A fertilizer distribution device with a regulating fertilizer distribution structure

Abstract

The utility model belongs to agricultural fertilization equipment technical field especially relates to a kind of fertilizer spreading device with adjusting type fertilizer spreading structure, including fertilizer storage bin, the fertilizer spreading structure of setting in the discharge end of fertilizer storage bin and the material pushing component for pushing fertilizer to discharge end for setting in the bottom of fertilizer storage bin, the fertilizer spreading structure includes rotating roller and the blade body of setting in several rotating roller terminal, adjustable connection is passed through being equipped with adjusting assembly between each blade body and rotating roller, the working angle of blade body is changed;Blade body is equipped with guide vane, and the sliding assembly is slidably connected between guide vane and blade body, for adjusting the length that guide vane projects.By adjusting assembly, the working angle of blade body can be flexibly adjusted to adapt to fertilizers of different particle sizes;By sliding assembly, the length that guide vane projects can be adjusted to adapt to planting scenarios of different row spacings and different widths, effectively solving the problem of poor adaptability of traditional fertilizer spreading device.

Description

Technical Field

[0001] This utility model relates to the field of agricultural fertilization equipment technology, specifically to a fertilization device with an adjustable fertilization structure. Background Technology

[0002] Currently, the fertilizer spreading devices used in agricultural production are mostly integral structures with fixed leaf angles and spreading ranges. Therefore, they cannot be flexibly adjusted according to fertilizer type, such as powder fertilizer, medium-granular fertilizer, large-granular fertilizer, and crop planting scenarios, such as densely planted crops, wide-row crops, and greenhouse crops.

[0003] Meanwhile, traditional fertilizer spreading devices are also susceptible to wind when applying powder fertilizer, have insufficient projection force when applying large granular fertilizer, and are prone to fertilizer overlap or incomplete coverage when applying fertilizer in fields with different row spacing. This leads to problems such as uneven spreading, fertilizer scattering and waste, and poor adaptability, which affect the fertilization effect and resource utilization rate.

[0004] Therefore, based on the above problems, it is necessary to make improvements. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a fertilizer spreading device with an adjustable fertilizer spreading structure, which can adjust the spreading angle and spreading radius to adapt to different fertilizer types and planting scenarios, thereby improving the uniformity of fertilizer spreading and resource utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fertilizer spreading device with an adjustable fertilizer spreading structure includes a fertilizer storage bin, a fertilizer spreading structure disposed at the discharge end of the fertilizer storage bin, and a feeding component disposed at the bottom of the fertilizer storage bin for pushing fertilizer to the discharge end. The fertilizer spreading structure includes a rotating roller and several blade bodies disposed at the end of the rotating roller. Each blade body is adjustablely connected to the rotating roller via an adjusting component to change the working angle of the blade body. A guide vane is disposed on the blade body, and the guide vane is slidably connected to the blade body via a sliding component to adjust the extension length of the guide vane.

[0008] Preferably, the adjustment assembly includes a base mounted on a rotating roller and a rotating shaft fixed at the root of the blade body. The blade body is rotatably mounted on the base via the rotating shaft. The base is provided with a positioning assembly, which includes a first positioning plate mounted on the base, a second positioning plate mounted on the blade body, and a locking member. The first and second positioning plates are provided with at least a plurality of positioning holes. The locking member is inserted into the corresponding positioning holes of the first and second positioning plates to fix the angle of the blade body.

[0009] Preferably, the locking element is a bolt or an elastic pin, and the positioning holes are distributed along the circumferential direction of the rotation axis, with the central angle between adjacent positioning holes being 5° to 30°.

[0010] Preferably, the sliding assembly includes a groove disposed on one side of the blade body and a slider disposed at the root of the guide vane, the slider and the groove forming a sliding fit, the groove extending along the length direction of the blade body; a positioning plate is provided on one side of the guide vane, and a fixing hole is provided below the positioning plate on the blade body, the fixing holes being spaced apart along the length direction of the blade body; through holes adapted to the fixing holes are provided on the positioning plate, and the through holes are connected to any fixing hole by fasteners to fix the extension length of the guide vane.

