Adjustable plant spacing negative pressure adsorption seed metering device

Abstract

The utility model discloses a kind of negative pressure adsorption type seed metering device of adjustable plant spacing, it is related to negative pressure adsorption type seed metering device field, including shell body, the front end of shell body is fixedly connected with connecting rod, the front end of connecting rod is fixedly connected with U type connecting frame, the upper end of shell body is fixedly connected with first seed storage box, the inner chamber of shell body is provided with multiple mounting blocks, multiple The mounting block is slidably connected in the inner chamber of shell body, the utility model is provided with a kind of negative pressure adsorption type seed metering device of adjustable plant spacing, when working, electric telescopic rod is rotated by upper rotating seat, lower rotating seat respectively drives first shear bar group, second shear bar group, in combination upper rotating shaft, lower rotating shaft and the sliding fit of mounting block, and the spacing of the limiting guide of multiple mounting blocks synchronous even sliding, further adjusting the spacing between multiple adsorption type seed metering device body.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure adsorption seed metering devices, and in particular to a negative pressure adsorption seed metering device with adjustable plant spacing. Background Technology

[0002] In agricultural sowing operations, negative pressure adsorption seed metering devices are widely used in planting scenarios for various crops such as corn, soybeans, and vegetables due to their significant advantages of minimal seed damage and high seed metering accuracy, and have become an important component of modern agricultural sowing equipment. However, existing negative pressure adsorption seed metering devices suffer from insufficient flexibility in adjusting plant spacing in practical applications. Most devices adopt a fixed installation structure, with the spacing of the adsorption seed metering device body remaining constant. This makes it impossible to adapt to the planting density requirements of different crops. Even the few adjustable models require cumbersome manual disassembly and reassembly to change the spacing, resulting in low adjustment efficiency and poor accuracy. This makes it difficult to meet the needs of large-scale, precision sowing operations for flexible plant spacing adjustment. Secondly, although some seed metering devices have basic adjustment functions, they lack effective buffer and anti-collision structures when the adsorption seed metering device body and its supporting mounting blocks move during the adjustment process. When the components approach the inner wall of the outer shell, direct collisions can easily occur, leading to deformation of the mounting blocks and damage to the seed metering device body, severely shortening the equipment's service life. To solve the above problems, we propose a negative pressure adsorption seed metering device with adjustable plant spacing. Utility Model Content

[0003] The main purpose of this invention is to provide a negative pressure adsorption seed metering device with adjustable plant spacing, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An adjustable-spacing negative pressure adsorption seed metering device includes an outer shell. A connecting rod is fixedly connected to the front end of the outer shell, and a U-shaped connecting frame is fixedly connected to the front end of the connecting rod. A first seed storage box is fixedly connected to the upper end of the outer shell. Multiple mounting blocks are provided in the inner cavity of the outer shell, and the multiple mounting blocks are slidably connected to the inner cavity of the outer shell. An adsorption seed metering device body is installed at the lower end of each of the multiple mounting blocks. A second seed storage box is provided on one side of the adsorption seed metering device body. A seed-dropping tube, which is fixedly connected to the upper end of the second seed storage box and is fixedly connected to the mounting block, is fixedly connected to the upper end of the seed-dropping tube. The elastic telescopic tube is fixedly connected to the lower end of the first seed storage box. An anti-collision component is also provided on the inner wall of the outer shell. A contact plate is provided on the side of the mounting block closest to the anti-collision component, and the contact plate is adapted to the anti-collision component.

[0005] Preferably, an upper rotating shaft and a lower rotating shaft are slidably connected to the inner side of each of the plurality of mounting blocks, the upper rotating shaft being located above the lower rotating shaft, and a first scissor bar group and a second scissor bar group are rotatably connected to the outer side of each of the plurality of upper rotating shafts and lower rotating shafts, and each group of the first scissor bar group and the second scissor bar group are also rotatably connected to each other.

