A device for sowing seeds in reverse and a seed metering device with secondary discharge and a double-chamber air-suction precision seeder

Abstract

The utility model discloses a kind of reverse seed belt device and secondary discharge's seed metering device and double-bin air suction type precision seeder, it is related to the technical field of seeding machine, solve the seeding machine only applicable to single coarse grain type, and cannot realize double plant and multi-planting, it is difficult to realize the problem of equal spacing and unequal distance planting, front side rack is installed on crossbeam, and crossbeam is connected with rear side rack by connecting rod, still include: fertilizer box, seed box, land wheel, furrow opener, press wheel, seed metering device and reverse seed belt device, the utility model is separately arranged diesel engine drive fan operation, can guarantee the stability of fan operation, and further guarantee the stability of seed metering device operation, i.

Description

Technical Field

[0001] This utility model relates to the technical field of seeders, and in particular to a seed reversing device, a seed metering device with secondary discharge, and a dual-compartment air-suction precision seeder. Background Technology

[0002] Currently, the development of seeder technology suitable for coarse grain production is relatively lagging, and its design concepts and operating modes are difficult to match the urgent needs of modern agriculture for precision, diversification, and efficiency. The core challenges can be summarized as follows:

[0003] Highly specialized, these machines lack versatility. Most grain planters on the market are tailor-made for specific crops (such as millet, mung beans, and sorghum), with their seed metering orifice type, transmission ratio, and furrowing components optimized for the physical characteristics of a single crop (such as seed size, shape, and thousand-grain weight). This highly specialized design means that a single machine can only efficiently plant one type or a few types of grains with highly similar morphologies. For small and medium-sized growers who plan to rotate or intercrop different grains in the same season, multiple specialized machines are required, resulting in a huge initial investment, cumbersome storage and maintenance, and wasted resources.

[0004] Inflexible planting patterns cannot adapt to diverse agronomic requirements, such as:

[0005] The lack of double / multiple plantation patterns: Many miscellaneous grain crops (such as corn and some beans) can effectively utilize light and heat resources and enhance the resilience of the plant population by sowing in pairs or multiple rows, thereby increasing yield. However, the seed metering and delivery systems of existing seeders are mostly designed for single-seed precision sowing. Mechanically, they cannot accurately sow multiple seeds into the same hole in a single application, which limits the implementation of high-yield agronomic techniques.

[0006] Switching between equal and unequal planting patterns is difficult: different grain crops, or even the same crop in different ecological zones, have varying optimal row and plant spacing requirements. For example, to fully utilize edge row advantages or adapt to mechanized cultivation, wide-narrow row planting (unequal row spacing) may be necessary. Adjusting plant spacing on existing seeders typically relies on replacing sprockets, while adjusting row spacing requires physically moving the furrow opener. This process is cumbersome, time-consuming, and labor-intensive, and it's difficult to switch flexibly during operation, failing to meet the requirements of variable-rate operations in precision agriculture.

[0007] Low level of mechanization in intercropping and relay cropping: For intercropping patterns such as coarse grains with soybeans and coarse grains with oilseeds, existing equipment lacks efficient and reliable multi-set planting system integration and synchronous control capabilities, and still relies heavily on manual labor, resulting in low efficiency. Utility Model Content

[0008] In view of the problems mentioned above, existing seeders are only suitable for a single type of grain and cannot achieve double or multiple plant planting, and it is difficult to achieve equal or unequal plant spacing. The purpose of this utility model is to provide a seed-reversing device, a seed metering device with secondary discharge, and a double-compartment air-suction precision seeder.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A seed-reversing device 10 includes: a seed-reversing housing 106, a seed-reversing drive shaft, a driven shaft, two seed-reversing belts 107, two seed-reversing discs 109, and two seed-reversing small discs 110. The lower end of the seed-reversing housing 106 is provided with a strip-shaped seed-dropping opening. The seed-reversing drive shaft and the driven shaft are rotatably mounted inside the seed-reversing housing 106. The seed-reversing drive shaft and the driven shaft are parallel to each other. Two seed-reversing discs 109 are mounted on the seed-reversing drive shaft, and two seed-reversing small discs 110 are mounted on the driven shaft, both symmetrically arranged on the left and right. The seed-reversing discs 109 and 110 located on the same side are connected by a seed-reversing belt 107. Plate-shaped trays for transferring seeds are provided at equal intervals along the outer surface of the seed-reversing belt 107.

