Agricultural weeding device capable of conveniently adjusting weeding height

Abstract

The invention relates to the technical field of weeding, and discloses an agricultural weeding device facilitating weeding height adjustment, which comprises a vehicle body, a connecting rod is fixed at the tail part of the vehicle body, a support frame is fixed at the end part of the connecting rod, a hydraulic oil tank is fixed at the end part of the support frame, and a connecting pipeline is fixed on 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 sets of flamethrowers are installed on the positioning rod; according to the technical scheme, when flame weeding work is carried out, a second walking wheel moves up and down when passing through a slope, a first piston plate is driven to move, hydraulic oil reciprocates in a first containing groove and a second containing groove, then a second piston plate is driven to move, and the second piston plate drives a flame projector to move; and the height of the flame projector can be conveniently adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of weeding, in particular to an agricultural weeding device which is convenient for adjusting the weeding height. Background Art

[0002] Flame weeders are devices that use high-temperature flames to bake the surface of the field, causing weeds to lose water and die. Flame weeders are generally powered by oil, electricity or manual power, allowing the flame weeder to move in the field. Usually, a gas transmission pipe is used to transport gas to several flamethrowers to spray fire and remove weeds.

[0003] When a flame weeder removes weeds by flame, the outer flame is used to bake the weeds because the temperature of the flame is high while the temperature of the inner flame is relatively low. However, during the travel of the flame weeder, the flame spray height needs to be adjusted to a suitable position. Since there are some ground surfaces of different heights in the fields and the height of the flamethrower is not convenient to adjust during travel, when the flame weeder passes over these ground surfaces, the height of the flame from the ground may be inappropriate, so that the temperature of the outer flame cannot be fully utilized for weeding, thereby reducing the weeding effect. Summary of the invention

[0004] The present invention provides an agricultural weeding device with an easily adjustable weeding height. The second traveling wheel can move up and down when passing through ground with different heights. The up and down movement of the second traveling wheel can drive the first piston plate to move, so that the hydraulic oil reciprocates in the first receiving groove and the second receiving groove. The movement of the hydraulic oil drives the second piston plate to move, so that the second piston plate drives the flamethrower to move, and the height of the flamethrower is adjusted. This solves the problem mentioned in the above background technology that the height of the flamethrower is inconvenient to adjust during the travel process, so that when the flame weeder passes through ground with different heights, the height of the flame from the ground may be inappropriate, so that the temperature of the outer flame cannot be fully utilized for weeding, thereby reducing the weeding effect.

[0005] The present invention provides the following technical solution: an agricultural weeding device that is easy to adjust the weeding height, comprising a vehicle body, a connecting rod is fixed to the rear of the vehicle body, a support frame is fixed to the end of the connecting rod, a first walking wheel is rotatably provided 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 adjustment box is fixed to the end of the connecting pipe, a fixing rod is elastically connected to the bottom of the adjustment box, a positioning rod is fixed to the end of the fixing rod, a plurality of groups 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, a second traveling wheel is rotatably provided on the mounting frame, a first receiving tank for filling hydraulic oil is provided inside the hydraulic oil tank, a second receiving tank for filling hydraulic oil is provided inside the regulating box, an oil delivery tank is provided in the connecting pipeline, and both ends of the oil delivery tank are respectively connected to the first receiving tank and the second receiving tank.

[0006] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, a partition is provided at the bottom of the hydraulic oil tank, and a receiving groove for the mounting frame to slide into is provided below the partition, a first piston plate is slidably provided in the first receiving groove, 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, and a first spring is fixed between the first piston plate and the partition.

[0007] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, a second piston plate is slidably arranged in the second accommodating 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.

[0008] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, a plurality of groups of stabilizing columns are fixed between the outer surface of the hydraulic oil tank and the outer surface of the adjustment box.

[0009] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, a third piston plate is slidably arranged on the top of the first accommodating 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.