[0006] Preferably, an electric telescopic rod is slidably installed on the inner wall of the outer casing. The electric telescopic rod is located on the side away from the anti-collision component. An upper rotating seat is fixedly connected to the output end of the electric telescopic rod. The upper rotating seat is rotatably connected to the upper end of the corresponding first scissor bar assembly. A lower rotating seat is fixedly connected to the lower end of the electric telescopic rod. The lower rotating seat is rotatably connected to the lower end of the corresponding second scissor bar assembly.

[0007] Preferably, each group of first and second scissor bar groups is rotatably connected to a central rotating shaft, and limit components are provided at both ends of the central rotating shaft.

[0008] Preferably, the limiting component includes a guide rail seat, and a slide rail corresponding to the guide rail seat is fixedly connected to the inner wall of the outer shell, and the guide rail seat is slidably connected to the outer side of the slide rail.

[0009] Preferably, a rotating sleeve is rotatably connected to the outer side of both the upper and lower rotating shafts. A guide telescopic rod is fixedly connected to one end of each of the two rotating sleeves. The other end of the guide telescopic rod is fixedly connected to the mounting block. A first spring is sleeved on the outer side of the guide telescopic rod. The two ends of the first spring are also fixedly connected to the rotating sleeve and the mounting block, respectively.

[0010] Preferably, connecting blocks are fixedly connected to both the front and rear ends of the contact plate, and the two connecting blocks are fixedly connected to the corresponding guide rail seats.

[0011] Preferably, the anti-collision component includes a first mounting plate, which is fixedly connected to the inner wall of the outer shell. Guide rods are fixedly connected to the four corners of the outer side of the first mounting plate. A second mounting plate is sleeved on the outer side of the four guide rods. The second mounting plate is adapted to the impact plate.

[0012] Preferably, a second spring is sleeved on the outer side of the guide rod, and the two ends of the second spring are fixedly connected to the first mounting plate and the second mounting plate, respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This adjustable-plant-spacing negative pressure adsorption seed metering device, during operation, uses an electric telescopic rod to drive the first and second scissor bar groups to rotate via the upper and lower rotating seats respectively. Combined with the sliding cooperation between the upper and lower rotating shafts and the mounting blocks, and the limiting guidance of the middle rotating shaft and guide rail seat along the slide rail, multiple mounting blocks can be driven to slide synchronously and uniformly, thereby adjusting the spacing between multiple adsorption seed metering device bodies. This improves efficiency and ensures accuracy, adapting to different planting density requirements for crops such as corn, soybeans, and vegetables, and meeting the requirements of large-scale and precise sowing. At the same time, the guide telescopic rods and the first spring on the outside of the upper and lower rotating shafts can buffer and guide the movement of the mounting blocks, ensuring that the height of the adsorption seed metering device body remains constant, further guaranteeing seed metering stability. 2. This adjustable plant spacing negative pressure adsorption seed metering device, when the mounting block moves the adsorption seed metering device body close to the inner wall of the outer shell, the contact plate will first contact the second mounting plate of the anti-collision component. As the contact plate continues to move with the mounting block, the contact plate will push the second mounting plate to slide along the guide rod and compress the second spring. The elastic deformation of the spring absorbs the impact force, avoids the mounting block from colliding hard with the inner wall of the outer shell, prevents the mounting block from deforming and the seed metering device body from being damaged, extends the equipment life and reduces maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a negative pressure adsorption seed metering device with adjustable plant spacing according to this utility model. Figure 2 This is a cross-sectional view of the overall structure of a negative pressure adsorption seed metering device with adjustable plant spacing according to this utility model. Figure 3 This is a partial structural diagram of a negative pressure adsorption seed metering device with adjustable plant spacing according to this utility model. Figure 4 This is a partially exploded cross-sectional view of the adjustable plant spacing negative pressure adsorption seed metering device of this utility model. Figure 5 This is a schematic diagram of the anti-collision component structure of an adjustable plant spacing negative pressure adsorption seed metering device according to the present invention. Figure 6 This is an enlarged structural diagram of point A of the adjustable plant spacing negative pressure adsorption seed metering device of this utility model.

