A weeding device for agricultural use with a height of weeding easily adjustable

Abstract

The present application relates to the technical field of weeding, and discloses a weeding device convenient for adjusting weeding height for agriculture, which comprises a vehicle body, a connecting rod is fixed to the tail of the vehicle body, a support frame is fixed to the end of the connecting rod, a hydraulic oil tank is fixed to the end of the support frame, a connecting pipeline is fixed to the outer surface of the hydraulic oil tank, an adjusting box is fixed to the end of the connecting pipeline, a fixing rod is elastically connected to the bottom of the adjusting box, a positioning rod is fixed to the end of the fixing rod, and a plurality of groups of flame sprayers are installed on the positioning rod; when the weeding device is used for flame weeding, the second walking wheel moves up and down when passing through a slope, drives the first piston plate to move, makes the hydraulic oil reciprocate in the first containing groove and the second containing groove, drives the second piston plate to move, and makes the second piston plate drive the flame sprayers to move, so that the height of the flame sprayers is conveniently adjusted.

Description

Technical Field

[0001] This invention relates to the field of weeding technology, specifically to an agricultural weeding device that allows for easy adjustment of the weeding height. Background Technology

[0002] A flame weed killer is a device that uses high-temperature flames to bake the surface of a field, causing weeds to lose water and die. Flame weed killers are generally powered by oil, electricity, or manual operation, allowing them to move across the field. They typically use gas delivery pipes to supply gas to several flamethrowers to remove weeds.

[0003] When a flame weeder removes weeds using flames, the outer flame has a higher temperature than the inner flame, so the outer flame is used to bake the weeds. However, during the operation of the flame weeder, the flame spray height needs to be adjusted to a suitable position. Because there are different ground levels in the field, and the height of the flamer is not easy to adjust during operation, the flame height may be unsuitable when the flame weeder passes over these areas. This can prevent the outer flame from fully utilizing its temperature for weed removal, thus reducing the weeding effect. Summary of the Invention

[0004] This invention provides an agricultural weeding device with easily adjustable weeding height. The device utilizes a second traveling wheel to move up and down over surfaces of varying heights. This movement of the second traveling wheel moves a first piston plate, causing hydraulic oil to reciprocate within a first and second receiving groove. The movement of the hydraulic oil, in turn, moves the second piston plate, which in turn moves the flamethrower, thus adjusting the height of the flamethrower. This solves the problem mentioned in the background art where adjusting the flamethrower height during movement is inconvenient, leading to unsuitable flame heights when the flame weeder traverses surfaces of varying heights. This results in insufficient utilization of the outer flame's temperature for weeding, reducing the weeding effect.

[0005] The present invention provides the following technical solution: an agricultural weeding device with adjustable weeding height, comprising a vehicle body, a connecting rod fixed to the rear of the vehicle body, a support frame fixed to the end of the connecting rod, a first traveling wheel rotatably mounted on the bottom of the support frame, a hydraulic oil tank fixed to the end of the support frame, a connecting pipe fixed to the outer surface of the hydraulic oil tank, an adjusting box fixed to the end of the connecting pipe, a fixing rod elastically connected to the bottom of the adjusting box, a positioning rod fixed to the end of the fixing rod, a plurality of flamethrowers mounted on the positioning rod, and an air storage tank for supplying air to the flamethrowers mounted on the support frame;

[0006] The bottom of the hydraulic oil tank is elastically connected to an installation frame, and a second traveling wheel is rotatably mounted on the installation frame. The interior of the hydraulic oil tank is provided with a first receiving groove for filling hydraulic oil, and the interior of the regulating box is provided with a second receiving groove for filling hydraulic oil. An oil delivery groove is opened in the connecting pipe, and the two ends of the oil delivery groove are respectively connected to the first receiving groove and the second receiving groove.

[0007] As an optional embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, the bottom of the hydraulic oil tank is provided with a partition, and a receiving groove for the mounting frame to slide into is provided below the partition. A first piston plate is slidably disposed in the first receiving groove, and a support column is fixed between the first piston plate and the mounting frame. The support column passes through the partition and is slidably connected to the partition. A first spring is fixed between the first piston plate and the partition.

