Seed metering device for plot seeder

Abstract

The utility model relates to a seed metering device for a plot seeder. The seed metering device mainly comprises a combined box body, a seed metering wheel, a seed cleaning brush wheel, a seed cleaning gear and the like, wherein the seed metering wheel, the seed cleaning brush wheel and the seed cleaning gear are arranged on the box body. And the seed-metering device is fixedly connected with a front guide pillar and a rear guide pillar on the frame of the seeding machine through a front locking guide sleeve and a rear locking guide sleeve which are provided with spring pins. During operation, power is transmitted to the gear assembled on the rack through a land wheel of the seeder, the gear on the rack is meshed with the seed cleaning gear fixedly arranged on the seed metering device, the seed metering wheel and the seed cleaning brush wheel are driven to rotate through chain transmission, seeds fall into holes under the action of gravity, redundant seeds on the holes are cleaned by the brush wheel, and the seeds are put into seed ditches through the seed protection plate. The seed metering process is completed.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery. Specifically, it relates to a seed metering device for a small-area seeder, which can meet the sowing needs of different varieties of crops or the requirements of different cultivation techniques through simple assembly. Background Technology

[0002] Seed quality is fundamental to ensuring a bumper harvest, and the performance of the plot seeder is essential for the breeding of new varieties. Plot seeders are specialized machines used in field trials for breeding new varieties, propagating superior seeds, and conducting variety comparisons. Due to differences in sowing techniques across regions, precision sowing methods include double-row sowing on ridges, single-row sowing, and hill sowing. Furthermore, the 100-seed weight varies among different experimental varieties. Relying solely on individual adjustments using corresponding seed metering devices is not only costly but also wasteful of resources. In agricultural experimental plots, crops are sown in many sections, requiring frequent seed cleaning and replacement. Currently, manual seed placement is commonly used in China, which is inefficient, expensive, and difficult to guarantee in terms of quality.

[0003] To address the problem of mechanical sowing in experimental plots, this utility model mainly targets the seed metering device (such as...) in plot seeders. Figure 1 The innovative design of the small-area seeder features a modular structure for the seed metering unit. Through simple assembly, it can meet the sowing needs of different soybean varieties or the requirements of different cultivation agronomic techniques. Summary of the Invention

[0004] This invention relates to a seed metering device for a small-area seeder, the core component of which is the overall structure of a breeding insert-type seed metering device (e.g., ...). Figure 1 ,like Figure 2 The main components are a modular housing 1 and seed metering wheels 11, seed cleaning brush wheels 9, and seed cleaning gears 6 mounted on the housing. The seed metering device is connected and fixed to the front and rear guide columns on the seeder frame via locking front guide sleeves 2 and rear guide sleeves 4 with spring pins 3. During operation, power is transmitted from the seeder's ground wheels to the gears mounted on the frame. The gears on the frame mesh with the seed cleaning gears fixed on the seed metering device, driving the seed metering wheels 11 and seed cleaning brush wheels 9 to rotate via chain drive. Seeds fall into the seed holes by gravity, and the brush wheels remove excess seeds from the seed holes. After passing through the seed guard plate 5, the seeds are placed into the seed furrow, completing the seed metering process.

[0005] Double-row seeder box (e.g.) Figure 3The device consists of three parts: a left panel (1), a right panel (3), and a central seed guide assembly block (2). The edges of the left and right panels are connected to the sides of the central seed guide assembly block by overlapping. To ensure the stability of the device, the upper left and right sides of the device have through-hole bosses, which are secured with long bolts. The central seed guide assembly block divides the seed metering device into two completely independent and identical seed metering chambers. The seed metering chambers have a tapered structure, which facilitates the introduction of seeds into the holes and prevents intermittent seed filling and incomplete seed metering during sowing.

[0006] Single-row seed metering unit housing on ridges (e.g.) Figure 4 The seed metering device consists of four parts: a left panel (1), a right panel (3), a middle baffle (5), and an adjusting baffle (4). The left and right panels are identical to the side panels of the double-row seed metering device, each with a 2.5mm wide and 3mm deep inlay groove on its connecting side. The middle baffle is embedded in the groove where the two side panels overlap. The device is secured with bolts by connecting the perforated bosses on the upper left and right sides of the box. The lower hole of the adjusting baffle is hinged to the left and right panels, and the upper hole is fixed to either the left or right panel with a pin. The middle baffle and the adjusting baffle divide the seed metering device into two independent chambers. In this single-row combined box structure, both seed metering chambers can be equipped with seed metering wheels of different hole sizes simultaneously. The desired seed metering chamber is selected by fixing the position of the adjusting baffle. Attached Figure Description

