A device for removing empty rice grains

Abstract

This invention belongs to the field of agricultural machinery technology, and particularly relates to a device for removing empty rice grains. The device includes: a shell, detachably connected to a rice harvester via several lugs, with a funnel fixedly connected to the top of the shell; an adjustable feeding assembly, fixedly disposed inside the shell, with its feed end corresponding to the bottom end of the funnel; a debris removal assembly, fixedly disposed inside the shell, located below the discharge end of the adjustable feeding assembly, used to evenly distribute the rice grains entering the shell so that they fall uniformly onto the debris removal assembly, which in turn removes impurities from the rice grains; and a screening assembly, fixedly disposed inside the shell, located below the debris removal assembly, used to remove empty rice grains. This invention enables the harvester to remove empty rice grains during the rice harvesting process.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and in particular relates to a device for removing empty rice grains. Background Technology

[0002] Currently, existing combine harvesters can efficiently complete the main operations of rice harvesting and threshing, significantly improving the mechanization level and work efficiency of agricultural production. However, in actual operation, a common and unresolved technical bottleneck is that the rice processed by the combine harvester still contains a large number of empty husks and light impurities.

[0003] These empty rice husks are not only lightweight and vary in proportion, but their physical properties are also similar to those of full rice grains, making complete separation during mechanical harvesting extremely difficult. Existing harvesters mainly rely on a combination of wind screening and vibrating sieving for initial cleaning. However, due to the complex operating environment, inconsistent rice maturity, and limited precision in adjusting mechanical parameters, it is often difficult to achieve efficient and high-purity separation of rice grains from empty husks. This results in a high impurity rate in the harvested rice, increasing the burden on subsequent drying, storage, and processing, and potentially affecting the overall quality and market value of the rice.

[0004] Therefore, current harvesters still have certain functional limitations and have not yet achieved the effective separation of rice grains from empty husks while harvesting.

[0005] Therefore, a device for removing empty rice grains needs to be designed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a device for removing empty rice grains, enabling harvesters to remove empty rice grains during the harvesting process.

[0007] To achieve the above objectives, the present invention provides the following solution: an apparatus for removing empty rice grains, comprising:

[0008] The outer shell is detachably connected to the rice harvester via several lugs, and a funnel is fixedly connected to the top of the outer shell.

[0009] An adjustable feeding assembly is fixedly installed inside the outer shell, with the feed end of the adjustable feeding assembly corresponding to the bottom end of the funnel;

[0010] The impurity removal component is fixedly installed inside the outer shell. The impurity removal component is located below the discharge end of the adjustable uniform feeding component. The adjustable uniform feeding component is used to uniformly feed the rice entering the outer shell so that the rice falls evenly onto the impurity removal component. The impurity removal component is used to remove impurities in the rice.

[0011] A screening component is fixedly installed inside the housing, located below the impurity removal component, and is used to remove empty rice grains.

[0012] According to the present invention, an apparatus for removing empty rice grains includes an adjustable feeding assembly comprising a first motor, the first motor being fixedly connected to the inner wall of the outer casing, a first lead screw being coaxially fixedly connected to one end of the output end of the first motor, the first lead screw being horizontally positioned, the other end of the first lead screw being rotatably connected to the inner wall of the outer casing, a slide block being threadedly connected to the outer side of the first lead screw, a guide rod being fixedly connected to the inner wall of the outer casing, the guide rod being parallel to the first lead screw and located on the same horizontal plane, another slide block being slidably sleeved on the outer side of the guide rod, side plates being fixedly connected to the side walls of the two slide blocks that are close to each other, an opening adjustment part being provided inside the slide block, an adjustable feeding part being rotatably connected between the two opening adjustment parts, the top end of the adjustable feeding part being fixedly connected to the top wall of the inner casing and located at the bottom end of the funnel, and the side wall of the adjustable feeding part slidingly contacting the side wall of the side plate.

