Threshing device for corn crops

Abstract

The invention belongs to the technical field of agricultural machinery, and particularly relates to a corn crop threshing device which comprises a box body and a threshing unit, the interior of the box body is divided into a threshing cavity and a power cavity through a partition plate, and a plurality of vertical channels are formed in the partition plate. A plurality of transmission belts are arranged in the power cavity, the transmission belts are in one-to-one correspondence with the channels, the transmission belts are connected to the output end of the first driving part, a plurality of sets of threshing teeth are arranged on each transmission belt at intervals, and the threshing teeth are transmitted to one side of the partition plate, penetrate through the channels and enter the threshing cavity; a moving frame is inserted into the threshing cavity, a plurality of rectangular material containing grooves matched with the channels are formed in the moving frame at intervals, the bottom of each material containing groove is rotationally connected with a rotating plate, the moving frame is installed at the output end of the second driving part so that intermittent movement of the moving frame can be achieved, and the rotating plates rotate through gear and rack sets when the moving frame moves. The corn threshing device can effectively reduce damage to corn kernels in the corn cob threshing process, and the threshing quality is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural machinery, and particularly relates to a threshing device for corn crops. Background Art

[0002] Currently, in the scientific research work of agricultural academies, in addition to the cultivation of new crop varieties, research and design of agricultural machinery are further carried out, such as corn threshers, grain sand removers, and soybean sieving machines. Among them, the fundamental purpose of developing corn threshers is to solve the pain points of efficiency, quality, and cost in food processing through technological innovation. These devices not only optimize the primary processing link but also provide reliable raw materials for deep processing industries such as corn flour production, grits production, and canning, promoting the extension of the agricultural industrial chain to high added value. Currently, with the continuous progress of technology, the types of corn threshing machinery are emerging in an endless stream. These mechanical devices can automatically complete the preliminary processing of corn, greatly improving production efficiency, reducing labor and time costs, improving the harvesting quality and efficiency, and at the same time reducing fruit loss and waste.

[0003] However, through the research on existing corn threshing devices, it is found that most of the current corn threshing devices for various production applications use rigid rolling or high-speed impact methods for threshing, which are likely to cause damage to the grains. In particular, they have poor adaptability to high-moisture corn, and the threshing quality is relatively low. For example, the Chinese patent with the publication number CN105027854B discloses a corn threshing device. When threshing a corn cob, it first clamps the lower part of the corn cob through a clamping mechanism and adjusts the axis of the corn cob to correspond to the axis of the threshing cylinder. Then, the driving motor drives the threshing cylinder to rotate, and at the same time drives the lifting table to rise, so as to send the corn cob into the rotating threshing cylinder. When the corn cob rises to the position of the scraper, the scraper threshes the corn cob. Although this threshing device can improve the threshing efficiency, during the rotation of the corn cob, due to the continuous rigid friction and impact on the corn cob by the scraper, it causes a large degree of damage to the corn kernels, and the damage rate in the shed corn kernels is high. Another example is the Chinese patent with the publication number CN215011756U, which discloses a threshing and dust-proof device for deep processing of corn. It includes a device main body and a collection box. A motor is arranged on the front side of the device main body. The shaft of the motor penetrates the device main body, and the shaft of the motor is connected with a threshing tooth shaft inside the device main body. A dust collector is arranged on the rear side of the device main body, and the air duct of the dust collector penetrates the device main body. Two through pipes are arranged on the outside of the dust collector, and both through pipes are connected and penetrate the collection box. This device combines threshing teeth with a dust suction device. Although it can absorb and centrally process dust during threshing, the breaking rate of the corn kernels caused by the impact and collision between the threshing teeth and the corn cob during threshing is still relatively high. Another example is the Chinese patent with the publication number CN209030634U, which discloses a corn kernel peeling device for corn threshing. It mainly separates the corn kernels through a threshing roller and a screening plate. Since the overall surface of the corn cob is relatively smooth, during the threshing process, the high-speed rotating threshing stick needs to achieve threshing of the corn cob under the action of high-speed impact, which is easy to impact and damage the corn kernels, and the damage rate is also relatively high. Therefore, there is an urgent need for a device that can achieve low-damage threshing. Summary of the Invention

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

[0005] The technical solution of the present invention is as follows: A threshing device for corn crops, comprising: A threshing cavity, on the side wall of which there are provided a plurality of vertical channels; A plurality of conveyor belts, located outside the threshing cavity and corresponding to the plurality of channels one by one. Each conveyor belt is provided with threshing teeth, and when the threshing teeth are transmitted to one side of the threshing cavity, they pass through the corresponding channels and enter the threshing cavity; The feeding component includes a moving frame, a rotating plate and a gear-rack group. The moving frame is movably arranged in the threshing cavity, and the moving frame includes a plurality of rectangular material placing grooves for axially placing the corn. A rotating plate is rotatably connected to the bottom of each material placing groove, and the rotating plate is connected to the side wall of the threshing cavity through the gear-rack group to rotate the rotating plate during the movement of the moving frame. When the moving frame drives the corncob to move to the corresponding channel position, the threshing teeth enter the threshing cavity from one end of the channel through the transmission of the transmission belt. At this time, the front end of the threshing teeth is inserted into the connection between the corn kernels and the corn cob from one end of the corncob, and under the transmission of the transmission belt, the threshing teeth move to the other end of the channel to thresh a row of corn kernels facing the channel of the corncob.

