A fixed landing platform for unmanned aerial vehicles

Abstract

The present invention relates to the field of unmanned aerial vehicles, and in particular to a landing and fixing platform for unmanned aerial vehicles. The present invention provides a landing and fixing platform for unmanned aerial vehicles, which can fix the wings and blades of the unmanned aerial vehicle more stably, and can effectively protect the wings and blades of the unmanned aerial vehicle. A landing and fixing platform for unmanned aerial vehicles includes a main frame, a sliding cover, a stepper motor, etc.; the left and right sides of the main frame are slidably connected with sliding covers, and the inner upper surface of the main frame is provided with two stepper motors. When the unmanned aerial vehicle lands on the apron, the two stepper motors will drive the apron to move downward, and at the same time, the movement of the sliding positioning rod and the sliding fixing rod will contact the tripod of the unmanned aerial vehicle, and push the unmanned aerial vehicle to move to the center position of the apron, limit the unmanned aerial vehicle at the center position of the apron, and then locate and fix the position of the apron, so as to charge the unmanned aerial vehicle.

Description

Technical Field

[0001] The present invention relates to the field of unmanned aerial vehicles, and in particular to a fixed landing platform for unmanned aerial vehicles. Background Art

[0002] Unmanned aerial vehicles, also known as drones, 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 on-board computers. With the development of industry, the production of drones has become more automated, greatly improving work efficiency while also saving manpower.

[0003] Power inspection is one of the many applications of drones. After the power inspection, the drone needs to land on a fixed platform for charging. In the prior art, after the drone lands on the fixed platform, the fixed platform will position the drone so that the drone is aligned with the charging device at the center of the fixed platform, and then charge the drone. However, the existing fixed platform does not stably fix the drone, nor does it effectively protect the wings and blades of the drone. If the fixed platform is bumped, it will cause the drone to shake, and it will also cause the drone to shake when the fixed platform is moved. The shaking of the drone may cause the wings and blades to collide and cause damage to the drone, increasing maintenance costs. Summary of the invention

[0004] In order to overcome the existing defects, the present invention provides a UAV landing and fixing platform, which can more stably fix the wings and blades of the UAV and effectively protect the wings and blades of the UAV.

[0005] The technical solution is as follows: A fixed landing platform for an unmanned aerial vehicle, comprising a main frame, a sliding cover, a stepper motor, a screw rod, a helipad, a mounting plate and a fixing mechanism, wherein sliding covers are slidably connected to the left and right sides of the main frame, and the two sliding covers are symmetrically arranged, and two stepper motors are fixedly connected to the inner upper surface of the main frame, and the two stepper motors are staggered. Screw rods are fixedly connected to the output shafts of the two stepper motors, and the two screw rods are rotatably connected to the main frame. A helipad is threadedly connected between the two screw rods, and the helipad is slidably connected to the inner side of the main frame. The mounting plate is fixedly connected to the bottom of the helipad, and a unmanned aerial vehicle is placed on the top of the helipad. The unmanned aerial vehicle is provided with two tripods and four fixed wings, and the four fixed wings are respectively provided with blades, and the fixing mechanism is arranged on the helipad.

[0006] Optionally, four guide grooves are provided on the main frame.

[0007] Optionally, the fixing mechanism includes a sliding positioning rod, a sliding fixing rod, a short hydraulic cylinder, a long hydraulic cylinder, a piston rod, a push plate and a hydraulic pipe. Two sliding positioning rods are slidably connected to the apron, and the two sliding positioning rods are symmetrically arranged. Two sliding fixing rods are slidably connected to the apron, and the two sliding fixing rods are symmetrically arranged. The two sliding fixing rods are both located below the two sliding positioning rods. Four short hydraulic cylinders are fixedly connected to the upper side surface of the mounting plate, and four long hydraulic cylinders are fixedly connected to the upper side surface of the mounting plate. Piston rods are slidably connected in the four long hydraulic cylinders, two of which are fixedly connected to one end of the two sliding positioning rods, respectively, and the other two piston rods are fixedly connected to one end of the sliding fixing rod, respectively. Push plates are slidably connected in the four short hydraulic cylinders, and the four push plates are slidably connected to the four guide grooves of the main frame, respectively, and a hydraulic pipe is connected between the short hydraulic cylinder and the long hydraulic cylinder.

