A solid fertilizer application device

Abstract

The present application relates to the technical field of agricultural machinery, and discloses a solid fertilizer application device, which comprises a fixing frame in a hollow frame structure, a scattering outlet is arranged at the front end of the fixing frame, and a detachable interface for connecting with a towing vehicle is arranged at the rear end of the fixing frame; a fertilizer storage box is movably arranged on the upper end of the fixing frame through an arcuate rod group, and a discharge port is arranged at the bottom of the fertilizer storage box; the device is a small solid fertilizer application device, which is specially designed for complex terrains such as hillside land, terraced fields, small farmlands and internal facilities of facility agriculture which cannot be accessed by large agricultural machinery, and has compact overall size and light weight, so that the device can be flexibly installed on an electric tricycle or a small hand-drawn cart, freely moves in narrow and rugged land, and greatly expands the application range of mechanical fertilization.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a solid fertilizer application device. Background Technology

[0002] With the adjustment of agricultural planting structure and the advancement of land transfer, hilly and mountainous areas, terraced fields, small plots of farmland, and facilities for agriculture still generally suffer from low levels of mechanization. These plots are small, with undulating terrain and narrow field roads, making it difficult for large tractors and their associated wide-width fertilizer spreaders to enter or turn around, resulting in a long-term reliance on manual fertilization. Manual spreading is not only labor-intensive and inefficient, but also difficult to ensure even application, easily leading to localized over- or under-fertilization, affecting crop growth and yield. Therefore, there is an urgent market demand for miniaturized, lightweight fertilizer spreading devices that can be adapted to common small-powered chassis (such as electric tricycles and small hand tractors).

[0003] Most existing small solid fertilizer spreading devices adopt a fixed structure, directly welded or rigidly connected to the towing vehicle, making disassembly and assembly difficult and unable to be quickly transferred between different vehicles. Although some devices are designed with a detachable structure, they often use ordinary bolts for connection, requiring tools to tighten multiple bolts each time they are installed and disassembled, which is time-consuming and laborious, making it difficult to achieve the convenience of "install and disassemble as needed".

[0004] Regarding fertilizer adaptability, existing small-scale fertilizer spreading devices are mostly designed for granular compound fertilizers with good flowability, and their discharge ports and spreading mechanisms are relatively simple. However, in actual agricultural production, farmers may also use fertilizers of various forms and with significant differences in flowability, such as powdered fertilizers, organic fertilizers, and farmyard manure. These fertilizers are prone to "bridging" or "arching" in the storage tank, leading to interruptions in the dispensing process. Traditional devices lack effective anti-clogging structures, requiring frequent manual stirring during operation, which seriously affects operational efficiency and spreading uniformity.

[0005] In conclusion, developing a small solid fertilizer spreading device that is simple in structure, easy to assemble and disassemble, and reliable in preventing blockages is of great practical significance for solving the problem of mechanized fertilization in hilly and mountainous areas and small plots. Summary of the Invention

[0006] The purpose of this invention is to provide a solid fertilizer application device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a solid fertilizer application device, comprising:

[0008] The fixed frame has a hollow frame structure. The front end of the fixed frame is provided with a spreading outlet, and the rear end of the fixed frame is provided with an interface that can be detachably connected to a towing vehicle.

[0009] The fertilizer storage box is buoyantly mounted on the upper end of the fixed frame via an arched rod assembly, and the bottom of the fertilizer storage box is provided with a discharge port;

[0010] An anti-bridging component is fixedly installed on the arched rod group and located inside the fertilizer storage box. When the fertilizer storage box floats relative to the arched rod group, the anti-bridging component moves relative to the inner wall of the fertilizer storage box and the fertilizer inside, thereby destroying the arched bridge structure formed by the fertilizer.

[0011] A fertilizer discharge regulator is installed at the discharge port at the bottom of the fertilizer storage tank and is used to quantitatively adjust the discharge amount.

[0012] The spreading component is fixedly installed inside the fixed frame and located directly below the discharge port, and is used to spread the fertilizer falling from the discharge port outward through the spreading outlet;

[0013] The fertilizer storage box is buoyed by the arched rod group relative to the fixed frame and the anti-bridging assembly, thereby achieving passive relative movement between the anti-bridging assembly and the fertilizer storage box.

[0014] According to the above technical solution, the fixing frame includes an outer ring hollow tube, a vertical support tube, and reinforcing ribs. The outer ring hollow tube is rectangular in shape and consists of a central outer section and a vertically bent section perpendicular to the central outer section. The vertical support tubes are mirror-symmetrically arranged on both sides of the central outer section of the outer ring hollow tube. The top of the vertical support tube is provided with a U-shaped slot and a quick-locking device for cooperating with the frame of a tractor or tricycle. The reinforcing ribs are inclinedly arranged in the vertically bent section and their ends are respectively fixedly connected to the upper and lower ends of the outer ring hollow tube.

