A sand land management no-tillage supplemental seeding machine based on millet seed scattering and intelligent monitoring

Abstract

The utility model belongs to the no -tillage supplemental seeding machine technical field, especially based on the sand land management no -tillage supplemental seeding machine of legume and intelligent monitoring is provided, aiming at the different agronomic requirements of the existing sand land no -tillage supplemental seeding machine cannot satisfy legume seed wide -width broadcast and gramineae seed precision dibbling simultaneously, and the problem that the seeding depth is unstable in undulating sand land, seed tank is easy to block, lacks effective monitoring. The present application proposes the following scheme, including double connecting rod support frame, the utility model realizes the legume and independent seeding of separate channel, gramineae adopts the precision dibbling of finger clamp type and topographic profiling with the terrain, legume adopts centrifugal wide -width broadcast and linkage anti -blocking, and cooperates the intelligent monitoring of excess sensor, effectively solve the problem such as sand land mixed seeding uneven, unstable seeding depth, frequent blockage, lack of seeding and so on, significantly improve the emergence rate and operation reliability of sand land no -tillage supplemental seeding, and be applicable to the sandification grassland ecological restoration field.

Description

Technical Field

[0001] This utility model relates to a no-till reseeding machine, specifically a no-till reseeding machine for sandy land management based on seed and intelligent monitoring, belonging to the field of no-till reseeding machine technology. Background Technology

[0002] No-till reseeding is widely used as a vegetation restoration technology with minimal disturbance, low cost, and sustainable results. However, existing no-till reseeding equipment generally has design flaws and cannot simultaneously meet the dual challenges of the special environment of sandy land and the agronomic requirements of mixed crop-legume sowing.

[0003] In existing technologies, such as the grassland no-till reseeding machine disclosed in CN214338508U, seed boxes are separated and sown using independent seed metering devices for grasses and leguminous plants. While this device can separate seed boxes, its rigid, integral frame structure lacks independent contour-following mechanisms between the furrow openers. When operating on undulating sand dune terrain, the furrow depth fluctuates drastically with the terrain, resulting in seeds being buried too deep or exposed on the surface, severely impacting seed germination and seedling emergence. Another example is the sandy land hole-sowing shrub and broadcasting forage seeder disclosed in CN2559196Y, which can simultaneously perform shrub hole-sowing and forage broadcasting operations. However, this device is primarily designed for the combination of shrubs and forage grasses, and it fails to adequately meet the precise seeding requirements in mixed sowing scenarios involving grasses and leguminous forage grasses. Grasses often have awns, while leguminous seeds are smooth; if they are mixed and share a channel, they are prone to stratification and blockage. Furthermore, their optimal sowing methods are drastically different (grasses are best sown in rows, while leguminous seeds are best sown by broadcasting or hill sowing). Existing devices cannot switch between suitable sowing modes based on grass type on the same machine. Additionally, the device lacks an effective anti-blocking and intelligent monitoring system; if seed clogging or seed box depletion occurs during operation, operators may not detect it in time, leading to widespread missed sowing.

[0004] In summary, existing no-till reseeding equipment has varying degrees of shortcomings in terms of terrain adaptability, sowing method switching, prevention of blockage in mixed rice and bean sowing, and intelligent monitoring, making it difficult to simultaneously meet the comprehensive challenges of the special environment of sandy land and the agronomic requirements of mixed rice and bean sowing. Utility Model Content

[0005] This invention addresses the problem that existing no-till reseeding machines for sandy land cannot simultaneously meet the different agronomical requirements of wide-width broadcasting of legume seeds and precision sowing of grass seeds. It provides a no-till reseeding machine for sandy land management based on separate sowing of grass and legume seeds and intelligent monitoring.

[0006] This utility model achieves the above objectives through the following technical solution: a no-till reseeding machine for sandy land management based on seeding of rice and beans and intelligent monitoring, including a double-link support frame, a mounting frame fixedly connected to one side of the double-link support frame, and mounting plates symmetrically fixedly connected to the side of the double-link support frame away from the mounting frame by clamps, with a seed box of rice provided on the outer side of one side of each mounting plate, and L-shaped fixing columns fixedly connected to the outer sides of the two mounting plates on the surface of the double-link support frame by clamps, with a seed box of beans provided on one side of the L-shaped fixing column; The lower part of the grass seed box is connected to a finger-clamp seeder. An adaptive component is set between the grass seed box and the mounting plate. When the finger-clamp seeder encounters uneven ground, the adaptive component keeps the finger-clamp seeder horizontal and allows it to float up and down with the terrain. A soil covering wheel and a tensioning component are set at the rear of the finger-clamp seeder. When the soil covering wheel encounters uneven ground, the tensioning component keeps the soil covering wheel in close contact with the ground surface. The bottom of the seed box is equipped with a centrifugal spreading disc, and the inside of the seed box is equipped with an anti-clogging component. While the centrifugal spreading disc is spreading the seeds, the anti-clogging component connected to it keeps the seeds in the seed box loose.

[0007] As a further improvement of this utility model: an adjustable telescopic support column is symmetrically fixed to the surface of the double-link support frame near the mounting frame by a clamp, and a traveling wheel is rotatably connected to the U-shaped groove at the bottom of the adjustable telescopic support column by a rotating shaft.

[0008] As a further embodiment of this utility model: the adaptive component includes a parallel four-bar linkage and a hollow connecting block. An L-shaped bent rod is fixedly connected to the surface of the hollow connecting block by bolts. The L-shaped bent rod is fixedly connected to the seed box. A first rotating rod is symmetrically fixedly connected inside the mounting plate. A second rotating rod is symmetrically fixedly connected inside the hollow connecting block. The height of the first rotating rod is higher than that of the second rotating rod. The parallel four-bar linkage is hinged between the first and second rotating rods. An extension bracket is symmetrically fixedly connected to the outer wall of the hollow connecting block by bolts. The finger-clamp seeder is rotatably connected between the two extension brackets via a rotating shaft. The side wall of the mounting plate is also symmetrically threaded with positioning bolts. The installation position of the positioning bolts is located below the upper connecting rod inside the parallel four-bar linkage.

