A kind of air suction seed metering device suitable for hilly and mountainous bumpy ground seeding

Abstract

The application discloses a kind of air suction seed metering device suitable for hilly and mountainous area bumpy ground seeding, it includes casing and the seed metering disc and seed cleaning device placed in casing;Seed metering disc has circumferential array arrangement of suction hole;Each suction hole is close to the side of seed metering disc circle center and is provided with supporting plate;When suction hole passes seed box part, corresponding supporting plate is located in the top or oblique top of suction hole;When suction hole passes seed cleaning device, corresponding supporting plate is located in the oblique bottom or bottom of suction hole;When suction hole moves between seed cleaning device and seed outlet, supporting plate has the upward supporting force of seed that suction hole adsorbs;When suction hole is located in seed throwing area, corresponding supporting plate is located in the oblique top or top of suction hole.In the application, by setting supporting plate, the seed that suction hole absorbs can be effectively prevented from falling in bumpy ground seeding condition, the seeding reliability of air suction seed metering device is improved, and the missing rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seeding, in particular to a pneumatic seed metering device suitable for bumpy ground seeding in hilly areas. BACKGROUND

[0002] Seed metering device is an important part of seeding machinery, and the reliability and capacity of seed metering directly affect the precision and miss-planting rate of seeding. In order to achieve accurate and reliable seed metering of corn, soybean and other seeds, a pneumatic seed metering device is generally used to achieve the seed metering of corn, soybean and other seeds. For example, the applicant's prior application CN116491275A provides a pneumatic seed metering device for single-seed precision seeding, which includes a seed tray, and the suction holes on the seed tray can suck seeds from a seed box, pass through a seed cleaning device, and finally discharge the seeds in a seed metering area. In the prior art, the patent CN213907440U provides a seed disturbing support boss outside the suction hole of the seed tray, which can play a role in disturbing seeds and promoting seed suction, and can also play a role in supporting seeds within a limited angle. The patent CN107852912A discloses a small-particle precision seed metering device combined with suction and scoop, which sets a scoop on the side of the suction hole to scoop seeds from the seed box for the suction hole to suck, so as to improve the success rate of seed suction. When seeding in hilly areas, the ground is uneven, and the seeding machine will vibrate frequently. Under this working condition, the seeds sucked by the suction hole are easy to fall off due to vibration. The above-mentioned patents only optimize the structure of the seed suction link to improve the success rate of seed suction, and do not fully consider the problem that seeds are easy to fall off, so the final miss-planting rate is still high. SUMMARY

[0003] The present application provides a pneumatic seed metering device suitable for bumpy ground seeding in hilly areas, which can effectively prevent the seeds sucked by the suction hole from falling off and reduce the miss-planting rate.

[0004] Technical scheme: In order to achieve the above-mentioned purpose, the pneumatic seed metering device suitable for bumpy ground seeding in hilly areas of the present application comprises a machine shell, a seed metering disc and a seed cleaning device arranged in the machine shell; the machine shell has a seed box part, a seed metering port and an airflow port; the seed metering disc has circumferentially arranged suction holes, and the suction holes pass through the seed box part, the seed cleaning device and the seed metering port in turn as the seed metering disc rotates;

[0005] Each suction hole is provided with a supporting plate on one side close to the center of the seed metering disc, and a seed guide groove on the side away from the center; the supporting plate is arc-shaped; when the seed guide groove passes through the seed pile in the seed box part, it can lift the seeds in the seed pile and take them away from the seed pile, and then the seeds slide down along the groove bottom and pass through the suction hole, thereby improving the success rate of seed suction.

