A seed metering device for agricultural seeders to prevent seed jamming and to clear blockages.

Abstract

This utility model relates to the field of seed metering anti-seed jamming technology, and discloses a seed metering device for agricultural seeders that prevents seed jamming and clears the obstruction. It includes a seed metering device and a seeding wheel. A seeding wheel, cylindrical in structure, is rotatably mounted at the center of the seed metering device's inner cavity. Several seed metering grooves are evenly distributed along the circumference of the seeding wheel. Each seed metering groove has a piston at its bottom for ejecting seeds stuck in it. A drive assembly is connected to the bottom of the piston. This utility model achieves automatic clearing of the seed metering grooves by having a slider slide along a guide groove on a disc as the seeding wheel rotates, driving a push rod to eject the stuck seeds. This avoids manual cleaning, improves work efficiency, and the structural design of the annular groove and rotating shaft ensures stable movement and precise guidance. A breaking plate at the seed inlet of the seed metering device, combined with a motor, pre-breaks seed clumps, reducing the source of seed jamming. Multiple anti-jamming measures ensure continuous and uniform sowing.

Description

Technical Field

[0001] This utility model belongs to the field of seed metering anti-jamming technology, specifically, it relates to a seed metering device for agricultural seeders that prevents seed jamming. Background Technology

[0002] In agricultural sowing operations, the seed metering device, as the core component of the seeder, directly affects the sowing quality and efficiency due to its seed metering accuracy and anti-clogging ability. Traditional seed metering devices typically use seed metering grooves on the circumference of the seeding wheel to collect seeds and rely on gravity or centrifugal force to achieve seed metering. However, in actual operation, uneven seed size, high moisture content, or the presence of clumps often cause seeds to get stuck in the seed metering grooves and fail to be discharged smoothly, resulting in sowing interruptions or uneven sowing rates.

[0003] During use, it was found that existing seed metering devices can reduce seed jamming by adding a stirring device or adjusting the shape of the seed metering trough, but they still lack effective active unblocking methods for local blockages in the seed metering trough. When seeds are tightly embedded at the bottom of the seed metering trough, it is difficult to remove the jammed seeds by relying solely on the centrifugal force of the rotating seeding wheel, requiring the machine to be stopped for manual cleaning, which affects the efficiency of operation.

[0004] In view of this, this utility model is hereby proposed. Utility Model Content

[0005] To address the issue that existing seed metering devices reduce seed jamming by adding stirring devices or adjusting the shape of the seed metering trough, but still lack effective active unblocking methods for localized blockages within the seed metering trough, and that when seeds are tightly embedded at the bottom of the seed metering trough, the centrifugal force of the rotating seeding wheel alone is insufficient to clear the jammed seeds, requiring manual cleaning and reducing operational efficiency, the basic concept of the technical solution adopted in this utility model is as follows:

[0006] A seed metering device for agricultural seeders includes a seed metering device and a seeding wheel. The seeding wheel is rotatably installed at the center of the inner cavity of the seed metering device. The seeding wheel has a cylindrical structure and a plurality of seed metering grooves are evenly distributed on the circumferential surface of the seeding wheel. Each seed metering groove has a piston installed at the bottom for ejecting seeds stuck in the seed metering groove. The bottom of the piston is connected to a drive assembly.

[0007] In a preferred embodiment of this utility model, the driving assembly includes a push rod, which is vertically connected to the center of the bottom of the piston. The axis of the push rod passes through the center of the seeding wheel. The push rod is slidably installed in the seeding wheel. A connecting rod is connected to the push rod, and a slider is connected to the end of each connecting rod. A disc is provided on the back of the seeding wheel, and a guide groove adapted to the slider is opened on the disc. The slider is installed in the guide groove.

[0008] In a preferred embodiment of this utility model, the seeding wheel is equipped with a rotating shaft, the disc is coaxially mounted with the seeding wheel, a through hole is provided at the center of the disc, and the rotating shaft is rotatably mounted in the through hole.

[0009] In a preferred embodiment of this utility model, the inner wall of the seed metering device is connected to two positioning rods, and the disc is radially provided with two positioning holes that are adapted to the positioning rods.

[0010] In a preferred embodiment of this utility model, an annular groove is provided on the seeding wheel, and a connecting rod is slidably installed in the annular groove.

[0011] In a preferred embodiment of this utility model, an output shaft is rotatably mounted at the seed inlet of the seed metering device, a dispersing plate is evenly distributed on the output shaft, and a motor is mounted at the end of the output shaft.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention utilizes the sliding motion of a slider along a circular guide groove as the seeding wheel rotates to drive a piston that ejects stuck seeds, thus automatically clearing the seed metering groove, avoiding manual cleaning, and improving work efficiency. The structural design of the annular groove and rotating shaft ensures stable movement and precise guidance. The seed dispersing plate at the seed inlet of the seed meterer, in conjunction with the motor, breaks up seed clumps in advance, reducing the source of seed jamming. Multiple anti-jamming measures ensure continuous and uniform sowing.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the installation of a seed metering device for an agricultural seeder to prevent seed jamming and to clear blockages.

