Unmanned aerial vehicle undercarriage and unmanned aerial vehicle

Abstract

The unmanned aerial vehicle undercarriage comprises a vehicle body, an outer skirt frame is fixedly connected to the outer side of the bottom end of the vehicle body, a plurality of connecting holes are formed in the periphery of the top end of the outer skirt frame, vehicle arms are arranged in the connecting holes, and one ends of the vehicle arms are located at the circle centers of the connecting holes. Through the arrangement of the adjustable undercarriage, a transmission bevel gear is driven by a main bevel gear to drive a driving rod to rotate, meanwhile, a sliding block is driven by the driving rod to slide towards the opposite side or the opposite direction, and the bottom ends of supporting strips following the sliding block are opened and closed outwards or close to each other; at the moment, the supporting guide wheels installed at the bottom ends of the supporting strips roll towards the two sides or the opposite sides, so that the height of the gravity center of the unmanned aerial vehicle is adjusted according to the self weight of the unmanned aerial vehicle or the take-off and landing environment, stability of the unmanned aerial vehicle is guaranteed, and losses caused by falling of the unmanned aerial vehicle due to collision caused by too high gravity center are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a landing gear of an unmanned aerial vehicle and an unmanned aerial vehicle. Background Art

[0002] Unmanned aerial vehicles, or UAVs for short, are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by onboard computers. Compared with manned aircraft, drones are often more suitable for tasks that are too "dull, dirty or dangerous". Drones can be divided into military and civilian applications according to their application areas. In the military, drones are divided into reconnaissance aircraft and target aircraft. In the civilian sector, drones + industry applications are the real rigid demand for drones; their applications in aerial photography, agriculture, plant protection, micro selfies, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying and mapping, news reporting, power inspections, disaster relief, film and television shooting, creating romance, etc. have greatly expanded the use of drones themselves, and developed countries are also actively expanding industry applications and developing drone technology.

[0003] Reference is made to the Chinese invention patent, publication number: CN 217706257 U, title: A UAV landing gear and a UAV, the UAV landing gear comprising: a mounting seat and a support frame; the mounting seat is provided with an assembly portion and a contour portion, the contour portion is arranged at the top of the mounting seat, and its shape matches the outer shell of the UAV, and the assembly portion is used to assemble with the outer shell of the UAV; the support frame is arranged at the top of the mounting seat, and a mounting groove for mounting a charging contact piece is arranged on one side of the support frame, a guide plate is arranged at the opening of the mounting groove, and a plurality of guide through holes are arranged on the guide plate, and the guide through holes are connected to the mounting groove.

[0004] However, there are still some problems in actual use:

[0005] 1. In actual use, the drone is docked through a landing machine. Since it is supported by the four corners, the center of gravity of the drone changes when the counterweight is added. When the slope of the docking ground is uneven, it is easy to cause the drone to roll over. Secondly, when docking in a harsh environment, the wind speed can easily cause the drone body to shake, affecting takeoff.

[0006] 2. Secondly, when the drone is performing various emergency operations, its landing site cannot be cleaned in advance, and residual sand, gravel, and potholes may block the drone from taking off and landing. After landing, the drone may be easily affected by the environment because the support frames on both sides cannot ensure the stability of the drone. This limits its scope of use and is not conducive to multi-channel development and scope of use. Summary of the invention

[0007] Technical issues solved

[0008] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a UAV landing gear and a UAV.

[0009] Technical Solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an unmanned aerial vehicle, comprising a body, an outer skirt frame fixedly connected to the outer side of the bottom end of the body, a plurality of connection holes are opened around the top of the outer skirt frame, and arms are arranged inside the connection holes, one end of the arm is located at the center of the connection hole, and the other end of the arm passes through the outer skirt frame and is fixedly connected to the inside of the body, one end of the arm away from the body is fixedly connected to a propeller through a motor, the bottom end of the body is fixedly connected to a mounting cover, the internal equipment of the body includes a flight control, a balancer controller, a GPS, an electronic controller, a battery and an antenna, and the internal equipment of the body is consistent with the internal layout of a common unmanned aerial vehicle.

