, and a convex column 34 capable of being inserted into the slot 64 is provided on the inner circumferential wall surface of the other end along its radial direction. The diameter of the convex column 34 is the same as the width of the slot 64. When the seed disc 3 is connected to the transmission intermediate wheel 6, the protrusion 34 is aligned with the slot 64, and the seed disc 3 is buckled on the outer circumferential wall of the transmission intermediate wheel 6. When the seed disc 3 is pushed to the L-shaped corner in the slot 64, the seed disc 3 is rotated along the other side of the slot 64 until the protrusion 34 abuts against the end of the slot 64.

[0064] like Fig. 9 As shown, in this embodiment, a plurality of arcuate grooves 23 are evenly spaced along the circumferential direction on the outer wall surface of the fixing cylinder 21, and a plurality of arcuate protrusions 51 are provided on the inner circumferential wall surface of the stator core 5. When the stator core 5 is installed, the arcuate protrusions 51 are aligned with the arcuate grooves 23 one by one, and the stator core 5 is pushed to the bottom of the fixing cylinder 21.

[0065] Further, such as Fig.12 As shown, in this embodiment, the bearing ball roller 65, the inner ring 62 and the outer ring 63. The inner ring 62 is sleeved on the outer wall surface of the fixed cylinder 21 and has an interference fit with the fixed cylinder 21; the outer ring 63 is fixed on the inner wall of the transmission intermediate wheel 6.

[0066] In order to make the seeds on the seed suction port 31 fall off, a wind-proof grinding block 130 is further fixed in the negative pressure chamber 8 in the present embodiment. The wind-proof grinding block 130 is in contact with the inner wall surface of the seed disk 3 and is located on the distribution trajectory of the seed suction port 31. Although the wind-proof grinding block 130 and the seed discharge port 12 are distributed on both sides of the seed disk 3, when viewed from the front view of the seed disk 3, the wind-proof grinding block 130 is located directly above the seed discharge port 12, that is, when the seed suction port 31 rotates to directly above the seed discharge port 12, the seed suction port 31 is blocked by the wind-proof grinding block 130, the adsorption force on the seeds on the seed suction port 31 disappears, and the seeds fall off from the seed discharge port 12 under the action of gravity.

[0067] like Figure 8 As shown, in this embodiment, a partition 14 is fixed on the inner surface of the end of the front housing 1. There is a gap between the partition 14 and the seeding disc 3, but the gap is not larger than the seed particle size, so the seeds will not pass through the gap. A seeding channel 15 is formed between the partition 14 and the side wall of the rear housing 2, and the seeding port 12 is located at the bottom of the seeding channel 15; the wind-proof grinding block 130 is located at the top of the seeding channel 15. When the seed suction port 31 rotates to the top of the seeding port 12, the seed suction port 31 is blocked by the wind-proof grinding block 130, and the seeds lose the adsorption force and fall into the seeding channel 15 under the action of gravity. Even if there are other seed suction ports 31 that are not blocked by the wind-proof grinding block 130 to adsorb the falling seeds again, the seeds will eventually fall from the seeding port 12 under the blocking effect of the partition 14.

[0068] like Fig.11 As shown, the built-in fan in this embodiment includes a centrifugal impeller 4, a fan drive motor 9 and a negative pressure sensor, and the negative pressure sensor is electrically connected to the seeding unit intelligent controller 180, and is used to feedback the negative pressure value in the negative pressure chamber 8. The centrifugal impeller 4 includes a front end plate 41, a rear end plate 42 and a plurality of arc-shaped blades 43 connected therebetween; the middle part of the front end plate 41 convexly forms a first protruding end 44, and the first protruding end 44 has an opening for air intake; the rear end plate 42 is connected to the fan drive motor 9.

[0069] like Fig. 9 As shown, a fixing plate 24 is provided at the inner port of the fixing cylinder 21, and the fixing plate 24 is provided between the built-in fan and the seeding plate 3; the fixing plate 24 is a second protruding end 25 formed in the middle part toward the negative pressure chamber 8, and the second protruding end 25 is adapted in shape to the first protruding end 44, and the second protruding end 25 has a fan air inlet 26, and the fan air inlet 26 is directly opposite to the end opening of the first protruding end 44. By providing the fixing plate 24 in the fixing cylinder 21, the volume of the negative pressure chamber 8 can be reduced, the negative pressure effect generated by the built-in fan in the negative pressure chamber 8 can be increased, and the adsorption force on the seeds can be improved.

[0070] A mounting seat for mounting the air-tight grinding block 130 is also provided on the fixing plate 24 .

[0071] In this embodiment, a cover plate 10 is detachably provided at the fan exhaust port 22 , and an air leakage hole 101 is opened on the cover plate 10 ; the fan drive motor 9 is fixed at the center position of the inner side of the cover plate 10 .

[0072] In order to facilitate filling of seeds into the seed filling chamber 7, a seed filling bucket 110 is connected to the top of the seed inlet 11 in this embodiment.

