Corn stalks part of the section of the field combined with the fruit of the harvest device

Abstract

The present application relates to the technical field of agricultural machinery, and more particularly to a fruit ear collecting device for corn stalk partial cutting and field returning combined harvesting. The device comprises a machine body, a middle part of the machine body is provided with a guiding conveying part for vertical conveying and displacement of the stalks; and a fruit ear collecting device is installed above the guiding conveying part to collect the fruit ears on the upper half of the stalks. The fruit ear collecting device for corn stalk partial cutting and field returning combined harvesting can complete the collection of the fruit ears during the field returning process, reasonably divide and utilize the crops, improve the operation efficiency and utilization rate, and reduce the labor intensity of the workers.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a corn cob collecting device for returning partially cut corn stalks to the field and combining them for harvesting. Background Art

[0002] Wheat-corn rotation is the main cropping pattern in North China. The question of whether corn stalks should be returned to the fields or removed from them has long troubled farmers and researchers.

[0003] Returning straw to the field can increase soil organic matter, improve soil fertility, and increase soil buffering capacity; however, straw decomposition requires fixing soil nitrogen, which creates a "nitrogen competition effect" with the growth of the next wheat crop. Studies have shown that returning all corn straw to the field can fix 50-90 kg / ha of available nitrogen in the topsoil, resulting in fewer wheat tillers and yellowing seedlings. The negative effects of returning straw to the field are particularly pronounced when the amount of straw is large and the tillage depth is shallow. Removing straw from the field can eliminate the "nitrogen competition effect" caused by straw decomposition, which is beneficial to the emergence and tillering of the next wheat crop, but it reduces the return of organic carbon to the farmland soil, slows the improvement of soil fertility, and hinders the development of sustainable agriculture.

[0004] Long-term experimental studies have shown that the most suitable amount of corn straw to be cut and returned to the field without affecting the growth, development and yield of the next wheat crop is 55%-70% (the best ratio is 64%) under rotary tillage (depth of about 15 cm). Currently, most people choose to return the straw by crushing it into pieces or cutting it into pieces in full. In actual operations, in order to ensure the proportion of straw returned to the field, the upper straw needs to be recovered. During the recovery process, the straw and the top ears are usually stored together, and classified recovery is impossible. As a result, when the straw is used later, the staff need to manually remove and recover the ears, which is inefficient and increases the workload of the workers. Moreover, the straw is easily lost during transportation due to the loss of water in the straw itself. Therefore, there is an urgent need for a machine that can complete the recovery of part of the ears on the straw during the process of returning the straw to the field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned technical deficiencies and provide a corn stalk partial cutting and returning combined harvesting ear collection device. During the returning process, the ear collection is completed, the crops are reasonably divided and utilized, the operation efficiency and utilization rate are improved, and the labor intensity of the workers is reduced.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] A machine body, wherein the middle portion of the machine body has a guide conveying portion for vertical conveying displacement of straw;

[0008] The fruit ear collecting device is installed above the guide conveying part to collect the fruit ears on the upper half of the straw.

[0009] Preferably, the ear collecting device includes an air bag arranged opposite to the guide conveying part, and a casing; the casing is provided with an extrusion part, a cutting part for separating the ear transmission, and a screening part for separating the ear and leaves in sequence from the direction of straw entry.

[0010] Preferably, the extrusion member includes a first pressing wheel, a second pressing wheel and a third pressing wheel arranged in sequence from the direction of straw entry; the diameters of the first pressing wheel, the second pressing wheel and the third pressing wheel increase in sequence, and are divided into three sections along the axial direction, and breaking blades are arranged at intervals along the circumferential direction of the first pressing wheel.

[0011] Preferably, the cutting member includes a stripping channel communicated with the extruding member, a fifth conveyor belt located above the stripping channel, and a blocking knife located below the stripping channel.

[0012] Preferably, the diameter of the blade of the blocking knife increases from left to right, and the right end has a parallel cutting edge for cutting straw.

[0013] Preferably, the screening member includes a first rotating member, a second rotating member and a blocking member; the first rotating member is rotatably connected to the casing, and a plurality of first adsorption members are evenly provided on the first rotating member; a plurality of second adsorption members are provided on the second rotating member, and a plurality of notches are provided on the second adsorption member, and the first rotating member and the second rotating member both rotate clockwise; the blocking member cooperates with the notches.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The fruit ear collection device can remove the fruit ears on the straw during the transportation process of the guide conveyor and use airflow to collect them. It is fast and efficient, reducing the labor intensity of the staff. At the same time, the integrated picking operation also reduces the waste of fruit ears falling off.

