Mung bean picking device

By using hot air or electric heating rods to induce mature mung bean pods to burst open and collecting the mung beans using a receiving tray, the problems of plant damage and labor waste in existing technologies are solved, achieving efficient and automated harvesting of mung beans at low cost.

CN120917985APending Publication Date: 2025-11-11SHANXI JINPO AGRI DEV CO LTD
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Patent Information

Application Number
CN202510994922.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-18
Publication Date
2025-11-11

AI Technical Summary

Technical Problem

Existing automated mung bean harvesting technology is efficient but damages the plants and cannot distinguish between pods at different stages of maturity, resulting in waste and increased labor requirements.

Method used

Design a mung bean harvesting device that uses hot air or electric heating rods to cause mature bean pods to burst open, and combines a receiving tray and buffer micro-columns to collect the mung beans, avoiding damage to the plants and achieving automated harvesting.

Benefits of technology

It enables automated harvesting of mung beans, reduces labor burden, protects the plant's ability to mature in multiple crops, avoids the impact of immature pods, reduces impurities, and improves harvesting efficiency and cost-effectiveness.

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Abstract

The invention provides a mung bean picking device. The mung bean picking device comprises a walking vehicle; the base is arranged on the walking vehicle, and an air heater, a hot air header pipe extending out of the base and transversely extending, a hot air vertical pipe extending out of the hot air header pipe and vertically extending, and a hot air transverse pipe extending out of the hot air vertical pipe and transversely extending are arranged in the base; and the receiving disc is arranged at the tail end of the hot air vertical pipe. The invention further provides a mung bean picking device. The mung bean picking device comprises a walking vehicle; the transverse beam extends out of the base and transversely extends, the vertical frame extends out of the transverse beam and vertically extends, and the transverse branch extends out of the vertical frame and transversely extends out of the vertical frame. The bearing disc is arranged at the tail end of the vertical frame; and the plurality of electric heating rods are fixed with the cross beam and vertically extend from the cross beam. According to the mung bean picking device, by means of the characteristics of mung bean plants, automation of mung bean harvesting is achieved, the labor burden is relieved, and damage to the mung bean plants is avoided.
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Description

Technical Field

[0001] This invention relates to the field of mung bean harvesting technology, and more particularly to a mung bean harvesting device. Background Technology

[0002] Mung beans are an important crop and a popular food. They are widely cultivated in my country. When mung bean plants produce fruit, they form pods. As the pods mature, they turn from green to black. These black pods burst open under the sun, releasing the mung beans, which often end up in the soil and are difficult to find. Therefore, mung beans are typically harvested when the pods are about 70-80% mature. After being dried, the pods are opened to harvest the mung beans. This is the typical process of harvesting mung beans manually.

[0003] As the scale of mung bean cultivation expands, the automation of mung bean harvesting will inevitably be considered. Current automated mung bean harvesting technology generally involves using a cutting device to completely sever the plant with pods, and then using separation technology to separate the mung beans from the cut plant. This automated harvesting method is indeed highly efficient.

[0004] However, mung bean growth has its own characteristics. First, mung bean plants mature in multiple batches. For example, after one pod matures and is harvested, a new pod will grow in the same spot, maturing again. Second, multiple pods will form on different parts of the plant, and these pods often have different levels of maturity. For instance, some pods may already be harvestable black pods, while others may still be immature green pods. The advantage of manual harvesting is that it effectively identifies which pods are ready for harvest, and the harvesting process does not affect the growth of new pods in the same spot. The disadvantage is that it is inefficient and labor-intensive. Automated harvesting is indeed highly efficient, but it completely removes the plant during the harvesting process, leaving no opportunity for it to produce beans again. For the next harvest, it must be replanted and allowed to grow again, which is quite wasteful.

[0005] This invention aims to provide a mung bean harvesting device that utilizes the characteristics of the mung bean plant to automate the harvesting process, reduce labor burden, and avoid damage to the mung bean plant. The plant can still grow new pods, and the harvesting process will not affect immature pods. Summary of the Invention

[0006] This invention aims to provide a mung bean harvesting device that utilizes the characteristics of the mung bean plant to automate the harvesting process, reduce labor burden, and avoid damage to the mung bean plant. The plant can still grow new pods, and the harvesting process will not affect immature pods.

