A corn combine and a corn ear picking device thereof

Abstract

This invention discloses a corn combine harvester and its corn ear-picking device. The corn ear-picking device includes a frame, a reeling mechanism, an ear-picking mechanism, and a flexible protective structure. The ear-picking mechanism has ear-picking plates, an adaptive adjustment structure, and a floating adjustment structure for adjusting the height of each ear-picking plate. The floating adjustment structure is mounted on the frame below the ear-picking plates, and the ear-picking plates are connected to the frame via the adaptive adjustment structure. In this invention, all ear-picking plates are connected to the frame via the adaptive adjustment structure, allowing for real-time adjustment of the spacing between the ear-picking plates. This not only reduces the corn's damage rate but also decreases the ear drop rate, reducing the amount of corn ears left in the field. During ear-picking, the flexible protective structure prevents rigid contact between the corn ears and the ear-picking plates, further reducing the corn damage rate. During ear-picking, the floating adjustment structure absorbs some of the collision energy, further preventing ear damage and kernel drop.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, and in particular to a corn ear-picking device, and also to a corn combine harvester incorporating the corn ear-picking device. Background Technology

[0002] The ear-picking principle of a corn combine harvester involves pulling the stalk downwards at high speed. Because the connecting force between the ear stalk and the corn ear is less than the breaking force of the stalk, and the diameter of the corn ear is larger than the diameter of the stalk, the ear is then forcibly squeezed to separate from the stalk. Based on this ear-picking principle, it is known that most damage and loss of corn kernels occurs during the ear-picking stage. For corn combine harvesters, the ear-picking header is the first mechanical component to contact the corn ear; therefore, improvements to the ear-picking header are of great significance for minimizing corn harvesting losses.

[0003] There are two main types of existing ear-picking headers. The first type is the ear-picking roller header. Although this structure can peel the corn ears, the corn ears are severely damaged due to direct contact with the high-speed rotating ear-picking roller, resulting in a high damage rate. The second type is the ear-picking header with a combination of ear-picking plate and stalk-pulling roller. While this type of header avoids direct contact between the corn ears and the high-speed rotating ear-picking roller, the rigid contact between the high-speed pulled-down corn ears and the ear-picking plate still leads to severe ear damage and kernel loss. In addition, the gap between the ear-picking plates is not adjustable during harvesting. When the gap is too small, the stalk is easily broken, and a large amount of corn leaves and stalk fragments are mixed into the corn ears. When the gap is too large, the ear damage is aggravated.

[0004] Currently, there are headers on the market with adjustable picking plate gaps. However, the gap adjustment of these headers is mostly done manually in advance, and the gap remains fixed during harvesting. For example, CN116058165A discloses a picking plate adjustment mechanism where the operator adjusts the gap in advance. However, when encountering stalks with a large diameter span, smaller diameter stalks and corn ears may not be pulled down sufficiently, increasing the rate of damage, grain loss, and potential blockage.

[0005] In summary, it is crucial to address the technical issues of existing ear-picking cutters that combine ear-picking plates and stalk-pulling rollers, which cannot adjust the spacing of the ear-picking plates in real time during the ear-picking process, resulting in severe ear damage and excessive kernel loss. Summary of the Invention

[0006] In view of this, the first objective of the present invention is to provide a corn ear-picking device, and the second objective of the present invention is to provide a corn combine harvester that includes the corn ear-picking device described in the present invention.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The corn ear-picking device of the present invention includes a frame, a threshing mechanism and an ear-picking mechanism disposed on the frame, wherein the ear-picking mechanism is located below the threshing mechanism; the threshing mechanism has at least two threshing chains arranged at intervals and threshing teeth disposed on each threshing chain; it also includes a flexible protective structure horizontally disposed on each threshing chain; the ear-picking mechanism has at least a pair of ear-picking plates arranged at intervals on the frame, an adaptive adjustment structure for adjusting the spacing between the ear-picking plates, and a floating adjustment structure for adjusting the height of each ear-picking plate, wherein the floating adjustment structure is disposed on the frame located below the ear-picking plates.

