Air suction type interval seed metering device

Abstract

The invention provides an air suction type spaced seed metering device which comprises a machine shell, a negative pressure cavity in the machine shell, a seed containing cavity and a seed falling opening, and further comprises a seed suction disc and a seed guide disc which are rotationally assembled in the machine shell and are in the same rotation direction, a disc body of the seed guide disc is partially overlapped with the seed suction disc, so that the seed guide tooth grooves, which are screwed upwards and close to the top edge, of the seed guide disc are intersected with the adsorption holes, which are screwed upwards and close to the top edge, of the seed suction disc in a one-to-one correspondence manner. According to the technical scheme, the stroke path from the seed negative pressure adsorption section to the seed guide tooth groove section is greatly shortened, the accuracy and reliability of quantitative interval seed metering operation are effectively improved, the seeding operation efficiency is also effectively improved, meanwhile, the technical advantage of lower operation energy consumption is achieved, the assembly structure is compact, and the size is small.

Description

Technical Field

[0001] The invention relates to a sowing device for planting seeds under arable land, in particular to an air suction sowing device with an interval quantitative function. Background Art

[0002] my country is vigorously promoting air-suction seeders, which are mainly used for large-scale sowing of seeds including peanuts, corn, soybeans and other grains larger than the particle size. The main components include a seed suction disc and a seed guide wheel. One side of the seed suction disc is a negative pressure chamber and the other side is a seed storage chamber. The seed suction disc, the seed guide wheel and the pressure relief are coordinated to achieve quantitative and intermittent sowing and dropping of seeds, such as the air suction seeder disclosed in the patent document CN20453798U. However, the existing air suction seeding device has a seed drop structure in which the seed guide wheel is installed under the seed suction disc, which easily causes similar seeds to fall into a seed filling groove of the seed guide wheel together with gravity, rotational inertia and other effects, resulting in a difference between the actual seed drop number and the set sowing number, and an inaccurate seed drop number. In addition, in order to ensure the accuracy and reliability of sowing work, the existing seeding device needs to be equipped with a strong negative pressure to maintain the long rotation distance of the adsorbed seeds to reach the seed guide wheel below, which has technical problems such as high energy consumption, easy inhalation of impurities during sowing, serious impact on sowing work and large equipment volume. Summary of the invention

[0003] The purpose of the present invention is to reduce the volume of the device, reduce the negative pressure workload, and more importantly, to improve the accuracy of sowing quantity, and to provide an air-suction type interval seeding device.

[0004] The technical solution of the air-suction type interval seeding device provided by the present invention mainly comprises: an air-suction type interval seeding device, which comprises a housing, a negative pressure chamber, a seed receiving chamber and a seed drop port in the housing, and also comprises a seed suction disk and a seed guide disk which are rotatably assembled in the housing and have the same rotation direction; The seed suction disc has a plurality of suction holes evenly distributed on the disc with equal center distances; The seed receiving chamber and the negative pressure chamber are opposite to each other and are respectively located on the two sides of the seed suction disc, and are arranged opposite to each other at the traces of the adsorption holes on the seed suction disc, and are slidably matched with the seed suction disc; The upper limit position of the negative pressure chamber is close to the upper spiral edge of the seed suction disc; The seed guide disc has seed guide tooth grooves evenly distributed on its circumference; its disc body is parallel to the seed suction disc and partially overlaps, so that the teeth on the upper rotation close to the top edge are inserted between the adsorption holes on the upper rotation close to the top edge of the seed suction disc, and the seed guide tooth grooves are formed near the top edge section corresponding to the adsorption holes.

[0005] One preferred option of the above overall technical solution is that the negative pressure chamber is in sealing and sliding cooperation with the seed suction disc.

[0006] One preferred option of the above overall technical solution is that the bottom edge of the negative pressure chamber is preferably located at the middle horizontal position of the spiral track of the seed suction disc.

[0007] One of the preferred options of the above-mentioned overall technical solution is that the bottom edge of the seeding cavity is preferably not higher than the bottom edge of the negative pressure cavity.

[0008] One preferred option of the above overall technical solution is that an intermediate belt shaft is rotatably arranged on the casing, and the intermediate belt shaft serves as an intermediate transmission shaft, and its two shaft ends are respectively connected to the seed suction disk and the seed guide disk for transmission.

