Chaff separator with screening structure

Abstract

The utility model relates to the field of chaff separators, and discloses a chaff separator with a screening structure, which comprises a box body, two rollers are rotatably connected in the box body, gears are fixedly connected to the right ends of the rollers, the two gears are meshed with each other, a screening plate is rotatably connected in the box body, and the screening plate is fixedly connected to the right ends of the rollers. A driving assembly is arranged in the box body, the screen plate swings back and forth through the driving assembly, the front side of the box body is connected with a box cover through a dismounting assembly, a through groove is formed in the middle end of the box cover, a sealing assembly is arranged in the through groove, and a discharging assembly is arranged on the rear side of the box body. Impurities such as rice husks on the sieve plate are discharged out of the box body through the discharging assembly. According to the rice husk separator, by optimizing the structure and the technology, the separation efficiency and the grain quality are improved, an ideal grain treatment solution is provided for agricultural enterprises, and the rice husk separator has high market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of rice husk separators, and more particularly to a rice husk separator with a screening structure. Background Technology

[0002] Rice husk separators are an important component of agricultural machinery, widely used in the grain processing industry, especially in the cleaning of grains such as rice, wheat, and corn. With the continuous development of modern agricultural technology, rice husk separators are constantly being updated, and their role and effectiveness in grain processing are becoming increasingly apparent. This article will start with the background technology of rice husk separators, exploring their working principle, development history, and importance in crop processing, especially the impact of the screening structure design on the separation effect.

[0003] The rice husk separator originated from an improvement on the traditional grain dehulling process. Traditional dehulling methods mainly rely on manual labor or simple mechanical tools, which are not only inefficient but also labor-intensive, failing to meet the demands of modern agricultural production for high efficiency and automation. With the improvement of agricultural mechanization, grain processing equipment has gradually developed towards high efficiency, intelligence, and precision, and the rice husk separator has emerged as a result.

[0004] In the early days, the design of rice husk separators focused primarily on improving the hulling device. Traditional mechanical devices relied on the physical principles of vibration or rollers to separate the husk from the rice grain through impact and friction. These devices typically required significant power to complete the hulling process, making the balance between efficiency and energy consumption a major technical challenge.

[0005] With advancements in technology, particularly in materials science, automation control, and precision machining, the design of modern rice husk separators has become increasingly detail-oriented. Beyond separation efficiency, the design also considers stability, durability, and ease of operation. The screening structure, a key design element of rice husk separators, has become a crucial component of modern rice husk separators, playing a vital role.

[0006] The core task of a husk separator is to effectively separate the husk from the grain. The working principle of a husk separator is typically based on methods such as sieving, airflow separation, and vibration.

[0007] Screening Structure Principle: The screening structure is a crucial part of the rice husk separator. Its basic principle is to use the aperture of the screen to separate materials of different sizes. Since there is usually a difference between the size of rice grains and the size of rice husks, the screen aperture design can ensure the separation of rice husks and grains. The screen design needs to consider factors such as aperture size, shape, and material to ensure sufficient screening effect during the separation process.

[0008] Airflow separation principle: Airflow separation is another common separation technology, especially suitable for situations where there is a significant difference in density between grains and husks. In a husk separator, the airflow separation device typically generates an airflow, which separates the lighter husks from the heavier grains. This method is usually used in conjunction with a screening structure to greatly improve separation efficiency.

[0009] Vibration Principle: To improve material separation efficiency, many rice husk separators employ vibrating screens. The vibrating screen uses a motor-driven vibration device to generate up-and-down or left-and-right vibrations in the screen mesh, causing the material to continuously tumble and roll on the screen surface, promoting separation. Vibrating screens effectively improve screening efficiency and reduce problems such as material jamming and clogging.

[0010] The design of the screening structure plays a crucial role in the overall performance and separation effect of the rice husk separator. The screening structure mainly includes several aspects such as the design of the screen mesh, the setting of the screen surface angle, and the selection of the vibration mode.

[0011] Screen Design: The screen is one of the most critical components of the screening structure, directly determining the efficiency and quality of grain separation. The screen aperture needs to be selected based on the size difference between the grains and husks. Generally, the aperture should be slightly larger than the grain size and slightly smaller than the husk size. Furthermore, the screen material must also consider its wear resistance and corrosion resistance. Common screen materials include stainless steel and alloy steel, which effectively extend the screen's lifespan.