[0008] Optionally, the two sliding positioning rods and the two sliding fixing rods form a "well" structure, and the UAV is located in the middle of the "well", and the tripod of the UAV is in contact with the sliding positioning rods and the sliding fixing rods respectively.

[0009] Optionally, a supporting mechanism is also included, which is arranged on the apron, and the supporting mechanism includes a fixing ring, a guide column, a support column, a clamping rod and a tension spring. Eight fixing rings are fixedly connected to the bottom of the apron, and two of the fixing rings form a group. Four guide columns are fixedly connected to the inner upper surface of the main frame, and the four guide columns are slidably connected to support columns. The four support columns are slidably connected to the apron, and the tops of the four support columns are respectively in contact with the four fixed wings of the drone. A clamping rod is slidably connected to each of the fixing rings, and two of the clamping rods form a group. Each of the clamping rods is in contact with the guide column, and a tension spring is connected between the fixing ring and the clamping rod.

[0010] Optionally, two clamping holes are provided on the upper portion of each of the support columns.

[0011] Optionally, it also includes a limiting mechanism, which is arranged on the main frame, and the limiting mechanism includes a square box, a guide frame, a connecting spring and an airbag. Four square boxes are fixedly connected to the inner upper surface of the main frame, and the four square boxes are slidably connected to the guide frames. Guide holes are provided in the four guide frames. The four fixed wings of the drone are respectively located in the four guide frames, and the four guide frames all pass through the apron. Connecting springs are respectively connected between the four guide frames and the apron. An airbag is fixedly connected to the top of each guide frame. The airbag is made of elastic material, and a vent is provided on each airbag, and the vent is connected to the guide hole of the guide frame. The four blades of the drone are in contact with the four airbags respectively.

[0012] Optionally, a protection rod is also included. Two protection rods are fixedly connected to the inner top of the two sliding covers. The two protection rods are in contact with the sliding positioning rod, and the tripod of the drone is located between the protection rod and the sliding positioning rod.

[0013] Optionally, it also includes a protective ring, and the inner top of the two sliding covers are fixedly connected to two protective rings, the two protective rings on the same sliding cover are symmetrically arranged, and the four protective rings are respectively located on the top of the four fixed wings of the drone.

[0014] The beneficial effects of the present invention are: 1. When the UAV lands on the apron, the two stepper motors will drive the apron to move downward, and the UAV will move downward under the action of gravity. When the apron moves downward, it will drive the two sliding positioning rods and the two sliding fixing rods to move downward together. The movement of the sliding positioning rods and the sliding fixing rods will contact the tripod of the UAV and push the UAV to move to the center position of the apron, limit the UAV to the center position of the apron, and then locate and fix the position of the apron to charge the UAV.

[0015] 2. The downward movement of the apron will drive the card rod to move downward, causing the support column to move downward. When the support column is blocked by the guide column, it will no longer move downward. At the same time, the downward movement of the drone will cause the four fixed wings to contact the tops of the four support columns respectively. The four support columns will support the fixed wings of the drone and maintain the balance of the drone, reducing the shaking of the drone after parking, and then assisting the drone to land and place more stably, so as to stably charge the drone and reduce the shaking of the drone when carrying the main frame.

[0016] 3. The downward movement of the apron will drive the guide frame to move downward. The downward movement of the guide frame will squeeze the gas in the square box into the airbag, causing the airbag to expand. The four airbags will expand and contact the blades of the drone respectively, and limit the blades of the drone. The friction between the airbags and the blades can reduce the self-rotation of the drone blades, so that the drone can fix the blades more stably when charging in the main frame, thereby protecting the drone blades and reducing the failure rate of the blades when transporting the drone. It has strong protection.

