Vacuum adsorption seed metering structure

Abstract

The utility model provides a vacuum adsorption seed metering structure and relates to the technical field of seed metering devices. Comprising a seed box used for containing seeds, and further comprises a seed suction device provided with a plurality of negative pressure seed suction parts in the circumferential direction, and the seed suction device is connected with a negative pressure device so as to generate negative pressure in the negative pressure seed suction parts; the seed suction device is rotationally arranged on one side of the seed box, so that seeds in the seed box are sucked to the negative pressure seed suction part one by one when the negative pressure seed suction part rotationally passes through the seed box; a hole blocking assembly is arranged in the seed suction device, and the hole blocking assembly is suitable for acting below the seed suction device so as to cut off the negative pressure of the corresponding negative pressure seed suction part when the negative pressure seed suction part rotates and passes through, so that the seeds adsorbed on the corresponding negative pressure seed suction part fall off. By means of the scheme, the seed metering efficiency can be improved, and damage to seeds is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seeding devices, in particular to a vacuum adsorption seeding structure. Background Art

[0002] Existing seeding devices can be divided into two categories: one is that due to the simple internal structure and the small seeds are usually small in size and light in weight, they are easily affected by factors such as airflow and vibration during the seeding process, resulting in a decrease in sowing accuracy, uneven sowing density, and affecting crop yield and quality; the other is that during the seeding process, small seeds may be subjected to mechanical effects such as extrusion and friction, resulting in seed damage, which in turn affects crop yield. For example, patent CN202320100972.2 discloses a scheme for simply adsorbing seeds using a seeding device, but its internal structure is simple, the seeding device is large in size, and the absorbed seeds are inconvenient for subsequent processing. The vacuum seeding device disclosed in patent CN202123294481.6 is large in size and weight, and is not convenient for assembly with other mechanisms. Patent CN202322655492.5 discloses a scheme for adsorbing seeds using an air suction roller on one side alone, but relatively speaking, such a structure is simple, but it cannot really improve the precision sowing rate of seeds. Patent CN202310601098.5 discloses a solution for adsorbing seeds using a simple air-suction seeding device, but its seeding efficiency is limited. Utility Model Content

[0003] The utility model discloses a vacuum adsorption seeding structure, aiming to solve the above-mentioned technical problems.

[0004] The utility model adopts the following scheme:

[0005] A vacuum adsorption seeding structure comprises a seed box for containing seeds, and also comprises: a seed absorber provided with a plurality of negative pressure seed absorption parts along a circumferential direction, and the seed absorber is connected with a negative pressure device to generate negative pressure in the negative pressure seed absorption part; the seed absorber is rotatably arranged on one side of the seed box so that when the negative pressure seed absorption part rotates through the seed box, the seeds in the seed box are absorbed one by one at the negative pressure seed absorption part; a hole blocking component is arranged in the seed absorber, and the hole blocking component is suitable for cutting off the negative pressure suction force of the corresponding negative pressure seed absorption part when the negative pressure seed absorption part rotates through the bottom thereof, so that the seeds absorbed on the negative pressure seed absorption part fall off.

[0006] Preferably, the seed absorber is configured to be cylindrical, and a rotating shaft is provided in the direction of its central axis; an intermediate shaft hole is provided on the rotating shaft for connecting a negative pressure device.

[0007] Preferably, the hole blocking assembly includes a connecting piece, a pull rod, a rubber pressure wheel and a tension spring, the connecting piece connects one end of the pull rod with the rotating shaft, the other end of the pull rod is connected to the rubber pressure wheel, and the tension spring acts on the pull rod to make the rubber pressure wheel press the negative pressure seed suction part inside the seed suction device.

[0008] Preferably, the plurality of negative pressure seed suction parts are evenly distributed along the circumferential direction of the seed suction device.

[0009] Preferably, each of the negative pressure seed suction parts comprises at least one negative pressure hole, and the number of seeds that can be absorbed by each negative pressure seed suction part is controlled by controlling the number of the negative pressure holes.

[0010] Preferably, the angle between the line connecting the center of the rubber hole pressing wheel and the center of the seed metering device and the vertical direction at the moment when the seed is thrown is defined as the seed throwing angle, and the size of the seed throwing angle is adjusted by adjusting the connection angle between the hole blocking assembly and the rotating shaft.

