Air suction type interval seed metering device

Abstract

The utility model provides an air suction type interval 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 assembled in the machine shell in a rotating mode and are in the same rotating 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 present patent application relates to a tilling seed sowing device, in particular to an air suction type seed sowing device with spacing and quantification functions. BACKGROUND

[0002] China is vigorously promoting air suction type seed metering device, which is mainly used for large area sowing of seed particles above the size of peanut, corn, soybean and the like. The composition mainly includes a suction seed disc and a seed guide wheel. One side of the suction seed disc is a negative pressure chamber, and the other side is a seed storage chamber. Through the suction seed disc, the seed guide wheel and the pressure relief cooperation, the quantitative and spaced seed sowing is realized. For example, the patent document CN20453798U discloses an air suction seed metering device. However, the existing air suction seed metering device installs the seed guide wheel transmission under the suction seed disc, which easily causes the similar seed particles to fall into the seed filling groove of the seed guide wheel together under the action of gravity and rotational inertia, resulting in the technical problems that the actual seed sowing quantity is different from the set seed sowing quantity, and the seed sowing quantity is not accurate. In addition, in order to ensure the accuracy and reliability of the sowing work, the existing seed metering device needs to be equipped with a relatively strong negative pressure to maintain the long rotation of the adsorbed seed particles to the seed guide wheel below, which has the technical problems of large operation energy consumption, easy absorption of impurities in sowing, serious influence on sowing work and large equipment volume. SUMMARY

[0003] The purpose of the present patent application is to reduce the device volume, reduce the negative pressure working load, and more importantly, to improve the accuracy of seed sowing quantification, and to provide an air suction type spacing seed metering device.

[0004] The technical scheme of the air suction type spacing seed metering device provided by the present patent application mainly includes the following technical contents: an air suction type spacing seed metering device, which comprises a machine shell, a negative pressure cavity in the machine shell, a seed receiving cavity and a seed dropping port, and further comprises a suction seed disc and a seed guide disc rotatingly assembled in the machine shell and rotating in the same direction.

[0005] The suction seed disc is provided with a plurality of adsorption holes with equal center distance on the disc.

[0006] The seed receiving cavity and the negative pressure cavity are opposite to each other and respectively located on the two sides of the suction seed disc, and are arranged opposite to the adsorption hole track on the suction seed disc in sliding cooperation with the suction seed disc.

[0007] The upper edge limit of the cavity of the negative pressure cavity is close to the upper rotation top edge of the suction seed disc.

[0008] The seed guide disc is provided with seed guide tooth grooves uniformly distributed on the circumference. The disc body of the seed guide disc is parallel to and partially overlaps with the suction seed disc, so that the teeth near the upper rotation top edge of the seed guide disc are inserted between the adsorption holes near the upper rotation top edge of the suction seed disc, and the seed guide tooth grooves and the adsorption holes correspond to each other in the upper rotation top edge segment.

[0009] One of the preferred options of the above-mentioned overall technical scheme is that the negative pressure cavity is in sealing sliding cooperation with the suction seed disc.

[0010] One preferred option of the above overall technical solution, the bottom edge of the negative pressure cavity is preferably located at the middle horizontal position of the seed suction disc rotation track.

[0011] One preferred option of the above overall technical solution, the bottom edge of the seed suction cavity is preferably not higher than the bottom edge position of the negative pressure cavity.

[0012] One preferred option of the above overall technical solution, the middle shaft is rotatably arranged on the machine shell, and the middle shaft serves as an intermediate transmission shaft, with both shaft ends being in transmission connection with the seed suction disc and the seed guide disc.

[0013] One preferred option of the above overall technical solution, the seed guide tooth groove close to the top edge is in one-to-one correspondence with the suction hole close to the top edge of the seed suction disc, or one groove corresponds to N holes according to the number N of seeds to be planted in one operation.

