A corn harvester and a method of operation thereof

Abstract

The present application relates to the field of corn harvester, and discloses a corn harvester and a working method thereof, which solves the problem that the current corn harvester is not easy to sort tender corn and old corn in corn, and comprises a corn harvesting vehicle, a corn separating assembly is arranged in the corn harvesting vehicle, a corn sorting assembly is arranged in the corn harvesting vehicle, the corn separating assembly is located above the corn sorting assembly, the corn separating assembly is used for separating corn from corn stalks, and the corn sorting assembly is used for sorting the separated corn according to the tenderness, the corn sorting assembly comprises two side plates, and a sorting treatment piece is arranged between the two side plates, the conveying belt is divided into a horizontal section and an inclined section, the surfaces of the horizontal section and the inclined section are uniformly provided with thorn needles, when the tender corn falls on the conveying belt, the thorn needles pierce into the corn, the tender corn moves synchronously with the conveying belt, and when the old corn falls on the conveying belt, the old corn can only roll down along the inclined section, so that the corn is sorted.

Description

Technical Field

[0001] This invention belongs to the field of corn harvesters, specifically a corn harvester and its working method. Background Technology

[0002] A corn harvester is a device that processes corn when it is mature or nearly mature. It mainly consists of a walking system, an electrical system, and a harvesting system. The walking system includes an engine and transmission, providing power and enabling the machine to move. The electrical system includes a power supply, starting device, and lighting device, ensuring the operation of all electrical equipment. The harvesting system's header section, composed of dividers, a chain conveyor, stalk pullers, and ear-picking plates, is responsible for harvesting and ear-picking the corn. However, it still has the following drawbacks:

[0003] Depending on whether the corn is young or old, young corn can be eaten, while old corn is generally used to make feed. During the corn harvesting process, it is not easy to separate young corn from old corn, so manual sorting is still required after the harvest, which is quite troublesome. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a corn harvester and its working method, which effectively solves the problem that current corn harvesters are not good at separating tender corn from old corn.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corn harvester, comprising a corn harvesting vehicle, wherein a corn separation component is provided inside the corn harvesting vehicle, and a corn sorting component is provided inside the corn harvesting vehicle, with the corn separation component located above the corn sorting component;

[0006] The corn separation component is used to separate corn from the corn stalks, and the corn sorting component is used to sort the separated corn by its maturity.

[0007] The corn sorting assembly includes two side plates, with a sorting processing component between the two side plates. Connecting plates are installed at both ends of the side plates, and the connecting plates are fixedly connected to the inner wall of the corn harvesting vehicle.

[0008] The sorting and processing unit includes a conveyor belt with barbs evenly installed on its outer surface. The conveyor belt consists of two parts: a horizontal section and an inclined section. Corn falls from the top of the inclined section. When the corn is old, the barbs cannot penetrate it, and the corn rolls down the inclined section. When the corn is young, the barbs penetrate it, and the corn moves towards the horizontal section with the conveyor belt. A vibrating discharge device is installed on the inner side of the conveyor belt.

[0009] Preferably, a drive roller and a driven roller are provided between the two side plates, wherein the drive roller is located inside the end of the horizontal section of the conveyor belt, and the driven roller is located inside the end of the inclined section of the conveyor belt. One end of the drive roller is fixedly connected to the output shaft of the rotating motor, and the rotating motor is fixedly installed on the side plate. A support and limiting roller is installed between the two side plates to support and limit the conveyor belt.

[0010] Preferably, the vibrating unloading component includes a horizontal box disposed inside the horizontal section of the conveyor belt. The horizontal box is fixedly connected to the side plate. A piston block is movably installed inside the horizontal box. A spring is installed on the side of the piston block near the drive belt roller. One end of the spring extends through to the outside of the horizontal box. A pressure rod is symmetrically installed on the side of the piston block near the spring. One end of the pressure rod is fixedly connected to the inner wall of the end of the horizontal box. A buffer protection component is installed on the outside of the horizontal box.

[0011] Preferably, a transverse vibrating rod is installed on the other side of the piston block, one end of which extends through to the outside of the horizontal box and corresponds to the inner wall of the inclined section of the conveyor belt. A bottom box is installed at the bottom of the horizontal box, and a longitudinal vibrating rod is slidably installed on the bottom wall of the bottom box. A connecting rod is hinged to the top of the longitudinal vibrating rod, and one end of the connecting rod is hinged to the piston block.

