Sweet potato harvester

Abstract

The utility model discloses a sweet potato harvester, including frame, be equipped with on frame's soil breaking shovel, remove vine mechanism, fruit and soil separation line, storage box and main transmission shaft, be equipped with walking wheel in the lower part of frame, and main transmission shaft is connected with walking wheel transmission, and remove vine mechanism includes a pair of arc guide rod, vine cutter, and be equipped with first conveying line and potato vine collection box in the rear end of arc guide rod, and arc guide rod is the horn mouth shape that inclines downward and its end is close to the ditch, and vine cutter is set up and is combined with the top surface of the ridge, and soil breaking shovel adjustable installation is in the front end of frame and is equipped with in the rear of vine cutter. The utility model discloses through extending to the front end's remove vine mechanism, utilizes the cooperation of horn mouth shape's arc guide rod and vine cutter, simulates artificial gathering up mulch and potato vine and cutting off potato vine before soil breaking shovel digs, realizes the early classification collection of mulch and potato vine, and further makes sweet potato harvester integrated remove vine, remove film, digs, removes soil and collection function etc., further improves sweet potato reaping mechanization degree, reduces artificial dependence.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, and specifically relates to a sweet potato harvester. Background Technology

[0002] Sweet potatoes are twining herbaceous vines. Their tubers can serve as a staple food and are also an important raw material for food processing, starch production, and alcohol manufacturing. The roots, stems, and leaves are excellent fodder. Sweet potatoes are a high-yielding and highly adaptable food crop. In my country, sweet potato cultivation is widespread across diverse geographical environments. While some areas have achieved large-scale cultivation, most regions still rely on scattered, small-scale production. Furthermore, the diverse planting patterns and varying requirements limit the mechanization of the entire harvesting process. Although mechanized equipment exists to assist in sweet potato harvesting, several limitations prevent the full mechanization of the harvesting process.

[0003] Sweet potatoes are mainly grown in single-row ridges. At harvest time, the vines are still in a relatively vigorous growth stage. Due to the influence of climate, some planting areas use mulching to adapt to the climate and concentrate the growth of sweet potatoes on the taproot. Untreated vines and mulch can easily entangle and wrap around the operating parts of harvesting machinery, such as the shovel and conveyor, leading to jamming and component damage. Therefore, the current sweet potato harvesting method still requires manual removal of vines and mulch before mechanized harvesting, resulting in a relatively high degree of human intervention. During harvesting, the soil and fruit are separated and transported using a fixed-angle shovel and a grid-like conveyor line. Due to soil conditions, the growth depth and soil coverage of sweet potatoes vary in different planting areas. Existing sweet potato harvesters still have problems such as difficulty in achieving the required harvesting rate and breakage rate, incomplete separation of fruit and soil, and high soil coverage, especially in planting areas with wet clay soil, making it difficult to achieve mechanized harvesting of sweet potatoes throughout the entire process. Utility Model Content

[0004] The purpose of this utility model is to propose a sweet potato harvester to solve the problems that existing sweet potato harvesters require manual removal of vines and film before mechanical harvesting, and suffer from incomplete separation of fruit and soil, inability to adapt to different soil types, and insufficient harvesting and breakage rates, which restrict the mechanization of the entire harvesting process.

[0005] This utility model is achieved through the following technical solution: This utility model proposes a sweet potato harvester, including a frame, on which a soil-breaking shovel, a fruit-soil separation line and a storage box are arranged in sequence. The frame is provided with a walking wheel below the frame and a main drive shaft is provided on the frame. The main drive shaft is connected to the walking wheel in a driving connection. The soil-breaking shovel is adjustable and installed at the front end of the frame and tilted downwards. A vine-removing mechanism is provided above the soil-breaking shovel. The vine-removing mechanism includes a pair of downwardly tilting arc-shaped guide rods, a vine-cutting knife, a first conveyor line, and a vine collection box. The arc-shaped guide rods are funnel-shaped and their ends are set close to the ditch to gather the vines and mulch. The vine-cutting knife is installed below the arc-shaped guide rods and is set close to the top surface of the ridge. The first conveyor line is located at the rear end of the arc-shaped guide rods. The vine collection box is located at the rear end of the first conveyor line. The soil-breaking shovel is located behind the vine-cutting knife.

