Potato harvesting, picking and grading device

Abstract

The utility model is applicable to the technical field of potato harvesting devices, and provides a potato harvesting, picking and grading device which comprises a vehicle body, supporting rods are connected to the positions, close to the four corners, of the top of the vehicle body, and a rotating rod is driven to rotate, so that the rotating rod can drive a plurality of flexible stirring blades to rotate; according to the potato grading device, the multiple flexible stirring blades can stir potatoes on the top of an inner cavity of the grading box, the effect of the stirring function is achieved, and then the situation that the potatoes are accumulated in the grading box, and the screening and classifying work of the potatoes is affected can be avoided; and the classifying box is driven to move left and right in the fixing frame in a reciprocating mode, and then the potatoes can be driven to move on the first screening rollers and the second screening rollers to be rapidly screened and classified, so that certain help is provided for improving the screening efficiency of the device, and the practicability of the device is improved to a certain degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of potato harvesting devices, in particular to a potato harvesting, picking and grading device. Background Art

[0002] ‌ Potato, also known as potato, is an annual herbaceous plant of the genus Solanaceae, Solanaceae. Its above-ground stem is diamond-shaped and hairy. The leaves are simple when they are first born, and gradually grow into an odd number of unequal pinnate leaves, alternating in size, and ovate to oblong. Potatoes have multiple characteristics such as food, vegetables and fruits. They are one of the important food varieties in many countries in the world and are listed among the seven major food crops, second only to rice, corn and wheat. When harvesting potatoes, farmers will use picking and grading devices to assist in harvesting, which makes it easier to sort and bag the potatoes by size.

[0003] The traditional potato harvesting, picking and grading device does not have a stirring function, which causes potatoes to accumulate inside the grading box, thereby affecting the screening and classification of potatoes. In addition, the screening efficiency of the traditional potato harvesting, picking and grading device is low, and it cannot quickly drive the potatoes to move on the screening roller for screening and classification, and its practicality is poor. Utility Model Content

[0004] The utility model provides a potato harvesting, picking and grading device, aiming to solve the problems that the existing potato harvesting, picking and grading device has no stirring function and low screening efficiency.

[0005] The utility model is realized in this way: a potato harvesting, picking and grading device comprises a vehicle body, wherein the top of the vehicle body is connected to support rods near the four corners, and the top ends of several of the support rods are commonly connected to a fixed frame, the front and rear sides of the fixed frame are connected to hinged plates near the left side, the two hinged plates are symmetrically arranged front and back with the center of the inner cavity of the fixed frame as the symmetry axis, and the adjacent sides of the two hinged plates are commonly connected to a push rod near the top center, a grading box is provided near the center of the inner cavity of the fixed frame, a battery is connected near the center of the rear side of the grading box, a feed hole is provided near the center of the top of the grading box, the inner cavity of the feed hole is connected to a feed hopper, and the inner cavity of the grading box is provided near the top Several screening rollers 1 are provided, and the front and rear ends of several screening rollers 1 are respectively connected to the front and rear inner walls of the grading box near the top; several screening rollers 2 are commonly provided at the bottom of several screening rollers 1, and the front and rear ends of several screening rollers 2 are respectively connected to the front and rear inner walls of the grading box near the bottom, and the distance between two adjacent screening rollers 2 is smaller than the distance between two adjacent screening rollers 1; the fixed frame inner cavity has a driving assembly; the driving assembly includes a guide rod located near the center of the front side of the fixed frame inner cavity, the guide rod side wall is arranged to be threaded near the center, and the left and right ends of the guide rod are respectively movably connected to the left and right inner walls of the fixed frame near the front center.

[0006] Preferably, a guide plate is sleeved on the guide rod near the center, and the rear side of the guide plate is connected to the front side of the grading box near the bottom center, a driving hole is opened near the center of the inner cavity of the guide plate, and the inner wall of the driving hole is opened with an internal thread matching the thread shape of the guide rod, a limit rod is provided on the rear side of the guide rod, and the left and right ends of the limit rod are respectively connected to the inner walls of the left and right sides of the fixed frame near the rear center, a limit plate is sleeved on the limit rod near the center, and the front side of the limit plate is connected to the rear side of the grading box near the bottom center.

