Precise crop seeder with adjustable hole spacing

Abstract

The utility model discloses a crop precision seeder with adjustable hole spacing, which relates to the technical field of agricultural machinery and comprises a traction frame, two ends of the traction frame are respectively connected with a connecting frame in a sliding manner, a land wheel is arranged below the traction frame, two sides of the land wheel are respectively and fixedly connected with an input shaft, and one end of the input shaft far away from the land wheel extends into a transmission case and is rotatably connected with the transmission case. An adjusting mechanism is mounted in the transmission box and is in transmission connection with an output shaft, the output shaft extends out of the transmission box and is fixedly connected with a sleeve, a connecting shaft is slidably connected in the sleeve, one end, far away from the sleeve, of the connecting shaft is rotatably connected with the connecting frame, a hole sowing wheel is in transmission connection with the connecting shaft, and one side of the hole sowing wheel is communicated with a seed box; a plurality of hole forming devices are arranged in the circumferential direction of the hole sowing wheel and are used for sowing. According to the utility model, the hole spacing can be adjusted without replacing the hole forming device, the operation is simple and convenient, the time is saved, the distance between the two hole sowing wheels can be adjusted at the same time, the line spacing can be adjusted, the application range is wide, and the adjustability is strong.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a precision crop seeder with adjustable plant spacing. Background Technology

[0002] my country is a major agricultural country, and intensive farming is of great significance to its agricultural development. Precision sowing of crops such as soybeans and corn often employs hill sowing, requiring reasonable field distribution, uniform plant spacing, and precise seed collection. This process avoids double sowing and missed sowing, while also preventing damage to the seeds.

[0003] During sowing, the plant spacing needs to be adjusted due to the requirements of planting agronomy. Existing sowing devices usually adjust the plant spacing by changing the number of hole components, which is time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need for a precision crop seeder with adjustable plant spacing to solve the problems existing in the above-mentioned technologies. Utility Model Content

[0005] The purpose of this invention is to provide a precision crop seeder with adjustable plant spacing to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides an adjustable-spacing precision crop seeder, including a traction frame, with connecting frames slidably connected to both ends of the traction frame, a ground wheel below the traction frame, and input shafts fixedly connected to both sides of the ground wheel. The end of the input shaft away from the ground wheel extends into a transmission box and is rotatably connected to the transmission box. An adjustment mechanism is installed inside the transmission box, and an output shaft is drivenly connected to the adjustment mechanism. The output shaft extends out of the transmission box and is fixedly connected to a sleeve. A connecting shaft is slidably connected inside the sleeve, and the end of the connecting shaft away from the sleeve is rotatably connected to the connecting frame. A seeding wheel is drivenly connected to the connecting shaft, and a seed box is connected to one side of the seeding wheel. Several seeding devices are arranged circumferentially on the seeding wheel, and the seeding devices are used for sowing.

[0007] Preferably, the adjusting mechanism includes a bushing sleeve fitted on the outside of the input shaft, on which a first gear, a third gear, and a fifth gear are fixedly connected respectively. A transmission shaft is provided below the input shaft, and the transmission shaft is rotatably connected to the inner wall of the transmission box. A second gear, a fourth gear, and a sixth gear are fixedly connected to the transmission shaft. When the first gear meshes with the second gear, the third gear and the fourth gear, and the fifth gear and the sixth gear are misaligned. A seventh gear is also fixedly connected to the transmission shaft, and the seventh gear meshes with an eighth gear. The eighth gear is fixedly connected to the output shaft.

[0008] Preferably, the input shaft is provided with a plurality of telescopic components, the input shaft has a plurality of grooves, the telescopic components are located in the grooves, and the bushing has a plurality of limiting holes, the telescopic components being adapted to the limiting holes.

[0009] Preferably, the telescopic component includes a snap-fit ​​rod that is adapted to the limiting hole, and a spring is fixedly connected to one end of the snap-fit ​​rod at its bottom, while the other end of the spring is fixedly connected to the inner wall of the groove.

[0010] Preferably, a limiting groove is formed on the side of the input shaft away from the groove, and a protrusion is slidably connected in the limiting groove, the protrusion being fixedly connected to the inner wall of the bushing.

[0011] Preferably, the transmission box has a through groove on its side wall, and the through groove is located at the same horizontal position as the input shaft.

[0012] Preferably, the inner wall of the sleeve is symmetrically provided with sliding grooves, and a slider is slidably connected to the inner wall of the sliding groove, and the slider is fixedly connected to the connecting shaft.