[0073] like Figure 5 , Figure 8 , Fig.13 , Fig.14As shown, in this embodiment, a seed scraper 120 is hingedly connected to the inner end surface of the front housing 1 through a hinge bolt 124. Specifically, the seed scraper 120 includes a connecting plate 123, and the middle part of the connecting plate 123 is hingedly connected to the front housing 1 through a hinge bolt 124. On the connecting plate 123, a front blade 121 and a rear blade 122 are respectively arranged on the front and rear sides of the hinge bolt 124. Both the front blade 121 and the rear blade 122 have a certain gap with the surface of the seed disc 3, and the gap is very small, so that the front blade 121 and the rear blade 122 can scrape off the seeds that are partially located inside the seed suction port 31 and partially located outside the seed suction port 31 without generating contact friction with the surface of the seed disc 3, so that they fall; in a natural state, along the circular distribution trajectory of the seed suction port 31, the front blade 121 is located on the outside of the circular trajectory, and the rear blade 122 is located on the inside of the circular trajectory; along the rotation direction of the seed disc 3, the front blade 121 is located in front of the rear blade 122, and the front edge of the front blade 121 gradually tilts downward and is connected to the lower edge of the front blade 121 by a circular arc transition; the front edge of the rear blade 122 gradually tilts upward and is connected to the upper edge of the rear blade 122 by a circular arc transition. A yaw motor 140 is installed at the top of the inner end surface of the front housing 1. The output shaft 145 of the yaw motor 140 extends into the interior of the front housing 1 and fixes the eccentric wheel 142. The eccentric wheel 142 is located in the strip hole 125 at the end of the connecting plate 123. The width of the strip hole 125 is equal to the diameter of the eccentric wheel 142. The output shaft 145 is connected to the eccentric wheel 142 through the teeth 141; specifically, the outer cylindrical surface of the output shaft 145 of the yaw motor 140 is provided with teeth 141, and the middle part is provided with an axial internal threaded hole 146. The fastening bolt 144 passes through the fixing plate 143 and is screwed into the internal threaded hole 146, and the fixing plate 143 is used to press the eccentric wheel 142. When in use, the rotation of the yaw motor 140 can cause the scraper 120 to swing through the eccentric wheel 142, so as to adjust the shielding area of ​​the front blade 121 and the rear blade 122 on the scraper 120 to the seed suction port 31, and change the wind force of the seed suction port 31. At the same time, due to the inclined structure of the ends of the front blade 121 and the thick blade, the position of the seeds can be guided. Some of the seeds adsorbed by the seed suction port 31 are pushed toward the center of the seed suction port 31 to ensure the area where the seeds are acted upon by the adsorption force; when multiple seeds are adsorbed by the seed suction port 31, the front blade 121 or the rear blade 122 can push and guide the seeds, so that the excess seeds can be pushed to the side of the seed suction port 31, causing them to lose the adsorption force and fall off, thereby achieving the purpose of precise sowing.

[0074] like Figure 1 , Fig.15As shown, in order to realize intelligent control of the seed metering device, in this embodiment, a precision sowing counting sensor 150 and a seeding disc seed suction port counting sensor 160 are also provided on the front shell body 1 by screws. The precision sowing counting sensor 150 is used to detect the number of seed suction ports 31 that have not sucked in seeds. Along the rotation direction of the seeding disc 3, the precision sowing counting sensor 150 is located behind the scraper 120; the seeding disc seed suction port counting sensor 160 is arranged behind the air-proof grinding block 130, and the seeding disc seed suction port counting sensor 160 is used to monitor the sowing speed and provide reference parameters for the precision sowing counting sensor 150 and the seeding monomer intelligent controller 180; the CNC intelligent air suction seed metering device also includes a seeding monomer intelligent controller 180, and the seeding monomer intelligent controller 180 is electrically connected to the precision sowing counting sensor 150, the seeding disc seed suction port counting sensor 160 and the fan drive motor 9. The seeding unit intelligent controller 180 adjusts the speed of the built-in fan and the rotation angle of the yaw motor 140 according to the number of missed seeds and the number of precision seeds, so as to achieve the purpose of intelligent adjustment and improve the precision seeding rate.

[0075] Therefore, this embodiment can achieve the following by setting the seeding unit intelligent controller 180 in combination with other structures:

[0076] First, the built-in fan speed is automatically adjusted according to the specific gravity of the sown crop seeds to achieve the purpose of no re-seeding or missing seeds;

[0077] Second, the angle of the seed scraper 120 is automatically adjusted according to the data fed back by the precision seeding counting sensor 150 and the seeding plate seed suction port counting sensor 160 to achieve the purpose of precision seeding;

[0078] Third, the seeding unit intelligent controller 180 has independent computing power, and uses RS485 communication to transmit data bidirectionally with the main controller of the seeder, avoiding the disadvantages of too complicated lines and prone to failure.

[0079] Furthermore, an isolation cover 170 is fixed to the inner side of the cover plate 10 , and the seeding unit intelligent controller 180 is located inside the isolation cover 170 .

