Locking anti-loosening structure for folding arm of unmanned aerial vehicle

Abstract

The invention relates to the field of unmanned aerial vehicles, and particularly discloses an unmanned aerial vehicle folding arm locking anti-loosening structure which comprises an unmanned aerial vehicle body, a connecting arm is arranged on the unmanned aerial vehicle body, a folding arm is hinged to the connecting arm, a propeller connected with a driving system is installed on the folding arm, a first butt joint box is arranged on the connecting arm, and a second butt joint box is arranged on the butt joint box. A second butt joint box matched with the first butt joint box is arranged on the folding machine arm. The multi-stage locking and anti-loosening effect is achieved through movement of the protection assembly, the reliability of the locking function and the flight stability are greatly improved, the abnormal flight phenomena such as out-of-control and aerial photography shaking are reduced, meanwhile, the connection arm and the folding machine arm are integrated through the protection assembly, and therefore the closed environment is formed, the locking structure is hidden inside, and the anti-loosening effect is achieved. Therefore, the flight resistance is reduced, the flight and cruising ability of the unmanned aerial vehicle is improved, the phenomenon that fatigue of the locking structure is aggravated due to wind resistance disturbance is reduced, the overall performance of the unmanned aerial vehicle is improved, and the service life of the unmanned aerial vehicle is prolonged.

Description

Technical Field

[0001] This invention relates to the field of drone technology, and in particular to a locking and anti-loosening structure for a drone folding arm. Background Technology

[0002] With the development of technology, drone technology has become increasingly mature. Among them, the folding arm of a drone is a key structural innovation in modern drone design. It is mainly used to improve portability, save storage and transportation space, and at the same time take into account the structural stability and aerodynamic performance during flight. The use of the folding arm function greatly improves the performance of the drone. The arm unfolds during flight to achieve flight, and the arm can be folded and retracted after landing to reduce the space occupied by the drone and facilitate the storage of the drone. Generally, folding arms are equipped with a locking structure.

[0003] Existing patent CN108382563A discloses a drone with a folding connecting arm. The structure includes an arm fixing device, which prevents the wings from automatically opening during transport, thus avoiding damage to the drone. Pressing the arm fixing button activates the motor in the device. A reduction gearbox slows the motor down, driving a first-stage helical gear to mesh with a second-stage helical gear. The second-stage helical gear then rotates a threaded rod, which meshes with a threaded sleeve. This causes the threaded sleeve to move a connecting rod downwards, allowing a fixing clip to enter the arm fixing groove and connect with it. This secures the arm in place, preventing the wings from automatically opening during transport and thus avoiding damage to the drone.

[0004] The above structure can achieve the folding effect of the drone's arms. However, the inventors found that the locking structure of the existing technology is simple, resulting in insufficient reliability of the locking function of the drone's folding arms. During flight, it is easy to loosen or shake, which not only destroys flight stability but may also cause abnormal situations such as attitude loss and aerial photography shake. In severe cases, it may cause the drone to crash and be damaged. In addition, for ease of operation, the locking structure is usually located on the outside of the folding arm, which not only increases flight drag and affects the drone's flight and endurance but may also exacerbate the fatigue of the locking structure due to wind resistance disturbances, greatly reducing the drone's performance and lifespan.

[0005] Therefore, how to provide a locking and anti-loosening structure for the folding arm of a drone is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] One objective of this invention is to provide a locking and anti-loosening structure for a drone folding arm. This structure includes a drone body, a connecting arm mounted on the drone body, a folding arm hinged to the connecting arm, a propeller connected to a drive system mounted on the folding arm, a first docking box on the connecting arm, a second docking box adapted to the first docking box on the folding arm, a protective component between the connecting arm and the folding arm, a pushing component adapted to the protective component on the first docking box, and a rotating component inside the first docking box. The pushing component is provided with a biting component connected to the rotating component. The docking box two is provided with a bearing component adapted to the biting component. A transmission component is provided between the bearing component and the pushing component. The pushing component is provided with a snap-fit ​​component for snapping into the docking box two. The folding arm is provided with a pressing component. The docking box two is provided with an unlocking component communicating with the pressing component. The unlocking component is used to unlock the snap-fit ​​component. The forward movement of the protective component drives the pushing component to move, forming a multi-level anti-loosening effect during the connection between the protective component and the folding arm.

[0007] Preferably, the protective component includes a sliding sleeve fitted around the outer ring of the connecting arm, a locking rod extending through the connecting arm on the sliding sleeve, a protective sleeve bearing connected to the sliding sleeve, and an end of the protective sleeve threadedly connected to the end of the folding arm.