[0007] The first aspect of the present invention provides a mung bean harvesting device, comprising: a traveling vehicle; a base, the base being mounted on the traveling vehicle, a hot air fan being disposed within the base, a horizontally extending hot air main pipe extending from the base and connected to the hot air fan, a vertically extending hot air vertical pipe extending from the hot air main pipe, and a horizontally extending hot air horizontal pipe extending from the hot air vertical pipe; a receiving plate, the receiving plate being disposed at the end of the hot air vertical pipe and connected to the hot air vertical pipe, the receiving plate being close to the ground; wherein, in use, the hot air main pipe is higher than the mung bean plants, and the hot air vertical pipe and the hot air horizontal pipe pass between adjacent rows or columns of mung bean plants.

[0008] Furthermore, horizontally extending attachments are installed on the hot air riser.

[0009] Furthermore, the receiving plate is equipped with multiple buffer micropillars.

[0010] Furthermore, the width of the receiving plate is close to the distance between the main stems of adjacent mung bean plants, and the length of the receiving plate covers multiple mung bean plants.

[0011] A second aspect of the present invention provides a mung bean harvesting device, comprising: a traveling vehicle; a base, the base being disposed on the traveling vehicle, a transversely extending crossbeam extending from the base, a vertically extending frame extending from the crossbeam, and transversely extending branches extending from the frame; a receiving plate, the receiving plate being disposed at the end of the frame and connected to the frame, the receiving plate being close to the ground; and multiple heating rods, a plurality of heating rods being fixed to the crossbeam and extending vertically from the crossbeam, the heating rods being electrically and signal connected to a power supply and control module within the base; wherein, in use, the heating rods, the frame, and the branches travel between adjacent rows or columns of mung bean plants.

[0012] Furthermore, horizontally extending attachment branches are installed on the vertical frame.

[0013] Furthermore, the receiving plate is equipped with multiple buffer micropillars.

[0014] Furthermore, the width of the receiving plate is close to the distance between the main stems of adjacent mung bean plants, and the length of the receiving plate covers multiple mung bean plants.

[0015] Furthermore, the vertical frame is a screw conveyor, the receiving plate is conical, and the casing of the screw conveyor is connected to the lowest point of the receiving plate through a connecting section.

[0016] Furthermore, the screw conveyor's auger transports the mung beans in the receiving tray to the storage tank set on the crossbeam.

[0017] Furthermore, inclined connecting grooves are provided on the crossbeams, which lead to storage bins provided on the base, and the discharge ports of each screw conveyor lead to the connecting grooves.

[0018] Furthermore, multiple buffer micropillars are installed inside the mitered groove.

[0019] Furthermore, the vertical pipe is a vacuum grain suction machine.

[0020] Furthermore, the vacuum grain suction machine transports the mung beans in the receiving tray to the storage tank set on the crossbeam.

[0021] Furthermore, inclined connecting grooves are provided on the crossbeams, which lead to storage bins provided on the base, and the discharge ports of each vacuum grain suction machine lead to the connecting grooves.

[0022] This invention aims to provide a mung bean harvesting device that utilizes the characteristics of the mung bean plant to automate the harvesting process, reduce labor burden, and avoid damage to the mung bean plant. The plant can still grow new pods, and the harvesting process will not affect immature pods. Attached Figure Description

[0023] Figure 1 The diagram shown is a schematic representation of the mung bean harvesting device according to the first embodiment of the present invention.

[0024] Figure 2 The figure shown is a schematic diagram of the cross-sectional structure of the hot air riser in the first embodiment.

[0025] Figure 3 The diagram shown is a structural schematic of the receiving plate in the first embodiment.

[0026] Figure 4 The diagram shown is a schematic diagram of the mung bean harvesting device according to the second embodiment of the present invention.

[0027] Figure 5 The figure shown is a cross-sectional structural diagram of the vertical frame in the second embodiment.

[0028] Figure 6 The diagram shown is a structural schematic of the mung bean harvesting device according to the third embodiment of the present invention.

