A propeller rod folding and connecting mechanism for plant protection unmanned aerial vehicles

Abstract

The utility model discloses a kind of propeller rod folding connection mechanisms for plant protection unmanned aerial vehicle, it is related to unmanned aerial vehicle technical field, including take-off support, the top surface of take-off support is provided with main unit, the side of main unit is provided with folding arm unit, main unit includes unmanned aerial vehicle main body fixedly connected in the top surface of take-off support, fixed frame for connecting effect in the side of unmanned aerial vehicle main body, water tank for storing liquid is set in the bottom surface of unmanned aerial vehicle main body;The utility model is through four host arms arranged at ninety degrees angle, in unfolded state, be fixed in the inside of fixed frame by the threaded rod inside of limiting frame through positioning hole, while fixed screw rod can be screw connected in the inside of one limiting threaded hole, ensure that host arm has enough stability in the process of operation, motor inside setting of propeller rod drives folding blade to unfold, and under the continuous effect of motor, drive main unit to rise to high altitude and complete plant protection operation.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a folding connection mechanism for a propeller rod of an agricultural protection UAV. Background Technology

[0002] Agricultural drones are professional-grade drones designed specifically for agricultural field operations. Essentially, they are "agricultural production tools that replace manual labor," not entertainment devices. Their core functions are to efficiently complete agricultural tasks such as pesticide spraying, seed sowing, foliar fertilizer application, and farmland inspection. Their core features revolve around "operational efficiency" and "adaptability to the field environment." Agricultural operations often require moving between multiple plots. Non-foldable drones require multiple people to carry them, which is not only laborious but also prone to collision damage due to exposed arms and propellers. Therefore, a foldable arm design is needed to facilitate transport. Referencing patent number CN221738142U, the design involves loosening the locking nut from the outside of the fixing bolt. The connecting arm body is then rotated upwards within the internal adjustment groove, centered on the fixing bolt. This allows the four connecting arm bodies, drive components, and propellers to fold and retract towards the top of the drone body, reducing the space occupied by the connecting arm bodies and drive components, and facilitating the folding of the drone's propeller assembly.

[0003] To illustrate this point, consider the transportation method of agricultural drones: Traditional four-arm agricultural drones, even after folding, still have their arms protruding outwards from the fuselage. Their overall size usually exceeds the carrying capacity of ordinary transport vehicles, requiring specialized transport equipment. To address this issue, we provide a propeller folding connection mechanism for agricultural drones to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a folding connection mechanism for the propeller rod of an agricultural drone to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A plant protection drone propeller folding connection mechanism includes a landing bracket, a main body unit is provided on the top surface of the landing bracket, and a folding arm unit is provided on the side of the main body unit;

[0007] The main unit includes a drone body fixedly connected to the top surface of the landing gear, a fixed frame fixedly connected to the side of the drone body for connection, and a water tank set on the bottom surface of the drone body for storing liquid.

[0008] The folding arm unit includes a main arm movably connected inside the fixed frame and a foldable propeller rod movably connected inside the side of the main arm.

[0009] A further improvement of this utility model is that: four folding compartments are provided inside the side of the main body of the drone; a limit frame is fixedly connected to the side of the fixing frame; and a fixing screw is threadedly connected to the other side of the fixing frame.

[0010] A further improvement of this utility model is that a camera is fixedly connected to the top side of the drone body, and a connecting bracket is fixedly connected to the bottom surface of the drone body.

[0011] A further improvement of this utility model is that: a locking block is fixedly connected to the top surface of the water tank, the locking block is engaged inside the connecting bracket, and a water outlet is fixedly connected to the bottom surface of the water tank.

[0012] A further improvement of the present invention is that: a positioning hole is provided inside the top surface of the main arm, a folding groove is provided inside the side surface of the main arm, a limiting screw is threadedly connected inside the top surface of the main arm, and a limiting threaded hole is provided inside the back surface of the main arm.

[0013] A further improvement of this utility model is that a motor is fixedly connected to one end of the top surface of the propeller rod, and a folding blade is fixedly connected to the output end of the motor.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] 1. This utility model provides a folding connection mechanism for the propeller rod of an agricultural drone. The main unit can reach a designated position in the air under the drive of the folding arm unit, and spraying operation can be carried out on the required position through the cooperation of the water outlet and the external nozzle. After the operation is completed, the main unit stays on the ground under the support of the landing bracket. At this time, the water tank does not directly contact the ground, avoiding damage to the water tank caused by the impact of landing.

[0016] When transporting the equipment, the folding arm unit can be folded inside the folding compartment, and the folding arm unit body can be folded as well. At this time, the equipment occupies less space and is more regular in shape, making it easier to transport.

