Precise crop seeder with adjustable hole spacing

Abstract

The invention discloses a hole-spacing-adjustable crop precision seeder, which relates to the technical field of agricultural machinery and comprises a traction frame, two ends of the traction frame are slidably connected with connecting frames respectively, a land wheel is arranged below the traction frame, two sides of the land wheel are fixedly connected with input shafts respectively, and one end, far away from the land wheel, of each input shaft 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. 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 high.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a precision seeder for crops with adjustable hole distance. Background Art

[0002] my country is a large agricultural country, and intensive farming is of great significance to the development of my country's agriculture. Precision sowing of crops such as soybeans and corn is mostly done by hole sowing, which requires reasonable field distribution, uniform plant spacing, and accurate seed quantity. The sowing process should avoid problems such as reseeding and missing sowing, and avoid damage to the seeds.

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

[0004] Therefore, there is an urgent need for a precision seeder for crops with adjustable hole spacing to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the invention is to provide a precision seeder for crops with adjustable hole distance to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a precision seeder for crops with adjustable hole distance, including a traction frame, connecting frames are slidably connected at both ends of the traction frame, a ground wheel is provided under the traction frame, input shafts are fixedly connected on both sides of the ground wheel, one end of the input shaft away from the ground wheel extends into a transmission box and is rotatably connected to the transmission box, an adjusting mechanism is installed in the transmission box, the adjusting mechanism is transmission-connected 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 of the connecting shaft away from the sleeve is rotatably connected to the connecting frame, a hole-seeding wheel is transmission-connected on the connecting shaft, one side of the hole-seeding wheel is connected to a seed box, a plurality of hole-forming devices are arranged circumferentially on the hole-seeding wheel, and the hole-forming devices are used for sowing.

[0007] Preferably, the adjustment mechanism includes a sleeve sleeved on the outside of the input shaft, and the first gear, the third gear and the fifth gear are respectively fixed to the sleeve. A transmission shaft is provided below the input shaft, and the transmission shaft is rotatably connected to the inner wall of the transmission box. The second gear, the fourth gear and the sixth gear are respectively fixed to the transmission shaft. When the first gear is meshed with the second gear, the third gear and the fourth gear, and the fifth gear and the sixth gear are staggered. The transmission shaft is also fixed with a seventh gear, the seventh gear is meshed with an eighth gear, and the eighth gear is fixed to the output shaft.

[0008] Preferably, a plurality of telescopic components are arranged on the input shaft, a plurality of grooves are formed on the input shaft, the telescopic components are located in the grooves, a plurality of limiting holes are formed on the shaft sleeve, and the telescopic components are matched with the limiting holes.

[0009] Preferably, the telescopic assembly comprises a clamping rod, the clamping rod is adapted to the limiting hole, one end of a spring is fixedly connected to the bottom of the clamping rod, and the other end of the spring is fixedly connected to the inner wall of the groove.

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

[0011] Preferably, a through slot is provided on the side wall of the transmission box, and the through slot and the input shaft are located at the same horizontal position.

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

[0013] Preferably, a plurality of threaded holes are provided on the sleeve, and a limit screw is detachably connected to any of the threaded holes, the limit screw is hollow inside, and any of the sliders extends into the limit screw.

[0014] Preferably, connecting tubes are fixedly connected to both ends of the traction frame, the end of the connecting frame extends into the connecting tube and is slidably connected to the connecting tube, and the limiting structure in the connecting tube is consistent with the structure in 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] The present invention discloses the following technical effects: when in use, the traction frame is connected through an external driving device, the ground wheel contacts the ground, and the ground wheel rotates to drive the input shaft to rotate. The input shaft is transmitted to the output shaft after the speed is changed by the adjustment mechanism, and the output shaft drives the sleeve and the connecting shaft to rotate, and the connecting shaft drives the hole-casting wheel to rotate, and the hole-casting wheel drives the hole-forming device to rotate. The hole-forming device extends into the soil, and the seeds in the seed box fall into the hole-forming device for sowing; the rotation speed of the output shaft and the connecting shaft is changed by the adjustment structure, so as to adjust the hole distance; the position of the connecting shaft in the sleeve is adjusted to adjust the spacing between the two hole-casting wheels, and then the row spacing is adjusted, so as to achieve the purpose of multiple adjustments, saving time and labor. The present invention can complete the adjustment of the hole distance without replacing the hole-forming device, is simple and convenient to operate, saves time, and can simultaneously adjust the distance between the two hole-casting wheels and adjust the row spacing, so as to have a wide range of application and strong adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a top cross-sectional view of the sleeve of the present invention;