[0011] Through the above technical scheme, the special shape of the UAV body is utilized to reduce the control resistance and the influence on the flight control system during the flight. Secondly, its flight attitude is guaranteed, and multiple propellers are arranged and installed inside the connecting hole, which is beneficial to reduce the influence of the multi-angle control airflow on the propeller, improve the flight attitude and its stability, and enhance the take-off and landing weight of the UAV.

[0012] As mentioned above, the bottom end of the outer skirt is fixedly connected with several connecting frames, and the connecting frames are respectively located between two adjacent connecting holes, a sliding groove is horizontally opened inside the connecting frame, and the cross-section of the connecting frame is T-shaped, the interior of the connecting frame is movably connected with an adjustable landing gear, and the end of the connecting frame away from the body is fixedly connected with a terrain adaptive mechanism.

[0013] Through the above technical solution, according to the weight of the UAV or the take-off and landing environment, the tracks can be adjusted to fit the shape of the obstacle at the location as much as possible, ensuring the stability of the UAV docking, enhancing the environmental adaptability, improving the practical use, and facilitating the adjustment of the height of the center of gravity of the UAV to ensure the stability of the UAV and prevent the center of gravity from being too high and causing a collision, causing the UAV to tip over and cause losses.

[0014] As mentioned above, the adjustable landing gear includes a driving rod, a slider, a support bar and a support guide wheel. The slider is symmetrically movably connected to the outer side of the driving rod. Two support bars are provided. The two support bars are arranged in an X manner and their intersections are movably connected through a rotating shaft. The top ends of the support bars are fixedly connected to the inner side of the slider on the same side through the rotating shaft, and the support guide wheels are movably connected to the bottom ends of the support bars.

[0015] Through the above technical solution, it is helpful to adjust the height of the center of gravity of the drone according to the drone's own weight or the take-off and landing environment, thereby ensuring the stability of the drone and preventing the center of gravity from being too high and causing a collision, which may cause the drone to tip over and cause losses.

[0016] As mentioned above, a group of left-right symmetrical threads are provided on the outer side of the driving rod, and the slider is movably connected to the driving rod through the threads. The driving rod is located inside the slide groove, and one end of the driving rod is movably connected to the connecting frame through a bearing.

[0017] The above technical solution is helpful to ensure that the driving rod can control the sliding block to move in relative or opposite directions.

[0018] As mentioned above, the adjustable landing gear also includes a control motor, a main bevel gear and a transmission bevel gear. The main bevel gear is fixedly connected to the output end of the control motor. There are six transmission bevel gears. The transmission bevel gears are arranged in a ring array above the main bevel gear, and the transmission bevel gears are meshed with the main bevel gears.

[0019] The above technical solution is advantageous for controlling the rotation of drive shafts in different directions at the same time, thereby ensuring the adjustment stability.

[0020] As mentioned above, the control motor is fixedly connected to the inside of the mounting cover, and the end of the driving rod close to the body passes through the connecting frame and the mounting cover in sequence and is fixedly connected to the axis of the transmission bevel gear on the same side, and the threads opened at the same position on the outside of the driving rod connected to the transmission bevel gears symmetrically arranged are oppositely arranged, and the connection between the driving rod and the connecting frame and the mounting cover are all movably connected through bearings.

[0021] Through the above technical solution, by utilizing the fact that opposite threads are provided on the outer sides of the driving rods connected by mutually symmetrical transmission bevel gears, the movement trajectories of the sliders in different directions are consistent with each other, which is conducive to ensuring that the lifting heights of all support bars are consistent.

[0022] As mentioned above, the terrain adaptive mechanism includes a crash shell, a servo motor, a drive shaft and a track, the drive shaft is fixedly connected to the output of the servo motor, and one end of the track is wrapped around the outside of the drive shaft, the servo motor is fixedly connected to the inside of the crash shell, and the end of the drive rod away from the servo motor is movably connected to the inner wall of the crash shell through a bearing.

[0023] Through the above technical solution, the bottom crawler can fit the shape of the obstacle as much as possible, ensure the stability of the drone, enhance the environmental adaptability, and improve the practical use.

