A high ground clearance plant protection machine

Abstract

This invention relates to the field of plant protection machinery technology, and discloses a high-clearance plant protection machine, including a traveling mechanism and a collection unit installed at the front end of the traveling mechanism, which collects soil information in the direction of travel of the traveling mechanism and analyzes soil fertility; a fertilization unit installed at the rear end of the traveling mechanism, the fertilization unit including a crossbeam mounted at the rear end of the traveling mechanism via a mounting bracket, the crossbeam being equipped with a spray pipe, and the spray pipe being equipped with a nozzle; the fertilization unit also includes a mixing tank for mixing water and fertilizer, and the mixed aqueous solution is sprayed from the nozzle on the spray pipe. This invention achieves differentiated fertilization by adjusting the fertilizer ratio within the corresponding fertilization interval based on soil information data collected from the collection points, breaking the deadlock of one-size-fits-all fertilization and improving fertilizer utilization.

Description

Technical Field

[0001] This invention relates to the field of plant protection machinery technology, specifically a high ground clearance plant protection machine. Background Art

[0002] High-clearance plant protection machinery is an agricultural machine specifically designed for mid-to-late stage plant protection operations. It has a high ground clearance, which can effectively avoid crushing and damaging crops, while improving operational efficiency and safety. Specifically, it is used for crop planting, sowing, and fertilization.

[0003] Currently, existing high-clearance plant protection machinery can be used for fertilization through deep tillage, ground application, and spraying.

[0004] For example, Chinese patent CN221615550U discloses a plant protection machine that increases fertilizer loading capacity. This plant protection machine can expand the space for loading fertilizer in the storage box, thereby increasing the fertilizer loading capacity of the storage box and thus improving the plant protection efficiency for crops.

[0005] For example, Chinese patent CN221615557U discloses an easily modifiable plant protection machine that can perform fertilization and pesticide spraying on crops separately during the crop protection process, reducing the need to use different machinery for fertilization and pesticide spraying, which leads to low plant protection efficiency.

[0006] The aforementioned plant protection machines have all improved fertilization efficiency. However, the reality of traditional agriculture in the field is that, according to survey data, soil fertility can vary by up to 300% within the same plot. A uniform amount of fertilizer application not only leads to fertilizer waste in some areas but also causes fertilizer deficiency in others, resulting in low fertilizer utilization and ultimately uneven crop yields across different plots. Summary of the Invention

[0007] The purpose of this invention is to provide a high ground clearance plant protection machine to solve at least one technical problem existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high ground clearance plant protection machine, including a traveling mechanism, and further comprising:

[0009] A data acquisition unit installed at the front end of a traveling machine, which can collect soil information in the direction of travel of the traveling machine and analyze soil fertility.

[0010] A fertilizer application unit installed at the rear end of a traveling machine, the fertilizer application unit including a cross frame installed at the rear end of the traveling machine via a mounting bracket, the cross frame being provided with a spray pipe and a nozzle being installed on the spray pipe;

[0011] The fertilization unit also includes a mixing tank for mixing water and fertilizer, and the mixed aqueous solution is sprayed out from the nozzle on the spraying pipeline.

[0012] The collection unit adjusts the ratio of water and fertilizer in the mixing tank according to the soil fertility distribution.

[0013] Optionally, two storage tanks for holding water and liquid fertilizer are installed at the end of the traveling machinery, and the mixing tank is located above the storage tanks. Both storage tanks and the mixing tank are connected by inlet pipes, and each inlet pipe is equipped with a separate solenoid valve. The mixing tank is connected to the spraying pipeline by a delivery pipe, and the delivery pipe is equipped with a main solenoid valve.

[0014] Optionally, the data collection unit includes a fixed box fixed to the front end of the traveling machinery. The fixed box has a vertically oriented through hole at its center, and a lifting rod and a lowering rod are slidably installed in the through hole. The top end of the lowering rod is a hollow tube with a long groove on its outer wall. One end of the lifting rod is inserted into the hollow tube, and a sliding pin is fixed to the outer wall of the end of the lifting rod located in the hollow tube. The sliding pin is slidably installed in the long groove. A soil sensor is installed at the bottom end of the lowering rod, and the probe of the soil sensor is vertically downward. The top end of the lifting rod is connected to the telescopic end of a hydraulic cylinder installed on the top of the traveling machinery.