[0080] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0081] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. A numerically controlled intelligent air suction seed metering device, characterized in that: The invention comprises a front shell, a rear shell, a seeding disc, a built-in fan, a direct-drive motor and a single-unit intelligent controller for seeding, wherein the front shell is provided with a seed inlet, a seeding outlet and an air inlet, a fixed cylinder with openings at both ends is coaxially arranged in the rear shell, the built-in fan is arranged in the fixed cylinder, wherein the inner port of the fixed cylinder is the fan air inlet, and the outer port is the fan air outlet; the seeding disc is provided with seed suction ports arranged along a circular trajectory, the area between the seeding disc and the front shell forms a seed filling chamber, the seeding disc and the built-in The area between the fans forms a negative pressure chamber; the end of the seeding disc is connected to a transmission intermediate wheel, and the transmission intermediate wheel is connected to the fixed cylinder through a bearing; the direct drive motor includes a stator core and a plurality of magnets, the stator core is fixed to the outer wall of the fixed cylinder, a winding is wound on the stator core, and the plurality of magnets are fixed to the inner wall of the transmission intermediate wheel, opposite to the stator core, and the polarities of the plurality of magnets are alternately arranged; the seeding unit intelligent controller is electrically connected to the built-in fan and the direct drive motor.

2. The CNC intelligent air suction seed metering device according to claim 1 is characterized in that: An L-shaped slot is arranged on the outer circumferential wall surface of the end of the transmission intermediate wheel, one side of the L-shape is arranged along the axial direction of the transmission intermediate wheel, and the end of this side is connected to the end face of the transmission intermediate wheel, and the other side of the L-shape is arranged along the circumferential direction of the transmission intermediate wheel; a convex column capable of being inserted into the slot is arranged along its radial direction on the inner circumferential wall surface of the end of the seed disc.

3. The numerically controlled intelligent air suction seed metering device according to claim 1 is characterized in that: An air-blocking grinding block is also fixed in the negative pressure chamber, the end surface of which is in contact with the inner wall surface of the seed plate and is located on the distribution track of the seed suction port; the air-blocking grinding block is located directly above the seed discharge port.

4. The numerically controlled intelligent air suction seed metering device according to claim 3 is characterized in that: A partition is fixed on the inner surface of the end of the front shell, and a seeding channel is formed between the partition and the side wall of the front shell. The seeding port is located at the bottom of the seeding channel; the air-locking grinding block is located at the top of the seeding channel.

5. The numerically controlled intelligent air suction seed metering device according to claim 1 is characterized in that: The built-in fan includes a centrifugal impeller, a fan drive motor drivingly connected to the centrifugal impeller, and a negative pressure sensor.

6. The numerically controlled intelligent air suction seed metering device according to claim 5 is characterized in that: A fixing plate is arranged on the inner wall surface of the fixing cylinder, and the fixing plate is arranged between the centrifugal impeller and the seeding disk; the fan air inlet is arranged in the middle of the fixing plate.

7. The numerically controlled intelligent air suction seed metering device according to claim 6 is characterized in that: A cover plate is detachably provided at the air outlet of the fan, and an air leakage hole is opened on the cover plate; the fan driving motor is fixed at the center position of the inner side of the cover plate.

8. The numerically controlled intelligent air suction seed metering device according to claim 7 is characterized in that: The CNC intelligent air suction seeding device also includes a scraper and a yaw motor, the scraper includes a connecting plate, the connecting plate is hinged on the front shell body by a hinge bolt, and the front and rear ends of the hinge bolt are respectively provided with a front blade and a rear blade, and the front blade and the rear blade both have a gap with the surface of the seeding disk; in a natural state, along the circular distribution trajectory of the seed suction port, the front blade is located on the outside of the circular trajectory, and the rear blade is located on the inside of the circular trajectory; along the rotation direction of the seeding disk, the front blade is located in front of the rear blade, and the front edge of the front blade gradually tilts downward and is connected with the lower edge of the front blade by a circular arc transition; the front edge of the rear blade gradually tilts upward and is connected with the upper edge of the rear blade by a circular arc transition; the yaw motor is fixed on the outer end face of the front shell body, and the output shaft of the yaw motor extends into the interior of the front shell body and fixes the eccentric wheel, and the eccentric wheel is located in the strip hole at the end of the connecting plate.

9. The numerically controlled intelligent air suction seed metering device according to claim 8, characterized in that: It also includes a precision sowing count sensor and a seed tray seed suction port count sensor fixed on the front shell body, the precision sowing count sensor is used to detect the number of the seed suction ports that have not sucked in seeds, and along the rotation direction of the seed tray, the precision sowing count sensor is located behind the seed scraper; the seed tray seed suction port count sensor is arranged behind the wind-proof grinding block, and is used to monitor the sowing speed and provide reference parameters for the precision sowing count sensor and the seeding unit intelligent controller; the seeding unit intelligent controller is electrically connected to the precision sowing count sensor, the seed tray seed suction port count sensor and the yaw motor; the seeding unit intelligent controller is electrically connected to the main controller of the seeder using RS485.

10. The numerically controlled intelligent air suction seed metering device according to claim 9, characterized in that: An isolation cover is fixed on the inner side of the cover plate, and the seeding unit intelligent controller is located in the isolation cover.

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