[0014] The technical solution of the air-suction type interval seed spacing device disclosed in the patent application, wherein the seed suction disc and the seed guide disc adopt an overlapping structure with the top edges interlocking, the first step is to rotate the seed suction disc through the seed suction cavity to adsorb the seeds, and the seed guide tooth groove of the seed guide disc has rotated to the position below the suction hole of the seed suction disc that has adsorbed the seeds and is about to leave the negative pressure cavity, the second step is that the suction hole of the seed suction disc with the seeds rotates away from the negative pressure cavity, and the seeds on it fall into the corresponding seed guide tooth groove due to the loss of negative pressure, then the seed guide disc rotates to the lower side, and finally the seeds fall into the seed drop hole and are planted on the ground, and the process is repeated. The technical solution greatly shortens the travel path from the seed negative pressure adsorption section to the seed falling into the seed guide tooth groove section, not only effectively improves the precision and reliability of the quantitative interval seed spacing operation, but also effectively improves the seeding efficiency, and more importantly, solves the technical problems of large negative pressure energy consumption, easy absorption of impurities, and serious impact on the continuity of the seeding work and the service life of the equipment, and has the technical advantages of low operation energy consumption, compact assembly structure, and small size. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 and Figure 2 are the front and rear perspective views of the patent application.

[0016] Figure 3 is the internal structure view in the corresponding Figure 1 direction.

[0017] Figure 4 is the internal overall assembly structure perspective view of the patent application. DETAILED DESCRIPTION

[0018] The technical content of the air-suction type interval seed spacing device will be described in detail below through an embodiment shown in the drawings, and the application technical effects will be explained.

[0019] The air-suction type interval seed spacing device, such as Figure 1 andFigure 2 As shown in the figure, the structure comprises a casing 3, a negative pressure cavity 11 in the casing 3, a seed receiving cavity 22 and a seed dropping port, and further comprises a seed sucking disc 1 and a seed guiding disc 2 which are assembled in the casing 3 in the same rotation direction.

[0020] The seed sucking disc 1, as shown in the figure, is provided with a plurality of adsorption holes 10 with equal center distance on the disc for adsorbing seeds under the action of negative pressure. Figure 3 As shown in the figure, the disc is provided with a plurality of adsorption holes 10 with equal center distance for adsorbing seeds under the action of negative pressure.

[0021] As shown in the figure, Figure 3 , Figure 4 As shown in the figure, the seed receiving cavity 22 and the negative pressure cavity 11 are opposite to each other and are respectively located on both sides of the seed sucking disc 1 and are in sliding cooperation with the seed sucking disc 1; wherein the edge of the negative pressure cavity 11 is preferably in sealing sliding cooperation with the seed sucking disc 1.

[0022] The negative pressure cavity 11 covers the seed sucking disc 1 and the rotation part of the disc is preferably not less than two to three adsorption hole 10 hole distance span range. Figure 4 As shown in the figure, the seed sucking disc 1 and the seed guiding disc 2 are rotated in the counterclockwise direction, the negative pressure cavity 11 covers the seed sucking disc 1 in the counterclockwise direction, that is, the right upper side, and the hole distance span of at least two to three adsorption holes 10, the upper limit of the cavity body is preferably close to the top edge of the seed sucking disc 1.

[0023] The negative pressure cavity 11 is communicated with the negative pressure power part gas path through the negative pressure connecting pipe 18.

[0024] The seed receiving cavity 22 is opposite to the negative pressure cavity 11 and is located on the other side of the seed sucking disc 1, and the seed receiving cavity 22 is provided with a seed adding port at the bottom. When the seeding operation is prepared, the required seeding amount is added in the seed receiving cavity 22.

[0025] As shown in the figure, Figure 4 As shown in the figure, the bottom edge of the negative pressure cavity 11 is preferably at the middle horizontal position of the counterclockwise track; and the bottom edge of the seed receiving cavity 22 is preferably not higher than the bottom edge of the negative pressure cavity 11.

[0026] The seed guiding disc 2 is provided with a plurality of seed guiding tooth grooves 20 for containing a certain amount of seeds; the tooth disc is parallel to the disc of the seed sucking disc 1 and is partially overlapped, as shown in the figure, Figure 4 As shown in the figure, the seed guiding disc 2 covers the counterclockwise semicircular disc of the seed sucking disc 1 and the center 17, and in the same direction rotation of the two discs, the teeth close to the top edge of the seed guiding disc 2 are inserted between the adsorption holes 10 close to the top edge of the seed sucking disc 1, forming the seed guiding tooth groove 20 and the adsorption hole 10 or one-to-one, one-to-two or according to the number N of seeds per seeding, one-to-N.

