Amphibious unmanned aerial vehicle landing gear structure

Abstract

The application discloses an amphibious unmanned aerial vehicle landing gear structure and relates to the technical field of unmanned aerial vehicle landing gears.The amphibious unmanned aerial vehicle landing gear structure comprises a ring-shaped frame installed on the main body of the unmanned aerial vehicle, connecting rods fixed on the two sides of the ring-shaped frame, mounting seats fixed at the bottom ends of the connecting rods, hollow bottom frames installed on the mounting seats, and the two hollow bottom frames are symmetric about the center of the ring-shaped frame.The application is provided with an arc-shaped extension piece, a propeller assembly and other structures, can control the arc-shaped rack movement according to the requirement, and further control the arc-shaped extension piece to extend from the end of the hollow bottom frame.Because the end of the hollow bottom frame is an arc-shaped structure of a quarter of a circle, the shape of the arc-shaped extension piece is adapted to the arc-shaped extension piece.When the arc-shaped extension piece extends, the end of the hollow bottom frame cooperates with the arc-shaped extension piece to form a C-shaped structure.At this time, the four propeller assemblies are in the working position, and the unmanned aerial vehicle can run on the water surface based on the control of the four propeller assemblies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned aerial vehicle landing gear, in particular to an amphibious unmanned aerial vehicle landing gear structure. BACKGROUND

[0002] With the rapid development of unmanned aerial vehicle technology, its application scenarios have gradually expanded from traditional aerial reconnaissance, aerial photography and other fields to complex and variable environments such as water surface operation and emergency rescue. However, the existing unmanned aerial vehicles face many problems when performing water tasks; the traditional landing gear structure is difficult to meet the dual needs of aerial flight and water navigation, resulting in poor body stability and low control efficiency.

[0003] Through retrieval, the application scheme with Chinese patent application number CN202120515349.4 discloses a water-air amphibious unmanned aerial vehicle rack structure and control system, including a water-air amphibious unmanned aerial vehicle rack structure and a water-air amphibious control system. The water-air amphibious unmanned aerial vehicle rack structure has an IP67 protection level, and the rack structure includes a shell, a cantilever, an aluminum alloy connecting piece, a top cover and a foot support. Through innovative structural design, water parking, water take-off and other functions can be realized without disassembling the floating cylinder. The water-air amphibious unmanned aerial vehicle rack structure and control system in the above document have the following disadvantages: they can only be parked and vertically taken off, but do not have the ability to move on water. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide an amphibious unmanned aerial vehicle landing gear structure.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] An amphibious unmanned aerial vehicle landing gear structure, comprising a ring-shaped frame mounted on the main body of the unmanned aerial vehicle, the ring-shaped frame being fixed with connecting rods on both sides, the bottom end of the connecting rod being fixed with a mounting seat, a hollow chassis being mounted on the mounting seat, the two hollow chassis being symmetric about the center of the ring-shaped frame; one end of the hollow chassis is a quarter-circular arc structure, an arc-shaped extension piece being slidably mounted on the inner wall of the end of the hollow chassis, the arc-shaped extension piece being an arc-shaped structure matching the end of the hollow chassis; a plurality of connecting columns being fixed to one end of the arc-shaped extension piece, a same propeller assembly being mounted on the connecting columns, the end of the arc-shaped extension piece close to the propeller assembly being a spherical structure;

[0007] The end side wall of the arc-shaped extension piece is fixed with an arc-shaped rack, a swing frame is installed on the arc-shaped rack, a support frame is fixed on the hollow base, the shaft of the swing frame is rotatably installed on the support frame, the shaft of the swing frame is matched with the arc center position of the arc-shaped extension piece; a position adjusting mechanism is installed on the hollow base, the position adjusting mechanism is used for controlling the position of the arc-shaped rack, so as to realize the extension and retraction of the arc-shaped extension piece; an air bag float assembly is installed at the bottom of the hollow base.

