阅读说明：本技术 一种非接触式物资投放无人机 (Non-contact material throwing unmanned aerial vehicle ) 是由 李洁 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种非接触式物资投放无人机,包括无人机本体,无人机本体底部可拆卸安装有一壳体,壳体内由上至下依次设有上层动力腔、中层储物腔和下层投放腔,壳体中心处竖向设有圆筒型的主轴腔,主轴腔内转动安装有下层转轴,下层转轴上安装有扭簧,下层转轴上端通过电磁离合器连接有上层转轴,上层转轴安装有第一齿轮；还包括驱动第一齿轮转动、伸缩套伸缩的动力机构以及用于启闭下落口的控料机构。本发明通过采用横向弹射的方式,可以将物品投射到高层建筑中层房间、悬崖平台等特殊地理位置的应用场景时；中层容纳腔内可携带四个物资包,可逐一对物资包进行投放,可实现对多个不同场景位置的抛投,提高物资投放的灵活性。(The invention discloses a non-contact material throwing-in unmanned aerial vehicle, which comprises an unmanned aerial vehicle body, wherein a shell is detachably mounted at the bottom of the unmanned aerial vehicle body, an upper power cavity, a middle storage cavity and a lower throwing-in cavity are sequentially arranged in the shell from top to bottom, a cylindrical main shaft cavity is vertically arranged at the center of the shell, a lower rotating shaft is rotatably mounted in the main shaft cavity, a torsion spring is mounted on the lower rotating shaft, the upper end of the lower rotating shaft is connected with an upper rotating shaft through an electromagnetic clutch, and a first gear is mounted on the upper rotating shaft; the material control device further comprises a power mechanism for driving the first gear to rotate and the telescopic sleeve to stretch and retract and a material control mechanism for opening and closing the falling opening. By adopting a transverse ejection mode, the invention can project articles to application scenes of special geographic positions such as middle rooms of high-rise buildings, cliff platforms and the like; the middle level holds four goods and materials packages of intracavity portability, can throw in the goods and materials package one by one, can realize throwing to a plurality of different scene positions, improves the flexibility that the goods and materials were thrown in.)

1. The utility model provides a non-contact material puts in unmanned aerial vehicle, includes unmanned aerial vehicle body (1), its characterized in that, demountable installation has a casing (2) bottom unmanned aerial vehicle body (1), be equipped with upper power chamber (21), middle level storing chamber (22) and lower floor from top to bottom in casing (2) in proper order and put in chamber (23), open middle level storing chamber (22) bottom has and puts in whereabouts mouth (24) that chamber (23) communicate with the lower floor, the lower floor is put in and is transversely equipped with in chamber (23) and puts in passageway (231), flexible cover (3) are installed in the exit of putting in passageway (231), the vertical main shaft chamber (25) that is equipped with the drum type of casing (2) center department, lower floor pivot (401) are installed to the main shaft chamber (25) internal rotation, install on lower floor pivot (401) and be used for producing torsional spring (404) of resistance to its, the lower layer driving rod (402) extending into the lower layer throwing cavity (23) is mounted on the lower layer rotating shaft (401), a lower layer shifting plate (405) is mounted on the lower layer driving rod (402), the upper end of the lower layer rotating shaft (401) is connected with an upper layer rotating shaft (407) through an electromagnetic clutch (406), four upper layer driving rods (408) extending into the middle layer storage cavity (22) are mounted on the upper layer rotating shaft (407), the four upper layer driving rods (408) are circumferentially distributed along the axis of the upper layer rotating shaft (407), an upper layer shifting plate (409) used for shifting a material package (403) to be thrown in the middle layer storage cavity (22) and enabling the material package to pass through the falling port (24) is mounted on the upper layer driving rod (408), and the top end of the upper layer rotating shaft (407) is rotatably mounted in the upper layer power cavity (21) and is provided with a first gear (410); further comprising:

the power mechanism (5) is arranged in the upper power cavity (21), and the power mechanism (5) drives the first gear (410) to rotate and the telescopic sleeve (3) to stretch;

the material control mechanism (6) is arranged at the top of the lower layer throwing cavity (23) and used for opening and closing the falling opening (24), and the lower layer shifting plate (405) is matched with the material control mechanism (6) to drive the same to open the falling opening (24).

