A toothed double-disc seeder with airflow guiding grooves

Abstract

This invention discloses a toothed double-disc seeder with airflow guiding grooves, comprising a seed metering device sealing baffle, a seed metering roller, toothed discs, and a non-circular shaft. The seed metering device sealing baffle is fixed to the non-circular shaft via a key connection. The toothed discs are connected to both ends of the non-circular shaft via bearings. The seed metering roller is movably connected to the non-circular shaft via bearings and fixedly connected to one side of the toothed disc via pins. This invention avoids the problem of incomplete or untimely seeding during high-speed operation of the seed meterer: the seed meterer rotates synchronously with the single-sided toothed disc, and the toothed disc intermittently forms holes. The seed meterer, guided by airflow, delivers the seeds, which are transported to the holes through a seed guide channel. This structure facilitates high-speed sowing and reduces the missed sowing rate.

Description

Technical Field

[0001] This invention relates to the field of seed metering technology, and in particular to a toothed double-disc seeder with airflow guiding grooves. Background Technology

[0002] Traditional duckbill seeders are widely used in various occasions due to their simple structure, good compatibility, and ease of use. However, the missed seeding rate of duckbill seeders increases significantly when operating at high speeds. Only at low speeds can they achieve a high seeding qualification rate, resulting in low seeding efficiency. In addition, the overall structure of the seeder is divided into a seed metering section and a seeding section, and the seed metering section of traditional seeders is generally more complex. Summary of the Invention

[0003] This invention provides a toothed double-disc seeder with airflow guiding grooves, which aims to solve or partially solve the problems existing in related technologies.

[0004] The objective of this invention is achieved through the following technical solution: A ring of airflow guiding grooves is formed in the middle of the outer circumference of the seed metering roller. During operation, an air pipe is connected to the frame connected to the bearing, and air blowing ports are opened at the top of the seed metering device and the seeding area. The airflow blown out flows with the airflow guiding grooves. The airflow blown out from the top of the seed metering device can replace the traditional seed cleaning brush to remove excess seeds in the holes, ensuring one seed per hole. At the same time, it can assist the seeds in falling in the seeding area, accelerate the seed falling, ensure the stability and accuracy of seed cleaning and seeding, and avoid the occurrence of double sowing and missed sowing. The airflow guide groove features a negative pressure suction-pull double-hole design. The outer hole of the double-hole is designed to mimic the shape of the seed, while the inner hole is an angled suction hole connected to the inner cavity of the seed metering roller. When the seed meterer picks up seeds, because the seed's shape corresponds to the outer hole of the double-hole, the seed first falls into the outer mimicry hole, while the inner suction hole holds the seed. When the adsorbed seed reaches the top air pipe opening, the airflow blown out through the air pipe blows away any excess seeds adsorbed by the double-hole, ensuring that only one seed is adsorbed per hole, achieving precise seed picking and cleaning. The seed metering roller has a hollow cavity inside, with grooves on the inner and outer walls of the open side of the cavity. Corresponding rubber sealing rings are placed in the grooves. The open side of the seed metering roller fits tightly with the sealing baffle of the seed meterer, sealing the sealing rings. A thin sheet extends from the lower part of the sealing baffle along the outer wall of the inner cavity of the seed metering roller to ensure the sealing of the double-hole from the completion of seeding to the start of seed picking, maintaining a stable air pressure difference between the inside and outside of the cavity.

[0005] The working process of this invention is as follows: Seeds enter the seed chamber through the upper seed inlet pipe, and are picked up by the negative pressure suction double holes on the seed dispensing roller; the airflow from the outside at the top air pipe inlet, guided by the airflow guide groove, blows off the excess seeds adsorbed on the double holes, ensuring that only one seed is picked up from each hole, thus achieving seed cleaning; during the seeding stage, the airflow blown out from the lower air inlet of the air pipe is guided by the airflow guide groove to assist in seeding, ensuring that the seeds fall in a timely and thorough manner. Under the combined action of their own gravity and the airflow assistance, the seeds fall into the seed guiding channel below, while the teeth of the toothed discs on both sides enter the soil to open a hole, and the seed guiding channel guides the seeds into the hole below, completing one sowing cycle. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of an explosion of a toothed double-disc seeder with airflow guiding grooves.

[0007] Figure 2 This is a schematic diagram of the seed metering roller.

[0008] Figure 3 This is a schematic diagram of the sealing baffle of the seed metering device.

[0009] Figure 4 This is a schematic diagram of the overall structure of a toothed double-disc seeder with airflow guide grooves.