[0011] A seed metering device with secondary discharge, comprising: a seed metering device 9 and the aforementioned seed reversing belt device 10;

[0012] The seed metering device 9 includes: a seed metering drive shaft, an air duct connector 101, a first seed metering housing 102, a seed metering body 103, a second seed metering housing 104, and a suction cup 105. The seed metering body 103 has a left-right symmetrical structure with grooves on both the left and right sides. The first seed metering housing 102 and the second seed metering housing 104 are respectively installed on the left and right sides of the seed metering body 103 and are arranged symmetrically. The seed metering drive shaft is rotatably installed inside the seed metering body 103 and its two ends are rotatably connected to the first seed metering housing 102 and the second seed metering housing 104, respectively.

[0013] The bottom of the seed-reversing belt housing 106 is connected to the bottom of the seed metering device body 103, and the two seed-discharging ports of the seed metering device 9 are connected to the upper end of the seed-reversing belt housing 106.

[0014] The first seed metering device housing 102 and the groove on one side of the seed metering device body 103 together form a first seed suction cavity; the second seed metering device housing 104 and the groove on the other side of the seed metering device body 103 together form a second seed suction cavity.

[0015] Two suction cups 105 are located in the first seed suction chamber and the second seed suction chamber, respectively; both suction cups 105 are mounted on the seed metering device drive shaft, and each suction cup 105 has multiple seed suction holes arranged at equal angles on the side away from the seed metering device body 103.

[0016] The top of the seed metering device body 103 is equipped with an air duct connector 101; the air duct connector 101 is connected to the first seed suction chamber and the second seed suction chamber.

[0017] A dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds includes: a crossbeam 17, a front frame 18, a connecting rod 19, and a rear frame 20. The front ends of the crossbeam 17 and the connecting rod 19 are connected, the front frame 18 is mounted on the crossbeam 17, and the rear frame 20 is mounted on the rear end of the connecting rod 19.

[0018] It also includes: a fertilizer box 4, a seed box 5, a ground wheel 6, a furrow opener 7, a press wheel 8, and the aforementioned secondary discharge seed metering device. The fertilizer box 4 is installed on the front frame 18. Two furrow openers 7 are installed at the bottom of the crossbeam 17, and both furrow openers 7 are connected to the fertilizer box 4 through a fertilizer pipe 21; both furrow openers 7 are used for furrow opening. Two seed metering devices 9 are installed at the bottom of the rear frame 20. A seed reversing belt device 10 is installed at the bottom of each seed metering device 9. A seed box 5 is provided above each seed metering device 9. The first seed metering device housing 102 and the second seed metering device housing 104 are both equipped with seed boxes 5 that communicate with the seed boxes 5. Seed inlet; the two seed outlets of each seed box 5 are connected to the two seed inlets of the seed metering device 9 respectively; the seed reversing belt device 10 is connected to the two seed outlets at the bottom of the seed metering device 9, and the seed reversing belt device 10 is used to send the seeds from the two seed outlets into the ditch; two ground wheels 6 for walking on the ground are installed on the front frame 18, and two press wheels 8 are installed on the rear frame 20; when the seed outlets of the two seed metering devices 9 discharge seeds at the same time, the two seeds fall onto the plate-shaped trays of the two seed reversing belts 107 respectively, and the two seed reversing belts 107 run synchronously, transferring the seeds to the strip-shaped seed drop outlets and falling into the ditch respectively;

[0019] It also includes: a sprocket drive mechanism 15, and the ground wheel 6, fertilizer box 4, seed metering device 9 and seed reversing belt device 10 are driven by the sprocket drive mechanism 15 to achieve synchronous operation.