[0006] Preferably, a plurality of elastic pressing components corresponding to the channels one by one are further arranged on the side wall of the threshing cavity opposite to the channel. The elastic pressing component includes: A wedge-shaped pressing block is vertically arranged. The two sides of the wedge-shaped pressing block perpendicular to the moving direction of the moving frame are provided with inclined surfaces. A limiting hole is opened on the side wall of the threshing cavity. One end of the wedge-shaped pressing block away from the partition plate is inserted into the limiting hole, and a roller is rotatably connected to the side of the wedge-shaped pressing block facing the channel. An elastic resetting member is arranged outside the threshing cavity and is connected to the wedge-shaped pressing block to realize the telescopic movement of the wedge-shaped pressing block in the limiting hole.

[0007] Preferably, a voltage stabilizing component is further arranged on the top of the threshing cavity. The voltage stabilizing component includes: An electric telescopic rod is vertically fixed outside the top of the threshing cavity. A pushing block is slidably connected to the top wall of the threshing cavity, and the pushing block is connected to the telescopic end of the electric telescopic rod. An inclined surface is arranged on the upper side of the pushing block. A lifting plate is horizontally lapped on the inclined surface of the pushing block, and the lower side of the lifting plate is fixedly connected to the top wall of the threshing cavity through a second spring. A plurality of pressing rods are vertically arranged. The upper ends of the pressing rods are fixedly connected to the lifting plate, and the lower ends pass through the top wall of the threshing cavity and enter the threshing cavity. The distance between adjacent two pressing rods is equal to the distance between adjacent two material placing grooves.

[0008] Preferably, an inclined plate is provided at the bottom of the material placing groove. A placing groove is formed on the upper side of the inclined plate. The rotating plate is embedded in the placing groove. A rotating seat coaxial with the rotating plate is rotatably connected in the placing groove. The rotating seat is connected to the gear-rack group. A third spring is provided between the rotating plate and the rotating seat. A plurality of positioning pins are arranged on one side of the rotating seat facing the rotating plate. The tip end of the positioning pin penetrates and is inserted into the rotating plate, and the tip of the positioning pin is lower than the notch of the placing groove.

[0009] Preferably, the threshing teeth are composed of a straight tooth section and an inclined tooth section. The cross-section of the straight tooth section is trapezoidal, and the end with the larger bottom side of the straight tooth section is perpendicularly and fixedly connected to the transmission belt. The end with the smaller bottom side of the straight tooth section is connected to the inclined tooth section. The included angle between the inclined tooth section and the straight tooth section is 0°-60°.

[0010] Preferably, a feed hopper is provided at one of the openings of the threshing cavity. The feed hopper includes an upper cavity and a lower cavity. A material dividing plate is provided between the upper cavity and the lower cavity. A plurality of feeding holes are formed in the material dividing plate. The plurality of feeding holes are linearly distributed along the moving direction of the moving frame, and the distances between adjacent two feeding holes and between adjacent two material placing grooves are equal. The lower cavity is communicated with the threshing cavity and the two form a continuous channel for the movement of the moving frame.

[0011] Preferably, an aggregate box is provided at the bottom of the threshing cavity. The upper side of the aggregate box is open, and a partition cover is provided on the upper side of the opening of the aggregate box. The partition cover is located on the other opening side of the threshing cavity and is communicated with both the threshing cavity and the aggregate box. A screening plate is inclined in the aggregate box. A flexible extrusion mechanism is provided on the upper side of the screening plate for secondary threshing of the corn cobs entering the cavity.

[0012] Preferably, the flexible extrusion mechanism includes: Two extrusion rollers, symmetrically arranged on both sides of the aggregate box. The two extrusion rollers rotate towards each other, and an extrusion gap is reserved between them. A plurality of flexible extrusion strips are circumferentially arranged on each extrusion roller, and the length of the flexible extrusion strip is adapted to the length of the extrusion roller; Two diversion plates, oppositely and obliquely arranged on the upper sides of the two extrusion rollers. The lower ends of the two diversion plates in the inclined direction are close to each other and are placed above the extrusion gap.

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

[0014] Compared with the prior art, a threshing device for corn crops of the present invention has the following beneficial effects: When the device is threshing corn cobs, the moving frame is first pulled out from one side of the threshing cavity, and the corn cobs are placed one by one in each feeding slot. Due to the rectangular limit of the feeding slot, the corn cobs always maintain an axial state. Subsequently, the moving frame is driven to start being pushed into the threshing cavity intermittently, so that the corn cobs on the moving frame pass through the positions of each channel one by one until the moving frame is pushed out from the other side of the threshing cavity. During the intermittent movement of the moving frame, each time the moving frame moves, the rotating plate rotates the corn cob once through the action of the gear-rack group. At the same time, during the intermittent movement of the moving frame, multiple transmission belts are driven to synchronously drive. When the moving frame intermittently moves forward each time and brings the corn cob to different channel positions, at this time, the transmission belt drives the threshing teeth to penetrate into the threshing cavity from one end of the channel. After the threshing teeth penetrate into the threshing cavity, they insert into the corn cob from the connection between the corn kernels and the corn cob core, and then drive out of the threshing cavity from the other end of the channel under the driving action of the transmission belt, thereby completing an axial cutting and threshing of the corn cob. Thus, the axial threshing method of the corn cob by the threshing teeth can effectively reduce the damage of the corn kernels. At the same time, by using multiple groups of threshing teeth arranged at intervals on the transmission belt to match the intermittent movement of the moving frame, further avoiding the lateral extrusion and breakage of the corn kernels caused by the threshing teeth when the moving frame moves, ensuring the integrity of the corn kernels, and having a higher threshing quality, which is convenient for the subsequent storage and processing of corn. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure from the first perspective in the embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure from the second perspective in the embodiment of the present invention; Figure 3 It is a longitudinal sectional view of the overall structure in the embodiment of the present invention; Figure 4 It is a schematic diagram of a partial structure in the embodiment of the present invention; Figure 5 It is a schematic diagram of the distribution structure of the transmission belt in the embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the elastic pressing component in the embodiment of the present invention; Figure 7 It is Figure 2 The enlarged schematic diagram of the structure at A in Figure 8 It is a schematic diagram of the structure of the voltage stabilizing component in the embodiment of the present invention; Figure 9 It is a schematic diagram of the internal structure of the threshing cavity in the embodiment of the present invention; Figure 10 It is a schematic diagram of a partial structure of the box body in the embodiment of the present invention; Figure 11 It is a schematic diagram of the internal structure of the inclined plate in the embodiment of the present invention; Figure 12 This is a schematic structural diagram of the first driving component in the embodiment of the present invention.

