Ear picking plate structure, ear picking device and corn harvester

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an ear picking plate structure, an ear picking device and a corn harvester. The ear picking plate structure comprises the power piece, the first ear picking plate and the second ear picking plate, the first ear picking plate and the second ear picking plate are oppositely arranged, a first ear picking plate connecting portion, a first rotating axis and a first driving portion of a first rotating arm are sequentially arranged, and a second rotating axis, a second ear picking plate connecting portion and a second driving portion of a second rotating arm are sequentially arranged. According to the ear picking plate, the distance between the two ear picking plates can be adjusted by connecting the ear picking plates with the ear picking plate connecting parts of different rotating arms, the structure is relatively simple, maintenance is easier and more convenient, and then operation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to an ear picking plate structure, an ear picking device and a corn harvester. Background Art

[0002] In a corn harvester, the function of the two ear picking plates is to catch the corn ears in the gap and pick them off during the process of pulling the stems. Due to the different varieties and growth of corn ears, it is necessary to adjust the gap between the two ear picking plates in time according to the requirements of the on-site harvesting operation. In the existing corn harvester, the structure for adjusting the gap between the two ear picking plates is relatively complicated, which is not convenient for maintenance and affects work efficiency.

[0003] Therefore, a kind of ear picking plate structure is needed urgently to solve the above-mentioned technical problems. Utility Model Content

[0004] The utility model aims to provide an ear picking plate structure with a simple structure, which is convenient for maintenance.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provided is a spike picking plate structure, comprising:

[0007] A first ear picking plate and a second ear picking plate are arranged opposite to each other, and the first ear picking plate and the second ear picking plate can move along a first direction to approach or move away from each other;

[0008] Power parts;

[0009] 14. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 13, wherein the first and second rotating arms are arranged opposite to each other, and the first rotating arm is capable of rotating about a first rotating axis, and the second rotating arm is capable of rotating about a second rotating axis, the first rotating axis and the second rotating axis are parallel to each other, and the first rotating axis is perpendicular to the first direction, the first rotating arm comprises a first ear-picking plate connecting portion and a first driving portion, the second rotating arm comprises a second ear-picking plate connecting portion and a second driving portion, the first ear-picking plate connecting portion is movably connected to the first ear-picking plate, and the second ear-picking plate connecting portion is movably connected to the second ear-picking plate, the first driving portion and the second driving portion are respectively transmission-connected to the power piece, the first rotating axis of the first rotating arm is located between the first ear-picking plate connecting portion and the first driving portion, and the second ear-picking plate connecting portion of the second rotating arm is located between the second rotating axis and the second driving portion, and the power piece can drive the first rotating arm and the second rotating arm to rotate synchronously so that the first ear-picking plate and the second ear-picking plate are close to or away from each other along the first direction.

[0010] As a preferred technical solution of the above-mentioned ear-picking plate structure, one of the first ear-picking plate connecting portion and the first ear-picking plate is provided with a first elongated hole, and the other is provided with a pin shaft, and the pin shaft is inserted into the first elongated hole to enable the first rotating arm to be slidably connected to the first ear-picking plate, and / or,

[0011] One of the second ear-picking plate connecting portion and the second ear-picking plate is provided with a second elongated hole, and the other is provided with a pin shaft, which is inserted into the second elongated hole to enable the second rotating arm to be slidably connected to the second ear-picking plate.

[0012] As a preferred technical solution of the above-mentioned ear-picking plate structure, the ear-picking plate structure also includes a transmission rod, which is movably connected to the first driving part of the first rotating arm and the second driving part of the second rotating arm respectively, and the output end of the power part is fixedly connected to the transmission rod to drive the transmission rod to move.

[0013] As a preferred technical solution of the above-mentioned ear-picking plate structure, one of the first driving part and the transmission rod is provided with a third elongated hole, and the other is provided with a first slider, and the first slider is inserted into the third elongated hole to make the first rotating arm slidably connected to the transmission rod; and / or,

[0014] One of the second driving part and the transmission rod is provided with a fourth elongated hole, and the other is provided with a second sliding block, and the second sliding block is inserted into the fourth elongated hole so that the second rotating arm is slidably connected to the transmission rod.