[0011] Preferably, the guide vane includes a fixed part and a movable part, the fixed part being fixedly connected to the rotating roller, and the movable part being slidably connected to the blade body.

[0012] Preferably, the system further includes an engine, a first transmission assembly, and a second transmission assembly; the output end of the engine is driven to the first transmission assembly via a belt, and the first transmission assembly is driven to the second transmission assembly via a chain; the first transmission assembly is used to drive the fertilizer spreading structure, and the second transmission assembly is used to drive the material feeding assembly.

[0013] Preferably, the first transmission assembly includes a first transmission wheel and a first transmission shaft. The transmission wheel and the first transmission shaft are coaxially and fixedly connected. The output end of the engine is driven by the first transmission wheel through a belt, which drives the first transmission wheel to rotate and drives the transmission shaft connected to the first transmission wheel to rotate. A driving bevel gear is coaxially and fixedly connected to the first transmission shaft, and a driven bevel gear that meshes with the driving bevel gear is provided on the rotating roller. The first transmission shaft drives the rotating roller to rotate through the cooperation of the driving bevel gear and the driven bevel gear.

[0014] Preferably, the second transmission assembly includes a second transmission wheel and a ratchet mechanism. A transmission gear is coaxially fixedly connected to one side of the first transmission wheel, and the transmission gear is driven to rotate the second transmission wheel via a chain. The ratchet mechanism includes a transmission arm, a ratchet, and a return spring. A double-bearing eccentric wheel is provided off-center on the second transmission wheel. A drive pawl that cooperates with the ratchet is provided on the transmission arm. An elastic element is provided between the drive pawl and the transmission arm to keep the drive pawl in contact with the ratchet. A limiting pawl is provided above the ratchet. One end of the return spring is connected to the limiting pawl, and the other end is connected to the transmission arm. When the second transmission wheel rotates, its double-bearing eccentric wheel pushes the transmission arm to swing. When the transmission arm swings, the drive pawl drives the ratchet to rotate intermittently in one direction. The return spring resets the transmission arm after the pushing action of the double-bearing eccentric wheel disappears to achieve reciprocating swing. A second transmission shaft is coaxially fixedly connected to the ratchet, and a drive gear on the second transmission shaft drives the material feeding assembly to work.

[0015] Preferably, the feeding assembly includes a feeding chain and feeding push rods that are driven and connected to the drive gear. The feeding chains are symmetrically arranged on both sides of the bottom of the fertilizer storage bin, and a number of feeding push rods are arranged between the feeding chains on both sides. The feeding push rods push the fertilizer in the fertilizer storage bin toward the fertilizer spreading structure, and the fertilizer spreading structure spreads the fertilizer outward.

[0016] Preferably, the rotating roller is provided with spiral blades for breaking up the fertilizer.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: the working angle of the blade body can be flexibly adjusted by adjusting the component to adapt to fertilizers of different particle sizes; the extension length of the guide vane can be adjusted by the sliding component to adapt to planting scenarios with different row spacing and width, effectively solving the problem of poor adaptability of traditional fertilizer spreading devices. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the fertilizer spreading structure in this utility model;

[0020] Figure 3 This is a schematic diagram of the transmission mechanism in this utility model;

[0021] Figure 4 This is a schematic diagram of the material feeding assembly in this utility model;

[0022] Figure 5 This is another structural schematic diagram of the transmission mechanism in this utility model;