[0008] As an alternative embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, a second piston plate is slidably disposed in the second receiving groove, the end of the fixing rod is fixedly connected to the second piston plate, and a second spring is fixed between the upper surface of the second piston plate and the top of the adjusting box.

[0009] As an optional embodiment of the agricultural weeding device of the present invention, which facilitates the adjustment of weeding height, a number of stabilizing columns are fixed between the outer surface of the hydraulic oil tank and the outer surface of the adjustment box.

[0010] As an alternative embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, a third piston plate is slidably disposed on the top of the first receiving groove, a third spring is fixed between the upper surface of the third piston plate and the top of the hydraulic oil tank, and a telescopic rod is fixed between the upper surface of the third piston plate and the top of the hydraulic oil tank.

[0011] As an optional embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, the telescopic rod includes an outer sleeve and an inner rod. The outer sleeve is fixed to the third piston plate, and the inner rod is fixed to the top of the hydraulic oil tank. A sliding groove is provided inside the outer sleeve, and the end of the inner rod is slidably disposed in the sliding groove. A fourth spring is fixed between the bottom of the sliding groove and the end of the inner rod.

[0012] As an optional embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, the connecting pipe has a rotating groove inside, and a sealing plate is rotatably disposed in the rotating groove. The sealing plate has a notch that communicates with the oil delivery groove, and the sealing plate changes the opening size of the oil delivery groove by rotating.

[0013] As an optional embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, the hydraulic oil tank is provided with a slide rail, a crossbar is slidably arranged in the slide rail, the end of the crossbar is fixed to the telescopic rod, the other end of the crossbar is welded with a toothed plate, the toothed plate is slidably connected to the connecting pipe, a rotating shaft is rotatably arranged in the rotating groove, the end of the rotating shaft is fixed with a gear that is drivenly connected to the toothed plate, a sleeve is fixed on the circumference of the rotating shaft, and the end of the sleeve is fixedly connected to the sealing plate.

[0014] As an alternative embodiment of the agricultural weeding device of the present invention, which facilitates adjustment of weeding height, the toothed plate includes a first engaging portion, a flat portion, and a second engaging portion.

[0015] As an alternative embodiment of the agricultural weeding device for easy adjustment of weeding height described in this invention, a torsion spring is sleeved on the circumference of the rotating shaft, and the two ends of the torsion spring are respectively fixed on the surface of the sleeve rod and the inner wall of the rotating groove.

[0016] The present invention has the following beneficial effects:

[0017] 1. In this agricultural weeding device with adjustable weeding height, when the vehicle moves in the field and encounters ground of different heights, the second traveling wheel can move up and down. The up and down movement of the second traveling wheel drives the first piston plate to move up and down in the first receiving groove. The up and down movement of the first piston plate allows hydraulic oil to flow through the oil channel between the first and second receiving grooves, thereby causing the second piston plate to move up and down in the second receiving groove. The up and down movement of the second piston plate can drive the flamethrower to move up and down, thus facilitating the adjustment of the flamethrower's height during travel and improving the weeding effect.

[0018] 2. In this agricultural weeding device that facilitates height adjustment, when adjusting the height of the flamethrower, the third piston plate moves up and down, causing the hydraulic oil inside the first receiving tank to flow. Simultaneously, the pressure inside the first receiving tank is balanced by the up-and-down movement of the third piston plate as the hydraulic oil flows through the oil delivery tank. This reduces the amount of hydraulic oil flowing through the oil delivery tank, thereby reducing the movement of the second piston plate. This prevents the first and second piston plates from moving synchronously to the same amplitude. Only after the first piston plate stops moving and the third piston plate resets, is hydraulic oil supplied again, allowing the second piston plate to continue moving until it reaches the same amplitude as the first piston plate. Therefore, when adjusting the flamethrower, a delayed height adjustment is possible. When the second traveling wheel passes over uneven ground, the flamethrower does not immediately move to the same amplitude as the second traveling wheel. Instead, the height adjustment is completed only when the flamethrower reaches the uneven ground, facilitating weeding on uneven surfaces.

