Corn harvester with low-loss threshing structure

Abstract

The invention relates to the technical field of corn harvesters, and discloses a corn harvester with a low-loss threshing structure.The corn harvester comprises a machine body, a threshing shell is installed on one side of the top of the machine body, a threshing mechanism is arranged in the threshing shell, and the threshing mechanism comprises a corn kernel bin; the outer wall of the corn kernel bin is fixedly connected to the inner wall of the threshing shell, a material bin is arranged in the corn kernel bin, a fixing block is installed on the inner wall of the bottom of the material bin, a fixing base is rotationally connected to the top end of the fixing block, and a cylinder is fixedly connected to the top of the fixing base; the inner wall of the bottom of the threshing shell is fixedly connected with a supporting frame. According to the corn thresher, the hammer head rotating at a high speed is adopted, and an air blowing mechanism and a vibration mechanism in the auxiliary threshing assembly are combined, so that the flowing speed of corn in the barrel is effectively increased, the staying time of the corn in the barrel is shortened, the breakage rate of corn kernels is reduced, and the commodity quality and the subsequent processing and utilization value of the corn kernels are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of corn harvester technology, specifically to a corn harvester with a low-damage threshing structure. Background Technology

[0002] A corn harvester is a modern agricultural mechanized operation equipment that integrates multiple functions such as corn stalk cutting, corn cob picking, conveying, threshing, cleaning, grain collection, and stalk processing. In the field of mechanized corn harvesting, the threshing process of a corn harvester is one of the core procedures.

[0003] The existing corn harvester threshing structure generally suffers from a high corn kernel breakage rate during the threshing process. The high breakage rate not only affects the commercial value of the corn, but also increases the difficulty and cost of subsequent cleaning and screening. At the same time, the traditional threshing structure is prone to corn cob accumulation due to poor corn flow when processing corn ears, which further affects threshing efficiency and effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a corn harvester with a low-damage threshing structure, solving the problem that existing corn harvesters generally have a high corn kernel breakage rate during the threshing process. A high breakage rate not only affects the commercial value of the corn but also increases the difficulty and cost of subsequent cleaning and screening. At the same time, traditional threshing structures are prone to corn ear accumulation due to poor corn flow when processing corn ears, further affecting threshing efficiency and effectiveness.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corn harvester with a low-damage threshing structure, comprising a machine body, a threshing shell installed on one side of the top of the machine body, a threshing mechanism disposed inside the threshing shell, the threshing mechanism including a corn kernel bin, the outer wall of the corn kernel bin being fixedly connected to the inner wall of the threshing shell, a hopper disposed inside the corn kernel bin, a fixing block installed at the bottom of the hopper, a fixing seat rotatably connected to the top of the fixing block, a cylinder fixedly connected to the top of the fixing seat, a support frame fixedly connected to the bottom inner wall of the threshing shell, the bottom of the cylinder contacting the top of the support frame, a motor being installed at one end of the cylinder, a rotating shaft fixedly connected to the output end of the motor, fixing rings being uniformly fixedly connected to the outer wall of the rotating shaft, hammers being symmetrically arranged on the outer wall of the fixing rings, and an auxiliary threshing assembly disposed inside the support frame.

[0006] By adopting the above technical solution, during the threshing process, motor two is started, driving the rotating shaft to rotate. The rotating shaft drives the cam to rotate reciprocally. The cam drives the swing rod to swing reciprocally through the eccentric rod. The swing rod pushes the piston to slide reciprocally inside the sleeve. When the piston moves closer to the cam, solenoid valve one opens and solenoid valve two closes, and external gas is drawn into the sleeve through the air inlet pipe. When the piston moves away from the cam, solenoid valve one closes and solenoid valve two opens, and the gas inside the sleeve enters the conveying hose through the guide pipe, and then flows into the arc-shaped pipe. The gas in the arc-shaped pipe flows into multiple air outlet pipes and is blown into the cylinder through the air outlet pipes. By blowing air, the flow of corn can be accelerated, the residence time of corn in the cylinder can be shortened, the corn breakage rate can be reduced, and the commercial quality and subsequent processing value of corn kernels can be effectively improved.

[0007] Preferably, the outer wall of the rotating shaft is uniformly fixedly connected with limiting rings, and each of the fixed rings is correspondingly arranged between two limiting rings, and filter holes are uniformly opened at the bottom of the hopper.

