Anti-blocking precision seed metering device

Abstract

The utility model relates to the technical field of seed precision seed metering device, disclose a kind of anti-clogging seed precision seed metering device, including seed metering device, the protective cover is rotatably connected in seed metering device outer wall, the adjusting plate is fixedly connected in seed metering device outer wall, the feeding cylinder is fixedly connected in seed metering device outer wall, the feeding cylinder inside is provided with the poking assembly, the poking assembly includes poking lever and adjusting lever, the adjusting lever outer wall is slidably connected in the feeding cylinder inside, the poking lever one side is arranged in the adjusting lever outer wall, adjusting lever inside is provided with adjusting assembly. In the utility model, the driving of eccentric wheel and gyro wheel is realized by motor, and cooperates with limiting block, realizes the sliding of poking lever in feeding cylinder inside, dynamic poking falling seed, without manual intervention, still can be adapted to different seeds by replacing eccentric wheel rotating speed, solve the problem that seed is easy to accumulate and block in feeding pipe, different seed adaptability is poor, improve the anti-clogging reliability of seed metering device and multi-class seed adaptability.

Description

Technical Field

[0001] This utility model relates to the field of precision seed metering devices, and in particular to a clogging-proof precision seed metering device. Background Technology

[0002] In modern large-scale agricultural planting, precision seed metering devices are core equipment for ensuring sowing quality and efficiency, and their performance directly affects crop emergence rate, yield per acre, and planting costs. With the improvement of agricultural mechanization and intelligence, farmers have placed higher demands on the anti-clogging capabilities, multi-crop adaptability, and automated operation of seed metering devices. Especially in the sowing of different types of seeds such as corn, soybeans, and wheat, the seed metering device needs to accurately control single-seed sowing while avoiding transport problems caused by differences in seed characteristics, in order to meet the needs of efficient and stable modern sowing operations. Therefore, an anti-clogging precision seed metering device has become a key focus of industry research and application.

[0003] Existing precision seed metering devices mostly employ a mechanical transmission seed metering structure. The core technology involves a seed metering wheel or disc located beneath the hopper to transport and separate seeds. The technical principle is as follows: the tractor's power take-off shaft drives the seed metering wheel to rotate. Grooves of a specific size are cut into the surface of the seed metering wheel. When the seed metering wheel rotates at the bottom of the hopper, seeds are embedded in the grooves and carried to the seed metering port. Excess seeds are then removed by a seed scraper, achieving precision seed metering. Some seed metering devices include a fixed stirring rod inside the hopper. The stirring rod is slightly vibrated by the seed metering wheel, assisting in seed descent. The entire system relies on rigid mechanical transmission to complete the seed metering operation, and does not incorporate dynamically adjustable lifting and actuating structures or hydraulically driven rotation structures.

[0004] Existing precision seed metering devices suffer from significant seed accumulation and clogging problems in practical operations. Due to the substantial differences in particle size, shape, and flowability among different seed varieties, the fixed structure of the seed metering wheel and stirring rod is difficult to adapt to all seed characteristics, and the fixed stirring rod cannot effectively break up the accumulated structure. When sowing small seeds such as wheat, uneven flow velocity within the feed pipe easily leads to localized stagnation, ultimately causing blockage. Blockage requires manual shutdown for cleaning, which not only affects sowing efficiency but also results in unseeded sections if not cleaned promptly, reducing crop yields. This problem has become a key bottleneck restricting the adaptability and operational stability of existing seed metering devices. Therefore, an anti-clogging precision seed metering device is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a seed precision metering device that prevents clogging, aiming to improve the problems of easy seed accumulation and clogging in the feed tube and poor compatibility with different seeds in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clogging-resistant precision seed metering device includes a seed metering device, a protective cover rotatably connected to the outer wall of the seed metering device, an adjusting plate fixedly connected to the outer wall of the seed metering device, and a feed cylinder fixedly connected to the outer wall of the seed metering device. An actuating component is provided inside the feed cylinder.

[0008] The actuating assembly includes a lever and an adjusting rod. The outer wall of the adjusting rod is slidably connected to the inside of the feed cylinder. One side of the lever is disposed on the outer wall of the adjusting rod. An adjusting assembly is disposed inside the adjusting rod. A rotating rod is rotatably connected inside the feed cylinder. A motor is fixedly connected to the outer wall of the feed cylinder. The output end of the motor is fixedly connected to one end of the rotating rod. An eccentric wheel is fixedly connected to the other end of the rotating rod. Two rollers are rotatably connected to the outer wall of the adjusting rod. The outer wall of the eccentric wheel is disposed between the two rollers. A limit assembly is disposed inside the feed cylinder.