[0019] 3. In this agricultural weeding device that facilitates height adjustment, during the delayed height adjustment of the flamethrower, the telescopic rod drives the horizontal bar to move, the horizontal bar drives the toothed plate to move, the toothed plate drives the gear to rotate, and the gear drives the sealing plate to rotate, causing the sealing plate to fully open the oil delivery channel. This facilitates the adjustment of the flow orifice of the oil delivery channel. By adjusting the flow orifice of the oil delivery channel, the flow speed of hydraulic oil between the first and second receiving channels is increased, thereby changing the speed of flamethrower height adjustment. When the flow orifice of the oil delivery channel is small, the flamethrower height adjustment is slower, achieving the purpose of delayed height adjustment. When the flow orifice of the oil delivery channel is large, the flamethrower height adjustment is faster, allowing the flamethrower to be quickly adjusted to the appropriate position, thus improving the rationality of delayed height adjustment and further enhancing the effect of flame weeding. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural cross-sectional view of the hydraulic oil tank and regulating box of the present invention.

[0022] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle.

[0023] Figure 4 For the present invention Figure 2 A cross-sectional view of the telescopic rod.

[0024] Figure 5 This is a cross-sectional view of the internal structure of the connecting pipe portion of the present invention.

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting pipe portion of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the internal structure of the connecting pipe of the present invention.

[0027] Figure 8 For the present invention Figure 7 Enlarged view of section B in the middle.

[0028] In the diagram: 1. Vehicle body; 2. Connecting rod; 3. Support frame; 4. First traveling wheel; 5. Hydraulic oil tank; 6. Connecting pipe; 7. Adjustment box; 8. Fixing rod; 9. Positioning rod; 10. Flamethrower; 11. Gas tank; 12. Mounting frame; 13. Second traveling wheel; 14. First receiving slot; 15. Second receiving slot; 16. Oil delivery tank; 17. Partition plate; 18. Storage slot; 19. First piston plate; 20. Support column; 21. First spring; 22. Second piston plate; 23. Second spring; 24. Stabilizing column; 25. Third piston plate; 26. Third spring; 27. Telescopic rod; 271. Outer sleeve; 272. Inner connecting rod; 273. Slide groove; 274. Fourth spring; 28. Rotating groove; 29. ​​Sealing plate; 30. Notch; 31. Slide; 32. Crossbar; 33. Toothed plate; 331. First meshing part; 332. Flat plate part; 333. Second meshing part; 34. Rotating shaft; 35. Gear; 36. Sleeve rod; 37. Torsion spring. Detailed Implementation

[0029] 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.

[0030] Example 1, please refer to Figures 1-8 An agricultural weeding device for easy adjustment of weeding height includes a vehicle body 1, a connecting rod 2 fixed to the rear of the vehicle body 1, a support frame 3 fixed to the end of the connecting rod 2, a first traveling wheel 4 rotatably mounted on the bottom of the support frame 3, a hydraulic oil tank 5 fixed to the end of the support frame 3, a connecting pipe 6 fixed to the outer surface of the hydraulic oil tank 5, an adjusting box 7 fixed to the end of the connecting pipe 6, a fixing rod 8 elastically connected to the bottom of the adjusting box 7, a positioning rod 9 fixed to the end of the fixing rod 8, several sets of flamethrowers 10 mounted on the positioning rod 9, and an air storage tank 11 for supplying air to the flamethrowers 10 mounted on the support frame 3.

[0031] The bottom of the hydraulic oil tank 5 is elastically connected to the mounting frame 12, and the mounting frame 12 is rotatably mounted with a second traveling wheel 13. The interior of the hydraulic oil tank 5 is provided with a first receiving groove 14 for filling hydraulic oil, and the interior of the regulating box 7 is provided with a second receiving groove 15 for filling hydraulic oil. The connecting pipe 6 is provided with an oil delivery groove 16, and the two ends of the oil delivery groove 16 are respectively connected to the first receiving groove 14 and the second receiving groove 15.

