Air-blast seed metering device with adjustable seed number

Abstract

The utility model relates to agricultural machinery, and belongs to air suction type seed metering device with adjustable seed number, which comprises the following parts: a suction seed disc with suction seed through hole and post hole is sealedly installed on the left end of negative pressure air casing, a seed box with seed inlet, seed discharge port, partition, seed discharge brush is fixedly arranged and sealedly matched with the suction seed disc, a T-shaped sleeve is sealedly inserted on the right end of negative pressure air casing, a driving post and a seed number adjusting positioning rod are fixedly arranged on the left and right end faces of the T-shaped sleeve respectively, radial grooves and axial grooves are arranged on the T-shaped sleeve, a driving shaft is inserted in the T-shaped sleeve, a seed number adjusting plate is fixedly arranged on the driving shaft, an L-shaped baffle is hingedly arranged on the seed number adjusting plate through a connecting rod, a guide post is fixedly arranged on the L-shaped baffle, and a locking pin is sequentially inserted in the seed number adjusting hole on the driving shaft and the seed number adjusting positioning rod.

Description

Technical Field

[0001] This invention belongs to agricultural machinery and mainly relates to a pneumatic seed metering device in which the number of seeds sown can be adjusted and controlled according to the needs of sowing operations. Background Technology

[0002] Seed metering devices are one of the most important and critical operating components of seeders, directly affecting and determining the quality and efficiency of seed metering operations. Currently, the market demand and usage of pneumatic seed metering devices, which offer high operating efficiency, good seed metering stability, and are particularly suitable for installation on large, multi-row seeders, have increased significantly, playing a vital role in improving the level of mechanized seeding operations. However, due to shortcomings in structural design, the various pneumatic seed metering devices currently used in my country can only be used for one crop, and the number of seeds sown cannot be changed. Their limited applicability, poor versatility, and low efficiency are technical problems that must be addressed. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of current mechanized sowing operations for air-suction seed metering devices, to develop and design an air-suction seed metering device with adjustable seed quantity, so as to achieve the goal of adjusting the seed quantity according to agronomic requirements, high versatility, wide applicability, strong adaptability, and high efficiency.

[0004] The purpose of this invention is achieved as follows: A seed suction and discharge tray is coaxially and radially positioned and rotatably sealed on the left end of a fixedly configured negative pressure gas shell. N rows of equal-numbered seed suction and discharge through holes are sequentially formed radially from the inside to the outside on the seed suction and discharge tray. A column hole is formed circumferentially at the center of the seed suction and discharge tray. A seed box and the seed suction and discharge tray are fixedly configured to seal and cooperate with each other on the outer left end of the seed suction and discharge tray. Inside the seed box, a partition divides the inner cavity of the seed box into a seed storage chamber and a seed discharge chamber. A seed discharge brush is installed on the partition at the seed discharge position. On the inner side, the seed discharge brush is in close contact with the left end face of the seed suction tray. The seed inlet and seed outlet are respectively located on the upper and lower parts of the seed box, and are connected to the seed storage chamber and seed outlet chamber inside the seed box, respectively. A T-shaped sleeve is coaxially and radially positioned and rotatably sealed on the right end of the negative pressure gas shell. The drive column and the seed number adjustment positioning rod are fixedly mounted on the left and right end faces of the T-shaped sleeve, respectively. The drive column is fixedly inserted into the column hole of the seed suction tray and fixedly connected to the T-shaped sleeve. An axial groove and a radial groove are respectively provided on the upper part. The drive shaft is radially positioned and axially reciprocatingly inserted into the cylinder hole of the T-shaped sleeve. The seed number adjustment plate is movably inserted into the axial groove on the T-shaped sleeve. The seed number adjustment plate is fixed on the drive shaft. An L-shaped baffle is axially positioned and radially retractable hinged and supported on the seed number adjustment plate at the position between the seed suction and discharge disc located in the negative pressure gas shell cavity and the T-shaped sleeve via a connecting rod. The left end face of the L-shaped baffle is either blocking or radially closing the N rows of seed suction and discharge through holes of the seed suction and discharge disc. The staggered opening mechanism allows the guide post, fixed to the right end face of the L-shaped baffle, to be slidably inserted into the radial groove on the T-shaped sleeve. N seed number adjustment holes are axially arranged sequentially on the right side of the drive shaft, located on the outer side of the right end of the T-shaped sleeve. Locking pins are removably inserted into the seed number adjustment positioning rod, and these locking pins are sequentially inserted into the N seed number adjustment holes on the drive shaft, connecting the T-shaped sleeve and the drive shaft as a single unit. An air intake is provided on the negative pressure air housing, thus forming an air-suction seed metering device with adjustable seed number.