[0009] The beneficial effects are as follows: Each ear-picking plate of this invention is connected to the frame through an adaptive adjustment structure. Therefore, the adaptive adjustment structure can adjust the spacing of the ear-picking plates in real time, which not only reduces the corn's damage rate but also reduces the rate of ear drop, thus reducing the amount of corn ears left in the field. This invention incorporates a flexible protective structure on the picking chain, which prevents rigid contact between the corn ears and the ear-picking plates during the ear-picking process, further reducing the corn damage rate, minimizing the loss of corn kernels from the ears, and preventing corn kernels from falling into the field. Furthermore, by mounting the ear-picking plates on a floating adjustment structure, this invention can absorb some of the collision energy during the ear-picking process, reducing the impact force at the moment of collision between the corn ears and the ear-picking plates, further preventing ear damage and kernel drop.

[0010] Preferably, the flexible protective structure includes a plurality of upper flexible brushes arranged circumferentially along the reeling chain, with each inner link of the reeling chain having a horizontally arranged upper flexible brush. In this invention, the upper flexible brushes are arranged circumferentially along the reeling chain, located on the outer side of the reeling chain and above the ear-picking plate, effectively preventing rigid contact between the corn ear and the ear-picking plate.

[0011] More preferably, the flexible protective structure further includes a plurality of lower flexible brushes arranged circumferentially along the reeling chain; the lower flexible brushes are horizontally arranged at the lower part of each inner link of the reeling chain. In this invention, two layers of flexible brushes are installed on the reeling chain, both located above the ear-picking plate, to avoid rigid collisions as much as possible, thereby reducing kernel loss caused by rigid collisions; on the other hand, the flexible brushes also have a double-layer blocking effect, preventing detached corn kernels from falling into the field.

[0012] Preferably, the floating adjustment structure includes an upper fixing member, a lower fixing member, and a floating spring fixed between the upper and lower fixing members. The upper fixing member is fixed to the lower surface of the ear-picking plate, and the lower fixing member is disposed on the top plate of the frame. In actual installation, the height difference between the ear-picking plate and the top plate of the frame is 20mm. When the corn ear acts on the ear-picking plate, the ear-picking plate can float slightly up and down under the action of the floating spring to buffer the instantaneous collision force between the corn ear and the ear-picking plate.

[0013] More preferably, the lower fixing member is a lower fixing cap with an upward opening, and the upper fixing member is an upper fixing cap with an upward opening. In this invention, both the upper and lower fixing members are fixing caps, which effectively ensures the elastic deformation of the floating spring in the vertical direction and has a limiting function.

[0014] Preferably, the ear-picking plate has a split structure, including an inlet ear-picking plate and at least one rear ear-picking plate, wherein the inlet ear-picking plate and at least one rear ear-picking plate are respectively connected to the frame through the adaptive adjustment structure. In actual installation, there may be one or two rear ear-picking plates.

[0015] The beneficial effects are as follows: Since there are always two or more corn plants in the gap between the ear-picking plates, the present invention designs the ear-picking plates into a split structure, and each split plate (i.e., the inlet ear-picking plate and the rear ear-picking plate) is connected to the frame through an adaptive adjustment structure. Therefore, during actual ear picking, the gap between each pair of inlet ear-picking plates can be adaptively adjusted, and the gap between each pair of rear ear-picking plates can also be adaptively adjusted, which improves the adaptability to stalks of different diameters and reduces the loss of ears caused by nibbling due to improper gaps and stalk breakage.

[0016] More preferably, each of the adaptive adjustment structures includes a first mounting shaft and at least one adaptive adjustment assembly. The first mounting shaft is horizontally disposed on the side plate of the frame. The adaptive adjustment assembly includes a connector hinged at its lower part to the first mounting shaft and a second mounting shaft hinged at its upper part to the connector. The inlet picking plate or the rear picking plate is fixedly connected to the second mounting shaft. The adaptive adjustment assembly also includes a picking plate reset unit disposed at the bottom of the connector. In actual installation, to ensure a reliable connection between the picking plate and the frame, both the inlet picking plate and the rear picking plate are connected to the frame through two or more adaptive adjustment assemblies.

[0017] The beneficial effects are: when the stalk enters the picking plate, the stalk applies force to the picking plate. Since the second mounting shaft of the picking plate is connected to the connector, and the first mounting shaft is also hinged to the connector, the picking plate can move outward under the external force applied by the stalk, thereby realizing the adaptive adjustment of the gap of the picking plate. The structure is simple and compact, easy to disassemble, and convenient for later maintenance.

