Unmanned aerial vehicle arm retraction device

Abstract

The utility model relates to unmanned plane technical field discloses unmanned plane machine arm take -up device, including the machine base and the hinge in the machine base four sides frame arm, frame arm outer wall one end all are fixedly connected with the fixed ring, all are fixedly connected with the elastic band on the fixed ring, the positive pole magnetic ball is arranged in the elastic band inner lower extreme, frame arm front end all are fixedly connected with the motor seat, the motor seat output end fixedly connected with the bearing seat, bearing seat is provided with two blade bodies, bearing seat all are set up two second negative pole magnetic groove, the machine base top end is equipped with the limit support, the limit support four corner all are seted up the open slot, the open slot inner wall is provided with the expansion air bag, the expansion air bag top end and the open slot inner top between the installation pressure sensor, the utility model discloses through the expansion air bag through pressure sensor triggers the air pump inflation, the tight package blade after inflation forms the buffer protection layer, avoids the blade damage in transportation.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a UAV arm extension and retraction device. Background Technology

[0002] With the increasing application of drones in fields such as aerial photography, logistics, inspection, and emergency rescue, the portability, reliability, and protective performance of the equipment have become core design elements.

[0003] Traditional retraction and deployment methods lack effective limiting and protective structures for the blades. When the boom is folded into its retracted state, the blades cannot be fixed due to the rotational freedom of the bearing housing. This can lead to hard impacts with components such as the base and limiting frame, and abnormal rotation of the blades due to bumps during transportation, resulting in problems such as blade deformation and dynamic balance failure. Utility Model Content

[0004] The purpose of this invention is to provide a drone arm extension and retraction device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drone arm retraction and extension device, including a base and frame arms hinged to the four sides of the base, wherein each frame arm is provided with an elastic clamp lock.

[0006] Each frame arm has a fixed ring fixedly connected to one end of its outer wall. Each fixed ring has an elastic band fixedly connected to it. A positive magnetic ball is provided at the lower end of the elastic band. Each frame arm has a fixed motor base fixedly connected to its front end. Each motor base has a fixed bearing seat fixedly connected to its output end. Each bearing seat has two blade bodies and two second negative magnetic slots. A limit frame is installed at the top of the base. Each limit frame has an opening slot at one of its four corners. An expansion airbag is provided on the inner wall of each opening slot. A pressure sensor is installed between the top of the expansion airbag and the top of the opening slot. A cross-shaped receiving cavity is provided inside the limit frame. An air pump is installed in the middle of the receiving cavity.

[0007] Preferably, two clamps are fixedly connected to both outer walls of the base, and the frame arm is clamped inside the clamps.

[0008] Preferably, support feet are installed on both sides of the bottom end of the base.

[0009] Preferably, a first negative magnetic groove is provided on one side of the top of the fixing ring, and the diameter of the positive magnetic ball is adapted to the diameter of the first negative magnetic groove and the second negative magnetic groove and is magnetically connected to each other.

[0010] Preferably, the air pump and the pressure sensor are electrically connected, and both air pumps are connected to the expansion airbag through air guide tubes.

[0011] Compared with the prior art, the beneficial effects of this utility model are: through the magnetic connection of the fixing ring, elastic band and positive and negative magnetic grooves, the bearing seat and blades can be mechanically limited during folding to prevent the blades from rotating and colliding. The expansion airbag inside the limiting frame is inflated by the air pump triggered by the pressure sensor. After expansion, it tightly wraps around the blade to form a buffer protective layer to avoid damage to the blades during transportation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the frame arm deployment structure of this utility model;

[0013] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0014] Figure 3 This is a schematic diagram of the frame arm folding structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the limiting frame of this utility model.

[0016] In the diagram: 1. Base; 11. Clamp; 12. Support foot; 2. Frame arm; 201. First negative magnetic groove; 202. Second negative magnetic groove; 21. Elastic clamp locker; 22. Fixing ring; 23. Elastic band; 24. Positive magnetic ball; 25. Motor base; 26. Bearing housing; 27. Blade body; 3. Limiting frame; 301. Opening slot; 302. Receiving cavity; 31. Expansion airbag; 32. Air pump; 33. Pressure sensor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 The present invention provides the following technical solution:

[0019] Example 1: A drone arm retraction and extension device, including a base 1 and frame arms 2 hinged to the four sides of the base 1. Each frame arm 2 is equipped with an elastic clamp lock 21. Two clamps 11 are fixedly connected to the two outer walls of the base 1, and the frame arms 2 are locked in the clamps 11. Support feet 12 are installed on both sides of the bottom end of the base 1.

