TLD damping platform for taking off and landing of large unmanned aerial vehicle

Abstract

The invention discloses a TLD damping platform for take-off and landing of a large unmanned aerial vehicle. The TLD damping platform comprises a take-off and landing platform, a water tank, a lower supporting device, a connecting device and an upper supporting device. The lifting platform is located at the top end of the water tank. The lower supporting device is located below the water tank, and an upper supporting device is arranged between the bottom end of the water tank and the lower supporting device; the side face of the water tank is connected with the lower supporting device through an obliquely-arranged connecting device. The connecting device and the upper supporting device are arranged between the water tank and the lower supporting device, so that vertical impact force generated by taking off and landing of the unmanned aerial vehicle can be effectively absorbed and dispersed, and vertical vibration of the take-off and landing platform is weakened; when the water tank deviates in the horizontal direction, horizontal vibration energy can be further dissipated through the obliquely-arranged self-resetting compression rod, and resetting of the water tank and the lifting platform is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) platforms, and in particular to a TLD shock-absorbing platform for take-off and landing of large UAVs. Background Art

[0002] The low-altitude economy, an emerging economic model encompassing drone-based logistics, aerial tours, emergency rescue, and other areas, is bringing new possibilities to urban transportation and logistics. Within the logistics sector, large cargo drones are increasingly being used. They not only enable end-to-end delivery but are also expanding into intercity logistics. Large cargo drones hold enormous potential in logistics and transportation. Consequently, a growing number of cities are constructing drone takeoff and landing platforms on rooftops to accommodate the widespread use of drones within their cities.

[0003] However, during takeoff and landing, large drones can experience significant vibrations due to unstable airflow when in contact with the landing platform. As drone payloads increase, this vibration becomes increasingly significant, impacting both the drone's safety and the stability of building structures. This vibration not only threatens the drone's normal operation but also potentially disrupts the building structure, impacting its long-term performance.

[0004] A tuned liquid damper (TLD) is a device used for passive structural control. Its vibration reduction principle uses the lateral force generated by the sloshing of liquid in a fixed tank to dissipate some of the structural vibration energy, thereby reducing the structure's horizontal vibration response. By optimizing the liquid volume, tank shape, and tuning frequency, TLD tanks can significantly reduce the acceleration response and displacement amplitude of building structures, thereby extending the service life of the structure.

[0005] Chinese utility model patent CN222716118U (publication date: April 4, 2025) discloses a fire water tank with enhanced TLD functionality. The tank primarily comprises a water tank body and several water guides disposed within the body. The water guides are used to guide the water in the tank body to change direction during sloshing, thereby increasing the water's energy dissipation during collisions. By disposing water guides within the tank body, the patent guides the water to change direction during sloshing, increasing the water's energy dissipation during collisions and thereby reducing vibrations in the main structure itself.

[0006] Chinese invention patent CN 113802906 A (publication date: August 29, 2021) discloses a construction steel platform system that uses TLD and TMD composite tuning and shock absorption. According to the actual wind load and seismic load requirements, the invention selects a series combination or a parallel combination of TLD and TMD to reduce the vibration of the construction steel platform system under wind load or seismic load. The water and baffles in the water tank can be replaced at any time to control the tuning frequency of the TLD to always be within a reasonable range. The stiffness of the spring in the TMD is adjustable to control the first-order frequency of the entire construction steel platform system, so that the TLD and TMD can provide greater vibration reduction force.

