Air suction type seed metering mechanism

Abstract

A kind of air suction type seed metering mechanism, including shell feed port, the inner wall of the shell upper end is fixedly communicated with feed port, the outer wall right side of the shell is equipped with feeding seed amount adjusting structure, the left lower end of the shell is fixedly communicated with air inlet pipe, the inner wall lower end of the shell is fixedly communicated with standpipe.This air suction type seed metering mechanism, by feeding seed amount adjusting structure, start electric telescopic rod drive second cylinder in two rubber cylinders right activity, when the large through-hole of second cylinder left side is located between two rubber cylinders, by electric telescopic rod drive second cylinder between rubber cylinder activity, adjust the size of through-hole of seed adsorption, in turn, the amount of feeding seed is adjusted, again by first motor drive second cylinder with negative pressure inside rotation, seed is adsorbed on the screen of second cylinder inner wall and is transported, avoid a large number of seed accumulation and cause blockage, effectively improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of seed feeding quantity adjustment technology for pneumatic seed metering devices, and in particular to a seed feeding quantity adjustment mechanism for pneumatic seed metering devices. Background Technology

[0002] The air suction seed metering device is a commonly used seed metering device in modern agricultural seeding machinery. It uses the principle of negative pressure to adsorb and accurately release seeds into the soil. The seed feeding adjustment mechanism is the key part of the device used to adjust the seeding amount. Therefore, an air suction seed metering device seed feeding adjustment mechanism is provided.

[0003] For example, the product with announcement number "CN219352342U" uses a flexible claw and rack-and-pinion positioning method. The adjustment and movement of the flexible claw drives the seed feeding adjustment plate to move up and down within the seed chamber of the air-suction seed metering device via the base plate. This achieves and completes the control of the height of the seeds fed into the seed chamber; that is, a higher seed surface results in a larger seed feeding amount, and a lower seed surface results in a smaller seed feeding amount. It features a novel, unique, simple, and reasonable structure, easy, convenient, and quick adjustment and operation, and high adjustment accuracy, providing technical support for ensuring and improving the operational quality and effect of air-suction seed metering devices. However, in the above method, only the size of the discharge outlet is controlled by the seed feeding adjustment plate to control the amount of seed discharged. During operation, a large amount of seeds accumulates at the discharge outlet. Due to the principle of friction, the probability of seed blockage is relatively high, requiring multiple unblocking operations by the operator, thus reducing work efficiency. Summary of the Invention

[0004] This invention aims to solve the problems existing in the prior art by providing a seed feeding quantity adjustment mechanism for a pneumatic seed metering device. Through the seed feeding quantity adjustment structure, an electric telescopic rod drives the second cylinder to move between rubber cylinders, adjusting the size of the through hole for adsorbing seeds, thereby adjusting the seed feeding quantity. Then, a first motor drives the second cylinder, which has a negative pressure inside, to rotate, adsorbing the seeds onto the mesh plate on the inner wall of the second cylinder for conveying, avoiding the accumulation of a large number of seeds and causing blockage, and effectively improving work efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This air suction seed metering device has a seed feeding amount adjustment mechanism, including a shell inlet, the upper end of the inner wall of the shell is fixedly connected to the inlet, the right side of the outer wall of the shell is provided with a seed feeding amount adjustment structure, the lower left end of the shell is fixedly connected to the air inlet pipe, and the lower end of the inner wall of the shell is fixedly connected to the vertical pipe.

[0006] To further improve the structure, the seed feeding adjustment mechanism includes a first motor, a first cylinder fixedly connected to the output shaft end of the first motor, two sliding rods fixedly connected to the right side of the inner wall of the first cylinder, the inner wall of the first cylinder and the outer wall of the sliding rods slidably connected to a crossbar, a second cylinder fixedly connected to the left end of the crossbar, the outer wall of the second cylinder sealed to two rubber cylinders, and an electric telescopic rod fixedly connected to the left side of the inner wall of the outer shell, the output shaft end of the electric telescopic rod being rotatably connected to the second cylinder through a sealed bearing.

