A frame for a bridge inspection drone

Abstract

This application relates to a UAV frame for bridge inspection, belonging to the technical field of UAVs. It includes a UAV body with a connecting frame at its bottom. This application utilizes a plug-in engagement between a plug and the connecting frame, and a limiting block driven by a push spring in a snap-fit ​​assembly to achieve automatic initial positioning. Simultaneously, a bidirectional lead screw driven by a first servo motor in the limiting assembly drives a moving frame and its locking block for a secure secondary locking. This significantly simplifies the installation and disassembly process of the UAV body and the connecting frame. Furthermore, a buffer assembly located on the outside of the connecting frame, with its support plate sliding within the damping sleeve of the support leg via a slide rod, compresses the buffer spring. This effectively absorbs and dissipates the impact energy generated during UAV takeoff and landing or sudden collisions, maximizing the protection of the precision components inside the UAV body and the shooting and detection devices within the mounting frame. This significantly reduces data acquisition errors and improves operational safety and data reliability.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV frame for bridge inspection. Background Technology

[0002] With their flexibility, efficiency, and ability to penetrate complex structural areas, drones are gradually becoming important inspection tools. As the core carrier of the drone's flight system and various inspection devices, the rationality and functionality of the drone frame's structural design directly affect the stability and efficiency of inspection operations. A good frame not only needs to ensure the safe flight of the drone itself but also needs to meet the requirements for rapid installation and precise positioning of different inspection equipment.

[0003] However, the existing drone racks and drone installation process are cumbersome and have poor compatibility with testing devices. They require complex debugging and modification to complete the equipment installation, which seriously affects the preparation efficiency of testing work. At the same time, traditional racks generally lack effective cushioning components. When drones take off and land, encounter airflow disturbances or sudden collisions, they cannot effectively absorb the impact force. This can easily lead to damage to the precision components inside the drone and may also cause data acquisition errors in the testing device, greatly limiting the safety and data reliability of bridge inspection operations. Utility Model Content

[0004] The purpose of this application is to provide a frame for a bridge inspection drone, which uses a snap-fit ​​component to automatically and initially limit the drone body, and then uses a limiting component for secondary locking. At the same time, the buffer component can effectively absorb and dissipate the impact energy generated by the drone's take-off and landing or sudden collision, thus maximizing the protection of the precision components inside the drone body and the shooting and detection device in the mounting frame. This solves the problems mentioned in the background art.

[0005] This application provides a bridge inspection drone frame with the following technical solution: It includes a drone body, a connecting frame at the bottom of the drone body, two plugs fixedly connected to the outer side of the drone body, and the outer side of the plugs inserted into the inner side of the connecting frame. Two sets of symmetrical locking components are provided on the inner side of the connecting frame. Each locking component includes a component cavity opened inside the connecting frame. A movable plate is slidably connected to the inner side of the component cavity. Two push springs are fixedly connected to one side of the movable plate, and the other end of the push springs is fixedly connected to the inner wall of the component cavity. A limit block is fixedly connected to the other side of the movable plate, and the outer side of the limit block is inserted into the inner side of the plug. A limit component is provided on the inner side of the connecting frame. The limit component includes a bidirectional screw rotatably connected to the inner side of the connecting frame. Two symmetrical movable frames are threadedly connected to the outer side of the bidirectional screw. A locking block is fixedly connected to the two movable frames at their far ends, and the outer side of the locking block is inserted into the outer side of the plug. Two sets of symmetrical buffer components are provided on the outer side of the connecting frame.

[0006] By adopting the above technical solution, the connecting frame and the drone body are connected through a combination of insert blocks, snap-fit ​​components, and limiting components. When installing the drone body, the insert blocks are inserted into the connecting frame, and the spring pushes the moving plate to insert the limiting block into the insert blocks, thereby initially fixing the drone body. Then, the first servo motor is started to drive the bidirectional lead screw to lock the snap-fit ​​block into place, thus performing a secondary limiting and fixing of the drone body. This simplifies the installation process of the drone frame and the drone and improves the efficiency of the preparation for testing.

[0007] Preferably, the limiting block has an inclined surface.

[0008] By adopting the above technical solution, the inclined surface design of the limiting block can automatically compress the push spring and guide the limiting block to retract during the insertion process, which simplifies the installation operation steps and improves the ease of installation.

[0009] Preferably, two guide grooves are formed on the inner side of the component cavity, the outer side of the movable plate is slidably connected to the inner side of the guide grooves, and a pull rod is fixedly connected to the outer side of the movable plate, and the pull rod extends through the inner side of the connecting frame to the outer side of the connecting frame.

