Automatic green Chinese onion harvester

Abstract

An automatic green Chinese onion harvester relates to the technical field of agricultural harvesting. The utility model relates to a green Chinese onion harvester, and aims to solve the problems that the working efficiency is low due to the fact that an existing green Chinese onion harvesting mode generally adopts manual work and farmers use simple tools to harvest along roots and stems of green Chinese onions, the appearance of the green Chinese onions is damaged sometimes during manual harvesting, and then serious economic loss is caused. A green onion clamping driving unit 2 and a mechanical arm clamping unit 3 are sequentially arranged at one end of the upper surface of the movable frame 1 in the width direction, a central controller 7 is arranged in the middle of one end of the upper surface of the movable frame 1, and a first-stage conveying belt 5 and a second-stage conveying belt 4 are sequentially arranged in the middle of the upper surface of the movable frame 1 in the width direction. The first-stage conveying belt 5 is higher than the second-stage conveying belt 4, the first-stage conveying belt 5 and the second-stage conveying belt 4 are arranged in a staggered mode, and a box storage bin 6 is arranged at the other end of the upper surface of the movable frame 1. The harvester is suitable for the technical field of agricultural green Chinese onion harvesting.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural harvesting, in particular to an automatic green onion harvester. Background Art

[0002] At present, in my country, green onions are a common agricultural product in the diet and have a wide market demand. Therefore, harvesting green onions has become a common agricultural activity. The cultivation of green onions generally requires multiple production links such as seedling cultivation, transplanting and planting, field management and harvesting. Harvesting is the last link, but it is also the most critical one. On the one hand, the labor invested in harvesting accounts for a large part of the entire production process; on the other hand, the quality of the harvest will directly affect the final price of green onions.

[0003] However, the level of harvesting operations in China is relatively backward. In many rural areas, manual harvesting is still the main method of harvesting. Farmers use simple tools such as sickles and cutters to harvest along the base of the rhizomes of green onions. This method of harvesting takes a long time and has high labor costs. Taking Zhangqiu green onions as an example, the current mechanized harvesting area is less than 1%, and the low level of automation has become a bottleneck restricting the development of the green onion industry.

[0004] In summary, the existing method of harvesting green onions is generally manual. Farmers use simple tools to harvest along the base of the rhizomes of green onions, which results in low work efficiency. In addition, manual harvesting sometimes causes the appearance of the green onions to be damaged, leading to serious economic losses. Utility Model Content

[0005] The utility model proposes an automatic green onion harvester to solve the problem that the existing method of harvesting green onions is generally manual, and farmers harvest along the base of the rhizome of the green onions by using simple tools, which leads to low work efficiency and manual harvesting sometimes causes the appearance of the green onions to be damaged, thus causing serious economic losses.

[0006] The utility model discloses an automatic green onion harvester, the specific structure of which includes a movable frame 1, a green onion clamping driving unit 2, a mechanical arm clamping unit 3, a secondary conveyor belt 4, a primary conveyor belt 5, a box bin 6 and a central controller 7;

[0007] An onion clamping driving unit 2 and a mechanical arm clamping unit 3 are sequentially arranged at one end of the upper surface of the mobile frame 1 along the width direction, a central controller 7 is arranged in the middle of one end of the upper surface of the mobile frame 1, a primary conveyor belt 5 and a secondary conveyor belt 4 are sequentially arranged in the middle of the upper surface of the mobile frame 1 along the width direction, and the height of the primary conveyor belt 5 is higher than the secondary conveyor belt 4, the primary conveyor belt 5 and the secondary conveyor belt 4 are staggered, and a box bin 6 is arranged at the other end of the upper surface of the mobile frame 1;

[0008] Furthermore, the onion clamping driving unit 2 includes a bracket 2-1, a driving motor 2-2, a driving pulley 2-3, a belt 2-4, a driven pulley 2-5 and a connecting block 2-6;

[0009] The bracket 2-1 is symmetrically arranged in parallel with a pair of connecting blocks 2-6. A rotating shaft is arranged at the top of each connecting block 2-6, and a driven pulley 2-5 is arranged on the rotating shaft. Two driving motors 2-2 are evenly arranged at the top of the bracket 2-1 along the length direction, and a driving pulley 2-3 is arranged at the output end of each driving motor 2-2. The driving pulley 2-3 is connected to the corresponding driven pulley 2-5 through a belt 2-4.

