Multi-point contact adjustable unmanned aerial vehicle undercarriage

Abstract

The multi-point contact adjustable unmanned aerial vehicle undercarriage comprises a plurality of supporting legs, an adjusting unit and a plurality of grounding frames, the supporting legs are used for being hinged to the lower portion of an unmanned aerial vehicle shell and can rotate around the unmanned aerial vehicle shell, and the contact angle between the supporting legs and the ground is adjusted; the adjusting unit is connected with the supporting legs and used for driving the supporting legs to rotate. The plurality of grounding frames are respectively arranged at the bottom ends of the plurality of supporting legs in a one-to-one correspondence manner, each grounding frame is provided with a plurality of adjustable contact parts, and the contact parts are distributed around the bottoms of the supporting legs and can be adjusted according to the condition of an actual landing surface so as to adapt to various irregular landing surfaces; the undercarriage design of the unmanned aerial vehicle can provide necessary stability in complex terrains and effectively prevent overturning or damage in the take-off and landing process, so that the use efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to an adjustable landing gear for unmanned aerial vehicles with multi-point contact. Background Art

[0002] In today's era of rapid technological development, the application scope of drones has become more and more extensive, and it has penetrated into every aspect of our lives. Whether it is precision spraying in the agricultural field, aerial photography in the film and television industry, or reconnaissance missions in the military field, drones are everywhere.

[0003] The invention patent with publication number CN108177767B provides a multi-rotor UAV, including an even number of arms, a center disk, a landing gear and a propeller, and the arms are provided with a motor, which drives the propeller connected to the arms to rotate; the center disk includes a center disk shell, a battery and a flight control system; the center disk shell is a disk-shaped shell with a top cover and a smooth and streamlined outer surface, and a plurality of hollow connectors are provided on the side of the shell; the battery and the flight control system are built into the center disk shell, and the battery is connected to the flight control system; the landing gear includes an arch rod and two landing gear cross bars, the end of the landing gear cross bar is provided with a clamping position, the end of the arch rod is provided with a mounting hole, and a clamping groove is provided in the side wall of the mounting hole, and the clamping positions of the two landing gear cross bars are respectively matched and locked with the clamping grooves corresponding to the arch rod; the UAV solves the problems of low mold repair efficiency and high processing cost in the prior art.

[0004] However, despite the significant progress in drone technology, the design of its landing gear still has some limitations. At present, the landing gear of drones is supported by two side-by-side support rods, but the position of the support rods is fixed and cannot be adjusted, which limits the operation of drones to flat ground. In complex terrain conditions, such as rugged mountains or uneven roads, the landing gear often cannot provide the necessary stability, which makes the drone prone to overturning or damage during takeoff and landing, thus affecting its use effect and safety. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a multi-point contact adjustable UAV landing gear to solve the technical problem that the UAV landing gear in the prior art cannot provide the necessary stability in complex terrain, causing the UAV to easily overturn or be damaged during take-off and landing, affecting the use effect and safety.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an adjustable multi-point contact UAV landing gear, comprising: a plurality of support legs, an adjustment unit and a plurality of grounding frames, wherein the plurality of support legs are used to be hinged to the bottom of the UAV shell and can rotate around the UAV shell to adjust the contact angle with the ground; the adjustment unit is connected to the plurality of support legs and is used to drive the support legs to rotate; the plurality of grounding frames are respectively arranged at the bottom ends of the plurality of support legs in a one-to-one correspondence, each grounding frame is equipped with a plurality of adjustable contact parts, each of the contact parts is elastically connected to the bottom of the support leg, and can be adjusted according to the actual landing surface conditions to adapt to various irregular landing surfaces.

[0007] In some embodiments, each of the support legs includes a plurality of telescopic sections and a plurality of shock absorbers, the plurality of telescopic sections are connected in sequence, and the plurality of shock absorbers are respectively arranged between two adjacent telescopic sections to absorb the impact force generated by the landing gear during landing.

[0008] In some embodiments, the several telescopic sections of the support leg respectively include a mounting rod, a first movable rod and a second movable rod, one end of the mounting rod is rotatably connected to the drone shell, and the other end thereof is provided with a first buffer groove, one end of the first movable rod is slidably connected to the buffer groove, and the other end thereof is provided with a second buffer groove, and one end of the second movable rod is slidably connected to the second buffer groove.

