Multifunctional unmanned aerial vehicle undercarriage

Abstract

The invention discloses a multifunctional unmanned aerial vehicle undercarriage, and relates to the technical field of undercarriages, the multifunctional unmanned aerial vehicle undercarriage comprises an electric telescopic rod, and the electric telescopic rod is used for driving to realize one-key folding. According to the multifunctional unmanned aerial vehicle undercarriage, an electric telescopic rod is controlled to be started to extend, so that the distance between a first reinforcing frame and a second reinforcing frame becomes far, the included angle between a first connecting rod and a second connecting rod is increased after the distance becomes far, and at the moment, one end of the second connecting rod drives a fifth connecting rod to be lifted upwards; meanwhile, a third connecting rod and a second connecting rod are in a parallel state, the third connecting rod can drive a fifth connecting rod to rotate along with rotation of the first connecting rod, and a fourth connecting rod and the fifth connecting rod are in a parallel state, so that the rotation angle of a sixth connecting rod is the same as that of the second connecting rod; the first connecting rod, the third connecting rod, the fifth connecting rod, the fourth connecting rod and the sixth connecting rod are folded to be close to the electric telescopic rod, and finally one-key folding is completed.

Description

Technical Field

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

[0002] During the landing process of a drone, the landing gear can absorb and cushion the impact force generated during landing. When a drone lands from the air, it has a certain vertical speed and will generate a large impact force when it contacts the ground. The landing gear is usually equipped with shock absorbing devices, such as shock absorbing springs or shock absorbing rubber. The most basic function of a drone landing gear is to support the body of the drone before takeoff and after landing.

[0003] In the prior art, for example, in the Chinese patent publication number: CN113859519A, a landing gear and a drone are disclosed. The landing gear includes a lifting mechanism and a shock absorbing mechanism. When encountering a larger obstacle, the push rod changes the distance between the second connecting plate and the first connecting plate, raises the drone body, avoids the larger obstacle on the road, and prevents the drone from tipping over. When encountering a smaller obstacle, the drone body vibrates, the second connecting plate moves downward, and the mounting brackets of the two rollers rotate in the direction close to the second connecting plate, the length of the first piston rod is shortened, and the mounting brackets of the two rollers and the second connecting plate squeeze the spring to achieve flexible buffering, and the drone basically does not rebound.

[0004] However, in the prior art, the landing gear of the UAV is in a fully unfolded state, which occupies a large space. It cannot be folded with one button, whether during the flight of the UAV or when the landing gear is stored. During the flight, the landing gear will increase the vertical volume, and the UAV will be restricted when passing through a narrow space. When storing, some of the landing gear legs cannot be folded, and some need to be disassembled and folded, which will increase the process and waste time, thus lacking convenience.

[0005] So we proposed a multifunctional UAV landing gear to solve the problems raised above. Summary of the invention

[0006] The purpose of the present invention is to provide a multifunctional UAV landing gear to solve the problem raised in the above background technology that the current UAV landing gear cannot be folded with one button and thus lacks convenience when flying and storing.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multifunctional UAV landing gear, comprising an electric telescopic rod, and the electric telescopic rod is used to drive and realize one-key folding, the top end of the electric telescopic rod is fixedly connected to a fixed block, the bottom end of the electric telescopic rod is fixedly connected to a connecting block, a support assembly is fixedly connected between the bottom of the fixed block and the top of the connecting block, and the support assembly is provided with four, and the support assembly includes a first reinforcement frame and a second reinforcement frame, a first connecting rod is rotatably connected between the inner walls of the first reinforcement frame, a second connecting rod is rotatably connected between the inner walls of the second reinforcement frame, and both sides of the first connecting rod are fixedly connected to a first fixed shaft, A third connecting rod is rotatably connected between the outsides of the two first fixed shafts, and the second fixed shaft is fixedly connected to the outer surfaces of both sides of the second connecting rod, one end of the first connecting rod is rotatably connected to the outside of the corresponding second fixed shaft, and the third fixed shaft is fixedly connected to the outer surfaces of both sides of the second connecting rod near one end, a fourth connecting rod is rotatably connected between the outsides of the two third fixed shafts, one end of the third connecting rod is rotatably connected to two fourth fixed shafts, a fifth connecting rod is fixedly connected between the two fourth fixed shafts, the outer surfaces of both sides of the fifth connecting rod are fixedly connected to the fifth fixed shaft, and one end of the second connecting rod is rotatably connected to the outsides of the two fifth fixed shafts.

[0008] Preferably, one end of the fifth connecting rod is rotatably connected to two sixth fixed shafts, a sixth connecting rod is fixedly connected between the two sixth fixed shafts, a damping shaft is rotatably connected between one end of the sixth connecting rod and one end of the fourth connecting rod, and the other end of the sixth connecting rod is fixedly connected to an anti-slip foot pad.