[0013] According to the present invention, an apparatus for removing empty rice grains includes an opening adjustment section comprising a groove formed in the side wall of the slide block, a sliding hole formed in the top wall of the groove, two connecting blocks slidably disposed in the groove, an adjusting rod fixedly connected to the top of the connecting blocks, two second fixing seats fixedly connected to the top of the slide block, the two second fixing seats being respectively located at both ends of the sliding hole, a bidirectional lead screw rotatably disposed between the two second fixing seats, the threads at both ends of the bidirectional lead screw having opposite directions, the bidirectional lead screw being threadedly connected to the two adjusting rods, the two adjusting rods being respectively located at both ends of the bidirectional lead screw, and both connecting blocks being rotatably connected to the adjustable feeding section.

[0014] According to the present invention, an apparatus for removing empty rice grains includes an adjustable feeding section comprising two swing plates. The tops of both ends of the swing plates are respectively fixedly connected to a first connecting shaft. A first fixed seat is rotatably sleeved on the outer side of the first connecting shaft. The first fixed seat is fixedly connected to the inner top wall of the outer shell. The two swing plates are respectively located on both sides of the bottom end of the funnel. A sliding plate is slidably connected inside the bottom end of the swing plate. A rotating shaft is fixedly connected to both ends of the bottom end of the sliding plate. The rotating shaft is rotatably connected to the connecting block. A gap is left between the bottom ends of the two sliding plates.

[0015] According to the present invention, a device for removing empty rice grains is provided in which the sidewalls of the two swing plates that are far apart from each other are respectively provided with a plurality of limiting grooves, and the sidewalls of the two sliding plates that are far apart from each other are respectively fixedly connected with a plurality of limiting strips, wherein the limiting strips correspond one-to-one with the limiting grooves and are slidably connected.

[0016] According to the present invention, an apparatus for removing empty rice grains includes a second motor, which is fixedly connected to the inner wall of the outer casing. The output shaft of the second motor is fixedly connected to one corner of a vibrating screen, which is located below the discharge end of an adjustable feeding assembly. The other three corners of the vibrating screen are slidably connected to sliding rods, which are fixedly connected to the inner wall of the outer casing. The vibrating screen is inclined and its high end is close to the second motor. The two side walls at the low end of the vibrating screen are respectively provided with notches. An impurity removal part is provided on the side wall of the outer casing, and the impurity removal part corresponds to the notches.

[0017] According to the present invention, an apparatus for removing empty rice grains includes a cleaning fan and a discharge port. The cleaning fan is fixedly installed on one side wall of the outer shell and corresponds to a notch, and the discharge port is opened on the other side wall of the outer shell and corresponds to another notch.

[0018] According to the present invention, an apparatus for removing empty rice grains includes a screening component comprising a third motor fixedly connected to the inner wall of the outer casing. One end of a drive roller is coaxially fixedly connected to the output shaft of the third motor, and the other end of the drive roller is rotatably connected to the inner wall of the outer casing. A driven roller is also rotatably connected to the inner wall of the outer casing. The driven roller is parallel to the drive roller and located on the same horizontal plane. A conveyor belt is wound around the outer sides of the drive roller and the driven roller, and the conveyor belt is located below the impurity removal component. A material feeding component is provided above the discharge end of the conveyor belt. Several screening fans are fixedly connected to the side wall of the outer casing, and the screening fans are located below the discharge end of the conveyor belt.

[0019] According to the present invention, a device for removing empty rice grains includes a feeding assembly comprising two telescopic rods, which are respectively fixedly connected to two opposite inner sidewalls of the outer casing. The telescopic rods are vertically arranged. A fourth motor is fixedly connected to the bottom end of one telescopic rod, and a fixed sliding sleeve is fixedly connected to the bottom end of the other telescopic rod. One end of the feeding rod is coaxially fixedly connected to the output shaft of the fourth motor, and the other end of the feeding rod is slidably connected to the fixed sliding sleeve. A feeding plate is fixedly connected to the bottom end of the feeding rod, and the feeding plate is located above the conveyor belt.