[0007] Chinese invention patent CN103541458A (publication date: January 29, 2014) discloses a novel tuned liquid damper, comprising a water tank, a baffle, a baffle fixing and adjustment device, and elastic supports and joints. This patent combines the advantages of a tuned liquid damper (TLD) and a tuned liquid column damper (TLCD), ensuring simple manufacture, wide application, and enhanced shock absorption. The patent uses a rectangular deep water tank as its basic model. A hinged fixture is installed in the center of the tank bottom, with elastic supports at both ends. A vertically positioned flat plate is positioned in the center of the tank, and its depth into the liquid can be adjusted. When subjected to wind or seismic loads, the liquid in the tank vibrates horizontally and experiences vertical level fluctuations, thereby increasing its vibration energy dissipation. The damping ratio of the liquid damper can also be adjusted by adjusting the height of the plate and altering the liquid flow pattern. This patented device is installed on the top of a high-rise building. It can not only be used to provide fire-fighting and domestic water for the high-rise building, but also can be used to control wind vibration and earthquake response of the high-rise building, thereby improving the comfort and safety of the building.

[0008] A search and analysis revealed that research on large-scale unmanned takeoff and landing platforms is limited. Research on TLDs primarily focuses on their application in structures such as high-rise buildings, bridges, and construction platforms. Further research is needed to address the issue of how to utilize TLDs for large-scale drone takeoff and landing platforms to mitigate the adverse effects of vibration during takeoff and landing on the drone's safety and the stability of the building structure. Therefore, there is an urgent need to develop a drone takeoff and landing platform with efficient seismic isolation. Summary of the Invention

[0009] To address the above issues, the present invention provides a TLD shock-absorbing platform for large UAV takeoff and landing. Installed on the top floor of an urban building, it eliminates the adverse effects of vibration during takeoff and landing on the safety of the UAV itself and the stability of the building structure. The specific technical solution is as follows:

[0010] A TLD shock-absorbing platform for large unmanned aerial vehicle (UAV) takeoff and landing, comprising a take-off and landing platform, a water tank, a lower support device, a connecting device, and an upper support device; the take-off and landing platform is located at the top of the water tank; the lower support device is located below the water tank, and the upper support device is arranged between the bottom end of the water tank and the lower support device; the side of the water tank and the lower support device are connected by an obliquely arranged connecting device, and the connecting device includes a self-resetting compression rod, which is inclined outward from top to bottom.

[0011] The water tank is a rectangular water tank, and a water inlet and a drain outlet are provided at the lower position of the side of the water tank, and an exhaust hole is provided at the upper position.

[0012] The lower supporting device includes a base plate and an anchor rod; the anchor rod is installed below the base plate and is used to connect the base plate to the top floor of the building.

[0013] The connecting device includes a self-resetting compression rod, a connecting shaft and a coupling seat; the self-resetting compression rod includes a connecting head, which is arranged at both ends of the self-resetting compression rod; the coupling seat is arranged on the side and bottom plate of the water tank; the connecting head of the self-resetting compression rod and the coupling seat are movably connected through the connecting shaft.

[0014] The upper supporting device includes a load-bearing leg, a load-bearing plate, a supporting spring, a fixed shell and a load-bearing block; the load-bearing block is installed on the bottom plate; the fixed shell is installed above the load-bearing block; the top of the fixed shell is provided with a second through-hole for the load-bearing leg to pass through, the bottom end of the fixed shell is closed, and the interior of the fixed shell is provided with a supporting spring and a load-bearing plate; the bottom of the support spring is fixedly connected to the inner bottom surface of the fixed shell, and the top of the support spring is fixedly connected to the load-bearing plate; the load-bearing leg is installed below the water tank; the bottom end of the load-bearing leg is inserted into the interior of the fixed shell through the second through-hole and is fixedly connected to the load-bearing plate.

[0015] Furthermore, the self-resetting compression rod also includes a piston rod, a piston, a cylinder body and a reset spring; the top of the cylinder body is provided with a through hole for the piston rod to pass through, the bottom end of the cylinder body is closed and a connecting head is fixedly installed; the top end of the piston rod is fixedly installed with a connecting head, the bottom end of the piston rod is inserted into the interior of the cylinder body through the through hole and is fixedly connected to the piston; the reset spring is located in the cylinder body, and one end of the reset spring is fixedly connected to the inner bottom surface of the cylinder body, and the other end is fixedly connected to the piston.

