Crawler-type hand-held sweet potato harvester capable of cutting sweet potato vines

Abstract

The application discloses a caterpillar type hand-held sweet potato harvester capable of cutting sweet potato vines, relates to the technical field of potato harvesters, and comprises a rack, a driving unit, a cutting unit, a moving unit, a digging unit and a screening and collecting unit, can integrally complete cutting of plants, digging of potatoes and automatic collection, realizes accurate operation control through height-adjustable lifting rods of the cutting unit, flexibly adapts to different plant heights and terrain undulations, and is rigidly connected with the lifting rods through horizontal connecting rods to form a rigid support frame, a plurality of cutters arranged at intervals on the rigid support frame are rotationally connected to realize dynamic cutting, the multi-cutter collaborative layout greatly expands the width of single operation, and significantly improves the vine processing efficiency. The potato harvester can effectively reduce labor intensity, improve operation and harvesting efficiency and expand the applicable region.

Description

Technical Field

[0001] This application relates to the field of potato harvester technology, and more particularly to a tracked and hand-held sweet potato harvester capable of cutting sweet potato vines. Background Technology

[0002] In existing potato harvesting technologies, the harvesting process is divided into two separate stages: vine cutting and digging. This leads to significant inefficiency. Farmers must manually cut the vines and other above-ground plants before digging, which not only consumes a lot of extra time but also greatly increases labor intensity. For example, in traditional methods, vine cutting must be done separately, and the dug potatoes are scattered on the ground, forcing farmers to bend over or squat to pick them up by hand, resulting in repetitive labor. This process is not only time-consuming and labor-intensive but also easily leads to low harvesting efficiency, especially in small plots or when labor is scarce, becoming a major bottleneck restricting harvesting operations. At the same time, existing small harvesters generally lack integrated functions, and their tire-based walking mechanisms perform poorly in complex terrain (such as mountains, slopes, or soft soil). Tire slippage leads to insufficient traction and unstable machine movement, further limiting the scope of application and the continuity of operations. Utility Model Content

[0003] An exemplary embodiment of this application provides a tracked, walk-behind sweet potato harvester capable of cutting sweet potato vines to improve cutting performance during the harvesting process.

[0004] This application provides a tracked hand-held sweet potato harvester that can cut sweet potato vines, which includes a frame, a drive unit, a cutting unit, a moving unit, a digging unit, and a screening and collecting unit;

[0005] The drive unit includes a diesel engine, a first drive wheel, a connecting shaft, and a second drive wheel. The diesel engine is fixedly mounted on the frame, and the connecting shaft is rotatably connected to the frame. The first drive wheel and the second drive wheel are respectively fixedly connected to the two ends of the connecting shaft, and the output wheel of the diesel engine is connected to the first drive wheel via a belt.

[0006] The cutting unit includes a lifting rod, a connecting plate, a connecting rod, and a cutter. The connecting plate is fixedly installed on the front side of the diesel engine. The lifting rod is connected to the connecting plate, and the bottom of the lifting rod is connected to the connecting rod. The connecting rod is arranged horizontally and perpendicular to the lifting rod. Multiple cutters are spaced apart along the length of the connecting rod. The cutters are rotatably connected to the connecting rod, and the lifting rod drives the connecting rod and the cutters to move in the height direction.

[0007] The moving unit includes a drive shaft, a moving frame, rollers, and a track. The drive shaft is rotatably mounted on the frame. One end of the drive shaft is connected to the first drive wheel via a belt. The end of the drive shaft is rotatably connected to the moving frame. A plurality of rollers are rotatably connected below the moving frame. The track is arranged and connected between the drive shaft and the plurality of rollers.

[0008] The excavation unit includes a first connecting frame, a plow blade, a pusher blade, and a sieve plate. The first connecting frame is connected to the machine frame. The plow blade and the pusher blade are respectively connected to the first connecting frame. The plow blade is located in front of the pusher blade, and the two plow blades are located on both sides of the pusher blade. The sieve plate is connected to the rear of the pusher blade, and the sieve plate is provided with a plurality of first sieve holes.