[0010] Furthermore, two L-shaped connecting blocks are provided at one end of the lower surface of the mobile frame 1, and the ends of the L-shaped connecting blocks are fixedly connected to the connecting blocks 2-6 in the onion clamping drive unit 2;

[0011] Furthermore, the height of the connecting block 2-6 is less than the height of the bracket 2-1;

[0012] Furthermore, the bottom edges of the two belts 2-4 in the onion clamping drive unit 2 form an angle of 45° to 60° with the horizontal line;

[0013] Furthermore, a tension wheel assembly is provided on the upper surface of the mobile frame 1, and the tension wheel assembly is cooperatively connected with one of the belts 2-4;

[0014] Further, the robot arm clamping unit 3 includes a No. 1 motor 3-1, a worm 3-2, a gantry 3-3, a height adjustment screw 3-4, an L-shaped limit block 3-5, a reducer 3-6, a No. 2 motor 3-7, a telescopic adjustment screw 3-8, a height adjustment nut slider 3-9, a telescopic adjustment nut slider 3-10, a screw support 3-11, a square limit sleeve 3-12, a telescopic rod 3-13, a clamping claw 3-14 and a worm gear 3-15;

[0015] The output end of the No. 1 motor 3-1 is connected to one end of the worm 3-2, a worm wheel 3-15 is provided on the upper surface of the mobile frame 1, and the worm wheel 3-15 is rotatably connected to the upper surface of the mobile frame 1 through a rotating shaft, the worm wheel 3-15 is meshed with the worm 3-2, a gantry 3-3 is provided on the upper end face of the worm wheel 3-15, a height adjustment screw 3-4 is provided inside the gantry 3-3 along the height direction, the height adjustment screw 3-4 is rotatably connected to the gantry 3-3, and a No. 3 motor is provided at the top of the gantry 3-3, the output end of the No. 3 motor passes through the gantry 3-3 and is fixedly connected to the top of the height adjustment screw 3-4, a height adjustment nut slider 3-9 is provided on the height adjustment screw 3-4, and a support is provided on the front of the height adjustment nut slider 3-9 A support plate, a reducer 3-6 is provided at one end of the upper surface of the support plate, the power input end of the reducer 3-6 is connected to the output end of the second motor 3-7, the power output end of the reducer 3-6 is connected to one end of the telescopic adjustment screw 3-8, a screw support 3-11 is provided at the other end of the upper surface of the support plate, the other end of the telescopic adjustment screw 3-8 is rotatably connected to the screw support 3-11, a telescopic adjustment nut slider 3-10 is provided on the telescopic adjustment screw 3-8, a telescopic rod 3-13 is provided on the telescopic adjustment nut slider 3-10, an L-shaped limit block 3-5 is provided on the lower surface of one end of the support plate, a square limit sleeve 3-12 is provided at the other end of the support plate, and the end of the telescopic rod 3-13 passes through the square limit sleeve 3-12 and is connected to the clamp 3-14;

[0016] Furthermore, the telescopic rod 3-13 is slidably connected to the inner wall of the L-shaped limit block 3-5 and the square limit sleeve 3-12;

[0017] Furthermore, the first motor 3-1 is fixedly connected to the upper surface of the mobile frame 1 through a motor seat, and the wheel set of the mobile frame 1 adopts a Mecanum wheel;

[0018] Furthermore, the box storage bin 6 is an L-shaped bin with an open top, and the vertical section of the box storage bin 6 has a slope;

[0019] Furthermore, the central controller 7 is used to uniformly control the motors in the onion clamping drive unit 2, the robot arm clamping unit 3, the secondary conveyor belt 4 and the primary conveyor belt 5;

