A reel mechanism, a cutter bar comprising the same, and a corn harvester

Abstract

The present invention relates to a straw-pulling mechanism and a harvesting platform and corn harvester containing the same, comprising at least two conveying channels arranged side by side, with straw-pulling chains provided on both sides of each conveying channel. The conveying channels are divided into two groups with the gap between the two conveying channels as the boundary, or all are grouped together with the side ends of one side as the boundary. The straw-pulling chain on the side of each conveying channel close to the boundary is a driven chain, and the straw-pulling chain on the side away from the boundary is a driving chain. The driving chains extend from front to back along the corresponding conveying channels, with their rear ends used for power input. The driven chains are provided at the front ends of the corresponding conveying channels. Except for the driven chains at the boundary, the other driven chains are connected to the driving chains of the adjacent conveying channels through a reversing mechanism. The present invention utilizes the gap between adjacent conveying channels to provide a reversing mechanism, so that the driving chain of one conveying channel can transmit power to the driven chain of the adjacent conveying channel, and can achieve reasonable assembly within a limited space.

Description

Technical Field

[0001] The invention relates to a straw-pulling mechanism and a cutting platform and a corn harvester containing the same, belonging to the technical field of agricultural machinery. Background Art

[0002] On the cutting table of the existing corn harvester, the transmission method of the rice-pulling chains on both sides of the conveying channel is to transmit power one-to-one from the ear-picking roller. Each rice-pulling chain needs to extend from the front to the back, resulting in a large number of long chains on the cutting table. In addition, a drive structure corresponding to each ear-picking roller needs to be designed on the ear-picking roller. In a limited space, the drive structure is densely arranged, difficult to assemble, and easy to damage.

[0003] The difficulty in solving the above problem lies in the fact that crops need to pass through the middle of the conveying channel, and no structure can be set up to avoid obstruction of crop transportation. Therefore, some special transmission structures can only be set up in the gaps between adjacent conveying channels to change the transmission mode of the plowing chain and reduce the number of long chains to overcome the above problem. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a straw-pulling mechanism and a cutting platform and corn harvester containing the same. Starting from the conveying channels close to both sides, the present invention designs a scheme in which the driven chain is driven by the adjacent active chain. By optimizing the straw-pulling chain and its transmission method, the number of long chains is reduced, and a part of the long chains is changed into short chains at the front end and driven by the adjacent long chains. In this way, the number of long chains driven by the ear-picking rollers is reduced, and the number of required driving structures is also reduced, so that reasonable assembly can be achieved in a limited space, solving the above problems.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a rice-pulling mechanism, comprising at least two conveying channels arranged side by side, a rice-pulling chain is provided on both sides of each of the conveying channels, the conveying channels are divided into two groups with the gap between two of the conveying channels as the boundary or all are grouped together with one side end as the boundary, the rice-pulling chain of each conveying channel close to the boundary side is a driven chain, and the rice-pulling chain away from the boundary side is a driving chain, the driving chains extend from front to rear along the corresponding conveying channels respectively, and the rear ends thereof are used for power input, the driven chains are arranged at the front ends of the corresponding conveying channels, and except for the driven chains at the boundary, the other driven chains are connected to the driving chains of the adjacent conveying channels through a reversing mechanism.

[0006] The beneficial effects of the present invention are as follows: the present invention utilizes the gaps between adjacent conveying channels to set a reversing mechanism, so that the active chain of one conveying channel can transmit power to the driven chain of the adjacent conveying channel. In this way, the driven chain does not need to be extended to the rear to connect with the ear-picking roller through the drive structure. Under the premise of not affecting the normal conveying of crops by the conveying channel, the number of long chains can be reduced, so that nearly half of the reed-picking chains only need to be set at the front end of the corresponding conveying channel and driven by other reed-picking chains. In this way, reasonable assembly can be achieved within a limited space. Moreover, the driving chain can meet the feeding requirements, and the driven chain only at the front end can also make the rear end side of the conveying channel smooth, making feeding smoother.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the conveying channels are all grouped together with one side end as the boundary, and the driven chain at the boundary extends backward for power input.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that the reel chains of all conveying channels can be uniformly set up, the reel chain close to one side is the driven chain, and the reel chain away from the side is the active chain. The active chain and the driven chain at the two end ends are both extended backward to form long chains to obtain power input.