[0015] In the diagram: 1. Outer shell; 2. First seed storage box; 3. U-shaped connecting frame; 4. Connecting rod; 5. Electric telescopic rod; 7. Upper rotating seat; 8. Lower rotating seat; 9. First scissor bar assembly; 10. Second scissor bar assembly; 11. Middle rotating shaft; 12. Upper rotating shaft; 13. Lower rotating shaft; 14. Mounting block; 15. Rotating sleeve; 16. Guide telescopic rod; 17. First spring; 18. Adsorption-type seed metering device body; 19. Second seed storage box; 20. Seed feeding tube; 21. Elastic telescopic tube; 22. Guide rail seat; 23. Slide rail; 24. Connecting block; 25. Contact plate; 26. First mounting plate; 27. Guide rod; 28. Second spring; 29. ​​Second mounting plate. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1-6 As shown, an adjustable plant spacing negative pressure adsorption seed metering device includes an outer shell 1. A connecting rod 4 is fixedly connected to the front end of the outer shell 1, and a U-shaped connecting frame 3 is fixedly connected to the front end of the connecting rod 4. A first seed storage box 2 is fixedly connected to the upper end of the outer shell 1. Multiple mounting blocks 14 are provided in the inner cavity of the outer shell 1. The multiple mounting blocks 14 are slidably connected to the inner cavity of the outer shell 1. An adsorption seed metering device body 18 is installed at the lower end of each of the multiple mounting blocks 14. A second seed storage box 19 is provided on one side of the adsorption seed metering device body 18. A seed lowering tube 20, which is fixedly connected to the mounting block 14, is fixedly connected to the upper end of the seed lowering tube 20. An elastic telescopic tube 21 is fixedly connected to the upper end of the seed lowering tube 20. The elastic telescopic tube 21 is fixedly connected to the lower end of the first seed storage box 2. An anti-collision component is also provided on the inner wall of the outer shell 1. A contact plate 25 is provided on the side of the mounting block 14 closest to the anti-collision component. The contact plate 25 is adapted to the anti-collision component.

[0018] In this embodiment, an upper rotating shaft 12 and a lower rotating shaft 13 are slidably connected to the inner sides of multiple mounting blocks 14. The upper rotating shaft 12 is located above the lower rotating shaft 13. A first scissor bar group 9 and a second scissor bar group 10 are rotatably connected to the outer sides of the multiple upper rotating shafts 12 and lower rotating shafts 13, and each first scissor bar group 9 and second scissor bar group 10 is also rotatably connected to each other. An electric telescopic rod 5 is slidably installed on the inner wall of the outer shell 1. The electric telescopic rod 5 is located on the side away from the anti-collision component, and the output end of the electric telescopic rod 5 is fixedly connected to an upper rotating seat 7. The upper rotating seat 7 is rotatably connected to the upper end of the corresponding first scissor bar group 9. The lower end of the electric telescopic rod 5 is fixedly connected to the lower rotating seat 8. The lower rotating seat 8 is rotatably connected to the lower end of the corresponding second scissor bar group 10. A middle rotating shaft 11 is rotatably connected between each first scissor bar group 9 and the second scissor bar group 10. Limiting components are provided at both ends of the middle rotating shaft 11. The limiting components include guide rail seats 22. A slide rail 23 corresponding to the guide rail seat 22 is fixedly connected to the inner wall of the outer shell 1. The guide rail seat 22 is slidably connected to the outside of the slide rail 23.

