A threshing device for a maize crop

Abstract

The present application belongs to the technical field of agricultural machinery, and particularly relates to a threshing device for corn crops, which comprises a box body and a threshing unit. The box body is divided into a threshing cavity and a power cavity by a partition plate. The partition plate is provided with a plurality of vertical channels. A plurality of transmission belts are arranged in the power cavity. The plurality of transmission belts correspond to the plurality of channels one by one. The plurality of transmission belts are connected to the output end of a first driving part. A plurality of groups of threshing teeth are arranged on each transmission belt at intervals. The threshing teeth are transmitted to the side of the partition plate, pass through the channels, and enter the threshing cavity. A moving frame is arranged in the threshing cavity. The moving frame is provided with a plurality of rectangular material placing grooves which are adapted to the channels and arranged at intervals. A rotating plate is rotatably connected to the bottom of each material placing groove. The moving frame is installed on the output end of a second driving part to realize intermittent movement of the moving frame. The rotating plate rotates through a gear and rack set when the moving frame moves. The device can effectively reduce the damage to corn kernels during the threshing of corn cobs and ensure the quality of threshing.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, specifically relating to a threshing device for corn crops. Background Technology

[0002] Currently, agricultural research at the Academy of Agricultural Sciences, in addition to cultivating new crop varieties, is further focusing on the research and design of agricultural machinery, such as corn threshers, grain desanders, and soybean screening machines. The fundamental purpose of developing corn threshers is to address the pain points of efficiency, quality, and cost in food processing through technological innovation. These machines not only optimize primary processing stages but also provide reliable raw materials for deep processing industries such as corn flour, corn grits production, and canning, thus driving the agricultural industry chain towards higher added value. With continuous technological advancements, a wide variety of corn threshing machines are emerging. These machines can automatically complete the initial processing of corn, significantly improving production efficiency, reducing labor and time costs, enhancing harvest quality and efficiency, and minimizing fruit loss and waste.

[0003] However, research on existing corn threshing devices reveals that most currently used corn threshing devices employ rigid compaction or high-speed impact methods, which easily cause kernel damage. They are particularly incompatible with high-moisture-content corn, resulting in relatively low threshing quality. For example, Chinese patent CN105027854B discloses a corn threshing device that first clamps the lower part of the corn cob using a clamping mechanism, aligning the corn cob's axis with the threshing cylinder's axis. Then, a drive motor rotates the threshing cylinder, simultaneously lifting a lifting platform to feed the corn cob into the rotating cylinder. When the corn cob reaches the scraper's position, the scraper threshes the kernels. While this threshing device improves efficiency, the scraper's continuous rigid friction and impact on the corn cob during rotation causes significant damage to the kernels, resulting in a high breakage rate among the threshed kernels. For example, Chinese patent CN215011756U discloses a dust-prevention threshing device for corn deep processing. It includes a main body and a collection box. A motor is located at the front of the main body, with its shaft passing through the main body. The motor shaft is connected to a threshing tooth shaft inside the main body. A vacuum cleaner is located at the rear of the main body, with its duct passing through the main body. Two connecting pipes are located on the outside of the vacuum cleaner, both connecting to the collection box. This device combines threshing teeth with a dust collection device. Although it can absorb and concentrate dust during threshing, the impact and collision between the threshing teeth and the corn cob during threshing still results in a relatively high breakage rate of the corn kernels. For example, Chinese patent CN209030634U discloses a corn kernel stripping device for corn threshing. This device primarily separates corn kernels using a threshing roller and a screening plate. Because the surface of the corn cob is relatively smooth, the high-speed rotating threshing roller requires high-speed impact to thresh the corn during the threshing process, easily damaging the kernels and resulting in a high breakage rate. Therefore, there is an urgent need for a device that achieves low-breakage threshing. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the purpose of this invention is to provide a corn threshing device that can effectively reduce damage to corn kernels and ensure the quality of threshing during the corn cob threshing process.

[0005] The technical solution of this invention is: A corn threshing device, comprising: The threshing chamber has multiple vertical channels on its side walls; Multiple drive belts are located outside the threshing chamber and correspond one-to-one with multiple channels. Each drive belt is provided with threshing teeth. When the threshing teeth are driven to one side of the threshing chamber, they pass through the corresponding channel and enter the threshing chamber. The feeding assembly includes a moving frame, a rotating plate, and a gear and rack assembly. The moving frame is movably disposed within the threshing chamber, and the moving frame includes multiple rectangular feeding slots. The feeding slots are used to axially place the corn. Each feeding slot is rotatably connected to a rotating plate at its bottom, and the rotating plate is connected to the side wall of the threshing chamber through the gear and rack assembly, which is used to rotate the rotating plate during the movement of the moving frame. When the moving frame moves the corn cob to the corresponding channel position, the threshing teeth enter the threshing chamber from one end of the channel through the transmission belt. At this time, the front end of the threshing teeth is inserted from one end of the corn cob to the connection between the corn kernel and the corn cob. Under the transmission action of the transmission belt, the threshing teeth move to the other end of the channel, so as to thresh the corn kernels of the row of corn cobs facing the channel.

[0006] Preferably, the sidewall of the threshing chamber opposite to the channel is further provided with a plurality of elastic pushing components corresponding one-to-one with the channel, the elastic pushing components including: A wedge-shaped pressing block is vertically arranged. The two sides of the wedge-shaped pressing block that are perpendicular to the direction of movement of the moving frame are provided with inclined surfaces. A limit hole is opened on the side wall of the threshing chamber. The end of the wedge-shaped pressing block away from the partition plate is inserted into the limit hole. A roller is rotatably connected to the side of the wedge-shaped pressing block facing the channel. An elastic reset component is disposed outside the threshing chamber and connected to the wedge-shaped push block, used to realize the telescopic movement of the wedge-shaped push block within the limiting hole.