[0015] Optionally, a sliding plate is slidably installed on the outer wall of the lower rod located below the fixed box. Fixing pins are fixed on both sides of the bottom of the sliding plate, and the bottom tip of the fixing pin is lower than the probe tip of the soil sensor. The outer wall of the lower rod is also provided with a locking protrusion, and the through hole on the sliding plate is provided with a locking groove that can be locked in.

[0016] Optionally, the two side walls of the fixed box are provided with side grooves, and a swing arm is rotatably installed in each of the two side grooves. The rotation point of the swing arm and the side groove is provided with an incomplete gear. The outer wall of the lifting rod is provided with a tooth groove that can mesh with the incomplete gear. A rotatable cleaning brush is installed at the end of the swing arm. When the two swing arms rotate close to each other, the cleaning brush can contact the probe on the soil sensor.

[0017] Optionally, the outer wall of the swing arm is rotatably equipped with a friction wheel and a transmission wheel that drive each other through friction. The transmission wheel is connected to the cleaning brush through a transmission belt, and when the two swing arms rotate close to each other, the friction wheel can contact the outer wall of the lifting rod.

[0018] Optionally, the diameter of the friction wheel is larger than the diameter of the transmission wheel.

[0019] Optionally, the thickness of the friction wheel is greater than the thickness of the incomplete gear, and the arc-shaped edge of the friction wheel is provided as an elastic layer.

[0020] Optionally, the line connecting the corresponding positions of the two long slots is designed to be perpendicular to the traveling direction of the traveling machine, and the two fixing pins on the slide plate are designed to be distributed along the traveling direction of the traveling machine.

[0021] Optionally, the mounting bracket is oscillating and adjustable via a drive unit on the traveling mechanism, and the mounting bracket can extend and retract along its length.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] I. This invention analyzes soil fertility after collecting soil information, and then adjusts the ratio of water and fertilizer in the mixing tank based on the analysis results, thereby regulating the fertilization ratio in different areas. This allows fertilization to be carried out within a fixed length range around the collection point, and the fertilizer ratio within the corresponding fertilization range can be adjusted based on the soil information data from the collection point, thus achieving differentiated fertilization, breaking the deadlock of one-size-fits-all fertilization, and improving fertilizer utilization.

[0024] Second, due to the stable support provided by the sliding plate and the fixing pin to the lower rod, when the lower rod moves downward, the long groove on it and the sliding pin of the lifting rod will disengage from the fixing box. After disengagement, the hydraulic cylinder will drive the lifting rod to move upward a certain distance so that the sliding pin is located in the middle of the long groove. The purpose is to provide a certain displacement space between the lifting rod and the lower rod. The tolerance between the sliding pin and the long groove can reduce the impact of vibration and offset on the soil sensor, thereby making the detection results more accurate. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the front end of the traveling machinery of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the rear end of the traveling mechanism of the present invention;

[0027] Figure 3 For the present invention Figure 2 Enlarged view of point A in the image;

[0028] Figure 4 This is the front view of the present invention;

[0029] Figure 5 For the present invention Figure 4 Cross-sectional perspective view and enlarged view of the middle edge BB;

[0030] Figure 6 For the present invention Figure 4A sectional view along the center CC;

[0031] Figure 7 This is a schematic diagram showing the state of the swing arm after rotation according to the present invention;

[0032] Figure 8 This is an exploded perspective view of the lifting rod and the lowering rod of the present invention;

[0033] Figure 9 This is an enlarged perspective view of the swing arm and its structure of the present invention;

[0034] Figure 10 This is a simplified view of the fertilization area and information collection points of this invention.

[0035] In the diagram: 1. Traveling machinery; 2. Collection unit; 3. Fertilization unit; 4. Mounting bracket; 5. Horizontal frame; 6. Spraying pipeline; 7. Storage tank; 8. Inlet pipe; 9. Individual solenoid valve; 10. Main solenoid valve; 11. Mixing tank; 12. Fixing box; 13. Lifting rod; 14. Swing arm; 15. Incomplete gear; 16. Friction wheel; 17. Transmission wheel; 18. Lowering rod; 19. Long groove; 20. Sliding pin; 21. Soil sensor; 22. Slide plate; 23. Fixing pin; 24. Cleaning brush; 25. Clip protrusion. Detailed Implementation

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Please see Figures 1 to 10 The present invention provides a technical solution: a high ground clearance plant protection machine, including a traveling mechanism 1, and further comprising:

[0038] The acquisition unit 2 is installed at the front end of the traveling machinery 1, and the acquisition unit 2 can collect soil information in the direction of travel of the traveling machinery 1 and analyze soil fertility.

