A material throwing device applied to a UAV

Abstract

This utility model belongs to the field of material delivery and provides a material delivery device for drones, comprising: a housing; a rotating body movably located at the center of the housing, with several storage compartments formed within the rotating body, each storage compartment having a corresponding opening and closing plate for opening or closing the storage compartment; a receiving mechanism detachably connected to the top wall of the housing, the receiving mechanism being adjustable in its relative position to the housing to adapt to the assembly and disassembly of external drones; and a drive mechanism located within the housing, the drive mechanism including an active component and a driven component distributed on both sides of the rotating body. Compared with the prior art, the advantages of this utility model are that it integrates multiple independent storage compartments through an integrated rotating body, combines a dual-gear meshing transmission system to precisely control the rotation angle, and is equipped with a detachable quick-change receiving mechanism to adapt to different drone models, achieving lightweight, high-precision, and rapid response multi-point continuous and accurate delivery of emergency supplies.

Description

Technical Field

[0001] This utility model belongs to the field of material throwing, specifically relating to a material throwing device for use with drones. Background Technology

[0002] With the rapid development of the low-altitude economy, drones are increasingly being used in emergency rescue. In disaster sites where roads, power, and internet are cut off, drones, as aerial corridors, can quickly reach the disaster area to perform tasks such as delivering supplies, broadcasting messages, providing lighting, and conducting disaster reconnaissance, becoming an important force in emergency response.

[0003] Currently, there are various drone-mounted material delivery devices on the market, but they generally suffer from the following problems:

[0004] 1. Small delivery capacity and limited product range: Most devices only support single-point delivery and cannot meet the continuous delivery needs of multiple types of supplies such as first aid kits, life rings, and drinking water.

[0005] 2. Low control precision: The transmission mechanism mostly uses belt drive, which is prone to slippage or positioning deviation, resulting in large errors in the landing point of materials.

[0006] 3. Limited loading methods: Traditional material delivery devices have complex assembly and disassembly structures with external drones, and their forms are too limited, making it difficult to quickly adapt to the assembly and operation of different drone models, which affects the efficiency and ease of operation. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a material delivery device for drones that features a simple structure, lightweight design, high precision, and rapid response, enabling continuous and accurate delivery of emergency supplies at multiple points.

[0008] The objective of this utility model can be achieved through the following technical solution: a material throwing device for use in unmanned aerial vehicles (UAVs) is proposed, comprising: a casing;

[0009] The rotating body is movably located at the center of the housing. Several storage compartments are formed inside the rotating body, and each storage compartment is provided with an opening and closing plate. The opening and closing plate is used to open or close the storage compartment.

[0010] The receiving mechanism is detachably connected to the top wall of the housing. The relative position of the receiving mechanism to the housing can be adjusted to adapt to the assembly and disassembly of external drones.

[0011] A drive mechanism is located inside the housing. The drive mechanism includes an active component and a driven component distributed on both sides of the rotating body. Both the active component and the driven component are movably engaged with the rotating body to drive the rotating body to rotate and align the corresponding storage compartment with the opening end of the receiving cavity, so that the material can fall accurately.

[0012] In the aforementioned material delivery device for use with drones, the active component includes a drive motor and a drive gear. The output shaft of the drive motor is connected to the drive gear, and the drive gear is movably engaged with the outer wall of the rotating body.

[0013] In the aforementioned material delivery device for drones, each of the storage compartments has a connecting pin and a locking groove at both ends of its opening. The opening and closing plate has a locking block at its end. The opening and closing plate is movably connected to the rotating body via the connecting pin, so that the locking block can be movably locked into the locking groove.

[0014] In the aforementioned material delivery device for drones, the driven component includes a driven gear and a fixed shaft. The fixed shaft is installed on the inner wall of the receiving cavity, and the driven gear is connected to the fixed shaft. The outer walls of the rotating body and the opening and closing plate together form an annular tooth, and both the driving gear and the driven gear are movably meshed with the annular tooth.