[0027] In the operation of the device, the adsorption holes 10 on the rotating track of the seed suction disc 1 pass through and leave the seed pile in the seed suction cavity 22. Due to the continuous negative pressure effect, a seed is adsorbed on each adsorption hole 10. The adsorption holes 10 lose the negative pressure when they continue to rotate and reach the limit of the upper edge of the negative pressure cavity 11. At this time, the seed guiding teeth grooves 20 of the seed guiding disc 2 have also approached and reached the top edge, corresponding to the adsorption holes 10 that lose the negative pressure effect. When the adsorption holes 10 completely lose the negative pressure effect, the seed adsorbed on the adsorption holes 10 falls into the corresponding seed guiding teeth grooves 20 that rotate to, and the seed in the seed guiding teeth grooves 20 falls out from the seed guiding teeth grooves 20 as the seed guiding disc 2 continues to rotate to the lower rotation section, and the seed falls through the seed falling port and is sown on the ground. The above process is repeated.

[0028] As can be seen from the above, the travel distance between the seed negative pressure adsorption section and the seed guiding teeth groove quantitative seed dropping section is greatly shortened compared to the prior art. This not only effectively improves the accuracy and work efficiency of quantitative sowing, but also greatly reduces the required negative pressure power, thereby greatly reducing the energy consumption of the sowing operation, achieving the technical purpose of energy saving and consumption reduction.

[0029] In the embodiment, the seed guiding disc 2 is a driving transmission member, and the seed suction disc 1 is a driven transmission member. The two are drivingly connected through the intermediate belt shaft 12. The seed guiding disc 2 side shaft end of the intermediate belt shaft 12 is drivingly connected with the seed guiding disc 2 belt wheel or chain wheel through a belt or chain, and the adsorption disc 1 side shaft end is drivingly connected with the adsorption disc 1 belt wheel or chain wheel through a belt or chain. The power output main shaft 21 drives the seed guiding disc 2, so that the seed suction disc 1 and the seed guiding disc 2 synchronously and in the same direction rotate and operate.

Claims

1. A pneumatic suction type interval seed metering device, comprising a housing (3), a negative pressure chamber (11), a seed receiving chamber (22) and a seed dropping port in the housing (3), and further comprising a seed suction plate (1) and a seed guide plate (2) rotatably assembled in the housing (3) in the same direction of rotation. The seed suction disc has a plurality of suction holes (10) evenly distributed on its disc with equal center distance. Its features are, The seed-accepting chamber (22) and the negative pressure chamber (11) are opposite to each other and located on both sides of the seed-suction plate (1). They are positioned opposite to each other at the suction hole tracks on the seed-suction plate (1) and slide in cooperation with the seed-suction plate (1). The negative pressure chamber (11) has its upper edge limit position close to the upper rotating edge of the seed suction plate (1); The seed guide plate (2) has seed guide grooves (20) evenly distributed on its circumference; its plate body is parallel to the seed suction plate (1) and partially overlaps with it, so that the teeth that are spiraling upwards and close to the top edge are inserted between the suction holes (10) that are spiraling upwards and close to the top edge of the seed suction plate (1), and the seed guide grooves (20) and the suction holes (10) are formed in the section close to the top edge.

2. The air-suction interval seeding device according to claim 1, characterized in that, The negative pressure chamber (11) is sealed and slides in conjunction with the seed suction plate (1).

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

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

5. The air-suction interval seeding device according to claim 1, characterized in that, The machine casing (3) is rotatably equipped with an intermediate belt shaft (12), which serves as an intermediate transmission shaft. Its two ends are respectively connected to the seed suction plate (1) and the seed guide plate (2).

6. The air-suction interval seeding device according to claim 1, characterized in that, The seed guide groove (20) near the top edge and the adsorption hole (10) near the top edge of the seed suction plate (1) are rotated together, one groove to one hole, or according to the number of seeds sown N at one time, one groove to N holes are matched.

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