[0005] This invention not only enables the same air-suction seed metering device to meet the sowing requirements of different seed counts for the same crop, but also to be applicable to the sowing needs of crops with different seed counts. It features a novel, unique, reasonable, simple, versatile, adaptable, efficient, and easy-to-use adjustment and operation, providing technical support for expanding the application of air-suction seed metering devices. Attached Figure Description

[0006] Figure 1 This is an exploded view of the overall structure of a pneumatic seed metering device with adjustable seed quantity.

[0007] Figure 2This is a three-dimensional schematic diagram of the overall structure of an air-suction seed metering device with adjustable seed quantity.

[0008] Figure 3 This is a two-dimensional schematic diagram of the overall structure of an air-suction seed metering device with adjustable seed quantity.

[0009] Figure 4 yes Figure 3 Sectional view along axis AA;

[0010] Figure 5 This is a schematic diagram of a T-shaped sleeve structure.

[0011] Part number description in the image:

[0012] 1. Seed inlet, 2. Seed box, 3. Seed suction and discharge through hole, 4. Seed suction and discharge tray, 5. Negative pressure air shell, 6. L-shaped baffle, 7. Seed number adjustment plate, 8. Connecting rod, 9. Drive shaft, 10. Locking pin, 11. Seed number adjustment hole, 12. Axial groove, 13. T-shaped sleeve, 14. Seed number adjustment positioning rod, 15. Drive column, 16. Guide column, 17. Air suction port, 18. Column hole, 19. Seed discharge port, 20. Seed discharge brush, 21. Partition, 22. Radial groove. Detailed Implementation

[0013] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. A pneumatic seed metering device with adjustable seed quantity comprises a seed suction and discharge plate 4 coaxially and rotatably sealed and mounted on the left end of a fixedly configured negative pressure air housing 5. N rows of seed suction and discharge through holes 3 of the same number are sequentially formed radially from the inside to the outside on the seed suction and discharge plate 4. A column hole 18 is formed circumferentially at the center of the seed suction and discharge plate 4. A seed box 2 is fixedly configured on the outer left end of the seed suction and discharge plate 4 in a sealed fit with the seed suction and discharge plate 4. Inside the seed box 2, a partition 21 divides the inner cavity of the seed box 2 into a seed storage chamber and a seed discharge chamber. A seed discharge brush 20 is installed on the partition 21 at the discharge position. On the side of the seed chamber, the seed discharge brush 20 is in close contact with the left end face of the seed suction tray 4. The seed inlet 1 and the seed discharge outlet 19 are respectively located on the upper and lower parts of the seed box 2. The seed inlet 1 and the seed discharge outlet 19 are respectively connected to the seed storage chamber and the seed discharge chamber inside the seed box 2. A T-shaped sleeve 13 is coaxially and radially positioned and rotatably sealed on the right end of the negative pressure gas shell 5. The drive column 15 and the seed number adjustment positioning rod 14 are respectively fixedly fitted on the left and right end faces of the T-shaped sleeve 13. The drive column 15 is fixedly inserted into the column hole 18 of the seed suction tray 4. An axial groove 12 and a radial groove 22 are respectively provided on the T-shaped sleeve 13. The drive shaft 9 is radially positioned and axially reciprocatingly inserted into the cylinder hole of the T-shaped sleeve 13. The seed number adjustment plate 7 is movably inserted into the axial groove 12 on the T-shaped sleeve 13. The seed number adjustment plate 7 is fixedly mounted on the drive shaft 9. An L-shaped baffle 6 is axially positioned and radially telescopically hinged and supported on the seed number adjustment plate 7 at the position between the seed suction and discharge disc 4 located in the cavity of the negative pressure gas shell 5 and the T-shaped sleeve 13 via a connecting rod 8. The left end face of the L-shaped baffle 6 is respectively connected to the N row of the seed suction and discharge disc 4. The seeding through hole 3 is either blocked and closed or radially offset and open. The guide post 16, which is fixed on the right end face of the L-shaped baffle 6, is slidably inserted into the radial groove 22 on the T-shaped sleeve 13. N seed number adjustment holes 11 are axially arranged on the right side of the drive shaft 9, located on the outer side of the right end of the T-shaped sleeve 13. Locking pins 10 are movably inserted into the seed number adjustment positioning rod 14. The locking pins 10 are sequentially inserted into the N seed number adjustment holes 11 on the drive shaft 9, connecting the T-shaped sleeve 13 and the drive shaft 9 into one unit. An air intake 17 is provided on the negative pressure air housing 5.

