Folding structure of small unmanned rotorcraft

Abstract

The utility model relates to the technical field of folding unmanned aerial vehicles, and discloses a small rotor unmanned aerial vehicle folding structure which comprises a connecting column and a fixing frame fixedly connected to one end of the connecting column, one end of the fixing frame is rotationally connected with a vehicle arm, the outer side of the connecting column is fixedly connected with a locking hole, and the fixing frame is provided with a fixing mechanism. The fixing mechanism is used for conducting overturning and fixing operation on the vehicle arm and comprises a sliding rod connected to the fixing frame in a sliding mode. Through the design of the fixing frame, the connecting rod, the hook block and the sliding rod, the clearance phenomenon of the two parts of the folding mechanism is effectively restrained, the stability and reliability of the structure are further enhanced, the multi-joint folding mechanism can keep certain fuselage strength while reducing the size and light weight of the folded unmanned aerial vehicle, and the unmanned aerial vehicle is convenient to use. A multi-joint folding mechanism is a folding mode used by most of existing foldable unmanned aerial vehicles, but the problems that an existing multi-joint folding mechanism is heavy in weight, inconvenient to install and large in size are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of folding UAVs, in particular to a folding structure of a small rotary-wing UAV. Background Art

[0002] Small rotor drones are small, unmanned aircraft that are radio-controlled, capable of vertical takeoff and landing, and have a certain degree of autonomous flight capability. They are commonly used in aerial photography, agricultural plant protection, circuit inspection, and other fields, bringing great convenience to people's production and life. Currently, the folding arm mechanism of drones is usually achieved by using foldable materials or foldable structures. However, existing drone folding structures still have some problems in actual use.

[0003] For example, application number CN202222008749.3 discloses a folding structure of a drone, whose arm includes a first support rod connected to the drone body at the rear end and a second support rod with a propeller at the front end. The rear end of the second support rod is hinged to the front end of the first support rod so that the second support rod can rotate relative to the first support rod to form a folded support arm. A locking piece is movably sleeved on the second support rod, and an external thread is provided at the front end of the first support rod, which has the characteristics of convenient carrying and storage. The multi-joint folding mechanism can reduce the size of the drone after folding while maintaining a certain body strength. The multi-joint folding mechanism is the folding method used by most existing foldable drones, but the existing multi-joint folding mechanism is heavy, inconvenient to install, and large in size.

[0004] In order to solve the above problems, a folding structure of a small rotor UAV is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a folding structure for a small rotor UAV. By adopting the device, the multi-joint folding mechanism can reduce the size of the UAV after folding and make it lightweight while maintaining a certain fuselage strength. The multi-joint folding mechanism is the folding method used by most existing foldable UAVs, but the existing multi-joint folding mechanism is heavy, inconvenient to install, and has a large volume.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a folding structure of a small rotor UAV, including a connecting column and a fixing frame fixedly connected to one end of the connecting column, one end of the fixing frame is rotatably connected to an organic arm, the outer side of the connecting column is fixedly connected with a locking hole, and the fixing frame is provided with a fixing mechanism, which is used to flip and fix the organic arm, and the fixing mechanism includes a sliding rod slidably connected to the fixing frame.

[0007] Preferably, a pin hole is provided on the outer side of the connecting column, and a support block is fixedly connected between the connecting column and the fixing frame.

[0008] By adopting the above-mentioned structural design and arranging the pin holes and the support blocks, the strength of the entire device is improved, which facilitates subsequent use.

[0009] Preferably, one end of the sliding rod is fixedly connected to a pulling block, and the pulling block is located outside the fixing frame.

[0010] The above structural design and the provision of the pulling block make the fixing process of the machine arm more convenient, thereby improving the convenience during use.

[0011] Preferably, the bottom of the pulling block is fixedly connected to a connecting rod, and the bottom of the pulling block is fixedly connected to a reset spring.

