Towed precision drill

Abstract

This application relates to the technical field of agricultural machinery, and in particular to a traction-type precision row seeder, which includes a traction frame, a frame, a seed box, a sowing assembly, wheels, and a platform. The traction frame is located at the front of the platform, the seed box is located at the top of the platform, the frame and wheels are located on the left and right sides of the platform, and the sowing mechanism is located below the seed box. The seed box consists of two storage chambers, front and rear, with several guide blocks arranged in an array inside each chamber. The tops of the guide blocks are inclined. This application, by setting up staggered storage chambers, combined with the inclined guide blocks and guide rods with diamond-shaped plates inside the storage chambers, continuously guides the seeds, effectively preventing seed blockage at the discharge port and ensuring smooth seed discharge. Simultaneously, an electric hydraulic rod drives an adjustment plate at the bottom of the storage chamber to flexibly control the opening state of the control port, enabling switching between single-species sowing and mixed sowing of multiple crops, adapting to the sowing needs of different crops, and possessing strong versatility.

Description

Technical Field

[0001] This application relates to the technical field of agricultural machinery, and in particular to a tractor-mounted precision strip seeder. Background Technology

[0002] Currently, sowing has always been an important process in agricultural production. Traditional farming relies entirely on manual sowing, which not only consumes a lot of time and labor but also has low work efficiency. With the improvement of agricultural mechanization, various agricultural machines are widely used. The application of seeders can greatly reduce the labor intensity of farmers and save sowing time. Especially for crops with strict sowing time requirements, precision row seeders have become the core agricultural equipment in the planting process of grain crops and cash crops. Their sowing uniformity, material flow, and adaptability to working conditions directly affect the quality of seedling emergence in the field and the yield of crops in the later stage.

[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: the sowing equipment can only sow a single type of seed, failing to meet the planting needs of flexible switching between single and mixed sowing in the field. The equipment has poor versatility, and the internal structure of the storage bin is simple, making it easy for seeds to accumulate, arch, or become blocked at the discharge position, leading to material shortages and missed sowing, which seriously affects the continuity of sowing. Furthermore, the traditional seed metering structure relies solely on the weight of the seed metering wheel for feeding, causing seeds to easily stick together and remain inside the seed metering cavity, resulting in unsmooth seed delivery. It is also difficult to accurately match the seed dispensing amount according to the machine's travel speed, easily leading to uneven sowing density. Summary of the Invention

[0004] To address the problems mentioned in the background section, this application provides a traction-type precision strip seeder.

[0005] This application provides a traction-type precision row seeder, employing the following technical solution: It includes a traction frame, a machine frame, a seed box, a sowing assembly, wheels, and a platform. The traction frame is positioned at the front of the platform, the seed box is positioned at the upper end of the platform, the machine frame and wheels are positioned on the left and right sides of the platform, and the sowing mechanism is positioned below the seed box. The seed box consists of two storage chambers, front and rear, each containing an array of guide blocks with their tops angled. Two discharge ports are located between adjacent guide blocks on the bottom wall of the seed box. The sowing mechanism includes a seed discharge mechanism. The seed metering device is fixedly connected to the bottom wall of the seed box. An air blowing pipe is connected through the front end of the bottom of the seed metering device. An adjustment port communicating with the discharge port is opened on the top of the seed metering device. Adjustment plates are slidably connected to the front and rear sides of the top of the seed metering device inside the adjustment port. A seed guide tube is connected through the bottom of the seed metering device. A support frame is fixedly connected between two adjacent seed guide tubes. A furrowing disc is rotatably connected to both sides of the bottom of the support frame. The furrowing disc is set at an inclined angle. The seed guide tube extends to the position between the furrowing discs. A seed pressing plate is fixedly connected to the bottom of the support frame between the furrowing discs.

[0006] Optionally, the outer wall of the seed box is fixedly connected to the top of the walkway by a connecting plate, the top of the seed box is fitted with a dust cover, the bottom of the seed box is set at an inclined angle, and the storage chambers are staggered.