[0015] As a preferred technical solution of the above-mentioned ear-picking plate structure, when the distance between the first ear-picking plate and the second ear-picking plate is the smallest or the largest, one of the first rotating arm and the second rotating arm is arranged perpendicular to the transmission rod, and the other is arranged at an acute angle to the transmission rod, wherein the angle of the acute angle is a.

[0016] As a preferred technical solution of the above-mentioned ear-picking plate structure, the value of a is 10-20°.

[0017] As a preferred technical solution of the above ear-picking plate structure, the ear-picking plate structure further includes a connecting arm;

[0018] The ear-picking plate structure further includes a first rotating shaft, the first rotating shaft is fixedly arranged relative to the first rotating arm, and the first rotating arm can rotate around a first rotating axis of the first rotating shaft, the connecting arm is fixedly connected to the first rotating shaft, the connecting arm is movably connected to the first ear-picking plate, and / or,

[0019] The ear-picking plate structure also includes a second rotating shaft, which is fixed relative to the second rotating arm, and the second rotating arm can rotate around the second rotating axis of the second rotating shaft. The connecting arm is fixedly connected to the second rotating shaft, and the connecting arm is movably connected to the second ear-picking plate.

[0020] As a preferred technical solution of the above-mentioned ear-picking plate structure, one of the connecting arm and the first ear-picking plate is provided with a fifth elongated hole, and the other is provided with a pin, and the pin is inserted into the fifth elongated hole to enable the connecting arm to be slidably connected with the first ear-picking plate; and / or,

[0021] One of the connecting arm and the second ear-picking plate is provided with a fifth elongated hole, and the other is provided with a pin shaft, and the pin shaft is inserted into the fifth elongated hole to enable the connecting arm to be slidably connected with the second ear-picking plate.

[0022] The utility model also provides an ear picking device, comprising the ear picking plate structure described in any one of the above schemes.

[0023] The utility model also provides a corn harvester, comprising a machine body and the ear picking device described in the above scheme, wherein the ear picking device is connected to the machine body.

[0024] The utility model has at least the following beneficial effects:

[0025] The ear-picking plate structure provided by the utility model includes a power piece, a first ear-picking plate and a second ear-picking plate arranged opposite to each other, the first rotation axis of the first rotating arm is located between the first ear-picking plate connecting part and the first driving part, the second ear-picking plate connecting part of the second rotating arm is located between the second rotation axis and the second driving part, the first ear-picking plate connecting part is movably connected to the first ear-picking plate, and the second ear-picking plate connecting part is movably connected to the second ear-picking plate. In this way, the first rotating arm and the second rotating arm can move under the action of the power piece, so that the first ear-picking plate and the second ear-picking plate arranged opposite to each other can be synchronously approached or moved away. Compared with the prior art, the ear-picking plate provided by the utility model can adjust the distance between the two ear-picking plates by connecting with the ear-picking plate connecting parts of different rotating arms. The structure is relatively simple, so maintenance is easier, and working efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of an ear picking plate structure provided in an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of one of the rocker arm assemblies provided in an embodiment of the utility model;

[0029] Figure 3 A front view of another rocker arm assembly provided by an embodiment of the utility model;

[0030] Figure 4 An exploded view of the ear picking plate structure provided in an embodiment of the utility model.

[0031] In the figure:

[0032] 11. First ear-picking plate; 12. Second ear-picking plate; 21. First rotating arm; 211. First ear-picking plate connecting part; 212. First driving part; 22. Second rotating arm; 221. Second ear-picking plate connecting part; 222. Second driving part; 23. First long strip hole; 24. Second long strip hole; 25. Third long strip hole; 26. Fourth long strip hole; 27. First rotating shaft; 28. Second rotating shaft; 3. Power part; 31. Connecting block; 4. Transmission rod; 41. First sliding block; 42. Second sliding block; 5. Connecting plate; 6. Connecting arm; 61. Fifth long strip hole; 7. Frame; 8. Pin shaft. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] The existing ear picking board has a complex structure and takes a long time to repair after being damaged, which affects the work efficiency.

[0038] To this end, the utility model provides an ear-picking board structure, which has a simple structure, is easy to maintain and can improve work efficiency.