[0020] Figure 3 It is a main cross-sectional view of the transmission box of the present invention;

[0021] Figure 4 A top cross-sectional view of the transmission case of the present invention;

[0022] In the figure: 1. traction frame; 2. connecting tube; 3. connecting frame; 4. seed box; 5. seeding wheel; 6. seeding 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. ​​clamping rod; 30. spring; 31. through groove. DETAILED DESCRIPTION

[0023] The precision seeder with adjustable hole spacing is an important part of modern agricultural machinery. It can adjust the sowing spacing according to the needs of crop planting, thereby optimizing seed utilization and crop growth environment. This article will discuss in detail the existing structural overview of the precision seeder with adjustable hole spacing, including its development history, working principle, key components and technical characteristics.

[0024] The concept and development history of precision seeding: 1. The concept of precision seeding: Precision seeding refers to a modern technology that accurately sows seeds into the soil according to the pre-determined furrowing depth, sowing row spacing and sowing number of seeds in the sowing operation according to agricultural requirements and sowing plans. Precision seeding can save seeds to a great extent. It can not only meet the requirements of single seed sowing, but also meet the requirements of fixed number of seed sowing. Compared with ordinary mechanized strip sowing, the sowing effect of seeds is more uniform, which is more conducive to the balance of nutrients, can ensure the emergence rate and healthy growth of crops, and at the same time increase the final yield of production. 2. The development history of precision seeding: The international research on precision seeding machinery began in the 1940s. After continuous research and development, the popularization of precision seeding machinery in developed countries has been very widespread. In addition to the function of precision sowing, seeding machinery can also complete multiple functions such as land preparation, fertilization, plant protection, covering, and suppression at the same time. Relatively speaking, my country's precision seeding machinery technology started late. The initial research began in the 1970s. At this stage, there is still a lot of room for improvement in the technical level and popularity.

[0025] Working principle of precision seeder with adjustable hole spacing: The precision seeder with adjustable hole spacing is an advanced agricultural machinery. Its working principle is to achieve flexible adjustment of the sowing spacing by adjusting the relevant components of the seeder. Specifically, the seeder uses a series of mechanical devices and adjustment mechanisms to achieve the purpose of adjusting the sowing spacing by changing the position or working state of the seed discharge components. 1. Seed supply system: The seed supply system usually consists of a seed box, a seed meter and a transmission device. The seed box is used to store seeds, and the seed meter is responsible for quantitatively taking out seeds and transporting seeds to the sowing position through the transmission device. 2. Sowing components: The sowing components are the core part of the precision seeder with adjustable hole spacing, and its structure is complex and its functions are diverse. The sowing components usually consist of a hole former, a seed meter and a soil cover. The hole former is responsible for forming sowing holes on the ground, the seed meter places the seeds accurately in the sowing holes, and the soil cover is responsible for covering the seeds with soil. 3. Adjustment mechanism: The adjustment mechanism is the key part to achieve the adjustment of sowing spacing. The adjustment mechanism usually consists of an adjustment bracket, an adjustment pull plate and a dial ring. By changing the connection height of the adjustment bracket on the fixed installation shaft, the two shift rings are axially displaced on the hole-seeding wheel shaft, and drive the hole-seeding wheel and the ground wheel to expand or contract radially, thereby achieving adjustment of the sowing spacing.