[0009] Preferably, the first reinforcement frame is fixedly connected to the bottom of the fixing block, and the second reinforcement frame is fixedly connected to the top of the connecting block.

[0010] Preferably, the third connecting rod is fixedly connected to a first fixed wheel in the middle of both sides, the second connecting rod is fixedly connected to a second fixed wheel on both sides near the third fixed axis, and a first elastic band is movably sleeved between the outer surface of the first fixed wheel and the outer surface of the second fixed wheel.

[0011] Preferably, the fifth connecting rod is fixedly connected to the middle of both sides with a third fixed wheel, the fourth connecting rod is fixedly connected to the middle of both sides with a fourth fixed wheel, and a second elastic band is movably sleeved between the outer surface of the third fixed wheel and the outer surface of the fourth fixed wheel.

[0012] Preferably, a mounting plate is fixedly connected to the top of the fixing block, and the mounting plate is used to install the landing gear on the bottom of the drone. A controller and a monitoring module are arranged at the bottom of the mounting plate, and the controller is electrically connected to the electric telescopic rod.

[0013] Preferably, the outsides of the four damping shafts are fixedly connected with sliding assemblies, and the sliding assemblies include fixed rods, the tops of the fixed rods are fixedly installed on the outsides of both sides of the damping shafts, the bottoms of the fixed rods are fixedly connected with planar thrust bearings, and the planar thrust bearings are used to adjust the sliding direction, the bottoms of the planar thrust bearings are fixedly connected with hydraulic sleeves, the internal seals of the hydraulic sleeves are injected with hydraulic oil, the inner wall of the hydraulic sleeves is slidably connected with a hydraulic rod, the bottom end of the hydraulic rod is fixedly connected with a fixed sleeve, the outer surface of the hydraulic sleeve is rotatably connected to a first connecting frame via a connecting shaft, the outer surface of the fixed sleeve is rotatably connected to a second connecting frame via a connecting shaft, and one end of the first connecting frame and one end of the second connecting frame are rotatably connected via a connecting shaft.

[0014] Preferably, the outer surface of the other side of the fixing sleeve is fixedly connected to a tripod, an axle is provided at the bottom end of the tripod, a roller is provided at the outer middle of the axle, the roller is used for the sliding of the UAV during landing, the outer surface of the axle is fixedly connected to a fixing plate, the outer surface of the fixing plate is fixedly connected to a brake clamp, a first brake pad is fixedly connected to the inner wall of one side of the brake clamp, an electric push rod is provided on the inner wall of the other side of the brake clamp, one end of the electric push rod is fixedly connected to a second brake pad, the second brake pad is movably embedded in the inside of the brake clamp, and the electric push rod is signal-connected to the controller.

[0015] Preferably, it also includes: a multifunctional UAV landing gear system, which includes: an air pressure altitude measurement unit, a laser altitude measurement unit, an attitude measurement unit, a core control unit, an actuator control unit and a drive module, the air pressure altitude measurement unit, the laser altitude measurement unit, the attitude measurement unit and the core control unit are electrically connected, the core control unit and the actuator control unit are electrically connected, and the actuator control unit and the drive module are wirelessly connected.

[0016] Preferably, the barometric altitude measurement unit, the laser altitude measurement unit and the attitude measurement unit all receive monitoring data through the core control unit, and the actuator control unit is used to judge the data received by the core control unit, and the driving module is used to control the deployment of the landing gear when the actuator control unit receives a UAV landing signal.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When in use, the electric telescopic rod is started by control to extend it, so that the distance between the first reinforcement frame and the second reinforcement frame becomes farther. After the distance becomes farther, the angle between the first connecting rod and the second connecting rod will increase. At this time, one end of the second connecting rod drives the fifth connecting rod to be lifted upward, and the third connecting rod is parallel to the second connecting rod. As the first connecting rod rotates, the third connecting rod will also drive the fifth connecting rod to rotate. The fourth connecting rod is parallel to the fifth connecting rod, so that the rotation angle of the sixth connecting rod is the same as the rotation angle of the second connecting rod. The first connecting rod, the third connecting rod, the fifth connecting rod, the fourth connecting rod and the sixth connecting rod are all folded close to the electric telescopic rod, and finally one-key folding is completed, which is convenient for storage and can reduce obstruction when the drone passes through a small space. The anti-slip foot pad is in direct contact with the ground when the entire support assembly is fully unfolded, which can assist the drone to improve stability when it descends and lands.

