White kidney bean threshing device

Abstract

The invention relates to the technical field of threshing devices, and discloses a white kidney bean threshing device which comprises a rack, a box body, a threshing mechanism and a screening mechanism, the box body is installed on the rack, the threshing mechanism is rotatably installed in the box body, and the screening mechanism matched with the threshing mechanism is arranged below the threshing mechanism. The threshing rod is arranged to be of the integrally-formed arch-shaped structure, the first connecting part, the bent part and the second connecting part form the rigidly-fixed arc-shaped protruding structure, and a blade or a V-shaped separating rod which is prone to damaging beans in the prior art is replaced. Meanwhile, the first connecting part obliquely extends towards the front of the rotating direction of the roller, and the second connecting part obliquely extends towards the rear of the rotating direction, so that the contact between the threshing rods and white kidney bean pods and beans is flexible attaching type threshing instead of rigid cutting or impacting. The structural design can accurately act on the connection position of bean pods to achieve threshing, and direct extrusion or scratching of beans is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of threshing equipment technology, and in particular to a threshing device for white kidney beans. Background Technology

[0002] Kidney beans are cultivated varieties belonging to the genus *Vigna* in the legume family, originating in Central America. The plants grow in a climbing or erect manner, producing pods 10-20 cm long, with mature seeds that are kidney-shaped or oval. In my country, they are mainly cultivated in high-altitude regions such as Yunnan and Guizhou, and are an important economic crop.

[0003] To ensure the long-term storage of kidney beans, they are usually dried in the sun to reduce their internal moisture content, thus achieving effective storage. In addition, kidney beans are stored in their pods, and the pods are shelled and shelled before sale. This effectively prevents the beans from cracking and wrinkling, and improves the quality of the pods.

[0004] Traditionally, kidney beans are threshed using a lever to beat dried crop stalks, then the stalks and bean husks are removed. The remaining beans are then winnowed to remove impurities before being stored. This method is not only inefficient and labor-intensive, but also results in a very high breakage rate of the collected beans. While existing kidney bean threshing devices have significantly improved efficiency and reduced labor intensity through mechanization, the high breakage rate remains a problem.

[0005] For example, CN221962317A discloses "A bean threshing and straw crushing device". The separating drum in this device replaces the traditional rectangular blades with V-shaped separating rods as described in this application, so that when peeling beans, the sharpness of the blades can be avoided to prevent damage to the beans, thus improving the protection of the beans.

[0006] However, in actual threshing operations, it was found that while the improved V-shaped separating rod mitigated the mechanical impact during threshing to some extent, the structural improvement alone was insufficient to completely prevent damage to the kidney bean seeds caused by severe collisions, compression, and repeated friction. The protective effect of the threshing device on the seeds remained unstable, with the breakage rate fluctuating.

[0007] The goal of consistently reducing the damage rate of kidney bean seeds during threshing has always been pursued by those skilled in the art. Summary of the Invention

[0008] To solve or partially solve the problems existing in the related technologies, this application provides a white kidney bean threshing device to solve the problems mentioned in the background technology.

[0009] A white kidney bean threshing device according to this application includes a frame, a housing, a threshing mechanism and a screening mechanism. The housing is mounted on the frame, the threshing mechanism is rotatably mounted in the housing, and a screening mechanism is provided below the threshing mechanism to cooperate with it. The threshing mechanism includes a drum body, a cutting and crushing plate, a threshing component, and a feeding plate. One end of the drum body is provided with a first circular partition, and the other end of the drum body is provided with a second circular partition. The drum body, the first circular partition, and the second circular partition are arranged coaxially, and the diameter of the first circular partition is the same as the diameter of the drum body, while the diameter of the second circular partition is larger than the diameter of the drum body. At least three rows of granulating components are arranged in a ring along the axial direction of the drum body. Each row of granulating components consists of three granulating rods arranged at equal intervals along the circumference of the drum body. The pelletizing rod is a one-piece molded part, including a first connecting part, a bent part and a second connecting part connected in sequence, wherein the length of the first connecting part is longer than that of the second connecting part; The starting end of the first connecting part and the end of the second connecting part are respectively fixed to the surface of the roller body. The curved part is an arc-shaped protrusion connecting the first connecting part and the second connecting part. The first connecting part, the second connecting part and the curved part together form a rigid and fixed arch structure for contacting and peeling off crops. The first connecting part extends obliquely forward in the direction of rotation of the roller body from its fixed point; the second connecting part extends obliquely backward in the direction of rotation of the roller body from its fixed point, so that the oblique directions of the first connecting part and the second connecting part are opposite. The screening mechanism includes an arc-shaped separating screen, which is fixedly installed inside the box and located below the threshing mechanism; the separating screen has an arc-shaped straw outlet on the side away from the threshing mechanism, and the threshing mechanism pushes the cut, crushed and stripped straw out from the arc-shaped straw outlet.

