Bract crushing device for corn harvester

Abstract

The invention relates to the technical field of agricultural machinery, and provides a bract crushing device for a corn harvester, which comprises a crusher, a fixed plate and a support plate, a smashing roller is installed in the smashing machine, a differential assembly is installed on one side of the smashing machine, a fixing plate is installed at one end of the smashing machine, and an auxiliary structure is arranged at the top end of a supporting plate. When bracts make contact with the extrusion roller, firstly, the water absorption sponge on the surface of the extrusion roller can extrude the bracts, the water absorption sponge has the flexible deformation capacity and can be tightly attached to the surfaces of the bracts or even embedded into wrinkles during extrusion, water in the wrinkles is adsorbed into a cotton body, and water drops on the surfaces of the bracts are cleaned; the diameter of the cotton body ranges from 0.1 mm to 0.5 mm, a physical barrier layer can be formed, impurities in bracts can be intercepted on the surface of the cotton body even if the diameter of the impurities is smaller than 1 mm, the impurities cannot make contact with the water absorption holes in the surface of the extrusion roller, equivalently, a pre-filtering process is added to the water absorption holes, and the situation that the residual impurities block the water absorption holes and affect the adsorption effect is avoided.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a husk crushing device for a corn harvester. Background Technology

[0002] Corn, also known as maize, is one of the three major grain crops. During the corn harvesting process, corn harvesters are generally used. Corn harvesters are agricultural machines used to complete multiple operations such as ear picking, stalk cutting, peeling, threshing, straw processing, and rotary tillage when corn is ripe. When harvesting corn, it is also necessary to crush the corn husks, which is done using the corn harvester's husk crushing device. However, traditional corn harvester husk crushing devices still have some problems during use. When harvesting corn, if the air is humid, water droplets easily accumulate on the surface of the husks, causing them to become damp. When encountering husks with water droplets on their surface, the damp husks in traditional corn harvester husk crushing devices will stick to the surface of the toothed rollers, filling the gaps between the teeth and forming a sticky coating. Initially, this prevents the teeth from engaging and shearing (material slippage). Later, the accumulated sticky husks will get stuck between the two rollers, causing the roller speed to drop sharply and affecting the crushing effect. Therefore, a husk crushing device for corn harvesters is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a husk crushing device for corn harvesters, which solves the problem that existing corn harvester husk crushing devices are inconvenient to clean the moisture off the surface of wet husks when crushing them. This causes the wet husks to stick to the surface of the toothed rollers, fill the gaps between the teeth, and form a sticky coating. Initially, this prevents the teeth from engaging and shearing (material slippage). Later, the accumulated sticky husks get stuck between the two rollers, causing the roller speed to drop sharply and affecting the crushing effect.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a husk crushing device for a corn harvester, comprising a crusher, a fixed plate and a support plate; The crusher is equipped with a crushing roller inside, a differential speed assembly is installed on one side of the crusher, a fixed plate is installed at one end of the crusher, a support plate is installed at the top of the fixed plate, and an auxiliary structure is provided at the top of the support plate. The auxiliary structure includes a conveying assembly mounted on the top of a support plate. Baffles are installed on both sides of the top of the conveying assembly. Movable grooves are formed inside the baffles. A movable seat is installed inside the movable grooves. A squeezing roller is installed at the middle position of the movable seat. Water absorption holes are formed on the surface of the squeezing roller. A water-absorbing sponge is installed on the outside of the squeezing roller. A connecting pipe is rotatably sealed at one end of the squeezing roller. A collection box is installed at one end of the connecting pipe. A collection container is installed inside the collection box. A suction fan is installed on one side of the collection box.

[0005] Preferably, the baffle has a through groove inside, and a rotating rod is installed inside the through groove. The bottom end of the rotating rod is connected to the top end of the movable seat, and the through groove and the rotating rod are threaded together.

[0006] Preferably, the water suction holes are provided in multiple sets, and the multiple sets of water suction holes are distributed in a ring on the outer side of the extrusion roller.