[0008] Preferably, one end of the cylinder has a discharge port and the other end of the cylinder has a feed port, and a feed hopper is provided inside the feed port of the cylinder.

[0009] Preferably, the auxiliary threshing assembly includes a support base, the bottom of which is fixedly connected to the inner wall of the support frame, and a sleeve is provided on the top of the support base, with a piston slidably connected inside the sleeve.

[0010] Preferably, a support column is fixedly connected to the inner wall of the support frame, a second motor is installed on the top of the support column, a rotating shaft is fixedly connected to the output end of the second motor, a cam is fixedly connected to the outer wall of the rotating shaft, and the outer wall of the cam is in contact with the bottom of the cylinder.

[0011] Preferably, an eccentric rod is mounted on one side of the cam, and a swing rod is provided on the outer wall of the eccentric rod. The end of the swing rod away from the eccentric rod is rotatably connected to a connecting seat, and one side of the connecting seat is fixedly connected to one side of the piston.

[0012] Preferably, an air inlet pipe is fixedly connected to the top of the sleeve, a solenoid valve is provided on the outer wall of the air inlet pipe, and a guide pipe is fixedly connected to one side of the sleeve.

[0013] Preferably, an air outlet pipe is uniformly and fixedly connected to the end of the cylinder away from the motor, and an arc-shaped body is fixedly connected to the inner wall of the cylinder. One end of the air outlet pipe is located inside the arc-shaped body, and air outlet holes are uniformly opened inside the arc-shaped body. The air outlet holes of the arc-shaped body correspond one-to-one with the air outlet pipe.

[0014] Preferably, an arc-shaped pipe is fixedly connected to the other end of the air outlet pipe, a delivery hose is fixedly connected to the middle of the arc-shaped pipe, the end of the delivery hose away from the arc-shaped pipe is fixedly connected to one end of the guide pipe, and a second solenoid valve is provided on one side of the delivery hose.

[0015] Preferably, a harvesting platform is provided at one end of the machine body, a feeding structure is provided on one side of the harvesting platform, one end of the feeding structure is fixedly connected to one side of the threshing shell, and a tracked walking structure is symmetrically provided at the bottom of the machine body.

[0016] Working principle: The tracked walking structure at the bottom of the machine body drives the whole machine to move. The harvesting table at one end of the machine body completes the cutting of corn stalks. The cut corn ears are conveyed to the feed hopper of the threshing shell through the feeding structure, and then enter the cylinder through the feed hopper to realize the material conveying and feeding before threshing. During threshing, motor one is started, driving the rotating shaft to rotate, which in turn drives the fixed ring and hammer to rotate at high speed. The high-speed rotation of the hammer can peel the corn kernels from the corn cob. The corn kernels and corn cobs move downwards through the inclined cylinder and are discharged through the discharge port into the hopper. The corn kernels fall into the corn kernel hopper through the filter holes at the bottom of the hopper and slide down through the corn kernel hopper to be discharged. The corn cobs slide down through the inner wall of the hopper to be discharged, thus achieving the separation of corn kernels and corn cobs. During the threshing process, motor two is started, driving the rotating shaft to rotate. The rotating shaft drives the cam to rotate back and forth. The cam drives the swing rod to swing back and forth through the eccentric rod. The swing rod pushes the piston to slide back and forth in the sleeve. When the piston moves closer to the cam, solenoid valve one opens and solenoid valve two closes. External gas is drawn into the sleeve through the air inlet pipe. When the piston moves away from the cam, solenoid valve one closes and solenoid valve two opens. The gas in the sleeve enters the conveying hose through the guide pipe, and then flows into the arc-shaped pipe. The gas in the arc-shaped pipe flows into multiple air outlet pipes and is blown into the cylinder through the air outlet pipes. By blowing air, the flow of corn can be accelerated, the residence time of corn in the cylinder can be shortened, and the corn breakage rate can be reduced. While the cam reciprocates, it causes the cylinder to vibrate up and down around the rotational connection point between the fixed block and the fixed seat, further accelerating the flow rate of corn and preventing the corn from accumulating inside the cylinder.