[0015] According to the above technical solution, the fertilizer storage tank includes:

[0016] The main floating tank has a storage chamber inside, a conical feed hopper at the top, and a sealing cover hinged to the top of the conical feed hopper and an inclined guide surface at the bottom.

[0017] A fixed discharge section is fixedly installed at the center of the fixed frame, and the fertilizer output regulator is installed inside the fixed discharge section;

[0018] The flexible connecting channel is connected at the top to the discharge end of the main floating box and at the bottom to the inlet end of the fixed discharge section.

[0019] According to the above technical solution, the arched rod assembly includes:

[0020] The first arched rod is fixed at both ends to the top of the vertically bent sections on both sides of the outer ring hollow tube, and the middle section of the first arched rod is movably disposed at the upper part of the main floating box from a high position.

[0021] The second arched rod is fixedly installed at both ends on the top of the vertically bent sections on both sides of the outer ring hollow tube, and the middle section of the second arched rod is movably installed through the lower part of the main floating box.

[0022] The second arched rod is installed at a lower vertical height than the first arched rod, so that the first arched rod and the second arched rod form a staggered through-support structure on the main floating box, so as to stably support the main floating box and allow it to slide along the first arched rod and the second arched rod.

[0023] According to the above technical solution, the main floating box is movably mounted on the first arched rod and the second arched rod via a micro-floating component, the micro-floating component comprising:

[0024] A movable sleeve is embedded in the side wall of the main floating tank. The movable sleeve is movably sleeved on the first arched rod and the second arched rod. An outer cover is bolted to both ends of the movable sleeve.

[0025] A floating limiting plate is embedded in the first arched rod and the second arched rod, and is located inside the corresponding movable sleeve;

[0026] Floating springs are arranged in a mirror image symmetrically on both sides of the floating limiting plate, with the ends of the floating springs abutting against the inner wall of the corresponding outer cover.

[0027] According to the above technical solution, the anti-bridging component includes:

[0028] The main anti-frame rod has fixed sleeves at both ends, which are fixedly sleeved onto the first arched rod and the second arched rod, respectively. The main anti-frame rod is installed in an inclined position inside the main floating box. The two sides of the main anti-frame rod are respectively close to the front and rear inner walls of the main floating box, and a gap is maintained between the main anti-frame rod and the inner wall of the main floating box so as not to interfere with the floating range of the main floating box.

[0029] A high-elasticity polyurethane forked rod is fixedly installed on the side wall of the main pole of the anti-frame and is spirally distributed along the axial direction of the main pole of the anti-frame. The cross-section of the high-elasticity polyurethane forked rod is designed to be thick at the root and thin at the end, and the end has a small ball head or flat shovel.

[0030] According to the above technical solution, the fixed discharge section includes:

[0031] The fixed seat is fixedly installed between the outer ring hollow tubes by a fixed support rod, and the fertilizer output regulator is set inside the fixed seat;

[0032] The detachable discharge end is detachably connected to the lower end of the fixed base. The detachable discharge end is configured as a smooth funnel-shaped discharge end, an electric impeller-shaped discharge end, or a wide groove-shaped discharge end.

[0033] According to the above technical solution, the fertilizer output regulator includes:

[0034] A transverse insert plate is disposed through the fixed base, with one end of the transverse insert plate extending to the inner wall of the fixed base and the other end fixedly installed with an outer edge section.

[0035] An electric telescopic cylinder is fixedly installed on the outer wall of the fixed base, and the output end of the electric telescopic cylinder is fixedly installed on the side wall of the transverse insert plate.

[0036] According to the above technical solution, the application component includes:

[0037] The base is fixedly installed between the outer ring hollow tubes by side support rods;

[0038] A centrifugal spraying disc is movably mounted on the upper end of the base via a rotating shaft;

[0039] A servo motor is fixedly installed at the lower end of the base, and the output end of the servo motor is fixedly connected to the rotating shaft.

[0040] According to the above technical solution, the application component further includes:

[0041] The fertilizer splash guard consists of an arc-shaped shielding part and a movable adjustment part. The arc-shaped shielding part is fixedly installed on the upper end of the base. The movable adjustment parts are symmetrically arranged on both sides of the arc-shaped shielding part. An adjustable opening is formed between the two movable adjustment parts, and the adjustable opening is oriented towards the application outlet of the fixed frame.

[0042] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0043] (1) This device is a small solid fertilizer application device, which is specially designed for complex terrains such as hillsides, terraces, small plots of farmland and facilities agriculture that large agricultural machinery cannot enter. It is compact in size and lightweight, and can be flexibly installed on electric tricycles or small hand trailers. It can move freely in narrow and rugged plots, greatly expanding the scope of application of mechanized fertilization and solving the problem that traditional large fertilizer spreaders "cannot enter or turn".