[0007] Optionally, a guide rod is rotatably connected inside the storage chamber above the discharge port. A diamond-shaped plate is provided on the outer surface of the guide rod between the guide blocks. The left end of the guide rod is fixedly connected to the output shaft of the drive motor on the outer wall of the docking plate.

[0008] Optionally, the seed metering device has a seed metering wheel rotatably connected to the rear end below the discharge port. The seed metering wheel has an insertion hole at its center, and a power shaft is inserted into the insertion hole. A sprocket is fixedly connected to the right end of the power shaft away from the side wall of the docking plate. The sprockets are engaged with each other through a transmission chain. The side wall of the docking plate is engaged with the transmission chain by a speed-regulating motor.

[0009] Optionally, the seed metering device has an installation groove at the rear end of the seed metering wheel, and a maintenance cover is rotatably connected to the rear end of the seed metering device at the installation groove. A partition is fixedly connected to the center of the seed metering device at the outer surface of the seed metering wheel, and the partition extends to the bottom of the seed metering device. The maintenance cover has buckles at both ends, and the side wall of the seed metering device has claws that engage with the buckles. The side wall of the maintenance cover has a top block that forms a sliding connection with the end of the seed metering wheel.

[0010] Optionally, a guide ring is fixedly connected to the inner wall of the seed metering device in front of the seed metering wheel, the end of the air blowing pipe is embedded in the guide ring, the opening of the air blowing pipe is set at an inclined angle towards the bottom of the seed metering wheel, and an air pump connected to the air blowing pipe is provided on the inner wall of the docking plate.

[0011] Optionally, the side wall of the adjusting plate engages with the regulating port via a material blocking plate, and a support frame is fixedly connected to the bottom wall of the seed box inside the adjusting plate. The support frame passes through the adjusting plate, and an electric hydraulic rod is fixedly connected to the side wall of the adjusting plate away from the support frame. The bottom wall of the seed box is connected to the electric hydraulic rod via a mounting bracket.

[0012] Optionally, the rear end of the support frame is rotatably connected to a pressing wheel located behind the trenching disc, and a fixed crossbeam is inserted between the front ends of the walkway. The rear end of the traction frame is connected to the fixed crossbeam via a connecting buckle. Several limiting frames are arrayed and sleeved on the outer surface of the fixed crossbeam. The front end of the support frame and the rear side wall of the limiting frame form a rotatable connection. A buffer frame is rotatably connected to the rear side wall of the limiting frame located below the support frame, and a corrugated disc is rotatably connected to the bottom of the buffer frame.

[0013] Optionally, a pre-tightened long bolt is rotatably connected to the front side wall of the bearing frame, and a buffer groove is opened at the top of the buffer frame to engage with the pre-tightened long bolt. A support spring is sleeved on the outer surface of the pre-tightened long bolt behind the buffer groove, and a nut is engaged at the end of the pre-tightened long bolt in front of the buffer groove. A lifting beam is slidably connected between the inner walls of the mating plates. A fixing buckle is sleeved on the outer surface of the lifting beam above the bearing frame. An insert rod is provided at the rear end of the fixing buckle. A support rod is slidably connected to the outer surface of the insert rod. A moving groove is opened at the top of the support rod to form a slidable connection with the insert rod. The bottom end of the support rod is rotatably connected to the side wall of the bearing frame. A fixing spring is sleeved on the outer surface of the support rod below the fixing buckle. A stop is provided on the side wall of the fixing buckle above the fixing spring, and the support rod is slidably connected inside the stop.

[0014] Optionally, adjusting bolts are fixedly connected to both ends of the lifting beam away from the docking plate. Slide rails that form a sliding connection with both ends of the lifting beam are provided inside the frame and on the side wall of the docking plate. Adjusting screw sleeves are engaged on the outer surface of the adjusting bolts. The outer wall of the docking plate is rotatably connected to the outer surface of the adjusting screw sleeves by setting a fixing plate. All electrical components in the device are equipped with control modules, and the electrical components are driven and controlled by an external controller.

