CN115119579B - Seed case structure and seed metering dish device for unmanned aerial vehicle - Google Patents
Seed case structure and seed metering dish device for unmanned aerial vehicle Download PDFInfo
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- CN115119579B CN115119579B CN202210910258.XA CN202210910258A CN115119579B CN 115119579 B CN115119579 B CN 115119579B CN 202210910258 A CN202210910258 A CN 202210910258A CN 115119579 B CN115119579 B CN 115119579B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/20—Parts of seeders for conducting and depositing seed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D1/00—Dropping, ejecting, releasing, or receiving articles, liquids, or the like, in flight
- B64D1/16—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Sowing (AREA)
Abstract
The invention discloses a seed box structure and a seed metering disc structure for an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle seed metering; the technical problem that seeds cannot be arranged in rows according to a certain interval for sowing by the existing seeder for the unmanned aerial vehicle is solved. The invention provides a seed metering disc device for an unmanned aerial vehicle, which comprises a seed box structure; the seed sowing device also comprises a seed conveying unit, a seed sowing plate unit and a driving unit; the seed box structure is arranged above the seed metering disc unit and is communicated with the seed metering disc unit through the seed conveying unit, and the seed box structure is used for providing seeds for the seed metering disc unit; the driving unit is used for driving the seed sowing plate unit to rotate; the seed metering disc unit can arrange seeds in rows according to a certain interval for seed metering. The invention realizes regular sowing of the seed metering disc device for the unmanned aerial vehicle, ensures that seeds can have a certain interval and can be aligned.
Description
Technical Field
The invention relates to the technical field of unmanned seed metering discs, in particular to a seed metering disc device for an unmanned aerial vehicle.
Background
At present, the seeds of the aerial platform can only be scattered by a plate, the seeds are scattered irregularly in a certain range, the seeds are imprecise and cannot be arranged in rows at certain intervals, so that the aerial platform is unreasonable for planting commercial crops, the space interval between each plant is required to be ensured for the commercial crops, the competing sunlight and nutrients are reduced, and then the aerial platform is only capable of scattering the seeds on the surface, so that the improvement of the sowing survival rate is not facilitated.
Disclosure of Invention
In view of the above analysis, the invention aims to provide a seed metering disc device for an unmanned aerial vehicle, which is used for solving the technical problem that the existing seed sowing device for the unmanned aerial vehicle cannot sow seeds in rows at certain intervals.
The aim of the invention is mainly realized by the following technical scheme:
in one aspect, the present invention provides a seed case structure comprising a seed case, a power device, and a valve plate;
the seed box comprises a cube section and a rectangular pyramid section, the cube section and the rectangular pyramid section are communicated with each other, and the cube section is arranged above the rectangular pyramid; the outlet of the conical bottom of the rectangular pyramid is provided with a valve plate, and the valve plate is connected with a power device, and the valve plate is driven by the power device to move so as to control the flow and the flow velocity of seeds in the seed box entering the seed metering disc.
On the other hand, the invention also provides a seed metering disc device for the unmanned aerial vehicle, which comprises the seed box structure; the seed metering disc device for the unmanned aerial vehicle further comprises a seed conveying unit, a seed metering disc unit and a driving unit;
the seed box structure is arranged above the seed metering disc unit and is communicated with the seed metering disc unit through the seed conveying unit, and the seed box structure is used for providing seeds for the seed metering disc unit;
the driving unit is used for driving the seed sowing plate unit to rotate;
The seed metering disc unit can arrange seeds in rows according to a certain interval for seed metering.
In one possible design, the seed disk unit includes a seed disk;
the inside of the seed metering disc is provided with a cavity, the seed metering disc comprises a first disc surface, a second disc surface, an outer ring surface and an inner ring surface which are all circular, a first cover plate is arranged at the first disc surface of the seed metering disc, and the second disc surface of the seed metering disc is in an opening shape; seed scoops are arranged on the outer ring surface of the seed metering disc at equal intervals;
the bottom of the seed spoon is provided with a first air hole, and the seed spoon is communicated with the inner annular surface through the corresponding first air hole; the aperture of the seed spoon is larger than the aperture of the corresponding first air hole.
In one possible design, the seed tray unit further comprises a gas distribution tray and a gas distribution shaft;
the air distribution plate is arranged in the cavity of the seed metering plate, and the outer annular surface of the air distribution plate is attached to the inner annular surface of the seed metering plate; the center of the first cover plate of the air distribution plate and the seed metering plate is provided with a center hole, and the air distribution shaft penetrates through the center hole.
In one possible design, the seed disk unit further comprises a negative pressure connector;
the air distribution disc is provided with a negative pressure capturing area and a normal pressure area, and the negative pressure capturing area is communicated with the seed conveying unit through a first air hole and a seed spoon;
one end of the air distribution shaft is an open end, the other end of the air distribution shaft is a closed end, the open end of the air distribution shaft is connected with one end of the negative pressure joint, a plurality of air ventilation grooves are formed in the air distribution shaft, the air ventilation grooves are annularly arranged on the air distribution shaft, and the air distribution shaft is communicated with a negative pressure capturing area of the air distribution disc through the air ventilation grooves;
The other end of the negative pressure joint is connected with a negative pressure machine, and the negative pressure machine pumps air to the negative pressure capturing area through the negative pressure joint and an air vent groove on the air distribution shaft to form negative pressure so that seeds are adsorbed in the seed spoon.
In one possible design, the distribution plate comprises a plate body, a shaft hole step and a second cover plate;
the tray body is nested in the cavity of the seed metering tray, and the outer annular surface of the tray body is attached to the inner annular surface of the seed metering tray; the shaft hole step is arranged at the center of the disc body, a central hole is arranged on the second cover plate, and the central hole is attached to the outer shaft surface of the shaft hole step; the distribution shaft penetrates through the shaft hole step and the central hole on the second cover plate.
In one possible design, the distribution plate further comprises an adjusting baffle, a fixed baffle and a high-pressure gas step;
the adjusting partition plate and the fixed partition plate are arranged on the tray body, a plurality of through grooves and a plurality of non-through grooves are arranged on the shaft hole steps, and the through grooves are corresponding to the positions of the ventilation grooves on the air distribution shaft and are communicated with each other; one end of the adjusting partition board is inserted into the non-through groove, and one end of the fixing partition board is fixed on the shaft hole step; the other end of the fixed partition board is connected with a high-pressure air step, and the outlet end of the high-pressure air step is one end far away from the fixed partition board; the sum of the length of the fixed partition plate and the length of the high-pressure gas step is equal to the length of the adjusting partition plate;
The adjusting partition board is used as the initial boundary of the negative pressure capturing area and the final boundary of the normal pressure area to be inserted into the non-through groove on the shaft hole step, and the high-pressure gas step is connected with the fixed partition board and forms the final boundary of the negative pressure capturing area and the initial boundary of the normal pressure area together; the area surrounded by the second cover plate, the plate body of the air distribution plate and the inner ring surface of the seed metering plate forms a negative pressure capturing area and a normal pressure area.