[0009] As a further embodiment of this utility model: the tensioning assembly includes a tensioning spring and a control lever. The end of the L-shaped bent rod is fixedly connected to a connecting frame. The bottom surface of the connecting frame is rotatably connected to a hinge block. The bottom surface of the hinge block is rotatably connected to a third rotating rod. The control lever is rotatably sleeved on the surface of the third rotating rod, and the control lever and the third rotating rod are relatively slidably arranged. The soil covering wheel is symmetrically rotatably connected to the side surface of the hinge block. A tensioning spring is fixedly connected between the control lever and the connecting frame. Multiple limiting slots are opened on the upper surface of the hinge block. The top end of the control lever extends to the upper side of the hinge block. In the initial state, the control lever is placed in the smooth groove of the limiting slot.

[0010] As a further embodiment of this utility model: a bidirectional hydraulic cylinder is fixedly installed at the center of the surface of the double-link support frame, and mounting ears are fixedly connected to the telescopic ends on both sides of the bidirectional hydraulic cylinder. A symmetrically arranged movable sleeve is slidably sleeved on the frame of the double-link support frame, and a positioning block is fixedly connected to the surface of each movable sleeve. The two mounting ears are connected to the positioning blocks by bolts.

[0011] As a further embodiment of this utility model: each L-shaped fixed column has a positioning frame fixedly connected to its surface by a clamp, a bean seed box is fixedly connected to its inner wall by bolts, a discharge pipe is fixedly connected to the bottom outlet of the bean seed box, an L-shaped support plate is fixedly connected to the inner bottom surface of the positioning frame, a fourth rotating rod is rotatably connected to the surface of the L-shaped support plate, a drive motor is fixedly connected to the bottom surface of the L-shaped support plate, the drive motor and the fourth rotating rod are coaxially fixedly connected, a centrifugal spreading disc is fixedly connected to the top of the fourth rotating rod, the centrifugal spreading disc is located directly below the discharge pipe, and multiple guide strips are fixedly connected to the surface of the centrifugal spreading disc in a circular array.

[0012] As a further embodiment of this utility model: the anti-clogging component includes a stirring rod and a flexible stirring shaft. The stirring rod is rotatably connected to the inner wall of the bean seed box, and the flexible stirring shaft is fixed at equal intervals to the rod body of the stirring rod. A Z-shaped frame is fixedly connected to the surface of the L-shaped support plate, and a fifth rotating rod is rotatably connected to the surface of the Z-shaped frame. A first bevel gear is fixedly connected to one end of the fifth rotating rod, and a second bevel gear is fixedly sleeved on the rod body of the fourth rotating rod. The first bevel gear and the second bevel gear are meshed together. One end of the stirring rod extends to the outside of the bean seed box, and a belt drive mechanism is connected between the other end of the fifth rotating rod and the end of the stirring rod extending to the outside of the bean seed box.

[0013] As a further improvement of this utility model, a margin sensor is fixedly connected to the inner wall of both the bean seed box and the grass seed box near their bottom positions.

[0014] As a further embodiment of this utility model: a U-shaped mounting block is fixedly connected to the side wall of the mounting plate, an adjusting column is slidably arranged on the inner wall surface of the U-shaped mounting block, a groove opener is fixedly connected to the bottom surface of the adjusting column, and multiple positioning holes are equally spaced on the surface of the adjusting column. The adjusting column is connected to the U-shaped mounting block by adjusting bolts.

[0015] As a further embodiment of this utility model: a hook lock is rotatably connected to the surface of the upper first rotating rod. The bottom surface of the hook lock has a slot that matches the size of the second rotating rod. When the hook lock is placed on the surface of the lower second rotating rod, the finger-clamp seeder does not work. Two tension springs are symmetrically rotatably connected to the surface of the lower first rotating rod. The bottom end of the tension spring is connected to a locking plate through a hook. The two upper connecting rods of the parallel four-bar linkage have locking grooves at equal intervals on their surfaces, and the locking plates are adapted to the locking grooves.

[0016] The beneficial effects of this utility model are: 1. This utility model achieves physical isolation and independent sowing of grass and bean seeds by setting up a double-link support frame and independently installing grass seed boxes and bean seed boxes, which completely solves the problems of uneven sowing and channel blockage caused by differences in the physical characteristics of seeds in traditional mixed seeders; by using a finger-clamp seeder on the grass side in conjunction with an adaptive component consisting of a parallel four-link, a hollow connecting block, a first rotating rod, a second rotating rod, an extension bracket and positioning bolts, it achieves precise sowing and constant posture contour sowing of grass seeds on undulating sandy land, ensuring consistent sowing depth and centered seed placement; 2. This utility model, by setting up a soil covering tensioning component consisting of a tension spring, a control lever, a connecting frame, a hinge block, a third rotating rod, and a limiting slot, achieves zero-gap following of the soil covering wheel to the surface of the sandy land and graded adjustment of the soil covering pressure, ensuring that the soil covering is dense without hardening; by setting up a centrifugal sowing disc and its surface guide strip on the legume side, and cooperating with a linkage anti-clogging component consisting of a stirring rod, a flexible stirring shaft, a Z-shaped frame, a fifth rotating rod, a first bevel gear, a second bevel gear, and a belt drive mechanism, it achieves wide and uniform sowing of legume seeds and continuous loosening and anti-clogging of seeds in the seed box, eliminating the phenomenon of interruption in the sowing process; 3. This utility model achieves hydraulic stepless synchronous adjustment of the row spacing for gramineous seeding through a two-way hydraulic cylinder, mounting ear, moving sleeve, and positioning block installed at the center of the double-link support frame, which can optimize the row configuration according to sandy conditions at any time; through the combination of adjustable telescopic support and walking wheels, the force distribution of the whole machine is optimized and the traction resistance is greatly reduced, while the ground clearance is adjusted during transportation. 4. This utility model achieves real-time independent intelligent monitoring of the two seed boxes through the remaining amount sensors at the bottom of the inner walls of the bean seed box and the grass seed box, effectively preventing seed shortages and missed sowing; through the U-shaped mounting block, adjusting column, adjusting bolt and positioning hole fixed to the side wall of the mounting plate, it achieves rapid and precise adjustment of the furrow opener depth, ensuring that different grass species can obtain the optimal sowing depth; through the mechanism composed of hook lock, tension spring, locking plate and locking groove, it achieves unilateral selective locking and lifting of the grass sowing unit and graded precise adjustment of the ground pressure of the finger clamp seeder, significantly improving the machine's operational flexibility and adaptability to different sandy soil hardness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the seed box and the double-link support frame of this utility model; Figure 3 This is a schematic diagram of the connection structure between the adaptive component, the finger-clamp seeder, and the movable sleeve of this utility model; Figure 4 This is a schematic diagram of the adaptive component in this utility model; Figure 5 This is a cross-sectional structural diagram of the adaptive component in this utility model; Figure 6 This is a front view schematic diagram of the connection structure between the soil covering wheel and the tensioning assembly in this utility model; Figure 7 This is a rear view schematic diagram of the connection structure between the soil covering wheel and the tensioning assembly in this utility model; Figure 8 This is a schematic diagram of the bean seed box in this utility model; Figure 9 This is a schematic cross-sectional view of the bean seed box of this utility model; Figure 10 This is a schematic diagram of the connection structure between the trencher and the adjusting column in this utility model.