[0016] Furthermore, the connecting shaft is a cross shaft, which includes a first shaft and a second shaft arranged perpendicular to each other, and the two shafts are fixedly connected to form a cross shaft, the two sides of the first shaft are connected to the coupling seat, and the two sides of the second shaft are connected to the connecting head.

[0017] Furthermore, an oil return hole is provided on the piston; and a sealing ring is provided on the cylinder body corresponding to the through hole.

[0018] Furthermore, the connecting head and the coupling seat are hinged via a cross shaft.

[0019] Compared with the prior art, the advantages and effects of the present invention are as follows:

[0020] 1. A TLD shock-absorbing platform for large UAV takeoff and landing. The TLD water tank is connected to the takeoff and landing platform. The sloshing of the liquid in the water tank is used to dissipate part of the vibration energy of the takeoff and landing platform during the takeoff and landing of the UAV, thereby reducing the horizontal vibration response.

[0021] 2. A TLD shock-absorbing platform for large unmanned aerial vehicle (UAV) takeoff and landing. Through a connecting device and an upper support device set between the water tank and the lower support device, it can effectively absorb and disperse the vertical impact force generated by the UAV takeoff and landing, reducing the vertical vibration of the take-off and landing platform. When the water tank deviates in the horizontal direction, the inclined self-resetting compression rod can further dissipate the horizontal vibration energy and promote the reset of the water tank and the take-off and landing platform.

[0022] 3. A TLD vibration reduction platform for large UAV takeoff and landing. This platform improves vibration reduction by adjusting the water depth within the tank and controlling the tank's resonant frequency. By aligning the tank's resonant frequency with the horizontal vibration frequency generated by the UAV during takeoff and landing, optimal vibration reduction is achieved. Furthermore, when vibration reduction is no longer required, the water in the tank can be used as a backup water source and for firefighting, contributing to energy conservation and environmental protection.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiment of the present application in conjunction with the accompanying drawings.

[0024] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without inventive work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] in:

[0027] Figure 1 This is a schematic diagram of the structure of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0028] Figure 2 A top view of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0029] Figure 3 A cross-sectional view of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the connection device of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0031] Figure 5 This is a schematic cross-sectional view of the self-resetting compression rod of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the upper support device of the TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles provided by the present invention.

[0033] Explanation of the reference numerals: 1-lifting and lowering platform; 2-water tank; 21-water inlet; 22-drain outlet; 23-exhaust hole; 3-lower supporting device; 31-base plate; 32-anchor rod; 4-connecting device; 41-self-resetting compression rod; 411-piston rod; 412-piston; 4121-oil return hole; 413-cylinder body; 4131-sealing ring; 414-reset spring; 415-connecting head; 42-connecting shaft; 43-coupling seat; 5-upper supporting device; 51-load-bearing leg; 52-load-bearing plate; 53-support spring; 54-fixing shell; 55-load-bearing block. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted in the embodiments.

[0035] It should be understood that references throughout this specification to "one embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "one embodiment" or "this embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0037] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0038] The term "at least one" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0039] It should also be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprises," or any other variations thereof are intended to cover non-exclusive inclusion.

[0040] Example 1

[0041] This embodiment introduces a TLD shock-absorbing platform for takeoff and landing of large unmanned aerial vehicles.

[0042] Please refer to Figure 1-Figure 3 , Figure 1 This is a schematic diagram of the structure of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention; Figure 2 A top view of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention; Figure 3 A cross-sectional view of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0043] A TLD shock-absorbing platform for large unmanned aerial vehicle takeoff and landing, comprising a take-off and landing platform 1, a water tank 2, a lower support device 3, a connecting device 4 and an upper support device 5; the take-off and landing platform 1 is located at the top of the water tank 2; the lower support device 3 is located below the water tank 2, and the upper support device 5 is arranged between the bottom end of the water tank 2 and the lower support device 3; the side of the water tank 2 and the lower support device 3 are connected by an obliquely arranged connecting device 4, and the connecting device 4 includes a self-resetting compression rod 41, which is inclined outward from top to bottom.