[0017] 4. When the drone is parked, the sliding positioning rod moves downward to contact the protection rod and lock the two tripods of the drone to further fix the drone. This can prevent the drone from shaking when the staff moves the main frame, allowing the drone to charge more stably; the protective ring will further protect the drone's blades to prevent them from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention in a closed state.

[0019] Figure 2 It is a schematic diagram of the first three-dimensional structure of the present invention in an unfolded state.

[0020] Figure 3 It is a schematic diagram of the second three-dimensional structure of the present invention in an unfolded state.

[0021] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention in a closed state.

[0022] Figure 5 It is a schematic diagram of the partially separated three-dimensional structure of the present invention.

[0023] Figure 6 It is a schematic diagram of a first partial three-dimensional structure of the fixing mechanism, the supporting mechanism and the limiting mechanism in the closed state of the present invention.

[0024] Figure 7 It is a schematic diagram of a second partial three-dimensional structure of the fixing mechanism, the supporting mechanism and the limiting mechanism in the closed state of the present invention.

[0025] Figure 8 It is a partial three-dimensional structural schematic diagram of the fixing mechanism and the supporting mechanism in the unfolded state of the present invention.

[0026] Fig. 9 It is a schematic diagram of a partial three-dimensional structure of the fixing mechanism in the unfolded state of the present invention.

[0027] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged three-dimensional structure of A in the middle.

[0028] Fig.11 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixing mechanism in the unfolded state of the present invention.

[0029] Fig.12 It is a schematic diagram of a first partial three-dimensional structure of the support mechanism and the limiting mechanism in the unfolded state of the present invention.

[0030] Fig.13 It is a schematic diagram of a second partial three-dimensional structure of the support mechanism and the limiting mechanism in the unfolded state of the present invention.

[0031] Fig.14 It is a schematic cross-sectional three-dimensional structural diagram of the support mechanism of the present invention in a closed state.

[0032] Fig.15 It is a schematic diagram of the cross-sectional three-dimensional structure of the closing state limiting mechanism of the present invention.

[0033] Fig.16 For the present invention Fig.15 Schematic diagram of the enlarged three-dimensional structure of B in the figure.

[0034] Markings in the accompanying drawings: 1_main frame, 2_sliding cover, 3_stepping motor, 4_screw rod, 5_helipad, 51_mounting plate, 6_UAV, 71_sliding positioning rod, 72_sliding fixing rod, 73_short hydraulic cylinder, 74_long hydraulic cylinder, 75_piston rod, 76_push plate, 77_hydraulic pipe, 81_fixing ring, 82_guide column, 83_support column, 84_clamp rod, 85_tension spring, 91_square box, 92_guide frame, 93_connecting spring, 94_airbag, 10_protection rod, 11_protection ring. DETAILED DESCRIPTION

[0035] 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.

[0036] Embodiment 1: A drone landing fixed platform, such as Figure 1-Figure 11 As shown, it includes a main frame 1, a sliding cover 2, a stepper motor 3, a screw rod 4, a helipad 5, a mounting plate 51 and a fixing mechanism. The sliding covers 2 are slidably connected to the left and right sides of the main frame 1, and the two sliding covers 2 are symmetrically arranged. The inner upper surface of the main frame 1 is connected to two stepper motors 3 by bolts, and the two stepper motors 3 are staggered. The output shafts of the two stepper motors 3 are fixedly connected with screw rods 4, and the two screw rods 4 are vertically arranged. The two screw rods 4 are rotatably connected to the main frame 1, and the helipad 5 is threadedly connected between the two screw rods 4. The helipad 5 is slidably connected to the inner side of the main frame 1, and the mounting plate 51 is bolted to the bottom of the helipad 5. A drone 6 is placed on the top of the helipad 5. The drone 6 is provided with two tripods and four fixed wings, and the four fixed wings are respectively provided with blades. The fixing mechanism is arranged on the helipad 5.

