Material delivery device and drone

Abstract

The present invention discloses a material delivery device and an unmanned aerial vehicle. The material delivery device comprises: a first pushing member; a material fixing portion; a plurality of the material fixing portions are arranged around the first pushing member, and the first pushing member can rotate to push the materials loaded in different material fixing portions. The unmanned aerial vehicle comprises the above-mentioned material delivery device. The material delivery device in the present invention only needs to be provided with one pushing member, which reduces the number of components, simplifies the structure, and reduces the cost to a certain extent.

Description

Technical Field

[0001] The present invention relates to the field of aircraft, and in particular to a material delivery device and an unmanned aerial vehicle. Background Art

[0002] Drones have been widely used in various fields due to their advantages such as portability and flexible movement trajectories. In addition to aerial photography, drones can also perform other tasks such as material delivery and environmental monitoring. When using drones for material delivery, in order to improve delivery efficiency, multiple materials are usually loaded on the drone at the same time, and a pushing component is set above each material to push each material out of the drone's storage bin. However, setting up multiple pushing components will increase the number of components, make the structure more complex, and increase the load of the drone. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a material delivery device, which only needs to be provided with one pusher, thereby reducing the number of components, simplifying the structure, and reducing the cost to a certain extent.

[0004] The present invention also proposes a drone, in which a material delivery device only needs to be provided with one pushing member, thereby reducing the number of components, simplifying the structure, reducing the cost to a certain extent, and reducing the weight of the drone.

[0005] One embodiment of the present invention provides a material delivery device, comprising:

[0006] A first pusher;

[0007] Material Fixing Department;

[0008] A plurality of the material fixing parts are arranged around the first pushing member, and the first pushing member can rotate to push the materials loaded in different material fixing parts.

[0009] The material delivery device of the embodiment of the present invention has at least the following beneficial effects: a plurality of material fixing parts are arranged around the first pushing member, and by rotating the first pushing member, the materials loaded in different material fixing parts can be pushed out, without setting a plurality of pushing members to push each material separately. Therefore, the number of components can be reduced, the structure can be simplified, and the cost can be reduced to a certain extent.

[0010] According to some other embodiments of the present invention, the material delivery device further includes a vertical driving member and a rotating driving member, wherein the vertical driving member is connected to the rotating driving member, and the rotating driving member is connected to the first pushing member, and the rotating driving member is used to drive the first pushing member to rotate around a vertical axis, and the vertical driving member is used to drive the rotating driving member to move in a vertical direction.

[0011] According to some other embodiments of the present invention, the material delivery device further comprises an elastic member, a sleeve and a guide member, the top of the elastic member abuts against the first pushing member, the first pushing member is provided with a first serration, the outer side wall of the first pushing member is provided with a first protrusion, and the top surface of the first protrusion is a first inclined surface inclined relative to the horizontal plane;

[0012] The guide member is located above the first push member, the guide member is provided with a second sawtooth portion, the outer wall of the guide member is provided with a second protrusion, and the first sawtooth portion can be engaged with the second sawtooth portion to rotate the first push member from the first position to the second position;

[0013] The sleeve is located outside the first pushing member and the guide member, and a third protrusion is provided on the inner wall of the sleeve, and a guide groove is formed between adjacent third protrusions. The second protrusion is located in the guide groove and can slide along the guide groove. The bottom surface of the third protrusion is a second inclined surface inclined relative to the horizontal plane, and the second inclined surface can be fitted with the first inclined surface to enable the first pushing member to rotate from the second position to the third position.

[0014] According to some other embodiments of the material delivery device of the present invention, when the first pushing member is in the first position, the first protrusion and the second protrusion are both located in the guide groove, and the first serrated portion is partially engaged with the second serrated portion; when the first pushing member is in the second position, the first protrusion is disengaged from the guide groove, the first serrated portion is fully engaged with the second serrated portion, and the first inclined surface is in contact with the second inclined surface; when the first pushing member is in the third position, the first protrusion and the next second protrusion in the rotation direction of the first pushing member are both located in the next guide groove in the rotation direction of the first pushing member.