[0011] Preferably, the seed throwing angle is between 0° and 45°.

[0012] Preferably, the seed suction device comprises a seed suction tray and air suction end covers arranged on both sides of the seed suction tray, and the negative pressure seed suction part is arranged on the seed suction tray.

[0013] Preferably, the seed suction tray is detachably connected to the air suction end cover to facilitate replacement.

[0014] Preferably, the negative pressure of the negative pressure device is adjustable to control the suction force of the negative pressure seed suction part on the seeds.

[0015] Beneficial effects:

[0016] The air-suction seed metering device can efficiently realize the precise sowing operation of various types of seeds, and has the advantages of stable seed suction, etc. It adopts air-suction seed extraction to improve the seed lossless rate, so that the seed lossless rate reaches more than 95%, and the negative pressure can be adjusted to meet the requirements of seeds of different sizes and sowing speeds. The negative pressure is cut off by plugging the holes with the plugging component, so that the seeds fall automatically based on their own gravity, reduce the speed of seed falling, and minimize the probability of seed bouncing, so as to ensure the accuracy of seed positioning and improve the uniformity of seeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cooperation between a vacuum adsorption seeding structure and a seed box in an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of a vacuum adsorption seeding structure according to an embodiment of the utility model;

[0019] Figure 3This is a schematic diagram of the appearance of a vacuum adsorption seeding structure according to an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of a seed suction disc of a vacuum adsorption seeding structure after being unfolded according to an embodiment of the utility model;

[0021] Figure 5 This is another plan view of a vacuum adsorption seeding structure according to an embodiment of the utility model;

[0022] Icons: seed box 1, seed absorber 2, seed suction disc 21, air suction end cover 22, negative pressure seed suction part 23, rotating shaft 24, connecting piece 31, pull rod 32, rubber pressure wheel 33, tension spring 34. DETAILED DESCRIPTION

[0023] Combination Figures 1 to 5 As shown, the present embodiment provides a vacuum adsorption seeding structure, including a seed box 1 for containing seeds, and also including: a seed absorber 2 provided with a plurality of negative pressure seed absorption parts 23 along the circumferential direction, and the seed absorber 2 is connected with a negative pressure device to generate negative pressure in the negative pressure seed absorption part 23; the seed absorber 2 is rotatably arranged on one side of the seed box 1 so that when the negative pressure seed absorption part 23 rotates through the seed box 1, the seeds in the seed box 1 are absorbed one by one at the negative pressure seed absorption part 23; a hole plugging component is arranged in the seed absorber 2, and the hole plugging component is suitable for acting under the seed absorber 2 to cut off the negative pressure of the corresponding negative pressure seed absorption part 23 when the negative pressure seed absorption part 23 rotates through, so that the seeds absorbed on the corresponding negative pressure seed absorption part 23 fall off.

[0024] In this embodiment, the seeding structure is arranged in the seeding device, and is used to take out the seeds from the seed box 1, and sprinkle them on the seed belt located below the seeding structure in a set order and spacing, and then roll up the seed belt for subsequent sowing. The focus of this embodiment is on the seeding structure for transporting seeds from the seed box 1 to the seed belt, which is described in detail below.

[0025] Combination Figures 1 to 4As shown, in this embodiment, the seed sucker 2 is set to be cylindrical, and a rotating shaft 24 is set in the direction of its central axis; the seed sucker 2 includes a seed sucking disc 21 and an air suction end cover 22 arranged on both sides of the seed sucking disc 21, and the seed sucking disc 21 is provided with the negative pressure seed sucking part 23, and the seed sucking disc 21 here is detachably connected to the air suction end cover 22 for easy replacement. By replacing the seed sucking disc 21 with different spacing or different numbers of negative pressure holes, it can be used to meet the seeding requirements of different seeds. The air suction end cover 22 is circular, and the seed sucking disc 21 can be rolled into a cylindrical shape to be installed between two air suction end covers 22. The air suction end cover 22 is set on the rotating shaft 24, and the air suction end cover 22 can be driven to rotate by rotating the rotating shaft 24, thereby driving the seed sucker 2 to rotate. The rotating shaft 24 can be connected to a power device, such as a drive motor. A sealing ring is provided between the air suction end cover 22 and the seed suction disc 21 to improve the sealing effect, thereby increasing the negative pressure suction force of the negative pressure seed suction part 23 .