[0018] The present invention installs a picking plate reset unit at the lower part of the connector. When the gap between the picking plates increases, the picking plate reset unit is in the force-bearing unit. After the external force disappears, the picking plate reset unit automatically resets the picking plate, so that the picking plate is in the initial position, thereby realizing the adaptive adjustment of the picking plate during the picking process and reducing nibbling and dropping of ears.

[0019] More preferably, the picking plate reset unit is horizontally positioned at the bottom of the connecting member, comprising a first shell and a second shell inserted together, and a reset spring disposed within the first shell and the second shell. An adjusting member is disposed on the first shell, extending into the cavity formed by the first shell and the second shell, and an adjusting plate is disposed at the inner end of the adjusting member. When the picking plate opens, the lower part of the connecting member rotates towards the side plate of the frame, the adjusting member abuts against the side plate, and the second shell moves towards the first shell, causing the reset spring to be under pressure. When the external force disappears, the reset spring automatically resets, thereby automatically resetting the picking plate.

[0020] Preferably, the picking ends of both the inlet picking plate and the rear picking plate are arc-shaped structures. The curvature of the arc-shaped structure is designed to mimic the corn cob, which effectively increases the contact area between the corn cob and the picking plate, reduces the force per unit area of ​​the corn cob during collision, reduces the impact force on individual kernels, and reduces kernel damage and loss.

[0021] The present invention also provides a corn combine harvester, including a corn ear-picking device; wherein, the corn ear-picking device includes a frame, a threshing mechanism and an ear-picking mechanism disposed on the frame, the ear-picking mechanism being located below the threshing mechanism; the threshing mechanism has at least two threshing chains spaced apart and threshing teeth disposed on each threshing chain; it also includes a flexible protective structure horizontally disposed on each threshing chain; the ear-picking mechanism has at least a pair of ear-picking plates spaced apart on the frame, an adaptive adjustment structure for adjusting the spacing between the ear-picking plates, and a floating adjustment structure for adjusting the height of each ear-picking plate, the floating adjustment structure being disposed on the frame located below the ear-picking plates.

[0022] The beneficial effects are as follows: Each ear-picking plate of this invention is connected to the frame through an adaptive adjustment structure. Therefore, the adaptive adjustment structure can adjust the spacing of the ear-picking plates in real time, which not only reduces the corn's damage rate but also reduces the rate of ear drop, thus reducing the amount of corn ears left in the field. This invention incorporates a flexible protective structure on the picking chain, which prevents rigid contact between the corn ears and the ear-picking plates during the ear-picking process, further reducing the corn damage rate, minimizing the loss of corn kernels from the ears, and preventing corn kernels from falling into the field. Furthermore, by mounting the ear-picking plates on a floating adjustment structure, this invention can absorb some of the collision energy during the ear-picking process, reducing the impact force at the moment of collision between the corn ears and the ear-picking plates, further preventing ear damage and kernel drop. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 yes Figure 1 Side view.

[0025] Figure 3This is a schematic diagram of the present invention omitting the reeling mechanism.

[0026] Figure 4 This is a schematic diagram of the adaptive adjustment structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the ear-picking plate reset unit of the present invention.

[0028] Figure 6 yes Figure 5 A schematic diagram of direction AA.

[0029] Figure 7 This is a schematic diagram of the floating adjustment structure in this invention.

[0030] Figure 8 This is a schematic diagram (top view) of the installation of the flexible protective structure on the reeling chain in this invention.

[0031] Figure 9 This is an isometric view of the installation of the flexible protective structure on one of the inner links of the present invention. Detailed Implementation

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0033] It should be noted that, in the description of this invention, relational terms such as “first” and “second” are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Combination Figure 1-4 As can be seen, the present invention proposes a corn ear-picking device, including a frame 100, a stalk-pulling mechanism and an ear-picking mechanism disposed on the frame 100, and a horizontally disposed flexible protective structure, wherein the ear-picking mechanism and the stalk-pulling mechanism are both installed on the frame 100 and located above the frame 100, and the ear-picking mechanism is located below the stalk-pulling mechanism.

[0036] The reeling mechanism has reeling chains 201 arranged at intervals and multiple reeling teeth 202 set on each reeling chain 201. Each reeling chain 201 is equipped with two reeling sprockets 203, and the axle 204 of the reeling sprockets 203 is fixed to the top plate of the frame 100.

