CN215835980U

CN215835980U - Potato combined harvester

Info

Publication number: CN215835980U
Application number: CN202122352961.7U
Authority: CN
Inventors: 曹立志; 薛中原; 张龙; 陶玉娥; 李林; 田艳敏; 李树学; 李志�
Original assignee: Weichang Manchu Mongolian Autonomous County Yuannong Machinery Manufacturing Co ltd
Current assignee: Weichang Manchu Mongolian Autonomous County Yuannong Machinery Manufacturing Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-02-18
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a potato combine harvester which comprises a rack, an excavating mechanism, a potato seedling separating mechanism, a sorting table, a first loading and unloading mechanism and a second loading and unloading mechanism. The digging mechanism is arranged on the frame and is used for digging the potatoes; the potato seedling separating mechanism is arranged on the frame and used for separating the excavated potatoes from the potato seedlings; the sorting table is used for separating the potatoes after the potato seedling separation into big potatoes and small potatoes according to the size; the first loading and unloading mechanism is arranged on the rack and used for loading and unloading the large potatoes screened by the sorting table; and the second loading and unloading mechanism is arranged on the rack and is used for loading and unloading the small potatoes screened by the sorting table. The utility model provides a potato combine harvester, and aims to solve the technical problems of high manual operation cost and low efficiency when a single-function potato harvester collects potatoes.

Description

Potato combined harvester

Technical Field

The utility model belongs to the technical field of agricultural machinery, and particularly relates to a potato combine harvester.

Background

The potato harvesting method in China is mainly manual harvesting, so that the harvesting efficiency is very low and a large amount of manpower is needed. Although a plurality of potato harvesting machines appear in the market in recent years, due to the structural problem, the potato harvesting machine is single in function, some potato harvesting machines need to cut seedlings manually, some potato harvesting machines need to pick up potato blocks manually, the labor intensity of potato farmers is reduced to a certain extent, the harvesting efficiency is lower, the harvesting cost is higher, the planting benefit of the potato farmers is not ideal, and the large-area planting of potatoes is severely limited. Therefore, a potato combine harvester integrating the functions of potato seedling separation, quality sorting, packaging, self-loading and self-unloading is needed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a potato combine harvester, and aims to solve the technical problems of high manual operation cost and low efficiency when a single-function potato harvester collects potatoes.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a potato combine harvester comprising:

a frame;

the digging mechanism is arranged on the frame and is used for digging the potatoes;

the potato seedling separating mechanism is arranged on the rack and is used for separating the excavated potatoes from the potato seedlings;

the sorting table is used for separating the potatoes after the potato seedling separation into big potatoes and small potatoes according to the size of the volume;

the first loading and unloading mechanism is arranged on the rack and is used for loading and unloading the large potatoes screened by the sorting table;

and the second loading and unloading mechanism is arranged on the rack and is used for loading and unloading the small potatoes screened by the sorting table.

In one possible implementation manner, the potato seedling separating mechanism comprises a first power roller arranged on the frame, a second power roller arranged on the frame and a first conveying unit arranged on the frame and used for conveying the excavated potatoes and potato seedlings to the second power roller; the first power roller comprises a first roller body rotationally arranged on the rack, the second power roller comprises a second roller body rotationally arranged on the rack, the first roller body is positioned between the first conveying unit and the second roller body, and the first roller body and the second roller body are arranged at intervals; the periphery of the second roller body is provided with a plurality of first convex thorns which are arranged at intervals along the axial direction of the second roller body, and the first convex thorns comprise a plurality of first convex thorns which are annularly distributed on the periphery of the second roller body and used for hooking and puncturing the potato seedlings; the rotation of the first roller body is used for continuing the conveying trend of the potatoes and the potato seedlings on the first conveying unit, and the rotation direction of the second roller body is opposite to that of the first roller body so as to separate the potato seedlings from the potatoes.