[0019] 2. When in use, the two ends of the first elastic band are elastically sleeved on the outside of the first fixed wheel and the second fixed wheel. When the position distance between the first fixed wheel and the second fixed wheel changes, the first elastic band will pull the two. Similarly, the two ends of the second elastic band are elastically sleeved on the outside of the third fixed wheel and the fourth fixed wheel. When the position distance between the third fixed wheel and the fourth fixed wheel changes, the second elastic band will pull the two, so that the connection between the multiple connecting rods has a certain elasticity.

[0020] 3. When in use, the roller contacts the ground, which enables the drone installed on the landing gear to glide and decelerate on the ground, thereby reducing the friction between the landing gear and the ground when the drone lands, and protecting the landing gear. The hydraulic sleeve presses toward the hydraulic rod, and the first connecting frame and the second connecting frame are tough, which can strengthen the connection between the hydraulic sleeve and the hydraulic rod to avoid breakage between the hydraulic sleeve and the hydraulic rod. The roller can be supported by the wheel axle and roll with the roller. The electric push rod here is connected to the external control system via Bluetooth. When an emergency occurs, the external control system controls the start of the electric push rod, so that the electric push rod pushes the second brake pad connected to it forward, and the first brake pad and the second brake pad will clamp the edge of the wheel axle, which can effectively prevent the drone from gliding too long.

[0021] 4. When in use, when the UAV is falling, the altitude of the UAV is determined by the air pressure altitude measurement unit and the laser altitude measurement unit, thereby judging the descent state of the UAV. At the same time, the attitude measurement unit can judge the inclination angle of the UAV when it descends. The core control unit can receive the data transmitted by the air pressure altitude measurement unit, the laser altitude measurement unit and the attitude measurement unit, and process and analyze the data. The actuator control unit controls the operation of the drive module according to the received data to complete the deployment of the landing gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front perspective view of a multifunctional UAV landing gear of the present invention;

[0023] Figure 2 This is a bottom-up stereoscopic diagram of a multifunctional UAV landing gear of the present invention;

[0024] Figure 3 This is a front perspective view of a fixed block portion of a multifunctional UAV landing gear of the present invention;

[0025] Figure 4 This is a front perspective view of a support component portion of a multifunctional UAV landing gear of the present invention;

[0026] Figure 5 This is a perspective view of the partial structure of the supporting assembly of a multifunctional UAV landing gear of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 This is a perspective view of the structure of the first elastic band of a multifunctional UAV landing gear of the present invention;

[0029] Figure 8 This is a bottom-up stereoscopic view of a sliding assembly portion of a multifunctional UAV landing gear of the present invention;

[0030] Fig. 9 This is a three-dimensional diagram of a fixing sleeve portion of a multifunctional UAV landing gear of the present invention;

[0031] Fig.10 This is a three-dimensional diagram of the brake clamp portion of a multifunctional UAV landing gear of the present invention;

[0032] Fig.11 This is a partially cutaway stereoscopic view of a brake clamp of a multifunctional UAV landing gear of the present invention;

[0033] Fig.12 This is a system diagram of a multifunctional UAV landing gear of the present invention.

[0034] In the figure:

[0035] 1. Support assembly; 101. First reinforcement frame; 102. First connecting rod; 103. Second reinforcement frame; 104. Second connecting rod; 105. First fixed shaft; 106. Second elastic band; 107. Third connecting rod; 108. Fourth fixed wheel; 109. Fifth connecting rod; 110. Third fixed wheel; 111. Second fixed wheel; 112. Anti-skid pad; 113. Sixth connecting rod; 114. Fifth fixed shaft; 115. First fixed wheel; 116. Fourth connecting rod; 117. First elastic band; 118. Third fixed shaft; 119. Second fixed shaft; 120. Sixth fixed shaft; 121. Fourth fixed shaft; 122. Damping shaft; 2. Sliding assembly; 20 1. Fixed rod; 202. Planar thrust bearing; 203. Hydraulic sleeve; 204. First connecting frame; 205. Second connecting frame; 206. Hydraulic rod; 207. Fixed sleeve; 208. Tripod; 209. Roller; 210. Wheel axle; 211. Brake clamp; 212. First brake pad; 213. Second brake pad; 214. Fixed plate; 215. Electric push rod; 3. Electric telescopic rod; 4. Connecting block; 5. Mounting plate; 6. Fixed block; 7. Controller; 8. Monitoring module; 9. Barometric altitude measuring unit; 10. Laser altitude measuring unit; 11. Attitude measuring unit; 12. Core control unit; 13. Actuator control unit; 14. Drive module. DETAILED DESCRIPTION

[0036] 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 implementation regulations described 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.

