Large-angle turnover device for unmanned aerial vehicle

Abstract

The unmanned aerial vehicle large-angle turnover device comprises a supporting frame, a turnover mechanism and a winch mechanism, the turnover mechanism and the winch mechanism are arranged on the supporting frame, the supporting frame is formed by welding a plurality of structural parts, and a pulley used in cooperation with the winch mechanism is arranged at the top, close to one end, of the supporting frame; the overturning mechanism comprises two bearing seats arranged on the supporting frame, bearings are connected to the two bearing seats in a penetrating mode, a lower clamp capable of freely rotating in the radial direction of the bearings is connected to the inner sides of the two bearings in a clamped mode, an upper clamp is arranged above the lower clamp, an unmanned aerial vehicle head is placed between the upper clamp and the lower clamp, and the connecting position of the upper clamp and the lower clamp is fixed through a tightening handle. The winch mechanism comprises a winch arranged on the supporting frame, a steel wire rope extending out of the winch penetrates through the pulley to be connected with a D-shaped shackle, and the D-shaped shackle is connected with a lifting lug on the unmanned aerial vehicle by installing a lifting bolt. The unmanned aerial vehicle can be overturned at a large angle, the accuracy of the overturning angle of the unmanned aerial vehicle is ensured, and the thrust line test requirement and the test efficiency of the unmanned aerial vehicle are met.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) equipment detection, and in particular to a large-angle flipping device for an UAV. Background Art

[0002] During the initial stages of a drone's flight, the booster engine provides a certain level of altitude and speed. The booster engine is connected to the drone's cup-shaped structure via a tapered slot, a tapered head, and a mounting platform, tilted at a 15° angle. Due to factors such as machining precision and assembly errors, the booster engine's thrust line and the drone's center of mass may not be aligned. Therefore, the drone is flipped 105° vertically, its center of mass is measured, and the booster engine's thrust line and thrust angle are adjusted until the booster engine's thrust line aligns with the drone's center of mass, ensuring a stable climb within the booster engine's operating time.

[0003] Currently, there is no device that can safely and conveniently flip a drone at a large angle for thrust line testing, and it is difficult to ensure the accuracy of the flip angle. Therefore, it is necessary to design a large-angle flip device for drones to improve the efficiency of drone thrust line testing and meet the requirements of a safe, reliable, and economical flip process. Summary of the Invention

[0004] In order to meet the above technical requirements, the purpose of the present invention is to provide a large-angle flip device for drones, which fully considers the safety, convenience and other issues during the large-angle flip of the drone. The drone can be easily flipped 105° in the vertical direction and then thrust line testing can be performed. It can not only facilitate the measurement of its center of mass and adjustment of the thrust line angle, but also ensure the accuracy of the flip angle.

[0005] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a large-angle flip device for a UAV, comprising a support frame and a flip mechanism and a winch mechanism respectively provided on the support frame, wherein the support frame is welded from a plurality of structural parts, and a pulley for use with the winch mechanism is provided near the top of one end of the support frame; The flipping mechanism includes two bearing seats provided on the support frame, both bearing seats are connected with bearings, the inner sides of the two bearings are clamped with lower clamps that can rotate freely along the radial direction of the bearings, and an upper clamp is provided above the lower clamp. The drone head is placed between the upper clamp and the lower clamp, and the connection between the upper clamp and the lower clamp is fixed by a tight handle. The outer sides of the two bearings are respectively sleeved and fixed with a limit block and a support arm, and the end of the support arm is provided with a support groove for supporting the drone wing. An elastic screw mechanism is also provided at the end of the bearing seat. When the upper clamp and the lower clamp on which the drone head is placed are flipped more than 90 degrees, the limit block controls the flipping angle by contacting the elastic screw mechanism. The winch mechanism includes a winch arranged on a support frame, a steel wire rope extending from the winch passes through a pulley and is connected to a D-shaped shackle, and the D-shaped shackle is connected to a lifting ear on the drone by installing a lifting eye screw.

[0006] Furthermore, a polyurethane anti-collision foam plate is provided near the bottom of the pulley on the support frame; four shock-absorbing universal wheels for braking are provided around the bottom of the support frame; and a handle and a support base for supporting the tail of the drone fuselage are provided near the other end of the support frame.

[0007] Polyurethane rubber pads are provided at the contact points between the inner sides of the upper and lower clamps in the flip mechanism and the drone head, and at the contact points between the support groove and the drone wings.

[0008] The elastic screw mechanism includes a support platform, inside which is a screw that can move freely up and down. The screw is sleeved with a buffer spring above the support platform, and the screw is provided with a positioning nut below the support platform. When the drone head flips more than 90 degrees, the limit block contacts the screw to make it move downward and compress the buffer spring. After the drone head flips to the right angle, the flip angle is positioned by tightening the positioning nut.

[0009] The winch uses a turbine worm winch, which pulls the drone head to rotate around the bearing and flip it to a certain angle.