[0019] Specifically, during operation, the U-shaped connecting frame 3, connected to the connecting rod 4 at the front end of the outer shell 1, is first assembled and fixed with the externally driven sowing equipment. The first seed storage box 2 at the upper end stores the seeds to be sown, providing seeds for the sowing operation. When adjusting the plant spacing, the electric telescopic rod 5 on the inner wall of the outer shell 1 is activated. The upper rotating seat 7 fixedly connected to the upper end of the electric telescopic rod 5 will drive the upper end of the corresponding first scissor bar group 9 to rotate. The lower rotating seat 8 fixedly connected to the lower end of the electric telescopic rod 5 will drive the lower end of the corresponding second scissor bar group 10 to rotate. Because the upper rotating shaft 12 and the lower rotating shaft 13 are slidably connected to the inner side of multiple mounting blocks 14, and the outer sides of the upper rotating shaft 12 and the lower rotating shaft 13 are respectively rotatably connected to the first scissor bar group 9 and the second scissor bar group 10, and each group of first scissor bar group 9 and second scissor bar group 10 is also connected to the middle rotating shaft 11, and the guide rail seats 22 fixedly connected to both ends of the middle rotating shaft 11 slide along the slide rail 23 on the inner wall of the outer shell 1 to achieve limit guidance, the electric telescopic rod 5 will drive the mounting blocks 14 to slide outward synchronously when it retracts.

[0020] More specifically, the electric telescopic pole 5 in this solution is a commercially available device that can be purchased by those skilled in the art. No structural modifications have been made to the device in this paper. Therefore, those skilled in the art are familiar with its working principle based on their professional knowledge and can apply it proficiently. This paper will not elaborate further on this aspect. Furthermore, this solution aims to protect the physical structure, not the circuitry or software control. The mention of the processing circuit in this paper is merely a supplementary explanation of the feasibility and authenticity of this utility model. This utility model does not seek protection for the algorithm and circuitry technology. It is worth emphasizing that although the electronic control program is not described in detail in this solution, those skilled in the art can be familiar with and apply it based on their professional knowledge.

[0021] In this embodiment, rotating sleeves 15 are rotatably connected to the outer sides of the upper rotating shaft 12 and the lower rotating shaft 13. A guide telescopic rod 16 is fixedly connected to one end of the two rotating sleeves 15 facing each other. The other end of the guide telescopic rod 16 is fixedly connected to the mounting block 14. A first spring 17 is sleeved on the outer side of the guide telescopic rod 16. The two ends of the first spring 17 are also fixedly connected to the rotating sleeve 15 and the mounting block 14 respectively.

[0022] Specifically, the guide telescopic rod 16 and the outer first spring 17, connected by the outer rotating sleeve 15 of the upper rotating shaft 12 and the lower rotating shaft 13, can buffer and guide the movement of the mounting block 14 to ensure its height is constant. Finally, the spacing of the lower adsorption seed metering device body 18 can be adjusted by moving the mounting block 14 to achieve plant spacing adjustment.

[0023] In this embodiment, connecting blocks 24 are fixedly connected to both the front and rear ends of the impact plate 25. The two connecting blocks 24 are fixedly connected to the corresponding guide rail seats 22. The anti-collision component includes a first mounting plate 26, which is fixedly connected to the inner wall of the outer shell 1. Guide rods 27 are fixedly connected to the four corners of the outer side of the first mounting plate 26. A second mounting plate 29 is sleeved on the outer side of the four guide rods 27. The second mounting plate 29 is adapted to the impact plate 25. A second spring 28 is sleeved on the outer side of the guide rods 27. The two ends of the second spring 28 are fixedly connected to the first mounting plate 26 and the second mounting plate 29, respectively.