[0020] Furthermore, when in use, the harvester is moved to the green onion planting area, and it is ensured that the position of the machine is appropriate. The harvester should harvest along one side of the green onion planting row, and it is ensured that there are no obstacles on the harvesting route; the harvester is started, and necessary preheating and system checks are carried out to ensure that all functions are operating normally before the operation can be started; the mechanical arm clamping unit 3 on the mobile frame 1 is used to clamp the box inside the box bin 6 by adjusting the position of the clamping claws 3-14 in the mechanical arm clamping unit 3, and the box is placed on the secondary conveyor belt 4 by using the mechanical arm clamping unit 3. At this time, the central controller 7 controls the drive motor 2-2 in the green onion clamping drive unit 2 to start, thereby driving the two belts in the green onion clamping drive unit 2 to rotate, and the harvester moves along the green onion row, and the harvester starts to move, clamps the green onions through the two belts in the green onion clamping drive unit 2, and lifts them up, and gradually harvests all the green onions; the lifted green onions are driven by the green onion clamping drive unit 2 to The onions are lifted up, pulled out of the soil, and transferred upward to the primary conveyor belt 5 on the vehicle; a primary conveyor belt 5 and a secondary conveyor belt 4 are arranged in sequence along the width direction in the middle of the upper surface of the mobile frame 1, and the height of the primary conveyor belt 5 is higher than the secondary conveyor belt 4, and the primary conveyor belt 5 and the secondary conveyor belt 4 are staggered, and the harvested green onions are transferred from the primary conveyor belt 5 to the inside of the box on the secondary conveyor belt 4; the secondary conveyor belt 4 is controlled to reciprocate by the central controller 7, so that the green onions cover the bottom surface of the box, and it is ensured that two layers of green onions are placed inside each box. When the box is full, the onion clamping drive unit 2, the primary conveyor belt 5 and the secondary conveyor belt 4 are braked, and the full box is placed inside the box bin 6 by the mechanical arm clamping unit 3, and then another empty box is clamped and placed on the secondary conveyor belt 4, and the harvester starts to move again, and the above process is repeated. After the harvesting is completed, the machine moves to the designated area and stops, and all work is completed.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model overcomes the shortcomings of the prior art, adopts a central controller to control the start of a driving motor in an onion clamping driving unit, thereby driving two belts in the onion clamping driving unit to rotate, and the harvester moves along the onion row, and the harvester starts to move, clamps the onions through the two belts in the onion clamping driving unit, and lifts them, and gradually harvests all the onions; this method realizes uprooting the onions, and abandons cutting the root base of the onions during harvesting, thereby effectively avoiding the phenomenon of damage to the appearance of the onions, thereby avoiding economic losses;

[0023] The lifted green onions are lifted up by the onion clamping driving unit, pulled out of the soil, and transferred upward to the primary conveyor belt on the vehicle; a primary conveyor belt and a secondary conveyor belt are sequentially arranged along the width direction on the middle part of the upper surface of the mobile frame, and the height of the primary conveyor belt is higher than the secondary conveyor belt, and the primary conveyor belt and the secondary conveyor belt are staggered to transfer the harvested green onions from the primary conveyor belt to the inside of the box on the secondary conveyor belt; the central controller is used to control the reciprocating motion of the secondary conveyor belt, so that the green onions cover the bottom surface of the box, and ensure that two layers of green onions are placed inside each box; the use of this device does not require manual operation from harvesting to boxing, which greatly saves harvesting time and improves harvesting work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of an automatic green onion harvester described in the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of an onion clamping drive unit in an automatic onion harvester described in the utility model;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of a mechanical arm clamping unit in an automatic green onion harvester described in the utility model. DETAILED DESCRIPTION

[0027] Specific implementation method 1: Combination Figure 1 The automatic green onion harvester described in this embodiment includes a movable frame 1, a green onion clamping driving unit 2, a mechanical arm clamping unit 3, a secondary conveyor belt 4, a primary conveyor belt 5, a box bin 6 and a central controller 7;

[0028] An onion clamping driving unit 2 and a mechanical arm clamping unit 3 are sequentially arranged at one end of the upper surface of the mobile frame 1 along the width direction, a central controller 7 is arranged in the middle of one end of the upper surface of the mobile frame 1, a primary conveyor belt 5 and a secondary conveyor belt 4 are sequentially arranged in the middle of the upper surface of the mobile frame 1 along the width direction, and the height of the primary conveyor belt 5 is higher than the secondary conveyor belt 4, the primary conveyor belt 5 and the secondary conveyor belt 4 are staggered, and a box bin 6 is arranged at the other end of the upper surface of the mobile frame 1;