[0007] Preferably, a voltage stabilizing component is further provided at the top of the threshing chamber, the voltage stabilizing component comprising: An electric telescopic rod is vertically fixed to the top outside of the threshing chamber; A push block is slidably connected to the top wall of the threshing chamber, and the push block is connected to the telescopic end of the electric telescopic rod. The upper side of the push block is provided with an inclined surface. The lifting plate is horizontally attached to the inclined surface of the pusher block, and the lower side of the lifting plate is fixed to the top wall of the threshing chamber by a second spring. Multiple push rods are vertically arranged. The upper end of each push rod is fixedly connected to the lifting plate, and the lower end passes through the top wall of the threshing chamber and enters the threshing chamber. The distance between two adjacent push rods is equal to the distance between two adjacent material feeding troughs.

[0008] Preferably, the bottom of the material placement trough is provided with an inclined plate, and the upper side of the inclined plate is provided with a placement groove. The rotating plate is embedded in the placement groove, and a rotating seat coaxial with the rotating plate is rotatably connected in the placement groove. The rotating seat is connected to the gear and rack assembly, and a third spring is provided between the rotating plate and the rotating seat. Multiple positioning pins are arranged on the side of the rotating seat facing the rotating plate. One end of the pin tip is inserted through the rotating plate, and the pin tip is lower than the opening of the placement groove.

[0009] Preferably, the threshing tooth is composed of a straight tooth section and a helical tooth section. The cross-section of the straight tooth section is trapezoidal, and the end of the straight tooth section with the larger base is perpendicularly fixed to the transmission belt. The end of the straight tooth section with the smaller base is connected to the helical tooth section. The angle between the extension lines of the helical tooth section and the straight tooth section is 0°-60°.

[0010] Preferably, a feeding hopper is provided at one of the openings of the threshing chamber. The feeding hopper includes an upper cavity and a lower cavity. A material distribution plate is provided between the upper cavity and the lower cavity. The material distribution plate has multiple feeding holes. The multiple feeding holes are linearly distributed along the moving direction of the moving frame, and the distance between two adjacent feeding holes and two adjacent material troughs is equal. The lower cavity is connected to the threshing chamber, and the two form a continuous channel for the movement of the moving frame.

[0011] Preferably, a collection box is provided at the bottom of the threshing chamber, the upper side of the collection box is open, and a baffle is provided on the upper side of the opening of the collection box. The baffle is located on the other opening side of the threshing chamber and is connected to both the threshing chamber and the collection box. A screening plate is inclinedly arranged inside the collection box, and a flexible extrusion mechanism is provided on the upper side of the screening plate for secondary threshing of the corn cobs entering the material chamber.

[0012] Preferably, the flexible extrusion mechanism includes: Two extrusion rollers are symmetrically arranged on both sides of the collection box. The two extrusion rollers rotate towards each other and an extrusion gap is reserved between them. Each extrusion roller has multiple flexible extrusion strips arranged in a circular array. The length of the flexible extrusion strips is adapted to the length of the extrusion roller. Two guide plates are disposed opposite to and inclined on the upper side of the two extrusion rollers, with the lower ends of the two guide plates in the inclined direction close to each other and positioned above the extrusion gap.

[0013] Preferably, both the flexible extrusion bar and the threshing teeth are made of rubber.

[0014] Compared with the prior art, the corn threshing device of the present invention has the following beneficial effects: When this device threshes corn cobs, the moving frame is first pulled out from one side of the threshing chamber, and the corn cobs are placed one by one into each feeding trough. Due to the rectangular limit of the feeding trough, the corn cobs are always kept in an axial position. Then, the moving frame is driven to intermittently push into the threshing chamber, so that the corn cobs on the moving frame pass through the position of each channel one by one, until the moving frame is pushed out from the other side of the threshing chamber. During the intermittent movement of the moving frame, the rotating plate rotates once for each movement of the moving frame through the action of the gear and rack set. At the same time, multiple transmission belts drive synchronously during the intermittent movement of the moving frame. When the moving frame moves forward once intermittently, it carries the corn cobs to the... At different channel positions, the transmission belt drives the threshing teeth to enter the threshing chamber from one end of the channel. After entering the threshing chamber, the threshing teeth insert into the corn cob at the connection between the corn kernel and the corn cob. Then, under the transmission action of the transmission belt, they drive out of the threshing chamber from the other end of the channel, thus completing an axial cutting and threshing of the corn cob. The axial threshing method of the threshing teeth and the corn cob can effectively reduce the damage to the corn kernels. At the same time, the multiple sets of threshing teeth arranged at intervals on the transmission belt are adapted to the intermittent movement of the moving frame, further avoiding lateral compression and damage to the corn kernels caused by the threshing teeth when the moving frame moves, ensuring the integrity of the corn kernels, resulting in higher threshing quality, and facilitating subsequent storage and processing of the corn. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure from a first perspective in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure from a second perspective in an embodiment of the present invention; Figure 3 This is a longitudinal sectional view of the overall structure in an embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of an embodiment of the present invention; Figure 5 This is a schematic diagram of the distribution structure of the transmission belt in an embodiment of the present invention; Figure 6 This is a schematic diagram of the elastic pushing component in an embodiment of the present invention; Figure 7 for Figure 2 Enlarged structural diagram at point A; Figure 8 This is a schematic diagram of the voltage regulator component in an embodiment of the present invention; Figure 9 This is a schematic diagram of the internal structure of the threshing chamber in an embodiment of the present invention; Figure 10 This is a partial structural diagram of the box in an embodiment of the present invention; Figure 11 This is a schematic diagram of the internal structure of the inclined plate in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the first driving component in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Casing; 2. Threshing chamber; 3. Power chamber; 4. Channel; 5. First drive unit; 51. First motor; 52. First driving gear; 53. First driven gear; 54. Pulley; 55. Belt; 56. Shaft; 57. Sprocket; 58. Chain; 6. Transmission belt; 7. Threshing teeth; 71. Straight tooth section; 72. Helical tooth section; 8. Second drive unit; 81. Stepper motor; 82. Slide groove; 83. Sliding plate; 84. Stud; 9. Moving frame; 10. Rotating plate; 11. Gear and rack assembly; 111. Straight gear; 112. Rack; 12. Elastic pushing assembly; 121. Wedge-shaped pushing block; 122. Guide post; 123. Limiting plate; 124. 125. First spring; 126. Limiting hole; 13. Roller; 14. Pressure stabilizing assembly; 15. Electric telescopic rod; 16. Push block; 17. Lifting plate; 18. Second spring; 19. Push rod; 10. Connecting rod; 11. Inclined plate; 122. Placement slot; 133. Rotating seat; 14. Third spring; 15. Positioning pin; 16. Feed hopper; 27. Distributing plate; 28. Feeding hole; 29. ​​Collection box; 20. Baffle cover; 20. Screening plate; 21. Flexible extrusion mechanism; 22. Extrusion roller; 23. Flexible extrusion strip; 24. Guide plate; 25. Baffle; 26. Second driving gear; 27. Second driven gear; 28. Separator plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] 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.