[0018] In the diagram: 1. Double-link support frame; 2. Mounting frame; 31. Traveling wheel; 32. Adjustable telescopic support column; 4. Mounting plate; 41. First rotating rod; 42. Hollow connecting block; 43. Second rotating rod; 44. Parallel four-link; 45. L-shaped bent rod; 46. Gramine seed box; 47. Extension bracket; 48. Finger-clamp seeder; 49. Positioning bolt; 5. Connecting frame; 51. Hinge block; 52. Soil covering wheel; 53. Third rotating rod; 54. Control lever; 55. Tension spring; 56. Limiting slot; 6. Moving sleeve; 61. Positioning block; 62. Two-way hydraulic cylinder; 63. Installation plate. 7. Ear; 8. L-shaped fixing column; 9. Positioning frame; 10. Seed box; 11. L-shaped support plate; 12. Fourth rotating rod; 13. Drive motor; 14. Second bevel gear; 15. First bevel gear; 16. Centrifugal spreading disc; 17. Guide bar; 18. Z-shaped frame; 19. Fifth rotating rod; 10. Belt drive mechanism; 11. Stirring rod; 12. Flexible stirring shaft; 13. Balance sensor; 14. U-shaped mounting block; 15. Adjusting column; 16. Adjusting bolt; 17. Furrow opener; 18. Tensioning spring; 19. Locking plate; 10. Locking groove; 11. Hook lock. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 like Figures 1 to 10As shown, a no-till reseeding machine for sandy land management based on seeding of rice and beans and intelligent monitoring includes a double-link support frame 1. A mounting frame 2 is fixedly connected to one side of the double-link support frame 1. Mounting plates 4 are symmetrically fixedly connected to the side of the double-link support frame 1 away from the mounting frame 2 via clamps. A seed box 46 for rice is provided on one side of each mounting plate 4. L-shaped fixing columns 7 are fixedly connected to the outer sides of the two mounting plates 4 via clamps on the surface of the double-link support frame 1. A seed box 81 for beans is provided on one side of each L-shaped fixing column 7. The machine utilizes a double-link support frame 1 with double-link support. A connecting rod support frame 1 is provided, with a mounting frame 2 fixedly connected to one side. Mounting plates 4 are symmetrically fixedly connected to the side away from the mounting frame 2 by clamps. A grass seed box 46 is provided on the outer side of one side of each mounting plate 4. At the same time, an L-shaped fixing column 7 is fixedly connected to the outer side of the two mounting plates 4 on the surface of the double connecting rod support frame 1 by clamps. A bean seed box 81 is provided on one side of the L-shaped fixing column 7. This overall layout structure realizes the independent, symmetrical and non-interfering installation of legume and grass seed boxes on the double connecting rod support frame 1.

[0021] The lower part of the grass seed box 46 is connected to a finger-clamp seeder 48. An adaptive component is set between the grass seed box 46 and the mounting plate 4. When the finger-clamp seeder 48 encounters uneven ground, the adaptive component connected to it keeps the finger-clamp seeder 48 horizontal and allows it to float up and down with the terrain. A soil covering wheel 52 and a tensioning component are set behind the finger-clamp seeder 48. When the soil covering wheel 52 encounters uneven ground, the tensioning component connected to it keeps the soil covering wheel 52 in close contact with the ground surface. The finger-clamp seeder 48 is connected to the lower part of the grass seed box 46. The finger-clamp forced seed picking mechanism realizes the precise control of grass seeds, overcomes the defects of pneumatic seed metering devices that are prone to clogging and uneven seeding in sandy and dusty environments, and ensures that grass forage seeds can be placed into the seed furrow at fixed points, either single or double. The adaptive component between the seed box 46 and the mounting plate 4 allows the finger-clamp seeder 48 to remain horizontal and float up and down with the terrain when encountering ground undulations. This adaptive component adopts the contour-following principle of the parallel four-bar linkage 44. When the ground height changes, the finger-clamp seeder 48 rises or falls with the terrain, but its sowing plane is always parallel to the horizontal plane, thus ensuring that the grass seeds are placed in the center of the seed furrow at the predetermined depth, and that the seeds are not scattered outside the furrow or piled up too deep due to the tilt of the seeder. When the covering wheel 52 encounters ground undulations, the tensioning component provides continuous downward pressure through the tension spring 55, so that the covering wheel 52 can compress the sand to cover the seed furrow tightly, while floating freely up and down with the terrain, ensuring that the dry and wet sand on the surface of the sandy land is reasonably mixed and covered on top of the seeds.