[0020] The aforementioned dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds further includes: a diesel engine 1, a fan 2, and an air duct 13. The diesel engine 1 and the fan 2 are connected by a drive and are both mounted on the front frame 18. The air duct joints 101 of the two seed metering devices 9 are connected to the fan 2 through the air duct 13. The fan 2 is used to realize negative pressure suction of seeds in the seed metering device 9.

[0021] The aforementioned dual-compartment air-suction precision seeder, suitable for wide and narrow row dense planting with multiple seeds, has a hexagonal cross-section for both the seed-reversing belt drive shaft and the driven rotating shaft.

[0022] The aforementioned dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds includes a sprocket drive mechanism 15 comprising: a seed metering drive sprocket 111 and a seed reversing belt drive sprocket 112. The seed metering drive sprocket 111 is mounted on the end of the seed metering drive shaft; the seed reversing belt drive sprocket 112 is mounted on the end of the seed reversing belt drive shaft; the seed metering drive sprocket 111 and the seed reversing belt drive sprocket 112 are located on the same side of the seed reversing belt device 10 and are connected by chain drive.

[0023] The aforementioned dual-chamber air-suction precision seeder, suitable for wide and narrow row dense planting with multiple seeds, has a connecting rod 19 that is a parallelogram connecting rod mechanism.

[0024] The aforementioned double-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds further includes: a plunger pump 3, a fertilizer loading frame 11, an oil pipe 14, and an oil cylinder 16. The fertilizer loading frame 11 is rotatably mounted on one side of the fertilizer tank 4. One end of the oil cylinder 16 is rotatably connected to the front frame 18, and the other end of the oil cylinder 16 is rotatably connected to the shaft of the fertilizer loading frame 11. The oil cylinder 16 is used to drive the fertilizer loading frame 11 to rotate, thereby realizing the function of loading fertilizer into the fertilizer tank 4. The plunger pump 3 is driven by the output end of the diesel engine 1. The plunger pump 3 and the oil cylinder 16 are connected through the oil pipe 14, and the plunger pump 3 is used to drive the oil cylinder 16 to run.

[0025] The aforementioned dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds also includes: a leaf spring 12, wherein each furrow opener 7 and the crossbeam 17 are connected by a leaf spring 12.

[0026] The aforementioned double-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds includes a sprocket drive mechanism 15 further comprising: a first sprocket mounted on the ground wheel 6, a second sprocket mounted on the bottom of the fertilizer box 4, and a third sprocket mounted on the front frame 18; the first sprocket and the third sprocket are connected by chain drive; the third sprocket and the second sprocket are connected by chain drive; the second sprocket and the seed metering drive sprocket 111 are connected by chain drive, and the movement of the ground wheel 6 drives the fertilizer box 4, the seed metering device 9, and the seed reversing belt device 10 to operate synchronously.

[0027] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:

[0028] (1) This utility model uses a separately set diesel engine to drive the fan instead of the power output shaft of the tractor, which can ensure the stability of the fan operation and thus ensure the stability of the seed metering device operation, that is, the stable adsorption force of the suction hole of the suction cup on the seeds.

[0029] (2) This utility model uses a fertilizer rack to realize the fertilizer loading function of the fertilizer box, replacing manual labor and reducing the difficulty of fertilizer loading. The fertilizer rack is driven by a hydraulic cylinder to ensure stable fertilizer loading.

[0030] (3) This utility model can realize the planting of corn, soybeans and various miscellaneous grains. It can be planted in single, double and multiple plants, as well as in planting modes with equal and unequal plant spacing, so that the crops are resistant to lodging and have good ventilation and light transmission, which greatly improves the photosynthesis of the crops. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds.

[0032] Figure 2 This is a front view of a dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds according to this utility model.

[0033] Figure 3 This is a left view of a dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds, according to this utility model.

[0034] Figure 4 This is a top view of a dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds according to this utility model.

[0035] Figure 5 This is a schematic diagram of the fertilizer rack structure of a double-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds.

[0036] Figure 6 This is a schematic diagram of the connecting rod structure of a dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds.

[0037] Figure 7 This is an exploded view of the seed metering device and seed reversing belt device of a double-chamber air-suction precision seeder suitable for wide and narrow row dense planting and multi-seed planting according to this utility model.