[0037] The reeling chain 201 has alternating inner links 201a and outer links 201b (the outer links 201b connect the inner links 201a together); the flexible protective structure 300 includes a plurality of upper flexible brushes 301 arranged circumferentially along the reeling chain 201, and the upper flexible brushes 301 are horizontally arranged on the upper part of each inner link 201a of the reeling chain 201.

[0038] During the ear-picking process, the flexible brush 301 installed above the ear-picking board effectively prevents rigid contact between the corn ear and the ear-picking board, buffers the instantaneous collision force between the ear-picking board and the corn ear, further reduces the damage rate of the corn, minimizes the loss of corn kernels from the corn ear, and also prevents the corn kernels from falling into the field.

[0039] In a preferred embodiment of the present invention, the flexible protective structure further includes a plurality of lower flexible brushes 302 densely arranged circumferentially along the reeling chain 201, and each inner link 201a of the reeling chain 201 is provided with a lower flexible brush 302 at its lower part. In actual installation, a brush mounting frame is provided on the inner link 201a of the reeling chain 201. Taking the inner link 201a as an example: the brush mounting frame includes a vertical connecting plate 303 that fixes the two inner links of the inner link 201a together. The brush holder of the upper flexible brush 301 is fixed to the upper part of the vertical connecting plate 303, and the brush holder of the lower flexible brush 302 is fixed to the lower part of the vertical connecting plate 303. See details below. Figure 2 and Figure 8-9 In this embodiment, each picking chain 201 is provided with two layers of flexible brushes on its outer periphery to further buffer the instantaneous collision force between the picking plate and the corn ear, reduce the damage rate and threshing rate of the corn, and minimize the amount of corn kernels left in the field.

[0040] Combination Figure 3 It is known that the ear-picking mechanism includes a pair of ear-picking plates spaced apart, an adaptive adjustment structure for adjusting the gap between the ear-picking plates, and a floating adjustment structure 400 for adjusting the height of each ear-picking plate. The floating adjustment structure 400 is mounted on the frame 100 located below the ear-picking plates.

[0041] During the ear-picking process, the floating adjustment structure 400 can absorb some of the collision energy, so that the collision force between the corn ear and the ear-picking plate is minimized, thus avoiding corn ear damage and threshing. Each ear-picking plate is connected to the frame 100 through an adaptive adjustment structure, thereby adjusting the distance between the two ear-picking plates. This not only reduces the corn damage rate but also reduces the ear drop rate, thereby reducing the corn ear residue rate in the field.

[0042] Combination Figure 2-3 As shown in section 7, the ear-picking plate is located 20mm above the top plate of the frame 100. The floating adjustment structure 400 is located between the top plate and the ear-picking plate. It includes an upper fixing part (i.e., an upper fixing cap 401 with its opening facing downwards), a lower fixing part (i.e., a lower fixing cap 402 with its opening facing upwards), and a floating spring 403 fixed between the upper fixing cap 401 and the lower fixing cap 402. The upper fixing cap 401 is fixed to the lower surface of the ear-picking plate, and the lower fixing cap 402 is set on the upper surface of the top plate. When the corn ear acts on the ear-picking plate, the ear-picking plate can float slightly up and down under the action of the floating spring 403 to buffer the instantaneous collision force between the corn ear and the ear-picking plate, reducing nibbling and threshing. Among them, the floating spring 403 is installed on the upper fixing cap 401 and the lower fixing cap 402. The upper fixing cap 401 and the lower fixing cap 402 have a certain guiding and limiting function, effectively ensuring the up and down floating trajectory of the ear-picking plate.

[0043] Combination Figure 2 and Figure 3 It is understood that both ear-picking plates are of a split structure, including an inlet ear-picking plate 501 and a rear ear-picking plate 502. Each inlet ear-picking plate 501 is connected to the frame 100 through an adaptive adjustment structure. The two inlet ear-picking plates 501 are arranged opposite each other to ensure that the gap between the two inlet ear-picking plates 501 can be adaptively adjusted according to the diameter of the stalk. The inlet end of the inlet ear-picking plate 501 has an arc-shaped design to facilitate the passage of the stalk. Each rear ear-picking plate 502 is connected to the frame 100 through an adaptive adjustment structure. The two rear ear-picking plates 502 are arranged opposite each other to ensure that the gap between the two rear ear-picking plates 502 can be adaptively adjusted according to the diameter of the stalk. Since there are always two or more corn plants within the gap of the ear-picking plates, this invention designs the ear-picking plates as a split structure. The gaps between the inlet ear-picking plates 501 and the gaps between the rear ear-picking plates 502 can be adaptively adjusted, improving adaptability to stalks of different diameters and reducing ear loss caused by nibbling due to unsuitable gaps and stalk breakage.

