A damping device for a rotating shaft of a drone

Abstract

The utility model discloses a kind of damping device of unmanned plane rotating shaft, it is related to unmanned plane technical field, including: unmanned plane body and damping protection piece, unmanned plane body has rotor support, the end of rotor support is equipped with rotor drive structure, the end of rotor support is located below rotor drive structure and is equipped with through mounting hole;Damping protection piece is connected in the outside of rotor drive structure by mounting rod through mounting hole, the connecting place of mounting rod and mounting hole has elastic damping part, the outside of mounting rod is formed with damping and protection structure.The utility model sets up mounting hole by being arranged at the end of rotor support, connects damping protection piece in the outside of rotor drive structure, and sets up elastic damping part at the connecting place of mounting rod and mounting hole, can effectively buffer the vibration and impact of rotor rotating shaft, improve the flight stability and reliability of unmanned plane under complex environment.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and more specifically to a shock absorption device for the rotating shaft of a UAV. Background Technology

[0002] With the rapid development of drone technology, it has been widely and deeply applied in many fields such as aerial photography, surveying and mapping, logistics and transportation, agricultural plant protection, and emergency rescue. As one of the key components of a drone, the stability and reliability of its rotation axis directly affect the drone's flight performance and service life.

[0003] Although some drones have incorporated certain shock absorption measures into their existing structural designs, several significant shortcomings still exist:

[0004] Limited shock absorption effect: Many drones rely solely on simple shock-absorbing pads or rubber gaskets to buffer the vibration and impact of the rotor shaft. These methods can play a certain role in low-frequency, small-amplitude vibrations, but their shock absorption effect is negligible for the high-frequency, high-intensity vibrations that drones experience when flying in complex environments, such as those generated in strong winds, turbulence, or during rapid maneuvers. This results in a large vibration amplitude of the rotor shaft, affecting the drone's flight stability and control accuracy.

[0005] Lack of targeted vibration damping design: Most drone vibration damping measures are generalized and not specifically designed for the unique motion and stress characteristics of the rotor shaft. During rotation, the rotor generates complex interactions of centrifugal force, Coriolis force, and aerodynamic forces. Existing vibration damping devices fail to effectively isolate and buffer the impact of these specific forces on the rotor shaft. Prolonged exposure to this adverse stress environment can easily lead to fatigue damage to the rotor shaft and its connecting components, shortening the drone's lifespan and increasing the probability of malfunctions.

[0006] Impact on rotor performance: Inappropriate installation locations and structural designs of some vibration damping devices, while attempting to reduce vibration, adversely affect the normal rotation and aerodynamic performance of the rotor. For example, some damping devices may hinder smooth rotor rotation, increase rotational drag, reduce rotor propulsion efficiency, and thus affect the UAV's endurance and flight performance; or they may alter the airflow distribution around the rotor, leading to poorer rotor lift characteristics and affecting the UAV's flight attitude control.

[0007] Given the shortcomings of the existing technologies, it is essential to develop a highly efficient vibration damping device specifically designed for the rotor shaft of drones. This would not only significantly improve the flight stability and reliability of drones in complex environments, extend the service life of rotors and related components, and reduce maintenance costs, but also further enhance the overall performance of drones, expand their application scenarios and scope, and meet the growing market demand for high-performance drones. Utility Model Content

[0008] In view of this, the present invention provides a shock-absorbing device for the rotating shaft of a drone, which aims to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A shock-absorbing device for the rotating shaft of a drone, comprising:

[0011] The drone body has a rotor bracket, a rotor drive structure is installed at the end of the rotor bracket, and a through mounting hole is opened at the end of the rotor bracket below the rotor drive structure.

[0012] A shock-absorbing and protective component is provided, wherein the shock-absorbing and protective component is connected to the outside of the rotor drive structure via a mounting rod passing through the mounting hole. The connection between the mounting rod and the mounting hole has an elastic shock-absorbing part, and a shock-absorbing and protective structure is formed on the outside of the mounting rod.

[0013] Through the above technical solution, this utility model provides a mounting hole at the end of the rotor support, connects the shock-absorbing protective component to the outside of the rotor drive structure, and provides an elastic shock-absorbing part at the connection between the mounting rod and the mounting hole. This can effectively buffer the vibration and impact of the rotor shaft and improve the flight stability and reliability of the UAV in complex environments.

