An inter-row weeding machine

Abstract

The present invention relates to an inter-row weeder, comprising a ground wheel, a base is pivotally connected to the ground wheel, a first telescopic rod capable of upward and downward limit telescopic extension is arranged on the top of the base, a mounting bracket is arranged on the first telescopic rod, a second telescopic rod is mounted on the mounting bracket, a screw motor is also mounted on the mounting bracket, a fixing plate is fixedly connected to the screw motor; a first connecting piece is fixedly connected to the second telescopic rod, a steering motor electrically connected to a horizontal sensor is mounted on the first connecting piece, the steering motor is transmission-connected to a connecting rod assembly, a third telescopic rod is arranged on the connecting rod assembly, a touch rod is arranged at the lower end of the third telescopic rod; a second connecting piece is fixedly connected to the front end of the connecting rod assembly, a weeding mechanism is fixedly connected to the second connecting piece. The invention is convenient to operate, can avoid obstacles, protect crops, can automatically adjust the blade to be parallel to the ground, and improves the safety of blade use.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery, in particular to an inter-row weeder. Background Art

[0002] Agriculture is one of the three pillar industries in human life. Effectively increasing the yield of crops can provide more food such as grain and vegetables on limited land to meet people's living needs. Removing weeds from crops and ensuring that crops absorb water and nutrients is the most basic method. In the past, weeding was done manually, which was inefficient. Mechanical weeding has been introduced, which has improved efficiency and reduced people's labor intensity. With the development of society, different equipment corresponds to different operating methods. Inter-row weeding is a way to remove weeds as much as possible while ensuring the safety of crops. In the existing technology, general inter-row weeding uses a knife disc and a blade to rotate at high speed for weeding. In scenes with more sand and gravel, it is very easy to break the blade and cause danger. At the same time, the angle of the blade is fixed, and the angle of the blade cannot be adjusted in real time according to the conditions of the weeding ground. The operation is inconvenient, the weeding efficiency is low, and the high-speed rotation consumes a lot of energy, which is limited in the application of some scenes. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides an inter-row weeder.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a row weeder includes a ground wheel, an inverted U-shaped base is pivotally connected to the ground wheel, a first telescopic rod that can be extended and retracted up and down is arranged on the top of the base, a mounting bracket is arranged on the end of the first telescopic rod away from the base, a second telescopic rod whose extension direction is perpendicular to the extension direction of the first telescopic rod and can be extended and retracted in a limited manner is installed on the mounting bracket, a screw motor is also installed on the mounting bracket, and a fixing plate is fixedly connected to the output shaft of the screw motor; a first connecting piece is fixedly connected to the end of the second telescopic rod away from the mounting bracket, a steering motor electrically connected to a horizontal sensor is installed on the first connecting piece, and the steering motor is connected to a connecting rod assembly that can perform parallel reciprocating displacement through an angular contact ball bearing transmission, and the connecting rod assembly A third telescopic rod that can be extended and retracted up and down is provided on the side away from the mounting bracket, and a touch rod that can rotate forward and backward relative to the connecting rod assembly is provided at the lower end of the third telescopic rod; the front end of the connecting rod assembly is fixedly connected to a second connecting piece, and an end of the second connecting piece away from the connecting rod assembly is fixedly connected to a weeding mechanism; the weeding mechanism includes a main knife and an auxiliary knife with their blades both facing the touch rod and formed at an acute angle therebetween, a main knife fixing plate for mounting the main knife, and an auxiliary knife fixing plate for mounting the auxiliary knife, the main knife fixing plate and the auxiliary knife fixing plate being mounted on the second connecting piece at the same height, and the main knife fixing plate is located between the auxiliary knife fixing plate and the touch rod; the main knife forms an obtuse angle with the horizontal plane in the direction of the touch rod; the auxiliary knife extends outward and upward at the end away from the auxiliary knife fixing plate, and is bent in the direction away from the touch rod.