[0037] The main frame 1 is provided with four guide grooves.

[0038] The fixing mechanism includes a sliding positioning rod 71, a sliding fixing rod 72, a short hydraulic cylinder 73, a long hydraulic cylinder 74, a piston rod 75, a push plate 76 and a hydraulic pipe 77. Two sliding positioning rods 71 ​​are slidably connected to the apron 5, and the two sliding positioning rods 71 ​​are symmetrically arranged. Two sliding fixing rods 72 are slidably connected to the apron 5, and the two sliding fixing rods 72 are symmetrically arranged. Both of the two sliding fixing rods 72 are located below the two sliding positioning rods 71. Four short hydraulic cylinders 73 are connected to the upper side of the mounting plate 51 by bolts. Four long hydraulic cylinders 74 are connected to the upper side by bolts, and piston rods 75 are slidably connected in the four long hydraulic cylinders 74. The four piston rods 75 are all horizontally arranged, two of which are fixedly connected to one end of the two sliding positioning rods 71, and the other two piston rods 75 are fixedly connected to one end of the sliding fixing rod 72, respectively. Push plates 76 are slidably connected in the four short hydraulic cylinders 73, and the four push plates 76 are slidably connected to the four guide grooves of the main frame 1, respectively. A hydraulic pipe 77 is connected between the short hydraulic cylinder 73 and the long hydraulic cylinder 74.

[0039] The two sliding positioning rods 71 ​​and the two sliding fixing rods 72 form a "well" structure, and the UAV 6 is located in the middle of the "well", and the tripod of the UAV 6 is in contact with the sliding positioning rods 71 ​​and the sliding fixing rods 72 respectively.