[0012] Preferably, the active belt roller has a mounting groove in the middle, a cam is installed in the mounting groove, and the end of the spring contacts the outer wall of the cam.

[0013] Preferably, the buffer protection component includes side tubes symmetrically installed on both sides of the vibrating feeder, the piston block divides the inner cavity of the horizontal box into two air chambers, the two side tubes on the same side are respectively connected to the two air chambers, a first connecting pipe is installed between the two side tubes on the same side, an exhaust pipe is installed between the two connecting plates near the bottom of the inclined section of the conveyor belt, nozzles are equidistantly installed on the side of the exhaust pipe near the conveyor belt, and the two first connecting pipes are respectively connected to the two ends of the exhaust pipe.

[0014] Preferably, the top of the horizontal box is equipped with two air inlet pipes, which are respectively connected to two air chambers of the horizontal box. An air inlet check valve is installed on the air inlet pipe, which is used to allow only outside air to enter the air chamber. An exhaust check valve is installed on the second connecting pipe, which is used to allow only air in the air chamber to be discharged.

[0015] Preferably, the corn separating component includes an inclined plate fixedly installed inside the corn harvester. Two pressure rollers are symmetrically rotatably installed between the inclined plate and the inner top wall of the corn harvester. Guide plates are symmetrically installed at the top of the inclined plate, forming a corn rolling channel between the two guide plates. The outlet of the corn rolling channel is located above the top of the inclined section of the conveyor belt. A top gear is coaxially installed at the top of the pressure rollers. The two top gears mesh with each other. One side of one of the top gears is meshed with a drive gear. The drive gear is fixedly connected to the output shaft of the drive motor. The drive motor is fixedly installed on a motor mounting bracket, which is fixedly installed on the top of the corn harvester.

[0016] Preferably, the bottom of the inner cavity of the corn harvester is provided with a tender corn storage box, an old corn storage box and a corn stalk storage box. The tender corn storage box is located below the end of the horizontal section of the conveyor belt away from its inclined section, the old corn storage box is located below the bottom of the inclined section of the conveyor belt, and the corn stalk storage box is located below the end of the inclined plate away from the tender corn storage box.

[0017] A preferred method for operating a corn harvester is as follows:

[0018] S1. Corn Separation: The corn stalks are passed through the gap between two pressure rollers. Under pressure, the corn on the corn stalks is separated from the corn stalks and then rolls from the inclined plate to the top of the inclined section of the conveyor belt.

[0019] S2, Corn sorting: Tender corn falls onto the conveyor belt and is pierced by needles, moving synchronously with the conveyor belt, while old corn rolls down the inclined section of the conveyor belt directly;

[0020] S3. Storage: Tender corn is taken into tender corn storage box, mature corn is taken into mature corn storage box, and corn stalks are taken into corn stalk storage box.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The invention divides the conveyor belt into horizontal and inclined sections, and the surface of the conveyor belt is evenly provided with needles. When tender corn falls on the conveyor belt, the needles penetrate the corn and the tender corn moves synchronously with the conveyor belt. When old corn falls on the conveyor belt, it can only roll down along the inclined section, thereby sorting the corn.

[0023] (2) The invention drives the conveyor belt to move while the active belt roller rotates, thereby driving the cam to rotate, which in turn drives the piston block to move laterally back and forth. On the one hand, it drives the transverse vibrating rod to vibrate the inclined section of the conveyor belt, making it easier for old corn to roll off and be discharged. On the other hand, it drives the longitudinal vibrating rod to vibrate the bottom wall of the horizontal section of the conveyor belt, making it easier for tender corn to separate from the needles and be discharged.

[0024] (3) The invention divides the interior of the horizontal box into two air chambers by a piston block and guides the air flow through an intake one-way valve and an exhaust pipe. During the reciprocating movement of the piston block, the air in one side of the air chamber is pushed out from the nozzle, thereby buffering and slowing down the old corn during the falling process and protecting the old corn. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the corn harvester structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the corn separation component structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the corn sorting component structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the conveyor belt structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the drive device structure for the conveyor belt of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the horizontal box of the present invention;

[0033] Figure 7 This is a schematic diagram of the buffer protection component structure of the present invention;

