Low-loss corn threshing structure applied to corn kernel harvester

Abstract

The invention relates to the technical field of agricultural equipment, in particular to a low-loss corn threshing structure applied to a corn kernel harvester, which comprises a machine frame, a dynamic stripping mechanism is arranged at the top end of the inner wall of the front end of the machine frame through a base plate movable part, and three groups of connected circular tube-shaped concave plates are rotationally arranged at the middle section in the machine frame; a pneumatic fan is arranged at the position, flush with the circular-tube-shaped concave plate, of the inner wall of one side of the machine frame, two sets of feeding acceleration rollers arranged in an oblique angle mode are arranged in the machine frame and located between the base plate and the circular-tube-shaped concave plate, shaft rods at one ends of the feeding acceleration rollers are slidably connected with the inner side wall of the machine frame, and shaft rods at the other ends of the feeding acceleration rollers are jointly provided with a dynamic driving mechanism. By means of the innovative design of flexible self-adaptive segmented threshing, synchronous distance-adjustable feeding, active impurity removal and blockage prevention and secondary seed removal, the defects of traditional equipment in adaptability and threshing quality are effectively overcome, and the grain breakage rate and the non-threshing rate are reduced to the maximum extent while efficient threshing is finally achieved.

Description

Technical Field

[0001] This invention relates to the field of agricultural equipment technology, specifically to a low-loss corn threshing structure applied to a corn kernel harvester. Background Technology

[0002] Low-loss corn threshing structures applied to corn kernel harvesters are a key element in ensuring the quality of mechanized corn harvesting and reducing post-harvest losses. Taking large-scale corn cultivation as an example, in vast plains or hilly areas, harvesters need to efficiently thresh corn with varying ear sizes and maturity levels. The threshing device must be able to quickly and cleanly separate the kernels from the cob while minimizing kernel breakage and damage, directly impacting grain grade, storage quality, and economic benefits.

[0003] However, the stress state and movement trajectory of corn ears during actual threshing are extremely complex. Not only are there significant differences in diameter and curvature among individual ears, but the strength of the cob and the adhesion of the kernels also vary depending on the variety and moisture content. Traditional threshing equipment is limited in its adaptive design and load control, and generally suffers from problems such as fixed tooth gap and non-adjustable feed roller distance. It is difficult to replicate the flexible pressure control and adaptive adjustment required to deal with irregularly shaped ears in actual harvesting. This easily leads to the contradiction of "excessive squeezing" and "incomplete threshing" during the threshing process, resulting in increased kernel breakage rate or increased entrainment loss.

[0004] To address the aforementioned technical bottlenecks and aim at achieving precise threshing with "low damage and high threshing rate," an improved method combining flexible adaptive threshing and synchronous adjustable distance feeding is proposed. This method adapts to the diverse physical morphology and threshing mechanics requirements of corn ears, avoiding hidden damage to kernels and harvest losses caused by structural rigidity, unstable clamping, or uneven load.

[0005] To address this technical deficiency, a solution is proposed. Summary of the Invention

[0006] The purpose of this invention is to effectively solve the defects of traditional equipment in terms of adaptability and threshing quality through innovative designs such as flexible and adaptive segmented threshing, synchronous adjustable distance feeding, active impurity removal and anti-clogging, and secondary deseeding. Ultimately, it achieves efficient threshing while minimizing the grain breakage rate and the rate of incomplete threshing.

[0007] The objective of this invention can be achieved through the following technical solution: a low-loss corn threshing structure applied to a corn kernel harvester, comprising a frame, a dynamic threshing mechanism provided at the top of the inner wall of the front end of the frame via a movable part of the base plate, and three sets of connected cylindrical concave plates rotatably arranged in the middle section inside the frame, a pneumatic fan provided on one side of the inner wall of the frame and flush with the cylindrical concave plates, and two sets of feeding acceleration rollers arranged at an oblique angle inside the frame between the base plate and the cylindrical concave plates, one end of the feeding acceleration roller shaft being slidably connected to the inner side wall of the frame, and the other end of both shafts being fitted with a dynamic drive mechanism.

[0008] Furthermore, the dynamic unloading mechanism includes a concave slide frame, and two double-toothed rotating cylinders are connected to the inside of the concave slide frame by shafts on both sides. A drive motor is provided at the end of one set of shafts, and the two sets of double-toothed rotating cylinders mesh with each other. A ring-shaped set of teeth is provided at the front end of the cylinder opening of the two sets of double-toothed rotating cylinders, and a turntable is fixedly installed at the end of the two sets of double-toothed rotating cylinders away from the shafts.