[0013] Preferably, the sleeve has a plurality of threaded holes, and a limiting screw is detachably connected to any one of the threaded holes. The limiting screw is hollow inside, and any one of the sliders extends into the limiting screw.

[0014] Preferably, the traction frame has connecting cylinders fixedly connected to both ends, the end of the connecting frame extends into the connecting cylinder and is slidably connected to the connecting cylinder, and the limiting structure inside the connecting cylinder is consistent with the structure inside the sleeve.

[0015] Preferably, a connecting plate is fixedly connected to the top surface of the transmission box, and the top of the connecting plate is fixedly connected to the traction frame.

[0016] This utility model discloses the following technical effects: In use, an external drive device connects to the traction frame, and the ground wheel contacts the ground. When the ground wheel rotates, it drives the input shaft to rotate. The input shaft, after speed change through the adjustment mechanism, transmits the speed to the output shaft. The output shaft drives the sleeve and connecting shaft to rotate, and the connecting shaft drives the seeding wheel to rotate. The seeding wheel drives the hole-forming device to rotate, and the hole-forming device extends into the soil, allowing seeds in the seed box to fall into the hole-forming device for sowing. By adjusting the structure to change the rotation speed of the output shaft and connecting shaft, the hole spacing can be adjusted. Adjusting the position of the connecting shaft within the sleeve adjusts the distance between the two seeding wheels, thereby adjusting the row spacing, achieving multiple adjustment purposes, saving time and effort. This utility model can adjust the hole spacing without replacing the hole-forming device, making it simple and convenient to operate, saving time, and allowing simultaneous adjustment of the distance between the two seeding wheels to adjust the row spacing. It has a wide range of applications and strong adjustability. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a top sectional view of the sleeve of this utility model;

[0020] Figure 3 This is a main sectional view of the transmission box of this utility model;

[0021] Figure 4 This is a top sectional view of the transmission box of this utility model;

[0022] In the diagram: 1. Traction frame; 2. Connecting cylinder; 3. Connecting frame; 4. Seed box; 5. Seeding wheel; 6. Hole-forming device; 7. Connecting shaft; 8. Sleeve; 9. Transmission box; 10. Input shaft; 11. Connecting plate; 12. Ground wheel; 13. Output shaft; 14. Slide groove; 15. Slider; 16. Threaded hole; 17. Limit screw; 18. First gear; 19. Second gear; 20. Third gear; 21. Fourth gear; 22. Fifth gear; 23. Sixth gear; 24. Seventh gear; 25. Eighth gear; 26. Transmission shaft; 27. Bushing; 28. Limit hole; 29. ​​Connecting rod; 30. Spring; 31. Through groove. Detailed Implementation

[0023] Adjustable-space precision seeders are an important component of modern agricultural machinery. They enable adjustments to the plant spacing based on crop planting needs, thereby optimizing seed utilization and the crop growth environment. This article will discuss in detail the current structural overview of adjustable-space precision seeders, including their development history, working principle, key components, and technical features.

[0024] The Concept and Development History of Precision Seeding: 1. Concept of Precision Seeding: Precision seeding refers to a modern technology that precisely sows seeds into the soil according to agricultural requirements and a pre-determined sowing depth, row spacing, and seed count during sowing operations. Precision seeding can save seeds to a great extent, achieving both single-seed sowing and fixed-seed hill sowing. Compared with ordinary mechanized row sowing, the seed sowing effect is more uniform, which is more conducive to nutrient balance, ensuring crop germination rate and healthy growth, and increasing final yield. 2. Development History of Precision Seeding: International research on precision seeding machinery began in the 1940s. Through continuous research and development, precision seeding machinery has become widely used in developed countries. In addition to precision seeding, seeding machinery can also simultaneously perform multiple functions such as land preparation, fertilization, plant protection, soil covering, and compaction. Relatively speaking, my country's precision seeding machinery technology started later, with initial research beginning in the 1970s. Currently, there is still considerable room for improvement in the technology level and its widespread adoption.