[0026] Key components of adjustable hole distance precision seeder: The key components of adjustable hole distance precision seeder include mounting frame, fixed mounting shaft, hole sowing wheel shaft, hole sowing wheel, ground wheel, adjustment bracket, etc. These components work together to achieve flexible adjustment of sowing spacing. 1. Mounting frame: The mounting frame is the main structure of the adjustable hole distance precision seeder, which is 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 vertical downward extension of the mounting frame, which is used to connect the adjustment bracket and the hole sowing wheel shaft. The position and height of the fixed mounting shaft have an important influence on the adjustment of sowing spacing. 3. Hole sowing wheel shaft: The hole sowing wheel shaft is a key component with a horizontal shaft connected to the bottom of the mounting frame, which is used to fix the hole sowing wheel and the ground wheel. The hole sowing wheel shaft drives the hole sowing wheel and the ground wheel to work through rotation. 4. Hole sowing wheel: The hole sowing wheel is one of the core components of the seeder, which is used to form sowing holes and place seeds. The hole-seeding wheel is equipped with a hole-forming device, which accurately places the seeds in the sowing holes through rotational motion. 5. Ground wheel: The ground wheel is an important component of the precision seeder with adjustable hole spacing. It is used to support the seeder to move on the ground and drive the hole-seeding wheel and the seed meter to work. The ground wheel is usually made of wear-resistant materials to increase its service life. 6. Adjustment bracket: The adjustment bracket is a key component for adjusting the sowing spacing. It consists of a bracket body, an adjustment pull plate and a dial ring. The adjustment bracket drives the hole-seeding wheel and the ground wheel to expand or contract radially by changing the connection height, thereby adjusting the sowing spacing.

[0027] Technical features of adjustable hole distance precision seeder: The adjustable hole distance precision seeder has a variety of technical features, which make it have a wide range of application prospects in agricultural production. 1. Flexible adjustment of sowing spacing: The adjustable hole distance precision seeder can flexibly adjust the sowing spacing by adjusting components such as the bracket. This wide adjustment range can meet the needs of different crops and planting environments. 2. High-precision sowing: The adjustable hole distance precision seeder adopts advanced seeding devices and hole forming devices to achieve precise control and placement of seeds. This high-precision sowing helps to improve the utilization rate of seeds and the growth quality of crops. 3. Save seeds: Since the adjustable hole distance precision seeder can achieve high-precision sowing, it can greatly reduce seed waste. This helps to reduce agricultural production costs and improve economic benefits. 4. Increase crop yields: The adjustable hole distance precision seeder can improve the growth environment of crops and increase the yield and quality of crops by optimizing the sowing spacing and seed placement position. This optimization effect is significant in a variety of crops. 5. Strong adaptability: The precision seeder with adjustable hole distance has wide adaptability and can be applied to a variety of crops and planting environments. At the same time, the seeder can also be used in conjunction with other agricultural machinery to achieve more efficient agricultural production.

[0028] Analysis of the existing structure of the precision seeder with adjustable hole spacing: 1. Structural composition: The precision seeder with adjustable hole spacing is usually composed of a mounting frame, a fixed mounting shaft, a hole-seeding wheel shaft, a hole-seeding wheel, a ground wheel, an adjustment bracket and other components. These components are connected and matched to jointly achieve the adjustment of the sowing spacing and the precise sowing of seeds. 2. Analysis of component functions: Mounting frame: As the main structure of the seeder, the mounting frame is responsible for supporting and connecting other components to ensure its stability and reliability. Fixed mounting shaft: Connect the adjustment bracket and the hole-seeding wheel shaft, and adjust the sowing spacing by adjusting the height change of the bracket. Hole-seeding wheel shaft: Fixedly sleeve the hole-seeding wheel and the ground wheel, and drive the sowing components to work through rotation. Hole-seeding wheel: Forms sowing holes and places seeds, and realizes precise placement of seeds through the hole-forming device. Ground wheel: Supports the seeder to move on the ground, and drives the hole-seeding wheel and the seed meter to work, ensuring the continuity and stability of sowing. Adjustment bracket: The key component for adjusting the sowing spacing, driving the hole-seeding wheel and the ground wheel to expand or contract radially by changing the connection height.