[0017] Figure 2 This is a schematic diagram of the connection of a seed metering device for an agricultural seeder to prevent seed jamming and to clear any blockages.

[0018] Figure 3 A three-dimensional diagram of the seeding wheel and disc of a seed metering device for an agricultural seeder to prevent seed jamming and to clear blockages.

[0019] Figure 4 A schematic diagram of the internal structure of the seed wheel in a seed metering device for an agricultural seeder to prevent seed jamming;

[0020] Figure 5 A schematic diagram showing the connection between the top rod and the slider and the disc in a seed metering device for an agricultural seeder to prevent seed jamming;

[0021] Figure 6A three-dimensional diagram of the seeding wheel of a seed metering device for an agricultural seeder to prevent seed jamming and to clear blockages.

[0022] Figure 7 A three-dimensional diagram of a disc for an anti-jamming and seed-clearing device in an agricultural seeder.

[0023] In the diagram: 1. Seed metering device; 2. Seeding wheel; 3. Disc; 4. Through hole; 5. Positioning hole; 6. Positioning rod; 7. Rotating shaft; 8. Seed metering groove; 9. Piston; 10. Top rod; 11. Connecting rod; 12. Slider; 13. Guide groove; 14. Annular groove; 15. Output shaft; 16. Dispersing plate; 17. Motor. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0025] like Figures 1 to 7 As shown, an anti-seed jamming and seed clearing device for an agricultural seeder includes a seed metering device 1 and a seeding wheel 2. The seeding wheel 2 is rotatably mounted at the center of the inner cavity of the seed metering device 1. The seeding wheel 2 has a cylindrical structure, and several seed dispensing grooves 8 are evenly distributed circumferentially on its circumferential surface. Each seed dispensing groove 8 has a piston 9 installed at its bottom to eject seeds stuck in the seed dispensing groove 8. A drive assembly is connected to the bottom of the piston 9. In this configuration, the seed metering device 1 serves as the main body of the device, providing installation space for the seeding wheel 2, storing seeds internally, and guiding the seed dispensing process. The seeding wheel 2 rotates to circulate and discharge seeds in the seed dispensing grooves 8, making it the core moving component for sowing. The seed dispensing grooves 8 are evenly distributed on the circumferential surface of the seeding wheel 2 to accommodate seeds and control the seed dispensing position and quantity. The piston 9 is located at the bottom of the seed dispensing groove 8 and removes stuck seeds through its ejection action, serving as the direct execution component for clearing the seed dispensing groove 8.

[0026] like Figures 1 to 7As shown, in a specific embodiment, the driving assembly includes a push rod 10. The push rod 10 is vertically connected to the center of the bottom of the piston 9. The axis of the push rod 10 passes through the center of the seeding wheel 2. The push rod 10 is slidably installed in the seeding wheel 2. A connecting rod 11 is connected to the push rod 10, and a slider 12 is connected to the end of each connecting rod 11. A disc 3 is provided on the back of the seeding wheel 2. A guide groove 13 adapted to the slider 12 is opened on the disc 3, and the slider 12 is installed in the guide groove 13. In this configuration, the push rod 10 connects the piston 9 and the connecting rod 11, transmitting radial movement force and driving the piston 9 to reciprocate. The slider 12 is embedded in the guide groove 13 of the disc 3, and by sliding along the groove, the rotational motion of the seeding wheel 2 is converted into the radial motion of the push rod 10. The disc 3 is fixedly set, driving the piston 9 to periodically push out. The guide groove 13 is machined on the surface of the disc 3, which determines the movement path of the slider 12, thereby controlling the timing and stroke of the piston 9's push-out.

[0027] like Figures 1 to 7 As shown, furthermore, a rotating shaft 7 is assembled in the seeding wheel 2, and the disc 3 is coaxially mounted with the seeding wheel 2. A through hole 4 is opened at the center of the disc 3, and the rotating shaft 7 is rotatably installed in the through hole 4. In this configuration, the rotating shaft 7 passes through the center of the seeding wheel 2, serving as the rotation axis of the seeding wheel 2 and connecting to an external power source. The through hole 4 is opened at the center of the disc 3 and is clearance-fitted with the rotating shaft 7, allowing the seeding wheel 2 to rotate while keeping the disc 3 stationary.

[0028] like Figures 1 to 7 As shown, furthermore, two positioning rods 6 are connected to the inner wall of the seed metering device 1, and the disc 3 has two positioning holes 5 that are adapted to the positioning rods 6 along the radial direction. In this configuration, the positioning rods 6 are fixed to the inner wall of the seed metering device 1 and inserted into the positioning holes 5 of the disc 3 to ensure that the position of the disc 3 is fixed and does not rotate with the seeding wheel 2.