[0007] Preferably, a screening and dewatering structure is provided on one side of the top of the support plate. The screening and dewatering structure includes a screening frame, which is installed on one side of the top of the support plate. A screening screen is installed inside the screening frame. An installation box is installed on one side of the bottom of the screening frame. A first reciprocating screw is installed inside the installation box. A first thread sleeve is installed on the outside of the first reciprocating screw. A connecting block is installed on one side of the first thread sleeve. A cleaning roller is movably installed at one end of the connecting block. A second gear is installed on the outside of one end of the cleaning roller. A second toothed plate is installed at the bottom of one side of the installation box. A moving groove is opened inside one side of the installation box. A rotating shaft is installed on one side of the bottom of the screening frame. An eccentric wheel is installed on the outside of the rotating shaft.

[0008] Preferably, a guide seat is installed on the other side of the bottom of the screening rack, the guide seat has a guide groove inside, a guide block is installed inside the guide groove, and one end of the cleaning roller is movably connected to one end of the guide block.

[0009] Preferably, a first gear is installed at one end of one side of the guide block, a fixed box is installed at one end of the first gear, a second reciprocating screw is installed inside the fixed box, a second thread sleeve is installed on the outside of the second reciprocating screw, an extrusion sleeve is installed on the outside of the cleaning roller, one end of the extrusion sleeve is connected to one side of the second thread sleeve, and a first toothed plate is installed at the bottom end of one side of the guide seat.

[0010] Preferably, the outer side of the first reciprocating lead screw is provided with an external thread, and the inner side of the first threaded sleeve is provided with an internal thread, so that the first reciprocating lead screw and the first threaded sleeve form a threaded connection.

[0011] Preferably, a guide plate is installed at the top of the fixed box, and one side of the guide plate is inserted into the interior of the moving groove, forming a guiding connection between the guide plate and the moving groove.

[0012] Preferably, the extrusion sleeve is fitted onto the outside of the cleaning roller, and the extrusion sleeve and the cleaning roller are slidably connected.

[0013] Preferably, the surface of the second toothed plate is provided with a plurality of teeth, and the second toothed plate meshes with the second gear.

[0014] The present invention provides a husk shredding device for a corn harvester, the advantages of which are: With the auxiliary structure in place, when the bracts fall onto the surface of the conveying component, the rotation between the rotating rod and the through groove pushes the moving seat to move inside the movable groove, thereby adjusting the height of the extrusion roller so that it can remove water from bracts of different stack thicknesses. Furthermore, when the bracts come into contact with the squeezing roller, the absorbent sponge on the surface of the squeezing roller first squeezes the bracts. The absorbent sponge has flexible deformation ability, and when squeezed, it can closely adhere to the surface of the bracts, and even embed itself in the folds, absorbing the water in the folds into the cotton body, thus cleaning the water droplets on the surface of the bracts. The fiber pores of the absorbent sponge, with a pore size of 0.1 to 0.5 mm, can form a physical barrier layer. Even if the impurities in the bracts are less than 1 mm in diameter, they will be intercepted on the surface of the cotton body and cannot come into contact with the water absorption holes on the surface of the squeezing roller. This is equivalent to adding a pre-filter to the water absorption holes, preventing residual impurities from clogging the water absorption holes and affecting the adsorption effect. Furthermore, the use of absorbent sponges can also serve as a buffer layer to prevent impurities from directly contacting the extrusion rollers, reducing roller surface wear, and extending the service life of the extrusion rollers. This completes the cleaning of residual water droplets on the surface of the bracts, preventing damp bracts from sticking to the toothed roller surface during subsequent crushing, filling the gaps between the teeth, forming a sticky coating that prevents the teeth from biting and shearing in the early stages, and causing the accumulated sticky bracts to get stuck between the two rollers in the later stages, causing the roller speed to drop sharply and affecting the crushing effect. With a screening and dewatering structure, when the separated bracts are transported to the top of the screening rack, the rotating shaft and eccentric wheel work together to make one end of the screening rack vibrate up and down, vibrating the bracts to screen out soil clods and impurities. During the vibration, the water droplets on the surface of the bracts are also initially shaken off, completing the initial cleaning of the water droplets on the surface of the bracts. Furthermore, since water droplets easily adhere to impurities and clog the pores of the screening screen, during screening, the cleaning roller can be moved by the cooperation of the first reciprocating screw and the first screw sleeve. When the cleaning roller moves, one end of the cleaning roller is movably connected to one end of the connecting block, and a second gear is installed on the outer side of one end of the cleaning roller. As the cleaning roller moves, the meshing between the second gear and the second toothed plate allows the cleaning roller to rotate during the movement. This rotation cleans the pores of the screening screen, making the cleaning effect better and preventing the screening screen from clogging and affecting the screening effect. Furthermore, when the cleaning roller moves to one side, it causes the guide block to slide inside the guide groove. When the guide block moves to one side, it also causes the fixed box to move to one side. Since a first gear is installed at one end of the fixed box, and one end of the first gear is movably connected to one side of the guide block, as the fixed box moves, the first gear and the first toothed plate cooperate to drive the second reciprocating screw to rotate. During the rotation of the second reciprocating screw, the extrusion sleeve will move back and forth on the surface of the cleaning roller through the cooperation with the second threaded sleeve, thereby squeezing the bristles on the surface of the cleaning roller and squeezing away the impurities and water droplets on the surface of the bristles. This prevents a large amount of impurities and water droplets from sticking to the surface of the bristles during long-term cleaning, which would affect the cleaning work of the bristles, thus completing the cleaning work of the bristles. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below; Figure 3 This is a rear-view three-dimensional structural diagram of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the pulverizer of the present invention, viewed from the front and cross-section. Figure 5 This is a frontal three-dimensional structural diagram of the auxiliary structure of the present invention; Figure 6 This is a three-dimensional structural diagram of the auxiliary structure of the present invention, viewed from below. Figure 7 This is a frontal view of the partially exploded three-dimensional structure of the extrusion roller of the present invention; Figure 8 This is a side view of the partially exploded three-dimensional structure of the extrusion roller of the present invention; Figure 9 This is a top-view three-dimensional structural diagram of the screening and dewatering structure of the present invention; Figure 10 This is a three-dimensional structural diagram of the screening and dewatering structure of the present invention, viewed from below. Figure 11This is a frontal three-dimensional structural diagram of the cleaning brush of the present invention; Figure 12 This is a side view of the three-dimensional structure of the cleaning brush of the present invention; Figure 13 This is a top-view three-dimensional structural diagram of the cleaning brush of the present invention; Figure 14 This is a three-dimensional structural diagram of the cleaning brush of the present invention, viewed from below. Figure 15 for Figure 13 A magnified schematic diagram of the structure at point A in the middle.