[0009] As a further description of the above technical solution:

[0010] The limiting assembly includes a connecting rod and a limiting block. One side of the connecting rod is fixedly connected to the inner wall of the feed cylinder, the outer wall of the limiting block is fixedly connected to the other side of the connecting rod, and the outer wall of the adjusting rod is slidably connected to the outer wall of the adjusting rod.

[0011] As a further description of the above technical solution:

[0012] The adjustment component includes an adjustment tooth and a fixed tooth, wherein the adjustment tooth meshes with the fixed tooth.

[0013] As a further description of the above technical solution:

[0014] Multiple fixing blocks are fixedly connected to both sides of the adjusting rod, and a turntable is rotatably connected between two of the fixing blocks.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the adjusting tooth is fixedly connected to the outer wall of the turntable, and the outer wall of the turntable is fixedly connected to one side of the lever.

[0017] As a further description of the above technical solution:

[0018] The adjusting rod is slidably connected to a sliding plate, and the outer wall of the fixing tooth is fixedly connected to both sides of the sliding plate.

[0019] As a further description of the above technical solution:

[0020] A hydraulic rod is fixedly connected inside the adjusting rod, and the output end of the hydraulic rod is fixedly connected to the top of the slide plate.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the adjusting rod achieves its lifting and lowering function by starting a motor. When the motor is started, the motor drives the eccentric wheel and roller and cooperates with the limiting block to make the lever slide inside the feed cylinder, dynamically moving the falling seeds without manual intervention. It can also adapt to different seeds by changing the speed of the eccentric wheel, which solves the problems of easy accumulation and blockage of seeds in the feed pipe and poor compatibility of different seeds, and improves the anti-blocking reliability of the seed metering device and the compatibility of multiple types of seeds.

[0023] 2. In this utility model, the lever achieves its rotation function by activating the hydraulic rod. When the hydraulic rod is activated, it drives the fixed teeth and adjusting teeth and works in conjunction with the turntable to rotate the lever inside the feed cylinder. This eliminates the need to disassemble the equipment, allows for convenient adjustment, and adapts to different crop types. It also eliminates the need for repeated manual trial and error or replacement of the side rod, solving the problems of poor adaptability, cumbersome adjustment, and easy blockage caused by dead zones in the flow channel of traditional fixed side rods. This improves the scene adaptability and ease of operation of the seed metering device. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a clogging-resistant precision seed metering device proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the transmission rod of a seed precision metering device for preventing clogging, as proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the eccentric wheel of an anti-clogging precision seed metering device proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the adjusting rod of the anti-clogging precision seed metering device proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the lever structure of a seed precision metering device for preventing clogging proposed in this utility model.

[0029] Legend:

[0030] 1. Seed metering device; 2. Protective cover; 3. Feed cylinder; 4. Adjusting plate; 5. Motor; 6. Rotating rod; 7. Connecting rod; 8. Paddle lever; 9. Adjusting rod; 10. Limiting block; 11. Eccentric wheel; 12. Roller; 13. Fixing block; 14. Turntable; 15. Adjusting gear; 16. Slide plate; 17. Hydraulic rod; 18. Fixing gear. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-3 This utility model provides an embodiment of a precision seed metering device for preventing clogging, comprising a seed metering device 1. The seed metering device 1 is welded from high-strength Q235 steel plate and has an overall rectangular frame structure. The frame has reserved seed metering channels and transmission space to support various functional components and ensure stable operation of the sowing operation. A protective cover 2 is rotatably connected to the outer wall of the seed metering device 1, and an adjusting plate 4 is fixedly connected to the outer wall of the seed metering device 1. The adjusting plate 4 is made of 6061 aluminum alloy with an anodized surface and has a rectangular flat plate structure. Multiple sets of equally spaced oblong holes are opened on the plate for installing and fixing the seed metering device 1. Auxiliary components such as sensor brackets and pipeline clips can be flexibly adjusted in installation position through waist-shaped holes to adapt to the component layout requirements in different operating scenarios. The seed metering device 1 is fixedly connected to the outer wall of the feed cylinder 3, which is made of 304 stainless steel and has a funnel-shaped structure. It is used to store seeds to be sown. The funnel-shaped structure can use gravity to guide the seeds to fall naturally, avoiding local accumulation of seeds in the barrel. At the same time, the 304 stainless steel material has good corrosion resistance, which can prevent the seeds from sticking to the barrel wall after they get damp, ensuring the smooth delivery of seeds. The feed cylinder 3 is equipped with a toggle component inside.