[0039] The fertilizer application unit 3 is installed at the rear end of the traveling machinery 1. The fertilizer application unit 3 includes a cross frame 5 installed at the rear end of the traveling machinery 1 via a mounting bracket 4. The cross frame 5 is provided with a spray pipe 6, and a nozzle is installed on the spray pipe 6.

[0040] The fertilizer application unit 3 also includes a mixing tank 11 that can mix water and fertilizer, and the mixed aqueous solution is sprayed out from the nozzle on the spray pipe 6.

[0041] The collection unit 2 adjusts the ratio of water and fertilizer in the mixing tank 11 according to the soil fertility distribution.

[0042] Research data shows that soil fertility can vary by up to 300% within the same plot of land. Applying the same amount of fertilizer not only leads to fertilizer waste in some areas but also causes fertilizer deficiency in others, resulting in low fertilizer utilization and ultimately uneven crop yields across different areas. Therefore, it is essential to break the deadlock of applying fertilizer in a uniform manner.

[0043] In this case, when the high ground clearance plant protection machinery is in use, the traveling machinery 1 mixes water and fertilizer through the mixing tank 11 of the fertilizer section 3 during the travel process, and the mixed liquid is sprayed out from the nozzle on the spray pipe 6 to apply fertilizer.

[0044] At the same time, the data collection unit 2 also collects soil information in the direction of travel. Specifically, it can use a near-infrared spectrometer for non-contact scanning to detect the organic matter content of the soil and analyze the soil fertility. Alternatively, it can use a microwave humidity sensor, which is integrated into the chassis of the traveling machinery 1, to detect the surface humidity and water content of the soil and infer the soil fertility.

[0045] After collecting soil information, soil fertility is analyzed. Based on the analysis results, the ratio of water to fertilizer in mixing tank 11 is adjusted, thereby regulating the fertilization ratio in different areas. For details, please refer to [link / reference needed]. Figure 10 Where L, L1, L2... represent fertilization intervals, and a1, a2, a3... represent collection points. This allows for fertilization within a fixed length range around the collection point, and the fertilizer ratio within the corresponding fertilization interval can be adjusted based on soil information data from the collection point, thereby achieving differentiated fertilization, breaking the deadlock of one-size-fits-all fertilization, and improving fertilizer utilization.

[0046] In one preferred embodiment, an implementation method for mixing the liquid and an implementation method for controlling the ratio of water to fertilizer are provided;

[0047] At the end of the traveling machinery 1, two liquid storage tanks 7 are installed, one for holding water and the other for holding liquid fertilizer. A mixing tank 11 is located above the liquid storage tanks 7. The two liquid storage tanks 7 and the mixing tank 11 are connected by inlet pipes 8. Each inlet pipe 8 is equipped with a separate solenoid valve 9. The mixing tank 11 is connected to the spray pipe 6 through a delivery pipe, and a main solenoid valve 10 is installed on the delivery pipe.

[0048] For details, please refer to [link / reference]. Figure 2 and Figure 3During mixing, water and liquid fertilizer in storage tank 7 are introduced into mixing tank 11 through inlet pipe 8 for mixing. Specifically, a micro water pump or similar means can be used for transportation. After mixing in mixing tank 11, the mixture is transported to spray pipeline 6 through delivery pipe and sprayed out through nozzle for fertilization. The transportation can also be carried out using a micro water pump.

[0049] Within the aforementioned fertilization zone, the total amount of liquid entering the storage tank 7 through the inlet pipe 8 is constant. Thus, the mixing and dilution ratio of water and liquid fertilizer can be controlled by adjusting the solenoid valves 9 on the two inlet pipes 8, thereby achieving the effect of adjusting the fertilization ratio.

[0050] After mixing, the main solenoid valve 10 is opened, allowing the mixed solution to be transported through the infusion pipe to the spraying pipeline 6 to complete the subsequent spraying and fertilization process.

[0051] In one preferred embodiment, an implementation method for collecting soil information is provided;

[0052] The data collection unit 2 includes a fixed box 12 fixed to the front end of the traveling machinery 1. The fixed box 12 has a vertically arranged through hole in the center, and a lifting rod 13 and a lowering rod 18 are slidably installed in the through hole. The top end of the lowering rod 18 is a hollow tube, and the outer wall of the hollow tube has a long groove 19. One end of the lifting rod is inserted into the hollow tube, and a sliding pin is fixed on the outer wall of the end of the lifting rod located in the hollow tube. The sliding pin is slidably installed in the long groove. A soil sensor 21 is installed at the bottom end of the lowering rod 18, and the probe of the soil sensor 21 is set vertically downward. The top end of the lifting rod 13 is connected to the telescopic end of the hydraulic cylinder installed on the top of the traveling machinery 1.