[0032] The bottom of the hydraulic oil tank 5 is provided with a partition 17, and a storage groove 18 is provided below the partition 17 for the mounting frame 12 to slide into. A first piston plate 19 is slidably arranged in the first receiving groove 14. A support column 20 is fixed between the first piston plate 19 and the mounting frame 12. The support column 20 passes through the partition 17 and is slidably connected to the partition 17. A first spring 21 is fixed between the first piston plate 19 and the partition 17.

[0033] A second piston plate 22 is slidably disposed in the second receiving groove 15. The end of the fixing rod 8 is fixedly connected to the second piston plate 22. A second spring 23 is fixed between the upper surface of the second piston plate 22 and the top of the adjusting box 7.

[0034] Several sets of stabilizing columns 24 are fixed between the outer surface of the hydraulic oil tank 5 and the outer surface of the regulating box 7.

[0035] In this technical solution, when weeding, the flamethrower 10 is first turned on, and gas is supplied to the flamethrower 10 through the gas tank 11, causing the flamethrower 10 to spray flames. Then, the vehicle body 1 moves. The vehicle body 1 is existing technology and can be a fuel-powered vehicle, an electric vehicle, or a manual vehicle. It is not an innovative point of this application and will not be described in detail. Figure 1 As shown, the vehicle body 1 moves to the left, and the vehicle body 1 drives the support frame 3 to move via the connecting rod 2. The support frame 3 moves via the first traveling wheel 4, and the support frame 3 drives the hydraulic oil tank 5 to move. The hydraulic oil tank 5 moves via the second traveling wheel 13, and the hydraulic oil tank 5 drives the regulating box 7 to move via the connecting pipe 6. The regulating box 7 drives the flamethrower 10 to move via the fixing rod 8, so that the flamethrower 10 moves with the vehicle body 1, and the flamethrower 10 performs the flame weeding work.

[0036] When the vehicle body 1 moves, causing the flamethrower 10 to move, the wheels of the vehicle body 1 and the first traveling wheel 4 travel on a flat surface, allowing the second traveling wheel 13 to travel on the surface requiring weeding. Since the surface requiring weeding may have a slope, when the second traveling wheel 13 moves to the sloped surface, as the road surface rises (i.e., uphill), due to the constraint of the support frame 3, the position of the hydraulic oil tank 5 remains unchanged. The second traveling wheel 13 moves upward along the road surface, causing the second traveling wheel 13 to move upward relative to the hydraulic oil tank 5. At this time, the second traveling wheel 13 drives the mounting frame 12 to move upward, the mounting frame 12 moves upward, driving the support column 20 to move upward, and the support column 20 moves upward, driving the first piston plate. 19 moves upward within the first receiving groove 14, while the first spring 21 is stretched and stored. The first piston plate 19 moves upward, filling the hydraulic oil inside the first receiving groove 14 into the second receiving groove 15 of the regulating box 7 through the oil delivery groove 16 of the connecting pipe 6. After the hydraulic oil is filled into the second receiving groove 15, the amount of hydraulic oil inside the second receiving groove 15 increases. At this time, it pushes the second piston plate 22 to move upward, the second spring 23 is compressed and stored, and the second piston plate 22 drives the fixed rod 8 to move upward. The fixed rod 8 drives the flamethrower 10 to move upward through the positioning rod 9, so that the second traveling wheel 13 can adjust the flamethrower 10 to move upward when going uphill, which is convenient for flame weeding treatment on the uphill slope.

[0037] When going downhill, the first spring 21 releases its force, pushing the support column 20 to move downward. The support column 20 pushes the second traveling wheel 13 to move downward. The support column 20 drives the first piston plate 19 to move downward, increasing the capacity of the first receiving groove 14. At this time, the second spring 23 releases its force, pushing the second piston plate 22 to move downward, drawing the hydraulic oil inside the second receiving groove 15 into the first receiving groove 14. At the same time, the second piston plate 22 moves downward, driving the flamethrower 10 to move downward, so that the second traveling wheel 13 can adjust the flamethrower 10 to move downward when going downhill, facilitating flame weed control at the downhill section.