In one possible implementation, the potato combine harvester further comprises a conveying mechanism for conveying the potatoes separated from the potato seedling separating mechanism to the sorting deck;

the conveying mechanism comprises a third power roller arranged on the rack, a fourth power roller arranged on the rack and a second conveying unit arranged on the rack and used for taking the potatoes and the potato seedlings from the second power roller and conveying the potatoes and the potato seedlings to the fourth power roller;

the third power roller comprises a third roller body which is rotatably arranged on the rack, the fourth power roller comprises a fourth roller body which is rotatably arranged on the rack, the third roller body is positioned between the second conveying unit and the fourth roller body, and the third roller body and the fourth roller body are arranged at intervals; a plurality of second convex thorns which are arranged at intervals along the axial direction of the fourth roller body are arranged on the periphery of the fourth roller body, and each second convex thorn comprises a plurality of second convex thorns which are annularly distributed on the periphery of the fourth roller body and are used for hooking and puncturing the potato seedlings; the rotation of the third roller body is used for continuing the conveying trend of the potatoes and the potato seedlings on the second conveying unit, and the rotation direction of the fourth roller body is opposite to that of the third roller body so as to separate the potato seedlings from the potatoes.

In a possible realization, the transfer mechanism further comprises a third transfer unit for taking potatoes from the fourth powered roller and transferring them to the sorting deck.

In a possible implementation manner, the sorting table comprises a sorting table frame body fixed on the rack, a plurality of sorting power rollers which are arranged on the sorting table frame body at intervals and used for conveying large potatoes to the first loading and unloading mechanism, and a small potato conveying unit which is positioned at the lower part of the sorting power rollers and used for receiving and conveying small potatoes to the second loading and unloading mechanism.

In one possible implementation, the sorting power roller comprises a power roller body rotatably arranged on the sorting table frame body, and a plurality of protrusions are arranged on the periphery of the power roller body along the axial direction of the power roller body.

In one possible implementation, the convex bodies are spherical structures.

In one possible implementation, the first loading and unloading mechanism comprises a potato collecting bucket which is installed on the frame and used for collecting potatoes and an unloading unit which is installed on the frame and used for packing and unloading the potatoes collected by the potato collecting bucket.

In a possible implementation manner, the unloading unit comprises a slide way frame fixedly arranged on the rack, a first hydraulic cylinder, a second hydraulic cylinder, a lifting platform arranged on the slide way frame in a sliding manner along the vertical direction, a packing and unloading hopper positioned on the lower side of the potato collecting hopper, and a collecting bag positioned in the packing and unloading hopper; the packing and unloading hopper is arranged on the lifting platform in a pitching rotating manner, and the upper end of the packing and unloading hopper is opened; the fixed end of the first hydraulic cylinder is connected with the slideway frame, and the movable end of the first hydraulic cylinder is connected with the lifting platform so as to realize the lifting of the lifting platform; the fixed end of the second hydraulic cylinder is connected with the lifting platform, and the movable end of the second hydraulic cylinder is hinged with the packing and unloading bucket, so that the packing and unloading bucket can rotate in a pitching mode.

The potato combine harvester provided by the utility model has the beneficial effects that: compared with the prior art, the potato seedling separating mechanism is used for separating potatoes from potato seedlings, the sorting table is used for sorting the potatoes according to the size of the size, and the first loading and unloading mechanism and the second loading and unloading mechanism are used for respectively loading and unloading large potatoes and small potatoes screened and separated by the sorting table. Through setting up potato seedling separating mechanism, sorting platform, first loading and unloading mechanism and second loading and unloading mechanism, realized that potato combine collects potato seedling separation, quality and selects separately, automatic dress package, automatic uninstallation etc. are in an organic whole, have reduced manual operation's cost, have improved work efficiency.

Drawings

FIG. 1 is a schematic structural view of a potato combine harvester according to an embodiment of the present invention;

FIG. 2 is a schematic view of the harvesting main structure of the potato combine harvester according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the positions of the first roller body, the second roller body, the upright stanchion and the first conveying unit of the potato combine harvester provided by the embodiment of the utility model;

FIG. 4 is a schematic view of a first loading and unloading mechanism of the potato combine according to the embodiment of the present invention;

fig. 5 is a schematic structural view of a sorting table frame body and a plurality of sorting power rollers of the potato combine harvester provided by the embodiment of the utility model.