[0009] Furthermore, the turntable has several sets of spike teeth arranged at equal intervals from the center outward on the side away from the double-toothed rotating cylinder, and the length of one set of spike teeth on the outside of the turntable is greater than the length of the spike teeth on the other set of the turntable.

[0010] Furthermore, limit rods are respectively installed at the four corners of the front end of the concave sliding frame, and the front end of the limit rods is fixedly connected to the inner wall of the machine frame. A spring coil is wound around the outside of the limit rods, and an airbag sleeve is provided between the concave sliding frame and the inner wall of the machine frame.

[0011] Furthermore, one of the sets of double-toothed rotary drums has a transversely arranged transmission toothed roller meshing at the annular teeth at the front end, and the transmission toothed roller is set inside the concave slide frame through the machine base. One end of the transmission toothed roller is fixedly connected to a spiral guide rod, and a concave push frame is spirally sleeved on the outside of the spiral guide rod. The rear end of the concave push frame is sleeved on the outside of one of the sets of feeding acceleration rollers.

[0012] Furthermore, the dynamic drive mechanism includes an inclined positioning frame fixedly installed on the side wall of the machine frame, and one end of the feeding acceleration roller slides through one side edge of the positioning frame. A bevel gear is fixedly installed on the shaft of the feeding acceleration roller extending into the positioning frame. A second drive motor is provided at the center of the inner wall of the front end of the positioning frame, and two sets of reversing gear sleeves with conical structures are fixedly installed on the output shaft of the second drive motor.

[0013] Furthermore, the two sets of reversing gear sleeves are respectively meshed at the adjacent positions of the two sets of bevel gears, and a spring coil is provided on the outside of the shaft and between the two sets of reversing gear sleeves. One set of reversing gear sleeves is slidably sleeved on the outside of the shaft, and the slider provided on the inner ring surface of the reversing gear sleeve is slidably engaged with the transverse groove provided on the outside of the rotating rod. A rectangular push frame is slidably sleeved on the outside of the shaft and adjacent to the sliding reversing gear sleeve. A cylinder is provided between the end of the rectangular push frame and the inner wall of the front end of the positioning frame.

[0014] Furthermore, a friction plate is hinged to the top of the substrate away from the transmission toothed roller, and one set of the friction plates is fed into the top surface of the acceleration roller, and several sets of triangular friction strips are provided on the bottom surface of the friction plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention sets up a dynamic threshing mechanism, which is a floating support system composed of a concave sliding frame, a limiting rod, a spring coil, and an air bladder sleeve. This mechanism forces the turntable with spiked teeth to adaptively adjust its position according to the size of the corn ears, ensuring that the spiked teeth always maintain the best contact pressure with the surface of corn ears of different sizes, thus achieving flexible threshing. Secondly, the teeth on the turntable are set with different lengths. The corn ears first pass through the area with short teeth and then enter the area with long teeth. This facilitates a segmented and refined operation process of first peeling off the husks and then removing the kernels. It avoids kernel puncture damage that may be caused by the long teeth intervening too early, and further ensures the quality of threshing and low loss.

[0016] This invention employs a dynamic drive mechanism. A single drive motor (Motor 2) simultaneously drives two feeding acceleration rollers via a reversing gear sleeve. A cylinder, rectangular push frame, and spring coil (Motor 2) enable real-time, synchronized adjustment of the center distance between the two rollers. Motor 2 ensures absolutely consistent rotational speeds for both rollers, preventing corn ear feeding deviation, uneven rolling, or crushing wear caused by speed differences, thus reducing kernel loss. The adjustable center distance allows the equipment to adaptively clamp corn ears of different diameters, solving the problems of unstable clamping (leading to incomplete threshing) or excessive compression (leading to premature kernel breakage) of fixed-spaced feeding rollers on irregularly shaped ears, improving adaptability and threshing efficiency. The present invention also includes a friction plate with triangular friction strips at the end of the threshing process, which performs secondary friction cleaning on the corn ears after the main threshing process, effectively removing residual kernels on the surface, significantly reducing grain loss and improving the threshing rate. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top sectional view of the frame of the present invention; Figure 3 This is a reverse top sectional view of the frame of the present invention; Figure 4 This is a schematic diagram showing the combination of a partial structure of the machine frame and the dynamic threshing structure of the present invention; Figure 5 This is a top sectional view of the frame of the present invention; Figure 6 This is a schematic diagram showing the combination of a partial structure of the feeding acceleration roller and the dynamic drive mechanism of the present invention; Figure 7 This is a schematic diagram of the operating structure of the friction plate and dynamic drive mechanism of the present invention.