[0029] Figure 7 The diagram shown is a structural schematic of the screw conveyor of the third embodiment.

[0030] Figure 8 The diagram shown is a structural schematic of the mung bean harvesting device according to the fourth embodiment of the present invention.

[0031] Figure 9 The diagram shown is a structural schematic of the mung bean harvesting device according to the fifth embodiment of the present invention.

[0032] Figure label: 1: Walking vehicle; 2: Base; 21: Hot air main pipe; 22: Hot air vertical pipe; 23: Hot air horizontal pipe; 24: Attachment; 3: Receiving plate; 31: Buffer micro-column; 32: Connecting section; 4: Plant; 5: Crossbeam; 51: Vertical frame; 52: Horizontal branch; 53: Attached branch; 6: Heating rod; 7: Screw conveyor; 71: Pipe shell; 72: Spiral auger; 73: Motor; 8: Storage tank; 9: Angled joint groove; 91: Storage bin; 10: Vacuum grain suction machine. Detailed Implementation

[0033] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0034] Figure 1 The diagram shown is a schematic representation of the mung bean harvesting device according to the first embodiment of the present invention. Figure 2 The figure shown is a schematic diagram of the cross-sectional structure of the hot air riser in the first embodiment. Figure 3 The diagram shown is a structural schematic of the receiving plate in the first embodiment.

[0035] like Figure 1 As shown, the first embodiment of the present invention provides a mung bean harvesting device, including: a traveling vehicle 1; a base 2, the base 2 is mounted on the traveling vehicle 1, a hot air fan is installed inside the base 2, a horizontally extending hot air main pipe 21 extends from the base 2 and is connected to the hot air fan, a vertically extending hot air riser pipe 22 extends from the hot air main pipe 21, and a horizontally extending hot air cross pipe 23 extends from the hot air riser pipe 22; a receiving plate 3 is installed at the end of the hot air riser pipe 22 and connected to the hot air riser pipe 22, and the receiving plate 3 is close to the ground; wherein, in use, the hot air main pipe 21 is higher than the mung bean plants 4, and the hot air riser pipe 22 and the hot air cross pipe 23 pass between adjacent rows or columns of mung bean plants 4.

[0036] When mung bean plants produce fruit, they form pods. As the pods mature, they turn from green to black. These black pods burst open under direct sunlight, releasing the mung beans, which then fall to the ground and are difficult to find. Therefore, mung beans are harvested when the pods are about 70-80% mature and about to burst open. At this stage, the mung beans are fully mature and have not yet fallen to the ground due to the bursting pods.

[0037] Under the scorching sun, the outer skin of the mung bean pod shrinks and becomes dry and brittle due to moisture evaporation. However, the seeds and air inside the pod expand due to the heat, eventually causing the mung bean seeds to burst open and eject the seeds from the pod. The ejected seeds fall into the soil and are difficult to find. Therefore, the current approach to mung bean harvesting devices and technologies is to harvest the mung beans before the pods burst open.

[0038] The concept behind this invention is to fully utilize the characteristic of mung bean pods bursting open. During operation, the mobile cart 1 moves forward, with the hot air vertical pipe 22 and hot air horizontal pipe 23 passing between adjacent rows or columns of mung bean plants 4. Hot air is blown from the end of the hot air horizontal pipe 23. This hot air blows onto the mature pods of the mung bean plants 4, causing them to burst open. The burst mung beans are then collected by the receiving trays 3 located below. After the mobile cart 1 has completed its journey, workers only need to collect the mung beans from each receiving tray 3 to complete the harvest. Because the receiving trays 3 are located below, even mung beans bursting open due to natural sun exposure rather than hot air will be collected by the receiving trays 3. The width of the receiving trays 3 is approximately equal to the distance between the main stems of adjacent mung bean plants 4, and the length of the receiving trays 3 covers multiple mung bean plants 4. In this way, the receiving area of ​​the receiving plate 3 can cover the spacing between adjacent mung bean plants 4 as much as possible, and the length of the receiving plate 3 can cover multiple mung bean plants 4, so as to catch as many scattered mung beans as possible and avoid leaving any mung beans in the soil.