[0025] The working principle of an adjustable-spacing precision seeder: An adjustable-spacing precision seeder is an advanced agricultural machine that works by adjusting relevant components to flexibly adjust the planting spacing. Specifically, this seeder utilizes a series of mechanical devices and adjustment mechanisms to adjust the planting spacing by changing the position or working state of the seed dispensing components. 1. Seed supply system: The seed supply system typically consists of a seed box, a seed metering device, and a transmission device. The seed box stores seeds, the seed metering device dispenses a quantitative amount of seeds, and the transmission device transports the seeds to the sowing position. 2. Sowing component: The sowing component is the core of the adjustable-spacing precision seeder, with a complex structure and multiple functions. It typically consists of a hole-forming device, a seed metering device, and a soil covering device. The hole-forming device creates planting holes on the ground, the seed metering device precisely places the seeds in the holes, and the soil covering device covers the seeds with soil. 3. Adjustment mechanism: The adjustment mechanism is the key part for adjusting the planting spacing. It typically consists of an adjustment bracket, an adjustment plate, and a lever ring. By changing the connection height of the adjusting bracket on the fixed mounting shaft, the two dial rings undergo axial displacement on the seeding wheel shaft, driving the seeding wheel and ground wheel to expand or contract radially, thereby achieving the adjustment of the seeding spacing.

[0026] Key components of an adjustable-spacing precision seeder: The key components of an adjustable-spacing precision seeder include the mounting frame, fixed mounting shaft, seeding wheel shaft, seeding wheel, ground wheel, and adjusting bracket. These components work together to achieve flexible adjustment of the seeding spacing. 1. Mounting Frame: The mounting frame is the main structure of the adjustable-spacing precision seeder, used to support and connect other components. The mounting frame is usually made of high-strength materials to ensure its stability and durability. 2. Fixed Mounting Shaft: The fixed mounting shaft is the vertically downward extension of the mounting frame, used to connect the adjusting bracket and the seeding wheel shaft. The position and height of the fixed mounting shaft have a significant impact on the adjustment of the seeding spacing. 3. Seeding Wheel Shaft: The seeding wheel shaft is a key component with a horizontal shaft connected to the bottom of the mounting frame, used to fix and connect the seeding wheel and ground wheel. The seeding wheel shaft drives the seeding wheel and ground wheel through rotational motion. 4. Seeding Wheel: The seeding wheel is one of the core components of the seeder, used to form seeding holes and place seeds. The seeding reel is equipped with a seed-forming device that precisely places seeds into the seeding holes through rotation. 5. Ground wheel: The ground wheel is an important component of the adjustable-spacing precision seeder. It supports the seeder's movement on the ground and drives the seeding reel and seed metering device. The ground wheel is usually made of wear-resistant materials to improve its service life. 6. Adjustment bracket: The adjustment bracket is a key component for adjusting the seed spacing. It consists of a bracket body, an adjustment plate, and a lever ring. By changing the connection height, the adjustment bracket drives the seeding reel and ground wheel to expand or contract radially, thereby adjusting the seed spacing.

[0027] Technical Features of Adjustable Plant Spacing Precision Seeders: Adjustable plant spacing precision seeders possess several technical features that make them widely applicable in agricultural production. 1. Flexible Plant Spacing Adjustment: Adjustable plant spacing allows for flexible adjustment of the planting spacing through components such as the adjustable support frame. This wide adjustment range can meet the needs of different crops and planting environments. 2. High-Precision Sowing: Utilizing advanced seed metering and seed-forming devices, adjustable plant spacing precision seeders enable precise control and placement of seeds. This high-precision sowing helps improve seed utilization and crop growth quality. 3. Seed Saving: Because adjustable plant spacing precision seeders achieve high-precision sowing, seed waste is significantly reduced. This helps lower agricultural production costs and improve economic efficiency. 4. Increased Crop Yield: By optimizing planting spacing and seed placement, adjustable plant spacing precision seeders improve the crop growing environment, increasing crop yield and quality. This optimization effect is significant for a variety of crops. 5. High adaptability: The adjustable-spacing precision seeder is highly adaptable and can be applied to a variety of crops and planting environments. Furthermore, this seeder can be used in conjunction with other agricultural machinery to achieve more efficient agricultural production.

