A potato combine harvester

Abstract

The invention discloses a potato combine harvester, which relates to the field of agricultural equipment. The invention comprises a soil crushing and stem cutting device, a rotary lifting and screening device, and a stem film cleaning device; the discharge end of the soil crushing and stem cutting device is arranged above the feed end of the rotary lifting and screening device, and the feed end of the stem film cleaning device is arranged at the vertical lifting and connecting section of the rotary lifting and screening device; so as to enable the harvester to complete potato digging, soil and potato separation, stem, weed and film separation, potato tuber transportation, and grading at one time.

Description

Technical Field

[0001] The invention relates to the field of agricultural equipment, in particular to a potato combine harvester. Background Art

[0002] Potato is the fourth largest crop in my country after wheat, rice and corn. It is mainly distributed in Inner Mongolia, Gansu, Qinghai, Ningxia and other provinces and regions, with an annual output of nearly 60 million tons of fresh potatoes. The potato planting area in my country has increased year by year at a growth rate of 100,000 hm2 / year, and the output ranks first in the world. With the continuous increase in market demand for potatoes, some large foreign companies have engaged in potato production and processing business in China, and some domestic production enterprises have also joined this field, making potato production begin to move towards large-scale and standardized production bases.

[0003] However, a cruel reality is that potato harvesting, which accounts for more than 70% of the total labor force, is still basically at the stage of semi-mechanized harvesting and semi-manual picking, which seriously affects the scale of potato production and makes it far from meeting market demand.

[0004] With the growth of planting area and output, potato harvesting has become an important research topic. At present, potato harvesters in my country are still mainly based on simple digging and manual picking. Domestic potato harvesting relies on manual or small excavators, which has low efficiency and high labor intensity, seriously restricting the potato industry's ability to produce efficiently. Summary of the invention

[0005] The object of the present invention is to provide a potato combine harvester so as to enable the harvester to complete potato digging, soil-potato separation, stem, weed and mulch separation, potato tuber transportation and grading at one time.

[0006] In order to achieve the above object, the present invention adopts the following technical means:

[0007] A potato combine harvester comprises a soil crushing and stem cutting device, a rotary lifting and screening device and a stem film cleaning device;

[0008] The discharge end of the soil crushing and stem cutting device is arranged above the feed end of the rotary lifting and screening device, and the feed end of the stem film cleaning device is arranged in the vertical lifting connecting section of the rotary lifting and screening device.

[0009] Preferably, the soil crushing and stem cutting device includes a pair of first support plates, a first conveyor belt is arranged between the two first support plates, a downwardly inclined loading tray is installed at the end of the first support plate, an extension frame is installed at one end of the first support plate facing the loading tray, the end of the extension frame extends downward and a cutting blade is rotatably installed, a pressure roller is arranged between the two cutting blades, the pressure roller is connected to the inner side wall of the first support plate by an inclined pressure rod rotatably connected thereto; the first conveyor belt includes a first power roller and a first transmission roller rotatably mounted on the side of the first support plate, the first power roller and the first transmission roller are connected by a first crawler transmission, a first receiving fence perpendicular to the side wall of the first support plate is installed between the two first crawlers, and two adjacent first receiving fences are separated and arranged.

[0010] Furthermore, an eccentric vibration device is installed on the inner side of the first support plate, and the striking end of the eccentric vibration device is in intermittent contact with the surface of the first crawler; the eccentric vibration device includes a first rotating motor installed on the side of the first support plate, the rotating end of the first rotating motor is horizontally arranged between the upper belt and the lower belt of the first crawler, and the side wall of the rotating end of the first rotating motor is installed with a rotating bar perpendicular to its axis, and the end of the rotating bar opposite to the rotating end of the first rotating motor is installed with a striking block, and the striking block is in contact with the first crawler.

[0011] Furthermore, the loading tray includes a plurality of plowshare-type strips arranged side by side and parallel to each other, and a gap for soil materials to fall is provided between two adjacent plowshare-type strips;

[0012] At the same time, the extension frame includes a horizontal rod connected to the end surface of the first support plate, and the end of the horizontal rod facing away from the first support plate is connected to a downwardly inclined connecting rod, and the connecting rod is provided with a limiting groove penetrating at both ends in the vertical direction, and the cutting blade is rotatably arranged in the limiting groove and the cutting blade is rotatably connected to the inner wall of the limiting groove;

[0013] The inner side of the bottom surface of the limiting groove is in sliding contact with the outer wall of the cutting piece.