[0039] On the other hand, the main hot air pipe 21, the vertical hot air pipe 22, and the horizontal hot air pipe 23 are connected to a hot air blower located inside the base 2. When harvesting mung beans, we want the mature black bean pods to burst open; if the hot air temperature is too high, it may cause the immature mung bean pods to burst open prematurely. Therefore, by adjusting the hot air temperature of the hot air blower, we can ensure that only the mature black bean pods burst open, while the immature mung bean pods remain unaffected.

[0040] Furthermore, such as Figure 2 As shown, horizontally extending attachments 24 are provided on the hot air riser 22. When the pods burst open and the mung beans are ejected, the mung bean seeds may have a large initial velocity, scattering in all directions and falling into the soil, making them unharvestable. Figure 2 In the illustrated embodiment, a horizontally extending appendage 24 is provided on the hot air riser 22. When a mung bean bursts open, the ejected mung bean seeds will encounter various obstructions and collisions, including the branches and leaves of the mung bean plant 4, the hot air riser 22, the hot air horizontal pipe 23, and the added appendage 24. When the bursting mung bean seeds collide with the above structures, the speed of the mung bean seeds is greatly reduced, decreasing the chance of them scattering in all directions, and allowing them to fall into the receiving tray 3 below as much as possible, avoiding waste of mung bean seeds.

[0041] Furthermore, such as Figure 3 As shown, the receiving tray 3 is equipped with multiple buffer micropillars 31. When a mung bean seed falls into the receiving tray 3, it may still bounce off. Therefore, multiple buffer micropillars 31 are provided in the receiving tray 3. The buffer micropillars 31 can be made of rigid or flexible materials. When a mung bean falls into the receiving tray 3, some of the mung bean's kinetic energy is absorbed by the buffer micropillars 31, thereby reducing the chance of the mung bean bouncing off the receiving tray 3.

[0042] Current automated mung bean harvesting technology generally involves using a cutting device to completely cut the plant with pods, and then using separation technology to separate the mung beans from the cut plant. This automated harvesting method is indeed highly efficient.

[0043] However, mung bean growth has its own characteristics. First, mung bean plants mature in multiple batches. For example, after one pod matures and is harvested, a new pod will grow in the same spot, maturing again. Second, multiple pods will form on different parts of the plant, and these pods often have different levels of maturity. For instance, some pods may already be harvestable black pods, while others may still be immature green pods. The advantage of manual harvesting is that it effectively identifies which pods are ready for harvest, and the harvesting process does not affect the growth of new pods in the same spot. The disadvantage is that it is inefficient and labor-intensive. Automated harvesting is indeed highly efficient, but it completely removes the plant during the harvesting process, leaving no opportunity for it to produce beans again. For the next harvest, it must be replanted and allowed to grow again, which is quite wasteful.

[0044] In the first embodiment of this invention, the harvesting process of mung beans relies on the bursting of mature pods and the receiving tray, requiring no manual intervention and greatly saving manpower. Furthermore, by adjusting the hot air temperature, mature black bean pods can burst open without affecting immature mung bean pods. Although the hot air vertical and horizontal pipes travel between mung bean plants under the movement of the trolley, they do not damage the stems and leaves of the plants. During the slow movement, the stems and leaves automatically spring open, and after the hot air vertical and horizontal pipes leave, they automatically return to their original state. Therefore, the mung bean plants are not affected. After harvesting the mature pods, the device of the first embodiment can be used again to harvest the next batch of pods when they mature.

[0045] In the first embodiment of the present invention, the process of harvesting mung beans relies on the bursting of mature pods and the receiving tray, and does not require pulling the pods off as in manual harvesting. Therefore, it will not affect the multiple ripening of mung bean plants. New pods can still grow and ripen again at the original location where the pods burst open, and can be harvested again by the device of the first embodiment.

[0046] Current automated mung bean harvesting technology generally involves using a cutting device to completely cut the plant with pods, and then using separation technology to separate the mung beans from the cut plant. However, unlike existing mung bean harvesting devices, the mung beans harvested in the first embodiment of this invention are almost entirely pure mung beans, without any impurities such as stems, leaves, or sand. Therefore, the separation process is omitted, significantly reducing product costs.