[0026] The rotating shaft 24 is provided with an intermediate shaft hole for connecting a negative pressure device (not shown). The negative pressure device can adopt a negative pressure fan. The negative pressure of the gas generated by the negative pressure fan passes through the intermediate shaft hole, so that the entire seed metering device cavity produces a negative pressure effect, and the gas flow rate generated by the negative pressure fan can be adjusted to adapt to the requirements of different seeds and sowing speeds.

[0027] Several of the negative pressure seed suction parts 23 are evenly distributed along the circumferential direction of the seed suction device 2. Here, by using the evenly distributed negative pressure seed suction parts 23, the seeds on the seed belt can be evenly distributed during the seeding process to facilitate subsequent sowing. Each of the negative pressure seed suction parts 23 includes at least one negative pressure hole, and the number of seeds that can be absorbed by each negative pressure seed suction part 23 is controlled by controlling the number of negative pressure holes. For example, when two seeds need to be arranged at the same position, two negative pressure holes can be set in each negative pressure seed suction part 23, so that two seeds can be absorbed at one time.

[0028] Combination Figure 1 and Figure 5As shown, in this embodiment, the seed box 1 is arranged on one side of the seed absorber 2. Specifically, when the seed absorber 2 rotates clockwise, the seeds are adsorbed from the side, and then continue to rotate, driving the seeds to drop after passing the highest point. Here, the side of the seed box 1 close to the seed absorber 2 is open, so that the seeds in the seed box 1 remain in contact with the seed suction disc 21, and the adsorbed seeds will not be scraped off during the continuous rotation of the seed suction disc 21. The lower part of the seed absorber 2 is set as a seed throwing area, which defines the moment when the seeds are thrown out. The angle between the line connecting the center of the rubber hole pressing wheel and the center of the seed metering device and the vertical direction is the seed throwing angle γ. The size of the seed throwing angle is adjusted by adjusting the connection angle between the hole plugging component and the rotating shaft 24. The seed throwing angle γ is between 0° and 45°. In the process of being thrown by the seed metering device seed suction disc 21 onto the seed belt that falls to the bottom, the seeds will inevitably be affected by wind pressure, thereby changing the movement trajectory of the seeds, resulting in inaccurate spacing between the wrapped seeds, or even missed sowing. Therefore, reducing the time that seeds move in the air as much as possible can effectively reduce the probability that seeds are affected by wind pressure; on the other hand, the longer the time that seeds move from being thrown to falling on the paper tape, the greater the vertical speed of the seeds when they touch the moving paper tape, that is, the greater the angle between the speed direction of the seeds and the direction in which the paper tape moves when the seeds fall on the paper tape, which in turn causes the seeds to bounce after falling on the paper tape, causing the seed position to change or fall off. Therefore, the seed throwing angle γ is between 0° and 45°, and within this range, cosγ decreases as the angle increases, and the angle between the speed direction of the seeds and the direction in which the paper tape moves increases as the seed throwing angle γ increases. When throwing seeds, the seed throwing point should be ensured to be at the bottom of the seed row as much as possible, so as to reduce the probability of seed bouncing as much as possible and ensure the accuracy of seed positioning.

[0029] Combination Figure 1 to Figure 2 As shown, in this embodiment, the plugging hole assembly includes a connecting member 31, a pull rod 32, a rubber pressure wheel 33 and a tension spring 34, wherein the connecting member 31 connects one end of the pull rod 32 with the rotating shaft 24, and the other end of the pull rod 32 is connected to the rubber pressure wheel 33, and the tension spring 34 acts on the pull rod 32 to make the rubber pressure wheel 33 press the negative pressure seed suction part 23 on the seed suction device 2. The position of the rubber pressure wheel 33 can be controlled by adjusting the connection angle between the connecting member 31 and the rotating shaft 24, thereby controlling the angle of seed throwing. The pull rod 32 is used to fix the rubber pressure wheel 33, and the tension spring 34 is used to keep the rubber pressure wheel 33 pressed. The rubber pressure wheel 33 is used to press the negative pressure hole passing below it, cut off the negative pressure suction force of the corresponding negative pressure hole, so that the seeds adsorbed by the negative pressure hole automatically fall into the seed belt due to gravity. The rubber pressure wheel can make the negative pressure cutting effect better, and in the whole process, it does not affect the negative pressure suction force of other negative pressure seed suction parts 23.