[0007] Preferably, there is a fixed box at the right end of the guide rod, and the left side of the fixed box is connected to the right side of the fixed frame near the center of the front side, and the inner walls of the left and right sides of the fixed box are movably connected with driven bevel gears near the center, and the two adjacent sides of the driven bevel gears are commonly connected to a connecting rod near the center, and the left side of the driven bevel gear on the left side is connected to a rotating shaft near the center, and movable holes are opened near the center of the left side of the fixed box and the right side of the fixed frame near the front center, the left end of the rotating shaft passes through the inner cavities of the two movable holes in sequence and is connected to the right end of the guide rod near the center, and the front sides of the two driven bevel gears are commonly provided with a driving half-bevel gear, which is meshed with the two driven bevel gears, and the front side of the driven bevel gear is movably connected to the inner wall of the front side of the fixed box near the center.

[0008] Preferably, a driving motor is provided on the front side of the fixed box, the rear side of the driving motor is connected to the front side of the fixed box near the center, a circular hole is provided near the center of the front side of the fixed box, the rear end of the power output shaft of the driving motor passes through the inner cavity of the circular hole, and is connected to the front side of the driving semi-bevel gear near the center.

[0009] Preferably, the grading box is provided with a discharge port at the top near the center on the left side and at the bottom center on the right side. The two discharge ports are provided with a collecting box on the side away from the center of the inner cavity of the grading box. The right side of the collecting box on the left is connected to the left side of the grading box near the center, and the left side of the collecting box on the right is connected to the right side of the grading box near the center of the bottom.

[0010] Preferably, a rotating rod is commonly provided on the top of several of the screening rollers, and the left and right ends of the rotating rod are movably connected to the left and right inner walls of the grading box near the top center respectively, and several flexible stirring blades are connected to the upper and lower sides of the rotating rod near the center, the left end of the rotating rod is provided with a connecting cover, the right side of the connecting cover is connected to the left side of the grading box near the top center, the left side of the connecting cover is connected to a stirring motor near the center, a rotating hole is opened on the left side of the grading box near the top center, the right end of the stirring motor passes through the inner cavity of the rotating hole, and is connected to the left end of the rotating rod near the center.

[0011] Preferably, the inner wall of the grading box is connected to a collecting hopper near the bottom, a connecting port is provided near the center of the bottom of the grading box, the side wall of the collecting hopper is connected to the inner wall of the connecting port near the bottom, a discharge hole is provided near the center of the bottom of the collecting hopper, a discharge pipe is connected to the inner cavity of the discharge hole, and a solenoid valve is connected to the discharge pipe near the top.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] By driving the rotating rod to rotate, the rotating rod can drive several flexible stirring blades to rotate, so that the several flexible stirring blades can stir the potatoes on the top of the inner cavity of the grading box, thereby achieving the effect of stirring function, thereby avoiding the accumulation of potatoes inside the grading box, which affects the screening and classification of potatoes. Moreover, by driving the grading box to move back and forth left and right inside the fixed frame, the potatoes can be driven to move on several screening rollers 1 and screening rollers 2 to quickly perform screening and classification work, thereby providing certain help for improving the screening efficiency of the device and improving the practicality of the device to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the component grading box of the utility model;

[0016] Figure 3 This is a partial top view of the structure of the utility model;

