A single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device

Abstract

The present invention discloses a single- and double-grain adjustable electrically-controlled double-disc air-suction seed metering device, comprising a lower fixed seat, a first rotating support seat, a second rotating support seat, a guide slide rail and a power assembly, wherein the first rotating support seat and the power assembly are respectively fixedly mounted on the lower fixed seat, guide slide rails are fixedly mounted on the lower fixed seats on both sides of the power assembly, a second rotating support seat is slidably mounted on the guide slide rail, and the second rotating support seat is fixedly connected to the power assembly. The present invention facilitates the loading and unloading of material rolls and improves work efficiency through the rotatability of the first rotating support seat and the mobility of the second rotating support seat.

Description

Technical Field

[0001] The invention relates to the field of seed metering devices, in particular to a single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device. Background Art

[0002] Manual sowing not only involves many processes, is tiring, and has low efficiency, but also low sowing quality. It is difficult to ensure the consistency of sowing spacing and row spacing by human eyes alone. The plot seeder has high operating efficiency and good sowing technology. It can also reduce test errors, improve test accuracy, greatly shorten the experimental cycle, and improve operating efficiency. The most critical component of the plot seeder is the seed meter. The seed meter can be divided into pneumatic and mechanical types according to different seeding methods. The mechanical type has low cost and simple structure, but it is easy to damage seeds during seeding and is not suitable for plot sowing. The pneumatic seed meter is divided into three types: air blowing, air pressure, and air suction. Among them, the air suction type has the lowest damage to seeds, and has no strict requirements on seed shape and size, and it is easy to achieve single or double seed sowing. The seed meter is generally connected to the ground wheel. When sowing in the plot, due to the unevenness of the surface, the ground wheel is easy to slip, resulting in missed sowing during the seeding process. When the existing seed meter encounters a sowing plot with different sowing requirements, it is necessary to manually replace the seed disc, which is time-consuming and labor-intensive.

[0003] In plot sowing, we often encounter situations where different plots have different sowing requirements. For example, the previous plot requires a single seed per hole, while the next plot requires a double seed per hole. In this case, the seed tray needs to be replaced immediately after sowing a plot, which not only consumes a lot of time, but also requires operators to operate, and cannot be automated. At this time, it is necessary to design a seed meter that can automatically change the number of seeds sown per hole of the seed meter.

[0004] Patent number CN113016292B proposes an air-suction precision seed metering device with adjustable suction hole size. The suction hole size can be adjusted to accommodate seeds of various sizes, but single and double grains cannot be adjusted. Summary of the invention

[0005] The main purpose of the invention is to provide a single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A single- and double-grain adjustable electrically controlled double-disc air-suction seed meter, comprising a seed meter housing, a first seed disk, a second seed disk, a sealing ring, a bearing and a seed meter shaft, a feed inlet is fixedly provided on one side of the upper end surface of the seed meter housing, a negative pressure port is fixedly provided on the side end surface of the seed meter housing away from the feed inlet, a seed meter port is fixedly provided on the lower end surface of the seed meter housing, a first seed disk, a second seed disk and a sealing ring are sequentially arranged in the seed meter housing from the feed inlet to the negative pressure port, the sealing ring is fixedly installed in the seed meter housing, bearings are fixedly installed at the centers of the first and second seed disks respectively, the first and second seed disks are fixedly connected to the seed meter shaft via bearings, the seed meter shaft extends out of the seed meter housing, the first seed disk, the second seed disk and the sealing ring are tightly and slidably connected to each other.

[0008] Furthermore, the first seed row disc and the second seed row disc are of the same size and structure, and include a disc body, on which are fixedly provided a plurality of suction hole groups evenly distributed along the circumference of the disc body, and the suction hole group consists of no less than two suction holes.

[0009] Furthermore, the sealing ring separates the inner cavity of the seed metering device housing into a negative pressure cavity and a feeding cavity which are sealed to each other. A feeding port is fixedly provided above the feeding cavity, a negative pressure port is fixedly provided on the negative pressure cavity, a avoidance hole is fixedly provided at the center of the sealing ring, and a negative pressure connecting groove is also provided on the sealing ring.