[0022] The bottom surface of the bean seed box 81 is provided with a centrifugal sowing disc 87, and the inside of the bean seed box 81 is provided with an anti-clogging component. While the centrifugal sowing disc 87 is spreading the seeds, the anti-clogging component connected to it keeps the seeds in the bean seed box 81 loose. This utility model provides a centrifugal sowing disc 87 on the bottom surface of the bean seed box 81, and realizes the sowing of legume seeds by centrifugal throwing. This complements the finger-clamping sowing of grass seeds, enabling legume plants to form a continuous or semi-continuous vegetation cover layer on the sandy surface, which greatly improves the windbreak and sand fixation effect. The anti-clogging component inside the bean seed box 81 continuously agitates the seeds in the bean seed box 81 through a stirring rod 811 and a flexible stirring shaft 812 to prevent the phenomenon of blockage caused by the seeds squeezing each other, clumping due to moisture, or backflow of sand and dust.

[0023] It should be noted that the finger-clamp seeder 48 is a known and mature technology, and its principle will not be elaborated here.

[0024] Example 2 Improvements based on Example 1: like Figure 1 As shown, an adjustable telescopic support column 32 is symmetrically fixed to the surface of the double-link support frame 1 on the side of the frame 2 via a clamp. A traveling wheel 31 is rotatably connected to the U-shaped groove at the bottom of the adjustable telescopic support column 32 via a rotating shaft.

[0025] An adjustable telescopic support column 32 is symmetrically fixed to the surface of the pole body of the double-link support frame 1 near the mounting frame 2 by means of a clamp, and a walking wheel 31 is rotatably connected to the U-shaped groove at the bottom of the adjustable telescopic support column 32 by means of a rotating shaft, thereby realizing the function of adjustable front support height and wheel rolling movement.

[0026] Furthermore, the adaptive component includes a parallel four-bar linkage 44 and a hollow connecting block 42. An L-shaped bent rod 45 is fixedly connected to the surface of the hollow connecting block 42 by bolts. The L-shaped bent rod 45 is fixedly connected to the seed box 46. A first rotating rod 41 is symmetrically fixedly connected inside the mounting plate 4. A second rotating rod 43 is symmetrically fixedly connected inside the hollow connecting block 42. The height of the first rotating rod 41 is higher than that of the second rotating rod 43. The parallel four-bar linkage 44 is hinged between the first rotating rod 41 and the second rotating rod 43. An extension bracket 47 is symmetrically fixedly connected to the outer wall of the hollow connecting block 42 by bolts. A finger-clamp seeder 48 is rotatably connected between the two extension brackets 47 via a rotating shaft. A positioning bolt 49 is also symmetrically threaded on the side wall of the mounting plate 4. The installation position of the positioning bolt 49 is located below the upper connecting rod inside the parallel four-bar linkage 44. The parallel four-bar linkage 44 is hinged between the first rotating rod 41 and the second rotating rod 43, which are at different heights, forming a double rocker configuration in the four-bar linkage. When the hollow connecting block 42 rises or falls with the terrain, the four rods of the parallel four-bar linkage 44 swing synchronously, but the attitude angle of the hollow connecting block 42 remains unchanged. This ensures that the extension bracket 47 fixed to the outer wall of the hollow connecting block 42 and the finger-clamp seeder 48 connected to the extension bracket 47 by rotating shafts remain in a horizontal state. Under the high-frequency undulation of the sandy surface, the seed inlet plane of the finger-clamp seeder 48 is always parallel to the horizontal plane, ensuring that the grass seeds are accurately placed on the same depth reference plane of the seed furrow, and that the seeds do not roll down the furrow wall or jump out of the seed furrow due to the tilt of the seeder. The positioning bolt 49 is installed below the upper connecting rod inside the parallel four-bar linkage 44, which plays a limiting role and prevents the parallel four-bar linkage 44 from drooping excessively, resulting in a shallow seeding depth or damage to the finger-clamp seeder 48 from hitting hard objects on the ground.

[0027] Furthermore, the tensioning assembly includes a tension spring 55 and a control lever 54. The end of the L-shaped bent rod 45 is fixedly connected to a connecting frame 5. The bottom surface of the connecting frame 5 is rotatably connected to a hinge block 51. The bottom surface of the hinge block 51 is rotatably connected to a third rotating rod 53. The control lever 54 is rotatably sleeved on the surface of the third rotating rod 53, and the control lever 54 and the third rotating rod 53 are relatively slidably arranged. The soil covering wheel 52 is symmetrically rotatably connected to the side surface of the hinge block 51. The tension spring 55 is fixedly connected between the control lever 54 and the connecting frame 5. The upper surface of the hinge block 51 is provided with multiple limiting slots 56. The top end of the control lever 54 extends to the upper side of the hinge block 51. In the initial state, the control lever 54 is placed in the smooth groove of the limiting slot 56.

[0028] The covering wheel 52 is symmetrically rotated and connected to the side surface of the hinge block 51, forming a V-shaped angle between the two wheels. When the hinge block 51 is subjected to downward pressure, the two wheels squeeze the sand inward and downward from both sides of the seed furrow, pushing the upper dry sand and lower wet sand turned over by the furrow opener 13 back into the furrow, achieving coverage and light compaction of the grass seeds. The upper end of the tension spring 55 is fixed to the connecting frame 5, and the lower end is fixed to the operating lever 54. The operating lever 54 can rotate around the third rotating rod 53 and slide along its axis. When the top of the operating lever 54 is engaged in the limiting slots 56 of different depths, the initial length of the tension spring 55 is changed, thereby generating different pre-tension forces. This pre-tension force is converted into the normal pressure of the covering wheel 52 on the ground surface through the geometric relationship between the connecting frame 5 and the hinge block 51. The operator can manually move the operating lever 54 to switch between the limiting slots 56 according to the sandy field conditions: for flowing For dry sand with high mobility, a deeper groove is chosen to generate greater tension in the tension spring 55, increasing the pressure of the covering wheel 52 on the ground surface. This compacts the loose dry sand into a dense cover layer, preventing wind erosion and moisture loss. For wet sand with high clay content, a shallower groove is chosen to reduce pressure, avoiding over-compaction that could lead to seed layer hypoxia or the formation of a hard shell that hinders seed germination. During operation, when the covering wheel 52 encounters a ground protrusion, the wheel is lifted, and the hinge block 51 swings upward around the hinge point of the connecting frame 5. Since the operating lever 54 is in the limited position in the limiting groove 56, the tension spring 55 is further stretched to store energy. After the protrusion, the restoring force of the tension spring 55 drives the covering wheel 52 to return to its original position with faster acceleration, causing the wheel to re-press the ground surface. This dynamic response characteristic ensures that the covering wheel 52 always maintains contact with the ground surface without gaps or impacts, thus achieving perfect contour-following covering.