[0012] Screen angle setting: The screen angle has a significant impact on the material's movement trajectory and screening effect. Generally, a smaller screen angle results in a longer residence time of the material on the screen, which is beneficial for screening; while a larger screen angle results in a faster material movement speed and higher separation efficiency. A reasonable screen angle setting can improve the separation efficiency of grains and husks, and avoid clogging and material jamming.

[0013] Vibration mode selection: Different vibration modes will have different effects on the separation effect of materials. Common vibration modes include up-and-down vibration, left-and-right vibration, and spiral vibration. Each vibration mode is suitable for different types of materials. Therefore, when designing a rice husk separator, it is necessary to select the appropriate vibration mode according to the actual situation. For example, for lighter grains such as rice, stronger vibration can improve the separation effect; while for heavier corn kernels, lighter vibration is required to avoid excessive damage to the material.

[0014] Rice husk separators offer numerous advantages in grain processing, particularly due to their optimized screening structure, which significantly enhances separation efficiency. Firstly, they efficiently separate grains from husks, ensuring final grain quality and improving processing efficiency. Secondly, modern rice husk separators are highly automated, reducing manual labor and increasing production efficiency.

[0015] The technology of rice husk separators has been continuously developing, especially the design of the screening structure, which has brought revolutionary changes to grain processing. Modern rice husk separators have shown significant advantages in improving production efficiency, reducing manual operation, and improving separation results. However, with continuous technological advancements, future rice husk separators will develop towards intelligence, energy saving, and multi-functionality, providing strong support for the sustainable development of the grain processing industry.

[0016] However, current rice husk separators have the following drawbacks: Screening is easily obstructed: Without an additional drive source, rice husks and grain particles easily accumulate on the screen plate, leading to poor screening and difficulty in accurately separating rice husks and grains, affecting processing quality and efficiency. Maintenance is difficult: The internal structure design is not conducive to daily maintenance, making operation inconvenient for staff, cleaning and repair cumbersome, consuming manpower and time, and hindering continuous production.

[0017] In response to this technical problem, this application proposes a rice husk separator with a screening structure. Summary of the Invention

[0018] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a rice husk separator with a screening structure. This invention aims to improve screening efficiency while conserving resources, prevent rice husks and grain particles from accumulating on the screen plate and affecting screening efficiency, and facilitate maintenance of the machine's internal components, thereby improving the ease of machine maintenance.

[0019] To achieve the above objectives, the present invention provides the following technical solution:

[0020] A rice husk separator with a screening structure includes a housing. Two rollers are rotatably connected inside the housing. Gears are fixedly connected to the right end of each roller, and the two gears mesh with each other. A screen plate is rotatably connected inside the housing. A drive assembly is installed inside the housing to cause the screen plate to swing back and forth. A cover is connected to the front of the housing via a disassembly assembly for disassembly and installation. A through groove is formed in the middle of the cover, and a sealing assembly is installed inside the through groove to seal it. A discharge assembly is installed at the rear of the housing to discharge rice husks and other impurities from the screen plate.

[0021] Furthermore, the drive assembly includes a rotating rod rotatably connected inside the housing, with a cam fixedly connected to the right end of the rotating rod. The front cam is located below the sieve plate, and the rear cam is located above the sieve plate.

[0022] Furthermore, pulleys are fixedly connected to the left ends of the rotating rod and the roller, and the upper and lower pulleys are connected through the inner side of the belt. A sliding groove is provided on the inner wall of the box, and a cover plate is fixedly connected to the left and right sides of the screen plate. The cover plate is slidably connected inside the sliding groove.

[0023] Furthermore, the disassembly assembly includes four cavities formed on the front side of the box, with a fixing rod slidably connected inside each cavity. The end of the fixing rod is inserted into the inside of the box cover, and a handle is rotatably connected to both the left and right sides of the box via a damping shaft.

[0024] Furthermore, the fixed rod is internally threaded with a threaded rod, the end of which is rotatably connected to the inside of the housing, and the end of which is fixedly connected to the inside of the handle.

[0025] Furthermore, the enclosure assembly includes a baffle that is slidably connected inside the through groove, a slide rod that is fixedly connected to the front side of the baffle, a positioning rod that is fixedly connected to the front side of the housing, a crossbar that is rotatably connected to the top side of the slide rod, and the bottom side of the crossbar abutting against the top side of the positioning rod.

[0026] Furthermore, the discharge assembly includes a blower installed on the rear side of the housing, an air outlet plate is fixedly connected to the rear side of the housing, and the output end of the blower and the air outlet plate are connected by a pipe.