[0016] 2. The ear collection device is arranged inside the machine body with a reasonable structural layout. During the movement of the machine, the ear collection device can collect and recycle the straw in the process of transmission. It fully adapts to the operation of the machine, improves the operation efficiency and reduces the labor intensity of the staff.

[0017] 3. During the fruit cluster picking operation, various operation modes of fruit cluster picking can be achieved by changing the direction or internal size of the cutting piece. The staff can choose and adjust according to the actual situation, which improves the overall applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a corn stalk segmentation and return to the field combined harvester.

[0019] Figure 2 This is a schematic diagram of the overall layout of the corn stalk segmentation and return to the field combine harvester.

[0020] Figure 3 This is a schematic diagram of the air bag structure of the corn ear collecting device for the combined harvester that returns part of the corn stalks to the field;

[0021] Figure 4 A schematic diagram of the internal connections of a corn stalk segmentation and return to field combine harvester.

[0022] Figure 5 A top view of the guide and conveying portion of a corn stalk segmentation and return to field combine harvester;

[0023] Figure 6 This is a schematic diagram of the conveyor roller structure of the corn stalk segmentation and return to the field combine harvester;

[0024] Figure 7 A second conveyor belt for the corn stalk segmentation and ear collection device for the combined harvester;

[0025] Figure 8 A schematic diagram showing the connection of the second conveyor belt portion of the corn stalk segmentation and return to the field combine harvester's ear collection device;

[0026] Figure 9 This is a schematic diagram of the structure of the ear collecting device of the combine harvester for returning part of the corn stalks to the field;

[0027] Figure 10 A schematic diagram of the bottom connection of the housing of a corn stalk segmented and returned to the field combine harvester;

[0028] Figure 11 This is a schematic diagram of the structure of the extruded parts of the corn stalks cut into segments and returned to the field by the combine harvester;

[0029] Figure 12 This is a schematic diagram of the structure of the cutting part of the corn stalks cutting and returning to the field combine harvester;

[0030] Figure 13 This is a schematic diagram of the structure of the screening component of the corn stalk segmentation and return to the field combine harvester;

[0031] Figure 14 A top view of the casing of a corn ear collecting device for a combine harvester that partially cuts corn stalks and returns them to the field.

[0032] In the figure: 1. body; 8. fruit cluster collecting device; 9. extruding member; 10. cutting member; 11. screening member; 12. stripping channel; 13. fifth conveyor belt; 14. blocking knife; 15. first rotating member; 16. second rotating member; 17. blocking member; 18. first adsorption member; 19. second adsorption member; 20. notch; 501. conveying roller; 502. second conveyor belt; 503. storage chamber; 504. third conveyor belt; 505. conducting thread; 506. pressure plate; 801. air bag; 802. housing; 901. first pressure wheel; 902. second pressure wheel; 903. third pressure wheel; 904. breaking blade. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0034] Specific implementation method 1: Combination Figure 1-14 As shown, the corn stalks are partially cut and returned to the field for combined harvesting, which is characterized by comprising: a body 1, a guide conveying portion 5 for vertically conveying the stalks in the middle of the body 1; an ear collecting device 8, the ear collecting device 8 being installed above the guide conveying portion 5 to collect the ears on the upper half of the stalks;

[0035] The guide plate is fixed to the front end of the body 1 with screws or bolts. During the movement, the straw enters the guide groove from the front of the guide plate. At the same time, the opening of the guide groove gradually narrows to guide and position the straw, preventing the straw from falling to both sides, making it easier to cut the straw.