[0016] Explanation of reference numerals: 1. Box body; 2. Threshing chamber; 3. Power chamber; 4. Channel; 5. First driving part; 51. First motor; 52. First driving gear; 53. First driven gear; 54. Belt pulley; 55. Belt; 56. Rotating shaft; 57. Sprocket; 58. Chain; 6. Transmission belt; 7. Threshing teeth; 71. Straight tooth section; 72. Helical tooth section; 8. Second driving part; 81. Stepper motor; 82. Slide groove; 83. Slide plate; 84. Stud; 9. Moving frame; 10. Rotating plate; 11. Gear-rack group; 111. Straight gear; 112. Rack; 12. Elastic pressing component; 121. Wedge-shaped pressing block; 122. Guide post; 123. Limiting plate; 124. First spring; 125. Limiting hole; 126. Roller; 13. Voltage stabilizing component; 131. Electric telescopic rod; 132. Pushing block; 133. Lifting plate; 134. Second spring; 135. Pressing rod; 136. Connecting rod; 14. Inclined plate; 15. Placing groove; 16. Rotating seat; 17. Third spring; 18. Positioning pin; 19. Feeding hopper; 20. Material distributing plate; 21. Feeding hole; 22. Aggregate box; 23. Baffle cover; 24. Screening plate; 25. Flexible extrusion mechanism; 251. Extrusion roller; 252. Flexible extrusion strip; 253. Deflector; 26. Baffle; 27. Second driving gear; 28. Second driven gear; 29. Partition plate. Detailed implementation manners

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0018] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0019] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0020] See Figures 1 to 12As shown, in order to effectively reduce the damage to corn kernels during the threshing process of corn cobs and ensure the threshing quality. This embodiment provides a threshing device for corn crops, including a box body 1 and a threshing unit. The threshing unit is arranged inside the box body 1. The inside of the box body 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 openings, one end is the feeding port, and the other end is the discharging port. Furthermore, a plurality of vertical channels 4 are opened in the partition plate 29 in the horizontal direction.

[0021] The threshing unit includes: a threshing module, a first driving part 5, a feeding component and a second driving part 8. The threshing module includes a plurality of transmission belts 6 and threshing teeth 7 arranged on each transmission belt 6. Preferably, a plurality of threshing teeth 7 are provided. The plurality of threshing teeth 7 are sequentially fixed on the transmission belt 6 along the transmission direction of the transmission belt. The threshing teeth 7 are preferably made of rigid materials such as stainless steel materials. The plurality of transmission belts 6 correspond to the plurality of channels 4 one by one. The plurality of transmission belts 6 are located outside the threshing chamber 2 and the belt surface of the transmission belt 6 is arranged parallel to the partition plate 29. The plurality of transmission belts 6 are all connected to the output end of the first driving part 5. It should be noted that the transmission direction of the transmission belt 6 facing the partition plate 29 is parallel to the vertical direction of the channel 4, and the transmission length of the transmission belt 6 facing the channel 4 should be adapted to the vertical length of the channel 4. Furthermore, the plurality of threshing teeth 7 on the transmission belt 6 are sequentially arranged along the transmission direction of the transmission belt 6. The plurality of threshing teeth 7 on each transmission belt 6 are divided into multiple groups. The multiple groups of threshing teeth 7 are arranged at intervals, and each group of threshing teeth 7 is continuously arranged. It should be noted that the interval length between adjacent two groups of threshing teeth 7 should not be less than the length of the channel. When the threshing teeth 7 are transmitted to one side of the threshing chamber 2, they sequentially pass through the channels 4 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 fitting gap should be less than 1 mm to reduce the probability of corn entering the box body 1. Furthermore, the feeding component includes a moving frame 9, a rotating plate 10 and a gear-rack group 11. The moving frame 9 is inserted into the threshing chamber 2. A plurality of rectangular material placement grooves adapted to the channels 4 are arranged at intervals on the moving frame 9. The material placement grooves are used for axially placing corn cobs. A rotating plate 10 is rotatably connected to the bottom of each material placement groove, and the rotating plate 10 is connected to the side wall of the threshing chamber 2 through the gear-rack group 11 for realizing the rotation of the rotating plate 10 during the movement of the moving frame 9 (in order to ensure that the corn kernels on the entire corn cob can be fully threshed in the threshing chamber, preferably, the rotation angle of the rotating plate 10 each time is designed according to 360 / n, where n is the number of axial rows of corn). The moving frame 9 is installed at the output end of the second driving part 8, and the second driving part 8 is used to realize the regular intermittent linear movement of the moving frame 9, and the unit intermittent distance of the moving frame 9 is adapted to the distance between adjacent two channels 4 for facilitating the transmission cooperation with the threshing teeth 7.

