Internal-seed-filling air-suction type seed-metering device for large-particle-size seeds

Abstract

The invention relates to an inner seed filling air suction type seed metering device for large-particle-size seeds. The inner seed filling air suction type seed metering device comprises a seed metering mechanism, a chassis, a seed throwing mechanism, an air chamber, a driving shaft, a transmission reversing structure and a driven shaft, the driving shaft is rotationally connected to the center of the chassis, the seed metering mechanism is fixedly connected with the driving shaft and abuts against the chassis, the air chamber is embedded in the outer side of the seed metering mechanism and is connected to the negative pressure device, the seed throwing mechanism is arranged below the chassis, the driving shaft is connected with the driven shaft after the transmission direction of the driving shaft is adjusted through the transmission reversing structure, and the driven shaft is connected with the circulating distributor; according to the invention, the manpower resource investment in the seeding process can be reduced, the seed loss in the seeding process is reduced, a stable seed flow is formed in the seeding device, the seed filling efficiency is high, and the seed falling posture of seeds is standardized, so that the seeding uniformity is ensured, the seeding efficiency is high, and the germination rate and the survival rate of the seeds are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of sowing equipment, and in particular to an internally filled air-suction seed metering device for large-diameter seeds. Background Art

[0002] At present, the sowing method of large-size seeds is mostly manual sowing, which is slow, especially for large-scale sowing during the busy farming season. It takes a lot of time and manpower, and it is difficult to meet the sowing time requirements; manual sowing has problems such as uneven seed spacing and depth, which can easily affect the crop growth cycle and yield. In the prior art, there are some small-size seed metering devices on the market, but there are few that are suitable for large-size seeds. Large-size seeds are larger in size and weight, and have higher requirements on seed appearance. They are prone to falling off and seed damage during operation, thereby reducing seeding efficiency. Summary of the invention

[0003] In order to solve or partially solve the problems existing in the related technology, the present application provides an internal seed-filling air-suction seed metering device for large-size seeds. The device can reduce the human resource investment in the seeding process, reduce seed loss in the seeding process, and standardize the seed landing posture, thereby ensuring the uniformity of sowing, high seeding efficiency, and effectively improving the seed germination rate and survival rate.

[0004] The present application discloses an internal seed filling air suction type seed metering device for large-diameter seeds, comprising:

[0005] The seeding mechanism is a circular seeding disc with suction holes on its annular surface and a connecting rod on its top;

[0006] The chassis is set in a disc shape, and three partitions are constructed on it to divide the disc surface into a seed filling area, a seed cleaning area and a seed throwing area, and a seed throwing port is constructed in the seed throwing area;

[0007] The seeding mechanism is a box structure, in which a circulating distributor is constructed;

[0008] An air chamber, the air chamber is set in a C shape, the bottom of which is configured with an air chamber ear plate, the inner side of which is configured with an air chamber cavity, and the outer side of which is configured with a negative pressure interface connected to the air chamber cavity; and a driving shaft, a transmission reversing structure, and a driven shaft;

[0009] Among them, the driving shaft is connected to the center of the chassis, the seeding mechanism is fixedly connected to the driving shaft and abuts against the chassis, the air chamber is embedded in the outside of the seeding device and connected to the negative pressure device, the seeding mechanism is arranged at the bottom of the chassis, and the driving shaft is connected to the driven shaft after the transmission direction is changed through the transmission reversing structure, and the driven shaft is connected to the circulating distributor.

[0010] Optionally, three connecting rods are arranged on the top of the seed-discharging mechanism, a rotating shaft cylinder is arranged at the intersection of the three connecting rods, and the driving shaft is arranged in the rotating shaft cylinder and fixed by a key connection.

[0011] Optionally, an upper positioning platform is further constructed on the upper outer side of the seeding disk, and the air chamber is nested in the upper positioning platform and can rotate relative to the seeding disk.

[0012] Optionally, a plurality of suction holes are arranged at intervals, a seed filling chamfer is constructed at the suction hole opening of each suction hole, and a seed filling inclined surface is also constructed between the seed filling chamfer and the suction hole.

[0013] Optionally, a lower positioning platform is constructed at the edge of the chassis, a chassis ear plate is constructed on the outer side of the lower positioning platform, the seeding disc and the air chamber are located on the lower positioning platform, and the air chamber ear plate and the chassis ear plate are fastened by screws.

