Wheat seeder

Abstract

The invention discloses a wheat seeding machine, which belongs to the field of wheat seeding and comprises a rack, a rotary tillage structure, a spiral earth leveler, a fertilization structure, a seeding structure and a pressing structure. The seeding position of each seeding structure strictly corresponds to the ridge bottom position formed by the spiral earth leveler and the fertilizing position of the fertilizing structure. The fertilizing structure and the sowing structure sequentially and accurately deliver fertilizer and seeds to the same ridge bottom position, it is ensured that the seeds directly fall into the low-lying position of the ridge bottom and coincide with the fertilizer in position, and the effect that the seeds and the fertilizer are in the same hole is formed. The terrain of the ridge bottom is low, moisture can be effectively accumulated, evaporation is reduced, and a stable humidity environment is provided for seed germination; fertilizer is intensively distributed around the seeds, volatilization and loss are avoided, the fertilizer efficiency is remarkably improved, and finally the seeds are compacted by the compacting structure to form a'loosening-ridge-fertilizer-seed-pressing 'complete seedbed, so that the seeding uniformity, the water and fertilizer utilization rate and the emergence rate are improved, and a foundation is laid for high and stable yield of wheat.

Description

Technical Field

[0001] The invention relates to the field of wheat combined sowing, in particular to a wheat seeder. Background Art

[0002] Wheat seeders are crucial for efficient seeding in modern agriculture. However, existing technologies often separate the ridging and sowing processes, making it difficult to integrate land preparation (rotary tillage and ridging), fertilization, sowing, and tamping into a continuous, coordinated, integrated operation. Traditional seeders typically utilize a split design, requiring replacement of the equipment for ridging and sowing after tilling. This results in low efficiency and inconsistent ridge shapes. Fertilization and sowing placement also lack precise alignment, leading to fertilizer spillage across the ridge surface and low utilization. Seeds, however, are not planted in the low-lying areas at the ridge bottom, resulting in poor water retention and uneven seedling emergence. Although some improved solutions have attempted to combine rotary tillage and sowing functions, they still cannot precisely match the ridge bottom position with the placement of seed and fertilizer, limiting the potential benefits of ridge cultivation in terms of water conservation and yield increase. Therefore, an integrated device that integrates the entire ridging and sowing process and ensures precise seed and fertilizer placement is urgently needed to improve operational efficiency and planting quality. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the traditional technology proposed in the background technology cannot achieve accurate matching of the ridge bottom position and the seed and fertilizer placement, which restricts the advantages of wheat ridge cultivation technology in saving water and increasing yield. A wheat seeder is designed.

[0004] The technical solution of the present invention to achieve the above-mentioned purpose is a wheat seeder, which includes a frame, a rotary tillage structure, an auger, a fertilizing structure, a sowing structure, and a pressing structure; The rotary tillage structure is installed on the frame and is used to crush the previous crop residues and soil clods and loosen the soil. The rotary tillage structure and the spiral soil leveler are driven by a chain; The spiral soil leveler is installed on the frame and is used to gather the loose soil after rotary tillage to the middle to form a ridge; The fertilizing structure is installed on the frame and is used to introduce fertilizer into the ridge bottom. The fertilizing structure and the sowing structure are driven by a chain; The sowing structure is mounted on the frame and is used to guide the seeds to the bottom of the ridge; The suppressing structure is installed on the frame and is used to compact the soil around the seed furrow and level the ridge surface. The sowing structure and the suppressing structure are driven by a chain; The rotary tillage structure, the auger, the fertilizing structure, the sowing structure and the pressing structure are located on the frame and arranged in sequence in the direction of travel during operation; The sowing position of each sowing structure corresponds to a ridge bottom position formed by the operation of an auger and a fertilizing position of a fertilizing structure.

[0005] Preferably, the rotary tillage structure includes a rotary tillage shell, a connecting bracket, a first gearbox, a first transmission gear, a rotary tillage shaft, and a rotary tillage blade. The connecting bracket is fixedly installed on the rotary tillage shell, the first gearbox is fixedly installed on the rotary tillage shell, the first gearbox has three output ends, one of the output ends of the first gearbox is located above the first gearbox and the first transmission gear is fixedly installed at the end, the first transmission gear and the spiral leveler are transmitted by a chain, the other two output ends of the first gearbox are located on both sides below the first gearbox and are on the same axis, the ends of the two rotary tillage shafts facing the center of the rotary tillage structure are respectively fixedly connected to the output ends below the first gearbox, the ends of the two rotary tillage shafts facing both sides of the rotary tillage structure are respectively rotatably connected to the rotary tillage shell, a plurality of rotary tillage blades are fixedly installed on the rotary tillage shaft, and the plurality of rotary tillage blades are equidistantly distributed on the rotary tillage shaft.

[0006] Preferably, the spiral soil leveler includes a support frame, a second gearbox, a driven gear, a spiral cutter shaft, and a spiral blade. Two lifting frames are fixedly installed on the frame, the support frame is fixedly installed below the lifting frame, the second gearbox is fixedly installed on the support frame, the second gearbox has two output ends, the input end of the second gearbox is located above the second gearbox and a driven gear is fixedly installed at the end, the driven gear and the rotary tillage structure are transmitted by a chain, the two output ends of the second gearbox are located on both sides below the second gearbox and are on the same axis, the ends of the two spiral cutter shafts facing the center of the support frame are respectively fixedly connected to the output end below a second gearbox, the ends of the two spiral cutter shafts facing outward are respectively rotatably connected to the support frame, the spiral blade is fixedly mounted on the spiral cutter shaft, and the spiral blades on the two spiral cutter shafts rotate in opposite directions, so as to gather the loose soil after rotary tillage to the middle.

[0007] Preferably, the fertilization structure includes a fertilizer box, a fertilizer dispenser, a fertilizer hose, a fertilizer positioning cylinder, and a second transmission gear. The fertilizer box is fixedly mounted on the frame, and there are multiple fertilizer dispensers below the fertilizer box. The multiple fertilizer dispensers are equidistantly distributed below the fertilizer box and fixedly connected to the fertilizer box. Each of the fertilizer dispensers corresponds to a fertilizer hose, and one end of the fertilizer hose is connected to the fertilizer dispenser. The fertilizer positioning cylinder is fixedly mounted on the frame. The number of the fertilizer positioning cylinders is consistent with the number of fertilizer dispensers, and the position of the fertilizer positioning cylinder is the fertilization position of the fertilization structure. The other end of each fertilizer hose is respectively inserted into a fertilizer positioning cylinder. The end of the drive shaft of the fertilizer dispenser is fixedly mounted with a second transmission gear, and the second transmission gear and the sowing structure are driven by a chain.