[0014] Preferably, in the above-mentioned shock absorption device for the rotor shaft of a UAV, the shock absorption protective component further includes an outer protective ring frame, shock absorption springs, and positioning heads. The outer protective ring frame extends through both ends of the mounting rod. Two shock absorption springs are respectively fitted onto both sides of the mounting rod, and each spring is pressed against the inner side of the outer protective ring frame and between the rotor support end. Two positioning heads are respectively locked to both ends of the mounting rod. The shock absorption protective component, comprising an outer protective ring frame, shock absorption springs, and positioning heads, with the shock absorption springs fitted onto both sides of the mounting rod and pressed against the inner side of the outer protective ring frame and between the rotor support end, can more accurately buffer and absorb vibrations from different directions, enhancing the shock absorption effect.

[0015] Preferably, in the above-mentioned shock-absorbing device for a drone's rotating shaft, the end of the mounting rod has a threaded connection hole, and the inner side of the positioning head forms a clearance cavity. The diameter of the clearance cavity is larger than the outer diameter of the mounting rod, and a threaded rod is fixed to the inner bottom of the clearance cavity. The threaded rod connects to the threaded connection hole, so that the outer edge of the positioning head presses against the outer ring wall of the outer protective ring frame. The threaded connection hole at the end of the mounting rod connects to the threaded rod on the inner side of the positioning head, and the outer edge of the positioning head presses against the outer ring wall of the outer protective ring frame. This structure facilitates the installation and disassembly of the shock-absorbing protective component. At the same time, by adjusting the clamping force of the positioning head, the support strength of the outer protective ring frame can be changed to adapt to vibrations of different intensities.

[0016] Preferably, in the above-mentioned shock-absorbing device for the rotor shaft of a UAV, the outer protective ring includes straight segments connected to both ends of the mounting rod, a semi-circular segment connecting the ends of the two straight segments away from the UAV body, and an inwardly curved segment connecting the other ends of the two straight segments. The support strength of the semi-circular segment can be adjusted by the clamping force of the positioning head on the straight segments. The structural design of the straight segments, semi-circular segments, and curved segments of the outer protective ring can prevent external objects from directly impacting the rotor shaft, protecting the rotor drive structure from damage; and the support strength of the semi-circular segment can be adjusted by the clamping force of the positioning head, making the protective structure more flexible and adaptable.

[0017] Preferably, in the above-mentioned shock-absorbing device for the rotating shaft of a UAV, the mounting hole is a square hole, the mounting rod is a square rod that mates with the mounting hole, and a square limiting hole for insertion into the straight section is provided. This mating method can prevent the mounting rod and the outer protective ring from rotating relative to each other during vibration, ensuring the stability and reliability of the shock-absorbing protective component.

[0018] Preferably, in the above-mentioned shock absorption device for the rotating shaft of a drone, the outer end face of the positioning head is made of rubber, which can increase the friction with the outer protective ring and prevent the outer protective ring from shifting during vibration. At the same time, the rubber material can also play a certain buffering role and improve the protective performance.

[0019] Preferably, in the above-mentioned shock-absorbing device for the rotating shaft of a UAV, the mounting rod has an annular variable-diameter section with a reduced diameter at its center, and a rubber sleeve is fitted onto the annular variable-diameter section. This further enhances the shock absorption effect, and the length of the rubber sleeve is greater than the length of the mounting hole, ensuring effective shock absorption protection throughout the entire range of the mounting hole.

[0020] Preferably, in the above-mentioned shock-absorbing device for the rotating shaft of a drone, the outer surface of the rubber sleeve is flush with or higher than the surface of the mounting rod. The rubber sleeve also provides some protection for the drone body, preventing hard contact between the mounting rod and the drone body, reducing wear, and extending the drone's service life.