[0015] In summary, this application includes the following beneficial technical effects: This invention features staggered storage chambers with inclined guide blocks and diamond-shaped guide rods inside, providing continuous seed distribution and effectively preventing seed blockage at the discharge port, ensuring smooth seed flow. Simultaneously, an electric hydraulic rod drives an adjustment plate at the bottom of the storage chamber, flexibly controlling the opening of the control port to switch between single-species sowing and mixed sowing, adapting to the sowing needs of different crops and exhibiting strong versatility.

[0016] This invention uses a seed metering wheel to quantitatively meter seeds, and coordinates with a speed-regulating motor and sprocket transmission system to achieve synchronous control with the walking speed, ensuring uniform seeding. An air pump blows air downwards through an air blower to precisely blow seeds into the seed guide tube, preventing seeds from lingering in the seed meterer and achieving accurate seed delivery. At the same time, a maintenance cover with a buckle is set on the rear of the seed meterer to improve the convenience of replacing, maintaining, and cleaning the seed metering wheel.

[0017] This invention uses a corrugated disc at the bottom of the buffer frame to pre-cut the soil before furrowing, clearing the working channel for the subsequent furrow opener. At the same time, the tilt angle of the support frame can be adjusted by the adjustable lifting beam, thereby controlling the soil penetration depth of the furrowing disc to adapt to the sowing depth requirements of different crops. The seed guide tube extends between the two discs to accurately guide the seeds into the center of the furrow, ensuring that the seeds are centered and at a consistent depth. The seed pressing plate gently presses the seeds into the soil of the furrow, making close contact between the seeds and the soil and reducing seed scavenging. The rear pressing wheel covers and compacts the soil in the furrow, effectively improving the germination rate and uniformity.

[0018] This invention adopts a modular design for the whole machine, with the seed box, seed metering device, and sowing component all being independent units, which facilitates disassembly, maintenance, and replacement. At the same time, the sowing component can flexibly adjust the sowing spacing by adjusting the installation position of the limiting frame and the fixing buckle, adapting to the sowing needs of different crops. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the docking plate in an embodiment of this application; Figure 3 This is a schematic diagram of the lifting beam in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the storage chamber in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the adjustment plate in an embodiment of this application; Figure 6 This is a schematic diagram of the power shaft structure in an embodiment of this application; Figure 7 This is a schematic diagram of the air blowing pipe in an embodiment of this application; Figure 8 This is a schematic diagram of the control port structure in an embodiment of this application; Figure 9 This is a schematic diagram of the support rod structure in an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the buffer frame in the embodiment of this application.

[0020] Attached reference numerals: 1. Traction frame; 2. Frame; 3. Seed box; 4. Wheels; 5. Platform; 6. Storage chamber; 7. Guide block; 8. Discharge port; 9. Seed metering device; 10. Air blowing pipe; 11. Control port; 12. Adjustment plate; 13. Seed guide tube; 14. Support frame; 15. Grooving disc; 16. Seed pressing plate; 17. Connecting plate; 18. Dust cover; 19. Guide rod; 20. Diamond plate; 21. Drive motor; 22. Seed metering wheel; 23. Insertion hole; 24. Power shaft; 25. 26. Sprockets; 27. Drive chain; 28. Speed ​​regulating motor; 29. ​​Inspection cover; 30. Partition plate; 31. Guide ring; 32. Air pump; 33. Support frame; 34. Electro-hydraulic rod; 35. Mounting frame; 36. Pressing wheel; 37. Fixed crossbeam; 38. Limiting frame; 39. Buffer frame; 40. Corrugated disc; 41. Pre-tightening long bolt; 42. Support spring; 43. Lifting beam; 44. Fixing buckle; 45. Support rod; 46. Fixing spring; 47. Adjusting bolt; 48. Adjusting sleeve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The following is in conjunction with the appendix Figures 1-10 This application will be described in further detail.

[0023] This application discloses a traction-type precision strip seeder. For example... Figures 1-10 As shown, the machine includes a traction frame 1, a frame 2, a seed box 3, a sowing assembly, wheels 4, and a platform 5. The traction frame 1 is located on the front side of the platform 5 and is used to quickly connect with external traction equipment to enable the machine to move and operate. The seed box 3 is located on the upper part of the platform 5. The frame 2 and wheels 4 are located on the left and right sides of the platform 5. The platform 5 is an integrated load-bearing platform that provides a stable installation position for the structure. The frame 2 plays a role in overall reinforcement and limiting installation to ensure the structural strength of the whole machine. The sowing mechanism is located below the seed box 3 and is used to receive the seeds and complete the operations of seeding, seed guiding, furrowing, sowing, covering and compacting.