[0014] Optionally, the end of one of the partitions of the chassis is connected to a short seed cleaning brush, and the ends of the other two partitions are connected to long seed cleaning brushes.

[0015] Optionally, a rotating shaft seat is constructed at the center of the chassis, a bearing is arranged on the rotating shaft seat, and the driving shaft is connected in the rotating shaft seat.

[0016] Optionally, the chassis is provided with a fan-shaped slope structure which is inclined from the rotating shaft seat to the positioning platform downward, and a leakage seeding groove is also constructed in the seeding area.

[0017] Optionally, the seeding mechanism includes a circulating distributor and a box that wraps the circulating distributor, the box is composed of a shell and a cover plate arranged on the shell, the top of the box is provided with a seed inlet facing the seeding port, and the bottom of the box is provided with a seed discharge port; the circulating distributor includes a driving wheel, a driven wheel, a transmission belt, and a rubber plate, a key slot is arranged in the middle of the driving wheel, the driven shaft is inserted in the key slot and drives the driving wheel to be connected in the box, the driven wheel is connected in the box and is transmitted to the driving wheel through the transmission belt, and a rubber plate is fixedly connected to the transmission belt, and the end of the rubber plate is not more than 0.5 cm away from the shell.

[0018] Optionally, an adjustable exit baffle is connected to the seed discharge port.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] The device drives the seed population to form a stable seed flow through the rotation of the seed-feeding mechanism, ensuring the fluidity of the seed population, thereby improving the seed filling efficiency. The seeds enter the suction holes and, under the action of the air pressure on and off of the air chambers in the seed filling area, the seed clearing area and the seed throwing area, rely on the seed's own gravity to complete the seeding process. Each suction hole can only absorb and accommodate one seed, thereby alleviating the problems of reseeding and missed seeding, and a missed seeding groove is provided to prevent the previous missed seeding from affecting the subsequent seeding. After the seeding process is completed, the seeds fall into the seed throwing mechanism, which not only offsets the centrifugal force problem caused by the internal seed filling type seeding, but also ensures that the seeds are accurately seeded through the seed throwing mechanism, and there is no deviation between the actual seeding position and the expected seeding position.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0023] Figure 1 It is a structural schematic diagram shown in an embodiment of the present application;

[0024] Figure 2 It is a front view of an embodiment of the present application;

[0025] Figure 3 is a top view of an embodiment of the present application;

[0026] Figure 4 is a side view of an embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the structure of the seeding mechanism shown in the embodiment of the present application;

[0028] Figure 6 is a schematic diagram of the structure of a chassis shown in an embodiment of the present application;

[0029] Figure 7 It is a structural schematic diagram of a seeding disc shown in an embodiment of the present application;

[0030] Figure 8 is an exploded view of an embodiment of the present application;

[0031] Reference numerals:

[0032] 1. Driving shaft; 11. Transmission reversing structure; 12. Driven shaft; 13. Bearing; 14. Protective housing;

[0033] 2. Seed metering mechanism; 21. Seed metering disc; 22. Connecting rod; 23. Rotating shaft cylinder; 24. Seeding chamfer; 25. Seed inversion slope; 26. Suction hole; 27. Upper positioning platform;

[0034] 3. Chassis; 31. Short seed cleaning brush; 32. Long seed cleaning brush; 33. Partition board; 34. Slope structure; 35. Rotating shaft seat; 36. Chassis ear plate; 37. Lower positioning platform; 301. Seed filling area; 302. Primary seed cleaning area; 303. Seed dropping area; 3031. Seed dropping port; 3032. Missed seeding groove;

[0035] 4. Seed dropping mechanism; 41. Driving wheel; 42. Driven wheel; 43. Transmission belt; 44. Housing; 45. Cover plate; 46. Keyway; 47. Seed dropping ear plate; 48. Ejection baffle; 49. Rubber plate; 401. Seed inlet; 402. Seed metering outlet;

[0036] 5. Air chamber; 51. Negative pressure interface; 52. Air chamber ear plate; 53. Air chamber cavity. Detailed implementation manners

[0037] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0038] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0040] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 this application can be understood according to specific circumstances.