[0038] In this technical solution, by fixing several sets of stabilizing columns 24 between the outer surface of the hydraulic oil tank 5 and the outer surface of the regulating box 7, the stability of the regulating box 7 can be increased and the safety of use can be improved; and the first piston plate 19 is sealed to the first receiving groove 14, and the second piston plate 22 is sealed to the second receiving groove 15, which facilitates the delivery of hydraulic oil.

[0039] In Example 2, to prevent the second traveling wheel 13 from being heated by the flame from the flamethrower 10 and damaged, the second traveling wheel 13 and the flamethrower 10 are positioned one in front of the other. However, with this design, when the second traveling wheel 13 moves uphill or downhill, it will drive the flamethrower 10 to move as soon as it starts moving. This means that the flamethrower 10 has already completed its adjustment before it has even passed the uphill or downhill section, thus affecting the flame weeding effect. To address this problem, this example is an improvement based on Example 1. For details, please refer to [link / reference]. Figures 1-8 A third piston plate 25 is slidably disposed on the top of the first receiving groove 14. A third spring 26 is fixed between the upper surface of the third piston plate 25 and the top of the hydraulic oil tank 5, and a telescopic rod 27 is fixed between the upper surface of the third piston plate 25 and the top of the hydraulic oil tank 5.

[0040] The telescopic rod 27 includes an outer sleeve 271 and an inner connecting rod 272. The outer sleeve 271 is fixed on the third piston plate 25, and the inner connecting rod 272 is fixed on the top of the hydraulic oil tank 5. A sliding groove 273 is provided inside the outer sleeve 271. The end of the inner connecting rod 272 is slidably disposed in the sliding groove 273, and a fourth spring 274 is fixed between the bottom of the sliding groove 273 and the end of the inner connecting rod 272.

[0041] In this technical solution, the third piston plate 25 is sealed to the first receiving groove 14. Both the third piston plate 25 and the second piston plate 22 are positioned above the oil delivery groove 16 and will not move below it to prevent obstruction. When the first piston plate 19 moves upward, it pushes the hydraulic oil inside the first receiving groove 14 upward. Because the initial opening diameter of the oil delivery groove 16 is small, the hydraulic oil first pushes the third piston plate 25 upward, causing it to move upward. The third spring 26 is compressed, and the telescopic rod 27 retracts. Simultaneously, a small portion of the hydraulic oil enters the second receiving groove 15 through the oil delivery groove 16. Because only a small portion of the hydraulic oil enters the second receiving groove 15, the upward movement of the flamethrower 10 is relatively low. When the first piston plate... After the first piston plate 19 moves upward, it remains stationary, the third spring 26 releases its force, and the telescopic rod 27 resets. At this time, the third piston plate 25 is pushed downward, and the third piston plate 25 moves downward, filling the hydraulic oil inside the first receiving groove 14 into the second receiving groove 15 through the oil supply groove 16. This causes the second piston plate 22 to move upward, driving the flamethrower 10 to adjust upward. Through the above process, the height of the flamethrower 10 can be adjusted with a delay when the second traveling wheel 13 is going uphill. This means that after the second traveling wheel 13 moves upward, the upward adjustment action of the flamethrower 10 needs to be delayed for a period of time to complete. This avoids the situation where the second traveling wheel 13 immediately drives the flamethrower 10 to move synchronously to the same height when it is going uphill, which would result in relatively poor weeding effect in some areas.

[0042] When the second traveling wheel 13 descends the slope, the first spring 21 releases its force, pulling the first piston plate 19 downwards, causing the second traveling wheel 13 to move downwards. As the first piston plate 19 moves downwards, to balance the negative pressure, the third piston plate 25 is first attracted and moves downwards, the third spring 26 is stretched and stores force, and the telescopic rod 27 extends. Simultaneously, a small portion of the hydraulic oil inside the second receiving groove 15 enters the first receiving groove 14 through the oil delivery groove 16, causing the second piston plate 22 to move downwards. Because only a small portion of the hydraulic oil enters the first receiving groove 14, the downward movement of the flamethrower 10 is relatively small. After the first piston plate 19 has moved completely downwards, it stops moving, and the third spring 26 releases its force. When the force is applied and the telescopic rod 27 is reset, the third piston plate 25 is pulled upward. The third piston plate 25 moves upward and draws the hydraulic oil inside the second receiving groove 15 into the first receiving groove 14 through the oil delivery groove 16. This causes the second piston plate 22 to move downward, driving the flamethrower 10 to adjust downward. Through the above process, the height of the flamethrower 10 can be adjusted with a delay when the second traveling wheel 13 is going downhill. This means that after the second traveling wheel 13 moves downhill, the downward adjustment action of the flamethrower 10 needs to be delayed for a period of time to complete. This avoids the situation where the second traveling wheel 13 immediately drives the flamethrower 10 to move synchronously to the same height when it is going downhill, which would result in relatively poor weeding effect in some places.