[0010] As a preferred technical solution, the screening mechanism includes a pair of main arc-shaped rods arranged in parallel on the left and right sides, and a short arc-shaped rod with the same curvature as the main arc-shaped rods but shorter in length. The short arc-shaped rod is arranged parallel to and adjacent to one of the main arc-shaped rods. Several horizontal connecting rods are fixedly connected between the main arc-shaped rods; among them, the length of some horizontal connecting rods located on the side of the arc-shaped short rod is correspondingly shortened, and one end of the connecting rod is connected to the main arc-shaped rod, and the other end is connected to the arc-shaped short rod; the gap area between the arc-shaped short rod and the adjacent main arc-shaped rod constitutes the arc-shaped straw outlet.

[0011] Multiple rows of parallel iron wires are threaded between each horizontal connecting rod to form an arc-shaped screen surface; each iron wire is fitted with a clearance fit with each horizontal connecting rod it passes through; the two ends of the iron wire are bent and abut against the horizontal connecting rods located at the upper and lower ends of the screen respectively.

[0012] As a preferred technical solution, the spacing between the wires is not uniform, but gradually decreases from the side away from the arc-shaped straw outlet to the side towards the arc-shaped straw outlet.

[0013] As a preferred technical solution, a fixed frame is installed on the top of the frame away from the threshing mechanism, and a drive motor is installed on the top of the fixed frame. The output shaft of the drive motor is connected to a synchronous pulley one via a coupling. A transmission rod is installed on the side of the second circular partition away from the drum body, and a synchronous pulley two is sleeved on the outer edge of the transmission rod. The synchronous pulley two, the transmission rod, and the second circular partition are arranged coaxially. A synchronous belt one is movably sleeved on the outer edge of the synchronous pulley two, and the inner wall of the end of the synchronous belt one away from the synchronous pulley two is movably sleeved with the outer edge of the synchronous pulley one.

[0014] As a preferred technical solution, a pulley 1 is movably sleeved on the outer edge of the transmission rod, a sleeve is installed on the side of the frame, a rotating rod is rotatably sleeved on the inner wall of the sleeve, a pulley 2 is installed on the side of the rotating rod, a transmission belt is movably sleeved on the outer edge of the pulley 2, and the inner wall of the transmission belt at the end away from the pulley 2 is movably sleeved with the outer edge of the pulley 1, an eccentric wheel is installed at the end of the rotating rod away from the pulley 2, a transmission component is rotatably sleeved on the eccentric shaft of the eccentric wheel, a connecting plate is rotatably connected at the end of the transmission component away from the eccentric wheel, a vibrating suspension screen is installed on the side of the connecting plate, the vibrating suspension screen has a coarse screen opening and a fine screen opening, connecting rods are rotatably connected to both sides of the inner wall of the vibrating suspension screen, and the sides of the two connecting rods near the top are rotatably connected to the two sides of the inner wall of the box.

[0015] As a preferred technical solution, the box body is provided with a discharge plate, and a feeding frame is installed on the side of the discharge plate. The feeding frame and the discharge plate are integrally formed, and the inner wall of the discharge plate is connected to the outside of the box body through the inner wall of the feeding frame.

[0016] As a preferred technical solution, a third synchronous wheel is provided on the side of the first synchronous wheel, the third synchronous wheel is sleeved with the output shaft of the drive motor, a blower is installed at the bottom of the housing, a blower blade is rotatably sleeved on the inner wall of the blower, a fourth synchronous wheel is installed on the side of the blower blade, and a second synchronous belt is movably sleeved on the outer edge of the fourth synchronous wheel, and the inner wall of the second synchronous belt is movably sleeved with the outer edge of the third synchronous wheel.

[0017] As a preferred technical solution, the top of the box is provided with a top cover, the side of the top cover is provided with a feed port, the side of the frame near the top is provided with a protective shell one, and the side of the frame near the bottom is provided with a protective shell two.

[0018] Compared with the prior art, this application has the following advantages: 1. This white kidney bean threshing device innovatively designs the core peeling component of the threshing mechanism. The peeling rod is designed as a one-piece, arched structure, consisting of a first connecting part, a curved part, and a second connecting part forming a rigid, fixed arc-shaped protrusion. This replaces the blades or V-shaped separating rods in existing technologies that easily damage the beans. Simultaneously, the first connecting part extends forward in the direction of drum rotation, and the second connecting part extends backward in the direction of rotation, ensuring a flexible, close-fitting peeling action between the peeling rod and the white kidney bean pods and beans, rather than rigid cutting or impact. This structural design allows for precise application at the pod connection point for threshing, effectively avoiding direct compression or scratching of the beans. It fundamentally solves the technical pain points of high bean breakage rates and large fluctuations in breakage rates in existing threshing devices, ensuring the integrity of the threshed white kidney bean seeds and enhancing the product's commercial value.

[0019] 2. In this white kidney bean threshing device, the wires on the screening mechanism are not rigidly welded, but have slight room for movement within the holes of the horizontal connecting rods. This "gap fit" between the wires and the horizontal connecting rods reduces breakage. Specifically, under the vibration generated by the machine's operation, each wire produces independent micro-amplitude elastic vibration. For broad beans that occasionally get stuck at the edge of the screen holes, the slight movement of the wires provides a "springy" effect, helping them fall smoothly and preventing them from being broken by shearing forces after being rigidly stuck. At the same time, the elastic contact also buffers the instantaneous impact when the material falls.