[0041] In view of the above problems, an embodiment of the present application provides an internally-filled air-suction seed metering device for large-diameter seeds. The technical solution of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention discloses an internal seed filling air suction type seed metering device for large-size seeds, comprising:

[0043] The seeding mechanism 2 is used to absorb and arrange the seeds. The present application makes the seeding mechanism 2 annular, and has a suction hole 26 for taking seeds on its annular surface, and a connecting rod 22 is arranged on its top to facilitate the rotation of the seeding mechanism 2. The present application also includes a chassis 3, which is arranged in a disc shape, and has three partitions 33 arranged on it to divide the disc surface into a seed filling area 301, a seed cleaning area 302 and a seed throwing area 303, and a seed throwing port 3031 is arranged in the seed throwing area 303. The present application also includes a seed throwing mechanism 4, which is a box structure, and has a circulating distributor arranged therein for arranging the seeds. The present application also provides an air chamber 5, which is arranged in a C shape, and has an air chamber ear plate 52 at its bottom, an air chamber cavity 53 arranged on its inner side, and a negative pressure interface 51 connected to the air chamber cavity 53 arranged on its outer side. The transmission of the present device is carried out through the driving shaft 1, the transmission reversing structure 11, and the driven shaft 12.

[0044] Specifically, the driving shaft 1 is connected to the center of the chassis 3, the seeding mechanism 2 is fixedly connected to the driving shaft 1 and abuts against the chassis 3 so that the seeding mechanism 2 can rotate relative to the chassis 3 as the driving shaft 1 rotates, the air chamber 5 is embedded in the outer side of the seeding mechanism 2 and connected to the negative pressure device to provide negative pressure for the seeding mechanism 2 to absorb seeds, the seeding mechanism 4 is arranged below the chassis 3, and the driving shaft 1 is connected to the driven shaft 12 after the transmission direction is changed by the transmission reversing structure 11, and the driven shaft 12 is connected to the circulating distributor.

[0045] In the present application, the driving shaft 1 is connected to a rotating power source to provide the rotating power of the driving shaft 1. Of course, a cover covering the entire seeding mechanism 2 can be set on the chassis 3 as needed, and a motor can be set on the top of the cover to drive the rotation of the driving shaft 1.

[0046] In this application, the rotation of the seed metering mechanism 2 drives the formation of a stable seed flow in the population, ensuring the fluidity of the seed population, thereby improving the seed filling efficiency. Seeds enter the suction holes 26 in the seed filling area 301, the first seed cleaning area 302, and under the on-off action of the air chamber pressure in the seed throwing area 303, relying on the gravity of the seeds themselves, the seed metering process is completed. Each suction hole 26 can only adsorb and hold one seed, thus alleviating the problems of multiple seeding and missed seeding, and a missed seeding groove is provided to avoid the impact of previous missed seeding on subsequent seed metering; after the seed metering process ends, the seeds fall into the seed throwing mechanism 4, which not only offsets the centrifugal force problem caused by internal seed filling type seed metering, but also can ensure the accurate placement of the seeds through the seed throwing mechanism 4, and there is no deviation between the actual seed metering position and the expected seed metering position.

[0047] In one embodiment, as Figure 1 、 Figure 3 and Figure 7 shown, the seed metering mechanism 2 is an annular seed metering disc 21, on whose annular surface suction holes 26 are formed. Twelve suction holes 26 are arranged at intervals. At the suction hole opening of each suction hole 26, a seed filling chamfer 24 is formed, and an inverted seed inclined surface 25 is also formed between the seed filling chamfer 24 and the suction hole 26. Since it is necessary to ensure high-speed seed metering, for a disc-type seed metering device, too few suction holes 26 will cause too high a rotational speed of the seed disc, which is not conducive to seed filling. However, for an internal seed filling type seed metering device, a high rotational speed will increase the centrifugal force, which is instead conducive to seed filling. Therefore, arranging 12 suction holes 26 can not only balance the air pressure requirements but also ensure high-speed seed metering. At the same time, 12 through groove holes are evenly arranged along the circumferential direction on one side of the seed metering disc 21 facing the front housing, and the innermost seed filling chamfer 24 of the suction hole 26 is provided to facilitate the adsorption of seeds into the suction hole. The inverted seed inclined surface 25 outside the seed filling chamfer 24 can reduce the occurrence of multiple seeding phenomena, and the through groove holes serve as the suction holes 26 to add negative pressure to the population through the air chamber.