[0015] According to some other embodiments of the material delivery device of the present invention, the material fixing part includes an upper shell, a bottom support and a first torsion spring, the bottom support and the upper shell define a accommodating cavity, the accommodating cavity is used to accommodate the material, the bottom support and the upper shell are rotatably connected via the first torsion spring, and the bottom support can rotate relative to the upper shell to release and support the material.

[0016] According to some other embodiments of the present invention, the material delivery device further includes a fixing member connected to the upper shell, the fixing member is used to fix the first part of the material, and the first pushing member is used to push the second part of the material to separate from the first part.

[0017] According to some other embodiments of the material delivery device of the present invention, the material fixing portion further includes a second torsion spring, the fixing piece is rotatably connected to the upper shell via the second torsion spring, and the second torsion spring is used to drive the fixing piece to rotate so as to clamp the first portion between the fixing piece and the upper shell.

[0018] According to some other embodiments of the material delivery device of the present invention, the material fixing part further includes a second pushing member, the first pushing member is located above the second pushing member, and the second pushing member can extend into the accommodating cavity to push the second part under the push of the first pushing member.

[0019] According to some other embodiments of the material delivery device of the present invention, the material fixing portion further includes a connecting member, the second pushing member and the base support are both rotatably connected to the connecting member, and the second pushing member pushes the base support to rotate downward via the connecting member.

[0020] One embodiment of the present invention provides a drone, comprising the above-mentioned material delivery device.

[0021] The drone of the embodiment of the present invention has at least the following beneficial effects: in the material fixing part of the drone, multiple material fixing parts are arranged around the first pushing member, and the materials loaded in different material fixing parts can be pushed out by rotating the first pushing member, without setting multiple pushing members to push each material separately. Therefore, the number of components can be reduced, the structure can be simplified, and the cost can be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the material fixing part and the first pushing member and other components in the first embodiment;

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the first pusher, guide member, sleeve and other components;

[0024] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle sleeve;

[0025] Figure 4 yes Figure 1 A schematic diagram of the structure when the first sawtooth portion and the second sawtooth portion are partially engaged;

[0026] Figure 5 yes Figure 1 A schematic diagram of the structure when the first sawtooth portion and the second sawtooth portion are fully meshed;

[0027] Figure 6 yes Figure 1 Exploded view of the material fixing part;

[0028] Figure 7 yes Figure 1 Schematic diagram of the structure when the material fixing part is loaded with materials;

[0029] Figure 8 yes Figure 1 Schematic diagram of the structure of the material fixing part when waiting to load materials;

[0030] Fig. 9 is a partial structural schematic diagram of the drone in the second embodiment;

[0031] Fig.10 yes Fig. 9 A bottom view of part of the structure of the drone.

[0032] Reference numerals:

[0033] Material fixing part 100, upper shell 110, limiting member 111, pushing groove 112, opening 113, bottom support 120, accommodating cavity 130, fixing member 140, first torsion spring 150, second torsion spring 160, second pushing member 170, pushing plate 171, pushing rod 172, connecting member 180, grenade 200, pulling ring 210, first pushing member 300, lower pushing arm 310, first serrated portion 320, first protrusion 330, first inclined surface 331, guiding member 400, second serrated portion 410, second protrusion 420, sleeve 500, third protrusion 510, second inclined surface 511, guiding groove 520, elastic member 600, base 700, driving member 800, motor compartment 910, hanging portion 920, height measuring portion 930, camera 940. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0035] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected to the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] Reference Figure 1 , a plurality of material fixing parts 100 are distributed in a ring shape around the first pushing member 300 , and the first pushing member 300 can rotate around a vertical axis to push out materials loaded on different material fixing parts 100 .

[0038] Reference Figures 6 to 8 In some embodiments, the material fixing part 100 includes an upper shell 110 and a bottom support 120. The upper shell 110 is located above the bottom support 120. The two define a receiving cavity 130 for receiving the material. The bottom support 120 and the upper shell 110 are rotatably connected via a first torsion spring 150. The first torsion spring 150 can drive the bottom support 120 to rotate upward to support the material. The first pusher 300 can push the material downward to drive the bottom support 120 to rotate downward, open the receiving cavity 130, and separate the material from the receiving cavity 130.