[0029] like Figures 1 to 7 As shown, the seeding wheel 2 is further provided with an annular groove 14, in which a connecting rod 11 is slidably installed. In this configuration, the annular groove 14 is located on the back of the seeding wheel 2, providing radial sliding space for the connecting rod 11 and reducing motion interference.

[0030] like Figures 1 to 7 As shown, furthermore, an output shaft 15 is rotatably mounted at the seed inlet of the seed metering device 1. Dispersing plates 16 are evenly distributed on the output shaft 15, and a motor 17 is mounted at the end of the output shaft 15. In this configuration, the output shaft 15 is installed at the seed inlet of the seed metering device 1 and is driven to rotate by the motor 17, which in turn drives the dispersing plates 16 to rotate. The dispersing plates 16 are evenly distributed on the output shaft 15, breaking up seed clumps through stirring and impact, reducing the source of seed jamming. The motor 17 provides power to the output shaft 15 and is the power source for the seed pretreatment stage.

[0031] The implementation principle of the seed metering device for an agricultural seeder in this embodiment is as follows: The seeding wheel 2 is installed in the center of the inner cavity of the seed metering device 1 via a rotating shaft 7 and rotates with the rotating shaft 7. When the seed metering groove 8 on its circumference rotates, it passes through the seed storage area, and the seeds fall into the seed metering groove 8 due to gravity. When the seed metering groove 8 rotates to the seed metering position, the seeds are discharged from the groove opening of the seed metering groove 8 to complete the sowing. The disc 3 is fixed to the seed metering device 1 by inserting the positioning rod 6 into the positioning hole 5 and does not rotate with the seeding wheel 2. When the seeding wheel 2 rotates, the slider 12 at the end of the connecting rod 11 slides along the inner wall of the guide groove 13. The curved trajectory of the guide groove 13 forces the slider 12 to drive the connecting rod 11 and the push rod 10 to move radially. The push rod 10 pushes the piston. The piston 9 moves outward from the seed metering trough 8, pushing out the seeds stuck in the seed metering trough 8. The annular groove 14 on the back of the seeding wheel 2 ensures the movement space of the connecting rod 11. The push rod 10 slides in the seeding wheel 2 to ensure that the slider 12 slides only along the axis of the push rod 10. The rotating shaft 7 is clearance-fitted with the through hole 4 of the disc 3, so that the disc 3 remains stationary when the seeding wheel 2 rotates, providing a fixed guiding reference for the guide groove 13. At the seed inlet of the seed metering device 1, the motor 17 drives the output shaft 15 and the dispersing plate 16 to rotate. Through stirring and striking, the seed clumps are broken and the seed is evenly distributed, reducing the probability of seed jamming in the seed metering trough 8 due to seed clumping. Combined with the ejection function of the piston 9, the seed jamming is prevented and the seed is unblocked, ensuring the continuity and uniformity of sowing.

Claims

1. A seed metering device for agricultural seeders to prevent seed jamming and to clear blockages, comprising a seed metering device (1) and a seeding wheel (2), characterized in that, The seed metering device (1) has a seeding wheel (2) rotatably installed at the center of its inner cavity. The seeding wheel (2) is a cylindrical structure. The circumferential surface of the seeding wheel (2) is evenly provided with several seeding grooves (8). Each seeding groove (8) has a piston (9) installed at the bottom for ejecting the seeds stuck in the seeding groove (8). The bottom of the piston (9) is connected to a drive assembly.

2. The seed metering device for an agricultural seeder according to claim 1, characterized in that, The drive assembly includes a push rod (10), which is vertically connected to the bottom center of the piston (9). The axis of the push rod (10) passes through the center of the seeding wheel (2). The push rod (10) is slidably installed in the seeding wheel (2). A connecting rod (11) is connected to the push rod (10). A slider (12) is connected to the end of the connecting rod (11). A disc (3) is provided on the back of the seeding wheel (2). A guide groove (13) adapted to the slider (12) is opened on the disc (3). The slider (12) is installed in the guide groove (13).

3. The seed metering device for an agricultural seeder according to claim 2, characterized in that, The seeding wheel (2) is equipped with a rotating shaft (7), the disc (3) is coaxially installed with the seeding wheel (2), and a through hole (4) is opened at the center of the disc (3). The rotating shaft (7) is rotatably installed in the through hole (4).

4. The seed metering device for an agricultural seeder according to claim 3, characterized in that, The seed meter (1) has two positioning rods (6) connected to its inner wall, and the disc (3) has two positioning holes (5) that are adapted to the positioning rods (6) in the radial direction.

5. The seed metering device for an agricultural seeder according to claim 1, characterized in that, The seeding wheel (2) has an annular groove (14) and a connecting rod (11) is slidably installed in the annular groove (14).

6. The seed metering device for an agricultural seeder according to claim 1, characterized in that, The seed metering device (1) has an output shaft (15) rotatably installed at the seed inlet. Dispersing plates (16) are evenly distributed on the output shaft (15), and a motor (17) is installed at the end of the output shaft (15).

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