[0005] Preferably, the connecting rod assembly includes a connecting rod and two connecting rod connectors correspondingly arranged at both ends of the connecting rod, the connecting rod is pivotally connected to the connecting rod connector via a connecting rod pivot shaft arranged on the connecting rod connector, wherein the connecting rod connector at the front end of the connecting rod is connected to the second connecting member, and the connecting rod connector at the rear end of the connecting rod is fixedly connected to a rotating shaft, and the rotating shaft is transmission-connected to the steering motor via an angular contact ball bearing, the third telescopic rod is fixedly connected to the side wall of the connecting rod, and the touch rod is fixedly connected to the lower end of the third telescopic rod.

[0006] Preferably, a tension spring and a stud are also provided on the top of the two connecting rod connectors, the two ends of the tension spring are correspondingly fixedly connected to the two connecting rod connectors and the connecting positions on the two connecting rod connectors are diagonally arranged, and the two ends of the stud are correspondingly pivoted to the two connecting rod connectors and pivoted on the same side.

[0007] Preferably, the first telescopic rod, the second telescopic rod and the third telescopic rod all include an inner rod and an outer rod movably mounted outside the inner rod, each of the inner rod is provided with a plurality of first positioning holes at intervals along its axial direction, and each of the outer rod is provided with a second positioning hole at an end adjacent to the inner rod, and the corresponding inner rod and outer rod are connected and limited by a pin that can be detachably passed through the first positioning hole and the second positioning hole thereon; the inner rod of the first telescopic rod is fixedly connected to the top of the base, and the outer rod thereof is fixedly connected to the mounting bracket at the top; the outer rod of the second telescopic rod is fixedly connected to the mounting bracket, and the inner rod thereof is connected to the first connecting member at an end away from the outer rod; the outer rod of the third telescopic rod is fixedly connected to the connecting rod assembly at the upper part, and the lower end of the inner rod thereof is connected to the touch rod.

[0008] Preferably, a main knife pivot shaft is provided on the main knife fixing plate, and the main knife fixing plate is pivotally connected to the main knife connecting seat via the main knife pivot shaft, the main knife is fixed on the main knife connecting seat, and a main knife torsion spring arranged outside the main knife pivot shaft is arranged between the main knife connecting seat and the main knife fixing plate; an auxiliary knife pivot shaft is provided on the auxiliary knife fixing plate, and the auxiliary knife fixing plate is pivotally connected to the auxiliary knife connecting seat via the auxiliary knife pivot shaft, the auxiliary knife is fixed on the auxiliary knife connecting seat, and an auxiliary knife torsion spring arranged outside the auxiliary knife pivot shaft is arranged between the auxiliary knife connecting seat and the auxiliary knife fixing plate.

[0009] Preferably, two sliders are arranged on both sides of the screw motor on the mounting bracket, and both sliders are provided with slider through holes penetrating the upper and lower bottom surfaces of the sliders, and two guide columns correspondingly matched and slidably arranged in the two slider through holes are arranged on the fixing plate.

[0010] Preferably, the second connecting member is a flat connecting member bent downward into an arc-shaped structure.

[0011] The beneficial effects of the present invention are as follows: the present invention utilizes a lead screw motor to drive the extension and retraction of the first telescopic rod to adjust the height of the blade, and meets the requirements of different widths between plants in the horizontal direction according to the extension and retraction of the second telescopic rod, and utilizes a steering motor to adjust the blade to always be parallel to the ground according to different terrains, and the steering motor is controlled according to a horizontal sensor electrically connected to it, and at the same time, the touch rod utilizes a connecting rod assembly to perform parallel reciprocating displacement so that the blade can avoid obstacles such as trees and stones, thereby protecting crops, improving the safety of the blade during use, and facilitating operation. The coordinated use of the main blade and the auxiliary blade further improves the efficiency of weeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of a weeding mechanism according to an embodiment of the present invention;

[0014] Figure 3 is a schematic structural diagram of a connecting rod assembly according to an embodiment of the present invention;