[0010] Furthermore, the conveying channels are divided into two groups with the gap between two of the conveying channels as the boundary, and the two driven chains at the boundary both extend backward for power input.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that all the conveying channels can be set up separately on the left and right sides, divided by a boundary line. The active chains of the conveying channels on both sides drive the driven chains of the adjacent conveying channels away from the boundary line. The two active chains at the two end ends are extended backward to form long chains to obtain power input, and the two driven chains at the boundary line can also be extended backward to form long chains to obtain power input.

[0012] Furthermore, the conveying channel is divided into two groups with the gap between two of the conveying channels as the boundary, and one of the two driven chains at the boundary extends backward for power input and is connected to the other through a reversing mechanism.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that all the conveying channels are set up separately on the left and right sides, divided by a boundary line. The active chains of the conveying channels on both sides drive the driven chains of the adjacent conveying channels away from the boundary line. The two active chains at the two end ends are both extended backward into long chains to obtain power input. The two driven chains at the boundary line can choose one to extend backward into a long chain to obtain power input, and the other is driven to rotate by it. This reduces the number of long chains compared to the above-mentioned technical scheme, requires less space at the rear end, and the structural layout can be more reasonable.

[0014] Furthermore, the driven chain and the active chain are both double-chain structures, and are both provided with tensioning devices.

[0015] Furthermore, the tensioning device of the driven chain is an elastic crank tensioning wheel, and the tensioning device of the driving chain is a spring tensioning wheel.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that the double-chain structure of the plowing chain and the provision of a tensioning device belong to the prior art, but the present invention adopts two different tensioning devices, namely, a spring tensioning wheel for the active chain and an elastic crank tensioning wheel for the driven chain. If the driven chain needs to extend backward, two elastic crank tensioning wheels can be provided at the front and rear respectively for tensioning.

[0017] Furthermore, the plowing chain includes at least two sprockets and a driving chain connecting the sprockets, and the reversing mechanism includes two mutually meshing reversing gears, two reversing sprockets and a reversing chain. One of the sprockets of one of the two plowing chains that need to be connected in transmission is coaxially connected to one of the reversing gears, and one of the sprockets of the other of the two plowing chains that need to be connected in transmission is coaxially connected to one of the reversing sprockets. The other reversing gear is coaxially connected to the other reversing sprocket, and the two reversing sprockets are connected in transmission via the reversing chain.

[0018] The beneficial effect of adopting the above-mentioned further scheme is that in addition to connecting the adjacent rice-pulling chains together for linkage, the reversing mechanism also needs to make the rotation directions of the two rice-pulling chains opposite, so that the rice-pulling chain on the corresponding conveying channel side can rotate from front to back. Based on the existing rice-pulling chain driving the drive chain to rotate through the sprocket, the reversing mechanism is set to the above-mentioned structure, which is relatively simple in structure and can be modified on the existing design.

[0019] Furthermore, the reversing mechanism also includes an elastic crank tensioning wheel for tensioning the reversing chain.

[0020] The beneficial effect of adopting the above further solution is that the reversing chain also requires a tensioning structure to maintain tension. Due to its short length, it is more appropriate to adopt an elastic crank tensioning wheel.

[0021] The present invention also relates to a header, which includes a header frame and a picking roller mounted on the header frame. The header frame is also provided with the above-mentioned reel mechanism, and the picking roller is located at the rear side of the reel mechanism and provides power for it.