[0044] Water tank 2 is a rectangular tank filled with liquid. During takeoff and landing of a large UAV, unbalanced loads or unstable airflow can cause significant vibration, resulting in a significant vertical impact on the landing platform at the moment of contact. At this point, the UAV and landing platform 1 will cause the water tank 2 to vibrate synchronously, causing the liquid inside to slosh, generating a dynamic pressure differential on the sidewalls of the tank 2. This dynamic pressure differential acts on the structure, acting as a damping force to suppress structural vibration. Simultaneously, the liquid sloshing dissipates further vibration energy through viscous energy dissipation, free surface breaking waves, and friction with the inner wall of the tank 2.

[0045] A water inlet 21 and a water outlet 22 are provided at the lower side of the water tank 2; the water depth can be adjusted according to the weight of the drone, thereby controlling the resonant frequency of the water tank 2 so that its frequency is consistent with the horizontal vibration frequency generated when the drone takes off and lands, thereby achieving the best vibration reduction effect.

[0046] An exhaust hole 23 is provided on the upper side of the water tank 2 so that the internal cavity of the water tank 2 is connected to the outside to avoid unstable internal air pressure.

[0047] The lower support device 3 includes a base plate 31 and anchor rods 32; the anchor rods 32 are installed below the base plate 31 and are used to connect the base plate 31 to the top floor of the building; the number of anchor rods 32 is 4 and they are distributed in a rectangular shape.

[0048] Two or more connecting devices 4 are provided on each side of the water tank 2, and the connecting devices 4 need to be arranged symmetrically and evenly.

[0049] The number of the upper supporting devices 5 is four and they are distributed in a rectangular shape.

[0050] The technical effect of this embodiment is as follows: A TLD shock-absorbing platform for large unmanned aerial vehicles (UAVs) takes off and lands. By providing a connecting device and an upper supporting device, the water tank has a certain amount of space for movement in the horizontal and vertical directions. When the large UAV takes off and lands on the take-off and landing platform, the water tank will generate horizontal and vertical vibrations. The connecting device and the upper supporting device can dissipate the vibration energy and convert the kinetic energy of the vibration into other forms of energy. At the same time, the water in the water tank will sway in the horizontal direction, generating a dynamic lateral force to further dissipate the energy of the structural vibration. The symmetrically arranged connecting devices will generate an unbalanced horizontal thrust when the water tank deviates from its original position, prompting the water tank to reset and ensure that the water tank can accurately return to its initial position when the vibration stops.

[0051] Example 2

[0052] Based on Example 1, this example introduces a connection device for a TLD shock-absorbing platform used for take-off and landing of a large unmanned aerial vehicle.

[0053] Please refer to Figure 4 , Figure 4 Schematic diagram of the connecting device structure of the TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles provided by the present invention; the connecting device 4 includes a self-resetting compression rod 41, a connecting shaft 42 and a coupling seat 43; the self-resetting compression rod 41 includes a connecting head 415, which is arranged at both ends of the self-resetting compression rod 41; the coupling seat 43 is arranged at the upper position of the side of the water tank 2 and near the four edges of the bottom plate 31; the connecting head 415 of the self-resetting compression rod 41 and the coupling seat 43 are movably connected by the connecting shaft 42, and the self-resetting compression rod 41 can rotate in the vertical and horizontal directions relative to the coupling seat 43.

[0054] The technical effect of this embodiment is as follows: the connecting device provided between the water tank and the lower supporting device can effectively absorb and disperse the vertical impact force generated by the take-off and landing of the UAV, thereby reducing the vertical vibration of the take-off and landing platform.

[0055] Example 3

[0056] Based on Example 2, this example introduces a self-resetting compression rod of a TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles.