[0006] When the suction hole passes through the seed tank part, the corresponding tray is located directly above or obliquely above the suction hole, at this time the tray plays a role of disturbing the seed in the seed pile of the seed tank part, and after the corresponding suction hole of the tray is separated from the seed pile of the seed tank part, the tray can prevent the seeds falling from above (derived from the seeds lifted by the seed guide groove above and the seeds falling from the suction hole above) from falling the seeds of the corresponding suction hole of the tray; when the suction hole passes through the seed cleaning device, the corresponding tray is located obliquely below or directly below the suction hole, and the seed cleaning device and the tray are located on the upper and lower sides of the suction hole, so that the seed cleaning device applies a force to the seeds adsorbed by the suction hole, so that the excess seeds adsorbed by the suction hole can be dropped, and the seeds adsorbed by the suction hole can be fine-tuned in position so that the seeds can be against the tray; when the suction hole moves between the seed cleaning device and the seed discharge port, the tray has an upward supporting force on the seeds adsorbed by the suction hole, that is, the tray is located directly below or obliquely below the suction hole, and since the tray is arc-shaped, the supporting force of each part of the tray on the seeds is basically directed to the center of the suction hole, which can achieve a better supporting effect; when the suction hole is located in the seed dropping area, the corresponding tray is located obliquely above or directly above the suction hole, so that the tray will not affect the seed dropping.

[0007] Further, the seed cleaning device comprises a seed cleaning support mounted on the machine shell, and further comprises a seed cleaning brush mounted on the seed cleaning support.

[0008] Further, the seed cleaning brush is fixed on a floating seat, the floating seat can slide relative to the seed cleaning support, and a spring acting on the floating seat is mounted on the seed cleaning support; the floating seat has an outwardly convex force receiving part; the outer edge of the seed disc has an outer side profile acting on the force receiving part; the outer side profile can make the seed cleaning brush away from the center of the seed disc at a position directly opposite the suction hole, and make the seed cleaning brush close to the center of the seed disc at positions on both sides of the suction hole. With the above structure, the seed cleaning brush can effectively remove excess seeds on both sides of the suction hole without mistakenly sweeping the seeds of the suction hole, and the seed cleaning effect is good.

[0009] Further, the outer side surface is provided with a guide surface corresponding to each seed suction hole, the guide surface comprises two first concave portions located on both sides of the position opposite to the seed suction hole and a second concave portion located in the middle of the position opposite to the seed suction hole; the depth of the second concave portion is smaller than that of the first concave portion. In this way, when the seed cleaning brush reaches the side of the seed suction hole, the supporting portion enters the first concave portion, the seed cleaning brush is fed deeper (the maximum feeding depth is the first depth) to perform the seed cleaning operation; when the end of the seed cleaning brush reaches the position opposite to the seed suction hole, the supporting portion enters the second concave portion, the seed cleaning brush is fed shallower (the maximum feeding depth is the second depth, the second depth is smaller than the first feeding depth) to push the seed absorbed by the seed suction hole, so that the seed is abutted to the supporting plate, the seed cleaning brush pushes the seed absorbed by the seed suction hole in a touch-and-leave mode to make the seed slide radially, preventing the seed from being swept off by circumferential friction.

[0010] Further, the seed cleaning support is provided with a plurality of seed cleaning brushes, and each seed cleaning brush is staggered in the circumferential direction of the seed sowing disc. In this way, the seed cleaning effect can be ensured by multiple seed cleaning operations.

[0011] Further, the seed guide groove is a V-shaped groove, and the seed suction hole is located at the root of the seed guide groove. When the seed sowing disc rotates, the root of the seed guide groove faces away from the rotation direction of the seed sowing disc, so that the seed can slide along the seed guide groove to the seed suction hole.

[0012] Further, each seed suction hole and the corresponding supporting plate are formed on the same independent seed suction member, and the seed suction member can be rotated to adjust the angle relative to the body portion of the seed sowing disc. In this way, the orientation of the supporting plate relative to the seed suction hole can be adjusted as needed, so that the posture of the supporting plate can be fine-tuned when the seed sowing disc rotates to different positions, and a better supporting effect can be achieved.