[0029] Application prospects of adjustable hole distance precision seeder: Adjustable hole distance precision seeder has broad application prospects in agricultural production. With the acceleration of agricultural modernization and the improvement of people's requirements for the quality of agricultural products, adjustable hole distance precision seeder will gradually become an important tool in agricultural production. 1. Improve agricultural production efficiency: Adjustable hole distance precision seeder can realize flexible adjustment of sowing spacing and high-precision sowing, which helps to improve agricultural production efficiency. This efficient sowing method can greatly shorten the sowing cycle and improve the sowing quality, thereby increasing the yield and quality of crops. 2. Promote the process of agricultural modernization: As an important part of modern agricultural machinery, the application and promotion of adjustable hole distance precision seeder helps to promote the process of agricultural modernization. By introducing advanced technologies such as intelligence and automation, the accuracy and efficiency of sowing can be further improved, labor costs can be reduced, and agricultural production benefits can be improved. 3. Meet diversified planting needs: Adjustable hole distance precision seeder has a wide range of adaptability and can be applied to a variety of crops and planting environments. This helps to meet the planting needs of different regions and different crops, and promote the diversification and sustainable development of agricultural production.

[0030] An implementable embodiment that has been discovered in the field is a corn hole seeding machine with adjustable sowing spacing, which includes a bracket plate, a first mounting plate perpendicular to the bracket plate is arranged on one side of the bracket plate, and the upper and lower end surfaces of the bracket plate are fixed to the first mounting plate by ribs; a three-point suspension mechanism docking with the agricultural machinery is arranged on the top of the bracket plate and the first mounting plate; a plurality of evenly arranged first connecting ear seat groups are arranged on the middle and upper part of a side of the first mounting plate away from the bracket plate, and a plurality of evenly arranged second connecting ear seat groups corresponding to the positions of the plurality of first connecting ear seat groups are arranged on the middle and lower part of a side of the first mounting plate away from the bracket plate; a plurality of hole seeding mechanisms for hole seeding and fertilizing corn seeds are arranged on one side of the first mounting plate.

[0031] The hole-seeking mechanism includes two first baffles parallel to the first placement plate, the tops of the two first baffles are connected by a top plate, a first fixing rod that can be fixed to the first connecting ear seat group by bolts is symmetrically arranged at the middle and upper part of the side wall of the first baffle on the side close to the first placement plate, and a second fixing rod that can be fixed to the second connecting ear seat group by bolts is symmetrically arranged at the middle and lower part of the side wall of the first baffle; walking wheels are installed at the bottom of both ends of the first baffle through hinge shafts; a placement box is provided between the two first baffles and is slidably connected and cooperated with the first baffles; a placement column is provided on one side of the bottom of the top plate, a columnar first inner groove is provided on the bottom surface of the placement column, a first spiral slide groove with a spiral end is provided in the first inner groove, and the upper and lower ends of the first spiral slide groove are connected by a vertical groove provided along the height direction of the first inner groove.

[0032] Slide blocks are symmetrically arranged on both sides of the placement box, and the slide blocks are slidably connected and cooperated with the first slide grooves opened on the first baffle along its height direction, and the sliding stroke of the placement box is equal to the sowing depth of the corn seeds; a placement cavity with a bottom through-hole is opened in the placement box, and a placement base plate is arranged on the side of the bottom of the placement cavity opposite to the first fixed rod; a fertilizer storage box fixed to the inner wall of the placement cavity is arranged above the placement base plate, and a discharge pipe groove extending outward is arranged on the side of the bottom of the fertilizer storage box close to the first fixed rod, and a slope for introducing fertilizer into the discharge pipe groove is arranged in the fertilizer storage box; a first feed pipe for replenishing fertilizer is arranged at one end of the fertilizer storage box and extends out of the placement box.