[0022] The present invention also relates to a corn harvester, which includes the above-mentioned header. Description of the Drawings

[0023] Figure 1 is a top view of a prior art header;

[0024] Figure 2 is a top view of a prior art reel mechanism;

[0025] Figure 3 is a top view of Embodiment 1 of the reel mechanism of the present invention;

[0026] Figure 4 is a top view of Scheme 1 of Embodiment 3 of the reel mechanism of the present invention;

[0027] Figure 5 is a top view of Scheme 2 of Embodiment 3 of the reel mechanism of the present invention;

[0028] Figure 6 is a top view of Scheme 3 of Embodiment 3 of the reel mechanism of the present invention;

[0029] Figure 7 is a top view of the header of the present invention;

[0030] Figure 8 is a front view of the header of the present invention (the reel chain and the reversing chain are omitted for easy understanding);

[0031] Figure 9 is a schematic structural diagram of the header of the present invention from an inclined perspective (the reel chain and the reversing chain are simplified for easy understanding).

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] 1, conveying channel; 2, reel chain; 21, driven chain; 22, driving chain; 23, spring tensioning wheel; 24, elastic crank tensioning wheel; 25, sprocket; 26, driving chain; 3, reversing mechanism; 31, reversing gear; 32, reversing sprocket; 33, reversing chain; 4, header frame; 5, picking roller. Detailed Embodiments

[0034] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0035] Such as Figure 1 and Figure 2As shown, in the prior art, all the reel chains 2 on both sides of the reel mechanism and the conveying channels 1 on the cutting table are not divided into driving chains and driven chains, and all extend from the front end to the last, and are drivingly connected to the ear-picking rollers 5 mounted on the ear-picking table frame 4. This will result in a large number of long chains on the cutting table, and a driving structure corresponding to each ear-picking roller needs to be designed on the ear-picking roller 5. The driving structures are densely arranged, and the structures on the ear-picking roller 5 are too numerous, causing difficult assembly and easy damage.

[0036] As Figures 3 - 6 As shown, the present invention relates to a reel mechanism, including at least two conveying channels 1 arranged side by side. On both sides of each of the conveying channels 1, reel chains 2 are respectively arranged. The conveying channels 1 are divided into two groups with the gap between two of the conveying channels 1 as the boundary or all in one group with one side end as the boundary. The reel chain 2 on the side of each conveying channel 1 close to the boundary is a driven chain 21, and the reel chain 2 on the side far from the boundary is a driving chain 22. The driving chains 22 respectively extend from the front to the back along the corresponding conveying channels 1, and the rear ends thereof are used for power input. The driven chains 21 are arranged at the front ends of the corresponding conveying channels 1. Except for the driven chains 21 at the boundary, the other driven chains 21 are drivingly connected to the driving chains 22 of the adjacent conveying channels 1 through a reversing mechanism 3.

[0037] The present invention utilizes the gap between adjacent conveying channels 1 to arrange the reversing mechanism 3, so that the driving chain 22 of one conveying channel 1 can transmit power to the driven chain 21 of the adjacent conveying channel 1. In this way, the driven chain 21 does not need to extend to the back and be connected to the ear-picking roller 5 through a driving structure. On the premise of not affecting the normal conveying of crops by the conveying channel 1, the number of long chains can be reduced, and nearly half of the reel chains 2 only need to be arranged at the front end of the corresponding conveying channel and be driven by other reel chains 2, so that reasonable assembly can be realized in a limited space. Moreover, the feeding requirement can be met by the feeding of the driving chain 22, and only the driven chain 21 at the front end can also make the side at the rear end of the conveying channel 1 smooth, and the feeding is more smooth.

[0038] Based on this basic structure, the present invention has the following various specific embodiments.

[0039] Embodiment 1:

[0040] As Figure 3As shown, all of the conveying channels 1 are grouped together with one side end as the boundary, and the driven chain 21 at the boundary extends backward for power input. That is, all the conveying channels 1 are arranged side by side in the same way, and the reel chains 2 of all the conveying channels 1 are uniformly arranged. The reel chain 2 closer to one side is the driven chain 21, and the reel chain 2 farther from one side is the driving chain 22. The driving chain 21 drives the driven chain 21 of the adjacent conveying channel 1. One driving chain 22 and one driven chain 21 at both ends are both extended backward to form a long chain to obtain power input.