[0014] Furthermore, the rotary lifting and screening device includes an inclined lifting conveyor belt, a horizontal conveying and screening belt is arranged below the discharge end of the lifting conveyor belt, the discharge end of the horizontal conveying and screening belt extends into the rotary lifting device, and a screening belt is arranged at the top drop-off end of the rotary lifting device, a screening belt is installed below the screening belt, a screening box is installed inside the screening box, a plurality of material distribution cavities are separated by baffles, and the side walls of the screening box are provided with discharge channels respectively connected to each of the material distribution cavities.

[0015] Furthermore, the horizontal conveying screening belt comprises a pair of horizontal limit plates connected to the bottom end of the outer wall of the lifting conveyor belt, and a vibrating screen power roller and a vibrating screen transmission roller installed on the side wall of the horizontal limit plate, the vibrating screen power roller and the vibrating screen transmission roller are connected by a pair of vibrating screen crawlers, a plurality of conveying fences parallel to each other are installed between the two vibrating screen crawlers, an eccentric striking device is installed on one side of the horizontal limit plate where the vibrating screen crawler is provided, and the striking end of the eccentric striking device faces the vibrating screen crawler;

[0016] At the same time, the rotary lifting device includes a pair of vertical surrounding plates arranged around the horizontal conveying screening belt, and surrounding power rollers are installed at the four corners of the two surrounding plates. The surrounding power rollers on each of the surrounding plates are connected through a surrounding crawler transmission, and a transport fence is installed between the two surrounding crawlers. Each of the transport fences is equipped with a material baffle plate on one side facing the horizontal conveying screening belt, and the top end of the material baffle plate is inclined toward the moving direction of the surrounding crawler, and the feeding side of the screening belt is arranged below the surrounding crawler on the top surface;

[0017] Furthermore, the screening belt is arranged as a transport section within the rotary lifting device and a screening section extending out of the rotary lifting device, the screening belt comprises a pair of screening plates parallel to the horizontal conveying screening belt, a conveying roller is installed between the two screening plates, the end of each conveying roller is connected by a transmission crawler transmission, and the conveying roller located at the end is transmission-linked to the rotating end of a power motor, the spacing between the conveying rollers located in the transport section is the same, the spacing between the conveying rollers located in the screening section gradually increases in the direction away from the transport section, the screening box is connected below the screening section, and each of the baffles is respectively arranged below the conveying roller of the screening section.

[0018] Furthermore, the stem membrane cleaning device includes a screening frame connected to the rotary lifting screening device, and rubber scrapers are evenly arranged on the transmission fence of the screening frame, and two rows of rubber scrapers are arranged on each transmission fence, and the two rows of rubber scrapers are arranged at an angle; the angle between the two rubber scrapers on each transmission fence is 40°.

[0019] Furthermore, the screening frame includes a pair of screening material support plates connected to the machine body, the inner side of the screening material support plates is rotatably mounted with a screening material rotating roller and a screening material transmission roller, the screening material rotating roller is connected to the screening material transmission roller through a screening material crawler transmission, the transmission fence is fixedly mounted between the two screening material crawlers, the two adjacent transmission fences are arranged parallel to each other and spaced apart, and the extension direction of the transmission fence is parallel to the axial direction of the screening material transmission roller;

[0020] Furthermore, a collection box is arranged below the screening rack, and the top surface of the collection box is respectively connected to the bottom surfaces of the two screening support plates, the top surface of the collection box is through-connected and connected to the gap between the two adjacent transmission fences, the discharge end of the screening rack is arranged above the collection box, and the bottom surface of the collection box is provided with a plurality of discharge ports which are parallel to each other and extend in a direction parallel to the transmission direction of the transmission fence.

[0021] Furthermore, the bottom surface of the material collecting box between two adjacent material discharging openings is provided with a material guide block parallel to the material discharging openings, and the top surface of the material guide block is inclined and inclined toward the material discharging openings respectively;

[0022] The bottom surface of the material collecting box is installed with tillage bars for tilling the land, the tillage bars are arranged in the extending direction of the material discharging port, and the tillage bars are arranged at the front step end of the material collecting box following the movement of the machine body.