[0024] The seed box 3 consists of two storage chambers 6, one at the front and one at the back. Several guide blocks 7 are arranged in an array inside the storage chamber 6. The top of the guide blocks 7 is set at an inclined angle. The bottom wall of the seed box 3 has two discharge ports 8 between two adjacent guide blocks 7. The inclined structure, combined with gravity, guides the seeds to slide towards the discharge ports 8, avoiding seed accumulation and ensuring smooth material discharge. The structure of the double discharge ports 8 increases the material flow area and further improves the uniformity of material discharge.

[0025] The sowing mechanism includes a seed metering device 9, which is fixedly connected to the bottom wall of the seed box 3. An air blowing pipe 10 is connected to the front end of the bottom of the seed metering device 9. An adjustment port 11 is opened on the top of the seed metering device 9 and is connected to the discharge port 8. Adjustment plates 12 are slidably connected to the front and rear sides of the top of the seed metering device 9 inside the adjustment port 11. By controlling the opening and closing of the adjustment plates 12, the discharge port 8 at the bottom of a single storage chamber 6 can be opened individually or the discharge ports 8 at the bottom of two storage chambers 6 can be opened simultaneously, thereby realizing the switching between single-species sowing or mixed sowing operation modes to adapt to the sowing needs of different crops. A seed guide tube 13 is connected to the bottom of the seed metering device 9. The seed guide tube 13 adopts a straight-through material guiding structure to ensure stable seed falling.

[0026] A support frame 14 is fixedly connected between two adjacent seed guide tubes 13. The support frame 14 serves as the main support for the sowing execution component and is used to integrate the functions of pre-cutting, furrowing, pressing, and covering. Furrowing discs 15 are rotatably connected to both sides of the bottom of the support frame 14. The furrowing discs 15 are set at an inclined angle, which facilitates the cutting of regular V-shaped seed furrows on the soil surface. The seed guide tubes 13 extend to the position between the furrowing discs 15, so that the seeds can fall accurately into the center of the seed furrow. A pressing plate 16 is fixedly connected to the bottom of the support frame 14 between the furrowing discs 15. The pressing plate 16 is located directly above the seed furrow. After the seeds fall into the seed furrow, they can be lightly compacted to eliminate gaps under the seeds, so that the seeds are closely attached to the soil and improve water absorption and germination ability.

[0027] The outer wall of the seed box 3 is fixedly connected to the top of the platform 5 by a connecting plate 17. The connecting plate 17 is a vertical mounting plate that provides installation space for the structure. A dust cover 18 is snapped onto the top of the seed box 3. The dust cover 18 can prevent field dust and debris from entering the inside of the seed box 3, ensuring the cleanliness of the seeds. The bottom of the seed box 3 is set at an inclined angle. The inclined bottom wall further assists the seeds to gather towards the discharge port 8, preventing seed residue. The storage chambers 6 are staggered. The staggered layout can reduce mutual interference between seeds, realize independent feeding, and facilitate the completion of single seed sowing and mixed seed sowing operations.

[0028] Inside the storage chamber 6, a guide rod 19 is rotatably connected above the discharge port 8. A diamond-shaped plate 20 is set on the outer surface of the guide rod 19 between the guide blocks 7. The diamond plate 20 rotates synchronously with the guide rod 19. During the rotation, the accumulated seeds are constantly disturbed to further prevent the discharge port 8 from being blocked and to ensure continuous and uniform feeding. The left end of the guide rod 19 is fixedly connected to the output shaft of the drive motor 21 on the outer wall of the docking plate 17.