[0015] Parts names and serial numbers in the figure: 1- ground wheel 10- base 2- first telescopic rod 20- mounting bracket 21- inner rod 22- outer rod 23- pin 200- second telescopic rod 201- screw motor 202- fixing plate 203- slider 204- guide column 210- first positioning hole 220- second positioning hole 2030- slider through hole 3- first connecting piece 30- steering motor 31- angular contact ball bearing 4- connecting rod assembly 40- connecting rod 4 1-connecting rod connecting piece 400-connecting rod pivot shaft 410-rotating shaft 411-tension spring 412-stud bolt 5-third telescopic rod 50-touch rod 6-second connecting piece 7-weeding mechanism 70-main knife 71-auxiliary knife 72-main knife fixing plate 73-auxiliary knife fixing plate 710-bending portion 720-main knife pivot shaft 721-main knife connecting seat 722-main knife torsion spring 730-auxiliary knife pivot shaft 731-auxiliary knife connecting seat 732-auxiliary knife torsion spring. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0017] Embodiments of the present invention Figures 1 to 3As shown in the figure, an inter-row weeder includes a ground wheel 1, which is a wheel for facilitating the equipment to walk on the ground. Different numbers of ground wheels can be selected according to different uses. Preferably, two ground wheels 1 are arranged in parallel and spaced apart. The two ground wheels 1 increase the gravity that the ground wheel can withstand and can also keep it moving forward steadily during work. An inverted U-shaped base 10 is pivotally connected to the ground wheel 1. The ground wheel 1 is installed in the U-shaped opening of the base 10, and then it is pivotally connected to the base 10 through a pivot shaft. The ground wheel 1 can rotate in the U-shaped opening of the base 10. The top is provided with a first telescopic rod 2 which can be extended and retracted up and down, that is, the ground wheel 1 is installed at the bottom of the base 10, the first telescopic rod 2 is installed on the top of the base 10 and is perpendicular to the top surface of the base 10, and its extension direction is up and down, and the limit makes it possible to fix its height position after it is extended or retracted to a certain height, so as to keep the adjusted height stable, and the end of the first telescopic rod 2 away from the base 10 is provided with a mounting bracket 20, that is, the two ends of the first telescopic rod 2 correspond to the base 10 and the mounting bracket 20, and the height between the base 10 and the mounting bracket 20 is 1 / 40mm. The distance can be adjusted by extending and retracting the first telescopic rod 2. The mounting bracket 20 is provided with a second telescopic rod 200 whose telescopic direction is perpendicular to that of the first telescopic rod 2 and can be limitedly extended. That is to say, the telescopic direction of the second telescopic rod 200 is horizontal, and its adjusted position in the horizontal direction is also fixed by limiting. The mounting bracket 20 is also provided with a screw motor 201, and a fixing plate 202 is fixedly connected to the output shaft of the screw motor 201. When in use, the fixing plate 202 is used to connect the lawn mower to On a tractor or similar vehicle, the screw motor 201 is powered by an external power source or the vehicle. When the screw motor 201 is started, the fixing plate 202 is fixedly connected to the vehicle, and the two are immovable. The screw motor 201 can move up and down relative to the fixing plate 202, thereby driving the mounting bracket 20 to move up and down, and the mounting bracket 20 drives the first telescopic rod 2 to extend and retract, thus forming a height adjustment structure, which can be used to adjust the height of the blade when working, thereby controlling the depth of the blade eating the soil, and it can also be raised when weeding is not needed;The first connecting member 3 is fixedly connected to the end of the second telescopic rod 200 away from the mounting bracket 20. The first connecting member 3 moves in the horizontal direction away from or close to the mounting bracket 20 under the extension and contraction of the second telescopic rod 200. A steering motor 30 electrically connected to a horizontal sensor is installed on the first connecting member 3. The horizontal sensor can be a gyroscope provided on a vehicle such as a tractor. The control system of the vehicle is electrically connected to the steering motor 30. When the vehicle body equipment forms an angle with the horizontal position, the horizontal sensor sends a command to the central control of the vehicle control system, thereby driving the steering motor 30 to rotate, so that the blade rotates. The steering motor 30 is controlled to be parallel to the ground at the same angle, so that the blade can always be kept parallel to the ground by adjusting the steering motor 30, thereby improving the weeding efficiency. The steering motor 30 is connected to a connecting rod assembly 4 capable of parallel reciprocating displacement by an angular contact ball bearing 31. The connecting rod assembly 4 is provided with a third telescopic rod 5 capable of upper and lower limit telescopic extension on a side away from the mounting bracket 20. The lower end of the third telescopic rod 5 is provided with a feeler rod 50 capable of rotating forward and backward relative to the connecting rod assembly 4. The feeler rod 50 can enable the weeder to avoid the blade in time when it encounters crops, trees or stones, thereby protecting the crops and the blade. It is also protected; the front end of the connecting rod assembly 4 is fixedly connected with a second connecting piece 6, and the second connecting piece 6 is a flat connecting piece bent downward into an arc-shaped structure. The flat structure is convenient for installing the main knife 70 and the auxiliary knife 71 thereon, and enhancing the connection strength between it and the connecting rod assembly 4 and the main and auxiliary knives, thereby improving the service life, and the arc-shaped structure gives it a certain elasticity, which can buffer the force received and improve the structural strength of the product. The end of the second connecting piece 6 away from the connecting rod assembly 4 is fixedly connected with a weeding mechanism 7, so that the connecting rod assembly 4 and it operate synchronously under the transmission of the steering motor 30, and the connecting rod assembly 4 is The second connecting member 6 is driven to turn, and the second connecting member 6 in turn drives the weeding mechanism 7 to turn, which ensures that the weeding mechanism 7 can always remain parallel to the ground. The height can be adjusted and positioned by the lead screw motor 201 according to the ground conditions and vegetation conditions. The width is extended by the second telescopic rod 200 to meet the requirements of different widths between plants in the horizontal direction. When there is no tree, the touch rod 50 extends into the plant. When a tree is encountered, the touch rod 50 moves outward to avoid the tree, which improves the safety of the blade during use and is easy to operate. The coordinated application of the main blade 70 and the auxiliary blade 71 also improves the efficiency of weeding. ;