[0008] As a preferred of the present application: the position adjusting mechanism comprises:

[0009] A strip-shaped tooth rack is slidably installed on the inner wall of the mounting seat, and the strip-shaped tooth rack is engaged with the arc-shaped rack;

[0010] A vertical plate is fixed in the middle of the hollow base, and a guide frame is fixed on the top side of the vertical plate;

[0011] A lifting carriage is slidingly connected to the inner wall of the guide frame, and the lifting carriage and the guide frame are connected by a spring;

[0012] A transmission connecting rod is hingedly connected to one end of the strip-shaped tooth rack, and the other end of the transmission connecting rod is hingedly connected to the bottom end of the lifting carriage;

[0013] A pushing assembly is used to push the lifting carriage to move under the guidance of the guide frame.

[0014] As a preferred of the present application: the pushing assembly comprises:

[0015] An electric telescopic rod is installed on the annular frame through a support, and the output end of the electric telescopic rod is fixed with a pushing frame;

[0016] An electric motor is installed on the pushing frame;

[0017] A rotating disc is drivingly connected to the output end of the electric motor, a plurality of installation grooves are circumferentially arranged on the outer side of the rotating disc, an installation block is detachably installed in each installation groove, and the installation block installed in the installation groove is matched with the position of the lifting carriage.

[0018] As a preferred of the present application: a groove is arranged on the top of the lifting carriage, a protrusion is arranged on the bottom of the installation block, the protrusion is matched with the groove, and the width of the protrusion gradually increases from bottom to top.

[0019] As a preferred of the present application: a sealing ring is fixed at one end of the arc-shaped extension piece.

[0020] As a preferred of the present application: the air bag float assembly comprises:

[0021] An installation plate is fixed to the outer wall of the bottom of the hollow base;

[0022] The elastic air bag float is fixed at the top of the mounting plate, and the bottom surface of the elastic air bag float in the inflated state is located above the propeller assembly;

[0023] The air pump is installed on the side wall of the vertical plate, and the air pump is connected with the elastic air bag float through the air pipe.

[0024] As a preferred embodiment of the present application, the liquid supply part is installed on the annular frame, the output end of the liquid supply part is connected with the liquid pipe, one end of the liquid pipe is connected to the inside of the hollow base, a partition plate is arranged in the middle of the hollow base, the partition plate divides the inside of the hollow base into two independent chambers, and the number of the hollow bases is matched with the number of the independent chambers.

[0025] As a preferred embodiment of the present application, the liquid supply part comprises a liquid pump and a liquid storage tank, the liquid storage tank is installed on the annular frame, one end of the liquid pump is in communication with the inside of the liquid storage tank, and the other end of the liquid pump is connected with the liquid pipe.

[0026] As a preferred embodiment of the present application, one end of the liquid pipe extends into the arc-shaped extension piece, and a gravity ball is fixed outside the end of the liquid pipe.

[0027] As a preferred embodiment of the present application, the bottom end of the connecting column is fixed with a glue column.

[0028] The present application has the following advantages:

[0029] 1. The present application is provided with an arc-shaped extension piece, a propeller assembly and other structures, which can control the movement of the arc-shaped rack according to the requirements, and then control the extension of the arc-shaped extension piece from the end of the hollow base. Since the end of the hollow base is an arc-shaped structure of a quarter of a circle, the shape of the arc-shaped extension piece is matched with it. When the arc-shaped extension piece is extended, the end of the hollow base cooperates with the arc-shaped extension piece to form a C-shaped structure. At this time, the four propeller assemblies are in the working position, and the unmanned aerial vehicle can run on the water surface based on the control of the four propeller assemblies.

[0030] 2. The present application is provided with a position adjusting mechanism, which can drive the lifting slide to move based on the working of the pushing assembly, and then drive the strip-shaped toothed rack to translate under the transmission of the transmission connecting rod, so as to realize the movement control of the arc-shaped rack. In the resetting process, the spring can reset the structure.

[0031] 3. The present application is provided with a pushing assembly, which can be installed in the corresponding mounting groove according to the actual situation. When it is necessary to push the lifting slide, the motor drives the rotating disc to rotate to the specified position based on the set program control, and the electric telescopic rod works to drive the structure to move downward, so as to push the lifting slide at the corresponding position by the mounting block. Since the installation of the mounting block is controllable, the differential control of the lifting slide can be realized according to the installation of the mounting block.