[0053] For details, please refer to [link / reference]. Figure 5 and Figure 6 In this embodiment, an electrochemical sensor detection method is provided, which uses a contact method for detection. This can further improve the detection accuracy and reduce the error in fertilization between different areas. The specific method is as follows:

[0054] During the movement of the traveling machinery 1, the main solenoid valve 10 is in the open state, which is the fertilization process. When the traveling machinery 1 moves to... Figure 10When the fertilization stops at point a, the main solenoid valve 10 also closes to stop fertilization. At this time, the telescopic end of the hydraulic cylinder at the top of the traveling machine 1 extends downward, thereby driving the lifting rod 13, the lowering rod 18, and the soil sensor 21 to move downward until the probe of the soil sensor 21 is vertically inserted into the soil, thereby detecting the components in the soil. For example, the soil sensor 21 can be a temperature and humidity sensor to monitor the temperature and humidity in the soil, or a soil pH sensor to detect the acidity and alkalinity of the soil, or a soil conductivity sensor to detect the salt content in the soil, and thus the concentration of nitrogen and potassium ions can be inferred. In summary, soil fertility can be estimated through the above methods. Moreover, this contact detection method is more accurate and can be used in combination with the above non-contact detection methods. By reasonably selecting the combination of detection parameters and technologies, multiple key indicators can be comprehensively analyzed to analyze the soil fertility of the area, thereby more accurately controlling the fertilization ratio and improving fertilization efficiency.

[0055] Moreover, it is worth noting that in this embodiment, when the lifting rod 13 moves down, it will push the bottom of the long groove 19 through the sliding pin 20 to drive the lower rod 18 to move down. Furthermore, neither the long groove 19 nor the sliding pin 20 disengages from the through hole in the fixed box 12 during the downward movement of the lower rod 18. Therefore, the lifting rod 13 and the lower rod 18 can be regarded as a complete coaxial rod to ensure that the probe of the soil sensor 21 can be vertically inserted into the soil, thereby improving the accuracy of the detection results.

[0056] During this detection process, the soil can be loosened in advance, which not only facilitates the insertion of the soil sensor 21 probe, but also makes it easier for the mixed solution to penetrate the soil during fertilization.

[0057] In one preferred embodiment, an implementation is provided that can further improve the stability of the soil sensor 21 when inserted into the soil;

[0058] A sliding plate 22 is slidably installed on the outer wall of the lower rod 18 located below the fixed box 12. Fixing pins 23 are fixed on both sides of the bottom of the sliding plate 22, and the bottom tip of the fixing pin 23 is lower than the probe tip of the soil sensor 21. The outer wall of the lower rod 18 is also provided with a locking protrusion 25, and the through hole on the sliding plate 22 is provided with a locking groove that can be locked in.

[0059] For details, please refer to [link / reference]. Figure 8When the lowering rod 18 moves downward, due to the interlocking action between the locking protrusion 25 and the locking groove inside the sliding plate 22, the sliding plate 22 will move downward along with it, and the fixing pin 23 will be inserted into the soil before the soil sensor 21. When the resistance of the soil is greater than the interlocking force between the locking protrusion 25 and the locking groove, the lowering rod 18 will drive the soil sensor 21 to move downward. In this way, the prior fixing of the sliding plate 22 by the fixing pin 23 can provide a relatively stable constraint for the downward movement of the lowering rod 18, so that the probe of the soil sensor 21 can be inserted vertically into the soil, improving its stability and preventing the probe of the soil sensor 21 from bending due to deviation and affecting the detection results.

[0060] Moreover, in this embodiment, due to the stable support provided by the sliding plate 22 and the fixing pin 23 to the lower rod 18, when the lower rod 18 moves down, the long groove 19 on it and the sliding pin 20 of the lifting rod 13 will disengage from the fixing box 12. After disengagement, the hydraulic cylinder will drive the lifting rod 13 to move upward a certain distance so that the sliding pin 20 is located in the middle of the long groove 19. The purpose is to provide a certain displacement space between the lifting rod 13 and the lower rod 18. Because after the probe of the soil sensor 21 is inserted into the soil, the fixing box 12 may transmit the vibration of the traveling machinery 1 to the soil sensor 21 through the lower rod 18, thereby affecting its detection results. At the same time, there may also be displacement deviation in the direction of travel.