[0012] With the above-mentioned structural design, the reset spring is provided so that the connecting rod can automatically produce a reset effect, thereby improving the use efficiency, increasing the pre-tightening force of the lock, and reducing the generation of empty space.

[0013] Preferably, one end of the return spring is fixedly connected to the inside of the fixing frame, the top of the arm is fixedly connected to a hook block, and the hook block is provided with an eccentric groove.

[0014] With the above structural design, the hook block is arranged so that the hook block can cooperate with the connecting rod to keep the machine arm in a fixed state, thereby promoting the work process.

[0015] Preferably, two groups of hook blocks are provided, the hook blocks match the connecting rods, the top of the arm is also fixedly connected with a boss, the boss matches the fixing frame, the top of the arm is also fixedly connected with a connecting block, and the fixing frame is rotatably connected to the arm through the connecting block.

[0016] With the above structural design, the locating of the boss and the fixing frame and the close contact between the end faces effectively suppress the void phenomenon of the two parts of the folding mechanism.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This application effectively suppresses the virtual position phenomenon of the two parts of the folding mechanism through the arrangement of a fixed frame, a connecting rod, a hook block and a sliding rod, further enhances the stability and reliability of the structure, and solves the problem that the multi-joint folding mechanism can reduce the size of the drone after folding while maintaining a certain fuselage strength. The multi-joint folding mechanism is the folding method used by most existing foldable drones, but the existing multi-joint folding mechanism is heavy, inconvenient to install, and has a large volume.

[0019] 2. This application improves the installation strength of the overall structure by setting locking holes, pin holes and support blocks, which facilitates subsequent use and solves the problem that the overall strength of the existing drone folding structure is not high during installation, and it is easy to fall off when connected to the outside world, which is not conducive to use.

[0020] 3. This application improves the rotational damping of the fixed frame and the machine arm through the setting of the hook block and the connecting block, and further reduces the effect of the connection virtual position through the setting of the eccentric groove of the hook block, thereby solving the problem that the damping of the existing multi-joint folding mechanism is small, and it is easy to rotate due to external forces during the connection process, and it is also easy to have the connection virtual position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the locking hole and pin hole of the utility model;

[0023] Figure 3 This is a structural diagram of the sliding rod and pulling block of the utility model;

[0024] Figure 4 This is a structural diagram of the hook block and connecting block of the utility model.

[0025] In the figure: 1. Connecting column; 11. Locking hole; 12. Pin hole; 13. Support block; 2. Fixed frame; 21. Sliding rod; 211. Pulling block; 212. Connecting rod; 213. Return spring; 3. Machine arm; 31. Hook block; 32. Boss; 33. Connecting block. DETAILED DESCRIPTION

[0026] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0027] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0028] Combine Figures 1-4The folding structure of a small rotor UAV includes a connecting column 1 and a fixing frame 2 fixedly connected to one end of the connecting column 1. One end of the fixing frame 2 is rotatably connected to an organic arm 3. A locking hole 11 is fixedly connected to the outer side of the connecting column 1. The fixing frame 2 is provided with a fixing mechanism, which is used to flip and fix the organic arm 3. The fixing mechanism includes a sliding rod 21 slidably connected to the fixing frame 2.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] Example 1:

[0031] In order to solve the problem that the multi-joint folding mechanism can reduce the size of the drone after folding and make it lightweight while maintaining a certain body strength, the multi-joint folding mechanism is the folding method used by most existing foldable drones, but the existing multi-joint folding mechanism is heavy, inconvenient to install, and has a large volume, this embodiment discloses the following technical solutions, specifically as follows Figures 1-4 As shown, a pin hole 12 is provided on the outer side of the connecting column 1, and a supporting block 13 is fixedly connected between the connecting column 1 and the fixing frame 2, one end of the sliding rod 21 is fixedly connected to a pulling block 211, and the pulling block 211 is located on the outer side of the fixing frame 2, and the bottom of the pulling block 211 is fixedly connected to a connecting rod 212, and the bottom of the pulling block 211 is fixedly connected to a return spring 213, one end of the return spring 213 is fixedly connected to the inside of the fixing frame 2, and the top of the arm 3 is fixedly connected to a hook block 31, and the hook block 31 is provided with an eccentric groove, and the hook block 31 is provided with two groups, and the hook block 31 matches the connecting rod 212, and the top of the arm 3 is also fixedly connected to a boss 32, and the boss 32 matches the fixing frame 2, and the top of the arm 3 is also fixedly connected to the connecting block 33, and the fixing frame 2 is rotatably connected to the arm 3 through the connecting block 33, and the overall structure is fixed by the locking hole 11. By setting the pin hole 12, the locking hole 11 can be matched with the overall structure. The installation strength of the structure is improved. The connection relationship between the fixing frame 2 and the arm 3 is rotatably connected, so that the overall structure can rotate freely. When the arm 3 and the fixing frame 2 need to be unfolded, the pulling block 211 can be pressed. The pulling block 211 drives the sliding rod 21 to move, thereby moving the two groups of connecting rods 212. The connecting rod 212 moves and separates the connecting rod 212 from the hook block 31, thereby rotating the arm 3. At this time, the overall device is in the unfolded state. When it needs to be folded, after pressing the pulling block 211, the hook block 31 is in place, and the pulling block 211 is released. Under the action of the return spring 213, the connecting rod 212 moves and is fixed to the hook block 31, and the folding operation is completed. The setting of the support block 13 improves the connection strength of the overall structure. The boss 32 uses negative tolerance matching technology to effectively suppress the virtual position phenomenon of the two parts of the folding mechanism, further enhancing the stability and reliability of the structure.

[0032] It should be noted that the above-mentioned electrical components are equipped with power supplies and their control methods are prior art. In order to avoid redundant description, they are uniformly described here. Moreover, this application is mainly used to protect mechanical equipment, so the control methods and circuit connections are not explained in detail. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A folding structure of a small rotary-wing UAV, comprising a connecting column (1) and a fixing frame (2) fixedly connected to one end of the connecting column (1), characterized in that: One end of the fixing frame (2) is rotatably connected to the machine arm (3), and the outer side of the connecting column (1) is fixedly connected to a locking hole (11). The fixing frame (2) is provided with a fixing mechanism, and the fixing mechanism is used to perform a flipping and fixing operation on the machine arm (3). The fixing mechanism includes a sliding rod (21) slidably connected to the fixing frame (2).

2. The folding structure of the small rotary wing UAV according to claim 1, characterized in that: A pin hole (12) is provided on the outer side of the connecting column (1), and a support block (13) is fixedly connected between the connecting column (1) and the fixing frame (2).

3. The folding structure of the small rotary wing UAV according to claim 2, characterized in that: One end of the sliding rod (21) is fixedly connected to a pulling block (211), and the pulling block (211) is located outside the fixing frame (2).

4. The folding structure of the small rotary wing UAV according to claim 3 is characterized in that: The bottom of the pulling block (211) is fixedly connected to a connecting rod (212), and the bottom of the pulling block (211) is fixedly connected to a return spring (213).

5. The folding structure of the small rotary wing UAV according to claim 4, characterized in that: One end of the return spring (213) is fixedly connected to the interior of the fixing frame (2); a hook block (31) is fixedly connected to the top of the machine arm (3), and the hook block (31) is provided with an eccentric groove.

6. The folding structure of the small rotary wing UAV according to claim 5, characterized in that: Two groups of hook blocks (31) are provided, and the hook blocks (31) match the connecting rod (212). The top of the machine arm (3) is also fixedly connected with a boss (32), and the boss (32) matches the fixing frame (2). The top of the machine arm (3) is also fixedly connected with a connecting block (33), and the fixing frame (2) is rotatably connected to the machine arm (3) through the connecting block (33).

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