[0021] Preferably, in the above-mentioned shock-absorbing device for the drone's rotating shaft, the length of the rubber sleeve is greater than the length of the mounting hole. Through the synergistic effect of the above components, the structural design of the shock-absorbing device for the drone's rotating shaft is optimized, making it more reasonable and efficient, better meeting the usage needs of drones in different environments, and improving the overall performance of the drone.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a shock absorption device for the rotating shaft of a drone, which has the following beneficial effects:

[0023] 1. Improved flight stability and reliability: This utility model sets an installation hole at the end of the rotor bracket, connects the shock-absorbing protective component to the outside of the rotor drive structure, and sets an elastic shock-absorbing part at the connection between the mounting rod and the installation hole, which effectively buffers the vibration and impact of the rotor shaft, significantly improves the flight stability and reliability of the UAV in complex environments, and reduces the risk of flight attitude loss and equipment damage caused by vibration.

[0024] 2. Significantly enhanced shock absorption: The shock absorption and protection components include an outer protective ring, shock absorption springs, and positioning heads. The shock absorption springs are sleeved on both sides of the mounting rod and pressed tightly between the inner side of the outer protective ring and the end of the rotor bracket. This can more accurately buffer and absorb vibrations from different directions, effectively isolate the influence of complex forces generated during rotor rotation on the rotating shaft, reduce fatigue damage, and extend the service life of the UAV.

[0025] 3. Easy installation and adaptability: The threaded connection hole at the end of the mounting rod connects to the threaded rod inside the positioning head, and the outer edge of the positioning head presses tightly against the outer ring wall of the outer protective ring, making the installation and disassembly of the shock-absorbing protective component convenient and efficient. At the same time, by adjusting the clamping force of the positioning head, the support strength of the outer protective ring can be flexibly changed, enabling the shock-absorbing device to adapt to vibrations of different intensities and various complex flight environments.

[0026] 4. Optimized protective structure design: The straight, semi-circular, and arc-shaped sections of the outer protective ring effectively prevent external objects from directly impacting the rotor shaft, protecting the rotor drive structure from damage. The outer end face of the positioning head is made of rubber, increasing friction with the outer protective ring and preventing displacement of the outer protective ring during vibration, ensuring the stability and reliability of the protective structure.

[0027] 5. Preventing relative rotation and improving stability: The mounting hole is a square hole, and the mounting rod is a square rod. A square limiting hole is opened on the straight section to fit into the mounting rod. This fit can prevent the mounting rod and the outer protective ring from rotating relative to each other during vibration, ensuring the stability and reliability of the shock-absorbing protective components and improving the stability of the UAV during flight.

[0028] 6. Enhanced Comprehensive Protection and Shock Absorption: The rubber sleeve is positioned on the annular variable-diameter section in the middle of the mounting rod. Its outer surface is flush with or higher than the surface of the mounting rod, further enhancing the shock absorption effect. Simultaneously, the length of the rubber sleeve exceeds the length of the mounting hole, ensuring effective shock absorption protection throughout the entire mounting hole area. Furthermore, the rubber sleeve also provides some protection for the drone body, preventing hard contact between the mounting rod and the drone body, reducing wear, and extending the drone's service life.

[0029] 7. Optimized structural design to meet requirements: Through the synergistic effect of the above components, the structural design of the shock absorption device of the UAV's rotating shaft has been optimized, making it more reasonable and efficient. This better meets the usage requirements of the UAV in different environments, improves the overall performance of the UAV, expands its application scenarios and scope of application, and provides strong support for the widespread application of UAVs in many fields such as aerial photography, surveying and mapping, and logistics transportation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 The attached figure is a structural schematic diagram of the shock absorption device for the rotating shaft of the UAV provided by this utility model;

[0032] Figure 2 The attached figure is a partially disassembled structural schematic diagram of the shock absorption device for the rotating shaft of the UAV provided by this utility model;

[0033] Figure 3 The attached figure is a structural schematic diagram of the shock-absorbing and protective component provided by this utility model;

[0034] Figure 4 The attached figure is an exploded view of the structure of the shock-absorbing and protective component provided by this utility model;

[0035] Figure 5 The attached figure is a structural schematic diagram of the mounting rod provided by this utility model;

[0036] Figure 6The attached figure is a structural schematic diagram of the positioning head provided by this utility model.