[0039] like Figure 1-Figure 4As shown, the ear-picking plate structure includes a power member 3, a first ear-picking plate 11 and a second ear-picking plate 12 arranged opposite to each other, and a first rotating arm 21 and a second rotating arm 22 arranged opposite to each other. The first ear-picking plate 11 and the second ear-picking plate 12 can move along a first direction to approach or move away from each other. The other end of the first rotating arm 21 can rotate around a first rotating axis, and the other end of the second rotating arm 22 can rotate around a second rotating axis. The first rotating axis and the second rotating axis are parallel to each other, and the first rotating axis is perpendicular to the first direction. The first rotating arm 21 has a first ear-picking plate connecting portion 211 and a first driving portion 212, and the second rotating arm 22 has a second ear-picking plate connecting portion 221 And the second driving part 222, the first ear-picking plate connecting part 211 is movably connected to the first ear-picking plate 11, the second ear-picking plate connecting part 221 is movably connected to the second ear-picking plate 12, the first driving part 212 and the second driving part 222 are respectively transmission-connected to the power piece 3, the first rotation axis of the first rotating arm 21 is located between the first ear-picking plate connecting part 211 and the first driving part 212, the second ear-picking plate connecting part 221 of the second rotating arm 22 is located between the second rotation axis and the second driving part 222, the power piece 3 can drive the first rotating arm 21 and the second rotating arm 22 to rotate synchronously so that the first ear-picking plate 11 and the second ear-picking plate 12 are close to or away from each other along the first direction.

[0040] The ear-picking plate structure provided by the utility model includes a power piece 3, a first ear-picking plate 11 and a second ear-picking plate 12 arranged oppositely, the first rotation axis of the first rotating arm 21 is located between the first ear-picking plate connecting part 211 and the first driving part 212, and the second ear-picking plate connecting part 221 of the second rotating arm 22 is located between the second rotation axis and the second driving part 222, the first ear-picking plate connecting part 211 is movably connected to the first ear-picking plate 11, and the second ear-picking plate connecting part 221 is movably connected to the second ear-picking plate 12. In this way, the first rotating arm 21 and the second rotating arm 22 can move under the action of the power piece 3, so that the first ear-picking plate 11 and the second ear-picking plate 12 arranged oppositely can be synchronously approached or moved away. Compared with the prior art, the ear-picking plate provided by the utility model can adjust the distance between the two ear-picking plates by connecting with the ear-picking plate connecting parts of different rotating arms, and the structure is relatively simple, so maintenance is easier, and thus working efficiency can be improved.

[0041] Specifically, one of the first ear-picking plate connecting portion 211 and the first ear-picking plate 11 is provided with a first elongated hole 23, and the other is provided with a pin shaft 8, which is inserted into the first elongated hole 23, so that the first rotating arm 21 is slidably connected to the first ear-picking plate 11.

[0042] In some embodiments, one of the second ear-picking plate connecting portion 221 and the second ear-picking plate 12 is provided with a second long strip hole 24, and the other is provided with a pin shaft 8, and the pin shaft 8 is inserted into the second long strip hole 24, so that the second rotating arm 22 is slidably connected to the second ear-picking plate 12. It should be noted that the length direction of the first long strip hole 23 is in the same direction as the length direction of the first rotating arm 21, and the length direction of the second long strip hole 24 is in the same direction as the length direction of the second rotating arm 22, so that when the first rotating arm 21 and the second rotating arm 22 rotate, the first ear-picking plate 11 and the second ear-picking plate 12 can be driven to move along the first direction, thereby realizing the opening and closing between the first ear-picking plate 11 and the second ear-picking plate 12.

[0043] In order to ensure that the first ear-picking plate 11 and the second ear-picking plate 12 can be synchronously approached or moved away, in some embodiments, the ear-picking plate structure also includes a transmission rod 4, and a transmission rod 4 is movably connected to the first driving part 212 of the first rotating arm 21 and the second driving part 222 of the second rotating arm 22, respectively, and the output end of the power member 3 is fixedly connected to the transmission rod 4 to drive the transmission rod 4 to move along the axial direction of the transmission rod 4. In this way, when the transmission rod 4 moves along the axial direction of the transmission rod 4, it can simultaneously drive the first rotating arm 21 and the second rotating arm 22 to move, so that the first rotating arm 21 and the second rotating arm 22 can be synchronously approached or moved away through the mechanical structure. Compared with the setting of two transmission rods 4 and two power members 3, the control strategy is also simpler, which further saves R&D and production costs.