[0057] Please refer to Figure 5 , Figure 5 This is a schematic cross-sectional view of the self-resetting compression rod of the TLD shock-absorbing platform for take-off and landing of large UAVs provided by the present invention;

[0058] Furthermore, the self-resetting compression rod 41 also includes a piston rod 411, a piston 412, a cylinder body 413 and a reset spring 414; the top of the cylinder body 413 is provided with a through hole 1 for the piston rod 411 to pass through, the bottom end of the cylinder body 413 is closed, and a connecting head 415 is fixedly installed, and damping fluid is provided in the cylinder body 413; the top of the piston rod 411 is fixedly installed with a connecting head 415, and the bottom end of the piston rod 411 is inserted into the interior of the cylinder body 413 through a through hole 1 and is fixedly connected to the piston 412; the reset spring 414 is located in the cylinder body 413, and one end of the reset spring 414 is fixedly connected to the inner bottom surface of the cylinder body 413, and the other end is fixedly connected to the piston 412.

[0059] Furthermore, the connecting shaft 42 is a cross shaft, which includes a first shaft and a second shaft arranged perpendicular to each other, and the two shafts are fixedly connected to form a cross shaft. The two sides of the first shaft are connected to the coupling seat 43, and the two sides of the second shaft are connected to the connecting head 415.

[0060] Furthermore, an oil return hole 4121 is provided on the piston 412 ; and a sealing ring 4131 is provided on the cylinder body 413 corresponding to the through hole.

[0061] Furthermore, the connector 415 and the coupling seat 43 are hinged via a cross axis.

[0062] Furthermore, the piston rod 411, the piston 412 and the cylinder body 413 are all made of high-performance steel; the return spring 414 has high strength, high elasticity and self-recovery ability; the sealing ring 4131 is made of high-performance chloroprene rubber, which has good oil resistance, aging resistance and other properties. The sealing ring 4131 is clamped in a through hole of the cylinder body and forms good air tightness with the piston rod 41.

[0063] Furthermore, when the self-resetting compression rod 41 is axially compressed along the piston rod 411 under force, since the piston 412 can limit the circulation of the damping fluid in the cylinder body, the damping fluid can only pass slowly through the return oil hole 4121, thereby achieving a damping effect and dissipating the vibration energy of the take-off and landing platform 1 and the water tank 2.

[0064] The technical effect of this embodiment: by using the self-resetting compression rod as a connecting device, when the water tank is offset in the horizontal direction, the inclined self-resetting compression rod can further dissipate the horizontal vibration energy and promote the reset of the water tank and the lifting platform.

[0065] Example 4

[0066] Based on Example 1, this example introduces an upper support device of a TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles.

[0067] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the cross-sectional structure of the upper support device of the TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles provided by the present invention.

[0068] The upper supporting device 5 includes a load-bearing leg 51, a load-bearing plate 52, a support spring 53, a fixed shell 54 and a load-bearing block 55; the load-bearing block 55 is installed on the base plate 31; the fixed shell 54 is installed above the load-bearing block 55; the top of the fixed shell 54 is provided with a through hole 2 for the load-bearing leg 51 to pass through, the bottom end of the fixed shell 54 is closed, and the interior of the fixed shell 54 is provided with a support spring 53 and a load-bearing plate 52; the bottom of the support spring 53 is fixedly connected to the inner bottom surface of the fixed shell 54, and the top thereof is fixedly connected to the load-bearing plate 52; the load-bearing leg 51 is installed below the water tank 2; the bottom end of the load-bearing leg 51 is inserted into the interior of the fixed shell 54 through the through hole 2 and is fixedly connected to the load-bearing plate 52.

[0069] The load-bearing legs 51 are made of natural rubber and have a certain tangential deformation capability, which can meet the horizontal displacement requirements of the water tank 2 .

[0070] The technical effect of this embodiment is as follows: by arranging an upper support device between the water tank and the lower support device, the vertical impact force generated by the take-off and landing of the UAV can be effectively absorbed and dispersed, and the vertical vibration of the take-off and landing platform can be reduced.

[0071] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included within the scope of protection defined by the claims of the present invention.