[0039] Reference Figures 6 to 8 In some embodiments, the material is a grenade 200, which includes a first part and a second part, wherein the first part is a pull ring 210 of the grenade 200, and the second part is a main body of the grenade 200. When the grenade 200 is released, the main body of the grenade 200 needs to be separated from the pull ring 210 and then pushed out of the accommodating cavity 130. Therefore, the pull ring 210 can be fixed by a fixing member 140 to ensure that the pull ring 210 is still fixed on the material fixing part 100 when the main body of the grenade 200 is pushed out.

[0040] In some embodiments, the fixing member 140 is rotatably connected to the upper shell 110 through the second torsion spring 160, and the rebound force of the second torsion spring 160 drives the fixing member 140 to rotate in the direction close to the upper shell 110 to clamp the pull ring 210. The top of the upper shell 110 is provided with an opening 113, and the pull ring 210 can extend through the opening 113 and be clamped between the fixing member 140 and the upper shell 110. When the grenade 200 is released, the first pusher 300 pushes the main part of the grenade 200 downward, thereby squeezing the bottom support 120 to rotate downward, and the accommodating cavity 130 opens. Since the pull ring 210 is clamped by the fixing member 140, when the main part of the grenade 200 is separated from the accommodating cavity 130, the pull ring 210 remains on the material fixing part 100, and the main part will be separated from the pull ring 210. Since the first torsion spring 150 is provided, the base 120 will automatically reset after the grenade 200 is separated from the accommodating cavity 130 .

[0041] Of course, other methods can be used to fix the pull ring 210. For example, a hook can be provided on the upper shell 110, and the hook can be hung on the pull ring 210. When the main part of the grenade 200 is pushed out, the hook pulls the pull ring 210, thereby achieving separation. However, compared with this method, the method in the above embodiment is easier to operate when loading the grenade 200. The pull ring 210 can be fixed by simply pulling the fixing member 140 outward and resetting it.

[0042] Reference Figure 1 , Figure 6 and Figure 8 In some embodiments, a second pushing member 170 is provided. After the grenade 200 is loaded into the accommodating cavity 130, the second pushing member 170 is located above the grenade 200. The second pushing member 170 can extend into the accommodating cavity 130 under the push of the first pushing member 300 and push the grenade 200 downward.

[0043] Reference Figure 6 and Figure 7 In some embodiments, a limiting member 111 is provided on the upper shell 110. The second pushing member 170 includes a push plate 171, which is located below the limiting member 111 and is used to push the grenade 200. After the grenade 200 is released, when the push plate 171 moves upward to reset, the limiting member 111 can block the push plate 171 to limit the position.

[0044] In some embodiments, the upper shell 110 is provided with a pushing groove 112, the second pushing member 170 further includes a pushing rod 172, and the pushing plate 171 is connected to the bottom of the pushing rod 172. The pushing groove 112 extends in the vertical direction and is connected to the accommodating cavity 130. The pushing rod 172 is located in the pushing groove 112. The pushing rod 172 pushes the grenade 200 along the pushing groove 112. The pushing groove 112 guides the pushing rod 172 to make the pushing process more stable.

[0045] Reference Figure 6 and Figure 8 In some embodiments, the second pusher 170 also pushes the base 120 downward, so that the accommodating cavity 130 is easier to open and the grenade 200 is easier to escape from the accommodating cavity 130. Specifically, a connecting member 180 is provided, and the top end of the connecting member 180 is rotatably connected to the second pusher 170, and the bottom end is rotatably connected to the base 120. While the second pusher 170 pushes the grenade 200 downward, the base 120 is also pushed downward through the connecting member 180. By providing the connecting member 180 between the second pusher 170 and the base 120, the rotation process of the base 120 can be made more stable and smooth.