[0044] It should be noted that in this embodiment, the main body of the power member 3 is fixedly arranged, and can be specifically fixed on the body of the corn harvester. Exemplarily, the power member 3 is a driving cylinder, a pneumatic cylinder or an electric cylinder. Taking the power member 3 as an example of a driving cylinder, the cylinder rod of the driving cylinder is fixedly connected to the transmission rod 4 through a connecting block 31, and the connecting block 31 is provided with a connecting hole or a connecting groove. One end of the transmission rod 4 passes through the connecting hole or the connecting groove of the connecting block 31 and is fixedly connected to the connecting block 31. When the cylinder rod is extended or retracted, the transmission rod 4 can move along the axial direction of the transmission rod 4.

[0045] In some embodiments, Figure 4As shown, in order to ensure the relative sliding between the transmission rod 4 and the first rotating arm 21 and the second rotating arm 22, one of the first driving portion 212 of the first rotating arm 21 and the transmission rod 4 is provided with a third elongated hole 25, and the other is provided with a first slider 41, which is inserted into the third elongated hole 25, so that the first rotating arm 21 is slidably connected to the transmission rod 4. One of the second driving portion 222 and the transmission rod 4 is provided with a fourth elongated hole 26, and the other is provided with a second slider 42, which is inserted into the fourth elongated hole 26, so that the second rotating arm 22 is slidably connected to the transmission rod 4. In this embodiment, a third elongated hole 25 is provided at one end of the first rotating arm 21 connected to the transmission rod 4, and the length of the third elongated hole 25 extends along the length direction of the first rotating arm 21. The second driving portion 222 of the second rotating arm 22 is provided with a fourth elongated hole 26, that is, a fourth elongated hole 26 is provided at one end of the second rotating arm 22 connected to the transmission rod 4, and the length of the third elongated hole 25 extends along the length direction of the second rotating arm 22. The transmission rod 4 is provided with a first slider 41 and a second slider 42 at intervals, and the first slider 41 and the second slider 42 are respectively fixedly connected to the transmission rod 4, the first slider 41 is slidably connected to the first rotating arm 21 through the third elongated hole 25, and the second slider 42 is slidably connected to the second rotating arm 22 through the fourth elongated hole 26, so that the transmission rod 4 can drive the first slider 41 and the second slider 42 to move synchronously, thereby ensuring the synchronous sliding action with the first rotating arm 21 and the second rotating arm 22.

[0046] Since the clearance between the ear picking plates has a minimum design requirement, in some embodiments, Figure 1 and Figure 3 As shown, when the first ear-picking plate 11 and the second ear-picking plate 12 are at the minimum or maximum spacing, one of the first rotating arm 21 and the second rotating arm 22 is arranged perpendicular to the transmission rod 4, and the other is arranged at an acute angle to the transmission rod 4, and the acute angle is angle a. Figure 1 As shown, the first rotating arm 21 is arranged at an acute angle with the transmission rod 4, and the second rotating arm 22 is arranged perpendicular to the transmission rod 4. In this way, the first rotating arm 21 and the second rotating arm 22 cooperate to limit the size of the gap of the ear picking plate, so as to avoid the gap of the ear picking plate being too large or too small to affect the ear picking effect. Wherein a is 10°-20°, and illustratively, a is 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19° or 20°, and in this embodiment, 15° can be selected as the inclination angle.

[0047] In some embodiments, the first rotating arm 21 and the second rotating arm 22 are bent, so that the ear picking plate can avoid direct interference with other structures. Exemplarily, the first rotating arm 21 and the second rotating arm 22 are integrally formed structures, which is convenient for processing and manufacturing, saving processing time and cost, and at the same time improving the rigidity of the first rotating arm 21 and the second rotating arm 22, avoiding stress concentration and fracture at the connection between the first rotating arm 21 and the second rotating arm 22.

[0048] In some embodiments, the ear-picking plate structure further includes a connecting arm 6, a first rotating shaft 27 and a second rotating shaft 28, wherein the first rotating shaft 27 is fixedly arranged relative to the first rotating arm 21, the connecting arm 6 is fixedly connected to the first rotating shaft 27, and the connecting arm 6 is also movably connected to the first ear-picking plate 11, specifically a sliding connection. The second rotating shaft 28 is fixedly connected to the connecting arm 6, and the connecting arm 6 is also movably connected to the second ear-picking plate 12, specifically also a sliding connection.