[0007] Further improvements include a first motor outer wall fixedly connected to the outer casing via a bracket, and a first cylinder outer wall rotatably connected to the outer casing via a bearing.

[0008] To further improve the design, multiple mesh panels are fixedly connected to the inner wall of the second cylinder.

[0009] To further improve the design, the ends of the two rubber cylinders are rotatably connected to the outer casing via sealed bearings.

[0010] The beneficial effects of this utility model are as follows: Through the seed feeding adjustment structure, the first motor drives the cylinder to rotate within the outer shell via bearings. This rotation of the cylinder drives the slide bar, crossbar, and second cylinder to rotate. The rotation of the second cylinder, through friction, drives the rubber cylinder to rotate within the outer shell via sealed bearings. During this process, the second cylinder can rotate at the output end of the electric telescopic rod via sealed bearings. Activating the electric telescopic rod drives the second cylinder to move to the right within the two rubber cylinders. When the large through-hole on the left side of the second cylinder is located between the two rubber cylinders, the electric telescopic rod drives the second cylinder to move between the rubber cylinders, adjusting the size of the through-hole for seed adsorption, thereby adjusting the seed feeding quantity. Then, the first motor drives the second cylinder, which has internal negative pressure, to rotate, adsorbing the seeds onto the mesh plate on the inner wall of the second cylinder for transport, preventing large seed accumulation and blockage, and effectively improving work efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A front sectional view; Figure 3 for Figure 2 Left sectional view; Figure 4 for Figure 2 Enlarged view of A in the middle; Figure 5 for Figure 2 A magnified view of B in the middle.

[0012] Explanation of reference numerals in the attached drawings: 1. Feeding quantity adjustment structure; 101. First motor; 102. First cylinder; 103. Slide rod; 104. Crossbar; 105. Second cylinder; 106. Electric telescopic rod; 107. Rubber cylinder; 2. Outer shell; 3. Feed inlet; 4. Air inlet pipe; 5. Mesh plate; 6. Vertical pipe. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1-5 In this embodiment, the outer shell 2 includes a feed inlet 3. The upper end of the inner wall of the outer shell 2 is fixedly connected to the feed inlet 3. The right side of the outer wall of the outer shell 2 is provided with a feeding amount adjustment structure 1. The lower left end of the outer shell 2 is fixedly connected to the air inlet pipe 4. The lower end of the inner wall of the outer shell 2 is fixedly connected to the vertical pipe 6. The outer wall of the first motor 101 is fixedly connected to the outer shell 2 via a bracket. The outer wall of the first cylinder 102 is rotatably connected to the outer shell 2 via a bearing. The first cylinder 102 can rotate inside the outer shell 2 via a bearing. Multiple mesh plates 5 are fixedly connected to the inner wall of the second cylinder 105. The mesh plates 5 are made of stainless steel plates with through holes on the surface. The ends of the two rubber cylinders 107 are rotatably connected to the outer shell 2 via sealed bearings.

[0014] See attached document Figure 1-5 The seed feeding adjustment structure 1 includes a first motor 101, which is a servo motor. The output shaft of the first motor 101 is fixedly connected to a first cylinder 102. Two slide rods 103 are fixedly connected to the right side of the inner wall of the first cylinder 102. The inner wall of the first cylinder 102 and the outer wall of the slide rods 103 are slidably connected to a crossbar 104. The crossbar 104 can slide on the outer wall of the slide rods 103 and the inner wall of the first cylinder 102. A second cylinder 105 is fixedly connected to the left end of the crossbar 104. The outer wall of the second cylinder 105 is sealed to two rubber cylinders 107. The second cylinder 105 can move inside the two rubber cylinders 107 while ensuring relative sealing. An electric telescopic rod 106 is fixedly connected to the left side of the inner wall of the outer shell 2. The electric telescopic rod 106 can meet the actual needs of the work. The output shaft end of the electric telescopic rod 106 is rotatably connected to the second cylinder 105 through a sealed bearing. The second cylinder 105 can rotate through the sealed bearing at the output end of the electric telescopic rod 106.