[0061] Therefore, after the soil sensor 21 is inserted into the soil, the tolerance between the sliding pin 20 and the long groove 19 can reduce the impact of vibration and offset on the soil sensor 21, thereby making the detection results more accurate.

[0062] Furthermore, damping cotton can be added to the outer wall of the sliding pin 20 or the inner wall of the long groove 19 to further eliminate the impact of vibration on the soil sensor 21.

[0063] In one preferred embodiment, a method for cleaning the probe is provided to improve the accuracy of multiple test results and avoid excessive mutual interference.

[0064] The fixed box 12 has side grooves on both sides, and swing arms 14 are rotatably installed in both side grooves. The rotation point of the swing arms 14 and the side groove is provided with an incomplete gear 15. The outer wall of the lifting rod 13 has a tooth groove that can mesh with the incomplete gear 15. The end of the swing arm 14 is equipped with a rotatable cleaning brush 24. When the two swing arms 14 approach each other and rotate, the cleaning brush 24 can contact the probe on the soil sensor 21.

[0065] See Figure 6 and Figure 7As the lifting rod 13 moves downward, its toothed grooves drive the incomplete gear 15 to rotate, thereby causing the two swing arms 14 to rotate to both sides. Figure 7 As shown, this position allows the cleaning brush 24 to be kept away from the ground, preventing it from sticking too much to the soil. Also, when the toothed groove moves below the incomplete gear 15, the lifting rod 13 can keep the swing arm 14 in the open position through the incomplete gear.

[0066] Conversely, when the lifting rod 13 moves upward, the swing arms 14 will move closer to each other and rotate, and the cleaning brush 24 will come into contact with the probe. Then, driven by the external structure, the cleaning brush 24 rotates to clean the soil adhering to the probe surface, preparing for subsequent testing and reducing the impact on subsequent test results.

[0067] In one preferred embodiment, an implementation that can control the rotation of the cleaning brush 24 is provided;

[0068] The outer wall of the swing arm 14 is rotatably equipped with a friction wheel 16 and a transmission wheel 17 that drive each other through friction. The transmission wheel 17 is connected to the cleaning brush 24 through a transmission belt. When the two swing arms 14 rotate close to each other, the friction wheel 16 can contact the outer wall of the lifting rod 13.

[0069] The diameter of the friction wheel 16 is larger than the diameter of the transmission wheel 17.

[0070] For details, please refer to [link / reference]. Figure 6 and Figure 9 As can be seen from the above, when the lifting rod 13 moves upward, the swing arms 14 will move closer to each other and rotate. At the same time, the friction wheel 16 will contact the outer wall of the lifting rod 13. Then, as the lifting rod 13 continues to move upward, the friction wheel 16 will rotate and drive the transmission wheel 17 to rotate, which in turn drives the cleaning brush 24 to rotate and clean through the transmission belt.

[0071] The design of the friction wheel 16 and the transmission wheel 17 can not only increase the transmission ratio, but also change the rotation direction of the cleaning brush 24, so that it can clean the probe from top to bottom, further improving the cleaning effect.

[0072] In one preferred embodiment, the thickness of the friction wheel 16 is greater than the thickness of the incomplete gear 15, and the arc-shaped edge of the friction wheel 16 is provided as an elastic layer. The elastic layer design of the friction wheel 16 can further improve the friction between it and the lifting rod 13, so as to ensure the cleaning effect of the cleaning brush 24.

[0073] In one preferred embodiment, the line connecting the corresponding positions of the two long slots 19 is designed to be perpendicular to the traveling direction of the traveling mechanism 1, and the two fixing pins 23 on the slide plate 22 are designed to be distributed along the traveling direction of the traveling mechanism 1.

[0074] See Figure 1 The stability of the skateboard 22 can be further improved by the distribution design of the fixing pins 23.

[0075] In one preferred embodiment, the mounting bracket 4 is oscillating and adjustable via a drive unit on the traveling mechanism 1, and the mounting bracket 4 can extend and retract along its length.

[0076] The angle of the mounting bracket 4 can be adjusted using a motor or cylinder, thereby adjusting the height of the fertilizer spraying. Furthermore, the telescopic adjustment of the mounting bracket 4 can further increase the spraying range. Figure 10 The length of the fertilization interval shown in L.