[0034] In the diagram: 1. Corn harvesting vehicle; 2. Young corn storage box; 3. Old corn storage box; 4. Corn separation assembly; 401. Inclined plate; 402. Guide plate; 403. Pressure roller; 404. Top gear; 405. Drive gear; 406. Drive motor; 5. Corn sorting assembly; 501. Side plate; 502. Connecting plate; 503. Sorting processing component; 5031. Conveyor belt; 5032. Needle; 5033. Driven belt roller; 5034. Rotating motor; 5035. Driven belt roller; 5036. Support and limit roller; 504. Vibrating feeding component; 5041, cam; 5042, horizontal box; 5043, piston block; 5044, pressure rod; 5045, spring; 5046, transverse vibrating rod; 5047, bottom box; 5048, longitudinal vibrating rod; 5049, connecting rod; 505, buffer protection component; 5051, side tube; 5052, air inlet pipe; 5053, air inlet check valve; 5054, first connecting pipe; 5055, second connecting pipe; 5056, exhaust pipe; 5057, nozzle; 5058, exhaust check valve; 6. Corn stalk storage box. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Depend on Figures 1-7 A corn harvester is provided, including a corn harvesting vehicle 1, a corn separation component 4 and a corn sorting component 5 are provided inside the corn harvesting vehicle 1, the corn separation component 4 is located above the corn sorting component 5, the corn separation component 4 is used to separate corn from corn stalks, and the corn sorting component 5 is used to sort the separated corn by its maturity.

[0037] The corn sorting assembly 5 includes two side plates 501, and a sorting processing component 503 is provided between the two side plates 501. A connecting plate 502 is installed at both ends of the side plates 501, and the connecting plate 502 is fixedly connected to the inner wall of the corn harvesting vehicle 1.

[0038] The sorting and processing unit 503 includes a conveyor belt 5031. Needles 5032 are evenly installed on the outer surface of the conveyor belt 5031. The conveyor belt 5031 consists of a horizontal section and an inclined section. Corn falls from above the top of the inclined section. When the corn is old, the needles 5032 cannot penetrate it, and the corn rolls down the inclined section. When the corn is young, the needles 5032 penetrate it, and the corn moves towards the horizontal section with the conveyor belt 5031. A vibrating discharge unit 504 is provided on the inner side of the conveyor belt 5031. A drive roller 5033 and a driven roller 5035 are arranged between the two side plates 501. The drive roller 5033 is located inside the end of the horizontal section of the conveyor belt 5031. The driven roller 5035 is located inside the inclined section end of the conveyor belt 5031. One end of the driving roller 5033 is fixedly connected to the output shaft of the rotating motor 5034. The rotating motor 5034 is fixedly installed on the side plate 501. A support and limiting roller 5036 is installed between the two side plates 501. The support and limiting roller 5036 supports and limits the conveyor belt 5031. The conveyor belt 5031 is divided into a horizontal section and an inclined section. Its surface is evenly provided with barbs 5032. When tender corn falls on the conveyor belt 5031, the barbs 5032 penetrate the corn. The tender corn moves synchronously with the conveyor belt 5031. When old corn falls on the conveyor belt 5031, it can only roll down along the inclined section, thereby sorting the corn.

[0039] The vibrating feeding component 504 includes a horizontal box 5042 disposed inside the horizontal section of the conveyor belt 5031. The horizontal box 5042 is fixedly connected to the side plate 501. A piston block 5043 is movably installed inside the horizontal box 5042. A spring 5045 is installed on the side of the piston block 5043 near the drive roller 5033. One end of the spring 5045 extends to the outside of the horizontal box 5042. A pressure rod 5044 is symmetrically installed on the side of the piston block 5043 near the spring 5045. One end of the pressure rod 5044 is fixedly connected to the inner wall of the end of the horizontal box 5042. A buffer protection component 505 is installed on the outside of the horizontal box 5042. A transverse vibrating rod 5046 is installed on the other side of the piston block 5043. One end of the transverse vibrating rod 5046 extends to the outside of the horizontal box 5042, and one end of the transverse vibrating rod 5046 corresponds to the inner wall of the inclined section of the conveyor belt 5031. A bottom box 5047 is installed at the bottom end of the horizontal box 5042. A longitudinal vibrating rod 5048 is slidably installed on the bottom wall of the bottom box 5047. A connecting rod 5049 is hinged to the top of the longitudinal vibrating rod 5048. One end of the connecting rod 5049 is hinged to the piston block 5043. An installation groove is opened in the middle of the drive roller 5033. A cam 5041 is installed in the installation groove. The end of the spring 5045 contacts the outer wall of the cam 5041. When the drive roller 5033 rotates, it drives the conveyor belt 5031 to move and drives the cam 5041 to rotate, thereby pushing the piston block 5043 to move laterally back and forth. On the one hand, it drives the transverse vibrating rod 5046 to vibrate the inclined section of the conveyor belt 5031 to facilitate the rolling and feeding of old corn. On the other hand, it drives the longitudinal vibrating rod 5048 to vibrate the bottom wall of the horizontal section of the conveyor belt 5031 to facilitate the separation and feeding of tender corn from the needles 5032.