[0038] In the attached diagram: 1. Diesel engine; 2. Fan; 3. Plunger pump; 4. Fertilizer box; 5. Seed box; 6. Ground wheel; 7. Furrow opener; 8. Press wheel; 9. Seed metering device; 10. Seed reversing belt device; 11. Fertilizer rack; 12. Leaf spring; 13. Air duct; 14. Oil pipe; 15. Sprocket drive mechanism; 16. Oil cylinder; 17. Crossbeam; 18. Front frame; 19. Connecting rod; 20. Rear frame; 21. Fertilizer pipe; 101. Air duct connector; 102. First seed metering device housing; 103. Seed metering device body; 104. Second seed metering device housing; 105. Suction cup; 106. Seed reversing belt housing; 107. Seed reversing belt; 109. Seed reversing belt disc; 110. Seed reversing belt small disc; 111. Seed metering device drive sprocket; 112. Seed reversing belt drive sprocket. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0040] Please refer to Figures 1 to 7 As shown, a dual-compartment air-suction precision seeder suitable for wide and narrow row dense planting of multiple seeds is shown, which includes: a crossbeam 17, a front frame 18, a connecting rod 19 and a rear frame 20. The front ends of the crossbeam 17 and the connecting rod 19 are connected, the front frame 18 is mounted on the crossbeam 17, and the rear frame 20 is mounted on the rear end of the connecting rod 19.

[0041] It also includes: fertilizer box 4, seed box 5, ground wheels 6, furrow opener 7, press wheel 8, seed metering device 9, and seed reversing belt device 10. Fertilizer box 4 is installed on the front frame 18. Two furrow openers 7 are installed at the bottom of the crossbeam 17. Both furrow openers 7 are connected to fertilizer box 4 through fertilizer pipe 21. Both furrow openers 7 are used for furrow opening. Two seed metering devices 9 are installed at the bottom of the rear frame 20. Each seed metering device 9 has a seed reversing belt device 10 installed at its bottom. A seed box 5 is provided above each seed metering device 9. The two seed outlets of each seed box 5 are connected to the two seed inlets of the seed metering device 9 respectively. The seed reversing belt device 10 is connected to the two seed outlets at the bottom of the seed metering device 9. The seed reversing belt device 10 is used to send the seeds from the two seed outlets into the furrow. Two ground wheels 6 for walking on the ground are installed on the front frame 18, and two press wheels 8 are installed on the rear frame 20.

[0042] It also includes: a sprocket drive mechanism 15, and the ground wheel 6, fertilizer box 4, seed metering device 9 and seed reversing belt device 10 are driven by the sprocket drive mechanism 15 to achieve synchronous operation.

[0043] Furthermore, in a preferred embodiment, the seed metering device 9 is a pneumatic suction seed metering device that simultaneously sucks up and dispenses seeds from both sides; the seed metering device 9 includes: a seed metering drive shaft, an air duct connector 101, a first seed metering housing 102, a seed metering body 103, a second seed metering housing 104, and a suction cup 105. The seed metering body 103 has a left-right symmetrical structure with grooves on both the left and right sides; the first seed metering housing 102 and the second seed metering housing 104 are respectively installed on the left and right sides of the seed metering body 103. The seed metering device 9 is symmetrically arranged on both sides; the seed metering device drive shaft is rotatably installed inside the seed metering device body 103 and its two ends are rotatably connected to the first seed metering device housing 102 and the second seed metering device housing 104 respectively; the seed metering device 9 adopts a symmetrical structure on both sides to achieve simultaneous adsorption and seeding to the seed-reversing belt device 10, thus realizing synchronous seed adsorption and seeding, solving the problem of difficulty in planting double or multiple seeds. Based on the synchronous transmission structure on both sides of the seed-reversing belt device 10, it ensures that seeds on both sides fall into the furrow at the same time.

[0044] The first seed metering device housing 102 and the groove on one side of the seed metering device body 103 together form a first seed suction cavity; the second seed metering device housing 104 and the groove on the other side of the seed metering device body 103 together form a second seed suction cavity.