[0017] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0018] In the figure: 1. Car body; 2. Support rod; 3. Fixed frame; 4. Drive assembly; 41. Guide rod; 42. Guide plate; 43. Drive motor; 44. Fixed box; 45. Limit rod; 46. Limit plate; 47. Rotating shaft; 48. Driven bevel gear; 49. Connecting rod; 410. Drive semi-bevel gear; 5. Collecting box; 6. Feed hopper; 7. Hinge plate; 8. Push rod; 9. Grading box; 10. Screening roller 1; 11. Flexible stirring blade; 12. Rotating rod; 13. Connecting cover; 14. Stirring motor; 15. Screening roller 2; 16. Collecting hopper; 17. Discharge pipe; 18. Solenoid valve. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0020] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The present invention provides a potato harvesting, picking and grading device. Figure 1-4As shown, it includes a vehicle body 1, the top of the vehicle body 1 is connected to a support rod 2 near the four corners, and the tops of several support rods 2 are commonly connected to a fixed frame 3, the front and rear sides of the fixed frame 3 are connected to a hinged plate 7 near the left side, the two hinged plates 7 are symmetrically arranged with the center of the inner cavity of the fixed frame 3 as the symmetry axis, and the adjacent sides of the two hinged plates 7 are commonly connected to a push rod 8 near the top center, a grading box 9 is provided near the center of the inner cavity of the fixed frame 3, a battery is connected near the center of the rear side of the grading box 9, a feed hole is provided near the center of the top of the grading box 9, a feed hopper 6 is connected to the inner cavity of the feed hole, a plurality of screening rollers 10 are provided near the top of the inner cavity of the grading box 9, and a plurality of screening rollers 10 are provided. The front and rear ends of 10 are respectively connected to the front and rear inner walls of the grading box 9 near the top, and several screening rollers 10 are commonly provided with several screening rollers 2 15 at the bottom. The front and rear ends of several screening rollers 2 15 are respectively connected to the front and rear inner walls of the grading box 9 near the bottom, and the spacing between two adjacent screening rollers 2 15 is smaller than the spacing between two adjacent screening rollers 10. The inner cavity of the fixed frame 3 is provided with a driving component 4; the driving component 4 includes a guide rod 41 located near the center of the inner cavity of the fixed frame 3 on the front side, and the side wall of the guide rod 41 is arranged to be threaded near the center, and the left and right ends of the guide rod 41 are respectively movably connected to the left and right inner walls of the fixed frame 3 near the front center.

[0022] It should be noted that since the existing potato harvesting, picking and grading device does not have a stirring function and the screening efficiency is low, in order to solve the problems that arise during the use of the existing potato harvesting, picking and grading device, this solution solves the problem that the existing potato harvesting, picking and grading device does not have a stirring function and the screening efficiency is low by adding a driving component 4 to the inner cavity of the fixed frame 3 and cooperating with the various components on the top of the inner cavity of the grading box 9.

[0023] In a further preferred embodiment of the present invention, Figure 1 、 3 As shown in Figure 4, a guide plate 42 is sleeved on the guide rod 41 near the center, and the rear side of the guide plate 42 is connected to the front side of the grading box 9 near the bottom center, a driving hole is opened near the center of the inner cavity of the guide plate 42, and the inner wall of the driving hole is opened with an internal thread matching the thread shape of the guide rod 41, a limiting rod 45 is provided on the rear side of the guide rod 41, and the left and right ends of the limiting rod 45 are respectively connected to the inner walls of the left and right sides of the fixed frame 3 near the rear center, a limiting plate 46 is sleeved on the limiting rod 45 near the center, and the front side of the limiting plate 46 is connected to the rear side of the grading box 9 near the bottom center.

[0024] In this embodiment, when the farmer uses the potato harvesting, picking and grading device to assist in potato harvesting, the farmer holds the push rod 8 and then pushes the push rod 8 to push the device to the potato planting land. Then the farmer picks up the potatoes and puts them into the grading box 9 through the feed hopper 6. Then the farmer drives the guide rod 41 to rotate forward or reverse. When the guide rod 41 rotates forward or reverse, the guide plate 42 can be driven to move left and right by the threaded structure thereon. When the guide plate 42 moves left and right, it can drive the grading box 9 to move back and forth left and right inside the fixed frame 3. When the grading box 9 moves left and right, it can drive the limit plate 46 to slide left and right on the limit rod 45, thereby limiting the position of the grading box 9, so that the grading box 9 can move back and forth smoothly left and right inside the fixed frame 3, thereby driving the potatoes to move on several screening rollers 10 and screening rollers 2 15 for rapid screening and classification, thereby providing certain help for improving the screening efficiency of the device.