[0046] Reference Figure 6 In some embodiments, the side of the base 120 that contacts the grenade 200 is designed to be a curved surface that matches the shape of the grenade 200 to enhance the positioning of the grenade 200 and reduce its shaking in the accommodating cavity 130.

[0047] Reference Figures 1 to 3 In some embodiments, the first push member 300 is provided with a push arm 310 extending outward, which is used to push the second push member 170. A first sawtooth portion 320 is provided on the top surface of the first push member 300, including a plurality of saw teeth. A first protrusion 330 is also provided on the outer wall of the first push member 300, and the top surface of the first protrusion 330 is a first inclined surface 331 inclined relative to the horizontal plane, and the first inclined surface 331 is coplanar with the inclined surface of one of the saw teeth. The elastic member 600 is sleeved on the outside of the first push member 300, and the bottom of the elastic member 600 is fixedly connected to the base 700, and the top is blocked by the bottom surface of the push arm 310. The guide member 400 is located above the first push member 300, and the guide member 400 is provided with a second sawtooth portion 410, including a plurality of saw teeth. A plurality of second protrusions 420 extending in the vertical direction are provided on the outer wall of the guide member 400. The bottom end of the guide member 400 can extend into the first push member 300. If the first protrusion 330 is aligned with any of the second protrusions 420, the second sawtooth portion 410 is partially engaged with the first sawtooth portion 320. The partial engagement here means that the saw teeth in the second sawtooth portion 410 are not completely in contact with the saw teeth in the first sawtooth portion 320. Figure 4As shown, it is a partially engaged state. The sleeve 500 is located outside the first push member 300 and the guide member 400. A plurality of third protrusions 510 extending in the vertical direction are provided on the inner side wall of the sleeve 500, and guide grooves 520 are formed between adjacent third protrusions 510. Each second protrusion 420 is correspondingly located in a guide groove 520 and can slide along the guide groove 520. The bottom surface of the third protrusion 510 is a second inclined surface 511 inclined relative to the horizontal plane. When the second serrated portion 410 is fully engaged with the first serrated portion 320, the second inclined surface 511 contacts and fits with a portion of the first inclined surface 331. The full engagement here means that the saw teeth in the second serrated portion 410 are fully fitted with the saw teeth in the first serrated portion 320, as shown in FIG. Figure 5 As shown in FIG. 1 , it is in a fully engaged state. The first pusher 300 rotates a certain angle around the vertical axis to move from Figure 4 The state in Figure 5 Status in.

[0048] Reference Figures 1 to 5, the driving member 800 extends into the sleeve 500, and can drive the guide member 400 and the first push member 300 to move downward. The driving member 800 can be an electric push rod, and of course, a driving member such as a cylinder or a hydraulic cylinder can also be used. When the first push member 300 is in the first position, the first protrusion 330 and the second protrusion 420 are both located in the guide groove 520, and the first serration 320 is partially engaged with the second serration 410. When the driving member 800 pushes the guide member 400 to move downward, the first push member 300 moves synchronously with the guide member 400, and the first protrusion 330 and the second protrusion 420 both slide downward along the guide groove 520, and the elastic member 600 is in a compressed state. When the first protrusion 330 slides to a position separated from the guide groove 520, the driving member 800 stops pushing the guide member 400, and under the action of the rebound force of the elastic member 600, the first pusher 300 tends to move upward, and at the same time, the saw teeth in the second sawtooth portion 410 guide the saw teeth in the first sawtooth portion 320, so that the first pusher 300 rotates until the second sawtooth portion 410 is fully meshed with the first sawtooth portion 320. At this time, the first pusher 300 reaches the second position, and the second inclined surface 511 contacts and fits with a part of the first inclined surface 331. Similar to the above process, under the action of the rebound force of the elastic member 600, the first pusher 300 tends to move upward, and at the same time, the second inclined surface 511 guides the first inclined surface 331, so that the first pusher 300 rotates until the second inclined surface 511 is fully fit with the first inclined surface 331. At this time, the first pusher 300 reaches the third position, and the first protrusion 330 enters the adjacent guide groove 520. When the first pusher 300 reaches the first position and the third position, it is respectively located above two adjacent second pushers 170. In the process of the driving member 800 driving the first pusher 300 to move downward, not only can the main body of the grenade at this position be separated from its accommodating cavity, but the first pusher 300 can also be rotated to the top of the adjacent second pusher 170. Repeating the above process can push all the second pushers 170 in sequence. In addition, a plurality of first protrusions 330 can be provided on the first pusher 300 to improve the stability of the rotation process.