[0045] Two suction cups 105 are located in the first seed suction chamber and the second seed suction chamber respectively and are symmetrically arranged on the left and right. Both suction cups 105 are mounted on the seed metering device drive shaft. Each suction cup 105 has multiple seed suction holes arranged at equal angles on the side away from the seed metering device body 103. The diameter of the seed suction holes is smaller than the minimum outer diameter of the seed.

[0046] The top of the seed metering device body 103 is equipped with an air duct connector 101; the air duct connector 101 is connected to the first seed suction chamber and the second seed suction chamber;

[0047] The structure of the groove and suction cup 105 of each seed metering device body 103 is set as a traditional air suction seed metering device structure. This utility model combines two symmetrical air suction seed metering devices together and realizes the structure of simultaneous seed suction and simultaneous seed metering. The bottom adopts a seed inverting belt device 10 instead of the commonly used seed guide tube to ensure that the seeds on both sides can fall into the groove at the same time.

[0048] Both the first seed metering device housing 102 and the second seed metering device housing 104 are provided with seed inlets that communicate with the seed box 5.

[0049] Furthermore, in a preferred embodiment, it further includes: a diesel engine 1, a fan 2, and an air duct 13. The diesel engine 1 and the fan 2 are connected by a drive and are both mounted on the front frame 18. The air duct joints 101 of the two seed metering devices 9 are connected to the fan 2 through the air duct 13. The fan 2 is used to realize negative pressure suction of seeds in the seed metering device 9. When the fan 2 is in operation, the seeds entering through the seed inlets of the first seed metering housing 102 and the second seed metering housing 104 are respectively adsorbed on the seed suction holes of the two suction cups 105. When the two suction cups 105 rotate synchronously to the seed discharge port of the seed metering device 9, the suction force of the fan 2 on the seeds disappears. The seeds on the two suction cups 105 fall synchronously into the seed rewinding belt device 10.

[0050] Furthermore, in a preferred embodiment, when the two suction cups 105 are staggered rather than symmetrically arranged, the seeds on both sides can enter the seed-returning belt device 10 in a staggered manner, and then the seed-returning belt device 10 will cause the seeds to fall into the groove in a staggered manner.

[0051] Furthermore, in a preferred embodiment, the seed-reversing device 10 includes: a seed-reversing housing 106, a seed-reversing drive shaft, a driven rotating shaft, two seed-reversing belts 107, two seed-reversing discs 109, and two seed-reversing small discs 110. The seed-reversing housing 106 is connected to the bottom of the seed metering device body 103, and the two seed-discharging ports of the seed metering device 9 are connected to the upper end of the seed-reversing housing 106. The lower end of the seed-reversing housing 106 is provided with a strip-shaped seed-dropping port. The seed-reversing drive shaft and the driven rotating shaft are rotatably mounted inside the seed-reversing housing 106. The seed-reversing drive shaft and the driven rotating shaft are parallel to each other, and two seed-reversing discs symmetrically arranged on the seed-reversing drive shaft are mounted on the seed-reversing drive shaft. The seed tray 109 has two symmetrically arranged seed-reversing trays 110 mounted on the driven shaft. The seed-reversing tray 109 and seed-reversing trays 110 on the same side are connected by a seed-reversing tray 107. Plate-shaped trays for transferring seeds are provided at equal intervals along the outer surface of the seed-reversing tray 107. When the seed discharge ports of the two seed metering devices 9 discharge seeds at the same time, the two seeds fall onto the plate-shaped trays of the two seed-reversing trays 107 respectively. The two seed-reversing trays 107 operate synchronously, transferring the seeds to the strip-shaped seed drop port and into the trench. The synchronous operation of the two seed-reversing trays 107 can synchronously send the seeds that fall into the seed-reversing tray device 10 from both sides into the trench. The reason why this utility model uses a seed-reversing device 10 instead of a seed guide tube is that, after the seeds discharged from the seed metering device enter the seed guide tube, most of them do not slide directly out along the seed guide tube. Instead, they rotate along the inner wall of the seed guide tube under the action of centrifugal force. If double or multiple seeds are used for seed metering, the seeds on both sides will rotate inside the seed guide tube, which will cause them to fall into the furrow at the same time, making it difficult to ensure the planting spacing and planting effect.