[0010] Furthermore, the seeding shaft includes a first linkage shaft and a second linkage shaft, wherein the second linkage shaft is a hollow linkage shaft, and the second linkage shaft is sleeved on the first linkage shaft, and the first linkage shaft and the second linkage shaft do not contact each other.

[0011] Furthermore, the first linkage shaft and the second linkage shaft both extend out of the seed meter housing and are connected to different motors for rotation via different pulleys.

[0012] Furthermore, the shell of the seed metering device includes a first shell body and a second shell body. An isolation plate is provided in the first shell body, and the isolation plate separates the feed inlet and the seed metering port. A feed outlet is fixedly provided on the isolation plate.

[0013] Furthermore, a surface of the isolation plate facing the feed inlet is covered with a protective layer.

[0014] Furthermore, the protective layer is made of soft material, and the soft material includes one or more of rubber material and textile material.

[0015] Furthermore, the protective layer is made of a plurality of bristles adhered and erected on the isolation plate, and the bristles are made of soft material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention relies on the speed differential between seeding discs to change the seeding mode, and the speed differential is electrically controlled, which is simpler, faster and safer than manually changing the seeding discs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Fig. 1 is a structural composition diagram of the present invention;

[0019] FIG2 is a structural diagram of a first outer shell of the present invention;

[0020] Figure 3 This is a structural diagram of the first row seed tray or the second row seed tray of the present invention;

[0021] Figure 4 It is a structural diagram of the sealing ring of the present invention;

[0022] Figure 5 It is the structural diagram of the seeding shaft of the present invention.

[0023] Attached photos

[0024] 1. Seeder housing; 2. First seeding disc; 3. Second seeding disc; 4. Sealing ring; 5. Bearing; 6. Seeding shaft; 7. Feed inlet; 8. Negative pressure port; 9. Seeding port; 10. Disc body; 11. Suction hole group; 12. Suction hole; 13. Avoidance hole; 14. Negative pressure connecting groove; 15. First linkage shaft; 16. Second linkage shaft; 17. First outer shell; 18. Second outer shell; 19. Isolation plate; 20. Feed port; 22. Bristles. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] Referring to FIGS. 1-4, a single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device comprises a seed metering device housing 1, a first seeding disk 2, a second seeding disk 3, a sealing ring 4, a bearing 5 and a seeding shaft 6. The seed metering device housing 1 comprises a first outer shell 17 and a second outer shell 18. The upper end surface of the first outer shell 17 of the seed metering device housing 1 is provided with a feed inlet 7 for feeding seeds into the seed metering device. A negative pressure port 8 is fixedly provided on the side end surface of the second outer shell 18 away from the feed inlet 7. The negative pressure port 8 is used to connect a device such as an exhaust fan that can form a negative pressure in the seed metering housing. A seeding port 9 for seeds to flow out of the seed metering device is fixedly provided on the lower end surface of the first outer shell 17. The first seeding disk 2, the second seeding disk 3 and the sealing ring 4 are arranged in sequence in the seed metering device housing 1 from the feed inlet 7 to the negative pressure port 8. Through the sealing ring 4, the first seeding disk 2 and the second seed-disc 3 divide the space in the seed-disc housing 1 into a negative pressure area and a seed placement area. The first seed-disc 2, the second seed-disc 3 and the sealing ring 4 are installed in the second outer shell 18 of the seed-disc housing 1. Bearings 5 ​​are fixedly installed at the center of the first seed-disc 2 and the second seed-disc 3 respectively. The first seed-disc 2 and the second seed-disc 3 are fixedly connected to the seed-disc shaft 6 through the bearings 5. The first seed-disc 2 and the second seed-disc 3 can rotate freely along the seed-disc shaft 6 in the seed-disc housing 1. The seed-disc shaft 6 extends out of the seed-disc housing 1. The first seed-disc 2, the second seed-disc 3 and the sealing ring 4 are tightly and slidably connected to each other.