[0009] The screening and collecting unit includes a second connecting frame, a collecting frame, a first rotating shaft, a second rotating shaft, a pulley, and a conveyor belt. The second connecting frame is connected to the rear side of the first connecting frame. The collecting frame is fixedly connected to the second connecting frame. The pulley is connected to the side of the collecting frame. The pulley is connected to the second drive wheel via a belt. The first rotating shaft and the second rotating shaft are rotatably connected to the collecting frame. The pulley is connected to the end of the second rotating shaft. The conveyor belt is rotatably connected between the first rotating shaft and the second rotating shaft. A transverse gap grid is formed on the conveyor belt.

[0010] Furthermore, an adjustment hole is provided on the connection part between the plow blade and the first connecting frame, and multiple adjustment holes are spaced apart in the vertical direction, with fasteners connected inside the adjustment holes.

[0011] Furthermore, an adjustment hole is provided on the connection part between the pusher and the first connecting frame, and multiple adjustment holes are spaced apart in the vertical direction, with fasteners connected inside the adjustment holes.

[0012] Furthermore, the sieve plate is connected to the front side of the collection frame in an inclined direction, and the side of the sieve plate closest to the pusher is located below the collection frame.

[0013] Furthermore, a second sieve hole is provided on the collection frame, and the flow area of ​​the second sieve hole is greater than that of the first sieve hole.

[0014] Furthermore, a handheld part is provided above the frame, and the handheld part extends in the direction toward the screening and collecting unit.

[0015] Furthermore, the plow blade is arc-shaped and the arc-shaped opening of the plow blade is arranged facing the front side of the frame, and a conveying gap is formed between the two plow blades.

[0016] Furthermore, the transversely spaced grid extends along the width direction of the conveyor belt, which is located above the bottom of the collection frame.

[0017] The embodiments of this application have the following beneficial effects:

[0018] (1) This small tracked hand-held potato harvester can simultaneously complete the cutting of above-ground plants, the digging of potatoes, and subsequent collection. The cutting unit uses a motor-driven rotating cutter to effectively cut the plants as the machine moves forward, eliminating the need for a separate manual cutting process. The digging unit uses a front plow blade to loosen the soil on the side of the row, and a rear pusher blade to push out the potatoes; the two work together to complete the digging. The harvested potatoes and soil mixture then enter the screening and collection unit.

[0019] (2) Fine soil and small soil particles are initially removed by screening through a sieve plate with perforations. Then, the mixture falls onto a conveyor belt driven by a pulley. Its transverse gap grid structure further shakes and screens larger soil clods and debris during the conveying process, while simultaneously conveying the potatoes backward. The separated potatoes fall into a collection box for centralized storage. This integrated process completely avoids the problem of potatoes scattering on the ground after digging and needing to be picked up manually, greatly reducing labor intensity and time consumption;

[0020] (3) The lifting rod has a height adjustment function, which can accurately control the position of the blades according to different plant growth conditions and terrain undulations, ensuring the integrity of the cut while avoiding excessive cutting and damage to the underground tubers. The lifting drive can be flexibly implemented using multiple methods such as gear rack, pneumatic cylinder or hydraulic cylinder. The horizontally set connecting rod is vertically connected to the lifting rod to form a rigid support frame. Multiple cutters are arranged at intervals along the length of the connecting rod and achieve dynamic cutting operations through rotational connection. The multi-blade collaborative layout significantly expands the coverage width of a single operation, while effectively reducing the risk of plant entanglement;

[0021] (4) The multi-stage screening system optimizes the efficiency of potato separation and the quality of harvest. The combination of preliminary screening by the sieve plate and further screening by the gap grid of the conveyor belt effectively reduces the entrainment of soil clods and debris, which helps to obtain cleaner potatoes and reduce the breakage rate during harvesting. The side wall of the collection frame is equipped with sieve holes with a larger flow area, which facilitates the discharge of residual soil fragments. The working depth of the plow and pusher can be flexibly adjusted vertically through the adjustment holes and fasteners at their connection points to adapt to different planting depths and soil conditions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 An exemplary schematic diagram of a tracked hand-held sweet potato harvester capable of cutting sweet potato vines is shown in an embodiment of this application.