[0024] As mentioned above, a warning light is fixedly connected to the top of the anti-collision shell, and the anti-collision shell is fixedly connected to the outside of the connecting frame, and a connecting groove is opened at the bottom of the anti-collision shell.

[0025] Through the above technical solution, the warning light can send a signal to indicate the location of the drone, and prevent other drones from observing in unfavorable visual conditions, thereby preventing collisions.

[0026] As mentioned above, the end of the crawler away from the driving shaft passes through the connecting groove and is fixedly connected to the outer side of the mounting cover, and the supporting guide wheel located on the same side is tightly attached to the inner side of the crawler and supports it in an inverted U shape.

[0027] The above technical solution is helpful to adjust the track contact area and the machine body stability.

[0028] Beneficial effects:

[0029] Compared with the prior art, the UAV landing gear and the UAV have the following beneficial effects:

[0030] 1. The present invention provides an adjustable landing gear, and utilizes a control motor to drive the main bevel gear to rotate. At this time, the transmission bevel gear is driven by the main bevel gear to drive the driving rod to rotate, and at the same time, the slider is driven by the driving rod to slide to the opposite side or in the opposite direction. Since the outer sides of the driving rods connected to the mutually symmetrical transmission bevel gears are provided with opposite threads, the movement trajectories of the sliders in different directions are consistent with each other. At the same time, the top end of the support bar is driven by the sliding, and the bottom end of the support bar followed by it opens and closes outward or approaches each other. At this time, the support guide wheel installed at the bottom end of the support bar rolls to both sides or to the opposite side, which is beneficial to adjust the height of the center of gravity of the drone according to the weight of the drone or the take-off and landing environment, thereby ensuring the stability of the drone and preventing the center of gravity from being too high and colliding, causing the drone to tip over and cause losses.

[0031] 2. The present invention sets up a terrain adaptive mechanism. When the supporting guide wheel rolls in the opposite direction, the servo motor drives the drive shaft to rotate counterclockwise, wrapping around its outer crawler and extending outward. At this time, the crawler contact surface area gradually increases. Conversely, when the supporting guide wheel rolls to the opposite side, the servo motor drives the drive shaft to rotate clockwise, wrapping around its outer crawler and rotating inward for collection. At this time, the crawler contact surface area gradually decreases. At the same time, when the UAV is parked on gravel or bumpy ground, the servo motor drives the drive shaft to rotate counterclockwise to increase the speed, which is conducive to the bottom crawler to fit the shape of the obstacle as much as possible, ensuring the stability of the UAV docking, enhancing environmental adaptability, and improving practical use.

[0032] 3. The present invention reduces the control resistance and the influence on the flight control system during flight by setting up a special shape of the UAV body, and secondly ensures its flight attitude. A plurality of propellers are set and installed inside the connecting hole, which is beneficial to reduce the influence of the multi-angle control airflow on the propeller, improve the flight attitude and its stability, and enhance the take-off and landing weight of the UAV.

[0033] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 It is a top view of the three-dimensional structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the bottom connection structure of the machine body of the present invention;

[0037] Figure 4 It is a schematic diagram of the cross-sectional connection structure of the connecting frame of the present invention;

[0038] Figure 5 It is a schematic diagram of the adjustable landing gear connection structure of the present invention;

[0039] Figure 6 It is a schematic diagram of the main bevel gear connection structure of the present invention;

[0040] Figure 7 A schematic diagram of the connection structure of the terrain adaptive mechanism of the present invention;