[0037] Example 1: Reference Figure 1 - Fig.11As shown, the present invention provides a technical solution: a multifunctional UAV landing gear, including an electric telescopic rod 3, and the electric telescopic rod 3 is used to drive to achieve one-key folding, the top of the electric telescopic rod 3 is fixedly connected with a fixing block 6, the bottom of the electric telescopic rod 3 is fixedly connected with a connecting block 4, a support assembly 1 is fixedly connected between the bottom of the fixing block 6 and the top of the connecting block 4, and the support assembly 1 is provided with four, and the support assembly 1 includes a first reinforcement frame 101 and a second reinforcement frame 103, a first connecting rod 102 is rotatably connected between the inner walls of the first reinforcement frame 101, a second connecting rod 104 is rotatably connected between the inner walls of the second reinforcement frame 103, and both sides of the first connecting rod 102 are fixedly connected to the first fixed shaft 1 05, a third connecting rod 107 is rotatably connected between the outsides of the two first fixed shafts 105, second fixed shafts 119 are fixedly connected to the outer surfaces of both sides of the second connecting rod 104, one end of the first connecting rod 102 is rotatably connected to the outside of the corresponding second fixed shaft 119, third fixed shafts 118 are fixedly connected to the outer surfaces of both sides of the second connecting rod 104 near one end, a fourth connecting rod 116 is rotatably connected between the outsides of the two third fixed shafts 118, one end of the third connecting rod 107 is rotatably connected to two fourth fixed shafts 121, a fifth connecting rod 109 is fixedly connected between the two fourth fixed shafts 121, and the outer surfaces of both sides of the fifth connecting rod 109 are fixedly connected to the fifth fixed shaft 114, One end of the second connecting rod 104 is rotatably connected to the outside of the two fifth fixed shafts 114, one end of the fifth connecting rod 109 is rotatably connected to the two sixth fixed shafts 120, a sixth connecting rod 113 is fixedly connected between the two sixth fixed shafts 120, a damping shaft 122 is rotatably connected between one end of the sixth connecting rod 113 and one end of the fourth connecting rod 116, the other end of the sixth connecting rod 113 is fixedly connected to the anti-slip foot pad 112, the first reinforcement frame 101 is fixedly connected to the bottom of the fixed block 6, the second reinforcement frame 103 is fixedly connected to the top of the connecting block 4, the first fixed wheels 115 are fixedly connected at the middle of both sides of the third connecting rod 107, and both sides of the second connecting rod 104 are close to the third fixed shaft 1 18 are fixedly connected with a second fixed wheel 111, a first elastic belt 117 is movably provided between the outer surface of the first fixed wheel 115 and the outer surface of the second fixed wheel 111, the middle of both sides of the fifth connecting rod 109 are fixedly connected with a third fixed wheel 110, the middle of both sides of the fourth connecting rod 116 are fixedly connected with a fourth fixed wheel 108, a second elastic belt 106 is movably provided between the outer surface of the third fixed wheel 110 and the outer surface of the fourth fixed wheel 108, the top of the fixed block 6 is fixedly connected with a mounting plate 5, and the mounting plate 5 is used to install the landing gear at the bottom of the drone, and a controller 7 and a monitoring module 8 are arranged at the bottom of the mounting plate 5, and the controller 7 is electrically connected to the electric telescopic rod 3.

[0038] In this embodiment, when in use, the controller 7 can control the extension and retraction of the electric telescopic rod 3. When the landing gear is working, the electric telescopic rod 3 is in a fully retracted state. When the landing gear is folded, the electric telescopic rod 3 is controlled to be started to extend, so that the distance between the first reinforcement frame 101 and the second reinforcement frame 103 becomes farther. After the distance becomes farther, the angle between the first connecting rod 102 and the second connecting rod 104 increases. At this time, one end of the second connecting rod 104 drives the fifth connecting rod 109 to be lifted upward, and at the same time, the third connecting rod 107 is in a parallel state with the second connecting rod 104. The third connecting rod 107 rotates with the first connecting rod 102. The fifth link 109 will also be driven to rotate. When the fourth link 116 is parallel to the fifth link 109, the fourth link 116, the sixth link 113, the fifth link 109 and the second link 104 form a parallelogram structure, so that the rotation angle of the sixth link 113 is the same as the rotation angle of the second link 104. When the second link 104 is close to the electric telescopic rod 3, the first link 102, the third link 107, the fifth link 109, the fourth link 116 and the sixth link 113 will all be folded close to the electric telescopic rod 3, and finally one-key folding is completed, which is convenient for storage and can be used in the drone. The anti-skid foot pad 112 is in direct contact with the ground when the entire support assembly 1 is fully unfolded, which can assist the drone in improving stability when it descends and lands. The first fixed axis 105, the second fixed axis 119, the third fixed axis 118, the fourth fixed axis 121, the fifth fixed axis 114 and the sixth fixed axis 120 all have a damping effect, which can prevent the first connecting rod 102, the second connecting rod 104, the third connecting rod 107, the fourth connecting rod 116, the fifth connecting rod 109 and the sixth connecting rod 113 from rotating too flexibly and out of control. At the same time, the first elastic band 117 The two ends are elastically sleeved on the outside of the first fixed wheel 115 and the second fixed wheel 111. When the position distance between the first fixed wheel 115 and the second fixed wheel 111 changes, the first elastic belt 117 will pull the two. Similarly, the two ends of the second elastic belt 106 are elastically sleeved on the outside of the third fixed wheel 110 and the fourth fixed wheel 108. When the position distance between the third fixed wheel 110 and the fourth fixed wheel 108 changes, the second elastic belt 106 will pull the two. This can make the connection between the multiple connecting rods have a certain degree of elasticity, and the monitoring module 8 can monitor and determine the deployment time of the landing gear.