[0017] This invention provides a corn harvester with a low-damage threshing structure. It has the following beneficial effects: 1. In this invention, during the threshing process, motor two is started, driving the rotating shaft to rotate. The rotating shaft drives the cam to rotate reciprocally. The cam drives the swing rod to swing reciprocally through the eccentric rod. The swing rod pushes the piston to slide reciprocally within the sleeve. When the piston moves closer to the cam, solenoid valve one opens and solenoid valve two closes, allowing external gas to be drawn into the sleeve through the air inlet pipe. When the piston moves away from the cam, solenoid valve one closes and solenoid valve two opens, allowing gas in the sleeve to enter the conveying hose through the guide pipe, and then flow into the arc-shaped pipe. The gas in the arc-shaped pipe flows into multiple air outlet pipes and is blown into the cylinder through the air outlet pipes. By blowing air, the flow of corn can be accelerated, the residence time of corn in the cylinder can be shortened, the corn breakage rate can be reduced, and the commercial quality and subsequent processing value of corn kernels can be effectively improved.

[0018] 2. In this invention, the cam reciprocates while the cylinder vibrates up and down around the rotational connection point between the fixed block and the fixed seat, further accelerating the flow rate of corn, shortening the residence time, and further reducing the corn breakage rate. At the same time, the vibration function of the cylinder can effectively prevent the accumulation of corn during the threshing process, avoiding insufficient threshing caused by material accumulation, ensuring the continuity and stability of the threshing process, and improving the efficiency and effect of threshing.

[0019] 3. In this invention, by starting motor one, the rotating shaft is driven to rotate, which in turn drives the fixed ring and hammer head to rotate at high speed. The high-speed rotation of the hammer head can peel the corn kernels from the corn cob. The corn kernels and corn cob move downwards through the inclined cylinder and are discharged through the discharge port into the hopper. The corn kernels fall into the corn kernel hopper through the filter holes at the bottom of the hopper and slide down through the corn kernel hopper to be discharged. The corn cob slides down through the inner wall of the hopper to be discharged, realizing the separation of corn kernels and corn cob, which facilitates the subsequent classification and collection of corn kernels and corn cob. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the threshing shell of the present invention; Figure 3 This is a partial structural diagram of the corn kernel bin of the present invention; Figure 4 This is a partial structural diagram of the support frame of the present invention; Figure 5 This is a partial structural diagram of the silo of the present invention; Figure 6 This is a schematic diagram of a partial structure of the cylindrical body of the present invention; Figure 7 for Figure 6 A magnified structural diagram at point A; Figure 8This is a schematic diagram of a partial structure of the hammerhead of the present invention; Figure 9 This is a schematic diagram of a partial structure of the sleeve of the present invention.

[0021] The components include: 1. Machine body; 2. Harvesting table; 3. Feeding structure; 4. Tracked walking structure; 5. Threshing shell; 6. Threshing mechanism; 601. Support frame; 602. Corn kernel bin; 603. Hopper; 604. Fixing block; 605. Fixing base; 606. Cylinder; 607. Motor 1; 608. Rotating shaft; 609. Fixing ring; 610. Hammer; 611. Limiting ring; 612. Discharge port; 613. 3. Filter holes; 614. Feed hopper; 7. Auxiliary threshing assembly; 701. Support base; 702. Sleeve; 703. Piston; 704. Air inlet pipe; 705. Guide pipe; 706. Conveying hose; 707. Arc-shaped pipe; 708. Air outlet pipe; 709. Arc-shaped body; 710. Support column; 711. Motor II; 712. Cam; 713. Eccentric rod; 714. Swing rod; 715. Connecting seat. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 9 This invention provides a corn harvester with a low-damage threshing structure, including a machine body 1. A threshing shell 5 is installed on one side of the top of the machine body 1. A threshing mechanism 6 is provided inside the threshing shell 5. The threshing mechanism 6 includes a corn kernel bin 602. The outer wall of the corn kernel bin 602 is fixedly connected to the inner wall of the threshing shell 5. A feed bin 603 is provided inside the corn kernel bin 602. A fixing block 604 is installed at the bottom of the feed bin 603. A fixing seat 605 is rotatably connected to the top of the fixing block 604. A cylinder 606 is fixedly connected to the top of the fixed seat 605, and a support frame 601 is fixedly connected to the bottom inner wall of the threshing shell 5. The bottom of the cylinder 606 contacts the top of the support frame 601. A motor 607 is installed at one end of the cylinder 606. A rotating shaft 608 is fixedly connected to the output end of the motor 607. Fixed rings 609 are evenly fixedly connected to the outer wall of the rotating shaft 608. Hammers 610 are symmetrically arranged on the outer wall of the fixed rings 609. An auxiliary threshing assembly 7 is provided inside the support frame 601.