[0033] The actuating assembly includes a lever 8 and an adjusting rod 9. The outer wall of the adjusting rod 9 is slidably connected to the inside of the feed cylinder 3. The adjusting rod 9 is made of 45# steel and is a cylindrical rod structure with a diameter of 20mm and a length of 300mm. Its outer wall is slidably connected to a pre-set sliding hole inside the feed cylinder 3 via a linear bearing. The linear bearing reduces the friction when the adjusting rod 9 slides, ensuring smooth and unobstructed lifting and lowering movement. One side of the lever 8 is located on the outer wall of the adjusting rod 9. An adjusting assembly is installed inside the adjusting rod 9. A rotating rod 6 is rotatably connected inside the feed cylinder 3. A motor 5 is fixedly connected to the outer wall of the feed cylinder 3. The output end of the motor 5 is fixedly connected to the rotating rod 6. An eccentric wheel 11 is fixedly connected to one end of the moving rod 6 and the other end of the rotating rod 6. The eccentric wheel 11 is made of No. 45 steel, has a disc-shaped structure, a diameter of 50 mm and an eccentricity of 8 mm, and is used to convert the rotational motion of the rotating rod 6 into the linear reciprocating motion of the adjusting rod 9. Two rollers 12 are rotatably connected to the outer wall of the adjusting rod 9. The outer wall of the eccentric wheel 11 is set between the two rollers 12. A limit assembly is set inside the feed cylinder 3. The limit assembly includes a connecting rod 7 and a limit block 10. One side of the connecting rod 7 is fixedly connected to the inner wall of the feed cylinder 3, and the outer wall of the limit block 10 is fixedly connected to the other side of the connecting rod 7. The outer wall of the adjusting rod 9 is slidably connected to the outer wall of the adjusting rod 9.

[0034] Reference Figures 3-5 The adjustment assembly includes an adjusting tooth 15 and a fixed tooth 18, both made of 45# steel. The tooth surfaces are carburized and quenched to a hardness of HRC55-60. Power transmission is achieved through tooth surface meshing, ensuring stability and accuracy during transmission and preventing adjustment jamming due to tooth profile errors. The adjusting tooth 15 meshes with the fixed tooth 18. Multiple fixed blocks 13 are fixedly connected to both sides of the adjusting rod 9. A turntable 14, with a disc-shaped structure and a diameter of 40 μm, is rotatably connected between two fixed blocks 13. The shaft is 8mm thick and has one side fixed to the inner ring of a deep groove ball bearing. The other side is fixedly connected to one side of the lever 8 by bolts. It is used to drive the lever 8 to rotate synchronously and realize the angle adjustment of the lever 8. The outer wall of the adjusting tooth 15 is fixedly connected to the outer wall of the turntable 14. The outer wall of the turntable 14 is fixedly connected to one side of the lever 8. The sliding plate 16 is slidably connected inside the adjusting rod 9. The outer wall of the fixing tooth 18 is fixedly connected to both sides of the sliding plate 16. The hydraulic rod 17 is fixedly connected inside the adjusting rod 9. The output end of the hydraulic rod 17 is fixedly connected to the top of the sliding plate 16.

[0035] Working Principle: When using the seed metering device 1 for precision seed metering, the seeds must first be fed into the feed cylinder 3. The large capacity of the feed cylinder 3 ensures a continuous seed supply, avoiding frequent refills that could interrupt the operation. Once the seeds enter the internal channel of the feed cylinder 3, to prevent blockage due to seed accumulation and adhesion, the motor 5 can be started immediately. The motor 5, as a power source, stably outputs torque to drive the rotating rod 6 to rotate at a set speed. The rotating rod 6 and the eccentric wheel 11 are connected and fixed by a key. As the rotating rod 6 rotates, the eccentric wheel 11 rotates synchronously. Due to the eccentric structure of the eccentric wheel 11, its outer wall remains in close contact with the roller 12 and rolls relative to it. During the rotation of the eccentric wheel 11, it continuously generates periodic pushing and pulling forces on the roller 12.