[0039] Embodiment 2: Figure 1 - Fig.11As shown, the top of the fixed block 6 is fixedly connected with a mounting plate 5, and the mounting plate 5 is used to install the landing gear at the bottom of the drone, a controller 7 is arranged at the bottom of the mounting plate 5, and the controller 7 is electrically connected to the electric telescopic rod 3, and the outsides of the four damping shafts 122 are fixedly connected with sliding components 2, and the sliding components 2 include a fixed rod 201, the top of the fixed rod 201 is fixedly installed on the outside of both sides of the damping shaft 122, the bottom of the fixed rod 201 is fixedly connected with a plane thrust bearing 202, and the plane thrust bearing 202 is used to adjust the sliding direction, the bottom of the plane thrust bearing 202 is fixedly connected with a hydraulic sleeve 203, the internal seal of the hydraulic sleeve 203 is injected with hydraulic oil, the inner wall of the hydraulic sleeve 203 is slidably connected with a hydraulic rod 206, the bottom end of the hydraulic rod 206 is fixedly connected with a fixed sleeve 207, and the outer surface of the hydraulic sleeve 203 is rotatably connected to the first connecting frame 204 through a connecting shaft, The outer surface of the sleeve 207 is rotatably connected to the second connecting frame 205 through a connecting shaft, one end of the first connecting frame 204 and one end of the second connecting frame 205 are rotatably connected through a connecting shaft, the outer surface of the other side of the fixed sleeve 207 is fixedly connected to a tripod 208, a wheel axle 210 is arranged at the bottom end of the tripod 208, a roller 209 is arranged at the outer middle of the wheel axle 210, and the roller 209 is used for the sliding of the UAV during landing, the outer surface of the wheel axle 210 is fixedly connected to a fixing plate 214, the outer surface of the fixing plate 214 is fixedly connected to a brake clamp 211, the inner wall of one side of the brake clamp 211 is fixedly connected to a first brake pad 212, the inner wall of the other side of the brake clamp 211 is arranged to an electric push rod 215, one end of the electric push rod 215 is fixedly connected to a second brake pad 213, the second brake pad 213 is movably embedded in the brake clamp 211, and the electric push rod 215 is connected to the controller 7 by signal.

[0040] In this embodiment, when the controller 7 controls the electric telescopic rod 3 to extend and retract, when the electric telescopic rod 3 is in an incompletely extended state, the sliding assembly 2 will descend along with the decline in the position of the damping shaft 122, and the electric telescopic rod 3 will stop when the roller 209 touches the ground. At this time, the drone installed on the landing gear can glide and decelerate on the ground, thereby reducing the friction between the landing gear and the ground when the drone lands, which has a protective effect on the landing gear. The downward pressure of the drone will press the hydraulic sleeve 203 toward the hydraulic rod 206. The interior of the hydraulic sleeve 203 is filled with hydraulic oil, so it has a good buffering effect, which can improve the landing stability. The first connecting frame 204 and the second connecting frame 205 are tough and can strengthen the connection between the hydraulic sleeve 203 and the hydraulic rod 206 to avoid breakage between the hydraulic sleeve 203 and the hydraulic rod 206. The roller 209 can be supported by the wheel axle 210 and roll with the roller 209. The electric push rod 215 here is connected to the external control system via Bluetooth. When an emergency occurs, the external control system controls the start of the electric push rod 215, so that the electric push rod 215 pushes the second brake pad 213 connected thereto forward. The first brake pad 212 and the second brake pad 213 will clamp the edge of the wheel axle 210, which can effectively prevent the drone from gliding too long.