[0022] Specifically, when the device is threshing corn cobs, the second driving part 8 is used to first draw out the moving frame 9 from one side of the threshing cavity 2, and the corn cobs to be processed are placed one by one in each feeding groove. Due to the shape of the feeding groove, the corn cobs always maintain an axial state. Subsequently, the second driving part 8 is used to continue to push the moving frame 9 into the threshing cavity 2 in an intermittent manner, so that the corn cobs in the moving frame 9 pass through the positions of each channel 4 one by one until the moving frame 9 is pushed out from the other side of the threshing cavity 2. During the intermittent movement of the moving frame 9, each time the moving frame 9 moves, the rotating plate 10 rotates the corn cob once through the action of the gear-rack group 11. At the same time, during the intermittent movement of the moving frame 9, the first driving part 5 is started, and the first driving part 5 drives a plurality of transmission belts 6 to synchronously drive. Each time the moving frame 9 intermittently moves to the corresponding channel 4 position, at this time, the transmission belt 6 drives the threshing teeth 7 to penetrate into the threshing cavity 2 from one end of the channel 4, and the threshing teeth 7 are inserted into one end of the corn cob, that is, the front end of the threshing teeth 7 is inserted into the connection between the corn kernels and the corn cob core. Then, under the drive of the transmission belt 6, the threshing teeth 7 drive out of the threshing cavity 2 from the other end of the channel 4. Therefore, during the transmission of the threshing teeth 7 from one end of the channel to the other end, an axial row of corn kernels on the corn cob is cut and threshed from the root, which can effectively ensure the integrity of the corn. Moreover, multiple groups of threshing teeth 7 are arranged at intervals on the transmission belt 6 to match the intermittent movement of the moving frame 9, avoiding lateral extrusion damage to the corn kernels by the threshing teeth 7 when the moving frame 9 moves. During the process of the corn cob moving and being threshed in the threshing cavity 2, most of the corn kernels will move out of the outlet of the threshing cavity 2 along with the moving frame 9 and the corn cob core. Through screening treatment, a small part of the corn kernels will enter the power cavity 3 through the channel 4 and can be collected by setting a discharge port at the bottom of the power cavity 3. Therefore, through the above method of threshing the corn cob, the damage to the corn kernels can be effectively reduced, the integrity of the corn kernels can be ensured, the threshing quality is higher, which is convenient for the subsequent storage and processing of the corn, and the axial threshing method is beneficial to the full separation of the corn kernels from the corn cob, reducing the grain residue and making the corn kernels fall off from the corn cob more completely, with a higher threshing rate.

[0023] See Figure 2 、 Figure 6 and Figure 7As shown in the figure, further, in order to ensure that the corn cobs can be fully separated by the threshing teeth 7 after reaching the position of the channel 4, reduce breakage, facilitate one-time threshing, and reduce the damage rate. A plurality of elastic pressing components 12 corresponding to the channel 4 one by one are further arranged on the side wall of the threshing cavity 2 opposite to the partition plate 29. The elastic pressing component 12 includes a wedge-shaped pressing block 121, a guiding column 122, a limiting plate 123, and a first spring 124. The wedge-shaped pressing block 121 is vertically arranged, and inclined surfaces are provided on both sides of the wedge-shaped pressing block 121 perpendicular to the moving direction of the moving frame 9. A limiting hole 125 is formed on the side wall of the threshing cavity 2. One end of the wedge-shaped pressing 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 pressing block 121 facing the channel 4; one end of the guiding column 122 is fixedly connected to the wedge-shaped pressing block 121, and the other end passes through the threshing cavity 2 from the limiting hole 125; as Figure 8 shown in the figure, the limiting plate 123 is fixedly connected to the end of the guiding column 122 passing through the threshing cavity 2; the first spring 124 is sleeved on the side wall of the guiding column 122 outside the threshing cavity 2, and one end of the first spring 124 is fixedly connected to the threshing cavity 2, and the other end is fixedly connected to the limiting plate 123.

[0024] During use, when the moving frame 9 moves, the partition between two adjacent material placing grooves in the moving frame 9 will squeeze the inclined surface of the wedge-shaped pressing block 121, causing the wedge-shaped pressing block 121 to contract into the limiting hole 125. When the moving frame 9 moves to the position where the material placing groove is opposite to the channel 4, at this time, the squeezed and contracted wedge-shaped pressing block 121 is separated from the partition. Under the action of the first spring 124, the wedge-shaped pressing block 121 will move into the material placing groove to push the corn cob in the direction of the channel 4, so as to ensure that the corn cob can fully abut against the threshing teeth 7 when they arrive, facilitating the full threshing of a corresponding row of corn kernels during the first contact, avoiding subsequent repeated threshing, and thus effectively reducing the damage rate of the corn kernels. Furthermore, by arranging the roller 126 at the position of the wedge-shaped pressing block 121 facing the channel 4, the transverse friction and extrusion of the wedge-shaped pressing block 121 on 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 the damage.