[0024] Specifically, the tracked walking structure 4 at the bottom of the machine body 1 drives the whole machine to move, the harvesting table 2 at one end of the machine body 1 completes the cutting of corn stalks, and the cut corn ears are conveyed to the feed hopper 614 of the threshing shell 5 through the feeding structure 3, and enter the cylinder 606 through the feed hopper 614 to realize the material conveying and feeding before threshing. During threshing, motor 607 is started, driving the rotating shaft 608 to rotate, which in turn drives the fixed ring 609 and hammer 610 to rotate at high speed. The high-speed rotation of the hammer 610 can remove the corn kernels from the corn cob. The corn kernels and corn cobs move downwards through the cylinder 606 and are discharged through the discharge port 612, falling into the hopper 603. The corn kernels fall into the corn kernel hopper 602 through the filter hole 613 at the bottom of the hopper 603 and slide down through the corn kernel hopper 602 for discharge. The corn cobs slide down through the inner wall of the hopper 603 for discharge, thus separating the corn kernels and corn cobs, which is convenient for subsequent classification and collection of corn kernels and corn cobs. By employing a high-speed rotating hammerhead 610, combined with the air blowing and vibration mechanisms within the auxiliary threshing assembly 7, the flow rate of corn within the cylinder 606 is effectively accelerated, and the residence time of corn within the cylinder 606 is shortened, thereby reducing the breakage rate of corn kernels and effectively improving the commercial quality and subsequent processing value of corn kernels.

[0025] Please see the appendix Figure 6 Appendix Figure 8 Limiting rings 611 are uniformly fixedly connected to the outer wall of the rotating shaft 608. Each fixed ring 609 is correspondingly set between two limiting rings 611. Filter holes 613 are uniformly opened at the bottom of the hopper 603.

[0026] Specifically, each fixing ring 609 and its matching hammer head 610 are limited between two limiting rings 611, which can effectively prevent the fixing ring 609 from axially shifting when the rotating shaft 608 rotates at high speed, so that the hammer head 610 always stays within the preset threshing operation range, ensuring that the impact of the hammer head 610 on the corn cob inside the cylinder 606 is more uniform, avoiding the problem of insufficient threshing and kernel residue in some areas due to the offset of the hammer head 610, and improving the overall threshing operation accuracy; The aperture of the filter hole 613 at the bottom of the hopper 603 is adapted to the size of the corn kernels. After threshing, the corn kernels can be screened through the filter hole 613 and fall into the outer corn kernel hopper 602, while the corn cob is blocked by the filter hole 613 and cannot pass through, thus achieving the separation of corn kernels and corn cob. The separation process does not require manual intervention and improves the kernel recovery rate.

[0027] Please see the appendix Figure 2 -Appendix Figure 6 One end of the cylinder 606 is provided with a discharge port 612, and the other end of the cylinder 606 is provided with a feed port. A feed hopper 614 is provided inside the feed port of the cylinder 606.

[0028] Specifically, by setting up the feed hopper 614, whole ears of corn can be fed into the cylinder 606 for threshing. By setting the discharge port 612, the threshed corn kernels and corn cobs can be discharged through the discharge port 612 and fall into the hopper 603 for screening.