[0023] In the diagram, 1. Fertilizer storage bin, 2. Fertilizer spreading structure, 3. Feeding assembly, 4. Rotating roller, 5. Blade body, 6. Guide vane, 7. Base, 8. Rotating shaft, 9. First positioning plate, 10. Second positioning plate, 11. Positioning hole, 12. Slide groove, 13. Through hole, 14. Positioning piece, 15. Fixing hole, 16. Fixing part, 17. Moving part, 18. Limiting pawl, 19. Engine, 20. First transmission wheel, 21. First transmission shaft, 22. Driving bevel gear, 23. Driven bevel gear, 24. Second transmission wheel, 25. Transmission gear, 26. Transmission arm, 27. Ratchet, 28. Return spring, 29. Double bearing eccentric wheel, 30. Drive pawl, 31. Second transmission shaft, 32. Drive gear, 33. Feeding chain, 34. Feeding push rod, 35. Spiral blade. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] It should be noted that when a component / part is referred to as being "set on" another component / part, it can be directly set on the other component / part or there may be an intervening component / part. When a component / part is referred to as being "connected / linked" to another component / part, it can be directly connected / linked to the other component / part or there may be an intervening component / part. The term "connected / linked" as used herein can include electrical and / or mechanical physical connections / links. The term "including / comprises" as used herein means the presence of a feature, step, or component / part, but does not exclude the presence or addition of one or more other features, steps, or components / parts. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Please see Figures 1 to 5 The fertilizer spreading device shown includes a fertilizer storage bin 1, a fertilizer spreading structure 2, a feeding assembly 3, and a transmission mechanism.

[0027] like Figure 1 and Figure 2 As shown, the fertilizer spreading structure 2 is located at the discharge end of the fertilizer storage bin 1. It includes a rotating roller 4 and several blade bodies 5. The blade bodies 5 are evenly distributed along the circumference of the rotating roller 4 to ensure even fertilizer coverage. The rotating roller 4 is also equipped with spiral blades 35, which extend along the axial direction of the rotating roller 4. When the rotating roller 4 rotates, it can break up the fertilizer falling from the discharge end of the fertilizer storage bin 1 to prevent clumps of fertilizer from affecting the uniformity of fertilizer spreading.

[0028] like Figure 2As shown, each blade body 5 is adjustablely connected to the rotating roller 4 via an adjustment assembly. The adjustment assembly includes a base 7 fixed on the rotating roller 4 and a rotating shaft 8 fixed at the root of the blade body 5. The blade body 5 is rotatably mounted on the base 7 via the rotating shaft 8 and can rotate flexibly around the rotating shaft 8. A positioning assembly is provided between the base 7 and the blade body 5. The positioning assembly includes a first positioning plate 9 set on the base 7, a second positioning plate 10 set on the blade body 5, and a locking member. The first positioning plate 9 and the second positioning plate 10 are provided with at least a plurality of positioning holes 11. The locking member is inserted into the corresponding positioning holes 11 of the first positioning plate 9 and the second positioning plate 10 to fix the angle of the blade body 5. The positioning holes 11 are evenly distributed along the circumferential direction of the rotating shaft 8, and the central angle of adjacent positioning holes 11 is 5° to 30°. The locking element can be a bolt or a flexible pin. When the blade body 5 rotates to the corresponding angle, the locking element, such as a bolt, is inserted into the positioning hole 11 at the corresponding position of the first positioning plate 9 and the second positioning plate 10, thereby locking the blade body 5 at the corresponding working angle to meet the projection requirements of different fertilizers.

[0029] In practical use, parameters can be flexibly adjusted for different fertilizer types and planting scenarios:

[0030] When applying powdered organic fertilizer with a particle size of 0.5-1mm, adjust the leaf body 5 to 5°. At this time, the leaf's projection force is gentle, which can reduce the powder fertilizer from being scattered by the wind. With the guide plate 6 extending 30mm, it is suitable for greenhouse pepper planting with a row spacing of 40cm. The fertilizer spreading width is controlled within 1.2m to avoid fertilizer being wasted by spilling into the gaps between the greenhouse frame.

[0031] When applying compound fertilizer granules with a particle size of 2-3mm, adjust the angle of the leaf body 5 to 20°. A medium projection angle can ensure that the granular fertilizer is evenly diffused. The guide plate 6 extends 60mm, which is suitable for wheat fields with a row spacing of 60cm. The fertilizer spreading width reaches 2.5m, which meets the full coverage requirements of conventional field crops.

[0032] When applying slow-release fertilizer granules with a particle size of 5-8mm, adjust the angle of the leaf body 5 to 35° to increase the projection force and ensure the projection distance of the large-particle fertilizer; the guide plate 6 extends 120mm, which is suitable for cornfields with a row spacing of 1.2m, and the fertilizer spreading width can reach 4m, achieving precise coverage between rows of crops with wide row spacing.