[0020] Furthermore, the wire mesh with gradually decreasing spacing, where the wire spacing decreases from the side away from the outlet to the side facing the outlet, creates a transition from a "coarse screening zone" to a "fine screening zone." This design reduces breakage primarily through: Rapid initial screening: At the inlet end (coarse screening zone), the larger spacing allows the vast majority of broad beans and fine impurities to quickly pass through the screen holes and fall out of the main working area. This achieves "rapid escape" of the broad beans, greatly reducing the time they remain in the high-risk area below the threshing drum.

[0021] Gradual separation: The coarse screening zone mainly traps long straws. These straws move towards the outlet (fine screening zone) as the screen vibrates and tilts. During this movement, the smaller spacing of the fine screening zone further separates any small amount of broad beans or larger pod fragments that were not caught in the straw, ensuring thorough separation of the beans.

[0022] Guiding rather than obstructing: The entire design aims to allow "what should go down (broad beans) to go down as quickly as possible" and "what should go out (straw) to go out smoothly", avoiding material blockage and accumulation in a certain place on the screen surface, thereby eliminating the squeezing and damage caused by accumulation.

[0023] 3. The white kidney bean threshing device has at least three rows of threshing components arranged around the axis of the drum body, with three threshing rods in each row arranged at equal intervals along the circumference, forming a multi-directional and fully covered threshing surface, so that the bean pods can fully contact the threshing components as the drum rotates, achieving efficient threshing. On the other hand, the transmission structure of the drive motor, synchronous pulley, synchronous belt and transmission rod enables the threshing mechanism to operate stably and efficiently. Compared with the traditional manual threshing method, the efficiency is significantly improved, and manpower is completely freed up, greatly reducing the labor intensity of operators. In addition, the cutting and crushing plate and the feeding plate in the threshing mechanism work together to pre-treat the crop straw and accurately push the threshed straw to the arc-shaped straw outlet, avoiding the accumulation of straw and affecting the continuity of threshing, and further ensuring the threshing efficiency.

[0024] 4. This white kidney bean threshing device constructs a multi-stage separation system through the coordinated design of the screening mechanism and the vibrating suspension screen. The threshed mixture is first screened by an arc-shaped separation screen to initially separate the beans from larger straw and bean shells. Subsequently, through the linkage of components such as the transmission rod, pulley, and eccentric wheel, the vibrating suspension screen is driven to reciprocate, and the beans and fine impurities are separated by coarse and fine screen openings to ensure high purity of the finally collected beans. At the same time, the setting of the blower and blower blades can further remove light impurities on the surface of the beans by air force, further improving the screening effect and reducing the subsequent manual cleaning process.

[0025] 5. This white kidney bean threshing device features a stable frame for support, and each transmission component is equipped with a protective shell to effectively prevent interference from foreign objects during transmission, thus improving operational safety. The design of the top cover and feed inlet facilitates crop feeding, while the integrated structure of the discharge plate and feeding frame allows for convenient collection of threshed beans. The overall operation process is simple and easy to understand, requiring no professional skills. Furthermore, the threshing and screening structure of this device can be adapted to the characteristics of different white kidney bean varieties, making it suitable not only for white kidney bean threshing but also for threshing similar-sized legumes, thus broadening the device's applicability and enhancing its economic value. 6. This white kidney bean threshing device uses a single drive motor to simultaneously drive the threshing mechanism, vibrating screen, and blower. Utilizing the synergistic transmission of synchronous belts and drive belts, it achieves synchronized operation of multiple mechanisms, avoiding energy waste and transmission asynchrony issues caused by multiple motor drives. The scientifically designed transmission structure minimizes power transmission loss, effectively reducing equipment energy consumption while ensuring efficient operation of each mechanism, thus meeting the energy-saving and environmentally friendly industrial development requirements. Attached Figure Description

[0026] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the protective shell structure of the present invention; Figure 4 This is a schematic diagram of the pulley structure of the present invention; Figure 5 This is a schematic diagram of the threshing mechanism of the present invention; Figure 6 This is a schematic diagram of the screening mechanism of the present invention; Figure 7 This is a cross-sectional view of the threshing mechanism of the present invention; Figure 8 This is a schematic diagram of the vibrating suspension screen structure of the present invention; Figure 9 This is a schematic diagram of the synchronous wheel structure of the present invention.

[0028] In the diagram: 1. Frame; 2. Housing; 3. Threshing mechanism; 4. Screening mechanism; 5. Fixed frame; 6. Drive motor; 7. Synchronous pulley one; 8. Synchronous belt one; 9. Synchronous pulley two; 10. Transmission rod; 11. Synchronous pulley three; 12. Synchronous belt two; 13. Synchronous pulley four; 14. Blower; 15. Blower blade section; 16. Belt pulley two; 17. Belt pulley one; 18. Transmission belt; 19. Rotating rod; 20. Eccentric wheel; 21. Transmission component; 22. Connecting plate; 23. Vibrating suspension screen; 24. Fine screen opening; 25. Coarse screen opening; 26. Connecting rod; 27. Discharge plate; 28. Discharge frame; 29. ​​Top cover; 30. Feed inlet; 31. Protective shell one; 32. Protective shell two; 33. Sleeve; 301. Drum body; 302. Cutting and crushing plate; 303. Feeding plate; 304. First circular partition; 305. Second circular partition; 306. Pelletizing rod; 3061, First connecting part; 3062, Bending part; 3063, Second connecting part; 401. Separating screen; 402. Arc-shaped straw outlet; 403. Main arc-shaped rod; 404. Arc-shaped short rod; 405. Horizontal connecting rod; 406. Iron wire. Detailed Implementation