[0040] The buffer protection component 505 includes side pipes 5051 symmetrically installed on both sides of the vibrating feeder 504. A piston block 5043 divides the inner cavity of the horizontal box 5042 into two air chambers. The two side pipes 5051 on the same side are connected to the two air chambers respectively. A first connecting pipe 5054 is installed between the two side pipes 5051 on the same side. An exhaust pipe 5056 is installed between two connecting plates 502 near the bottom of the inclined section of the conveyor belt 5031. Nozzles 5057 are equidistantly installed on the side of the exhaust pipe 5056 near the conveyor belt 5031. Two first connecting pipes 5054 are connected to both ends of the exhaust pipe 5056 respectively. Two air inlet pipes 5052 are installed at the top of the horizontal box 5042. The air pipe 5052 is connected to the two air chambers of the horizontal box 5042. An air inlet check valve 5053 is installed on the air inlet pipe 5052. The air inlet check valve 5053 is used to allow only outside air to enter the air chamber. An exhaust check valve 5058 is installed on the second connecting pipe 5055. The exhaust check valve 5058 is used to allow only the air in the air chamber to be discharged. The piston block 5043 divides the interior of the horizontal box 5042 into two air chambers and guides the air flow through the air inlet check valve 5053 and the exhaust pipe 5056. During the lateral reciprocating movement of the piston block 5043, the air in one side of the air chamber is pushed out from the nozzle 5057, thereby buffering and slowing down the old corn during the falling process and protecting the old corn.

[0041] The corn separating component 4 includes an inclined plate 401 fixedly installed inside the corn harvesting vehicle 1. Two pressure rollers 403 are symmetrically rotatably installed between the inclined plate 401 and the inner top wall of the corn harvesting vehicle 1. Guide plates 402 are symmetrically installed at the top of the inclined plate 401, forming a corn rolling channel between the two guide plates 402. The outlet of the corn rolling channel is located above the top of the inclined section of the conveyor belt 5031. A top gear 404 is coaxially installed at the top of the pressure roller 403. The two top gears 404 mesh with each other. One side of one of the top gears 404 is meshed with a drive gear 405. The drive gear 405 is fixedly connected to the output shaft of the drive motor 406. The drive motor 406 is fixedly installed on the motor mounting bracket, which is fixedly installed at the top of the corn harvesting vehicle 1. When the corn stalk passes between the two pressure rollers 403, the corn on the corn stalk is separated from the corn stalk by pressure.

[0042] The bottom of the inner cavity of the corn harvester 1 is equipped with a tender corn storage box 2, an old corn storage box 3, and a corn stalk storage box 6. The tender corn storage box 2 is located below the horizontal section of the conveyor belt 5031 away from its inclined section. The old corn storage box 3 is located below the bottom of the inclined section of the conveyor belt 5031. The corn stalk storage box 6 is located below the inclined plate 401 away from the end of the tender corn storage box 2.

[0043] Working principle: When in use, the drive motor 406 is turned on, which drives the drive gear 405 to rotate. The drive gear 405 meshes with one of the top gears 404, and the two top gears 404 mesh at the same time, causing the two pressure rollers 403 to rotate relative to each other. The corn stalks that have not been picked are continuously passed between the two pressure rollers 403. Since the corn cannot pass through the gap between the two pressure rollers 403, under the action of pressure, the corn is separated from the corn stalks and falls onto the inclined plate 401. The corn slides down the inclined plate 401 and slides down through the corn rolling channel formed by the two guide plates 402. The end of the corn rolling channel is located above the top of the inclined section of the conveyor belt 5031, so that the corn falls down to the top position of the inclined section of the conveyor belt 5031.

[0044] When the corn is tender, the needles 5032 on the surface of the conveyor belt 5031 can penetrate into the tender corn because the tender corn has a high water content and low density. When the corn is old, the needles 5032 cannot penetrate into the old corn because the old corn has a low water content and high density.