[0029] The seed metering device 9 has a seed metering wheel 22 rotatably connected to its rear end below the discharge port 8. The seed metering wheel 22 is a quantitative seed metering structure that uses grooves on the wheel surface to achieve equal volume seed collection, ensuring accurate and controllable seeding. The seed metering wheel 22 has a plug-in hole 23 at its center, and a power shaft 24 is plugged into the plug-in hole 23. The plug-in installation structure facilitates the disassembly and replacement of the seed metering wheel 22. The right end of the power shaft 24 is fixedly connected to a sprocket 25 away from the side wall of the docking plate 17. The sprockets 25 are engaged with each other through a transmission chain 26. The side wall of the docking plate 17 is connected to the transmission chain 26 through a speed-regulating motor 27. The speed-regulating motor 27 can adjust the transmission speed and achieve speed linkage with the overall machine travel speed.

[0030] The seed metering device 9 has an installation groove at the rear end of the seed metering wheel 22. A maintenance cover 28 is rotatably connected to the rear end of the seed metering device 9 at the installation groove. A partition 29 is fixedly connected to the center of the seed metering device 9 on the outer surface of the seed metering wheel 22. The partition 29 extends to the bottom of the seed metering device 9. The partition 29 prevents seeds from moving around and improves seed metering stability. The maintenance cover 28 has buckles at both ends. The side wall of the seed metering device 9 has claws that engage with the buckles. The buckle-type opening and closing structure makes it easy to quickly open the maintenance cover 28, which is convenient for staff to clean or replace seed metering wheels 22 of different specifications. The side wall of the maintenance cover 28 has a top block that is slidably connected to the end of the seed metering wheel 22. The top block axially limits the seed metering wheel 22, reduces operating vibration, and improves rotational stability.

[0031] A guide ring 30 is fixedly connected to the inner wall of the seed metering device 9 in front of the seed metering wheel 22. The end of the air blowing pipe 10 is embedded in the guide ring 30. The opening of the air blowing pipe 10 is set at an inclined angle facing downwards from the seed metering wheel 22. An air pump 31 connected to the air blowing pipe 10 is provided on the inner wall of the docking plate 17. The air pump 31 generates high-pressure airflow and blows air in a directional and inclined manner through the air blowing pipe 10. The airflow can quickly blow the seeds carried by the seed metering wheel 22 into the seed guiding tube 13 to prevent the seeds from getting stuck, while speeding up the seed delivery speed and achieving precise seed delivery.

[0032] The side wall of the adjusting plate 12 engages with the regulating port 11 via a material blocking plate. The material blocking plate fits against the inner wall of the regulating port 11, enabling precise control of material feeding and preventing leakage. The bottom wall of the seed box 3 is fixedly connected to a support frame 32 inside the adjusting plate 12. The support frame 32 passes through the adjusting plate 12 and acts as a limit guide for the adjusting plate 12, ensuring smooth sliding without deviation. An electric hydraulic rod 33 is fixedly connected to the side wall of the adjusting plate 12 away from the support frame 32. The bottom wall of the seed box 3 is connected to the electric hydraulic rod 33 via a mounting bracket 34. The electric hydraulic rod 33 can precisely control the sliding distance of the adjusting plate 12, thereby adjusting the opening size and changing the material feeding flow rate.

[0033] The rear end of the support frame 14 is rotatably connected to a press wheel 35 located behind the furrowing disc 15. The press wheel 35 moves with the machine, covering and compacting the furrows to reduce soil voids, lock in soil moisture, prevent seeds from drying out, and improve germination rate. A fixed crossbeam 36 is inserted between the front ends of the walkways 5. The rear end of the traction frame 1 is connected to the fixed crossbeam 36 via a connecting buckle. The fixed crossbeam 36 provides fixed support for the traction frame 1 and the sowing components. Several limiting frames 37 are arrayed and sleeved on the outer surface of the fixed crossbeam 36. The limiting frames 37 can be positioned on the fixed crossbeam. The position of the 36 can be adjusted by sliding, thereby changing the spacing of the sowing components to adapt to the sowing requirements of different crop row spacing. The front end of the support frame 14 is rotatably connected to the rear side wall of the limiting frame 37. The rear side wall of the limiting frame 37 is rotatably connected to the buffer frame 38 below the support frame 14. The bottom of the buffer frame 38 is rotatably connected to the corrugated plate 39. The corrugated plate 39 pre-cuts and opens the soil. During operation, it prioritizes contact with the soil, cuts and breaks up hard soil layers and field straw, and prevents the subsequent ditching disc 15 from getting tangled and blocked. At the same time, it pre-cuts shallow trenches to reduce ditching resistance.