In one possible design, the distribution plate further comprises a high-pressure gas joint;
the second cover plate is provided with a high-pressure gas joint hole, the high-pressure gas joint penetrates through the high-pressure gas joint hole and is communicated with the high-pressure gas step, and the driving unit can drive the seed metering disc to rotate so that the seed spoon is aligned with the outlet end of the high-pressure gas step.
In one possible design, the seed metering disc device for the unmanned aerial vehicle further comprises a transmitting unit, wherein the transmitting unit comprises a transmitting tube;
the transmitting tube is arranged on the outer ring surface of the seed metering disc, the transmitting tube is communicated with the seed scoop aligned with the outlet end of the high-pressure air step, the high-pressure air connector is connected with the high-pressure air source, the high-pressure air provided by the high-pressure air source enters the seed scoop through the high-pressure air connector and the high-pressure air step, and seeds in the seed scoop are blown into the transmitting tube and are transmitted out.
In one possible design, the seed spoon is a cylindrical cavity, and the seed spoon is internally provided with a sealing ring, and the radii of the seed spoon, the sealing ring and the first air hole are sequentially reduced.
Compared with the prior art, the invention has at least one of the following beneficial effects:
() Seed scoops are uniformly distributed on the outer ring surface of the seed metering disc, the seed scoops are communicated with a negative pressure capturing area through a first air hole, the negative pressure capturing area can continuously provide negative pressure for the seed scoops on the seed metering disc, and under the action of the negative pressure, the seed metering disc captures nearby seeds, namely the seeds in the seed filling section are captured and then are accommodated in the seed scoops. Because the seed metering disc continuously rotates, seeds of the seed filling section can continuously enter the seed spoon. For the captured seeds, when the seed metering disc rotates to a transmitting position (the position where the seed spoon is aligned with the transmitting pipe), high-pressure air provided by the high-pressure air source enters the seed spoon through the high-pressure air connector and the high-pressure air step, and the seeds in the seed spoon are blown into the transmitting pipe and are ejected, so that the seeds are transmitted at a certain interval, and meanwhile, the seeds are planted in rows.
(2) The existing aerial platform can only spread grass seeds, and the grass seeds are thrown out through a plate, irregularly spread in a certain range, inaccurately spread, and can not arrange the seeds in rows at certain intervals, so that the sowing of the grass seeds is unreasonable for planting economic crops. The invention can ensure that each plant of the planted cash crops has reasonable space interval by arranging seeds into rows for planting so as to reduce competing sunlight and nutrients.
(3) The bottom of the seed box is provided with the valve plate, and the flow velocity of seeds in the box body can be controlled by controlling the opening degree of the valve plate.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the embodiments of the invention particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a seed metering device;
FIG. 2 is a schematic view of the structure of a seed plate;
FIG. 3 is a schematic view of the structure of the bearing housing bore and large pulley on the first cover plate;
FIG. 4 is a schematic structural view of a seed spoon;
FIG. 5 is a schematic view of the structure of the body of the distribution plate;
FIG. 6 is a schematic view of a second cover plate of the distribution plate;
FIG. 7 is a schematic view of a valve shaft 1;
FIG. 8 is a schematic view of the structure of the valve shaft 2;
FIG. 9 is a schematic view of the structure of the seed box unit;
FIG. 10 is a schematic view of the structure of the seed charging section and the seed metering disc;
fig. 11 is a schematic structural view of the supporting unit;
FIG. 12 is a schematic side view of a seed plate apparatus;
FIG. 13 is a schematic structural view of the seed filling section;
FIG. 14 is an axial cross-sectional view of the valve shaft 1;
FIG. 15 is an axial cross-sectional view 2 of the valve shaft;
fig. 16 is a schematic view of a launch tube structure.
Reference numerals:
1-seed box; 2-vibrator; 3-a conveying section; 4-a seed filling section; 5-a seed metering disc unit; 6-a transmitting tube; 7-a first accelerating chute; 8-a first U-shaped tube; 9-a vertical straight pipe; 10-a second U-shaped tube; 11-injecting an inclined tube; 12-an outer ring surface of the seed sowing plate; 13-inner ring surface of seed-metering disk; 14, a seed spoon; 15-a first cover plate; 16-bearing housing holes; 17-a large belt wheel; 18-a first air hole; 19-a sealing ring; 20-a tray body; 21-adjusting the partition; 22-a fixed partition; 23-high-pressure gas steps; 24-first support rib; 25-second support ribs; 26-a third support rib; 27-shaft hole steps; 28-a through slot; 29-non-through slots; 30-a high-pressure gas joint; 31-bolts; 32-a first column section; 33-a second column section; 34-a third column section; 35-fourth column section; 36-a fifth column section; 37-first keyway; 38-a first vent slot; 39-shaft shoulders; 40-annular grooves; 41-a barrel section; 42-vertebral segments; 43-a valve plate; 44-leakage holes; 45-a tripod; 46-a launch tube arm; 47-a launch tube clamp; 48-a negative pressure capture zone; 49-normal pressure area; 50-a first disk surface; 51-a second disk face; 52-an arc-shaped cylindrical cavity; 53-arc-shaped opening; 54-seed injection port; 55-seed reflux port; 56-a first flat key; 57-second keyway; 58-second flat key; 59-a second acceleration chute.
Detailed Description
The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.
The present invention provides a seed box structure, as shown in fig. 9 and 12, comprising a seed box 1, a power device and a valve plate 43; the seed box 1 comprises a barrel section and a cone section, such as a cube section 41 and a rectangular pyramid section 42, wherein the cube section 41 is arranged above the rectangular pyramid and is communicated with the rectangular pyramid; the outlet of the conical bottom of the rectangular pyramid is provided with a valve plate 43, the valve plate 43 is connected with a power device, and the power device drives the valve plate 43 to move so as to control the flow of seeds in the seed box 1.
Compared with the prior art, the invention can control the flow rate and the flow velocity when seeds in the box body flow out by controlling the opening degree of the valve plate 43.
In order to prevent the seeds from blocking the valve plate 43 at the bottom of the seed box 1, as shown in fig. 9, the seed box structure of the invention further comprises a vibrator 2, wherein the vibrator 2 is arranged on one conical surface of the rectangular pyramid, and the vibrator 2 (a vibrating motor) can drive the seeds in the seed box 1 to shake together, thereby preventing the seeds from blocking the valve plate 43 and finally ensuring that the seeds can be smoothly discharged.