[0024] Specifically, when the mounting block 14 moves the adsorption seed metering device body 18 closer to the anti-collision component, the mounting block 14 close to the anti-collision component, through the connecting block 24 and the guide rail seat 22, is connected to the contact plate 25, which first contacts the second mounting plate 29 of the anti-collision component. When the mounting block 14 close to the anti-collision component continues to move, the contact plate 25 pushes the second mounting plate 29 to slide along the guide rod 27 on the first mounting plate 26, compressing the second spring 28 on the outside of the guide rod 27. At this time, the spring elastic deformation buffers the anti-collision, which can avoid the mounting block 14 from directly colliding and being damaged by the inner wall of the outer shell 1. In the seed metering operation, the seeds in the first seed storage box 2 are transported to the second seed storage box 19 on one side of the adsorption seed metering device body 18 through the elastic telescopic tube 21 and the seeding tube 20. At this time, the adsorption seed metering device body 18 adsorbs the seeds by negative pressure, and releases them after reaching the designated sowing position, thereby completing the precise seed metering.

[0025] It should be noted that this utility model is a negative pressure adsorption seed metering device with adjustable plant spacing. During operation, the U-shaped connecting frame 3, connected to the connecting rod 4 at the front end of the outer shell 1, is first assembled and fixed to the external driving sowing equipment. The first seed storage box 2 at its upper end stores seeds to be sown, supplying seeds for the sowing operation. When adjusting the plant spacing, the electric telescopic rod 5 on the inner wall of the outer shell 1 is activated. The upper rotating seat 7, fixedly connected to the upper end of the electric telescopic rod 5, will drive the upper end of the corresponding first scissor bar group 9 to rotate. The lower rotating seat 8, fixedly connected to the lower end of the electric telescopic rod 5, will drive the corresponding second scissor bar group... The lower end of 10 rotates because the upper rotating shaft 12 and the lower rotating shaft 13 are slidably connected to the inner side of multiple mounting blocks 14, and the outer sides of the upper rotating shaft 12 and the lower rotating shaft 13 are rotatably connected to the first scissor bar group 9 and the second scissor bar group 10 respectively. At the same time, each group of the first scissor bar group 9 and the second scissor bar group 10 are also connected to each other through the middle rotating shaft 11. The guide rail seats 22 fixedly connected to both ends of the middle rotating shaft 11 slide along the slide rail 23 on the inner wall of the outer shell 1 to achieve limit guidance. Therefore, when the electric telescopic rod 5 retracts, it will drive the mounting blocks 14 to slide outward synchronously. In addition, the upper rotating shaft 12, The guide telescopic rod 16 and the outer first spring 17 connected to the outer rotating sleeve 15 of the lower rotating shaft 13 can buffer and guide the movement of the mounting block 14 to ensure its height is constant. Finally, the spacing of the lower adsorption seed metering device body 18 is adjusted by moving the mounting block 14 to achieve plant spacing adjustment. When the mounting block 14 moves the adsorption seed metering device body 18 closer to the anti-collision component, the mounting block 14 close to the anti-collision component, through the contact plate 25 connected by the connecting block 24 and the guide rail seat 22, first contacts the second mounting plate 29 of the anti-collision component. When the mounting block 14 close to the anti-collision component continues to move, The contact plate 25 pushes the second mounting plate 29 to slide along the guide rod 27 on the first mounting plate 26, compressing the second spring 28 on the outside of the guide rod 27. At this time, the elastic deformation of the spring is used to buffer the impact, which can avoid direct collision and damage between the mounting block 14 and the inner wall of the outer shell 1. During the seed metering operation, the seeds in the first seed storage box 2 are transported to the second seed storage box 19 on one side of the adsorption seed metering device body 18 through the elastic telescopic tube 21 and the seeding tube 20. At this time, the adsorption seed metering device body 18 adsorbs the seeds through negative pressure and releases them after reaching the designated sowing position, thereby completing precise seed metering, which is quite practical.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A negative pressure adsorption seed metering device with adjustable plant spacing, comprising an outer shell (1), characterized in that: A connecting rod (4) is fixedly connected to the front end of the outer shell (1), and a U-shaped connecting frame (3) is fixedly connected to the front end of the connecting rod (4). A first seed storage box (2) is fixedly connected to the upper end of the outer shell (1). A plurality of mounting blocks (14) are provided in the inner cavity of the outer shell (1). The plurality of mounting blocks (14) are slidably connected to the inner cavity of the outer shell (1). An adsorption seed metering device body (18) is installed at the lower end of the plurality of mounting blocks (14). A second seed storage box (19) is provided on one side of the adsorption seed metering device body (18). The upper end of the second seed storage box (19) is fixedly connected to a seeding tube (20) which is fixedly connected to the mounting block (14). The upper end of the seeding tube (20) is fixedly connected to an elastic telescopic tube (21). The elastic telescopic tube (21) is fixedly connected to the lower end of the first seed storage box (2). An anti-collision component is also provided on the inner wall of the outer shell (1). A contact plate (25) is provided on the side of the mounting block (14) closest to the anti-collision component among the plurality of mounting blocks (14). The contact plate (25) is adapted to the anti-collision component.