[0013] Beneficial effects: The air suction seed sowing device suitable for bumpy ground seeding in hilly areas has the following beneficial effects:

[0014] (1) By arranging a supporting plate for each seed suction hole, the supporting plate not only prevents the seed absorbed by the seed suction hole from falling off, but also plays different roles in different orientations when the seed suction hole moves to different positions. By arranging the supporting plate, the seed absorbed by the seed suction hole can be effectively prevented from falling off in the bumpy ground seeding condition, the seeding reliability of the air suction seed sowing device is improved, and the miss-seeding rate is reduced.

[0015] (2) The seed cleaning device cooperates with the guide surface of the edge of the seed sowing disc to enable the seed cleaning brush to effectively remove the excess seeds located on both sides of the seed suction hole without mistakenly sweeping off the seeds of the seed suction hole, thereby ensuring the seed cleaning effect and reducing the miss-seeding rate.

[0016] (3) can be adjusted as needed to adjust the orientation of the pallet relative to the seed suction hole, so as to fine-tune the posture of the pallet when the seed plate is rotated to different positions, and achieve better holding effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The appearance of the air suction seed metering device suitable for bumpy ground seeding in hilly areas;

[0018] Figure 2 The internal structure of the air suction seed metering device;

[0019] Figure 3 The internal structure of the air suction seed metering device;

[0020] Figure 4 The Figure 3 enlarged structure diagram of part A;

[0021] Figure 5 The back side perspective structure diagram of the seed cleaning device part;

[0022] Figure 6 The back side perspective structure diagram of the seed cleaning device part;

[0023] Figure 7 The front structure diagram of the seed plate in the preferred embodiment;

[0024] Figure 8 The back structure diagram of the seed plate in the preferred embodiment.

[0025] In the figure: 1 - machine shell; 11 - seed box part; 12 - seed discharge port; 13 - air flow port; 2 - seed plate; 21 - seed suction hole; 22 - pallet; 23 - seed guide groove; 24 - first inner recess; 25 - second inner recess; 2A - seed suction part; 2B - body part; 3 - seed cleaning device; 31 - seed cleaning support; 32 - seed cleaning brush; 33 - floating seat; 33a - force receiving part; 34 - spring; 4 - center gear. DETAILED DESCRIPTION

[0026] The application will be further described below in combination with the drawings.

[0027] As Figure 1 shown, the air suction seed metering device suitable for bumpy ground seeding in hilly areas includes a machine shell 1 and a seed plate 2 and a seed cleaning device 3 placed in the machine shell 1; the machine shell 1 has a seed box part 11, a seed discharge port 12 and an air flow port 13; as Figures 2-3 shown, the seed plate 2 has circumferentially arranged seed suction holes 21, and as the seed plate 2 rotates, the seed suction holes 21 pass through the seed box part 11, the seed cleaning device 3 and the seed discharge port 12 in turn. The air flow into the machine shell 1 through the air flow port 13 can generate suction force in the seed suction holes 21.

[0028] As shown in Figure 4 , each of the seed suction holes 21 is provided with a seed plate 22 on the side close to the center of the seed plate 2 and a seed guide groove 23 on the side away from the center; the seed plate 22 is arc-shaped; when the seed guide groove 23 passes through the seed pile in the seed box part 11, it can lift the seeds in the seed pile and take the seeds away from the seed pile, and then the seeds slide along the groove bottom of the seed guide groove 23 and pass through the seed suction hole 21, thereby improving the seed suction success rate.