[0025] See Figure 1 and Figure 8As shown in the figure, further, in order to ensure the high-efficiency stability of the corn cob when it comes into contact with the threshing teeth 7 and reduce the damage to the corn kernels during the threshing process, a voltage stabilizing component 13 is also provided on the top of the box body 1. The voltage stabilizing component 13 includes an electric telescopic rod 131, a pushing block 132, a lifting plate 133 and a plurality of pushing rods 135. The electric telescopic rod 131 is vertically fixed on the top of the box body 1; the pushing block 132 is slidably connected in the limiting groove on the top of the box body 1, and the pushing block 132 is connected to the output end of the electric telescopic rod 131. An inclined surface is provided on the upper side of the pushing block 132; the lifting plate 133 is horizontally lapped on the inclined surface of the pushing block 132, and the lower side of the lifting plate 133 is fixedly connected to the top wall of the box body 1 through a second spring 134; a plurality of pushing rods 135 are vertically arranged. The upper end of the pushing rod 135 is fixedly connected to the lifting plate 133, and the lower end passes through the top wall of the box body 1 and enters the threshing cavity 2. The distance between adjacent two pushing rods 135 is equal to the distance between adjacent two material placing grooves.

[0026] During the threshing process, when the moving frame 9 drives the corn cob to move to the corresponding position, the electric telescopic rod 131 is immediately started to pull the pushing block 132, so that the lifting plate 133 moves from the upper end of the inclined surface of the pushing block 132 to the lower end of the inclined surface. At this time, under the reset action of the second spring 134, the lifting plate 133 pushes the pushing rod 135 to move downward, so that the lower end of the pushing rod 135 contacts the upper end of the corn cob, and limits the axial position of the corn cob. In order to adapt to corn cobs of different lengths, an elastic debugging structure can be further provided at the lower end of the pushing rod 135. Specifically, the elastic debugging structure includes a pushing plate. A column body is fixedly connected to the side of the pushing plate facing the pushing rod 135. The upper end of the column body is inserted into the pushing rod 135 coaxially, and an elastic member is arranged inside the column body and the pushing rod 135. The elastic member can also be a spring. Thus, it can further adapt to the use of corn cobs of different lengths, and has better applicability. Thus, the upper and lower ends of the corn cob are limited between the rotating plate 10 and the pushing plate. When the threshing teeth 7 contact the corn cob, the stability is higher, the threshing effect is better, and the breakage rate can be effectively reduced. When the moving frame 9 needs to move, at this time, the electric telescopic rod 131 is started to push the pushing block 132, so that the pushing block 132 lifts the lifting plate 133, realizing the separation of the pushing plate and the corn cob, and facilitating the continuous movement of the corn cob.

[0027] See Figure 9 and Figure 11As shown in the figure, 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. A placing groove 15 adapted to the rotating plate 10 is formed on the upper side of the inclined plate 14. The rotating plate 10 is embedded in the placing groove 15. A rotating seat 16 coaxial with the rotating plate 10 is rotatably connected in the placing groove 15. The rotating seat 16 is connected to the gear-rack group 11. A third spring 17 is provided between the rotating plate 10 and the rotating seat 16. In the static state of the third spring 17, the upper side of the rotating plate 10 is coplanar with the inclined surface on the upper side of the inclined plate 14. A plurality of positioning pins 18 are arranged on the side of the rotating seat 16 facing the rotating plate 10. The tip end of the positioning pin 18 penetrates and is inserted into the rotating plate 10, and the tip of the positioning pin 18 is lower than the notch of the placing groove 15. Preferably, the plurality of 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 diversion platform with the rotating plate 10 at the bottom of the feeding trough.

[0028] During the threshing process, when the corn cob is not affected by external forces, its own gravity will slightly squeeze the rotating plate 10 to achieve a small part of the tip of the positioning pin 18 to have an insertion effect with the corn cob, which does not affect the pushing of the corn cob by the wedge-shaped push block 121. It should be noted that after the positioning pins 18 are set, when the moving frame 9 enters the position of the first channel 4, first, the wedge-shaped push block 121 is used to adjust and limit the position of the corn cob and the channel 4, and then the push plate is adjusted to push the corn cob from the top. At this time, under the action of the push plate, the corn cob will increase the pressure on the rotating plate 10, and at this time the positioning pins 18 will also be more firmly inserted into the corn cob, improving the stability of the corn cob, ensuring the stability when the threshing teeth 7 contact the corn kernels, and reducing the breakage rate. After the first axial threshing is completed at the position of the first channel 4, the push plate returns to its original position, and the moving plate continues to move forward by 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 pins 18 into the corn cob, but will not separate. At this time, it can effectively ensure that the rotating plate 10 drives the corn to rotate when it rotates. When reaching the position of the next channel 4, the corresponding wedge-shaped push 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 the positions of the channels 4 in sequence, so as to ensure better stability of the corn cob during the entire threshing process, better threshing quality, and further reduce the breakage rate.

[0029] See Figure 5As shown, further, in order to enable the corn kernels to be better separated from the corn cob and reduce unnecessary secondary threshing, the threshing teeth 7 are composed of a straight tooth section 71 and an inclined tooth section 72. The cross-section of the straight tooth section 71 is trapezoidal, and the end with the larger base of the straight tooth section 71 is perpendicularly fixedly connected to the conveyor belt 6. The end with the smaller base of the straight tooth section 71 is connected to the inclined tooth section 72, and the included angle between the inclined tooth section 72 and the straight tooth section 71 is 0° - 60°. When the included angle between the inclined tooth section 72 and the straight tooth section 71 is 0°, the entire threshing tooth 7 is in a horizontal state at this time. When the included angle between the inclined tooth section 72 and the straight tooth section 71 changes between 0° and 60°, the front end of the threshing tooth 7 is more likely to insert into the root of the corn kernel, facilitating the threshing of the corn kernel, being able to strip a row of corn kernels acting on it at one time, stripping more thoroughly, avoiding subsequent secondary threshing of this row of corn kernels, reducing the number of threshing times, that is, correspondingly reducing the number of contacts between the corn kernels and the threshing teeth 7, effectively reducing the breakage rate of the separated corn kernels. In practical tests, when the included angle between the inclined tooth section 72 and the straight tooth section 71 is greater than 60°, the threshing teeth 7 are more likely to slip on the corn cob. Not only is the threshing insufficient, but also due to incomplete threshing at one time, the corn kernels will contact the threshing teeth 7 repeatedly subsequently, resulting in an increase in the breakage rate.