[0010] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, the telescopic rod includes an outer sleeve and an inner rod, the outer sleeve is fixed to the third piston plate, the inner rod is fixed to the top of the hydraulic oil tank, a slide groove is opened inside the outer sleeve, the end of the inner rod is slidably arranged in the slide groove, and a fourth spring is fixed between the bottom of the slide groove and the end of the inner rod.

[0011] As an optional solution of the agricultural weeding device with easy adjustment of weeding height described in the present invention, a rotating groove is opened inside the connecting pipe, a sealing piece is rotatably arranged in the rotating groove, a missing groove connected to the oil conveying tank is opened on the sealing piece, and the sealing piece changes the opening size of the oil conveying tank by rotating.

[0012] As an optional solution of the agricultural weeding device that is easy to adjust the weeding height described in the present invention, a slideway is provided on the hydraulic oil tank, a cross bar is slidably arranged in the slideway, the end of the cross bar is fixed on the telescopic rod, a tooth plate is welded to the other end of the cross bar, the tooth plate is slidably connected to the connecting pipe, a rotating shaft is rotatably arranged in the rotating groove, a gear that is transmission-connected to the tooth plate is fixed at the end of the rotating shaft, a sleeve rod is fixed on the circumference of the rotating shaft, and the end of the sleeve rod is fixedly connected to the sealing plate.

[0013] As an optional solution of the agricultural weeding device with easy adjustment of weeding height of the present invention, the tooth plate includes a first meshing portion, a flat plate portion and a second meshing portion.

[0014] As an optional solution of the agricultural weeding device with easy adjustment of weeding height of the present 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.

[0015] The present invention has the following beneficial effects: 1. In the agricultural weeding device that is easy to adjust the weeding height, when the vehicle body moves in the field, when encountering different heights of the ground, the second running wheel can move up and down, the second running wheel moves up and down, driving the first piston plate to move up and down in the first receiving groove, the first piston plate moves up and down, so that the hydraulic oil can flow between the first receiving groove and the second receiving groove through the oil conveying groove, so that the second piston plate moves up and down in the second receiving groove, the second piston plate moves up and down, can drive the flamethrower to move up and down, so that it is convenient to adjust the height of the flamethrower during the travel process, so as to improve the weeding effect.

[0016] 2. In the agricultural weeding device that is easy to adjust the weeding height, when the height of the flamethrower is adjusted, the third piston plate is provided, and the first piston plate moves up and down, driving the hydraulic oil in the first receiving groove to flow. When the hydraulic oil flows through the oil delivery groove, the pressure inside the first receiving groove can be balanced by the up and down movement of the third piston plate, so that the hydraulic oil flowing through the oil delivery groove is reduced, thereby reducing the movement amount of the second piston plate, so that the first piston plate and the second piston plate cannot move synchronously with the same amplitude. Only when the first piston plate stops moving after the movement is completed, the hydraulic oil is transported again by resetting the third piston plate, so that the second piston plate continues to move until it moves to the same amplitude as the first piston plate. Therefore, when the flamethrower is adjusted, the flamethrower can be delayed in height adjustment, so that when the second walking wheel passes through the uneven ground, the flamethrower cannot immediately move with the second walking wheel by the same amplitude, but through the delayed height adjustment, the flamethrower can complete the height adjustment when the flamethrower reaches the uneven ground, thereby facilitating weeding on the uneven ground; 3. In the agricultural weeding device that is easy to adjust the weeding height, when the flamethrower performs delayed height adjustment, the telescopic rod drives the cross bar to move, the cross bar drives the toothed plate to move, the toothed plate drives the gear to rotate, and the gear drives the blocking plate to rotate, so that the blocking plate completely opens the oil conveying groove, thereby facilitating the adjustment of the flow aperture of the oil conveying groove. By adjusting the flow aperture of the oil conveying groove, the speed of the hydraulic oil flowing between the first receiving groove and the second receiving groove is increased, thereby changing the speed of the flamethrower height adjustment, so that when the flow aperture of the oil conveying groove is small, the height adjustment of the flamethrower is slow, and the purpose of delayed height adjustment is achieved. When the flow aperture of the oil conveying groove is large, the height adjustment of the flamethrower is fast, so that the flamethrower can be quickly adjusted to a suitable position, thereby improving the rationality of the delayed height adjustment and further improving the effect of flame weeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a three-dimensional structural cross-sectional view of the hydraulic oil tank and the regulating box part of the present invention.