[0019] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0020] See Figures 1 to 12As shown, in order to effectively reduce damage to corn kernels and ensure threshing quality during the corn cob threshing process, this embodiment provides a corn threshing device, including a housing 1 and a threshing unit. The threshing unit is disposed inside the housing 1. The housing 1 is divided into a threshing chamber 2 and a power chamber 3 by a vertically arranged partition plate 29. The partition plate 29 is the side wall of the threshing chamber 2 facing the power chamber 3. Both ends of the threshing chamber 2 perpendicular to the partition plate 29 are open, one end being the inlet and the other end being the outlet. Furthermore, multiple vertical channels 4 are opened horizontally on the partition plate 29.

[0021] The threshing unit includes a threshing module, a first drive unit 5, a feeding assembly, and a second drive unit 8. The threshing module includes multiple drive belts 6 and threshing teeth 7 disposed on each drive belt 6. Preferably, multiple threshing teeth 7 are provided, and are sequentially fixed on the drive belts 6 along the transmission direction of the drive belts. The threshing teeth 7 are preferably made of a rigid material, such as stainless steel. Each drive belt 6 corresponds one-to-one with a multiple channel 4. The multiple drive belts 6 are located outside the threshing chamber 2, and the belt surface of the drive belts 6 is parallel to the separator plate 29. All multiple drive belts 6 are connected to the output end of the first drive unit 5. It should be noted that the transmission direction of the drive belt 6 facing the separator plate 29 is parallel to the vertical direction of the channel 4, and the transmission length of the drive belt 6 facing the channel 4 should be adapted to the vertical length of the channel 4. Furthermore, the multiple threshing teeth 7 on the transmission belt 6 are arranged sequentially along the transmission direction of the transmission belt 6. The multiple threshing teeth 7 on each transmission belt 6 are divided into multiple groups, and the multiple groups of threshing teeth 7 are arranged at intervals. Each group of threshing teeth 7 is continuously arranged. It should be noted that the interval length between two adjacent groups of threshing teeth 7 should not be less than the length of the channel. When the threshing teeth 7 are driven to one side of the threshing chamber 2, they pass through the channel 4 sequentially and enter the threshing chamber 2. Preferably, the width of the threshing teeth 7 is adapted to the longitudinal width of the channel 4, and the fit clearance should be less than 1mm to reduce the probability of corn entering the box 1. The feeding assembly includes a moving frame 9, a rotating plate 10, and a gear and rack assembly 11. The moving frame 9 is inserted into the threshing chamber 2. Multiple rectangular feeding slots adapted to the channels 4 are spaced apart on the moving frame 9. These slots are used to axially place corn cobs. The bottom of each feeding slot is rotatably connected to the rotating plate 10, which is connected to the side wall of the threshing chamber 2 via the gear and rack assembly 11. This allows the rotating plate 10 to rotate during the movement of the moving frame 9. (To ensure that all corn kernels on the corn cob are fully threshed within the threshing chamber, it is preferable that the rotation angle of the rotating plate 10 is designed based on 360 / n, where n is the axial column number of the corn.) The moving frame 9 is installed at the output end of the second drive unit 8. The second drive unit 8 enables the moving frame 9 to move in a regular, intermittent linear motion. The unit intermittent distance of the moving frame 9 is adapted to the spacing between two adjacent channels 4, facilitating transmission with the threshing teeth 7.