[0010] By adopting the above technical solution, the guide groove ensures the straightness and stability of the moving plate's movement within the component cavity, preventing it from tilting or getting stuck.

[0011] Preferably, a first servo motor is fixedly embedded on the outer side of the connecting frame, and the output end of the first servo motor is fixedly connected to one end of a bidirectional lead screw. A protective box is provided on the outer side of the first servo motor, and the protective box is fixedly connected to the outer side of the connecting frame by bolts.

[0012] By adopting the above technical solution, the protective box effectively protects the first servo motor from external environmental corrosion and physical collisions, improving the durability and safety of the equipment in the complex environment of bridge inspection.

[0013] Preferably, the limiting component further includes a guide rod fixedly connected to the inner side of the connecting frame, and the inner sides of the two movable frames are slidably connected to the outer side of the guide rod.

[0014] By adopting the above technical solution, the guide rod passes through the two moving frames, providing precise linear guidance for the movement of the moving frames under the bidirectional screw drive, preventing the moving frames from twisting or deviating, ensuring that the locking block can accurately and stably cooperate with the insertion block, and enhancing the working stability and reliability of the limiting component.

[0015] Preferably, the buffer assembly includes a fixed plate fixedly connected to the outside of the connecting frame, a support leg fixedly connected to the bottom surface of the fixed plate, a damping sleeve fixedly connected to the inner side of each of the two support legs, a sliding rod slidably connected to the inner side of each of the two damping sleeves, a support plate fixedly connected to the bottom surface of each of the two sliding rods, and a buffer spring sleeved on the outer side of each of the two sliding rods, with the two ends of the buffer spring fixedly connected to the outer side of the support plate and the outer side of the support leg, respectively.

[0016] By adopting the above technical solution, the elastic deformation of the buffer spring and the sliding friction damping between the damping sleeve and the slide bar can effectively absorb and dissipate impact energy during the take-off and landing of the UAV, greatly reducing the degree to which the impact force is transmitted to the main body of the UAV and the shooting and detection device mounted on the connecting frame, protecting the internal precision components, reducing the error of detection data acquisition, and improving the safety and data reliability of bridge inspection operations.

[0017] Preferably, a turntable is rotatably connected to the outer side of the connecting frame, a conical toothed ring is fixedly connected to the outer side of the turntable, a second servo motor is fixedly connected to the outer side of the connecting frame, a bevel gear is fixedly connected to the output end of the second servo motor, the bevel gear and the bevel toothed ring mesh with each other, and a U-shaped frame is fixedly connected to the outer side of the turntable.

[0018] By adopting the above technical solution, the second servo motor drives the bevel gear to mesh with the bevel gear ring, causing the turntable to rotate. This, in turn, drives the U-shaped frame and the imaging detection device to adjust the horizontal angle, expanding the detection range and meeting the detection needs of different locations on the bridge.

[0019] Preferably, a mounting frame is rotatably connected to the inner side of the U-shaped frame, a third servo motor is fixedly embedded on the outer side of the U-shaped frame, and the output end of the third servo motor is fixedly connected to the outer side of the U-shaped frame. A shooting detection device is fixedly installed on the inner side of the mounting frame.

[0020] By adopting the above technical solution, the third servo motor drives the mounting frame to rotate, thereby enabling the shooting and detection device to adjust its angle in the vertical direction. Combined with the rotation of the turntable, it can detect the bridge from all directions and multiple angles, improving the adaptability of the detection device and the flexibility of the detection work.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] This bridge inspection drone frame utilizes a plug-in connection between the plug and the connecting frame, and an automatic initial limit is achieved by a limit block driven by a push spring in the snap-fit ​​assembly. Simultaneously, a bidirectional lead screw driven by a first servo motor in the limit assembly drives the moving frame and its locking block for a secure secondary locking. This significantly simplifies the installation and disassembly process of the drone body and the connecting frame, greatly improving the efficiency and ease of adaptation of the inspection device. Secondly, the buffer assembly located on the outside of the connecting frame has a support plate that slides within the damping sleeve of the support leg via a slide rod and compresses the buffer spring. This effectively absorbs and dissipates the impact energy generated by the drone's take-off and landing or sudden collisions, maximizing the protection of the precision components inside the drone body and the shooting and inspection device within the mounting frame. This significantly reduces data acquisition errors and improves operational safety and data reliability. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0024] Figure 2 This is a cross-sectional structural diagram of the connecting frame of this application;

[0025] Figure 3 This is a schematic diagram of the internal structure of the connecting frame and the imaging and detection device in this application;

[0026] Figure 4 This is a schematic diagram of the internal structure of the card receiving component and the limiting component in this application;

[0027] Figure 5 This is an exploded structural diagram of the movable frame, insert block, and movable plate of this application;

[0028] Figure 6 This is a three-dimensional structural diagram of the buffer component of this application.