[0043] In this technical solution, the telescopic rod 27 is telescopic by sliding the inner rod 272 inside the groove 273 of the outer sleeve 271. The fourth spring 274 is provided to assist the telescopic rod 27 in resetting, thereby increasing the accuracy of the telescopic rod 27's movement.

[0044] In Example 3, when adjusting the height of the flamethrower 10 with a delay, if the oil supply channel 16 is too large, the hydraulic oil will flow through it more easily and quickly, affecting the delay adjustment effect and potentially failing to achieve the desired delay. However, if the oil supply channel 16 is too small, the hydraulic oil will flow more slowly, increasing the delay adjustment time. This could mean that the flamethrower 10 has reached the adjustment position before the delay adjustment is complete, preventing it from performing flame weed control at the appropriate location. This example addresses this issue by improving upon Example 2. For details, please refer to [link to example]. Figures 1-8 The connecting pipe 6 has a rotating groove 28 inside, and a sealing plate 29 is rotatably installed in the rotating groove 28. The sealing plate 29 has a notch 30 that communicates with the oil delivery tank 16. The sealing plate 29 changes the size of the opening of the oil delivery tank 16 by rotating.

[0045] A slide rail 31 is provided on the hydraulic oil tank 5. A crossbar 32 is slidably arranged in the slide rail 31. The end of the crossbar 32 is fixed to the telescopic rod 27. A toothed plate 33 is welded to the other end of the crossbar 32. The toothed plate 33 is slidably connected to the connecting pipe 6. A rotating shaft 34 is rotatably arranged in the rotating groove 28. A gear 35 that is connected to the gear 35 is fixed at the end of the rotating shaft 34. A sleeve rod 36 is fixed on the circumference of the rotating shaft 34. The end of the sleeve rod 36 is fixedly connected to the sealing plate 29.

[0046] The toothed plate 33 includes a first meshing part 331, a flat plate part 332, and a second meshing part 333;

[0047] A torsion spring 37 is sleeved on the circumference of the rotating shaft 34, and the two ends of the torsion spring 37 are fixed to the surface of the sleeve rod 36 and the inner wall of the rotating groove 28, respectively.

[0048] In this technical solution, when adjusting the delay height of the flamethrower 10, firstly, when the movement amplitude of the second traveling wheel 13 is small, the movement amplitude of the third piston plate 25 is also small. When the third piston plate 25 moves, it drives the telescopic rod 27 to move. The outer sleeve 271 of the telescopic rod 27 drives the crossbar 32 to move, causing the crossbar 32 to slide within the slide rail 31. The crossbar 32 drives the toothed plate 33 to move, such as... Figure 6 and Figure 7 As shown, since the movement of the third piston plate 25 is small, the gear 35 slides on the flat plate 332 of the tooth plate 33 and the gear 35 does not rotate. At this time, the hydraulic oil first passes through the oil delivery groove 16 and then enters the delivery through the notch 30. Since the aperture of the notch 30 is small, the amount of hydraulic oil passing through the notch 30 will also be relatively small. Thus, when the slope is not large, the hydraulic oil is delivered by the notch 30 with a smaller aperture to complete the delay adjustment of the flamethrower 10.