Description of reference numerals: 10. a frame; 20. an excavating mechanism; 30. a potato seedling separating mechanism; 31. a first transfer unit; 32. a first roller body; 33. a second roller body; 331. a first spur; 3311. a first spur structure; 34. erecting a rod; 40. sorting tables; 41. a sorting table frame body; 42. a sorting power roller; 421. a power roller body; 4211. a convex body; 43. a small potato transfer unit; 50. a first loading and unloading mechanism; 51. a potato collecting hopper; 52. an unloading unit; 521. a chute frame; 522. a lifting platform; 523. a first hydraulic cylinder; 524. a second hydraulic cylinder; 525. a packing and unloading hopper; 526. a pulley; 60 a transport mechanism; 61. a second transfer unit; 62. and a third transfer unit.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," "tail," and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships illustrated in the drawings, are used for convenience in describing the utility model and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the utility model.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 5 together, a potato combine according to the present invention will now be described. The potato combine harvester comprises a frame 10, an excavating mechanism 20, a potato seedling separating mechanism 30, a sorting platform 40, a first loading and unloading mechanism 50 and a second loading and unloading mechanism. A digging mechanism 20 (the digging mechanism 20 is prior art and not described in detail herein) is mounted to the frame 10 for digging potatoes. The potato seedling separating mechanism 30 is installed on the frame 10 and used for separating the excavated potatoes and potato seedlings. The sorting table 40 is used for separating the potatoes separated from the potato seedlings into big potatoes and small potatoes according to the size of the volume. A first loader 50 is mounted on the frame 10 for loading and unloading the potatoes sifted by the sifter 40. A second loading and unloading mechanism is mounted on the frame 10 for loading and unloading the potatoes sifted by the sifting station 40. In this embodiment, the potatoes are excavated by the excavating mechanism 20 and then transferred to the potato seedling separating mechanism 30, the potato seedling separating mechanism 30 separates the potatoes and the potato seedlings, the separated potatoes are further screened out to be large potatoes and small potatoes by the sorting table 40, and the large potatoes and the small potatoes screened and separated by the sorting table 40 are respectively packed and unloaded by the first loading and unloading mechanism 50 and the second loading and unloading mechanism, so that the operation is convenient, and the working efficiency is improved.

Compared with the prior art, the potato combine harvester provided by the embodiment of the utility model has the advantages that the potatoes are separated from potato seedlings by the potato seedling separation mechanism, the potatoes are classified according to the volume by the sorting table, and the large potatoes and the small potatoes screened and separated by the sorting table are respectively packed and unloaded by the first loading and unloading mechanism and the second loading and unloading mechanism. Through setting up potato seedling separating mechanism, sorting platform, first loading and unloading mechanism and second loading and unloading mechanism, realized that potato combine collects potato seedling separation, quality and selects separately, automatic dress package, automatic uninstallation etc. are in an organic whole, have reduced manual operation's cost, have improved work efficiency.

In some embodiments, the first and second attachment mechanisms 50 and 50 are identical in structure.

In some embodiments, referring to fig. 1 and 3, the potato seedling separating mechanism 30 includes a first power roller, a second power roller and a first conveying unit 31, all of which are mounted on the frame 10. The first transfer unit 31 is used to transfer the excavated potatoes and potato seedlings to the second powered roller. The first power roller comprises a first roller body 32 rotatably arranged on the rack 10 and a first motor used for driving the first roller body 32 to rotate, and the second power roller comprises a second roller body 33 rotatably arranged on the rack 10 and a second motor used for driving the second roller body 33 to rotate.

The first roller 32 is located between the first conveying unit 31 and the second roller 33, and a space is provided between the first roller 32 and the second roller 33. The periphery of second roll body 32 is equipped with a plurality of first spurs 331 that set up along its axial interval, and first spurs 331 include a plurality of first protruding thorn structures 3311, and first protruding thorn structure 3311 encircles the periphery of cloth at second roll body 33, and first protruding thorn structure 3311 is used for the hook thorn seedling. There is a space between the first barbed structures 3311 and the first roller body 32, which of course is smaller than the size of the small potatoes being sifted out, preventing the small potatoes from falling out of between the first barbed structures 3311 and the first roller body 32.

The rotation of the first roller body 32 serves to continue the conveying tendency of the potatoes and potato seedlings on the first conveying unit 31. The second roller body 33 and the first roller body 32 rotate in opposite directions, thereby separating the potato seedlings from the potatoes. Optionally, the surfaces of the first roller body 32 and the first protruding spine 331 are made of a casting glue material, so that damage to the potato skin in the separation process is avoided.