[0017] 2. This utility model provides a folding connection mechanism for propeller rods of agricultural drones. In the unfolded state, four main arms set at a 90-degree angle are fixed inside the fixed frame by threaded rods inside the limiting frame passing through positioning holes. At the same time, the fixing screws can be threaded into the inside of a limiting threaded hole to ensure sufficient stability of the main arms during operation. The motor inside the propeller rod drives the folding blades to unfold, and under the continuous action of the motor, it drives the main unit to rise to a high altitude to complete the agricultural operation.

[0018] After the operation is completed, the threaded rod and fixing screw inside the limit frame can be removed, the propeller rod can be folded inside the folding slot and fixed with another limit screw, and the folded main arm can be stored inside the folding compartment for easy transportation of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the main unit of this utility model;

[0021] Figure 3 This is a schematic diagram of the component structure of the main unit of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the folding arm unit of this utility model;

[0023] Figure 5 This is a schematic diagram of the component structure of the folding arm unit of this utility model;

[0024] Figure 6 This is a schematic diagram of the folding structure of this utility model.

[0025] In the diagram: 1. Landing support; 2. Main unit; 21. UAV main body; 22. Folding compartment; 23. Fixing frame; 24. Limiting frame; 25. Fixing screw; 26. Camera; 27. Connecting bracket; 28. Locking block; 29. ​​Water tank; 210. Water outlet; 3. Folding arm unit; 31. Main arm; 32. Folding groove; 33. Limiting screw; 34. Positioning hole; 35. Propeller rod; 36. Motor; 37. Folding blade; 38. Limiting threaded hole. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to embodiments:

[0027] Example 1: As Figure 1-6 As shown, this utility model provides a folding connection mechanism for the propeller rod of an agricultural drone, including a landing support 1, a main body unit 2 on the top surface of the landing support 1, a folding arm unit 3 on the side of the main body unit 2, the main body unit 2 including a drone body 21 fixedly connected to the top surface of the landing support 1, a fixing frame 23 fixedly connected to the side of the drone body 21 for connecting, and a water tank 29 set on the bottom surface of the drone body 21 for storing liquid. Four folding compartments 22 are opened inside the side of the drone body 21. A limit frame 24 is fixedly connected to the side of the fixing frame 23, and a fixing screw 25 is threadedly connected to the other side of the fixing frame 23.

[0028] The landing gear 1 is fixedly connected to both ends of the bottom surface of the drone body 21. The folding compartment 22 is opened on the side of the drone body 21, and there are four of them. They are opened inside the four sides of the drone body 21. The overall shape of the drone body 21 is similar to a cube. The four corners are equipped with fixing frames 23. The openings of the fixing frames 23 are connected to the folding compartment 22.

[0029] A camera 26 is fixedly connected to the top side of the drone body 21, a connecting bracket 27 is fixedly connected to the bottom surface of the drone body 21, a locking block 28 is fixedly connected to the top surface of the water tank 29, the locking block 28 is locked inside the connecting bracket 27, and a water outlet 210 is fixedly connected to the bottom surface of the water tank 29.

[0030] The side of the connecting bracket 27 has an opening, and the locking block 28 can be locked inside the connecting bracket 27. The locking block 28 and the connecting bracket 27 are locked together by bolts. The water tank 29 can be used to store the liquid required for plant protection. The water outlet 210 can transfer the liquid inside the water tank 29 to the external nozzle.

[0031] In this embodiment, the main body unit 2 can reach a designated position in the air under the drive of the folding arm unit 3, and spray the required position through the cooperation of the water outlet 210 and the external nozzle. After the operation is completed, the main body unit 2 stays on the ground under the support of the landing bracket 1. At this time, the water tank 29 does not directly contact the ground, so as to avoid the impact force of the landing from damaging the water tank 29.

[0032] When transporting the equipment, the folding arm unit 3 can be folded inside the folding compartment 22, and the main body of the folding arm unit 3 can be folded. At this time, the equipment occupies less space and is more regular, making it easier to transport.

[0033] Example 2: As Figure 1-6 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the folding arm unit 3 includes a main arm 31 movably connected inside the fixed frame 23 and a foldable propeller rod 35 movably connected inside the side of the main arm 31. The top surface of the main arm 31 is provided with a positioning hole 34, the side of the main arm 31 is provided with a folding groove 32, the top surface of the main arm 31 is threadedly connected with a limiting screw 33, the back of the main arm 31 is provided with a limiting threaded hole 38, and a motor 36 is fixedly connected inside the top surface of the propeller rod 35. The output end of the motor 36 is fixedly connected with a folding blade 37.

[0034] There are four main arms 31, which are respectively set inside the four fixing frames 23. The top surface of the limiting frame 24 is provided with a detachable screw and can move inside the positioning hole 34. There are two limiting threaded holes 38 on the side of the main arm 31, which are oriented in different directions and used for fixing in different states.