[0018] Further improvements, such as Figure 1 and Figure 3As shown in the figure, for the connecting rod assembly 4, the connecting rod assembly 4 includes a connecting rod 40 and two connecting rod connecting members 41 correspondingly arranged at both ends of the connecting rod 40. The connecting rod 40 is pivotally connected to the connecting rod connecting member 41 through a connecting rod pivot shaft 400 arranged on the connecting rod connecting member 41. At this time, the connecting rod connecting member 41 can adopt a U-shaped structure connecting member. The two connecting rod connecting members 41 are arranged in a structure with a U-shaped opening facing each other and in a horizontal direction. The connecting rod pivot shaft 400 is arranged on the U of the connecting rod connecting member 41. The connecting rod 40 is pivotally connected to the connecting rod connecting member 41 through the connecting rod pivot shaft 400, that is, the connecting rod 40 can rotate in the horizontal direction relative to the connecting rod connecting member 41, wherein the connecting rod connecting member 41 at the front end of the connecting rod 40 is connected to the second connecting member 6, and the connecting rod connecting member 41 at the rear end of the connecting rod 40 is fixedly connected with a rotating shaft 410, and the rotating shaft 410 is transmission-connected to the steering motor 30 through an angular contact ball bearing 31, that is, the rotating shaft The output shaft of 410 and the steering motor 30 is connected to the inner and outer sides of the angular contact ball bearing 31, one on the inner side and the other on the outer side, and the angular contact ball bearing 31 is used for transmission. When adjusting whether it is parallel to the ground, the connecting rod 40 and the connecting rod connecting piece 41 will be driven and steered by the steering motor 30, and the connecting rod 40 and the connecting rod connecting piece 41 can rotate relative to each other. The third telescopic rod 6 is fixedly connected to the side wall of the connecting rod 40, and the touch rod 50 is fixedly connected to the lower end of the third telescopic rod 6. The third telescopic rod 6 will rotate with the connecting rod 40 relative to the two connecting rod connecting pieces 41, thereby driving the touch rod 50 to rotate toward the weeding mechanism 7. In this way, the touch rod 50 can rotate after touching an obstacle, thereby driving the connecting rod connecting piece 41 located at the front end of the connecting rod 40 to rotate, and then driving the weeding mechanism 7 to rotate, thereby preventing the blade of the weeding mechanism 7 from touching crops or obstacles, avoiding damage to crops by the blade, protecting crops, and improving the safety of the blade.For the rotation of the touch rod 50, a tension spring 411 and a stud 412 are further provided on the top of the two connecting members, and the two ends of the tension spring 411 are correspondingly fixedly connected to the two connecting rod connecting members 41 and are diagonally arranged at the connecting positions on the two connecting rod connecting members 41, and the two ends of the stud 412 are correspondingly pivoted to the two connecting rod connecting members 41 and pivoted on the same side, so that the connecting rod assembly and the tension spring 411 and the stud 412 form a parallel displacement mechanism. When no tree is touched, the parallel displacement mechanism extends between the plants. When a tree is touched, the parallel displacement mechanism moves outward to avoid the tree. The tension spring 411 enables the touch rod 50 to return to its initial state after touching the crops or obstacles and generating a horizontal displacement outward, that is, the tension spring 411 is arranged on the connecting rod connecting member 41 at the tail end of the connecting rod 40 on the side adjacent to the touch rod 50, and is arranged on the connecting rod connecting member 41 at the front end of the connecting rod 40 on the side away from the touch rod 50. The stud bolt 412 is arranged on the side of the connecting rod connecting piece 41 away from the feeler rod 50. In this way, after the feeler rod 50 touches the obstacle, the feeler rod 50 rotates forward, that is, rotates in the direction of the weeding mechanism 7, so that the tension spring 411 is stretched under force, and the stud bolt 412 plays a role in supporting and guiding the rotation direction. After crossing the obstacle, the feeler rod 50 returns to its initial state under the action of the elastic force. The spring obstacle avoidance method solves the problems of traditional hydraulic obstacle avoidance, high cost, large size and inconvenient operation. At the same time, springs of different hardness can be used according to different growth cycles of crops, that is, springs with different elastic forces can be used to protect young crops. The corresponding spring is selected according to the condition of the crop to perform the operation, so as to avoid the young crops from being unable to form a certain thrust on the feeler rod 50 to rotate the feeler rod due to excessive elastic force and unable to protect the young crops. At the same time, the stretch spring 411 can be used to give the blade of the weeding mechanism 7 a certain pulling force to assist in weeding.