[0019] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle.

[0020] Figure 4 For the present invention Figure 2 Structural cross-sectional view of the middle telescopic rod.

[0021] Figure 5 It is a cross-sectional view of the internal structure of the connecting pipe part of the present invention.

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting pipeline part of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure inside the connecting pipe of the present invention.

[0024] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0025] In the figure: 1, vehicle body; 2, connecting rod; 3, support frame; 4, first running wheel; 5, hydraulic oil tank; 6, connecting pipe; 7, adjustment box; 8, fixing rod; 9, positioning rod; 10, flamethrower; 11, gas storage tank; 12, mounting frame; 13, second running wheel; 14, first containing tank; 15, second containing tank; 16, oil delivery tank; 17, partition; 18, storage tank; 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 rod; 273. Slide groove; 274. Fourth spring; 28. Rotation groove; 29. ​​Blocking plate; 30. Notch; 31. Slideway; 32. Crossbar; 33. Tooth plate; 331. First meshing part; 332. Flat plate; 333. Second meshing part; 34. Rotating shaft; 35. Gear; 36. Sleeve rod; 37. Torsion spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0027] For example, see Figure 1-Figure 8 A weeding device for agricultural use that is easy to adjust the weeding height, comprising a vehicle body 1, a connecting rod 2 is fixed to the rear of the vehicle body 1, a support frame 3 is fixed to the end of the connecting rod 2, a first walking wheel 4 is rotatably provided at the bottom of the support frame 3, a hydraulic oil tank 5 is fixed to the end of the support frame 3, a connecting pipe 6 is fixed to the outer surface of the hydraulic oil tank 5, an adjusting box 7 is fixed to the end of the connecting pipe 6, a fixing rod 8 is elastically connected to the bottom of the adjusting box 7, a positioning rod 9 is fixed to the end of the fixing rod 8, a plurality of groups of flamethrowers 10 are installed on the positioning rod 9, and a gas storage tank 11 for supplying gas to the flamethrowers 10 is installed on the support frame 3; The bottom of the hydraulic oil tank 5 is elastically connected with a mounting frame 12, and a second travel wheel 13 is rotatably provided on the mounting frame 12. A first receiving tank 14 for filling hydraulic oil is provided inside the hydraulic oil tank 5, and a second receiving tank 15 for filling hydraulic oil is provided inside the regulating box 7. An oil delivery tank 16 is provided in the connecting pipe 6, and both ends of the oil delivery tank 16 are connected to the first receiving tank 14 and the second receiving tank 15 respectively. A partition 17 is provided at the bottom of the hydraulic oil tank 5, and a receiving groove 18 for the installation frame 12 to slide into is provided below the partition 17. A first piston plate 19 is slidably provided in the first receiving groove 14, and a support column 20 is fixed between the first piston plate 19 and the installation frame 12. The support column 20 penetrates 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; A second piston plate 22 is slidably disposed in the second receiving groove 15, an end of the fixing rod 8 is fixedly connected to the second piston plate 22, and a second spring 23 is fixed between the upper surface of the second piston plate 22 and the top of the regulating box 7; A plurality of groups 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 .