[0033] In addition, in the orchard ring fertilization scenario, the three leaf bodies 5 on one side can be adjusted to 30° and the guide vane 6 can be extended to 90mm, while the three leaf bodies 5 on the other side can be adjusted to 0° and the guide vane 6 can be retracted, forming a directional fertilization mode. The fertilizer is concentrated and projected to a range of 1.5m around the fruit trees, reducing fertilizer waste in non-planting areas.

[0034] The elastic locking pin consists of a pin body, a compression spring, and a limiting nut. The head of the pin body is hemispherical with an annular boss in the middle and a threaded rod at the tail. The second positioning plate 10 on the blade body 5 has a positioning hole 11. The compression spring is sleeved on the tail of the pin body, with one end abutting against the annular boss in the middle of the pin body and the other end abutting against the second positioning plate 10. During assembly, the tail of the pin body passes through the positioning hole 11 on the second positioning plate 10, and the limiting nut locks the tail of the pin body through the second positioning plate 10. In its natural state, the compression spring pushes the head of the pin body into the positioning hole 11. When adjusting the angle, the compression spring at the tail of the pin body is pulled outward, and the head disengages from the positioning hole 11 on the first positioning plate 9. After rotating the blade body 5 to the target angle, the spring is released, and the compression spring resets, pushing the head back into the corresponding positioning hole 11 on the first positioning plate 9, achieving quick locking.

[0035] like Figure 2 As shown, a guide vane 6 is provided on the blade body 5. The guide vane 6 and the blade body 5 are slidably connected by a sliding assembly to adjust the extension length of the guide vane 6. The sliding assembly includes a groove 12 on one side of the blade body 5 and a slider at the root of the guide vane 6 (the slider is not labeled in the views because it is located at the root and is obscured; the slider is a conventional sliding assembly that cooperates with the groove 12). The slider and the groove 12 form a sliding fit. The groove 12 extends along the length of the blade body 5. A positioning piece 14 is provided on one side of the guide vane 6. The blade body 5 has fixing holes 15 below the positioning piece 14. The fixing holes 15 are spaced apart along the length of the blade body 5. The positioning piece 14 has through holes 13 that are adapted to the fixing holes 15. The through holes 13 are connected to any fixing hole 15 by fasteners to fix the extension length of the guide vane 6.

[0036] The guide vane 6 includes a fixed part 16 and a movable part 17. The fixed part 16 is fixedly connected to the rotating roller 4, and the movable part 17 is slidably connected to the blade body 5 through a sliding assembly.

[0037] like Figure 4 As shown, the feeding assembly 3 is located at the bottom of the fertilizer storage bin 1 and is used to push the fertilizer towards the discharge end. It includes a feeding chain 33 and feeding pushers 34. The feeding chains 33 are symmetrically arranged on both sides of the bottom of the fertilizer storage bin 1. Several feeding pushers 34 are horizontally connected between the feeding chains 33 on both sides. The feeding pushers 34 rotate with the feeding chains 33 and can evenly and continuously push the fertilizer in the fertilizer storage bin 1 towards the fertilizer spreading structure 2 to ensure a stable fertilizer supply.

[0038] like Figure 3As shown, the transmission mechanism consists of an engine 19, a first transmission assembly, and a second transmission assembly, which provides power to the fertilizer spreading structure 2 and the material dispensing assembly 3 and enables them to operate in tandem. The output end of the engine 19 is driven to the first transmission assembly via a belt. The first transmission assembly includes a first transmission wheel 20 and a first transmission shaft 21. The first transmission wheel 20 and the first transmission shaft 21 are coaxially and fixedly connected. When the engine 19 is running, it drives the first transmission wheel 20 to rotate via the belt, thereby driving the first transmission shaft 21 to rotate synchronously.

[0039] A drive bevel gear 22 is coaxially fixedly connected to the first drive shaft 21, and a driven bevel gear 23 that meshes with the drive bevel gear 22 is provided on the rotating roller 4. The first drive shaft 21 transmits power to the rotating roller 4 through the meshing of the drive bevel gear 22 and the driven bevel gear 23, thereby driving the rotating roller 4 to rotate stably.