[0019] Further improvements, such as Figure 1As shown in the figure, the first telescopic rod 2, the second telescopic rod 200, and the third telescopic rod 5 all include an inner rod 21 and an outer rod 22 movably sleeved outside the inner rod 21, that is, the outer rod 22 can move relative to the inner rod 21, and telescopic movement is formed between the two. Different telescopic rods can select inner and outer rods of different specifications according to the force to be borne during use. Each of the inner rods 21 is provided with a plurality of first positioning holes 210 at intervals along its axial direction, and each of the outer rods 22 is provided with a second positioning hole 220 at one end adjacent to the inner rod 21. The corresponding inner rods 21 and outer rods 22 are connected and limited by pins 23 that can be detachably passed through the first positioning holes 210 and the second positioning holes 220 thereon. When in use, the relative positions of the inner and outer rods are adjusted according to the required height or width. After adjusting to the required height or width, the second positioning hole 220 of the outer rod 22 is aligned with the first positioning hole 210 at the corresponding position on the inner rod 21, and then the pin 23 is inserted into the positioning hole and locked, and the required position is adjusted; at this time, according to the position and function of different telescopic rods in the entire lawn mower structure, the inner rod 21 of the first telescopic rod 2 is fixedly connected to the top of the base 10, and its outer rod 22 is fixedly connected to the mounting bracket 20 at the top; the outer rod 22 of the second telescopic rod 200 is fixedly connected to the mounting bracket 20, and its inner rod 21 is connected to the first connecting member 3 at one end away from the outer rod 22; the outer rod 22 of the third telescopic rod 5 is fixedly connected to the connecting rod assembly 4 at the upper part, and the lower end of the inner rod 21 is connected to the touch rod 50.