[0029] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0030] Please see Figures 1-9 A white kidney bean threshing device includes a frame 1, a box 2, a threshing mechanism 3 and a screening mechanism 4. The box 2 is mounted on the frame 1, the threshing mechanism 3 is rotatably mounted in the box 2, and the screening mechanism 4 is provided below the threshing mechanism 3 to cooperate with it. The frame 1, as the supporting foundation of the entire device, is welded from high-strength steel to ensure the structural stability of the device during operation and to prevent displacement or deformation due to vibration. The box 2 prevents the splashing of soybean grains and straw fragments during threshing, ensuring a clean operating environment and personnel safety, and provides a stable installation space for core mechanisms such as threshing and screening. The threshing mechanism 3 and the screening mechanism 4 are arranged in an upper and lower corresponding layout, so that the threshed mixture can fall directly into the screening mechanism 4, reducing the spillage loss during material transmission and improving the continuity of material processing. The threshing mechanism 3 includes a drum body 301, a cutting and crushing plate 302, a threshing component, and a feeding plate 303. One end of the drum body 301 is provided with a first circular partition 304, and the other end of the drum body 301 is provided with a second circular partition 305. The drum body 301, the first circular partition 304, and the second circular partition 305 are arranged coaxially, and the diameter of the first circular partition 304 is the same as the diameter of the drum body 301, while the diameter of the second circular partition 305 is larger than the diameter of the drum body 301. The drum body 301 adopts a hollow cylindrical structure, which reduces the overall weight and driving load while ensuring structural rigidity. The cutting and crushing plate 302 can gently cut and initially crush the crop straw entering the box 2 during rotation, avoiding straw entanglement and affecting the threshing process. The first circular partition 304 is designed with the same diameter as the drum body 301, which can limit the material at one end of the drum body 301 and prevent the material from overflowing from the end. The second circular partition 305 has a larger diameter than the roller body 301 and can form a sealed fit with the inner wall of the box 2. It not only limits the material, but also provides stable installation support for the transmission rod 10, ensuring the coaxiality of the transmission process. At least three rows of granulating components are arranged in a ring along the axial direction of the drum body 301. Each row of granulating components consists of three granulating rods 306 arranged at equal intervals along the circumference of the drum body 301. The multi-row, multi-set threshing component layout design allows the threshing rods 306 to contact the crop from different directions and angles during the rotation of the drum body 301, achieving all-round threshing without dead angles and significantly improving the uniformity and thoroughness of threshing. The three equally spaced threshing rods 306 in each row create a stable material contact area between adjacent rods, preventing some material from remaining unthreshed due to excessive spacing, or material from being crushed and damaged due to insufficient spacing, thus ensuring a balance between threshing efficiency and grain protection. The pelletizing rod 306 is an integrally molded part, including a first connecting part 3061, a bent part 3062 and a second connecting part 3063 connected in sequence, wherein the length of the first connecting part 3061 is longer than that of the second connecting part 3063. The threshing rod 306 is made with a one-piece molding process, without splicing gaps, which improves the overall structural strength and stability and avoids threshing failure or bean damage caused by loosening of splicing points during long-term use. The design of the first connecting part 3061 being longer than the second connecting part 3063 makes the protrusion direction and position of the curved part 3062 more in line with the threshing force requirements of white kidney bean pods. During rotation, the material can be guided into the threshing area first through the longer first connecting part 3061, and then the curved part 3062 can achieve precise threshing. Finally, the shorter second connecting part 3063 guides the threshed straw to the feeding plate 303, forming a smooth material processing flow. The starting end of the first connecting part 3061 and the end of the second connecting part 3063 are respectively fixed to the surface of the roller body 301. The curved part 3062 is an arc-shaped protrusion connecting the first connecting part 3061 and the second connecting part 3063. The first connecting part 3061, the second connecting part 3063 and the curved part 3062 together form a rigid and fixed arched structure for contacting and peeling the crop. The first connecting part 3061 and the second connecting part 3063 are fixed to the surface of the roller body 301 by welding or bolt fastening, ensuring a firm and reliable connection and preventing them from falling off due to centrifugal force or material impact during rotation. The arc-shaped protruding curved part 3062 adopts a smooth curved surface design, replacing the traditional sharp blades or rigid rods. When in contact with the pods, the extrusion force generated by the curved surface achieves the separation of the pods and beans, avoiding direct cutting or impact on the beans and significantly reducing the breakage rate of the beans. The rigidly fixed arched structure not only ensures the strength of the force during the peeling process and can effectively peel off stubbornly attached pods, but also has a certain degree of elastic deformation capability, which can adapt to pods of different sizes and improve the applicability of the device. The first connecting part 3061 extends obliquely forward in the direction of rotation of the roller body 301 from its fixed point; the second connecting part 3063 extends obliquely backward in the direction of rotation of the roller body 301 from its fixed point, so that the oblique directions of the first connecting part 3061 and the second connecting part 3063 are opposite. The opposite tilt design gives the threshing rod 306 a unique integrated structure of "guiding-threshing-discharging". The first connecting part 3061 tilts forward in the direction of rotation, which can actively guide the material in front to the threshing working area of ​​the curved part 3062 when the drum rotates, improving the contact efficiency between the material and the threshing part. The second connecting part 3063 tilts backward in the direction of rotation, which can smoothly push the straw after the bean kernels are removed to the rear feeding plate 303 after threshing, avoiding the accumulation of material in the threshing area. This design not only improves the threshing efficiency, but also reduces the residence time of the material in the device and reduces the risk of the bean kernels being repeatedly squeezed and damaged. The screening mechanism 4 includes an arc-shaped separating screen 401, which is fixedly installed inside the box 2 and located below the threshing mechanism 3. An arc-shaped straw outlet 402 is provided on the side of the separating screen 401 away from the threshing mechanism 3, and the threshing mechanism 3 pushes the cut, crushed and stripped straw out from the arc-shaped straw outlet 402.

