An agricultural seed thresher

Abstract

This utility model relates to the field of agricultural seed threshing technology, specifically disclosing an agricultural seed threshing machine, including a base plate, a threshing box arranged above the base plate, two rubber rollers rotatably connected inside the threshing box, an auxiliary feeding mechanism arranged above the two rubber rollers, a dirt removal and collection mechanism arranged below the two rubber rollers, and a drive mechanism arranged behind the two rubber rollers. The auxiliary feeding mechanism includes a frame that is fixedly connected to the upper end of the threshing box through it; a first drive motor drives the uniform roller to rotate, and the grooves on its outer wall receive the material one by one; the sealing block on the inner wall of the frame is in clearance fit with the uniform roller. This dynamic feeding method effectively improves the stability and uniformity of feeding, and avoids the situation of obstructed feeding. The rectangular sealing ring on the left side of the dirt removal box abuts against the L-shaped collection frame to prevent leakage, which facilitates the collection of blown-out impurities without the need for subsequent manual cleaning, reducing labor intensity and pollution to the working environment.

Description

Technical Field

[0001] This utility model relates to the field of agricultural seed threshing technology, and specifically discloses an agricultural seed threshing machine. Background Technology

[0002] Agricultural seeds are the unique reproductive organs of seed plants, developing from fertilized ovules. They are not only the core carriers for plant reproduction but also an important food source for humans and animals. As the most basic means of agricultural production, seed quality directly determines crop yield and quality. Rice, as one of the world's major food crops, has seeds (paddies) tightly encased in a hard husk. A tough connecting structure exists between the husk and the brown rice, requiring hulling and threshing to obtain edible or seed-ready grains. Especially for rice as a seed crop, the integrity of the grains during threshing is extremely important; the breakage rate must be controlled to a very low level to ensure germination rate and commercial value.

[0003] In existing technologies, rice threshing and dehulling often employs rubber roller threshing technology. Its core components are paired rubber rollers, which are typically coated with elastic materials such as polyurethane, providing excellent wear resistance and flexible contact characteristics. During operation, the two rollers rotate in opposite directions via gear transmission, creating a speed difference. Utilizing the friction of the rubber surfaces and the squeezing force between the rollers, the incoming rice ears are threshed in a kneading manner. This method effectively reduces grain breakage and is more suitable for handling fragile rice grains than metal components.

[0004] However, existing rubber roller threshing devices still have obvious defects in practical applications: First, the flow rate adjustment during feeding mostly relies on the movable baffle on the lower side of the hopper. After the adjustment is completed, the baffle is stationary, which can easily cause the material to block inside the hopper, resulting in poor feeding and thus failing to ensure the stability of the feeding. It is necessary to stir and clear the blockage by hand or tools from time to time. Second, the cleaning of impurities after threshing is generally done by blowing with a blower, but there is no effective collection device for the blown impurities. The scattered impurities need to be cleaned manually afterward, which increases the labor intensity and pollutes the working environment.

[0005] Therefore, an agricultural seed threshing machine is needed to solve the above problems. Utility Model Content

[0006] This utility model proposes an agricultural seed thresher that improves the stability and uniformity of feeding, avoiding feeding obstruction; it also facilitates the collection of blown-out impurities, eliminating the need for subsequent manual cleaning, reducing labor intensity and pollution to the working environment.

[0007] This utility model is implemented as follows: an agricultural seed thresher includes a base plate, a threshing box is arranged above the base plate, two rubber rollers are rotatably connected inside the threshing box, an auxiliary feeding mechanism is arranged above the two rubber rollers, a dirt removal and collection mechanism is arranged below the two rubber rollers, and a driving mechanism is arranged behind the two rubber rollers.

[0008] The auxiliary feeding mechanism includes a frame that is fixedly connected to the upper end of the threshing box. A uniform feeding roller is rotatably connected inside the frame. The outer wall of the uniform feeding roller has multiple grooves that are evenly distributed in the circumferential direction. The left and right sides of the inner wall of the frame are fixedly connected to the sealing blocks that are in clearance fit with the uniform feeding roller. A first drive motor that is fixedly connected to the uniform feeding roller is installed on the outer wall of the frame. A feeding hopper is installed at the upper end of the frame.