[0029] Furthermore, a bidirectional hydraulic cylinder 62 is fixedly installed at the center of the surface of the double-link support frame 1. The telescopic ends on both sides of the bidirectional hydraulic cylinder 62 are fixedly connected to mounting ears 63. The frame of the double-link support frame 1 is slidably sleeved with symmetrically arranged movable sleeves 6. The surface of each movable sleeve 6 is fixedly connected to a positioning block 61. The two mounting ears 63 are connected to the positioning blocks 61 by bolts. A bidirectional hydraulic cylinder 62 is fixedly installed at the center of the double-link support frame 1. When oil is supplied to one chamber of the bidirectional hydraulic cylinder 62, its telescopic ends on both sides extend or retract synchronously. Through the mounting ears 63 and the positioning block 61, the moving sleeve 6 slides symmetrically on the connecting rod surface of the double-link support frame 1. The sliding movement of the moving sleeve 6 is further transmitted to the mounting plate 4 through the positioning block 61, thereby realizing the lateral spacing adjustment between the two mounting plates 4 and the components such as the grass seed box 46, the finger-clamp seeder 48, and the soil covering wheel 52 fixed on them. This utility model uses a bidirectional hydraulic cylinder 62 for hydraulic drive, allowing the driver to complete the stepless adjustment of the row spacing without leaving the cab. During the adjustment process, the movement of the two grass seeding units is completely synchronized, greatly improving the adaptability and adjustment efficiency of sandy land reseeding to different plot conditions. At the same time, this structure also allows the reseeder to dynamically adjust the row spacing according to the real-time observed vegetation cover of the sandy land during operation, realizing online adaptive optimization of the row spacing.

[0030] Furthermore, each L-shaped fixed column 7 has a positioning frame 8 fixedly connected to its surface by a clamp. The inner wall of the positioning frame 8 is fixedly connected to a bean seed box 81 by bolts. A discharge pipe is fixedly connected to the bottom outlet of the bean seed box 81. An L-shaped support plate 82 is fixedly connected to the inner bottom surface of the positioning frame 8. A fourth rotating rod 83 is rotatably connected to the surface of the L-shaped support plate 82. A drive motor 84 is fixedly connected to the bottom surface of the L-shaped support plate 82. The drive motor 84 and the fourth rotating rod 83 are coaxially fixedly connected. A centrifugal spreading disc 87 is fixedly connected to the top of the fourth rotating rod 83. The centrifugal spreading disc 87 is located directly below the discharge pipe. Multiple guide strips 871 are fixedly connected to the surface of the centrifugal spreading disc 87 in a circular array.

[0031] The drive motor 84 is fixed to the bottom surface of the L-shaped support plate 82, and its output shaft is coaxially fixedly connected to the fourth rotating rod 83. When the drive motor 84 starts, the fourth rotating rod 83 drives the centrifugal spreading disc 87 to rotate at high speed. The legume seeds in the seed box 81 fall through the discharge pipe at the bottom outlet position and fall directly onto the rotating centrifugal spreading disc 87. Since the surface of the centrifugal spreading disc 87 is arranged in a circular array with multiple guide strips 871 fixedly connected, after the seeds fall onto the disc, they accelerate outward along the guide strips 871 under the action of centrifugal force and are thrown out from the tangential direction of the disc edge, forming a uniform fan-shaped spreading width. The number and shape of the guide strips 871 are optimized to enable the seeds to obtain sufficient linear velocity before being thrown out and to be thrown out in a predetermined direction, avoiding the seeds from slipping on the disc surface and causing uneven sowing.

[0032] Furthermore, the anti-clogging component includes a stirring rod 811 and a flexible stirring shaft 812. The stirring rod 811 is rotatably connected to the inner wall of the bean seed box 81. The flexible stirring shaft 812 is fixed at equal intervals to the rod body of the stirring rod 811. A Z-shaped frame 88 is fixedly connected to the surface of the L-shaped support plate 82. A fifth rotating rod 89 is rotatably connected to the surface of the Z-shaped frame 88. A first bevel gear 86 is fixedly connected to one end of the fifth rotating rod 89. A second bevel gear 85 is fixedly sleeved on the rod body of the fourth rotating rod 83. The first bevel gear 86 and the second bevel gear 85 are meshed together. One end of the stirring rod 811 extends to the outside of the bean seed box 81. A belt drive mechanism 810 is connected between the other end of the fifth rotating rod 89 and the end of the stirring rod 811 extending to the outside of the bean seed box 81.

[0033] While the drive motor 84 drives the fourth rotating rod 83 and the centrifugal spreading disc 87 to rotate for spreading operations, the second bevel gear 85, which is fixedly sleeved on the body of the fourth rotating rod 83, rotates accordingly, and drives the first bevel gear 86, which meshes with it, to rotate. The first bevel gear 86 is fixed to one end of the fifth rotating rod 89, so the fifth rotating rod 89 rotates synchronously under the support of the Z-shaped frame 88. The other end of the fifth rotating rod 89 transmits power to the stirring rod 811, which extends to the outside of the bean seed box 81, through the belt transmission mechanism 810, thereby driving the stirring rod 811 to rotate slowly inside the bean seed box 81. The flexible stirring shaft 812, which is fixed at equal intervals on the body of the stirring rod 811, then performs a circular stirring motion inside the seed box. This structure eliminates the need for a separate power source for the anti-clogging components. It draws power from the drive shaft of the centrifugal sowing disc 87 via a set of bevel gears and belt drive mechanism 810, achieving mechanical linkage between sowing and stirring. The flexible stirring shaft 812 is made of a material with a certain degree of flexibility, which can effectively destroy the overhead arch structure between seeds during stirring without causing mechanical damage to leguminous seeds, such as breaking the seed coat or cutting the radicle, thus avoiding the seed breakage problem caused by rigid stirrers.