[0028] Analysis of the existing structure of an adjustable-spacing precision seeder: 1. Structural composition: An adjustable-spacing precision seeder typically consists of a mounting frame, a fixed mounting shaft, a seeding wheel shaft, a seeding wheel, a ground wheel, and an adjusting bracket. These components work together to adjust the seeding spacing and achieve precise seeding. 2. Component function analysis: Mounting frame: As the main structure of the seeder, the mounting frame supports and connects other components, ensuring their stability and reliability. Fixed mounting shaft: Connects the adjusting bracket and the seeding wheel shaft, allowing adjustment of the seeding spacing by changing the height of the adjusting bracket. Seeding wheel shaft: Fixes the seeding wheel and ground wheel, driving the seeding components through rotation. Seeding wheel: Forms seeding holes and places seeds, achieving precise seed placement through the hole-forming device. Ground wheel: Supports the seeder's movement on the ground and drives the seeding wheel and seed metering device, ensuring continuous and stable seeding. Adjusting bracket: A key component for adjusting the seeding spacing, driving the seeding wheel and ground wheel to expand or contract radially by changing the connection height.

[0029] Application Prospects of Adjustable-Spacing Precision Seeders: Adjustable-spacing precision seeders have broad application prospects in agricultural production. With the acceleration of agricultural modernization and the increasing demands for agricultural product quality, adjustable-spacing precision seeders will gradually become an important tool in agricultural production. 1. Improve Agricultural Production Efficiency: Adjustable-spacing precision seeders enable flexible adjustment of plant spacing and high-precision sowing, helping to improve agricultural production efficiency. This efficient sowing method can significantly shorten the sowing cycle, improve sowing quality, and thus increase crop yield and quality. 2. Promote Agricultural Modernization: As an important component of modern agricultural machinery, the application and promotion of adjustable-spacing precision seeders contribute to the modernization of agriculture. By introducing advanced technologies such as intelligentization and automation, the accuracy and efficiency of sowing can be further improved, labor costs reduced, and agricultural production benefits increased. 3. Meet Diverse Planting Needs: Adjustable-spacing precision seeders have wide adaptability and can be applied to various crops and planting environments. This helps meet the planting needs of different regions and different crops, promoting the diversification and sustainable development of agricultural production.

[0030] An existing embodiment in this field—a corn hill-planting seeder with adjustable planting spacing—comprises a support plate. A first mounting plate perpendicular to the support plate is located on one side of the support plate. Both the upper and lower end faces of the support plate are fixed to the first mounting plate via ribs. A three-point suspension mechanism for docking with agricultural machinery is provided on the top of the support plate and on the first mounting plate. A plurality of evenly arranged first connecting lug groups are located on the upper middle part of the side of the first mounting plate away from the support plate. A plurality of evenly arranged second connecting lug groups, corresponding one-to-one with the positions of the first connecting lug groups, are located on the lower middle part of the side of the first mounting plate away from the support plate. A plurality of hill-planting mechanisms for hill-planting and fertilizing corn seeds are provided on one side of the first mounting plate.

[0031] The seeding mechanism includes two first baffles parallel to the first mounting plate, with their tops connected by a top plate. A first fixing rod, which can be fixed to a first connecting lug assembly with bolts, is symmetrically arranged on the upper middle part of the side wall of the first baffle closest to the first mounting plate. A second fixing rod, which can be fixed to a second connecting lug assembly with bolts, is symmetrically arranged on the lower middle part of the side wall of the first baffle. Both ends of the first baffles are fitted with wheels via hinges. A mounting box, which is slidably connected to the two first baffles, is located between them. A mounting column is located on one side of the bottom of the top plate. A columnar first inner groove is formed on the bottom surface of the mounting column. A first spiral groove, with one end spiraling, is formed within the first inner groove. The upper and lower ends of the first spiral groove are connected by vertical grooves formed along the height direction of the first inner groove.

[0032] The placement box has symmetrical sliders on both sides, which are slidably connected to the first groove on the first baffle along its height direction. The sliding stroke of the placement box is equal to the sowing depth of the corn seeds. The placement box has a bottom-through placement cavity. A placement base plate is provided on the bottom of the placement cavity opposite to the first fixing rod. A fertilizer storage box is fixed to the inner wall of the placement cavity above the placement base plate. A discharge pipe groove is provided on the bottom of the fertilizer storage box near the first fixing rod. The fertilizer storage box has a slope for introducing fertilizer into the discharge pipe groove. A first feed pipe for replenishing fertilizer is provided at one end of the fertilizer storage box and extends out of the placement box.

[0033] A first drive shaft concentric with the discharge pipe groove is provided inside the discharge pipe groove. One end of the first drive shaft extends upward out of the placement box and is equipped with a placement column. The placement column is located in the first inner groove. A first shaft protrusion is provided on the shaft body of the placement column. The first shaft protrusion is slidably connected and engaged with the vertical groove and the first spiral slide groove. Spiral blades are provided on the shaft section of the first drive shaft located in the fertilizer storage box and the discharge pipe groove. The first drive shaft is rotatably connected and engaged with the placement box and the fertilizer storage box.