[0048] Three connecting rods 22 are provided at the top of the seed metering disc 21 of this application. The included angle of the three connecting rods 22 is 120°. A rotating shaft cylinder 23 is provided at their intersection. The main shaft 1 is arranged in the rotating shaft cylinder 23 and is fixed by key connection. In this way, it is convenient for the overall installation of the seed metering mechanism 2, which not only ensures uniform transmission but also does not affect the replenishment of seeds to the seed filling area at any time. The seed metering mechanism 2 is powered by the main shaft. An upper positioning platform 27 is also formed outside the upper part of the seed metering disc 21. The air chamber 5 is nested in the upper positioning platform 27 and can rotate relative to the seed metering disc 21. The air chamber 5 is fixed to the machine body around the seed metering mechanism 2. The seed throwing mechanism 4 is connected to the main shaft 1 and realizes power transmission through the transmission reversing structure 11.

[0049] In this application, as Figure 6 and Figure 8As shown, the chassis 3 is configured to be disc-shaped, and three partitions 33 are constructed thereon to divide the disc surface into a seed filling area 301, a primary seed cleaning area 302 and a seed throwing area 303, and a seed throwing port 3031 and a leakage seeding slot 3032 are constructed in the seed throwing area 303; the end of one of the partitions 33 of the chassis 3 is connected to a short seed cleaning brush 31, and the ends of the other two partitions 33 are connected to long seed cleaning brushes 32. A lower positioning platform 37 is constructed at the edge of the chassis 3, and a chassis ear plate 36 is constructed on the outer side of the lower positioning platform 37. The seed disc 21 and the air chamber 5 are located on the lower positioning platform 37, and the air chamber ear plate 52 and the chassis ear plate 36 are fastened with screws. A rotating shaft seat 35 is constructed in the center of the chassis 3, and a bearing 13 is arranged on the rotating shaft seat 35. The driving shaft 1 is connected to the rotating shaft seat 35, and a fan-shaped slope structure 34 is inclined from the rotating shaft seat 35 to the lower positioning platform 37 of the chassis 3.

[0050] In the present application, three partitions 33 on the chassis 3 divide the chassis into three parts. The seeds first enter the seed filling area 301 to be seeded on the seeding mechanism 2, then enter the primary seed cleaning area 302 to remove excess seeds, and finally enter the seeding area 303 to be seeded. When entering the seeding area 303, the seeds first pass through the seeding port 3031 and fall into the seeding mechanism 4 from the seeding port 3031. A missed seeding slot 3032 for storing missed seeds is designed behind the seeding port 3031 to prevent the missed seeds from being discharged in time and entering the next working cycle of the seeding disk. Seed cleaning brushes are installed on the three partitions. Long seed cleaning brushes 32 are installed on the two partitions adjacent to the seeding area 303, which can effectively remove excess seeds on the suction holes 26. At the same time, a short seed cleaning brush 31 is installed on the other partition, which can perform the first simple seed cleaning and prevent a large number of seeds in the seeding area 303 from entering the primary seed cleaning area to cause reseeding. The bottom plate 3 has a sloping surface structure with a slope of 28 degrees, which can achieve better seed filling efficiency and will not cause greater pressure on the seeding plate to affect the rotation of the seeding plate to absorb seeds.

[0051] In this application, if Figure 2 , Figure 3 and Figure 8 As shown, the air chamber 5 is set in a C shape with an arc of 240 degrees, and an air chamber ear plate 52 is constructed at the bottom, an air chamber cavity 53 is constructed on the inner side, and a negative pressure interface 51 connected to the air chamber cavity 53 is constructed on the outer side. The air chamber 5 is tightly fixed around the seeding disc 21, surrounding the seed filling area 301 and the primary seed cleaning area 302, and a negative pressure device is connected to the negative pressure interface 51 to provide negative pressure for the air chamber 5.

[0052] In this application, if Figure 4 and Figure 5As shown in the figure, the seed dropping mechanism 4 includes a circulating distributor and a box body that encloses the circulating distributor. The box body is constructed by a housing 44 and cover plates 45 provided on both sides of the housing 44. An inlet seed port 401 is constructed at the top of the box body and is directly opposite to the seed dropping port 3031, and a seed discharging port 402 is constructed at the bottom of the box body. The circulating distributor includes a driving wheel 41, a driven wheel 42, a transmission belt 43, and a rubber plate 49. A keyway 46 is constructed in the middle of the driving wheel 41. The driven shaft 12 is inserted into the keyway 46 and drives the driving wheel 41 to be rotatably connected in the box body. The driven wheel 42 is rotatably connected in the box body and is driven by the transmission belt 43 to be in transmission connection with the driving wheel 41. The rubber plate 49 is fixedly connected to the transmission belt 43, and the end of the rubber plate 49 is no more than 0.5 cm away from the housing 44 to avoid seed jamming.