[0022] Specifically, when this device threshes corn cobs, the second drive unit 8 first pulls the moving frame 9 out from one side of the threshing chamber 2, placing the corn cobs one by one into each feeding trough. Due to the shape of the feeding trough, the corn cobs are kept in an axial position. Then, the second drive unit 8 continues to push the moving frame 9 into the threshing chamber 2 intermittently, so that the corn cobs in the moving frame 9 pass through the position of each channel 4 one by one, until the moving frame 9 is pushed out from the other side of the threshing chamber 2. During the intermittent movement of the moving frame 9, the rotating plate 10 rotates the corn cob once through the action of the gear and rack assembly 11 each time the moving frame 9 moves. At the same time, the moving frame... During the intermittent movement of the moving frame 9, the first drive unit 5 is activated, which drives multiple transmission belts 6 synchronously. The moving frame 9 moves intermittently to the corresponding position in the channel 4. At this time, the transmission belt 6 drives the threshing teeth 7 to enter the threshing chamber 2 from one end of the channel 4, inserting them from one end of the corn cob. This ensures that the front end of the threshing teeth 7 is inserted at the connection between the corn kernel and the cob. Then, under the drive of the transmission belt 6, the threshing teeth 7 exit the threshing chamber 2 from the other end of the channel 4. Thus, during the transmission of the threshing teeth 7 from one end of the channel to the other, the axial row of corn kernels on the corn cob is cut and threshed from the root, effectively ensuring the integrity of the corn. Furthermore, multiple sets of threshing teeth 7 are spaced apart on the transmission belt 6 to match the intermittent movement of the moving frame 9, preventing the threshing teeth 7 from causing lateral compression and damage to the corn kernels during the movement of the moving frame 9. During the threshing process of the corn cob within the threshing chamber 2, most corn kernels, along with the moving frame 9 and the corn cob, exit from the outlet of the threshing chamber 2. After screening, a small portion of the corn kernels enters the power chamber 3 through the channel 4 and is collected by the discharge port at the bottom of the power chamber 3. This method of threshing the corn cob effectively reduces damage to the kernels, ensuring their integrity and resulting in higher threshing quality. This facilitates subsequent storage and processing of the corn. Furthermore, the axial threshing method promotes complete separation of the kernels from the cob, reducing kernel residue and ensuring more complete removal of the kernels from the cob, resulting in a higher threshing rate.

[0023] See Figure 2 , Figure 6 and Figure 7As shown, furthermore, to ensure that the corn cobs are fully separated by the threshing teeth 7 after reaching the position of channel 4, reducing damage, facilitating threshing in one go, and reducing the damage rate, multiple elastic pushing components 12 corresponding to channels 4 are also provided on the side wall of the threshing chamber 2 opposite to the partition plate 29. The elastic pushing component 12 includes a wedge-shaped pushing block 121, a guide post 122, a limiting plate 123, and a first spring 124. The wedge-shaped pushing block 121 is vertically arranged, and inclined surfaces are provided on both sides of the wedge-shaped pushing block 121 perpendicular to the direction of movement of the moving frame 9. A limiting hole 125 is opened on the side wall of the threshing chamber 2. The end of the wedge-shaped pushing block 121 away from the partition plate 29 is inserted into the limiting hole 125, and a roller 126 is rotatably connected to the side of the wedge-shaped pushing block 121 facing the channel 4; one end of the guide post 122 is fixedly connected to the wedge-shaped pushing block 121, and the other end passes through the limiting hole 125 and out of the threshing chamber 2; as shown Figure 8 As shown, the limiting plate 123 is fixed to one end of the guide post 122 that protrudes from the threshing chamber 2; the first spring 124 is fitted on the side wall of the guide post 122 located outside the threshing chamber 2, and one end of the first spring 124 is fixed to the threshing chamber 2, and the other end is fixed to the limiting plate 123.

[0024] During use, when the moving frame 9 moves, the partition between two adjacent feeding slots within the moving frame 9 presses against the inclined surface of the wedge-shaped pressing block 121, causing the wedge-shaped pressing block 121 to retract into the limiting hole 125. When the moving frame 9 moves to a position where the feeding slot is opposite to the channel 4, the retracted wedge-shaped pressing block 121 separates from the partition. Under the action of the first spring 124, the wedge-shaped pressing block 121 moves into the feeding slot, pushing the corn cob towards the channel 4. This ensures that the corn cob can fully contact the threshing tooth 7 when it arrives, facilitating thorough threshing of the corresponding row of corn kernels in a single contact, avoiding repeated threshing and effectively reducing the damage rate of the corn kernels. Furthermore, by setting a roller 126 at the position of the wedge-shaped pressing block 121 facing the channel 4, the lateral friction and pressing of the wedge-shaped pressing block 121 against the corn kernels can be avoided during the movement of the moving frame 9, making the movement of the corn cob smooth and greatly reducing damage.

[0025] See Figure 1 and Figure 8As shown, furthermore, in order to ensure efficient stability when the corn cob comes into contact with the threshing teeth 7 and to reduce damage to the corn kernels during the threshing process, a pressure stabilizing assembly 13 is also provided on the top of the housing 1. The pressure stabilizing assembly 13 includes an electric telescopic rod 131, a pusher block 132, a lifting plate 133, and multiple push rods 135. The electric telescopic rod 131 is vertically fixed to the top of the box 1; the push block 132 is slidably connected to the limiting groove at the top of the box 1, and the push block 132 is connected to the output end of the electric telescopic rod 131. The upper side of the push block 132 is provided with an inclined surface; the lifting plate 133 is horizontally overlapped on the inclined surface of the push block 132, and the lower side of the lifting plate 133 is fixedly connected to the top wall of the box 1 through the second spring 134; multiple push rods 135 are vertically arranged. The upper end of the push rod 135 is fixedly connected to the lifting plate 133, and the lower end passes through the top wall of the box 1 and enters the threshing chamber 2. The distance between two adjacent push rods 135 is equal to the distance between two adjacent material feeding troughs.