The invention also provides a seed metering disc device for the unmanned aerial vehicle, which comprises the seed box structure, a seed metering disc unit 5, a driving unit, a seed conveying unit and a transmitting tube unit; the seed box structure is arranged above the seed plate unit 5, and is communicated with the seed plate unit 5 through the seed conveying unit.
The seed conveying unit comprises a conveying section 3 and a seed filling section 4, wherein one end of the conveying section 3 is communicated with the seed box structure, and the other end of the conveying section is communicated with the seed filling section 4; the seed metering disc unit 5 comprises a negative pressure capturing area and a normal pressure area; the seed filling section 4 is covered on the negative pressure capturing area and is communicated with the negative pressure capturing area, and seeds provided by the seed box structure sequentially pass through the conveying section 3 and the seed filling section and are adsorbed in the seed metering disc unit 5 under the adsorption action of the negative pressure capturing area; the transmitting tube unit is arranged below the seed metering disc unit 5 and is positioned on the boundary line of the negative pressure capturing area and the normal pressure area.
The seed metering disc device of the invention also comprises a transmitting tube unit, the transmitting tube unit is communicated with the seed metering disc unit 5, the seed metering disc unit 5 is connected with a driving unit, the driving unit can drive the seed metering disc assembly to rotate, seeds can be captured and arranged when the seed metering disc unit 5 rotates, and the captured and arranged seeds are transmitted out through the transmitting tube 6.
Specifically, as shown in fig. 1 to 12, the seed metering disc device of the present invention is mainly applied to an unmanned aerial vehicle, and the seed metering disc device includes a seed box structure, a seed metering disc unit 5, a driving unit, a seed conveying unit and a transmitting tube unit, wherein the seed box structure is used for storing seeds, the seed box structure and the seed metering disc unit 5 adopt a separated design, and the seed box structure is arranged above the seed metering disc unit 5. The working process of the seed metering disk device for the unmanned aerial vehicle is as follows: seeds in the seed box structure enter the seed filling section through the conveying section 3 of the seed conveying unit, and the seed filling section is covered on the negative pressure capturing area of the seed metering disc unit 5 and is communicated with the negative pressure capturing area, so that the seeds stay in the seed metering disc unit 5 after entering the seed metering disc unit 5 due to the negative pressure adsorption effect, the seeds in the seed filling section 4 continuously enter the seed metering disc unit 5 in the rotation process of the seed metering disc unit 5 driven by the driving unit, and meanwhile, the seeds in the seed metering disc unit 5 are emitted out through the transmitting tube unit and sowed on the ground when passing through the transmitting tube unit.
In the prior art, the seed box 1 and the seed metering disc are designed in a semi-embedded manner, and the seed metering disc unit 5 cannot be replaced according to the size of seeds, so that seeds with a single size can be sown. Compared with the prior art, the seed box structure and the seed plate unit 5 adopt a separated design, and the seed plate unit 5 can be replaced according to the sizes of seeds aiming at seeds with different sizes, so that the applicability of the seed plate device is improved.
It should be noted that, considering that the seed box is large in size, the seed box unit is not arranged together with the conveying unit and the seed metering disc unit, and the seed box unit and the seed metering disc unit are communicated through the seed conveying unit. The seed case is installed in unmanned aerial vehicle and is close to focus position, and the seed metering dish unit is arranged in unmanned aerial vehicle's outside (keep away from unmanned aerial vehicle focus position).
As shown in fig. 1 to 6, in order to capture and arrange seeds at a fixed interval, the seed plate unit 5 of the present invention includes a seed plate; the inside of the seed metering disc is provided with an annular cake-shaped structure of a cavity, the seed metering disc comprises an outer annular surface 12 of the seed metering disc, an inner annular surface 13 of the seed metering disc, a first disc surface 51 and a second disc surface 50 which are oppositely arranged, a first cover plate 15 is arranged at the first disc surface 51 of the seed metering disc, and the second disc surface 50 of the seed metering disc is in an opening state (namely, no cover plate is arranged); seed scoops 14 are arranged on the outer ring surface 12 of the seed metering disc at equal intervals along the circumferential direction of the outer ring surface, the seed scoops 14 are grooves formed along the radial direction of the seed metering disc, first air holes 18 along the radial direction of the seed metering disc are formed in the bottom of the seed scoops 14, and the seed scoops 14 are communicated with the inner ring surface through the corresponding first air holes 18; the aperture of the seed spoon 14 is larger than the aperture of the corresponding first air hole 18, and the holes of the seed spoon 14 are arranged along the radial direction of the seed metering disc.
The seed plate unit also comprises a gas distribution plate, a gas distribution shaft and a negative pressure joint, wherein the gas distribution plate is arranged in an inner cavity of the seed plate (as shown in fig. 2 and 10), and the outer annular surface of the gas distribution plate is attached to the inner annular surface 13 of the seed plate; the center of the first cover plate 15 of the air distribution plate and the seed metering plate is provided with a center hole, and the air distribution shaft penetrates through the center hole.
In order to enable the negative pressure capturing area in the air distribution plate to form negative pressure, the seed metering plate unit of the invention further comprises a negative pressure connector; the air distribution disc is provided with a negative pressure capturing area and a normal pressure area, and the negative pressure capturing area is communicated with the seed conveying unit through a first air hole and a seed spoon; one end of the air distribution shaft is an open end, the other end of the air distribution shaft is a closed end, the open end of the air distribution shaft is connected with the negative pressure joint, a plurality of ventilation grooves are formed in the air distribution shaft, and the air distribution shaft is communicated with a negative pressure capturing area of the air distribution disc through the ventilation grooves; the negative pressure joint is connected with a negative pressure machine, and the negative pressure machine pumps air to the negative pressure capturing area through the negative pressure joint and an air vent groove on the air distribution shaft to form negative pressure so that seeds are adsorbed in the seed spoon 14.
It should be emphasized that the seed plate unit 5 of the present invention is a core component of a seed plate device for an unmanned aerial vehicle, the seed plate is used for capturing seeds, the seed plate unit 5 includes a seed plate, a gas distribution shaft and a negative pressure joint, wherein the shape of the seed plate is a disc shape, a cavity is arranged in the seed plate, the seed plate includes an annular outer ring surface and an annular inner ring surface, the inner ring surface is formed by the cavity, one end surface (i.e. the surface of the seed plate) of the seed plate is in an open state, and a first cover plate 15 is arranged on the other end surface. The seed scoops 14 are arranged on the outer ring surface 12 of the seed metering disc at equal intervals, for example, the number of the seed scoops 14 is 20, the seed scoops 14 are communicated with the seed filling section outwards and are communicated with the negative pressure capturing area inwards through the first air holes 18, when the negative pressure machine is started, the negative pressure machine pumps air to the negative pressure capturing area through the negative pressure connector and the air grooves on the air distribution shaft to form negative pressure, and the negative pressure capturing area is communicated with the seed scoops 14 through the first air holes 18, so that the seed scoops 14 can capture seeds and contain the seeds, and when the seed metering disc rotates, the seeds are prevented from flying out of the seed scoops 14.