[0052] Furthermore, in a preferred embodiment, when the two inverted seeding strips 107 are symmetrically arranged, simultaneous seeding in the furrow can be achieved; when the two inverted seeding strips 107 are staggered, staggered seeding in the furrow can be achieved.

[0053] Furthermore, in a preferred embodiment, both the drive shaft and the driven shaft have regular hexagonal cross sections.

[0054] Furthermore, in a preferred embodiment, the sprocket drive mechanism 15 includes: a seed metering drive sprocket 111 and a seed reversing belt drive sprocket 112. The seed metering drive sprocket 111 is installed at the end of the seed metering drive shaft; the seed reversing belt drive sprocket 112 is installed at the end of the seed reversing belt drive shaft; the seed metering drive sprocket 111 and the seed reversing belt drive sprocket 112 are located on the same side of the seed reversing belt device 10 and are connected by chain drive.

[0055] Furthermore, in a preferred embodiment, link 19 is a parallelogram linkage mechanism.

[0056] Furthermore, in a preferred embodiment, it further includes: a plunger pump 3, a fertilizer loading frame 11, an oil pipe 14, and a hydraulic cylinder 16. The fertilizer loading frame 11 is rotatably mounted on one side of the fertilizer tank 4. One end of the hydraulic cylinder 16 is rotatably connected to the front frame 18, and the other end of the hydraulic cylinder 16 is rotatably connected to the shaft of the fertilizer loading frame 11. The hydraulic cylinder 16 is used to drive the fertilizer loading frame 11 to rotate, thereby realizing the function of loading fertilizer into the fertilizer tank 4. The plunger pump 3 is driven to the output end of the diesel engine 1. The plunger pump 3 and the hydraulic cylinder 16 are connected through the oil pipe 14, and the plunger pump 3 is used to drive the hydraulic cylinder 16 to run.

[0057] Furthermore, in a preferred embodiment, it also includes a leaf spring 12, wherein each trencher 7 and the crossbeam 17 are connected by a leaf spring 12, which can effectively reduce the impact of the ground on the crossbeam.

[0058] Furthermore, in a preferred embodiment, the sprocket drive mechanism 15 further includes: a first sprocket mounted on the ground wheel 6, a second sprocket mounted on the bottom of the fertilizer box 4, and a third sprocket mounted on the front frame 18; the first sprocket and the third sprocket are connected by chain drive; the third sprocket and the second sprocket are connected by chain drive; the second sprocket and the seed metering device drive sprocket 111 are connected by chain drive, and the movement of the ground wheel 6 drives the fertilizer box 4, the seed metering device 9, and the seed reversing belt device 10 to operate synchronously.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0060] Based on the above, this utility model also has the following embodiments:

[0061] In a further embodiment of this invention, a separate diesel engine 1 drives the fan 2 instead of the power take-off shaft of the tractor. This ensures the stability of the fan 2's operation, thereby guaranteeing the stability of the seed metering device 9, specifically the stable adsorption force of the suction cup 105 on the seeds. With existing tractor power take-off shafts, the vehicle speed affects the shaft's rotational speed during travel, thus impacting the fan 2's operational stability and causing seeds already adsorbed in the suction cup to fall out.

[0062] In a further embodiment of this utility model, a fertilizer rack 11 is used to realize the fertilizer loading function of the fertilizer box 4, replacing manual labor and reducing the difficulty of fertilizer loading. A hydraulic cylinder 16 is used to drive the fertilizer rack 11 to move, ensuring stable fertilizer loading.

[0063] In a further embodiment of this utility model, the sprocket transmission mechanism 15 adopts a structure with two sets on both sides to achieve stable operation of the two seed metering devices 9. Based on this utility model, the number of seed metering devices 9 and seed reversing belt devices 10 can be increased. By opening or closing the seed drop opening at the bottom of the seed box 5, single, double, and multiple planting can be achieved.