[0026] During the threshing process, once the moving frame 9 moves the corn cob to the corresponding position, the electric telescopic rod 131 immediately activates, pulling the push block 132. This causes the lifting plate 133 to move from the upper end of the inclined surface of the push block 132 to the lower end. At this point, under the reset action of the second spring 134, the lifting plate 133 pushes the push rod 135 downwards, causing the lower end of the push rod 135 to contact the upper end of the corn cob, thus limiting the axial position of the corn cob. To accommodate corn cobs of different lengths, an elastic adjustment structure can be further provided at the lower end of the push rod 135. The specific elastic adjustment structure includes a push plate, with a column fixedly connected to the side of the push plate facing the push rod 135. The upper end of the column is inserted into the push rod 135, and the two are coaxial. An elastic element, which can also be a spring, is provided inside both the column and the push rod 135. This allows for better adaptability to corn cobs of different lengths. This design ensures that the upper and lower ends of the corn cob are positioned between the rotating plate 10 and the push plate, resulting in greater stability and better threshing effect when the threshing teeth 7 contact the corn cob, effectively reducing the breakage rate. When the moving frame 9 needs to move, the electric telescopic rod 131 is activated to push the push block 132, causing the push block 132 to lift the lifting plate 133, separating the push plate from the corn cob and facilitating the continued movement of the corn cob.

[0027] See Figure 9 and Figure 11As shown, further, in order to reduce the breakage rate of corn kernels and ensure that the corn kernels on the corn cob can be fully separated, an inclined plate 14 is provided at the bottom of the feeding trough. The upper side of the inclined plate 14 is provided with a placement groove 15 adapted to the rotating plate 10. The rotating plate 10 is embedded in the placement groove 15. A rotating seat 16 coaxial with the rotating plate 10 is rotatably connected in the placement groove 15. The rotating seat 16 is connected to the gear and rack assembly 11. A third spring 17 is provided between the rotating plate 10 and the rotating seat 16. When the third spring 17 is stationary, the upper side of the rotating plate 10 is coplanar with the inclined surface of the upper side of the inclined plate 14. Multiple positioning pins 18 are arranged on the side of the rotating seat 16 facing the rotating plate 10. One end of the pin tip of the positioning pin 18 is inserted through the rotating plate 10, and the pin tip of the positioning pin 18 is lower than the opening of the placement groove 15. Preferably, the multiple positioning pins 18 are arranged in a straight line along the inclined direction of the inclined plate 14. The inclined plate 14 is used to form a stable guide platform at the bottom of the material trough together with the rotating plate 10.

[0028] During the threshing process, when the corn cob is not subjected to external force, its own weight will slightly compress the rotating plate 10, causing a small portion of the tip of the positioning pin 18 to engage with the corn cob. This does not affect the pushing action of the wedge-shaped pusher block 121 on the corn cob. It should be noted that after the positioning pin 18 is set, when the moving frame 9 enters the position of the first channel 4, the wedge-shaped pusher block 121 is first used to adjust and limit the position of the corn cob and the channel 4. Then, the pusher plate is adjusted to push the corn cob from the top. At this time, under the force of the pusher plate, the corn cob will increase the pressure on the rotating plate 10, and the positioning pin 18 will also engage more firmly with the corn cob, improving the stability of the corn cob, ensuring the stability of the threshing teeth 7 when in contact with the corn kernels, and reducing the breakage rate. After the first axial threshing is completed at position 4 of the first channel, the push plate resets, and the moving plate continues to move forward one unit distance. At this time, under the action of the third spring 17, the rotating plate 10 will push the corn cob upward to reduce the insertion of the positioning pin 18 into the corn cob, but will not separate it. This effectively ensures that the rotating plate 10 rotates while driving the corn to rotate. After reaching the position of the next channel 4, the corresponding wedge-shaped pressing block 121 will further limit the horizontal movement of the corn cob. When the push plate repeatedly squeezes the top of the corn cob, it passes through all positions of channel 4 in sequence, thereby ensuring better stability of the corn cob throughout the threshing process, better threshing quality, and further reducing the breakage rate.

[0029] See Figure 5As shown, furthermore, in order to better separate the corn kernels from the corn cob and reduce unnecessary secondary threshing, the threshing tooth 7 is composed of a straight tooth section 71 and an oblique tooth section 72. The cross-section of the straight tooth section 71 is trapezoidal, and the end of the straight tooth section 71 with the larger base is perpendicularly fixed to the transmission belt 6, while the end of the straight tooth section 71 with the smaller base is connected to the oblique tooth section 72. The angle between the extension lines of the oblique tooth section 72 and the straight tooth section 71 is 0°-60°. When the angle between the oblique tooth segment 72 and the straight tooth segment 71 is 0°, the entire threshing tooth 7 is horizontal. When the angle between the oblique tooth segment 72 and the straight tooth segment 71 varies from 0° to 60°, the tip of the threshing tooth 7 can more easily penetrate the root of the corn kernel, facilitating threshing. This allows for the complete removal of a row of kernels at once, preventing secondary threshing of the same row and reducing the number of threshing cycles. Consequently, the number of times the corn kernels come into contact with the threshing tooth 7 is reduced, effectively lowering the breakage rate of the separated corn kernels. In practical tests, when the angle between the oblique tooth segment 72 and the straight tooth segment 71 is greater than 60°, the threshing tooth 7 is more prone to corn cob slippage. This not only results in insufficient threshing but also causes the corn kernels to repeatedly come into contact with the threshing tooth 7 in subsequent cycles due to incomplete threshing, leading to an increased breakage rate.