[0053] The driving wheel 41 and the driven wheel 42 of the seed dropping mechanism 4 adopt belt transmission, which has stable transmission and ensures that the transmission ratio of the two wheels remains unchanged. There are multiple rubber plates 49 on the transmission belt 43, and the interval between every two rubber plates 49 can only accommodate the seeds dropped from one suction hole of the seed discharging disc, which is a fully constrained seed dropping mechanism. It effectively reduces the seed dropping height, reduces the random bouncing of seeds, achieves the effect of zero-speed seed dropping, enables the seeds to fall vertically, and reduces the plant spacing error of the seeds. An adjustable ejection baffle 48 is connected and arranged at the seed discharging port 402, and an arc-shaped sliding adjustable mechanism connected by a shaft is adopted to make its angle adjustable. When the plant spacing changes, the rotational speed of the driving shaft changes, which in turn causes the rotational speed of the driven synchronous pulley for seed dropping to change, and finally causes the seed ejection speed to change, and it cannot be consistent with the traveling speed of the machine. The seed dropping baffle is set to change the ejection angle of the seeds to achieve stable seed discharging.

[0054] The present invention provides a new seed discharging solution for large-diameter seeds. By rotating the seed discharging disc to drive the formation of a stable seed flow in the population, it ensures the fluidity of the population, thereby improving the seed filling efficiency. The seeds enter the seed filling holes and, under the on-off action of the air chamber pressures in the seed filling area and the seed discharging area, rely on the self-gravity of the seeds to complete the seed discharging process. Only one seed can be adsorbed and accommodated in each adsorption groove, thus alleviating the problems of double seeding and missed seeding, and there is a missed seeding groove to avoid the influence of previous missed seeding on subsequent seed discharging; after the seed discharging process ends, the seeds fall into the seed dropping device, which not only offsets the centrifugal force problem caused by internal seed filling type seed discharging, but also ensures accurate seed discharging in place, and there is no deviation between the actual seed discharging position and the expected seed discharging position.

[0055] In this application, the following preparatory installation work needs to be done before starting work: align the air chamber ear plate 52 of the air chamber 5 with the chassis ear plate 36 of the chassis 3, and jointly fix them on the machine through bolts. Similarly, fix the seed dropping ear plate 47 of the seed dropping mechanism 4 to the machine through bolts, and connect the negative pressure device to the negative pressure interface 51. Add seeds from above to the seed filling area 301 of the chassis 3, and the seeds will slide along the slope structure 34 towards the seed discharging disc 21.

[0056] After starting work, the driving shaft 1 rotates. Since the seed metering mechanism 2 is fixedly connected to the driving shaft 1 by a key, the driving shaft 1 also rotates and works together. Two pairs of meshing helical gears are arranged below the driving shaft 1 as the transmission reversing structure 11 to rotate simultaneously, driving the driven shaft 12 to rotate and driving the seed throwing mechanism 4 to work simultaneously. The driven shaft 12 drives the driving wheel 41 in the seed throwing mechanism 4 to rotate. The driving wheel 41 is connected to the driven wheel 42 by a belt chain or directly by a belt. While the transmission belt 43 works, the rubber plate 49 above moves with the rotation of the belt, and the seed throwing device starts to work. A protective housing 14 is provided at the transmission reversing structure 11 to protect the two rotating shafts.