[0020] According to the present invention, an apparatus for removing empty rice grains comprises a guide plate fixedly connected to one end of each of the two opposite inner sidewalls of the outer shell, the other end of the guide plate slidingly contacting the side of the conveyor belt, a separator fixedly connected to the bottom of the inner shell, the separator having a triangular cross-section with the apex pointing upwards, a gap being left between the apex of the triangle and the discharge end of the conveyor belt, a first discharge hole being formed between the end of the separator near the discharge end of the conveyor belt and the bottom of the outer shell, and a second discharge hole being formed between the other end of the separator and the bottom of the outer shell.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] This invention, through its rationally designed support structure, allows for easy and secure installation of the entire device onto a harvester, and also enables quick disassembly for regular maintenance or upkeep, significantly improving the maintainability and operational flexibility of the equipment. The funnel, located at the device's inlet, effectively receives the rice material discharged from the harvester and smoothly guides it into the device, preparing it for subsequent processing.

[0023] The device is equipped with an adjustable material leveling component, which can flexibly adjust the spreading speed and width according to the actual material flow and state, ensuring that the rice is evenly and flatly distributed on the working surface of the impurity removal component, avoiding a decrease in impurity removal effect due to material accumulation or uneven thickness, and improving the overall processing efficiency and quality.

[0024] As one of the core functional units, the impurity removal component can efficiently filter out light impurities such as straw and weeds mixed in during rice harvesting, ensuring the initial cleanliness of the rice material. After impurity removal, the rice will fall into the screening component, which uses vibration screening or air separation to effectively separate empty and shriveled grains from plump grains, ultimately outputting high-quality rice.

[0025] The machine has a compact structure and smooth functional integration. While improving the efficiency of post-harvest processing of rice, it also takes into account the ease of operation and maintenance, and has good practicality and promotion value. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0027] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0028] Figure 2 This is a schematic diagram of the appearance of the present invention after the funnel has been removed;

[0029] Figure 3 This is a schematic diagram of the adjustable material distribution component of the present invention;

[0030] Figure 4 This is a schematic diagram showing the connection between the swing plate and the sliding plate of the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the slide block of the present invention;

[0032] Figure 6 This is a schematic diagram of the impurity removal component and the screening component of the present invention;

[0033] Figure 7 This is a schematic diagram of the bottom of the present invention.

[0034] The components are as follows: 1. Outer shell; 2. Funnel; 3. Support lug; 4. Impurity discharge port; 5. Screening fan; 6. Connecting hole; 7. Impurity removal fan; 8. Swing plate; 9. First connecting shaft; 10. First fixed seat; 11. Slide plate; 12. First motor; 13. First lead screw; 14. Guide rod; 15. Slide block; 16. Side plate; 17. Strip hole; 18. Rotating shaft; 19. Limiting groove; 20. Limiting strip; 21. Second fixed seat; 22. Bidirectional lead screw. 23. Slide groove; 24. Slide hole; 25. Connecting block; 26. Adjusting rod; 27. Second motor; 28. Vibrating screen; 29. ​​Connecting plate; 30. Slide rod; 31. Third motor; 32. Driven roller; 33. Driven roller; 34. Conveyor belt; 35. Guide plate; 36. Telescopic rod; 37. Fourth motor; 38. Feeding rod; 39. Fixed sliding sleeve; 40. Feeding plate; 41. Separating seat; 42. First discharge hole; 43. Second discharge hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1 to 7 As shown, the present invention provides an apparatus for removing empty rice grains, comprising:

[0038] The outer shell 1 is detachably connected to the rice harvester via several lugs 3. A funnel 2 is fixedly connected to the top of the outer shell 1, and a connecting hole 6 is opened at the top of the outer shell 1. The funnel 2 is connected to the inside of the outer shell 1 through the connecting hole 6.

[0039] An adjustable feeding assembly is fixedly installed inside the outer casing 1, with the feed end of the adjustable feeding assembly corresponding to the bottom end of the funnel 2;

[0040] The impurity removal component is fixedly installed inside the outer shell 1. The impurity removal component is located below the discharge end of the adjustable uniform feeding component. The adjustable uniform feeding component is used to uniformly feed the rice entering the outer shell 1 so that the rice falls evenly onto the impurity removal component. The impurity removal component is used to remove impurities from the rice.

[0041] The screening component is fixedly installed inside the outer casing 1. The screening component is located below the impurity removal component and is used to remove empty rice grains.