[0029] In the present specific embodiment, when in use, the harvester is moved to the green onion planting area and ensures that the position of the machine is appropriate. The harvester should harvest along one side of the green onion planting row and ensure that there are no obstacles on the harvesting route; the harvester is started and necessary preheating and system checks are carried out to ensure that all functions are operating normally before operation can begin; the mechanical arm clamping unit 3 on the mobile frame 1 is used to clamp the box inside the box bin 6 by adjusting the position of the clamping claws 3-14 in the mechanical arm clamping unit 3, and the box is placed on the secondary conveyor belt 4 by the mechanical arm clamping unit 3, at this time, the driving motor 2-2 in the green onion clamping drive unit 2 is controlled by the central controller 7 to start, thereby driving the two belts in the green onion clamping drive unit 2 to rotate, and the harvester moves along the green onion row, and the harvester starts to move, clamps the green onions through the two belts in the green onion clamping drive unit 2, and lifts them up, and gradually harvests all the green onions; the lifted green onions are clamped by the green onion clamping drive unit 2 is lifted up, pulled out of the soil, and transferred upward to the primary conveyor belt 5 on the vehicle; a primary conveyor belt 5 and a secondary conveyor belt 4 are sequentially arranged along the width direction in the middle of the upper surface of the mobile frame 1, and the height of the primary conveyor belt 5 is higher than the secondary conveyor belt 4, and the primary conveyor belt 5 and the secondary conveyor belt 4 are staggered, and the harvested green onions are transferred from the primary conveyor belt 5 to the inside of the box on the secondary conveyor belt 4; the secondary conveyor belt 4 is controlled to reciprocate by the central controller 7, so that the green onions cover the bottom surface of the box, and it is ensured that two layers of green onions are placed inside each box. When the box is full, the onion clamping drive unit 2, the primary conveyor belt 5 and the secondary conveyor belt 4 are braked, and the full box is placed inside the box bin 6 by the mechanical arm clamping unit 3, and then another empty box is clamped and placed on the secondary conveyor belt 4, and the harvester starts to move again, and the above process is repeated. After the harvesting is completed, the machine moves to the designated area and stops, and all work is completed.

[0030] Specific implementation method 2: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the harvester described in the specific embodiment 1. In the automatic green onion harvester described in this embodiment, the green onion clamping drive unit 2 includes a bracket 2-1, a drive motor 2-2, a drive pulley 2-3, a belt 2-4, a driven pulley 2-5 and a connecting block 2-6;

[0031] The bracket 2-1 is symmetrically arranged in parallel with a pair of connecting blocks 2-6. A rotating shaft is arranged at the top of each connecting block 2-6, and a driven pulley 2-5 is arranged on the rotating shaft. Two driving motors 2-2 are evenly arranged at the top of the bracket 2-1 along the length direction, and a driving pulley 2-3 is arranged at the output end of each driving motor 2-2. The driving pulley 2-3 is connected to the corresponding driven pulley 2-5 through a belt 2-4.

[0032] In this specific embodiment, two driving motors 2-2 are used to drive two belts 2-4 to rotate continuously, and the rotation directions of the two belts 2-4 are opposite, so that the gap between the two belts 2-4 can be used to clamp the green onions, and the bottom edges of the two belts 2-4 in the green onion clamping driving unit 2 form an angle of 45° to 60° with the horizontal line. In fact, the two belts 2-4 have a certain inclination, and the inclination is the same, so that the roots of the green onions can be pulled out of the soil.

[0033] Specific implementation method three: Combination Figure 1 To explain this embodiment, this embodiment is a further limitation of the harvester described in the second specific embodiment. In this embodiment, an automatic green onion harvester is described, in which two L-shaped connecting blocks are provided at one end of the lower surface of the mobile frame 1, and the end of the L-shaped connecting block is fixedly connected to the connecting block 2-6 in the green onion clamping drive unit 2.

[0034] Specific implementation method four: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the harvester described in the second embodiment. In this embodiment, an automatic green onion harvester is described, and the height of the connecting block 2-6 is less than the height of the bracket 2-1.

[0035] Specific implementation method five: Combination Figure 1 To explain this embodiment, this embodiment is a further limitation of the harvester described in the second specific embodiment. In the automatic green onion harvester described in this embodiment, the bottom edges of the two belts 2-4 in the green onion clamping drive unit 2 form an angle of 45° to 60° with the horizontal line.