In this embodiment, the potatoes and the potato seedlings are conveyed to the first power roller through the first conveying unit 31, a plurality of upright posts 34 are arranged between the first conveying unit 31 and the first power roller at intervals, the upright posts 34 are used for blocking a part of the potato seedling vines, a gap is arranged between the first conveying unit 31 and the first roller body 32, and the blocked potato seedling vines fall onto the ground along with the transmission of the first conveying unit 31. The first motor drives the first roller body 32 to rotate, the rotation of the first roller body 32 is used for continuing the conveying trend of the potatoes and the potato seedlings on the first conveying unit 31, the second motor drives the second roller body 33 to rotate, but the rotating direction of the second roller body 33 is opposite to that of the first roller body 32, and therefore the potato seedlings are separated from the potatoes.

In some embodiments, referring to fig. 1, the potato combine harvester of the present invention further comprises a conveying mechanism 60. The potatoes separated from the potato seedling separating mechanism 30 are transferred to the sorting deck 40 by a transfer mechanism 60.

The transfer mechanism 60 includes a third power roller, a fourth power roller, and a second transfer unit 61, all mounted on the frame. Potatoes and potato seedlings taken from the second powered roller are conveyed to the fourth powered roller by the second conveying unit 61. The third power roller comprises a third roller body rotatably arranged on the rack 10 and a third motor used for driving the third roller body to rotate, and the fourth power roller comprises a fourth roller body rotatably arranged on the rack 10 and a fourth motor used for driving the fourth roller body to rotate.

The third roller body is positioned between the second conveying unit 61 and the fourth roller body, and a space is provided between the third roller body and the fourth roller body. The periphery of the fourth roller body is provided with a plurality of second protruding thorns arranged at intervals along the axial direction of the fourth roller body, each second protruding thorn comprises a plurality of second protruding thorns, the second protruding thorns are annularly distributed on the periphery of the fourth roller body, and the second protruding thorns are used for hooking the sweet potato seedlings. And a space exists between the second convex thorn structures and the third roller body, and the space is smaller than the size of the small potatoes screened out, so that the small potatoes are prevented from falling between the second convex thorn structures and the third roller body.

The rotation of the third roller body serves to continue the conveying tendency of the potatoes and potato seedlings on the second conveying unit 61. The fourth roller body and the third roller body rotate in opposite directions, so that the potato seedlings which are not separated are separated from the potatoes. Optionally, the surfaces of the third roller body and the second convex thorns are made of a glue casting material, so that damage to the potato skins in the separation process is avoided.

In the embodiment, the potatoes and the potato seedlings are conveyed to the third power roller through the second conveying unit 61, a plurality of vertical rods 34 arranged at intervals are arranged between the second conveying unit and the third power roller, the vertical rods 34 are used for blocking a part of the potato seedling vines, a gap is formed between the second conveying unit 61 and the third roller body, and the blocked potato seedling vines fall onto the ground along with the transmission of the second conveying unit 61. The third motor drives the third roller body to rotate, the rotation of the third roller body is used for continuing the conveying trend of the potatoes and the potato seedlings on the second conveying unit 61, the fourth motor drives the fourth roller body to rotate, but the rotating directions of the fourth roller body and the third roller body are opposite, so that the potato seedlings which are remained and not completely separated are separated from the potatoes.

In some embodiments, referring to fig. 1, the transfer mechanism 60 further includes a third transfer unit 62. The third transfer unit 62 is adapted to take the potatoes at the fourth powered roller and transfer the potatoes to the sorting deck 40.

In some embodiments, referring to fig. 1 and 5, the sorting deck 40 includes a sorting deck frame 41, sorting powered rollers 42, and a small potato transport unit 43. The sorting deck frame body 41 is fixedly installed on the frame 10. A plurality of sorting power rollers 42 are arranged on the sorting deck body 41 at regular intervals, and the sorting power rollers 42 are used for conveying the screened large potatoes to the first loading and unloading mechanism 50. A small potato transfer unit 43 is located below the sorting power roller 42, and the small potato transfer unit 43 is used to take and convey small potatoes falling from the sorting power roller 42 and transfer the small potatoes to a second loading and unloading mechanism.

In this embodiment, the sorting deck 40 includes sorting powered rollers 42 and a small potato transport unit 43 located below the sorting powered rollers. The sorting power roller 42 is used for screening large potatoes and conveying the large potatoes to the first loading and unloading mechanism 50 to complete packing and unloading, and the small potato conveying unit 43 is used for receiving and conveying small potatoes falling from the sorting power roller 42 and conveying the small potatoes to the second loading and unloading mechanism to complete packing and unloading, so that the working efficiency is improved.