[0042] Furthermore, the adjustable material leveling assembly includes a first motor 12, which is fixedly connected to the inner wall of the outer casing 1. One end of a first lead screw 13 is coaxially fixedly connected to the output end of the first motor 12. The first lead screw 13 is horizontally positioned, and the other end of the first lead screw 13 is rotatably connected to the inner wall of the outer casing 1. A slide block 15 is threadedly connected to the outer side of the first lead screw 13. A guide rod 14 is fixedly connected to the inner wall of the outer casing 1. The guide rod 14 is parallel to the first lead screw 13 and located on the same horizontal plane. Another slide block 15 is slidably sleeved on the outer side of the guide rod 14. Side plates 16 are fixedly connected to the side walls of the two slide blocks 15 that are close to each other. An opening adjustment part is provided inside the slide block 15. An adjustable material leveling part is rotatably connected between the two opening adjustment parts. The top end of the adjustable material leveling part is fixedly connected to the inner top wall of the outer casing 1 and located at the bottom end of the funnel 2. The side wall of the adjustable material leveling part is in sliding contact with the side wall of the side plate 16.

[0043] The first motor 12 is a forward and reverse motor, which can drive the first lead screw 13 to rotate in the forward or reverse direction, realize the reciprocating movement of the slide 15 on the first lead screw 13, and thus drive the reciprocating swing of the discharge port of the adjustable uniform material section.

[0044] Furthermore, the opening adjustment part includes a slide groove 23 formed in the side wall of the slide block 15. The top wall of the slide groove 23 has a slide hole 24. Two connecting blocks 25 are slidably arranged in the slide groove 23. An adjusting rod 26 is fixedly connected to the top of the connecting block 25. Two second fixing seats 21 are fixedly connected to the top of the slide block 15. The two second fixing seats 21 are respectively located at both ends of the slide hole 24. A bidirectional lead screw 22 is rotatably arranged between the two second fixing seats 21. The threads at both ends of the bidirectional lead screw 22 have opposite directions. The bidirectional lead screw 22 is threadedly connected to the two adjusting rods 26. The two adjusting rods 26 are respectively located at both ends of the bidirectional lead screw 22. Both connecting blocks 25 are rotatably connected to the adjustable material leveling part.

[0045] Furthermore, the adjustable material leveling section includes two swing plates 8. The top of each end of the swing plates 8 is fixedly connected to a first connecting shaft 9. A first fixed seat 10 is rotatably sleeved on the outside of the first connecting shaft 9. The first fixed seat 10 is fixedly connected to the inner top wall of the outer shell 1. The two swing plates 8 are located on both sides of the bottom end of the funnel 2. A slide plate 11 is slidably connected inside the bottom end of the swing plates 8. A rotating shaft 18 is fixedly connected to each end of the bottom end of the slide plate 11. The rotating shaft 18 is rotatably connected to the connecting block 25. A gap is left between the bottom ends of the two slide plates 11.

[0046] Rotating the bidirectional lead screw 22 in the same direction can adjust the distance between the two connecting blocks 25, thereby adjusting the distance between the bottom ends of the two sliding plates 11. This changes the thickness of the rice when it falls onto the cleaning component and also adjusts the falling speed of the rice.

[0047] A strip hole 17 is provided on the side plate 16 so that the rotating shaft 18 can pass through and be rotatably connected to the connecting block 25.

[0048] Furthermore, the two swing plates 8 are provided with a number of limiting grooves 19 on their sidewalls that are far apart from each other, and the two sliding plates 11 are fixedly connected with a number of limiting strips 20 on their sidewalls that are far apart from each other. The limiting strips 20 correspond one-to-one with the limiting grooves 19 and are slidably connected.

[0049] The limiting strip 20 and the limiting groove 19 serve to position the slide plate 11, ensuring that the slide plate 11 can slide stably within the swing plate 8.

[0050] The distance that the slide plate 11 slides out or slides in within the swing plate 8 corresponds to the distance that the slide block 15 reciprocates on the first lead screw 13, ensuring that the swing degree of the gap between the bottom ends of the two slide plates 11 is maximized.