[0029] In the picture:

[0030] 1. UAV body; 2. Connecting frame; 3. Insert block; 4. Snap-fit ​​assembly; 401. Assembly cavity; 402. Push spring; 403. Moving plate; 404. Limiting block; 405. Guide groove; 406. Pull rod; 5. Limiting assembly; 501. Bidirectional lead screw; 502. Moving frame; 503. First servo motor; 504. Snap-fit ​​block; 505. Guide rod; 6. Buffer assembly; 601. Fixing plate; 602. Support leg; 603. Damping sleeve; 604. Slide rod; 605. Buffer spring; 606. Support plate; 7. Protective box; 8. Turntable; 9. Conical gear ring; 10. Second servo motor; 11. Conical gear; 12. U-shaped frame; 13. Mounting frame; 14. Third servo motor; 15. Shooting and detection device. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0032] Example 1: A frame for a bridge inspection drone includes a drone body 1. A connecting frame 2 is provided at the bottom of the drone body 1. Two insert blocks 3 are fixedly connected to the outer side of the drone body 1, and the outer side of the insert blocks 3 is inserted into the inner side of the connecting frame 2. Two sets of symmetrical snap-fit ​​components 4 are provided on the inner side of the connecting frame 2. The snap-fit ​​components 4 include a component cavity 401 opened inside the connecting frame 2. A moving plate 403 is slidably connected to the inner side of the component cavity 401. Two push springs 402 are fixedly connected to one side of the moving plate 403, and the other end of the push springs 402 is fixedly connected to the inner wall of the component cavity 401. A limit block 404 is fixedly connected to the other side of the moving plate 403, and the outer side of the limit block 404 is inserted into the inner side of the insert blocks 3. The limiting block 404 driven by the push spring 402 achieves automatic initial limiting. The external shape of the limiting block 404 is set with an inclined surface. The inclined surface design of the limiting block 404 can automatically compress the push spring 402 and guide the limiting block 404 to retract during the insertion of the insert 3, which simplifies the installation operation steps and improves the ease of installation. Two guide grooves 405 are opened on the inner side of the component cavity 401. The outer side of the moving plate 403 is slidably connected to the inner side of the guide groove 405. A pull rod 406 is fixedly connected to the outer side of the moving plate 403, and the pull rod 406 extends through the inner side of the connecting frame 2 to the outer side of the connecting frame 2. The guide groove 405 ensures the linearity and stability of the moving plate 403 in the component cavity 401 and prevents it from deviating and jamming.

[0033] A limiting component 5 is provided on the inner side of the connecting frame 2. The limiting component 5 includes a bidirectional lead screw 501 rotatably connected to the inner side of the connecting frame 2. Two symmetrical movable frames 502 are threadedly connected to the outer side of the bidirectional lead screw 501. Each movable frame 502 has a locking block 504 fixedly connected to one end away from the other. The outer side of the locking block 504 is inserted into the outer side of the insert block 3. The bidirectional lead screw 501 driven by the first servo motor 503 drives the movable frame 502 and the locking block 504 on it to perform a stable secondary locking, which significantly simplifies the installation and disassembly process of the UAV body 1 and the connecting frame 2, and greatly improves the efficiency and adaptability of the testing device. The first servo motor 503 is fixedly embedded on the outer side of the connecting frame 2, and the output end of the first servo motor 503 is fixedly connected to one end of the bidirectional lead screw 501. At the end, a protective box 7 is provided on the outside of the first servo motor 503. The protective box 7 is fixedly connected to the outside of the connecting frame 2 by bolts. The protective box 7 effectively protects the first servo motor 503 from external environmental corrosion and physical collisions, improving the durability and safety of the equipment in the complex environment of bridge inspection. The limiting component 5 also includes a guide rod 505 fixedly connected to the inside of the connecting frame 2. The inside of the two moving frames 502 is slidably connected to the outside of the guide rod 505. The guide rod 505 passes through the two moving frames 502, providing precise linear guidance for the movement of the moving frames 502 driven by the bidirectional lead screw 501, preventing the moving frames 502 from twisting or deviating, ensuring that the locking block 504 can accurately and stably cooperate with the insertion block 3, and enhancing the working stability and reliability of the limiting component 5.