[0077] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high ground clearance plant protection machine, comprising a traveling mechanism (1), characterized in that, Also includes: A data collection unit (2) is installed at the front end of the traveling machinery (1), and the data collection unit (2) can collect soil information in the direction of travel of the traveling machinery (1) and analyze soil fertility; A fertilizer application unit (3) is installed at the rear end of the traveling machinery (1). The fertilizer application unit (3) includes a cross frame (5) installed at the rear end of the traveling machinery (1) via a mounting bracket (4). The cross frame (5) is provided with a spray pipe (6), and a nozzle is installed on the spray pipe (6). The fertilizer application unit (3) also includes a mixing tank (11) for mixing water and fertilizer, and the mixed aqueous solution is sprayed out from the nozzle on the spray pipe (6); The collection unit (2) adjusts the ratio of water and fertilizer in the mixing tank (11) according to the soil fertility distribution; At the end of the traveling machinery (1), two liquid storage tanks (7) are installed for holding water and liquid fertilizer respectively. The mixing tank (11) is located above the liquid storage tank (7). The two liquid storage tanks (7) and the mixing tank (11) are connected by inlet pipes (8). Each of the two inlet pipes (8) is equipped with a separate solenoid valve (9). The mixing tank (11) is connected to the spray pipe (6) through a delivery pipe. The delivery pipe is equipped with a main solenoid valve (10). The collection unit (2) includes a fixed box (12) fixed at the front end of the traveling machinery (1). The fixed box (12) has a vertically arranged through hole in the center, and a lifting rod (13) and a lowering rod (18) are slidably installed in the through hole. The top end of the lowering rod (18) is a section of empty tube, and the outer wall of the empty tube has a long groove (19). One end of the lifting rod (13) is inserted into the empty tube, and a sliding pin (20) is fixed on the outer wall of the end of the lifting rod (13) located in the empty tube. The sliding pin (20) is slidably installed in the long groove (19). A soil sensor (21) is installed at the bottom end of the lowering rod (18), and the probe of the soil sensor (21) is set vertically downward. The top end of the lifting rod (13) is connected to the telescopic end of the hydraulic cylinder installed on the top of the traveling machinery (1). A sliding plate (22) is slidably installed on the outer wall of the lower rod (18) located below the fixed box (12). Fixing pins (23) are fixed on both sides of the bottom of the sliding plate (22), and the bottom tip of the fixing pin (23) is lower than the probe tip of the soil sensor (21). The outer wall of the lower rod (18) is also provided with a locking protrusion (25), and the through hole on the sliding plate (22) is provided with a locking groove that can be locked in. The fixed box (12) has side grooves on both sides, and swing arms (14) are rotatably installed in both side grooves. The swing arms (14) and the side grooves are connected by an incomplete gear (15). The outer wall of the lifting rod (13) is provided with a tooth groove that can mesh with the incomplete gear (15). The end of the swing arm (14) is equipped with a rotatable cleaning brush (24). When the two swing arms (14) rotate close to each other, the cleaning brush (24) can contact the probe on the soil sensor (21).

2. The high ground clearance plant protection machinery according to claim 1, characterized in that: The outer wall of the swing arm (14) is rotatably equipped with a friction wheel (16) and a transmission wheel (17) that drive each other through friction. The transmission wheel (17) is connected to the cleaning brush (24) through a transmission belt. When the two swing arms (14) rotate close to each other, the friction wheel (16) can contact the outer wall of the lifting rod (13).

3. The high ground clearance plant protection machinery according to claim 2, characterized in that: The diameter of the friction wheel (16) is larger than the diameter of the transmission wheel (17).

4. The high ground clearance plant protection machinery according to claim 2, characterized in that: The thickness of the friction wheel (16) is greater than the thickness of the incomplete gear (15), and the arc-shaped edge of the friction wheel (16) is provided as an elastic layer.

5. The high ground clearance plant protection machinery according to claim 2, characterized in that: The line connecting the corresponding positions of the two long slots (19) is designed to be perpendicular to the travel direction of the traveling machine (1), and the two fixing pins (23) on the slide plate (22) are designed to be distributed along the travel direction of the traveling machine (1).

6. The high ground clearance plant protection machinery according to any one of claims 1-5, characterized in that: The mounting bracket (4) is controlled to swing and adjust by the drive unit on the traveling mechanism (1), and the mounting bracket (4) can be extended and retracted along the length direction.

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