[0008] Preferably, the sowing structure includes a sowing box, a seeding device, a sowing hose, a sowing positioning cylinder, a furrow opener, a third transmission gear, and an adjusting mechanism. The sowing box is fixedly mounted on the frame, and multiple seeding devices are arranged below the sowing box. Multiple seeding devices are equidistantly distributed below the sowing box and fixedly connected to the sowing box. Each of the seeding devices is connected to a sowing hose. The sowing positioning cylinder is slidably mounted on the frame. The number of the sowing positioning cylinders is consistent with the number of the seeding devices, and the position of the sowing positioning cylinder is the sowing position of the sowing structure. The other end of the sowing hose is inserted into the sowing positioning cylinder, and a furrow opener is fixedly mounted below each of the sowing positioning cylinders. Two third transmission gears are fixedly mounted on the end of the transmission shaft of the seeding device, one of the third transmission gears and the fertilization structure are driven by a chain, and the other third transmission gear and the suppression structure are driven by a chain. The adjusting mechanism is mounted below the sowing box and connected to the sowing positioning cylinder.

[0009] Preferably, the adjusting mechanism includes a connecting shaft, a limiting mechanism, a first pulley, a second pulley, a linkage shaft, a cam, an adjusting frame, a guide groove, a clamping base, a connecting plate, and a clamping plate. The connecting shaft is rotatably mounted on the side of the sowing structure and the end extending out of the sowing box body is fixedly installed with a limiting mechanism. The connecting shaft is located inside the sowing box body and is fixedly mounted on a first pulley near the sowing box body. The first pulley is connected to the two second pulleys by a belt, and the two second pulleys are at the same horizontal height. Each of the second pulleys is fixedly mounted on a linkage shaft, and each of the two ends of the linkage shaft is rotatably mounted on the sowing box body. Each linkage shaft A cam is fixedly installed on each side, and a guide groove is provided on the adjusting frame. The number and position of the guide grooves correspond to the number and position of the cams. The outer contour of the cam is located in the guide groove provided on the adjusting frame. All the sowing positioning cylinders are fixedly installed on the adjusting frame, and a clamping base is welded on both sides of each of the sowing positioning cylinders on the frame. One end of the connecting plate is rotatably installed on the clamping base through a rotating shaft and a torsion spring is mounted on the rotating shaft. One end of the torsion spring is installed on the clamping base, and the other end is installed on the connecting plate. A clamping plate is fixedly installed on the upper end of the connecting plate, and the lower surface of the clamping plate is inclined upward from the position of the connecting plate toward the position of the sowing positioning cylinder.

[0010] Preferably, the limiting mechanism includes an adjusting handle, a limiting cap, a reset spring, and a slot. The adjusting handle is fixedly mounted on the connecting shaft, the limiting cap is slidably mounted on the adjusting handle and rotates with the rotation of the adjusting handle, the reset spring is located in the limiting cap and is sleeved on the adjusting handle, one end of the reset spring is mounted on the sowing box body, and the other end is mounted on the limiting cap. The sowing box body is provided with a plurality of slots equidistantly distributed in an annular shape with the connecting shaft as the center, and the limiting cap is inserted into the slot toward the side of the sowing box body.

[0011] Preferably, the limiting mechanism includes a servo motor and a protective shell. The protective shell is fixedly installed on the outside of the sowing box. The servo motor is fixedly installed in the protective shell and the output end is fixedly connected to the connecting shaft.

[0012] Preferably, the suppression structure includes a base plate, a connecting shell, a suppression roller, and a connecting gear. The two base plates are fixedly mounted on the frame, each base plate is fixedly mounted under a lifting frame, and each lifting frame is fixedly mounted with a connecting shell. The two connecting shells are rotatably mounted on both ends of the suppression roller, and a driving motor is provided inside one of the connecting shells, and the output end on one side of the driving motor is fixedly connected to the suppression roller, and the output end on the other side of the driving motor is fixedly mounted with a connecting gear, and the connecting gear and the sowing structure are driven by a chain.

[0013] Preferably, an opening and closing plate is provided on the rotary tillage shell, and one side of the opening and closing plate is hinged to the rotary tillage shell through a hinge.

[0014] In summary, the present invention provides a wheat seeder with the following beneficial effects: First, the sowing position of each sowing structure is strictly aligned with the ridge bottom position formed by the spiral leveler and the fertilization position of the fertilization structure. This ensures that the seeds fall directly into the low-lying area at the bottom of the ridge and coincide with the position of the fertilizer, forming a "seed and fertilizer in the same hole" effect. The ridge bottom is low in elevation, which can effectively accumulate water, reduce evaporation, and provide a stable humidity environment for seed germination; the fertilizer is concentrated around the seeds to avoid volatilization and loss, significantly improving fertilizer efficiency; Secondly, from rotary tillage and soil leveling to fertilization, sowing, and compaction, each structure is powered by a chain drive to ensure operational continuity. After the rotary tillage structure crushes the soil, the reverse spiral blades of the spiral leveler push the soil toward the center to form a uniform ridge. The reverse spiral design of the spiral leveler is suitable for clay, sand, and high-humidity soils, avoiding the clogging problem of traditional plows. The fertilization and sowing structures sequentially deliver fertilizer and seeds precisely to the same ridge bottom position, and finally the compaction structure compacts the soil, forming a complete seed bed of "loosening-ridge-fertilizing-seeding-compacting"; In summary, the present invention solves the problems of seed and fertilizer separation and position deviation of traditional seeders, improves sowing uniformity, water and fertilizer utilization rate and seedling emergence rate, and lays the foundation for high and stable wheat yields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention; Figure 2 is a bottom-up three-dimensional structural diagram of the first embodiment of the present invention; Figure 3 is a front structural diagram of the first embodiment of the present invention; Figure 4 is a bottom view structural diagram of the first embodiment of the present invention; Figure 5 is a schematic side structural diagram of the first embodiment of the present invention; Figure 6 The present invention Figure 1 A schematic diagram of the structure of the lifting frame shown at A; Figure 7 The present invention Figure 2 A schematic diagram of the structure of the regulating mechanism shown at A; Figure 8 It is a structural diagram of the sowing positioning cylinder of the present invention; Figure 9 is a cross-sectional view of the limiting mechanism in the first embodiment of the present invention; Figure 10 is a schematic diagram of the three-dimensional structure of the limiting mechanism in the first embodiment of the present invention; Figure 11 is a structural diagram of the suppression structure in the first embodiment of the present invention; Figure 12 It is a cross-sectional view of the limiting structure in the second embodiment of the present invention.