[0049] In some embodiments, one of the connecting arm 6 and the first ear picking plate 11 is provided with a fifth elongated hole 61, and the other is provided with a pin 8, and the pin 8 is inserted into the fifth elongated hole 61, so that the connecting arm 6 is slidably connected to the first ear picking plate 11. The first rotating arm 21 can rotate around the first rotating axis of the first rotating shaft 27.

[0050] One of the connecting arm 6 and the second ear-picking plate 12 is provided with a fifth elongated hole 61, and the other is provided with a pin 8, which is inserted into the fifth elongated hole 61, so that the connecting arm 6 is slidably connected to the second ear-picking plate 12. The second rotating arm 22 can rotate around the second rotating axis of the second rotating shaft 28.

[0051] In order to ensure that the first rotating shaft 27 and the second rotating shaft 28 can be relatively fixed, the ear picking plate structure in this embodiment also includes a frame 7, and the first rotating shaft 27 and the second rotating shaft 28 can be rotatably connected to the frame 7 to prevent the corresponding rotating shaft from moving when the rotating arm rotates.

[0052] In some embodiments, the first ear-picking plate 11 and the second ear-picking plate 12 are both provided with a connecting plate 5 on the side away from each other, the first rotating shaft 27 and the second rotating shaft 28 are both connected with a connecting arm 6, the connecting arm 6 is provided with a fifth long strip hole 61, the first ear-picking plate 11 is slidably connected to the fifth long strip hole 61 through the pin shaft 8, and the second ear-picking plate 12 is slidably connected to the second rotating arm 22 and the connecting arm 6 through the pin shaft 8. In this way, it can be ensured that the first ear-picking plate 11 and the second ear-picking plate 12 can be stably arranged, and a large vibration amplitude will not be generated due to mechanical vibration, thereby ensuring stable operation during the ear-picking process.

[0053] In some embodiments, Figure 4As shown, each ear picking board is provided with two spaced connecting plates 5. A groove is formed between the two connecting plates 5. When corn is harvested, the stalks can leak out of the ear picking board structure through the groove, so as to avoid the stalks from accumulating on the ear picking board structure and requiring manual cleaning. The connecting plate 5 connected to the second rotating shaft 28 is bent downward to achieve connection with the second rotating arm 22. The specific structure of the ear picking board is prior art and will not be described in detail here.

[0054] The utility model also provides an ear picking device, which comprises the adjustable ear picking plate structure provided in the embodiment of the utility model.

[0055] Since the ear-picking plate structure is included, the ear-picking device of the embodiment of the utility model has all the advantages and beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0056] The utility model also provides a corn harvester, which comprises a machine body and an ear picking device provided in an embodiment of the utility model, wherein the ear picking device is connected to the machine body. Specifically, a frame 7 is fixedly connected to the machine body.

[0057] Since the above-mentioned ear picking device is included, the corn harvester of the embodiment of the utility model has all the advantages and beneficial effects of the above-mentioned embodiments, which will not be described in detail here.

[0058] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The ear picking plate structure is characterized by: include: A first ear picking plate (11) and a second ear picking plate (12) are arranged opposite to each other, and the first ear picking plate (11) and the second ear picking plate (12) can move along a first direction to approach or move away from each other; Power parts (3); Two first rotating arms (21) and second rotating arms (22) are arranged opposite to each other, the first rotating arm (21) can rotate around a first rotating axis, the second rotating arm (22) can rotate around a second rotating axis, the first rotating axis and the second rotating axis are parallel to each other, the first rotating axis and the first direction are perpendicular to each other, the first rotating arm (21) has a first ear-picking plate connecting portion (211) and a first driving portion (212), the second rotating arm (22) has a second ear-picking plate connecting portion (221) and a second driving portion (222), the first ear-picking plate connecting portion (211) is movably connected to the first ear-picking plate (11), and the second ear-picking plate connecting portion (221) is movably connected to the first ear-picking plate (11), and the second ear-picking plate connecting portion (221) is movably connected to the first ear-picking plate (11). The first driving part (212) and the second driving part (222) are respectively connected to the power piece (3); the first rotation axis of the first rotating arm (21) is located between the first ear-picking plate connecting part (211) and the first driving part (212); the second ear-picking plate connecting part (221) of the second rotating arm (22) is located between the second rotation axis and the second driving part (222); the power piece (3) can drive the first rotating arm (21) and the second rotating arm (22) to rotate synchronously so that the first ear-picking plate (11) and the second ear-picking plate (12) are moved closer to or farther away from each other along the first direction.