[0041] For example, as Figure 3 shown, the reel mechanism has two conveying channels 1. In the prior art of two conveying channels 1, four long reel chains are required, while in Embodiment 1, only three long reel chains are needed. The driven chain 21 of one conveying channel 1 can be only arranged at the front end of the conveying channel 1 and is driven by the driving chain 22 of another conveying channel 1 through the reversing mechanism 3. Compared with the prior art, there is one less driving structure at the ear picking roller 5, and the structural design and assembly are more convenient. If the number of conveying channels 1 is more, they can be arranged side by side in sequence on the basis of the Figure 3 structure.

[0042] Embodiment 2

[0043] The conveying channels 1 are divided into two groups with the gap between two of the conveying channels 1 as the boundary, and the two driven chains 21 at the boundary both extend backward for power input. That is, all the conveying channels 1 are arranged separately on the left and right sides and divided by the boundary. The driving chains 22 of the conveying channels 1 on both sides drive the driven chains 21 of the adjacent conveying channels 1 far from the boundary. The two driving chains 22 at both ends are both extended backward to form a long chain to obtain power input, and the two driven chains 21 at the boundary can also be extended backward to form a long chain to obtain power input. Compared with the single-side structure of Embodiment 1, this embodiment has a structure with two intermediate driven chains 21 opposite to each other, which can maintain the rationality of the arrangement angles of each conveying channel 1, and the overall structure is more symmetrical.

[0044] Embodiment 3

[0045] As Figures 4 - 6As shown, the conveying channels 1 are divided into two groups with the gap between two of the conveying channels 1 as the boundary. One of the two driven chains 21 at the boundary extends backward for power input and is connected to the other through a reversing mechanism 3. That is, all the conveying channels 1 are set up separately on the left and right sides, divided by the boundary. The active chains of the conveying channels 1 on both sides drive the driven chains 21 of the adjacent conveying channels 1 away from the boundary. The two active chains 22 at the ends are both extended backward to form long chains for power input. Of the two driven chains 21 at the boundary, one can be extended backward to form a long chain for power input, and the other is driven to rotate by it. This reduces the number of long chains compared to Example 2, requires less space at the rear end, and can make the structural layout more reasonable. It is the best solution.

[0046] It can be understood that one of the driven chains 21 in the two conveying channels 1 at the boundary is a long chain, and the other driven chain 21 and the driven chains 21 of all other conveying channels 1 are short chains, which can reduce the number of long chains by nearly half compared with the existing technology in which all chains are long chains.

[0047] Example 3 includes the following three technical solutions:

[0048] Option 1: If Figure 4 As shown, there are three conveying channels 1, wherein the boundary between two adjacent conveying channels 1 is formed, and the other conveying channel 1 is located on the other side of one of the conveying channels 1. In this solution, there are a total of 6 reed chains 2, of which only 4 are long chain structures, and 2 only need to be set as short chains at the front end and do not need to be linked with the ear picking roller 5 at the rear end.

[0049] Option 2: If Figure 5 As shown, the apparatus comprises four conveying channels 1, with a boundary between two adjacent conveying channels 1 in the middle, and the other two conveying channels 1 located on either side of the two conveying channels 1. Based on the current harvesting environment of corn harvesters and other similar harvesters, four conveying channels 1 are generally sufficient for harvesting crops. On this basis, the preferred solution is to set a conveying channel 1 on each side of the two conveying channels 1 forming the boundary, with a total of eight reed-pulling chains 2, of which only five are long chain structures, and three only need to be set as short chains at the front end, and do not need to be linked with the ear-picking roller 5 at the rear end.

[0050] Option 3: If Figure 6As shown, there are five conveying channels 1. The two adjacent conveying channels 1 in the middle are separated by a boundary. Another conveying channel 1 is located on one side of the two conveying channels 1, and the remaining two are located on the other side of the two conveying channels 1. In this solution, there are a total of 10 reed chains 2, of which only 6 are long chain structures. 4 only need to be set as short chains at the front end and do not need to be linked with the ear picking roller 5 at the rear end.

[0051] On the basis of the above embodiments, the driven chain 21 and the active chain 22 are both double-chain structures, and are both provided with tensioning devices.