[0019] In the diagram: 1. Machine frame; 2. Base plate; 3. Dynamic unloading mechanism; 31. Concave sliding frame; 32. Drive motor one; 33. Double-tooth rotary drum; 34. Turntable; 35. Limiting rod; 36. Spring coil one; 37. Airbag sleeve; 38. Transmission toothed roller; 39. Spiral guide rod; 310. Concave push frame; 4. Circular tubular concave plate; 5. Feeding acceleration roller; 6. Dynamic drive mechanism; 61. Positioning frame; 62. Bevel gear; 63. Drive motor two; 64. Reversing gear sleeve; 65. Spring coil two; 66. Rectangular push frame; 67. Cylinder; 7. Friction abutment plate; 71. Triangular friction strip. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0021] Example 1: Please refer to Figure 1 - Figure 5As shown, a low-loss corn threshing structure applied to a corn kernel harvester includes a frame 1. A dynamic threshing mechanism 3 is set at the top of the inner wall of the front end of the frame 1 through the movable part of the base plate 2 to achieve flexible adaptive threshing of corn ears. Three sets of connected cylindrical concave plates 4 are rotatably set in the middle section inside the frame 1. A pneumatic fan is set on one side of the inner wall of the frame 1, flush with the cylindrical concave plates 4, which can directionally blow away the straw impurities during the threshing process and reduce the frictional loss of impurities on the kernels. Two sets of feeding acceleration rollers 5 are set inside the frame 1 between the base plate 2 and the cylindrical concave plates 4. The oblique arrangement adapts to the multi-directional limitation of the corn ears and realizes dual auxiliary rotation, which is conducive to the full removal of kernels from the corn ears. One end of the feeding acceleration roller 5 is slidably connected to the inner side wall of the frame 1, and the other end of the two ends are jointly equipped with a dynamic drive mechanism 6. The dynamic unloading mechanism 3 includes a concave slide frame 31. The two sides of the concave slide frame 31 are connected to double-toothed rotating cylinders 33 by shafts. One set of shafts is equipped with a drive motor 32. The two sets of double-toothed rotating cylinders 33 mesh with each other. The front end of the two sets of double-toothed rotating cylinders 33 is provided with a ring-shaped set of teeth. A turntable 34 is fixedly installed at the end of the two sets of double-toothed rotating cylinders 33 away from the shafts. Several sets of nail teeth are arranged at equal intervals from the center to the outside on the side of the turntable 34 away from the double-toothed rotating cylinders 33. The length of the nail teeth on the outside of one set of turntables 34 is greater than the length of the nail teeth on the other set of turntables 34. In the specific operation process: First, multiple sets of corn cobs are introduced into the frame through the feed inlet of the frame 1. The corn cobs are introduced between two adjacent sets of feeding acceleration rollers 5. The feeding acceleration rollers 5 achieve dynamic self-rotation with the help of the dynamic drive mechanism 6, thereby assisting the corn cob threshing process. At the same time, the drive motor 32 is started, which drives one set of double-tooth rotating drums 33 to rotate. Since the two sets of double-tooth rotating drums 33 mesh with each other, the other set of double-tooth rotating drums 33 also rotates synchronously in the opposite direction, thereby driving the turntable 34 to rotate and driving the long nail teeth and short nail teeth to start working. The corn first passes through the short-toothed area, where the conical ends of the short teeth remove the leaves from the surface of the corn cob. As the corn cob moves, when it reaches the long-toothed area, the long teeth thresh the kernels on the cob surface, avoiding excessive puncture that could damage the kernels. The removed leaves and kernels are received by the cylindrical concave plates 4 in the first and second sections, respectively. The mesh surface of the cylindrical concave plates 4 screens the kernels, and with the help of a pneumatic fan, broken straw and other impurities can be blown away in a directional manner during the threshing process, thereby reducing frictional damage to the kernels caused by impurities.