[0036] Combine Figure 4 and Figure 5 As shown, the guide conveying part 5 includes conveying rollers 501 distributed on both sides, a second conveyor belt 502 arranged opposite to the conveying rollers 501, and a storage chamber 503 connected to the second conveyor belt 502; the second conveyor belt 502 is arranged in an upper and lower double layer; a third conveyor belt 504 arranged obliquely and having a gap is provided in the storage chamber 503; the cross-sectional shape of the conveying roller 501 is trapezoidal; the second conveyor belt 502 adopts a double layer arrangement, which effectively ensures that the straw remains in a vertical state during transportation, and the surface of the second conveyor belt 502 has a partition for positioning (see Figure 7), which can sequentially transmit the straw transported by the toothed disc 405, and the design of the conveying roller 501 can smoothly push the straw out of the rotary channel 402. During the rotation of the truncated cone-shaped conveying roller 501, the thrust generated by friction and rotation is used to push the straw toward the second conveyor belt 502. Under the action of the thrust, the straw enters the storage chamber 503 and waits for the extraction of the third conveyor belt 504. The design of the storage chamber 503 reserves storage space for the straw, avoiding the rapid accumulation of a large amount of straw in the ring-cutting collection part 6, which affects the cutting process. At the same time, the design of the storage chamber 503 can also be used specifically for straw storage to meet the harvesting needs of silage.

[0037] The third conveyor belt 504 has a transverse notch on its surface. During the rotation process, the straw is engaged and the straw is moved upward. The width of the transverse notch is between 2 and 2.8 cm. If it is too small, the straw cannot be engaged effectively, while if it is too large, the straw may be easily stuck in the notch.

[0038] Combine Figure 5 As shown, the third transmission belt 504 has a through-hole structure connected to the outside below. When the third transmission belt 504 drives the straw to be transported, the transverse notch of the third transmission belt 504 can be used to drop the debris mixed in the straw to the outside of the body 1, thereby achieving the function of removing debris.

[0039] The preferred embodiment, combined with Figure 6 As shown, the surface of the conveying roller 501 has a conductive thread 505; in order to further improve the stability of the straw when it is separated from the toothed disc 405, a spiral conductive thread 505 is added to the surface of the conveying roller 501. As the conveying roller 501 rotates, the conductive thread 505 is used to push the straw out, making it more stable and avoiding slipping.

[0040] The preferred embodiment, combined with Figure 5 As shown, a retractable pressure plate 506 is provided on the storage chamber 503 for clamping the upper half of the straw. The pressure plate 506 clamps the upper part of the straw, and cooperates with the third conveyor belt 504 to convey the lower end of the straw, so that the straw is tilted and sequentially enters the ring cutting and collecting part 6 for operation. Under the clamping action of the pressure plate 506, the straw is effectively prevented from falling due to the bumpy travel.

[0041] Combine Figure 1-14As shown, the ear collecting device 8 includes an air bag 801 arranged opposite to the guide conveying part 5, and a casing 802; the casing 802 is provided with an extrusion piece 9, a cutting piece 10 for separating the ear transmission and the screening piece 11 for separating the ear and the leaves in sequence from the direction of the straw entering; the air bag 801 is installed on the body 1 and is located opposite the second conveyor belt 502. After being inflated, the air bag 801 uses its own softness and elasticity to achieve the positioning of the straw, and does not interfere with the displacement of the straw itself, so that it can smoothly pass through the extrusion piece 9 and the cutting piece 10 in sequence; wherein, the extrusion piece 9 flattens the middle part of the straw, reserves the operation displacement space of the cutting piece during the ear picking process at the top of the straw, and after the ear falls, the exhaust system is used to recycle the ear, so that the ear picking and recycling can be quickly realized;

[0042] Specifically, it can also be combined with Figure 3 As shown, the airbag 801 is divided into three parts: left, middle, and right. The left part can be contracted before the straw enters and expanded and positioned after the straw arrives to facilitate the entry of the straw. The right part can be optionally contracted when the straw passes through to facilitate the smooth output of the straw, while the middle part remains inflated and limited. Among them, the surface of the airbag 801 can also be increased with a wear-resistant layer to prevent the straw from scratching or tearing the airbag after long-term use. The wear-resistant layer can be specifically coated with rubber on the surface, and flexible metal wires arranged horizontally or vertically are applied inside the rubber to protect the safety of the airbag.