[0041] Embodiment three: Fig.12 As shown, it also includes: a multifunctional UAV landing gear system, which includes: an air pressure altitude measurement unit 9, a laser altitude measurement unit 10, an attitude measurement unit 11, a core control unit 12, an actuator control unit 13 and a drive module 14, the air pressure altitude measurement unit 9, the laser altitude measurement unit 10, the attitude measurement unit 11 and the core control unit 12 are all electrically connected, the core control unit 12 and the actuator control unit 13 are electrically connected, the actuator control unit 13 and the drive module 14 are wirelessly connected, the air pressure altitude measurement unit 9, the laser altitude measurement unit 10 and the attitude measurement unit 11 all receive monitoring data through the core control unit 12, and the actuator control unit 13 is used to judge the data received by the core control unit 12, and the drive module 14 is used to control the deployment of the landing gear when the actuator control unit 13 receives the UAV landing signal.

[0042] In this embodiment, when the drone is falling, the altitude of the drone is determined by the air pressure altitude measurement unit 9. Since the atmospheric pressure increases with the decrease of altitude, the atmospheric pressure increases by about 1 hPa for every 8.4 meters of altitude decrease under standard atmospheric pressure. Therefore, it is possible to determine whether the drone is descending based on the change in atmospheric pressure. At the same time, the laser altitude measurement unit 10 determines the altitude by emitting a laser beam and measuring the time of reflected light. When the laser beam reflection time is shortened, it means that the drone is descending. The data of the air pressure altitude measurement unit 9 and the laser altitude measurement unit 10 are combined to determine the descent state of the drone. At the same time, the attitude measurement unit 11 can measure the acceleration of the drone in each axis. The core control unit 12 can receive the data of the air pressure altitude measurement unit 9 and the laser altitude measurement unit 10. The data transmitted by the laser height measurement unit 10 and the attitude measurement unit 11 are processed and analyzed. The descent speed is determined according to the data change rate of the barometric height measurement unit 9 and the laser height measurement unit 10, and the tilt angle of the UAV during descent is determined according to the data of the attitude measurement unit 11. When the UAV is in a vertical state during descent, it indicates that the UAV is vertically landing. At this time, the actuator control unit 13 controls the driving module 14 to control the landing gear. When the laser height measurement unit 10 detects that the distance between it and the landing plane reaches the set threshold, the landing gear is deployed to complete the landing. However, during the descent process, when the data output by the attitude measurement unit 11 shows that the tilt angle exceeds the normal threshold, the actuator control unit 13 will not control the start of the driving module 14 even if the height reaches the set threshold.

[0043] The method of using the device and the working principle are as follows: when in use, the controller 7 can control the extension and retraction of the electric telescopic rod 3. When the landing gear is working, the electric telescopic rod 3 is in a fully retracted state. When the landing gear is folded, the electric telescopic rod 3 is controlled to be started to extend, so that the distance between the first reinforcement frame 101 and the second reinforcement frame 103 becomes farther. After the distance becomes farther, the angle between the first connecting rod 102 and the second connecting rod 104 increases. At this time, one end of the second connecting rod 104 drives the fifth connecting rod 109 to be lifted upward, and at the same time, the third connecting rod 107 is in a parallel state with the second connecting rod 104. The third connecting rod 107 will also drive the fifth connecting rod 109 to rotate as the first connecting rod 102 rotates, and the fourth connecting rod 116 is in a parallel state with the fifth connecting rod 109. When the electric telescopic rod 3 is close to the second connecting rod 104, the first connecting rod 102, the third connecting rod 107, the fifth connecting rod 109, the fourth connecting rod 116 and the sixth connecting rod 113 are folded close to the electric telescopic rod 3, and finally the one-key folding is completed, which is convenient for storage and can reduce obstruction when the drone passes through a small space. The anti-slip foot pad 112 is in direct contact with the ground when the entire support assembly 1 is fully unfolded. The first fixed axis 105, the second fixed axis 119, the third fixed axis 118, the fourth fixed axis 119 are in direct contact with the ground. 21. The fifth fixed shaft 114 and the sixth fixed shaft 120 both have a damping effect, which can prevent the first connecting rod 102, the second connecting rod 104, the third connecting rod 107, the fourth connecting rod 116, the fifth connecting rod 109, and the sixth connecting rod 113 from rotating too flexibly and out of control. At the same time, both ends of the first elastic belt 117 are elastically sleeved outside the first fixed wheel 115 and the second fixed wheel 111. When the position distance between the first fixed wheel 115 and the second fixed wheel 111 changes, the first elastic belt 117 will pull the two. Similarly, both ends of the second elastic belt 106 are elastically sleeved outside the third fixed wheel 110 and the fourth fixed wheel 108. When the position distance between the third fixed wheel 110 and the fourth fixed wheel 108 changes, the first elastic belt 117 will pull the two. When the electric telescopic rod 3 is extended and retracted by the controller 7, the sliding assembly 2 will fall along with the decline of the damping shaft 122, and the electric telescopic rod 3 will stop when the roller 209 touches the ground. Then, the UAV installed on the landing gear can glide and decelerate on the ground. The downward pressure of the UAV will press the hydraulic sleeve 203 toward the hydraulic rod 206. The interior of the hydraulic sleeve 203 is filled with hydraulic oil, so it has a good buffering effect and can improve the landing stability. The first connecting frame 204 and the second connecting frame 205 have toughness.The connection between the hydraulic sleeve 203 and the hydraulic rod 206 can be strengthened to avoid the hydraulic sleeve 203 and the hydraulic rod 206 from breaking. The roller 209 can be supported by the wheel axle 210 and rolled with the roller 209. The electric push rod 215 here is connected to the external control system through Bluetooth. When an emergency occurs, the external control system controls the start of the electric push rod 215, so that the electric push rod 215 pushes the second brake pad 213 connected thereto forward. The first brake pad 212 and the second brake pad 213 clamp the edge of the wheel axle 210. When the drone is falling, the altitude of the drone is determined by the air pressure altitude measurement unit 9. Since the atmospheric pressure increases with the decrease in altitude, the air pressure increases by about 1 hPa for every decrease of about 8.4 meters in altitude under standard atmospheric pressure. Therefore, it is possible to judge whether the drone is descending based on the change in atmospheric pressure. At the same time, the laser altitude measurement unit 10 judges the altitude by emitting a laser beam and measuring the time of reflected light. When the laser beam reflection time is shortened, it means that the drone is descending. The air pressure altitude measurement unit 9 and The data from the laser height measurement unit 10 can be combined to determine the descent state of the drone. At the same time, the attitude measurement unit 11 can measure the acceleration of the drone in each axis. The core control unit 12 can receive the data transmitted by the air pressure height measurement unit 9, the laser height measurement unit 10 and the attitude measurement unit 11 and process and analyze the data. It determines the descent speed according to the data change rate of the air pressure height measurement unit 9 and the laser height measurement unit 10, and determines the tilt angle of the drone when it is descending according to the data of the attitude measurement unit 11. When it is in a vertical state when descending, it means that the drone is landing vertically. At this time, the actuator control unit 13 controls the drive module 14 to control the landing gear. When the laser height measurement unit 10 detects that the distance between it and the landing plane reaches the set threshold, the landing gear is deployed to complete the landing. However, during the descent process, when the data output by the attitude measurement unit 11 shows that the tilt angle exceeds the normal threshold, the actuator control unit 13 will not control the start of the drive module 14 even if the height reaches the set threshold.