2. The ear picking plate structure according to claim 1, characterized in that: One of the first ear-picking plate connecting portion (211) and the first ear-picking plate (11) is provided with a first elongated hole (23), and the other is provided with a pin shaft, the pin shaft being inserted into the first elongated hole (23) so that the first rotating arm (21) is slidably connected to the first ear-picking plate (11), and / or, One of the second ear-picking plate connecting portion (221) and the second ear-picking plate (12) is provided with a second elongated hole (24), and the other is provided with a pin shaft, and the pin shaft is inserted into the second elongated hole (24) so ​​that the second rotating arm (22) and the second ear-picking plate (12) are slidably connected.

3. The ear picking plate structure according to claim 1, characterized in that: The ear-picking plate structure also includes a transmission rod (4), wherein the transmission rod (4) is movably connected to the first driving part (212) of the first rotating arm (21) and the second driving part (222) of the second rotating arm (22), respectively, and the output end of the power member (3) is fixedly connected to the transmission rod (4) to drive the transmission rod (4) to move.

4. The ear picking plate structure according to claim 3, characterized in that: One of the first driving part (212) and the transmission rod (4) is provided with a third elongated hole (25), and the other is provided with a first sliding block (41), and the first sliding block (41) is inserted into the third elongated hole (25) so that the first rotating arm (21) and the transmission rod (4) are slidably connected; and / or, One of the second driving part (222) and the transmission rod (4) is provided with a fourth elongated hole (26), and the other is provided with a second sliding block (42), and the second sliding block (42) is inserted into the fourth elongated hole (26) so that the second rotating arm (22) and the transmission rod (4) are slidably connected.

5. The ear picking plate structure according to claim 3, characterized in that: When the first ear-picking plate (11) and the second ear-picking plate (12) are at a minimum or maximum spacing, one of the first rotating arm (21) and the second rotating arm (22) is arranged perpendicularly to the transmission rod (4), and the other is arranged at an acute angle to the transmission rod (4), wherein the angle of the acute angle is a.

6. The ear picking plate structure according to claim 5, characterized in that: The value of a is 10-20°.

7. The ear picking plate structure according to claim 1, characterized in that: The ear picking plate structure also includes a connecting arm (6); The ear-picking plate structure further comprises a first rotating shaft (27), the first rotating shaft (27) is fixedly arranged relative to the first rotating arm (21), and the first rotating arm (21) can rotate around a first rotating axis of the first rotating shaft (27), the connecting arm (6) is fixedly connected to the first rotating shaft (27), the connecting arm (6) is movably connected to the first ear-picking plate (11), and / or, The ear-picking plate structure also includes a second rotating shaft (28), the second rotating shaft (28) is fixedly arranged relative to the second rotating arm (22), and the second rotating arm (22) can rotate around a second rotating axis of the second rotating shaft (28), the connecting arm (6) is fixedly connected to the second rotating shaft (28), and the connecting arm (6) is movably connected to the second ear-picking plate (12).

8. The ear picking plate structure according to claim 7, characterized in that: One of the connecting arm (6) and the first ear-picking plate (11) is provided with a fifth elongated hole (61), and the other is provided with a pin shaft (8), and the pin shaft (8) is inserted into the fifth elongated hole (61) so that the connecting arm (6) and the first ear-picking plate (11) are slidably connected; and / or, One of the connecting arm (6) and the second ear-picking plate (12) is provided with a fifth elongated hole (61), and the other is provided with a pin shaft (8), and the pin shaft (8) is inserted into the fifth elongated hole (61) so that the connecting arm (6) and the second ear-picking plate (12) are slidably connected.

9. The ear picking device is characterized by: It comprises the ear picking board structure as described in any one of claims 1 to 8.

10. A corn harvester, characterized in that: It comprises a machine body and the ear picking device as claimed in claim 9, wherein the ear picking device is connected to the machine body.

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