[0006] Based on the above scheme, by setting up a vine-removing mechanism extending to the front end above the soil-breaking shovel, the funnel-shaped arc guide rod simulates manual labor to gradually gather up the mulch and sweet potato vines, exposing the sweet potato vines and the top surface of the ridge. Then, the sweet potato vines are cut off by a vine-cutting knife to separate them from the ridge and collected separately by the first conveyor line. This replaces manual labor in automatically removing sweet potato vines and mulch before digging, avoiding interference with the separation and transportation of sweet potato fruits and soil, further improving the mechanization of sweet potato harvesting and reducing reliance on manual labor.

[0007] Preferably, the front end of the frame is provided with a fixed frame, the rear end of the arc-shaped guide rod is hinged to the fixed frame, and an angle adjustment rod is also provided between the arc-shaped guide rod and the fixed frame. One end of the angle adjustment rod is hinged to the arc-shaped guide rod, and the other end is adjustablely connected to the fixed frame. This design allows for flexible adjustment of the opening angle of the arc-shaped guide rod according to the actual width of the ridge, so that the front end of the arc-shaped guide rod can always fit against the ditch, smoothly gather the mulch and potato vines, thereby improving the applicability of the sweet potato harvester.

[0008] Preferably, the rear part of the arc-shaped guide rod is provided with a mounting frame facing downwards. The mounting frame is provided with an adjustment hole. The vine-cutting knife includes a knife base and a blade. The two ends of the knife base are fixedly connected to the mounting frame through the adjustment hole to adjust the position of the vine-cutting knife according to the height of the ridge, so as to avoid the vines remaining due to the cutting position being too high or the fruit being damaged due to the cutting position being too low.

[0009] Preferably, the upper surface of the arc-shaped guide rod is provided with guide teeth, and the guide surface of the guide teeth is convex in the direction of travel to prevent the potato vines and mulch film from accumulating too much and sliding down the arc-shaped guide rod, so as to transport them smoothly to the conveyor line.

[0010] Preferably, the vine removal mechanism further includes a second conveyor line for separating the mulch film. The second conveyor line is located below the first conveyor line and includes a sealed box with an open top surface, a blower communicating with the sealed box, a perforated plate conveyor line covering the opening of the sealed box, and a mulch film collection assembly located at the rear end of the perforated plate conveyor line. The front end of the perforated plate conveyor line extends beyond the front end of the first conveyor line, and the first conveyor line is inclined upward from the front end to the rear end. This design facilitates the direct separation of the mulch film and potato vines during the conveying process, eliminating the need for secondary manual processing and allowing for the subsequent separate utilization or processing of the potato vines and mulch film.

[0011] More preferably, the mulch film collection assembly is a winding drum, which is connected to the main drive shaft. The surface of the middle area of ​​the winding drum is provided with short hook teeth for hooking the mulch film, so as to better collect the mulch film and prevent the mulch film from floating out of the collection container and interfering with the normal operation of other parts of the harvester.

[0012] Preferably, the fruit-soil separation line includes a drive sprocket, a conveyor chain, and a mesh conveyor belt. The drive sprocket is an eccentric sprocket or an elliptical sprocket. The conveyor chain meshes with the drive sprocket for transmission. This design utilizes a non-circular drive sprocket to cause the conveyor chain to drive the mesh conveyor belt and the sweet potatoes on it to shake up and down, thereby promoting fruit-soil separation and reducing the soil coverage of the sweet potatoes. It is especially suitable for harvesting in planting areas with high humidity and high viscosity soil.