[0023] During use, the present invention has the following beneficial effects:

[0024] First, the potato material is dug out from the ground under the action of the soil crushing and stem cutting device, and then enters the rotary lifting and screening device through the soil crushing and stem cutting device. Among them, the potato material is separated from the soil again in the rotary lifting and screening device, and then enters the stem film cleaning device for cleaning, so that the material after the stem film and potato are separated is discharged from the tail of the stem film cleaning device, and the potato falls from the lower end of the stem film cleaning device to the rotary lifting part in the rotary lifting and screening device, so that the potato moves upward again under the action of the rotary lifting device, falls from the top of the rotary lifting device into the screening part of the rotary lifting device, and is screened. In this way, the harvester can complete the purpose of potato digging, soil and potato separation, stem, weed and film separation, potato tuber transportation, and grading at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention.

[0026] Figure 2 It is a side view structural schematic diagram of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the soil breaking and stem cutting device of the present invention.

[0028] Figure 4 for Figure 3 Schematic diagram of the top view structure.

[0029] Figure 5 for Figure 3 Schematic diagram of the side structure.

[0030] Figure 6 for Figure 5Schematic diagram of the AA section structure.

[0031] Figure 7 It is a schematic diagram of the structure of the rotary lifting screening device of the present invention.

[0032] Figure 8 for Figure 7 Schematic diagram of the side structure.

[0033] Fig. 9 Bit Figure 8 Schematic diagram of the BB section structure.

[0034] Fig.10 for Figure 7 Schematic diagram of the side cross-sectional structure.

[0035] Fig.11 It is a schematic diagram of the structure of the stem membrane cleaning device of the present invention.

[0036] Fig.12 for Fig.11 Schematic diagram of the top view structure.

[0037] Fig.13 for Fig.11 Schematic diagram of the side structure.

[0038] Fig.14 for Fig.13 Schematic diagram of the CC cross-section structure.

[0039] Fig.15 Bit Fig.11 Schematic diagram of the side cross-sectional structure.

[0040] Among them, 1-soil crushing and stem cutting device, 101-first support plate, 102-first transmission belt, 1021-first power roller, 1022-first transmission roller, 1023-first crawler, 1024-first receiving fence, 103-loading plate, 104-extension frame, 105-cutting piece, 106-pressure roller, 107-pressure rod, 108-eccentric vibration device, 1081-first rotating motor, 1082-rotating bar, 109-limiting groove, 2-rotating lifting screening device, 201-lifting conveyor belt, 2011-lifting support plate, 2012-plate lifting belt, 202-horizontal conveying screening belt, 2021-horizontal limiting plate, 2022-vibrating screen power roller, 2023-vibrating screen transmission roller, 2024-vibrating screen crawler, 2025-conveyor fence fence, 203-slewing lifting device, 2031-surrounding plate, 2032-surrounding power roller, 2033-surrounding crawler, 2034-transport fence, 2035-material baffle, 204-screening belt, 2041-screening plate, 2042-conveying roller, 2043-drive crawler, 205-screening box, 206-baffle, 207-material distribution chamber, 208-discharging channel, 209-eccentric striking device, 210-feeding auger, 3-stem film cleaning device, 301-screening frame, 3011-screening material support plate, 3012-screening material rotating roller, 3013-screening material drive roller, 3014-screening crawler, 302-rubber scraper, 303-transmission fence, 304-collection box, 305-discharge port, 306-guide block, 307-tillage strip. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Please refer to Figure 1 and Figure 2 As shown, a potato combine harvester comprises a soil breaking and stem cutting device 1, a rotary lifting and screening device 2 and a stem film cleaning device 3;

[0048] The rotary lifting screening device 2 includes a secondary screening part, a rotary lifting part and a screening part;

[0049] The discharge end of the soil crushing and stem cutting device 1 is arranged above the feed end of the secondary screening part of the rotary lifting screening device 2, and the feed end of the stem membrane cleaning device 3 is arranged below the discharge end of the secondary screening part of the rotary lifting screening device 2 and above the feeding end of the rotary lifting part.

[0050] In this way, firstly, the potato material is dug out from the ground under the action of the soil crushing and stem cutting device 1, and then enters the rotary lifting screening device 2 through the soil crushing and stem cutting device 1, wherein, after the potato material is separated from the soil again in the rotary lifting screening device 2, it enters the stem film cleaning device 3 for cleaning, so that the material after the stem film and potato are separated is realized, and the stem film is discharged from the tail of the stem film cleaning device 3, and the potato falls from the lower end of the stem film cleaning device 3 to the rotary lifting part in the rotary lifting screening device 2, so that under the action of the rotary lifting device again, the potato moves upward, falls from the top of the rotary lifting device into the screening part of the rotary lifting device, and is screened. Thus, the harvester can complete the purpose of potato digging, soil potato separation, stem, weed and ground film separation, potato tuber transportation, and grading at one time.