[0015] Working principle: Pneumatic seed metering device seed feeding operation: When using the air-suction seed metering device for seed feeding, firstly, pour an appropriate amount of seeds into the outer casing 2 through the feed inlet 3. Then, connect the air inlet pipe 4 to the external exhaust fan on the air-suction seed metering device. Start the external exhaust fan to draw air from the outer casing 2 and the second cylinder 105 through the air inlet pipe 4, creating negative pressure. Next, connect the external power supply to the first motor 101. The first motor 101 starts, driving the cylinder 102 to rotate within the outer casing 2 via bearings. The rotation of the cylinder 102 drives the slide bar 103, the crossbar 104, and the second cylinder 105 to rotate. The rotation of the second cylinder 105 is achieved through friction. The force drives the rubber cylinder 107 to rotate inside the outer shell 2 via a sealed bearing. During this process, the second cylinder 105 can rotate at the output end of the electric telescopic rod 106 via a sealed bearing. At the same time, the negative pressure generated inside the second cylinder 105 will draw air through multiple through holes machined on the outer wall of the second cylinder 105, thereby adsorbing the seeds onto the mesh plate 5 on the inner wall of the second cylinder 105. The seeds adsorbed by the second cylinder 105 are then transferred to the vertical pipe 6, and the adsorbed seeds are scraped into its interior through the upper end of the vertical pipe 6. The vertical pipe 6 is connected to the external seed feeding pipe, thus enabling the seed feeding operation.

[0016] The seed feed rate adjustment of the air-suction seed metering device: When adjusting the seed feeding amount using the air suction seed metering device, connect the external power supply to the electric telescopic rod 106. The electric telescopic rod 106 starts and drives the second cylinder 105 to move to the right within the two rubber cylinders 107. When the large through hole on the left side of the second cylinder 105 is between the two rubber cylinders 105, the electric telescopic rod 106 stops moving. At this time, the small through hole on the right end of the second cylinder 105 will be sealed by the rubber cylinder 107, and the seeds will be adsorbed and fed through the large through hole on the left side of the second cylinder 105. By adjusting the position of the second cylinder 105 and adsorbing and feeding seeds through through holes of different sizes, the seed feeding amount can be adjusted.

[0017] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A seed feeding adjustment mechanism for a pneumatic seed metering device, comprising a housing (2) and a feed inlet (3), wherein the upper end of the inner wall of the housing (2) is fixedly connected to the feed inlet (3), characterized in that: The outer wall of the outer shell (2) is provided with a feeding amount adjustment structure (1) on the right side. The lower left end of the outer shell (2) is fixedly connected to the air inlet pipe (4), and the lower inner wall of the outer shell (2) is fixedly connected to the vertical pipe (6).

2. The seed feeding rate adjustment mechanism of the air-suction seed metering device according to claim 1, characterized in that: The seed feeding adjustment structure (1) includes a first motor (101), the output shaft end of the first motor (101) is fixedly connected to a first cylinder (102), two slide rods (103) are fixedly connected to the right side of the inner wall of the first cylinder (102), the inner wall of the first cylinder (102) and the outer wall of the slide rods (103) are slidably connected to a crossbar (104), the left end of the crossbar (104) is fixedly connected to a second cylinder (105), the outer wall of the second cylinder (105) is sealed to two rubber cylinders (107), the left side of the inner wall of the outer shell (2) is fixedly connected to an electric telescopic rod (106), the output shaft end of the electric telescopic rod (106) is rotatably connected to the second cylinder (105) through a sealed bearing.

3. The seed feeding rate adjustment mechanism of the air-suction seed metering device according to claim 2, characterized in that: The outer wall of the first motor (101) is fixedly connected to the outer shell (2) through a bracket, and the outer wall of the first cylinder (102) is rotatably connected to the outer shell (2) through a bearing.

4. The seed feeding rate adjustment mechanism of the air-suction seed metering device according to claim 2, characterized in that: Multiple mesh plates (5) are fixedly connected to the inner wall of the second cylinder (105).

5. The seed feeding rate adjustment mechanism of the pneumatic seed metering device according to claim 2, characterized in that: The ends of the two rubber cylinders (107) are rotatably connected to the outer casing (2) via sealed bearings.

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