[0034] The front side wall of the support frame 14 is rotatably connected to a pre-tightening long bolt 40. The top of the buffer frame 38 is provided with a buffer groove that engages with the pre-tightening long bolt 40. A support spring 41 is sleeved on the outer surface of the pre-tightening long bolt 40 behind the buffer groove. A nut is engaged at the end of the pre-tightening long bolt 40 in front of the buffer groove. The pre-tightening force of the support spring 41 can be adjusted by rotating the nut, thereby controlling the tilt angle of the buffer frame 38, so that the corrugated plate 39 has buffering capacity and ensures that the corrugated plate 39 always fits in contact with the ground.

[0035] A lifting beam 42 is slidably connected between the inner walls of the docking plate 17. A fixing buckle 43 is sleeved on the outer surface of the lifting beam 42 above the bearing frame 14. An insert rod is provided at the rear end of the fixing buckle 43. A support rod 44 is slidably connected to the outer surface of the insert rod. A moving groove is opened at the top of the support rod 44, which is slidably connected to the insert rod. The bottom end of the support rod 44 is rotatably connected to the side wall of the bearing frame 14. The insert rod limits the support rod 44 to prevent it from slipping. A fixing spring 45 is sleeved on the outer surface of the support rod 44 below the fixing buckle 43. A stop is provided on the side wall of the fixing buckle 43 above the fixing spring 45. The support rod 44 is slidably connected inside the stop. The stop fixes the top of the fixing spring 45 and guides the support rod 44.

[0036] Adjusting bolts 46 are fixedly connected to both ends of the lifting beam 42 at positions away from the docking plate 17. Slide rails are provided inside the frame 2 and on the side wall of the docking plate 17, forming a sliding connection with both ends of the lifting beam 42. The slide rails guide the lifting beam 42. Adjusting sleeves 47 are engaged on the outer surface of the adjusting bolts 46. The outer wall of the docking plate 17 is rotatably connected to the outer surface of the adjusting sleeves 47 by setting a fixing plate. The electrical components in the device are equipped with control modules. The electrical components are driven and controlled by an external controller. Manually rotating the adjusting sleeves 47 moves the adjusting bolts 46, thereby changing the height of the lifting beam 42. In conjunction with the support rod 44 and the fixing spring 45, the tilt angle of the bearing frame 14 is adjusted, ultimately realizing the adjustment of the soil penetration depth of the furrowing disc 15 to adapt to the sowing depth requirements of different crops. The staff can uniformly control the sowing parameters through the external controller, making the adjustment of sowing parameters intuitive and convenient.

[0037] The implementation principle of a traction-type precision strip seeder according to an embodiment of this application is as follows: During use, the seed box 3 consists of two staggered storage chambers 6. After the seeds are poured into the storage chambers 6, they are guided by gravity and converge towards the discharge port 8 under the guidance of the guide block 7. Simultaneously, the drive motor 21 drives the guide rod 19 to rotate, and the guide rod 19 drives the diamond-shaped plate 20 to guide the seeds. According to the sowing requirements, the electric hydraulic rod 33 is adjusted by an external controller. The electric hydraulic rod 33 drives the adjustment plate 12 at the bottom of a single storage chamber 6 or the adjustment plate 12 at the bottom of both storage chambers 6. The adjusting plate 12 is moved away from the control port 11, thereby realizing single and mixed seed sowing. At this time, the seeds fall onto the seed metering wheel 22 through the discharge port 8 and the control port 11. The speed regulating motor 27 drives the sprocket 25 to rotate through the transmission chain 26. The sprocket 25 drives the power shaft 24 to rotate, thereby driving the seed metering wheel 22 in the seed meterer 9 to rotate. The groove on the seed metering wheel 22, together with the guide ring 30, accurately conveys the falling seeds downward. The air pump 31 blows air downward through the air blowing pipe 10 to blow the seeds conveyed by the seed metering wheel 22 into the seed guide tube 13.