[0030] See Figure 1 and Figure 2 As shown, to ensure that the corn cobs are stably placed into each feeding slot of the moving frame 9 in an axial position, thereby improving processing efficiency, a feeding hopper 19 is provided at one of the openings (inlets) of the threshing chamber 2. The feeding hopper 19 includes an upper cavity and a lower cavity, and a distribution plate 20 is provided between the upper cavity and the lower cavity. The distribution plate 20 has multiple feeding holes 21, which are linearly distributed along the moving direction of the moving frame 9, and the distance between two adjacent feeding holes 21 and two adjacent feeding slots is equal. Preferably, the number of feeding holes 21 is the same as the number of feeding slots. Furthermore, the lower cavity is connected to the threshing chamber 2, and the two form a continuous channel for the movement of the moving frame 9.

[0031] In use, after all the corn cobs in the moving frame 9 have been threshed, the second drive unit 8 moves the moving frame 9 to the lower cavity of the feed hopper 19. After the moving frame 9 is fully inside the lower cavity, the corn cobs can be precisely placed axially into the feeding troughs through different feeding holes 21, which is convenient and quick. Furthermore, to improve the efficiency of placing corn cobs into the moving frame 9, a baffle 26 that moves synchronously with the moving frame 9 can be fixed to the side of the moving frame 9 facing the feed hopper. The baffle 26 is horizontally set and located below the feeding hole 21. Its end away from the moving frame 9 passes through the side wall of the lower cavity away from the housing 1. Thus, after the moving frame 9 enters the threshing chamber 2, other corn cobs can be pre-placed between the feeding hole 21 and the baffle 26. Then, during the process of the moving frame 9 entering the lower cavity, the pre-placed corn cobs can be smoothly fed into each feeding trough in sequence, without waiting for the moving frame 9 to be fully inside the lower cavity. This can effectively shorten the feeding time and improve processing efficiency.

[0032] See Figures 1 to 3 As shown, furthermore, in order to ensure that the corn kernels on the corn cob are thoroughly separated and to reduce the breakage rate of the corn kernels, the device has a collection box 22 at the bottom of the box 1. The upper side of the collection box 22 is open, and a baffle 23 is provided on the upper side of the opening of the collection box 22. The baffle 23 is located at another opening of the threshing chamber 2, and the baffle is connected to both the threshing chamber 2 and the collection box 22. A screening plate 24 is inclinedly arranged inside the collection box 22, and a flexible extrusion mechanism 25 is provided on the upper side of the screening plate 24 for secondary threshing of the corn cobs entering the material chamber. The flexible extrusion mechanism 25 includes an extrusion roller 251, a flexible extrusion strip 252, and a guide plate 253. Specifically, there are two extrusion rollers 251, symmetrically arranged on both sides of the collection box 22, and an extrusion gap is reserved between them. Preferably, the extrusion gap can be adjusted by moving the two extrusion rollers 251 according to different varieties of corn, and the width of the extrusion gap is slightly larger than the diameter of the corn cob. Each extrusion roller 251 has a circumferential array of multiple flexible extrusion strips 252, all made of rubber. The length of each flexible extrusion strip 252 is adapted to the length of the extrusion roller 251. The extrusion roller 251 is connected to the output end of the first drive unit 5. There are also two guide plates 253, which are arranged opposite each other and inclined on the upper side of the two extrusion rollers 251. The lower ends of the two guide plates 253 in the inclined direction are close to each other and positioned above the extrusion gap.

[0033] Specifically, the corn cobs in the moving frame 9 are threshed in the threshing chamber 2 by the threshing teeth 7. The threshed corn cobs are pushed to the upper side of the collection box 22 by the second drive unit 8. At this time, under the mechanical vibration of the device itself and the action of the third spring 17, the corn cobs on the rotating plate 10 will be threshed by the threshing positioning needle 18 and fall into the collection box 22 under the protection of the baffle cover. At the same time, the separated corn kernels will also enter the collection box 22 through the inclined plate 14 and the inclined surface of the rotating plate 10. The corn kernels will be directly separated to the bottom of the collection box 22 by the screening plate 24, while the corn cobs will be first limited by the two guide plates 253 and then conveyed to the two extrusion rollers 251 in sequence. Through the rotation of the two extrusion rollers 251, the flexible strip and the pressure bar will further separate the corn kernels remaining on the corn cobs, so that the corn kernels are fully separated. At the same time, the flexible strip and the pressure bar can effectively ensure the integrity of the corn kernels and reduce the breakage rate.