[0014] During operation, the suction port 17 on the negative pressure air housing 5 is connected to the negative pressure suction source. The suction flow from the negative pressure suction source draws the inner cavity of the negative pressure air housing 5 into a negative pressure state. Under the action of this negative pressure suction, the seeds in the seed box 2 located in the seed storage chamber are adsorbed onto the port of the seed suction through hole 3 on the seed suction tray 4, which is not blocked by the L-shaped baffle 6. Simultaneously, the external rotational power causes the drive shaft 9 to rotate, which drives the T-shaped seed tray 9 through the cooperation of the seed number adjustment plate 7 and the locking pin 10 with the axial groove 12 and the seed number adjustment hole 11, respectively. The sleeve 13 rotates, and then the drive column 15 and the column hole 18 cooperate to drive the seed suction and discharge plate 4 to rotate. The connecting rod 8 and the guide column 16 cooperate with the radial groove 22 to drive the L-shaped baffle 6 to rotate. At this time, the drive shaft 9, the T-shaped sleeve 13, the L-shaped baffle 6 and the seed suction and discharge plate 4 rotate synchronously at the same speed. When the seed suction and discharge through hole 3 on the seed suction and discharge plate 4, which has been adsorbed with seeds, rotates into the seed discharge chamber of the seed box 2, the seeds are forcibly unloaded from the seed suction and discharge plate 4 under the cleaning of the seed discharge brush 20 and discharged out of the device through the seed discharge port 19, thus completing the seed discharge operation.

[0015] When the seed number needs to be adjusted according to agronomic requirements, the locking pin 10 is pulled out from the seed number adjustment hole 11 on the drive shaft 9. The drive shaft 9 is then pushed or pulled axially by hand within the hole of the T-shaped sleeve 13. Under the control of the seed number adjustment plate 7 and the axial groove 12, and the guide post 16 and the radial groove 22, the connecting rod 8 pushes or pulls the L-shaped baffle 6 to complete radial reciprocating movement between the seed suction tray 4 and the T-shaped sleeve 13, thereby adjusting the radial position of the L-shaped baffle 6 relative to the seed suction tray 4, that is, changing the number of seed suction holes 3 blocked by the L-shaped baffle 6, thus controlling the seed number. Afterwards, the locking pin 10 is inserted into the corresponding seed number adjustment hole 11, and the drive shaft 9 and the T-shaped sleeve 13 are locked by the seed number adjustment positioning rod 14.

Claims

1. A pneumatic seed metering device with adjustable seed quantity, characterized in that: A seed suction and discharge tray (4) is coaxially and radially positioned and rotatably sealed on the left end of a fixed negative pressure gas shell (5). N rows of seed suction and discharge through holes (3) of the same number are sequentially opened radially from the inside to the outside on the seed suction and discharge tray (4). A column hole (18) is opened circumferentially at the center of the seed suction and discharge tray (4). The seed box (2) and the seed suction and discharge tray (4) are sealed together, and the seed box (2) is fixedly positioned on the outside of the left end of the seed suction and discharge tray (4). Inside the seed box (2), a partition (21) divides the inner cavity of the seed box (2) into a seed storage chamber and a seed discharge chamber. A seed discharge brush (20) is installed on the side of the partition (21) located inside the seed discharge chamber. The brush (20) is in close contact with the left end face of the seed suction and discharge tray (4). The seed inlet (1) and seed discharge outlet (19) are respectively located on the upper and lower parts of the seed box (2). The seed inlet (1) and seed discharge outlet (19) are respectively connected to the seed storage chamber and seed discharge chamber inside the seed box (2). A T-shaped sleeve (13) is coaxially and radially positioned and rotatably sealed on the right end of the negative pressure gas shell (5). The drive column (15) and the seed number adjustment positioning rod (14) are respectively fixedly fitted on the left and right end faces of the T-shaped sleeve (13). The drive column (15) is fixedly inserted into the column hole (18) of the seed suction and discharge tray (4) and fixedly connected. The drive shaft (9) is radially positioned and axially reciprocatingly inserted into the hole of the T-shaped sleeve (13). The seed number adjustment plate (7) is movably inserted into the axial groove (12) on the T-shaped sleeve (13). The seed number adjustment plate (7) is fixed on the drive shaft (9). An L-shaped baffle (6) is axially positioned and radially retractable hinged and supported on the seed number adjustment plate (7) between the seed suction and discharge plate (4) located in the cavity of the negative pressure gas shell (5) and the T-shaped sleeve (13) by a connecting rod (8). The left end face of the L-shaped baffle (6) is connected to the N rows of seed suction and discharge through holes of the seed suction and discharge plate (4). 3) The guide post (16) fixed on the right end face of the L-shaped baffle (6) is slidably inserted into the radial groove (22) on the T-shaped sleeve (13). N seed number adjustment holes (11) are arranged axially in sequence on the right side of the drive shaft (9) and on the outer side of the right end of the T-shaped sleeve (13). Locking pins (10) are inserted into the seed number adjustment positioning rod (14) and are pulled and moved. The locking pins (10) are inserted into the N seed number adjustment holes (11) on the drive shaft (9) in sequence, connecting the T-shaped sleeve (13) and the drive shaft (9) into one unit. An air inlet (17) is provided on the negative pressure air housing (5).

Images