[0041] Figure 8 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0042] In the figure: 1. body; 2. outer skirt; 3. connecting hole; 4. machine arm; 5. propeller; 6. mounting cover; 7. connecting frame; 8. slide groove; 9. adjustable landing gear; 901. driving rod; 902. sliding block; 903. supporting bar; 904. supporting guide wheel; 905. control motor; 906. main bevel gear; 907. transmission bevel gear; 10. terrain adaptive mechanism; 1001. anti-collision shell; 1002. servo motor; 1003. driving shaft; 1004. crawler track; 11. warning light; 12. connecting groove. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1-3As shown, the present invention provides a technical solution: an unmanned aerial vehicle, comprising a body 1, an outer skirt frame 2 is fixedly connected to the outer side of the bottom end of the body 1, a plurality of connection holes 3 are opened around the top of the outer skirt frame 2, and arms 4 are arranged inside the connection holes 3, one end of the arm 4 is located at the center of the connection hole 3, and the other end of the arm 4 passes through the outer skirt frame 2 and is fixedly connected to the inside of the body 1, one end of the arm 4 away from the body 1 is fixedly connected to a propeller 5 through a motor, the bottom end of the body 1 is fixedly connected to a mounting cover 6, the internal devices of the body 1 include a flight control, a balancer controller, a GPS, an electronic controller, a battery and an antenna, and the internal devices of the body 1 are consistent with the internal layout of common unmanned aerial vehicles.

[0045] The specially shaped UAV body 1 can reduce control resistance and influence on the flight control system during flight, and secondly, ensure its flight attitude. A plurality of propellers 5 are arranged and installed inside the connecting hole 3, which is beneficial to reduce the influence of multi-angle control airflow on the propeller 5, improve the flight attitude and its stability, and enhance the take-off and landing weight of the UAV.

[0046] like Figure 1-8As shown, a UAV landing gear, the bottom end of the outer skirt 2 is fixedly connected with several connecting frames 7, and the connecting frames 7 are respectively located between two adjacent connecting holes 3, a sliding groove 8 is transversely opened inside the connecting frame 7, and the cross-section of the connecting frame 7 is T-shaped, and an adjustable landing gear 9 is movably connected inside the connecting frame 7, and the end of the connecting frame 7 away from the body 1 is fixedly connected with a terrain adaptive mechanism 10, and the adjustable landing gear 9 includes a driving rod 901, a slider 902, a support bar 903 and a support guide wheel 904, the slider 902 is symmetrically connected to the outside of the driving rod 901, two support bars 903 are provided, the two support bars 903 are arranged in an X manner and are movably connected at the intersection through a rotating shaft, the top ends of the support bars 903 are respectively fixedly connected to the inner side of the slider 902 on the same side through the rotating shaft, and the support guide wheels 904 are respectively movably connected to the bottom ends of the support bars 903, a group of left-right symmetrical threads are opened on the outside of the driving rod 901, and the slider 902 The adjustable landing gear 9 further comprises a control motor 905, a main bevel gear 906 and a transmission bevel gear 907. The main bevel gear 906 is fixedly connected to the output end of the control motor 905. There are six transmission bevel gears 907. The transmission bevel gears 907 are arranged above the main bevel gears 906 in an annular array. The transmission bevel gears 907 and the main bevel gears 906 are meshed with each other. The control motor 905 is fixedly connected to the inside of the mounting cover 6. The end of the drive rod 901 close to the body 1 sequentially passes through the connecting frame 7 and the mounting cover 6 and is fixedly connected to the axis of the transmission bevel gear 907 on the same side. The threads at the same position on the outside of the drive rod 901 connected to the transmission bevel gears 907 symmetrically arranged are arranged in opposite directions. The connection between the drive rod 901 and the connecting frame 7 and the mounting cover 6 is movably connected through bearings.

[0047] The main bevel gear 906 is driven to rotate by controlling the motor 905. At this time, the transmission bevel gear 907 is driven by the main bevel gear 906 to drive the driving rod 901 to rotate. At the same time, the slider 902 is driven by the driving rod 901 to slide to the opposite side or in the opposite direction. Since the outer side of the driving rod 901 connected by the mutually symmetrical transmission bevel gears 907 has opposite threads, the movement trajectories of the sliders 902 in different directions are consistent with each other. At the same time, the top of the support bar 903 is driven by sliding, and the bottom end of the support bar 903 followed by it opens and closes outward or approaches each other. At this time, the support guide wheel 904 installed at the bottom end of the support bar 903 rolls to both sides or to the opposite side, which is beneficial to adjust the height of the center of gravity of the drone according to the drone's own weight or take-off and landing environment, ensure the stability of the drone, and prevent the center of gravity from being too high and colliding, causing the drone to tip over and cause losses.