[0051] For further information, please refer to Figures 3 to 6 As shown, the soil crushing and stem cutting device 1 includes a pair of first support plates 101, a first conveyor belt 102 is arranged between the two first support plates 101, a downwardly inclined loading tray 103 is installed at the end of the first support plate 101, the lower end of the loading tray 103 extends downward, and the upper end of the loading tray 103 is arranged above the feeding end of the first conveyor belt 102, and an extension frame 104 is installed at one end of the first support plate 101 facing the loading tray 103, the end of the extension frame 104 extends downward and a cutting blade 105 is rotatably installed, the axis of the cutting blade 105 is perpendicular to the plate surface of the first support plate 101, and a pressure roller 106 is arranged between the two cutting blades 105, the axis of the pressure roller 106 is parallel to the axis of the cutting blade 105, and the pressure roller 106 is connected to the inner side wall of the first support plate 101 through an inclined pressure rod 107 rotatably connected thereto.

[0052] In this way, during the process of the harvester moving forward, the weeds on both sides of the ridge surface are cut by the cutting blade 105 arranged at the front end, and the ridge and the ditch are separated, and the ridge body is allowed to enter between the two cutting blades 105, and then the ridge body is pressed by the pressing roller 106, and the ridge surface is pressed by the pressing roller 106, so that the compacted soil blocks on the ridge surface are crushed, and the pressing roller 106 can also support the entire device to prevent the cutting blade 105 from cutting too deep under the weight of the device itself. Then, after cutting the stems and crushing the soil, the broken soil blocks together with potato crops such as potatoes can move upward along the loading tray 103 with the forward movement of the device, enter the first conveyor belt 102, and be transported.

[0053] Furthermore, the first transmission belt 102 includes a first power roller 1021 and a first transmission roller 1022 rotatably installed on the side of the first support plate 101, the first power roller 1021 and the first transmission roller 1022 are connected to each other through a first crawler belt 1023, and a first receiving fence 1024 perpendicular to the side wall of the first support plate 101 is installed between the two first crawler belts 1023, and two adjacent first receiving fences 1024 are separated.

[0054] In this way, by utilizing the interval arrangement of the first receiving fences 1024, when the crops move on the first conveyor belt 102, the soil blocks that have been crushed can fall from between two adjacent first receiving fences 1024, thereby performing the first soil-material separation on the materials.

[0055] Furthermore, an eccentric vibration device 108 is installed on the inner side surface of the first support plate 101 , and the striking end of the eccentric vibration device 108 is in intermittent contact with the surface of the first crawler 1023 .

[0056] In addition, the eccentric vibration device 108 includes a first rotating motor 1081 installed on the side of the first support plate 101, the rotating end of the first rotating motor 1081 is horizontally arranged between the upper belt and the lower belt of the first crawler 1023, and the side wall of the rotating end of the first rotating motor 1081 is installed with a rotating bar 1082 perpendicular to its axis, and the rotating bar 1082 is installed with a striking block at the end opposite to the rotating end of the first rotating motor 1081, and the striking block is in contact with the first crawler 1023.

[0057] In this way, by utilizing the rotation of the first rotating motor 1081, the striking block continuously strikes the first crawler belt 1023, thereby causing the first conveyor belt 102 to continuously vibrate up and down, thereby improving the falling efficiency of the soil blocks on the first receiving fence 1024.

[0058] Furthermore, the loading tray 103 includes a plurality of plowshare-type slats arranged side by side and parallel to each other, and a gap for soil materials to fall is provided between two adjacent plowshare-type slats.

[0059] In this way, the material can be filtered during the loading process, allowing some soil to fall from the gaps between the plow-type slats.

[0060] Furthermore, the extension frame 104 includes a horizontal rod connected to the end face of the first support plate 101, and the end of the horizontal rod facing away from the first support plate 101 is connected to a downwardly inclined connecting rod, and the connecting rod is provided with a limiting groove 109 passing through both ends in the vertical direction. The cutting blade 105 is rotatably set in the limiting groove 109 and the cutting blade 105 is rotatably connected to the inner wall of the limiting groove 109.