[0034] See Figure 2 and Figure 12 As shown, further, in order to realize the transmission of multiple transmission belts 6 and the rotation of the subsequent two extrusion rollers 251, the first drive assembly includes a first motor 51, a first drive gear 52, a first driven gear 53, two pulleys 54, a belt 55, two rotating shafts 56, multiple sprockets 57 and multiple chains 58. The first motor 51 is fixedly connected to the outer wall of the collection box 22, and its output shaft is coaxially fixedly connected to one of the extrusion rollers 251. The first drive gear 52 is mounted on the output shaft of the first motor 51 and meshes with the first driven gear 53. The first driven gear 53 is mounted on a connecting shaft, which is rotatably connected to the collection box 22 and one end is coaxially fixed to the other extrusion roller 251. Furthermore, two rotating shafts 56 are arranged parallel vertically within the power cavity 3 and rotatably connected to the side wall of the power cavity 3. The ends of both rotating shafts 56 near the first motor 51 extend out of the housing 1. A pulley 54 is fitted onto the output shaft of one of the rotating shafts 56, and the two pulleys 54 are connected by a belt 55. Multiple sprockets 57 are fitted onto each of the two rotating shafts 56 within the power cavity 3, and corresponding sprockets 57 are connected by chains 58. These chains 58 correspond one-to-one with multiple transmission belts 6, and each transmission belt 6 is fixedly wrapped around its corresponding chain 58. Thus, during operation, the first motor 51, through the engagement of the first driving gear 52 and the first driven gear 53, drives the two pressing rollers 251 to rotate. The engagement of the two pulleys 54 and the belt 55 directly drives one of the rotating shafts 56 to rotate, while the engagement of the two rotating shafts 56 with the sprockets 57 and the chains 58 enables the movement of multiple transmission belts 6.

[0035] See Figure 3 and Figure 12As shown, furthermore, to facilitate the reciprocating movement of the moving frame 9 between the upper side of the collection box 22, the threshing chamber 2, and the feed hopper, the second drive unit 8 includes a stepper motor 81, a chute 82, a sliding plate 83, and a stud 84. The chute 82 is horizontally inserted into the threshing chamber 2 and fixedly connected to the bottom wall of the threshing chamber 2, and both ends of the chute 82 extend into the baffle cover and the feed hopper 19, respectively. The sliding plate 83 is slidably connected to the chute 82, and the sliding plate 83 is detachably connected to the moving frame 9. The stud 84 is rotatably connected to the chute 82, and the sliding plate 83 is fitted onto the stud 84. The sliding plate 83 and the stud 84 are screwed together, and one end of the stud 84 extends out of the feed hopper 19 and is connected to the stepper motor 81. In use, the stepper motor 81 can drive the stud 84 to rotate intermittently at a set time interval. When the stud 84 rotates, the threaded structure with the sliding plate 83 allows the sliding plate 83 to move within the groove 82. The intermittent rotation of the stud 84 also causes the intermittent movement, which in turn causes the moving frame 9 to move intermittently with the corn cob within the threshing chamber 2 and engage with the threshing teeth 7 at each position of the channel 4 to achieve threshing.

[0036] See Figure 3 and Figure 9 As shown, furthermore, to ensure that the power unit is positioned between the sliding plate 83 and the moving frame 9, the gear and rack assembly 11 includes multiple spur gears 111 and racks 112. Each spur gear 111 corresponds one-to-one with a multiple rotating plate 10. The spur gear 111 is fixedly connected to its corresponding rotating seat 16 via a drive shaft, thus indirectly connecting to the rotating plate 10. The rack 112 is fixedly connected to the side wall of the threshing chamber 2, and meshes with all the spur gears 111. Therefore, when the moving frame 9 moves, the spur gears 111, through meshing with the racks 112, drive the drive shaft to rotate. The drive shaft then drives the rotating seat 16 to rotate. Under the action of the third spring 17 and the positioning pin 18, the rotating seat 16 rotates the rotating plate 10, facilitating the rotation of the corn cob and its engagement with the threshing teeth 7 at different positions for threshing.

[0037] See Figure 1 and Figure 2 As shown, to improve threshing efficiency, this device further incorporates at least two partition plates 29 within the housing 1, forming at least two threshing chambers 2 and a power chamber 3. The power chamber 3 is positioned between the two threshing chambers 2. Identical feeding assemblies are installed in both threshing chambers 2. Driven by a transmission belt 6 within the power chamber 3, the threshing teeth 7 on the transmission belt 6 simultaneously pass through the channels 4 on the two partition plates 29, acting on the corn cobs within the two threshing chambers 2. Furthermore, to save energy and cost, such as... Figure 11As shown, the second drive unit 8 in the two feeding assemblies can share a single stepper motor 81. When using a single stepper motor 81, a second driving gear 27 and a second driven gear 28 with meshing configuration need to be added. The second driving gear 27 and the second driven gear 28 are then respectively mounted and fixed onto two studs 84. Furthermore, when setting up two sets of feeding assemblies, two sets of voltage stabilizing assemblies 13 are also designed accordingly. To save costs, such as... Figure 7 As shown, the two sets of voltage stabilizing components 13 share a single electric telescopic rod 131. Specifically, the electric telescopic rod 131 is vertically fixed to the top of the housing. Two connecting rods 136 are hinged to the telescopic end of the electric telescopic rod 131. The ends of the two connecting rods 136 away from the electric telescopic rod 131 are respectively hinged to a corresponding push block 132. Thus, the two push blocks 132 can move back and forth by raising and lowering the electric telescopic rod 131, which facilitates the pressure stabilization of the corn cob by the push rod 135.