[0015] In the aforementioned material delivery device for drones, the receiving mechanism includes a fixed base and an adjusting plate. The fixed base is connected to the top wall of the casing, the top wall of the adjusting plate is connected to the drone, and the bottom wall is movably connected within the fixed base.

[0016] In the aforementioned material delivery device for drones, the bottom wall of the adjusting plate is formed with a horizontal dovetail block and a vertical dovetail block, and the fixed base is formed with interconnected dovetail grooves and locking holes. The horizontal dovetail block or the vertical dovetail block is movably engaged in the dovetail groove, and the adjusting plate is restricted from moving relative to the fixed base by the locking pin in the locking hole.

[0017] In the aforementioned material delivery device for use with drones, a circuit board protective sleeve is also provided inside the casing. A stop block is formed on the circuit board protective sleeve, and the stop block is used to prevent the wire harnesses connected to the circuit board from getting tangled together.

[0018] In the aforementioned material delivery device for use with drones, the drive mechanism further includes a visual detector and an infrared detector.

[0019] In the aforementioned material delivery device for drones, each of the storage compartments has a limiting groove formed on its inner wall, and the opening of the limiting groove is correspondingly set with the opening and closing plate.

[0020] In the aforementioned material delivery device for unmanned aerial vehicles, the housing includes a main housing and a cover plate. The main housing and the cover plate are detachably connected and together form a receiving cavity. The driving gear and the driven gear are both located within the receiving cavity. An annular baffle is formed within the main housing. A connecting slot and a feeding port are formed on the annular baffle. The rotating body is movably located within the annular baffle. The driving gear and the driven gear pass through the connecting slot and mesh with the rotating body, so that several storage compartments can be turned to the feeding port.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This utility model provides a material delivery device for drones. It integrates multiple independent storage compartments through an integrated rotating main body, combines a double gear meshing transmission system to precisely control the rotation angle, and is equipped with a detachable quick-change receiving mechanism to adapt to different models of drones, so as to realize lightweight, high-precision, multi-category, and rapid response emergency material delivery to multiple points continuously and accurately.

[0023] (2) By setting an annular tooth on the outer wall of the rotating body and the opening and closing plate, and driving it by the meshing of the driving gear and the driven gear on both sides, a symmetrical force structure is formed, which effectively disperses the single tooth, reduces tooth surface wear and deformation, and reduces transmission impact and vibration. It is especially suitable for scenarios with high requirements for speed and torque stability, significantly improves the stability and anti-eccentric load capacity of the rotating body during rotation, and prevents shaking or jamming caused by unilateral drive.

[0024] (3) By setting up a circuit board protective sleeve with a stop block, not only is physical protection provided for the internal electronic control module to prevent collision, dust and moisture corrosion, but the stop block also orderly separates and limits the connecting wire harness, effectively avoiding the risk of the wire harness getting tangled, worn or short-circuited in a vibration environment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application;

[0026] Figure 2 This is a schematic diagram of the installation structure of the driving and driven components within the receiving cavity;

[0027] Figure 3 This is a schematic diagram of the installation structure of the housing and the supporting mechanism;

[0028] Figure 4 This is a schematic diagram of the rotating main body;

[0029] Figure 5 This is an exploded view of the area between the fixed base and the adjusting plate.

[0030] In the diagram, 1 is the housing; 10 is the circuit board protective sleeve; 100 is the stop block; 11 is the main housing; 110 is the annular baffle; 111 is the connecting slot; 112 is the feeding port; 12 is the cover plate; and 130 is the receiving cavity.

[0031] 2. Rotating main body; 20. Storage compartment; 200. Engaging groove; 201. Limiting groove; 21. Opening and closing plate; 210. Engaging block; 22. Ring tooth;

[0032] 3. Receiving mechanism; 30. Fixed seat; 300. Dovetail groove; 301. Locking hole; 31. Adjusting plate; 310. Transverse dovetail block; 311. Longitudinal dovetail block;

[0033] 4. Drive mechanism; 40. Driving component; 400. Drive motor; 400a. Output shaft; 401. Driving gear; 41. Driven component; 410. Driven gear; 42. Vision detector; 43. Infrared detector. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] like Figures 1 to 5 As shown, this utility model discloses a material throwing device for unmanned aerial vehicles, comprising a housing 1, a rotating body 2, a receiving mechanism 3, and a driving mechanism 4.