[0061] Furthermore, the inner side of the bottom surface of the limiting groove 109 is in sliding contact with the outer wall of the cutting piece 105 .

[0062] In this way, by utilizing the mutual contact between the cutting blade 105 and the limiting groove 109 , the bottom surface of the limiting groove 109 can be utilized to clean the materials remaining and adhering to the surface of the cutting blade 105 after the cutting by the cutting blade 105 .

[0063] Recombination Figures 7 to 10 As shown, the rotary lifting and screening device 2 includes an inclined lifting conveyor belt 201, a horizontal conveying and screening belt 202 is arranged below the discharge end of the lifting conveyor belt 201, the discharge end of the horizontal conveying and screening belt 202 extends into the rotary lifting device 203, and a screening belt 204 is arranged at the top drop end of the rotary lifting device 203, and a screening box 205 is installed below the screening belt 204, and a plurality of distribution cavities 207 are separated by baffles 206 in the screening box 205, and the side walls of the screening box 205 are provided with discharge channels 208 respectively connected to each of the distribution cavities 207.

[0064] In this way, during the material transportation process, the potato material with soil after the initial screening falls into the lifting conveyor belt 201 from the previous conveying device, and then moves upward during the operation of the lifting conveyor belt 201 and falls on the horizontal conveying screening belt 202. When the material enters the horizontal conveying screening belt 202, under the action of the horizontal conveying screening belt 202, the remaining soil adhering to the potato material is screened off on the horizontal conveying screening belt 202, and then the screened potato material moves with the horizontal conveying screening belt 202. As the material is transmitted on the horizontal conveying crawler, the material falls from the unloading section of the horizontal conveying crawler and falls on the rotary lifting device 203. Then, the material moves upward around the horizontal conveying crawler under the action of the rotary lifting device 203. When the material moves upward to the top with the rotary lifting device 203, the material falls and falls on the screening belt 204. Under the action of the screening belt 204, potatoes of different sizes fall into the screening box 205, thereby completing the screening and grading of the crops. In addition, the device utilizes a three-dimensional setting to reduce the floor space occupied by the device, and during operation, it can also screen the soil from the crops.

[0065] Furthermore, the lifting conveyor belt 201 includes a pair of inclined lifting support plates 2011 , a plate-type lifting belt 2012 is installed between the two lifting support plates 2011 , and a driving motor for driving the plate-type lifting belt 2012 is installed on the outer wall of the lifting support plate 2011 .

[0066] Furthermore, the horizontal conveying screening belt 202 includes a pair of horizontal limiting plates 2021 connected to the bottom end of the outer wall of the lifting conveyor belt 201, and a vibrating screen power roller 2022 and a vibrating screen transmission roller 2023 installed on the side walls of the horizontal limiting plates 2021. The vibrating screen power roller 2022 and the screening transmission roller are connected through a pair of vibrating screen tracks 2024. A number of conveying fences 2025 parallel to each other are installed between the two vibrating screen tracks 2024. An eccentric striking device 209 is installed on one side of the horizontal limiting plate 2021 on which the vibrating screen tracks 2024 are provided, and the striking end of the eccentric striking device 209 faces the vibrating screen tracks 2024.

[0067] In this way, the eccentric striking device 209 is used to continuously strike the vibrating screen track 2024, so that the vibrating screen track 2024 forms a periodic up and down vibration, so that the conveying fence 2025 can also continuously move up and down, thereby disturbing the potato material on the conveying fence 2025, and the potato material also continuously shakes. During the shaking process, the soil on the potato material is separated from the potato material, and the soil falls from the gap between the conveying fences 2025, thereby completing the cleaning of the potato material again.

[0068] Furthermore, the rotary lifting device 203 includes a pair of vertical surrounding plates 2031 arranged around the horizontal conveying screening belt 202, and the four corners of the two surrounding plates 2031 are equipped with surrounding power rollers 2032. The surrounding power rollers 2032 on each of the surrounding plates 2031 are connected by a surrounding track 2033. A transport fence 2034 is installed between the two surrounding tracks 2033. Each of the transport fences 2034 is equipped with a material baffle plate 2035 on the side facing the horizontal conveying screening belt 202. The top end of the material baffle plate 2035 is inclined toward the moving direction of the surrounding track 2033, and the feeding side of the screening belt 204 is arranged below the surrounding track 2033 on the top surface.