[0049] When the slope is steep, the flamethrower 10 first adjusts its height with a delay. Then, when the flamethrower 10 reaches the slope position, the second traveling wheel 13 continues to move upward, causing the third piston plate 25 to continue moving upward. The third piston plate 25 drives the telescopic rod 27 to retract, causing the outer sleeve 271 to drive the crossbar 32 to continue moving upward. The crossbar 32 drives the toothed plate 33 to continue moving upward, causing the second meshing part 333 of the toothed plate 33 to mesh with the gear 35. At this time, the toothed plate 33 moves upward, which can drive the gear 35 to rotate. The rotation of the gear 35 drives the rotating shaft 34 to rotate. The torsion spring 37 stores energy, and the rotation of the rotating shaft 34 drives the sleeve rod 36 to rotate to the right (e.g., Figure 6As shown), the sleeve rod 36 rotates to the right, causing the sealing plate 29 to rotate. The rotation of the sealing plate 29 gradually opens the oil supply tank 16, which can increase the amount of hydraulic oil passing through the oil supply tank 16. At this time, the third piston plate 25 moves downward to reset, which can more quickly press the hydraulic oil in the first receiving tank 14 into the second receiving tank 15, so that the flamethrower 10 can be quickly adjusted in height. When the third piston plate 25 moves downward to reset, it will drive the sealing plate 29 to rotate. The rotation of the sealing plate 29 will again gradually reduce the size of the opening of the oil supply tank 16, thereby controlling the timing of the flamethrower 10's height adjustment. This makes it convenient to quickly complete the height adjustment when the flamethrower 10 enters the lowest point of the uphill position.

[0050] By utilizing the gradually opening channel of the oil delivery trough 16, when facing different slopes (in a larger slope range), the second traveling wheel 13 first moves upward to different heights according to different slopes, driving the third piston plate 25 to move upward to different heights, thereby causing the sealing plate 29 to rotate to different amplitudes. This results in different opening sizes of the oil delivery trough 16 as it gradually opens, allowing the opening size of the oil delivery trough 16 to change according to the slope height. Consequently, the oil delivery rate of the oil delivery trough 16 varies when facing different slopes. By controlling the oil delivery rate inside the oil delivery trough 16, the speed of the flamethrower 10's action can be adjusted. Simultaneously, when the third piston plate 25 moves downward to reset, it also drives the sealing plate 29 to gradually reduce the opening size of the oil delivery trough 16, which can also meet the oil delivery rate requirements for different slopes. Through the above process, the delay adjustment time of the flamethrower 10 varies when facing different slopes, thus making the height adjustment of the flamethrower 10 more accurate.

[0051] After adjustment, the third piston plate 25 is reset, which drives the telescopic rod 27 to reset, causing the crossbar 32 and toothed plate 33 to reset. The gear 35 is reset along with the toothed plate 33, thereby causing the sealing plate 29 to reset, so that the sealing plate 29 blocks the oil delivery groove 16, allowing the hydraulic oil to be delivered through the groove 30.

[0052] When descending a slope, the third piston plate 25 moves downward, causing the telescopic rod 27 to extend. The outer sleeve 271 moves the crossbar 32 downward, and the crossbar 32 moves the toothed plate 33 downward, so that the first meshing part 331 meshes with the gear 35. At this time, the downward movement of the toothed plate 33 can drive the gear 35 to rotate. The gear 35 drives the rotating shaft 34 to rotate to the left, and the sleeve rod 36 rotates to the left, causing the sealing plate 29 to rotate. The rotation of the sealing plate 29 gradually opens the oil supply tank 16 again. At this time, the upward reset movement of the third piston plate 25 can more quickly draw the hydraulic oil inside the second receiving tank 15 into the first receiving tank 14, and can also quickly adjust the height of the flamethrower 10. When the third piston plate 25 moves upward, it will drive the sealing plate 29 to rotate. The rotation of the sealing plate 29 will gradually reduce the size of the opening of the oil supply tank 16, thereby controlling the timing of the flamethrower 10's height adjustment. This makes it convenient to quickly complete the height adjustment when the flamethrower 10 enters the highest point of the downhill position.

[0053] Through the above process, when the slope is large, the delay adjustment of the flamethrower 10 can be completed first. When the flamethrower 10 reaches the designated position, the adjustment action of the flamethrower 10 can be completed quickly, avoiding the problem that the height adjustment delay of the flamethrower 10 is too long, which would prevent the flamethrower 10 from performing flame weed removal in the appropriate position.