[0032] 4. The airbag float assembly can be inflated or deflated based on the operation of the air pump to meet the operation requirements; by setting the liquid supply part and the independent chamber, a certain amount of liquid can be injected into the corresponding independent chamber according to the actual situation, so as to adjust the center of gravity of the unmanned aerial vehicle and make the structure more stable.

[0033] 5. The liquid pipe end is kept in the arc-shaped extension piece, so that the liquid can be better pumped and injected. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The amphibious unmanned aerial vehicle landing gear structure proposed by the application is installed on the structure schematic diagram of the unmanned aerial vehicle main body.

[0035] Figure 2 The structure schematic diagram of the amphibious unmanned aerial vehicle landing gear structure proposed by the application.

[0036] Figure 3 The structure schematic diagram of the amphibious unmanned aerial vehicle landing gear structure proposed by the application is installed on the structure schematic diagram of the unmanned aerial vehicle main body.

[0037] Figure 4 The structure schematic diagram of the hollow chassis of the amphibious unmanned aerial vehicle landing gear structure proposed by the application.

[0038] Figure 5 The structure schematic diagram of the mounting block and the lifting carriage of the amphibious unmanned aerial vehicle landing gear structure proposed by the application.

[0039] Figure 6 The structure schematic diagram of the hollow chassis and the arc-shaped extension piece of the amphibious unmanned aerial vehicle landing gear structure proposed by the application.

[0040] In the figure: 1 unmanned aerial vehicle main body; 2 swing frame; 3 arc-shaped rack; 4 hollow chassis; 5 connecting rod; 6 ring-shaped frame; 7 electric telescopic rod; 8 liquid storage tank; 9 motor; 10 mounting plate; 11 elastic airbag float; 12 air pump; 13 air pipe; 14 strip-shaped rack; 15 liquid pump; 16 transmission connecting rod; 17 liquid pipe; 18 mounting seat; 19 mounting block; 20 groove; 21 guide frame; 22 vertical plate; 23 spring; 24 protruding block; 25 mounting groove; 26 rotating disc; 27 sealing ring; 28 support frame; 29 connecting column; 30 propeller assembly; 31 rubber column; 32 gravity ball; 33 arc-shaped extension piece; 34 lifting carriage. DETAILED DESCRIPTION

[0041] The technical solutions of the application will be further described in detail below in combination with specific embodiments.

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] Example 1: A landing gear structure for an amphibious unmanned aerial vehicle, such as Figures 1-6 As shown, the device includes a ring frame 6 mounted on the main body 1 of the drone. Connecting rods 5 are fixed on both sides of the ring frame 6. A mounting base 18 is fixed to the bottom end of the connecting rods 5. A hollow base frame 4 is mounted on the mounting base 18. The two hollow base frames 4 are symmetrical about the center of the ring frame 6. One end of the hollow base frame 4 is a quarter-circle arc structure. An arc-shaped extension 33 is slidably mounted on the inner wall of the end of the hollow base frame 4. The arc-shaped extension 33 has an arc structure that matches the end of the hollow base frame 4. Multiple connecting posts 29 are fixed to one end of the arc-shaped extension 33. The same propeller assembly 30 is mounted on the connecting posts 29. The end of the arc-shaped extension 33 near the propeller assembly 30 has a spherical structure.

[0044] An arc-shaped rack 3 is fixed to the end sidewall of the arc-shaped extension 33. A swing frame 2 is mounted on the arc-shaped rack 3. A support frame 28 is fixed on the hollow base frame 4. The axis of the swing frame 2 is rotatably mounted on the support frame 28. The axis of the swing frame 2 is adapted to the arc center position of the arc-shaped extension 33. A position adjustment mechanism is mounted on the hollow base frame 4. The position adjustment mechanism is used to control the position of the arc-shaped rack 3 to realize the extension and retraction of the arc-shaped extension 33. An airbag float assembly is mounted at the bottom of the hollow base frame 4.