In some embodiments, referring to fig. 5, the sorting power roller 42 includes a power roller body 421 rotatably disposed on the sorting deck body 41. A plurality of convex bodies 4211 are arranged on the periphery of the power roller body 421, and the convex bodies 4211 are arranged along the axial direction of the power roller body 421.

In some embodiments, referring to FIG. 5, the protrusions 4211 are spherical such that the small potatoes can fall through the gaps between the powered rollers 421 without protrusions 4211 to the small potato transport unit 43, and the spacing between the powered rollers 421 is adjustable to complete the sorting of the large and small potatoes.

In some embodiments, the protrusions 4211 are gel-cast members to prevent damage to the potato skin, thereby ensuring the quality of the separated potatoes.

In some embodiments, referring to fig. 1, the first handling mechanism 50 includes a potato collecting hopper 51 and an unloading unit 52, both mounted on the frame 10. Unloading unit 52 is used for packing and uninstalling the potato, and the upper end opening setting of collection potato fill 51 is equipped with first plate body and second plate body in the bottom of collection potato fill 51, and first plate body and second plate body all are connected with the lateral wall rotation of collection potato fill 51. In this embodiment, in the process of collecting the potatoes, the first plate body and the second plate body are in a vertical state, the bottom end of the potato collecting hopper 51 is in an open state, the separated large potatoes directly enter the unloading unit 52 through the potato collecting hopper 51, when the potatoes are filled in the unloading unit 52 and need to be packed, the first plate body and the second plate body are rotated to a horizontal state, the bottom of the potato collecting hopper 51 is blocked by the first plate body and the second plate body, the operation of the potato combine harvester does not need to be stopped, the large potatoes separated by the sorting table 40 are collected and stored in the potato collecting hopper 51, the first plate body and the second plate body are rotated to a vertical state after the packed potatoes are unloaded, the bottom of the potato collecting hopper 51 is in an open state, the packing operation is continued, and the working efficiency is improved.

In some embodiments, referring to fig. 4, the unloading unit 52 includes a chute frame 521, a first hydraulic cylinder 523, a second hydraulic cylinder 524, a lifting platform 522, a baling unloading bucket 525, and a collection bag. The sliding frame 521 is fixedly installed on the frame 10. The first hydraulic cylinders 523 are arranged in parallel in two groups, the fixed ends of the two groups of first hydraulic cylinders 523 are connected with the slide way frame 521, the movable ends of the two groups of first hydraulic cylinders 523 are connected with the lifting platform 522, the lifting platform 522 is provided with pulleys 526, the lifting platform 522 is arranged on the slide way frame 521 in a sliding mode along the vertical direction, and the two groups of first hydraulic cylinders 523 work synchronously, so that the lifting platform 522 is lifted along the vertical direction.

Packing uninstallation fill 525 is located the downside that collection potato fought 51, and packing uninstallation fill 525 upper end opening collects the bag and is located packing uninstallation fill 525, and the expansion end of second hydraulic cylinder 524 is articulated with packing uninstallation fill 525, and the stiff end of second hydraulic cylinder 524 links to each other with elevating platform 522 to the every single move rotation that the packing was uninstalled and is fought is realized.

In this embodiment, the collecting bag is located in the packing and unloading bucket 525, and the packing and unloading bucket 525 is located below the potato collecting bucket 51, so that the potatoes in the potato collecting bucket 51 fall into the collecting bag to complete the packing of the potatoes. And starting the first hydraulic cylinder 523, driving the lifting platform 522 to descend by the first hydraulic cylinder 523, and then starting the second hydraulic cylinder 524 to rotate the packing and unloading bucket 525 to unload the packed potatoes.