2. The non-contact material delivery unmanned aerial vehicle of claim 1, wherein the power mechanism (5) comprises a driven shaft (501) rotatably mounted in the upper power cavity (21), a second gear (502) mounted on the driven shaft (501) and engaged with the first gear (410), an electric push rod (503) fixedly mounted in the upper power cavity (21), a chute guide rail (504) fixedly mounted in the upper power cavity (21), a sliding plate (505) slidably mounted in the chute guide rail (504), a connecting plate (506) connected with a telescopic end of the electric push rod (503) and the sliding plate (505), a rack (507) located on one side of the sliding plate (505) and engaged with the second gear (502), a spring guide rod (508) with two ends respectively fixedly mounted on the rack (507) and the sliding plate (505), and an electromagnetic guide rod (508) fixedly mounted on the sliding plate (505) and used for adsorbing the rack (507) to separate the rack (507) from the second gear (502) Iron (509); one end of the sliding plate (505) extends out of the upper power cavity (21) and is provided with a connecting rod (510), and the connecting rod (510) is connected with one end, far away from the falling opening (24), of the telescopic sleeve (3).

3. The non-contact material delivery unmanned aerial vehicle of claim 2, wherein the material control mechanism (6) comprises a winding mechanism (61) fixed at the rear part of the drop opening (24), a flexible belt (601) with one end fixed and wound on the winding mechanism (61) and used for closing the drop opening (24) for passing a material packet (403) to be delivered, a traverse plate (602) fixed at the other end of the flexible belt (601), a dovetail chute rail (603) fixed at the left side of the drop opening (24), a dovetail slider (604) slidably arranged in the dovetail chute rail (603) and fixedly connected with the traverse plate (602), a first stay wire winding box (605) fixed at the front part of the drop opening (24) and connected with the dovetail slider (604), a dovetail groove (606) formed in the traverse plate (602), and a strip-shaped dovetail block (607) and a dovetail block (606) slidably arranged in the dovetail groove (606), A limiting block (608) fixed at the right end of the bar-shaped dovetail block (607), and a second stay wire coiling box (609) fixedly installed at the left side of the traverse plate (602) and connected with the bar-shaped dovetail block (607) through stay wires; wherein the flexible band (601) is always kept in a tensioned state.

4. A non-contact material delivery unmanned aerial vehicle according to claim 3, wherein the winding mechanism (61) comprises two vortex spring seats (611) fixed in the lower layer delivery cavity (23), a winding roller (612) rotatably installed in the vortex spring seats (611), and a vortex spring (613) installed in the vortex spring seats (611) and connected with the winding roller (612).

5. The non-contact material delivery unmanned aerial vehicle of claim 4, wherein the power mechanism (5) drives the first gear (410) to rotate in a direction of force accumulation of the torsion spring (404), and the edge of the inner side wall of the falling opening (24) is an upward slope along the direction of force accumulation of the torsion spring (404).

6. The non-contact material delivery unmanned aerial vehicle of claim 5, wherein a rectangular plane coordinate system is established by taking one point along the axis of the upper rotating shaft (407) as a center, the delivery channel (231) is located in a first quadrant (71), the drop opening (24) is located in a second quadrant (72), and the lower dial plate (405) sequentially passes through a fourth quadrant (74), a third quadrant (73) and the second quadrant (72) along the force accumulation direction of the torsion spring (404).

7. The unmanned aerial vehicle is puted in to non-contact material of claim 6, characterized in that, install on casing (2) and store up door (8) with middle level storing chamber (22) corresponds, store up door (8) one end and casing (2) articulated other end and casing (2) separable connection.

8. The unmanned aerial vehicle for contactless material delivery of claim 7, wherein the middle storage chamber (22) and the main shaft chamber (25) form an annular channel for the material bag (403) to be delivered to pass through.

9. The non-contact material delivery unmanned aerial vehicle of claim 8, wherein the lower portion of the lower delivery cavity (23) and the main shaft cavity (25) form an arc-shaped channel for a material bag (403) to be delivered to pass through, and the delivery channel (231) is tangent to the arc-shaped channel.