[0009] In some embodiments, the mounting rod, the first movable rod and the second movable rod are all designed to be arc-shaped structures.

[0010] In some embodiments, the shock absorber includes a first spring and a damping telescopic rod, both ends of the first spring and the damping telescopic rod are respectively connected to the two ends of the two adjacent telescopic sections, the first spring is used to store energy and provide restoring force, when subjected to the impact force generated during landing, the first spring will be compressed and return to its original state after the external force is removed, and the damping telescopic rod is used to absorb and dissipate energy through internal damping to control the slow release of the first spring.

[0011] In some embodiments, the adjustment unit includes a plurality of driving members respectively connected to the supporting legs, each of the driving members includes a connecting frame, a slide plate, a screw and a driving motor, the connecting frame is connected to the supporting leg, the slide plate is movably arranged on the connecting frame, the screw rod passes through the slide plate and is threadedly connected to the slide plate, the driving end of the driving motor is connected to the screw rod, and is used to drive the screw rod to rotate, so as to drive the slide plate to move up and down through the rotation of the screw rod, and then drive the supporting leg to rotate through the connecting frame.

[0012] In some embodiments, a sliding groove is opened in the middle of the connecting frame, and the groove walls on both sides of the sliding groove are opened with limiting slides extending along the length direction of the sliding groove. The slide plate is arranged in the sliding groove, and there is a limiting sliding block on each side thereof, and the limiting sliding block can slide and rotate in the limiting slide.

[0013] In some embodiments, the contact portion of the grounding frame includes a support rod, and the grounding frame also includes a mounting seat. Several support rods are evenly arranged around the outer side of the mounting seat, and their top ends are rotatably connected to the mounting seat, and their bottom ends form support ends for supporting on the ground.

[0014] In some embodiments, mounting grooves are provided on the circumferential sides of the mounting seat at positions corresponding to the support rod, the top end of the support rod is embedded in the mounting groove, and is rotatably connected to the groove walls on both sides of the mounting groove through a rotating shaft, so that the bottom end of the support rod can swing up and down to a limited extent when it contacts the ground; the top end of the support rod also has a connecting portion extending toward the center of the mounting seat, and the connecting portion is connected to the groove wall of the mounting groove through a second spring. When the bottom end of the support rod leaves the ground, the support rod can automatically reset under the action of the second spring force.

[0015] In some embodiments, the support end is provided with a roller or a rubber pad.

[0016] Compared with the prior art, the multi-point contact adjustable UAV landing gear provided by the present invention is designed with multiple support legs by setting a plurality of support legs, adjustment units and a plurality of ground frames. The support legs are used to be hinged to the bottom of the UAV shell and can be flexibly rotated around the UAV shell to adjust the contact angle with the ground to adapt to different landing environments. In order to achieve the adjustment of the support legs, an adjustment unit is also provided. The adjustment unit is connected to the plurality of support legs and is used to drive these support legs to rotate precisely, so that the UAV can land stably on various complex terrains. In order to further improve the adaptability of the UAV, a grounding frame is set at the bottom of each support leg. Each grounding frame is equipped with multiple adjustable contact parts. These contact parts are distributed around the bottom of the support leg and can be finely adjusted according to the actual landing surface conditions, so that the UAV can adapt to various irregular landing surfaces, whether it is rugged mountains, soft sand or slippery mud, it can achieve a smooth landing. The landing gear design of the UAV can provide the necessary stability in complex terrain and effectively prevent overturning or damage during takeoff and landing, thereby improving its use efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the three-dimensional structure of the adjustable multi-point contact UAV landing gear after installation provided by an embodiment of the present invention; Figure 2 1 is a schematic diagram of the three-dimensional structure of an adjustable multi-point contact UAV landing gear provided by an embodiment of the present invention; Figure 3 1 is a schematic diagram of the upward structural surface of the adjustable multi-point contact UAV landing gear provided by an embodiment of the present invention; Figure 4 1 is a schematic diagram of the main structural view of an adjustable multi-point contact UAV landing gear provided by an embodiment of the present invention; Figure 5 It is a cross-sectional structural schematic diagram of the installation of the support legs of the adjustable multi-point contact UAV landing gear provided by an embodiment of the present invention; Figure 6 yes Figure 5 Enlarged view of point A in the middle; Figure 7 The invention is a schematic cross-sectional structural diagram of a grounding frame of an adjustable multi-point contact UAV landing gear provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Support leg; 11. Telescopic section; 111. Mounting rod; 112. First movable rod; 113. Second movable rod; 114. First buffer groove; 115. Second buffer groove; 12. Shock absorber; 121. First spring; 122. Damping telescopic rod; 2. Adjustment unit; 21. Connecting frame; 22. Slide plate; 23. Screw rod; 24. Driving motor; 3. Grounding frame; 31. Support rod; 32. Mounting seat; 33. Mounting slot; 34. Connecting part; 35. Second spring; 36. Limiting block. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that the UAV landing gear cannot provide the necessary stability in complex terrain, which causes the UAV to easily overturn or be damaged during take-off and landing, thus affecting the use effect and safety, the present invention provides a multi-point contact adjustable UAV landing gear. The UAV landing gear design can provide the necessary stability in complex terrain, effectively prevent overturning or damage during take-off and landing, thereby improving the use efficiency and safety.