[0009] One preferred option of the above overall technical solution is that the seed guide grooves close to the top edge correspond to the adsorption holes on the seed suction disc close to the top edge, one groove corresponds to one hole, or one groove corresponds to N holes according to the number of seeds sown at one time.

[0010] The technical scheme of the air-suction type interval seeding device disclosed in the present invention, wherein the seed suction disc and the seed guide disc adopt an overlapping structure with the top edges intersecting, the first step is that the seed suction disc rotates upward through the seed receiving cavity to absorb the seed particles, and the seed guide tooth groove of the seed guide disc rotates to the absorption hole where the seed particles are absorbed and are about to leave the negative pressure cavity, the second step is that the absorption hole of the seed suction disc with the seed particles rotates to leave the negative pressure cavity, and the seed particles thereon lose the negative pressure effect and fall into the corresponding seed guide tooth grooves that rotate to, and then go from the seed guide disc to the lower rotating side, and finally fall to the ground from the seed drop port for sowing, and so on. This technical scheme greatly shortens the travel path from the seed negative pressure absorption section to the section where the seed particles fall into the seed guide tooth groove, which not only effectively improves the accuracy and reliability of the quantitative interval seeding operation, but also effectively improves the efficiency of the sowing operation, and more importantly, solves the technical problems of the existing technology of large negative pressure energy consumption, easy inhalation of impurities, and serious impact on the continuity of sowing work and equipment life, and has the technical advantages of low operating energy consumption, compact assembly structure, and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 and Figure 2 They are front and rear stereograms of the present invention respectively.

[0012] Figure 3 It corresponds to Figure 1 Internal structure diagram of the direction.

[0013] Figure 4 It is a three-dimensional diagram of the internal assembly structure of the present invention. DETAILED DESCRIPTION

[0014] The technical content of the present air-suction type interval seeding device will be described in detail below through an embodiment shown in the accompanying drawings, and its application technical effect will be explained.

[0015] The air suction type interval seeding device, such as Figure 1 and Figure 2As shown, it comprises a casing 3, a negative pressure chamber 11 in the casing 3, a seed receiving chamber 22 and a seed drop port, and also comprises a seed suction disc 1 and a seed guide disc 2 which are rotatably assembled in the casing 3 and have the same rotation direction.

[0016] The seed suction tray 1 is as follows Figure 3 As shown, the disc is evenly distributed with a circle of adsorption holes 10 with equal center distance, which are used to adsorb seeds under negative pressure.

[0017] See also Figure 3 , Figure 4 As shown, the seed receiving chamber 22 and the negative pressure chamber 11 are opposite to each other and are respectively located on both sides of the seed suction disc 1, and are slidably matched with the seed suction disc 1; wherein, the edge of the negative pressure chamber 11 is preferably sealed and slidably matched with the seed suction disc 1.

[0018] The negative pressure chamber 11 preferably covers the span of at least two to three adsorption holes 10 on the upper rotation part of the seed suction disc 1. Figure 4 In the direction shown, the seed suction disc 1 and the seed guide disc 2 rotate counterclockwise, and the negative pressure chamber 11 covers the seed suction disc 1 in an arc shape in the upward direction, that is, on the upper right side, with a hole spacing span of at least 2-3 adsorption holes 10, and the upper edge limit of the cavity is preferably close to the upper edge of the seed suction disc 1.

[0019] The negative pressure chamber 11 is connected to the negative pressure power unit through the negative pressure connecting pipe 18 .

[0020] The seed receiving chamber 22 is a seed receiving chamber located on the other side of the seed suction disc 1 opposite to the negative pressure chamber 11, and has a seed adding port at the bottom. When the sowing operation is ready, the required sowing amount is added to the seed receiving chamber 22.

[0021] like Figure 4 As shown, the bottom edge limit of the negative pressure chamber 11 is preferably at the middle horizontal position of the upward rotation trajectory; the bottom edge of the seeding chamber 22 is preferably not higher than the bottom edge of the negative pressure chamber 11.

[0022] The seed guide disc 2 has seed guide tooth grooves 20 evenly distributed around its circumference for collecting quantitative seeds; its tooth disc is parallel to the seed suction disc 1 and partially overlaps with it. Figure 4 As shown, the seed guide disc 2 covers the lower semicircular disc and the center of the circle of the seed suction disc 1. When the two discs rotate in the same direction, the teeth of the seed guide disc 2 close to the top edge are inserted between the adsorption holes 10 close to the top edge of the upper rotating disc 1, forming a one-to-one, one-to-two or one-to-N correspondence between the seed guide tooth grooves 20 and the adsorption holes 10 according to the number of sowing grains N at a time.