[0027] The first seed row disk 2 and the second seed row disk 3 are of the same size and structure, and include a disk body 10 on which a plurality of suction hole groups 11 evenly distributed along the circumference of the disk body 10 are fixedly opened, and the suction hole group 11 is composed of no less than two suction holes 12.

[0028] The negative pressure formed by the negative pressure holes causes the suction hole group 11 to form suction force. When the suction hole group 11 passes through the seeds, the seeds are adsorbed on the suction hole group 11. The seeds are transferred to the area above the seeding port 9 through the rotation of the seeding disk. The suction hole group 11 on the seeding disk loses negative pressure due to the sealing ring 4. The seeds adsorbed on the suction hole group 11 fall to the seeding port 9 and flow out of the seeding device, completing the seeding.

[0029] The sealing ring 4 divides the inner cavity of the seed metering device housing 1 into a negative pressure cavity and a feeding cavity which are sealed to each other. The feeding port 7 is in the feeding cavity, and the negative pressure port 8 is in the negative pressure cavity. A avoidance hole 13 for the seed metering shaft 6 to pass through is fixedly opened at the center of the sealing ring 4. A negative pressure connecting groove 14 is also opened on the sealing ring 4. The negative pressure connecting groove 14 is on the same track as the movement trajectory of the suction hole group 11.

[0030] The seeding shaft 6 includes a first linkage shaft 15 and a second linkage shaft 16 . The second linkage shaft 16 is a hollow linkage shaft. The second linkage shaft 16 is sleeved on the first linkage shaft 15 , and the first linkage shaft 15 and the second linkage shaft 16 do not contact each other.

[0031] The first linkage shaft 15 and the second linkage shaft 16 both extend out of the seed meter housing 1 and are connected to different motors for rotation via different pulleys.

[0032] Different motors are used to realize the non-interference rotation of the first linkage shaft 15 and the second linkage shaft 16. Different combinations of the suction hole groups 11 on the two seed discs can be achieved through differential rotation.

[0033] An isolation plate 19 is provided in the first outer shell 17 , and the isolation plate 19 separates the feed port 7 from the seed discharge port 9 . A feed port 20 is fixedly formed on the isolation plate 19 .

[0034] The surface of the isolation plate 19 facing the feed inlet 7 is covered with a protective layer.

[0035] The protective layer is made of soft material, which includes one or more of rubber material and textile material.

[0036] The protective layer is made of a plurality of bristles 22 adhered and erected on the isolation plate 19, and the bristles 22 are made of soft material. Example 1

[0037] When single-seed sowing is required, before negative pressure is generated, the two seed discs rely on different motors to output different speeds for relative rotation, so that only one suction hole in adjacent positions of the two seed discs is directly opposite. After negative pressure is generated, the two seed discs rely on different motors to output the same speed so that there is no speed difference between the two, so that the seeder can perform single-seed sowing. Example 2

[0038] When double-seed or multi-seed sowing is required, before negative pressure is generated, the two seed discs rely on different motors to output different speeds for relative rotation, so that two or a corresponding number of suction holes in adjacent positions of the two seed discs are facing each other. After negative pressure is generated, the two seed discs rely on different motors to output the same speed so that there is no speed difference between the two, so that the seed meter performs single-seed sowing.