[0043] In a preferred embodiment, the extruder 9 includes a first pressing wheel 901, a second pressing wheel 902 and a third pressing wheel 903 arranged in sequence from the direction of straw entry; the diameters of the first pressing wheel 901, the second pressing wheel 902 and the third pressing wheel 903 increase in sequence and are divided into three sections along the axial direction, and a cutting blade 904 is arranged at intervals along the circumferential direction of the first pressing wheel 901; when the straw enters, the first pressing wheel 901, the second pressing wheel 902 and the third pressing wheel 903 complete the flattening operation of the straw, and at the same time the three pressing wheels 903 are pressed together. The diameter of the rollers 901 gradually increases, ensuring the squeezing effect on the straw and avoiding the straw from slipping due to the small gap when the straw enters. The notching blade 904 on the first pressing wheel 901 can press a notch on the straw to push the straw to move, and at the same time facilitate the second pressing wheel 902 and the third pressing wheel 903 at the rear to flatten the straw. The notch position can release the internal pressure and avoid the straw from being broken in multiple places during the flattening process, which makes it impossible to maintain an upright state.

[0044] In a preferred embodiment, the cutting member 10 includes a stripping channel 12 communicating with the extruding member 9, a fifth conveyor belt 13 located above the stripping channel 12, and a blocking knife 14 located below the stripping channel 12;

[0045] First working state, combined Figure 10 and 14As shown, the blocking knife 14 on the left rotates clockwise and the right rotates counterclockwise. During the rotation, as the flattened part of the straw continuously moves inward (i.e., to the right) along the stripping channel 12, and as the gap between the two blocking knives 14 becomes smaller, the flattened part of the straw is pushed to deform downward, so that the top ear is squeezed against the continuously narrowing stripping channel 12, completing the picking operation of the ear. After the straw enters the stripping channel 12, the fifth conveyor belt 13 continues to move forward to cover and position the ear, and after the ear falls off, it will not fall off at will, reducing the difficulty of collection.

[0046] With respect to the first working state, it can also be set that the blocking knife 14 on the left side rotates clockwise and the right side rotates counterclockwise. During the rotation, as the flattened part of the straw continuously moves inward along the stripping channel 12, by controlling the size of the two blocking knives 14 and the width design between the stripping channels 12, a relatively complete cutting process of the ear portion is achieved. Specifically, the blocking knife 14 is divided into three parts: left, middle and right. The left part is a horizontal blade, which comes into contact with the straw, but the gap is relatively large and will not drive the upper part of the straw to move, while the middle part is an inclined blade, which gradually narrows from left to right, and the right part is a horizontal blade, and forms a shear, with no gap in between, and the stripping channel 12 is relatively wide, which can achieve the smooth passage of the flattened straw. During operation, as the straw is driven by the second conveyor belt 502, it moves to the right, and the position When the blade 14 moves to the middle part of the blocking knife 14, as the blade narrows, it begins to push the straw downward to move, and according to the conveying speed of the second conveyor belt and the blade length of the middle part of the blocking knife, the cutting position of the upper part of the straw is controlled, thereby realizing a relatively complete cutting and recycling operation of the fruit ear part; when the cutting position is inaccurate due to the different heights of the straw, the fruit ears are easily wasted. In this regard, the stripping channel 12 is narrowed as a whole, such as the width of the stripping channel 12 in the first working state mentioned above, or a corresponding stripping channel 12 is used, and the corresponding part of the stripping channel 12 and the middle position of the blocking knife 14 are adaptively narrowed. When the overall height of the straw is low, when the blocking knife 14 drives the straw to move downward, part of the fruit ears will fall down through the squeezing of the stripping channel 12 and then be cut off, without waste caused by the cutting position problem;

[0047] In the second working state, the left blocking knife 14 rotates counterclockwise and the right side rotates clockwise. At this time, the air bag 801 cooperates with the second conveyor belt 502 to drive the straw to the bottom of the stripping channel 12, and as the second conveyor belt 502 continues to move, the straw moves obliquely downward from the flattened position, pulling the fruit ear and the stripping channel 12 to be squeezed. At the same time, the rotary cutting force generated by the rotation of the blocking knife 14 is cooperated to complete the removal of the fruit ear. In this state, the second conveyor belt 502 cooperates with the air bag 801 to ensure that the straw is reliably positioned and complete the collaborative operation.