[0048] like Figure 3 , Figure 4, Figure 7 and Figure 8 As shown, the terrain adaptive mechanism 10 includes an anti-collision shell 1001, a servo motor 1002, a drive shaft 1003 and a crawler track 1004, the drive shaft 1003 is fixedly connected to the output of the servo motor 1002, and one end of the crawler track 1004 is wound around the outside of the drive shaft 1003, the servo motor 1002 is fixedly connected to the inside of the anti-collision shell 1001, and the end of the drive rod 901 away from the servo motor 1002 is movably connected to the inner wall of the anti-collision shell 1001 through a bearing, the top of the anti-collision shell 1001 is fixedly connected with a warning light 11, and the anti-collision shell 1001 is fixedly connected to the outside of the connecting frame 7, and a connecting groove 12 is provided at the bottom end of the anti-collision shell 1001, and the end of the crawler track 1004 away from the drive shaft 1003 passes through the connecting groove 12 and is fixedly connected to the outside of the mounting cover 6, and the support guide wheel 904 on the same side is close to the inner side of the crawler track 1004 and supports it in an inverted U shape.

[0049] When the supporting guide wheel 904 rolls in the opposite direction, the servo motor 1002 drives the drive shaft 1003 to rotate counterclockwise, and the track 1004 on the outside is extended outward. At this time, the contact area of ​​the track 1004 gradually increases. Conversely, when the supporting guide wheel 904 rolls to the opposite side, the servo motor 1002 drives the drive shaft 1003 to rotate clockwise, and the track 1004 on the outside is rotated inward for collection. At this time, the contact area of ​​the track 1004 gradually decreases. At the same time, because the UAV is parked on gravel or potholes on the ground, the servo motor 1002 drives the drive shaft 1003 to rotate counterclockwise to increase the rotation speed, which is conducive to the bottom track 1004 to fit the shape of the obstacle as much as possible, ensure the stability of the UAV docking, enhance the environmental adaptability, and improve the actual use range.

[0050] Working principle: The main bevel gear 906 is driven to rotate by the control motor 905. At this time, the transmission bevel gear 907 is driven by the main bevel gear 906 to drive the driving rod 901 to rotate. At the same time, the slider 902 is driven by the driving rod 901 to slide to the opposite side or in the opposite direction. Since the outer sides of the driving rods 901 connected by the mutually symmetrical transmission bevel gears 907 have opposite threads, the movement trajectories of the sliders 902 in different directions are consistent with each other. At the same time, the top of the support bar 903 is driven by the sliding, and the bottom end of the support bar 903 followed by it opens and closes outwards or approaches each other. At this time, the support guide wheel 904 installed at the bottom end of the support bar 903 rolls to both sides or to the opposite side. When the support guide wheel 904 When rolling in the opposite direction, the servo motor 1002 drives the drive shaft 1003 to rotate counterclockwise, wrapping around its outer track 1004 and extending outward. At this time, the contact area of ​​the track 1004 gradually increases. Conversely, when the supporting guide wheel 904 rolls to the opposite side, the servo motor 1002 drives the drive shaft 1003 to rotate clockwise, wrapping around its outer track 1004 and rotating inward to collect. At this time, the contact area of ​​the track 1004 gradually decreases. At the same time, because the UAV is parked on gravel or bumpy ground, the servo motor 1002 drives the drive shaft 1003 to rotate counterclockwise to increase the rotation speed, so that the track 1004 at the bottom end on both sides of the supporting guide wheel 904 can fit the shape of the obstacle as much as possible, thereby ensuring the stability of the UAV docking.

[0051] It should be noted that, in this article, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 invention; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An unmanned aerial vehicle, comprising a body (1), characterized in that: The outer side of the bottom end of the body (1) is fixedly connected to an outer skirt frame (2), a plurality of connection holes (3) are opened around the top of the outer skirt frame (2), and an arm (4) is arranged inside the connection hole (3), one end of the arm (4) is located at the center of the connection hole (3), and the other end of the arm (4) passes through the outer skirt frame (2) and is fixedly connected to the inside of the body (1), the end of the arm (4) away from the body (1) is fixedly connected to a propeller (5) through a motor, and the bottom end of the body (1) is fixedly connected to a mounting cover (6), and the internal equipment of the body (1) includes a flight control, a balancer controller, a GPS, an electronic controller, a battery and an antenna, and the internal equipment of the body (1) is consistent with the internal layout of a common unmanned aerial vehicle.