[0029] Please see the appendix Figure 2 -Appendix Figure 9 The auxiliary threshing assembly 7 includes a support base 701, the bottom of which is fixedly connected to the inner wall of a support frame 601. A sleeve 702 is provided at the top of the support base 701, and a piston 703 is slidably connected inside the sleeve 702. A support column 710 is fixedly connected to the inner wall of the support frame 601, and a second motor 711 is mounted on the top of the support column 710. A rotating shaft is fixedly connected to the output end of the second motor 711, and a cam 712 is fixedly connected to the outer wall of the rotating shaft. The outer wall of the cam 712 contacts the bottom of the cylinder 606. An eccentric rod 713 is mounted on one side of the cam 712, and a swing rod 714 is provided on the outer wall of the eccentric rod 713. A connecting seat 715 is rotatably connected to the end of the swing rod 714 away from the eccentric rod 713, and one side of the connecting seat 715 is fixedly connected to one side of the piston 703. An air inlet pipe 704 is fixedly connected to the top of the sleeve 702. A solenoid valve is installed on the outer wall of the air inlet pipe 704. A guide pipe 705 is fixedly connected to one side of the sleeve 702. An air outlet pipe 708 is evenly fixedly connected to the end of the cylinder 606 away from the motor 607. An arc-shaped body 709 is fixedly connected to the inner wall of the cylinder 606. One end of the air outlet pipe 708 is located inside the arc-shaped body 709. Air outlet holes are evenly opened inside the arc-shaped body 709. The air outlet holes of the arc-shaped body 709 correspond one-to-one with the air outlet pipe 708. An arc-shaped pipe 707 is fixedly connected to the other end of the air outlet pipe 708. A conveying hose 706 is fixedly connected to the middle of the arc-shaped pipe 707. The end of the conveying hose 706 away from the arc-shaped pipe 707 is fixedly connected to one end of the guide pipe 705. A solenoid valve is installed on one side of the conveying hose 706.

[0030] Specifically, during the threshing process, motor 711 is started, driving the rotating shaft to rotate. The rotating shaft drives cam 712 to rotate back and forth. Cam 712 drives swing rod 714 to swing back and forth through eccentric rod 713. Swing rod 714 pushes piston 703 to slide back and forth in sleeve 702. When piston 703 moves closer to cam 712, solenoid valve 1 opens and solenoid valve 2 closes. External gas is drawn into sleeve 702 through air inlet pipe 704. When piston 703 moves away from cam 712, solenoid valve 1 closes and solenoid valve 2 opens. Gas in sleeve 702 enters conveying hose 706 through guide pipe 705, and then flows into arc pipe 707. Gas in arc pipe 707 flows into multiple air outlet pipes 708 and is blown into cylinder 606 through air outlet pipes 708. Blowing air can accelerate the flow of corn, shorten the residence time of corn in cylinder 606, and reduce the corn breakage rate. While the cam 712 reciprocates, it causes the cylinder 606 to vibrate up and down around the rotational connection point between the fixed block 604 and the fixed seat 605, further accelerating the flow rate of corn, shortening the residence time, and further reducing the corn breakage rate. At the same time, the vibration function of the cylinder 606 can effectively prevent the accumulation of corn during the threshing process, avoid insufficient threshing caused by material accumulation, ensure the continuity and stability of the threshing process, and improve the efficiency and effect of threshing.

[0031] Please see the appendix Figure 1 A harvesting platform 2 is provided at one end of the machine body 1, and a feeding structure 3 is provided on one side of the harvesting platform 2. One end of the feeding structure 3 is fixedly connected to one side of the threshing shell 5. Tracked walking structures 4 are symmetrically provided at the bottom of the machine body 1.

[0032] Specifically, the harvesting platform 2, the feeding structure 3, and the threshing shell 5 are arranged sequentially along the working direction of the machine body 1, and the two ends of the feeding structure 3 are precisely fixedly connected to the harvesting platform 2 and the threshing shell 5 respectively, forming a continuous production line for field cutting, ear conveying, and threshing. After the corn ears are cut and separated by the harvesting platform 2, they can be directly conveyed to the threshing mechanism 6 through the feeding structure 3 without manual transfer, completely eliminating the waiting and connection gaps between each process, greatly improving the field operation efficiency of the whole machine, and adapting to the operation needs of large-scale corn harvesting. The bottom of the machine body 1 is symmetrically equipped with tracked walking structure 4. Compared with the traditional wheeled walking structure, the track has a larger contact area with the ground, which can effectively prevent the equipment from slipping or getting stuck in muddy, low-lying, uneven fields. It is suitable for various planting terrains such as plains, hills, and slopes. At the same time, the anti-slip and anti-rollover design of the track can ensure that the equipment moves at a uniform speed and smoothly, making the cutting operation of the harvesting platform 2 and the conveying operation of the feeding structure 3 more stable, avoiding problems such as cutting deviation and ear drop caused by the shaking of the machine body 1.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corn harvester with a low-damage threshing structure, comprising a machine body (1), characterized in that: A threshing shell (5) is installed on one side of the top of the machine body (1). A threshing mechanism (6) is provided inside the threshing shell (5). The threshing mechanism (6) includes a corn kernel bin (602). The outer wall of the corn kernel bin (602) is fixedly connected to the inner wall of the threshing shell (5). A hopper (603) is provided inside the corn kernel bin (602). A fixing block (604) is installed at the bottom of the hopper (603). A fixing seat (605) is rotatably connected to the top of the fixing block (604). A cylinder is fixedly connected to the top of the fixing seat (605). (606) A support frame (601) is fixedly connected to the bottom inner wall of the threshing shell (5). The bottom of the cylinder (606) is in contact with the top of the support frame (601). A motor (607) is installed at one end of the cylinder (606). A rotating shaft (608) is fixedly connected to the output end of the motor (607). A fixing ring (609) is evenly fixedly connected to the outer wall of the rotating shaft (608). Hammers (610) are symmetrically arranged on the outer wall of the fixing ring (609). An auxiliary threshing assembly (7) is provided inside the support frame (601).