[0040] At first, the hydraulic pipes 77 are filled with hydraulic oil, and the piston rod 75 and the side of the long hydraulic cylinder 74 connected to the hydraulic pipe 77 are also filled with hydraulic oil. In actual operation, the main frame 1 is provided with a charging device for the drone 6, and the drone 6 is located in the main frame 1. The staff first places the main frame 1 on the ground, and then pushes the two sliding covers 2 to move away from each other. The movement of the two sliding covers 2 will open the main frame 1, and then the staff starts the two stepper motors 3 at the same time. The rotation of the output shaft of the stepper motor 3 will drive the screw rod 4 to rotate, and the rotation of the two screw rods 4 will drive the apron 5 to move upward. The upward movement of the apron 5 will drive the drone 6, the mounting plate 51, the two sliding positioning rods 71 ​​and the two sliding fixing rods 72 to move upward together, and the upward movement of the mounting plate 51 will drive the short hydraulic cylinder 73 and the long hydraulic cylinder 74 to move upward together, and the upward movement of the short hydraulic cylinder 73 will drive the piston rod 75 and the hydraulic pipe 77 to move upward together, and the long hydraulic cylinder 74 will move upward. The movement will drive the push plate 76 to move upward. The four push plates 76 will move along the guide grooves of the main frame 1 while moving upward. The movement of the four push plates 76 along the guide grooves of the main frame 1 will pull the gas in the short hydraulic cylinder 73. Since the short hydraulic cylinder 73 is connected to the long hydraulic cylinder 74 through the hydraulic pipe 77, under the action of the pressure in the short hydraulic cylinder 73, the hydraulic oil between the piston rod 75 and the long hydraulic cylinder 74 will flow into the hydraulic pipe 77, and the hydraulic pipe 77 will flow into the short hydraulic cylinder 73. At the same time, under the action of the pressure in the long hydraulic cylinder 74, the piston rod 75 will move along the long hydraulic cylinder 74. The movement of the four piston rods 75 will push the two sliding positioning rods 71 ​​and the two sliding fixing rods 72 to move away from each other. The movement of the two sliding positioning rods 71 ​​and the two sliding fixing rods 72 will be out of contact with the UAV 6. When the apron 5 moves upward to the top of the screw rod 4, the two stepping motors 3 are turned off, and then the staff starts the UAV 6 to fly.When the UAV 6 finishes flying, the staff controls the UAV 6 to land on the apron 5, and then starts the two stepper motors 3. The reverse rotation of the output shaft of the stepper motor 3 will drive the screw rod 4 to rotate in the opposite direction, and the reverse rotation of the two screw rods 4 will drive the apron 5 to reset downward, and the UAV 6 will reset downward under the action of gravity. The downward reset of the apron 5 will drive the mounting plate 51, the two sliding positioning rods 71 ​​and the two sliding fixing rods 72 to reset downward together, and the downward reset of the mounting plate 51 will drive the short hydraulic cylinder 73 and the long hydraulic cylinder 74 to reset downward together, and the downward reset of the short hydraulic cylinder 73 will drive the piston rod 75 and the hydraulic pipe 77 to reset downward together, and the downward reset of the long hydraulic cylinder 74 will drive the push plate 76 to reset downward, and the four push plates 76 will reset along the guide groove of the main frame 1 while resetting downward, and the four push plates 76 will reset along the guide groove of the main frame 1 The hydraulic oil in the short hydraulic cylinder 73 will be squeezed and flow into the hydraulic pipe 77, and the hydraulic pipe 77 will flow between the piston rod 75 and the long hydraulic cylinder 74. The hydraulic oil in the long hydraulic cylinder 74 will push the piston rod 75 to reset. The reset of the four piston rods 75 will drive the two sliding positioning rods 71 ​​and the two sliding fixing rods 72 to move in a direction close to each other. The movement of the sliding positioning rods 71 ​​and the sliding fixing rods 72 will re-contact the tripod of the UAV 6 and push the UAV 6 to move to the center of the apron 5, limit the UAV 6 to the center of the apron 5, and then locate and fix the position of the apron 5. The charging equipment in the main frame 1 will automatically charge the UAV 6, and then the staff will push the two sliding covers 2 to reset in a direction close to each other, cover the main frame 1, and prevent the UAV 6 from being exposed to the sun and rain when charging. ;

[0041] Embodiment 2: Based on embodiment 1, Figure 2-Figure 14 As shown, it also includes a supporting mechanism, which is arranged on the apron 5. The supporting mechanism includes a fixing ring 81, a guide column 82, a support column 83, a clamping rod 84 and a tension spring 85. Eight fixing rings 81 are connected to the bottom of the apron 5 by bolts, and two of the fixing rings 81 form a group. Four guide columns 82 are connected to the inner upper surface of the main frame 1 by bolts. The four guide columns 82 are slidably connected to the support columns 83. The four support columns 83 are slidably connected to the apron 5. The tops of the four support columns 83 are respectively in contact with the four fixed wings of the drone 6. Each of the fixing rings 81 is slidably connected to the clamping rod 84, and two of the clamping rods 84 form a group. Each of the clamping rods 84 is in contact with the guide column 82. Each of the clamping rods 84 is provided with two inclined surfaces. A tension spring 85 is connected between the fixing ring 81 and the clamping rod 84 by a hook, and the tension spring 85 is sleeved on the clamping rod 84.

[0042] Two locking holes are formed on the upper portion of each of the support columns 83 .