[0029] When the seed suction hole 21 passes through the seed box part 11, corresponding to the seed filling area in Figure 2 , the corresponding seed plate 22 is located directly above or obliquely above the seed suction hole 21, at this time the seed plate 22 plays a role of disturbing the seeds in the seed pile of the seed box part 11, and after the corresponding seed suction hole 21 is separated from the seed pile of the seed box part 11, the seed plate 22 can prevent the seeds falling from above (from the seeds lifted by the seed guide groove 23 above and the seeds falling from the seed suction hole 21 above) from falling the seeds of the corresponding seed suction hole 21 of the seed plate 22; when the seed suction hole 21 passes through the seed cleaning device 3, corresponding to the seed cleaning area in Figure 2 , the corresponding seed plate 22 is located obliquely below or directly below the seed suction hole 21, and the seed cleaning device 3 and the seed plate 22 are located on the upper and lower sides of the seed suction hole 21, so that the seed cleaning device 3 exerts a force on the seeds adsorbed by the seed suction hole 21, so that the excess seeds adsorbed by the seed suction hole 21 can fall off, and the seeds adsorbed by the seed suction hole 21 can be fine-tuned in position so that the seeds can be against the seed plate 22; when the seed suction hole 21 moves between the seed cleaning device 3 and the seed discharge port 12, corresponding to the seed carrying area in Figure 2 , the seed plate 22 has an upward supporting force on the seeds adsorbed by the seed suction hole 21, that is, the seed plate 22 is located directly below or obliquely below the seed suction hole 21, and since the seed plate 22 is arc-shaped, the support force of each part of the seed plate 22 on the seeds is basically directed to the center of the seed suction hole 21, which can achieve a better supporting effect; when the seed suction hole 21 is located in the seed dropping area, the corresponding seed plate 22 is located obliquely above or directly above the seed suction hole 21, so that the seed plate 22 does not affect the falling seeds, and the seeds falling in the seed dropping area can all be gathered to the seed discharge port 12 for discharge.

[0030] In the above seed metering device, by providing the seed plate 22 for each seed suction hole 21, the seed plate 22 not only can prevent the seeds adsorbed by the seed suction hole 21 from falling off, but also can play different roles when the seed suction hole 21 moves to different positions, and by providing the seed plate 22, the seeds adsorbed by the seed suction hole 21 can be effectively prevented from falling off in the seeding condition on a bumpy ground, the seeding reliability of the air suction type seed metering device is improved, and the missing seeding rate is reduced.

[0031] The seed cleaning device 3 includes a seed cleaning bracket 31 mounted on the housing 1, and a seed cleaning brush 32 mounted on the seed cleaning bracket 31. Figures 5-6 As shown, the seed cleaning brush 32 is fixed on a floating seat 33, which can slide relative to the seed cleaning bracket 31. A spring 34 acting on the floating seat 33 is installed on the seed cleaning bracket 31. The floating seat 33 has an outwardly protruding load-bearing portion 33a. The outer edge of the seed metering disc 2 has an outer surface acting on the load-bearing portion 33a. This outer surface allows the seed cleaning brush 32 to be positioned away from the center of the seed metering disc 2 at the location directly opposite the seed suction hole 21, and to be positioned close to the center of the seed metering disc 2 at the locations on both sides of the seed suction hole 21. With this structure, the seed cleaning brush 32 can effectively remove excess seeds located on both sides of the seed suction hole 21 without accidentally sweeping seeds from the seed suction hole 21 away, resulting in a good seed cleaning effect.

[0032] Specifically, the outer surface has a guide surface corresponding to each seed suction hole 21. The guide surface includes two first concave portions 24 located on both sides of the opposite position and a second concave portion 25 located in the middle of the opposite position. The depth of the second concave portion 25 is less than that of the first concave portion 24. Thus, when the seed cleaning brush 32 reaches the side of the seed suction hole 21, the bearing part 33a enters the first concave part 24, and the seed cleaning brush 32 makes a deeper feed (the maximum feed depth is the first depth) to perform seed cleaning. When the end of the seed cleaning brush 32 reaches the position directly opposite the seed suction hole 21, the bearing part 33a enters the second concave part 25, and the seed cleaning brush 32 makes a shallower feed (the maximum feed depth is the second depth, which is less than the first feed depth). This can push the seeds adsorbed by the seed suction hole 21 so that the seeds come into contact with the tray 22. The seed cleaning brush 32 pushes the seeds radially to slide away in a way that touches and then leaves, preventing circumferential friction from sweeping the seeds off.

[0033] Preferably, a plurality of seed cleaning brushes 32 are installed on the seed cleaning bracket 31, and the seed cleaning brushes 32 are staggered in the circumferential direction of the seed dispensing tray 2. This allows for multiple seed cleanings, ensuring the effectiveness of the seed cleaning.