[0016] The following are the annotations in the diagram: 1. Crusher; 2. Fixed plate; 3. Support plate; 4. Screening and dewatering structure; 401. Screening frame; 402. Screening mesh; 403. Rotating shaft; 404. Eccentric wheel; 405. Cleaning roller; 406. Mounting box; 407. Guide seat; 408. Guide groove; 409. Guide block; 4010. First gear; 4011. Extrusion sleeve; 4012. First toothed plate; 4013. Fixed box; 4014. Second toothed plate; 4015. Moving groove; 4016. Guide plate; 4017. First... 4018. Reciprocating lead screw; 4019. First lead sleeve; 4020. Second lead sleeve; 4021. Second reciprocating lead screw; 4022. Second gear; 4023. Connecting block; 5. Auxiliary structure; 501. Baffle; 502. Connecting pipe; 503. Conveying assembly; 504. Moving seat; 505. Through groove; 506. Rotating rod; 507. Water-absorbing sponge; 508. Movable groove; 509. Fan; 5010. Collection box; 5011. Squeezing roller; 5012. Water suction hole; 5013. Collection box; 6. Crushing roller; 7. Differential assembly. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0018] Please see Figures 1-15 The present invention provides a husk crushing device for a corn harvester, comprising a crusher 1, a fixed plate 2 and a support plate 3; The crusher 1 is equipped with a crushing roller 6 inside, a differential speed assembly 7 is installed on one side of the crusher 1, a fixed plate 2 is installed at one end of the crusher 1, a support plate 3 is installed at the top of the fixed plate 2, and an auxiliary structure 5 is provided at the top of the support plate 3.