[0023] During the operation of the device, when the adsorption holes 10 on the upward rotation track of the seed suction disc 1 pass through and leave the seed receiving chamber 22, due to the continuous negative pressure, one grain is adsorbed thereon one by one, and when it continues to rotate upward and leaves the upper edge limit of the negative pressure chamber 11, these adsorption holes 10 lose the negative pressure. At this time, the seed guide tooth grooves 20 of the seed guide disc 2 have also approached and reached the top edge, corresponding to the adsorption holes 10 that are about to lose the negative pressure. When the negative pressure is completely lost, the seeds adsorbed on the adsorption holes 10 fall into the corresponding seed guide tooth grooves 20 that are rotated thereto. As the seed guide disc 2 continues to rotate to the lower rotation section, the seeds contained therein fall out of the seed guide tooth grooves 20 and are dropped to the ground for sowing from the seed drop port, and this cycle repeats.

[0024] From the above, it can be seen that the travel distance between the seed particle negative pressure adsorption section and the quantitative seeding section of the seed guide tooth groove is greatly shortened compared with the existing technology, which not only effectively improves the accuracy and work efficiency of quantitative sowing, but also greatly reduces the required negative pressure power, greatly reduces the energy consumption of sowing operations, and achieves the technical purpose of energy saving and consumption reduction.

[0025] In this embodiment, the seed guide disc 2 is an active transmission component, and the seed suction disc 1 is a driven transmission component, and the two are connected by transmission via the intermediate belt shaft 12. The shaft end of the intermediate belt shaft 12 on the seed guide disc 2 side is connected to the pulley or sprocket belt or chain of the seed guide disc 2, and the shaft end of the suction disc 1 side is connected to the pulley or sprocket belt or chain of the suction disc 1. The power output main shaft 21 drives the seed guide disc 21, so that the suction disc 1 and the seed guide disc 2 can rotate synchronously in the same direction.

Claims

1. An air-suction type interval seeding device, comprising a housing (3), a negative pressure chamber (11) in the housing (3), a seed receiving chamber (22) and a seed drop port, and also comprising a seed suction disc (1) and a seed guide disc (2) rotatably assembled in the housing (3) in the same rotation direction; The seed suction disk has a plurality of suction holes (10) evenly distributed on the disk with equal center distances; It is characterized in that The seed receiving chamber (22) and the negative pressure chamber (11) are opposite to each other and are respectively located on two sides of the seed suction disc (1), and are arranged opposite to each other at the traces of the adsorption holes on the seed suction disc (1), and are slidably matched with the seed suction disc (1); The upper limit position of the negative pressure chamber (11) is close to the upper spiral edge of the seed suction disc (1); The seed guide disc (2) is evenly distributed on its circumference with seed guide tooth grooves (20); its disc body is parallel to and partially overlaps with the seed suction disc (1), so that the teeth on the upper rotation close to the top edge are inserted between the adsorption holes (10) on the upper rotation close to the top edge of the seed suction disc (1), and the seed guide tooth grooves (20) are formed near the top edge to correspond to the adsorption holes (10).

2. The air-suction type interval seeding device according to claim 1, characterized in that: The negative pressure chamber (11) is in sealing and sliding cooperation with the seed suction disc (1).

3. The air-suction type interval seeding device according to claim 1 or 2, characterized in that: The bottom edge of the negative pressure chamber (11) is preferably located at a middle horizontal position of the rotation path of the seed suction disc (1).

4. The air-suction type interval seeding device according to claim 3, characterized in that: The bottom edge of the seeding chamber (22) is preferably not higher than the bottom edge of the negative pressure chamber.

5. The air-suction type interval seeding device according to claim 1, characterized in that: An intermediate belt shaft (12) is rotatably arranged on the casing (3), and the intermediate belt shaft (12) serves as an intermediate transmission shaft, and two shaft ends thereof are respectively transmission-connected to the seed suction disc (1) and the seed guide disc (2).

6. The air-suction type interval seeding device according to claim 1, characterized in that: The seed guide tooth groove (20) near the top edge and the adsorption hole (10) near the top edge of the seed suction disc (1) are connected in a corresponding manner, one groove for one hole, or one groove for N holes according to the number of seeds sown at one time.

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