Technical Field

The invention relates to the field of unmanned aerial vehicles, in particular to a non-contact type material throwing unmanned aerial vehicle.

Background

With the rapid development of the unmanned aerial vehicle technology and the maturity of the market, the unmanned aerial vehicle is widely applied in society, and the unmanned aerial vehicle is well developed in the aspects of fire protection, public safety, material transportation and the like. When a material bag is conveyed, the material bag is arranged at the bottom of an unmanned aerial vehicle in a hanging mode, the conventional unmanned aerial vehicles carry out a throwing and hanging task, a steering engine is mostly used for driving a hook to throw at a fixed point, the material bag is thrown and conveyed in a free falling mode by means of gravity, but the throwing tasks are various at present, scenes are different, objects to be thrown are different, the conventional throwing unmanned aerial vehicle cannot carry out the throwing task on special geographical positions such as a middle room of a high-rise building, a cliff platform and the like, and the limitation is large; and the unmanned aerial vehicle jettisonings device is thrown for singly hanging, and a steering wheel can only control the throwing of the single article of hanging on a connecting rod, can't realize the throwing to a plurality of scene positions, and inefficiency, and the application is narrow.

Disclosure of Invention

The invention aims to solve the problems and designs a non-contact material throwing unmanned aerial vehicle.

The invention has the technical scheme that the non-contact material throwing unmanned aerial vehicle comprises an unmanned aerial vehicle body, wherein a shell is detachably arranged at the bottom of the unmanned aerial vehicle body, an upper power cavity, a middle storage cavity and a lower throwing cavity are sequentially arranged in the shell from top to bottom, a dropping hole communicated with the lower throwing cavity is formed in the bottom of the middle storage cavity, a throwing channel is transversely arranged in the lower throwing cavity, a telescopic sleeve is arranged at an outlet of the throwing channel, a cylindrical main shaft cavity is vertically arranged at the center of the shell, a lower rotating shaft is rotatably arranged in the main shaft cavity, a torsional spring for generating resistance to the rotation of the lower rotating shaft is arranged on the lower rotating shaft, a lower shifting lever extending into the lower throwing cavity is arranged on the lower shifting lever, a lower shifting plate is arranged on the lower shifting lever, and an upper rotating shaft is connected to the upper rotating shaft through an electromagnetic clutch, the upper layer rotating shaft is provided with four upper layer driving levers extending into the middle layer storage cavity, the four upper layer driving levers are distributed along the axis of the upper layer rotating shaft in a circumferential manner, the upper layer driving levers are provided with an upper layer driving plate used for driving a material bag to be thrown in the middle layer storage cavity and enabling the material bag to pass through a falling opening, and the top end of the upper layer rotating shaft is rotatably arranged in the upper layer power cavity and is provided with a first gear; further comprising:

the power mechanism is arranged in the upper power cavity and drives the first gear to rotate and the telescopic sleeve to stretch;

the material control mechanism is arranged at the top of the lower layer feeding cavity and used for opening and closing the falling opening, and the lower layer shifting plate and the material control mechanism are matched to drive the lower layer shifting plate to open the falling opening.

Preferably, the power mechanism comprises a driven shaft rotatably mounted in the upper power cavity, a second gear mounted on the driven shaft and meshed with the first gear, an electric push rod fixedly mounted in the upper power cavity, a chute guide rail fixedly mounted in the upper power cavity, a sliding plate slidably mounted in the chute guide rail, a connecting plate connected with the telescopic end of the electric push rod and the sliding plate, a rack located on one side of the sliding plate and meshed with the second gear, a spring guide rod with two ends respectively fixedly mounted on the rack and the sliding plate, and an electromagnet fixedly mounted on the sliding plate and used for adsorbing the rack to enable the rack to be separated from the second gear; one end of the sliding plate extends out of the upper power cavity and is provided with a connecting rod, and the connecting rod is connected with one end, far away from the falling opening, of the telescopic sleeve.