[0031] In a preferred embodiment, the screening mechanism 4 includes a pair of main arc-shaped rods 403 arranged in parallel on the left and right sides, and an arc-shaped short rod 404 with the same arc as the main arc-shaped rods but shorter in length. The arc-shaped short rod 404 is arranged parallel to and adjacent to one of the main arc-shaped rods 403. Several horizontal connecting rods 405 are fixedly connected between the main arc-shaped rods 403; among them, the length of some horizontal connecting rods 405 located on the side of the arc-shaped short rod 404 is correspondingly shortened, and one end of them is connected to the main arc-shaped rod 403, and the other end is connected to the arc-shaped short rod 404; the gap area between the arc-shaped short rod 404 and the adjacent main arc-shaped rod 403 constitutes the arc-shaped straw outlet 402.

[0032] Multiple rows of parallel-arranged iron wires 406 are threaded between the horizontal connecting rods 405, forming an arc-shaped screen surface. Each iron wire 406 has a clearance fit with each horizontal connecting rod 405 it passes through. The two ends of each iron wire 406 are bent and abut against the horizontal connecting rods 405 located at the upper and lower ends of the screen. The iron wires 406 are not rigidly welded, but have slight room for movement within the holes of the horizontal connecting rods. This helps reduce breakage: specifically, under the vibration generated by the machine, each iron wire can produce independent micro-amplitude elastic vibration. This vibration effectively prevents the screen holes from being blocked by damp bean pods or fine straw, maintaining screening efficiency. Furthermore, for broad beans that occasionally get stuck at the edge of the screen holes, the slight movement of the iron wire provides a "springy" effect, helping them fall smoothly and avoiding breakage due to shearing force after being rigidly stuck. Simultaneously, the elastic contact also buffers the instantaneous impact when the material falls. In a more preferred embodiment, the spacing between the wires 406 is not uniform, but gradually decreases from the side away from the arc-shaped straw outlet 402 towards the arc-shaped straw outlet 402. The gradual decrease in wire spacing from the side away from the outlet to the side towards the outlet forms a transition from a "coarse screening zone" to a "fine screening zone".

[0033] It can further reduce damage: Rapid initial screening: At the inlet end (coarse screening zone), the larger spacing allows the vast majority of broad beans and fine impurities to quickly pass through the screen holes and fall out of the main working area. This achieves "rapid escape" of the broad beans, greatly reducing the time they remain in the high-risk area below the threshing drum.

[0034] Gradual separation: The coarse screening zone mainly traps long straws. These straws move towards the outlet (fine screening zone) as the screen vibrates and tilts. During this movement, the smaller spacing of the fine screening zone further separates any small amount of broad beans or larger pod fragments that were not caught in the straw, ensuring thorough separation of the beans.

[0035] Guiding rather than obstructing: The entire design aims to allow "what should go down (broad beans) to go down as quickly as possible" and "what should go out (straw) to go out smoothly", avoiding material blockage and accumulation in a certain place on the screen surface, thereby eliminating the squeezing and damage caused by accumulation.

[0036] In a preferred embodiment, a fixed frame 5 is installed on the top of the side of the frame 1 away from the threshing mechanism 3, and a drive motor 6 is installed on the top of the fixed frame 5. The output shaft of the drive motor 6 is connected to a synchronous pulley 7 via a coupling. A transmission rod 10 is installed on the side of the second circular partition 305 away from the drum body 301, and a synchronous pulley 9 is sleeved on the outer edge of the transmission rod 10. The synchronous pulley 9, the transmission rod 10, and the second circular partition 305 are arranged coaxially. A synchronous belt 8 is movably sleeved on the outer edge of the synchronous pulley 9, and the inner wall of the end of the synchronous belt 8 away from the synchronous pulley 9 is movably sleeved with the outer edge of the synchronous pulley 7. The mounting bracket 5 adopts a detachable installation structure, which facilitates the installation, maintenance, and replacement of the drive motor 6. Its bottom is fixedly connected to the frame 1 by reinforcing ribs, which improves the stability of the drive motor 6 installation and reduces the vibration of the drive motor 6 during operation. The coupling can compensate for the installation deviation between the output shaft of the drive motor 6 and the synchronous pulley 7, ensuring the smoothness of power transmission. The synchronous transmission mechanism composed of synchronous pulley 7, synchronous belt 8, and synchronous pulley 9 has the advantages of precise transmission ratio and low power loss, which enables the power of the drive motor 6 to be efficiently transmitted to the transmission rod 10, thereby driving the drum body 301 to rotate at a uniform speed. The coaxial arrangement of synchronous pulley 9, transmission rod 10, and second circular partition 305 ensures that no eccentric vibration will occur during transmission, thus improving the stability of the threshing mechanism 3.