[0021] See also Figures 1 to 4The adjustable multi-point contact UAV landing gear includes: a plurality of support legs 1, an adjustment unit 2 and a plurality of grounding frames 3, wherein the plurality of support legs 1 are used to be hinged at the bottom of the UAV shell, and can rotate around the UAV shell to adjust the contact angle with the ground; the adjustment unit 2 is connected to the plurality of support legs 1, and is used to drive the support legs 1 to rotate; the plurality of grounding frames 3 are respectively arranged at the bottom ends of the plurality of support legs 1 in a one-to-one correspondence, and each grounding frame 3 is equipped with a plurality of adjustable contact portions, each of which is elastically connected to the bottom of the support leg, and can be adjusted according to the actual landing surface conditions to adapt to various irregular landing surfaces.

[0022] In this solution, a plurality of support legs 1 are designed. The support legs 1 are used to be hinged at the bottom of the drone shell and can be flexibly rotated around the drone shell to adjust the contact angle with the ground to adapt to different landing environments. In order to adjust the support legs 1, an adjustment unit 2 is also provided. The adjustment unit 2 is connected to the plurality of support legs 1 and is used to drive the support legs 1 to rotate accurately, so that the drone can land stably on various complex terrains. In order to further improve the adaptability of the drone, a grounding frame 3 is provided at the bottom end of each support leg 1. Each grounding frame 3 is equipped with a plurality of adjustable contact parts. These contact parts are distributed around the bottom of the support leg 1 and can be finely adjusted according to the actual landing surface conditions, so that the drone can adapt to various irregular landing surfaces, whether it is on rugged mountains, soft sand or slippery mud, it can achieve a smooth landing.

[0023] Please note that Figure 2 In this solution, multiple support legs 1 are arranged in a circular array under the drone. The layout of the circular array allows the drone to have better balance during takeoff and landing. The independent rotation ability of each support leg 1 allows the drone to make fine adjustments on uneven terrain to keep the fuselage level. In addition, the circular layout of the support legs 1 also reduces the reliance on a single support point, thereby reducing the risk of tilting due to uneven ground settlement.

[0024] See also Figures 1 to 5 In this embodiment, each of the supporting legs 1 includes a plurality of telescopic sections 11 and a plurality of shock absorbers 12, the plurality of telescopic sections 11 are connected in sequence, and the plurality of shock absorbers 12 are respectively arranged between two adjacent telescopic sections 11. During the actual landing process, when the landing gear contacts the ground, the impact force is transmitted to the shock absorber 12 through the telescopic section 11, and is absorbed and dispersed by the shock absorber 12, so as to improve the stability and durability of the entire landing gear system.