Claims

1. A TLD shock-absorbing platform for large UAV take-off and landing, characterized by: include: A lifting and lowering platform (1), a water tank (2), a lower supporting device (3), a connecting device (4) and an upper supporting device (5); The lifting and lowering platform (1) is located at the top of the water tank (2); The lower supporting device (3) is located below the water tank (2), and an upper supporting device (5) is provided between the bottom end of the water tank (2) and the lower supporting device (3); The side of the water tank (2) and the lower support device (3) are connected via an obliquely arranged connecting device (4), wherein the connecting device (4) comprises a self-resetting compression rod (41), and the self-resetting compression rod (41) is inclined outward from top to bottom.

2. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 1, characterized in that: The connecting device (4) further comprises a connecting shaft (42) and a coupling seat (43); the self-resetting compression rod (41) comprises a connecting head (415) which is arranged at both ends of the self-resetting compression rod (41); the coupling seat (43) is arranged on the side surface and the bottom plate (31) of the water tank (2); the connecting head (415) of the self-resetting compression rod (41) and the coupling seat (43) are movably connected via the connecting shaft (42).

3. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 2, characterized in that: The self-resetting compression rod (41) further comprises a piston rod (411), a piston (412), a cylinder (413) and a reset spring (414); The top end of the cylinder body (413) is provided with a through hole 1 for the piston rod (411) to pass through, and the bottom end of the cylinder body (413) is closed and fixedly mounted with a connector (415); The top end of the piston rod (411) is fixedly mounted with a connector (415), and the bottom end of the piston rod (411) is inserted into the cylinder body (413) through a through hole 1 and is fixedly connected to the piston (412); The return spring (414) is located in the cylinder (413), and one end of the return spring (414) is fixedly connected to the inner bottom surface of the cylinder (413), and the other end is fixedly connected to the piston (412).

4. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 1, characterized in that: The load-bearing block (55) is mounted on the bottom plate (31); a fixed shell (54) is mounted above the load-bearing block (55); The top of the fixed shell (54) is provided with a second through-hole for the load-bearing leg (51) to pass through, the bottom of the fixed shell (54) is closed, and the interior of the fixed shell (54) is provided with a support spring (53) and a load-bearing sheet (52); The bottom of the support spring (53) is fixedly connected to the inner bottom surface of the fixed shell (54), and the top of the support spring (53) is fixedly connected to the load-bearing sheet (52); The load-bearing leg (51) is installed below the water tank (2); the bottom end of the load-bearing leg (51) is inserted into the interior of the fixed shell (54) through the second through hole and is fixedly connected to the load-bearing sheet (52).

5. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 3, characterized in that: The connecting shaft (42) is a cross shaft, comprising a first shaft and a second shaft arranged perpendicular to each other, the two shafts being fixedly connected to form a cross shaft, the two sides of the first shaft being connected to the shaft coupling seat (43), and the two sides of the second shaft being connected to the connector (415).

6. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 5, characterized in that: The water tank (2) is a rectangular water tank, and a water inlet (21) and a water outlet (22) are provided at the lower portion of the side of the water tank (2), and an air vent (23) is provided at the upper portion.

7. According to the TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles as described in claim 5, the piston (412) is further provided with an oil return hole (4121); and a sealing ring (4131) is provided on the cylinder body (413) corresponding to the through hole.

8. According to a TLD shock-absorbing platform for take-off and landing of large unmanned aerial vehicles according to any one of claims 1 to 7, the lower support device (3) includes a base plate (31) and an anchor rod (32); the anchor rod (32) is installed below the base plate (31).

9. A TLD shock-absorbing platform for take-off and landing of large UAV according to any one of claims 1 to 7, characterized in that: The upper supporting device (5) comprises a load-bearing leg (51), a load-bearing plate (52), a support spring (53), a fixing shell (54) and a load-bearing block (55).

10. The TLD shock-absorbing platform for take-off and landing of large UAV according to claim 9, characterized in that: The connecting head (415) and the coupling seat (43) are hinged via a cross shaft.

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