Preferably, the material control mechanism comprises a winding mechanism fixed at the rear part of the falling port, a flexible belt, a transverse moving plate, a dovetail chute rail, a dovetail slider, a first stay wire winding box, a dovetail groove, a strip dovetail block, a limiting block and a second stay wire winding box, wherein one end of the flexible belt is fixed and wound on the winding mechanism and is used for closing the falling port so as to allow a material bag to be put in to pass through, the transverse moving plate is fixed at the other end of the flexible belt, the dovetail chute rail is fixed at the left side of the falling port, the dovetail slider is arranged in the dovetail chute rail in a sliding mode and is fixedly connected with the transverse moving plate, the first stay wire winding box is fixed at the front part of the falling port and is connected with the dovetail slider, the dovetail groove is formed in the transverse; wherein the flexible belt is always kept in a tensioned state.

Preferably, the winding mechanism comprises two vortex spring seats fixed in the lower layer throwing cavity, a winding roller rotatably mounted in the vortex spring seats, and a vortex spring mounted in the vortex spring seats and connected with the winding roller.

Preferably, the power mechanism drives the first gear to rotate in the torsion spring force storage direction, and the edge of the inner side wall of the falling opening is an upward inclined surface along the torsion spring force storage direction.

Preferably, follow upper strata pivot axis is a little and is established plane rectangular coordinate system as the center, the passageway of puting in is located the first quadrant, the whereabouts mouth is located the second quadrant, the lower floor plectrum holds the power direction along the torsional spring and passes through fourth quadrant, third quadrant and second quadrant in proper order.

Preferably, the shell is provided with a storage door corresponding to the middle storage cavity, and one end of the storage door is hinged to the shell, while the other end is detachably connected with the shell.

Preferably, the middle-layer storage cavity and the main shaft cavity form an annular channel for the material bag to be put to pass through.

Preferably, the lower part of the lower layer throwing cavity and the main shaft cavity form an arc-shaped channel for the material bag to be thrown to pass through, and the throwing channel is tangent to the arc-shaped channel.

The invention has the beneficial effects that: by adopting a transverse ejection mode, the projected material packet has a certain transverse speed, so that the articles can be projected to application scenes of special geographic positions such as a middle room of a high-rise building, a cliff platform and the like; the middle level holds four goods and materials packages of intracavity portability, can throw in the goods and materials package one by one, can realize throwing to a plurality of different scene positions, improves the flexibility that the goods and materials were thrown in.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a top cross-sectional view of the upper power chamber;

FIG. 5 is a top cross-sectional view of the middle storage compartment;

fig. 6 is a top sectional view of the lower dispensing chamber (torsion spring unloaded state);

fig. 7 is a second sectional top view of the lower throwing chamber (the power accumulation state of the torsion spring);

fig. 8 is a top sectional view three of the lower throwing chamber (the torsion spring releases the elastic force);

FIG. 9 is a partial schematic view of a material control mechanism;

fig. 10 is a partial enlarged view of B in fig. 6;

in the figure, 1, an unmanned aerial vehicle body;

2. a housing; 21. an upper power cavity; 22. a middle storage cavity; 23. a lower layer throwing cavity; 231. a throwing channel; 24. a drop opening; 25. a main shaft cavity;

3. a telescopic sleeve;

401. a lower layer rotating shaft; 402. a lower layer deflector rod; 403. a material bag; 404. a torsion spring; 405. a lower shifting plate; 406. an electromagnetic clutch; 407. an upper layer rotating shaft; 408. an upper layer deflector rod; 409. an upper layer shifting plate; 410. a first gear;

5. a power mechanism; 501. a driven shaft; 502. a second gear; 503. an electric push rod; 504. a chute guide; 505. a slide plate; 506. a connecting plate; 507. a rack; 508. a spring guide rod; 509. an electromagnet; 510. a connecting rod;

6. a material control mechanism; 61. a winding mechanism; 611. a volute spring seat; 612. a wind-up roll; 613. a volute spring; 601. a flexible band; 602. transversely moving the plate; 603. a dovetail chute track; 604. a dovetail slide block; 605. a first pull wire take-up box; 606. a dovetail groove; 607. a strip dovetail block; 608. a limiting block; 609. a second wire take-up box;

71. a first quadrant; 72. a second quadrant; 73. a third quadrant; 74. a fourth quadrant;