In conclusion, the seed metering disc has the functions of ensuring dynamic air tightness, capturing seeds, metering seeds, transmitting and centering. The invention ensures that seeds cannot leak to the outside by dynamically sealing the outer ring surface 12 of the seed metering disc and the seed filling section 4. The inner ring surface 13 of the seed metering disc and the gap of the air distribution disc are dynamically sealed through the contact type sealing ring, so that the establishment of the vacuum degree of a negative pressure capturing area in the air distribution disc is ensured, and enough attractive force is provided for capturing seeds.
In order to fill the gap between the seed spoon 14 and the seeds to a certain extent, reduce the air leakage and improve the air source utilization rate, as shown in fig. 4, the seed spoon 14 is a columnar cavity, a sealing ring 19 is arranged in the seed spoon 14, and the radiuses of the seed spoon 14, the sealing ring 19 and the first air hole 18 are sequentially reduced.
Specifically, as shown in the figure, a sealing ring 19 is arranged in the columnar cavity of the seed spoon 14, the sealing ring 19 is positioned at the bottommost part of the columnar cavity, and the captured seeds in the seed spoon 14 are positioned in the sealing ring 19, so that the radius of the sealing ring 19 is smaller than that of the seed spoon 14, the gap between the seeds and the seed spoon 14 can be reduced, the air leakage is reduced, and the air source utilization rate is improved.
In order to ensure that seeds are captured and contained in a seed spoon 14, as shown in fig. 13, two ends of a seed filling section 4 of the invention are correspondingly provided with a seed injection opening 54 and a seed return opening 55, an arc-shaped cylindrical cavity 52 is arranged between the seed injection opening 54 and the seed return opening 55, an arc-shaped opening 53 is arranged on the inner side of the arc-shaped cylindrical cavity 52, and the radian of the arc-shaped opening 53 is equal to that of the arc-shaped cylindrical cavity 52; the arc-shaped cylindrical cavity 52 of the seed filling section 4 is matched with the shape of the seed metering disc, and the arc-shaped opening 53 of the arc-shaped cylindrical cavity 52 covers the negative pressure capturing area and is communicated with the negative pressure capturing area; seeds provided by the seed box unit enter the seed filling section 4 through the conveying section 3, and then the negative pressure of the negative pressure capturing area is absorbed in a seed spoon of the seed metering disc.
As shown in fig. 10 and 13, the seed filling section 4 of the present invention is configured to ensure that seeds are captured by the structure of the seed metering disc, and since the structure of the seed metering disc is provided with a negative pressure capturing area, the negative pressure capturing area is communicated with the seed filling section 4 through an arc-shaped opening 53, and a dynamic seal is formed between the arc-shaped opening 53 and the negative pressure capturing area. In addition, a plurality of air leakage holes 44 are uniformly distributed on the outer side surface of the arc-shaped cylindrical cavity 52 at equal intervals along the arc length direction, and air is sucked into the negative pressure capturing area through the air leakage holes 44 to push seeds into the seed metering disc structure.
In order to ensure that seeds can be captured, as shown in fig. 5 to 6, the air distribution disc of the present invention comprises a disc body 20, an axial hole step 27, a second cover plate, an adjusting partition plate 21, a fixed partition plate 22, a high-pressure air step 23 and a high-pressure air joint 30; the tray body 20 is nested in the cavity of the seed metering tray, and the outer annular surface of the tray body 20 is attached to the inner annular surface 13 of the seed metering tray (as shown in fig. 2 and 10); the shaft hole step 27 is arranged at the center of the tray body 20, a central hole is arranged on the second cover plate, and the central hole is attached to the outer shaft surface of the shaft hole step 27; the distribution shaft penetrates through the shaft hole step 27 and a central hole on the second cover plate; the shaft hole step 27 is provided with a plurality of through grooves 28 and a plurality of non-through grooves 29, the through grooves 28 correspond to the positions of the ventilation grooves on the gas distribution shaft and are communicated with each other, the adjusting baffle plate 21 and the fixed baffle plate 22 are arranged on the tray body 20, and one end of the adjusting baffle plate 21 is inserted into the non-through grooves 29; one end of the fixed partition 22 is fixed on the shaft hole step 27; the other end of the fixed clapboard 22 is connected with a high-pressure air step 23, and the outlet end of the high-pressure air step 23 is one end far away from the fixed clapboard 22; the sum of the length of the fixed diaphragm 22 and the length of the high-pressure gas step 23 is equal to the length of the adjustment diaphragm 21; the adjusting baffle plate 21 is inserted into the non-through groove 29 on the shaft hole step 27 as the starting boundary of the negative pressure capturing area and the ending boundary of the normal pressure area, the high pressure gas step 23 is connected with the fixed baffle plate 22 and forms the ending boundary of the negative pressure capturing area and the starting boundary of the normal pressure area together (the starting boundary and the ending boundary of the negative pressure capturing area are arranged to prevent the seed spoon 14 of the non-seed filling area on the seed sowing plate from leaking gas); the area surrounded by the second cover plate, the plate body 20 of the air distribution plate and the inner annular surface 13 of the seed metering plate comprises a negative pressure capturing area and a normal pressure area; the second cover plate is provided with a high-pressure gas joint 30 hole, the high-pressure gas joint 30 penetrates through the high-pressure gas joint 30 hole and is communicated with the high-pressure gas step 23, and the driving unit can drive the seed metering disc to rotate so as to align the seed spoon 14 with the outlet end of the high-pressure gas step 23; the transmitting tube 6 is arranged on the outer ring surface 12 of the seed metering disc, the transmitting tube 6 is communicated with the seed spoon 14 aligned with the outlet end of the high-pressure air step 23, the high-pressure air connector 30 is connected with a high-pressure air source, high-pressure air provided by the high-pressure air source enters the seed spoon 14 through the high-pressure air connector 30 and the high-pressure air step 23, and seeds in the seed spoon 14 are blown into the transmitting tube 6 and are transmitted.