[0016] In the figure, 1, frame; 2, rotary tillage structure; 3, spiral soil leveler; 4, fertilizing structure; 5, sowing structure; 6, suppression structure; 7, opening and closing plate; 21, rotary tillage shell; 22, connecting bracket; 23, first gearbox; 24, first transmission gear; 25, rotary tillage shaft; 26, rotary tillage blade; 31, support frame; 32, second gearbox; 33, driven gear; 34, spiral cutter shaft; 35, spiral blade; 41, fertilizing box; 42, fertilizer dispenser; 43, fertilizer hose; 44, fertilizer positioning cylinder; 45, second transmission gear; 51, sowing box; 52, seed dispenser; 53, sowing hose; 54, Seeding positioning cylinder; 55. Furrow opener; 56. Third transmission gear; 57. Adjusting mechanism; 571. Connecting shaft; 572. Limiting mechanism; 573. First pulley; 574. Second pulley; 575. Linking shaft; 576. Cam; 577. Adjusting frame; 578. Guide groove; 57a. Clamping base; 57b. Connecting plate; 57c. Clamping plate; 5721. Adjusting handle; 5722. Limiting cap; 5723. Reset spring; 5724. Slot; 5725. Servo motor; 5726. Protective housing; 61. Bottom plate; 62. Connecting housing; 63. Pressing roller; 64. Connecting gear. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "set / mounted," "sleeved," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. First embodiment

[0020] See also Figure 1 and Figure 3 The present invention provides a technical solution: a wheat seeder, comprising a frame 1, a rotary tillage structure 2, an auger 3, a fertilizing structure 4, a sowing structure 5, and a suppressing structure 6. The rotary tillage structure 2 is fixedly mounted at the rightmost end of the frame 1, and the rotary tillage structure 2 and the auger 3 are driven by a chain.

[0021] When working, the rotary tillage structure 2 located at the far right end completely crushes the previous crop residues and soil clods, loosens the soil, improves air permeability and water retention, and creates a flat seed bed for subsequent fertilization and sowing. The gearbox of the rotary tillage structure 2 drives the transmission of the spiral leveler 3 through a chain during operation.

[0022] See also Figure 2 The auger 3 is located on the left side of the rotary tillage structure 2 and is fixedly mounted on the frame 1. The ridge bottom position formed by each auger 3 during operation corresponds to the fertilization position of a fertilization structure 4, so that subsequent fertilization can be directly applied at the formed ridge bottom position.

[0023] During operation, the auger 3 gathers loose soil from rotary tillage toward the center. Its blades rotate in opposite directions (left and right). This counter-rotating design pushes soil from both sides toward the center, continuously piling it up as it goes, forming a ridge. This design is suitable for a variety of soil types, including clay and sand. Even when the soil is moist (such as after rain), ridge formation remains effective, avoiding the clogged soil and clogging issues associated with traditional plows.

[0024] See also Figure 4 The fertilizing structure 4 is located on the left side of the auger 3 and is fixedly mounted on the frame 1. The fertilizing structure 4 and the sowing structure 5 are driven by a chain. The fertilizing position of each fertilizing structure 4 corresponds to the sowing position of each sowing structure 5. The fertilizing structure 4 adopts an outer groove wheel type fertilizer discharger.

[0025] During operation, the sowing structure 5 transmits power to the fertilizer dispenser in the fertilizing structure 4 through a chain, driving the fertilizer dispenser to operate. The fertilizer dispenser drops the fertilizer in the box into the bottom of the ridge through the fertilizer guide pipe to prevent the fertilizer from volatilizing and losing.

[0026] The sowing structure 5 is located on the left side of the fertilizing structure 4 and is fixedly mounted on the frame 1. The sowing structure 5 adopts an outer groove wheel type seed metering device.

[0027] During operation, the suppression structure 6 transmits power to the seed meter of the sowing structure 5 through a chain, driving the seed meter. The seed meter drops the seeds in the box through a hose to the bottom of the ridge. Wheat planting requires consideration of moisture conditions. The lower ground at the bottom of the ridge can better retain moisture, reduce evaporation, and promote seed germination and seedling growth.

[0028] See also Figure 5 , the suppression structure 6 is located at the leftmost end of the frame 1 and is fixedly mounted on the frame 1. The sowing structure 5 and the suppression structure 6 are driven by a chain.

[0029] The final component of the present invention is the suppressing mechanism 6. During operation, the motor within this mechanism drives one end of a chain through a gear, which then moves around the gear. This chain then transmits power to the seeding mechanism 5 at the other end. The suppressing wheel, constructed of cast iron, compacts the soil around the seed furrow, ensuring close contact between the seeds and the soil to promote water absorption and germination. It also smoothes the ridge surface, facilitating subsequent field management (such as irrigation and spraying).

[0030] The rotary tillage structure 2, the spiral leveler 3, the fertilizing structure 4, the sowing structure 5 and the suppression structure 6 are located on the frame 1 and are arranged in sequence from right to left. The sowing position of each sowing structure 5 corresponds to a ridge bottom position formed by an spiral leveler 3 during operation and a fertilizing position of a fertilizing structure 4, so that the fertilizing structure 4 and the sowing structure 5 can guide fertilizers and seeds to the ridge bottom.

[0031] In the present invention, the power for the rotary tillage structure 2 and the auger 3 is provided by a tractor. The tractor drives the input end of the gearbox in the rotary tillage structure 2 to rotate, thereby driving the rotary tillage structure 2 to operate. The rotary tillage structure 2 will thoroughly crush the stubble and soil clods of the previous crop, loosen the soil, improve air permeability and water retention, and create a flat seed bed for subsequent fertilization and sowing. During operation, the gearbox of the rotary tillage structure 2 drives the transmission of the auger 3 through a chain to drive the auger 3 to operate. The auger 3 gathers the loose soil after rotary tillage to the middle part, and the blades of the auger 3 spiral in opposite directions to push the soil on both sides toward the center, and continuously pile up during the process to form a ridge.