8. a storage door.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1-10, a non-contact material throwing unmanned aerial vehicle comprises an unmanned aerial vehicle body 1, wherein a shell 2 is detachably mounted at the bottom of the unmanned aerial vehicle body 1, the shell 2 can be detachably mounted at the bottom of the unmanned aerial vehicle body 1 by mounting an L-shaped connecting piece at the bottom of the unmanned aerial vehicle body 1, the unmanned aerial vehicle body 1 is an unmanned aerial vehicle in the prior art, but the unmanned aerial vehicle can be a hovering unmanned aerial vehicle such as a rotor unmanned aerial vehicle or a composite wing unmanned aerial vehicle, so as to realize hovering throwing function; an upper power cavity 21, a middle storage cavity 22 and a lower throwing cavity 23 are sequentially arranged in a shell 2 from top to bottom, a falling opening 24 communicated with the lower throwing cavity 23 is formed in the bottom of the middle storage cavity 22, a throwing channel 231 is transversely arranged in the lower throwing cavity 23, a telescopic sleeve 3 is installed at the outlet of the throwing channel 231, a cylindrical main shaft cavity 25 is vertically arranged in the center of the shell 2, the main shaft cavity 25 is positioned between the middle storage cavity 22 and the lower throwing cavity 23, a lower rotating shaft 401 is rotatably installed in the main shaft cavity 25, the lower rotating shaft 401 is installed at the bottom of the lower throwing cavity 23 through a bearing seat, a torsion spring 404 for generating resistance to the rotation of the lower rotating shaft 401 is installed on the lower rotating shaft 401, one end of the torsion spring 404 is fixed in the main shaft cavity 25, the other end of the torsion spring is fixedly connected with the lower rotating shaft 401, a lower deflector rod 402 extending into the lower, the lower layer shifting plate 405 is used for shifting the material bag 403 in the lower layer throwing cavity 23 to the throwing channel 231, the upper end of the lower layer rotating shaft 401 is connected with an upper layer rotating shaft 407 through an electromagnetic clutch 406, the upper layer rotating shaft 407 is provided with four upper layer shifting rods 408 extending into the middle layer storage cavity 22, the four upper layer shifting rods 408 are circumferentially distributed along the axis of the upper layer rotating shaft 407, the upper layer shifting rods 408 are provided with upper layer shifting plates 409 used for shifting the material bag 403 to be thrown in the middle layer storage cavity 22 and enabling the material bag to pass through the falling port 24, the material bag 403 to be thrown in is arranged between the adjacent upper layer shifting plates 409, non-fragile articles such as medical gauze or food are arranged in the material bag 403, the top end of the upper layer rotating shaft 407 is rotatably arranged in the upper layer power cavity 21 and is provided with a first gear 410, and the top end of the upper layer rotating shaft 407 is arranged at the top of; further comprising: the power mechanism 5 is arranged in the upper power cavity 21, and the power mechanism 5 drives the first gear 410 to rotate and the telescopic sleeve 3 to stretch; the material control mechanism 6 is arranged at the top of the lower layer throwing cavity 23 and used for opening and closing the falling opening 24, and the lower layer poking plate 405 is matched with the material control mechanism 6 to drive the same to open the falling opening 24.