[0020] Further improvements, such as Figure 1 and Figure 2As shown in the figure, for the weeding mechanism 7, the weeding mechanism 7 includes a main knife 70 and an auxiliary knife 71, both of which have blades facing the feeler rod 50 and are arranged at an acute angle therebetween, a main knife fixing plate 72 for mounting the main knife 70, and an auxiliary knife fixing plate 73 for mounting the auxiliary knife 71. The main knife 70 and the auxiliary knife 71 can be replaced with blades of different sizes according to the size of the crops and the working environment. The main knife fixing plate 72 and the auxiliary knife fixing plate 73 are installed on the second connecting member 6 at the same height, and the main knife fixing plate 72 is located between the auxiliary knife fixing plate 73 and the feeler rod 50. That is, the main blade 70 is first installed on the main blade fixing plate 72, and then the main blade fixing plate 72 is installed on the second connecting member 6, and the auxiliary blade 71 is also first installed on the auxiliary blade fixing plate 73, and then the auxiliary blade fixing plate 73 is installed on the second connecting member 6. The main and auxiliary blade fixing plates are correspondingly installed on the front and back sides of the second connecting member 6 at the same height. The acute angle structure between the main and auxiliary blades makes it possible for the auxiliary blade 71 to supplement and remove the grass that the main blade 70 has not removed from another direction. At this time, the auxiliary blade fixing plate 73 can be used to set a corresponding angle to achieve the acute angle structure between the main and auxiliary blades. The main blade 70 forms an obtuse angle with the horizontal plane in the direction of the touch rod 50, that is, the blade of the main blade 70 has an oblique angle, and is inserted into the soil in a downward tilt in the forward direction of the weeder, so that the grass can be effectively cut and the weeding efficiency can be improved. The auxiliary knife 71 has a bending portion 710 extending outward and upward at one end away from the auxiliary knife fixing plate 73, which is bent in the direction away from the feeler rod 50, that is, the bending portion 710 and the auxiliary knife 71 form an L-shaped structure, and the bending portion 710 itself is bent backward, which increases the length of the blade and enhances the weeding effect. Both the main knife 70 and the auxiliary knife 71 will be subject to a certain amount of resistance during the weeding process. In order to prevent the blades from being damaged by the force they are subjected to, a main knife pivot shaft 720 is provided on the main knife fixing plate 72. The main knife fixing plate 72 is pivotally connected to a main knife connecting seat 721 through the main knife pivot shaft 720. The main knife 70 is fixed on the main knife connecting seat 721. A main knife torsion spring 722 is provided between the main knife connecting seat 721 and the main knife fixing plate 72 and is sleeved outside the main knife pivot shaft 720. An auxiliary knife pivot shaft 730 is provided, and the auxiliary knife fixing plate 73 is pivotally connected to an auxiliary knife connecting seat 731 through the auxiliary knife pivot shaft 730. The auxiliary knife 71 is fixed on the auxiliary knife connecting seat 731, and an auxiliary knife torsion spring 732 is provided between the auxiliary knife connecting seat 731 and the auxiliary knife fixing plate 73 and is sleeved on the auxiliary knife pivot shaft 730. In this way, when the main and auxiliary knives are subjected to a large force, they will rotate relative to their respective fixing plates, and the torsion spring will also buffer the force applied to them, thereby avoiding the problem of damage to the blade caused by hard collision.

[0021] Further improvements, such as Figure 1As shown in the figure, two sliders 203 are arranged on both sides of the screw motor 201 on the mounting bracket 20, and the two sliders 203 are both provided with slider through holes 2030 penetrating the upper and lower bottom surfaces of the sliders 203. The fixing plate 202 is provided with two guide columns 204 correspondingly matched and slidably arranged in the two slider through holes 2030. The setting of the guide columns 204 and the sliders 203 limits the direction in which the mounting bracket 20 moves up and down after being driven by the screw motor 201, thereby ensuring the smoothness of the height adjustment.

[0022] It should be understood that those skilled in the art may make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A weeder between rows, characterized in that : It includes a ground wheel, an inverted U-shaped base is pivotally connected to the ground wheel, a first telescopic rod capable of limited upward and downward extension is arranged on the top of the base, a mounting bracket is arranged on the end of the first telescopic rod away from the base, a second telescopic rod whose extension direction is perpendicular to the extension direction of the first telescopic rod and can be limitedly extended is installed on the mounting bracket, a screw motor is also installed on the mounting bracket, a fixing plate is fixedly connected to the output shaft of the screw motor; a first connecting piece is fixedly connected to the end of the second telescopic rod away from the mounting bracket, a steering motor electrically connected to a horizontal sensor is installed on the first connecting piece, the steering motor is connected to a connecting rod assembly capable of parallel reciprocating displacement by an angular contact ball bearing transmission, and the connecting rod assembly is provided with a The third telescopic rod can be telescopically extended and retracted up and down, and the lower end of the third telescopic rod is provided with a feeler rod that can rotate forward and backward relative to the connecting rod assembly; the front end of the connecting rod assembly is fixedly connected to a second connecting piece, and the end of the second connecting piece away from the connecting rod assembly is fixedly connected to a weeding mechanism; the weeding mechanism includes a main knife and an auxiliary knife with their blades both facing the feeler rod and arranged at an acute angle therebetween, a main knife fixing plate for mounting the main knife, and an auxiliary knife fixing plate for mounting the auxiliary knife, the main knife fixing plate and the auxiliary knife fixing plate are mounted on the second connecting piece at the same height, and the main knife fixing plate is located between the auxiliary knife fixing plate and the feeler rod; the main knife forms an obtuse angle with the horizontal plane in the direction of the feeler rod; the auxiliary knife extends outward and upward at the end away from the auxiliary knife fixing plate, and is bent in the direction away from the feeler rod.