[0033] A first transmission shaft concentric with the discharge pipe groove is arranged in it, one end of the first transmission shaft extends upward out of the placement box and is installed with a placement column, the placement column is located in the first inner groove, a first shaft protrusion is arranged on the shaft body of the placement column, the first shaft protrusion is slidably connected and cooperated with the vertical groove and the first spiral slide groove; the first transmission shaft is provided with spiral blades on the shaft section located in the fertilizer storage box and the discharge pipe groove; the first transmission shaft is rotatably connected and cooperated with the placement box and the fertilizer storage box.

[0034] A seed box with a bottom that penetrates downward and fits with the inner wall of the placement cavity is provided on one side of the placement base plate, and guide blocks are symmetrically provided at both ends of the seed box, and the guide blocks are slidably connected and cooperated with the fourth slide groove provided on the end wall of the placement cavity; a sowing wheel that can seal the through hole at the bottom of the seed box is provided in the middle and lower part of the seed box, and the sowing wheel is rotatably connected and cooperated with the internal cavity of the seed box, and a seed groove for quantitatively guiding out the seeds is provided on the outer circular surface of the sowing wheel. A second transmission shaft concentric with the sowing wheel is provided on the sowing wheel, and both ends of the second transmission shaft extend out of the placement box through second slide grooves provided at the end walls of the placement box at both ends. A first gear is installed on the placement box, and the bottom of the first gear meshes with a second rack plate provided on the end wall of the placement box along its length direction for transmission; the second transmission shaft is slidably connected and cooperated with the second slide groove; a second feed pipe for supplementing corn seeds, which extends obliquely out of the placement box, is provided at one end of the seed box.

[0035] A first conical breaking plate is arranged on the side of the bottom of the seed box away from the mounting base, and the first conical breaking plate is mirrored with the second conical breaking plate arranged at the bottom of the mounting base; connecting plates that slide in contact with the top wall of the mounting base are symmetrically arranged at both ends of the side of the seed box close to the mounting base, and the positions of the two connecting plates correspond to the positions of the discharge pipe groove, and the two connecting plates are connected by a push plate, and a sealing plate is arranged on the top of the push plate for closing the bottom outlet of the discharge pipe groove.

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

[0037] A first ear seat is provided in the middle part of one side of the seed box away from the placement base plate, and a second ear seat is installed on the first ear seat through a hinge shaft and is rotatably connected to it. A driving rod is provided on the second ear seat, and one end of the driving rod extends to a sliding cavity opened in the placement tube and is installed with a first limiting ring. The first limiting ring is slidably connected to the sliding cavity, and a first spring is provided in the sliding cavity, and both ends of the first spring are respectively fixed to the end wall of the first limiting ring and the inner wall of the sliding cavity. Connecting columns perpendicular to the placement box are symmetrically arranged on both sides of the top of the placement box, and a top plate extending from one end of the connecting column is installed with a second limiting ring, and a second spring is sleeved on the shaft section of the connecting column between the top plate and the second limiting ring; a driving cylinder rotatably connected to the placement box is arranged at the bottom surface of the top plate, and a second inner groove is provided at the bottom of the driving cylinder, and a second spiral groove with one end spirally arranged and connected to the first position is provided in the second inner groove; a pressing shaft is arranged on the top surface of the placement box, and the pressing shaft is located in the second inner groove and slidably connected to the placement box, and a second shaft protrusion slidably connected to the second spiral groove is provided on the outer cylindrical surface of the pressing shaft.