Preferably, in order to drive the first gear 410 to rotate in one direction, so that the upper shifting plate 409 pushes the material bag 403 to be thrown into the middle storage cavity 22 to the falling opening 24, the torsion spring 404 deforms to store force, and simultaneously the telescopic sleeve 3 is driven to extend, so as to increase the horizontal moving distance when the material bag 403 is thrown out of the falling opening 24 and improve the transverse delivery distance, a power mechanism 5 is provided, as shown in fig. 3-4, the power mechanism 5 comprises a driven shaft 501 rotatably mounted in the upper power cavity 21, a second gear 502 mounted on the driven shaft 501 and engaged with the first gear 410, an electric push rod 503 fixedly mounted in the upper power cavity 21, a chute guide rail 504 fixedly mounted in the upper power cavity 21, a sliding plate 505 slidably mounted in the chute guide rail 504, a connecting plate 506 connected with the telescopic end of the electric push rod 503 and the sliding plate 505, a rack 507 positioned on one side of the sliding plate 505 and engaged with the second gear 502, and a rack 507, a rack mounted on one side, A spring guide rod 508 with two ends respectively fixedly arranged on the rack 507 and the sliding plate 505, and an electromagnet 509 fixedly arranged on the sliding plate 505 and used for adsorbing the rack 507 so as to separate the rack 507 from the second gear 502; one end of the sliding plate 505 extends out of the upper power cavity 21 and is provided with a connecting rod 510, and the connecting rod 510 is connected with one end of the telescopic sleeve 3 far away from the falling port 24; the chute guide 504 is arranged to guide the sliding plate 505, so that the sliding plate 505 can move stably along the extension and contraction direction of the electric push rod 503; the number of the spring guide rods 508 is two, so that the sliding plate 505 can drive the rack 507 to move, and meanwhile, the rack 507 can be close to or far away from the sliding plate 505 in the horizontal direction; the number of teeth of the second gear 502 is greater than that of the first gear 410, so that the first gear 410 can be driven to rotate by a larger angle under the condition that the extension range of the electric push rod 503 is smaller, meanwhile, the arrangement of the second gear 502 and the first gear 410 plays a reversing role, and when the extension end of the electric push rod 503 is contracted to drive the extension sleeve 3 to extend, the first gear 410 is also driven to rotate along the power accumulation direction of the torsion spring 404; the rack 507 is made of ferromagnetic material, preferably iron, so that the electromagnet 509 can adsorb the ferromagnetic material.

Preferably, in order to ensure that the material bag 403 in the middle storage cavity 22 cannot fall from the falling port 24 when the lower layer shifting plate 405 or the upper layer shifting plate 409 rotates to the third quadrant 73 or the fourth quadrant 74, and simultaneously, when the lower layer shifting plate 405 passes through the second quadrant 72, the falling port 24 can be opened to enable the material bag 403 to fall to the lower layer throwing cavity 23, the material control mechanism 6 is arranged; as shown in fig. 3 and fig. 6-10, the material control mechanism 6 includes a winding mechanism 61 fixed at the rear part of the drop opening 24, a flexible belt 601 with one end fixed and wound on the winding mechanism 61 and used for closing the drop opening 24 and allowing the material package 403 to be thrown in to pass through, a traverse plate 602 fixed at the other end of the flexible belt 601, a dovetail chute rail 603 fixed at the left side of the drop opening 24, a dovetail slider 604 slidably arranged in the dovetail chute rail 603 and fixedly connected with the traverse plate 602, a first pull wire winding box 605 fixed at the front part of the drop opening 24 and connected with the dovetail slider 604, a dovetail groove 606 arranged on the traverse plate 602, a strip-shaped dovetail block 607 slidably arranged in the dovetail groove 606, a limit block 608 fixed at the right end of the strip-shaped dovetail block 607, and a second pull wire winding box 609 fixedly arranged at the left side of the traverse plate 602 and connected with the strip-shaped dovetail block 607; wherein, the flexible belt 601 is always kept in a tension state to bear the material bag 403 to pass through the falling port 24; when the lower shifting plate 405 passes through the third quadrant 73 and the second quadrant 72, the lower shifting plate 405 is in contact with the strip-shaped dovetail block 607, when the lower shifting plate 405 passes through the second quadrant 72, the strip-shaped dovetail block 607 and the transverse moving plate 602 are pushed to move towards the rolling mechanism 61, the flexible belt 601 is rolled to gradually open the falling port 24, and the falling port 24 can be opened so that the material bag 403 falls from the falling port 24 to the lower throwing cavity 23; through the arrangement of the dovetail chute rails 603 and the dovetail sliding blocks 604, the traverse moving plate 602 can be supported to be capable of horizontally moving; the flexible belt 601 can be a canvas belt, and the flexible belt 601 is attached to the top wall of the lower throwing cavity 23; in order to ensure that the falling opening 24 is opened to the size which can be used for the material bag 403 to fall, a dovetail groove 606, a strip-shaped dovetail block 607 and a limiting block 608 are arranged, so that when the lower layer shifting plate 405 rotates to the position between the edge of the traverse plate 602 and the throwing channel 231, the lower layer shifting plate 405 can still be connected with the traverse plate 602 through the strip-shaped dovetail block 607 and the limiting block 608, the lower layer shifting plate 405 cannot be separated from the traverse plate 602, the flexible belt 601 is continuously wound on the winding roller 612, and the falling opening 24 is completely opened.