[0007] Appendix Figure 1 Schematic diagram of the insert-type seed metering device (main view)

[0008] Appendix Figure 2 Side view of the schematic diagram of the insert-type seed metering device

[0009] Appendix Figure 3 Front and side views of the double-row box structure on the ridge

[0010] Appendix Figure 4 Side view of a single-row box structure on a ridge

[0011] Appendix Figure 5 Schematic diagram of the insert structure

[0012] Appendix Figure 6 : Simplified diagram of the frame structure

[0013] Appendix Figure 7 Seeder side view

[0014] Appendix Figure 1 Appendix Figure 2 In the middle: 1. Box body 2. Front guide sleeve 3. Spring pin 4. Rear guide sleeve 5. Seed protection plate 6. Seed cleaning gear 7. One-way clutch 8. Seed cleaning shaft 9. Seed cleaning brush wheel 10. Seed dispensing shaft 11. Seed dispensing wheel.

[0015] Appendix Figure 3 Appendix Figure 4In the middle: 1. Left panel of the box 2. Middle guide block 3. Right panel of the box 4. Adjusting baffle 5. Fixed baffle.

[0016] Appendix Figure 5 In the middle: 1. Spring pin 2. Front guide post 3. Guide sleeve 4. Front guide sleeve 5. Rear guide post 6. Rear guide sleeve

[0017] Appendix Figure 6 Appendix Figure 7 In the middle: 1. Frame 2. Rack 3. Guide gear 4. Frame gear 5. Front guide column 6. Rear guide column 7. Seed cleaning gear 8. Seed cleaning sprocket 9. Seed metering sprocket Detailed Implementation

[0018] 1) In breeding trials, different varieties exist in different plots, requiring frequent seed cleaning and replacement operations during sowing. Therefore, the seed metering device for breeding must be quick to install and disassemble with the frame to facilitate seed cleaning and replacement operations. To meet these requirements, this design uses a plug-in structure for the seed metering device connection, such as... Figure 5 As shown, the seed metering device is equipped with a front guide sleeve 4 and a rear guide sleeve 6. A threaded sleeve 3 is welded onto the front guide sleeve to position the spring pin 1. A tapered groove is machined on the mating guide pin 2. The locking force of the spring pin and the weight of the seed metering device housing ensure stable transmission during operation, preventing bouncing during gear meshing. For cleaning and seed changing, simply lift the seed metering assembly vertically upwards, empty the remaining seeds, and insert the new variety.

[0019] 2) In breeding trials, where the row length of the plots is short and seed varieties need to be frequently changed, a period of empty travel occurs in the plot from the time the seed metering device fills the plot to the time the first seed is dropped. Breeding agronomic requirements stipulate that this empty travel distance should be controlled within 0.5 meters. Therefore, to control the empty travel phenomenon in different experimental plots, a seed metering device positioning and guiding mechanism was designed on the frame. For example... Figure 6 As shown. On the frame 1, a rack 2 and a guide gear 3 are fixedly mounted as the positioning and guiding mechanism for the seed metering device. For the seed metering device to connect correctly with the front guide post 5 and the rear guide post 6 on the frame, its seed cleaning gear 7 must pass through the positioning and guiding mechanism (such as...). Figure 7 When the seed cleaning gear 7 rotates through the guide mechanism, it drives the coaxial seed cleaning sprocket 8 to rotate, which in turn drives the seed metering sprocket 9 to rotate via chain drive, thus allowing the coaxial seed metering wheel to fill with seeds in advance. This achieves control over the empty stroke of the seed dropping mechanism. This structure is simple and convenient to operate and can effectively meet the requirements of breeding experiments.

[0020] Finally, it should be noted that the above technical features constitute the best embodiment of this utility model, which has strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A seed metering device for a small-area seeder, mainly composed of a modular housing and seed metering wheels, seed cleaning brush wheels, and seed cleaning gears mounted on the housing, characterized in that... The seed metering device is connected to the front and rear guide posts on the seeder frame by means of locking front and rear guide sleeves with spring pins.

2. The seed metering device for a plotter seeder according to claim 1, characterized in that: Power is transmitted from the seeder's ground wheels to the gears mounted on the frame. The gears on the frame mesh with the seed cleaning gears fixed on the seed metering device, driving the seed metering wheel and the seed cleaning brush wheel to rotate via chain drive.

3. A seed metering device for a plotter seeder according to claim 1, characterized in that: The double-row seeder box on the ridge consists of three parts: the left plate of the box, the right plate of the box, and the middle seed guide assembly block.

4. A seed metering device for a plotter seeder according to claim 1, characterized in that: The single-row seeder box for ridges consists of four parts: the left panel, the right panel, the middle baffle, and the adjusting baffle.

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