[0064] In a further embodiment of this utility model, based on this utility model, by changing the two suction cups 105 inside the seed metering device 9 to a staggered mode, and the two seed-reversing belts 107 of the seed-reversing belt device 10 to a staggered mode, it is possible to achieve that the seeds on both sides fall into the ditch in a staggered manner, thus avoiding the two seeds falling into the ditch at the same time.

[0065] In a further embodiment of this utility model, corn, soybeans and various miscellaneous grains can be planted. They can be planted as single plants, double plants, multiple plants, or in planting patterns with equal or unequal spacing, which makes the crops resistant to lodging and greatly improves the photosynthesis of the crops by ensuring good ventilation and light penetration.

[0066] In a further embodiment of this utility model, the front frame 18 is mounted on the crossbeam 17, and the crossbeam 17 is connected to the rear frame 20 through a connecting rod 19. The connecting rod 19 adopts a parallelogram linkage mechanism, which ensures the strength of the connection and also ensures that the stability of the front frame 18 is not affected during the operation of the two side press wheels 8 when the rear frame 20 is pulled. The crossbeam 17 needs to be connected to the tractor, and the tractor pulls the seeder to achieve the function of walking.

[0067] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seed-reversing device, characterized in that, The seed-reversing device (10) includes: a seed-reversing housing (106), a seed-reversing drive shaft, a driven shaft, two seed-reversing belts (107), two seed-reversing discs (109), and two seed-reversing small discs (110). The lower end of the seed-reversing housing (106) is provided with a strip-shaped seed-dropping opening. The seed-reversing drive shaft and the driven shaft are rotatably installed inside the seed-reversing housing (106). The seed-reversing drive shaft and the driven shaft are parallel to each other. Two seed-reversing discs (109) are installed on the seed-reversing drive shaft, which is symmetrically arranged on the left and right. Two seed-reversing small discs (110) are installed on the driven shaft, which is symmetrically arranged on the left and right. The seed-reversing discs (109) and seed-reversing small discs (110) located on the same side are connected by a seed-reversing belt (107). Plate-shaped trays for transferring seeds are provided at equal intervals along the outer surface of the seed-reversing belt (107).

2. A seed metering device with secondary discharge, characterized in that, include: Seeding device (9) and seed reversing device (10) as described in claim 1; The seed metering device (9) includes: a seed metering drive shaft, an air duct connector (101), a first seed metering housing (102), a seed metering body (103), a second seed metering housing (104), and a suction cup (105). The seed metering body (103) has a left-right symmetrical structure with grooves on both the left and right sides. The first seed metering housing (102) and the second seed metering housing (104) are respectively installed on the left and right sides of the seed metering body (103) and are arranged symmetrically. The seed metering drive shaft is rotatably installed inside the seed metering body (103) and its two ends are rotatably connected to the first seed metering housing (102) and the second seed metering housing (104) respectively. The bottom of the seed-reversing belt housing (106) and the seed metering device body (103) are connected, and the two seed discharge ports of the seed metering device (9) are connected to the upper end of the seed-reversing belt housing (106); The first seed metering device housing (102) and the seed metering device body (103) form a first seed suction cavity by their respective side grooves; the second seed metering device housing (104) and the seed metering device body (103) form a second seed suction cavity by their respective side grooves. Two suction cups (105) are located in the first seed suction chamber and the second seed suction chamber respectively; both suction cups (105) are mounted on the seed metering device drive shaft, and each suction cup (105) has multiple seed suction holes arranged at equal angles on the side away from the seed metering device body (103); The top of the seed metering device body (103) is equipped with an air duct connector (101); the air duct connector (101) is connected to the first seed suction chamber and the second seed suction chamber.