[0038] When it is necessary to perform hole sowing operation on corn seeds, firstly, the first fixing rod and the second fixing rod of several hole sowing mechanisms are fixed to the first connecting ear seat group and the second connecting ear seat group respectively by bolts according to the spacing of corn sowing on the cultivated land; they are synchronously fixed to the agricultural machine by a three-point suspension mechanism; when the agricultural machine transports it to the cultivated land for sowing operation, the staff starts the motor, and the rotation of the motor power output shaft drives the driving cylinder to rotate, and the rotation of the driving cylinder drives the second shaft protrusion on the pressing shaft inside it to slide along the second spiral groove, and then the pressing shaft drives the placement box to move up and down reciprocatingly; wherein the placement box moves downward and then the first conical breaking plate and the second conical breaking plate maintain a vertical hole digging operation before the second gear meshes with the first rack plate, and when the placement box continues to move downward, 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 drives the seed box to move horizontally through the driving rod under the compensation of the first spring, thereby driving the second transmission shaft to move, and then the first gear The wheel meshes with the second rack plate and rotates, and the rotation of the second transmission shaft drives the sowing wheel to rotate, which can rotate the corn seeds in the seed trough to the bottom and fall to the first conical breaking plate and the second conical breaking plate. When the seed box moves, it can synchronously drive the first conical breaking plate to move to complete the hole digging operation; the synchronous seed box movement drives the push plate through the connecting plate to push out the fertilizer falling from the discharge pipe trough and drop it into the hole by the second conical breaking plate. At this time, the sealing plate moves synchronously to block the discharge pipe trough; when the placement box moves downward, the first shaft protrusion moves along the vertical groove, and the first transmission shaft does not rotate. When the placement box moves upward, the sealing plate is opened to close the sealing plate. At this time, the first shaft protrusion slides along the first spiral slide groove, and then the first transmission shaft and the spiral blade rotate, which can guide the fertilizer from the discharge pipe trough into the placement base plate and the two connecting plates, waiting for the next fertilizer push; wherein the bottom wall of the first baffle, the first conical breaking plate and the second conical breaking plate is slightly higher than the top wall of the corn sowing ridge body; wherein the second spring can assist the placement box to move up and reset.

[0039] With the acceleration of agricultural modernization and the improvement of people's requirements for the quality of agricultural products, the precision seeder with adjustable hole spacing will gradually become an important tool in agricultural production. In the future, we will continue to devote ourselves to the research and development of more efficient, intelligent and reliable seeding machinery to contribute to the sustainable development of agricultural production.

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figure 1-Figure 4 As shown, the present embodiment provides a precision seeder for crops with adjustable hole distance, comprising a traction frame 1, with connecting frames 3 slidably connected at 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 on both sides of the ground wheel 12, and 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 adjusting mechanism is installed in the transmission box 9, the adjusting mechanism is transmission-connected with an output shaft 13, the output shaft 13 extends out of the transmission box 9 and is fixedly connected with a sleeve 8, a connecting shaft 7 is slidably connected in the sleeve 8, and one end of the connecting shaft 7 away from the sleeve 8 is rotatably connected to the connecting frame 3, a hole-seeding wheel 5 is transmission-connected on the connecting shaft 7, one side of the hole-seeding wheel 5 is connected to a seed box 4, and a plurality of hole-forming devices 6 are circumferentially arranged on the hole-seeding wheel 5, and the hole-forming devices 6 are used for sowing.

[0043] When in use, the traction frame 1 is connected through an external driving device, and the ground wheel 12 contacts the ground. When the ground wheel 12 rotates, it drives the input shaft 10 to rotate. The input shaft 10 is transmitted to the output shaft 13 after the speed is changed by the adjustment mechanism. The output shaft 13 drives the sleeve 8 and the connecting shaft 7 to rotate, and the connecting shaft 7 drives the hole-casting wheel 5 to rotate. The hole-casting device 6 is extended into the soil, and the seeds in the seed box 4 fall into the hole-casting device 6 for sowing; the rotation speed of the output shaft 13 and the connecting shaft 7 is changed by the adjustment structure, so as to adjust the hole distance; the position of the connecting shaft 7 in the sleeve 8 is adjusted to adjust the spacing between the two hole-casting wheels 5, and then the row spacing is adjusted, so as to achieve the purpose of multiple adjustments, saving time and labor. The present invention can complete the adjustment of the hole distance without replacing the hole-casting device 6, is simple and convenient to operate, saves time, and can simultaneously adjust the distance between the two hole-casting wheels 5 and adjust the row spacing, so as to have a wide range of application and strong adjustability.