[0019] See Figures 1-3 and Figures 9-15The top side of the support plate 3 is provided with a screening and dewatering structure 4. The screening and dewatering structure 4 includes a screening frame 401. The screening frame 401 is installed on one side of the top of the support plate 3. A screening screen 402 is installed inside the screening frame 401. An installation box 406 is installed on one side of the bottom end of the screening frame 401. A first reciprocating screw 4017 is installed inside the installation box 406. A first thread sleeve 4018 is installed on the outside of the first reciprocating screw 4017. A connecting block 4022 is installed on one side of the first thread sleeve 4018. A cleaning roller 405 is movably installed on one end of the connecting block 4022. A second gear 4021 is installed on the outside of one end of the cleaning roller 405. A second toothed plate 4014 is installed at the bottom end of one side of the installation box 406. A moving groove 4015 is opened inside one side of the installation box 406. A rotating shaft 403 is installed on one side of the bottom end of the screening frame 401. An eccentric wheel 404 is installed on the outside of the rotating shaft 403. A guide seat 407 is installed on the other side of the bottom of the screening rack 401. A guide groove 408 is opened inside the guide seat 407. A guide block 409 is installed inside the guide groove 408. One end of the cleaning roller 405 is movably connected to one end of the guide block 409. A first gear 4010 is installed at one end of one side of the guide block 409. A fixed box 4013 is installed at one end of the first gear 4010. A second reciprocating screw 4020 is installed inside the fixed box 4013. A second thread sleeve 4019 is installed on the outside of the second reciprocating screw 4020. A pressing sleeve 4011 is installed on the outside of the cleaning roller 405. One end of the pressing sleeve 4011 is connected to one side of the second thread sleeve 4019. A first toothed plate 4012 is installed at the bottom end of one side of the guide seat 407. The first reciprocating lead screw 4017 has an external thread on its outer side and the first thread sleeve 4018 has an internal thread on its inner side, forming a threaded connection between the first reciprocating lead screw 4017 and the first thread sleeve 4018. A guide plate 4016 is installed on the top of the fixed box 4013. One side of the guide plate 4016 is inserted into the interior of the moving groove 4015, and a guide connection is formed between the guide plate 4016 and the moving groove 4015. The extrusion sleeve 4011 is sleeved on the outside of the cleaning roller 405, and the extrusion sleeve 4011 and the cleaning roller 405 are slidably connected. The surface of the second toothed plate 4014 is provided with a number of teeth, and the second toothed plate 4014 meshes with the second gear 4021.

[0020] Specifically, in this embodiment, when the corn harvester harvests corn, it conveys the separated husks to the top of the screening rack 401. At this time, the motor is started, driving the rotating shaft 403 to rotate. During rotation, the rotating shaft 403 drives the eccentric wheel 404 to rotate, causing one end of the screening rack 401 to vibrate up and down, thus vibrating the husks. When the husks are vibrated, they vibrate up and down, allowing soil clods and impurities to be screened out through the screening mesh 402. During the vibration, water droplets on the surface of the husks are also shaken off, completing the initial distribution of water droplets. The screened impurities and water droplets fall into the collection box at the bottom. Because water droplets are easily... The impurities adhere to and block the pores of the screening screen 402. Therefore, when the screening rack 401 screens, the motor is started to drive the first reciprocating screw 4017 to rotate. During the rotation of the first reciprocating screw 4017, it will drive the connecting block 4022 to move through the cooperation with the first thread sleeve 4018. During the movement of the connecting block 4022, it will drive the cleaning roller 405 to move. When the cleaning roller 405 moves, since one end of the cleaning roller 405 is movably connected to one end of the connecting block 4022 and a second gear 4021 is installed on the outer side of one end of the cleaning roller 405, as the cleaning roller 405 moves, through the meshing between the second gear 4021 and the second toothed plate 4014, it can... The cleaning roller 405 rotates during its movement, cleaning the pores of the screening screen 402 to prevent clogging and maintain screening efficiency. As the cleaning roller 405 moves to one side, it causes the guide block 409 to slide within the guide groove 408. This movement of the guide groove 408, in turn, causes the fixed box 4013 to move to one side as well. Since a first gear 4010 is mounted at one end of the fixed box 4013, and one end of the first gear 4010 is movably connected to one side of the guide block 409, the movement of the fixed box 4013, through the engagement between the first gear 4010 and the first toothed plate 4012, drives... The second reciprocating screw 4020 rotates, and during its rotation, it cooperates with the second screw sleeve 4019 to drive the extrusion sleeve 4011 to reciprocate on the surface of the cleaning roller 405, thus squeezing the bristles on the surface of the cleaning roller 405 and removing impurities and water droplets from the bristle surface. This prevents a large amount of impurities and water droplets from sticking to the bristle surface during long-term cleaning, which would affect the cleaning work. This completes the cleaning of the bristles. When the fixed box 4013 moves, the guide plate 4016 slides inside the moving groove 4015 to guide the fixed box 4013, making the fixed box 4013 more stable during movement.