[0049] In some embodiments, a plurality of downward pushing arms 310 may be disposed on the first pushing member 300 . Each time the first pushing member 300 moves downward, it can push a plurality of second pushing members 170 to improve the delivery efficiency.

[0050] In some embodiments, a vertical driving member and a rotating driving member may be provided, the vertical driving member is connected to the rotating driving member, and the rotating driving member is connected to the first pushing member 300. For example, the vertical driving member is a cylinder, the rotating driving member is a rotating motor, the telescopic end of the cylinder is fixedly connected to the rotating motor, and the output shaft of the rotating motor is connected to the first pushing member 300. The first pushing member 300 is driven to rotate by the rotating motor, and the first pushing member 300 is pushed downward by the cylinder.

[0051] In the above-mentioned embodiments, only one first pushing member 300 is provided to push the materials loaded in the plurality of material fixing parts 100 . Compared with the conventional method, the number of components can be reduced, the device structure can be simplified, and the manufacturing cost can be reduced to a certain extent.

[0052] Reference Fig. 9 and Fig.10 In some embodiments, a drone is provided, on which are provided several sets of the above-mentioned material delivery devices. Compared with traditional manual delivery, loading and delivering grenades by drones can improve safety, and the more accurate positioning function of drones can improve the accuracy of grenade delivery positions, and more accurately strike targets.

[0053] In some embodiments, a hanging portion 920 is provided on the top of the motor compartment 910 , and the material fixing portion 100 and the motor compartment 910 can be hung on the bottom of the main body of the drone through the hanging portion 920 .

[0054] Reference Fig.10 In some embodiments, a height measuring unit 930 is provided at the bottom of the motor compartment 910 to measure the height of the drone from the throwing target. Specifically, the height measuring unit 930 can be a laser rangefinder, and of course, other commonly used measurement methods are also possible.

[0055] In some embodiments, a camera 940 is provided at the bottom of the motor compartment 910 for aerial photography so as to better understand the enemy situation before deployment.

[0056] With reference to all the accompanying drawings, the loading and delivery process of the grenade 200 is described as follows:

[0057] Before the drone takes off, the grenade 200 is loaded first. The driving member 800 drives the first pusher 300 to move downward, and the first pusher 300 pushes the bottom bracket 120 to rotate downward through the second pusher 170, so as to open the accommodating cavity 130, put the grenade 200 into the accommodating cavity 130, release the second pusher 170, and the bottom bracket 120 rotates upward and resets under the action of the rebound force of the first torsion spring 150. At the same time, the fixing member 140 is pulled away from the upper shell 110, and the pull ring 210 is pulled upward to the position between the fixing member 140 and the upper shell 110, and the fixing member 140 is released. The fixing member 140 rotates and resets in the direction close to the upper shell 110 under the action of the rebound force of the second torsion spring 160, and the pull ring 210 is stuck between the upper shell 110 and the fixing member 140. At this point, the grenade 200 is loaded, the drone takes off, flies to the vicinity of the target position, measures the height of the drone from the target position through the height measuring unit 930, and takes aerial photos through the camera 940 to understand the situation of the target position. After it is determined that it can be dropped, the push rod 172 is pushed downward, and the push plate 171 pushes the main part of the grenade 200 downward. At the same time, the second pusher 170 pushes the bottom bracket 120 to rotate downward through the connecting member 180. When the push plate 171 pushes the main part of the grenade 200 downward, the pull ring 210 is stuck between the upper shell 110 and the fixing member 140. After the push plate 171 is pushed down to a certain extent, the main part of the grenade 200 will be separated from the pull ring 210, the grenade is ignited, and the main part of the grenade 200 falls downward to the target position under the action of gravity. After the grenade at this position is dropped, the first pusher 300 rotates to the adjacent material fixing part 100, and the above-mentioned dropping process is repeated until all the grenades are dropped. In addition, in order to ensure that the pull ring 210 does not separate from the fixing member 140 and the upper shell 110 when the main part of the grenade 200 is pushed out, the torsion of the second torsion spring 160 needs to be large enough. For example, the torsion of the second torsion spring 160 can be greater than that of the first torsion spring 150.

