A heavy-load multi-rotor drone

Abstract

This application discloses a heavy-load multi-rotor unmanned aerial vehicle (UAV), belonging to the field of UAVs. The UAV includes a main body, multiple cantilever arms fixedly connected to the outside of the main body, rotors connected to the cantilever arms, and a connecting mechanism for fixing the rotors to the cantilever arms. The connecting mechanism includes an axially movable sleeve on the cantilever arm, an opening on the outside of the sleeve, a mounting plate fixedly connected to the sleeve on the side away from the opening for connecting to the rotors, and a fixing member disposed on the sleeve at a position corresponding to the outer side of the opening. Utilizing the design of the connecting mechanism, the axial position of the rotors on the cantilever arms can be adjusted, allowing the UAV to flexibly adjust the rotor position according to different load weights, flight missions, and flight environments, thereby optimizing the stress distribution of the UAV and improving flight stability and heavy-load capacity.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) technology, specifically a heavy-duty multi-rotor UAV. Background Technology

[0002] In numerous fields such as modern logistics and transportation, emergency rescue, and industrial inspection, heavy-duty multi-rotor drones are playing an increasingly important role due to their unique advantages. These drones are multi-rotor aircraft specifically designed to carry heavy payloads. Compared to ordinary multi-rotor drones, they possess a more powerful power system and a more robust structure, enabling them to safely carry heavier goods, equipment, or sensors. This allows for the rapid and efficient transportation of goods in remote areas with poor transportation, complex terrain environments, and emergencies such as earthquakes and floods, providing strong support for material resupply and emergency rescue operations.

[0003] To achieve outstanding heavy-load capabilities, heavy-load multi-rotor drones face stringent requirements in design and manufacturing. They typically require high-performance motors, propellers, and batteries to provide ample power; simultaneously, an advanced flight control system is essential to ensure the drone's stability and safety when carrying heavy loads. Furthermore, the design process must fully consider factors such as structural strength and weight distribution, optimizing the structural design to improve the drone's load-bearing capacity and overall flight performance, enabling it to adapt to flight requirements under varying load conditions.

[0004] However, there are still some areas for improvement in existing heavy-load multi-rotor UAV technology. One prominent issue is the rotor mounting structure. Currently, the rotor base is typically fixed to the end of the cantilever furthest from the fuselage, and the cantilever and rotor base are integrally molded. This design prevents the rotor's position on the cantilever from being adjusted according to actual load conditions and flight environment, thus limiting further improvements in the UAV's heavy-load capacity and optimization of flight performance.

[0005] Therefore, this application provides a heavy-duty multi-rotor unmanned aerial vehicle (UAV) to solve the above-mentioned problems. Utility Model Content

[0006] This application provides a heavy-load multi-rotor drone, which aims to solve the problems mentioned in the background art, such as the fact that the rotor base and cantilever are integrally formed and the rotor position is fixed, which makes it impossible to adjust according to the actual load and flight environment, thus limiting the improvement of heavy-load capacity and optimization of flight performance.

[0007] To achieve the above objectives, this application provides the following technical solution: a heavy-duty multi-rotor unmanned aerial vehicle (UAV), comprising a UAV body, multiple cantilever arms fixedly connected to the outside of the UAV body, rotors connected to the cantilever arms, and a connecting mechanism for fixing the rotors to the cantilever arms; to facilitate adjustment of the rotor position: the connecting mechanism includes a sleeve axially movable on the cantilever arm, an opening on the outside of the sleeve, a mounting plate fixedly connected to the side of the sleeve away from the opening for connecting to the rotor, and a fixing member disposed on the sleeve at a position corresponding to the outside of the opening. The sleeve in the connecting mechanism can move axially on the cantilever arm. When the rotor position needs to be adjusted, the opening size is changed by tightening or loosening the fixing member, allowing the sleeve to slide on the cantilever arm. After adjustment to a suitable position, the fixing member is tightened, and the force of the fixing member fixes the sleeve to the cantilever arm, thereby fixing the rotor position.

[0008] Preferably, the length of the mounting plate is longer than the length of the sleeve. This increases the distance between the rotor and the sleeve, preventing the sleeve from interfering with the rotor's rotation, and also provides sufficient space for the installation of the servo, ensuring the normal operation of both the rotor and the servo.