[0044] The wiring diagram of the electric push rod 215, the electric telescopic rod 3, the controller 7 and the monitoring module 8 in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use. Therefore, the control method and wiring arrangement of the electric push rod 215, the electric telescopic rod 3, the controller 7 and the monitoring module 8 are no longer explained in detail.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional UAV landing gear, comprising an electric telescopic rod (3), wherein the electric telescopic rod (3) is used for driving to realize one-key folding, wherein the top end of the electric telescopic rod (3) is fixedly connected to a fixing block (6), the bottom end of the electric telescopic rod (3) is fixedly connected to a connecting block (4), a supporting assembly (1) is fixedly connected between the bottom of the fixing block (6) and the top of the connecting block (4), and four supporting assemblies (1) are provided, characterized in that: The support assembly (1) comprises a first reinforcement frame (101) and a second reinforcement frame (103), wherein a first connecting rod (102) is rotatably connected between the inner walls of the first reinforcement frame (101), and a second connecting rod (104) is rotatably connected between the inner walls of the second reinforcement frame (103), both sides of the first connecting rod (102) are fixedly connected to a first fixed shaft (105), a third connecting rod (107) is rotatably connected between the outsides of the two first fixed shafts (105), and both sides of the outer surfaces of the second connecting rod (104) are fixedly connected to a second fixed shaft (119), and one end of the first connecting rod (102) is rotatably connected to the corresponding first fixed shaft (119). Outside the two fixed shafts (119), the outer surfaces of both sides of the second connecting rod (104) are fixedly connected to the third fixed shaft (118) near one end, and the fourth connecting rod (116) is rotatably connected between the outsides of the two third fixed shafts (118). One end of the third connecting rod (107) is rotatably connected to two fourth fixed shafts (121), and a fifth connecting rod (109) is fixedly connected between the two fourth fixed shafts (121). The outer surfaces of both sides of the fifth connecting rod (109) are fixedly connected to the fifth fixed shaft (114), and one end of the second connecting rod (104) is rotatably connected to the outsides of the two fifth fixed shafts (114).

2. The multifunctional UAV landing gear according to claim 1, characterized in that: One end of the fifth connecting rod (109) is rotatably connected to two sixth fixed shafts (120), a sixth connecting rod (113) is fixedly connected between the two sixth fixed shafts (120), a damping rotating shaft (122) is rotatably connected between one end of the sixth connecting rod (113) and one end of the fourth connecting rod (116), and the other end of the sixth connecting rod (113) is fixedly connected to an anti-slip foot pad (112).