[0024] Figure 2 This illustration shows a schematic diagram of another angle of a tracked hand-held sweet potato harvester capable of cutting sweet potato vines, provided in an embodiment of this application.

[0025] Figure 3 This illustration shows a schematic diagram of another angle of a tracked, hand-held sweet potato harvester capable of cutting sweet potato vines, provided in an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0027] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide method operation steps as shown in the following embodiments or drawings, the method may include more or fewer operation steps based on conventional or non-inventive methods. In steps where there is no logically necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application.

[0028] refer to Figures 1-3 As shown, this application provides a tracked hand-held sweet potato harvester that can cut sweet potato vines, which includes a frame 11, a drive unit, a cutting unit, a moving unit, a digging unit, and a screening and collecting unit.

[0029] The drive unit includes a diesel engine 21, a first drive wheel 22, a connecting shaft 23, and a second drive wheel 24. The diesel engine 21 is fixedly mounted on the frame 11, and the connecting shaft 23 is rotatably connected to the frame 11. The first drive wheel 22 and the second drive wheel 24 are respectively fixedly connected to the two ends of the connecting shaft 23. The output wheel of the diesel engine 21 is connected to the first drive wheel 22 via a belt.

[0030] The diesel engine 21 is fixedly mounted on the frame 11, and power is transmitted through the connecting shaft 23. The first drive wheel 22 and the second drive wheel 24 are respectively fixedly connected to both ends of the connecting shaft 23, forming a symmetrical power output structure. The output wheel of the diesel engine 21 is connected to the first drive wheel 22 via a belt, forming an efficient power transmission path. The purpose of this drive unit is to provide a stable and reliable power source for all functional modules of the machine, ensuring the coordinated operation of cutting, digging, screening and collection processes.

[0031] The diesel engine 21 serves as the power source, transmitting power simultaneously to the cutting unit and the moving unit via belt drive, enabling synchronized operation of all functional modules of the machine. The first drive wheel 22 and the second drive wheel 24 located at both ends of the connecting shaft 23 not only ensure the balance of power output but also drive the drive shaft 41 of the moving unit and the pulley 66 of the screening and collection unit via belts, forming a highly efficient power distribution system.

[0032] This drive unit adopts a mechanical transmission design, featuring simple structure, convenient maintenance, and high transmission efficiency, making it particularly suitable for the operating environment of small agricultural machinery. The power output of the drive unit can be flexibly adjusted according to operational needs. The overall machine operating speed can be adjusted by controlling the diesel engine speed, meeting different terrain conditions and operational requirements.

[0033] The cutting unit includes a lifting rod 31, a connecting plate 32, a connecting rod 33, and a cutter 34. The connecting plate 32 is fixedly installed on the front side of the diesel engine. The lifting rod 31 is connected to the connecting plate 32. The bottom of the lifting rod 31 is connected to the connecting rod 33. The connecting rod 33 is arranged horizontally and perpendicular to the lifting rod 31. Multiple cutters 34 are spaced apart along the length of the connecting rod 33. The cutters 34 are rotatably connected to the connecting rod 33. The lifting rod 31 drives the connecting rod 33 and the cutters 34 to move in the height direction.

[0034] The lifting rod 31 is fixedly connected to the front of the diesel engine via a connecting plate 32, enabling flexible adjustment of the cutting height. This component can precisely adjust the blade position for different plant heights or terrain undulations, ensuring cutting integrity while preventing the blade from excessively penetrating the soil and damaging the tubers. The lifting and lowering of the lifting rod 31 can be achieved through the meshing of a gear and rack, or by a cylinder or hydraulic cylinder.