[0037] In a preferred embodiment, a pulley 17 is movably sleeved on the outer edge of the transmission rod 10, a sleeve 33 is installed on the side of the frame 1, a rotating rod 19 is rotatably sleeved on the inner wall of the sleeve 33, a pulley 16 is installed on the side of the rotating rod 19, a transmission belt 18 is movably sleeved on the outer edge of the pulley 16, and the inner wall of the end of the transmission belt 18 away from the pulley 16 is movably sleeved with the outer edge of the pulley 17, an eccentric wheel 20 is installed on the end of the rotating rod 19 away from the pulley 16, a transmission component 21 is rotatably sleeved on the eccentric shaft of the eccentric wheel 20, a connecting plate 22 is rotatably connected to the end of the transmission component 21 away from the eccentric wheel 20, a vibrating screen 23 is installed on the side of the connecting plate 22, the vibrating screen 23 is provided with a coarse screen 25 and a fine screen 24, and connecting rods 26 are rotatably connected to both sides of the inner wall of the vibrating screen 23, and the sides of the two connecting rods 26 near the top are rotatably connected to the sides of the inner wall of the box 2 respectively. The transmission structure consisting of pulley 17, transmission belt 18, and pulley 16 can smoothly transmit the power of transmission rod 10 to rotating rod 19. Sleeve 33 provides stable rotational support for rotating rod 19, reducing radial runout during operation. The cooperation between eccentric wheel 20 and transmission component 21 converts the rotational motion of rotating rod 19 into reciprocating linear motion of connecting plate 22, thereby driving vibrating screen 23 to reciprocate. The setting of connecting rod 26 makes the vibration trajectory of vibrating screen 23 more stable and avoids screen deviation during vibration. The coarse screen 25 and fine screen 24 in vibrating screen 23 adopt a graded screening design. The coarse screen 25 first intercepts larger impurities, and the fine screen 24 then finely screens the beans, further improving the purity of the beans. The graded screening design also reduces the screening pressure of a single screen, improving screening efficiency and screen life.

[0038] In a preferred embodiment, the housing 2 is provided with a discharge plate 27, and a feeding frame 28 is installed on the side of the discharge plate 27. The feeding frame 28 and the discharge plate 27 are integrally formed. The inner wall of the discharge plate 27 is connected to the outside of the housing 2 through the inner wall of the feeding frame 28. The discharge plate 27 adopts an inclined design with an optimized inclination angle to ensure that the screened pure soybeans can smoothly slide into the discharge frame 28 under gravity, preventing soybeans from accumulating on the discharge plate 27. The discharge frame 28 and the discharge plate 27 are integrally formed without splicing gaps, which not only improves structural strength but also prevents soybeans from remaining or getting stuck at the splicing points. The outlet of the discharge frame 28 can be connected to a collection bag or conveying pipe as needed to achieve centralized collection and subsequent transfer of soybeans, improving operational convenience; at the same time, the inner wall of the discharge frame 28 is treated with a smooth and wear-resistant material to reduce frictional damage during the soybeans' fall. In a preferred embodiment, a third synchronous pulley 11 is provided on the side of the first synchronous pulley 7. The third synchronous pulley 11 is sleeved with the output shaft of the drive motor 6. A blower 14 is installed at the bottom of the housing 2. A blower blade part 15 is rotatably sleeved on the inner wall of the blower 14. A fourth synchronous pulley 13 is installed on the side of the blower blade part 15. A second synchronous belt 12 is movably sleeved on the outer edge of the fourth synchronous pulley 13. The inner wall of the second synchronous belt 12 is movably sleeved with the outer edge of the third synchronous pulley 11. Synchronous pulley 3 11 and synchronous pulley 1 7 are coaxially connected to the output shaft of drive motor 6, realizing synchronous drive of threshing mechanism 3 and blower 14 by a single motor; the synchronous transmission structure composed of synchronous pulley 3 11, synchronous belt 2 12 and synchronous pulley 4 13 ensures that the blower blades 15 of blower 14 can operate in coordination with threshing mechanism 3 and vibrating screen 23. Blower 14 is installed at the bottom of housing 2, and its air delivery direction is towards the screening area, which can generate a stable airflow to blow away light impurities (such as bean shell fragments and dust) generated during screening, further improving the purity of bean grains; at the same time, the airflow can also accelerate the falling speed of bean grains on screen and discharge plate 27, improving overall processing efficiency.