[0037] in:

[0038] 1- The drone itself;

[0039] 11-Rotor bracket; 111-Mounting hole; 12-Rotor drive structure;

[0040] 2-Shock-absorbing and protective components;

[0041] 21-Mounting rod; 211-Threaded connection hole; 212-Annular reducing section; 22-Outer protective ring frame; 221-Straight section; 2211-Square limiting hole; 222-Semi-circular section; 223-Arc-shaped section; 23-Shock-absorbing spring; 24-Positioning head; 241-Allowing cavity; 242-Threaded rod; 25-Rubber sleeve. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] See appendix Figure 1 To be continued Figure 3 This utility model discloses a shock absorption device for the rotating shaft of a drone, comprising:

[0044] The drone body 1 has a rotor support 11, a rotor drive structure 12 is installed at the end of the rotor support 11, and a through mounting hole 111 is opened at the end of the rotor support 11 below the rotor drive structure 12.

[0045] The shock-absorbing and protective component 2 is connected to the outside of the rotor drive structure 12 through the mounting rod 21 and the mounting hole 111. The connection between the mounting rod 21 and the mounting hole 111 has an elastic shock-absorbing part, and the outside of the mounting rod 21 forms a shock-absorbing and protective structure.

[0046] See appendix Figure 4 The shock-absorbing protective component 2 also includes an outer protective ring frame 22, shock-absorbing springs 23, and positioning heads 24. The outer protective ring frame 22 passes through the two ends of the mounting rod 21 on both sides. There are two shock-absorbing springs 23, which are respectively sleeved on both sides of the mounting rod 21. The shock-absorbing springs 23 are pressed against the inner side of the outer protective ring frame 22 and between the end of the rotor bracket 11. There are two positioning heads 24, which are respectively locked to the two ends of the mounting rod 21.

[0047] See appendix Figure 5 and attached Figure 6 The end of the mounting rod 21 has a threaded connection hole 211, and the inner side of the positioning head 24 forms a clearance cavity 241. The diameter of the clearance cavity 241 is larger than the outer diameter of the mounting rod 21, and a threaded rod 242 is fixed to the inner bottom of the clearance cavity 241. The threaded rod 242 is connected to the threaded connection hole 211, so that the outer edge of the positioning head 24 presses against the outer ring wall of the outer protective ring frame 22.

[0048] To further optimize the above technical solution, the outer protective ring frame 22 includes straight segments 221 connected to the two ends of the mounting rod 21. A semi-circular segment 222 is connected between the ends of the two straight segments 221 that are away from the UAV body 1. The other ends of the two straight segments 221 are respectively connected to inwardly curved segments 223. The support strength of the semi-circular segment 222 can be adjusted by the clamping force of the positioning head 24 on the straight segments 221.

[0049] To further optimize the above technical solution, the mounting hole 111 is a square hole, the mounting rod 21 is a square rod that mates with the mounting hole 111, and a square limiting hole 2211 that mates with the mounting rod 21 is provided on the straight section 221.

[0050] To further optimize the above technical solution, the outer end face of the positioning head 24 is made of rubber.

[0051] To further optimize the above technical solution, the middle part of the mounting rod 21 has an annular variable diameter section 212 with a reduced diameter, and a rubber sleeve 25 is fitted on the annular variable diameter section 212.

[0052] To further optimize the above technical solution, the outer surface of the rubber sleeve 25 is flush with or higher than the surface of the mounting rod 21.

[0053] To further optimize the above technical solution, the length of the rubber sleeve 25 is greater than the length of the mounting hole 111.

[0054] This utility model discloses a shock absorption device for the rotating shaft of a drone, which has the following working principle:

[0055] Shock absorption principle:

[0056] When a drone flies in complex environments (such as strong winds, turbulence, or high-speed maneuvering), the rotor shaft will generate high-frequency, high-intensity vibrations. The damping springs 23, which are sleeved on both sides of the mounting rod 21 and pressed against the inner side of the outer protective ring frame 22 and the end of the rotor support 11, can effectively buffer and absorb vibration energy, reducing the impact of vibration on the rotor shaft.

[0057] The elastic damping part is set at the connection between the mounting rod 21 and the mounting hole 111 to further enhance the damping effect and ensure the stability of the rotor shaft.

[0058] Protection principle:

[0059] The outer protective ring 22 is designed not only to absorb shocks but also to protect the rotor shaft. Its semi-circular section 222 and arc-shaped section 223 effectively prevent external objects from directly impacting the rotor shaft, protecting the rotor drive structure 12 from damage.

[0060] The outer end face of the positioning head 24 is made of rubber, which can increase the friction with the outer protective ring 22, prevent the outer protective ring 22 from shifting during vibration, and ensure the stability of the protective structure.