[0035] The horizontally positioned connecting rod 33 is vertically connected to the lifting rod 31, forming a stable support structure; multiple cutters 34 are arranged at intervals along their length, achieving dynamic cutting through rotational connection. This multi-blade collaborative layout significantly expands the width of a single operation, effectively improving vine processing efficiency and reducing the risk of entanglement.

[0036] The moving unit includes a drive shaft 41, a moving frame 42, rollers 43 and a track 44. The drive shaft 41 is rotatably mounted on the frame 11. One end of the drive shaft 41 is connected to the first drive wheel 22 via a belt. The end of the drive shaft 41 is rotatably connected to the moving frame 42. Multiple rollers 43 are rotatably connected to the bottom of the moving frame 42. A connecting track 44 is arranged between the drive shaft 41 and the multiple rollers 43.

[0037] The excavation unit includes a first connecting frame 51, a plow blade 52, a pusher blade 53, and a sieve plate 54. The first connecting frame 51 is connected to the frame 11. The plow blade 52 and the pusher blade 53 are respectively connected to the first connecting frame 51. The plow blade 52 is located in front of the pusher blade 53. The two plow blades 52 are located on both sides of the pusher blade 53. The sieve plate 54 is connected to the rear of the pusher blade 53. The sieve plate 54 is provided with a plurality of first sieve holes 55.

[0038] An adjustment hole 56 is provided on the connection part between the plow blade 52 and the first connecting frame 51. Multiple adjustment holes 56 are spaced apart in the vertical direction, and fasteners are connected inside the adjustment holes 56.

[0039] The plow blade 52 is arc-shaped and the arc-shaped opening of the plow blade 52 is set facing the front side of the frame 11, and a conveying gap is formed between the two plow blades 52.

[0040] The plow blade 52 is arc-shaped with its arc-shaped opening facing the front of the frame 11. A conveying gap is formed between the two plow blades 52. The connection part between the plow blade 52 and the first connecting frame 51 is provided with adjustment holes 56 distributed vertically. The plow blade 52 can be adjusted up and down by fasteners.

[0041] During operation, the plow blade 52 loosens the soil on both sides of the potato row, making the soil around the potatoes loose and creating conditions for the subsequent pusher blade 53 to push the potatoes out. The height of the plow blade 52 can be adjusted according to the actual working conditions to adapt to different soil environments and planting conditions.

[0042] An adjustment hole 56 is provided on the connection part between the pusher 53 and the first connecting frame 51. Multiple adjustment holes 56 are spaced apart in the vertical direction, and fasteners are connected inside the adjustment holes 56.

[0043] The height of the plow blade 52 can be adjusted by adjusting the hole 56 to adapt to soils with different looseness and potato planting depths. For example, in areas with harder soil or deeper potato planting, the plow blade 52 can be adjusted to a lower position to penetrate deeper into the soil and fully loosen the soil on both sides of the potato row, avoiding difficulties in digging or damage to the potatoes due to insufficient soil loosening. In areas with looser soil or shallower potato planting, the plow blade 52 can be adjusted to a higher position to prevent it from penetrating the soil excessively, reducing unnecessary energy consumption and soil tillage.

[0044] The pusher 53 is connected to the first connecting frame 51 and located behind the plow blade 52. The connection between the pusher 53 and the first connecting frame 51 is also provided with vertically spaced adjustment holes 56, which can be adjusted in height by fasteners. After the plow blade 52 loosens the soil on both sides of the potato row, the pusher 53 pushes the potato out of the soil, separating the potato from the soil.

[0045] The potato and soil mixture is propelled forward by the mechanical movement and flows towards the screening and collection device. The height of the pusher blade 53 can be adjusted according to actual needs to ensure the effective potato pushing and improve harvesting efficiency. The adjustment hole 56 allows the height to be adjusted according to the soil loosening effect of the plow blade 52 and the actual growth of the potatoes.

[0046] When the thickness of the loosened soil layer changes with the plow blade 52, the pusher blade 53 can precisely push the potatoes out of the soil by adjusting its height, avoiding incomplete pushing or damage to the potatoes during pushing due to improper height of the pusher blade 53. At the same time, by reasonably adjusting the height of the pusher blade 53 according to different terrains or soil conditions, it can ensure that the pusher blade 53 maintains a suitable distance from the ground, improving the efficiency and integrity of potato harvesting, reducing the amount of soil mixed with potatoes, and providing convenience for subsequent screening and collection processes.