[0036] Specific implementation method six: Combination Figure 1 The present embodiment is described as a further limitation of the harvester described in the second specific embodiment. The present embodiment is an automatic green onion harvester, wherein the upper surface of the mobile frame 1 is provided with a tensioning wheel assembly, and the tensioning wheel assembly is connected with one of the belts 2-4.

[0037] Specific implementation method seven: Combination Figure 1 Description of this embodiment, this embodiment is a further limitation of the harvester described in the specific embodiment 1, an automatic green onion harvester described in this embodiment, the mechanical arm clamping unit 3 includes a No. 1 motor 3-1, a worm 3-2, a gantry 3-3, a height adjustment screw 3-4, an L-shaped limit block 3-5, a reducer 3-6, a No. 2 motor 3-7, a telescopic adjustment screw 3-8, a height adjustment nut slider 3-9, a telescopic adjustment nut slider 3-10, a screw support 3-11, a square limit sleeve 3-12, a telescopic rod 3-13, a clamping claw 3-14 and a worm gear 3-15;

[0038] The output end of the No. 1 motor 3-1 is connected to one end of the worm 3-2, a worm wheel 3-15 is provided on the upper surface of the mobile frame 1, and the worm wheel 3-15 is rotatably connected to the upper surface of the mobile frame 1 through a rotating shaft, the worm wheel 3-15 is meshed with the worm 3-2, a gantry 3-3 is provided on the upper end face of the worm wheel 3-15, a height adjustment screw 3-4 is provided inside the gantry 3-3 along the height direction, the height adjustment screw 3-4 is rotatably connected to the gantry 3-3, and a No. 3 motor is provided at the top of the gantry 3-3, the output end of the No. 3 motor passes through the gantry 3-3 and is fixedly connected to the top of the height adjustment screw 3-4, a height adjustment nut slider 3-9 is provided on the height adjustment screw 3-4, and a support is provided on the front of the height adjustment nut slider 3-9 A support plate, a reducer 3-6 is provided at one end of the upper surface of the support plate, the power input end of the reducer 3-6 is connected to the output end of the second motor 3-7, the power output end of the reducer 3-6 is connected to one end of the telescopic adjustment screw 3-8, a screw support 3-11 is provided at the other end of the upper surface of the support plate, the other end of the telescopic adjustment screw 3-8 is rotatably connected to the screw support 3-11, a telescopic adjustment nut slider 3-10 is provided on the telescopic adjustment screw 3-8, a telescopic rod 3-13 is provided on the telescopic adjustment nut slider 3-10, an L-shaped limit block 3-5 is provided on the lower surface of one end of the support plate, a square limit sleeve 3-12 is provided at the other end of the support plate, and the end of the telescopic rod 3-13 passes through the square limit sleeve 3-12 and is connected to the clamp 3-14;

[0039] In this specific embodiment, the No. 3 motor is used to drive the height adjustment screw 3-4 to rotate, so that the height adjustment nut slider 3-9 moves up and down along the height adjustment screw 3-4, thereby adjusting the height of the clamp 3-14, and then the No. 2 motor 3-7 is used to drive the telescopic adjustment screw 3-8 to rotate, so that the telescopic adjustment nut slider 3-10 moves horizontally along the telescopic adjustment screw 3-8, thereby adjusting the horizontal position of the clamp 3-14, and finally the No. 1 motor 3-1 is used to drive the worm gear structure to operate, so that the worm gear drives the gantry 3-3 to rotate circumferentially, thereby causing the clamp 3-14 to rotate circumferentially; this method makes it easy to quickly clamp the boxes in the box bin 6 through the clamp 3-14 and clamp them onto the secondary conveyor belt 4.

[0040] Specific implementation method eight: Combination Figure 1 To explain this embodiment, this embodiment is a further limitation of the harvester described in the specific embodiment seven. In this embodiment, an automatic green onion harvester is described, wherein the telescopic rod 3-13 is slidably connected with the inner wall of the L-shaped limit block 3-5 and the square limit sleeve 3-12.

[0041] Specific implementation method nine: Combination Figure 1The present embodiment is described as a further limitation of the harvester described in the seventh embodiment. The present embodiment is an automatic green onion harvester, wherein the No. 1 motor 3-1 is fixedly connected to the upper surface of the mobile frame 1 through a motor seat, and the wheel set of the mobile frame 1 adopts a Mecanum wheel.