[0045] Simultaneously, driven by the rotating motor 5034, the active belt roller 5033 rotates counterclockwise, causing the conveyor belt 5031 to move from the inclined section to the horizontal section. This allows the needles 5032 to carry the tender corn towards the tender corn storage box 2. When the tender corn is facing down, it separates from the needles 5032 under the action of gravity and falls into the tender corn storage box 2. Meanwhile, the old corn rolls down the inclined section of the conveyor belt 5031 under its own gravity into the old corn storage box 3, thus completing the sorting of the corn.

[0046] Meanwhile, as the active belt roller 5033 rotates, it drives the cam 5041 to rotate. Under the combined action of the pressure of the cam 5041 and the elasticity of the pressure rod 5044, the piston block 5043 moves back and forth continuously inside the horizontal box 5042. During the movement, the transverse vibrating rod 5046 vibrates the inclined section of the conveyor belt 5031 to prevent the old corn from rolling down and being obstructed. At the same time, the connecting rod 5049 drives the longitudinal vibrating rod 5048 to move back and forth longitudinally, continuously vibrating the bottom wall of the horizontal section of the conveyor belt 5031 to ensure the feeding of tender corn.

[0047] During the reciprocating lateral movement of piston block 5043, when piston block 5043 moves towards the side of lateral vibrating rod 5046, under the one-way passage action of intake check valve 5053, outside air enters one side air chamber of horizontal box 5042 through intake pipe 5052 away from lateral vibrating rod 5046, and through exhaust check valve 5058, the air in the air chamber near lateral vibrating rod 5046 is pushed into exhaust pipe 5056 and sprayed out from nozzle 5057. When piston block 5043 moves back, outside air enters the corresponding side air chamber inside horizontal box 5042 through intake pipe 5052 on the other side, and the air in the other side air chamber is pushed out from nozzle 5057. The spraying end of nozzle 5057 is set upward towards the bottom of the inclined section of conveyor belt 5031, so that the sprayed air can buffer and decelerate the corn, protecting the old corn.

[0048] During the sorting process, tender corn is stored in tender corn storage box 2, old corn is stored in old corn storage box 3, and corn stalks fall into corn stalk storage box 6.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] 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, comprising a corn harvesting vehicle (1), characterized in that: The corn harvester (1) is equipped with a corn separation component (4) and a corn sorting component (5). The corn separation component (4) is located above the corn sorting component (5). The corn separation component (4) is used to separate corn from the corn stalk, and the corn sorting component (5) is used to sort the separated corn by its age. The corn sorting assembly (5) includes two side plates (501), a sorting processing component (503) is provided between the two side plates (501), and a connecting plate (502) is installed at both ends of the side plates (501). The connecting plate (502) is fixedly connected to the inner wall of the corn harvesting vehicle (1). The sorting and processing unit (503) includes a conveyor belt (5031). The outer surface of the conveyor belt (5031) is uniformly equipped with barbs (5032). The conveyor belt (5031) consists of two parts: a horizontal section and an inclined section. Corn falls from the top of the inclined section. When the corn is old corn, the barbs (5032) cannot penetrate the corn, and the corn rolls down along the inclined section. When the corn is young corn, the barbs (5032) penetrate the corn, and the corn moves towards its horizontal section along the conveyor belt (5031). The inner side of the conveyor belt (5031) is provided with a vibrating feeding component (504).

2. A corn harvester according to claim 1, characterized in that: An active belt roller (5033) and a driven belt roller (5035) are provided between the two side plates (501). The active belt roller (5033) is located inside the end of the horizontal section of the conveyor belt (5031), and the driven belt roller (5035) is located inside the end of the inclined section of the conveyor belt (5031). One end of the active belt roller (5033) is fixedly connected to the output shaft of the rotating motor (5034). The rotating motor (5034) is fixedly installed on the side plate (501). A support limiting roller (5036) is installed between the two side plates (501) to support and limit the conveyor belt (5031).

3. A corn harvester according to claim 1, characterized in that: The vibrating feeding component (504) includes a horizontal box (5042) disposed inside the horizontal section of the conveyor belt (5031). The horizontal box (5042) is fixedly connected to the side plate (501). A piston block (5043) is movably installed inside the horizontal box (5042). A spring (5045) is installed on the side of the piston block (5043) near the drive belt roller (5033). One end of the spring (5045) extends through to the outside of the horizontal box (5042). A pressure rod (5044) is symmetrically installed on the side of the piston block (5043) near the spring (5045). One end of the pressure rod (5044) is fixedly connected to the inner wall of the end of the horizontal box (5042). A buffer protection component (505) is installed on the outside of the horizontal box (5042).