[0047] The two plow blades 52 have an arc-shaped structure, with their arc-shaped openings facing the front of the frame 11, and are located on both sides of the pusher blade 53, slightly forward. As the machine moves, the plow blades 52 first cut into the soil on both sides of the potato planting row. The arc-shaped design helps reduce forward resistance, while loosening and lifting the soil on the sides and upwards, creating a relatively loose working area and providing a channel for the subsequent pusher blade 53 operation. The conveying gap formed between the two plow blades 52 guides the pushed potatoes backwards.

[0048] The pusher blade 53 is positioned slightly behind and between the two plow blades 52, with its working blade in the loosened soil layer. After the plow blades 52 have pre-loosened the soil along the sides of the row, the pusher blade 53 moves forward, acting on the soil in the middle and bottom of the planting row. The main function of the pusher blade 53 is to push the potatoes, along with some of the attached soil, upwards from their original planting position.

[0049] Since the soil has been loosened and boundaries have been formed by the plow blades 52 on both sides, the potatoes and mixture pushed out by the pusher blades 53 are confined within the conveying gap formed by the plow blades 52, effectively reducing the potatoes from falling to both sides and ensuring that the mixture is conveyed to the screen plate 54 in a concentrated manner.

[0050] Both the plow blade 52 and the pusher blade 53 can be adjusted independently in terms of their working depth. The plow blade 52 and the pusher blade 53 are adjusted in height relative to the first connecting frame 51 via vertical adjustment holes 56 and fasteners at their respective connection points. This allows the operator to flexibly optimize the penetration depth of the plow blade 52 and the working depth of the pusher blade 53 based on actual soil hardness, potato burial depth, and other conditions, ensuring digging effectiveness and minimizing damage.

[0051] The pre-loosening action of the plow blade 52 and the pushing action of the pusher blade 53 are seamlessly connected during the continuous movement of the machine, together forming an efficient and low-damage potato digging mechanism.

[0052] The sieve plate 54 is connected to the front side of the collection frame 62 in an inclined direction, and the side of the sieve plate 54 near the pusher 53 is located below the collection frame 62.

[0053] The screening and collecting unit includes a second connecting frame 61, a collecting frame 62, a first rotating shaft 64, a second rotating shaft 65, a pulley 66, and a conveyor belt 67. The second connecting frame 61 is connected to the rear side of the first connecting frame 51, the collecting frame 62 is fixedly connected to the second connecting frame 61, and the pulley 66 is connected to the side of the collecting frame 62.

[0054] The pulley 66 is connected to the second drive wheel 24 via a belt. The first rotating shaft 64 and the second rotating shaft 65 are rotatably connected to the collection frame 62, respectively. The pulley 66 is connected to the end of the second rotating shaft 65. The first rotating shaft 64 and the second rotating shaft 65 are rotatably connected to the conveyor belt 67. A transverse gap grid 68 is formed on the conveyor belt 67. The transverse gap grid extends along the width direction of the conveyor belt 67. The conveyor belt 67 is located above the bottom of the collection frame 62.

[0055] The potato and soil mixture pushed out by the excavation unit slides onto the inclined sieve plate 54. Multiple first sieve holes 55 are evenly distributed on the surface of the sieve plate 54. During the natural slide of the material, fine soil particles and gravel are initially screened out through the sieve holes, while larger potatoes and insufficiently broken soil clods slide along the surface of the sieve plate 54 to the end.

[0056] The material then falls onto the surface of a conveyor belt 67 located above the collection frame 62. This conveyor belt 67 is driven by a first shaft 64 and a second shaft 65, and its surface is provided with a laterally extending, gapped grid structure. As the conveyor belt 67 continues to operate, it generates slight vibrations, while the grid gaps allow medium-sized clods of soil and debris to pass through. The potatoes move along the surface of the conveyor belt 67 with the grid, and the soil adhering to the surface is further shaken off and removed through vibration and relative motion. The continuous operation of the conveyor belt 67 simultaneously and smoothly transports the potatoes backward.