[0025] See also Figure 5In one specific embodiment, the plurality of telescopic sections 11 of the support leg 1 are respectively composed of a mounting rod 111, a first movable rod 112 and a second movable rod 113. Specifically, one end of the mounting rod 111 is connected to the drone housing by rotation, and the other end is designed with a first buffer groove 114, and one end of the first movable rod 112 is connected to the first buffer groove 114 of the mounting rod 111 by sliding, so that the first movable rod 112 can perform corresponding telescopic movement along the mounting rod 111. In addition, the other end of the first movable rod 112 is also designed with a second buffer groove 115, and one end of the second movable rod 113 is connected to the second buffer groove 115 of the first movable rod 112 by sliding, so that the second movable rod 113 can perform corresponding telescopic movement on the first movable rod 112. The mounting rod 111, the first movable rod 112 and the second movable rod 113 can cooperate with the shock absorber 12, and the shock absorber 12 effectively absorbs and disperses the impact force generated during the landing process, thereby ensuring the stability and reliability of the support leg 1 during the telescopic process.

[0026] Furthermore, in some embodiments, the mounting rod 111, the first movable rod 112 and the second movable rod 113 are all designed as arc structures. The arc design allows the support leg 1 to absorb impact forces in more directions by telescopic deformation during landing, thereby reducing the impact on the main structure of the drone.

[0027] See also Figure 6 In one specific embodiment, the vibration damping member 12 includes a first spring 121 and a damping telescopic rod 122. The first spring 121 and the damping telescopic rod 122 complement each other in function and work together to achieve a vibration reduction effect. Specifically, both ends of the first spring 121 and the damping telescopic rod 122 are respectively connected to the two ends of the two adjacent telescopic sections 11. The main function of the first spring 121 is to store energy and provide a restoring force. It can be compressed and deformed under the impact force generated during landing. After the external force is removed, the first spring 121 can quickly return to its original shape, thereby achieving a rapid recovery action. The damping telescopic rod 122 absorbs and dissipates energy through its internal damping mechanism. It can effectively control the release speed of the first spring 121 and prevent secondary impact caused by the rapid release of the spring, thereby ensuring the stability and safety of the entire vibration reduction process. Through this design, the vibration damping member 12 can more accurately control the impact force during landing and reduce damage to equipment or structures.

[0028] Specifically, each supporting leg 1 is provided with two shock absorbing members 12, wherein one set of first springs 121 and damping telescopic rods 122 are respectively connected to the mounting rod 111 and the first movable rod 112, and another set of first springs 121 and damping telescopic rods 122 are respectively connected to the first movable rod 112 and the second movable rod 113.

[0029] It should be noted that the damping telescopic rod 122 is a telescopic rod that achieves damping effect through hydraulic pressure or pneumatic pressure. The hydraulic telescopic rod uses hydraulic oil as the damping medium and achieves the damping effect by adjusting the flow of the hydraulic oil. The pneumatic telescopic rod uses compressed air as the damping medium and relies on the compression and expansion of the gas to produce the damping effect.

[0030] See also Figures 1 to 5 In this embodiment, the adjustment unit 2 includes a plurality of driving members respectively connected to the support legs 1, and the number of the driving members is exactly the same as the number of the support legs 1 to ensure that each support leg 1 can be independently and accurately controlled. Each of the driving members includes a connecting frame 21, a slide plate 22, a screw 23 and a driving motor 24.

[0031] The connecting frame 21 is fixedly connected to the supporting leg 1 and is disposed on the inner side of the supporting leg 1 . By controlling the position of the connecting frame 21 , the angle of the supporting leg 1 can be adjusted. The slide plate 22 is movably arranged on the connecting frame 21, and its mobility allows the slide plate 22 to perform necessary sliding and rotation adjustments. Specifically, its connection method is: a sliding groove is provided in the middle of the connecting frame 21, and the groove walls on both sides of the sliding groove are provided with limiting slides extending along the length direction of the sliding groove. The slide plate 22 is arranged in the sliding groove, and the limiting slides provide precise guidance and limitation for the movement of the slide plate 22 to prevent the slide plate 22 from offsetting or derailing during movement, and there is a limiting slider on each side of the slide plate 22, and the limiting slider can slide and rotate in the limiting slide. When the support leg 1 is adjusted to rotate downward, the connecting frame 21 needs to be driven to rotate upward by the screw rod 23. At this time, the slide plate 22 can slide outward in the sliding groove to adapt to the connection between the screw rod 23 and the connecting frame 21; when the support leg 1 is adjusted to rotate upward, the connecting frame 21 needs to be driven to rotate downward by the screw rod 23. At this time, the slide plate 22 can slide inward in the sliding groove to adapt to the connection between the screw rod 23 and the connecting frame 21. The screw rod 23 passes through the slide plate 22 and is threadedly connected to the slide plate 22, so that the rotation of the screw rod 23 can be directly converted into the up and down movement of the slide plate 22. The driving motor 24 serves as the power source of the adjustment unit 2, and its driving end is connected to the screw rod 23, which is used to drive the screw rod 23 to rotate. When the driving motor 24 is started and rotated, the screw rod 23 rotates accordingly, thereby driving the slide plate 22 to perform precise up and down movement. Since the slide plate 22 is connected to the connecting frame 21, the movement of the slide plate 22 will eventually be converted into the rotation of the support leg 1, thereby achieving the angle adjustment of the support leg 1.