[0034] A seed box with a bottom-down through-hole shape is provided on one side of the mounting base and slides against the inner wall of the mounting cavity. Guide blocks are symmetrically provided at both ends of the seed box, and the guide blocks are slidably connected to the fourth sliding groove opened on the end wall of the mounting cavity. A sowing wheel is provided in the lower middle part of the seed box, which can block the through hole at the bottom of the seed box. The sowing wheel is rotatably connected to the internal cavity of the seed box. A seed groove for quantitative seed discharge is opened on the outer circumference of the sowing wheel. A second drive shaft is provided on the sowing wheel and is concentric with it. The two ends of the second drive shaft extend out of the mounting box through the second sliding groove opened at both ends of the mounting box and are equipped with first gears. The bottom of the first gear meshes with a second rack plate arranged along the length direction of the mounting box end wall. The second drive shaft is slidably connected to the second sliding groove. A second feed pipe for replenishing corn seeds is provided at one end of the seed box and extends out of the mounting box.

[0035] A first conical soil-breaking plate is provided on the bottom side of the seed box away from the mounting base. The first conical soil-breaking plate is mirrored with the second conical soil-breaking plate provided on the bottom of the mounting base. Connecting plates that slide against the top wall of the mounting base are symmetrically provided at both ends of the side of the seed box close to the mounting base. The positions of the two connecting plates correspond to the positions of the discharge pipe groove. The two connecting plates are connected by a push plate. The top of the push plate is provided with a sealing plate that can close the bottom outlet of the discharge pipe groove.

[0036] The placement box is equipped with a third drive shaft arranged along its width direction. The third drive shaft is rotatably connected to the placement box. The two ends of the third drive shaft extend out of the placement box and are equipped with second gears. The second gears mesh with the first rack plate provided on the side wall of the first baffle. In the initial state, there is a gap between the second gear and the first rack plate. The middle part of the shaft section of the third drive shaft located in the placement cavity is equipped with a placement cylinder fixed thereto.

[0037] A first ear seat is provided in the middle of the side of the seed box away from the placement base plate. A second ear seat is mounted on the first ear seat and rotatedly connected to it via a hinge. A drive rod is provided on the second ear seat. One end of the drive rod extends into a sliding cavity opened inside the placement cylinder and a first limiting ring is installed therein. The first limiting ring is slidably connected to the sliding cavity. A first spring is provided inside the sliding cavity. The two ends of the first spring are fixed to the end wall of the first limiting ring and the inner wall of the sliding cavity, respectively. Symmetrical connecting columns are arranged perpendicularly to the top of the placement box on both sides. One end of each connecting column extends into a top plate that is slidably connected to it and is fitted with a second limiting ring. A second spring is sleeved on the shaft section of the connecting column located between the top plate and the second limiting ring. A driving cylinder is provided on the bottom surface of the top plate and is rotatably connected to it. The bottom of the driving cylinder has a second inner groove, and a second spiral groove with its first and last ends connected is provided in the second inner groove. A pressing shaft is provided on the top surface of the placement box. The pressing shaft is located in the second inner groove and is slidably connected to it. A second shaft protrusion is provided on the outer circular surface of the pressing shaft and is slidably connected to the second spiral groove.