[0048] With respect to the second working state, it can also be set that the left blocking knife 14 rotates counterclockwise and the right one rotates clockwise. At this time, the air bag 801 cooperates with the second conveyor belt 502 to drive the straw into the stripping channel 12 and displace it to the right. The width of the stripping channel 12 is relatively wide, and the range is controlled between 3-4.2 cm, and the second conveyor belt 502 becomes inclined. The inclination direction is downward from the entry direction of the straw to the moving direction, thereby driving the straw to move downward to the right during the displacement process. During the displacement process, the two blocking knives 14 are used to realize the peeling of the fruit ear, which can maintain the integrity of the fruit ear removal, and the stripping channel 12 plays a guiding and positioning role for the straw at this time;

[0049] In a preferred embodiment, the diameter of the blade of the blocking knife 14 increases from left to right, and the right end has a parallel cutting edge for cutting the straw. The size of the blocking knife 14 gradually increases, and when the straw passes through, the ears at the top of the straw are picked. At the same time, the parallel cutting edge at the tail position can completely cut off the top of the straw to ensure the picking effect.

[0050] By blocking the parallel edge of the tail of the knife 14, the top of the straw can be completely shortened, thereby completing the collection and utilization of the complete fruit ears. The specific working mode can be selected according to needs;

[0051] The preferred embodiment, combined with Figure 9-14 As shown, the screening member 11 includes a first rotating member 15, a second rotating member 16 and a blocking member 17; the first rotating member 15 is rotatably connected to the housing 802, and a plurality of first adsorption members 18 are evenly provided on the first rotating member 15; a plurality of second adsorption members 19 are provided on the second rotating member 16, and a plurality of notches 20 are provided on the second adsorption member 19, and the first rotating member 15 and the second rotating member 16 both rotate clockwise; the blocking member 17 cooperates with the notches 20; in the process of picking fruit ears, there will be leaves mixed in them, in this regard, the picked fruit ears and leaves are conveyed to the position of the screening member 11 via the fifth conveyor belt 13, and the fruit ears themselves are cylindrical and cannot be captured by the suction force on the first adsorption member 18, and fall directly to the bottom. The blades are transported and collected in the opposite direction, and the blades themselves are long and have a certain surface area. After contacting the first adsorption member 18, the first adsorption member 18 adsorbs them and rotates clockwise to the position of the second adsorption member 19, and the second adsorption member 19 continues to adsorb and rotate. After contacting the blocking member 17, the blades are pushed down, completing the screening and separation of the blades and the fruit ears, ensuring the fruit ear collection effect and reducing impurities; wherein, for the collection of the blades, a horizontal conveyor belt can be arranged under the blocking member to transport the blades to the right, and the suction force generated by the fan is used to transport the blades to the corresponding storage space. As for the fruit ears, they can be directly transported to the corresponding storage space after falling under the first rotating member 15, and the suction force generated by the fan is used to transport the fruit ears to the corresponding storage space.

[0052] Combine Figure 10 and Figure 14 As shown in the figure, in order to further reduce the waste of the ear, the side of the stripping channel 12 is hollowed out to form an air duct, which is connected with the fan to form a negative pressure area. When the ear particles fall, they are sucked into the air duct under the action of negative pressure for recycling. The outlet end is in communication with the storage space of the whole ear, and the collection and utilization are completed.

[0053] Specifically, the present application also provides another picking method for the ear, which is specifically combined Figure 1-14 As shown in the figure, the corn straw part is cut into sections and returned to the field combined with the ear collecting device, characterized in that it comprises:

[0054] The machine body 1 has a guide conveying part 5 in the middle for vertical conveying and displacement of the straw;

[0055] The ear collecting device 8 is installed above the guide conveying part 5 to collect the ear on the upper half of the straw. The ear collecting device 8 comprises an air bag 801 arranged opposite to the guide conveying part 5, and a machine shell 802. The machine shell 802 is provided with an extrusion piece 9, a cutting piece 10 for separating the ear transmission, and a screening piece 11 for separating the ear and the leaf in sequence from the straw entering direction;

[0056] In a preferred embodiment, the extrusion piece 9 comprises a first pressure roller 901, a second pressure roller 902 and a third pressure roller 903 arranged in sequence from the straw entering direction. The diameters of the first pressure roller 901, the second pressure roller 902 and the third pressure roller 903 increase in sequence, and are all divided into three sections along the axial direction. The broken blade 904 is arranged at intervals along the circumferential direction of the first pressure roller 901;

[0057] In a preferred embodiment, the cutting piece 10 comprises a stripping channel 12 in communication with the extrusion piece 9, a blocking knife 14 arranged above the stripping channel 12, and a blocking knife 14 arranged below the stripping channel 12. The bottom surface of the machine shell 802 is inclined and inclined to the stripping channel 12. The side of the stripping channel 12 is provided with an air duct. The blade of the blocking knife 14 increases in size from left to right in rotation diameter.