[0009] The impurity removal and collection mechanism includes an impurity removal box fixedly connected to the outer wall of the threshing box and having an open structure on the left side. Guide inclined plates are fixedly connected to both ends of the inner wall of the threshing box. An axial flow fan is fixedly connected through the right end of the impurity removal box. An L-shaped collection frame is provided on the upper side of the bottom plate. A rectangular sealing ring that abuts against the right side of the L-shaped collection frame is embedded in the left side of the impurity removal box through a groove. An installation groove is provided through the left end of the L-shaped collection frame, and a filter cloth is installed inside the installation groove.

[0010] As a preferred embodiment of the present invention, the driving mechanism includes a driving frame fixedly connected to the rear end of the threshing box, shafts fixedly connected to the rear ends of the two rubber rollers, gears fixedly connected to the rear ends of the two shafts, the two gears being of different sizes and meshing with each other, and a second driving motor having its output end fixedly connected to one of the gears mounted on the outer wall of the driving frame.

[0011] As a preferred embodiment of the present invention, an agricultural seed threshing machine is provided with a T-shaped limiting groove at the upper end of the base plate, and a T-shaped limiting block that is fixedly connected to an L-shaped collecting frame is inserted into the T-shaped limiting groove.

[0012] As a preferred embodiment of the present invention, an agricultural seed threshing machine has two support plates fixedly connected between the impurity removal box and the base plate. An electromagnet is installed at the left end of the left support plate, and an iron disk that attracts the electromagnet is installed on the outer wall of the L-shaped collection frame.

[0013] As a preferred embodiment of the agricultural seed threshing machine of this utility model, the lower end of the impurity removal box is equipped with a discharge hopper extending into the interior of the impurity removal box.

[0014] As a preferred embodiment of this utility model of an agricultural seed thresher, the inner wall of the axial flow fan is equipped with two protective mesh plates.

[0015] As a preferred embodiment of this utility model of an agricultural seed threshing machine, guide blocks are fixedly connected to both the left and right ends of the inner wall of the threshing box, and guide strips with triangular cross-sections are fixedly connected to the upper ends of the two sealing blocks.

[0016] The beneficial effects of this utility model are:

[0017] 1. During operation, rice seeds to be threshed are fed into the hopper and enter the frame. The first drive motor drives the feeding roller to rotate, and the grooves on its outer wall receive the material one by one. The sealing block on the inner wall of the frame fits with the feeding roller to prevent material leakage and ensure that the material can only fall evenly between the two rubber rollers as the grooves rotate. This dynamic feeding method effectively improves the stability and uniformity of feeding and avoids feeding obstructions.

[0018] 2. After threshing, the grains and impurities fall onto the guide plate and slide into the impurity removal box. The axial flow fan on the right side of the box starts, generating airflow that blows the lighter impurities in the mixture to the left. The impurities enter the L-shaped collection frame through the opening on the left side of the box, where they are intercepted and collected by the filter cloth inside the frame, while the air is discharged. The rectangular sealing ring on the left side of the box abuts against the L-shaped collection frame to prevent leakage. This structural design facilitates the collection of blown-out impurities, eliminating the need for subsequent manual cleaning, reducing labor intensity, and minimizing pollution to the working environment. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a front sectional view of an agricultural seed thresher according to the present invention;

[0021] Figure 2 This is a front sectional view of the axial flow fan of this utility model;

[0022] Figure 3 This is a partial top sectional view of the present invention;

[0023] Figure 4 This is a structural diagram of the material leveling roller of this utility model;

[0024] Figure 5 This is a structural diagram of the L-shaped collection frame of this utility model.

[0025] The markings in the diagram are: 1. Base plate; 2. Threshing box; 3. Rubber roller; 4. Guide block; 5. Guide inclined plate; 6. Shaft; 7. Gear; 8. Drive frame; 9. Second drive motor; 10. Frame body; 11. Equalizing roller; 12. First drive motor; 13. Sealing block; 14. Feeding hopper; 15. Impurity removal box; 16. Axial flow fan; 17. Protective mesh plate; 18. Rectangular sealing ring; 19. L-shaped collection frame; 20. Filter cloth; 21. Electromagnet; 22. Iron disk; 23. Discharge hopper; 24. T-shaped limiting groove; 25. T-shaped limiting block. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0027] Please see Figure 1-5 An agricultural seed thresher includes a base plate 1, a threshing box 2 above the base plate 1, two rubber rollers 3 rotatably connected inside the threshing box 2, an auxiliary feeding mechanism above the two rubber rollers 3, a dirt removal and collection mechanism below the two rubber rollers 3, and a drive mechanism behind the two rubber rollers 3.