[0037] The rotating body 2 is movably located at the center of the housing 1. Several storage compartments 20 are formed inside the rotating body 2, and each storage compartment 20 is provided with an opening and closing plate 21. The opening and closing plate 21 is used to open or close the storage compartment 20. The receiving mechanism 3 is detachably connected to the top wall of the housing 1. The receiving mechanism 3 can be adjusted relative to the housing 1 to adapt to the disassembly and assembly of external drones. The driving mechanism 4 is located inside the housing 1. The driving mechanism 4 includes an active component 40 and a driven component 41 distributed on both sides of the rotating body 2. The active component 40 and the driven component 41 are movably engaged with the rotating body 2 to drive the rotating body 2 to rotate and align the corresponding storage compartment 20 with the opening end of the receiving cavity 130, so that the material can fall accurately.

[0038] In this embodiment, five storage compartments 20 are provided, spaced 72 degrees apart on the rotating body 2. This means that every 72° rotation of the rotating body 2 ensures the precise dropping of materials from the corresponding storage compartment 20, enabling precise delivery of multiple batches of materials in a staggered sequence. This solves the problem of continuous delivery that traditional single-compartment throwing devices cannot achieve. Specifically, as shown... Figures 1 to 5 As shown, operators load different emergency supplies (such as first aid kits, lifebuoys, drinking water, lighting, megaphones, etc.) into the five storage compartments 20 within the rotating body 2 according to the needs of the rescue mission, and close the corresponding opening and closing plates 21 of each compartment. Subsequently, by adjusting the position of the receiving mechanism 3 relative to the housing 1, it is ensured that the receiving mechanism 3 can quickly adapt to the loading of external drones, thereby realizing the loading operation of drones of various specifications and types, improving the versatility and rapid deployment capability of the device, and making it particularly suitable for unmanned material delivery tasks in complex scenarios such as emergency rescue and mountain delivery. After the wireless output module sends a signal, the active component 40 can rotate within the housing 1, thereby driving the rotating body 2 to rotate the predetermined storage compartment 20 to the feeding position (i.e., Figure 1 (Directly below the state shown) In this process, this embodiment adopts a transmission method in which the active component 40 and the driven component 41 simultaneously mesh with the double-sided gears of the rotating body 2, forming a symmetrical force structure, effectively dispersing the transmission load, reducing gear wear and operating vibration, significantly improving transmission stability and rotational positioning accuracy. Combined with precise step control every 72°, it ensures that the target compartment is accurately aligned with the delivery port, keeping the material landing point error within ±0.5 meters, meeting the precise delivery requirements in complex environments. Therefore, this embodiment integrates multiple independent storage compartments 20 through the integrated rotating body 2, combines a double-gear meshing transmission system to precisely control the rotation angle, and is equipped with a detachable quick-change receiving mechanism 3 to adapt to different models of UAVs, realizing lightweight, high-precision, multi-category, and rapid-response multi-point continuous precise delivery of emergency materials.

[0039] Each storage compartment 20 has a connecting pin and a locking groove 200 at both ends of its opening. The opening and closing plate 21 has a locking block 210 at its end. The opening and closing plate 21 is movably connected to the rotating body 2 by the connecting pin, so that the locking block 210 can be movably locked in the locking groove 200.

[0040] like Figure 4 As shown in the figure, each of the five storage compartments 20 in this embodiment is equipped with a corresponding opening and closing plate 21 (only one is shown in the figure). The opening and closing plate 21 is connected by a connecting pin and a locking block 210-locking groove 200, which realizes the rotatable connection and reliable locking of the opening and closing plate 21 on the storage compartment 20. In the non-dispatch state, the opening and closing plate 21 firmly closes the storage compartment 20 to prevent materials from falling accidentally due to vibration or bumps. When dispatch is required, the opening and closing plate 21 rotates relative to the rotating body 2 due to its own weight (that is, the opening and closing plate 21 only rotates when the material needs to be discharged). Figure 1 (It can only be opened at the position directly below the indicated point), thereby enabling the opening of the cabin. This structure is simple, reliable, and sensitive, effectively ensuring safety during flight and the timeliness of delivery actions.