[0052] Preferably, the tensioning device of the driven chain 21 is an elastic crank tensioning wheel 24 , and the tensioning device of the driving chain 22 is a spring tensioning wheel 23 .

[0053] The double-chain structure of the plowing chain 2 and the provision of a tensioning device belong to the prior art, but the present invention adopts two different tensioning devices, namely, a spring tensioning wheel 23 for the active chain 22 and an elastic crank tensioning wheel 24 for the driven chain 21. If the driven chain 21 needs to extend backward, two elastic crank tensioning wheels 24 can be provided at the front and rear respectively for tensioning.

[0054] The specific structures of the spring tensioner 23 and the elastic crank tensioner 24 are shown in the respective drawings. Since they belong to the prior art, the present invention will not elaborate on them here.

[0055] On the basis of the above embodiments, the plowing chain 2 includes at least two sprockets 25 and a drive chain 26 connecting the sprockets 25, the reversing mechanism 3 includes two mutually meshing reversing gears 31, two reversing sprockets 32 and a reversing chain 33, one of the sprockets 25 of one of the two plowing chains 2 that need to be connected in transmission is coaxially connected to the reversing gear 31, one of the sprockets 25 of the other of the two plowing chains 2 that need to be connected in transmission is coaxially connected to a reversing sprocket 32, the other reversing gear 31 is coaxially connected to the other reversing sprocket 32, and the two reversing sprockets 32 are transmission-connected via the reversing chain 33.

[0056] like Figure 5 and Figure 8 As shown, the reversing mechanism 3 not only needs to connect the adjacent reed chains 2 together for linkage, but also needs to make the rotation directions of the two reed chains 2 opposite, so that the reed chain 2 on the corresponding side of the conveying channel 1 can rotate from front to back. Based on the existing reed chain 2 driving the drive chain 26 to rotate through the sprocket 25, the reversing mechanism 3 is set to the above structure, which is relatively simple and can be modified on the existing design.

[0057] The long-chain structure of the reel chain 2 belongs to the prior art. For a straight-line reel chain 2, there is a sprocket 25 at the front end and the rear end respectively, which are sleeved with a driving chain 26. For example, the driving chain 22 located at the two side edges in each drawing. If a certain bending angle needs to be set, there can be a sprocket 25 at the front end, the middle part and the rear end respectively, which are sleeved with a driving chain 26. For example, the driving chain 22 located in the middle in each drawing. The short-chain structure of the reel chain 2 is a straight-line reel chain 2 formed at the front end of the bending angle, with a sprocket 25 at the front end and the middle part respectively, which are sleeved with a driving chain 26. More particularly, in some solutions, one of the driven chains 21 needs to extend backward. Different from the long-chain structure, it is divided into two front and rear segments. The front segment is the same as other short-chain structures. The rear short chain has a sprocket 25 at the middle part and the rear end respectively, and is sleeved with an additional driving chain 26, which is driven by the sprocket 25 at the middle part to transmit the power at the rear end to the front end. The driving chain 26 is also provided with reel protrusions for pushing crops.

[0058] Specifically, a reversing gear 31 can be coaxially connected below the middle sprocket 25 of one of the two reel chains 2 that need to be drivingly connected, and the other reversing gear 31 meshes with it. In order to avoid affecting the conveying of crops in the conveying channel 1, the other reversing gear 31 can be arranged in the gap between adjacent conveying channels 1 and is coaxially connected with a reversing sprocket 32. Another reversing sprocket 32 is coaxially connected below the middle sprocket 25 of the other of the two reel chains 2 that need to be drivingly connected. After the reversing chain 33 bypasses the two reversing sprockets 32 (forming an overall linkage structure, the two reversing gears 31 rotate synchronously in opposite directions to realize the rotation of the reversing chain 33, thereby driving the reversing sprocket 32 to rotate), the driving connection of the middle sprockets 25 of the two reel chains 2 is realized, and the rotation directions are opposite, meeting the function of conveying crops in the conveying channel 1.

[0059] Preferably, the reversing mechanism 3 further includes an elastic crank tensioning wheel for tensioning the reversing chain 33. The reversing chain 33 also needs a tensioning structure to maintain tension. Since its length is short, it is more appropriate to use an elastic crank tensioning wheel.