[0021] See Figures 1-8The auxiliary structure 5 includes a conveying assembly 503, which is installed on the top of the support plate 3. Baffles 501 are installed on both sides of the top of the conveying assembly 503. Movable grooves 508 are opened inside the baffles 501. Movable seats 504 are installed inside the movable grooves 508. A squeezing roller 5011 is installed at the middle position of the movable seat 504. Water absorption holes 5012 are opened on the surface of the squeezing roller 5011. A water-absorbing sponge 507 is installed on the outside of the squeezing roller 5011. A connecting pipe 502 is rotatably sealed at one end of the squeezing roller 5011. A collection box 5010 is installed at one end of the connecting pipe 502. A collection box 5013 is installed inside the collection box 5010. A suction fan 509 is installed on one side of the collection box 5010. The baffle 501 has a through groove 505 inside, and a rotating rod 506 is installed inside the through groove 505. The bottom end of the rotating rod 506 is connected to the top end of the movable seat 504, and the through groove 505 and the rotating rod 506 form a threaded connection. Multiple sets of water suction holes 5012 are provided, and the multiple sets of water suction holes 5012 are distributed in a ring on the outside of the extrusion roller 5011.

[0022] Specifically, in this embodiment, the bracts after initial dehydration fall onto the surface of the conveying assembly 503. At this point, the height of the squeezing roller 5011 is adjusted according to the squeezing requirements. During height adjustment, the rotating rod 506 is rotated. As the rotating rod 506 rotates with the through groove 505, the moving seat 504 moves within the movable groove 508, thus adjusting the height of the squeezing roller 5011. After height adjustment is complete, an external power source starts the squeezing roller 5011 to rotate. When the bracts contact the squeezing roller 5011, the absorbent sponge 507 on the surface of the squeezing roller 5011 first squeezes out the water. The absorbent sponge 507, with its flexible deformation capability, can tightly conform to the surface of the bracts during compression, even embedding itself into the folds. It absorbs moisture from within the folds into the sponge body, completing a secondary cleaning of water droplets on the bract surface. The fiber pores of the absorbent sponge 507, typically 0.1–0.5 mm in diameter, form a physical barrier layer. Even impurities smaller than 1 mm in diameter from the bracts are intercepted on the surface of the sponge body, preventing them from contacting the absorbent holes 5012 on the surface of the compression roller 5011. This is equivalent to adding a pre-filter to the absorbent holes 5012, preventing residual impurities from clogging the absorbent. The water hole 5012 affects the adsorption effect, and the use of the absorbent sponge 507 can act as a buffer layer to prevent impurities from directly contacting the extrusion roller 5011, reducing roller surface wear and improving the service life of the extrusion roller 5011. When the absorbent sponge 507 is adsorbing water droplets, the suction fan 509 is activated. After the suction fan 509 is activated, it generates suction force, which sucks away the water droplets adsorbed inside the absorbent sponge 507 through the water suction hole 5012. Since the connecting pipe 502 is rotatably sealed to one end of the extrusion roller 5011, the rotation of the extrusion roller 5011 will not affect the connection. When the 502 receiver is in normal use, the water droplets sucked up will fall into the collection box 5013 inside the collection box 5010 to complete the collection of water droplets, thereby cleaning the water droplets remaining on the surface of the husks and preventing the damp husks from sticking to the surface of the toothed rollers, filling the gaps between the teeth and forming a sticky coating. Initially, this would prevent the teeth from biting and cutting, and later, the accumulated sticky husks would get stuck between the two rollers, causing the roller speed to drop sharply and affecting the crushing effect. The dehydrated husks will fall into the inside of the crusher 1 and be crushed by the rotating crushing roller 6, thus completing the crushing of husks during corn harvesting.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A husk crushing device for a corn harvester, characterized in that: It includes a crusher (1), a fixed plate (2), and a support plate (3); The crusher (1) is equipped with a crushing roller (6) inside, a differential assembly (7) is installed on one side of the crusher (1), a fixed plate (2) is installed at one end of the crusher (1), a support plate (3) is installed at the top of the fixed plate (2), and an auxiliary structure (5) is provided at the top of the support plate (3). The auxiliary structure (5) includes a conveying assembly (503), which is installed on the top of the support plate (3). Baffles (501) are installed on both sides of the top of the conveying assembly (503). A movable groove (508) is opened inside the baffle (501). A movable seat (504) is installed inside the movable groove (508). A squeezing roller (5011) is installed at the middle position of the movable seat (504). A water suction hole (5012) is opened on the surface of the squeezing roller (5011). A water-absorbing sponge (507) is installed on the outside of the squeezing roller (5011). A connecting pipe (502) is rotatably sealed at one end of the squeezing roller (5011). A collection box (5010) is installed at one end of the connecting pipe (502). A collection box (5013) is installed inside the collection box (5010). A suction fan (509) is installed on one side of the collection box (5010).