3. The multifunctional UAV landing gear according to claim 2, characterized in that: The first reinforcing frame (101) is fixedly connected to the bottom of the fixing block (6), and the second reinforcing frame (103) is fixedly connected to the top of the connecting block (4).

4. The multifunctional UAV landing gear according to claim 3, characterized in that: The third connecting rod (107) is fixedly connected to a first fixed wheel (115) at the middle of both sides, and the second connecting rod (104) is fixedly connected to a second fixed wheel (111) at both sides close to the third fixed shaft (118), and a first elastic band (117) is movably sleeved between the outer surface of the first fixed wheel (115) and the outer surface of the second fixed wheel (111).

5. The multifunctional UAV landing gear according to claim 4, characterized in that: The middle of both sides of the fifth connecting rod (109) are fixedly connected to third fixed wheels (110), the middle of both sides of the fourth connecting rod (116) are fixedly connected to fourth fixed wheels (108), and a second elastic band (106) is movably sleeved between the outer surfaces of the third fixed wheels (110) and the fourth fixed wheels (108).

6. The multifunctional UAV landing gear according to claim 5, characterized in that: The top of the fixing block (6) is fixedly connected to a mounting plate (5), and the mounting plate (5) is used to mount the landing gear on the bottom of the drone. A controller (7) and a monitoring module (8) are arranged at the bottom of the mounting plate (5), and the controller (7) is electrically connected to the electric telescopic rod (3).

7. The multifunctional UAV landing gear according to claim 6, characterized in that: The outsides of the four damping shafts (122) are all fixedly connected to a sliding assembly (2), and the sliding assembly (2) comprises a fixing rod (201), the top of the fixing rod (201) is fixedly installed on the outsides of both sides of the damping shaft (122), the bottom of the fixing rod (201) is fixedly connected to a plane thrust bearing (202), and the plane thrust bearing (202) is used to adjust the sliding direction, and the bottom of the plane thrust bearing (202) is fixedly connected to a hydraulic sleeve (203), and the hydraulic sleeve (203) Hydraulic oil is injected into the internal seal, the inner wall of the hydraulic sleeve (203) is slidably connected to a hydraulic rod (206), the bottom end of the hydraulic rod (206) is fixedly connected to a fixed sleeve (207), the outer surface of the hydraulic sleeve (203) is rotatably connected to a first connecting frame (204) via a connecting shaft, the outer surface of the fixed sleeve (207) is rotatably connected to a second connecting frame (205) via a connecting shaft, and one end of the first connecting frame (204) and one end of the second connecting frame (205) are rotatably connected via a connecting shaft.

8. The multifunctional UAV landing gear according to claim 7, characterized in that: The other side outer surface of the fixing sleeve (207) is fixedly connected with a tripod (208), the bottom end of the tripod (208) is provided with a wheel axle (210), the middle part of the outside of the wheel axle (210) is provided with a roller (209), and the roller (209) is used for the sliding of the UAV when landing; the outer surface of the wheel axle (210) is fixedly connected with a fixing plate (214), the outer surface of the fixing plate (214) is fixedly connected with a brake clamp (211), the inner wall of one side of the brake clamp (211) is fixedly connected with a first brake pad (212), the inner wall of the other side of the brake clamp (211) is provided with an electric push rod (215), one end of the electric push rod (215) is fixedly connected with a second brake pad (213), the second brake pad (213) is movably embedded in the inside of the brake clamp (211), and the electric push rod (215) is signal-connected with the controller (7).

9. The multifunctional UAV landing gear according to claim 8, characterized in that: Also includes: A multifunctional unmanned aerial vehicle landing gear system comprises: an air pressure altitude measurement unit (9), a laser altitude measurement unit (10), an attitude measurement unit (11), a core control unit (12), an actuator control unit (13) and a drive module (14); The air pressure altitude measurement unit (9), the laser altitude measurement unit (10), the posture measurement unit (11) and the core control unit (12) are all electrically connected, the core control unit (12) and the actuator control unit (13) are electrically connected, and the actuator control unit (13) and the drive module (14) are wirelessly connected.

10. The multifunctional UAV landing gear according to claim 9, characterized in that: The air pressure altitude measurement unit (9), the laser altitude measurement unit (10) and the attitude measurement unit (11) all receive monitoring data through a core control unit (12), and the actuator control unit (13) is used to judge the data received by the core control unit (12), and the driving module (14) is used to control the deployment of the landing gear when the actuator control unit (13) receives a landing signal of the unmanned aerial vehicle.

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