[0027] Furthermore, a motor is installed on the right side of the box, the drive end of the motor is fixedly connected to the right end of the rear roller, a feed chute is fixedly connected to the top side of the box, and a guide plate is fixedly connected inside the box.

[0028] The purpose of a rice husk separator is to remove impurities such as rice husks from grains, ensuring the purity of the grains. The equipment needs to have a screening structure and be able to effectively separate, clean, and discharge the rice husks.

[0029] The design process of this application mainly includes the following aspects:

[0030] The overall structural layout of the equipment was determined. First, a housing was designed as the main frame of the equipment, containing several important components:

[0031] Roller system: Used to propel the grain forward and drive the movement of the screen plate.

[0032] Screen plate: Used for screening grains and chaff. The screen plate can be oscillated back and forth by a drive component to enhance the separation effect.

[0033] Gears and drive system: A gear is installed at the right end of the roller, and the synchronous rotation of the roller is ensured by the meshing of the gears. The drive components (such as motors, rotating rods, cams, etc.) are used to drive the oscillation of the screen plate.

[0034] Choose a suitable drive system to ensure efficient operation of the screen plate and roller system. The rear roller is driven by a motor, with the motor's drive end connected to the right end of the roller, thus rotating it. The motor's drive end is also linked to a cam via a rotating rod, causing the screen plate to oscillate back and forth.

[0035] To ensure the screen plate can work effectively in conjunction with the roller, a pulley is designed to connect the left end of the roller and the left end of the rotating rod. The pulley and the inner side of the belt are connected to ensure synchronized drive. The left and right sides of the screen plate are slidably connected to grooves within the housing via baffles, facilitating adjustment of the screen plate's movement trajectory and ensuring optimal screening performance.

[0036] The enclosure features a design that facilitates easy disassembly and installation, ensuring convenient cleaning and maintenance of the equipment. The enclosure is connected to the enclosure via a disassembly assembly consisting of four cavities and a sliding retaining rod, allowing for easy removal and installation. To further enhance ease of disassembly, the retaining rod is internally connected to a threaded rod, which allows adjustment of the handle's locking position.

[0037] To ensure effective grain separation, a closed assembly was designed, using sliding baffles and positioning rods to seal the channels within the container. This prevents material leakage and ensures the effective discharge of husks and impurities.

[0038] To remove impurities such as rice husks separated from the sieve plate from the chamber, a blower and discharge assembly were designed. The blower is located at the rear of the chamber and is connected to the air outlet plate via a pipe, allowing airflow to effectively remove the impurities.

[0039] Based on the equipment's working environment and load, appropriate materials are selected to manufacture each component to ensure the equipment's durability and stability. For example, the housing material can be made of sturdy and durable steel, while components such as screen plates and rollers can be made of materials with wear-resistant properties.

[0040] The proposed solution is efficient, easy to maintain, and convenient to operate, thus meeting the needs of grain separation.

[0041] This utility model has the following beneficial effects:

[0042] 1. The main function of a rice husk separator is to separate grains from their husks or impurities, ensuring the purity of the grains. Through a rationally designed screening structure and a sophisticated roller system, the separator can efficiently remove impurities (such as rice husks) from the grains. The screen plate is designed to work in perfect harmony with the movement of the rollers; through screening and impact, it not only improves the separation accuracy but also ensures that the grains are not damaged. In this way, the equipment not only effectively removes the rice husks but also preserves the integrity of the grains, improving their quality and providing high-quality raw materials for subsequent processing.

[0043] 2. The design of this separator emphasizes the rationality of the power system, employing a high-efficiency motor and drive system. Through optimized gear transmission and a linkage mechanism between the rotating rod and the cam, the equipment can complete efficient separation work with low power consumption. The movement of the screen plate is driven by the motor, and the movement of the rollers and screen plate is driven by a reasonable transmission system, thereby avoiding unnecessary energy waste. In addition, the precise power control system ensures that the equipment can minimize energy consumption during operation while ensuring high working efficiency. In this way, users can obtain high production benefits with low operating costs;

[0044] 3. The design of the enclosure and all components takes into account the working environment and load, ensuring stable operation even under high intensity and high load conditions. Furthermore, the precise structural design and excellent sealing guarantee that the equipment is not easily affected by external environmental interference during use, extending its service life.

[0045] 4. The removable lid design allows for easy cleaning of the equipment, preventing grain residue or contamination that may occur during husk separation. The rationally designed fixing rod and threaded rod mechanism greatly simplifies equipment maintenance and repair, allowing operators to perform routine maintenance and cleaning without complicated tools or excessive procedures. This saves maintenance time, reduces the likelihood of downtime due to equipment failure, and improves production efficiency.