[0038] The traction frame 1 connects to the external traction equipment to drive the whole machine to move. The angle of the buffer frame 38 is adjusted by rotating the nut. The buffer frame 38 drives the corrugated plate 39 to pre-cut and furrow the soil. At the same time, rotating the adjusting screw sleeve 47 drives the adjusting bolt 46 to move up and down. The adjusting bolt 46 drives the lifting beam 42 to adjust its position. The lifting beam 42 adjusts the tilt angle of the support frame 14 through the fixing buckle 43 and the fixing spring 45, thereby changing the soil penetration depth of the furrowing disc 15 to adapt to the sowing depth requirements of different crops. The furrowing disc 15 on the support frame 14 opens a V-shaped seed furrow in the soil as the whole machine moves forward. The seed guide tube 13 extends between the furrowing discs 15 to accurately guide the seeds output by the seed metering device 9 into the center of the seed furrow. The seed pressing plate 16 gently presses the seeds into the soil of the seed furrow to make the seeds contact the soil. Then the pressing wheel 35 covers the seed furrow with soil.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A traction-type precision row seeder, comprising a traction frame (1), a frame (2), a seed box (3), a sowing assembly, wheels (4), and a platform (5), wherein the traction frame (1) is disposed on the front side of the platform (5), the seed box (3) is disposed on the upper end of the platform (5), the frame (2) and the wheels (4) are disposed on the left and right sides of the platform (5), and the sowing mechanism is disposed below the seed box (3), characterized in that: The seed box (3) consists of two storage chambers (6) at the front and back. Several guide blocks (7) are arranged in an array inside the storage chamber (6). The top of the guide blocks (7) is set at an inclined angle. The bottom wall of the seed box (3) has two discharge ports (8) between two adjacent guide blocks (7). The seeding mechanism includes a seed metering device (9), which is fixedly connected to the bottom wall of the seed box (3). An air blowing pipe (10) is connected through the front end of the bottom of the seed metering device (9). An adjustment port (11) is opened on the top of the seed metering device (9) and communicates with the discharge port (8). Adjustment plates (12) are slidably connected to the front and rear sides of the top of the seed metering device (9) inside the adjustment port (11). The seed metering device (9) has a seed guide tube (13) that is connected through to the bottom. A support frame (14) is fixedly connected between two adjacent seed guide tubes (13). A ditching disc (15) is rotatably connected to both sides of the bottom of the support frame (14). The ditching disc (15) is set at an inclined angle. The seed guide tube (13) extends to the position between the ditching discs (15). A pressing plate (16) is fixedly connected between the bottom of the support frame (14) and the ditching discs (15).

2. The traction-type precision strip seeder according to claim 1, characterized in that: The outer wall of the seed box (3) is fixedly connected to the top of the walkway (5) by setting a docking plate (17). The top of the seed box (3) is fitted with a dust cover (18). The bottom of the seed box (3) is set at an inclined angle. The storage chambers (6) are staggered.

3. A traction-type precision strip seeder according to claim 2, characterized in that: Inside the storage chamber (6), a guide rod (19) is rotatably connected above the discharge port (8). A rhomboid plate (20) is set on the outer surface of the guide rod (19) between the guide blocks (7). The left end of the guide rod (19) is fixedly connected to the output shaft of the drive motor (21) on the outer wall of the docking plate (17).

4. A traction-type precision strip seeder according to claim 1, characterized in that: The seed metering device (9) has a seed metering wheel (22) rotatably connected to the rear end of the seed metering device (9) below the discharge port (8). The seed metering wheel (22) has a insertion hole (23) at the center. A power shaft (24) is inserted into the insertion hole (23). A sprocket (25) is fixedly connected to the right end of the power shaft (24) away from the side wall of the docking plate (17). The sprockets (25) are meshed with each other through a transmission chain (26). The side wall of the docking plate (17) is meshed with the transmission chain (26) through a speed-regulating motor (27).