[0069] Then, the screening belt 204 is configured as a transport section within the rotary lifting device 203 and a screening section extending out of the rotary lifting device 203, the screening belt 204 includes a pair of screening plates 2041 parallel to the horizontal conveying screening belt 202, a conveying roller 2042 is installed between the two screening plates 2041, the end of each conveying roller 2042 is transmission-linked by a transmission track 2043, and the conveying roller 2042 located at the end is transmission-linked to the rotating end of a power motor, the spacing between the conveying rollers 2042 located in the transport section is the same, the spacing between the conveying rollers 2042 located in the screening section gradually increases in the direction away from the transport section, the screening box 205 is connected below the screening section, and each baffle 206 is respectively arranged below the conveying roller 2042 of the screening section.

[0070] In addition, a feeding auger 210 is installed in each of the material distribution chambers 207 , and the discharge end of the feeding auger 210 faces the discharge channel 208 .

[0071] Furthermore, combined Figures 11 to 15 As shown, the stem membrane cleaning device 3 includes a screening frame 301 connected to the rotary lifting screening device 2, and rubber scrapers 302 are evenly arranged on the transmission fence 303 of the screening frame 301, and two rows of rubber scrapers 302 are arranged on each transmission fence 303, and the two rows of rubber scrapers 302 are arranged at an angle.

[0072] In this way, the potato or onion crop mud with the mulch film enters the inclined screening rack 301 from the base body, and then the rubber scraper 302 on the transmission fence 303 contacts the potato crop / mulch film mixture during the continuous operation of the transmission fence 303. Specifically, the rubber scraper 302 is inserted into the gap between the potato crop and the mulch film, and then the potato crop moves downward along the inclined screening rack 301 under the action of its own gravity, and the mulch film and stems hang on the rubber scraper 302 and move with the movement of the transmission fence 303, thereby realizing the separation of the potato crop and the stem film (stem and mulch film). This solves the problem that the traditional cleaning of potato crops and stem films is labor-intensive and time-consuming, and difficult to clean in sections.

[0073] Furthermore, the angle between the two rubber scrapers 302 on each of the transmission fences 303 is 40°.

[0074] Among them, the screening frame 301 includes a pair of screening material support plates 3011 connected to the machine body, and the inner side of the screening material support plate 3011 is rotatably installed with a screening material rotating roller 3012 and a screening material transmission roller 3013. The screening material rotating roller 3012 and the screening material transmission roller 3013 are connected through a screening material crawler 3014. The transmission fence 303 is fixedly installed between the two screening material crawlers 3014. The two adjacent transmission fences 303 are arranged in parallel with each other, and the extension direction of the transmission fence 303 is parallel to the axial direction of the screening material transmission roller 3013.

[0075] In this way, the screen material rotating roller 3012 is driven by the power equipment to rotate, so that the screen material rotating roller 3012 is used to drive the screen material transmission roller 3013 to rotate, and then the crawler drives the transmission fence 303 to move. Specifically, the transmission fence 303 on the top surface moves from bottom to top along the inclined screening frame 301, so that the potato crops slide downward, and the stem film moves upward under the action of the rubber scraper 302, and finally is thrown out from the upper end of the transmission fence 303, that is, the top discharge side of the entire screening frame 301.

[0076] Furthermore, in order to prevent the separated stem membranes from being thrown around and discarded on the ground, a collection box 304 is arranged below the screening rack 301, and the top surface of the collection box 304 is respectively connected to the bottom surfaces of the two screening support plates 3011, and the top surface of the collection box 304 is connected through and connected to the gap between the two adjacent transmission fences 303. The discharge end of the screening rack 301 is arranged above the collection box 304, and the bottom surface of the collection box 304 is provided with a plurality of discharge ports 305 which are parallel to each other and extend in a direction parallel to the transmission direction of the transmission fence 303.

[0077] In this way, the stem membranes discharged from the screening rack 301 can directly fall into the collecting box 304, thereby realizing the collection of the stem membranes. At the same time, the stem membranes in the collecting box 304 can fall regularly from the discharge port 305, so that the stem membranes can be evenly arranged on the land, which is convenient for the later collection of the stem membranes.

[0078] Furthermore, a guide block 306 parallel to the discharge opening 305 is disposed on the bottom surface of the collecting box 304 between two adjacent discharge openings 305 , and the top surface of the guide block 306 is inclined and tilted toward the discharge opening 305 .