[0020] In use, the elastic clamp lock 21 set on the frame arm 2 can release the limit on the frame arm 2, thereby realizing the folding and unfolding of the frame arm 2. The frame arm 2 can be locked into the clamp 11 to ensure the stable storage state of the frame arm 2. The support foot 12 set at the bottom of the base 1 can effectively support the whole.

[0021] Example 2: The technical solution of this example, which differs from Example 1, includes: a fixing ring 22 is fixedly connected to one end of the outer wall of the frame arm 2, and an elastic band 23 is fixedly connected to each fixing ring 22. A positive magnetic ball 24 is provided at the lower end of the elastic band 23. A motor base 25 is fixedly connected to the front end of the frame arm 2, and a bearing seat 26 is fixedly connected to the output end of the motor base 25. Two blade bodies 27 are provided on the bearing seat 26, and two second negative magnetic grooves 202 are provided in each bearing seat 26. A limit frame 3 is installed at the top of the base 1, and an opening groove 301 is provided at each of the four included corners of the limit frame 3. An expansion airbag 3 is provided on the inner wall of the opening groove 301. 1. A pressure sensor 33 is installed between the top of the expansion airbag 31 and the top of the opening groove 301. A cross-shaped receiving cavity 302 is opened inside the limiting frame 3. An air pump 32 is installed in the middle of the receiving cavity 302. A first negative magnetic groove 201 is opened on one side of the top of the fixing ring 22. The diameter of the positive magnetic ball 24 is adapted to the diameter of the first negative magnetic groove 201 and the second negative magnetic groove 202 and is magnetically connected to each other. The air pump 32 and the pressure sensor 33 are electrically connected. The air pump 32 is connected to the expansion airbag 31 through the air guide tube. The air pump 32 and the pressure sensor 33 will transmit data to the remote control operation terminal.

[0022] In use, when the frame arm 2 is folded into place, the positive magnetic ball 24 precisely engages with the second negative magnetic groove 202 of the bearing seat 26, locking the bearing seat 26 through magnetic attraction and preventing the blade body 27 from rotating on the bearing seat 26, thus avoiding the risk of collision caused by the free rotation of the blade body 27 after folding. When the frame arm 2 is folded to the limiting frame 3 at the top of the base 1, the blade body 27 extends into the opening groove 301 along with the frame arm 2. When the blade body 27 contacts the inner wall of the expansion airbag 31, it triggers the pressure sensor 33 at the top of the airbag. The pressure sensor 33 transmits the signal to the air pump 32 in the receiving cavity 302. After the air pump 32 is started, it inflates the expansion airbag 31 through the air guide tube. After the expansion airbag 31 is inflated, it expands and tightly wraps the front end of the frame arm 2 and the blade body 27, forming an elastic buffer layer on the surface of the blade body 27, thereby effectively protecting the blade body 27.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drone arm retraction and extension device, comprising a base (1) and frame arms (2) hinged to the four sides of the base (1), wherein each frame arm (2) is provided with an elastic clamp lock (21). Its features are: One end of the outer wall of each frame arm (2) is fixedly connected to a fixing ring (22), and an elastic band (23) is fixedly connected to each fixing ring (22). A positive magnetic ball (24) is provided at the lower end of the elastic band (23). A motor seat (25) is fixedly connected to the front end of each frame arm (2). A bearing seat (26) is fixedly connected to the output end of the motor seat (25). Two blade bodies (27) are provided on the bearing seat (26). Two second negative poles are provided on each bearing seat (26). The magnetic groove (202) has a limit frame (3) installed at the top of the base (1). The limit frame (3) has opening slots (301) at the four corners. An expansion airbag (31) is provided on the inner wall of the opening slot (301). A pressure sensor (33) is installed between the top of the expansion airbag (31) and the top of the opening slot (301). A cross-shaped receiving cavity (302) is provided inside the limit frame (3). An air pump (32) is installed in the middle of the receiving cavity (302).

2. The UAV arm retraction and extension device according to claim 1, characterized in that: The base (1) has two clamps (11) fixedly connected to its two outer walls, and the frame arm (2) is clamped in the clamps (11).

3. The UAV arm retraction and extension device according to claim 1, characterized in that: Support feet (12) are installed on both sides of the bottom end of the base (1).

4. The UAV arm retraction and extension device according to claim 1, characterized in that: The top of the fixed ring (22) has a first negative magnetic groove (201) on one side. The diameter of the positive magnetic ball (24) is matched with the diameter of the first negative magnetic groove (201) and the second negative magnetic groove (202) and they are magnetically connected to each other.

5. The UAV arm retraction and extension device according to claim 1, characterized in that: The air pump (32) and the pressure sensor (33) are electrically connected, and the air pump (32) is connected to the expansion airbag (31) through the air guide tube.

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