[0043] At first, the fixed wing of the UAV 6 is placed on the top of the support column 83. Since the guide column 82 squeezes the clamping rod 84, the tension spring 85 is in a stretched state. When the apron 5 moves upward, it will drive the fixing ring 81 to move upward. When the UAV 6 moves upward, the fixed wing will be out of contact with the support column 83. The upward movement of the fixing ring 81 will drive the clamping rod 84 to move upward. The upward movement of the clamping rod 84 will be out of contact with the guide column 82. The two clamping rods 84 will move towards each other under the elastic force of the tension spring 85. The clamping rod 84 will contact the support column 83 and be squeezed by the support column 83. At this time, the tension spring 85 is still in a stretched state. When the clamping rod 84 moves upward to a clamping hole of the support column 83, the support column 83 no longer squeezes the clamping rod 84. At this time, the tension spring 85 resets and drives the clamping rod 84 to be clamped into the clamping hole of the support column 83. The two clamping rods 84 continue to move upward and drive the support column 83 to move upward. When the helipad 5 is landed, the helipad 5 moves downward, which drives the fixing ring 81 to move downward, and the fixing ring 81 moves downward, which drives the clamping rod 84 to move downward, and the clamping rod 84 moves downward, which drives the supporting column 83 to move downward. When the supporting column 83 moves downward to be blocked by the guide column 82, the supporting column 83 no longer moves downward. At this time, the clamping rod 84 continues to move downward and will be out of contact with the clamping hole of the supporting column 83, and the tension spring 85 is stretched. At the same time, the drone 6 continues to move downward, which makes the four fixed wings contact the tops of the four supporting columns 83 respectively. The four supporting columns 83 support the fixed wings of the drone 6 and keep the balance of the drone 6, reduce the shaking of the drone 6 after parking, and then assist the drone 6 to land and place more stably. The clamping rod 84 continues to move downward and will contact the guide column 82 again. The two clamping rods 84 continue to move downward and will be squeezed by the guide column 82 and move away from each other, and the tension spring 85 continues to be stretched.

[0044] Embodiment 3: Based on embodiment 2, Figure 6-Figure 16 As shown, it also includes a limiting mechanism, which is arranged on the main frame 1. The limiting mechanism includes a square box 91, a guide frame 92, a connecting spring 93 and an airbag 94. Four square boxes 91 are connected to the inner upper surface of the main frame 1 by bolts. The four square boxes 91 are slidably connected to the guide frames 92. Guide holes are provided in the four guide frames 92. The four fixed wings of the UAV 6 are respectively located in the four guide frames 92. The four guide frames 92 all pass through the apron 5. The four guide frames 92 are connected to the apron 5 by hooks. The top of each guide frame 92 is fixedly connected to an airbag 94. The airbag 94 is made of elastic material. A vent is provided on each airbag 94, and the vent is connected to the guide hole of the guide frame 92. The four blades of the UAV 6 are in contact with the four airbags 94 respectively.

[0045] At first, the apron 5 squeezes the connecting spring 93, the connecting spring 93 is in a compressed state, the airbag 94 is in an expanded state, and the four fixed wings of the UAV 6 are respectively located in the four guide frames 92. The upward movement of the UAV 6 will cause the blades to be out of contact with the airbag 94. The upward movement of the apron 5 will no longer squeeze the connecting spring 93, and the connecting spring 93 will reset. The apron 5 continues to move upward and will drive the guide frame 92 to move upward through the connecting spring 93. The upward movement of the guide frame 92 will draw the gas in the square box 91. Under the elastic effect of the airbag 94 and the pressure in the square box 91, the gas in the airbag 94 will flow into the square box 91 through the guide hole of the guide frame 92, so that the airbag 94 is restored; when the UAV 6 lands on the apron 5, the downward movement of the apron 5 will pass through the connecting spring 93. The guide frame 92 is driven to move downward. The downward movement of the guide frame 92 will squeeze the gas in the square box 91 into the airbag 94 through the guide hole, causing the airbag 94 to expand and become larger. At this time, the drone 6 has been positioned. The four airbags 94 expand and become larger to re-contact the blades of the drone 6 and limit the blades of the drone 6. Since there is a certain friction between the blades of the drone 6 and the airbags 94, the airbags 94 can reduce the self-rotation of the blades of the drone 6, so that the blades of the drone 6 can be more stably fixed when the drone 6 is charged in the main frame 1, thereby protecting the blades of the drone 6 and reducing the failure rate of the blades of the drone 6. If the guide frame 92 continues to move downward, it will be blocked by the square box 91 and will no longer move downward. If the apron 5 continues to move downward, the connecting spring 93 will be compressed.