[0036] Roller 12 and adjusting rod 9 are hinged by a pin. Driven by eccentric wheel 11, roller 12 drives adjusting rod 9 to slide back and forth along the slide rail inside limiting block 10. Limiting block 10 can precisely limit the sliding trajectory of adjusting rod 9 and prevent it from deviating and causing the component to jam. The other end of adjusting rod 9 is rigidly connected to lever 8. As adjusting rod 9 slides, lever 8 moves up and down synchronously. The silicone paddle at the end of lever 8 can penetrate into the seed flow channel of material cylinder 3 to dynamically move the falling seeds, break up the accumulated seed clumps, avoid blockage from the source, and ensure that the seed conveying channel is unobstructed.

[0037] Furthermore, when it is necessary to change to different types and sizes of seeds for seed metering operations, the equipment can be directly activated without disassembling the device. The hydraulic rod 17 provides stable thrust output, enabling the fixed slide plate 16 to move smoothly horizontally. The symmetrically mounted fixing teeth 18 on both sides of the slide plate 16 move synchronously with it. The fixing teeth 18 mesh with the adjusting teeth 15 on the edge of the turntable 14. During the movement of the fixing teeth 18, the turntable 14 rotates around the outer wall of the fixing block 13 via inter-tooth transmission. The fixing block 13 provides stable support for the turntable 14, ensuring no deviation during rotation. The turntable 14 and the lever 8 are fixed together by a connector. As the turntable 14 rotates, the angle and amplitude of the lever 8 are adjusted accordingly, precisely adapting to the characteristics of different seeds such as corn, soybeans, and wheat. This achieves efficient and adaptable seed metering, further enhancing the operational flexibility and applicability of the seed metering device 1.

Claims

1. A clogging-resistant precision seed metering device, comprising a seed metering device (1), characterized in that: The seed metering device (1) is rotatably connected to a protective cover (2), the seed metering device (1) is fixedly connected to an adjusting plate (4), the seed metering device (1) is fixedly connected to an infeed cylinder (3), and an actuating component is provided inside the infeed cylinder (3). The actuating assembly includes a lever (8) and an adjusting rod (9). The outer wall of the adjusting rod (9) is slidably connected to the inside of the feed cylinder (3). One side of the lever (8) is disposed on the outer wall of the adjusting rod (9). An adjusting assembly is disposed inside the adjusting rod (9). A rotating rod (6) is rotatably connected inside the feed cylinder (3). A motor (5) is fixedly connected to the outer wall of the feed cylinder (3). The output end of the motor (5) is fixedly connected to one end of the rotating rod (6). An eccentric wheel (11) is fixedly connected to the other end of the rotating rod (6). Two rollers (12) are rotatably connected to the outer wall of the adjusting rod (9). The outer wall of the eccentric wheel (11) is disposed between the two rollers (12). A limit assembly is disposed inside the feed cylinder (3).

2. The anti-clogging precision seed metering device according to claim 1, characterized in that: The limiting assembly includes a connecting rod (7) and a limiting block (10). One side of the connecting rod (7) is fixedly connected to the inner wall of the feed cylinder (3), and the outer wall of the limiting block (10) is fixedly connected to the other side of the connecting rod (7). The outer wall of the adjusting rod (9) is slidably connected to the outer wall of the adjusting rod (9).

3. The anti-clogging precision seed metering device according to claim 2, characterized in that: The adjustment assembly includes an adjustment tooth (15) and a fixed tooth (18), wherein the adjustment tooth (15) meshes with the fixed tooth (18).

4. The anti-clogging precision seed metering device according to claim 3, characterized in that: Multiple fixing blocks (13) are fixedly connected to both sides of the adjusting rod (9), and a turntable (14) is rotatably connected between the two fixing blocks (13).

5. A seed precision metering device for preventing clogging according to claim 4, characterized in that: The outer wall of the adjusting tooth (15) is fixedly connected to the outer wall of the turntable (14), and the outer wall of the turntable (14) is fixedly connected to one side of the lever (8).

6. A precision seed metering device for preventing clogging according to claim 5, characterized in that: The adjusting rod (9) is slidably connected to the slide plate (16), and the outer wall of the fixing tooth (18) is fixedly connected to both sides of the slide plate (16).

7. A seed precision metering device for preventing clogging according to claim 6, characterized in that: The adjusting rod (9) is internally fixedly connected to a hydraulic rod (17), and the output end of the hydraulic rod (17) is fixedly connected to the top of the sliding plate (16).

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