[0034] Furthermore, a margin sensor 9 is fixedly connected to the inner wall of both the bean seed box 81 and the grass seed box 46 near their bottom positions.

[0035] The remaining seed level sensor 9 is fixedly installed on the inner wall of the seed box near the bottom. It can accurately sense the remaining seed level in the seed box. When the seed level drops below the sensor installation height, the remaining seed level sensor 9 sends an electrical signal to the central controller or display screen in the cab to promptly remind the operator to replenish the seeds.

[0036] It should be noted that the remaining amount sensor 9 can be photoelectric, capacitive, or ultrasonic, adaptable to sandy high-dust environments. Its installation position can be adjusted according to the single-operation quantity requirements of different seeds. For example, for seeds that are consumed quickly, the installation position of the remaining amount sensor 9 can be appropriately raised to provide early warning.

[0037] Furthermore, a U-shaped mounting block 10 is fixedly connected to the side wall of the mounting plate 4, and an adjusting column 11 is slidably provided on the inner wall surface of the U-shaped mounting block 10. A groove opener 13 is fixedly connected to the bottom surface of the adjusting column 11, and multiple positioning holes are equally spaced on the surface of the adjusting column 11. The adjusting column 11 is connected to the U-shaped mounting block 10 through adjusting bolts 12.

[0038] The furrow opener 13 is fixedly connected to the bottom surface of the adjusting column 11. The adjusting column 11 is slidably mounted on the inner wall of the U-shaped mounting block 10, which is fixedly connected to the side wall of the mounting plate 4. This forms a rigid connection between the furrow opener 13 and the entire grass seeding unit. When the furrow depth needs to be adjusted, the operator only needs to loosen the adjusting bolt 12 that passes through the positioning holes of the U-shaped mounting block 10 and the adjusting column 11, move the adjusting column 11 up and down to the target position, and then reinsert and tighten the adjusting bolt 12. This changes the distance between the furrow opener 13 and the lowest point of the ground relative to the finger-clamp seeder 48, thereby precisely controlling the furrow depth. Multiple positioning holes are evenly spaced on the surface of the adjusting column 11, each corresponding to a furrow depth setting. This achieves stepped and precise adjustment of the furrow depth, avoiding the problem of inconsistent furrow depths on both sides when adjusting without a scale.

[0039] Furthermore, a hook lock 15 is rotatably connected to the surface of the upper first rotating rod 41. The bottom surface of the hook lock 15 has a slot that matches the size of the second rotating rod 43. When the hook lock 15 is locked onto the surface of the lower second rotating rod 43, the finger-clamp seeder 48 does not work. Two tension springs 14 are symmetrically rotatably connected to the surface of the lower first rotating rod 41. The bottom end of the tension spring 14 is connected to a locking piece 141 through a hook. The two upper connecting rods of the parallel four-bar linkage 44 have locking grooves 142 at equal intervals. The locking piece 141 matches the locking groove 142.

[0040] This invention features a hook lock 15 that rotates downwards around the first rotating rod 41, causing the slot on the bottom of the hook lock 15 to engage with the body of the second rotating rod 43 located below. Because the hook lock 15 has a fixed length and the slot matches the diameter of the second rotating rod 43, this action forcibly shortens the distance between the upper and lower hinge points, causing the parallel four-bar linkage 44 to fold upwards, raising the entire finger-clamp seeder 48 to its highest position and locking it. At this point, the seeder's ground clearance is maximized, allowing for safe transport at higher speeds without collision with the ground. The slot of the hook lock 15 can be designed with an elastic buckle or spring locking pin to prevent accidental disengagement during transport. In this invention, the upper end of the tension spring 14 is rotatably connected to the surface of the first rotating rod 41 located below, and the lower end is connected to a locking piece 141 via a hook. The locking piece 141 can be inserted into the locking slots 142 opened on the surfaces of the two upper connecting rods of the parallel four-bar linkage 44. Because the tension spring 14 is always under tension, it applies an inward pulling force to the locking plate 141, ensuring that the locking plate 141 is firmly embedded in the locking groove 142 and will not come out. Multiple locking grooves 142 are evenly spaced; inserting the locking plate 141 into different positions of the locking grooves 142 yields different initial downward swing angles of the parallel four-bar linkage 44, thereby changing the initial ground pressure and furrowing depth reference of the finger-clamp seeder 48.