[0046] 5. In the design of the equipment, in addition to performance and efficiency, safety is also an important consideration. Through careful design of the internal structure, all moving parts are appropriately protected, avoiding exposure of mechanical components and preventing direct contact between operators and the machine, thereby reducing the occurrence of accidents. Furthermore, the operation and maintenance processes of the equipment are designed with safety in mind, employing easy-to-use buttons and control systems to ensure that operators can use the equipment safely and conveniently. This design not only improves the overall safety of the equipment but also protects the health and safety of the operators.

[0047] 6. Driven by a motor and under automatic control, the equipment can automatically complete the separation, cleaning, and discharge of rice husks, requiring only simple adjustments and monitoring by operators. This automated design significantly reduces the need for manual intervention, enabling the equipment to operate stably and efficiently with minimal human involvement. Simultaneously, the automated control system can automatically adjust operating parameters based on the actual operating conditions of the equipment, ensuring it remains in optimal working condition and improving the stability and consistency of the production process.

[0048] 7. The designed blower and discharge components effectively remove separated impurities such as rice husks, preventing waste accumulation and environmental pollution. The blower uses airflow to expel impurities from the equipment, improving separation efficiency and reducing environmental impact during cleaning. The internal sealing design effectively prevents material leakage, ensuring a clean and tidy operation, thus better meeting the environmental protection requirements of modern agricultural machinery.

[0049] 8. The high efficiency, stability, and ease of maintenance of this grain husk separator give it a strong competitive edge in the market. Whether for small farms or large-scale agricultural processing enterprises, this separator provides an efficient and low-cost grain processing solution. Its low operating costs and high production efficiency allow users to gain a foothold in the market, thereby enhancing overall market competitiveness. Furthermore, the equipment's long lifespan and low maintenance costs make it a product with a high return on investment, possessing strong market appeal.

[0050] 9. The rice husk separator of this application, by comprehensively considering all aspects of the equipment's performance and details, ensures that the equipment possesses advantages in many aspects, including high efficiency, durability, ease of maintenance, safety, and environmental friendliness. These beneficial effects not only improve the equipment's working efficiency and economic benefits but also enhance its competitiveness in the market, providing farmers and agricultural enterprises with an ideal grain processing tool. Attached Figure Description

[0051] Figure 1 This is a perspective view of a rice husk separator with a screening structure proposed in this utility model;

[0052] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0053] Figure 3 This is a rear view of a rice husk separator with a screening structure proposed in this utility model;

[0054] Figure 4 Schematic diagram of the internal structure of the box of a rice husk separator with a screening structure proposed in this utility model. Figure 1 ;

[0055] Figure 5 Schematic diagram of the internal structure of the box of a rice husk separator with a screening structure proposed in this utility model. Figure 2 ;

[0056] Figure 6 This is a schematic diagram of the chute structure of a rice husk separator with a screening structure proposed in this utility model.

[0057] Figure 7 This is a schematic diagram of the sieve plate structure of a rice husk separator with a sieving structure proposed in this utility model;

[0058] Figure 8 This is a schematic diagram of the insert structure of a rice husk separator with a screening structure proposed in this utility model;

[0059] Legend:

[0060] 1. Feed chute; 2. Box cover; 3. Box body; 4. Motor; 5. Gear; 6. Slide bar; 7. Crossbar; 8. Positioning rod; 9. Pulley; 10. Blower; 11. Pipe; 12. Air outlet plate; 13. Guide plate; 14. Roller; 15. Screen plate; 16. Cam; 17. Baffle; 18. Fixing rod; 19. Rotating rod; 20. Threaded rod; 21. Rotating handle; 22. Baffle. Detailed Implementation