[0035] The propeller rod 35 can be folded at a 150-degree angle inside the folding slot 32. Two limiting screws 33 set inside the top surface of the main arm 31 can fix the propeller rod 35 in the unfolded or folded state. The folding blade 37 consists of four blades and can be folded together and thrown apart by the centrifugal force of the motor 36.

[0036] In this embodiment, the four main arms 31, which are set at a 90-degree angle, are fixed inside the fixed frame 23 by the threaded rods inside the limiting frame 24 passing through the positioning holes 34 when they are in the unfolded state. At the same time, the fixing screws 25 can be threaded into the inside of a limiting threaded hole 38 to ensure that the main arms 31 have sufficient stability during operation. The motor 36 set inside the propeller rod 35 drives the folding blades 37 to unfold, and under the continuous action of the motor 36, the main body unit 2 is driven to rise to the sky to complete the plant protection operation.

[0037] After the operation is completed, the threaded rod and fixing screw 25 inside the limiting frame 24 can be removed, and the propeller rod 35 can be folded inside the folding slot 32 and fixed with another limiting screw 33. The folded main arm 31 can be stored inside the folding compartment 22 for easy transportation of the device.

[0038] The working principle of the propeller shaft folding connection mechanism of this agricultural drone will be explained in detail below.

[0039] like Figure 1-6 As shown, the main arm 31, which is set at a 90-degree angle, is fixed inside the fixed frame 23 by the threaded rod inside the limiting frame 24 passing through the positioning hole 34 in the unfolded state. At the same time, the fixing screw 25 can be threaded into the inside of a limiting threaded hole 38 to ensure that the main arm 31 has sufficient stability during operation. The motor 36 installed inside the propeller rod 35 drives the folding blade 37 to unfold. Under the continuous action of the motor 36, the main unit 2 can reach the designated position in the air. Through the cooperation of the water outlet 210 and the external nozzle, the desired position can be sprayed. After the operation is completed, the main unit 2 stays on the ground with the support of the landing bracket 1. At this time, the water tank 29 does not directly contact the ground to avoid damage to the water tank 29 caused by the impact of landing.

[0040] When transporting the equipment, the threaded rod and fixing screw 25 inside the limiting frame 24 can be removed, and the propeller rod 35 can be folded inside the folding slot 32 and fixed with another limiting screw 33. The folded main arm 31 can be stored inside the folding compartment 22, which facilitates the transport of the device. At this time, the equipment occupies less space and is more regular, making it easier to transport.

[0041] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all modifications or improvements made without departing from the spirit and concept of the present invention are within the protection scope of the present invention.

Claims

1. A propeller folding connection mechanism for an agricultural protection drone, comprising a landing gear (1), characterized in that: The top surface of the landing support (1) is provided with a main body unit (2), and the side of the main body unit (2) is provided with a folding arm unit (3); The main unit (2) includes a drone body (21) fixedly connected to the top surface of the landing support (1), a fixed frame (23) fixedly connected to the side of the drone body (21) for connecting, and a water tank (29) set on the bottom surface of the drone body (21) for storing liquid; The folding arm unit (3) includes a main arm (31) movably connected inside the fixed frame (23) and a foldable propeller rod (35) movably connected inside the side of the main arm (31).

2. The propeller rod folding connection mechanism for a plant protection drone according to claim 1, characterized in that: The main body (21) of the drone has four folding compartments (22) inside its side. The side of the fixed frame (23) is fixedly connected to a limit frame (24), and the other side of the fixed frame (23) is threaded with a fixing screw (25).

3. The propeller rod folding connection mechanism for a plant protection drone according to claim 2, characterized in that: A camera (26) is fixedly connected to the top side of the drone body (21), and a connecting bracket (27) is fixedly connected to the bottom surface of the drone body (21).

4. The propeller shaft folding connection mechanism for a plant protection drone according to claim 3, characterized in that: The top surface of the water tank (29) is fixedly connected to a locking block (28), which is engaged inside the connecting bracket (27). The bottom surface of the water tank (29) is fixedly connected to a water outlet (210).

5. The propeller rod folding connection mechanism for a plant protection drone according to claim 4, characterized in that: The main arm (31) has a positioning hole (34) inside the top surface, a folding groove (32) inside the side surface, a limiting screw (33) threadedly connected inside the top surface, and a limiting threaded hole (38) inside the back surface.

6. The propeller rod folding connection mechanism for a plant protection drone according to claim 5, characterized in that: A motor (36) is fixedly connected to one end of the top surface of the propeller shaft (35), and a folding blade (37) is fixedly connected to the output end of the motor (36).

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