[0038] When corn seeds need to be sown in holes, firstly, according to the spacing of corn seeds on the cultivated land, the first and second fixed rods of several hole-sowing mechanisms are fixed to the first and second connecting ear groups respectively by bolts; simultaneously, they are fixed to the agricultural machinery through a three-point suspension mechanism; when the agricultural machinery transports them to the cultivated land for sowing, the operator starts the motor, the motor power output shaft rotates, driving the drive cylinder to rotate, the drive cylinder rotates, causing the second shaft protrusion on the pressing shaft inside to slide along the second spiral groove, and then the pressing shaft drives the placement box to move up and down reciprocally; when the placement box moves down, before the second gear meshes with the first rack plate, the first conical soil-breaking plate and the second conical soil-breaking plate are kept vertical for hole digging. When the placement box continues to move down, the second gear meshes with the first rack plate and rotates, thereby driving the third transmission shaft and the placement cylinder to rotate, and then the placement cylinder, under the compensation of the first spring, drives the seed box to move horizontally, thereby driving the second transmission shaft to move, and then the first gear... The wheel meshes with the second rack plate and rotates, causing the second drive shaft to rotate and drive the sowing wheel to rotate. This rotates the corn seeds in the seed trough downwards and onto the first and second conical soil-breaking plates. The movement of the seed box synchronously moves the first conical soil-breaking plate, thus completing the hole-digging operation. The synchronous movement of the seed box drives the push plate through the connecting plate to push the fertilizer falling from the discharge pipe trough and into the hole through the second conical soil-breaking plate. At this time, the sealing plate moves synchronously to block the discharge pipe trough. When the placement box moves downwards, the first shaft protrusion moves along the vertical groove, so the first drive shaft does not rotate. When the placement box moves upwards, the sealing plate opens and closes. At this time, the first shaft protrusion slides along the first spiral groove, so the first drive shaft and spiral blades rotate, which can guide the fertilizer from the discharge pipe trough between the placement base plate and the two connecting plates, ready for the next fertilizer push. The bottom walls of the first baffle, the first conical soil-breaking plate, and the second conical soil-breaking plate are slightly higher than the top wall of the corn planting ridge. The second spring can assist the placement box in moving upwards and resetting.

[0039] With the acceleration of agricultural modernization and the increasing demands for agricultural product quality, adjustable-spacing precision seeders will gradually become an important tool in agricultural production. In the future, we will continue to dedicate ourselves to researching and developing more efficient, intelligent, and reliable seeding machinery, contributing to the sustainable development of agricultural production.

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figure 1-Figure 4 As shown, this embodiment provides an adjustable-spacing precision crop seeder, including a traction frame 1, with connecting frames 3 slidably connected to both ends of the traction frame 1. A ground wheel 12 is provided below the traction frame 1, and input shafts 10 are fixedly connected to both sides of the ground wheel 12. The end of the input shaft 10 away from the ground wheel 12 extends into the transmission box 9 and is rotatably connected to the transmission box 9. An adjustment mechanism is installed in the transmission box 9, and the adjustment mechanism is drivenly connected to an output shaft 13. The output shaft 13 extends out of the transmission box 9 and is fixedly connected to a sleeve 8. A connecting shaft 7 is slidably connected inside the sleeve 8. The end of the connecting shaft 7 away from the sleeve 8 is rotatably connected to the connecting frame 3. A seeding wheel 5 is drivenly connected to the connecting shaft 7. A seed box 4 is connected to one side of the seeding wheel 5. Several seeding devices 6 are arranged circumferentially on the seeding wheel 5, and the seeding devices 6 are used for sowing.

[0043] In use, the traction frame 1 is connected via an external drive device. The ground wheel 12 contacts the ground, and when the ground wheel 12 rotates, it drives the input shaft 10 to rotate. The input shaft 10 transmits the speed to the output shaft 13 after being adjusted by the adjustment mechanism. The output shaft 13 drives the sleeve 8 and the connecting shaft 7 to rotate. The connecting shaft 7 drives the seeding wheel 5 to rotate, and the seeding wheel 5 drives the seeding device 6 to rotate. The seeding device 6 extends into the soil, and the seeds in the seed box 4 fall into the seeding device 6 for sowing. By adjusting the structure to change the rotation speed of the output shaft 13 and the connecting shaft 7, the spacing between holes can be adjusted. Adjusting the position of the connecting shaft 7 within the sleeve 8 adjusts the distance between the two seeding wheels 5, thereby adjusting the row spacing, achieving multiple adjustment purposes, saving time and effort. This utility model can adjust the spacing between holes without replacing the seeding device 6, making it simple and convenient to operate, saving time, and able to adjust the distance between the two seeding wheels 5 simultaneously to adjust the row spacing. It has a wide range of applications and strong adjustability.