[0042] Specific implementation method ten: Combination Figure 1 This embodiment is described. This embodiment is a further limitation of the harvester described in the specific embodiment 1. In this embodiment, an automatic green onion harvester is described. The box bin 6 is an L-shaped bin with an open top, and the vertical section of the box bin 6 has a slope.

[0043] In this specific implementation, the box bin 6 is an L-shaped bin with an open top, and the vertical section of the box bin 6 has a slope, so that after the clamps 3-14 move the boxes in the horizontal section of the box bin 6, the boxes on the slope of the box bin 6 can be moved downward by utilizing the slope of the vertical section of the box bin 6, thereby replenishing the number of boxes in the horizontal section of the box bin 6.

[0044] Specific implementation method eleven: Combination Figure 1 The present embodiment is described as a further limitation of the harvester described in the second or seventh specific embodiment. The present embodiment describes an automatic green onion harvester, wherein the central controller 7 is used to uniformly control the motors in the green onion clamping drive unit 2, the mechanical arm clamping unit 3, the secondary conveyor belt 4 and the primary conveyor belt 5; the central controller 7 adopts a micro Siemens PLC controller.

[0045] How it works

[0046] When in use, move the harvester to the green onion planting area and ensure that the position of the machine is appropriate. The harvester should harvest along one side of the green onion planting row and ensure that there are no obstacles on the harvesting route; start the harvester, and perform necessary preheating and system checks to ensure that all functions are operating normally before starting the operation; use the mechanical arm clamping unit 3 on the mobile frame 1 to clamp the box inside the box bin 6 by adjusting the position of the clamping claws 3-14 in the mechanical arm clamping unit 3, and use the mechanical arm clamping unit 3 to place the box on the secondary conveyor belt 4. At this time, the central controller 7 controls the drive motor 2-2 in the green onion clamping drive unit 2 to start, thereby driving the two belts in the green onion clamping drive unit 2 to rotate, and the harvester moves along the green onion row. The harvester starts to move, clamps the green onions through the two belts in the green onion clamping drive unit 2, and lifts them up, gradually harvesting all the green onions; the lifted green onions are lifted upward by the green onion clamping drive unit 2 The harvested green onions are pulled out of the soil and transferred upward to the primary conveyor belt 5 on the vehicle; a primary conveyor belt 5 and a secondary conveyor belt 4 are sequentially arranged in the middle of the upper surface of the mobile frame 1 along the width direction, and the height of the primary conveyor belt 5 is higher than the secondary conveyor belt 4, and the primary conveyor belt 5 and the secondary conveyor belt 4 are staggered to transfer the harvested green onions from the primary conveyor belt 5 to the inside of the box on the secondary conveyor belt 4; the central controller 7 is used to control the reciprocating motion of the secondary conveyor belt 4, so that the green onions cover the bottom surface of the box, and ensure that two layers of green onions are placed inside each box. When the box is full, the onion clamping drive unit 2, the primary conveyor belt 5 and the secondary conveyor belt 4 are braked, and the full box is placed inside the box bin 6 by the mechanical arm clamping unit 3, and then another empty box is clamped and placed on the secondary conveyor belt 4, and the harvester starts to move again, and the above process is repeated. After the harvesting is completed, the machine moves to the designated area and stops, and all work is completed.

Claims

1. An automatic green onion harvester, characterized in that: It comprises a movable frame (1), an onion clamping driving unit (2), a mechanical arm clamping unit (3), a secondary conveyor belt (4), a primary conveyor belt (5), a box storage bin (6) and a central controller (7); One end of the upper surface of the mobile frame (1) is provided with an onion clamping drive unit (2) and a mechanical arm clamping unit (3) in sequence along the width direction, a central controller (7) is provided in the middle of one end of the upper surface of the mobile frame (1), a primary conveyor belt (5) and a secondary conveyor belt (4) are provided in sequence along the width direction in the middle of the upper surface of the mobile frame (1), and the height of the primary conveyor belt (5) is higher than that of the secondary conveyor belt (4), and the primary conveyor belt (5) and the secondary conveyor belt (4) are staggered, and a box storage bin (6) is provided at the other end of the upper surface of the mobile frame (1).