[0028] The auxiliary feeding mechanism includes a frame 10 that is fixedly connected to the upper end of the threshing box 2. A uniform roller 11 is rotatably connected inside the frame 10. The outer wall of the uniform roller 11 has a plurality of grooves evenly distributed along the circumference. The left and right sides of the inner wall of the frame 10 are fixedly connected to a sealing block 13 that is in clearance fit with the uniform roller 11. A first drive motor 12 that is fixedly connected to the uniform roller 11 is installed on the outer wall of the frame 10. A feeding hopper 14 is installed at the upper end of the frame 10.

[0029] The impurity removal and collection mechanism includes an impurity removal box 15 fixedly connected to the outer wall of the threshing box 2 and having an open structure on the left side. Guide inclined plates 5 are fixedly connected to both ends of the inner wall of the threshing box 2. An axial flow fan 16 is fixedly connected through the right end of the impurity removal box 15. An L-shaped collection frame 19 is provided on the upper side of the bottom plate 1. A rectangular sealing ring 18 is embedded in the left side of the impurity removal box 15 through a groove, which abuts against the right side of the L-shaped collection frame 19. An installation groove is provided through the left end of the L-shaped collection frame 19, and a filter cloth 20 is installed inside the installation groove.

[0030] In this embodiment: During operation, the rice seeds to be threshed are first fed into the feeding hopper 14, and the material enters the frame 10 through the feeding hopper 14. At this time, the first drive motor 12 starts and drives the leveling roller 11 to rotate. The grooves on the outer wall of the leveling roller 11 receive the material one by one as it rotates. At the same time, the sealing block 13 on the inner wall of the frame 10 forms a gap fit with the leveling roller 11, which can prevent the material from leaking out from both sides, so that the material can only fall evenly between the two rubber rollers 3 as the grooves rotate. Through this dynamic feeding method, the stability and uniformity of feeding are effectively improved, and the situation of feeding obstruction is avoided.

[0031] Meanwhile, the drive mechanism drives the two rubber rollers 3 to rotate in opposite directions, creating a speed difference. When the material falls from the leveling roller 11 between the two rubber rollers 3, the seeds are threshed through compression and friction under the action of the reverse rotation of the rubber rollers 3 and the speed difference. The guide block 4 on the inner wall of the threshing box 2 guides the falling material, ensuring that it accurately enters the working area of ​​the two rubber rollers 3.

[0032] After threshing, the grains and impurities fall onto the guide ramp 5 and slide into the impurity removal box 15. At this time, the axial flow fan 16 at the right end of the impurity removal box 15 starts, and the airflow it generates blows the light impurities in the mixture to the left. Under the action of the airflow, the impurities enter the L-shaped collection frame 19 through the opening on the left side of the impurity removal box 15. The filter cloth 20 inside the L-shaped collection frame 19 intercepts and collects the impurities, while the air can be discharged through the filter cloth 20. The rectangular sealing ring 18 on the left side of the impurity removal box 15 abuts against the L-shaped collection frame 19, preventing impurities from leaking out from the gaps. This structural design facilitates the collection of blown-out impurities, eliminates the need for subsequent manual cleaning, reduces labor intensity, and minimizes pollution to the working environment.

[0033] As a technical optimization of this utility model, the drive mechanism includes a drive frame 8 fixedly connected to the rear end of the threshing box 2, a shaft 6 fixedly connected to the rear end of each of the two rubber rollers 3, a gear 7 fixedly connected to the rear end of each of the two shafts 6, the two gears 7 being of different sizes and meshing with each other, and a second drive motor 9 with its output end fixedly connected to one of the gears 7 installed on the outer wall of the drive frame 8.

[0034] In this embodiment: In the drive mechanism, after the second drive motor 9 starts, it drives the gear 7 connected to it to rotate. Since the two gears 7 are different in size and mesh with each other, they will drive the two rubber rollers 3 to rotate in opposite directions in the threshing box 2 through the shaft 6, forming a stable speed difference, which provides the power basis for the rubber rollers 3 to thresh through extrusion and friction.

[0035] As a technical optimization of this utility model, a T-shaped limiting groove 24 is provided at the upper end of the base plate 1, and a T-shaped limiting block 25 that is fixedly connected to the L-shaped collecting frame 19 is inserted into the T-shaped limiting groove 24.