[0038] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A corn threshing device, characterized in that, include: The threshing chamber (2) has multiple vertical channels (4) on its side wall. Multiple transmission belts (6) are located outside the threshing chamber (2) and correspond one-to-one with multiple channels (4). Each transmission belt (6) is provided with threshing teeth (7). When the threshing teeth (7) are driven to one side of the threshing chamber (2), they pass through the corresponding channel (4) and enter the threshing chamber (2). The feeding assembly includes a moving frame (9), a rotating plate (10), and a gear and rack assembly (11). The moving frame (9) is movably disposed in the threshing chamber (2), and the moving frame (9) includes multiple rectangular feeding slots. The feeding slots are used to axially place the corn. The bottom of each feeding slot is rotatably connected to a rotating plate (10), and the rotating plate (10) is connected to the side wall of the threshing chamber (2) through the gear and rack assembly (11) to realize the rotation of the rotating plate (10) during the movement of the moving frame (9). When the moving frame (9) moves the corn cob to the corresponding channel (4) position, the threshing teeth (7) are driven by the transmission belt (6) to enter the threshing chamber (2) from one end of the channel (4). At this time, the front end of the threshing teeth (7) is inserted from one end of the corn cob to the connection between the corn kernel and the corn cob. Under the transmission action of the transmission belt (6), the threshing teeth (7) move to the other end of the channel (4) to thresh the corn kernels of the corn cob facing the channel (4). On the side wall opposite to the channel (4) of the threshing chamber (2), a plurality of elastic pushing components (12) corresponding to the channel (4) are also provided. The elastic pushing components (12) include: a wedge-shaped pushing block (121), one end of which is inserted into a limiting hole (125) reserved on the side wall of the threshing chamber (2), and the wedge-shaped pushing block (121) is provided with inclined surfaces on both sides perpendicular to the moving direction of the moving frame (9). The side of the wedge-shaped pushing block (121) facing the channel (4) is rotatably connected to a roller (126); an elastic reset member is provided on the outside of the threshing chamber (2) and connected to the wedge-shaped pushing block (121) to realize the telescopic movement of the wedge-shaped pushing block (121) in the limiting hole (125); An inclined plate (14) is provided at the bottom of the material placement trough. A placement groove (15) is provided on the upper side of the inclined plate (14). The rotating plate (10) is embedded in the placement groove (15). A rotating seat (16) coaxial with the rotating plate (10) is rotatably connected in the placement groove (15). The rotating seat (16) is connected to the gear rack assembly (11). A third spring (17) is provided between the rotating plate (10) and the rotating seat (16). A plurality of positioning pins (18) are arranged on the side of the rotating seat (16) facing the rotating plate (10). One end of the pin tip of the positioning pin (18) is inserted through the rotating plate (10), and the pin tip of the positioning pin (18) is lower than the opening of the placement groove (15).

2. The corn threshing device according to claim 1, characterized in that, The top of the threshing chamber (2) is also provided with a voltage stabilizing component (13), which includes: An electric telescopic rod (131) is vertically fixed to the outside of the top of the threshing chamber (2); Push block (132) is slidably connected to the top wall of the threshing chamber (2), and push block (132) is connected to the telescopic end of the electric telescopic rod (131). The upper side of push block (132) is provided with an inclined surface. The lifting plate (133) is horizontally attached to the inclined surface of the push block (132), and the lower side of the lifting plate (133) is fixedly connected to the top wall of the threshing chamber (2) by a second spring (134); Multiple push rods (135) are vertically arranged. The upper end of the push rod (135) is fixedly connected to the lifting plate (133), and the lower end passes through the top wall of the threshing chamber (2) and enters the threshing chamber (2). The distance between two adjacent push rods (135) is equal to the distance between two adjacent material feeding troughs.

3. The corn threshing device according to claim 1, characterized in that, The threshing tooth (7) is composed of a straight tooth section (71) and a helical tooth section (72). The cross-section of the straight tooth section (71) is trapezoidal, and the end of the straight tooth section (71) with a larger base is perpendicularly fixed to the transmission belt (6). The end of the straight tooth section (71) with a smaller base is connected to the helical tooth section (72). The angle between the extension lines of the helical tooth section (72) and the straight tooth section (71) is 0°-60°.

4. A corn threshing device according to claim 1, characterized in that, A feeding hopper (19) is provided at one of the openings of the threshing chamber (2). The feeding hopper (19) includes an upper cavity and a lower cavity. A material distribution plate (20) is provided between the upper cavity and the lower cavity. The material distribution plate (20) has multiple feeding holes (21). The multiple feeding holes (21) are linearly distributed along the moving direction of the moving frame (9), and the distance between two adjacent feeding holes (21) and two adjacent material troughs is equal. The lower cavity is connected to the threshing chamber (2) and the two form a continuous channel for the moving frame (9) to move.

5. A corn threshing device according to claim 4, characterized in that, The bottom of the threshing chamber (2) is provided with a collection box (22). The upper side of the collection box (22) is open, and a baffle (23) is provided on the upper side of the opening of the collection box (22). The baffle (23) is located on the other opening side of the threshing chamber (2), and the baffle is connected to the threshing chamber (2) and the collection box (22) respectively. A screening plate (24) is inclinedly arranged inside the collection box (22). A flexible extrusion mechanism (25) is provided on the upper side of the screening plate (24) for secondary threshing of the corn cobs entering the material chamber.

6. A corn threshing device according to claim 5, characterized in that, The flexible extrusion mechanism (25) includes: Two extrusion rollers (251) are symmetrically arranged on both sides of the collection box (22). The two extrusion rollers (251) rotate towards each other and an extrusion gap is reserved between them. Each extrusion roller (251) has a plurality of flexible extrusion strips (252) arranged in a circular array. The length of the flexible extrusion strips (252) is adapted to the length of the extrusion roller (251). Two guide plates (253) are disposed opposite to each other and inclined on the upper side of the two extrusion rollers (251), with the lower ends of the two guide plates (253) in the inclined direction close to each other and positioned above the extrusion gap.

7. A corn threshing device according to claim 6, characterized in that, The flexible extrusion bar (252) and the threshing teeth (7) are both made of rubber.

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