[0025] In a further preferred embodiment of the present invention, Figure 1 、 3 As shown in FIG4 , a fixed box 44 is provided at the right end of the guide rod 41, and the left side of the fixed box 44 is connected to the right side of the fixed frame 3 near the center of the front side. The inner walls on both sides of the fixed box 44 are movably connected with driven bevel gears 48 near the center, and the two adjacent sides of the driven bevel gears 48 are commonly connected with a connecting rod 49 near the center. The left side of the driven bevel gear 48 on the left is connected with a rotating shaft 47 near the center. Movable holes are provided on the left side of the fixed box 44 near the center and on the right side of the fixed frame 3 near the center of the front side. The left end of the rotating shaft 47 passes through the inner cavities of the two movable holes in sequence and is connected to the right end of the guide rod 41 near the center. The front sides of the two driven bevel gears 48 are commonly provided with a driving half-bevel gear 410, which meshes with the two driven bevel gears 48, and the front side of the driven bevel gear 48 is movably connected to the inner wall of the front side of the fixed box 44 near the center.

[0026] In this embodiment, the farmer drives the driving half-bevel gear 410 to rotate, and the driving half-bevel gear 410 can intermittently engage with the two driven bevel gears 48 during rotation, thereby driving the two driven bevel gears 48 to rotate back and forth in the forward or reverse direction, so that the driven bevel gear 48 on the left side drives the guide rod 41 to rotate back and forth in the forward or reverse direction through the rotating shaft 47.

[0027] In a further preferred embodiment of the present invention, Figure 1 、 3As shown in FIG4 , a driving motor 43 is provided on the front side of the fixed box 44. The rear side of the driving motor 43 is connected to the front side of the fixed box 44 near the center. A circular hole is provided near the center of the front side of the fixed box 44. The rear end of the power output shaft of the driving motor 43 passes through the inner cavity of the circular hole and is connected to the front side of the driving semi-bevel gear 410 near the center.

[0028] In this embodiment, when the farmer picks up potatoes and puts them into the grading box 9 through the feed hopper 6, the farmer starts the drive motor 43 by connecting the battery near the center of the rear side of the grading box 9, so that the drive motor 43 can quickly drive the semi-bevel gear 410 to rotate when it is powered on.

[0029] In a further preferred embodiment of the present invention, Figure 1 and 2 As shown, discharge ports are provided on the top left side near the center and on the right side near the bottom center of the grading box 9. Collection boxes 5 are provided on the side of the two discharge ports away from the center of the inner cavity of the grading box 9. The right side of the collection box 5 on the left side is connected to the left side near the center of the grading box 9, and the left side of the collection box 5 on the right side is connected to the right side near the bottom center of the grading box 9.

[0030] In this embodiment, by connecting the collecting boxes 5 on both sides of the grading box 9, the two push rods 8 can collect the potatoes screened by the screening rollers 10 and 15, that is, the large potatoes are collected in the collecting box 5 on the left and the medium potatoes are collected in the collecting box 5 on the right, which makes it convenient for farmers to classify and bag the potatoes according to size.

[0031] In a further preferred embodiment of the present invention, Figure 2 As shown, a rotating rod 12 is commonly provided on the top of several screening rollers 10. The left and right ends of the rotating rod 12 are movably connected to the inner walls of the left and right sides of the grading box 9 near the top center, and several flexible stirring blades 11 are connected to the upper and lower sides of the rotating rod 12 near the center. A connecting cover 13 is provided at the left end of the rotating rod 12. The right side of the connecting cover 13 is connected to the left side of the grading box 9 near the top center. A stirring motor 14 is connected to the left side of the connecting cover 13 near the center. A rotating hole is opened on the left side of the grading box 9 near the top center. The right end of the stirring motor 14 passes through the inner cavity of the rotating hole and is connected to the left end of the rotating rod 12 near the center.