[0022] It is worth noting that the corn ears vary in size. During the threshing process, the position of the turntable 34 needs to be adjusted accordingly to ensure that the spikes on its surface are always in contact with the surface of the corn ear. Therefore, limit rods 35 are respectively installed at the four corners of the front end of the concave slide frame 31, and the front end of the limit rods 35 is fixedly connected to the inner wall of the machine frame 1. A spring coil 36 is wrapped around the outside of the limit rods 35, and an airbag sleeve 37 is provided between the concave slide frame 31 and the inner wall of the machine frame 1. When encountering corn ears of different sizes, the airbag sleeve 37 is filled with gas and presses against the concave slide frame 31 and its internal components to move. The spring coil 36 pulls and stretches until the nail teeth on the surface of the turntable 34 contact the surface of the corn ear. Under the reaction force of the corn ear, the concave slide frame 31 will move along the limit rod 35. The spring coil 36 and the airbag sleeve 37 play a role in buffering and resetting, forcing the dynamic threshing mechanism 3 to flexibly adapt to corn ears of different sizes, ensuring the threshing effect while further reducing the kernel breakage rate.

[0023] Example 2: Please refer to Figure 3 - Figure 5 As shown, a set of double-toothed rotary drums 33 has a transversely arranged transmission toothed roller 38 meshing with the annular teeth at the front end. The transmission toothed roller 38 is set inside the concave slide frame 31 through the machine base. One end of the transmission toothed roller 38 is fixedly connected to a spiral guide rod 39, and a concave push frame 310 is spirally sleeved on the outside of the spiral guide rod 39. The rear end of the concave push frame 310 is sleeved on the outside of one set of feeding acceleration rollers 5. The double-toothed drum 33 rotates to drive the transmission toothed roller 38 and the spiral guide rod 39 to rotate synchronously. Since the spiral guide rod 39 and the concave push frame 310 have a spiral transmission relationship, the bottom of the concave push frame 310 is forced to move back and forth along the axial direction of the feeding acceleration roller 5, which helps to promote the phased movement of corn ears and solves the problem of material accumulation caused by the disconnect between the threshing and feeding rates in traditional threshers.

[0024] Example 3: Please refer to Figures 5-7 As shown, the dynamic drive mechanism 6 includes an inclined positioning frame 61 fixedly installed on the side wall of the frame 1, and one end of the feeding acceleration roller 5 slides through one side edge of the positioning frame 61. A bevel gear 62 is fixedly installed on the shaft of the feeding acceleration roller 5 extending into the positioning frame 61. A second drive motor 63 is provided at the center of the inner wall of the front end of the positioning frame 61, and two sets of conical reversing gear sleeves 64 are sleeved on the outside of the rotating rod fixedly installed at the output shaft of the second drive motor 63. Compared with the traditional independent drive structure, the second drive motor 63 synchronously drives the two sets of reversing gear sleeves 64 to rotate, which simplifies the transmission link and ensures the consistency of the rotation speed of the two sets of feeding acceleration rollers 5, avoiding feeding deviation and grain loss caused by the difference in rotation speed. Two sets of reversing gear sleeves 64 are respectively meshed with two sets of bevel gears 62 at adjacent positions. A spring coil 65 is provided on the outside of the shaft and between the two sets of reversing gear sleeves 64. One set of reversing gear sleeves 64 is slidably sleeved on the outside of the shaft. The slider provided on the inner ring surface of the reversing gear sleeve 64 is slidably engaged with the transverse groove provided on the outside of the rotating rod. A rectangular push frame 66 is slidably sleeved on the outside of the shaft and adjacent to the sliding reversing gear sleeve 64. A cylinder 67 is provided between the end of the rectangular push frame 66 and the inner wall of the front end of the positioning frame 61. The cylinder 67 drives the rectangular push frame 66 to push the sliding reversing gear sleeve 64 to slide along the transverse groove of the rotating rod. With the elastic reset of the spring coil 65, the meshing position of the two sets of reversing gear sleeves 64 and the bevel gears 62 can be adjusted in real time, thereby changing the center distance of the two sets of feeding acceleration rollers 5 to adapt to the feeding needs of corn ears of different diameters and solve the problem of unstable clamping or excessive squeezing of irregular ears by traditional fixed-gap feeding rollers. In specific work: Threshing stage: Start drive motor 63, the rotating rod drives two sets of reversing gear sleeves 64 to rotate synchronously, and because the reversing gear sleeves 64 mesh with the bevel gear 62, the bevel gear 62 and the feeding acceleration roller 5 rotate simultaneously, which in turn helps the corn cobs in the threshing stage to rotate, so as to thresh the corn completely. When threshing is complete or when the spacing of the feeding acceleration rollers 5 needs adjustment due to corn size issues: cylinder 67 pushes the rectangular push frame 66 to move axially. The rectangular push frame 66 squeezes the sliding reversing gear sleeve 64 to slide along the transverse groove of the rotating rod. At this time, the second spring coil 65 is compressed, and the meshing position of the sliding reversing gear sleeve 64 and the bevel gear 62 changes, thereby adjusting the center distance between the two sets of feeding acceleration rollers 5. The second spring coil 65 maintains the stable meshing of the reversing gear sleeve 64 and the bevel gear 62 through elastic restoring force, ensuring stable transmission. Qualitatively, the adjusted feeding acceleration roller 5 transports the corn ears to the bottom of the dynamic threshing mechanism 3; when the processing is completed or reverse adjustment is required, the cylinder 67 runs in reverse, and the sliding reversing gear sleeve 64 returns to the initial position under the reset force of the spring coil 65. The center distance between the two sets of feeding acceleration rollers 5 is restored to the original state, or the opening and closing distance is increased, so that the corn cobs after threshing are automatically discharged into the two sections of the circular tube concave plate 4 below the two sets of feeding acceleration rollers 5, preparing for the feeding of the next set of corn ears. The dynamic drive mechanism 6, through the combined design of drive motor 63, reversing gear sleeve 64 and cylinder 67 for auxiliary adjustment, realizes the speed synchronization, spacing adjustment and operation stability of the feeding acceleration roller 5. It effectively solves the problems of unstable clamping of irregular ears of grain and high grain breakage rate caused by the fixed spacing of the feeding roller in traditional threshers. At the same time, it simplifies the transmission structure and reduces the equipment failure rate.