[0041] The driving component 40 includes a drive motor 400 and a drive gear 401. The output shaft 400a of the drive motor 400 is connected to the drive gear 401, and the drive gear 401 is movably engaged with the outer wall of the rotating body 2.

[0042] like Figure 1 and Figure 2 As shown, after the wireless output module (not shown in the figure) sends a signal and receives it, the drive motor 400 drives the drive gear 401 to rotate, thereby completing the rotation of the main body 2 along the path. Figure 1 Precise clockwise angle control and automated drive avoid manual intervention or complex pneumatic / hydraulic system layout, reducing system power consumption and failure rate. Furthermore, the drive gear 401 in this embodiment meshes with the outer wall of the rotating body 2, resulting in a compact structure and high transmission efficiency. This ensures stable operation during UAV flight, guaranteeing that each storage compartment 20 is accurately aligned with the feeding port 112 in a preset sequence, thus improving the reliability and controllability of the feeding operation.

[0043] The driven member 41 includes a driven gear 410 and a fixed shaft. The fixed shaft is installed on the inner wall of the receiving cavity 130. The driven gear 410 is connected to the fixed shaft. The outer walls of the rotating body 2 and the opening and closing plate 21 together form an annular tooth 22. The driving gear 401 and the driven gear 410 are both movably meshed with the annular tooth 22.

[0044] like Figure 2 As shown, by jointly setting an annular gear 22 on the outer wall of the rotating body 2 and the opening and closing plate 21, and driving it with double-sided meshing of the driving gear 401 and the driven gear 410, a symmetrical force structure is formed, which effectively disperses the single-tooth wear, reduces tooth surface wear and deformation, and reduces transmission impact and vibration. It is especially suitable for scenarios with high requirements for speed and torque stability, significantly improving the stability and anti-eccentric load capacity of the rotating body 2 during rotation, and preventing shaking or jamming caused by single-sided drive. During the process of the drive motor 400 driving the driving gear 401 to rotate, the rotation of the rotating body 2 can be synchronously driven by the annular gear 22 to drive the driven gear 410 to rotate. That is to say, the driven gear 410 is supported by a fixed shaft, which enhances the rigidity of the overall transmission system and extends its service life. This double-gear meshing design is particularly suitable for the working conditions of UAVs with airflow disturbances during high-altitude flight, ensuring the smoothness and precision of the rotation.

[0045] The receiving mechanism 3 includes a fixed base 30 and an adjusting plate 31. The fixed base 30 is connected to the top wall of the housing 1. The top wall of the adjusting plate 31 is connected to the UAV, and the bottom wall is movably connected inside the fixed base 30.

[0046] like Figure 3 and Figure 5 As shown, the receiving mechanism 3 in this embodiment adopts a combination structure of fixed base 30 and adjusting plate 31, which allows the entire throwing device to be adjusted in position between the adjusting plate 31 and the fixed base 30, thereby adapting to drone mounting platforms of different sizes or interface types. This structure improves the versatility and compatibility of the device, eliminates the need to customize the installation structure for each type of drone, reduces the cost of use and maintenance difficulty, facilitates rapid replacement and deployment in multi-model missions, and enhances the practical application value of the equipment.

[0047] The bottom wall of the adjusting plate 31 has a horizontal dovetail block 310 and a vertical dovetail block 311. The fixed base 30 has a dovetail groove 300 and a locking hole 301 that are interconnected. The horizontal dovetail block 310 or the vertical dovetail block 311 is movably engaged in the dovetail groove 300 and the adjusting plate 31 is restricted from moving relative to the fixed base 30 by the locking pin in the locking hole 301.