[0030] See Figure 1 and Figure 2 As shown, in order to ensure that the corn cob can be stably placed in each feeding groove of the moving frame 9 in an axial state and improve the processing efficiency. At one opening (entrance) of the threshing cavity 2, a feeding hopper 19 is provided. The feeding hopper 19 includes an upper cavity and a lower cavity. A dividing plate 20 is provided between the upper cavity and the lower cavity. A plurality of feeding holes 21 are opened on the dividing plate 20. The feeding holes 21 are linearly distributed along the moving direction of the moving frame 9, and the distances between adjacent two feeding holes 21 and adjacent two feeding grooves are equal. Preferably, the number of the feeding holes 21 is the same as that of the feeding grooves. Furthermore, the lower cavity is communicated with the threshing cavity 2 and the two form a continuous channel for the movement of the moving frame 9.

[0031] In use, when all the corn cobs in the moving frame 9 are completely threshed, the second driving part 8 is used to move the moving frame 9 to the lower cavity of the feed hopper 19. After the moving frame 9 completely enters the lower cavity, the corn cobs can be accurately placed in the material placing groove in the axial state through different feeding holes 21 in sequence, which is convenient and fast. Further, in order to improve the efficiency of placing the corn cobs into the moving frame 9, a baffle 26 that moves synchronously with the moving frame 9 can be fixedly connected to the side of the moving frame 9 facing the feed hopper. The baffle 26 is horizontally arranged and located below the feeding hole 21, and its end far away from the moving frame 9 passes through the side wall of the lower cavity far away from the box body 1. Thus, after the moving frame 9 enters the threshing cavity 2, other corn cobs can be pre-placed between the feeding hole 21 and the baffle 26, and then the pre-placed corn cobs can be smoothly put into each material placing groove in sequence during the process of the moving frame 9 entering the lower cavity, without waiting for the moving frame 9 to completely enter the lower cavity before putting them, which can effectively shorten the putting time and improve the processing efficiency.

[0032] See Figures 1 to 3 As shown, further, in order to enable the corn kernels on the corn cobs to be fully separated and reduce the breakage rate of the corn kernels. An aggregate box 22 is arranged at the bottom of the box body 1 of this device. The upper side of the aggregate box 22 is open, and a baffle cover 23 is arranged on the upper side of the opening of the aggregate box 22. The baffle cover 23 is located at the other opening of the threshing cavity 2, and the baffle cover is respectively communicated with the threshing cavity 2 and the aggregate box 22. A screening plate 24 is inclined in the aggregate cavity, and a flexible extrusion mechanism 25 is arranged on the upper side of the screening plate 24 for secondary threshing of the corn cobs entering the material cavity. The flexible extrusion mechanism 25 includes extrusion rollers 251, flexible extrusion strips 252 and guide plates 253. Specifically, there are two extrusion rollers 251, which are symmetrically arranged on both sides of the aggregate 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 core. A plurality of flexible extrusion strips 252 are circumferentially arranged on each extrusion roller 251. The flexible extrusion strips 252 are all made of rubber material, and the length of the flexible extrusion strips 252 is adapted to the length of the extrusion roller 251. The flexible extrusion strips 252 are all made of rubber material. The extrusion roller 251 is connected to the output end of the first driving part 5. There are also two guide plates 253, which are oppositely and obliquely arranged above the two extrusion rollers 251. The lower ends of the two guide plates 253 in the inclined direction are close to each other and are placed above the extrusion gap.

[0033] Specifically, the corncobs in the moving box 9 are threshed by the threshing teeth 7 in the threshing cavity 2. After threshing, the corn cobs are pushed to the upper side of the aggregate cavity by the second driving part 8. At this time, under the action of the mechanical vibration of the device itself and the third spring 17, the corn cobs on the rotating plate 10 will fall off the threshing positioning pins 18 and fall into the aggregate box 22 under the blocking of the blocking cover. At the same time, the separated corn kernels will also enter the aggregate box 22 through the inclined surfaces of the inclined plate 14 and the rotating plate 10. The corn kernels will directly pass through the screening plate 24 and be separated to the bottom of the aggregate box 22, while the corn cobs will first be limited by the two guide plates 253 and then be sequentially conveyed between the two pressing rollers 251. Through the rotation of the two pressing rollers 251, the flexible strips will further separate the corn kernels remaining on the corn cobs, so that the corn kernels are fully separated and cleaned. At the same time, the use of the flexible strips can effectively ensure the integrity of the corn kernels and reduce the breakage rate.