[0044] To further optimize the solution, the adjustment mechanism includes a sleeve 27 sleeved on the outside of the input shaft 10, and the first gear 18, the third gear 20 and the fifth gear 22 are respectively fixed to the sleeve 27. A transmission shaft 26 is provided below the input shaft 10, and the transmission shaft 26 is rotatably connected to the inner wall of the transmission box 9. The second gear 19, the fourth gear 21 and the sixth gear 23 are respectively fixed to the transmission shaft 26. When the first gear 18 is meshed with the second gear 19, the third gear 20 and the fourth gear 21, the fifth gear 22 and the sixth gear 23 are staggered. The seventh gear 24 is also fixed to the transmission shaft 26, and the seventh gear 24 is meshed with the eighth gear 25, and the eighth gear 25 is fixed to the output shaft 13. The input shaft 10 drives the shaft sleeve 27 to rotate, the shaft sleeve 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 is changed to achieve the purpose of adjusting the hole distance, which is easy to operate and saves time and effort.

[0045] In a further optimized solution, a plurality of telescopic components are arranged on the input shaft 10, a plurality of grooves are provided on the input shaft 10, the telescopic components are located in the grooves, a plurality of limiting holes 28 are provided on the shaft sleeve 27, and the telescopic components are matched with the limiting holes 28. The telescopic components extend into the limiting holes 28 to ensure that the shaft sleeve 27 rotates synchronously with the input shaft 10, and at the same time facilitate adjustment.

[0046] Further optimization scheme, the telescopic assembly includes a clamping rod 29, the clamping rod 29 is adapted to the limit hole 28, one end of the spring 30 is fixedly connected to the bottom of the clamping rod 29, and the other end of the spring 30 is fixedly connected to the inner wall of the groove. If the third gear 20 is to be meshed with the fourth gear 21, a long rod can be held and inserted into the limit hole 28 to resist the clamping rod 29, and pressed hard to retract the clamping rod 29 into the groove, and then the other hand holds another long rod to move the sleeve 27 to slide. When the sleeve 27 slides, the long rod in the limit hole 28 is retracted, and the sleeve 27 is continued to be moved until another limit hole 28 is located above the adjacent clamping rod 29. Under the action of the spring 30, the clamping rod 29 is extended and inserted into the limit hole 28. At this time, the third gear 20 is just meshed with the fourth gear 21, and the adjustment is completed.

[0047] In a further optimized solution, a limiting groove is provided on the side of the input shaft 10 away from the groove, a convex block is slidably connected in the limiting groove, and the convex block is fixedly connected to the inner wall of the sleeve 27. The setting of the limiting groove and the convex block can ensure that the sleeve 27 does not rotate when moving, ensuring the convenience of adjustment.

[0048] Further optimization scheme, the side wall of the transmission box 9 is provided with a through slot 31, and the through slot 31 is located at the same horizontal position as the input shaft 10. The setting of the through slot 31 is convenient for the long rod to extend into the transmission box 9, and it is convenient to observe the internal situation of the transmission box 9.

[0049] In a further optimized solution, the inner wall of the sleeve 8 is symmetrically provided with a slide groove 14, the inner wall of the slide groove 14 is slidably connected with a slider 15, and the slider 15 is fixedly connected to the connecting shaft 7. The setting of the slide groove 14 and the slider 15 limits the connecting shaft 7 to ensure that the connecting shaft 7 and the sleeve 8 rotate synchronously.

[0050] To further optimize the scheme, a plurality of threaded holes 16 are provided on the sleeve 8, and a limit screw 17 can be detachably connected in any threaded hole 16, and the limit screw 17 is hollow inside, and any slider 15 extends into the limit screw 17. When it is necessary to adjust the spacing between the two-hole broadcast wheels 5, the limit screw 17 is removed, and the slider 15 is not limited at this time, and the connecting shaft 7 can be moved to a suitable position in the sleeve 8, and the slider 15 also slides synchronously, and then the limit screw 17 is screwed into the threaded hole 16, and the limit screw 17 is just sleeved on the slider 15, so as to complete the limitation of the slider 15, and at the same time, the relative position of the connecting shaft 7 and the sleeve 8 is kept fixed, and the adjustment of the line spacing is completed.