[0051] Furthermore, the impurity removal component includes a second motor 27, which is fixedly connected to the inner wall of the outer casing 1. The output shaft of the second motor 27 is fixedly connected to one corner of the vibrating screen 28, which is located below the discharge end of the adjustable material leveling component. The other three corners of the vibrating screen 28 are slidably connected to slide rods 30, which are fixedly connected to the inner wall of the outer casing 1. The vibrating screen 28 is inclined and its high end is close to the second motor 27. The two side walls at the low end of the vibrating screen 28 are respectively provided with notches. The impurity removal part is provided on the side wall of the outer casing 1, and the impurity removal part corresponds to the notch.

[0052] The second motor 27 is a reciprocating linear motor, which can drive the vibrating screen 28 to vibrate at high frequency, thereby causing the rice to fall through the screen holes, while the straw and weeds are filtered and remain on the vibrating screen 28. At the same time, due to the inclined setting of the vibrating screen 28, as it vibrates continuously, the filtered straw and weeds will gradually move towards the lower end of the vibrating screen 28 and will eventually be discharged from the device after being processed by the impurity removal section.

[0053] The four corners of the vibrating screen 28 are fixedly connected with connecting plates 29, which are connected to the output shaft of the second motor 27 and the slide bar 30 through the connecting plates 29.

[0054] Furthermore, the impurity removal section includes an impurity removal fan 7 and an impurity discharge port 4. The impurity removal fan 7 is fixedly installed on one side wall of the outer casing 1 and corresponds to the notch. The impurity discharge port 4 is opened on the other side wall of the outer casing 1 and corresponds to another notch.

[0055] Furthermore, the screening assembly includes a third motor 31, which is fixedly connected to the inner wall of the outer casing 1. The output shaft of the third motor 31 is coaxially fixedly connected to one end of the drive roller 32, and the other end of the drive roller 32 is rotatably connected to the inner side of the outer casing 1. A driven roller 33 is also rotatably connected to the inner wall of the outer casing 1. The driven roller 33 is parallel to the drive roller 32 and located on the same horizontal plane. The drive roller 32 and the driven roller 33 are driven together by a conveyor belt 34. The conveyor belt 34 is located below the impurity removal assembly. A material feeding assembly is provided above the discharge end of the conveyor belt 34. Several screening fans 5 are fixedly connected to the side wall of the outer casing 1. The screening fans 5 are located below the discharge end of the conveyor belt 34.

[0056] Furthermore, the feeding assembly includes two telescopic rods 36, which are fixedly connected to two opposite inner sidewalls of the housing 1. The telescopic rods 36 are vertically arranged. A fourth motor 37 is fixedly connected to the bottom end of one telescopic rod 36, and a fixed sliding sleeve 39 is fixedly connected to the bottom end of the other telescopic rod 36. One end of the feeding rod 38 is coaxially fixedly connected to the output shaft of the fourth motor 37. The other end of the feeding rod 38 is slidably connected to the fixed sliding sleeve 39. A feeding plate 40 is fixedly connected to the bottom end of the feeding rod 38, and the feeding plate 40 is located above the conveyor belt 34.

[0057] The fourth motor 37 is a linear reciprocating motor, which can drive the material-pulling rod 38 and the material-pulling plate 40 to move back and forth, spreading the rice on the conveyor belt 34 to ensure the screening effect of the screening fan 5. The telescopic rod 36 can adjust the distance between the bottom of the material-pulling plate 40 and the conveyor belt 34 to adjust the thickness of the rice spreading.

[0058] Furthermore, guide plates 35 are fixedly connected to one end of the two opposite inner sidewalls of the outer casing 1, and the other end of the guide plates 35 slides in contact with the side of the conveyor belt 34. A separation seat 41 is fixedly connected to the bottom of the inner side of the outer casing 1. The cross-section of the separation seat 41 is triangular with the tip pointing upward. A gap is left between the tip of the triangle and the discharge end of the conveyor belt 34. A first discharge hole 42 is formed between the end of the separation seat 41 near the discharge end of the conveyor belt 34 and the bottom of the outer casing 1. A second discharge hole 43 is formed between the other end of the separation seat 41 and the bottom of the outer casing 1.

[0059] The first discharge hole 42 is used to discharge plump rice grains, while the second discharge hole 43 discharges empty rice grains.