[0028] In the technical solution, when weeding, the flamethrower 10 is first turned on, and gas is supplied to the flamethrower 10 through the gas tank 11, so that the flamethrower 10 sprays flames, and then the vehicle body 1 moves. The vehicle body 1 is a prior art, which can be a fuel vehicle, an electric vehicle or a manual vehicle. It is not an innovative point of the present application and will not be described in detail. Figure 1 As shown, the vehicle body 1 moves to the left, the vehicle body 1 drives the support frame 3 to move through the connecting rod 2, the support frame 3 moves through the first running wheel 4, the support frame 3 drives the hydraulic oil tank 5 to move, the hydraulic oil tank 5 moves through the second running wheel 13, the hydraulic oil tank 5 drives the adjustment box 7 to move through the connecting pipe 6, and the adjustment box 7 drives the flamethrower 10 to move through the fixing rod 8, so that the flamethrower 10 moves with the movement of the vehicle body 1, so that the flamethrower 10 performs flame weeding work.

[0029] When the vehicle body 1 moves and drives the flamethrower 10 to move, the wheels of the vehicle body 1 and the first running wheels 4 run on the flat ground, so that the second running wheels 13 run on the ground where weeding is required. Since the ground where weeding is required may have a slope, when the second running wheels 13 move to the ground with a slope, when the road surface rises, that is, when going uphill, due to the limitation of the support frame 3, the position of the hydraulic oil tank 5 remains unchanged, and the second running wheels 13 move upward along the road surface, so that the second running wheels 13 move upward relative to the hydraulic oil tank 5. At this time, the second running wheels 13 drive the mounting frame 12 to move upward, and the mounting frame 12 moves upward to drive the support column 20 to move upward, and the support column 20 moves upward to drive the first piston plate 19 moves upward in the first receiving groove 14, and at the same time the first spring 21 is stretched and stored, the first piston plate 19 moves upward, and the hydraulic oil inside the first receiving groove 14 is filled 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 hydraulic oil inside the second receiving groove 15 becomes more, and at this time the second piston plate 22 is pushed to move upward, the second spring 23 is compressed and stored, and the second piston plate 22 drives the fixing rod 8 to move upward, and the fixing rod 8 drives the flamethrower 10 to move upward through the positioning rod 9, so that the second walking wheel 13 can adjust the flamethrower 10 to move upward when going uphill, so as to facilitate flame weeding treatment at the uphill place; When going downhill, the first spring 21 releases force, pushing the support column 20 to move downward, and the support column 20 pushes the second walking wheel 13 to move downward. The support column 20 drives the first piston plate 19 to move downward, so that the capacity of the first receiving groove 14 becomes larger. At this time, the second spring 23 releases force, pushing the second piston plate 22 to move downward, and the hydraulic oil inside the second receiving groove 15 is sucked 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 walking wheel 13 can adjust the flamethrower 10 to move downward when going downhill, which is convenient for flame weeding at the downhill.

[0030] In the present technical solution, a plurality of groups 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. The plurality of stabilizing columns 24 can increase the stability of the regulating box 7 and improve the safety of use. The first piston plate 19 is sealed with the first receiving groove 14, and the second piston plate 22 is sealed with the second receiving groove 15, so as to facilitate the transportation of hydraulic oil.

[0031] In the second embodiment, in order to prevent the second traveling wheel 13 from being heated by the flame ejected by the flamethrower 10 and causing damage to the second traveling wheel 13, the second traveling wheel 13 and the flamethrower 10 are arranged front and back. However, when this design is adopted, when the second traveling wheel 13 goes uphill and downhill, as long as the second traveling wheel 13 starts to move, it will drive the flamethrower 10 to move, so that the flamethrower 10 has completed the adjustment before it passes the uphill and downhill places, thereby affecting the flame weeding effect. In view of this problem, this embodiment is an improvement made on the basis of the first embodiment. For details, please refer to Figure 1-Figure 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; The telescopic rod 27 includes an outer sleeve 271 and an inner rod 272. The outer sleeve 271 is fixed on the third piston plate 25, and the inner rod 272 is fixed on the top of the hydraulic oil tank 5. A slide groove 273 is opened inside the outer sleeve 271, and the end of the inner rod 272 is slidably set in the slide groove 273, and a fourth spring 274 is fixed between the bottom of the slide groove 273 and the end of the inner rod 272.