[0025] In addition, a friction plate 7 is hinged to the top of the base plate 2 away from the transmission toothed roller 38, and one set of the friction plate 7 is fed into the top surface of the acceleration roller 5. Several sets of triangular friction strips 71 are provided on the bottom surface of the friction plate 7. After the threshing ears are driven to the lower end of the inclined friction plate 7, the triangular friction strips 71 make frictional contact with the rolling corn ears to perform secondary de-kerneling, so as to completely remove the remaining kernels on the surface of the corn ears. The triangular friction strips 71 are made of highly wear-resistant materials, which not only ensures effective friction with the corn ears but also extends their service life. Their unique triangular shape design increases the contact area with the corn ears, making the secondary de-kerneling process more efficient and thorough.

[0026] Working principle: When using this invention, the corn ears to be threshed are first smoothly introduced through the feed inlet of the frame 1. The corn ears then fall between two adjacent sets of feeding acceleration rollers 6. The feeding acceleration rollers 5 start to rotate under the drive of the dynamic drive mechanism 6. With the help of their surface friction and the multi-directional limiting effect generated by the oblique arrangement, the corn ears are driven to rotate synchronously and be conveyed forward. The corn ears first enter the working area of ​​the dynamic threshing mechanism 3. The drive motor 32 drives the double-tooth rotating drum 33 to rotate. Through tooth meshing transmission, the two sets of double-tooth rotating drums 33 rotate in opposite directions, which in turn drives the turntable 34 and the long and short spike teeth on its surface to make a circular motion. When the corn ears pass through the short spike tooth area, the conical ends of the short spike teeth first peel off the leaves and husks on the surface of the ears. As the conveying process progresses, the long spike teeth accurately thresh the kernels remaining on the surface of the cob. The difference in spike tooth length achieves graded threshing, avoiding excessive piercing by the long spike teeth that would cause kernel damage. The kernels and debris generated during the threshing process fall to the cylindrical concave plate 4. Its mesh structure allows kernels to pass through while blocking large impurities. At the same time, the directional airflow generated by the pneumatic fan blows the light straw away from the kernel pile, reducing the burden of subsequent screening. When processing corn ears of different diameters, the air bladder sleeve 37 automatically inflates and deflates according to the size of the ear, pushing the concave sliding frame 31 to move along the limiting rod 35. The spring coil 36 provides elastic buffering to ensure that the nail teeth on the surface of the turntable 34 always maintain the best contact pressure with the surface of the ear, thus achieving flexible threshing. After the initial threshing, the ears of grain continue to be conveyed to the area below the friction plate 7. The triangular friction strip 71 generates friction with the surface of the rotating ears of grain, further stripping away any remaining kernels. Finally, the completely threshed ears of grain are discharged from the end of the equipment, completing the entire low-loss threshing process.