[0044] (2) This device adopts a modular and detachable design. The rear end of the fixed frame is equipped with an interface that can be detachably connected to the towing vehicle. With the U-shaped slot and quick locking device at the top of the vertical support pipe, it can be installed or removed from an electric tricycle or a small hand trailer within minutes. At the same time, it can be reinforced by adding bolts, which not only ensures the stability during operation, but also realizes the convenience of "installing and removing as needed". It is very suitable for users to share and use among multiple towing vehicles or store them during the off-season.

[0045] (3) This device has a unique passive automatic anti-blocking mechanism. It does not require any external power or sensors and is driven entirely by the left and right vibrations caused by uneven road surfaces during the movement of the traction vehicle. The first arched rod and the second arched rod form a horizontal double-rod support structure with staggered heights, which allows the main floating box to float smoothly left and right along the axis of the rod, while forcing the main anti-frame rod to tilt. The two sides of the main anti-frame rod are set close to the left and right inner walls of the main floating box. During the left and right floating process, it repeatedly scrapes the internal fertilizer, effectively preventing the fertilizer from sticking to the wall and forming bridging support points. Moreover, the tilted posture allows the main anti-frame rod and its high-elasticity polyurethane bifurcated rod to repeatedly scratch the fertilizer layer at a changing cutting angle, covering the entire transverse section of the box, realizing a large-scale, dead-angle-free passive automatic arch breaking, significantly reducing the risk of fertilizer blockage and ensuring the continuity of operation.

[0046] (4) The high-elasticity polyurethane bifurcation rod adopts a spiral distribution and a cross-section design with a thick root and a thin end. The end has a small ball head or a flat shovel. Combined with the elastic deformation and rebound characteristics of the high-elasticity polyurethane material itself, it can generate micro-vibrations during left and right floating. It can cut into, pry or cut off the arch bridge structure formed in the fertilizer from multiple directions. Even for organic fertilizers and powdered fertilizers that are wet, easy to clump or have poor flowability, it can efficiently destroy the arch bridge and restore the flow of fertilizer, which greatly improves the adaptability of the device to different types of solid fertilizers.

[0047] (5) This device is equipped with a fertilizer output regulator. The opening of the discharge port is precisely controlled by the electric telescopic cylinder driving the horizontal insert plate, so as to realize stepless or graded quantitative adjustment of the output. Users can conveniently set the fertilizer application amount according to the crop type, growth stage, soil fertility and agronomic requirements to avoid waste or insufficient fertilization. At the same time, the lower end of the fixed discharge section can be quickly replaced with different types of detachable discharge ends such as smooth funnel type, electric impeller type or wide trough type, which are suitable for granular fertilizer, powder fertilizer and coarse organic fertilizer respectively, realizing one machine for multiple uses and greatly expanding the application scenarios.

[0048] (6) The device has a simple overall structure and few parts. The main frame is welded from an outer hollow tube, vertical support tubes, and reinforcing ribs. The functional components are modularly arranged, resulting in low manufacturing costs and convenient maintenance. The main floating tank is connected to the fixed discharge section through a flexible connection channel, which allows the main floating tank to float freely while ensuring the sealing of fertilizer transportation, avoiding the jamming or leakage problems that may be caused by traditional rigid connections. The entire device has high reliability and is suitable for long-term operation in harsh field environments. Attached Figure Description

[0049] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is a first perspective view of the present invention;

[0051] Figure 2 This is a second perspective view of the present invention;

[0052] Figure 3 This is a third perspective view of the present invention;

[0053] Figure 4 This is a fourth perspective schematic diagram of the present invention;

[0054] Figure 5 This is the fifth perspective schematic diagram of the present invention;

[0055] Figure 6 This is a first partial three-dimensional schematic diagram of the present invention;

[0056] Figure 7 This is a second partial perspective view of the present invention;

[0057] Figure 8 This is a third partial perspective view of the present invention;

[0058] Figure 9 This is a fourth partial perspective view of the present invention;

[0059] In the diagram: 1-Fixed frame, 11-Outer ring hollow tube, 111-Central outer section, 112-Vertical bending section, 12-Vertical support pipe, 13-Reinforcing rib, 2-Fertilizer storage box, 21-Main floating box, 211-Conical feed hopper, 212-Sealing cover, 213-Inclined guide surface, 22-Fixed discharge section, 221-Fixed seat, 222-Fixed support rod, 223-Removable discharge end, 23-Flexible connection channel, 3-Anti-bridging assembly, 31-Anti-bridging main rod, 32-Fixed sleeve, 33-High elastic polyurethane sub-assembly 4-Fertilizer dispensing regulator, 41-Transverse insert plate, 411-Outer edge section, 42-Electric telescopic cylinder, 5-Spreading assembly, 51-Base, 52-Centrifugal spreading disc, 53-Servo motor, 54-Side support rod, 55-Fertilizer splash guard, 551-Arched shield, 552-Modible adjustment part, 553-Adjustable opening, 6-Arch-shaped rod assembly, 61-First arch-shaped rod body, 62-Second arch-shaped rod body, 7-Micro-floating assembly, 71-Modible sleeve, 72-Outer cover, 73-Floating limit plate, 74-Floating spring. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figure 1-9 The present invention provides a technical solution: a solid fertilizer application device, comprising:

[0062] The fixing frame 1 has a hollow frame structure. The front end of the fixing frame 1 is provided with a spreading outlet, and the rear end of the fixing frame 1 is provided with an interface that can be detachably connected to a towing vehicle.

[0063] The fertilizer storage box 2 is buoyantly mounted on the upper end of the fixed frame 1 via the arched rod assembly 6, and the bottom of the fertilizer storage box 2 is provided with a discharge port;

[0064] The anti-bridging component 3 is fixedly installed on the arched rod group 6 and located inside the fertilizer storage box 2. When the fertilizer storage box 2 floats relative to the arched rod group 6, the anti-bridging component 3 moves relative to the inner wall of the fertilizer storage box 2 and the fertilizer inside, thereby destroying the arch bridge structure formed by the fertilizer.

[0065] The fertilizer output regulator 4 is located at the discharge port at the bottom of the fertilizer storage tank 2 and is used to quantitatively adjust the output.

[0066] The spreading component 5 is fixedly installed inside the fixing frame 1 and located directly below the discharge port, and is used to spread the fertilizer falling from the discharge port outward through the spreading outlet;

[0067] The fertilizer storage box 2 floats relative to the fixed frame 1 and the anti-bridging assembly 3 through the arched rod group 6, thereby realizing the passive relative movement between the anti-bridging assembly 3 and the fertilizer storage box 2.

[0068] Specifically, the fixing frame 1 includes an outer ring hollow tube 11, a vertical support tube 12, and a reinforcing rib 13. The outer ring hollow tube 11 is generally rectangular in shape and consists of a central outer section 111 and a vertically bent section 112 perpendicular to the central outer section 111. The vertical support tube 12 is mirror-symmetrically arranged on both sides of the central outer section 111 of the outer ring hollow tube 11. The top of the vertical support tube 12 is provided with a U-shaped slot 121 that cooperates with the frame of a tractor or tricycle and a quick locking device. The reinforcing rib 13 is inclinedly arranged in the vertically bent section 112 and its ends are respectively fixedly connected to the upper and lower ends of the outer ring hollow tube 11.

[0069] Specifically, the fertilizer storage tank 2 includes:

[0070] The main floating tank 21 has a storage cavity inside, a conical feed hopper 211 on the top, and a sealing cover 212 is hinged to the top of the conical feed hopper 211. An inclined guide surface 213 is provided at the bottom.

[0071] The fixed discharge section 22 is fixedly installed in the center of the fixed frame 1, and the fertilizer output regulator 4 is installed inside the fixed discharge section 22;

[0072] The flexible connecting channel 23 is connected at the top to the discharge end of the main floating box 21 and at the bottom to the inlet end of the fixed discharge section 22;

[0073] Specifically, the arched rod assembly 6 includes:

[0074] The first arched rod 61 is fixedly installed at both ends on the vertically bent sections 112 on both sides of the outer ring hollow tube 11.

[0075] At the top, the middle section of the first arched rod 61 is movably disposed at the upper part of the main floating box 21 through a high position;

[0076] The second arched rod 62 is fixedly installed at both ends on the top of the vertically bent sections 112 on both sides of the outer ring hollow tube 11, and the middle section of the second arched rod 62 is movably disposed at the lower part of the main floating box 21 through the lower position.

[0077] The second arched rod 62 is installed at a lower height in the vertical direction than the first arched rod 61, so that the first arched rod 61 and the second arched rod 62 form a staggered through support structure on the main floating box 21, so as to stably support the main floating box 21 and allow it to slide along the first arched rod 61 and the second arched rod 62.

[0078] Specifically, the main floating box 21 is movably mounted on the first arched rod 61 and the second arched rod 62 via a micro-floating assembly 7, the micro-floating assembly 7 comprising:

[0079] The movable sleeve 71 is embedded in the side wall of the main floating box 21. The movable sleeve 71 is movably sleeved on the first arched rod 61 and the second arched rod 62. The two ends of the movable sleeve 71 are bolted with outer cover 72.