[0079] Furthermore, the guide block 306 is used to prevent a large amount of stem film from remaining on the bottom surface of the collecting box 304 , so that the stem film can be discharged from the discharge port 305 along the inclined direction of the guide block 306 .

[0080] Furthermore, tillage bars 307 for tilling the land are installed on the bottom surface of the aggregate box 304. The tillage bars 307 are arranged in the extension direction of the discharge port 305, and the tillage bars 307 are arranged at the front step end of the aggregate box 304 that moves with the machine body.

[0081] In this way, as the entire machine body moves forward, the tillage strips 307 are used to continuously till the bottom surface, and the stem membranes falling from the discharge port 305 can directly fall into the formed grooves, thereby facilitating the subsequent burying of the screened stem membranes.

[0082] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A potato combine harvester, characterized in that: It comprises a soil crushing and stem cutting device (1), a rotary lifting and screening device (2) and a stem film cleaning device (3); The rotary lifting screening device (2) comprises a secondary screening part, a rotary lifting part and a screening part; The discharge end of the soil crushing and stem cutting device (1) is arranged above the feed end of the secondary screening part of the rotary lifting screening device (2), and the feed end of the stem membrane cleaning device (3) is arranged below the discharge end of the secondary screening part of the rotary lifting screening device (2) and above the feed end of the rotary lifting part; The soil crushing and stem cutting device (1) comprises a pair of first support plates (101), a first conveyor belt (102) is arranged between the two first support plates (101), a downwardly inclined loading tray (103) is installed at the end of the first support plate (101), an extension frame (104) is installed at one end of the first support plate (101) facing the loading tray (103), a cutting blade (105) is rotatably installed at the end of the extension frame (104), a pressing roller (106) is arranged between the two cutting blades (105), and the pressing roller (106) is rotatably connected to the pressing roller (106) by means of an inclined pressing roller. The rod (107) is connected to the inner side wall of the first support plate (101); the first transmission belt (102) comprises a first power roller (1021) and a first transmission roller (1022) rotatably mounted on the side of the first support plate (101); the first power roller (1021) and the first transmission roller (1022) are connected to each other via a first crawler belt (1023); a first receiving fence (1024) perpendicular to the side wall of the first support plate (101) is mounted between the two first crawler belts (1023); two adjacent first receiving fences (1024) are separated; An eccentric vibration device (108) is installed on the inner side surface of the first support plate (101), and the striking end of the eccentric vibration device (108) is in intermittent contact with the surface of the first crawler (1023); the eccentric vibration device (108) comprises a first rotating motor (1081) installed on the side surface of the first support plate (101), the rotating end of the first rotating motor (1081) is horizontally arranged between the upper belt and the lower belt of the first crawler (1023), a rotating bar (1082) perpendicular to the axis of the first rotating motor (1081) is installed on the side wall of the rotating end of the first rotating motor (1081), and a striking block is installed on the end of the rotating bar (1082) opposite to the rotating end of the first rotating motor (1081), and the striking block is in contact with the first crawler (1023); The loading plate (103) comprises a plurality of plowshare-type strips arranged side by side and parallel to each other, and a gap for soil to fall is provided between two adjacent plowshare-type strips; At the same time, the extension frame (104) comprises a horizontal rod connected to the end surface of the first support plate (101), one end of the horizontal rod facing away from the first support plate (101) is connected to a downwardly inclined connecting rod, and the connecting rod is provided with a limiting groove (109) penetrating both ends in the vertical direction, and the cutting blade (105) is rotatably arranged in the limiting groove (109) and the cutting blade (105) is rotatably connected to the inner wall of the limiting groove (109); The inner side of the bottom surface of the limiting groove (109) is in sliding contact with the outer wall of the cutting blade (105); The rotary lifting screening device (2) comprises a lifting conveyor belt (201) arranged obliquely, a horizontal conveying screening belt (202) being arranged below the discharge end of the lifting conveyor belt (201), the discharge end of the horizontal conveying screening belt (202) extending into the rotary lifting device (203), a screening belt (204) being arranged at the top drop end of the rotary lifting device (203), a screening box (205) being installed below the screening belt (204), a plurality of material distribution cavities (207) being separated by baffles (206) in the screening box (205), and a side wall of the screening box (205) being arranged with a discharge channel (208) respectively connected to each of the material distribution cavities (207); The horizontal conveying screening belt (202) comprises a pair of horizontal limit plates (2021) connected to the bottom end of the outer wall of the lifting conveyor belt (201), and a vibrating screen power roller (2022) and a vibrating screen transmission roller (2023) installed on the side wall of the horizontal limit plate (2021), the vibrating screen power roller (2022) and the vibrating screen transmission roller (2023) are connected to each other through a pair of vibrating screen crawlers (2024), a plurality of mutually parallel conveying fences (2025) are installed between the two vibrating screen crawlers (2024), and an eccentric striking device (209) is installed on one side of the horizontal limit plate (2021) on which the vibrating screen crawler (224) is provided, and the striking end of the eccentric striking device (209) faces the vibrating screen crawler (2024); At the same time, the rotary lifting device (203) comprises a pair of vertical surrounding plates (2031) arranged around the horizontal conveying and screening belt (202), and the four corners of the two surrounding plates (2031) are each provided with a surrounding power roller (2032), and the surrounding power roller (2032) on each of the surrounding plates (2031) is connected by a transmission via a surrounding crawler (2033), and a transport fence (2034) is installed between the two surrounding crawlers (2033), and each of the transport fences (2034) is provided with a material blocking plate (2035) on one side facing the horizontal conveying and screening belt (202), and the top end of the material blocking plate (2035) is inclined toward the moving direction of the surrounding crawler (2033), and the feeding side of the screening belt (204) is arranged below the surrounding crawler (2033) on the top surface; Furthermore, the screening belt (204) is arranged as a transport section within the rotary lifting device (203) and a screening section extending out of the rotary lifting device (203); the screening belt (204) comprises a pair of screening plates (2041) parallel to the horizontally conveying screening belt (202); a conveying roller (2042) is installed between the two screening plates (2041); the end of each conveying roller (2042) is connected by a transmission track (2043); the conveying roller (2042) at the end is connected by a transmission link with a rotating end of a power motor; the spacing between the conveying rollers (2042) in the transport section is the same; the spacing between the conveying rollers (2042) in the screening section gradually increases in a direction away from the transport section; the screening box (205) is connected below the screening section, and each baffle (206) is arranged below the conveying roller (2042) in the screening section; The stem membrane cleaning device (3) comprises a screening frame (301) connected to the rotary lifting screening device (2), and rubber scrapers (302) are evenly arranged on the transmission fence (303) of the screening frame (301), and two rows of the rubber scrapers (302) are arranged on each transmission fence (303), and the two rows of the rubber scrapers (302) are arranged at an angle; the angle between the two rubber scrapers (302) on each transmission fence (303) is 40°.