[0047] Therefore, the mung bean harvesting device provided in the first embodiment of the present invention utilizes the characteristics of the mung bean plant itself to automate the harvesting of mung beans, reduce the labor burden, and will not damage the mung bean plant. The mung bean plant can still grow new pods, and the harvesting process will not affect the immature pods.

[0048] Figure 4 The diagram shown is a schematic diagram of the mung bean harvesting device according to the second embodiment of the present invention. Figure 5 The figure shown is a cross-sectional structural diagram of the vertical frame in the second embodiment.

[0049] like Figure 4 As shown, the second embodiment of the present invention provides a mung bean harvesting device, including: a traveling vehicle 1; a base 2, the base 2 being mounted on the traveling vehicle 1, a horizontally extending crossbeam 5 extending from the base 2, a vertically extending frame 51 extending from the crossbeam 5, and a horizontally extending branch 52 extending from the frame 51; a receiving plate 3, the receiving plate 3 being located at the end of the frame 51 and connected to the frame 51, the receiving plate 3 being close to the ground; and electric heating rods 6, a plurality of electric heating rods 6 being fixed to the crossbeam 5 and extending vertically from the crossbeam 5, the electric heating rods 6 being electrically and signal connected to a power supply and control module within the base 2; wherein, in use, the electric heating rods 6, the frame 51, and the branch 52 travel between adjacent rows or columns of mung bean plants 4.

[0050] The second embodiment differs from the first embodiment in that, while the first embodiment uses hot air to induce the mature pods to burst open, the second embodiment uses an electric heating rod to induce the bursting of mature pods. By adjusting the power of the electric heating rod 6, excessive temperature can be avoided, ensuring that mature pods burst open without affecting immature pods. After the pods burst open and the mung beans are released, the mung beans will be protected by the stems and leaves, the electric heating rod 6, the vertical frame 51, the horizontal branches 52, and the attached branches 53 (such as...). Figure 5 The obstruction and collision (as shown) reduce the speed of the mung beans, causing them to fall into the receiving tray 3 below instead of scattering around. To prevent the mung beans falling into the receiving tray 3 from bouncing away again, similar to the first embodiment, multiple buffer micropillars 31 are provided in the receiving tray 3. To catch as many falling mung beans as possible, the width of the receiving tray 3 is close to the distance between the main stems of adjacent mung bean plants 4, and the length of the receiving tray 3 covers multiple mung bean plants 4.

[0051] Similar to the first embodiment, the mung bean harvesting device of the second embodiment of the present invention will not damage the mung bean plants, can achieve multiple maturations and multiple harvests, and does not require manual operation.

[0052] Figure 6 The diagram shown is a structural schematic of the mung bean harvesting device according to the third embodiment of the present invention. Figure 7 The diagram shown is a structural schematic of the screw conveyor of the third embodiment.

[0053] like Figure 6 and Figure 7 As shown, based on the second embodiment, the vertical frame 51 is configured as a screw conveyor, the receiving plate 3 is configured as a cone, and the casing 71 of the screw conveyor is connected to the lowest point of the receiving plate 3 through the connecting section 32. The screw conveyor's auger 72 transports the mung beans in the receiving plate 3 to the storage tank 8 set on the crossbeam 5.

[0054] like Figure 7 As shown, because the receiving tray 3 is cone-shaped, the mung beans inside the receiving tray 3 roll to the lowest point of the receiving tray 3. At the lowest point of the receiving tray 3, the shell 71 of the screw conveyor is connected to the lowest point of the receiving tray 3 through the connecting section 32. The mung beans reach the lowest point of the receiving tray 3 through the gaps between the connecting sections 32. Then, the screw conveyor 72 transports the mung beans in the receiving tray 3 to the storage tank 8 set on the crossbeam 5, completing the collection of mung beans in the receiving tray 3. Similar to the previous embodiment, to prevent the mung beans entering the receiving tray 3 from bouncing away, buffer micropillars 31 can be set inside the receiving tray 3.