[0061] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0062] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a rice husk separator with a screening structure, comprising a housing 3, inside which two rollers 14 are rotatably connected to separate the rice husks. Gears 5 are fixedly connected to the right end of each roller 14, and the two gears 5 mesh with each other, causing the two rollers 14 to rotate relative to each other. A screen plate 15 is rotatably connected inside the housing 3, separating the rice grains and rice husks. The rice grains fall downwards through the screen plate 15, while the rice husks remain on it. A cover 2 is connected to the front of the housing 3, and a through groove is provided in the middle of the cover 2. (Refer to...) Figures 5-7Inside the housing 3, a rotating rod 19 is rotatably connected. A cam 16 is fixedly connected to the right end of the rotating rod 19. The front cam 16 is positioned below the sieve plate 15, and the rear cam 16 is positioned above the sieve plate 15. The rotating rod 19 drives the cam 16 to rotate, causing the cam 16 to push the sides of the sieve plate 15 to slide. This causes the sides of the sieve plate 15 to swing back and forth around its central axis, thus better shaking the husks and grain particles on the sieve plate 15, improving the screening effect and preventing the husks and grain particles from accumulating on the sieve plate 15 and affecting the screening process. For screening, pulleys 9 are fixedly connected to the left ends of both the rotating rod 19 and the roller 14. The upper and lower pulleys 9 are connected by the inner side of a belt. The belt and pulleys 9 cause the rotating rod 19 to rotate when the roller 14 rotates. A sliding groove is provided on the inner wall of the box 3. Blind plates 17 are fixedly connected to the left and right sides of the screen plate 15. The blind plates 17 are slidably connected inside the sliding groove. The sliding of the blind plates 17 inside the sliding groove allows the screen plate 15 to rotate back and forth inside the box 3. The blind plates 17 can also prevent grain particles and chaff from entering the sliding groove and affecting the rotation. (Refer to...) Figure 1 and Figure 8 The front of the housing 3 has four cavities, and a fixing rod 18 is slidably connected inside the cavity. The end of the fixing rod 18 is inserted into the inside of the housing cover 2. By inserting the fixing rod 18 into the housing cover 2, the housing cover 2 is fixed to the housing 3. The left and right sides of the housing 3 are rotatably connected to the rotating handle 21 through the damping shaft. The fixing rod 18 is threadedly connected to the threaded rod 20. The end of the threaded rod 20 is rotatably connected to the inside of the housing 3, and the end of the threaded rod 20 is fixedly connected to the inside of the rotating handle 21. The rotating handle 21 causes the threaded rod 20 to rotate, thereby allowing the fixing rod 18 to be inserted into or removed from the housing cover 2, making the housing cover 2 easy to disassemble, thus facilitating the maintenance of the machine's interior by the staff.

[0063] Reference Figure 1 Figure 2 A baffle 22 is slidably connected inside the channel, which closes the channel. A sliding rod 6 is fixedly connected to the front of the baffle 22, and a positioning rod 8 is fixedly connected to the front of the housing 3. A crossbar 7 is rotatably connected to the top of the sliding rod 6, and the bottom of the crossbar 7 abuts against the top of the positioning rod 8. By abutting the crossbar 7 against the top of the positioning rod 8, the position of the baffle 22 is fixed, thus opening the channel. (Refer to...) Figure 3 and Figure 5 A blower 10 is installed on the rear side of the housing 3, and an air outlet plate 12 is fixedly connected to the rear side of the housing 3. The output end of the blower 10 and the air outlet plate 12 are connected by a pipe 11. The blower 10 delivers airflow to the air outlet plate 12, causing the air outlet plate 12 to blow away the sieve plate 15, thereby blowing away the grain particles retained on the sieve plate 15 through the trough of the housing 3. A motor 4 is installed on the right side of the housing 3. Figure 1 and Figure 4 The drive end of the motor 4 is fixedly connected to the right end of the rear roller 14. The motor 4 drives the rear roller 14 to rotate. The top side of the box 3 is fixedly connected to the feed chute 1. The inside of the box 3 is fixedly connected to the guide plate 13. Grains are added to the box 3 through the feed chute 1 and guided between the two rollers 14 through the guide plate 13.