[0027] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-loss corn threshing structure applied to a corn kernel harvester, characterized in that: The machine includes a frame (1), a dynamic unloading mechanism (3) is provided at the top of the inner wall of the front end of the frame (1) through the movable part of the base plate (2), and three sets of connected cylindrical concave plates (4) are rotatably provided in the middle section inside the frame (1). A pneumatic fan is provided on one side of the inner wall of the frame (1) and flush with the cylindrical concave plate (4). Two sets of feeding acceleration rollers (5) arranged at an angle are provided inside the frame (1) between the base plate (2) and the cylindrical concave plate (4). One end of the feeding acceleration roller (5) is slidably connected to the inner side wall of the frame (1), and the other end of both is equipped with a dynamic drive mechanism (6).

2. The low-loss corn threshing structure applied to a corn kernel harvester according to claim 1, characterized in that, The dynamic unloading mechanism (3) includes a concave slide frame (31). The two sides of the concave slide frame (31) are connected by a shaft to a double-toothed rotating cylinder (33). A drive motor (32) is provided at the end of one set of shafts. The two sets of double-toothed rotating cylinders (33) mesh with each other. A ring-shaped set of teeth is provided at the front end of the cylinder opening of the two sets of double-toothed rotating cylinders (33). A turntable (34) is fixedly installed at the end of the two sets of double-toothed rotating cylinders (33) away from the shaft.

3. The low-loss corn threshing structure for a corn kernel harvester according to claim 2, characterized in that, The turntable (34) has several sets of nail teeth arranged at equal distances from the center outward on the side away from the double-toothed rotating cylinder (33), and the length of the nail teeth on the outside of one set of the turntable (34) is greater than the length of the nail teeth on the other set of the turntable (34).

4. The low-loss corn threshing structure applied to a corn kernel harvester according to claim 2, characterized in that, Limiting rods (35) are respectively installed at the four corners of the front end of the concave sliding frame (31), and the front end of the limiting rods (35) is fixedly connected to the inner wall of the frame (1). A spring coil (36) is wound around the outside of the limiting rods (35), and an airbag sleeve (37) is provided between the concave sliding frame (31) and the inner wall of the frame (1).

5. The low-loss corn threshing structure applied to a corn kernel harvester according to claim 2, characterized in that, One of the sets of double-toothed rotary drums (33) has a transversely arranged transmission toothed roller (38) meshing at the annular teeth at the front end. The transmission toothed roller (38) is set inside the concave slide frame (31) through the machine base. One end of the transmission toothed roller (38) is fixedly connected to a spiral guide rod (39), and a concave push frame (310) is spirally sleeved on the outside of the spiral guide rod (39). The rear end of the concave push frame (310) is sleeved on the outside of one of the sets of feeding acceleration rollers (5).

6. The low-loss corn threshing structure for a corn kernel harvester according to claim 1, characterized in that, The dynamic drive mechanism (6) includes an inclined positioning frame (61) fixedly installed on the side wall of the frame (1), and one end of the feeding acceleration roller (5) slides through one side edge of the positioning frame (61). A bevel gear (62) is fixedly installed on the shaft of the feeding acceleration roller (5) extending into the positioning frame (61). A second drive motor (63) is provided at the center of the inner wall of the front end of the positioning frame (61), and two sets of reversing gear sleeves (64) with conical structures are fixedly installed on the output shaft of the second drive motor (63).

7. The low-loss corn threshing structure for a corn kernel harvester according to claim 6, characterized in that, Two sets of reversing gear sleeves (64) are respectively meshed at adjacent positions of two sets of bevel gears (62), and a spring coil (65) is provided on the outside of the shaft and between the two sets of reversing gear sleeves (64). One set of reversing gear sleeves (64) is slidably sleeved on the outside of the shaft, and a slider provided on the inner ring surface of the reversing gear sleeve (64) is slidably engaged with the transverse groove provided on the outside of the rotating rod. A rectangular push frame (66) is slidably sleeved on the outside of the shaft and adjacent to the sliding reversing gear sleeve (64). A cylinder (67) is provided between the end of the rectangular push frame (66) and the inner wall of the front end of the positioning frame (61).

8. The low-loss corn threshing structure for a corn kernel harvester according to claim 1, characterized in that, The top of the substrate (2) is hinged to a friction plate (7) at the end away from the transmission toothed roller (38), and one set of the friction plate (7) is fed into the top surface of the acceleration roller (5). The bottom surface of the friction plate (7) is provided with several sets of triangular friction strips (71).

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