[0048] like Figure 3 and Figure 5 As shown, the connection between the adjustment plate 31 and the fixed seat 30 in this embodiment is mainly achieved through the cooperation structure of the horizontal / vertical dovetail block 311 and the dovetail groove 300. Specifically, the dovetail blocks at different positions and angles on the adjustment plate 31 are movably engaged in the dovetail groove 300, thereby realizing the quick positioning connection between the adjustment plate 31 and the fixed seat 30. This structure has good guiding properties and shear resistance, and can achieve precise horizontal or vertical sliding positioning during the adjustment process, preventing the adjustment plate 31 from loosening or misaligning during flight. After the relative position between the adjustment plate 31 and the fixed seat 30 is determined, the operator can pass the locking pin through the locking hole 301 and connect it to the horizontal / vertical dovetail block 311 to form a locking mechanism, ensuring the overall structure of the device is stable and reliable. This mechanical adjustment and locking method does not require electric drive, is safe and reliable, and is suitable for the high vibration and strong impact flight environment of UAVs.

[0049] The casing 1 is also provided with a circuit board protective sleeve 10, and a stop block 100 is formed on the circuit board protective sleeve 10. The stop block 100 is used to prevent the wire harnesses connected to the circuit board from getting tangled together.

[0050] like Figure 2As shown, this embodiment, by setting a circuit board protective sleeve 10 with a stop block 100, not only provides physical protection for the internal electronic control modules (such as the drive motor 400 controller, sensor modules, etc.) against collisions, dust, and moisture corrosion, but also uses the stop block 100 to orderly separate and limit the connecting wire harnesses, effectively avoiding the risk of wire harnesses becoming entangled, worn, or short-circuited in a vibrating environment. This design improves the safety and long-term operational stability of the electrical system, reduces maintenance frequency, and enhances the device's adaptability to harsh environments.

[0051] The drive mechanism 4 also includes a visual detector 42 and an infrared detector 43. The introduction of these two devices enables the device to have environmental perception and target recognition capabilities, allowing it to monitor the terrain features, obstacle distribution, and target location of the delivery area in real time, and to make intelligent delivery decisions in conjunction with the flight control system. For example, in low visibility or nighttime operations, the infrared detector 43 can assist in locating the delivery point; the visual detector 42 can be used to confirm whether the delivery action has been completed or to determine whether the material has been successfully released. This intelligent upgrade significantly improves delivery accuracy and mission success rate, and expands the application scenarios of the device in complex environments.

[0052] Preferably, such as Figure 4 As shown, each storage compartment 20 has a limiting groove 201 formed on its inner wall. The opening of the limiting groove 201 is correspondingly set with the opening and closing plate 21. The limiting groove 201 plays a certain limiting function for the material in the discharge compartment to prevent vibration or displacement. The opening of the limiting groove 201 is aligned with the opening and closing plate 21. The main purpose is that when the opening and closing plate 21 opens due to its own gravity, the limiting groove 201 will not constrain the position of the material falling. This ensures that the material can fall smoothly and accurately from the storage compartment 20 the moment the opening and closing plate 21 opens automatically, thus ensuring the continuity and reliability of multiple delivery tasks.

[0053] The housing 1 includes a main housing 11 and a cover plate 12. The main housing 11 and the cover plate 12 are detachably connected and together form a receiving cavity 130. The driving gear 401 and the driven gear 410 are both located in the receiving cavity 130. An annular baffle 110 is formed in the main housing 11. A connecting slot 111 and a feeding port 112 are formed on the annular baffle 110. The rotating body 2 is movably located in the annular baffle 110. The driving gear 401 and the driven gear 410 pass through the connecting slot 111 and mesh with the rotating body 2, so that several storage compartments 20 can be turned to the feeding port 112.