[0013] Preferably, the fruit-soil separation line includes a conveyor frame, a transmission chain, and rollers. Each roller is driven by the transmission chain through an eccentric gear or an elliptical gear. Both ends of the roller are connected to the conveyor frame through eccentric bearings. The transmission chain is connected to the main drive shaft. This design, through the eccentric connection between the rollers, the transmission chain, and the conveyor frame, allows each roller to vibrate independently up and down, so that the sweet potatoes are continuously subjected to vibrations of different directions and degrees during the conveying process, resulting in more thorough fruit-soil separation.

[0014] More preferably, the surface of the roller is uniformly covered with soft protrusions to avoid damaging the fruit peel when the roller vibrates up and down, and to further improve the fruit-soil separation effect by utilizing the rotational movement of the soft protrusions.

[0015] Preferably, the shovel includes a wedge-shaped blade, a comb-shaped rod, and a mounting plate. The wedge-shaped blade is located at the foremost end. The front end of the comb-shaped rod is connected to the rear end of the wedge-shaped blade. The comb-shaped rod is fixedly connected to the mounting plate. The comb-shaped rod includes several equally spaced rods. The mounting plate is hinged to the front end of the frame. A first adjusting linkage is provided between the two sides of the mounting plate and the frame. This design facilitates adjusting the soil penetration depth and digging angle of the shovel according to different soil types and growth depths, achieving the best balance between digging resistance, recovery rate, and integrity rate.

[0016] More preferably, the comb-shaped rod is provided with a transverse rod, and the front end of the comb-shaped rod is hinged to the wedge-shaped blade through the cooperation of a spherical head and a spherical groove. A second adjusting link is provided between the transverse rod and the wedge-shaped blade to flexibly adjust the cutting angle of the wedge-shaped blade, thereby reducing digging resistance.

[0017] Beneficial effects One of the above technical solutions has the following advantages or beneficial effects: 1) To address the issue of manual removal of sweet potato vines and plastic film before the use of existing sweet potato harvesters, a vine removal mechanism extending to the foremost end is installed above the soil-breaking shovel. This mechanism uses a funnel-shaped, arc-shaped guide rod to conform to the ditch and, during operation, simulates manual labor by gradually lifting the plastic film and vines. When the vines are exposed above the ridge, a vine-cutting knife cuts them to separate them from the ridge. The vines are then collected separately via a first and second conveyor line. This replaces manual removal of vines and plastic film before digging, preventing interference with the separation and transport of sweet potatoes from the soil. The sweet potato harvester integrates vine removal, film removal, digging, soil removal, and collection functions, further improving the mechanization of sweet potato harvesting and reducing reliance on manual labor.

[0018] 2) To address the issue of incomplete soil separation in existing sweet potato harvesters, resulting in high soil coverage on collected sweet potatoes, when a conveyor belt is used in the soil separation line, non-circular sprockets such as eccentric sprockets or elliptical sprockets are installed on the drive and driven shafts to cooperate with the conveyor chain. Alternatively, when a roller conveyor line is used, each roller is eccentrically connected to the drive chain and conveyor frame. This causes continuous shaking of the sweet potatoes during the conveying process, forcing the surface soil to detach from the sweet potatoes for more thorough separation, thereby improving the cleanliness of the sweet potatoes.