[0045] By setting up structures such as the arc-shaped extension 33 and the propeller assembly 30, the movement of the arc-shaped rack 3 can be controlled according to requirements, thereby controlling the arc-shaped extension 33 to extend out of the end of the hollow base frame 4. Since the end of the hollow base frame 4 is a quarter-circle arc structure, the shape of the arc-shaped extension 33 is adapted to it. When the arc-shaped extension 33 extends, the end of the hollow base frame 4 and the arc-shaped extension 33 cooperate to form a C-shaped structure. At this time, the four propeller assemblies 30 are in the working position, and the purpose of the UAV to travel on the water surface can be achieved by controlling the four propeller assemblies 30.

[0046] To facilitate adjustment of the position of the curved extension 33; such as Figure 3 , Figure 4 As shown, the position adjustment mechanism includes:

[0047] The strip toothed frame 14 is slidably mounted on the inner wall of the mounting base 18, and the strip toothed frame 14 meshes with the arc-shaped toothed rack 3;

[0048] The vertical plate 22 is fixed in the middle of the hollow base 4, and the top side of the vertical plate 22 is fixed with a guide frame 21;

[0049] The lifting slide 34 is connected to the inner wall of the guide frame 21 in a sliding manner, and the lifting slide 34 and the guide frame 21 are connected through the spring 23;

[0050] The transmission connecting rod 16 is hingedly connected to the strip-shaped tooth rack 14 at one end, and is hingedly connected to the bottom end of the lifting slide 34 at the other end;

[0051] The pushing assembly is used to push the lifting slide 34 to move under the guidance of the guide frame 21;

[0052] By setting the position adjusting mechanism, the lifting slide 34 can be pushed to move based on the working of the pushing assembly, and then the strip-shaped tooth rack 14 is driven to translate under the transmission of the transmission connecting rod 16, so as to realize the movement control of the arc-shaped tooth rack 3. In the resetting process, the spring 23 can promote the structure to reset.

[0053] In order to differentiate control; as Figure 5 The pushing assembly comprises:

[0054] The electric telescopic rod 7 is installed on the annular frame 6 through a support, and the output end of the electric telescopic rod 7 is fixed with a pushing frame;

[0055] The motor 9 is installed on the pushing frame;

[0056] The rotating disc 26 is in transmission connection with the output end of the motor 9 through a shaft, and the outer side of the rotating disc 26 is provided with circumferentially distributed installation grooves 25, and the installation grooves 25 are detachably installed with installation blocks 19, and the installation blocks 19 installed on the installation grooves 25 are adapted to the positions of the lifting slides 34;

[0057] By setting the pushing assembly, the installation blocks 19 can be installed in the corresponding installation grooves 25 according to the actual situation, and when it is needed to push the lifting slides 34, the motor 9 controls the rotating disc 26 to rotate to the specified position based on the set program, and the electric telescopic rod 7 works to drive the structure to move downward, so as to push the lifting slides 34 at the corresponding positions through the installation blocks 19. Since the installation of the installation blocks 19 is controllable, the differential control of the lifting slides 34 can be realized according to the installation of the installation blocks 19;

[0058] For example, when two installation blocks 19 are positioned corresponding to two lifting slides 34, the two lifting slides 34 can be simultaneously pushed to move, and if one installation block 19 is positioned corresponding to one lifting slide 34, and the other lifting slide 34 is not installed with an installation block 19, only one lifting slide 34 is pushed to move at a time.

[0059] For more stable to push; such as Figure 5 As shown, the lifting carriage 34 top is provided with a groove 20, the mounting block 19 bottom is provided with a protrusion 24, the protrusion 24 is matched with the groove 20, the width of the protrusion 24 gradually increases from bottom to top;

[0060] Through this kind of form design, the lifting carriage 34 can be more stable to push, and the reliability is improved.

[0061] In order to protect the sealing between the arc extension 33 and the hollow chassis 4; such as Figure 6 As shown, one end of the arc extension 33 is fixed with a sealing ring 27.