[0032] The fertilizing structure 4, sowing structure 5, and suppression structure 6 of the present invention are powered by a power motor in the suppression structure 6. The motor in the suppression structure 6, while driving the suppression structure 6 itself, transmits power to the sowing structure 5 via a chain. The sowing structure 5 then transmits the power to the fertilizing structure 4 via a chain. Each fertilizing position in the fertilizing structure 4 corresponds to a ridge bottom position formed by the auger 3. This allows the fertilizing structure 4 to precisely deposit fertilizer at the ridge bottom, preventing fertilizer volatilization and loss. The sowing structure 5 deposits seeds at the ridge bottom. Because each sowing position in the sowing structure 5 corresponds to a ridge bottom position formed by the auger 3, seeds can be more accurately deposited at the ridge bottom. The ridge bottom is lower, better conserving moisture and reducing evaporation, which is beneficial for seed germination and seedling growth. Finally, the suppression structure 6 compacts the soil, ensuring close contact between the seeds and the soil to promote water absorption and germination while also smoothing the ridge surface, facilitating subsequent field management (such as irrigation and spraying).

[0033] The rotary tilling mechanism 2 comprises a rotary tilling housing 21, a connecting bracket 22, a first gearbox 23, a first transmission gear 24, a rotary tiller shaft 25, and rotary tiller blades 26. The connecting bracket 22 is fixedly mounted at the center of the rotary tilling housing 21. The first gearbox 23 is fixedly mounted at the center of the rotary tilling housing 21. The first gearbox 23 has three output terminals. One of the output terminals is located above the first gearbox 23, with the first transmission gear 24 fixedly mounted at its end. The first transmission gear 24 is connected to the auger 3 via a chain drive. The other two output terminals of the first gearbox 23 are located on either side of the lower portion of the first gearbox 23 and are coaxial. The ends of the two rotary tiller shafts 25 facing the center of the rotary tilling mechanism 2 are fixedly connected to the output terminals below the first gearbox 23. The ends of the two rotary tiller shafts 25 facing either side of the rotary tilling mechanism 2 are rotatably connected to the rotary tilling housing 21. Multiple rotary tiller blades 26 are fixedly mounted on the rotary tiller shaft 25, and are evenly spaced.

[0034] During operation, the connecting bracket 22 provides a position for the rotary tillage structure 2 to be connected to the tractor, so that the tractor can simultaneously drive the rotary tillage structure 2 to move when moving, and thus the entire structure of the present invention can move along the moving trajectory of the tractor.

[0035] The tractor drives the input end of the first gearbox 23, which in turn drives the three output ends to rotate simultaneously. The output end located above the first gearbox 23 drives the first transmission gear 24. The rotation of the first transmission gear 24 drives one end of a chain engaged with the first transmission gear 24 to rotate around the first transmission gear 24, transmitting power to the auger 3 at the other end of the chain, driving the auger 3. The two output ends located below the first gearbox 23 rotate, driving the tiller shaft 25 within the tiller housing 21. This rotation drives the tiller blades 26 around the shaft 25, thoroughly breaking up crop residue and clods from the previous crop, loosening the soil, improving its air permeability and water retention, and creating a smooth seedbed for subsequent fertilization and sowing.

[0036] See also Figure 1 The rotary tillage shell 21 is provided with an opening and closing plate 7, one side of the opening and closing plate 7 is hinged to the rotary tillage shell 21 by a hinge. When the rotary tillage shaft 25 and the rotary tillage blade 26 need to be repaired or replaced, the opening and closing plate 21 can be opened on the rotary tillage shell 21 by the hinge, which is convenient for maintenance personnel to check and work.

[0037] See also Figure 2 and Figure 6 The auger 3 comprises a support frame 31, a second gearbox 32, a driven gear 33, a spiral cutter shaft 34, and a spiral blade 35. Two lifting frames are fixedly mounted on the frame 1, with the support frame 31 fixedly mounted below the lifting frames. The lifting frames are used to adjust the height of the support frame 31 and, in turn, the spiral blade 35 by rotating a rotatable handle located above the lifting frames, a technique commonly used by those skilled in the art. The second gearbox 32 is fixedly mounted at the center of the support frame 31. The second gearbox 32 has two output ends. The input end is located above the second gearbox 32, and a driven gear 33 is fixedly mounted at the end. The driven gear 33 is connected to the rotary tillage mechanism 2 via a chain drive. The two output ends of the second gearbox 32 are located on either side below the second gearbox 32 and are coaxial. The two spiral cutter shafts 34 have their ends facing the center of the support frame 31 fixedly connected to an output end below the second gearbox 32, while their ends facing outward are rotatably connected to the support frame 31. The spiral blade 35 is fixedly mounted on the spiral cutter shaft 34. The spiral blades 35 on the two spiral cutter shafts 34 rotate in opposite directions and are used to gather the loose soil after rotary tillage to the middle.

[0038] During operation, the rotary tillage structure 2 transmits power to the driven gear 33 via a chain, driving the driven gear 33 to rotate. The rotation of the driven gear 33 drives the input end of the second gearbox 32 to rotate. The rotation of the input end of the second gearbox 32 drives the two output ends below the second gearbox 32 to rotate. The rotation of the two output ends below the second gearbox 32 drives the spiral cutter shaft 34 to rotate on the support frame 31. The rotation of the spiral cutter shaft 34 drives the spiral blade 35 to rotate. The spiral blades 35 on the two spiral cutter shafts 34 rotate in opposite directions, gathering the loose soil after rotary tillage to the middle. The reverse spiral design pushes the soil on both sides toward the center and continuously piles up during the movement to form a ridge.

[0039] The fertilization structure 4 includes a fertilization box 41, a fertilizer dispenser 42, a fertilizer hose 43, a fertilizer positioning cylinder 44, and a second transmission gear 45. The fertilization box 41 is fixedly mounted on the frame 1. A plurality of fertilizer dispensers 42 are installed below the fertilization box 41. The plurality of fertilizer dispensers 42 are evenly distributed below the fertilization box 41 and are fixedly connected to the fertilization box 41. Each fertilizer dispenser 42 corresponds to a fertilizer hose 43, and one end of the fertilizer hose 43 is connected to the fertilizer dispenser 42. The fertilizer positioning cylinder 44 is fixedly mounted on the frame 1. The number of fertilizer positioning cylinders 44 is the same as the number of fertilizer dispensers 42, and the position of the fertilizer positioning cylinder 44 is the fertilizer application position of the fertilization structure 4. The other end of each fertilizer hose 43 is respectively inserted into a fertilizer positioning cylinder 44. A second transmission gear 45 is fixedly mounted on the end of the transmission shaft of the fertilizer dispenser 42, and the second transmission gear 45 is connected to the sowing structure 5 through a chain transmission.