Preferably, in order to keep flexible band 601 always in a tensioned state and simultaneously realize the function that flexible band 601 gradually opens drop opening 24, winding mechanism 61 is provided, as shown in fig. 6-10, winding mechanism 61 includes two vortex spring seats 611 fixed in lower layer throwing cavity 23, a winding roller 612 rotatably installed in vortex spring seat 611, and a vortex spring 613 installed in vortex spring seat 611 and connected to winding roller 612; when the flexible band 601 closes the dropping hole 24, the volute spring 613 is in an elastic deformation state, and in the process of pushing the strip-shaped dovetail block 607 and the traverse plate 602 to move towards the winding roller 612, the volute spring 613 serves as a power element to drive the winding roller 612 to rotate, so that the flexible band 601 is wound, and the flexible band 601 is kept in a tension state, so that the material packet 403 on the flexible band 601 can smoothly pass through the dropping hole 24 at the moment, and the next material packet 403 can drop from the dropping hole 24.

Preferably, the power mechanism 5 drives the first gear 410 to rotate in the direction of the force accumulation of the torsion spring 404, so that the material bag 403 can smoothly pass through the dropping hole 24 after being loaded by the flexible belt 601 during the force accumulation of the torsion spring 404, as shown in fig. 3, the edge of the inner side wall of the dropping hole 24 is arranged to be an upward inclined surface along the force accumulation direction of the torsion spring 404, so as to prevent the material bag 403 from being clamped between the flexible belt 601 and the dropping hole 24.

Preferably, as shown in fig. 5, in order to increase the horizontal distance projected by the material bag 403 and increase the torsion of the torsion spring 404, a planar rectangular coordinate system is established by taking one point along the axis of the upper layer rotating shaft 407 as the center, the throwing channel 231 is located in the first quadrant 71, the falling opening 24 is located in the second quadrant 72, and the lower layer shifting plate 405 sequentially passes through the fourth quadrant 74, the third quadrant 73 and the second quadrant 72 along the force accumulation direction of the torsion spring 404; thus, initially, the lower dial plate 405 is clamped at the entrance of the drop passage 231, that is, at the approximate intersection of the first quadrant 71 and the fourth quadrant 74, the lower dial plate 405 sequentially passes through the fourth quadrant 74, the third quadrant 73 and the second quadrant 72, and rotates approximately 270 degrees, so that the torsion of the torsion spring 404 is as large as possible, and the elasticity of the torsion spring 404 is improved.

Preferably, in order to facilitate the material pack 403 to be placed in the middle storage chamber 22, as shown in fig. 5, a storage door 8 corresponding to the middle storage chamber 22 is installed on the housing 2, and one end of the storage door 8 is hinged to the housing 2 and the other end is detachably connected to the housing 2. One end of the storage door 8 can be hinged with the shell 2 through a hinge, the other end of the storage door can be detachably connected with the shell 2 through a hasp lock component, the hasp lock component can adopt a safety hasp lock, namely, a self-locking device is added on the basis of the hasp lock, so that the hasp lock is not randomly opened or bounced, and a safety effect can be achieved. The above connection modes are prior arts, and other prior art modes of separable connection are also protected by the present invention, and are not described again.

Preferably, in order to make the upper layer dial plate 409 smoothly dial the material bag 403 to move circularly in the middle layer accommodating cavity, as shown in fig. 5, the middle layer storage cavity 22 and the main shaft cavity 25 are arranged to form an annular channel for the material bag 403 to be put in to pass through, the storage door 8 is an arc door with a shape matched with that of the middle layer storage cavity 22, when the storage door 8 is closed, the inner wall of the storage door 8 and the inner wall of the middle layer storage cavity 22 are smooth and excessive and have substantially no concave-convex part, so as to ensure that the material bag 403 can smoothly pass through without being clamped at the joint of the storage door 8 and the housing 2.