[0009] Preferably, the fastener includes a first fixing plate and a second fixing plate, which are respectively fixedly connected to the sleeve at one end near the opening. The first fixing plate and the second fixing plate are connected by bolts and lock nuts. As important components of the fastener, the first fixing plate and the second fixing plate provide installation positions for the bolts and lock nuts. Their cooperation effectively transmits the fixing force, ensuring the tightening effect on the opening and thus guaranteeing the reliability of the sleeve's fixation. Furthermore, its structural design is simple, facilitating processing and installation.

[0010] Preferably, both the first fixing plate and the second fixing plate have multiple through holes along their length for bolts to pass through. The multiple through holes allow the bolts to be installed in different positions, thereby adjusting the connection tightness between the first and second fixing plates as needed, further improving the flexibility and reliability of sleeve fixing to adapt to different loads and flight conditions.

[0011] Preferably, to facilitate the connection between the rotor and the mounting plate: a servo motor is fixedly connected to the end of the mounting plate away from the sleeve; the output end of the servo motor is fixedly connected to the rotor shaft; and the servo motor is electrically connected to the UAV body via a wire. This achieves a convenient connection between the rotor and the mounting plate, while the servo motor can control the rotor's rotation angle, allowing the UAV to more flexibly adjust its flight attitude and direction, improving flight maneuverability and stability, and meeting the needs of different flight missions.

[0012] Preferably, to facilitate support for the drone body, the drone further includes two support legs symmetrically and fixedly connected to the bottom of the drone body. The two support legs have a figure-eight shape and consist of two struts fixedly connected to the drone body and a crossbar fixedly connected to the bottom of the two struts. The support legs effectively support the drone body, ensuring stability during takeoff and landing and preventing direct contact between the drone body and its bottom equipment and the ground, thus avoiding damage. The two figure-eight shaped support legs also distribute the drone's weight, improving stability.

[0013] Preferably, to ensure the stability of the two support legs: a reinforcing rod is fixedly connected between the two support rods, and two reinforcing rods are symmetrically fixedly connected between the two reinforcing rods. The reinforcing rod can enhance the connection strength between the two support rods, lock the included angle between them, and prevent the support rods from deforming or changing angle during support. The reinforcing rods further enhance the connection stability between the two support legs. Through the cooperation of the two, the overall structural strength and stability of the support legs are significantly improved, ensuring the safety and reliability of the UAV during takeoff, landing, and parking.

[0014] This application utilizes a connecting mechanism design to achieve axial position adjustment of the rotor on the cantilever, allowing the UAV to flexibly adjust the rotor position according to different load weights, flight missions, and flight environments, thereby optimizing the stress distribution of the UAV, improving flight stability and heavy load capacity. At the same time, the structure is simple and convenient to operate and can be quickly adjusted.

[0015] The support legs of this application provide effective support for the main body of the drone, enabling the drone to remain stable during takeoff and landing, and preventing the main body of the drone and the equipment on the bottom from being damaged by direct contact with the ground. The two support legs with an "eight" shape can distribute the weight of the drone and improve the stability of the support. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a heavy-duty multi-rotor unmanned aerial vehicle (UAV).

[0017] Figure 2 for Figure 1 The structural bottom view in the middle;

[0018] Figure 3 This is a schematic diagram of the connection mechanism and the rotor.

[0019] Figure 4 This is the main structural view of the supporting leg.

[0020] In the picture:

[0021] 1. UAV body; 2. Cantilever; 3. Rotor; 31. Servo motor; 4. Connecting mechanism; 41. Sleeve; 42. Opening; 43. Mounting plate; 44. Fixing component; 441. First fixing plate; 442. Second fixing plate; 443. Through hole; 5. Support leg; 51. Support rod; 52. Crossbar; 53. Reinforcing rod; 54. Strengthening rod. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Example 1