[0032] See also Figures 1 to 7In this embodiment, the contact portion of the grounding frame 3 includes a support rod 31, and the grounding frame 3 also includes a mounting seat 32. Several support rods 31 are evenly arranged around the outer side of the mounting seat 32, and the top ends thereof are rotatably connected to the mounting seat 32, and the bottom ends form support ends for supporting on the ground.

[0033] In one of the specific embodiments, mounting grooves 33 are provided on the circumferential sides of the mounting seat 32 at positions corresponding to the support rod 31, and the top end of the support rod 31 is embedded in the mounting groove 33 and is rotatably connected to the groove walls on both sides of the mounting groove 33 through a rotating shaft, so that the bottom end of the support rod 31 can swing up and down to a limited extent when it contacts the ground, thereby providing a certain degree of flexibility and adaptability; the top end of the support rod 31 also has a connecting portion 34 extending toward the center of the mounting seat 32, and the bottom surface of the connecting portion 34 is connected to the groove wall of the mounting groove 33 through a second spring 35. When the bottom end of the support rod 31 touches the ground, if the ground is uneven, the bottom end of the support rod 31 will rotate upward after contacting the ground, thereby causing the second spring 35 to be compressed. When the bottom end of the support rod 31 leaves the ground, the support rod 31 can automatically return to its initial position under the action of the second spring 35. In addition, a limit block 36 is provided on one side of each second spring 35. The limit block 36 is located at the bottom of the top end of the support rod 31 and is used to limit the upward rotation range of the support rod 31, thereby ensuring the stability and reliability of the support rod 31 during use.

[0034] Furthermore, in order to further enhance the adaptability of the drone in complex terrain, in some embodiments, rollers, spikes or rubber pads are provided at the support end. On sandy or muddy ground, the contact portion can be adjusted to a longer spike to increase the support area and penetration; on hard ground, the contact portion can be adjusted to a roller or rubber pad. The design of the roller can not only reduce the friction between the support rod 31 and the ground, but also improve the flexibility of the drone moving on the hard ground, making the movement of the support rod 31 on the hard ground smoother, while the rubber pad can provide additional grip to prevent the drone from sliding during movement.

[0035] It should be noted that, in some embodiments, the adjustment unit 2 is usually controlled by an electronic control system, which can automatically adjust the length of the support leg 1 and the contact portion of the grounding frame 3 according to the flight data of the drone and the feedback information of the landing environment. The automated design not only improves the landing accuracy of the drone, but also greatly reduces the burden on the operator, so that the drone can achieve fast and safe landing in various environments.

[0036] The present invention designs a plurality of support legs 1 by providing a plurality of support legs 1, an adjustment unit 2 and a plurality of ground frames 3. The support legs 1 are used to be hinged to the bottom of the drone shell and can be flexibly rotated around the drone shell to adjust the contact angle with the ground to adapt to different landing environments. In order to achieve the adjustment of the support legs 1, an adjustment unit 2 is also provided. The adjustment unit 2 is connected to the plurality of support legs 1 and is used to drive these support legs 1 to rotate precisely, so that the drone can land stably on various complex terrains. In order to further improve the adaptability of the UAV, a grounding frame 3 is respectively arranged at the bottom end of each supporting leg 1, and each grounding frame 3 is equipped with a plurality of adjustable contact parts, which are distributed around the bottom of the supporting leg 1 and can be finely adjusted according to the actual landing surface conditions, so that the UAV can adapt to various irregular landing surfaces, and can achieve a smooth landing whether on rugged mountains, soft sand or slippery mud. The landing gear design of the UAV can provide the necessary stability in complex terrain, effectively prevent overturning or damage during take-off and landing, thereby improving the use efficiency and safety.