[0036] In this embodiment, the T-shaped limiting groove 24 on the base plate 1 is inserted into the T-shaped limiting block 25 at the bottom of the L-shaped collecting frame 19 to limit the L-shaped collecting frame 19 and prevent the L-shaped collecting frame 19 from moving in the up-down or back-and-forth directions.

[0037] As a technical optimization of this utility model, two support plates are fixedly connected between the impurity removal box 15 and the base plate 1. An electromagnet 21 is installed at the left end of the left support plate, and an iron disk 22 that is attracted to the electromagnet 21 is installed on the outer wall of the L-shaped collection frame 19.

[0038] In this embodiment, the iron disk 22 on the outer wall of the L-shaped collection frame 19 is attracted and cooperated with the electromagnet 21 to prevent the L-shaped collection frame 19 from moving during operation, and at the same time facilitates disassembly and cleaning of impurities.

[0039] As a technical optimization of this utility model, a discharge hopper 23 extending into the interior of the impurity removal box 15 is installed at the lower end of the impurity removal box 15.

[0040] In this embodiment: the discharge hopper 23 at the lower end of the impurity removal box 15 extends into the box, which can guide the grains after impurity removal by the axial flow fan 16 to fall and be discharged in a concentrated manner, avoiding the accumulation of grains at the bottom of the impurity removal box 15, and collecting the grains using a collection and holding container.

[0041] As a technical optimization of this utility model, two protective mesh plates 17 are installed on the inner wall of the axial flow fan 16.

[0042] In this embodiment, the two protective mesh plates 17 on the inner wall of the axial flow fan 16 can block impurities generated during threshing from entering the fan, preventing impurities from entangled in the blades or damaging the fan components, and ensuring the long-term stable operation of the axial flow fan 16.

[0043] As a technical optimization of this utility model, guide blocks 4 are fixedly connected to both the left and right ends of the inner wall of the threshing box 2, and guide strips with triangular cross sections are fixedly connected to the upper ends of the two sealing blocks 13.

[0044] In this embodiment: the guide block 4 on the inner wall of the threshing box 2 can guide the material falling from the uniform roller 11 to ensure that it accurately enters the threshing area between the two rubber rollers 3; the triangular guide strip at the upper end of the blocking block 13 can guide the material falling from the feeding hopper 14 to gather in the groove of the uniform roller 11, avoiding the accumulation of material at the edge of the frame 10.

[0045] The working principle and usage process of this utility model are as follows: During operation, the rice seeds to be threshed are first fed into the feeding hopper 14, and the material enters the frame 10 through the feeding hopper 14. At this time, the first drive motor 12 starts and drives the uniform roller 11 to rotate. The grooves on the outer wall of the uniform roller 11 receive the material one by one as it rotates. Simultaneously, the sealing block 13 on the inner wall of the frame 10 forms a gap fit with the uniform roller 11, preventing material from leaking out from both sides, ensuring that the material falls evenly between the two rubber rollers 3 as the grooves rotate. This dynamic feeding method effectively improves the stability and uniformity of the feeding, avoiding situations where the feeding is not smooth.

[0046] Simultaneously, the second drive motor 9 in the drive mechanism starts, and its output drives the gear 7 connected to it to rotate. Since the two gears 7 are of different sizes and mesh with each other, they drive the two shafts 6 and the rubber rollers 3 fixed to them to rotate in opposite directions, creating a speed difference. When the material falls from the leveling roller 11 between the two rubber rollers 3, under the action of the reverse rotation of the rubber rollers 3 and the speed difference, the seeds are threshed through compression and friction. The guide block 4 on the inner wall of the threshing box 2 guides the falling material, ensuring that it accurately enters the working area of ​​the two rubber rollers 3.