[0051] Further optimization scheme, the two ends of the traction frame 1 are respectively fixed with a connecting tube 2, the end of the connecting frame 3 extends into the connecting tube 2 and is slidably connected with the connecting tube 2, and the limit structure in the connecting tube 2 is consistent with the structure in the sleeve 8. When the connecting shaft 7 and the sleeve 8 are adjusted, the connecting frame 3 and the connecting tube 2 are adjusted synchronously to ensure the stability of the overall structure.

[0052] In a further optimized solution, 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. The connecting plate 11 plays a fixing role on the transmission box 9, ensuring that the transmission box 9 is in a stable state.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A precision seeder for crops with adjustable hole spacing, characterized in that: The invention comprises a traction frame (1), wherein both ends of the traction frame (1) are respectively slidably connected to a connecting frame (3), a ground wheel (12) is provided below the traction frame (1), and input shafts (10) are respectively fixedly connected to both sides of the ground wheel (12), and 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), and an adjustment mechanism is installed in the transmission box (9), and the adjustment mechanism is rotatably connected to an output shaft (13), and the 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), one end of the connecting shaft (7) away from the sleeve (8) is rotatably connected to the connecting frame (3), a hole-seeding wheel (5) is drivingly connected to the connecting shaft (7), one side of the hole-seeding wheel (5) is connected to a seed box (4), a plurality of hole-forming devices (6) are circumferentially arranged on the hole-seeding wheel (5), and the hole-forming devices (6) are used for sowing.

2. The crop precision seeder with adjustable hole distance according to claim 1, characterized in that: The adjustment mechanism comprises a sleeve (27) sleeved on the outside of the input shaft (10), and the sleeve (27) is respectively fixedly connected with a first gear (18), a third gear (20) and a fifth gear (22); a transmission shaft (26) is provided below the input shaft (10), and the transmission shaft (26) is rotatably connected to the inner wall of the transmission box (9); the transmission shaft (26) is respectively fixedly connected with a second gear (19), a fourth gear (21) and a sixth gear (23); when the first gear (18) is meshed 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 staggered; a seventh gear (24) is also fixedly connected to the transmission shaft (26), and the seventh gear (24) is meshed with an eighth gear (25), and the eighth gear (25) is fixedly connected to the output shaft (13).

3. The crop precision seeder with adjustable hole distance according to claim 2, characterized in that: The input shaft (10) is provided with a plurality of telescopic components. The input shaft (10) is provided with a plurality of grooves. The telescopic components are located in the grooves. The shaft sleeve (27) is provided with a plurality of limiting holes (28). The telescopic components are matched with the limiting holes (28).

4. The crop precision seeder with adjustable hole distance according to claim 3, characterized in that: The telescopic assembly comprises a clamping rod (29), the clamping rod (29) is adapted to the limiting hole (28), one end of a spring (30) is fixedly connected to the bottom of the clamping rod (29), and the other end of the spring (30) is fixedly connected to the inner wall of the groove.

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

6. The crop precision seeder with adjustable hole distance according to claim 5, characterized in that: A through slot (31) is provided on the side wall of the transmission box (9), and the through slot (31) and the input shaft (10) are located at the same horizontal position.

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

8. The crop precision seeder with adjustable hole distance according to claim 7, characterized in that: The sleeve (8) is provided with a plurality of threaded holes (16), and a limit screw (17) is detachably connected to any of the threaded holes (16). The limit screw (17) is hollow inside, and any of the sliders (15) extends into the limit screw (17).

9. The crop precision seeder with adjustable hole distance according to claim 8, characterized in that: The two ends of the traction frame (1) are respectively fixedly connected with a connecting tube (2), the end of the connecting frame (3) extends into the connecting tube (2) and is slidably connected to the connecting tube (2), and the limiting structure in the connecting tube (2) is consistent with the structure in the sleeve (8).

10. The crop precision seeder with adjustable hole distance 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).

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