[0057] Finally, the potatoes, after two stages of screening, roll from the end of conveyor belt 67 into collection frame 62. The second screen opening 63 on the side wall of collection frame 62 has a larger flow area than the first screen opening 55, effectively discharging residual soil and fine impurities that were not completely removed in the initial stages. As the potatoes accumulate in collection frame 62, fine gravel that tumbles and rolls off continuously passes through the second screen opening 63 and is discharged. This tiered screening design forms a complete process from coarse to fine screening, ultimately achieving centralized containment of clean potatoes in collection frame 62, completing the entire process of automatic separation and collection of soil and potatoes without manual intervention.

[0058] A second sieve hole 63 is provided on the collection frame 62, and the flow area of ​​the second sieve hole 63 is larger than that of the first sieve hole 55. The flow area of ​​the second sieve hole 63 on the collection frame 62 is designed to be larger than that of the first sieve hole 55 on the sieve plate 54. During the potato harvesting process, the mixture first passes through the sieve plate 54 for preliminary screening. At this time, the first sieve hole 55 allows smaller soil particles and gravel to pass through, while larger potatoes and insufficiently broken soil clods are retained on the surface of the sieve plate 54 and slide down to the subsequent processing station.

[0059] Subsequently, the material enters the conveyor belt 67 for conveying and secondary screening, and medium-sized clods of soil attached to or mixed in with the potato are further separated by the transverse gap grid 68.

[0060] The second sieve hole 63 in the collection frame 62 performs the final screening function. Its large flow area allows relatively small residual soil, gravel, and some fine impurities that were not completely removed in the previous screening to pass through smoothly. This design effectively prevents particles smaller than potatoes that failed to pass through the smaller first sieve hole 55 from accumulating in the collection frame 62.

[0061] Since the collection box 62 is the final container for potatoes, if the remaining fine soil or small particles of sand cannot be discharged in time, it will not only increase the overall impurity content of the potatoes, but may also cause blockage inside the collection box 62 due to continuous accumulation, affecting the continuous operation of the equipment.

[0062] The larger flow area design helps to continuously remove fine impurities that fall through gaps as potatoes roll or accumulate in the collection frame 62. This continuous screening action ensures that the final collected potatoes achieve a higher level of cleanliness, significantly reducing the need for subsequent manual secondary cleaning.

[0063] The sieve plate 54 is inclined and positioned in front of the collection frame 62. Multiple first sieve holes 55 are opened on its surface. When the excavated potatoes and soil mixture pass through, smaller soil particles and gravel can be initially removed through the sieve holes. The inclined angle design of the sieve plate 54 allows the material to slide naturally under gravity, extending the screening time and improving the separation effect.

[0064] The conveyor belt 67 is positioned above the collection frame 62 and is driven by the first rotating shaft 64 and the second rotating shaft 65. Its surface forms a transverse gap grid structure 68, which further shakes off larger clods of soil adhering to the surface of the potatoes through vibration and gap action during the conveying process.

[0065] The side wall of the collection frame 62 is provided with a second sieve hole 63, which has a larger flow area than the first sieve hole 55. This allows residual fine sand and gravel to be discharged, ultimately ensuring that clean potatoes are stored in the collection frame 62.

[0066] This three-stage screening system achieves the step-by-step removal of impurities from the potato surface through a combination of physical screening and mechanical conveying. The sieve plate 54, as the primary screening device, mainly separates fine soil particles; the gap grid structure of the conveyor belt 67 focuses on handling larger soil clumps while ensuring stable potato transport; the secondary screening in the collection frame 62 ensures that the final harvested potatoes achieve the desired cleanliness. This tiered screening design avoids the problems of clogging or incomplete separation that can easily occur with a single screening device, with all components working together to form a complete screening process.