[0034] Two sets of symmetrical buffer components 6 are provided on the outer side of the connecting frame 2. The buffer components 6 include a fixed plate 601 fixedly connected to the outer side of the connecting frame 2. The bottom surface of the fixed plate 601 is fixedly connected to the support leg 602. The inner side of each support leg 602 is fixedly connected to a damping sleeve 603. The inner side of each damping sleeve 603 is slidably connected to a slide rod 604. The bottom surface of each slide rod 604 is fixedly connected to a support plate 606. The outer side of each slide rod 604 is fitted with a buffer spring 605. The two ends of the buffer spring 605 are respectively fixedly connected to the outer side of the support plate 606 and the outer side of the support leg 602. By utilizing the elastic deformation of the buffer spring 605 and the sliding friction damping between the damping sleeve 603 and the slide rod 604, the impact energy can be effectively absorbed and dissipated during the take-off and landing of the UAV. This significantly reduces the degree to which the impact force is transmitted to the UAV body 1 and the shooting and detection device 15 mounted on the connecting frame 2, protecting the internal precision components, reducing the error in the detection data acquisition, and improving the safety and data reliability of bridge inspection operations.

[0035] Example 2: A bridge inspection drone frame, comprising a turntable 8 rotatably connected to the outer side of a frame 2, a conical gear ring 9 fixedly connected to the outer side of the turntable 8, a second servo motor 10 fixedly connected to the outer side of the frame 2, a bevel gear 11 fixedly connected to the output end of the second servo motor 10, the bevel gear 11 meshing with the bevel gear ring 9, and a U-shaped frame 12 fixedly connected to the outer side of the turntable 8. The second servo motor 10 drives the bevel gear 11 to mesh with the bevel gear ring 9, causing the turntable 8 to rotate, thereby driving the U-shaped frame 12 and the imaging and detection device 15 to adjust their horizontal angle, thus expanding the magnification. The detection range meets the detection needs of different locations on the bridge. The inner side of the U-shaped frame 12 is rotatably connected to the mounting frame 13, and the outer side of the U-shaped frame 12 is fixedly embedded with a third servo motor 14. The output end of the third servo motor 14 is fixedly connected to the outer side of the U-shaped frame 12. The inner side of the mounting frame 13 is fixedly installed with a shooting detection device 15. The third servo motor 14 drives the mounting frame 13 to rotate, realizing the vertical angle adjustment of the shooting detection device 15. With the rotation of the turntable 8, the bridge can be detected from all directions and multiple angles, improving the adaptability of the detection device and the flexibility of the detection work.

[0036] The implementation principle of this embodiment is as follows: During installation, the insert block 3 at the bottom of the UAV body 1 is aligned with the insertion port of the connecting frame 2 and inserted. During insertion, the insert block 3 contacts the inclined surface of the limiting block 404, pushing the limiting block 404 and the moving plate 403 to slide backward in the guide groove 405 against the elastic force of the pushing spring 402. When the insert block 3 is fully inserted, the limiting block 404 automatically pops out under the action of the pushing spring 402 and locks into the corresponding recess on the inner side of the insert block 3, achieving initial positioning and preventing dislodgement. Subsequently, the first servo motor 503 is started, driving the bidirectional lead screw 501 to rotate. Under the constraint of the guide rod 505, the two moving frames 502 move synchronously towards each other along the lead screw, driving the locking block 504 on it to insert into the locking groove on the outer side of the insert block 3, achieving final stable locking. The protective box 7 protects the first servo motor 503. During drone takeoff and landing, the impact force is transmitted to the buffer assembly 6 through the support leg 602. At this time, the support plate 606 is subjected to force, causing the slide bar 604 to slide within the damping sleeve 603, while simultaneously compressing the buffer spring 605. The damping sleeve 603 provides sliding friction damping, and the buffer spring 605 absorbs energy through elastic deformation. The two work together to effectively attenuate the impact force and protect the equipment above. During bridge inspection, the second servo motor 10 drives the turntable 8 to rotate horizontally through the meshing of the bevel gear 11 and the bevel gear ring 9, driving the shooting and detection device 15 on the U-shaped frame 12 and the mounting frame 13 to perform horizontal scanning. Then, the third servo motor 14 drives the mounting frame 13 to rotate within the U-shaped frame 12, adjusting the pitch angle of the shooting and detection device 15. With the coordinated work of the two sets of servo motors, the shooting and detection device 15 can flexibly adjust to the optimal observation angle to perform all-round, multi-angle shooting and inspection of the bridge structure.