[0061] Regulation principle:

[0062] By adjusting the clamping force of the positioning head 24 on the straight segment 221, the support strength of the semicircular segment 222 can be changed. This design allows the vibration damping device to adapt to vibrations of different intensities, improving the flexibility and applicability of the device.

[0063] Structural fit principle:

[0064] The mounting hole 111 is a square hole, which matches the square design of the mounting rod 21. The square limiting hole 2211 on the straight section 221 ensures the precise connection between the mounting rod 21 and the outer protective ring frame 22, preventing relative rotation during vibration.

[0065] The rubber sleeve 25 is installed on the annular variable diameter section 212 of the mounting rod 21. Its outer surface is flush with or higher than the surface of the mounting rod 21, which further enhances the shock absorption effect. At the same time, the length of the rubber sleeve 25 is greater than the length of the mounting hole 111, ensuring that effective shock absorption protection can be provided throughout the entire range of the mounting hole 111.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shock-absorbing device for the rotating shaft of a drone, characterized in that, include: The unmanned aerial vehicle (UAV) body (1) has a rotor support (11), a rotor drive structure (12) is installed at the end of the rotor support (11), and a through mounting hole (111) is opened at the end of the rotor support (11) below the rotor drive structure (12). The shock-absorbing protective component (2) is connected to the outside of the rotor drive structure (12) by passing through the mounting hole (111) via a mounting rod (21). The connection between the mounting rod (21) and the mounting hole (111) has an elastic shock-absorbing part, and a shock-absorbing and protective structure is formed on the outside of the mounting rod (21).

2. The shock absorption device for a UAV rotating shaft according to claim 1, characterized in that, The shock-absorbing protective component (2) also includes an outer protective ring frame (22), shock-absorbing springs (23) and positioning heads (24); the two sides of the outer protective ring frame (22) pass through the two ends of the mounting rod (21); there are two shock-absorbing springs (23), which are respectively sleeved on both sides of the mounting rod (21); the shock-absorbing springs (23) are pressed against the inner side of the outer protective ring frame (22) and between the end of the rotor bracket (11); there are two positioning heads (24), which are respectively locked to the two ends of the mounting rod (21).

3. The shock absorption device for a UAV rotating shaft according to claim 2, characterized in that, The end of the mounting rod (21) has a threaded connection hole (211), and the inner side of the positioning head (24) forms a clearance cavity (241). The diameter of the clearance cavity (241) is larger than the outer diameter of the mounting rod (21), and a threaded rod (242) is fixed to the inner bottom of the clearance cavity (241). The threaded rod (242) is connected to the threaded connection hole (211), so that the outer edge of the positioning head (24) presses against the outer ring wall of the outer protective ring frame (22).

4. The shock absorption device for a UAV rotating shaft according to claim 3, characterized in that, The outer protective ring frame (22) includes straight segments (221) connected to the two ends of the mounting rod (21). A semi-circular segment (222) is connected between the ends of the two straight segments (221) away from the UAV body (1). The other ends of the two straight segments (221) are respectively connected to inwardly curved segments (223). The support strength of the semi-circular segment (222) can be adjusted by the clamping force of the positioning head (24) on the straight segments (221).

5. The shock absorption device for a UAV rotating shaft according to claim 4, characterized in that, The mounting hole (111) is a square hole, the mounting rod (21) is a square rod that mates with the mounting hole (111), and the straight segment (221) is provided with a square limiting hole (2211) that mates with the mounting rod (21).

6. The shock absorption device for a UAV rotating shaft according to claim 2, characterized in that, The outer end face of the positioning head (24) is made of rubber.

7. The shock absorption device for a UAV rotating shaft according to claim 1, characterized in that, The mounting rod (21) has an annular variable diameter section (212) with a reduced diameter in the middle, and a rubber sleeve (25) is fitted on the annular variable diameter section (212).

8. A shock-absorbing device for a UAV rotating shaft according to claim 7, characterized in that, The outer surface of the rubber sleeve (25) is flush with or higher than the surface of the mounting rod (21).

9. A shock-absorbing device for a UAV rotating shaft according to claim 8, characterized in that, The length of the rubber sleeve (25) is greater than the length of the mounting hole (111).

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