[0044] The scheme is further optimized. The adjustment mechanism includes a bushing 27 sleeved on the outside of the input shaft 10. A first gear 18, a third gear 20, and a fifth gear 22 are fixedly connected to the bushing 27. A transmission shaft 26 is provided below the input shaft 10. The transmission shaft 26 is rotatably connected to the inner wall of the transmission box 9. A second gear 19, a fourth gear 21, and a sixth gear 23 are fixedly connected to the transmission shaft 26. When the first gear 18 meshes with the second gear 19, the third gear 20 and the fourth gear 21, and the fifth gear 22 and the sixth gear 23 are misaligned. A seventh gear 24 is also fixedly connected to the transmission shaft 26. The seventh gear 24 meshes with an eighth gear 25. The eighth gear 25 is fixedly connected to the output shaft 13. The input shaft 10 drives the bushing 27 to rotate, the bushing 27 drives the first gear 18 to rotate, the first gear 18 drives the second gear 19 to rotate, the second gear 19 drives the transmission shaft 26 to rotate, the transmission shaft 26 drives the seventh gear 24 to rotate, the seventh gear 24 drives the eighth gear 25 to rotate, and the eighth gear 25 drives the output shaft 13 to rotate, thereby completing the sowing work. By changing the combination of different gears, the rotation speed of the output shaft 13 can be changed to achieve the purpose of adjusting the spacing between holes, which is convenient to operate and saves time and effort.

[0045] To further optimize the design, the input shaft 10 is equipped with several telescopic components. Several grooves are formed on the input shaft 10, and the telescopic components are located within these grooves. Several limiting holes 28 are formed on the bushing 27, and the telescopic components are fitted into these limiting holes 28. The telescopic components extend into the limiting holes 28, ensuring that the bushing 27 rotates synchronously with the input shaft 10, while also facilitating adjustment.

[0046] The design is further optimized. The telescopic component includes a snap-fit ​​rod 29, which is adapted to the limiting hole 28. One end of a spring 30 is fixedly connected to the bottom of the snap-fit ​​rod 29, and the other end of the spring 30 is fixedly connected to the inner wall of the groove. If you want the third gear 20 to mesh with the fourth gear 21, you can hold a long rod and insert it into the limiting hole 28 to press against the snap-fit ​​rod 29 and press it down to retract the snap-fit ​​rod 29 into the groove. Then, use another long rod to slide the bushing 27. When the bushing 27 slides, the long rod in the limiting hole 28 retracts. Continue to move the bushing 27 until the other limiting hole 28 is above the adjacent snap-fit ​​rod 29. Under the action of the spring 30, the snap-fit ​​rod 29 extends and inserts into the limiting hole 28. At this time, the third gear 20 meshes with the fourth gear 21, completing the adjustment.

[0047] To further optimize the design, a limiting groove is provided on the side of the input shaft 10 away from the groove. A protrusion is slidably connected within the limiting groove, and the protrusion is fixedly connected to the inner wall of the bushing 27. The limiting groove and the protrusion ensure that the bushing 27 will not rotate when it moves, thus ensuring convenient adjustment.

[0048] To further optimize the design, a through groove 31 is provided on the side wall of the transmission box 9, and the through groove 31 is located at the same horizontal position as the input shaft 10. The through groove 31 facilitates the insertion of a long rod into the transmission box 9 and makes it easier to observe the internal condition of the transmission box 9.

[0049] In a further optimized design, symmetrical grooves 14 are formed on the inner wall of the sleeve 8, and sliders 15 are slidably connected to the inner wall of the grooves 14. The sliders 15 are fixedly connected to the connecting shaft 7. The grooves 14 and sliders 15 limit the movement of the connecting shaft 7, ensuring that the connecting shaft 7 and the sleeve 8 rotate synchronously.

[0050] To further optimize the design, the sleeve 8 has several threaded holes 16. A limiting screw 17 can be detachably connected to any threaded hole 16. The limiting screw 17 is hollow inside, and any slider 15 can extend into the limiting screw 17. When it is necessary to adjust the distance between the two seeding rollers 5, the limiting screw 17 is removed. At this time, the slider 15 is not limited, and the connecting shaft 7 can be moved to a suitable position within the sleeve 8. The slider 15 also slides synchronously. Then, the limiting screw 17 is screwed into the threaded hole 16, so that the limiting screw 17 fits exactly on the slider 15, thus limiting the slider 15. At the same time, the relative position of the connecting shaft 7 and the sleeve 8 is kept fixed, thus completing the row spacing adjustment.

[0051] The design is further optimized by fixing connecting cylinders 2 to both ends of the traction frame 1. The end of the connecting frame 3 extends into the connecting cylinder 2 and is slidably connected to it. The limiting structure inside the connecting cylinder 2 is consistent with the structure inside the sleeve 8. When the connecting shaft 7 and the sleeve 8 are adjusted, the connecting frame 3 and the connecting cylinder 2 are adjusted synchronously to ensure the stability of the overall structure.