[0032] In the present technical solution, the third piston plate 25 is sealed with the first receiving groove 14, and the third piston plate 25 and the second piston plate 22 are both arranged above the oil delivery groove 16 and will not move below the oil delivery groove 16 to prevent the oil delivery groove 16 from being blocked. When the first piston plate 19 moves upward, the hydraulic oil inside the first receiving groove 14 is pushed to move upward. Since the aperture of the opening of the oil delivery groove 16 is initially small, the hydraulic oil will first push the third piston plate 25 upward to move the third piston plate 25 upward, and the third piston plate 25 will move upward. The third spring 26 is compressed, and the telescopic rod 27 contracts. At the same time, a small amount of hydraulic oil will enter the second receiving groove 15 through the oil delivery groove 16. Because only a small amount of hydraulic oil enters the second receiving groove 15, the upward movement of the flamethrower 10 is relatively low. When the first piston plate After 19 moves upward, the first piston plate 19 does not move, the third spring 26 releases force, and the telescopic rod 27 is reset. At this time, the third piston plate 25 is pushed downward, and the third piston plate 25 moves downward, and the hydraulic oil in the first receiving groove 14 is filled into the second receiving groove 15 through the oil delivery groove 16, so that the second piston plate 22 moves upward, driving the flamethrower 10 to adjust upward. Through the above process, when the second walking wheel 13 goes uphill, the height of the flamethrower 10 can be delayed to adjust, so that after the second walking wheel 13 moves upward first, the upward adjustment action of the flamethrower 10 needs to be delayed for a period of time to complete, thereby avoiding the situation that the second walking wheel 13 moves uphill and immediately drives the flamethrower 10 to move synchronously to the same height, which leads to relatively poor weeding effect in some positions; When the second traveling wheel 13 goes downhill, the first spring 21 releases force, and the first spring 21 pulls the first piston plate 19 to move downward, so that the second traveling wheel 13 moves downward. When the first piston plate 19 moves downward, in order to balance the negative pressure, the third piston plate 25 is first adsorbed and moves downward, and the third spring 26 is stretched and stored, and the telescopic rod 27 is extended. At the same time, a small amount of hydraulic oil in the second receiving groove 15 enters the first receiving groove 14 through the oil delivery groove 16, so that the second piston plate 22 moves downward. Because only a small amount of hydraulic oil enters the first receiving groove 14, the downward movement of the flamethrower 10 is relatively low. When the first piston plate 19 has moved downward completely, the first piston plate 19 does not move, and the third spring 26 releases force. The third piston plate 25 is pulled upward, and the third piston plate 25 moves upward, sucking the hydraulic oil in the second receiving groove 15 into the first receiving groove 14 through the oil delivery groove 16, so that the second piston plate 22 moves downward, driving the flamethrower 10 to adjust downward. Through the above process, when the second walking wheel 13 moves downhill, the height of the flamethrower 10 can also be delayed. Adjustment, so that after the second walking wheel 13 moves downward first, the downward adjustment action of the flamethrower 10 needs to be delayed for a period of time to be completed, thereby avoiding the second walking wheel 13 moving downhill and immediately driving the flamethrower 10 to move synchronously to the same height, which leads to relatively poor weeding effect in some positions.

[0033] In the present technical solution, the inner rod 272 slides inside the slide groove 273 of the outer sleeve 271 to achieve the telescopic action of the telescopic rod 27, and the fourth spring 274 is provided to assist the telescopic rod 27 in resetting, thereby increasing the accuracy of the action of the telescopic rod 27.