[0046] Embodiment 4: Based on the embodiment 3, Figure 6-Figure 8 As shown, a protective rod 10 is also included. The inner top of the two sliding covers 2 are connected to two protective rods 10 by bolts. The two protective rods 10 are vertically arranged. The two protective rods 10 are in contact with the sliding positioning rod 71. The tripod of the drone 6 is located between the protective rod 10 and the sliding positioning rod 71.

[0047] Initially, the protection rod 10 contacts the sliding positioning rod 71 to lock the tripod of the drone 6. When the sliding positioning rod 71 moves upward, it will disengage from the protection rod 10, thereby unlocking the tripod of the drone 6. When the drone 6 is parked, the sliding positioning rod 71 will reset downward to re-contact the protection rod 10 and re-lock the two tripods of the drone 6 to further fix the drone 6. When the staff moves the main frame 1, the drone 6 can be prevented from shaking, allowing the drone 6 to charge more stably.

[0048] Embodiment 5: Based on Embodiment 4, Figure 3-Figure 5As shown, it also includes a protective ring 11. The inner tops of the two sliding covers 2 are connected with two protective rings 11 by bolts. The two protective rings 11 located on the same sliding cover 2 are symmetrically arranged, and the four protective rings 11 are respectively located on the tops of the four fixed wings of the drone 6.

[0049] Initially, the four protective rings 11 are respectively located on the top of the blades of the four drones 6. When the two sliding covers 2 move away from each other, the protective rings 11 will be driven to move, and the movement of the protective rings 11 will cause the protective rings 11 to lose contact with the blades of the drone 6. When the drone 6 is parked, the two sliding covers 2 will be reset in a direction close to each other, which will drive the protective rings 11 to be reset. The protective rings 11 will further protect the blades of the drone 6 to prevent the blades of the drone 6 from being damaged.

[0050] 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. A fixed landing platform for unmanned aerial vehicles, characterized in that: The invention comprises a main frame (1), a sliding cover (2), a stepping motor (3), a screw rod (4), a landing pad (5), a mounting plate (51) and a fixing mechanism. The left and right sides of the main frame (1) are both slidably connected with the sliding covers (2). The two sliding covers (2) are symmetrically arranged. The inner upper surface of the main frame (1) is fixedly connected with two stepping motors (3). The two stepping motors (3) are staggered. The output shafts of the two stepping motors (3) are both fixedly connected with the screw rods (4). The screw rods (4) are all rotatably connected to the main frame (1), a helipad (5) is connected between the two screw rods (4) by threads, the helipad (5) is slidably connected to the inner side of the main frame (1), the mounting plate (51) is fixedly connected to the bottom of the helipad (5), a drone (6) is placed on the top of the helipad (5), the drone (6) is provided with two tripods and four fixed wings, and the four fixed wings are respectively provided with blades, and the fixing mechanism is arranged on the helipad (5).

2. The fixed landing platform for unmanned aerial vehicles according to claim 1, characterized in that: Four guide grooves are provided on the main frame (1).