[0052] In a further optimized design, a connecting plate 11 is fixedly attached to the top surface of the transmission box 9, and the top of the connecting plate 11 is fixedly connected to the traction frame 1. The connecting plate 11 serves to fix the transmission box 9, ensuring that the transmission box 9 is in a stable state.

[0053] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A precision crop seeder with adjustable plant spacing, characterized in that: Includes a traction frame (1), with connecting frames (3) slidably connected to both ends of the traction frame (1). A ground wheel (12) is located below the traction frame (1). Input shafts (10) are fixed to both sides of the ground wheel (12). One end of the input shaft (10) away from the ground wheel (12) extends into a transmission box (9) and is rotatably connected to the transmission box (9). An adjustment mechanism is installed inside the transmission box (9), and the adjustment mechanism is tractively connected to an output shaft (13). The output shaft (13) extends out of the transmission box (9) and is fixedly connected to a sleeve (8). A connecting shaft (7) is slidably connected inside the sleeve (8). The end of the connecting shaft (7) away from the sleeve (8) is rotatably connected to the connecting frame (3). A seeding wheel (5) is drivenly connected to the connecting shaft (7). A seed box (4) is connected to one side of the seeding wheel (5). Several seeding devices (6) are arranged around the seeding wheel (5). The seeding devices (6) are used for sowing.

2. The adjustable-spacing precision crop seeder according to claim 1, characterized in that: The adjustment mechanism includes a bushing (27) sleeved on the outside of the input shaft (10). A first gear (18), a third gear (20), and a fifth gear (22) are fixedly connected to the bushing (27). A transmission shaft (26) is provided below the input shaft (10). The transmission shaft (26) is rotatably connected to the inner wall of the transmission box (9). A second gear (19), a fourth gear (21), and a sixth gear (23) are fixedly connected to the transmission shaft (26). When the first gear (18) meshes with the second gear (19), the third gear (20) and the fourth gear (21), and the fifth gear (22) and the sixth gear (23) are misaligned. A seventh gear (24) is also fixedly connected to the transmission shaft (26). The seventh gear (24) meshes with an eighth gear (25). The eighth gear (25) is fixedly connected to the output shaft (13).

3. The adjustable-spacing precision crop seeder according to claim 2, characterized in that: The input shaft (10) is provided with several telescopic components, and several grooves are provided on the input shaft (10). The telescopic components are located in the grooves. Several limiting holes (28) are provided on the bushing (27). The telescopic components are adapted to the limiting holes (28).

4. The adjustable-row-space precision crop seeder according to claim 3, characterized in that: The telescopic assembly includes a snap-fit ​​rod (29) that is adapted to the limiting hole (28). One end of a spring (30) is fixedly connected to the bottom of the snap-fit ​​rod (29), and the other end of the spring (30) is fixedly connected to the inner wall of the groove.

5. The adjustable-spacing precision crop seeder according to claim 4, characterized in that: A limiting groove is provided on the side of the input shaft (10) away from the groove, and a protrusion is slidably connected in the limiting groove. The protrusion is fixedly connected to the inner wall of the bushing (27).

6. The adjustable-spacing precision crop seeder according to claim 5, characterized in that: The transmission box (9) has a through groove (31) on its side wall, and the through groove (31) and the input shaft (10) are located at the same horizontal position.

7. The adjustable-row-space precision crop seeder according to claim 1, characterized in that: The inner wall of the sleeve (8) is symmetrically provided with sliding grooves (14), and a slider (15) is slidably connected to the inner wall of the sliding groove (14). The slider (15) is fixedly connected to the connecting shaft (7).

8. The adjustable-spacing precision crop seeder according to claim 7, characterized in that: The sleeve (8) has several threaded holes (16), and a limiting screw (17) can be detachably connected to any of the threaded holes (16). The limiting screw (17) is hollow inside, and any of the sliders (15) extends into the limiting screw (17).

9. The adjustable-row-space precision crop seeder according to claim 8, characterized in that: The traction frame (1) has connecting cylinders (2) fixed at both ends. The end of the connecting frame (3) extends into the connecting cylinder (2) and is slidably connected to the connecting cylinder (2). The limiting structure inside the connecting cylinder (2) is consistent with the structure inside the sleeve (8).

10. The adjustable-row-space precision crop seeder according to claim 1, characterized in that: A connecting plate (11) is fixedly connected to the top surface of the transmission box (9), and the top of the connecting plate (11) is fixedly connected to the traction frame (1).

Images