[0024] This embodiment provides a heavy-load multi-rotor unmanned aerial vehicle, such as Figure 1-4 As shown, the drone includes a main body 1, multiple cantilever arms 2 fixedly connected to the outside of the main body 1, rotors 3 connected to the cantilever arms 2, and a connecting mechanism 4 for fixing the rotors 3 to the cantilever arms 2. To facilitate adjustment of the rotor 3's position, the connecting mechanism 4 includes an axially movable sleeve 41 on the cantilever arms 2, an opening 42 on the outside of the sleeve 41, a mounting plate 43 fixedly connected to the sleeve 41 on the side away from the opening 42 for connecting to the rotor 3, and a fixing member 44 located on the sleeve 41 at the position corresponding to the outside of the opening 42. The design of the connecting mechanism 4 enables axial position adjustment of the rotors 3 on the cantilever arms 2, allowing the drone to flexibly adjust the rotor position according to different load weights, flight missions, and flight environments. This optimizes the stress distribution of the drone, improves flight stability and heavy-load capacity, and the structure is simple and convenient to operate, facilitating rapid adjustment. The sleeve 41 in the connecting mechanism 4 can move axially on the cantilever 2. When it is necessary to adjust the position of the rotor 3, the opening size of the opening 42 is changed by tightening or loosening the fixing member 44, so that the sleeve 41 can slide on the cantilever 2. After adjusting to the appropriate position, the fixing member 44 is tightened, and the sleeve 41 is fixed on the cantilever 2 by the force of the fixing member 44, thereby fixing the position of the rotor 3.

[0025] The mounting plate 43 is longer than the sleeve 41. This increases the distance between the rotor 3 and the sleeve 41, preventing the sleeve 41 from interfering with the rotation of the rotor 3. It also provides sufficient space for the installation of the servo motor 31, ensuring the normal operation of both the rotor 3 and the servo motor 31. The mounting plate 43 is fixedly connected to the side of the sleeve 41 away from the opening 42. Through its own structure, it connects the rotor 3 (via the servo motor 31) and the sleeve 41 into a whole. When the sleeve 41 moves on the cantilever 2, the mounting plate 43 moves with the sleeve 41, thereby driving the rotor 3 to move and adjusting the position of the rotor 3.

[0026] The fastener 44 includes a first fixing plate 441 and a second fixing plate 442. The first fixing plate 441 and the second fixing plate 442 are respectively fixedly connected to the end of the sleeve 41 near the opening 42. The first fixing plate 441 and the second fixing plate 442 are connected by bolts and lock nuts. As important components of the fastener 44, the first fixing plate 441 and the second fixing plate 442 provide the installation position for the connection of the bolts and lock nuts. Through their cooperation, the fixing force can be effectively transmitted to ensure the tightening effect on the opening 42, thereby ensuring the reliability of the sleeve 41. At the same time, its structural design is simple and easy to process and install. When the bolts and lock nuts are tightened, the first fixing plate 441 and the second fixing plate 442 move closer to each other, causing the opening 42 to open smaller, thereby fixing the sleeve 41 to the cantilever 2. When the bolts and lock nuts are loosened, the first fixing plate 441 and the second fixing plate 442 move further apart, the opening 42 opens larger, and the sleeve 41 can move on the cantilever 2.

[0027] Both the first fixing plate 441 and the second fixing plate 442 have multiple through holes 443 along their length for bolts to pass through. The multiple through holes 443 allow bolts to be installed in different positions, thus adjusting the connection tightness between the first fixing plate 441 and the second fixing plate 442 as needed. This further improves the flexibility and reliability of fixing the sleeve 41, adapting to different loads and flight conditions. The through holes 443 are located along the length of the first fixing plate 441 and the second fixing plate 442. After the bolt passes through the corresponding through hole 443, it engages with a lock nut. By selecting different positions of the through holes 443 for connection, the clamping force between the first fixing plate 441 and the second fixing plate 442 can be changed, thereby adjusting the opening size of the opening 42 and achieving the fixing or loosening of the sleeve 41.

[0028] To facilitate the connection between the rotor 3 and the mounting plate 43, a servo motor 31 is fixedly connected to the end of the mounting plate 43 away from the sleeve 41. The output end of the servo motor 31 is fixedly connected to the shaft of the rotor 3, and the servo motor 31 is electrically connected to the UAV body 1 via a wire. This achieves a convenient connection between the rotor 3 and the mounting plate 43. Simultaneously, the servo motor 31 can control the rotation angle of the rotor 3, allowing the UAV to more flexibly adjust its flight attitude and direction, improving flight maneuverability and stability to meet the needs of different flight missions. The UAV body 1 sends control signals to the servo motor 31, which drives the shaft of the rotor 3 to rotate according to the signals, thereby controlling the rotation angle of the rotor 3 and adjusting the UAV's flight attitude.