2. The inter-row weeder according to claim 1, characterized in that : The connecting rod assembly includes a connecting rod and two connecting rod connectors correspondingly arranged at both ends of the connecting rod, the connecting rod is pivotally connected to the connecting rod connector through a connecting rod pivot shaft arranged on the connecting rod connector, wherein the connecting rod connector at the front end of the connecting rod is connected to the second connecting member, and the connecting rod connector at the rear end of the connecting rod is fixedly connected to a rotating shaft, and the rotating shaft is transmission-connected to the steering motor through an angular contact ball bearing, the third telescopic rod is fixedly connected to the side wall of the connecting rod, and the touch rod is fixedly connected to the lower end of the third telescopic rod.

3. The inter-row weeder according to claim 2, characterized in that : A tension spring and a stud are also provided on the top of the two connecting rod connectors. The two ends of the tension spring are correspondingly fixedly connected to the two connecting rod connectors and the connecting positions on the two connecting rod connectors are diagonally arranged. The two ends of the stud are correspondingly pivoted to the two connecting rod connectors and are pivoted on the same side.

4. The inter-row weeder according to claim 1, characterized in that : The first telescopic rod, the second telescopic rod, and the third telescopic rod all include an inner rod and an outer rod movably sleeved outside the inner rod, each of the inner rods is provided with a plurality of first positioning holes along its axial direction, and each of the outer rods is provided with a second positioning hole at an end adjacent to the inner rod, and the corresponding inner rods and outer rods are connected and limited by a pin that can be detachably passed through the first positioning hole and the second positioning hole thereon; the inner rod of the first telescopic rod is fixedly connected to the top of the base, and its outer rod is fixedly connected to the mounting bracket at the top; the outer rod of the second telescopic rod is fixedly connected to the mounting bracket, and its inner rod is connected to the first connecting member at an end away from the outer rod; the outer rod of the third telescopic rod is fixedly connected to the connecting rod assembly at the upper part, and the lower end of the inner rod is connected to the touch rod.

5. The inter-row weeder according to claim 1, characterized in that : A main knife pivot shaft is arranged on the main knife fixing plate, and the main knife fixing plate is pivotally connected to the main knife connecting seat through the main knife pivot shaft, the main knife is fixed on the main knife connecting seat, and a main knife torsion spring arranged outside the main knife pivot shaft is arranged between the main knife connecting seat and the main knife fixing plate; an auxiliary knife pivot shaft is arranged on the auxiliary knife fixing plate, and the auxiliary knife fixing plate is pivotally connected to the auxiliary knife connecting seat through the auxiliary knife pivot shaft, the auxiliary knife is fixed on the auxiliary knife connecting seat, and an auxiliary knife torsion spring arranged outside the auxiliary knife pivot shaft is arranged between the auxiliary knife connecting seat and the auxiliary knife fixing plate.

6. The inter-row weeder according to claim 1, characterized in that : Two sliders are arranged on both sides of the screw motor on the mounting bracket, and both sliders are provided with slider through holes penetrating the upper and lower bottom surfaces of the sliders. Two guide columns correspondingly matched and slidably arranged in the two slider through holes are arranged on the fixing plate.

7. The inter-row weeder according to claim 1, characterized in that : The second connecting piece is a flat connecting piece bent downward into an arc-shaped structure.

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