[0054] like Figure 2 and Figure 3As shown, the detachable connection (screws or bolts) between the main housing 11 and the cover plate 12 facilitates the installation, inspection, and maintenance of internal components (such as the drive mechanism 4, the rotating body 2, and the circuit system), improving the maintainability and modularity of the device. Furthermore, the annular baffle 110 not only provides a stable rotational support space for the rotating body 2 but also allows for gear meshing transmission through the connecting slot 111, while guiding the material to fall in a specific direction through the feeding port 112, preventing material jamming or deviation during the feeding process. The overall structural layout is reasonable, with high space utilization, combining protection and functionality, which is conducive to achieving miniaturization and lightweight design, meeting the stringent requirements of UAVs for payload and size.

[0055] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A material delivery device for use with unmanned aerial vehicles (UAVs), characterized in that, include: chassis; The rotating body is movably located at the center of the housing. Several storage compartments are formed inside the rotating body, and each storage compartment is provided with an opening and closing plate. The opening and closing plate is used to open or close the storage compartment. The receiving mechanism is detachably connected to the top wall of the housing. The relative position of the receiving mechanism to the housing can be adjusted to adapt to the assembly and disassembly of external drones. A drive mechanism is located inside the housing. The drive mechanism includes an active component and a driven component distributed on both sides of the rotating body. Both the active component and the driven component are movably engaged with the rotating body to drive the rotating body to rotate and align the corresponding storage compartment with the opening end of the receiving cavity, so that the material can fall accurately.

2. The material delivery device for unmanned aerial vehicles (UAVs) according to claim 1, characterized in that, The driving component includes a drive motor and a drive gear. The output shaft of the drive motor is connected to the drive gear, and the drive gear is movably engaged with the outer wall of the rotating body.

3. A material delivery device for use with unmanned aerial vehicles according to claim 1, characterized in that, Each of the storage compartments has a connecting pin and a locking groove at both ends of its opening. The opening and closing plate has a locking block at its end. The opening and closing plate is movably connected to the rotating body through the connecting pin, so that the locking block can be movably locked into the locking groove.

4. A material delivery device for use with a drone according to claim 2, characterized in that, The driven component includes a driven gear and a fixed shaft. The fixed shaft is installed on the inner wall of the receiving cavity. The driven gear is connected to the fixed shaft. The outer walls of the rotating body and the opening and closing plate together form an annular tooth. Both the driving gear and the driven gear are movably meshed with the annular tooth.

5. A material delivery device for use with a drone according to claim 1, characterized in that, The receiving mechanism includes a fixed base and an adjusting plate. The fixed base is connected to the top wall of the housing, the top wall of the adjusting plate is connected to the UAV, and the bottom wall is movably connected to the fixed base.

6. A material delivery device for use with a drone according to claim 5, characterized in that, The bottom wall of the adjusting plate has a horizontal dovetail block and a vertical dovetail block. The fixed seat has interconnected dovetail grooves and locking holes. The horizontal dovetail block or the vertical dovetail block is movably engaged in the dovetail groove, and the adjusting plate is restricted from moving relative to the fixed seat by the locking pin in the locking hole.

7. A material delivery device for use with a drone according to claim 1, characterized in that, The casing also includes a circuit board protective sleeve with a stop block formed on it. The stop block is used to prevent the wire harnesses connected to the circuit board from getting tangled together.

8. A material delivery device for use in unmanned aerial vehicles according to claim 1, characterized in that, The drive mechanism also includes a visual detector and an infrared detector.

9. A material delivery device for use in unmanned aerial vehicles according to claim 3, characterized in that, Each of the storage compartments has a limiting groove formed on its inner wall, and the opening of the limiting groove is correspondingly set to the opening and closing plate.

10. A material delivery device for use with a drone according to claim 4, characterized in that, The housing includes a main housing and a cover plate. The main housing and the cover plate are detachably connected and together form a receiving cavity. The driving gear and the driven gear are both located in the receiving cavity. An annular baffle is formed in the main housing. A connecting slot and a feeding port are formed on the annular baffle. The rotating body is movably located in the annular baffle. The driving gear and the driven gear pass through the connecting slot and mesh with the rotating body, so that several storage compartments can be turned to the feeding port.

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