[0044] In this invention, two identical adaptive adjustment structures are installed on each side plate of the frame 100. The installation method between the inlet picking plate 501 and the adaptive adjustment structure is the same as that between the rear picking plate 502 and the adaptive adjustment structure. Taking the installation method between the inlet picking plate 501 and the adaptive adjustment structure as an example: Figure 1-6It is known that the adaptive adjustment structure includes a first mounting shaft 503 and two adaptive adjustment components spaced apart on the first mounting shaft 503. The first mounting shaft 503 is horizontally mounted on the side plate of the frame 100. The adaptive adjustment components include a connector 504 hinged to the lower part of the first mounting shaft 503, a second mounting shaft 505 hinged to the upper part of the connector 504, and a picking plate reset unit 507 disposed at the bottom of the connector 504. The picking plate 501 is fixedly connected to the second mounting shaft 505.

[0045] In actual operation, when the diameter of the stem entering between the two picking plates 501 is greater than the initial gap, the stem applies an external force to the picking plate. Since the connecting piece 504 is rotatably engaged with the first mounting shaft 503, the second mounting shaft 505 can also rotate relative to the connecting piece 504, so that the picking plate can be finely adjusted outward, thereby realizing the adaptive adjustment of the gap between the picking plates. The structure is simple and compact, and convenient for later maintenance.

[0046] During the adaptive adjustment process, when the connector 504 rotates, it drives the bottom ear-picking plate reset unit 507 to rotate toward the side plate, and the ear-picking plate reset unit 507 is in an energy storage state; when the stem passes through, the external force on the guide ear-picking plate 501 disappears, and the ear-picking plate reset unit 507 causes the guide ear-picking plate 501 to automatically reset to the initial position, thereby realizing the adaptive adjustment of the ear-picking plate during the ear-picking process and reducing nibbling and ear drop.

[0047] Combination Figure 3 It is known that both the inlet picking plate 501 and the rear picking plate 502 have two connecting plates 508, and the two connecting plates 508 of the inlet picking plate 501 are fixedly connected to the second mounting shaft 505. In actual processing, the picking ends of both the inlet picking plate 501 and the rear picking plate 502 adopt an arc-shaped structure 506 designed to resemble a corn cob, increasing the contact area between the corn cob and the picking plate, reducing the force per unit area of ​​the corn cob, reducing the impact force on individual kernels, and reducing nibbling and threshing.

[0048] Combination Figure 1-6 It is understood that the picking plate reset unit 507 is horizontally positioned at the bottom of the connecting member 504, including a first shell 507a and a second shell 507b inserted together, and a reset spring 507c (preferably a reset compression spring) disposed within the first shell 507a and the second shell 507b. The first shell 507a and the second shell 507b form a cavity. An adjusting member (i.e., adjusting screw 507d) is horizontally disposed on the first shell 507a. The adjusting screw 507d extends into the cavity, and an adjusting plate 507e is fixedly connected to its inner end. One end of the reset spring 507c is fixed to the adjusting plate 507e, and its other end is fixed to the bottom of the second shell 507b. In actual use, the position of the adjusting plate 507e in the cavity is adjusted using the adjusting screw to facilitate adjustment of the initial state of the reset spring 507c.

[0049] During actual installation, the first shell 507a can move horizontally relative to the second shell 507b, that is, the first shell 507a and 507b are slidably inserted together, and the bottom of the second shell 507b abuts against the side plate of the frame 100. When the lower part of the connector 504 is subjected to force and rotates towards the side plate of the frame 100, the second shell 507b abuts against the side plate. The rotation of the connector 504 causes the open end of the second shell 507b to insert into the first shell 507a, so that the return spring 507c is in a compressed state (i.e., an energy-storing state). Once the external force on the picking plate disappears, the energy stored in the return spring 507c causes the connector 504 to automatically reset, thereby realizing the automatic reset of the picking plate.