[0030] During operation, the seed absorber 2 is connected to the motor through a belt, and the seed absorber disc 21 rotates with the rotation of the air suction end covers 22 on both sides; the negative pressure of the gas required during the entire working process is provided by the negative pressure fan, and the gas is transmitted to the seed absorber 2 through the hole on the intermediate shaft. When the seed discharger rotates to the seed box 1 position, due to the negative pressure of the gas, the seeds in the seed box 1 are adsorbed on the negative pressure holes of the seed absorber 2 under the action of the gas pressure; the seeds adsorbed on the seed absorber disc 21 are carried to the rubber pressure wheel 33 area as the seed absorber 2 rotates, and when the negative pressure hole for adsorbing the seeds is pressed by the rubber pressure wheel 33, the internal negative pressure will be cut off, and the pressure difference on both sides of the negative pressure hole disappears at this time, and the seeds are separated from the seed absorber 2 under the action of their own gravity and centrifugal force and are smoothly discharged, completing the entire seed suction and discharge process.

[0031] This solution uses airflow and air pressure difference to absorb and sow seeds. This design makes the sowing process more precise, can effectively achieve single-grain precision sowing or multiple-grain sowing at the same time, and is convenient for assembly. It is also more beautiful and can effectively improve the sowing efficiency and uniformity.

[0032] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0033] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. A vacuum adsorption seeding structure, comprising a seed box for holding seeds, characterized in that: Also includes: A plurality of seed suckers with negative pressure seed sucking parts are arranged along the circumferential direction, and the seed suckers are connected to negative pressure devices to generate negative pressure in the negative pressure seed sucking parts; the seed suckers are rotatably arranged on one side of the seed box so that when the negative pressure seed sucking parts rotate through the seed box, the seeds in the seed box are sucked one by one at the corresponding negative pressure seed sucking parts; A hole blocking component is arranged in the seed sucker, and the hole blocking component is suitable for cutting off the negative pressure suction force of the corresponding negative pressure seed sucking part when the negative pressure seed sucking part rotates and passes below it, so that the seeds adsorbed on the negative pressure seed sucking part fall off.

2. The vacuum adsorption seeding structure according to claim 1 is characterized in that: The seed absorber is arranged in a cylindrical shape, and a rotating shaft is arranged in the direction of the central axis thereof; an intermediate shaft hole is arranged on the rotating shaft for connecting a negative pressure device.

3. The vacuum adsorption seeding structure according to claim 2 is characterized in that: The hole blocking assembly includes a connecting piece, a pull rod, a rubber pressure wheel and a tension spring. The connecting piece connects one end of the pull rod with the rotating shaft, and the other end of the pull rod is connected to the rubber pressure wheel. The tension spring acts on the pull rod to make the rubber pressure wheel press the negative pressure seed suction part inside the seed sucker.

4. The vacuum adsorption seeding structure according to claim 2 is characterized in that: The plurality of negative pressure seed suction parts are evenly distributed along the circumferential direction of the seed suction device.

5. The vacuum adsorption seeding structure according to claim 2, characterized in that: Each of the negative pressure seed suction parts includes at least one negative pressure hole, and the number of seeds that can be absorbed by each negative pressure seed suction part can be controlled by controlling the number of the negative pressure holes.

6. The vacuum adsorption seeding structure according to claim 2, characterized in that: The angle between the line connecting the center of the rubber hole pressing wheel and the center of the seed metering device and the vertical direction at the moment when the seed is thrown is defined as the seed throwing angle, and the size of the seed throwing angle is adjusted by adjusting the connection angle between the hole plugging assembly and the rotating shaft.

7. The vacuum adsorption seeding structure according to claim 6, characterized in that: The seed throwing angle is between 0° and 45°.

8. The vacuum adsorption seeding structure according to claim 2, characterized in that: The seed suction device comprises a seed suction tray and air suction end covers arranged on both sides of the seed suction tray, and the negative pressure seed suction part is arranged on the seed suction tray.

9. The vacuum adsorption seeding structure according to claim 8, characterized in that: The seed suction disc is detachably connected to the air suction end cover for easy replacement.

10. The vacuum adsorption seeding structure according to claim 1, characterized in that: The negative pressure of the negative pressure device is adjustable to control the suction force of the negative pressure seed suction part on the seeds.

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