[0067] Specifically, the grid gap of the conveyor belt 67 can be adjusted according to actual needs to adapt to screening requirements under different soil conditions. The entire screening process requires no manual intervention and is completed automatically in continuous mechanical operation, significantly improving the efficiency and quality of potato harvesting while reducing labor intensity.

[0068] A handheld part 12 is provided on the top of the frame 11, and the handheld part 12 extends in the direction toward the screening and collection unit.

[0069] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A tracked and hand-held sweet potato harvester capable of cutting sweet potato vines, characterized in that, It includes a frame, drive unit, cutting unit, moving unit, digging unit, and screening and collecting unit; The drive unit includes a diesel engine, a first drive wheel, a connecting shaft, and a second drive wheel. The diesel engine is fixedly mounted on the frame, and the connecting shaft is rotatably connected to the frame. The first drive wheel and the second drive wheel are respectively fixedly connected to the two ends of the connecting shaft, and the output wheel of the diesel engine is connected to the first drive wheel via a belt. The cutting unit includes a lifting rod, a connecting plate, a connecting rod, and a cutter. The connecting plate is fixedly installed on the front side of the diesel engine. The lifting rod is connected to the connecting plate, and the bottom of the lifting rod is connected to the connecting rod. The connecting rod is arranged horizontally and perpendicular to the lifting rod. Multiple cutters are spaced apart along the length of the connecting rod. The cutters are rotatably connected to the connecting rod, and the lifting rod drives the connecting rod and the cutters to move in the height direction. The moving unit includes a drive shaft, a moving frame, rollers, and a track. The drive shaft is rotatably mounted on the frame. One end of the drive shaft is connected to the first drive wheel via a belt. The end of the drive shaft is rotatably connected to the moving frame. A plurality of rollers are rotatably connected below the moving frame. The track is arranged and connected between the drive shaft and the plurality of rollers. The excavation unit includes a first connecting frame, a plow blade, a pusher blade, and a sieve plate. The first connecting frame is connected to the machine frame. The plow blade and the pusher blade are respectively connected to the first connecting frame. The plow blade is located in front of the pusher blade, and the two plow blades are located on both sides of the pusher blade. The sieve plate is connected to the rear of the pusher blade, and the sieve plate is provided with a plurality of first sieve holes. The screening and collecting unit includes a second connecting frame, a collecting frame, a first rotating shaft, a second rotating shaft, a pulley, and a conveyor belt. The second connecting frame is connected to the rear side of the first connecting frame. The collecting frame is fixedly connected to the second connecting frame. The pulley is connected to the side of the collecting frame. The pulley is connected to the second drive wheel via a belt. The first rotating shaft and the second rotating shaft are rotatably connected to the collecting frame. The pulley is connected to the end of the second rotating shaft. The conveyor belt is rotatably connected between the first rotating shaft and the second rotating shaft. A transverse gap grid is formed on the conveyor belt.

2. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, An adjustment hole is provided at the connection between the plow blade and the first connecting frame. Multiple adjustment holes are spaced apart in the vertical direction, and fasteners are connected inside the adjustment holes.

3. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, An adjustment hole is provided at the connection between the pusher and the first connecting frame. Multiple adjustment holes are spaced apart in the vertical direction, and fasteners are connected inside the adjustment holes.

4. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, The sieve plate is connected to the front side of the collection frame along an inclined direction, and the side of the sieve plate closest to the pusher is located below the collection frame.

5. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, The collection frame is provided with a second sieve hole, and the flow area of ​​the second sieve hole is greater than that of the first sieve hole.

6. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, A handheld part is provided above the frame, and the handheld part extends in the direction toward the screening and collecting unit.

7. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, The plow blade is arc-shaped with its arc-shaped opening facing the front of the frame, and a conveying gap is formed between the two plow blades.

8. The tracked and hand-held sweet potato harvester capable of cutting sweet potato vines according to claim 1, characterized in that, The transverse gap grid extends along the width of the conveyor belt, which is located above the bottom of the collection frame.

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