[0039] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device, comprising a seed metering device housing (1), a first seed metering disc (2), a second seed metering disc (3), a sealing ring (4), a bearing (5) and a seed metering shaft (6), characterized in that: A feed inlet (7) is fixedly provided on one side of the upper end surface of the seeding device housing (1), a negative pressure port (8) is fixedly provided on the side end surface of the seeding device housing (1) away from the feed inlet (7), a seeding port (9) is fixedly provided on the lower end surface of the seeding device housing (1), and a first seeding disk (2), a second seeding disk (3), and a sealing ring (4) are sequentially provided in the seeding device housing (1) from the feed inlet (7) to the negative pressure port (8), and the sealing ring (4) is fixedly provided. The first seeding disc (2) and the second seeding disc (3) are fixedly installed in the seeding device housing (1); the first seeding disc (2) and the second seeding disc (3) are respectively fixedly installed with bearings (5) at the center of the circle; the first seeding disc (2) and the second seeding disc (3) are fixedly connected to a seeding shaft (6) through the bearings (5); the seeding shaft (6) extends out of the seeding device housing (1); the first seeding disc (2), the second seeding disc (3) and the sealing ring (4) are closely connected and slidably connected to each other; the first seeding disc (2) and the second seeding disc (3) are fixedly connected to the seeding shaft (6) through the bearings (5); ... first seeding disc (2) and the second seeding disc (3) are fixedly connected to the seeding shaft (6) through the bearings (5); the first seeding disc (2) and the second seeding disc (3) are fixedly connected to the seeding shaft (6) through the bearings (5); the first seeding disc (2) and the second seeding disc (3) are fixedly connected to the seeding shaft (6) through the bearings (5); the first seeding disc (2) and the second seeding disc (3) are fixedly connected to the seeding shaft (6) through the bearings (5); the first seeding disc (2) and the second seed The two seeding discs (3) are of the same size and structure, and include a disc body (10), on which a plurality of suction hole groups (11) are fixedly provided and evenly distributed along the circumference of the disc body (10), and the suction hole group (11) is composed of no less than two suction holes (12); the sealing ring (4) separates the inner cavity of the seeding device housing (1) into a negative pressure cavity and a material placement cavity which are sealed to each other, and a material inlet (7) is fixedly provided above the material placement cavity, and a material inlet (7) is fixedly provided on the negative pressure cavity. A negative pressure port (8) is provided, a position avoidance hole (13) is fixedly provided at the center of the sealing ring (4), and a negative pressure connection groove (14) is also provided on the sealing ring (4); the seed discharging shaft (6) comprises a first linkage shaft (15) and a second linkage shaft (16), the second linkage shaft (16) is a hollow linkage shaft, the second linkage shaft (16) is sleeved on the first linkage shaft (15), and the first linkage shaft (15) and the second linkage shaft (16) do not contact each other; The first linkage shaft (15) and the second linkage shaft (16) both extend out of the seed meter housing (1) and are connected to different motors for rotation via different pulleys; the seed meter housing (1) comprises a first outer housing (17) and a second outer housing (18); an isolation plate (19) is provided in the first outer housing (17); the isolation plate (19) separates the feed inlet (7) and the seed metering outlet (9); a feed outlet (20) is fixedly provided on the isolation plate (19); When single seed sowing is required, before negative pressure is generated, the first seed row disc (2) and the second seed row disc (3) rotate relative to each other by means of different motors outputting different rotation speeds, so that only one suction hole (12) of the suction hole groups (11) at adjacent positions of the first seed row disc (2) and the second seed row disc (3) is directly opposite, and after negative pressure is generated, the first seed row disc (2) and the second seed row disc (3) rotate at the same rotation speed by means of different motors outputting the same rotation speed so that there is no speed difference between the two, so that the seed meter performs single seed sowing; When double seed sowing or multi-seed sowing is required, before negative pressure is generated, the first seed row disc (2) and the second seed row disc (3) rotate relative to each other by means of different motors outputting different rotation speeds, so that two or a corresponding number of suction holes (12) at adjacent positions on the first seed row disc (2) and the second seed row disc (3) face each other. After negative pressure is generated, the first seed row disc (2) and the second seed row disc (3) output the same rotation speed by means of different motors so that there is no speed difference between the two, so that the seed meter performs multi-seed sowing.

2. The single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device according to claim 1, characterized in that: The surface of the isolation plate (19) on one side facing the feed inlet (7) is covered with a protective layer.

3. The single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device according to claim 2, characterized in that: The protective layer is made of soft material, which includes one or more of rubber material and textile material.

4. The single- and double-grain adjustable electrically controlled double-disc air-suction seed metering device according to claim 2, characterized in that: The protective layer is made of a plurality of brush bristles (22) adhered and erected on the isolation plate (19), and the brush bristles (22) are made of soft material.

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