[0034] In the third embodiment, when the flamethrower 10 is delayed in height adjustment, if the oil delivery groove 16 is opened too large, it will be more convenient for the hydraulic oil to pass through the oil delivery groove 16, so that the hydraulic oil flows faster, thereby affecting the effect of the delay adjustment of the flamethrower 10, and the purpose of the delay adjustment may not be achieved. However, if the oil delivery groove 16 is opened too small, the hydraulic oil will flow slower, thereby increasing the delay adjustment time of the flamethrower 10, so that when the flamethrower 10 has reached the adjustment position, the delay adjustment of the flamethrower 10 has not been completed, so that the flamethrower 10 cannot perform flame weeding at a suitable position. In view of this problem, this embodiment is an improvement made on the basis of the second embodiment. For details, please refer to Figure 1-Figure 8 A rotating groove 28 is provided inside the connecting pipe 6, a sealing piece 29 is rotatably provided inside the rotating groove 28, a missing groove 30 communicating with the oil delivery groove 16 is provided on the sealing piece 29, and the sealing piece 29 changes the opening size of the oil delivery groove 16 by rotating; A slideway 31 is provided on the hydraulic oil tank 5, a cross bar 32 is slidably arranged in the slideway 31, the end of the cross bar 32 is fixed on the telescopic rod 27, a tooth plate 33 is welded to the other end of the cross bar 32, the tooth 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 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, and the end of the sleeve rod 36 is fixedly connected to the blocking piece 29; The tooth plate 33 includes a first meshing portion 331, a flat plate portion 332 and a second meshing portion 333; A torsion spring 37 is sleeved on the circumference of the rotating shaft 34 , and two ends of the torsion spring 37 are respectively fixed on the surface of the sleeve rod 36 and the inner wall of the rotating groove 28 .

[0035] In the present technical solution, when the flamethrower 10 is adjusted for a delayed height, first, when the second walking wheel 13 moves with a small amplitude, the third piston plate 25 also moves with a small amplitude. When the third piston plate 25 moves, the telescopic rod 27 is driven to move, and the outer sleeve 271 of the telescopic rod 27 drives the cross bar 32 to move, so that the cross bar 32 slides in the slideway 31, and the cross bar 32 drives the tooth plate 33 to move, such as Figure 6 and Figure 7 As shown, since the third piston plate 25 moves in a small amplitude, the gear 35 slides on the flat plate portion 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 through the notch 30 for delivery. Since the aperture of the notch 30 is small, the amount of hydraulic oil passing through the notch 30 is also relatively small. Therefore, when the slope is not large, the notch 30 with a smaller aperture is used to deliver the hydraulic oil to complete the delay adjustment of the flamethrower 10.