[0080] The floating limiting plate 73 is embedded in the first arched rod 61 and the second arched rod 62, and is located in the corresponding movable sleeve 71;

[0081] Floating springs 74 are arranged in a mirror image symmetrically on both sides of the floating limiting plate 73, and the ends of the floating springs 74 abut against the inner wall of the corresponding outer cover 72;

[0082] Specifically, the anti-bridging component 3 includes:

[0083] The main support rod 31 has fixed sleeves 32 at both ends. The fixed sleeves 32 are fixedly sleeved on the first arched rod 61 and the second arched rod 62 respectively. The main support rod 31 is set in an inclined position inside the main floating box 21. The two sides of the main support rod 31 are respectively close to the front and rear inner walls of the main floating box 21, and a gap is maintained between the main support rod 31 and the inner wall of the main floating box 21 so as not to interfere with the floating range of the main floating box 21.

[0084] A high-elasticity polyurethane forked rod 33 is fixedly installed on the side wall of the main rod 31 of the anti-frame structure and is spirally distributed along the axial direction of the main rod 31 of the anti-frame structure. The cross-section of the high-elasticity polyurethane forked rod 33 is designed to be thick at the root and thin at the end, and the end is equipped with a small ball head or a flat shovel.

[0085] Specifically, the fixed discharge section 22 includes:

[0086] The fixed base 221 is fixedly installed between the outer ring hollow tubes 11 by the fixed support rod 222, and the fertilizer output regulator 4 is set inside the fixed base 221;

[0087] The detachable discharge end 223 is detachably connected to the lower end of the fixed base 221. The detachable discharge end 223 is configured as a smooth funnel-shaped discharge end, an electric impeller-type discharge end, or a wide groove-type discharge end.

[0088] Specifically, the fertilizer output regulator 4 includes:

[0089] A transverse insert plate 41 is disposed through the fixed base 221. One end of the transverse insert plate 41 extends to the inner wall of the fixed base 221, and the other end is fixedly installed with an outer edge section 411.

[0090] An electric telescopic cylinder 42 is fixedly installed on the outer side wall of the fixed base 221, and the output end of the electric telescopic cylinder 42 is fixedly installed on the side wall of the transverse insert plate 41.

[0091] Specifically, the application component 5 includes:

[0092] The base 51 is fixedly installed between the outer ring hollow tubes 11 by the side support rods 54;

[0093] Centrifugal spraying disc 52 is movably mounted on the upper end of the base 51 via a rotating shaft;

[0094] A servo motor 53 is fixedly installed at the lower end of the base 51, and the output end of the servo motor 53 is fixedly connected to the rotating shaft.

[0095] Specifically, the application component 5 also includes:

[0096] The fertilizer splash guard 55 consists of an arc-shaped shielding part 551 and a movable adjustment part 552. The arc-shaped shielding part 551 is fixedly installed on the upper end of the base 51. The movable adjustment part 552 is symmetrically arranged on both sides of the arc-shaped shielding part 551. An adjustable opening 553 is formed between the two movable adjustment parts 552. The adjustable opening 553 is arranged facing the application outlet of the fixed frame 1.

[0097] The specific workflow of this invention is as follows:

[0098] Step 1: Installation and Preparation

[0099] This device is a small solid fertilizer application unit, primarily designed for complex terrains such as hillsides and small farmlands where large machinery cannot access. It is characterized by its flexibility and ease of use. It can be quickly installed on an electric tricycle or small handcart, saving time and effort in assembly and disassembly.

[0100] The specific installation steps are as follows:

[0101] Connect the detachable connection interface at the rear end of the mounting bracket 1 to the frame of the electric tricycle or small hand trailer, and use the U-shaped slot 121 at the top of the vertical mounting tube 12 and the quick locking device to initially fix the device to the towing vehicle.

[0102] To further improve the stability of the mounting bracket 1, after the U-shaped slot 121 is in place, the mounting bracket 1 and the vehicle frame can be reinforced by additional bolts to prevent loosening due to vibration during operation.

[0103] Power is supplied to the servo motor 53 of the spreading assembly 5 and the electric telescopic cylinder 42 of the fertilizer output regulator 4 (usually taken from the battery of the tractor vehicle).

[0104] Step 2: Loading

[0105] Open the sealing cover 212 on the top of the main floating tank 21, and load the solid fertilizer into the storage chamber of the main floating tank 21 through the conical feed hopper 211.

[0106] Close the sealing cap 212 to prevent fertilizer from splashing or getting damp during operation.

[0107] Step 3: Field operations

[0108] As the towing vehicle travels at a certain speed, the device automatically completes the following sub-steps:

[0109] 3.1: Automatic anti-blocking

[0110] The anti-blocking mechanism of this device relies on the staggered arrangement of the arched rod group 6, the elastic support of the micro-floating component 7, and the three-dimensional disturbance of the anti-bridging component 3. The three work together to achieve passive automatic arch breaking. Unlike conventional understanding, the floating direction of the main floating box 21 in this device is left and right (lateral), driven by the horizontal vibration generated by the uneven road surface, tire bumps, or lateral swing when the traction vehicle is moving.