Preferably, in order to improve the material projection effect and avoid the material from impacting the inner wall of the lower-layer throwing cavity 23, as shown in fig. 6-8, the lower part of the lower-layer throwing cavity 23 and the main shaft cavity 25 are arranged to form an arc-shaped channel through which the material bag 403 to be thrown passes, and the throwing channel 231 is tangent to the arc-shaped channel, so that when the torsion spring 404 releases the elastic force, the lower-layer shifting plate 405 drives the material in the second quadrant 72 in the arc-shaped channel to sequentially pass through the third quadrant 73 and the fourth quadrant 74, the lower-layer shifting plate 405 is limited by the main shaft cavity 25 at the junction of the fourth quadrant 74 and the first quadrant 71 to stop rotating continuously, at this time, the lower-layer shifting plate 405 is approximately perpendicular to the arc-shaped channel, the force applied by the lower-layer shifting plate 405 to the material bag 403 is approximately parallel to the axis of the arc-shaped channel.

The working steps of the embodiment are as follows:

firstly, the unmanned aerial vehicle body 1 is suspended and stopped after flying to a proper position, the telescopic end of the electric push rod 503 is contracted, the electromagnetic clutch 406 is electrified to enable the upper layer rotating shaft 407 and the lower layer rotating shaft 401 to be in transmission connection, the connecting plate 506 drives the sliding plate 505, the spring guide rod 508 and the rack 507 to move, the rack 507 drives the second gear 502, the first gear 410, the upper layer rotating shaft 407 and the lower layer rotating shaft 401 to rotate, the upper layer rotating shaft 407 and the lower layer rotating shaft 401 rotate approximately 270 degrees clockwise, the torsion spring 404 deforms and accumulates force, during the period, the front 180 degrees approximately still close or incompletely open the falling opening 24 due to the flexible belt 601, therefore, two passing material packages 403 cannot fall down from the falling opening 24, when the lower layer dial plate 405 rotates to the second quadrant 72, the strip-shaped dovetail block 607 and the transverse moving plate 602 are gradually pushed to the winding roller 612 to move to a large extent, the first wire winding box 605 is pulled out, the flexible belt 601 is wound on, the strip-shaped dovetail block 607 slides in the dovetail groove 606 relative to the transverse moving plate 602, the pull wire of the second pull wire coiling box 609 is pulled out, the falling opening 24 is gradually opened, the rear angle is approximately 90 degrees, the upper layer shifting plate 409 positioned at the junction of the third quadrant 73 and the fourth quadrant 74 is approximately moved to the junction of the third quadrant 73 and the second quadrant 72, the material bag 403 is shifted to the opened falling opening 24, and at the moment, the lower layer shifting plate 405 is approximately moved to the junction of the first quadrant 71 and the second quadrant 72; the connecting rod 510 drives the telescopic sleeve 3 to be fully extended, and the inner wall of the telescopic sleeve 3 is approximately smooth at the moment so that the material bag 403 can smoothly pass through;

step two, the electromagnetic clutch 406 is powered off, the lower layer rotating shaft 401 rotates under the action of the elastic restoring force of the torsion spring 404, the lower layer poking plate 405 pokes the material bag 403 falling into the lower layer throwing cavity 23 from the falling port 24 to the throwing channel 231, and the material bag 403 is projected out after passing through the arc-shaped channel, the throwing channel 231 and the telescopic sleeve 3 and reaches a pre-calculated throwing point; the pulling force of the first wire winding box 605 is greater than the elastic force of the volute spring 613, after the lower shifting plate 405 is separated from the strip-shaped dovetail block 607, the flexible strip 601 closes the falling opening again under the pulling force of the first wire winding box 605, and the strip-shaped dovetail block 607 is reset under the pulling force of the second wire winding box 609.

Step three, the electromagnet 509 is electrified to adsorb the rack 507, so that the rack 507 is not contacted with the second gear 502 any more, the electric push rod 503 drives the rack 507 to reset, then the electromagnet 509 is powered off, and under the action of the spring guide rod 508, the rack 507 resets and is meshed with the second gear 502 again;

step four, repeating the steps 1-3, so that the material packages 403 which are initially positioned in the first quadrant 71, the fourth quadrant 74, the third quadrant 73 and the second quadrant 72 can be delivered in sequence.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.