[0029] To facilitate support for the drone body 1, the drone also includes two support legs 5 symmetrically and fixedly connected to the bottom of the drone body 1. The two support legs 5 have a figure-eight shape and consist of two support rods 51 fixedly connected to the drone body 1 and a crossbar 52 fixedly connected to the bottom of the two support rods 51. This provides effective support for the drone body 1, ensuring stability during takeoff and landing and preventing damage from direct contact between the drone body 1 and its bottom equipment and the ground. The two figure-eight shaped support legs 5 also distribute the weight of the drone, improving stability. The support legs 5, symmetrically and fixedly connected to the bottom of the drone body 1, consist of two support rods 51 and a crossbar 52. The figure-eight shape provides a large support area. When the drone is placed, the support rods 51 and the crossbar 52 contact the ground, supporting the drone body 1 and maintaining a certain distance between the drone body 1 and the ground, ensuring stable placement.

[0030] To ensure the stability of the two support legs 5, a reinforcing rod 53 is fixedly connected between the two support rods 51, and two reinforcing rods 54 are symmetrically fixedly connected between the two reinforcing rods 53. The reinforcing rod 53 enhances the connection strength between the two support rods 51, locks the included angle between them, and prevents the support rods 51 from deforming or changing angle during support. The reinforcing rods 54 further enhance the connection stability between the two support legs 5. Through their cooperation, the overall structural strength and stability of the support legs 5 are significantly improved, ensuring the safety and reliability of the UAV during takeoff, landing, and parking. The reinforcing rod 53 is fixedly connected between the two support rods 51, providing support and fixation and limiting changes in the included angle between them. The two reinforcing rods 54 are symmetrically fixedly connected between the two reinforcing rods 53, connecting the two support legs 5 into a whole and limiting changes in the included angle between the two support legs 5, thus jointly ensuring the stability of the support legs 5.

[0031] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A heavy-duty multi-rotor unmanned aerial vehicle (UAV) comprising a UAV body (1), a plurality of cantilever arms (2) fixedly connected to the outside of the UAV body (1), rotors (3) connected to the cantilever arms (2), and a connecting mechanism (4) for fixing the rotors (3) to the cantilever arms (2). Its features are: The connecting mechanism (4) includes a sleeve (41) that can move axially on the cantilever (2), an opening (42) on the outside of the sleeve (41), a mounting plate (43) fixedly connected to the side of the sleeve (41) away from the opening (42) for connecting with the rotor (3), and a fixing member (44) provided on the sleeve (41) at the position corresponding to the outside of the opening (42).

2. The heavy-lift multicopter unmanned aerial vehicle of claim 1, wherein: The length of the mounting plate (43) is longer than the length of the sleeve (41).

3. The heavy-lift multicopter unmanned aerial vehicle of claim 1, wherein: The fastener (44) includes a first fixing plate (441) and a second fixing plate (442). The first fixing plate (441) and the second fixing plate (442) are respectively fixedly connected to one end of the sleeve (41) near the opening (42). The first fixing plate (441) and the second fixing plate (442) are connected by bolts and anti-loosening nuts.

4. The heavy-lift multicopter of claim 3, wherein: Both the first fixing plate (441) and the second fixing plate (442) have multiple through holes (443) along their length for bolts to pass through.

5. The heavy-lift multicopter unmanned aerial vehicle of claim 1, wherein: A servo motor (31) is fixedly connected to one end of the mounting plate (43) away from the sleeve (41). The output end of the servo motor (31) is fixedly connected to the shaft of the rotor (3). The servo motor (31) is electrically connected to the main body (1) of the UAV via a wire.

6. The heavy-lift multicopter of any of claims 1-5, wherein: The drone also includes two support legs (5) symmetrically fixedly connected to the bottom of the drone body (1). The two support legs (5) are in a figure-eight shape. The support legs (5) are composed of two support rods (51) fixedly connected to the drone body (1) and a crossbar (52) fixedly connected to the bottom of the two support rods (51).

7. The heavy-lift multicopter of claim 6, wherein: A reinforcing rod (53) is fixedly connected between the two support rods (51), and two reinforcing rods (54) are symmetrically fixedly connected between the two reinforcing rods (53).

Images