[0062] In order to be able to float on the water reliably; such as Figure 2 、 Figure 3 As shown, the gas bag float assembly comprises:

[0063] The mounting plate 10 is fixed to the bottom outer wall of the hollow chassis 4;

[0064] The elastic gas bag float 11 is fixed to the bottom of the mounting plate 10, and the bottom surface height of the elastic gas bag float 11 in the inflated state is above the propeller assembly 30;

[0065] The air pump 12 is installed on the side wall of the vertical plate 22, and the air pump 12 is connected with the elastic gas bag float 11 through the air pipe 13;

[0066] By setting the gas bag float assembly, the elastic gas bag float 11 can be inflated or exhausted based on the work of the air pump 12, so as to meet the operation requirement;

[0067] Among them, the air pipe 13 can also be provided with a valve body for controlling the on-off of the air pipe 13, which is not described here.

[0068] In order to facilitate the adjustment of the unmanned aerial vehicle balance; such as Figure 2 、 Figure 6 As shown, the annular frame 6 is provided with a liquid supply part, the output end of the liquid supply part is connected with a liquid pipe 17, one end of the liquid pipe 17 is connected to the inside of the hollow chassis 4, a blocking plate is arranged in the middle of the hollow chassis 4, the blocking plate divides the inner cavity of the hollow chassis 4 into two independent chambers, and the number of the hollow chassis 4 is matched with the number of the independent chambers;

[0069] By setting the liquid supply part and the independent chamber, a certain amount of liquid can be injected into the corresponding independent chamber according to the actual situation, so as to adjust the center of gravity of the unmanned aerial vehicle, and make the structure more stable;

[0070] The unmanned aerial vehicle body 1 should contain a detection module for detecting the attitude of the unmanned aerial vehicle body 1, which can refer to the existing technology, such as sensor fusion measurement, which is not described here.

[0071] In order to facilitate liquid supply, as shown in Figure 2 , Figure 3 , the liquid supply part includes a liquid pump 15 and a liquid storage tank 8, the liquid storage tank 8 is installed on the annular frame 6, one end of the liquid pump 15 is in communication with the liquid storage tank 8, and the other end of the liquid pump 15 is connected with a liquid pipe 17.

[0072] In order to more reliably supply and pump liquid, as shown in Figure 6 , one end of the liquid pipe 17 extends into the arc-shaped extension 33, and a gravity ball 32 is fixed outside the end of the liquid pipe 17;

[0073] By setting the gravity ball 32 and the like, the end of the liquid pipe 17 can be kept in the arc-shaped extension 33, so as to better pump and inject liquid.

[0074] In order to improve the landing stability, as shown in Figure 6 , the connecting column 29 is fixed with a rubber column 31 at the bottom end.

[0075] For the parts of the application not disclosed in detail, such as necessary control modules, pressure relief structures, specific control methods, signal transmission methods, power supply methods and the like, those skilled in the art can ensure the smooth implementation of the scheme of the application based on common sense, normal thinking logic and existing technology.

[0076] The above is only the preferred specific implementation of the application, but the protection scope of the application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A landing gear structure for an amphibious unmanned aerial vehicle, characterized in that, The device includes a ring frame (6) mounted on the main body (1) of the UAV. Connecting rods (5) are fixed on both sides of the ring frame (6). A mounting base (18) is fixed at the bottom of the connecting rods (5). A hollow base frame (4) is mounted on the mounting base (18). The two hollow base frames (4) are symmetrical about the center of the ring frame (6). One end of the hollow base frame (4) is a quarter-circle arc structure. An arc extension (33) is slidably mounted on the inner wall of the end of the hollow base frame (4). The arc extension (33) has an arc structure that matches the end of the hollow base frame (4). Multiple connecting columns (29) are fixed at one end of the arc extension (33). The same propeller assembly (30) is mounted on the connecting columns (29). The end of the arc extension (33) near the propeller assembly (30) has a spherical structure. The end sidewall of the arc-shaped extension (33) is fixed with an arc-shaped rack (3), a swing frame (2) is mounted on the arc-shaped rack (3), and a support frame (28) is fixed on the hollow base frame (4). The shaft of the swing frame (2) is rotatably mounted on the support frame (28), and the shaft of the swing frame (2) is adapted to the arc center position of the arc-shaped extension (33). A position adjustment mechanism is installed on the hollow base frame (4), which is used to control the position of the arc-shaped rack (3) to realize the extension and retraction of the arc-shaped extension (33). An airbag float assembly is installed at the bottom of the hollow base frame (4).