[0037] In the description of the present application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0039] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A multi-point contact adjustable UAV landing gear, characterized in that: include: A plurality of support legs, wherein the plurality of support legs are used to be hinged to the bottom of the drone housing; An adjusting unit, the adjusting unit being connected to a plurality of the supporting legs and being used for driving the supporting legs to rotate; as well as, A plurality of grounding frames are respectively arranged at the bottom ends of the plurality of supporting legs in a one-to-one correspondence, each grounding frame is equipped with a plurality of adjustable contact portions, and each of the contact portions is elastically connected to the bottom of the supporting legs.

2. The adjustable multi-point contact UAV landing gear according to claim 1, characterized in that: Each of the supporting legs comprises a plurality of telescopic sections and a plurality of vibration damping members, wherein the plurality of telescopic sections are connected in sequence, and the plurality of vibration damping members are respectively arranged between two adjacent telescopic sections for absorbing the impact force generated by the landing gear during landing.

3. The adjustable multi-point contact UAV landing gear according to claim 2, characterized in that: The several telescopic sections of the supporting leg respectively include a mounting rod, a first movable rod and a second movable rod. One end of the mounting rod is rotatably connected to the drone shell, and the other end thereof is provided with a first buffer groove. One end of the first movable rod is slidably connected to the buffer groove, and the other end thereof is provided with a second buffer groove. One end of the second movable rod is slidably connected to the second buffer groove.

4. The multi-point contact adjustable UAV landing gear according to claim 3, characterized in that: The installation rod, the first movable rod and the second movable rod are all designed to be arc-shaped structures.

5. The adjustable multi-point contact UAV landing gear according to claim 2, 3 or 4, characterized in that: The shock absorber includes a first spring and a damping telescopic rod, both ends of the first spring and the damping telescopic rod are respectively connected to the two ends of the two adjacent telescopic sections, the first spring is used to store energy and provide restoring force, when subjected to the impact force generated during landing, the first spring will be compressed and return to its original state after the external force is removed, and the damping telescopic rod is used to absorb and dissipate energy through internal damping to control the slow release of the first spring.

6. The adjustable multi-point contact UAV landing gear according to claim 1, characterized in that: The adjustment unit includes a plurality of driving members respectively connected to the supporting legs, each of the driving members includes a connecting frame, a slide plate, a screw rod and a driving motor, the connecting frame is connected to the supporting leg, the slide plate is movably arranged on the connecting frame, the screw rod passes through the slide plate and is threadedly connected to the slide plate, the driving end of the driving motor is connected to the screw rod, and is used to drive the screw rod to rotate, so as to drive the slide plate to move up and down through the rotation of the screw rod, and then drive the supporting leg to rotate through the connecting frame.

7. The adjustable multi-point contact UAV landing gear according to claim 6, characterized in that: A sliding groove is provided in the middle of the connecting frame, and the groove walls on both sides of the sliding groove are provided with limiting slides extending along the length direction of the sliding groove. The slide plate is arranged in the sliding groove, and there is a limiting sliding block on each side thereof, and the limiting sliding block can slide and rotate in the limiting slide.

8. The multi-point contact adjustable UAV landing gear according to claim 1, characterized in that: The contact part of the grounding frame includes a support rod, and the grounding frame also includes a mounting seat. Several support rods are evenly arranged around the outer side of the mounting seat, the top ends of which are rotatably connected to the mounting seat, and the bottom ends form support ends for supporting on the ground.

9. The adjustable multi-point contact UAV landing gear according to claim 8, characterized in that: Mounting grooves are provided on the circumferential side of the mounting seat at positions corresponding to the support rod, the top end of the support rod is embedded in the mounting groove and is rotatably connected to the groove walls on both sides of the mounting groove through a rotating shaft, so that the bottom end of the support rod can swing up and down to a limited extent when it contacts the ground; the top end of the support rod also has a connecting portion extending toward the center of the mounting seat, the connecting portion is connected to the groove wall of the mounting groove through a second spring, and when the bottom end of the support rod leaves the ground, the support rod can automatically reset under the action of the second spring force.

10. The adjustable multi-point contact UAV landing gear according to claim 9, characterized in that: The supporting end is provided with a roller or a rubber pad.

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