[0057] Due to the influence of gravity on the chassis slope structure 34 and the negative pressure in the air chamber 5, the seeds will move towards the seed metering disc 21 and accumulate near the suction holes 26. Due to the existence of the seed filling chamfer 24, one to three seeds will be adsorbed around each suction hole. However, as the seed metering disc 21 rotates and there is an inverted seed slope 25, the space for the seeds to move towards the air chamber is only enough for one seed to occupy. The excess seeds will fall back into the seed population during rotation and wait for the next seed filling process. After the seeds are inhaled into the seed filling chamfer 24 for a period of time, they will first pass through a partition 33 and a short seed cleaning brush 31. This device can intercept a large number of seeds to prevent them from entering the primary seed cleaning area. The short seed cleaning brush can briefly clean the area near the suction holes and has a simple cleaning effect on the filling of multiple seeds. At the same time, due to the existence of the baffle and the brush, the seeds cannot enter the next area and will return to the seed population along the partition 33, forming a stable seed flow. Due to the continuous rotation of the seed metering disc 21, the seed population maintains the same movement trend, enabling efficient seed filling.

[0058] After the seeds are adsorbed on the seed metering disc 21 and filled in the seed filling area 301, they pass through the primary cleaning by the short seed cleaning brush 31 and come to the primary seed cleaning area 302. Since the suction hole 26 with the inverted seed slope 25 can just adsorb one large-sized seed, when the seeds pass through the primary seed cleaning area 302, some of the excess seeds will fall onto the chassis 3 due to gravity and are not firmly adsorbed. The remaining excess seeds that do not fall in the primary seed cleaning area 302 will be brushed off when passing through the long seed cleaning brush 32 and fall onto the chassis 3, ensuring that there is exactly one seed on each suction hole 26.

[0059] When the seeds pass through the first seed cleaning area 302 to the seed dropping area 303, since the air chamber 5 only covers the seed filling area 301 and the first seed cleaning area 302, the seeds in the suction holes 26 are no longer affected by the air pressure of the air chamber 5 and will fall downward due to their own gravity. At this time, the position of the seeds is above the seed dropping port 3031 and falls into the seed inlet 401 of the seed dropping mechanism 4; in extremely rare special cases, the seeds that fail to fall above the seed dropping port 3031 will move with the seed metering disc 21 to the next seed cleaning cycle. At the initial part of the partition plate 33 in the seed filling area 301, there is a long seed cleaning brush 32 reaching the suction holes directly. The seeds that failed to be discharged in the previous seed metering cycle on the suction holes 26 will be brushed off by the long seed cleaning brush 32 and fall into the missed sowing area 304 of the bottom plate 3 to avoid affecting the next seed metering cycle. Since the number of seeds that fail to fall successfully at the seed dropping port 3031 is extremely small, the space of the missed sowing area 304 is sufficient to accommodate the missed sowing seeds generated by one seed metering operation. Therefore, the seeds in the missed sowing area can be cleaned up uniformly after the seed metering operation is completed.

[0060] The seeds that successfully fall at the seed dropping port 3031 will generate centrifugal force due to the movement of the seed metering disc 21. If they are directly sown on the ground at this time, the sowing will be extremely uneven, the germination rate and survival rate of the seeds cannot be guaranteed, and unified management is impossible. Therefore, the seed dropping mechanism 4 is added. The seeds enter the seed dropping mechanism 4 along the seed inlet 401, fall between the two rubber plates 49, and are carried to the seed dropping port 3031 by the movement of the rubber plates 49 and discharged; thanks to the physical properties of the rubber plates, they will not cause damage to the seeds and have a certain strength to support the gravity of the seeds; by adjusting the tooth number ratio of the two meshing gears of the transmission reversing structure 11, it is ensured that only one seed falls into the two rubber plates 49 of the seed dropping mechanism 4 to ensure that only one seed is discharged in each seed metering operation; there are two adjustable-angle ejection baffles 48 beside the seed outlet 402 below the seed dropping mechanism 4. By adjusting the angle of the ejection baffles 48, it is ensured that the seeds fall vertically to the ground and are discharged without an initial velocity.