[0019] 3) To address the issue that existing sweet potato harvesters cannot adjust their digging depth and angle to adapt to different planting conditions, the soil-breaking shovel is designed as a combination of a one-piece wedge blade, a comb-shaped rod, and an adjustable angle mounting plate. This allows for adjustments to the soil-breaking shovel's depth and digging angle based on different soil types and growth depths, achieving the optimal balance between digging resistance, harvesting rate, and fruit integrity rate. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model. (a) is the overall body, and (b) is a partial schematic diagram of the fruit-soil separation line. Figure 2 This is a front view structural diagram of Embodiment 1 of the present utility model; Figure 3 This is a partial structural schematic diagram of Embodiment 1 of the present utility model; Figure 4 This is a schematic diagram of the drive shaft of the fruit and soil separation line according to Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 6 This is a partial structural schematic diagram of Embodiment 2 of the present invention; In the diagram: Frame 1; Soil-breaking shovel 2; Wedge-shaped shovel 21; Comb-shaped rod 22; Mounting plate 23; First adjusting linkage 24; Horizontal rod 25; Second adjusting linkage 26; Trellise removal mechanism 3; Storage box 5; Walking wheel 6; Main drive shaft 7; Arc-shaped guide rod 31; Guide tooth 32; Trellise cutter 33; Blade holder 331; Blade 332; Fixing frame 34; Adjusting hole 341; Mounting frame 35; Angle adjusting rod 36; First conveyor line 37; Second conveyor line 38; Sealing box 381; Exhaust fan 382; Perforated plate conveyor line 383; Rewind drum 384; Short hook tooth 385; Sweet potato vine collection box 39; Fruit and soil separation line 4; Drive sprocket 41; Conveyor chain 42; Mesh conveyor belt 43; Conveyor frame 44; Drive chain 45; Roller 46; Elliptical gear 461; Soft protruding spike 462; Eccentric bearing 47. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0022] Example 1 like Figures 1-3 As shown, this embodiment provides a sweet potato harvester, including a frame 1. The frame 1 is sequentially equipped with a soil-breaking shovel 2, a vine-removing mechanism 3, a fruit-soil separation line 4, and a storage box 5. The frame 1 is equipped with walking wheels 6, which can be manually pushed (suitable for small-area scattered planting and soft soil) or driven autonomously by external power machinery (suitable for large-scale planting and wet clay soil with high digging resistance). The frame 1 is equipped with a main drive shaft 7, which is connected to the walking wheels 6. The main drive shaft 7 can generate output power through the movement of the walking wheels 6, or it can be directly connected to the output shaft of external power machinery such as a tractor to generate output power. The main drive shaft 7 is used to provide power output for other components that require power, such as the fruit-soil separation line 4.

[0023] Among them, reference Figure 1 and Figure 3The soil-breaking shovel 2 is adjustable and mounted at the front end of the frame 1, tilted downwards. The soil-breaking shovel 2 can be a conventional comb-shaped bar 22 or a plow shovel. Preferably, in this embodiment, the soil-breaking shovel 2 includes a wedge-shaped blade 21, a comb-shaped bar 22, and a mounting plate 23. The wedge-shaped blade 21 is located at the front end and is a one-piece structure used for low-resistance soil cutting. The front end of the comb-shaped bar 22 is connected to the rear end of the wedge-shaped blade 21, and the comb-shaped bar 22 is fixedly connected to the mounting plate 23. The comb-shaped bar 22 includes several equally spaced rods to initially separate the sweet potato and soil, further reducing digging resistance. The mounting plate 23 and... The front end of the frame 1 is hinged. A first adjusting rod 24 is provided between the two sides of the mounting plate 23 and the frame 1. The first adjusting rod 24 is assembled with one end fixed and the other end movable for adjustment. In this embodiment, one end of the first adjusting rod 24 is fixedly hinged to the side of the mounting plate 23, and the other end is movably connected to the frame 1 through a combination of an oblong hole and a bolt. This increases or decreases the length of the first adjusting rod 24 between the mounting plate 23 and the frame 1, thereby adjusting the overall angle and vertical height (i.e., the depth of penetration) of the breaker shovel 2. More preferably, a transverse rod 25 is provided on the comb-shaped rod 22. The front end of the comb-shaped rod 22 is hinged to the wedge-shaped blade 21 through a combination of a spherical head and a spherical groove. A second adjusting rod 26 is provided between the transverse rod 25 and the wedge-shaped blade 21. The cutting angle of the wedge-shaped blade 21 can be flexibly adjusted through the second adjusting rod 26, further reducing the digging resistance.

[0024] Reference Figure 3 The vine removal mechanism 3 includes a pair of downwardly extending arc-shaped guide rods 31, a vine-cutting knife 33, a first conveyor line 37, and a sweet potato vine collection box 39. The arc-shaped guide rods 31 are funnel-shaped and their ends are set close to the ditch. The vine-cutting knife 33 is installed below the arc-shaped guide rods 31 and is parallel to the top surface of the ridge. The first conveyor line 37 is located at the rear end of the arc-shaped guide rods 31 and can be a belt conveyor or a roller conveyor. The sweet potato vine collection box 39 is located at the rear end of the first conveyor line 37. The soil-breaking shovel 2 is located behind the vine-cutting knife 33 to dig out the sweet potatoes after the vines have been removed.