3. A dual-compartment air-suction precision seeder suitable for wide-narrow row, high-density, multi-seed planting, characterized in that, include: A crossbeam (17), a front frame (18), a connecting rod (19) and a rear frame (20), with the front ends of the crossbeam (17) and the connecting rod (19) connected, and the front frame (18) mounted on the crossbeam (17); The rear frame (20) is mounted at the rear end of the connecting rod (19); It also includes: a fertilizer box (4), a seed box (5), a ground wheel (6), a furrow opener (7), a press wheel (8), and a seed metering device for secondary discharge as described in claim 2. The fertilizer box (4) is installed on the front frame (18), and two furrow openers (7) are installed at the bottom of the crossbeam (17). Both furrow openers (7) are connected to the fertilizer box (4) through a fertilizer pipe (21). Both furrow openers (7) are used for furrowing. Two seed metering devices (9) are installed at the bottom of the rear frame (20). Each seed metering device (9) has a seed-reversing belt device (10) installed at its bottom. A seed box (5) is provided above each seed metering device (9). There are a first seed metering device housing (102) and a second seed metering device housing (104). Each of the two seed boxes (5) is equipped with a seed inlet that is connected to the seed box (5); the two seed outlets of each seed box (5) are connected to the two seed inlets of the seed metering device (9); the seed reversing belt device (10) is connected to the two seed outlets at the bottom of the seed metering device (9), and the seed reversing belt device (10) is used to send the seeds from the two seed outlets into the ditch; two ground wheels (6) for walking on the ground are installed on the front frame (18), and two press wheels (8) are installed on the rear frame (20); when the seed outlets of the two seed metering devices (9) discharge seeds at the same time, the two seeds fall onto the plate trays of the two seed reversing belts (107) respectively, and the two seed reversing belts (107) run synchronously, transferring the seeds to the strip seed drop outlets and falling into the ditch respectively; It also includes: a sprocket drive mechanism (15), a ground wheel (6), a fertilizer box (4), a seed metering device (9), and a seed reversing belt device (10) which are driven by the sprocket drive mechanism (15) to achieve synchronous operation.

4. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, Also includes: The diesel engine (1), the fan (2) and the air duct (13) are connected by a drive and are both installed on the front frame (18); the air duct joints (101) of the two seed metering devices (9) are connected to the fan (2) through the air duct (13); the fan (2) is used to realize the negative pressure suction of seeds in the seed metering device (9).

5. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, Both the drive shaft and the driven shaft have regular hexagonal cross sections.

6. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, The sprocket drive mechanism (15) includes: a seed metering drive sprocket (111) and a seed reversing belt drive sprocket (112). The seed metering drive sprocket (111) is installed at the end of the seed metering drive shaft; the seed reversing belt drive sprocket (112) is installed at the end of the seed reversing belt drive shaft; the seed metering drive sprocket (111) and the seed reversing belt drive sprocket (112) are located on the same side of the seed reversing belt device (10) and are connected by chain drive.

7. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, Link (19) is a parallelogram linkage mechanism.

8. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, Also includes: The components include a plunger pump (3), a fertilizer rack (11), an oil pipe (14), and a cylinder (16). The fertilizer rack (11) is rotatably mounted on one side of the fertilizer tank (4). One end of the cylinder (16) is rotatably connected to the front frame (18), and the other end of the cylinder (16) is rotatably connected to the shaft of the fertilizer rack (11). The cylinder (16) is used to drive the fertilizer rack (11) to rotate, thereby realizing the function of feeding fertilizer into the fertilizer tank (4). The plunger pump (3) is connected to the output end of the diesel engine (1). The plunger pump (3) and the cylinder (16) are connected through the oil pipe (14). The plunger pump (3) is used to drive the cylinder (16) to run.

9. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds as described in claim 3, characterized in that, Also includes: A leaf spring (12) is used to connect each trencher (7) and crossbeam (17).

10. The dual-chamber air-suction precision seeder suitable for wide and narrow row dense planting with multiple seeds according to claim 6, characterized in that, The sprocket drive mechanism (15) also includes: a first sprocket mounted on the ground wheel (6), a second sprocket mounted on the bottom of the fertilizer box (4), and a third sprocket mounted on the front frame (18); the first sprocket and the third sprocket are connected by chain drive; the third sprocket and the second sprocket are connected by chain drive; the second sprocket and the seed metering device drive sprocket (111) are connected by chain drive, and the fertilizer box (4), the seed metering device (9) and the seed reversing belt device (10) are driven to run synchronously by the movement of the ground wheel (6).

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