In some embodiments, referring to FIG. 1, A-A is the front-back direction of the rack 10, B-B is the up-down direction of the rack 10, and the left-right direction of the rack 10 is perpendicular to the front-back direction of the rack 10 and the up-down direction of the rack 10. The digging mechanism 20 is positioned in front of the frame 10, the first conveying unit 31 is adjacent to the digging mechanism 20 and positioned behind the digging mechanism 20, the first conveying unit 31 is arranged along the front-back direction of the frame 10, potatoes dug out by the digging mechanism 20 are conveyed to a first power roller through the first conveying unit 31, the first power roller is positioned behind the first conveying unit 31, the first power roller is arranged in parallel with the first conveying unit 31, the potato seedling separating mechanism 30 conveys the separated potatoes to a second conveying unit 61, the second conveying unit 61 is arranged along the left-right direction of the frame 10, the second conveying unit 61 conveys the potatoes to a third conveying unit 62, the third conveying unit 62 comprises two parts, the first part of the third conveying unit 62 is positioned at the right side of the frame 10 and arranged along the front-back direction of the frame 10, and the third conveying unit 62 is arranged at an angle with the front-back direction of the frame 10, a second portion of the third conveying unit 62 is located above the frame 10 and is disposed in the left-right direction of the frame 10, the third conveying unit 62 conveys potatoes from the second conveying unit 62 to the sorting deck 40 located above the frame 10, the sorting deck 40 is located in the front-rear direction of the frame 10 and is located on the left side of the frame 10, the first unloading mechanism 50 is located at the rear portion of the sorting deck 40, the sorting power roller 42 conveys the screened large potatoes to the first unloading mechanism 50, the first unloading mechanism 50 bales and unloads the large potatoes, the small potato conveying unit 43 is located below the sorting power roller 42, the small potatoes screened by the sorting power roller 42 are conveyed to the second unloading mechanism by the small potato conveying unit 43, and the second unloading mechanism is located on the left side of the frame 10 and is connected to the small potato conveying unit 43 for baling and unloading the small potatoes.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A potato combine harvester, comprising:

a frame;

2. A potato combine harvester according to claim 1, characterised in that the potato vine separating mechanism comprises a first powered roller mounted on the frame, a second powered roller mounted on the frame and a first transfer unit mounted on the frame and for transferring excavated potatoes and potato vine to the second powered roller; the first power roller comprises a first roller body rotationally arranged on the rack, the second power roller comprises a second roller body rotationally arranged on the rack, the first roller body is positioned between the first conveying unit and the second roller body, and the first roller body and the second roller body are arranged at intervals; the periphery of the second roller body is provided with a plurality of first convex thorns which are arranged at intervals along the axial direction of the second roller body, and the first convex thorns comprise a plurality of first convex thorns which are annularly distributed on the periphery of the second roller body and used for hooking and puncturing the potato seedlings; the rotation of the first roller body is used for continuing the conveying trend of the potatoes and the potato seedlings on the first conveying unit, and the rotation direction of the second roller body is opposite to that of the first roller body so as to separate the potato seedlings from the potatoes.

3. A potato combine harvester according to claim 2, further comprising conveying means for conveying potatoes separated from the potato seedling separating means to the sorting deck;

4. A potato combine harvester according to claim 3, wherein the conveyor mechanism further comprises a third conveyor unit for taking potatoes from the fourth powered roller and conveying the potatoes to the sorting deck.

5. A potato combine harvester according to any one of claims 1 to 4, characterised in that the sorting deck comprises a sorting deck frame secured to the frame, a plurality of sorting power rollers spaced apart on the sorting deck frame for conveying large potatoes to the first loading and unloading mechanism, and a small potato transfer unit located below the sorting power rollers for receiving and conveying small potatoes to the second loading and unloading mechanism.

6. A potato combine harvester according to claim 5, wherein the power roller comprises a power roller body rotatably mounted on the frame of the sorting platform, the power roller body having a plurality of protrusions axially disposed along the power roller body on its outer periphery.

7. The potato combine harvester of claim 6, wherein the protrusions are spherical structures.

8. A potato combine harvester according to claim 6, wherein the first handling mechanism comprises a potato hopper mounted on the frame for collecting potatoes and an unloading unit mounted on the frame for bagging and unloading potatoes collected by the potato hopper.

9. The potato combine harvester of claim 8, wherein the unloading unit comprises a chute frame fixed to the frame, a first hydraulic cylinder, a second hydraulic cylinder, a lifting platform slidably disposed on the chute frame in a vertical direction, a baling and unloading hopper located on a lower side of the gathering hopper, and a collection bag located in the baling and unloading hopper; the packing and unloading hopper is arranged on the lifting platform in a pitching rotating manner, and the upper end of the packing and unloading hopper is opened; the fixed end of the first hydraulic cylinder is connected with the slideway frame, and the movable end of the first hydraulic cylinder is connected with the lifting platform so as to realize the lifting of the lifting platform; the fixed end of the second hydraulic cylinder is connected with the lifting platform, and the movable end of the second hydraulic cylinder is hinged with the packing and unloading bucket, so that the packing and unloading bucket can rotate in a pitching mode.