Specifically, the air distribution plate is used for providing and distributing air pressure for capturing and blowing out seeds to the seed metering plate, and the specific process for capturing and blowing out the seeds by using the air distribution plate comprises the following steps: the seeds in the seed box 1 enter the seed filling section through the conveying section 3, and meanwhile, the negative pressure is utilized to vacuumize a negative pressure capturing area, specifically, the negative pressure capturing area is vacuumized through a negative pressure joint, a ventilation groove on a gas distribution shaft and a through groove 28 on a shaft hole step 27, after a certain negative pressure is formed in the negative pressure capturing area, the negative pressure capturing area is communicated with the seed spoon 14 through the first gas hole 18, so that air in the seed spoon 14 flows to the negative pressure capturing area, a certain negative pressure adsorption effect is formed in the seed spoon 14, and the seeds are captured and contained in the seed spoon 14; the seed metering disc continues to run, seeds are continuously captured and contained by the seed spoon 14 communicated with the negative pressure capturing area, the captured seeds are transported through the seed metering disc (rotated by a certain angle), and after the seed spoon 14 of the seed metering disc rotates to a transmitting position (which means a position aligned with the transmitting tube 6), high-pressure air provided by the high-pressure air source enters the seed spoon 14 through the high-pressure air connector 30 and the high-pressure air step 23, and the seeds in the seed spoon 14 are blown into the transmitting tube 6 and are transmitted.
Compared with the prior art, the seed spoon 14 is communicated with the negative pressure capturing area, the seeds are captured by utilizing the negative pressure, the seeds are accommodated in the seed spoon 14, and the seeds are emitted out through the emitting tube 6 by utilizing high-pressure air, so that the seeds can be endowed with a certain initial speed, the seeds can be ensured to penetrate deeper soil layers, the seeds are prevented from falling down by gravity, and the penetration depth is low. In addition, the seed sowing precision can be improved by transmitting seeds through the transmitting tube, and the problem of low seed sowing precision of an air seeder for sowing seeds through the seed throwing disc in the prior art is solved.
In order to ensure that seeds are captured and contained in the seed spoon 14, as shown in fig. 10, the seed charging section 4 of the present invention is an arc-shaped semi-open cavity covering the negative pressure capture area on the seed metering disc, and the open side of the seed charging section 4 is dynamically sealed with the outer annulus 12 of the seed metering disc. In addition, the outer side surface of the cavity of the seed filling section 4 is provided with air leakage holes 44 which are arranged at equal intervals, when negative pressure is built in the negative pressure capturing area after air supply in the seed metering disc, most of air enters the cavity of the seed filling section 4 from the air leakage holes 44 on the seed filling section 4 and flows to the negative pressure capturing area through the seed spoon 14 of the seed metering disc, the air flow pushes seeds into the seed spoon 14, and the seeds are sucked by suction force to be fixed in the seed spoon 14 after falling into the seed spoon, so that the seed capturing is completed.
As shown in fig. 11, in order to fix the seed plate device on the unmanned aerial vehicle, the seed plate device for unmanned aerial vehicle of the present invention further includes a supporting unit including a tripod 45, a launching tube support arm 46 and a launching tube clamp 47; the triangular bracket 45 is fixedly connected with the aerial platform, one corner of the triangular bracket 45 is hinged with the air distribution shaft, and the other two corners are fixedly connected with the seed filling section 4; one end of the transmitting tube support arm 46 is hinged with the air distribution shaft, the other end of the transmitting tube support arm is fixedly connected with the transmitting tube 6 mounting clamp, and the transmitting tube clamp 47 is used for mounting the transmitting tube 6; a bearing seat hole 16 and an annular boss-shaped large belt wheel 17 are sequentially arranged outwards along the central hole on the end surface of the first cover plate 15 far away from the negative pressure capturing area; a bearing is arranged between the bearing seat hole 16 and the air distribution shaft; the outer ring surface of the large annular boss-shaped belt wheel 17 is a belt surface; the driving unit comprises an engine, a driving wheel and a belt, wherein the engine is arranged on the tripod 45, the driving wheel is directly arranged on an output shaft of the engine, and the driving wheel and the large belt wheel 17 are driven by the belt to drive the seed sowing plate to rotate.
Specifically, the tripod 45 is fixedly connected with an aerial platform (e.g. an unmanned aerial vehicle), one end of the tripod 45 is hinged with a gas distribution shaft, the other two ends of the tripod are respectively fixedly connected with the upper end and the lower end of the arc seed filling section 4, the transmitting tube support arm 46 is in a cuboid plate shape, one end of the transmitting tube support arm 46 is in a semicircle shape, the other end of the transmitting tube support arm is in a cuboid shape, a central through hole is formed in the semicircle end, the gas distribution shaft penetrates through the central through hole, a fastening nut is arranged on the outer side of the semicircle end, and the fastening nut is in threaded connection with the gas distribution shaft and used for fastening one end of the tripod 45 and the semicircle end of the transmitting tube support arm 46 on the gas distribution shaft. Two threaded holes are formed in the rectangular end of the emitter tube support arm 46, bolts 31 are respectively disposed in the threaded holes, and the emitter tube clamp 47 is fixedly connected with the emitter tube support arm 46 through the bolts 31.
The transmitting tube unit of the present invention includes a transmitting tube 6; as shown in fig. 16, the transmitting tube 6 is fixed at one end of the transmitting tube clamp 47, the other end of the transmitting tube clamp 47 is fixedly connected with one end of the transmitting tube support arm 46, and the other end of the transmitting tube support arm 46 is fixedly connected with the tripod 45; the transmitting pipe 6 is arranged below the seed metering disc device for the unmanned aerial vehicle and corresponds to the seed ejection port; the transmitting tube 6 is provided with a first accelerating inclined tube 7; the first accelerating inclined tube 7 is communicated with a first-stage high-pressure air source arranged on the unmanned aerial vehicle.
The launch tube structure of the present invention is used for the launching of nut-type seeds and/or for the launching of seed capsules for commercial crop seeds. The nut seeds include nut with hard shell, chestnut, water chestnut, gingko, apricot, pistachio, melon seed and acorn. In addition, some commercial crop seeds which do not have a hard outer shell and are irregularly shaped can be launched through capsule encapsulation, i.e., some nutrients such as fertilizers encapsulate the seeds to form a spherical package, forming a seed capsule.
It should be noted that, whether it is nut seeds or seed capsules, a high speed is required to make the seeds penetrate the ground surface during the launching, and since the seeds have a hard shell or capsule protection, the internal structure of the seeds will not be affected when they penetrate the soil, i.e. the germination rate of the seeds will not be affected.
In order to increase the seed emission speed, as shown in fig. 16, a second accelerating inclined tube 59 is arranged below the first accelerating inclined tube 7, and the second accelerating inclined tube 59 is communicated with a secondary high-pressure air source arranged on the unmanned aerial vehicle; the axial included angle between the second accelerating inclined tube 59 and the transmitting tube 6 is smaller than the axial included angle between the first accelerating inclined tube 7 and the transmitting tube 6; the pressure of the high-pressure gas of the secondary high-pressure gas source is greater than that of the high-pressure gas of the primary high-pressure gas source.
Compared with the prior art, the seed-dressing device has the advantages that the first accelerating inclined tube 7 and the second accelerating inclined tube 59 are arranged, so that the seeds can be ensured to have higher emitting speed, and the seeds can be ensured to penetrate through the soil surface layer.