2. The husk crushing device for a corn harvester according to claim 1, characterized in that: The baffle (501) has a through groove (505) inside, and a rotating rod (506) is installed inside the through groove (505). The bottom end of the rotating rod (506) is connected to the top end of the movable seat (504), and the through groove (505) and the rotating rod (506) form a threaded connection.

3. The husk crushing device for a corn harvester according to claim 1, characterized in that: The water suction holes (5012) are provided in multiple sets, and the multiple sets of water suction holes (5012) are distributed in a ring on the outside of the extrusion roller (5011).

4. The husk crushing device for a corn harvester according to claim 1, characterized in that: The top side of the support plate (3) is provided with a screening and dewatering structure (4). The screening and dewatering structure (4) includes a screening frame (401). The screening frame (401) is installed on one side of the top of the support plate (3). A screening mesh (402) is installed inside the screening frame (401). An installation box (406) is installed on one side of the bottom end of the screening frame (401). A first reciprocating screw (4017) is installed inside the installation box (406). A first screw sleeve (4018) is installed on the outside of the first reciprocating screw (4017). A connecting block (4022) is installed on one side of the sleeve (4018), and a cleaning roller (405) is movably installed on one end of the connecting block (4022). A second gear (4021) is installed on the outer side of one end of the cleaning roller (405). A second toothed plate (4014) is installed at the bottom of one side of the mounting box (406). A moving groove (4015) is opened inside one side of the mounting box (406). A rotating shaft (403) is installed on one side of the bottom of the screening rack (401), and an eccentric wheel (404) is installed on the outer side of the rotating shaft (403).

5. A husk crushing device for a corn harvester according to claim 4, characterized in that: A guide seat (407) is installed on the other side of the bottom of the screening rack (401). A guide groove (408) is provided inside the guide seat (407). A guide block (409) is installed inside the guide groove (408). One end of the cleaning roller (405) is movably connected to one end of the guide block (409).

6. A husk crushing device for a corn harvester according to claim 5, characterized in that: A first gear (4010) is installed at one end of one side of the guide block (409), a fixed box (4013) is installed at one end of the first gear (4010), a second reciprocating screw (4020) is installed inside the fixed box (4013), a second thread sleeve (4019) is installed on the outside of the second reciprocating screw (4020), an extrusion sleeve (4011) is installed on the outside of the cleaning roller (405), one end of the extrusion sleeve (4011) is connected to one side of the second thread sleeve (4019), and a first toothed plate (4012) is installed at the bottom end of one side of the guide seat (407).

7. A husk crushing device for a corn harvester according to claim 4, characterized in that: The first reciprocating lead screw (4017) has an external thread on its outer side, and the first threaded sleeve (4018) has an internal thread on its inner side. The first reciprocating lead screw (4017) and the first threaded sleeve (4018) form a threaded connection.

8. A husk crushing device for a corn harvester according to claim 6, characterized in that: A guide plate (4016) is installed on the top of the fixed box (4013). One side of the guide plate (4016) is inserted into the interior of the moving groove (4015). The guide plate (4016) and the moving groove (4015) form a guiding connection.

9. A husk crushing device for a corn harvester according to claim 6, characterized in that: The extrusion sleeve (4011) is sleeved on the outside of the cleaning roller (405), and the extrusion sleeve (4011) and the cleaning roller (405) are slidably connected.

10. A husk crushing device for a corn harvester according to claim 6, characterized in that: The surface of the second toothed plate (4014) is provided with a plurality of teeth, and the second toothed plate (4014) meshes with the second gear (4021).

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