[0111] (1) The height misalignment relationship and function of the first arched rod 61 and the second arched rod 62

[0112] The arched rod assembly 6 includes a first arched rod 61 and a second arched rod 62.

[0113] The two ends of the first arched rod 61 are fixedly installed on the top of the vertical bending section on both sides of the outer ring hollow tube 11, and the middle section is a horizontal section that is movably installed in the upper part of the main floating box 21 from a high position.

[0114] The two ends of the second arched rod 62 are also fixedly installed on the top of the vertical bending section on both sides of the outer ring hollow tube 11. The middle section is also a horizontal section, but it is movably installed at the bottom of the main floating box 21 from a low position.

[0115] The second arched rod 62 is installed at a lower vertical height than the first arched rod 61, forming a horizontal double-rod support structure with staggered heights. The middle sections of both arched rods are horizontal and parallel to each other.

[0116] This height misalignment plays the following key roles:

[0117] Function 1: Provides guidance and stable support for left and right floating.

[0118] Two horizontal rods of different heights pass through the main floating box 21, allowing it to slide smoothly along the axial direction (i.e., left-right direction) of the two rods when subjected to left-right vibrations. Because the two rods are vertically offset, they provide two-point constraints on the main floating box 21, effectively preventing it from tilting forward or backward or rotating around the vertical axis during floating, thus ensuring smooth left-right floating and directional consistency.

[0119] Function 2: Forces the main support pole 31 to tilt, adapting to left and right floating.

[0120] The main support rod 31 is fixedly sleeved onto the first arched rod 61 and the second arched rod 62 via fixing sleeves 32 at both ends. Due to the height difference between the two arched rods, the main support rod 31 is naturally inclined (rather than horizontal) inside the main floating box 21. When the main floating box 21 floats left and right, the inclined main support rod 31 moves obliquely left and right relative to the box, allowing the high-elasticity polyurethane forked rods 33 on both sides to repeatedly cut across the fertilizer layer inside the box at different cutting angles, generating greater lateral shear force and disturbance depth, significantly improving the arch-breaking effect.

[0121] Function 3: To achieve elastic reset and buffering in conjunction with the micro-floating component 7.

[0122] The main floating housing 21 is movably mounted on two arched rods via micro-floating components 7. When the main floating housing 21 moves left or right due to vibration, the floating spring 74 inside the movable sleeve 71 is compressed between the floating limit plate 73 and the outer cover 72, generating an elastic restoring force. The staggered rods ensure that the force on the housing is more even when floating left and right, avoiding jamming due to force on one side.

[0123] (2) Functions of each component of the anti-bridging assembly 3

[0124] The anti-bridging assembly 3 consists of an anti-bridging main rod 31, a fixing sleeve 32, and a high-elasticity polyurethane forked rod 33. The functions of each component are as follows:

[0125] The main support rod 31 is fixedly sleeved onto the first arched rod 61 and the second arched rod 62 at both ends via fixing sleeves 32, thus forming a rigidly connected whole with the arched rod group 6. Due to the height difference between the two arched rods, the main support rod 31 is installed in an inclined position inside the main floating box 21.

[0126] The anti-bridging main rod 31 is positioned close to the left and right inner walls of the main floating tank 21 on both sides, maintaining a small gap (usually 5-10mm) between it and the inner walls. This is done so that when the main floating tank 21 floats left and right, the left and right sides of the anti-bridging main rod 31 can directly scrape against the inner walls, preventing fertilizer from adhering to the inner walls and forming bridging "fulcrums." Simultaneously, because the anti-bridging main rod 31 spans almost the entire width of the tank (left-right direction), its tilted posture allows it to cover most of the area inside the tank during left-right floating, expanding the anti-bridging range and avoiding dead zones. Maintaining a gap with the inner walls ensures that friction does not hinder the free floating of the main floating tank 21.

[0127] Fixed sleeves 32 are installed at both ends of the main support rod 31, respectively sleeved and fastened to the first arched rod 61 and the second arched rod 62. The function of the fixed sleeves 32 is to reliably lock the main support rod 31 onto the arched rod group 6, preventing it from rotating or axially shifting during use, thereby ensuring that the position of the high-elasticity polyurethane forked rod 33 relative to the main floating box 21 remains constant, and making the arch-breaking action continuously effective.

[0128] The high-elasticity polyurethane bifurcated rod 33 is fixedly installed on the side wall of the main rod 31 of the anti-frame (i.e., the side facing the inside of the box, not the side directly opposite the left and right inner walls), and is distributed in a spiral shape along the axial direction of the main rod 31 of the anti-frame. Its cross-section is designed to be thick at the root and thin at the end, with a small ball head or flat shovel at the end.