[0040] During operation, the sowing structure 5 transmits power to the second transmission gear 45 via a chain. The operation of the second transmission gear 45 drives the fertilizer dispenser 42 to operate. The fertilizer dispenser 42 introduces the fertilizer in the fertilizer box 41 into the soil through the fertilizer hose 43. The fertilizer positioning pipe 44 accurately positions the outlet position of the fertilizer hose 43 at the bottom of the ridge to prevent the volatilization and loss of fertilizer.

[0041] The sowing mechanism 5 comprises a sowing housing 51, a seeding device 52, a sowing hose 53, a sowing positioning cylinder 54, a furrow opener 55, a third transmission gear 56, and an adjustment mechanism 57. The sowing housing 51 is fixedly mounted on the frame 1. Multiple seeding devices 52 are mounted below the sowing housing 51. These devices are evenly spaced and fixedly connected to the sowing housing 51. Each seeding device 52 is connected to a sowing hose 53. The sowing positioning cylinder 54 is slidably mounted on the frame 1. The number of sowing positioning cylinders 54 matches the number of seeding devices 52, and their positions determine the sowing position of the sowing mechanism 5. The other end of the sowing hose 53 is inserted into the sowing positioning cylinder 54. A furrow opener 55 is fixedly mounted below each sowing positioning cylinder 54. Two third transmission gears 56 are fixedly mounted at the end of the drive shaft of the seeding device 52. One of the third transmission gears 56 is chain-driven to the fertilizing mechanism 4, while the other is chain-driven to the suppression mechanism 6. The adjusting mechanism 57 is installed below the sowing box 51 and is connected to the sowing positioning cylinder 54 . The adjusting mechanism 57 is used to adjust the height of the sowing positioning cylinder 54 .

[0042] Before work, the depth of sowing can be adjusted using the adjusting mechanism 57 to adjust the height of the sowing positioning cylinder 54. When the height of the sowing positioning cylinder 54 is adjusted, the height of the furrow opener 55 is driven to change simultaneously, thus completing the adjustment of the sowing depth.

[0043] During operation, the suppression structure 6 transmits power via a chain to the third transmission gear 56. The rotation of the third transmission gear 56 drives the seed meter 52. The seed meter 52 directs the seeds from the seeding box 51 into the seeding positioning cylinder 54 via the seeding hose 53. The furrow opener 55 located on the seeding positioning cylinder 54 creates a seed furrow at the bottom of the ridge, allowing the seeds to fall into the seed furrow.

[0044] See also Figure 7The adjustment mechanism 57 includes a connecting shaft 571, a limiting mechanism 572, a first pulley 573, a second pulley 574, a linkage shaft 575, a cam 576, an adjustment frame 577, a guide slot 578, a clamping base 57a, a connecting plate 57b, and a clamping plate 57c. The connecting shaft 571 is rotatably mounted on the side of the sowing structure 5. The end extending beyond the sowing box 51 is fixedly mounted with a limiting mechanism 572. The limiting mechanism 572 is used to drive the connecting shaft 571 in rotation and to limit the position of the connecting shaft 571 when it stops rotating. The connecting shaft 571 is located inside the sowing box 51, near one side thereof, and is fixedly mounted with a first pulley 573. The first pulley 573 is connected to two second pulleys 574 via a belt. The two second pulleys 574 are at the same horizontal level, and each second pulley 574 is fixedly mounted to a linkage shaft 575. Both ends of each linkage shaft 575 are rotatably mounted to the sowing box 51. A cam 576 is fixedly mounted on each side of each linkage shaft 575. The adjustment frame 577 is provided with guide slots 578, the number and position of which correspond to the number and position of the cams 576. The outer contours of the cams 576 are positioned within the guide slots 578 provided on the adjustment frame 577. All seeding positioning cylinders 54 are fixedly mounted on the adjustment frame 577.

[0045] To adjust the sowing depth, the limiting mechanism 572 drives the connecting shaft 571 to rotate, which in turn drives the first pulley 573 to rotate. The rotation of the first pulley 573 transmits power via a belt to the second pulley 574, which in turn drives the second pulley 574 to rotate. The rotation of the second pulley 574 drives the linkage shaft 575 to rotate, which in turn drives the cam 576 to rotate. The outer contour of the cam 576 is located within the guide groove 578 defined in the adjustment frame 577. As the cam 576 rotates, its outer contour remains within the guide groove, causing the height of the adjustment frame 577 to change. This height change in the adjustment frame 577 drives the height of all the sowing positioning cylinders 54 connected to it to change as well. Once the desired height is reached, the limiting mechanism 572 limits the rotation of the connecting shaft 571, completing the sowing depth adjustment.

[0046] See also Figure 8 Each sowing positioning cylinder 54 has a clamping base 57a welded to the frame 1 on either side. A connecting plate 57b is pivotally mounted on the clamping base 57a via a rotating shaft. A torsion spring is mounted on the rotating shaft. One end of the torsion spring is mounted on the clamping base 57a, and the other end is mounted on the connecting plate 57b. A clamping plate 57c is fixedly mounted on the upper end of the connecting plate 57b. The lower surface of the clamping plate 57c slopes upward from the connecting plate 57b toward the sowing positioning cylinder 54.

[0047] When the cam 576 drives the sowing positioning cylinder 54 to its highest position, it lifts the inclined surface at the bottom of the clamping plate 57c, causing the two clamping plates 57c on either side of the same sowing positioning cylinder 54 to move toward each other. At this point, the sowing hose 53 can be inserted into the sowing positioning cylinder 54. When the sowing positioning cylinder 54 moves downward and is no longer at its highest position, the torsion spring drives the connecting plate 57b on the clamping base 57a back into place. The return of the connecting plate 57b also drives the return of the clamping plate 57c, securing the sowing hose 53. This prevents the sowing hose 57c from separating from the sowing positioning cylinder 54 due to vibration or other factors during operation, thus maintaining stability during sowing.