[0040] A transmission gear 25 is coaxially fixedly connected to one side of the first transmission wheel 20. The transmission gear 25 is driven by a chain to the second transmission assembly. The second transmission assembly includes a second transmission wheel 24 and a ratchet mechanism. The first transmission wheel 20 is coaxially fixedly connected to one side of the transmission gear 25. The transmission gear 25 is driven by a chain to the second transmission wheel 24, causing the second transmission wheel 24 to rotate. The ratchet mechanism includes a transmission arm 26, a ratchet 27, and a return spring 28. The second transmission wheel 24 is provided with a double-bearing eccentric wheel 29 off-center from the axis. The transmission arm 26 is provided with a driving pawl 30 that cooperates with the ratchet 27. An elastic element, which is a spring, is provided between the pawl 30 and the transmission arm 26 to keep the driving pawl 30 in contact with the ratchet 27. A limiting pawl 18 is provided above the ratchet 27. One end of the return spring 28 is connected to the limiting pawl 18, and the other end is connected to the transmission arm 26. When the second transmission wheel 24 rotates, its double-bearing eccentric wheel 29 will periodically push the transmission arm 26 to swing. When the transmission arm 26 swings, it drives the ratchet 27 to rotate intermittently in one direction through the pawl. When the pushing effect of the double-bearing eccentric wheel 29 on the transmission arm 26 disappears, the return spring 28 will pull the transmission arm 26 to return to its original position, realizing the reciprocating swing of the transmission arm 26.

[0041] When the drive arm 26 swings, the drive pawl 30 pushes the ratchet 27 to rotate. The limit pawl 18 is pulled by the return spring 28 to keep it in contact with the ratchet 27 and embedded in the tooth groove of the ratchet 27 to prevent reverse rotation. After the double bearing eccentric wheel 29 rotates past its apex, the return spring 28 pulls the drive arm 26 to reset, and the drive pawl 30 slides along the tooth surface of the ratchet 27 to the next tooth groove under the action of the torsion spring. During this process, the second drive shaft 31 rotates intermittently with the ratchet 27, driving the drive gear 32 to drive the feeding chain 33, so that the feeding push rod 34 pushes fertilizer intermittently. For example, each push corresponds to the rotation roller 4 rotating 2 revolutions, ensuring that the feeding and spreading rhythm are matched.

[0042] The ratchet 27 is coaxially fixedly connected to the second transmission shaft 31, and the second transmission shaft 31 is provided with a drive gear 32. The drive gear 32 is driven to drive the feeding chain 33. The power transmitted by the ratchet 27 mechanism drives the feeding chain 33 to rotate, thereby realizing the operation of the feeding assembly 3.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fertilizer spreading device with an adjustable fertilizer spreading structure, comprising a fertilizer storage bin (1), a fertilizer spreading structure (2) disposed at the discharge end of the fertilizer storage bin (1), and a feeding assembly (3) disposed at the bottom of the fertilizer storage bin (1) for pushing fertilizer to the discharge end, characterized in that, The fertilizer spreading structure (2) includes a rotating roller (4) and several blade bodies (5) disposed at the end of the rotating roller (4). Each blade body (5) is adjustablely connected to the rotating roller (4) through an adjustment component to change the working angle of the blade body (5). A guide vane (6) is provided on the blade body (5). The guide vane (6) is slidably connected to the blade body (5) through a sliding component to adjust the length of the guide vane (6) extending out.

2. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 1, characterized in that, The adjustment assembly includes a base (7) on the rotating roller (4) and a rotating shaft (8) fixed at the root of the blade body (5). The blade body (5) is rotatably mounted on the base (7) via the rotating shaft (8). A positioning assembly is provided between the base (7) and the blade body (5). The positioning assembly includes a first positioning plate (9) on the base (7), a second positioning plate (10) on the blade body (5), and a locking member. The first positioning plate (9) and the second positioning plate (10) are provided with at least a plurality of positioning holes (11). The locking member is inserted into the corresponding positioning holes (11) of the first positioning plate (9) and the second positioning plate (10) to fix the angle of the blade body (5).

3. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 2, characterized in that, The locking element is a bolt or a resilient pin, and the positioning holes (11) are distributed along the circumferential direction of the rotation axis (8), with the central angle between adjacent positioning holes (11) being 5° to 30°.

4. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 1, characterized in that, The sliding assembly includes a groove (12) on one side of the blade body (5) and a slider at the root of the guide vane (6). The slider and the groove (12) form a sliding fit. The groove (12) extends along the length of the blade body (5). A positioning plate (14) is provided on one side of the guide vane (6). A fixing hole (15) is provided below the positioning plate (14) on the blade body (5). The fixing holes (15) are spaced apart along the length of the blade body (5). Through holes (13) adapted to the fixing holes (15) are provided on the positioning plate (14). The through holes (13) and any fixing hole (15) are connected by fasteners to fix the extension length of the guide vane (6).

5. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 4, characterized in that, The guide vane (6) includes a fixed part (16) and a movable part (17). The fixed part (16) is fixedly connected to the rotating roller (4), and the movable part (17) is slidably connected to the blade body (5).

6. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 1, characterized in that, It is also provided with a transmission mechanism, which includes an engine (19), a first transmission component and a second transmission component; the output end of the engine (19) is driven to the first transmission component via a belt, and the first transmission component is driven to the second transmission component via a chain. The first transmission component is used to drive the fertilizer spreading structure (2), and the second transmission component is used to drive the material feeding component (3).

7. A fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 6, characterized in that, The first transmission assembly includes a first transmission wheel (20) and a first transmission shaft (21). The first transmission wheel (20) is coaxially and fixedly connected to the first transmission shaft (21). The output end of the engine (19) is driven to rotate by the first transmission wheel (20) via a belt, and drives the first transmission wheel (20) to rotate, and drives the first transmission shaft (21) connected to the first transmission wheel (20) to rotate. A driving bevel gear (22) is coaxially and fixedly connected on the first transmission shaft (21). A driven bevel gear (23) meshes with the driving bevel gear (22) on the rotating roller (4). The first transmission shaft (21) drives the rotating roller (4) to rotate through the cooperation of the driving bevel gear (22) and the driven bevel gear (23).

8. The fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 7, characterized in that, The second transmission assembly includes a second transmission wheel (24) and a ratchet mechanism. A transmission gear (25) is coaxially fixedly connected to one side of the first transmission wheel (20). The transmission gear (25) is driven to rotate the second transmission wheel (24) via a chain. The ratchet mechanism includes a transmission arm (26), a ratchet (27), and a return spring (28). A double-bearing eccentric wheel (29) is provided off-center on the second transmission wheel (24). A drive pawl (30) that cooperates with the ratchet (27) is provided on the transmission arm (26). An elastic element is provided between the drive pawl (30) and the transmission arm (26) to keep the drive pawl (30) in contact with the ratchet (27). A limiting pawl (18) is provided above the wheel (27). One end of the return spring (28) is connected to the limiting pawl (18), and the other end is connected to the transmission arm (26). When the second transmission wheel (24) rotates, its double bearing eccentric wheel (29) pushes the transmission arm (26) to swing. When the transmission arm (26) swings, it drives the ratchet (27) to rotate intermittently in one direction through the driving pawl (30). After the pushing action of the double bearing eccentric wheel (29) disappears, the return spring (28) resets the transmission arm (26) to achieve reciprocating swing. The ratchet (27) is coaxially fixedly connected to a second transmission shaft (31). A drive gear (32) is provided on the second transmission shaft (31) to drive the feeding assembly (3) to work.

9. A fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 8, characterized in that, The feeding assembly (3) includes a feeding chain (33) and feeding push rods (34) that are driven and connected to the drive gear (32). The feeding chain (33) is symmetrically arranged on both sides of the bottom of the fertilizer storage bin (1). Several feeding push rods (34) are provided between the feeding chains (33) on both sides. The feeding push rods (34) push the fertilizer in the fertilizer storage bin (1) toward the fertilizer spreading structure (2) and spread the fertilizer outward through the fertilizer spreading structure (2).

10. A fertilizer spreading device with an adjustable fertilizer spreading structure according to claim 1, characterized in that, The rotating roller (4) is provided with spiral blades (35) for breaking up the fertilizer.

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