4. A corn harvester according to claim 3, characterized in that: A transverse vibrating rod (5046) is installed on the other side of the piston block (5043). One end of the transverse vibrating rod (5046) extends through to the outside of the horizontal box (5042). One end of the transverse vibrating rod (5046) corresponds to the inner wall of the inclined section of the conveyor belt (5031). A bottom box (5047) is installed at the bottom end of the horizontal box (5042). A longitudinal vibrating rod (5048) is longitudinally slidably installed on the bottom wall of the bottom box (5047). A connecting rod (5049) is hinged to the top of the longitudinal vibrating rod (5048). One end of the connecting rod (5049) is hinged to the piston block (5043).

5. A corn harvester according to claim 2, characterized in that: The active belt roller (5033) has a mounting groove in the middle, and a cam (5041) is installed in the mounting groove. The end of the spring (5045) contacts the outer wall of the cam (5041).

6. A corn harvester according to claim 3, characterized in that: The buffer protection component (505) includes side tubes (5051) symmetrically installed on both sides of the vibrating feeder (504). The piston block (5043) divides the inner cavity of the horizontal box (5042) into two air chambers. The two side tubes (5051) on the same side are connected to the two air chambers respectively. A first connecting pipe (5054) is installed between the two side tubes (5051) on the same side. An exhaust pipe (5056) is installed between the two connecting plates (502) near the bottom of the inclined section of the conveyor belt (5031). A nozzle (5057) is installed at equal intervals on the side of the exhaust pipe (5056) near the conveyor belt (5031). The two first connecting pipes (5054) are connected to the two ends of the exhaust pipe (5056) respectively.

7. A corn harvester according to claim 3, characterized in that: The top of the horizontal box (5042) is equipped with two air inlet pipes (5052), which are respectively connected to two air chambers of the horizontal box (5042). An air inlet check valve (5053) is installed on the air inlet pipe (5052), which is used to allow only outside air to enter the air chamber. An exhaust check valve (5058) is installed on the second connecting pipe (5055), which is used to allow only the air in the air chamber to be discharged.

8. A corn harvester according to claim 1, characterized in that: The corn separation component (4) includes an inclined plate (401) fixedly installed inside the corn harvester (1). Two pressure rollers (403) are symmetrically rotated between the inclined plate (401) and the inner top wall of the corn harvester (1). A guide plate (402) is symmetrically installed at the top of the inclined plate (401). A corn rolling channel is formed between the two guide plates (402). The outlet of the corn rolling channel is located above the top of the inclined section of the conveyor belt (5031). A top gear (404) is coaxially installed at the top of the pressure roller (403). The two top gears (404) mesh with each other. One side of one of the top gears (404) is meshed with a drive gear (405). The drive gear (405) is fixedly connected to the output shaft of the drive motor (406). The drive motor (406) is fixedly installed on the motor mounting bracket. The motor mounting bracket is fixedly installed on the top of the corn harvester (1).

9. A corn harvester according to claim 1, characterized in that: The corn harvester (1) has a tender corn storage box (2), an old corn storage box (3) and a corn stalk storage box (6) at the bottom of its inner cavity. The tender corn storage box (2) is located below the horizontal section of the conveyor belt (5031) away from its inclined section. The old corn storage box (3) is located below the bottom of the inclined section of the conveyor belt (5031). The corn stalk storage box (6) is located below the inclined plate (401) away from the tender corn storage box (2).

10. A method for operating a corn harvester according to any one of claims 1-9, characterized in that, The working method is as follows: S1. Corn separation: The corn stalks are passed through the gap between two pressure rollers (403). The corn on the corn stalks is separated from the corn stalks under pressure and then rolls from the inclined plate (401) to the top of the inclined section of the conveyor belt (5031). S2, Corn sorting: Tender corn falls onto the conveyor belt (5031) and is pierced by needles (5032), moving synchronously with the conveyor belt (5031), while old corn rolls down directly along the inclined section of the conveyor belt (5031). S3, Storage: Tender corn is brought into tender corn storage box (2), old corn is brought into old corn storage box (3), and corn stalks are brought into corn stalk storage box (6).

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