[0048] See also Figure 9 and Figure 10 The limiting mechanism 572 includes an adjustment handle 5721, a limiting cap 5722, a return spring 5723, and a retaining slot 5724. The adjustment handle is fixedly mounted on the connecting shaft 571, while the limiting cap 5722 is slidably mounted on the adjustment handle 5721. The adjustment handle 5721 has multiple protrusions that limit the sliding movement of the limiting cap 5722, allowing the limiting cap 5722 to rotate with the rotation of the adjustment handle 5721. The return spring 5723 is located within the limiting cap 5722 and fits over the adjustment handle 5721. A rotatable plate is mounted on the side of the adjustment handle 5721 facing the return spring 5723. One end of the return spring 5723 is fixedly mounted on the seeding box 51, while the other end is fixedly mounted on the rotatable plate in the limiting cap 5722. The seeding box 51 is provided with a plurality of retaining slots 5724 equidistantly distributed in a circle around the connecting shaft 571. The limiting cap 5722 is inserted into the card slot 5724 toward the side of the sowing box body 51.

[0049] When rotating the connecting shaft 571, first pull out the limiting cap 5722 to the outside so that the end of the limiting cap 5722 is no longer inserted into the slot 5724. At this time, manually rotate the adjustment handle 5721 on the connecting shaft 571 to drive the connecting shaft 571 to rotate and complete the adjustment of the sowing depth.

[0050] When the sowing depth is adjusted, the limiting cap 5722 is loosened, and the reset spring 5723 drives the limiting cap 5722 to be reinserted into the slot 5724 provided on the sowing box body 51 , thereby completing the rotation limit of the connecting shaft 571 .

[0051] See also Figure 11The suppression structure 6 includes a base plate 61, a connecting shell 62, a suppression roller 63, and a connecting gear 64. The two base plates 61 are fixedly installed on both sides of the leftmost end of the frame 1. A lifting frame is fixedly installed on each base plate 61, and a connecting shell 62 is fixedly installed on the side of each lifting frame. The function of the lifting frame is to rotate the rotatable handle located above the lifting frame to adjust the height of the suppression roller 63, which is a technical means commonly used by those skilled in the art. The two connecting shells 62 are rotatably installed on both ends of the suppression roller 63, respectively. A driving motor is provided inside one of the connecting shells 62, and the output end of one side of the driving motor is fixedly installed on the suppression roller 63. A connecting gear 64 is fixedly installed on the output end of the other side of the driving motor, and the connecting gear 64 and the third gear are driven by a chain.

[0052] During operation, a drive motor located within the connecting housing 62 drives the pressing roller 63 and connecting gear 64 to rotate simultaneously. This rotation of the connecting gear 64 drives one end of a chain engaged with the connecting gear 64 to rotate around the connecting gear 64. This power is then transmitted to the seeding structure 5 at the other end of the chain, driving the seeding structure 5. The rotation of the pressing roller 63 compacts the soil, ensuring close contact between the seeds and the soil to promote water absorption and germination, while also smoothing the ridge surface and facilitating subsequent field management (such as irrigation and spraying).

[0053] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and appropriate controllers should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, in which the electrical components are electrically connected in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0054] In the first embodiment of the present invention: before work, the connecting bracket 22 is used to provide a position for the rotary tillage structure 2 to be connected to the tractor, so that the tractor can simultaneously drive the rotary tillage structure 2 to move when moving, and thus the overall structure of the present invention can move along the moving trajectory of the tractor.

[0055] Before operation, the height of the sowing positioning cylinder 54 can be adjusted using the adjustment mechanism 57 according to the desired sowing depth. The limiting mechanism 572 drives the connecting shaft 571 to rotate, which in turn drives the first pulley 573 to rotate. The first pulley 573 rotates, transferring power via a belt to the second pulley 574, which in turn drives the second pulley 574 to rotate. The rotation of the second pulley 574 drives the linkage shaft 575 to rotate, which in turn drives the cam 576 to rotate. The outer contour of the cam 576 is located within a guide groove 578 provided on the adjustment frame 577. As the cam 576 rotates, its outer contour remains within the guide groove, causing the height of the adjustment frame 577 to change.

[0056] The height change of the adjustment frame 577 drives the height change of all the sowing positioning cylinders 54 connected to the adjustment frame 577. After the height reaches the requirement, the limit mechanism 572 limits the rotation of the connecting shaft 571 to complete the positioning of the sowing depth.

[0057] At the same time, when the cam 576 drives the sowing positioning cylinder 54 to its highest position, the sowing positioning cylinder 54 will lift the inclined surface at the bottom of the clamping plate 57c, causing the two clamping plates 57c on both sides of the same sowing positioning cylinder 54 to move to the sides. At this time, the sowing hose 53 can be inserted into the sowing positioning cylinder 54. When the sowing positioning cylinder 54 moves downward and is no longer in the highest position, the torsion spring drives the connecting plate 57b located on the clamping base 57a to reset. The reset of the connecting plate 57b drives the reset of the clamping plate 57c to secure the sowing hose 53, preventing the sowing hose 57c from detaching from the sowing positioning cylinder 54 due to vibration or other reasons during the operation of the present invention, thereby maintaining the stability of the sowing operation. When the height of the sowing positioning cylinder 54 is adjusted, the height of the furrow opener 55 will also change simultaneously, completing the adjustment of the sowing depth.

[0058] In the present invention, the power for the rotary tillage mechanism 2 and the auger 3 is provided by a tractor. During operation, the tractor rotates the input end of the first gearbox 23 in the rotary tillage mechanism 2, thereby driving the three output ends to rotate simultaneously. The output end, located above the first gearbox 23, rotates the first transmission gear 24. This rotation drives one end of a chain engaged with the first transmission gear 24 around the first transmission gear 24, which in turn transmits power to the second gearbox 32 at the other end of the chain, driving the auger 3.

[0059] The two output ends located below the first gearbox 23 rotate to drive the rotary tillage shaft 25 to rotate in the rotary tillage housing 21. The rotation of the rotary tillage shaft 25 drives the rotary tillage blades 26 to rotate around the rotary tillage shaft 25, completing the work of thoroughly crushing the previous crop residues and soil blocks, loosening the soil, and creating a flat seed bed for subsequent fertilization and sowing.

[0060] The second gearbox 32 transmits power to the driven gear 33 via a chain, driving the two output terminals below the second gearbox 32 to rotate. The rotation of the two output terminals below the second gearbox 32 drives the spiral cutter shaft 34 on the support frame 31. The rotation of the spiral cutter shaft 34 drives the spiral blades 35. The spiral blades 35 on both spiral cutter shafts 34 rotate toward the center, gathering the loose soil after rotary tillage toward the center. The reverse spiral design pushes the soil on both sides toward the center, and the soil is continuously piled up as it moves, forming a ridge.