[0034] See Figure 2 and Figure 12 As shown in and, further, in order to realize the transmission of multiple transmission belts 6 and the subsequent rotation of the two pressing rollers 251, the first driving assembly includes a first motor 51, a first driving gear 52, a first driven gear 53, two belt pulleys 54, a belt 55, two rotating shafts 56, a plurality of sprockets 57 and a plurality of chains 58. The first motor 51 is fixedly connected to the outer side wall of the aggregate box 22, and its output shaft is coaxially fixedly connected to one of the pressing rollers 251. The first driving gear 52 is sleeved on the output shaft of the first motor 51 and meshes with the first driven gear 53. The first driven gear 53 is sleeved on the connecting shaft, and the connecting shaft is rotatably connected to the aggregate box 22 and one end thereof is coaxially fixed to the other pressing roller 251. Further, the two rotating shafts 56 are arranged parallel to each other up and down in the power cavity 3 and are rotatably connected to the side wall of the power cavity 3. One end of each of the two rotating shafts 56 close to the first motor 51 penetrates through the box body 1. One belt pulley 54 is sleeved on the end of one of the rotating shafts 56 penetrating through the box body 1 and the output shaft of the first motor 51 respectively, and the two belt pulleys 54 are connected by the belt 55. A plurality of sprockets 57 are sleeved on the two rotating shafts 56 in the power cavity 3 in one-to-one correspondence, and the corresponding two sprockets 57 are connected by the chain 58. The plurality of chains 58 correspond to the plurality of transmission belts 6 one by one, and each transmission belt 6 is fixedly wound around the corresponding chain 58. Thus, when in use, the first motor 51 starts and can drive the two pressing rollers 251 to rotate through the cooperation of the first driving gear 52 and the first driven gear 53. And under the cooperation of the two belt pulleys 54 and the belt 55, one of the rotating shafts 56 can be directly driven to rotate. And the two rotating shafts 56 can realize the movement of the multiple transmission belts 6 under the cooperation of the sprockets 57 and the chains 58.

[0035] See Figure 3 and Figure 12As shown, further, in order to facilitate the reciprocating movement of the moving frame 9 between the upper side of the aggregate box 22, the threshing chamber 2 and the feed hopper, the second driving part 8 includes a stepping motor 81, a sliding groove 82, a sliding plate 83 and a stud 84. The sliding groove 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 sliding groove 82 extend into the partition cover and the feed hopper 19 respectively. The sliding plate 83 is slidably connected to the sliding groove 82, and the sliding plate 83 is detachably connected to the moving frame 9. The stud 84 is rotatably connected to the sliding groove 82, and the sliding plate 83 is sleeved on the stud 84, and the sliding plate 83 is screwed to the stud 84. One end of the stud 84 passes through the feed hopper 19 and is connected to the stepping motor 81. During use, the stepping motor 81 can drive the stud 84 to rotate intermittently at a set time interval. When the stud 84 rotates, the sliding plate 83 can be moved in the sliding groove 82 through the threaded structure with the sliding plate 83, and intermittent movement is realized along with the intermittent rotation of the stud 84, so that the moving frame 9 drives the corn cobs to move intermittently in the threshing chamber 2 and cooperate with the threshing teeth 7 at each channel 4 position to realize threshing.

[0036] See Figure 3 and Figure 9 As shown, further, in order to make the power part be arranged between the sliding plate 83 and the moving frame 9, the gear-rack group 11 includes a plurality of spur gears 111 and racks 112. The plurality of spur gears 111 correspond to the plurality of rotating plates 10 one by one. The spur gears 111 are fixedly connected to the corresponding rotating seats 16 through transmission shafts, that is, indirectly connected to the rotating plates 10. The racks 112 are fixedly connected to the side walls of the threshing chamber 2, and the racks 112 are meshed with the plurality of spur gears 111. Thus, when the moving frame 9 moves, the spur gears 111 will drive the transmission shafts to rotate through meshing with the racks 112, the transmission shafts drive the rotating seats 16 to rotate, and the rotating seats 16 rotate under the action of the third springs 17 and the positioning pins 18, so as to facilitate the rotation of the rotating plates 10 and the threshing cooperation with the threshing teeth 7 at different positions.

[0037] See Figure 1 and Figure 2 As shown, in order to improve the threshing efficiency of the device, at least two partition plates 29 are further arranged in the box body 1, so as to form at least two threshing chambers 2 and a power chamber 3. The power chamber 3 is arranged between the two threshing chambers 2. Feeding assemblies with the same structure are arranged in both threshing chambers 2. Through the transmission of the transmission belt 6 in the power chamber 3, the threshing teeth 7 on the transmission belt 6 can sequentially pass through the channels 4 on the two partition plates 29 and act on the corn cobs in the two threshing chambers 2. And in order to save energy and cost, such as Figure 11As shown, the second driving part 8 in the two feeding components can share a stepping motor 81. When using one stepping motor 81, it is necessary to add a second driving gear 27 and a second driven gear 28 with meshing settings, and then the second driving gear 27 and the second driven gear 28 are respectively sleeved and fixed on two studs 84. And when setting two groups of feeding components, two groups of voltage stabilizing components 13 are also designed accordingly. In order to save costs, as Figure 7 shown, the two groups of voltage stabilizing components 13 share an electric telescopic rod 131. Specifically, the electric telescopic rod 131 is vertically fixed on the top of the box body. At the telescopic end of the electric telescopic rod 131, two connecting rods 136 are hinged. One end of the two connecting rods 136 away from the electric telescopic rod 131 is respectively hinged to a corresponding pushing block 132. Thus, the lifting of the electric telescopic rod 131 can realize the reciprocating movement of the two pushing blocks 132, which is convenient for the pressing rod 135 to stabilize the corn cob.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A threshing device for corn crops, characterized in that: include: A threshing chamber (2), wherein a plurality of vertical channels (4) are provided on the side wall of the threshing chamber (2); A plurality of transmission belts (6) are located outside the threshing chamber (2) and correspond one to one with the plurality of channels (4); each of the transmission belts (6) is provided with a threshing tooth (7); when the threshing tooth (7) is transmitted to one side of the threshing chamber (2), it passes through the corresponding channel (4) and enters the threshing chamber (2); A feeding assembly, comprising a moving frame (9), a rotating plate (10) and a gear rack set (11), wherein the moving frame (9) is movably arranged in the threshing chamber (2), and the moving frame (9) comprises a plurality of rectangular material placement troughs, wherein the material placement troughs are used to realize axial placement of corn, and the bottom of each material placement trough 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 rack set (11), so as to realize rotation of the rotating plate (10) during the movement of the moving frame (9); When the moving frame (9) drives the corn cob to move to the corresponding channel (4) position, the threshing teeth (7) enter the threshing chamber (2) from one end of the channel (4) through the transmission of the transmission belt (6). 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 kernels 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), so as to thresh a row of corn kernels on the corn cob facing the channel (4).