[0036] When the slope is large, the flamethrower 10 first performs a delayed height adjustment, and then when the flamethrower 10 enters the slope position, the second walking wheel 13 continues to move upward, so that the third piston plate 25 continues to move upward, and the third piston plate 25 drives the telescopic rod 27 to contract, so that the outer sleeve 271 drives the cross bar 32 to continue to move upward, and the cross bar 32 drives the tooth plate 33 to continue to move upward, so that the second meshing portion 333 of the tooth plate 33 meshes with the gear 35. At this time, the tooth plate 33 moves upward, which can drive the gear 35 to rotate, and the rotation of the gear 35 drives the rotating shaft 34 to rotate, the torsion spring 37 accumulates force, and the rotation of the rotating shaft 34 drives the sleeve rod 36 to rotate right (such as Figure 6As shown in the figure), the sleeve rod 36 rotates rightward to drive the blocking piece 29 to rotate, and the blocking piece 29 rotates to gradually open the oil delivery groove 16, which can increase the amount of hydraulic oil passing through the oil delivery groove 16. At this time, the third piston plate 25 is reset downward to more quickly press the hydraulic oil in the first receiving groove 14 into the second receiving groove 15, so that the flamethrower 10 can be quickly adjusted in height. When the third piston plate 25 is reset downward, it will drive the blocking piece 29 to rotate. The blocking piece 29 rotates to gradually reduce the opening size of the oil delivery groove 16 again, thereby controlling the timing of the completion of the height adjustment of the flamethrower 10, so as to facilitate the flamethrower 10 to quickly complete the height adjustment when it enters the lowest point of the uphill position. By utilizing the gradually opened channel of the oil delivery groove 16, when facing different slopes (in a larger range of slopes), first, the second walking wheel 13 moves upward to different heights according to different slopes, driving the third piston plate 25 to move upward to different heights, so that the blocking piece 29 rotates to different amplitudes, so that the opening size of the oil delivery groove 16 is also different when it is gradually opened, so that the opening size of the oil delivery groove 16 changes in accordance with the height change of the slope, so that the oil delivery rate of the oil delivery groove 16 is different when facing different slopes. By controlling the oil delivery rate inside the oil delivery groove 16, the speed of the flamethrower 10 can be adjusted. At the same time, when the third piston plate 25 is reset downward, it also drives the blocking piece 29 to gradually reduce the opening size of the oil delivery groove 16, which can also meet the requirements of the oil delivery rate when different slopes are encountered. Through the above process, the delay adjustment time of the flamethrower 10 is different when facing different slopes, so that the height adjustment of the flamethrower 10 is more accurate.

[0037] After the adjustment is completed, the third piston plate 25 is reset, driving the telescopic rod 27 to reset, so that the cross bar 32 and the tooth plate 33 are reset, and the gear 35 is reset along with the tooth plate 33, so that the blocking plate 29 is reset, so that the blocking plate 29 blocks the oil delivery groove 16, so that the hydraulic oil is delivered through the missing groove 30; When going downhill, the third piston plate 25 drives the telescopic rod 27 to extend downward, the outer sleeve 271 drives the cross bar 32 to move downward, and the cross bar 32 drives the toothed plate 33 to move downward, so that the first meshing portion 331 meshes with the gear 35. At this time, the toothed plate 33 moves downward to drive the gear 35 to rotate, and the gear 35 drives the rotating shaft 34 to rotate leftward. The sleeve rod 36 rotates leftward to drive the blocking plate 29 to rotate, and the blocking plate 29 rotates to gradually open the oil delivery groove 16 again. At this time, the third piston plate 25 is reset upward to more quickly suck the hydraulic oil in the second receiving groove 15 into the first receiving groove 14, and the flamethrower 10 can also be quickly adjusted in height. When the third piston plate 25 is reset upward, it will drive the blocking plate 29 to rotate, and the blocking plate 29 rotates to gradually reduce the opening size of the oil delivery groove 16 again, thereby controlling the timing of completing the height adjustment of the flamethrower 10, so as to facilitate the flamethrower 10 to quickly complete the height adjustment when it enters the highest point of the downhill position. Through the above process, when the slope is large, the delay adjustment of the flamethrower 10 can be completed first, and when the flamethrower 10 reaches the specified 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, making the flamethrower 10 unable to perform flame weeding at a suitable position.