[0041] Working principle: During use, the machine is first connected to the tractor's three-point suspension via mounting frame 2, with the tractor providing traction power and hydraulic output. Before starting operation, the operator makes a series of preset adjustments based on the actual conditions of the sandy land and the legume and grass varieties being sown; Hydraulic control of the bidirectional cylinder 62 drives the moving sleeve 6 to slide symmetrically on one of the connecting rods of the double-link support frame 1, thereby changing the lateral spacing of the two mounting plates 4 and all the grass seeding units connected to them, i.e., the grass seeding row spacing; by adjusting the column 11 sliding in the U-shaped mounting block 10 and locking it with bolts through the positioning holes, the vertical position of the furrow opener 13 relative to the finger-clamp seeder 48 is changed, thereby setting the sowing depth of grass seeds; by moving the control lever 54 so that its top end is engaged in the limiting slots 56 at different positions on the upper surface of the hinge block 51, the initial preload of the tension spring 55 is changed, thereby setting the downward pressure of the covering wheel 52 on the sandy ground; by inserting the locking plate 141 into the locking slots 142 at different positions on the two connecting rods above the parallel four-link 44, in conjunction with the tension of the tension spring 14, the initial working posture of the adaptive component is set, i.e., the initial contact pressure and reference height of the finger-clamp seeder 48 on the ground; When moving the machine to a new location, rotate the hook lock 15 downwards so that its slot locks the second rotating rod 43. The parallel four-link rod 44 is completely folded and locked. The finger-clamp seeder 48 is lifted off the ground to a safe height. At the same time, the walking wheels 31 support the front of the machine to travel smoothly under the adjustment of the adjustable telescopic support column 32. After entering the sandy area, the tractor pulls the reseeder forward at an appropriate speed. The traveling wheels 31 roll under the support of the adjustable telescopic struts 32, bearing the weight of the front and providing support points. Gramineous seeds in the grass seed box 46 are continuously fed to the finger-clamp seeder 48 under the action of gravity and vibration. The seed-discharging wheel of the finger-clamp seeder 48 rotates under the drive mechanism, and the elastic fingers on it forcibly grab single or double grass seeds from the seed layer and hold them to the seed inlet for release. The seeds fall into the seed furrow in a near-free fall manner. Leguminous seeds in the bean seed box 81 flow continuously out of the discharge pipe at the bottom outlet position and fall into the central area of ​​the high-speed rotating centrifugal spreading disc 87 below. Under the action of centrifugal force, they accelerate outward along the guide strip 871 and are thrown out from the tangential direction of the disc edge, evenly covering the sandy surface. During the contour-following process of sowing grass seeds, when the reseeder encounters a surface protrusion, the parallel four-bar linkage 44, with one end hinged to the first rotating rod 41 of the mounting plate 4 and the other end hinged to the second rotating rod 43 of the hollow connecting block 42, and with opposite sides of the parallel four-bar linkage 44 having equal lengths, allows the hollow connecting block 42 and the finger-clamp seeder 48 connected to it via the extension bracket 47 to move upwards as a whole while maintaining a constant attitude angle, meaning the seed inlet remains horizontal. Simultaneously, the positioning bolt 49 limits the maximum swing amplitude of the lower connecting rod of the parallel four-bar linkage 44 to prevent excessive sinking. When the ground sinks, the parallel four-bar linkage 44 swings in the opposite direction, causing the finger-clamp seeder 48 to move downwards as a whole, also maintaining a horizontal attitude, ensuring the seeds always fall in the center of the furrow bottom. After the finger-clamp seeder 48 completes seeding, the covering wheel 52 behind it adheres tightly to the ground surface under the action of the tensioning component. The tension spring 55 continuously applies downward pressure to the covering wheel 52 through the operating lever 54 and the hinge block 51. The two symmetrically arranged covering wheels 52 push the sand inward from both sides of the seed furrow, covering the seeds and lightly compacting them. No matter how the ground surface is uneven, the covering wheel 52 responds quickly under the elastic force of the tension spring 55, always maintaining contact with the sand surface, without being suspended or excessively pressed down. During the anti-clogging linkage process of legume sowing, while the drive motor 84 drives the fourth rotating rod 83 and the centrifugal sowing disc 87 to rotate at high speed, the second bevel gear 85, which is fixedly sleeved on the fourth rotating rod 83, drives the first bevel gear 86, which meshes with it, to rotate. This, in turn, drives the fifth rotating rod 89 to rotate within the Z-shaped frame 88. The fifth rotating rod 89 transmits power to one end of the stirring rod 811, which extends to the outside of the bean seed box 81, through the belt transmission mechanism 810, causing the stirring rod 811 to rotate slowly inside the seed box. The flexible stirring shaft 812, which is fixed to the stirring rod 811, then performs a circular motion, continuously disturbing the legume seeds in the seed box, breaking up any possible overhead arches or clumps, and ensuring that the seeds flow continuously and evenly to the discharge pipe and the centrifugal sowing disc 87 below. In terms of intelligent monitoring, the seed level sensor 9 located near the bottom of the inner wall of the bean seed box 81 and the grass seed box 46 detects the seed level in real time. When the seeds in the seed box are consumed to below the sensor installation height, the seed level sensor 9 sends an electrical signal to the display screen and alarm in the cab to remind the operator to replenish the seeds in time and avoid seeding interruption or missed seeding accidents. This system enables precision sowing of grass seeds and wide-row broadcasting of leguminous seeds in a single operation. Adaptive contouring and soil covering contouring ensure the stability of sowing depth and soil covering quality on undulating sandy terrain. Linked anti-blocking mechanisms ensure continuous broadcasting, while rapid adjustment of row spacing, depth, and soil covering pressure allows for flexible adaptation to various sandy conditions. An intelligent monitoring system eliminates the risk of missed seeds. The entire process requires no machine downtime for adjustments, and a single operator can complete all operations, resulting in significantly higher operational efficiency compared to traditional reseeding methods in sandy areas.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A no-till reseeding machine for sandy land management based on seeding of rice and beans and intelligent monitoring, comprising a double-link support frame (1), characterized in that: A mounting frame (2) is fixedly connected to one side of the double-link support frame (1). A mounting plate (4) is symmetrically fixedly connected to the side of the double-link support frame (1) away from the mounting frame (2) by a clamp. A grass seed box (46) is provided on the outside of one side of each mounting plate (4). An L-shaped fixing column (7) is fixedly connected to the surface of the double-link support frame (1) on the outside of the two mounting plates (4) by a clamp. A bean seed box (81) is provided on one side of the L-shaped fixing column (7). The lower part of the grass seed box (46) is connected to a finger-clamp seeder (48). An adaptive component is provided between the grass seed box (46) and the mounting plate (4). When the finger-clamp seeder (48) encounters ground undulations, the adaptive component connected to it keeps the finger-clamp seeder (48) always horizontal and floats up and down with the terrain. A soil covering wheel (52) and a tensioning component are provided behind the finger-clamp seeder (48). When the soil covering wheel (52) encounters ground undulations, the tensioning component connected to it keeps the soil covering wheel (52) always in close contact with the ground surface. The bottom surface of the seed box (81) is provided with a centrifugal spreading disc (87), and the inside of the seed box (81) is provided with an anti-clogging component. While the centrifugal spreading disc (87) is spreading the material, the anti-clogging component connected to it keeps the seeds in the seed box (81) loose.

2. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 1, characterized in that: The double-link support frame (1) has an adjustable telescopic support column (32) symmetrically fixed to the surface of the rod body near the mounting frame (2) by a clamp. The adjustable telescopic support column (32) has a walking wheel (31) rotatably connected to the U-shaped groove at the bottom end by a rotating shaft.

3. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 2, characterized in that: The adaptive component includes a parallel four-bar linkage (44) and a hollow connecting block (42). An L-shaped bent rod (45) is fixedly connected to the surface of the hollow connecting block (42) by bolts. The L-shaped bent rod (45) is fixedly connected to the seed box (46). A first rotating rod (41) is symmetrically fixedly connected inside the mounting plate (4). A second rotating rod (43) is symmetrically fixedly connected inside the hollow connecting block (42). The height of the first rotating rod (41) is higher than that of the second rotating rod (43). The parallel four-bar linkage (44) is hinged between the first rotating rod (41) and the second rotating rod (43). An extension bracket (47) is symmetrically fixedly connected to the outer wall of the hollow connecting block (42) by bolts. The finger-clamp seeder (48) is rotatably connected between the two extension brackets (47) through a rotating shaft. A positioning bolt (49) is also symmetrically threaded on the side wall of the mounting plate (4). The installation position of the positioning bolt (49) is located below the upper connecting rod inside the parallel four-bar linkage (44).

4. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 3, characterized in that: The tensioning assembly includes a tension spring (55) and a control lever (54). The end of the L-shaped bent rod (45) is fixedly connected to a connecting frame (5). The bottom surface of the connecting frame (5) is rotatably connected to a hinge block (51). The bottom surface of the hinge block (51) is rotatably connected to a third rotating rod (53). The control lever (54) is rotatably sleeved on the surface of the third rotating rod (53), and the control lever (54) and the third rotating rod (53) are relatively slidably arranged. The soil covering wheel (52) is symmetrically rotatably connected to the side surface of the hinge block (51). The tension spring (55) is fixedly connected between the control lever (54) and the connecting frame (5). The upper surface of the hinge block (51) is provided with multiple limiting slots (56). The top end of the control lever (54) extends to the upper side of the hinge block (51). In the initial state, the control lever (54) is placed in the smooth groove of the limiting slot (56).

5. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 1, characterized in that: A two-way hydraulic cylinder (62) is fixedly installed at the center of the surface of the double-link support frame (1). The telescopic ends on both sides of the two-way hydraulic cylinder (62) are fixedly connected to mounting ears (63). The frame of the double-link support frame (1) is slidably fitted with movable sleeves (6) arranged in a symmetrical manner. The surface of each movable sleeve (6) is fixedly connected to a positioning block (61). The two mounting ears (63) are connected to the positioning block (61) by bolts.

6. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 1, characterized in that: Each L-shaped fixed column (7) is fixedly connected to a positioning frame (8) by a clamp. The inner wall of the positioning frame (8) is fixedly connected to a bean seed box (81) by bolts. A discharge pipe is fixedly connected to the bottom outlet of the bean seed box (81). An L-shaped support plate (82) is fixedly connected to the inner bottom surface of the positioning frame (8). A fourth rotating rod (83) is rotatably connected to the surface of the L-shaped support plate (82). A drive motor (84) is fixedly connected to the bottom surface of the L-shaped support plate (82). The drive motor (84) and the fourth rotating rod (83) are coaxially fixedly connected. A centrifugal spreading disc (87) is fixedly connected to the top of the fourth rotating rod (83). The centrifugal spreading disc (87) is located directly below the discharge pipe. Multiple guide strips (871) are fixedly connected to the surface of the centrifugal spreading disc (87) in a circular array.

7. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 6, characterized in that: The anti-clogging component includes a stirring rod (811) and a flexible stirring shaft (812). The stirring rod (811) is rotatably connected to the inner wall of the bean seed box (81). The flexible stirring shaft (812) is fixed at equal intervals to the rod body of the stirring rod (811). A Z-shaped frame (88) is fixedly connected to the surface of the L-shaped support plate (82). A fifth rotating rod (89) is rotatably connected to the surface of the Z-shaped frame (88). A first bevel gear (86) is fixedly connected to one end of the fifth rotating rod (89). A second bevel gear (85) is fixedly sleeved on the rod body of the fourth rotating rod (83). The first bevel gear (86) and the second bevel gear (85) are meshed together. One end of the stirring rod (811) extends to the outside of the bean seed box (81). A belt drive mechanism (810) is connected between the other end of the fifth rotating rod (89) and the end of the stirring rod (811) extending to the outside of the bean seed box (81).

8. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 1, characterized in that: Both the bean seed box (81) and the grass seed box (46) have a margin sensor (9) fixedly connected to their inner wall near the bottom.

9. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 1, characterized in that: The side wall of the mounting plate (4) is fixedly connected to a U-shaped mounting block (10). An adjusting column (11) is slidably provided on the inner wall surface of the U-shaped mounting block (10). A trencher (13) is fixedly connected to the bottom surface of the adjusting column (11). Multiple positioning holes are equally spaced on the surface of the adjusting column (11). The adjusting column (11) is connected to the U-shaped mounting block (10) by adjusting bolts (12).

10. The no-till reseeding machine for sandy land management based on seed and intelligent monitoring of rice and beans as described in claim 3, characterized in that: The surface of the first rotating rod (41) located above is rotatably connected to a hook lock (15). The bottom surface of the hook lock (15) is provided with a slot that matches the size of the second rotating rod (43). When the hook lock (15) is placed on the surface of the second rotating rod (43) located below, the finger-clamp seeder (48) does not work. The surface of the first rotating rod (41) located below is symmetrically rotatably connected to two tension springs (14). The bottom end of the tension spring (14) is connected to a locking piece (141) through a hook. The two connecting rods of the parallel four-bar linkage (44) located above are provided with locking grooves (142) at equal intervals. The locking piece (141) matches the locking groove (142).

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