[0032] In this embodiment, when the farmer picks up potatoes and puts them into the grading box 9 through the feed hopper 6, the farmer also starts the stirring motor 14 synchronously through the battery connected to the rear side of the grading box 9 near the center, so that the stirring motor 14 can quickly drive the rotating rod 12 to rotate when it is powered on. When the rotating rod 12 rotates, it can drive several flexible stirring blades 11 to rotate, so that several flexible stirring blades 11 can stir the potatoes at the top of the inner cavity of the grading box 9, avoiding the accumulation of potatoes inside the grading box 9, which will affect the screening and classification of potatoes.

[0033] In a further preferred embodiment of the present invention, Figure 2 As shown, the inner wall of the grading box 9 is connected to a collecting hopper 16 near the bottom, a connecting port is provided near the center of the bottom of the grading box 9, the side wall of the collecting hopper 16 is connected to the inner wall of the connecting port near the bottom, a discharge hole is provided near the center of the bottom of the collecting hopper 16, a discharge pipe 17 is connected to the inner cavity of the discharge hole, and a solenoid valve 18 is connected to the discharge pipe 17 near the top.

[0034] In this embodiment, a collecting hopper 16 is connected to the bottom of the inner cavity of the grading box 9, so that the collecting hopper 16 can collect and gather the smallest potatoes that have escaped from the gap between the two adjacent screening rollers 10 and 15, so as to facilitate their discharge. When the potatoes collected and gathered inside the collecting hopper 16 need to be taken out, the farmer can open the discharge pipe 17 by starting the solenoid valve 18 by the battery connected to the rear side of the grading box 9 near the center, so that the potatoes gathered inside the collecting hopper 16 can be discharged from the inside of the grading box 9 through the discharge pipe 17.

[0035] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0036] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0037] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A potato harvesting, picking and grading device, characterized in that: The invention comprises a vehicle body (1), wherein the top of the vehicle body (1) is connected to support rods (2) near the four corners, and the tops of several support rods (2) are commonly connected to a fixed frame (3), and the front and rear sides of the fixed frame (3) are both connected to hinge plates (7) near the left side, and the two hinge plates (7) are symmetrically arranged with the center of the inner cavity of the fixed frame (3) as the symmetry axis, and the adjacent sides of the two hinge plates (7) are commonly connected to a push rod (8) near the center of the top, and the inner cavity of the fixed frame (3) is provided with a grading box (9) near the center, and the rear side of the grading box (9) is connected to a battery near the center, and the top of the grading box (9) is provided with a feed hole near the center. The inner cavity of the feed hole is connected to a feed hopper (6), the inner cavity of the grading box (9) is provided with a plurality of screening rollers (10) near the top, and the front and rear ends of the plurality of screening rollers (10) are respectively connected to the inner walls of the front and rear sides of the grading box (9) near the top, the bottoms of the plurality of screening rollers (10) are provided with a plurality of screening rollers (15), the front and rear ends of the plurality of screening rollers (15) are respectively connected to the inner walls of the front and rear sides of the grading box (9) near the bottom, and the distance between two adjacent screening rollers (15) is smaller than the distance between two adjacent screening rollers (10), and the inner cavity of the fixed frame (3) is provided with a driving component (4); The driving assembly (4) comprises a guide rod (41) located near the center of the front side of the inner cavity of the fixed frame (3), the side wall of the guide rod (41) is arranged in a threaded shape near the center, and the left and right ends of the guide rod (41) are movably connected to the left and right inner walls of the fixed frame (3) near the center of the front side.