The radius of the large pulley 17 is larger than the radius of the bearing housing hole 16, the radius of the bearing housing hole 16 is larger than the radius of the hollow hole, and the valve shaft penetrates the bearing housing hole 16 and the large pulley 17 in the shape of an annular boss. The inner cylindrical surface of the bearing seat hole 16 is a positioning surface matched with a bearing, a shaft shoulder 39 is arranged at one end close to the closed end of the valve shaft seal, the shaft shoulder 39 is used for limiting the movement of the bearing in the axial direction of the valve shaft, an annular groove 40 is arranged at one end close to the open end of the valve shaft, and a retainer ring is arranged in the annular groove 40 and is also used for limiting the movement of the bearing in the axial direction of the valve shaft. The outer cylindrical surface of the large annular boss-shaped belt wheel 17 is a working surface matched with the conveyor belt.
It should be noted that, as shown in fig. 7 and 8, the valve shaft of the present invention is a mounting base of the valve disc, and has functions of fastening, centering and valve. The air distribution shaft is hollow and columnar, and comprises a first column section 32, a second column section 33, a third column section 34, a fourth column section 35 and a fifth column section 36 from the closed end to the open end in sequence; wherein, the first column section 32 is provided with external threads for installing a valve disc nut to fix the valve disc; the second column section 33 is used for installing and positioning the air distribution disc, the plurality of air channels comprise a first air channel 38, a second air channel and a third air channel, the three air channels are all arranged on the second column section 33, the plurality of through channels 28 on the shaft hole step 27 of the air distribution disc comprise a first through channel, a second through channel and a third through channel, the first through channel corresponds to the first air channel 38 in position and is communicated with the first through channel, the second through channel corresponds to the second air channel in position and is communicated with the second through channel in position, the third through channel corresponds to the third air channel in position and is communicated with the third air channel in position, and the three through channels 28 and the three air channels are arranged for vacuumizing the negative pressure capturing area by utilizing the air distribution shaft. The third column section 34 is used for installing a bearing, and a shaft shoulder 39 is arranged between the second column section 33 and the third column section 34, and the shaft shoulder 39 is an axial positioning end face of the air distribution disc and is used for limiting the axial position of the bearing. An annular groove 40 is provided between the third and fourth five column sections 34, the annular groove 40 being used to mount a shaft collar which is used to limit bearing movement. The fourth column section 35 is used for installing a tripod 45 and a transmitting tube support arm 46, wherein the tripod 45 is installed at one end close to the shaft shoulder 39, and the transmitting tube support arm 46 is installed at one end far away from the shaft shoulder 39. The fifth column section 36 is provided with an internal thread for mounting a negative pressure fitting.
The blind end and the open end of the gas distribution shaft are provided with external threads, the external threads are provided with fastening nuts, the fastening nuts of the blind end are matched with the external threads of the gas distribution shaft to fasten the second cover plate, the second cover plate is prevented from falling off the gas distribution shaft, and the fastening nuts of the open end are matched with the external threads of the gas distribution shaft to fasten the emitter support arm 46, so that relative sliding between the emitter support arm 46 and the gas distribution shaft is prevented.
It should be noted that, as shown in fig. 7, 8, 14 and 15, the fourth column section 35 is provided with a first key slot 37 and a first flat key 56, and the emitter support arm 46 is provided with a corresponding groove, and the first key slot 37 and the groove are used for accommodating the first flat key 56, so that the first flat key 56 can clamp the emitter support arm 46 and the gas distribution shaft, and when the emitter support arm 46 rotates, the emitter support arm 46 rotates synchronously.
In addition, the second cylindrical section 33 is provided with a second key groove 57 and a second flat key 58, and a groove is also provided on the inner wall of the central hole of the shaft hole step 27 of the gas distribution shaft, the second key groove 57 and the cover groove are used for accommodating the second flat key 58, so that the second flat key 58 can clamp the gas distribution disc and the gas distribution shaft, and when the gas distribution shaft rotates due to the driving of the transmitting pipe support arm 46, the gas distribution shaft and the gas distribution disc can synchronously rotate.
The angle adjustment process of the transmitting tube is as follows: when the transmitting tube support arm 46 is rotated, namely, the transmitting angle of the transmitting tube is adjusted, the fastening nut at the negative pressure joint is unscrewed, the transmitting tube support arm 46 is rotated, at this time, the gas distribution shaft clamped with the transmitting tube support arm 46 through the first key groove 37 and the first flat key 56 synchronously rotates with the transmitting tube support arm 46, the gas distribution shaft rotates to drive the gas distribution disc to rotate, the rotating angle of the gas distribution disc is the same as that of the transmitting tube support arm 46, and after the angle of the transmitting tube is adjusted, the nut at the negative pressure joint is screwed, at this time, the transmitting angle of the transmitting tube 6 is fixed, and the relative angle of the transmitting tube support arm 46 and the gas distribution disc is ensured. At this time, in order to ensure the tightness in the negative pressure capturing area, the adjusting partition plate is inserted into the corresponding non-through groove, so that the negative pressure range of the negative pressure capturing area is adjusted to correspond to the structure of the seed filling section 4. The blind end and the open end of the gas distribution shaft are provided with external threads, the external threads are provided with fastening nuts, the fastening nuts of the blind end are matched with the external threads of the gas distribution shaft to fasten the second cover plate, the second cover plate is prevented from falling off the gas distribution shaft, and the fastening nuts of the open end are matched with the external threads of the gas distribution shaft to fasten the emitter support arm 46, so that relative sliding between the emitter support arm 46 and the gas distribution shaft is prevented.
The fastening nut, the second cover plate, the shaft hole step 27, the air distribution disc body 20, the first cover plate 15, the bearing seat hole 16, the tripod 45, the transmitting tube support arm 46 and the negative pressure connector are sequentially installed on the air distribution shaft from the closed end to the open end.
When the existing seed metering disc device is used for metering seeds, the emitting angle of the seeds cannot be adjusted. Compared with the prior art, the invention can realize the adjustment of the seed emission angle, and the specific process is as follows: when the emission angle of the emission tube 6 needs to be adjusted, the emission tube support arm 46 rotates around the gas distribution shaft by a certain angle, then the emission tube support arm 46 is fastened by a fastening nut, and when the emission tube support arm 46 rotates, the emission tube support arm 46 drives the emission tube clamp 47 to rotate by a certain angle, and finally the emission angle adjustment of the emission tube 6 is realized. In addition, it should be noted that when the angle of the emitter tube 6 is adjusted, the plugging position of the adjusting partition 21 needs to be readjusted to avoid the air leakage in the normal pressure region (i.e. the non-seed filling region) and the non-negative pressure in the negative pressure capturing region.