[0039] In a preferred embodiment, the top of the housing 2 is provided with a top cover 29, the side of the top cover 29 is provided with a feed inlet 30, the side of the frame 1 near the top is provided with a protective shell 31, and the side of the frame 1 near the bottom is provided with a protective shell 32. The top cover 29 can be fixed to the top of the box 2 with screws, which facilitates the operator to inspect, clean and maintain the threshing mechanism 3 and screening mechanism 4 inside the box 2. The feed inlet 30 is equipped with an inclined guide plate, which can guide the white kidney bean crop to be threshed smoothly into the threshing area inside the box 2 and prevent the crop from clogging the feed inlet 30. The protective shell 1 31 is used to wrap the top transmission components such as the synchronous pulley 1 7, the synchronous belt 1 8, and the synchronous pulley 2 9. The protective shell 2 32 is used to wrap the bottom transmission components such as the pulley 1 17, the transmission belt 18, and the pulley 2 16. This can prevent external debris from entering the transmission mechanism and affecting the transmission effect, and also prevent the operator from contacting the rotating parts and causing a safety accident, thereby improving the safety and service life of the device.

[0040] Working principle: 1. Feeding Start: Start the drive motor 6. The output shaft of the drive motor 6 synchronously drives the coaxially sleeved synchronous wheel 7 and synchronous wheel 11 to rotate, realizing the power split output. Then the operator puts the white kidney bean pod crop to be threshed into the box 2 through the feed port 30 on the side of the top cover 29. II. Threshing Transmission and Operation: Synchronous wheel 7 drives synchronous wheel 9 to rotate via synchronous belt 8. Since synchronous wheel 9, transmission rod 10 and second circular partition 305 are arranged coaxially, transmission rod 10 rotates synchronously and drives drum body 301 to rotate. During the rotation of drum body 301, cutting and crushing plate 302 on it first gently cuts and initially crushes the crop straw entering box 2 to avoid straw entanglement. At the same time, multiple rows and sets of threshing rods 306 rotate with drum body 301. The first connecting part 3061 extends forward in the direction of rotation and actively guides the crop to the threshing area of ​​arc-shaped curved part 3062. Through the arc-shaped curved surface of the arch structure, the beans are pressed against the pods to achieve separation of beans and pods. After separation, the second connecting part 3063 extends backward in the direction of rotation and pushes the threshed straw to the feeding plate 303. Finally, the feeding plate 303 discharges the straw from the arc-shaped straw outlet 402 into box 2. III. Screening and Grading: While the transmission rod 10 rotates, the pulley 17 sleeved on its outer edge drives the pulley 16 to rotate through the transmission belt 18, which in turn drives the rotating rod 19 to rotate stably in the sleeve 33. The eccentric wheel 20 at the end of the rotating rod 19 rotates accordingly. The rotational motion is converted into the reciprocating linear motion of the connecting plate 22 through the transmission component 21. The connecting plate 22 drives the vibrating screen 23 to vibrate back and forth. The connecting rod 26 ensures that the vibration trajectory of the vibrating screen 23 is stable. The mixture of threshed beans and impurities falls into the separation screen 401 below. The beans fall through the screen holes to the vibrating screen 23. After being finely screened through the coarse screen 25 and the fine screen 24, pure beans are obtained. During the screening process, the drive motor 6 drives the synchronous pulley 13 to rotate through the synchronous pulley 11 and the synchronous belt 12, which causes the blower blades 15 of the blower 14 to rotate and generate airflow. The airflow blows away the light impurities in the beans, further improving the purity of the beans. IV. Discharge and Collection: After grading, screening and impurity removal, the pure soybeans slide down the inclined discharge plate 27 under the action of gravity to the discharge frame 28, and are finally discharged from the box 2 through the discharge frame 28, realizing the centralized collection of soybeans.

[0041] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A white kidney bean threshing device, comprising a frame (1), a housing (2), a threshing mechanism (3) and a screening mechanism (4), wherein the housing (2) is mounted on the frame (1), the threshing mechanism (3) is rotatably mounted in the housing (2), and a screening mechanism (4) is provided below the threshing mechanism (3) to cooperate with it. The threshing mechanism (3) includes a drum body (301), a cutting and crushing plate (302), a threshing component, and a feeding plate (303). One end of the drum body (301) is provided with a first circular partition (304), and the other end of the drum body (301) is provided with a second circular partition (305). The drum body (301), the first circular partition (304), and the second circular partition (305) are arranged coaxially, and the diameter of the first circular partition (304) is the same as the diameter of the drum body (301), and the diameter of the second circular partition (305) is larger than the diameter of the drum body (301). Its features are: At least three rows of granulating components are arranged in a ring along the axial direction of the drum body (301), and each row of granulating components consists of three granulating rods (306) arranged at equal intervals along the circumference of the drum body (301); The pelletizing rod (306) is an integrally molded part, including a first connecting part (3061), a bent part (3062) and a second connecting part (3063) connected in sequence, wherein the length of the first connecting part (3061) is longer than that of the second connecting part (3063). The starting end of the first connecting part (3061) and the end of the second connecting part (3063) are respectively fixed to the surface of the roller body (301). The curved part (3062) is an arc-shaped protrusion connecting the first connecting part (3061) and the second connecting part (3063). The first connecting part (3061), the second connecting part (3063) and the curved part (3062) together form a rigid and fixed arched structure for contacting and peeling off crops. The first connecting part (3061) extends obliquely forward in the direction of rotation of the roller body (301) from its fixed point; the second connecting part (3063) extends obliquely backward in the direction of rotation of the roller body (301) from its fixed point, so that the oblique directions of the first connecting part (3061) and the second connecting part (3063) are opposite. The screening mechanism (4) includes an arc-shaped separating screen (401), which is fixedly installed inside the box (2) and located below the threshing mechanism (3). An arc-shaped straw outlet (402) is provided on the side of the separating screen (401) away from the threshing mechanism (3), and the threshing mechanism (3) pushes the cut, crushed and stripped straw out from the arc-shaped straw outlet (402).