[0025] Reference Figure 1 and Figure 4 The fruit-soil separation line 4 is used to further remove the soil adhering to the sweet potatoes during the conveying process. The fruit-soil separation line 4 includes a drive sprocket 41, a conveyor chain 42, and a mesh conveyor belt 43. The drive sprocket 41 is an eccentric sprocket or an elliptical sprocket. The conveyor chain 42 meshes with the drive sprocket 41 for transmission. By using the drive sprocket 41 with non-circular motion, the conveyor chain 42 drives the mesh conveyor belt 43 and the sweet potatoes on it to shake up and down, thereby promoting the separation of fruit and soil and reducing the soil covering rate of the sweet potatoes. It is especially suitable for harvesting in planting areas with high humidity and high viscosity soil.

[0026] Preferably, the upper surface of the arc-shaped guide rod 31 is provided with guide teeth 32. The guide surface of the guide teeth 32 protrudes in the direction of travel. When traveling, when the potato vines and mulch are transported upward along the guide teeth 32 to the conveyor line, when the potato vines and mulch accumulate too much or when the travel stops, the gathered potato vines and mulch will not slide down the arc-shaped guide rod 31 due to the constraint of the guide teeth 32, thereby ensuring that the potato vines and mulch are effectively removed.

[0027] Furthermore, to adapt to different ridge widths, a fixed frame 34 is provided at the front end of the frame 1, and the rear end of the arc-shaped guide rod 31 is hinged to the fixed frame 34. An angle adjustment rod 36 is also provided between the arc-shaped guide rod 31 and the fixed frame 34. One end of the angle adjustment rod 36 is hinged to the arc-shaped guide rod 31, and the other end is adjustablely connected to the fixed frame 34. The relative opening angle of the arc-shaped guide rod 31 can be flexibly adjusted by the angle adjustment rod 36, so that the front end of the arc-shaped guide rod 31 can always be close to the root of the ridge and fit against the ditch, thereby smoothly gathering the mulch and potato vines and improving the applicability of the sweet potato harvester. The angle adjustment rod 36 and the fixed frame 34 can adopt various adjustable connection structures: for example, the angle adjustment rod 36 is provided with an oval hole, and the angle adjustment rod 36 passes through the fixed frame 34 and is locked by bolts; or the fixed frame 34 is provided with an oval mounting hole or several mounting holes distributed at equal intervals, the angle adjustment rod 36 is provided with a fixing hole, and the fixing hole and the mounting hole are fixedly connected by bolts, pins or other means.

[0028] Furthermore, to accommodate different ridge heights, the rear part of the arc-shaped guide rod 31 is provided with mounting brackets 35 facing downwards. The mounting brackets 35 are provided with adjustment holes 341. The vine-cutting knife 33 includes a knife holder 331 and a blade 332. The two ends of the knife holder 331 are fixedly connected to the mounting brackets 35 through the adjustment holes 341, so as to adjust the position of the vine-cutting knife 33 according to the ridge height, avoiding the vine residue caused by cutting too high or the fruit damage caused by cutting too low.

[0029] In a preferred embodiment, the vine removal mechanism 3 further includes a second conveyor line 38 for separating the mulch film. The second conveyor line 38 is located below the first conveyor line 37 and includes a sealed box 381 with an open top surface, a blower 382 communicating with the sealed box 381, a perforated plate conveyor line 383 covering the opening of the sealed box 381, and a mulch film collection assembly located at the rear end of the perforated plate conveyor line 383. The front end of the perforated plate conveyor line 383 extends beyond the front end of the first conveyor line 37. The first conveyor line 37 is inclined upward from the front end to the rear end so that the mulch film is adsorbed onto the second conveyor line 38 before entering the first conveyor line 37, while the potato vines move upward with the first conveyor line 37 to achieve direct separation of the two, thereby realizing the separate collection of potato vines and mulch film.