[0050] In practical use, this invention is installed on the front header of a corn combine harvester (one, two, or two of these inventions can be installed). The specific ear-picking process and working principle are as follows:

[0051] During ear picking, the power provided by the corn combine harvester causes the picking chain 201 to rotate. As the picking chain 201 rotates, it drives the upper flexible brush 301 and the lower flexible brush 302 to rotate simultaneously. The picking teeth 202 on the picking chain 201 guide the stalk into the machine and move it backward. When the stalk enters the gap between the ear picking plates, the adaptive adjustment structure automatically adjusts the size of the gap between the ear picking plates to allow the stalk to pass through smoothly and avoid the corn ears being damaged and the stalks being broken due to the gap being too small.

[0052] During the downward pulling of the stalk roller in the corn combine harvester, the corn ear strikes the ear-picking plate. The floating adjustment structure below the ear-picking plate absorbs some of the collision energy by 400 degrees, reducing the collision force between the corn ear and the ear-picking plate, thereby reducing the corn ear damage rate and reducing threshing. When the stalk leaves the gap of the ear-picking plate, the adaptive adjustment structure resets the ear-picking plate to its initial state, improving adaptability.

[0053] During the ear-picking process, the upper flexible brush 301 and the lower flexible brush 302 are located above the ear-picking plate and are densely arranged, which has a buffering effect and avoids rigid contact between the corn ear and the ear-picking plate. In addition, the corn kernels that fall off the corn ear can be transported to the rear of the header for collection, realizing the collection of threshed kernels and reducing harvest losses.

[0054] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corn ear-picking device, comprising a frame, a threshing mechanism and an ear-picking mechanism mounted on the frame, wherein the ear-picking mechanism is located below the threshing mechanism; the threshing mechanism has at least two threshing chains spaced apart and threshing teeth mounted on each threshing chain; characterized in that: It also includes a flexible protective structure horizontally arranged on each of the picking chains; the ear-picking mechanism has at least a pair of ear-picking plates spaced apart on the frame, an adaptive adjustment structure for adjusting the spacing between the ear-picking plates, and a floating adjustment structure for adjusting the height of each ear-picking plate, the floating adjustment structure being arranged on the frame located below the ear-picking plates, the ear-picking plates being connected to the frame through the adaptive adjustment structure; The reeling chain has multiple inner links; the flexible protective structure includes multiple upper flexible brushes arranged circumferentially along the reeling chain, and each of the inner links of the reeling chain has the upper flexible brushes arranged horizontally on its upper part. The floating adjustment structure includes an upper fixing member, a lower fixing member, and a floating spring fixed between the upper fixing member and the lower fixing member. The upper fixing member is fixed to the lower surface of the ear-picking plate, and the lower fixing member is disposed on the top plate of the frame. The ear-picking plate is a split structure, including an inlet ear-picking plate and at least one rear ear-picking plate. The inlet ear-picking plate and at least one rear ear-picking plate are respectively connected to the frame through the adaptive adjustment structure. Each adaptive adjustment structure includes a first mounting shaft and at least one adaptive adjustment component. The first mounting shaft is horizontally arranged on the side plate of the frame. The adaptive adjustment component includes a connector hinged at the lower part to the first mounting shaft and a second mounting shaft hinged at the upper part of the connector. The inlet ear-picking plate or the rear ear-picking plate is fixedly connected to the second mounting shaft. The adaptive adjustment component also includes an ear-picking plate reset unit disposed at the bottom of the connector.

2. The corn ear-picking device according to claim 1, characterized in that: The flexible protective structure also includes multiple lower flexible brushes arranged circumferentially along the reeling chain; each of the inner links of the reeling chain has a lower flexible brush horizontally arranged at its lower part.

3. The corn ear-picking device according to claim 1, characterized in that: The lower fixing member is a lower fixing cap with an opening facing upwards, and the upper fixing member is an upper fixing cap with an opening facing upwards.

4. The corn ear-picking device according to claim 1, characterized in that: The bottom of the horizontally arranged connecting member of the picking plate reset unit includes a first shell and a second shell inserted together and a reset spring disposed in the first shell and the second shell. An adjustment member is disposed on the first shell, the adjustment member extends into the cavity enclosed by the first shell and the second shell, and an adjustment plate is disposed at the inner end of the adjustment member.

5. The corn ear-picking device according to claim 1, characterized in that: Both the inlet and outlet picking plates have arc-shaped picking ends.

6. A corn combine harvester, characterized in that: Includes the corn ear-picking device according to any one of claims 1-5.

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