[0034] The seed guide groove 23 is a V-shaped groove, and the seed suction hole 21 is located at the root of the seed guide groove 23. When the seed metering disc 2 rotates, the root of the seed guide groove 23 faces away from the rotation direction of the seed metering disc 2, so that the seeds can slide down the seed guide groove 23 into the seed suction hole 21.

[0035] Preferably, such as Figures 7-8As shown, each of the seed suction holes 21 and its corresponding supporting plate 22 are formed on the same independent seed suction piece 2A, which can be adjusted in angle relative to the body part 2B of the seed plate 2. In this way, the orientation of the supporting plate 22 relative to the seed suction hole 21 can be adjusted as needed, so as to fine-tune the posture of the supporting plate 22 when the seed plate 2 is rotated to different positions, and achieve better supporting effect. Specifically, the above-mentioned seed suction piece 2A is formed with a gear part, and the seed plate 2 is further provided with a central gear 4 engaged with all the gear parts, and the central gear 4 can be rotated relative to the seed plate 2 to synchronously adjust the positions of all the supporting plates 22, and after the adjustment is completed, the central gear 4 can be fixed relative to the seed plate 2 to achieve the fixation of all the seed suction pieces 2A.

[0036] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A pneumatic seed metering device suitable for sowing on bumpy ground in hilly and mountainous areas, comprising a housing (1) and a seed metering disc (2) and a seed cleaning device (3) placed inside the housing (1); the housing (1) has a seed box section (11), a seed metering port (12) and an airflow port (13); the seed metering disc (2) has seed suction holes (21) arranged in a circular array; characterized in that: Each of the seed suction holes (21) is provided with a tray (22) on the side closest to the center of the seed metering tray (2), and a seed guide groove (23) is provided on the side away from the center. When the seed suction hole (21) passes through the seed box (11), the corresponding tray (22) is located directly above or diagonally above the seed suction hole (21); when the seed suction hole (21) passes through the seed cleaning device (3), the corresponding tray (22) is located diagonally below or directly below the seed suction hole (21); when the seed suction hole (21) moves between the seed cleaning device (3) and the seed discharge port (12), the tray (22) has an upward supporting force on the seeds adsorbed by the seed suction hole (21); when the seed suction hole (21) is located in the seed feeding area, the corresponding tray (22) is located diagonally above or directly above the seed suction hole (21); The seed cleaning device (3) includes a seed cleaning bracket (31) mounted on the housing (1) and a seed cleaning brush (32) mounted on the seed cleaning bracket (31). The seed cleaning brush (32) is fixed on the floating seat (33), which is slidable relative to the seed cleaning bracket (31), and a spring (34) acting on the floating seat (33) is installed on the seed cleaning bracket (31); the floating seat (33) has an outwardly protruding load-bearing part (33a); the outer edge of the seed metering disc (2) has an outer side profile acting on the load-bearing part (33a); the outer side profile allows the seed cleaning brush (32) to be away from the center of the seed metering disc (2) at the position directly opposite the seed suction hole (21), and to be close to the center of the seed metering disc (2) at the positions on both sides of the seed suction hole (21); The outer surface has a guide surface corresponding to each seed suction hole (21). The guide surface includes two first concave portions (24) located on both sides of the opposite position and a second concave portion (25) located in the middle of the opposite position. The depth of the second concave portion (25) is less than that of the first concave portion (24).

2. The air-suction seed metering device for sowing on bumpy ground in hilly and mountainous areas according to claim 1, characterized in that, The seed cleaning support (31) is equipped with a plurality of seed cleaning brushes (32), and each seed cleaning brush (32) is staggered in the circumferential direction of the seed metering tray (2).

3. The air-suction seed metering device for sowing on bumpy ground in hilly and mountainous areas according to claim 1, characterized in that, The seed guide groove (23) is a V-shaped groove, and the seed suction hole (21) is located at the root of the seed guide groove (23).

Images