2. A potato harvesting, picking and grading device according to claim 1, characterized in that: A guide plate (42) is sleeved on the guide rod (41) near the center, and the rear side of the guide plate (42) is connected to the front side of the grading box (9) near the bottom center. A driving hole is opened near the center of the inner cavity of the guide plate (42), and the inner wall of the driving hole is opened with an internal thread matching the thread shape of the guide rod (41). A limiting rod (45) is provided on the rear side of the guide rod (41), and the left and right ends of the limiting rod (45) are respectively connected to the inner walls of the left and right sides of the fixed frame (3) near the rear center. A limiting plate (46) is sleeved on the limiting rod (45) near the center, and the front side of the limiting plate (46) is connected to the rear side of the grading box (9) near the bottom center.

3. A potato harvesting, picking and grading device according to claim 2, characterized in that: The right end of the guide rod (41) is provided with a fixed box (44), the left side of the fixed box (44) is connected to the right side of the fixed frame (3) near the center of the front side, the inner walls of the left and right sides of the fixed box (44) are movably connected to the driven bevel gears (48) near the center, and the adjacent sides of the two driven bevel gears (48) are connected to a connecting rod (49) near the center. The left side of the driven bevel gear (48) on the left side is connected to a rotating shaft (47) near the center. Movable holes are provided near the center and near the center of the front side of the right side of the fixed frame (3). The left end of the rotating shaft (47) passes through the inner cavities of the two movable holes in sequence and is connected to the right end of the guide rod (41) near the center. The front sides of the two driven bevel gears (48) are jointly provided with a driving half-bevel gear (410). The driving half-bevel gear (410) is meshed with the two driven bevel gears (48), and the front side of the driven bevel gear (48) is movably connected to the inner wall of the front side of the fixed box (44) near the center.

4. A potato harvesting, picking and grading device according to claim 3, characterized in that: The front side of the fixed box (44) is provided with a driving motor (43), the rear side of the driving motor (43) is connected to the front side of the fixed box (44) near the center, the front side of the fixed box (44) is provided with a circular hole near the center, the rear end of the power output shaft of the driving motor (43) passes through the inner cavity of the circular hole, and is connected to the front side of the driving semi-bevel gear (410) near the center.

5. The potato harvesting, picking and grading device according to claim 1, characterized in that: The grading box (9) is provided with a discharge port at the top near the center on the left side and at the bottom center on the right side. A collecting box (5) is provided on the side of the two discharge ports away from the center of the inner cavity of the grading box (9). The right side of the collecting box (5) on the left side is connected to the left side of the grading box (9) near the center, and the left side of the collecting box (5) on the right side is connected to the right side of the grading box (9) near the bottom center.

6. The potato harvesting, picking and grading device according to claim 1, characterized in that: A rotating rod (12) is commonly provided on the top of the plurality of screening rollers (10), and the left and right ends of the rotating rod (12) are movably connected to the inner walls of the left and right sides of the grading box (9) near the center of the top, and the upper and lower sides of the rotating rod (12) are connected to a plurality of flexible stirring blades (11) near the center. The left end of the rotating rod (12) is provided with a connecting cover (13), and the right side of the connecting cover (13) is connected to the left side of the grading box (9) near the center of the top. The left side of the connecting cover (13) is connected to a stirring motor (14) near the center. A rotating hole is opened on the left side of the grading box (9) near the center of the top, and the right end of the stirring motor (14) passes through the inner cavity of the rotating hole and is connected to the left end of the rotating rod (12) near the center.

7. The potato harvesting, picking and grading device according to claim 1, characterized in that: The inner wall of the grading box (9) is connected to a collecting hopper (16) near the bottom, a connecting port is provided near the center of the bottom of the grading box (9), a side wall of the collecting hopper (16) is connected to the inner wall of the connecting port near the bottom, a discharge hole is provided near the center of the bottom of the collecting hopper (16), a discharge pipe (17) is connected to the inner cavity of the discharge hole, and a solenoid valve (18) is connected to the discharge pipe (17) near the top.

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