[0055] Figure 8 The diagram shown is a structural schematic of the mung bean harvesting device according to the fourth embodiment of the present invention. Figure 8 As shown, an inclined connecting groove 9 is provided on the crossbeam 5, leading to a storage bin 91 provided on the base 2. The discharge ports of each screw conveyor also lead to the connecting groove 9. Mung beans output from each screw conveyor enter the connecting groove 9. The mung beans in the connecting groove 9 then roll into the storage bin 91 under gravity, achieving overall collection of the mung beans from each receiving tray 3. Similar to the aforementioned embodiment, to prevent the mung beans entering the connecting groove 9 from bouncing out, multiple buffer micro-pillars can be provided within the connecting groove 9.

[0056] Figure 9 The diagram shows a schematic of the mung bean harvesting device according to the fifth embodiment of the present invention. Based on the second embodiment, the vertical pipe 51 is configured as a vacuum grain suction machine. The vacuum grain suction machine can, as in the third embodiment, transport the mung beans from the receiving tray 3 to the storage tank mounted on the crossbeam 5. Furthermore, as in the fourth embodiment, an inclined connecting groove 9 can be provided on the crossbeam 5, leading to a storage bin 91 mounted on the base 2. The discharge ports of each vacuum grain suction machine lead to the inclined connecting groove 9. The mung beans output from each vacuum grain suction machine enter the inclined connecting groove 9. The mung beans in the inclined connecting groove 9 then roll into the storage bin 91 under gravity, achieving overall collection of the mung beans from each receiving tray 3.

[0057] This invention aims to provide a mung bean harvesting device that utilizes the characteristics of the mung bean plant to automate the harvesting process, reduce labor burden, and avoid damage to the mung bean plant. The plant can still grow new pods, and the harvesting process will not affect immature pods.

[0058] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" and their orientation or positional relationships are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0059] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A mung bean harvesting device, characterized in that, include: Walking vehicle; The base is mounted on the traveling vehicle. A hot air blower is installed inside the base. A horizontally extending hot air main pipe extends from inside the base. The hot air main pipe is connected to the hot air blower. A vertically extending hot air riser extends from the hot air riser. A horizontally extending hot air duct extends from the hot air riser. The receiving plate is located at the end of the hot air riser and connected to the hot air riser. The receiving plate is close to the ground. In use, the main hot air pipe is higher than the mung bean plants, and the vertical and horizontal hot air pipes run between adjacent rows or columns of mung bean plants.

2. A mung bean harvesting device, characterized in that, include: Walking vehicle; The base is set on the traveling vehicle. A horizontal beam extends from the base, a vertical frame extends from the beam, and a horizontal branch extends from the frame. The receiving plate is located at the end of the vertical frame and connected to the vertical frame, with the receiving plate close to the ground; Electric heating rods, multiple electric heating rods are fixed to the crossbeam and extend vertically from the crossbeam, and the electric heating rods are electrically and signal connected to the power supply and control module in the base; When in use, the heating rods, vertical frames, and horizontal branches are arranged between adjacent rows or columns of mung bean plants.

3. The mung bean harvesting device according to claim 2, characterized in that, Laterally extending branches are installed on the vertical frame.

4. The mung bean harvesting device according to claim 2, characterized in that, The receiving plate is equipped with multiple buffer micropillars.

5. The mung bean harvesting device according to claim 2, characterized in that, The vertical frame is a screw conveyor, and the receiving plate is conical. The casing of the screw conveyor is connected to the lowest point of the receiving plate through a connecting section.

6. The mung bean harvesting device according to claim 5, characterized in that, Inclined grooves are provided on the crossbeams, leading to storage bins on the base, and the discharge ports of each screw conveyor lead to the grooves.

7. The mung bean harvesting device according to claim 6, characterized in that, Multiple buffer micropillars are installed inside the mitered groove.

8. The mung bean harvesting device according to claim 2, characterized in that, The vertical pipe is a vacuum grain suction machine.

9. The mung bean harvesting device according to claim 8, characterized in that, The vacuum grain suction machine transports the mung beans in the receiving tray to the storage tank set on the crossbeam.

10. The mung bean harvesting device according to claim 8, characterized in that, An inclined connecting groove is provided on the crossbeam, which leads to a storage bin provided on the base, and the discharge port of each vacuum grain suction machine leads to the connecting groove.