[0129] The main function of this component is to improve the arch-breaking effect, specifically manifested in:

[0130] Spiral distribution: The inclined main support rod 31 has a spiral arrangement of branch rods. When the main floating box 21 floats left and right, the branch rods cut into the fertilizer layer at different heights and angles in sequence, generating a disturbance similar to spiral stirring, causing the fertilizer to tumble locally in the box and destroying the arch bridge structure from multiple directions.

[0131] Thick at the base and thin at the tip: The thick base ensures the connection strength between the forked rod and the main rod 31 of the anti-arch structure, while the thin tip reduces the cutting resistance to the fertilizer. At the same time, the thin tip can be more easily inserted into the gaps of the clump fertilizer, improving the arch breaking efficiency.

[0132] Small ball head or flat shovel: The small ball head at the end can reduce damage to fertilizer particles while increasing the contact area; the flat shovel is more suitable for flaky or blocky organic fertilizers and can break up small clumps.

[0133] The highly elastic polyurethane material possesses excellent elasticity and wear resistance. When the forked rod comes into contact with fertilizer or the inner wall of the container, it undergoes elastic deformation and rebound, generating micro-vibrations that further enhance the arch-breaking effect; at the same time, it avoids scratches that the metal rod may cause to the inner wall of the container.

[0134] 3.2: Quantitative Fertilizer Dispensing

[0135] Fertilizer is collected by the inclined guide surface 213 at the bottom of the main floating tank 21 and enters the fixed seat 221 of the fixed discharge section 22 through the flexible connecting channel 23. The fertilizer discharge rate regulator 4, according to preset instructions, uses an electric telescopic cylinder 42 to push the horizontal insert plate 41 to adjust the opening of the discharge port, achieving quantitative fertilizer dispensing. Depending on the type of fertilizer, different types of detachable discharge ends 223 can be replaced (smooth funnel type for granular fertilizer, electric impeller type for powdered fertilizer, or wide trough type for organic fertilizer).

[0136] 3.3: Centrifugal Spread

[0137] The measured amount of fertilizer falls directly into the center of the rotating centrifugal spreading disc 52. A servo motor 53 drives the centrifugal spreading disc 52 to rotate at high speed, and the fertilizer is thrown out by centrifugal force. The arc-shaped shielding part 551 of the fertilizer splash guard 55 prevents fertilizer from splashing backward, and the movable adjustment part 552 can open and close symmetrically to adjust the width of the adjustable opening 553, thereby controlling the spreading width. The fertilizer is finally evenly spread onto the ground through the spreading outlet at the front end of the fixed frame 1.