[0038] In the present technical solution, the torsion spring 37 is provided to prevent the sealing plate 29 from being impacted by the hydraulic oil when the shaft 34 is not rotating, thereby preventing the sealing plate 29 from being erroneously rotated and affecting the control of the flow rate of the hydraulic oil, so that the shaft 34 can only rotate through the rotation of the gear 35.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An agricultural weeding device with an adjustable weeding height, comprising a vehicle body (1), characterized in that: A connecting rod (2) is fixed to the rear of the vehicle body (1), a support frame (3) is fixed to the end of the connecting rod (2), a first running wheel (4) is rotatably provided at the bottom of the support frame (3), a hydraulic oil tank (5) is fixed to the end of the support frame (3), a connecting pipe (6) is fixed to the outer surface of the hydraulic oil tank (5), an adjusting box (7) is fixed to the end of the connecting pipe (6), a fixing rod (8) is elastically connected to the bottom of the adjusting box (7), a positioning rod (9) is fixed to the end of the fixing rod (8), a plurality of groups of flamethrowers (10) are installed on the positioning rod (9), and a gas storage tank (11) for supplying gas to the flamethrowers (10) is installed on the support frame (3); The bottom of the hydraulic oil tank (5) is elastically connected to a mounting frame (12), a second travel wheel (13) is rotatably provided on the mounting frame (12), a first receiving groove (14) for filling hydraulic oil is provided inside the hydraulic oil tank (5), a second receiving groove (15) for filling hydraulic oil is provided inside the regulating box (7), an oil delivery groove (16) is provided inside the connecting pipe (6), and two ends of the oil delivery groove (16) are respectively connected to the first receiving groove (14) and the second receiving groove (15).

2. The agricultural weeding device with adjustable weeding height according to claim 1, characterized in that: A partition (17) is provided at the bottom of the hydraulic oil tank (5), and a receiving groove (18) is provided below the partition (17) for the installation frame (12) to slide into. A first piston plate (19) is slidably provided in the first receiving groove (14), and a support column (20) is fixed between the first piston plate (19) and the installation frame (12). The support column (20) passes through the partition (17) and is slidably connected to the partition (17), and a first spring (21) is fixed between the first piston plate (19) and the partition (17).

3. The agricultural weeding device with adjustable weeding height according to claim 2, characterized in that: 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), and a second spring (23) is fixed between the upper surface of the second piston plate (22) and the top of the regulating box (7).

4. The agricultural weeding device with adjustable weeding height according to claim 3, characterized in that: A plurality of groups 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).

5. The agricultural weeding device with adjustable weeding height according to claim 4, characterized in that: A third piston plate (25) is slidably disposed at the top of the first accommodating 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).

6. The agricultural weeding device with adjustable weeding height according to claim 5, characterized in that: The telescopic rod (27) comprises an outer sleeve (271) and an inner connecting rod (272); the outer sleeve (271) is fixed on the third piston plate (25); the inner connecting rod (272) is fixed on the top of the hydraulic oil tank (5); a slide groove (273) is provided inside the outer sleeve (271); the end of the inner connecting rod (272) is slidably arranged in the slide groove (273); and a fourth spring (274) is fixed between the bottom of the slide groove (273) and the end of the inner connecting rod (272).

7. The agricultural weeding device with adjustable weeding height according to claim 6, characterized in that: A rotating groove (28) is provided inside the connecting pipe (6), a sealing piece (29) is rotatably arranged inside the rotating groove (28), a notch (30) communicating with the oil delivery groove (16) is provided on the sealing piece (29), and the sealing piece (29) changes the opening size of the oil delivery groove (16) by rotating.

8. The agricultural weeding device with adjustable weeding height according to claim 7, characterized in that: The hydraulic oil tank (5) is provided with a slideway (31), a cross bar (32) is slidably arranged in the slideway (31), the end of the cross bar (32) is fixed on the telescopic rod (27), a tooth plate (33) is welded to the other end of the cross bar (32), the tooth 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) drivingly connected to the tooth plate (33) is fixed at the end of the rotating shaft (34), a sleeve rod (36) is fixed on the circumference of the rotating shaft (34), and the end of the sleeve rod (36) is fixedly connected to the blocking plate (29).

9. The agricultural weeding device with adjustable weeding height according to claim 8, characterized in that: The tooth plate (33) comprises a first meshing portion (331), a flat plate portion (332) and a second meshing portion (333).

10. The agricultural weeding device with adjustable weeding height according to claim 9, characterized in that: A torsion spring (37) is sleeved on the circumference of the rotating shaft (34), and two ends of the torsion spring (37) are respectively fixed on the surface of the sleeve rod (36) and the inner wall of the rotating groove (28).

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