[0061] In the present invention, the power of the fertilizing structure 4, the sowing structure 5 and the suppressing structure 6 is provided by the power motor in the suppressing structure 6. The power motor in the connecting housing 62 drives the connecting gear 64 to rotate, and drives the seed metering device 52 in the sowing structure 5 and the fertilizer metering device 4 in the fertilizing structure 4 through the chain transmission.

[0062] The fertilizer discharger 42 introduces the fertilizer in the fertilizer box 41 into the soil through the fertilizer discharge hose 43, and the fertilizer discharge positioning pipe 44 accurately positions the outlet position of the fertilizer discharge hose 43 at the bottom of the ridge to prevent the fertilizer from volatilizing and losing.

[0063] The seed meter 52 is operated to introduce the seeds in the seeding box 51 into the seeding positioning cylinder 54 through the seeding hose 53. The furrow opener 55 located on the seeding positioning cylinder 54 opens a seed furrow in the ridge bottom, allowing the seeds to fall into the seed furrow.

[0064] Since each sowing position of the sowing structure 5 corresponds to the bottom position of a ridge formed by the working of the auger 3, the seeds can be dropped more accurately to the bottom position of the ridge. The ridge bottom is lower, which can better preserve water, reduce evaporation, and is conducive to seed germination and seedling growth.

[0065] Finally, the pressing roller 62 of the pressing structure 6 rotates to compact the soil, ensuring close contact between the seeds and the soil to promote water absorption and germination while leveling the ridge surface, providing convenience for subsequent field management (such as irrigation and spraying). Second embodiment

[0066] See also Figure 12 , in the second embodiment of the present invention: In the first embodiment, the sowing depth needs to be adjusted manually. The difference between the second embodiment and the first embodiment is that the limiting mechanism 572 includes a servo motor 5725 and a protective shell 5726. The protective shell 5726 is fixedly installed on the outside of the sowing box 51, and the servo motor 5725 is fixedly installed in the protective shell 5726 and the output end is fixedly connected to the connecting shaft 571. When the connecting shaft 571 is rotated, the servo motor 5725 located in the protective shell 5726 is directly started to drive the connecting shaft 571. At this time, the connecting shaft 571 rotates to complete the adjustment of the sowing depth. The servo motor 5725 is a servo motor with an electromagnetic brake, which can automatically lock the output shaft after power failure to complete the limit of the rotation of the connecting shaft 571.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wheat seeder, characterized in that: It includes a frame (1), a rotary tillage structure (2), an auger (3), a fertilizing structure (4), a sowing structure (5), and a suppressing structure (6); The rotary tillage structure (2) is mounted on the frame (1) and is used to crush the previous crop residues and soil clods and loosen the soil. The rotary tillage structure (2) and the spiral soil leveler (3) are driven by a chain. The spiral soil leveler (3) is mounted on the frame (1) and is used to gather the loose soil after rotary tillage to the middle to form a ridge; The fertilizing structure (4) is mounted on the frame (1) and is used to introduce fertilizer into the bottom of the ridge. The fertilizing structure (4) and the sowing structure (5) are driven by a chain. The sowing structure (5) is mounted on the frame (1) and is used to guide the seeds to the bottom of the ridge; The suppressing structure (6) is mounted on the frame (1) and is used to compact the soil around the seed furrow and level the ridge surface. The sowing structure (5) and the suppressing structure (6) are driven by a chain. The rotary tillage structure (2), the spiral soil leveler (3), the fertilizing structure (4), the sowing structure (5) and the suppressing structure (6) are located on the frame (1) and are arranged in sequence in the direction of travel during operation; The sowing position of each sowing structure (5) corresponds to a ridge bottom position formed during the operation of an auger (3) and a fertilizing position of a fertilizing structure (4).

2. The wheat seeder according to claim 1, characterized in that: The rotary tillage structure (2) comprises a rotary tillage housing (21), a connecting bracket (22), a first gearbox (23), a first transmission gear (24), a rotary tillage blade shaft (25), and a rotary tillage blade (26). The connecting bracket (22) is fixedly mounted on the rotary tillage housing (21). The first gearbox (23) is fixedly mounted on the rotary tillage housing (21). The first gearbox (23) has three output ends. One of the output ends of the first gearbox (23) is located above the first gearbox (23) and has a first transmission gear (24) fixedly mounted at the end. The first transmission gear (24) is connected to the spiral tillage blade (26). The device (3) is driven by a chain, the other two output ends of the first gearbox (23) are located at two sides below the first gearbox (23) and on the same axis, one end of the two rotary tiller shafts (25) facing the center of the rotary tiller structure (2) is fixedly connected to an output end below the first gearbox (23), and one end of the two rotary tiller shafts (25) facing two sides of the rotary tiller structure (2) is rotatably connected to the rotary tiller housing (21), and a plurality of rotary tiller blades (26) are fixedly mounted on the rotary tiller shaft (25), and the plurality of rotary tiller blades (26) are equidistantly distributed on the rotary tiller shaft (25).

3. The wheat seeder according to claim 1, characterized in that: The spiral soil leveler (3) comprises a support frame (31), a second gearbox (32), a driven gear (33), a spiral cutter shaft (34), and a spiral blade (35). Two lifting frames are fixedly mounted on the frame (1). The support frame (31) is fixedly mounted below the lifting frame. The second gearbox (32) is fixedly mounted on the support frame (31). The second gearbox (32) has two output ends. The input end of the second gearbox (32) is located above the second gearbox (32) and a driven gear (33) is fixedly mounted at the end. The driven gear (33) is connected to the rotary tillage structure (2) through a chain. The invention relates to a transmission system comprising a plurality of spiral blades (35) and a plurality of spiral cutter shafts (34). The plurality of spiral blades (35) are connected to the ...