[0138] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0139] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solid fertilizer application device, characterized in that, include: The fixing frame (1) has a hollow frame structure. The front end of the fixing frame (1) is provided with a spreading outlet, and the rear end of the fixing frame (1) is provided with an interface that can be detachably connected to the traction vehicle. The fertilizer storage box (2) is buoyantly mounted on the upper end of the fixed frame (1) by means of an arched rod assembly (6), and the bottom of the fertilizer storage box (2) is provided with a discharge port; The anti-bridging component (3) is fixedly installed on the arched rod group (6) and located inside the fertilizer storage box (2). When the fertilizer storage box (2) floats relative to the arched rod group (6), the anti-bridging component (3) moves relative to the inner wall of the fertilizer storage box (2) and the fertilizer inside, thereby destroying the arch bridge structure formed by the fertilizer. The fertilizer output regulator (4) is located at the discharge port at the bottom of the fertilizer storage box (2) and is used to quantitatively regulate the output. The spreading component (5) is fixedly installed inside the fixed frame (1) and located directly below the discharge port, and is used to spread the fertilizer falling from the discharge port outward through the spreading outlet; The fertilizer storage box (2) floats relative to the fixed frame (1) and the anti-bridging assembly (3) through the arched rod group (6), thereby realizing the passive relative movement between the anti-bridging assembly (3) and the fertilizer storage box (2). The fixing frame (1) includes an outer ring hollow tube (11), a vertical support tube (12), and a reinforcing rib (13). The outer ring hollow tube (11) is rectangular in shape. The outer ring hollow tube (11) consists of a central outer section (111) and a vertically bent section (112) perpendicular to the central outer section (111). The vertical support tube (12) is mirror-symmetrically arranged on both sides of the central outer section (111) of the outer ring hollow tube (11). The top of the vertical support tube (12) is provided with a U-shaped slot (121) that cooperates with the frame of a tractor or tricycle and a quick locking device. The reinforcing rib (13) is inclinedly arranged in the vertically bent section (112) and its ends are respectively fixedly connected to the upper and lower ends of the outer ring hollow tube (11). The fertilizer storage box (2) includes: The main floating tank (21) has a storage cavity inside, a conical feed hopper (211) on the top, and a sealing cover (212) is hinged to the top of the conical feed hopper (211), and an inclined guide surface (213) is provided at the bottom. A fixed discharge section (22) is fixedly installed in the center of the fixed frame (1), and the fertilizer output regulator (4) is installed inside the fixed discharge section (22); The flexible connecting channel (23) is connected at the top to the discharge end of the main floating box (21) and at the bottom to the feed end of the fixed discharge section (22); The arched rod assembly (6) includes: The first arched rod (61) is fixedly installed at both ends on the top of the vertical bending section (112) on both sides of the outer ring hollow tube (11), and the middle section of the first arched rod (61) is movably installed through the upper part of the main floating box (21) from a high position. The second arched rod (62) is fixedly installed at both ends on the top of the vertical bending section (112) on both sides of the outer ring hollow tube (11), and the middle section of the second arched rod (62) is movably installed through the lower part of the main floating box (21). The second arched rod (62) is installed at a lower height in the vertical direction than the first arched rod (61), so that the first arched rod (61) and the second arched rod (62) form a staggered through support structure on the main floating box (21) to stably support the main floating box (21) and allow it to slide along the first arched rod (61) and the second arched rod (62); The main floating box (21) is movably mounted on the first arched rod (61) and the second arched rod (62) via a micro-floating assembly (7), the micro-floating assembly (7) comprising: The movable sleeve (71) is embedded in the side wall of the main floating box (21). The movable sleeve (71) is movably sleeved on the first arched rod (61) and the second arched rod (62). The two ends of the movable sleeve (71) are bolted with outer cover (72). A floating limiting plate (73) is embedded in the first arched rod (61) and the second arched rod (62) and is located in the corresponding movable sleeve (71); A floating spring (74) is mirror-symmetrically arranged on both sides of the floating limiting plate (73), and the end of the floating spring (74) abuts against the inner wall of the corresponding outer cover (72); The anti-bridging component (3) includes: The main anti-frame rod (31) has fixed sleeves (32) at both ends. The fixed sleeves (32) are fixedly sleeved on the first arched rod (61) and the second arched rod (62) respectively. The main anti-frame rod (31) is set in an inclined position inside the main floating box (21). The two sides of the main anti-frame rod (31) are respectively close to the front and rear inner walls of the main floating box (21) and maintain a gap with the inner wall of the main floating box (21) so as not to interfere with the floating range of the main floating box (21). A high-elasticity polyurethane fork rod (33) is fixedly installed on the side wall of the main support rod (31) and is spirally distributed along the axial direction of the main support rod (31). The cross-section of the high-elasticity polyurethane fork rod (33) is designed to be thick at the root and thin at the end, and the end has a small ball head or flat shovel.

2. The solid fertilizer application device according to claim 1, characterized in that: The fixed discharge section (22) includes: The fixed seat (221) is fixedly installed between the outer ring hollow tubes (11) by a fixed support rod (222), and the fertilizer output regulator (4) is set inside the fixed seat (221); The detachable discharge end (223) is detachably connected to the lower end of the fixed base (221). The detachable discharge end (223) is configured as a smooth funnel-shaped discharge end, an electric impeller-shaped discharge end, or a wide groove-shaped discharge end.

3. A solid fertilizer application device according to claim 2, characterized in that: The fertilizer output regulator (4) includes: A transverse insert (41) is disposed through the fixed base (221). One end of the transverse insert (41) extends to the inner wall of the fixed base (221), and the other end is fixedly installed with an outer edge section (411). An electric telescopic cylinder (42) is fixedly installed on the outer side wall of the fixed base (221), and the output end of the electric telescopic cylinder (42) is fixedly installed on the side wall of the transverse insert plate (41).

4. A solid fertilizer application device according to claim 3, characterized in that: The application component (5) includes: The base (51) is fixedly installed between the outer ring hollow tubes (11) by means of the side support rods (54); A centrifugal spraying disc (52) is movably mounted on the upper end of the base (51) via a rotating shaft; A servo motor (53) is fixedly installed at the lower end of the base (51), and the output end of the servo motor (53) is fixedly connected to the rotating shaft.

5. A solid fertilizer application device according to claim 4, characterized in that: The application component (5) also includes: The fertilizer splash guard (55) consists of an arc-shaped shielding part (551) and a movable adjustment part (552). The arc-shaped shielding part (551) is fixedly installed on the upper end of the base (51). The movable adjustment part (552) is symmetrically arranged on both sides of the arc-shaped shielding part (551). An adjustable opening (553) is formed between the two movable adjustment parts (552). The adjustable opening (553) is arranged facing the application outlet of the fixed frame (1).

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