[0047] After threshing, the grains and impurities fall onto the guide ramp 5 and slide into the impurity removal box 15. At this time, the axial flow fan 16 at the right end of the impurity removal box 15 starts, and the airflow it generates blows the light impurities in the mixture to the left. Under the action of the airflow, the impurities enter the L-shaped collection frame 19 through the opening on the left side of the impurity removal box 15. The filter cloth 20 inside the L-shaped collection frame 19 can intercept and collect the impurities, while the air can be discharged through the filter cloth 20. The rectangular sealing ring 18 on the left side of the impurity removal box 15 abuts against the L-shaped collection frame 19 to prevent impurities from leaking out from the gaps. During this process, the L-shaped collection frame 19 is positioned by the T-shaped limiting block 25 being inserted into the T-shaped limiting groove 24 on the base plate 1. At the same time, the electromagnet 21 on the left support plate is attracted to the iron disk 22 on the outer wall of the L-shaped collection frame 19 to ensure the stability of the L-shaped collection frame 19 during operation. This structural design facilitates the collection of blown-out impurities, eliminating the need for subsequent manual cleaning, reducing labor intensity and minimizing pollution to the working environment.

[0048] When it is necessary to remove the L-shaped collection frame 19, turn off the electromagnet 21 to release the fixation of the L-shaped collection frame 19, and then pull the L-shaped collection frame 19 to the left to make the T-shaped limiting block 25 disengage from the inside of the T-shaped limiting groove 24. Then tilt the L-shaped collection frame 19 to pour out the impurities inside from the opening of the L-shaped collection frame 19.

[0049] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An agricultural seed thresher, comprising a base plate (1), characterized in that: A threshing box (2) is provided above the base plate (1). Two rubber rollers (3) are rotatably connected inside the threshing box (2). An auxiliary feeding mechanism is provided above the two rubber rollers (3). A cleaning and collecting mechanism is provided below the two rubber rollers (3). A driving mechanism is provided on the rear side of the two rubber rollers (3). The auxiliary feeding mechanism includes a frame (10) that is fixedly connected to the upper end of the threshing box (2). A uniform roller (11) is rotatably connected inside the frame (10). The outer wall of the uniform roller (11) is provided with a plurality of grooves evenly distributed along the circumference. The left and right sides of the inner wall of the frame (10) are fixedly connected with a sealing block (13) that is clearance-fitted with the uniform roller (11). The outer wall of the frame (10) is equipped with a first drive motor (12) that is fixedly connected to the uniform roller (11). A feeding hopper (14) is installed at the upper end of the frame (10). The impurity removal and collection mechanism includes an impurity removal box (15) fixedly connected to the outer wall of the threshing box (2) and having an open structure on the left side. Guide inclined plates (5) are fixedly connected to both ends of the inner wall of the threshing box (2). An axial flow fan (16) is fixedly connected through the right end of the impurity removal box (15). An L-shaped collection frame (19) is provided on the upper side of the bottom plate (1). A rectangular sealing ring (18) that abuts against the right side of the L-shaped collection frame (19) is embedded in the left side of the impurity removal box (15) through a groove. An installation groove is provided through the left end of the L-shaped collection frame (19). A filter cloth (20) is installed inside the installation groove.

2. The agricultural seed thresher according to claim 1, characterized in that: The driving mechanism includes a driving frame (8) fixedly connected to the rear end of the threshing box (2), a shaft (6) fixedly connected to the rear end of each of the two rubber rollers (3), a gear (7) fixedly connected to the rear end of each of the two shafts (6), the two gears (7) being of different sizes and meshing with each other, and a second driving motor (9) with its output end fixedly connected to one of the gears (7) installed on the outer wall of the driving frame (8).

3. The agricultural seed thresher according to claim 1, characterized in that: The upper end of the base plate (1) is provided with a T-shaped limiting groove (24), and a T-shaped limiting block (25) fixedly connected to the L-shaped collection frame (19) is inserted into the T-shaped limiting groove (24).

4. The agricultural seed thresher according to claim 1, characterized in that: Two support plates are fixedly connected between the impurity removal box (15) and the base plate (1). An electromagnet (21) is installed at the left end of the left support plate. An iron disk (22) that attracts the electromagnet (21) is installed on the outer wall of the L-shaped collection frame (19).

5. An agricultural seed thresher according to claim 1, characterized in that: The lower end of the impurity removal box (15) is equipped with a discharge hopper (23) that extends into the interior of the impurity removal box (15).

6. The agricultural seed thresher according to claim 1, characterized in that: The inner wall of the axial flow fan (16) is equipped with two protective mesh plates (17).

7. The agricultural seed thresher according to claim 1, characterized in that: Guide blocks (4) are fixedly connected to both ends of the inner wall of the threshing box (2), and guide strips with triangular cross sections are fixedly connected to the upper ends of the two sealing blocks (13).

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