4. The wheat seeder according to claim 1, characterized in that: The fertilizing structure (4) includes a fertilizing box (41), a fertilizer dispenser (42), a fertilizer hose (43), a fertilizer positioning cylinder (44), and a second transmission gear (45). The fertilizing box (41) is fixedly mounted on the frame (1). A plurality of fertilizer dispensers (42) are arranged below the fertilizing box (41). The plurality of fertilizer dispensers (42) are equidistantly distributed below the fertilizing box (41) and are fixedly connected to the fertilizing box (41). Each of the fertilizer dispensers (42) corresponds to a fertilizer hose (43). The fertilizer hoses (43) are arranged in a The end of the fertilizer discharge hose (43) is connected to the inside of the fertilizer discharger (42), the fertilizer discharge positioning cylinder (44) is fixedly installed on the frame (1), the number of the fertilizer discharge positioning cylinders (44) is consistent with the number of the fertilizer discharger (42), and the position of the fertilizer discharge positioning cylinder (44) is the fertilizer application position of the fertilizer application structure (4), the other end of each fertilizer discharge hose (43) is respectively inserted into a fertilizer discharge positioning cylinder (44), and the end of the transmission shaft of the fertilizer discharger (42) is fixedly installed with a second transmission gear (45), and the second transmission gear (45) and the sowing structure (5) are driven by a chain.

5. The wheat seeder according to claim 1, characterized in that: The sowing structure (5) includes a sowing box (51), a seeding device (52), a sowing hose (53), a sowing positioning cylinder (54), a furrow opener (55), a third transmission gear (56), and an adjustment mechanism (57). The sowing box (51) is fixedly mounted on the frame (1). A plurality of seeding devices (52) are arranged below the sowing box (51). The plurality of seeding devices (52) are equidistantly distributed below the sowing box (51) and are fixedly connected to the sowing box (51). Each seeding device (52) is connected to a sowing hose (53). The sowing positioning cylinder (54) is slidably mounted on the frame (1). The number of the sowing positioning cylinders (54) is the same as the number of the seeding devices (52). The position of the sowing positioning cylinder (54) is the sowing position of the sowing structure (5). The other end of the sowing hose (53) is inserted into the sowing positioning cylinder (54). A furrow opener (55) is fixedly installed below each of the sowing positioning cylinders (54). Two third transmission gears (56) are fixedly installed at the end of the transmission shaft of the seed metering device (52). One of the third transmission gears (56) is connected to the fertilizing structure (4) through a chain transmission, and the other third transmission gear (56) is connected to the suppression structure (6) through a chain transmission. The adjustment mechanism (57) is installed below the sowing box (51) and is connected to the sowing positioning cylinder (54). The adjustment mechanism (57) is used to adjust the height of the sowing positioning cylinder (54).

6. The wheat seeder according to claim 5, characterized in that: The regulating mechanism (57) comprises a connecting shaft (571), a limiting mechanism (572), a first pulley (573), a second pulley (574), a linkage shaft (575), a cam (576), an regulating frame (577), a guide groove (578), a clamping base (57a), a connecting plate (57b), and a clamping plate (57c). The connecting shaft (571) is rotatably mounted on the side of the sowing structure (5) and the limiting mechanism (572) is fixedly mounted on the end extending out of the sowing box (51). The limiting mechanism (572) is used to The connecting shaft (571) is driven to rotate and the connecting shaft (571) is limited when the rotation stops. The connecting shaft (571) is located inside the sowing box (51) and is fixedly installed with a first pulley (573) near the sowing box (51). The first pulley (573) is connected to two second pulleys (574) through a belt. The two second pulleys (574) are at the same horizontal height. Each second pulley (574) is fixedly installed on a linkage shaft (575). Each linkage shaft (575) is rotatably mounted on the sowing box (51) at both ends, and a cam (576) is fixedly mounted on both sides of each linkage shaft (575). A guide groove (578) is provided on the adjustment frame (577). The number and position of the guide grooves (578) correspond to the number and position of the cams (576). The outer contour of the cam (576) is located in the guide groove (578) provided on the adjustment frame (577). All the sowing positioning cylinders (54) are fixedly mounted on the adjustment frame (577). Each sowing A clamping base (57a) is welded to the frame (1) on both sides of the positioning cylinder (54), one end of the connecting plate (57b) is rotatably mounted on the clamping base (57a) via a rotating shaft, and a torsion spring is mounted on the rotating shaft, one end of the torsion spring is mounted on the clamping base (57a), and the other end is mounted on the connecting plate (57b), and a clamping plate (57c) is fixedly mounted on the upper end of the connecting plate (57b), and the lower surface of the clamping plate (57c) is inclined upward from the position of the connecting plate (57b) toward the position of the sowing positioning cylinder (54).

7. The wheat seeder according to claim 6, characterized in that: The limiting mechanism (572) comprises an adjusting handle (5721), a limiting cap (5722), a reset spring (5723), and a slot (5724). The adjusting handle (5721) is fixedly mounted on the connecting shaft (571). The limiting cap (5722) is slidably mounted on the adjusting handle (5721) and rotates together with the rotation of the adjusting handle (5721). The reset spring (5723) is located in the limiting cap (5722) and is sleeved on the adjusting handle (5721). One end of the reset spring (5723) is mounted on the sowing box body (51), and the other end is mounted on the limiting cap (5722). The sowing box body (51) is provided with a plurality of slots (5724) equidistantly distributed in an annular pattern with the connecting shaft (571) as the center. The limiting cap (5722) is inserted into the slot (5724) toward the side of the sowing box body (51).

8. The wheat seeder according to claim 6, characterized in that: The limiting mechanism (572) comprises a servo motor (5725) and a protective housing (5726); the protective housing (5726) is fixedly mounted on the outside of the sowing box (51); the servo motor (5725) is fixedly mounted inside the protective housing (5726) and the output end is fixedly connected to the connecting shaft (571).

9. The wheat seeder according to claim 1, characterized in that: The pressing structure (6) includes a base plate (61), a connecting shell (62), a pressing roller (63), and a connecting gear (64). The two base plates (61) are fixedly mounted on the frame (1). A lifting frame is fixedly mounted on each base plate (61). A connecting shell (62) is fixedly mounted on each lifting frame. The two connecting shells (62) are rotatably mounted on both ends of the pressing roller (63). A driving motor is provided inside one of the connecting shells (62), and an output end on one side of the driving motor is fixedly connected to the pressing roller (63). A connecting gear (64) is fixedly mounted on the output end on the other side of the driving motor. The connecting gear (64) and the sowing structure (5) are driven by a chain.

10. The wheat seeder according to claim 2, characterized in that: An opening and closing plate (7) is provided on the rotary tillage housing (21), and one side of the opening and closing plate (7) is hinged to the rotary tillage housing (21) via a hinge.

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