[0061] Finally, it should also be noted that in this article, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0062] The unit described as a separating component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed across multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0063] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An internal seed filling air suction type seed metering device for large-size seeds, characterized in that: include: A seeding mechanism (2), wherein the seeding mechanism (2) is a circular ring-shaped seeding disk (21), a suction hole (26) is constructed on its annular surface, and a connecting rod (22) is arranged on its top; A chassis (3), wherein the chassis (3) is configured in a disk shape, and three partitions (33) are constructed on the chassis to divide the disk surface into a seed filling area (301), a seed cleaning area (302) and a seed dropping area (303), and a seed dropping opening (3031) is constructed in the seed dropping area (303); A seeding mechanism (4), wherein the seeding mechanism (4) is a box structure, and a circulating distributor is constructed therein; An air chamber (5), wherein the air chamber (5) is arranged in a C shape, the bottom of which is provided with an air chamber ear plate (52), the inner side of which is provided with an air chamber cavity (53), and the outer side of which is provided with a negative pressure interface (51) communicating with the air chamber cavity (53); and a driving shaft (1), a transmission reversing structure (11), and a driven shaft (12); The driving shaft (1) is connected to the center of the chassis (3); the seeding mechanism (2) is fixedly connected to the driving shaft (1) and abuts against the chassis (3); the air chamber (5) is embedded on the outside of the seeding mechanism (2) and connected to a negative pressure device; the seeding mechanism (4) is arranged below the chassis (3); the driving shaft (1) is connected to the driven shaft (12) after the transmission direction is reversed through a transmission reversing structure (11); and the driven shaft (12) is connected to a circulating distributor.

2. The internal seed filling air suction type seed metering device for large-size seeds according to claim 1, characterized in that: Three connecting rods (22) are arranged on the top of the seeding mechanism (2), a rotating shaft cylinder (23) is arranged at the intersection of the three connecting rods (22), and the driving shaft (1) is arranged in the rotating shaft cylinder (23) and is fixed by a key connection.

3. The internal seed filling air suction type seed metering device for large-size seeds according to claim 2, characterized in that: An upper positioning platform (27) is also constructed on the upper outer side of the seeding disk (21), and the air chamber (5) is nested in the upper positioning platform (27) and can rotate relative to the seeding disk (21).

4. The internal seed filling air suction type seed metering device for large-size seeds according to claim 1, characterized in that: A plurality of the suction holes (26) are arranged at intervals, and a seed filling chamfer (24) is constructed at the suction hole opening of each suction hole (26), and a seed filling inclined surface (25) is also constructed between the seed filling chamfer (24) and the suction hole (26).

5. The internal seed filling air suction type seed metering device for large-size seeds according to claim 1, characterized in that: A lower positioning platform (37) is constructed at the edge of the chassis (3), and a chassis ear plate (36) is constructed on the outer side of the lower positioning platform (37). The seed plate (21) and the air chamber (5) are located on the lower positioning platform (37), and the air chamber ear plate (52) and the chassis ear plate (36) are fastened by screws.

6. The internal seed filling air suction type seed metering device for large-size seeds according to claim 1, characterized in that: A short seed cleaning brush (31) is connected to the end of one of the partitions (33) of the chassis (3), and a long seed cleaning brush (32) is connected to the ends of the other two partitions (33).

7. The internal seed filling air suction type seed metering device for large-size seeds according to claim 5, characterized in that: A rotating shaft seat (35) is structured at the center of the chassis (3), a bearing (13) is arranged on the rotating shaft seat (35), and the driving shaft (1) is connected to the rotating shaft seat (35).

8. The internal seed filling air suction type seed metering device for large-size seeds according to claim 7, characterized in that: The chassis (3) is provided with a fan-shaped slope structure (34) which is inclined from the rotating shaft seat (35) to the positioning platform (37) downwards, and a leakage seeding groove (3032) is also constructed in the seeding area (303).

9. The internal seed filling air suction type seed metering device for large-size seeds according to claim 1, characterized in that: The seeding mechanism (4) comprises a circulating distributor and a box body that wraps the circulating distributor, the box body is constructed by a shell body (44) and a cover plate (45) that covers the shell body (44), the top of the box body is constructed with a seed inlet (401) that faces the seeding inlet (3031), and the bottom of the box body is constructed with a seed discharge port (402); the circulating distributor comprises a driving wheel (41), a driven wheel (42), a transmission belt (43), and a rubber plate (49), the driving wheel (41) is constructed with a keyway (46) in the middle, the driven shaft (12) is inserted into the keyway (46) and drives the driving wheel (41) to transfer into the box body, the driven wheel (42) is transferred into the box body and is transmitted to the driving wheel (41) through the transmission belt (43), the transmission belt (43) is fixedly connected to the rubber plate (49), and the end of the rubber plate (49) is no more than 0.5 cm away from the shell body (44).

10. The internal seed filling air suction type seed metering device for large-size seeds according to claim 9, characterized in that: An adjustable exit baffle (48) is connected to the seed discharging port (402).

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