[0060] The specific working process of this invention is as follows:

[0061] The rice mixture harvested by the combine harvester (including full grains, empty grains, broken ears, chopped straw, weeds, etc.) first enters the interior of the device casing 1 through the funnel 2 at the top.

[0062] The material then falls onto the adjustable material leveling assembly. The core of this assembly consists of two oscillating plates 8 and a sliding plate 11, initially aligned to form a "V"-shaped guide groove. Its operation is as follows: Power Start: The first motor 12 (forward and reverse motor) starts, driving the first lead screw 13 to rotate reciprocally in both directions. Reciprocating Motion: The slide block 15, threadedly connected to the first lead screw 13, begins horizontal reciprocating linear motion under the constraint of the lead screw and guide rod 14. Oscillating Material Leveling: The movement of the slide block 15 is transmitted to the oscillating plate 8, which slides against it, via the side plate 16. Since the top of the oscillating plate 8 is hinged to the top wall of the outer casing via the first fixed seat 10 and the first connecting shaft 9, and the bottom is in a free state, the horizontal thrust is converted into reciprocating oscillation at the bottom of the oscillating plate 8. The two oscillating plates 8 oscillate alternately, causing the discharge port between their bottom ends (i.e., the gap between the two sliding plates 11) to swing left and right like a "swinging mouth." Adjusting the Discharge Port: The opening adjustment section is used to adjust the size of the discharge port according to the material flow rate and characteristics. By rotating the bidirectional lead screw 22, the two connecting blocks 25 can be moved closer or further apart synchronously within the sliding groove 23. The connecting blocks 25, via the rotating shaft 18, drive the sliding plate 11 to slide and extend within the swing plate 8 (the limiting strip 20 and limiting groove 19 ensure stable sliding), thereby increasing or decreasing the gap between the bottom ends of the two sliding plates 11. A smaller gap limits the flow rate and prevents overloading of subsequent equipment; a larger gap improves processing efficiency. Uniform material distribution: Through swinging and opening adjustment, the rice mixture is evenly and dispersedly spread onto the vibrating screen 28 in the next stage, preventing material accumulation and laying a solid foundation for efficient impurity removal.

[0063] The evenly distributed rice mixture falls onto the inclined vibrating screen 28, and the impurity removal components begin to work. Vibration screening: The second motor 27 (reciprocating linear motor) starts, driving the vibrating screen 28 to perform high-frequency, small-amplitude reciprocating vibration. Plump and empty rice grains, as well as small impurities, are smaller than the screen holes and fall quickly through the screen holes under the action of gravity and vibration. Longer straws, weeds, rice leaves, and other large impurities are intercepted on the screen surface. Impurity conveying: Because the vibrating screen 28 is installed at an incline (the upper end is closer to the second motor) and vibrates continuously, the large impurities intercepted on the screen surface gradually move towards the lower end under the action of vibration inertia. Air removal: Impurities that have moved to the lower end of the vibrating screen 28 are first subjected to the airflow blown by the impurity removal fan 7, and light dust, broken leaves, etc. are instantly blown away. Heavier but still impurities such as straw are eventually discharged from the machine body through the opening on the opposite side and the discharge port 4 under the push of the subsequent materials and its own vibration, thus completing the removal of the main large and light impurities.