5. A traction-type precision strip seeder according to claim 4, characterized in that: The seed metering device (9) has an installation groove at the rear end of the seed metering wheel (22). The rear end of the seed metering device (9) is rotatably connected to the installation groove. The center of the seed metering device (9) is fixedly connected to the outer surface of the seed metering wheel (22). The partition plate (29) extends to the bottom of the seed metering device (9). The two ends of the maintenance cover (28) are provided with buckles. The side wall of the seed metering device (9) is provided with claws that engage with the buckles. The side wall of the maintenance cover (28) is provided with a top block that forms a sliding connection with the end of the seed metering wheel (22).

6. A traction-type precision strip seeder according to claim 1, characterized in that: The inner wall of the seed metering device (9) is fixedly connected to a guide ring (30) in front of the seed metering wheel (22). The end of the air blowing pipe (10) is embedded in the guide ring (30). The opening of the air blowing pipe (10) is set at an inclined angle towards the bottom of the seed metering wheel (22). The inner wall of the docking plate (17) is provided with an air pump (31) connected to the air blowing pipe (10).

7. A traction-type precision strip seeder according to claim 1, characterized in that: The side wall of the adjustment plate (12) engages with the control port (11) by setting a material blocking plate. The bottom wall of the seed box (3) is fixedly connected to the support frame (32) inside the adjustment plate (12). The support frame (32) passes through the adjustment plate (12). The side wall of the adjustment plate (12) is fixedly connected to the electric hydraulic rod (33) at a position away from the support frame (32). The bottom wall of the seed box (3) is connected to the electric hydraulic rod (33) by setting an installation frame (34).

8. A traction-type precision strip seeder according to claim 1, characterized in that: The rear end of the support frame (14) is rotatably connected to the rear side of the trenching disc (15) and the press wheel (35) is rotatably connected. The front end of the walkway (5) is connected to the fixed crossbeam (36). The rear end of the traction frame (1) is connected to the fixed crossbeam (36) through a connecting buckle. Several limiting frames (37) are arrayed on the outer surface of the fixed crossbeam (36). The front end of the support frame (14) and the rear side wall of the limiting frame (37) form a rotatable connection. The rear side wall of the limiting frame (37) is rotatably connected to the support frame (14) below it and the bottom of the buffer frame (38) is rotatably connected to the corrugated disc (39).

9. A traction-type precision strip seeder according to claim 8, characterized in that: The front side wall of the support frame (14) is rotatably connected to a pre-tightened long bolt (40). The top of the buffer frame (38) is provided with a buffer groove that engages with the pre-tightened long bolt (40). A support spring (41) is sleeved on the outer surface of the pre-tightened long bolt (40) behind the buffer groove. A nut is engaged at the end of the pre-tightened long bolt (40) in front of the buffer groove. A lifting beam (42) is slidably connected between the inner walls of the connecting plates (17). A fixing buckle (41) is sleeved on the outer surface of the lifting beam (42) above the support frame (14). 3) A plug rod is provided at the rear end of the fixing buckle (43). A support rod (44) is slidably connected to the outer surface of the plug rod. A moving groove is provided at the top of the support rod (44) to form a sliding connection with the plug rod. The bottom end of the support rod (44) is rotatably connected to the side wall of the support frame (14). A fixing spring (45) is sleeved on the outer surface of the support rod (44) below the fixing buckle (43). A stop is provided on the side wall of the fixing buckle (43) above the fixing spring (45). The support rod (44) is slidably connected inside the stop.

10. A traction-type precision strip seeder according to claim 9, characterized in that: The lifting beam (42) is fixedly connected to the two ends of the lifting beam (42) away from the docking plate (17). The frame (2) and the side wall of the docking plate (17) are provided with slide rails that form a sliding connection with the two ends of the lifting beam (42). The outer surface of the adjusting bolt (46) is engaged with the adjusting sleeve (47). The outer wall of the docking plate (17) is rotatably connected to the outer surface of the adjusting sleeve (47) by setting a fixing plate. The electrical components in the device are all equipped with control modules, and the electrical components are driven and controlled by an external controller.

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