2. A UAV landing gear, using the UAV according to claim 1, characterized in that: The bottom end of the outer skirt (2) is fixedly connected to a plurality of connecting frames (7), and the connecting frames (7) are respectively located between two adjacent connecting holes (3). A sliding groove (8) is transversely provided inside the connecting frame (7), and the cross section of the connecting frame (7) is T-shaped. An adjustable landing gear (9) is movably connected inside the connecting frame (7), and one end of the connecting frame (7) away from the body (1) is fixedly connected to a terrain adaptive mechanism (10).

3. The UAV landing gear according to claim 2, characterized in that: The adjustable landing gear (9) comprises a driving rod (901), a slider (902), a support bar (903) and a support guide wheel (904); the slider (902) is symmetrically connected to the outer side of the driving rod (901); two support bars (903) are provided; the two support bars (903) are arranged in an X-shape and are movably connected at their intersections via a rotating shaft; the top ends of the support bars (903) are respectively fixedly connected to the inner side of the slider (902) on the same side via a rotating shaft, and the support guide wheels (904) are respectively movably connected to the bottom ends of the support bars (903).

4. The UAV landing gear according to claim 3, characterized in that: A group of left-right symmetrical threads are provided on the outer side of the driving rod (901), and the slider (902) is movably connected to the driving rod (901) via the threads. The driving rod (901) is located inside the slide groove (8), and one end of the driving rod (901) is movably connected to the connecting frame (7) via a bearing.

5. The UAV landing gear according to claim 3, characterized in that: The adjustable landing gear (9) further comprises a control motor (905), a main bevel gear (906) and a transmission bevel gear (907), wherein the main bevel gear (906) is fixedly connected to the output end of the control motor (905), and six transmission bevel gears (907) are provided. The transmission bevel gears (907) are arranged in a ring array above the main bevel gear (906), and the transmission bevel gears (907) and the main bevel gears (906) are meshed with each other.

6. The UAV landing gear according to claim 5, characterized in that: The control motor (905) is fixedly connected to the inside of the mounting cover (6), and the end of the driving rod (901) close to the body (1) passes through the connecting frame (7) and the mounting cover (6) in sequence and is fixedly connected to the axis of the transmission bevel gear (907) on the same side, and the threads opened at the same position on the outside of the driving rod (901) connected to the transmission bevel gears (907) arranged symmetrically are arranged in opposite directions, and the connection between the driving rod (901) and the connecting frame (7) and the mounting cover (6) are all movably connected through bearings.

7. The UAV landing gear according to claim 2, characterized in that: The terrain adaptive mechanism (10) comprises a crash shell (1001), a servo motor (1002), a drive shaft (1003) and a crawler track (1004); the drive shaft (1003) is fixedly connected to the output of the servo motor (1002), and one end of the crawler track (1004) is wound around the outside of the drive shaft (1003); the servo motor (1002) is fixedly connected to the inside of the crash shell (1001), and one end of the drive rod (901) away from the servo motor (1002) is movably connected to the inner wall of the crash shell (1001) through a bearing.

8. The UAV landing gear according to claim 7, characterized in that: A warning light (11) is fixedly connected to the top of the anti-collision shell (1001), and the anti-collision shell (1001) is fixedly connected to the outside of the connecting frame (7). A connecting groove (12) is provided at the bottom of the anti-collision shell (1001).

9. The UAV landing gear according to claim 7, characterized in that: The end of the crawler (1004) away from the drive shaft (1003) passes through the connecting groove (12) and is fixedly connected to the outer side of the mounting cover (6). The supporting guide wheel (904) located on the same side is tightly attached to the inner side of the crawler (1004) and supports it in an inverted U shape.

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