[0064] The mixture (mainly plump rice grains, empty grains, and a small amount of fine impurities) passing through the vibrating screen holes falls onto the conveyor belt 34 of the screening assembly below. Horizontal conveying: The third motor 31 starts, driving the drive roller 32, which in turn moves the conveyor belt 34 forward at a constant speed (towards the discharge end). The mixture is then transported smoothly. The guide plates 35 are close to both sides of the conveyor belt to prevent material from scattering during transport. Uniform spreading: As the conveyor belt approaches the discharge end, the upper material-distributing assembly begins to operate. The telescopic rod 36 can adjust the height of the material-distributing plate 40 as needed to control the thickness of the spreading layer. The fourth motor 37 (linear reciprocating motor) drives the material-distributing rod 38 and the material-distributing plate 40 in a reciprocating motion, thoroughly breaking up and smoothing any naturally formed accumulations or uneven layers of material on the conveyor belt, forming a thin, loose layer of material of uniform thickness. This step is crucial, as it creates optimal conditions for the next step of air separation, ensuring that every grain of rice is fully exposed to the airflow. A thin, evenly spread layer of material falls from the conveyor belt's discharge end and enters the final air-separation zone. Air-powered screening: Multiple screening fans 5, installed on the sidewall of the casing, continuously blow controlled airflow towards the falling material curtain. Lighter impurities such as empty grains and chaff are blown further away by the airflow. Heavier, plump rice grains fall almost vertically or are only blown a short distance. Inertial separation: The tip of the separator 41 (triangular structure) faces the discharge trajectory, acting as a "splitter" and guide for the falling material. Plump rice grains, due to their large mass and inertia, fall in a concentrated trajectory, mainly landing on the side of the separator closer to the discharge end, and ultimately flowing out through the first discharge hole 42 as clean grain. Empty grain collection: Empty grains blown by the airflow are deflected due to their trajectory; most will pass over the tip of the separator or land on the other side, ultimately flowing out through the second discharge hole 43 as substandard or waste material.

[0065] At this point, the rice mixture has completed the entire process from feeding and impurity removal to the separation of empty and shriveled grains, and the output is pure, plump rice grains and the separated empty and shriveled grains and impurities.

[0066] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A device for removing empty rice grains, characterized in that, include: The outer shell (1) is detachably connected to the rice harvester via several lugs (3), and the top of the outer shell (1) is fixedly connected to a funnel (2); An adjustable feeding assembly is fixedly installed inside the outer shell (1), and the feeding end of the adjustable feeding assembly corresponds to the bottom end of the funnel (2); The impurity removal component is fixedly installed inside the outer shell (1). The impurity removal component is located below the discharge end of the adjustable uniform material component. The adjustable uniform material component is used to uniformly distribute the rice entering the outer shell (1) so that the rice falls evenly onto the impurity removal component. The impurity removal component is used to treat the impurities in the rice. A screening component is fixedly installed inside the outer shell (1). The screening component is located below the impurity removal component and is used to remove empty rice grains. The adjustable feeding assembly includes a first motor (12), which is fixedly connected to the inner wall of the outer casing (1). One end of a first lead screw (13) is coaxially fixedly connected to the output end of the first motor (12). The first lead screw (13) is horizontally positioned, and the other end of the first lead screw (13) is rotatably connected to the inner wall of the outer casing (1). A slide block (15) is threaded onto the outer side of the first lead screw (13). A guide rod (14) is fixedly connected to the inner wall of the outer casing (1). The guide rod (14) is connected to the first lead screw... The lead screw (13) is parallel and located on the same horizontal plane. Another slide block (15) is slidably sleeved on the outside of the guide rod (14). The side walls of the two slide blocks (15) that are close to each other are respectively fixedly connected to side plates (16). An opening adjustment part is provided in the slide block (15). An adjustable material leveling part is rotatably connected between the two opening adjustment parts. The top of the adjustable material leveling part is fixedly connected to the inner top wall of the outer shell (1) and located at the bottom of the funnel (2). The side wall of the adjustable material leveling part slides in contact with the side wall of the side plate (16). The opening adjustment part includes a slide groove (23) opened in the side wall of the slide block (15), and a slide hole (24) is opened on the top wall of the slide groove (23). Two connecting blocks (25) are slidably arranged in the slide groove (23). An adjustment rod (26) is fixedly connected to the top of the connecting block (25). Two second fixing seats (21) are fixedly connected to the top of the slide block (15). The two second fixing seats (21) are respectively located at both ends of the slide hole (24). A bidirectional screw (22) is rotatably arranged between the two second fixing seats (21). The threads at both ends of the bidirectional screw (22) are opposite. The bidirectional screw (22) is threadedly connected to the two adjustment rods (26). The two adjustment rods (26) are respectively located at both ends of the bidirectional screw (22). Both connecting blocks (25) are rotatably connected to the adjustable material leveling part. The adjustable material leveling section includes two swing plates (8). The tops of the two ends of the swing plates (8) are respectively fixedly connected to a first connecting shaft (9). A first fixed seat (10) is rotatably sleeved on the outside of the first connecting shaft (9). The first fixed seat (10) is fixedly connected to the inner top wall of the outer shell (1). The two swing plates (8) are respectively located on both sides of the bottom end of the funnel (2). A sliding plate (11) is slidably connected inside the bottom end of the swing plate (8). A rotating shaft (18) is fixedly connected to both ends of the bottom end of the sliding plate (11). The rotating shaft (18) is rotatably connected to the connecting block (25). A gap is left between the bottom ends of the two sliding plates (11).