[0058] In a preferred embodiment, the screening piece 11 comprises a first rotating piece 15, a second rotating piece 16 and a blocking piece 17. The first rotating piece 15 is rotationally connected with the machine shell 802, and a plurality of first suction accessories 18 are uniformly arranged on the first rotating piece 15. A plurality of second suction accessories 19 are arranged on the second rotating piece 16, and a plurality of slots 20 are arranged on the second suction accessories 19. The first rotating piece 15 and the second rotating piece 16 are both clockwise rotating. The blocking piece 17 cooperates with the slots 20.

[0059] In this solution, the blocking blades 14 are arranged on the upper and lower sides of the stripping channel 12 and are arranged in pairs. The blocking blades 14 on the upper layer are symmetrically arranged, and the blocking blades 14 on the left side rotate counterclockwise and the blocking blades on the right side rotate clockwise. The blocking blades 14 on the lower layer are symmetrically arranged, and the blocking blades 14 on the left side rotate clockwise and the blocking blades on the right side rotate counterclockwise. In addition, the blocking blades 14 on the lower layer are larger in size. For example, in the same longitudinal cross-section, the gap generated by the rotary cutting diameters of the two upper blocking blades 14 is larger than the blocking blades 14 on the lower layer, so that the blocking blades 14 on the lower layer drive the flattened straw to move downward, and the fruit ears are rotary-cut in the upper direction. The fallen fruit ears gather along the inclined surface to the stripping channel, and when they fall, the fruit ear particles are sucked and collected by the suction force of the air duct.

[0060] As for the leaves mixed in it, some of them are pushed to the screening element 11 when the straw itself moves along the stripping channel 12, while the smaller leaves fall into the air duct and are adsorbed. They can be pushed down when the subsequent straw moves through. The overall structure is reasonably arranged and can be used for collecting fruit ear particles.

[0061] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A corn stalk segmentation and return to field combined harvesting device, characterized in that: include: A machine body (1), wherein the middle portion of the machine body (1) is provided with a guide conveying portion (5) for conveying and displacing straw in a vertical direction; A fruit ear collecting device (8), which is installed above the guide conveying part (5) and collects fruit ears from the upper half of the straw; The ear collecting device (8) comprises an air bag (801) arranged opposite to the guide conveying part (5), and a housing (802); the housing (802) is provided with an extrusion part (9), a cutting part (10) for separating the ear transmission, and a screening part (11) for separating the ear and the leaves in sequence from the straw entry direction; The extrusion member (9) comprises a first pressing wheel (901), a second pressing wheel (902) and a third pressing wheel (903) arranged in sequence from the direction of straw entry; the diameters of the first pressing wheel (901), the second pressing wheel (902) and the third pressing wheel (903) increase in sequence and are divided into three sections along the axial direction; breaking blades (904) are arranged at intervals along the circumference of the first pressing wheel (901); The cutting member (10) includes a stripping channel (12) communicating with the extruding member (9), a fifth conveyor belt (13) located above the stripping channel (12), and a blocking knife (14) located below the stripping channel (12); The screening member (11) includes a first rotating member (15), a second rotating member (16) and a blocking member (17); the first rotating member (15) is rotatably connected to the housing (802), and a plurality of first adsorption members (18) are evenly arranged on the first rotating member (15); a plurality of second adsorption members (19) are arranged on the second rotating member (16), and a plurality of notches (20) are arranged on the second adsorption member (19); the first rotating member (15) and the second rotating member (16) both rotate clockwise; and the blocking member (17) cooperates with the notches (20).

2. The corn stalk segmentation and return to field combine harvester according to claim 1, characterized in that: The diameter of the blade of the blocking knife (14) increases from left to right, and the right end has a parallel blade edge for cutting off straw.

3. The corn stalk segmentation and return to field combine harvester according to claim 1, characterized in that: The airbag (801) is divided into three parts: left, middle and right according to the direction of entry of the straw, and can adjust its own expansion or contraction state respectively.

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