2. The amphibious unmanned aerial vehicle landing gear structure according to claim 1, characterized in that, The position adjustment mechanism includes: The strip toothed frame (14) is slidably mounted on the inner wall of the mounting base (18), and the strip toothed frame (14) meshes with the arc-shaped toothed rack (3); The upright plate (22) is fixed in the middle of the hollow base frame (4), and the top side of the upright plate (22) is fixed with a guide frame (21). The lifting slide (34) slides up and down and is connected to the inner wall of the guide frame (21). The lifting slide (34) and the guide frame (21) are connected by a spring (23). The transmission link (16) is hinged at one end to the rack (14) and the other end is hinged to the bottom end of the lifting slide (34). The push assembly is used to push the lifting carriage (34) to move under the guidance of the guide frame (21).

3. The amphibious unmanned aerial vehicle landing gear structure according to claim 2, characterized in that, The actuating component includes: Electric telescopic rod (7), the electric telescopic rod (7) is installed on the ring frame (6) by a bracket, and the output end of the electric telescopic rod (7) is fixed with a pusher; Motor (9), motor (9) is mounted on push frame; The rotating disk (26) has its shaft connected to the output end of the motor (9). The rotating disk (26) has a circumferentially distributed mounting groove (25) on its outer side. The mounting block (19) is detachably installed in the mounting groove (25). The mounting block (19) installed on the mounting groove (25) is adapted to the position of the lifting slide (34).

4. The amphibious unmanned aerial vehicle landing gear structure according to claim 3, characterized in that, The top of the lifting slide (34) is provided with a groove (20), and the bottom of the mounting block (19) is provided with a protrusion (24). The protrusion (24) and the groove (20) are matched in position, and the width of the protrusion (24) gradually increases from bottom to top.

5. The amphibious unmanned aerial vehicle landing gear structure according to claim 1, characterized in that, A sealing ring (27) is fixed to one end of the arc-shaped extension (33).

6. The amphibious unmanned aerial vehicle landing gear structure according to claim 1, characterized in that, The airbag float assembly includes: Mounting plate (10), mounting plate (10) is fixed to the bottom outer wall of hollow base frame (4); Elastic airbag float (11), the top of the elastic airbag float (11) is fixed to the bottom of the mounting plate (10), and the bottom surface of the elastic airbag float (11) in the inflated state is above the propeller assembly (30); An air pump (12) is installed on the side wall of the upright plate (22). The air pump (12) is connected to the elastic airbag float (11) through an air pipe (13).

7. The amphibious unmanned aerial vehicle landing gear structure according to claim 1, characterized in that, The ring frame (6) is equipped with a liquid supply unit. The output end of the liquid supply unit is connected to a liquid pipe (17). One end of the liquid pipe (17) is connected to the inside of the hollow base frame (4). A baffle plate is provided in the middle of the hollow base frame (4). The baffle plate divides the inner cavity of the hollow base frame (4) into two independent chambers. The number of hollow base frames (4) is matched with the number of independent chambers.

8. The amphibious unmanned aerial vehicle landing gear structure according to claim 7, characterized in that, The liquid supply unit includes a liquid pump (15) and a liquid storage tank (8). The liquid storage tank (8) is installed on a ring frame (6). One end of the liquid pump (15) is connected to the inside of the liquid storage tank (8), and the other end of the liquid pump (15) is connected to a liquid pipe (17).

9. The amphibious unmanned aerial vehicle landing gear structure according to claim 8, characterized in that, One end of the liquid tube (17) extends into the arc-shaped extension (33), and a gravity ball (32) is fixed to the outer side of the end of the liquid tube (17).

10. The amphibious unmanned aerial vehicle landing gear structure according to claim 1, characterized in that, A glue column (31) is fixed at the bottom of the connecting column (29).

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