3. The fixed landing platform for unmanned aerial vehicles according to claim 1, characterized in that: The fixing mechanism comprises a sliding positioning rod (71), a sliding fixing rod (72), a short hydraulic cylinder (73), a long hydraulic cylinder (74), a piston rod (75), a pushing plate (76) and a hydraulic pipe (77); two sliding positioning rods (71) are slidingly connected to the apron (5); the two sliding positioning rods (71) are symmetrically arranged; two sliding fixing rods (72) are slidingly connected to the apron (5); the two sliding fixing rods (72) are symmetrically arranged; the two sliding fixing rods (72) are both located below the two sliding positioning rods (71); four short hydraulic cylinders (73) are fixedly connected to the upper side of the mounting plate (51); ), the upper side of the mounting plate (51) is fixedly connected with four long hydraulic cylinders (74), and the four long hydraulic cylinders (74) are slidably connected with piston rods (75), wherein two of the piston rods (75) are respectively fixedly connected with one end of two sliding positioning rods (71), and the other two of the piston rods (75) are respectively fixedly connected with one end of the sliding fixing rod (72), and the four short hydraulic cylinders (73) are slidably connected with push plates (76), and the four push plates (76) are respectively slidably connected with four guide grooves of the main frame (1), and a hydraulic pipe (77) is connected between the short hydraulic cylinder (73) and the long hydraulic cylinder (74).

4. The fixed landing platform for unmanned aerial vehicles according to claim 3, characterized in that: The two sliding positioning rods (71) and the two sliding fixing rods (72) form a "well" structure, and the UAV (6) is located in the middle of the "well", and the tripod of the UAV (6) is in contact with the sliding positioning rods (71) and the sliding fixing rods (72) respectively.

5. The fixed landing platform for unmanned aerial vehicles according to claim 3, characterized in that: The invention also comprises a supporting mechanism, which is arranged on the apron (5). The supporting mechanism comprises a fixing ring (81), a guide column (82), a support column (83), a clamping rod (84) and a tension spring (85). Eight fixing rings (81) are fixedly connected to the bottom of the apron (5), and two fixing rings (81) form a group. Four guide columns (82) are fixedly connected to the inner upper surface of the main frame (1). The four guide columns (82) are slidably connected to the support columns (83). The four support columns (83) are slidably connected to the apron (5). The tops of the four support columns (83) are respectively in contact with the four fixed wings of the unmanned aerial vehicle (6). Each fixing ring (81) is slidably connected to a clamping rod (84), and two clamping rods (84) form a group. Each clamping rod (84) is in contact with the guide column (82). A tension spring (85) is connected between the fixing ring (81) and the clamping rod (84).

6. The fixed landing platform for unmanned aerial vehicles according to claim 5, characterized in that: Two clamping holes are provided on the upper part of each of the support columns (83).

7. The fixed landing platform for unmanned aerial vehicles according to claim 5, characterized in that: The invention also comprises a limiting mechanism, which is arranged on the main frame (1), and comprises a square box (91), a guide frame (92), a connecting spring (93) and an air bag (94). Four square boxes (91) are fixedly connected to the inner upper surface of the main frame (1), and the four square boxes (91) are all slidably connected to the guide frame (92). The four guide frames (92) are provided with guide holes. The four fixed wings of the unmanned aerial vehicle (6) are respectively located on the four guide frames (92). ), the four guide frames (92) all pass through the apron (5), the four guide frames (92) and the apron (5) are respectively connected with connecting springs (93), the top of each guide frame (92) is fixedly connected with an airbag (94), the airbag (94) is made of elastic material, each airbag (94) is provided with a vent hole, and the vent hole is connected with the guide hole of the guide frame (92), and the four blades of the UAV (6) are respectively in contact with the four airbags (94).

8. The fixed landing platform for unmanned aerial vehicles according to claim 7, characterized in that: It also includes a protection rod (10), the inner tops of the two sliding covers (2) are fixedly connected to the two protection rods (10), the two protection rods (10) are in contact with the sliding positioning rod (71), and the tripod of the drone (6) is located between the protection rod (10) and the sliding positioning rod (71).

9. The fixed landing platform for unmanned aerial vehicles according to claim 8, characterized in that: It also includes a protective ring (11), the inner tops of the two sliding covers (2) are fixedly connected to two protective rings (11), the two protective rings (11) located on the same sliding cover (2) are symmetrically arranged, and the four protective rings (11) are respectively located on the tops of the four fixed wings of the drone (6).

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