2. A threshing device for corn crops according to claim 1, characterized in that: A plurality of elastic pushing components (12) corresponding one to one with the channels (4) are also arranged on the side wall of the threshing chamber (2) opposite to the channel (4), and the elastic pushing components (12) include: A wedge-shaped pushing block (121), one end of which is away from the partition plate (29) is inserted into a limiting hole (125) reserved on the side wall of the threshing chamber (2), and both sides of the wedge-shaped pushing block (121) perpendicular to the moving direction of the moving frame (9) are provided with inclined surfaces, and a side of the wedge-shaped pushing block (121) facing the channel (4) is rotatably connected to a roller (126); An elastic reset member is arranged outside the threshing chamber (2) and connected to the wedge-shaped pushing block (121), and is used to realize the telescopic movement of the wedge-shaped pushing block (121) in the limiting hole (125).

3. A threshing device for corn crops according to claim 1, characterized in that: A voltage stabilizing component (13) is also provided on the top of the threshing chamber (2), and the voltage stabilizing component (13) comprises: An electric telescopic rod (131) vertically fixed on the top outer side of the threshing chamber (2); A push block (132) is slidably connected to the top wall of the threshing chamber (2), and the push block (132) is connected to the telescopic end of the electric telescopic rod (131), and an inclined surface is provided on the upper side of the push block (132); A lifting plate (133) is transversely 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 threshing chamber (2) via a second spring (134); A plurality of push rods (135) are vertically arranged, wherein the upper ends of the push rods (135) are fixedly connected to the lifting plate (133), and the lower ends thereof pass through the top wall of the threshing chamber (2) and enter the threshing chamber (2), and the distance between two adjacent push rods (135) is equal to the distance between two adjacent material placing troughs.

4. A threshing device for corn crops according to claim 1, characterized in that: The bottom of the material placing trough is provided with an inclined plate (14), the upper side surface of the inclined plate (14) is provided with a placement groove (15), 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), and a third spring (17) is provided between the rotating plate (10) and the rotating seat (16), a plurality of positioning needles (18) are arranged on the side of the rotating seat (16) facing the rotating plate (10), one end of the needle tip of the positioning needle (18) is inserted through the rotating plate (10), and the needle tip of the positioning needle (18) is lower than the notch of the placement groove (15).

5. A threshing device for corn crops according to claim 1, characterized in that: The threshing teeth (7) are composed of a straight tooth segment (71) and an oblique tooth segment (72); the cross section of the straight tooth segment (71) is a trapezoid; the end with a larger bottom edge of the straight tooth segment (71) is vertically fixedly connected to the transmission belt (6); the end with a smaller bottom edge of the straight tooth segment (71) is connected to the oblique tooth segment (72); and the angle between the oblique tooth segment (72) and the straight tooth segment (71) is 0°-60°.

6. A threshing device for corn crops according to claim 1, characterized in that: A feed hopper (19) is provided at one of the openings of the threshing chamber (2), the feed hopper (19) comprising an upper cavity and a lower cavity, a dividing plate (20) is provided between the upper cavity and the lower cavity, a plurality of feeding holes (21) are provided on the dividing plate (20), the plurality of feeding holes (21) are linearly distributed along the moving direction of the moving frame (9), and the spacing 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.

7. A threshing device for corn crops according to claim 6, characterized in that: A material collection box (22) is arranged at the bottom of the threshing chamber (2), the upper side of the material collection box (22) is open, and a baffle cover (23) is arranged on the upper side of the opening of the material collection box (22), the baffle cover (23) is located on the other opening side of the threshing chamber (2), and the baffle cover is connected to the threshing chamber (2) and the material collection box (22) respectively, and a sieve plate (24) is arranged obliquely in the material collection chamber, and a flexible squeezing mechanism (25) is arranged on the upper side of the sieve plate (24) for secondary threshing of corn cobs entering the material collection chamber.

8. A threshing device for corn crops according to claim 7, characterized in that: The flexible extrusion mechanism (25) comprises: Two squeezing rollers (251) are symmetrically arranged on both sides of the aggregate box (22), the two squeezing rollers (251) rotate towards each other, and an squeezing gap is reserved between them, and each squeezing roller (251) has a plurality of flexible squeezing strips (252) in a circumferential array, and the length of the flexible squeezing strips (252) is adapted to the length of the squeezing roller (251); The two guide plates (253) are arranged oppositely and obliquely on the upper sides of the two extrusion rollers (251); the lower ends of the two guide plates (253) in the oblique direction are close to each other and are placed above the extrusion gap.

9. A threshing device for corn crops according to claim 8, characterized in that: The flexible extrusion strip (252) and the threshing teeth (7) are both made of rubber.

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