2. The white kidney bean threshing device according to claim 1, characterized in that: The screening mechanism (4) includes a pair of main arc rods (403) arranged in parallel on the left and right sides and an arc rod (404) with the same arc as the main arc rods but shorter in length. The arc rod (404) is arranged parallel to and adjacent to one of the main arc rods (403). Several horizontal connecting rods (405) are fixedly connected between the main arc-shaped rods (403); among them, the length of some horizontal connecting rods (405) located on the side of the arc-shaped short rod (404) is correspondingly shortened, and one end of them is connected to the main arc-shaped rod (403), while the other end is connected to the arc-shaped short rod (404); the gap area between the arc-shaped short rod (404) and the adjacent main arc-shaped rod (403) constitutes the arc-shaped straw outlet (402). Between each horizontal connecting rod (405), multiple rows of parallel iron wires (406) are threaded to form an arc-shaped screen surface; each iron wire (406) is fitted with a clearance fit with each horizontal connecting rod (405) it passes through; the two ends of the iron wire (406) are bent and respectively abut against the horizontal connecting rods (405) located at the upper and lower ends of the screen.

3. The white kidney bean threshing device according to claim 2, characterized in that: The spacing between the wires (406) is not equal, but starts from the side away from the arc-shaped straw outlet (402) and gradually decreases towards the arc-shaped straw outlet (402).

4. The white kidney bean threshing device according to claim 2 or 3, characterized in that: A fixed frame (5) is installed on the top of the frame (1) away from the threshing mechanism (3), and a drive motor (6) is installed on the top of the fixed frame (5). The output shaft of the drive motor (6) is connected to a synchronous wheel (7) through a coupling. A transmission rod (10) is installed on the side of the second circular partition (305) away from the drum body (301), and a synchronous wheel (9) is connected to the outer edge of the transmission rod (10). The synchronous wheel (9), the transmission rod (10) and the second circular partition (305) are arranged coaxially. A synchronous belt (8) is movably connected to the outer edge of the synchronous wheel (9), and the inner wall of the synchronous belt (8) away from the synchronous wheel (9) is movably connected to the outer edge of the synchronous wheel (7).

5. The white kidney bean threshing device according to claim 4, characterized in that: A pulley 1 (17) is movably sleeved on the outer edge of the transmission rod (10). A sleeve (33) is installed on the side of the frame (1). A rotating rod (19) is rotatably sleeved on the inner wall of the sleeve (33). A pulley 2 (16) is installed on the side of the rotating rod (19). A transmission belt (18) is movably sleeved on the outer edge of the pulley 2 (16). The inner wall of the transmission belt (18) at the end away from the pulley 2 (16) is movably sleeved with the outer edge of the pulley 1 (17). An offset is installed at the end of the rotating rod (19) away from the pulley 2 (16). The eccentric wheel (20) has a transmission component (21) rotatably connected to its eccentric shaft. The end of the transmission component (21) away from the eccentric wheel (20) is rotatably connected to a connecting plate (22). A vibrating suspension screen (23) is installed on the side of the connecting plate (22). The vibrating suspension screen (23) is provided with a coarse screen opening (25) and a fine screen opening (24). Both sides of the inner wall of the vibrating suspension screen (23) are rotatably connected to connecting rods (26), and the sides of the two connecting rods (26) near the top are rotatably connected to the sides of the inner wall of the box (2).

6. The white kidney bean threshing device according to claim 2 or 3, characterized in that: The box (2) is provided with a discharge plate (27), and a feeding frame (28) is installed on the side of the discharge plate (27). The feeding frame (28) and the discharge plate (27) are integrally formed. The inner wall of the discharge plate (27) is connected to the outside of the box (2) through the inner wall of the feeding frame (28).

7. The white kidney bean threshing device according to claim 4, characterized in that: Synchronous wheel three (11) is provided on the side of the first synchronous wheel (7). The third synchronous wheel (11) is sleeved with the output shaft of the drive motor (6). A blower (14) is installed at the bottom of the housing (2). A blower blade (15) is rotatably sleeved on the inner wall of the blower (14). A fourth synchronous wheel (13) is installed on the side of the blower blade (15). A second synchronous belt (12) is movably sleeved on the outer edge of the fourth synchronous wheel (13). The inner wall of the second synchronous belt (12) is movably sleeved with the outer edge of the third synchronous wheel (11).

8. The white kidney bean threshing device according to claim 2 or 3, characterized in that: The top of the box (2) is provided with a top cover (29), the side of the top cover (29) is provided with a feed inlet (30), the side of the frame (1) near the top is provided with a protective shell one (31), and the side of the frame (1) near the bottom is provided with a protective shell two (32).

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