[0030] Preferably, the mulch film collection assembly is a winding drum 384, which is connected to the main drive shaft 7. The surface of the middle area of ​​the winding drum 384 is provided with short hook teeth 385 for hooking the mulch film. In the initial stage of winding, the existing holes in the center of the mulch film cooperate with the short hook teeth 385 to achieve initial fixation of the mulch film without additional damage, which is conducive to secondary use. When winding continues, the winding drum 384 can form an auxiliary pulling force for conveying the mulch film, further promoting the separation of the mulch film from the potato vines, and also making it easier to collect the mulch film and preventing the mulch film from flying out and interfering with the normal operation of other components.

[0031] Based on the above scheme, the transmission connection method of this utility model can transmit power sequentially without causing structural interference, or each required power component can be connected to the main drive shaft 7 one by one. The transmission assembly can be a combination of gears and chains, or a synchronous belt pulley or other matching method, as long as transmission can be achieved. Specifically, the transmission connection method of this embodiment is as follows: the main drive shaft 7 is simultaneously connected to the traveling wheel 6 and the fruit and soil separation line 4, and the fruit and soil separation line 4, the second conveyor line 38, the winding drum 384, and the first conveyor line 37 are sequentially connected.

[0032] In use, the machine is propelled by human power or driven or pulled by external power machinery. The traveling wheels 6 drive the frame 1 forward. The end of the arc-shaped guide rod 31 first adheres to the ditch or slightly inserts into the surface soil in the ditch. The plastic film and sweet potato vines are lifted from the bottom and gradually gathered backward and inward along the arc-shaped guide rod 31. When the arc-shaped guide rod 31 exceeds the height of the ridge, the top surface of the ridge and the roots of the sweet potato vines are exposed. The vine-cutting knife 33, located below the arc-shaped guide rod 31, adheres to the top surface of the ridge and cuts the sweet potato vines. As the machine continues to move, the sweet potato vines and plastic film move further up along the arc-shaped guide rod 31 and are transported to the sweet potato vine collection box 39 via the first conveyor line 37 for collection. At the same time, the soil-breaking shovel 2, located behind the vine-cutting knife 33, adjusts the digging angle according to the actual ridge condition and the growth status of the sweet potatoes, digs up the sweet potatoes after the vines have been removed, and then separates the sweet potatoes from the soil via the fruit-soil separation line 4 before transporting them to the storage box 5 for storage.

[0033] This embodiment sets up a vine-removing mechanism 3 in front of the soil-breaking shovel 2 to simulate manual labor in gradually gathering up the plastic film and potato vines, cutting the potato vines, and sorting and collecting the plastic film and potato vines. This realizes the integrated functions of vine removal, film removal, digging, and collection on the sweet potato harvester, further improving the mechanization of sweet potato harvesting and reducing the reliance on manual labor.

[0034] Example 2 like Figure 5 As shown, this embodiment provides a sweet potato harvester, which differs from Embodiment 1 in that: Based on Example 1, the structure of the fruit-soil separation line 4 is optimized as follows: The fruit-soil separation line 4 includes a conveyor frame 44, a transmission chain 45, and rollers 46. Each roller 46 is driven by the transmission chain 45 through an eccentric gear or an elliptical gear 461. Both ends of the roller 46 are connected to the conveyor frame 44 through eccentric bearings 47. The transmission chain 45 is connected to the main drive shaft 7. In this embodiment, the eccentric connection between the roller 46, the transmission chain 45, and the conveyor frame 44 allows each roller 46 to vibrate independently up and down, so that the sweet potatoes are continuously subjected to vibrations of different directions and degrees provided by each roller 46 during the conveying process, resulting in more thorough fruit-soil separation.

[0035] Preferred, such as Figure 6 As shown, the surface of the roller 46 is evenly covered with soft protrusions 462 made of rubber or other materials. Preferably, the soft protrusions 462 are arranged on a flexible sleeve that is fitted over the roller 46 to avoid damaging the fruit peel when the roller 46 vibrates up and down, and to further improve the fruit-soil separation effect by utilizing the rotational movement of the soft protrusions 462.