[0010] In the diagram: 1-toothed disc, 2-irregular shaft, 3-seed metering roller, 4-seed metering device sealing baffle, 5-bearing, 6-shaft sleeve, 7, 8-sealing ring, 9-seed chamber, 10-air pipe, 11-seed guiding channel, 12-airflow guiding groove, 13-negative pressure suction and pull double hole. Detailed Implementation

[0011] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0012] The seed metering device is installed between two toothed discs (1). The two toothed discs (1) are fixed to the two ends of the irregular shaft (2) by bolts. The seed metering device is mainly composed of a seed metering device sealing baffle (4) and a seed metering roller (3). The lower part of the seed metering device sealing baffle (4) extends a thin sheet along the outer wall of the inner cavity of the seed metering roller (3) to ensure the sealing of the compound hole from the completion of seeding to the start of seed removal. The seed metering device sealing baffle is fixed to the irregular shaft (2) by a key connection. An airflow guide groove (12) is opened in the middle of the outer circumference of the seed metering roller (3). A negative pressure suction compound hole (13) is opened on the airflow guide groove. The outer hole of the compound hole is determined according to the... The seed shape is designed to mimic the shape of the seed. The inner hole of the compound hole is an air suction hole at a certain angle, which is connected to the inner cavity of the seed metering roller (3). The seed metering roller (3) is movably connected to the irregular shaft (2) through two bearings (2) and bushings (6). The inner and outer walls of the cavity on the open side are provided with grooves. Corresponding rubber sealing rings (7) and (8) are placed in the grooves respectively. They are fitted and squeezed to seal the sealing rings with the sealing baffle (4) of the seed meterer. The other side is fixedly connected to a toothed disc (1) on one side by a pin. The air pipe (10) is fixed on the frame that connects to the irregular shaft (2). One air pipe opening is above the seed metering roller (3), and the other air pipe opening is in the seeding area. During operation, seeds enter the seed chamber (9) through the upper seed inlet pipe, and the negative pressure suction pull double hole (13) on the seed dispensing roller (3) is used to pick up the seeds; the airflow from the outside at the top air pipe opening blows off the excess seeds adsorbed on the double hole under the guidance of the airflow guide groove, ensuring that only one seed is picked up from each hole, thus achieving seed cleaning; during the seeding stage, the airflow blown out from the air outlet at the lower end of the air pipe is guided by the airflow guide groove to assist in seeding, ensuring that the seeds fall in a timely and thorough manner. Under the combined action of their own gravity and the airflow assistance, the seeds fall into the seed guiding channel below, and at the same time, a pair of teeth on the toothed discs on both sides enter the soil to open a hole, and the seed guiding channel guides the seeds into the hole below, completing one sowing.

Claims

1. A toothed double-disc seeder with airflow guiding grooves, comprising a seed metering device sealing baffle, a seed metering roller, a toothed disc, a shaped shaft, an air pipe, and a seed guiding channel, characterized in that: The seed metering device is installed between two toothed discs, which are bolted to both ends of a shaped shaft. The number of compound holes on the seed metering device corresponds one-to-one with the number of teeth on the toothed discs. The seed metering device includes a seed metering device sealing baffle and a seed metering roller. The seed metering device sealing baffle is fixed to the shaped shaft by a key connection. The seed metering roller is movably connected to the shaped shaft by two bearings and bushings, and is fixedly connected to one side of the toothed disc by a pin, so that the seed metering roller rotates synchronously with the toothed disc on that side. An airflow guiding groove is formed in the middle of the outer circumference of the seed metering roller. The airflow guiding groove has negative pressure suction compound holes. The outer hole of the compound hole is designed according to the shape of the seed, and the inner hole of the compound hole is an inclined air suction hole that is connected to the seed. The inner cavity of the seed metering roller is interconnected; the inside of the seed metering roller is a hollow cavity, and grooves are provided on the inner and outer walls of the cavity on the open side. Corresponding rubber sealing rings are placed in the grooves respectively. The open side of the seed metering roller is fitted with the sealing baffle of the seed meterer and squeezes the rubber sealing rings to achieve a seal. A thin sheet extends from the lower part of the sealing baffle of the seed meterer along the outer wall of the inner cavity of the seed metering roller to ensure the sealing of the compound hole from the completion of seeding to the start of seed removal; the air pipe is fixed on the frame connected to the irregular shaft. One air pipe port is located at the top of the seed meterer, and the other air pipe port is located in the seeding area. The blown air flows with the airflow guide groove to blow off the excess seeds adsorbed on the compound hole at the top of the seed meterer and to assist the seeds in falling into the seed guide channel in the seeding area.

2. The toothed double-disc seeder with airflow guiding groove according to claim 1, characterized in that: The air inlet at the top of the seed metering device faces the airflow guide groove and is used to blow away excess seeds adsorbed on the compound holes under the guidance of the airflow guide groove, so as to ensure that only one seed is adsorbed in each compound hole; the air inlet in the seeding area faces the airflow guide groove and is used to assist in seeding under the guidance of the airflow guide groove, so as to ensure that the seeds fall in a timely and thorough manner.

3. The toothed double-disc seeder with airflow guiding groove according to claim 1, characterized in that: The outer hole of the compound hole is a contour hole that allows seeds to fall in first and is adapted to the shape of the seeds. The inner hole of the compound hole is an inclined air suction hole for sucking up the seeds that fall into the outer hole. When the adsorbed seeds are moved to the air pipe at the top of the seed metering device, the airflow blown out of the air pipe blows away the excess seeds adsorbed by the compound hole, thereby achieving precise seed picking and seed cleaning.

4. The toothed double-disc seeder with airflow guiding groove according to claim 1, characterized in that: During the sowing stage, the seeds fall into the seed-guiding channel below under the combined action of their own gravity and airflow. At the same time, a pair of teeth on the toothed discs on both sides enter the soil to open a hole, and the seed-guiding channel guides the seeds into the hole below, completing one sowing cycle.

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