[0064] Working principle: First, the motor 4 is started to drive the rear roller 14 to rotate. Under the action of two meshing gears 5, the front roller 14 will rotate in opposite directions to the rear roller 14. Then, the grain is added into the box 3 through the feed chute 1. Under the action of the guide plate 13, the grain will fall between the two rollers 14, so that the rollers 14 squeeze and knead the grain, thereby separating the grain particles. Then, the grain particles and husks will fall onto the screen plate 15, so that the grain particles and husks are separated. The grain particles will pass through the screen. As plate 15 falls downwards, the chaff remains on it. During this process, the roller 14 drives the rotating rod 19 to rotate due to the action of the belt and pulley 9. Because the two rollers 14 rotate in opposite directions, the two cams 16 also rotate in opposite directions. That is, when the larger side of one cam 16 is against the sieve plate 15, the smaller side of the other cam 16 will be against the sieve plate 15, swinging back and forth around the central axis of the sieve plate 15. This allows the sieve plate 15 to better shake off the chaff and grain particles. The machine moves to improve the screening effect and prevent chaff and grain particles from accumulating on the screen plate 15, thus affecting the screening effect. The grain particles will fall downward through the box 3 and eventually be collected in the container. The chaff left on the screen plate 15 will be removed from the box 3 by the blower 10 after the separation work is completed. When it is necessary to clean the chaff, first slide the slide bar 6 upward to make it slide above the positioning bar 8, then rotate the crossbar 7 and slide the slide bar 6 downward so that the crossbar 7 abuts against the positioning bar 8, thereby fixing the position of the baffle 22 and opening the passage. Then start. The blower 10 delivers airflow to the air outlet plate 12, causing the air outlet plate 12 to blow away the sieve plate 15, thereby removing the grain particles retained on the sieve plate 15 through the trough and blowing them out of the housing 3. After blowing is complete, the baffle 22 is slid back into the trough to seal it. When maintenance is required inside the machine, simply turn the handle 21 to rotate the threaded rod 20, causing the fixing rod 18 to disengage from the cover 2, thus removing the cover 2. After that, maintenance can be performed inside the machine. When the cover 2 needs to be installed back onto the housing 3, simply repeat the above process in reverse.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A husker with a screening structure, characterized by: The utility model provides a kind of rice huller, including box (3), the inside rotation connection of the box (3) is equipped with two roller (14), the right end of the roller (14) is fixedly connected with gear (5), and the gear (5) between each other is engaged, the inside rotation connection of the box (3) is equipped with sieve plate (15), the inside of the box (3) is provided with drive assembly, and sieve plate (15) is made to swing back and forth by drive assembly, the front side of the box (3) is connected with box cover (2) by dismounting assembly, and box cover (2) is disassembled and installed by dismounting assembly, the middle end of the box cover (2) is equipped with through slot, the inside of the through slot is provided with closure assembly, and the through slot is closed by closure assembly, the rear side of the box (3) is provided with discharge assembly, and the chaff on sieve plate (15) is discharged from the box (3) by discharge assembly.

2. The chaffer separator according to claim 1, characterized in that: The drive assembly includes a rotating shaft (19) rotatably connected inside the box (3), a cam (16) fixedly connected to the right end of the rotating shaft (19), and the cam (16) is below the sieve plate (15) on the front side and above the sieve plate (15) on the back side.

3. The chaff separator with a screening structure according to claim 2, characterized in that: The left end of the rotating shaft (19) and the roller (14) is fixedly connected with a belt pulley (9), and the upper and lower belt pulleys (9) are connected by a belt inside. The inner wall of the box (3) is provided with a sliding groove, and the left and right sides of the sieve plate (15) are fixedly connected with a shutter (17), which is slidingly connected inside the sliding groove.

4. The chaff separator with a screening structure according to claim 1, characterized in that: The dismounting assembly includes four cavities opened in the front side of the box (3), a fixed rod (18) slidingly connected inside the cavities, and the end of the fixed rod (18) is inserted into the inside of the box cover (2). The left and right sides of the box (3) are rotatably connected with a handle (21) through a damping shaft.

5. The chaff separator with a screening structure according to claim 4, characterized in that: The inside of the fixed rod (18) is threadedly connected with a threaded rod (20), the end of the threaded rod (20) is rotatably connected inside the box (3), and the end of the threaded rod (20) is fixedly connected inside the handle (21).

6. The chaff separator with a screening structure according to claim 1, characterized in that: The closure assembly includes a baffle (22) slidingly connected inside the through slot, a sliding rod (6) fixedly connected to the front side of the baffle (22), a positioning rod (8) fixedly connected to the front side of the box (3), a horizontal rod (7) rotatably connected to the top side of the sliding rod (6), and the bottom side of the horizontal rod (7) abuts against the top side of the positioning rod (8).

7. The chaff separator with a screening structure according to claim 1, characterized in that: The discharge assembly includes a blower (10) installed on the rear side of the box (3), an air outlet plate (12) fixedly connected to the rear side of the box (3), and the output end of the blower (10) and the air outlet plate (12) are connected by a pipeline (11).

8. The chaff separator with a screening structure according to claim 1, characterized in that: A motor (4) is installed on the right side of the box (3), the drive end of the motor (4) is fixedly connected to the right end of the rear roller (14), a feeding chute (1) is fixedly connected to the top side of the box (3), and a guide plate (13) is fixedly connected inside the box (3).

Images