[0010] The support frame in the present invention is welded with a Q235A steel frame structure, which has a simple structure and a low center of gravity, ensuring the stability of the entire flipping device. At the same time, polyurethane anti-collision foam is installed at a certain height of the support frame. After the drone is flipped into place, it can not only support the drone but also prevent scratches; the flipping mechanism can ensure the accuracy of the drone's flipping angle; the turbine worm winch in the winch mechanism has a load of 500kg, which can fully meet the theoretical calculated value of the pulling force required during the drone flipping process, making the flipping process labor-saving and convenient.

[0011] The beneficial effects of the present invention are: low cost, short processing cycle, simple assembly, and simple operation; in field tests or when there is no crane, the drone can be flipped at a large angle to meet its thrust line test requirements; it can ensure the accuracy of the drone's flip angle and improve the efficiency of the drone's thrust line test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The structure and technical features of the present invention are further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the support frame in the present invention.

[0015] Figure 3It is a structural schematic diagram of the turning mechanism in the present invention.

[0016] Figure 4 It is a structural schematic diagram of the winch mechanism in the present invention.

[0017] Attachment Figure 1-4 Among them, 1. Support frame; 2. Flip mechanism; 3. Winch mechanism; 4. Support arm; 5. Support seat; 6. Handle; 7. Shock-absorbing universal wheel; 8. Pulley; 9. Polyurethane anti-collision foam board; 10. Bearing seat; 11. Bearing; 12. Positioning handle; 13. Upper clamp; 14. Limit block; 15. Support groove, 16. Polyurethane rubber cushion; 17. Buffer spring; 18. Lower clamp; 19. Screw; 20. Positioning nut; 21. Winch; 22. Wire rope; 23. D-type shackle; 24. Eye screw. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0019] Attachment Figure 1-4 This is an embodiment of the present invention, which discloses a large-angle flip device for a drone, which consists of a support frame 1, a flip mechanism 2 and a winch mechanism 3. Figure 1 shown.

[0020] Attachment Figure 2 As shown, the support frame 1 is provided with a support seat 5, a handle 6, a universal wheel 7, a pulley 8 and a polyurethane anti-collision foam board 9. The support frame adopts a Q235A steel frame structure to support the weight of the entire UAV to ensure its rigidity and strength; the support seat 5 is made of polyurethane foam board, which is designed according to the shape of the booster engine and the installation angle, and plays a better supporting role when the UAV is placed horizontally on the support frame 1; at the same time, a handle 6 is welded at one end of the support frame 1 to facilitate the application of force when manually pushing the flipping device; for ease of movement, the UAV flipping device is equipped with four 5-inch shock-absorbing universal wheels 7 with brakes, and the load capacity of a single wheel is 125kg; the pulley 8 is installed on the top of the support frame 1 and is used in conjunction with the winch mechanism 3; the polyurethane anti-collision foam 9 is installed at a certain height at the front end of the support frame 1. After the UAV is flipped into place, it can not only support the UAV, but also prevent scratches.

[0021] Attachment Figure 3As shown, the flip mechanism 2 is installed at the front end of the support frame 1 and consists of a bearing seat 10, a bearing 11, a tightening handle 12, an upper clamp 13, a limit block 14, a support arm 4, a polyurethane rubber pad 16, a buffer spring 17, a lower clamp 18, a screw 19 and a positioning nut 20. In order to realize the flipping of the drone, the bearing 11 is installed on the bearing seat 10, and the upper clamp 13 and the lower clamp 18 cooperate with the tightening handle 12 to firmly fix the head of the drone so that it can rotate flexibly around the bearing 11. At the same time, the upper and lower clamps are internally provided with polyurethane rubber pads 16 in the contact parts with the drone to protect the surface of the drone; the left and right support arms 4 are designed according to the shape of the wings and are provided with support grooves 15 at the ends. During the flipping process of the drone, they can rotate synchronously with the bearing 11, so that the two wings are effectively supported. At the same time, polyurethane rubber pads 16 are also placed in the contact parts with the wings. Since the drone may tip over to one side after flipping 90°, and in order to limit the extreme point of the drone's flipping and ensure the accuracy of the flipping angle, a buffer spring 17 is provided on the flipping structure 2; the buffer spring 17 works by contacting the limit block 14 installed on the bearing 11 through the screw 19. During the drone flipping process, the limit block 14 can rotate synchronously. When the drone flips upward at an angle less than 90°, the limit block 14 will not contact the screw 19. When the flipping angle is greater than 90°, the drone will tip over to one side due to its own gravity. At this time, the limit block 14 contacts the screw 19, and the screw 19 moves downward to slowly compress the buffer spring 17 until the drone flips into place. The positioning nut 20 at the lower end of the screw 19 is tightened to control the stroke of the buffer spring 17 and accurately control the flipping angle.