2. A potato combine harvester according to claim 1, characterized in that: The screening frame (301) comprises a pair of screening material support plates (3011) connected to the machine body; a screening material rotating roller (3012) and a screening material driving roller (3013) are rotatably mounted on the inner side surface of the screening material support plate (3011); the screening material rotating roller (3012) and the screening material driving roller (3013) are connected to each other through a screening material crawler (3014); the transmission fence (303) is fixedly mounted between the two screening material crawlers (3014); two adjacent transmission fences (303) are arranged parallel to each other and spaced apart; and the extension direction of the transmission fence (303) is parallel to the axial direction of the screening material driving roller (3013).

3. A potato combine harvester according to claim 2, characterized in that: A material collection box (304) is arranged below the screening rack (301), and the top surface of the material collection box (304) is respectively connected to the bottom surfaces of the two screening material support plates (3011), and the top surface of the material collection box (304) is connected through and communicated with the gap between the two adjacent transmission fences (303). The discharge end of the screening rack (301) is arranged above the material collection box (304), and the bottom surface of the material collection box (304) is provided with a plurality of discharge ports (305) which are parallel to each other and extend in a direction parallel to the transmission direction of the transmission fence (303).

4. A potato combine harvester according to claim 3, characterized in that: The bottom surface of the material collecting box (304) between two adjacent material discharge openings (305) is provided with a material guide block (306) parallel to the material discharge opening (305), and the top surface of the material guide block (306) is inclined and inclined toward the material discharge opening (305); The bottom surface of the material collecting box (304) is installed with tillage bars (307) for tilling the land, the tillage bars (307) are arranged in the extension direction of the discharge port (305), and the tillage bars (307) are arranged at the front step end of the material collecting box (304) following the movement of the machine body.

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