As shown in fig. 1, in order to return the seed not captured into the seed box 1, the seed transport unit of the present invention further comprises a return section and an injection chute 11; the middle part of the reflux section is a vertical straight pipe 9, two ends of the reflux section are respectively provided with a first U-shaped pipe 8 and a second U-shaped pipe 10, the first U-shaped pipe 8 is communicated with the tail end of the seed filling section 4, and the outlet end of the second U-shaped pipe 10 extends to the upper part of the seed box structure; the injection inclined tube 11 is arranged on the second U-shaped tube 10, and an air inlet of the injection inclined tube 11 is connected with a high-pressure air source; through leading in high pressure high-speed air current to the injection inclined tube 11, the seed that can not be caught by the seed metering dish in the section 4 of filling can flow back to the seed case structure through first U type pipe 8, vertical straight tube 9 and second U type pipe 10 in proper order.
Specifically, the invention uses the high-pressure high-speed air flow injection principle to reflux seeds which are not captured by a seed metering disc into the seed box 1, and the specific process is as follows: after introducing high-pressure high-speed air current into the injection inclined tube 11, the high-pressure high-speed air current (compressed air) can flow out after passing through the second U-shaped tube 10 along the current direction, air in the vertical straight tube 9 and the first U-shaped tube 8 below can flow out along with the high-pressure high-speed air current of top under the influence of injection effect, at this moment, the vertical straight tube 9 and the first U-shaped tube 8 are in a negative pressure state, external air can flow into the seed filling section 4 from the air leakage holes 44 which are arranged on the outer side surface of the cavity of the seed filling section 4 at equal intervals, then reaches the vertical straight tube 9 through the first U-shaped tube 8, is sprayed out together when passing through the injection inclined tube 11, and flows back into the seed box 1.
In order to install the second cover plate and prevent the second cover plate and the tray body 20 from deforming under the action of negative pressure, the air distribution tray further comprises a plurality of supporting rib plates and a plurality of bolts 31, threaded holes are formed in two ends of the supporting rib plates, and the number of the bolts 31 is the same as that of the threaded holes; the disk body 20 of the air distribution disk and the second cover plate are also provided with threaded holes which are the same as the threaded holes on the supporting rib plates in number and correspond to the positions; the bolts 31 respectively penetrate through corresponding threaded holes in the second cover plate, the supporting rib plates and the disc body 20 of the air distribution disc, and the supporting rib plates are used for supporting and installing the second cover plate.
Specifically, as shown in fig. 5 and 6, a plurality of support ribs including a first support rib 24, a second support rib 25 and a third support rib 26 are provided on the gas distribution plate of the present invention, and the first support rib 24 to the third support rib 26 are uniformly arranged in the circumferential direction of the plate body 20 of the gas distribution plate, that is, the first support rib 24 to the third support rib 26 have an angle of 60 ° with each other. The first support rib 24 and the second support rib 25 are located in the negative pressure trapping region, and the third support rib 26 is located in the normal pressure region. In order to avoid that the first support rib 24 and the second support rib 25 block the flow of air in the negative pressure trapping region, therefore, the lengths of the first support rib 24 to the third support rib 26 are controlled to be smaller than the length of the adjustment diaphragm 21.
It should be noted that, the two ends of the first supporting rib plate 24 to the third supporting rib plate 26 are all provided with threaded holes, and 6 threaded holes are formed in the tray body 20 and the second cover plate of the air distribution tray, and 6 bolts 31 sequentially penetrate through the threaded holes in the second cover plate, each supporting rib plate and the tray body 20 of the air distribution tray, so that the second cover plate covers the tray body 20 of the air distribution tray, and when the negative pressure capturing area is pumped, the first supporting rib plate 24 to the third supporting rib plate 26 can support the second cover plate and the tray body 20 of the air distribution tray, so that deformation and collapse of the second cover plate and the tray body 20 of the air distribution tray due to the negative pressure in the negative pressure capturing area are avoided.
In summary, the seed metering disc device of the invention has the following working procedures: the valve plate 43 is driven to move by the power device to open the valve plate 43, seeds fall into the seed filling section 4 through the conveying section 3 after valve opening, the arc-shaped semi-open cavity is communicated with the seed spoon 14 due to the fact that the seed filling section 4 is an arc-shaped semi-open cavity, the seed spoon 14 is communicated with the negative pressure capturing area through the first air hole 18, the negative pressure capturing area can continuously provide negative pressure for the seed spoon 14 on the seed metering disc, and under the action of the negative pressure, the seed disc captures nearby seeds, namely, the seeds in the seed filling section 4 are accommodated in the seed spoon 14 after being captured. As the seed metering disc is continuously rotated, seeds of the seed filling section 4 continuously enter the seed spoon 14. If seeds can not fall into the seed spoon 14, the seeds can enter the first U-shaped pipe 8 of the reflux section, as the injection inclined pipe 11 is arranged on the second U-shaped pipe 10, the air inlet of the injection inclined pipe 11 is connected with a high-pressure air source, when high-pressure high-speed air flow is introduced into the injection inclined pipe 11, the seeds which can not be captured by the seed metering disc in the seed filling section 4 can flow back into the seed box structure through the first U-shaped pipe 8, the vertical straight pipe 9 and the second U-shaped pipe 10 in sequence. For the captured seeds, when the seed metering disc rotates to the emission position (the position where the seed ladle 14 is aligned with the emission pipe 6), high-pressure air provided by the high-pressure air source enters the seed ladle 14 through the high-pressure air connector 30 and the high-pressure air step 23, and the seeds in the seed ladle 14 are blown into the emission pipe 6 and are emitted.