[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A frame for a bridge inspection drone, comprising a drone body (1), characterized in that: The bottom of the drone body (1) is provided with a connecting frame (2). Two plugs (3) are fixedly connected to the outside of the drone body (1), and the outside of the plugs (3) is inserted into the inside of the connecting frame (2). The inside of the connecting frame (2) is provided with two sets of symmetrical snap-fit ​​components (4). The snap-fit ​​components (4) include a component cavity (401) opened inside the connecting frame (2). A moving plate (403) is slidably connected to the inside of the component cavity (401). Two push springs (402) are fixedly connected to one side of the moving plate (403), and the other end of the push springs (402) is fixedly connected to the inner wall of the component cavity (401). A limiting block (404) is fixedly connected to the other side of the moving plate (403), and the outer side of the limiting block (404) is inserted into the inner side of the insert block (3). A limiting component (5) is provided on the inner side of the connecting frame (2). The limiting component (5) includes a bidirectional screw (501) rotatably connected to the inner side of the connecting frame (2). Two symmetrical moving frames (502) are threadedly connected to the outer side of the bidirectional screw (501). A locking block (504) is fixedly connected to the two moving frames (502) at their ends that are far apart from each other. The outer side of the locking block (504) is inserted into the outer side of the insert block (3). Two sets of symmetrical buffer components (6) are provided on the outer side of the connecting frame (2).

2. The frame for a bridge inspection drone according to claim 1, characterized in that: The limiting block (404) has an inclined surface on its exterior.

3. The frame for a bridge inspection drone according to claim 1, characterized in that: Two guide grooves (405) are provided on the inner side of the component cavity (401). The outer side of the moving plate (403) is slidably connected to the inner side of the guide groove (405). A pull rod (406) is fixedly connected to the outer side of the moving plate (403), and the pull rod (406) extends through the inner side of the connecting frame (2) to the outside of the connecting frame (2).

4. The UAV frame for bridge inspection according to claim 1, characterized in that: The outer side of the connecting frame (2) is fixedly inlaid with a first servo motor (503), and the output end of the first servo motor (503) is fixedly connected to one end of the bidirectional lead screw (501). A protective box (7) is provided on the outer side of the first servo motor (503), and the protective box (7) is fixedly connected to the outer side of the connecting frame (2) by bolts.

5. The frame for a bridge inspection drone according to claim 1, characterized in that: The limiting component (5) also includes a guide rod (505) fixedly connected to the inside of the connecting frame (2), and the inner sides of the two movable frames (502) are slidably connected to the outer side of the guide rod (505).

6. The frame for a bridge inspection drone according to claim 1, characterized in that: The buffer assembly (6) includes a fixed plate (601) fixedly connected to the outside of the connecting frame (2). The bottom surface of the fixed plate (601) is fixedly connected to a support leg (602). The inner sides of the two support legs (602) are fixedly connected to damping sleeves (603). The inner sides of the two damping sleeves (603) are slidably connected to sliding rods (604). The bottom surfaces of the two sliding rods (604) are fixedly connected to a support plate (606). The outer sides of the two sliding rods (604) are fitted with buffer springs (605), and the two ends of the buffer springs (605) are respectively fixedly connected to the outer side of the support plate (606) and the outer side of the support leg (602).

7. The frame for a bridge inspection drone according to claim 1, characterized in that: A turntable (8) is rotatably connected to the outside of the connecting frame (2). A conical toothed ring (9) is fixedly connected to the outside of the turntable (8). A second servo motor (10) is fixedly connected to the outside of the connecting frame (2). A bevel gear (11) is fixedly connected to the output end of the second servo motor (10). The bevel gear (11) and the bevel toothed ring (9) mesh with each other. A U-shaped frame (12) is fixedly connected to the outside of the turntable (8).

8. The frame for a bridge inspection drone according to claim 7, characterized in that: The inner side of the U-shaped frame (12) is rotatably connected to the mounting frame (13), the outer side of the U-shaped frame (12) is fixedly inlaid with a third servo motor (14), and the output end of the third servo motor (14) is fixedly connected to the outer side of the U-shaped frame (12). The inner side of the mounting frame (13) is fixedly installed with a shooting detection device (15).

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