[0060] As Figure 8 and Figure 9 shown, the present invention also relates to a cutter bar, including a picking table frame 4 and picking rollers 5 installed on the picking table frame 4. The picking table frame 4 is also provided with the above-mentioned reel mechanism. The picking rollers 5 are located at the rear side of the reel mechanism and provide power for it. Other structures on the cutter bar, as well as the picking table frame 4 and the picking rollers 5 themselves, all belong to the prior art. The driving structure on the picking rollers 5 also belongs to the prior art. The purpose of the present invention is only to reduce their number to make the installation space sufficient, and its specific structure will not be elaborated here.

[0061] The present invention also relates to a corn harvester, including the aforesaid header. In addition, for harvesters of other crops, if they involve corresponding conveying channels 1 and reel chains 2, the aforesaid reel mechanism can also be adopted, which falls within the protection scope of the present invention.

[0062] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "middle", "both sides", "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0063] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", "transmission connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0064] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0065] In the description of this specification, the description referring to terms such as "embodiment", "solution", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A threshing mechanism, comprising at least two conveying channels (1) arranged side by side, and threshing chains (2) are respectively arranged on both sides of each of the conveying channels (1), characterized in that, The conveying channel (1) is divided into two groups with the gap between two of the conveying channels (1) as the boundary, or all of them are grouped together with the side end of one side as the boundary. The reed chain (2) on the side close to the boundary of each conveying channel (1) is a driven chain (21), and the reed chain (2) on the side away from the boundary is a driving chain (22). The driving chains (22) extend from front to back along the corresponding conveying channel (1), and their rear ends are used for power input. The driven chains (21) are arranged at the front ends of the corresponding conveying channels (1). Except for the driven chains (21) at the boundary, the other driven chains (21) are connected to the driving chains (22) of the adjacent conveying channels (1) through a reversing mechanism (3). The driven chains (21) and the driving chains (22) are both double-chain structures and are both provided with tensioning devices. 1) is an elastic crank tensioning wheel (24), and the tensioning device of the driving chain (22) is a spring tensioning wheel (23); the reeling chain (2) comprises at least two sprockets (25) and a driving chain (26) connected to the sprockets (25); the reversing mechanism (3) comprises two reversing gears (31) meshing with each other, two reversing sprockets (32) and a reversing chain (33); one of the sprockets (25) of one of the two reeling chains (2) that need to be connected in transmission is coaxially connected to one of the reversing gears (31); one of the sprockets (25) of the other of the two reeling chains (2) that need to be connected in transmission is coaxially connected to one of the reversing sprockets (32); the other reversing gear (31) is coaxially connected to the other reversing sprocket (32); and the two reversing sprockets (32) are connected in transmission via the reversing chain (33).

2. The header mechanism according to claim 1, characterized in that, The conveying channels (1) are all grouped together with one side end as a boundary, and the driven chain (21) at the boundary extends backward for power input.

3. The threshing mechanism according to claim 1, characterized in that, The conveying channels (1) are divided into two groups with the gap between two of the conveying channels (1) as a boundary line, and the two driven chains (21) at the boundary line both extend backwards for power input.

4. The threshing mechanism according to claim 1, characterized in that, The conveying channels (1) are divided into two groups with the gap between two of the conveying channels (1) as the boundary line. One of the two driven chains (21) at the boundary line extends backward for power input and is connected to the other through a reversing mechanism (3).

5. The header mechanism according to claim 1, characterized in that, The reversing mechanism (3) further comprises an elastic crank tensioning wheel (24) for tensioning the reversing chain (33).

6. A header, comprising a header frame (4) and a corn picker roll (5) mounted on the header frame (4), characterized in that, The ear-picking stand (4) is also equipped with a straw-pulling mechanism as claimed in any one of claims 1 to 5, and the ear-picking roller (5) is located at the rear side of the straw-pulling mechanism and provides power for the straw-pulling mechanism.

7. A corn harvester, characterized in that, Comprising the header as claimed in claim 6.

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