[0036] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A sweet potato harvester, comprising a frame, on which a soil-breaking shovel, a fruit-soil separation line, and a storage box are sequentially arranged; a traveling wheel is provided below the frame; a main drive shaft is provided on the frame; and the main drive shaft is connected to the traveling wheel in a driving connection. Its features are: The soil-breaking shovel is adjustable and installed at the front end of the frame and tilted downwards. A vine-removing mechanism is provided above the soil-breaking shovel. The vine-removing mechanism includes a pair of downwardly extending arc-shaped guide rods, a vine-cutting knife, a first conveyor line, and a vine collection box. The arc-shaped guide rods are funnel-shaped and their ends are close to the ditch. The vine-cutting knife is installed below the arc-shaped guide rods and close to the top surface of the ridge. The first conveyor line is located at the rear end of the arc-shaped guide rods, and the vine collection box is located at the rear end of the first conveyor line. The soil-breaking shovel is located behind the vine-cutting knife.

2. The sweet potato harvester according to claim 1, characterized in that: The front end of the frame is provided with a fixed frame, and the rear end of the arc-shaped guide rod is hinged to the fixed frame. An angle adjustment rod is also provided between the arc-shaped guide rod and the fixed frame. One end of the angle adjustment rod is hinged to the arc-shaped guide rod, and the other end is adjustablely connected to the fixed frame.

3. The sweet potato harvester according to claim 1, characterized in that: The arc-shaped guide rod has mounting brackets at its rear end, and the mounting brackets have adjustment holes. The vine-cutting knife includes a blade holder and a blade, and the two ends of the blade holder are fixedly connected to the mounting brackets through the adjustment holes.

4. A sweet potato harvester according to claim 1, characterized in that: The upper surface of the arc-shaped guide rod is provided with guide teeth, and the guide surface of the guide teeth protrudes in the direction of travel.

5. A sweet potato harvester according to claim 1, characterized in that: The devine removal mechanism also includes a second conveyor line for separating the plastic film. The second conveyor line is located below the first conveyor line and includes a sealed box with an opening on the top surface, a blower communicating with the sealed box, a perforated plate conveyor line covering the opening of the sealed box, and a plastic film collection assembly located at the rear end of the perforated plate conveyor line. The front end of the perforated plate conveyor line extends beyond the front end of the first conveyor line, and the first conveyor line is inclined upward from the front end to the rear end.

6. A sweet potato harvester according to claim 5, characterized in that: The mulch film collection assembly is a winding drum, which is connected to the main drive shaft. The surface of the middle region of the winding drum is provided with short hook teeth for hooking the mulch film.

7. A sweet potato harvester according to claim 1, characterized in that: The fruit and soil separation line includes a drive sprocket, a conveyor chain, and a mesh conveyor belt. The drive sprocket is an eccentric sprocket or an elliptical sprocket, and the conveyor chain meshes with the drive sprocket for transmission.

8. A sweet potato harvester according to claim 1, characterized in that: The fruit and soil separation line includes a conveyor frame, a transmission chain, and rollers. Each roller is driven by the transmission chain through an eccentric gear or an elliptical gear. Both ends of the roller are connected to the conveyor frame through eccentric bearings. The transmission chain is connected to the main drive shaft.

9. A sweet potato harvester according to claim 8, characterized in that: The surface of the roller is uniformly covered with soft protrusions.

10. A sweet potato harvester according to claim 1, characterized in that: The earth-breaking shovel includes a wedge-shaped blade, a comb-shaped rod, and a mounting plate. The wedge-shaped blade is located at the front end. The front end of the comb-shaped rod is connected to the rear end of the wedge-shaped blade. The comb-shaped rod is fixedly connected to the mounting plate. The comb-shaped rod includes several equally spaced rods. The mounting plate is hinged to the front end of the frame. A first adjusting linkage is provided between the two sides of the mounting plate and the frame.

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