[0054] In this technical solution, the torsion spring 37 prevents the sealing plate 29 from being impacted by hydraulic oil when the rotating shaft 34 is not rotating, thus preventing accidental rotation and affecting the control of the hydraulic oil flow rate. This ensures that the rotating shaft 34 can only be driven to rotate by the gear 35.

[0055] 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.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An agricultural weeding device for easy adjustment of weeding height, comprising a vehicle body, characterized in that: A connecting rod is fixed to the rear of the vehicle body, and a support frame is fixed to the end of the connecting rod. A first traveling wheel is rotatably installed at the bottom of the support frame. A hydraulic oil tank is fixed to the end of the support frame. A connecting pipe is fixed to the outer surface of the hydraulic oil tank. An adjusting box is fixed to the end of the connecting pipe. A fixing rod is elastically connected to the bottom of the adjusting box. A positioning rod is fixed to the end of the fixing rod. Several sets of flamethrowers are installed on the positioning rod, and a gas storage tank for supplying gas to the flamethrowers is installed on the support frame. The bottom of the hydraulic oil tank is elastically connected to a mounting frame, and a second traveling wheel is rotatably mounted on the mounting frame. The inside of the hydraulic oil tank is provided with a first receiving groove for filling hydraulic oil, and the inside of the regulating box is provided with a second receiving groove for filling hydraulic oil. An oil delivery groove is opened in the connecting pipe, and the two ends of the oil delivery groove are respectively connected to the first receiving groove and the second receiving groove. The bottom of the hydraulic oil tank is provided with a partition, and a receiving groove for the installation frame to slide into is provided below the partition. A first piston plate is slidably arranged in the first receiving groove. A support column is fixed between the first piston plate and the installation frame. The support column passes through the partition and is slidably connected to the partition. A first spring is fixed between the first piston plate and the partition. A second piston plate is slidably disposed in the second receiving groove, the end of the fixing rod is fixedly connected to the second piston plate, and a second spring is fixed between the upper surface of the second piston plate and the top of the adjusting box. A third piston plate is slidably installed on the top of the first receiving tank, and a telescopic rod is fixed between the upper surface of the third piston plate and the top of the hydraulic oil tank. A rotating groove is opened inside the connecting pipe, and a sealing plate is rotatably installed in the rotating groove. The hydraulic oil tank has a slide rail, and a crossbar is slidably installed in the slide rail. The end of the crossbar is fixed to a telescopic rod, and a toothed plate is welded to the other end of the crossbar. The toothed plate is slidably connected to the connecting pipe. A rotating shaft is rotatably installed in the rotating groove. A gear that is connected to the toothed plate is fixed to the end of the rotating shaft. A sleeve is fixed on the circumference of the rotating shaft. The end of the sleeve is fixedly connected to the sealing plate. The toothed plate includes a first meshing part, a flat part, and a second meshing part.

2. The weeding device for agricultural use according to claim 1, wherein: Several sets of stabilizing columns are fixed between the outer surface of the hydraulic oil tank and the outer surface of the regulating box.

3. The weeding device for agricultural use according to claim 2, wherein: A third spring is fixed between the upper surface of the third piston plate and the top of the hydraulic oil tank.

4. The weeding device for agricultural use according to claim 3, characterized by: The telescopic rod includes an outer sleeve and an inner rod. The outer sleeve is fixed to the third piston plate, and the inner rod is fixed to the top of the hydraulic oil tank. A groove is provided inside the outer sleeve, and the end of the inner rod is slidably disposed in the groove. A fourth spring is fixed between the bottom of the groove and the end of the inner rod.

5. The weeding device for agricultural use according to claim 4, wherein: The sealing plate has a notch that communicates with the oil delivery tank. The sealing plate can change the size of the opening of the oil delivery tank by rotating.

6. The weeding device for agricultural use according to claim 5, wherein: A torsion spring is fitted around the circumference of the shaft, with its two ends fixed to the surface of the sleeve rod and the inner wall of the rotating groove, respectively.

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