2. The apparatus for removing empty rice grains according to claim 1, characterized in that, The two swing plates (8) are provided with a number of limiting grooves (19) on their mutually distant sidewalls, and a number of limiting strips (20) are fixedly connected to the two sliding plates (11) on their mutually distant sidewalls. The limiting strips (20) correspond one-to-one with the limiting grooves (19) and are slidably connected.

3. The apparatus for removing empty rice grains according to claim 1, characterized in that, The impurity removal component includes a second motor (27), which is fixedly connected to the inner wall of the outer casing (1). The output shaft of the second motor (27) is fixedly connected to one corner of a vibrating screen (28). The vibrating screen (28) is located below the discharge end of the adjustable material leveling component. The other three corners of the vibrating screen (28) are slidably connected to slide rods (30). The slide rods (30) are fixedly connected to the inner wall of the outer casing (1). The vibrating screen (28) is inclined and its high end is close to the second motor (27). The two side walls at the low end of the vibrating screen (28) are respectively provided with notches. The side wall of the outer casing (1) is provided with an impurity removal part, which corresponds to the notch.

4. The apparatus for removing empty rice grains according to claim 3, characterized in that, The impurity removal section includes an impurity removal fan (7) and an impurity discharge port (4). The impurity removal fan (7) is fixedly installed on one side wall of the outer shell (1) and corresponds to the notch. The impurity discharge port (4) is opened on the other side wall of the outer shell (1) and corresponds to another notch.

5. The apparatus for removing empty rice grains according to claim 1, characterized in that, The screening assembly includes a third motor (31), which is fixedly connected to the inner wall of the outer shell (1). The output shaft of the third motor (31) is coaxially fixedly connected to one end of a drive roller (32). The other end of the drive roller (32) is rotatably connected to the inner side of the outer shell (1). A driven roller (33) is also rotatably connected to the inner wall of the outer shell (1). The driven roller (33) is parallel to the drive roller (32) and located on the same horizontal plane. The drive roller (32) and the driven roller (33) are driven together by a conveyor belt (34). The conveyor belt (34) is located below the impurity removal assembly. A material feeding assembly is provided above the discharge end of the conveyor belt (34). Several screening fans (5) are fixedly connected to the side wall of the outer shell (1). The screening fans (5) are located below the discharge end of the conveyor belt (34).

6. The apparatus for removing empty rice grains according to claim 5, characterized in that, The feeding assembly includes two telescopic rods (36), which are fixedly connected to the two opposite inner walls of the outer shell (1). The telescopic rods (36) are vertically arranged. A fourth motor (37) is fixedly connected to the bottom end of one telescopic rod (36), and a fixed sliding sleeve (39) is fixedly connected to the bottom end of the other telescopic rod (36). One end of the feeding rod (38) is coaxially fixedly connected to the output shaft of the fourth motor (37). The other end of the feeding rod (38) is slidably connected to the fixed sliding sleeve (39). A feeding plate (40) is fixedly connected to the bottom end of the feeding rod (38), and the feeding plate (40) is located above the conveyor belt (34).

7. The apparatus for removing empty rice grains according to claim 6, characterized in that, The outer shell (1) has two opposite inner sidewalls fixedly connected to one end of a guide plate (35), and the other end of the guide plate (35) slides in contact with the side of the conveyor belt (34). The inner bottom of the outer shell (1) is fixedly connected to a separator (41). The separator (41) has a triangular cross-section with the tip pointing upward. There is a gap between the tip of the triangle and the discharge end of the conveyor belt (34). The end of the separator (41) near the discharge end of the conveyor belt (34) forms a first discharge hole (42) between it and the bottom of the outer shell (1). The other end of the separator (41) forms a second discharge hole (43) between it and the bottom of the outer shell (1).

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