2. The adjustable spacing negative pressure adsorption type seed meter according to claim 1, characterized in that: The inner sides of the plurality of mounting blocks (14) are slidably connected to an upper rotating shaft (12) and a lower rotating shaft (13). The upper rotating shaft (12) is located above the lower rotating shaft (13). The outer sides of the plurality of upper rotating shafts (12) and lower rotating shafts (13) are rotatably connected to a first scissor bar group (9) and a second scissor bar group (10), and each group of the first scissor bar group (9) and the second scissor bar group (10) is also rotatably connected to each other.

3. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 2, characterized in that: An electric telescopic rod (5) is slidably installed on the inner wall of the outer shell (1). The electric telescopic rod (5) is located on the side away from the anti-collision component. An upper rotating seat (7) is fixedly connected to the output end of the electric telescopic rod (5). The upper rotating seat (7) is rotatably connected to the upper end of the corresponding first scissor bar group (9). A lower rotating seat (8) is fixedly connected to the lower end of the electric telescopic rod (5). The lower rotating seat (8) is rotatably connected to the lower end of the corresponding second scissor bar group (10).

4. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 2, characterized in that: Each group of first scissor bar groups (9) and second scissor bar groups (10) is rotatably connected to a central rotating shaft (11), and the front and rear ends of the central rotating shaft (11) are provided with limit components.

5. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 4, characterized in that: The limiting component includes a guide rail seat (22), and a slide rail (23) corresponding to the guide rail seat (22) is fixedly connected to the inner wall of the outer shell (1). The guide rail seat (22) is slidably connected to the outside of the slide rail (23).

6. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 2, characterized in that: Rotating sleeves (15) are rotatably connected to the outer sides of the upper rotating shaft (12) and the lower rotating shaft (13). A guide telescopic rod (16) is fixedly connected to one end of each of the two rotating sleeves (15). The other end of the guide telescopic rod (16) is fixedly connected to the mounting block (14). A first spring (17) is sleeved on the outer side of the guide telescopic rod (16). The two ends of the first spring (17) are also fixedly connected to the rotating sleeve (15) and the mounting block (14) respectively.

7. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 5, characterized in that: Both ends of the contact plate (25) are fixedly connected to connecting blocks (24), and the two connecting blocks (24) are fixedly connected to the guide rail seat (22) respectively.

8. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 1, characterized in that: The anti-collision component includes a first mounting plate (26), which is fixedly connected to the inner wall of the outer shell (1). Guide rods (27) are fixedly connected to the four corners of the outer side of the first mounting plate (26). A second mounting plate (29) is sleeved on the outer side of the four guide rods (27). The second mounting plate (29) is adapted to the impact plate (25).

9. The adjustable-stalk-spacing negative pressure adsorption type seed meter according to claim 8, characterized in that: A second spring (28) is sleeved on the outside of the guide rod (27), and the two ends of the second spring (28) are fixedly connected to the first mounting plate (26) and the second mounting plate (29) respectively.

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