[0058] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A material delivery device, used for delivering materials, characterized in that: include: A first pusher; Material Fixing Department; A plurality of the material fixing parts are arranged around the first pushing member, and the first pushing member can rotate to push the materials loaded in different material fixing parts; The material fixing part includes an upper shell, a bottom support and a first torsion spring, wherein the bottom support and the upper shell define a containing cavity, wherein the containing cavity is used to contain the material, and the bottom support and the upper shell are rotatably connected through the first torsion spring, and the bottom support can rotate relative to the upper shell to release and support the material; It also includes a fixing member, the fixing member is connected to the upper shell, the fixing member is used to fix the first part of the material, and the first pushing member is used to push the second part of the material to separate from the first part; The material fixing part further includes a second torsion spring, the fixing member is rotatably connected to the upper shell via the second torsion spring, and the second torsion spring is used to drive the fixing member to rotate so as to clamp the first part between the fixing member and the upper shell; The material fixing part further includes a second pushing member, the first pushing member is located above the second pushing member, and the second pushing member can extend into the accommodating cavity under the push of the first pushing member to push the second part.

2. The material delivery device according to claim 1, characterized in that: It also includes a vertical driving member and a rotating driving member, wherein the vertical driving member is connected to the rotating driving member, and the rotating driving member is connected to the first pushing member, and the rotating driving member is used to drive the first pushing member to rotate around a vertical axis, and the vertical driving member is used to drive the rotating driving member to move in a vertical direction.

3. The material delivery device according to claim 1, characterized in that: It also includes an elastic member, a sleeve and a guide member, the top of the elastic member abuts against the first push member, the first push member is provided with a first serration, the outer side wall of the first push member is provided with a first protrusion, and the top surface of the first protrusion is a first inclined surface inclined relative to the horizontal plane; The guide member is located above the first push member, the guide member is provided with a second sawtooth portion, the outer wall of the guide member is provided with a second protrusion, and the first sawtooth portion can be engaged with the second sawtooth portion to rotate the first push member from the first position to the second position; The sleeve is located outside the first pushing member and the guide member, and a third protrusion is provided on the inner wall of the sleeve, and a guide groove is formed between adjacent third protrusions. The second protrusion is located in the guide groove and can slide along the guide groove. The bottom surface of the third protrusion is a second inclined surface inclined relative to the horizontal plane, and the second inclined surface can be fitted with the first inclined surface to enable the first pushing member to rotate from the second position to the third position.

4. The material delivery device according to claim 3, characterized in that: When the first pushing member is in the first position, the first protrusion and the second protrusion are both located in the guide groove, and the first serrated portion is partially engaged with the second serrated portion; when the first pushing member is in the second position, the first protrusion is disengaged from the guide groove, the first serrated portion is fully engaged with the second serrated portion, and the first inclined surface is in contact with the second inclined surface; when the first pushing member is in the third position, the first protrusion and the next second protrusion in the rotation direction of the first pushing member are both located in the next guide groove in the rotation direction of the first pushing member.

5. The material delivery device according to claim 1, characterized in that: The material fixing part also includes a connecting piece, and the second pushing piece and the bottom bracket are both rotatably connected to the connecting piece, and the second pushing piece pushes the bottom bracket to rotate downward through the connecting piece.

6. A drone, characterized in that: The invention comprises the material delivery device according to any one of claims 1 to 5.

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