Compared with the prior art, (1) the seed box structure and the seed metering disc unit 5 adopt a separated design, and the seed metering disc unit 5 can be replaced according to the sizes of seeds aiming at seeds with different sizes, so that the applicability of the seed metering disc device is improved; in the prior art, the seed box 1 and the seed metering disc are designed in a semi-embedded manner, and the seed metering disc unit 5 cannot be replaced according to the size of seeds, so that seeds with a single size can be sown. (2) The invention can adjust the angle of the emitting tube 6 by using the emitting tube support arm 46, thereby adjusting the emitting angle of the seeds. The emitting tube 6 of the existing seed metering disc device is vertical to the bottom surface, and the emitting angle of seeds cannot be adjusted. (3) According to the invention, the first accelerating inclined tube 7 is arranged on the transmitting tube 6, so that the seeds can be secondarily accelerated, and the seeds can penetrate deeper soil layers. The seed metering disc device in the prior art mostly adopts gravity seed dropping, and the seed penetration depth is lower.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The seed metering disc device for the unmanned aerial vehicle is characterized by comprising a seed box structure, a seed conveying unit, a seed metering disc unit and a driving unit;
the seed box structure is arranged above the seed metering disc unit and is communicated with the seed metering disc unit through the seed conveying unit, and the seed box structure is used for providing seeds for the seed metering disc unit;
the driving unit is used for driving the seed metering disc unit to rotate;
the seed metering disc unit can arrange seeds in rows at certain intervals for seed metering;
the seed plate unit comprises a seed plate;
the inside of the seed metering disc is provided with a cavity, the seed metering disc comprises a first disc surface, a second disc surface, an outer annular surface and an inner annular surface which are all annular, a first cover plate is arranged at the first disc surface of the seed metering disc, and the second disc surface of the seed metering disc is in an opening shape; seed scoops are arranged on the outer ring surface of the seed metering disc at equal intervals;
the bottom of the seed spoon is provided with a first air hole, and the seed spoon is communicated with the inner annular surface through the corresponding first air hole; the aperture of the seed spoon is larger than the aperture of the corresponding first air hole;
the seed metering disc unit also comprises a gas distribution disc and a gas distribution shaft;
the air distribution plate is arranged in the cavity of the seed metering plate, and the outer annular surface of the air distribution plate is attached to the inner annular surface of the seed metering plate; the center of the first cover plate of the seed metering disc and the center of the air distribution disc are respectively provided with a center hole, and the air distribution shaft penetrates through the center holes;
The seed metering disc unit also comprises a negative pressure joint;
the air distribution disc is provided with a negative pressure capturing area and a normal pressure area, and the negative pressure capturing area is communicated with the seed conveying unit through a first air hole and a seed spoon;
one end of the air distribution shaft is an open end, the other end of the air distribution shaft is a closed end, the open end of the air distribution shaft is connected with one end of the negative pressure joint, a plurality of air ventilation grooves are formed in the air distribution shaft, the air ventilation grooves are annularly arranged on the air distribution shaft, and the air distribution shaft is communicated with a negative pressure capturing area of the air distribution disc through the air ventilation grooves;
the other end of the negative pressure joint is connected with a negative pressure machine, and the negative pressure machine pumps air to the negative pressure capturing area through the negative pressure joint and an air channel on the air distribution shaft to form negative pressure so that seeds are adsorbed in the seed spoon;
the air distribution disc comprises a disc body, a shaft hole step and a second cover plate;
the tray body is nested in the cavity of the seed metering tray, and the outer annular surface of the tray body is attached to the inner annular surface of the seed metering tray; the shaft hole step is arranged at the center of the disc body, a central hole is formed in the second cover plate, and the central hole is attached to the outer shaft surface of the shaft hole step; the air distribution shaft penetrates through the shaft hole step and a central hole on the second cover plate;
The air distribution disc further comprises an adjusting partition plate, a fixed partition plate and a high-pressure air step;
the adjusting partition plate and the fixed partition plate are arranged on the tray body, a plurality of through grooves and a plurality of non-through grooves are formed in the shaft hole step, and the through grooves are corresponding to the positions of the ventilation grooves on the air distribution shaft and are communicated with each other; one end of the adjusting partition board is inserted into the non-through groove, and one end of the fixing partition board is fixed on the shaft hole step; the other end of the fixed partition plate is connected with the high-pressure air step, and the outlet end of the high-pressure air step is one end far away from the fixed partition plate; the sum of the length of the fixed partition plate and the length of the high-pressure gas step is equal to the length of the adjusting partition plate;
the adjusting partition plate is used as the initial boundary of the negative pressure capturing area and the final boundary of the normal pressure area to be inserted into the non-through groove on the shaft hole step, and the high-pressure gas step is connected with the fixed partition plate and jointly forms the final boundary of the negative pressure capturing area and the initial boundary of the normal pressure area; the area surrounded by the second cover plate, the plate body of the air distribution plate and the inner ring surface of the seed metering plate forms the negative pressure capturing area and the normal pressure area.
2. The unmanned aerial vehicle seed metering disc device of claim 1, wherein the gas distribution disc further comprises a high pressure gas connector;
the second cover plate is provided with a high-pressure gas joint hole, the high-pressure gas joint penetrates through the high-pressure gas joint hole and is communicated with the high-pressure gas step, and the driving unit can drive the seed metering disc to rotate so that the seed spoon is aligned with the outlet end of the high-pressure gas step.
3. The seed metering disc device for an unmanned aerial vehicle of claim 2, further comprising a launching unit comprising a launching tube;
the seed metering dish is located to the transmitting tube on the outer anchor ring, just the transmitting tube with the seed spoon that the high-pressure gas step exit end aligns communicates, the high-pressure gas joint is connected with the high-pressure gas source, the high-pressure gas that the high-pressure gas source provided is through high-pressure gas joint and high-pressure gas step entering seed spoon, blows in the seed spoon transmitting tube and launches.
4. The unmanned aerial vehicle seed metering disc device of claim 1, wherein the seed box structure comprises a seed box, a power device and a valve plate;
the seed box comprises a barrel section and a cone section which are communicated with each other, and the barrel section is arranged above the cone section; the outlet of the cone bottom of the cone section is provided with a valve plate, the valve plate is connected with a power device, and the power device drives the valve plate to move so as to control the flow and the flow velocity of seeds in the seed box entering the seed metering disc.
5. The seed metering disc device for an unmanned aerial vehicle of claim 4, wherein the seed box structure further comprises a vibrator, the vibrator is arranged on one conical surface of the cone, and the vibrator can drive seeds in the seed box to shake together.
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| CN202210910258.XA CN115119579B (en) | 2022-07-29 | 2022-07-29 | Seed case structure and seed metering dish device for unmanned aerial vehicle |
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| CN202210910258.XA CN115119579B (en) | 2022-07-29 | 2022-07-29 | Seed case structure and seed metering dish device for unmanned aerial vehicle |
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| AU2003904353A0 (en) * | 2003-08-05 | 2003-08-28 | Holly, John | Seed distribution method and apparatus |
| US9277688B2 (en) * | 2012-10-23 | 2016-03-08 | Kinze Manufacturing, Inc. | Air seed meter with adjustable singulator |
| CN204069714U (en) * | 2014-09-17 | 2015-01-07 | 北京市农业机械研究所 | Become vapour-pressure type accurate nest eye seeds discharging box |
| CN206835612U (en) * | 2017-06-27 | 2018-01-05 | 中国农业大学 | One Room duplicate rows pneumatic seeder |
| CN112136428B (en) * | 2020-09-25 | 2022-06-17 | 湖南有色金属职业技术学院 | Backpack seeding device |
| CN112219502B (en) * | 2020-09-25 | 2021-11-05 | 湖南有色金属职业技术学院 | Seeding machine |
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2022
- 2022-07-29 CN CN202210910258.XA patent/CN115119579B/en active Active
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