2. A corn harvester with a low-damage threshing structure according to claim 1, characterized in that: The outer wall of the rotating shaft (608) is uniformly fixedly connected with limiting rings (611), and each fixed ring (609) is correspondingly arranged between two limiting rings (611). The bottom of the hopper (603) is uniformly provided with filter holes (613).

3. A corn harvester with a low-damage threshing structure according to claim 1, characterized in that: The cylinder (606) has a discharge port (612) at one end and a feed port at the other end. A feed hopper (614) is provided inside the feed port of the cylinder (606).

4. A corn harvester with a low-damage threshing structure according to claim 1, characterized in that: The auxiliary threshing assembly (7) includes a support base (701), the bottom of which is fixedly connected to the inner wall of the support frame (601), and a sleeve (702) is provided on the top of the support base (701). A piston (703) is slidably connected inside the sleeve (702).

5. A corn harvester with a low-damage threshing structure according to claim 4, characterized in that: The inner wall of the support frame (601) is fixedly connected to a support column (710), and a second motor (711) is installed on the top of the support column (710). The output end of the second motor (711) is fixedly connected to a rotating shaft, and a cam (712) is fixedly connected to the outer wall of the rotating shaft. The outer wall of the cam (712) is in contact with the bottom of the cylinder (606).

6. A corn harvester with a low-damage threshing structure according to claim 5, characterized in that: An eccentric rod (713) is installed on one side of the cam (712), and a swing rod (714) is provided on the outer wall of the eccentric rod (713). A connecting seat (715) is rotatably connected to one end of the swing rod (714) away from the eccentric rod (713), and one side of the connecting seat (715) is fixedly connected to one side of the piston (703).

7. A corn harvester with a low-damage threshing structure according to claim 4, characterized in that: An air inlet pipe (704) is fixedly connected to the top of the sleeve (702), and a solenoid valve is provided on the outer wall of the air inlet pipe (704). A guide pipe (705) is fixedly connected to one side of the sleeve (702).

8. A corn harvester with a low-damage threshing structure according to claim 4, characterized in that: An air outlet pipe (708) is uniformly fixedly connected to one end of the cylinder (606) away from the motor (607). An arc-shaped body (709) is fixedly connected to the inner wall of the cylinder (606). One end of the air outlet pipe (708) is located inside the arc-shaped body (709). Air outlet holes are uniformly opened inside the arc-shaped body (709). The air outlet holes of the arc-shaped body (709) correspond one-to-one with the air outlet pipe (708).

9. A corn harvester with a low-damage threshing structure according to claim 8, characterized in that: The other end of the air outlet pipe (708) is fixedly connected to an arc-shaped pipe (707), and a delivery hose (706) is fixedly connected to the middle of the arc-shaped pipe (707). The end of the delivery hose (706) away from the arc-shaped pipe (707) is fixedly connected to one end of the guide pipe (705). A solenoid valve is provided on one side of the delivery hose (706).

10. A corn harvester with a low-damage threshing structure according to claim 1, characterized in that: A harvesting platform (2) is provided at one end of the machine body (1), and a feeding structure (3) is provided on one side of the harvesting platform (2). One end of the feeding structure (3) is fixedly connected to one side of the threshing shell (5). A tracked walking structure (4) is symmetrically provided at the bottom of the machine body (1).

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