2. The automatic green onion harvester according to claim 1, characterized in that: The onion clamping driving unit (2) comprises a bracket (2-1), a driving motor (2-2), a driving pulley (2-3), a belt (2-4), a driven pulley (2-5) and a connecting block (2-6); The bracket (2-1) is symmetrically arranged in parallel with a pair of connecting blocks (2-6); a rotating shaft is arranged at the top of each connecting block (2-6), and a driven pulley (2-5) is arranged on the rotating shaft; two driving motors (2-2) are evenly arranged at the top of the bracket (2-1) along the length direction; a driving pulley (2-3) is arranged at the output end of each driving motor (2-2); and the driving pulley (2-3) is connected to the corresponding driven pulley (2-5) through a belt (2-4).

3. The automatic green onion harvester according to claim 2, characterized in that: Two L-shaped connection blocks are provided at one end of the lower surface of the mobile frame (1), and the ends of the L-shaped connection blocks are fixedly connected to the connection blocks (2-6) in the onion clamping drive unit (2).

4. The automatic green onion harvester according to claim 2, characterized in that: The height of the connecting block (2-6) is smaller than the height of the bracket (2-1).

5. The automatic green onion harvester according to claim 2, characterized in that: The bottom edges of the two belts (2-4) in the onion clamping drive unit (2) form an angle of 45° to 60° with the horizontal line.

6. The automatic green onion harvester according to claim 2, characterized in that: The upper surface of the mobile frame (1) is provided with a tension wheel assembly, and the tension wheel assembly is cooperatively connected with one of the belts (2-4).

7. The automatic green onion harvester according to claim 1, characterized in that: The mechanical arm clamping unit (3) comprises a first motor (3-1), a worm (3-2), a gantry (3-3), a height adjustment screw (3-4), an L-shaped limit block (3-5), a reducer (3-6), a second motor (3-7), a telescopic adjustment screw (3-8), a height adjustment nut slider (3-9), a telescopic adjustment nut slider (3-10), a screw support (3-11), a square limit sleeve (3-12), a telescopic rod (3-13), a clamping claw (3-14) and a worm gear (3-15); The output end of the No. 1 motor (3-1) is connected to one end of the worm (3-2); a worm wheel (3-15) is provided on the upper surface of the mobile frame (1); the worm wheel (3-15) is rotatably connected to the upper surface of the mobile frame (1) via a rotating shaft; the worm wheel (3-15) is meshedly connected to the worm (3-2); a gantry (3-3) is provided on the upper end surface of the worm wheel (3-15); a height adjustment screw (3-4) is provided inside the gantry (3-3) along the height direction; the height adjustment screw (3-4) is rotatably connected to the gantry (3-3); a No. 3 motor is provided at the top of the gantry (3-3); the output end of the No. 3 motor passes through the gantry (3-3) and is fixedly connected to the top of the height adjustment screw (3-4); a height adjustment nut slider (3-9) is provided on the height adjustment screw (3-4); a height adjustment nut slider (3-9) is provided on the front side of the height adjustment nut slider (3-9) A support plate, wherein a reducer (3-6) is provided at one end of the upper surface of the support plate, the power input end of the reducer (3-6) is connected to the output end of the second motor (3-7), the power output end of the reducer (3-6) is connected to one end of a telescopic adjustment screw (3-8), a screw support (3-11) is provided at the other end of the upper surface of the support plate, the other end of the telescopic adjustment screw (3-8) is rotatably connected to the screw support (3-11), a telescopic adjustment nut slider (3-10) is provided on the telescopic adjustment screw (3-8), a telescopic rod (3-13) is provided on the telescopic adjustment nut slider (3-10), an L-shaped limit block (3-5) is provided on the lower surface of one end of the support plate, a square limit sleeve (3-12) is provided at the other end of the support plate, and the end of the telescopic rod (3-13) passes through the square limit sleeve (3-12) and is connected to the clamp (3-14).

8. The automatic green onion harvester according to claim 7, characterized in that: The telescopic rod (3-13) is slidably connected to the inner wall of the L-shaped limiting block (3-5) and the square limiting sleeve (3-12).

9. The automatic green onion harvester according to claim 7, characterized in that: The first motor (3-1) is fixedly connected to the upper surface of the mobile frame (1) via a motor seat, and the wheel set of the mobile frame (1) adopts Mecanum wheels.

10. The automatic green onion harvester according to claim 1, characterized in that: The box storage bin (6) is an L-shaped bin with an open top, and the vertical section of the box storage bin (6) has a slope.

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