[0022] Attachment Figure 4 As shown, the winch mechanism 3 is installed on the left side of the support frame 1 and consists of a VS-500 worm gear winch 21, a wire rope 22, a stainless steel D-type shackle 23 and a lifting eye screw 24. The VS-500 worm gear winch 21 is self-locking and has a load of 500 kg, which is fully capable of meeting the theoretical calculated value of the pulling force required during the flipping of the drone, making the flipping process labor-saving and convenient. The wire rope 22 is connected to the worm gear winch 21 and the stainless steel D-type shackle 23 through the pulley 8. The lifting eye screw 24 is installed on the stainless steel D-type shackle 23 and is connected and fixed to the corresponding positions of the lifting eye and the rear lifting eye on the fuselage.

[0023] The use process of the present invention is as follows: first, lock the four shock-absorbing universal wheels 7 of the large-angle flip device of the drone to prevent shaking, then place the drone in a suitable position on the support frame 1, so that the head of the drone is placed in the lower clamp 18, and the support seat 5 supports the booster engine; then install the upper clamp 13, and tighten the upper clamp 13 and the lower clamp 18 through the tightening handle 12; adjust the position of the left and right support arms 15 so that the two wings of the drone are effectively supported, and then connect and fix the eye screws 24 to the middle and rear lifting ears of the fuselage; then use the VS-500 turbine worm winch 21 to pull the drone through the wire rope 22 The drone is rotated so that the part fixed in the clamp can rotate around the bearing 11, and the tail end of the fuselage gradually leaves the rear support seat 5 to realize the upward flipping of the drone; through theoretical calculation, a buffer spring 17 with reasonable stiffness is designed and used in conjunction with the screw 19. When the flip angle of the drone is greater than 90°, the drone can be supported to prevent it from tipping to one side. At the same time, the limit block 14 is used to limit the extreme point of the drone's flipping. When the drone is flipped into place, the positioning nut 20 is tightened to fix the position of the buffer spring 17 to ensure the accuracy of the flip angle. At the same time, the fuselage is in contact with the anti-collision foam 9 to avoid scratches on the surface.

[0024] The above illustrates and describes the basic principles and key features of the present invention. The stiffness of the support frame, the required pulling force for the drone's flip, and the specifications of the worm gear winch have all been theoretically calculated and verified through experimental testing. The channel steel, lifting rings, and winch used are all standard components and are commercially available. The specific connection methods for each component utilize conventional methods such as mature bolts and welding, and the machinery, components, and equipment all utilize conventional models.

Claims

1. A large-angle flip device for a drone, characterized by: It includes a support frame and a turning mechanism and a winch mechanism respectively arranged on the support frame. The support frame is welded by multiple structural parts. A pulley is provided near the top of one end of the support frame for use with the winch mechanism. The flipping mechanism includes two bearing seats provided on the support frame, both bearing seats are connected with bearings, the inner sides of the two bearings are clamped with lower clamps that can rotate freely along the radial direction of the bearings, and an upper clamp is provided above the lower clamp. The drone head is placed between the upper clamp and the lower clamp, and the connection between the upper clamp and the lower clamp is fixed by a tight handle. The outer sides of the two bearings are respectively sleeved and fixed with a limit block and a support arm, and the end of the support arm is provided with a support groove for supporting the drone wing. An elastic screw mechanism is also provided at the end of the bearing seat. When the upper clamp and the lower clamp on which the drone head is placed are flipped more than 90 degrees, the limit block controls the flipping angle by contacting the elastic screw mechanism. The winch mechanism includes a winch arranged on a support frame, a steel wire rope extending from the winch passes through a pulley and is connected to a D-shaped shackle, and the D-shaped shackle is connected to a lifting ear on the drone by installing a lifting eye screw.

2. The large-angle flip device for a drone according to claim 1, characterized in that: A polyurethane anti-collision foam plate is provided near the bottom of the pulley of the support frame; four shock-absorbing universal wheels for braking are provided around the bottom of the support frame; a handle and a support base for supporting the tail of the drone fuselage are provided near the other end of the support frame.

3. The large-angle flip device for a drone according to claim 1, characterized in that: Polyurethane rubber pads are provided at the contact points between the inner sides of the upper and lower clamps in the flip mechanism and the drone head, and at the contact points between the support groove and the drone wings.

4. The large-angle flip device for a drone according to claim 1, characterized in that: The elastic screw mechanism includes a support platform, inside which is a screw that can move freely up and down. The screw is sleeved with a buffer spring above the support platform, and the screw is provided with a positioning nut below the support platform. When the drone head flips more than 90 degrees, the limit block contacts the screw to make it move downward and compress the buffer spring. After the drone head flips to the right angle, the flip angle is positioned by tightening the positioning nut.

5. The large-angle flip device for a drone according to claim 1, characterized in that: The winch uses a turbine worm winch, which pulls the drone head to rotate around the bearing and flip it to a certain angle.

Images