[0008] Preferably, the pushing assembly includes a pushing plate disposed within the docking box, a pushing rod passing through the docking box on the pushing plate, and a pushing spring sleeved on the outer ring of the pushing rod between the pushing plate and the docking box.

[0009] Preferably, the rotating assembly includes a sliding block slidably disposed within the first docking box, a rotating block being connected to the sliding block by a bearing, an abutment block being disposed on the rotating block that contacts the sliding block, a locking block 1 penetrating the first docking box and the second docking box being disposed on the sliding block, and a locking block 2 penetrating the first docking box and the second docking box being disposed on the rotating block, wherein the second docking box has an open space for the second locking block to rotate.

[0010] Preferably, the engagement assembly includes a push block disposed on the push rod, a pull rod disposed on the push block, a toggle rod bearingly connected to the pull rod, a toggle block disposed on the rotating block, a groove adapted to the toggle rod being formed on the toggle block, and an engagement pin disposed on the toggle block.

[0011] Preferably, the bearing component includes a support frame disposed on the second docking box, a threaded rod is connected to the support frame by a bearing, a movable plate is slidably disposed on the support frame, the threaded rod is threaded through the movable plate, a sliding rod is disposed on the movable plate that passes through the second docking box, a mounting plate is disposed on the sliding rod, and an anti-loosening bearing ring adapted to the engagement pin is disposed on the mounting plate.

[0012] Preferably, the transmission assembly includes a connecting frame disposed on the push plate, the connecting frame passing through the docking box, a transmission rack disposed on the connecting frame, and a transmission gear meshing with the transmission rack fixedly sleeved on the threaded rod.

[0013] Preferably, the snap-fit ​​assembly includes a mounting block disposed at the end of the push rod, a baffle disposed inside the mounting block, a snap-fit ​​rod disposed on the baffle that penetrates the mounting block, a snap-fit ​​block disposed at the end of the snap-fit ​​rod, and a snap-fit ​​spring sleeved on the outer ring of the snap-fit ​​rod disposed between the baffle and the mounting block.

[0014] Preferably, the pressing assembly includes a pressing cylinder disposed on the folding arm, a pressing piston disposed inside the pressing cylinder, a pressing rod disposed on the pressing piston that passes through the pressing cylinder, a pressing plate disposed on the pressing rod, and a pressing spring sleeved on the outer ring of the pressing rod disposed between the pressing plate and the pressing cylinder.

[0015] Preferably, the unlocking component includes an unlocking cylinder disposed within the docking box two, a connecting pipe connected to the pressing cylinder on the unlocking cylinder, an unlocking piston disposed within the unlocking cylinder, an unlocking rod disposed on the unlocking piston penetrating the unlocking cylinder, an unlocking block disposed on the unlocking rod adapted to the locking block, and an unlocking spring sleeved on the outer ring of the unlocking rod between the unlocking block and the unlocking cylinder.

[0016] The beneficial effects of this invention are as follows: In this invention, when the folding arm unfolds, it is rotated around the hinge point until the connecting arm and the folding arm are in a straight line. At this point, docking boxes one and two are properly engaged, completing the unfolding action. The folding arm then needs to be locked by pulling the protective component. When the protective component moves to a certain position, it drives the pushing component, which in turn drives the locking component, transmission component, rotating component, and engagement component to move synchronously. The locking component, rotating component, and engagement component enter docking box two. When the rotating component reaches its limit position, it becomes rotatable without displacement. At this point, the engagement component corresponds to the bearing component, and simultaneously, the transmission components mesh with each other. When the connecting and pushing components continue to move forward, they drive the transmission components, causing the bearing component to approach the engaging component. Simultaneously, under the action of the rotating component, the engaging component rotates, gradually locking the engaging component and the bearing component together. At this point, the protective component contacts the folding arm. Rotating the protective component forces it forward, making it an integral part of the folding arm, thus achieving a primary anti-loosening effect. At this stage, the protective component, connecting arm, and folding arm form a closed environment, concealing the device and preventing exposure, significantly reducing resistance. During the primary locking process of the protective component, its forward movement drives the pushing component forward, and the engaging component and bearing component become tightly interlocked. The tight connection creates a secondary anti-loosening effect. Simultaneously, the pushing component drives the locking component forward, causing it to engage with the second docking box, creating a tertiary anti-loosening effect. When the locking sound is heard, the rotation of the protective component stops, completing the multi-stage locking and anti-loosening operation. During unlocking, the pressing component drives the unlocking component, causing it to press against the locking component, resulting in its retraction. The protective component rotates in the opposite direction, separating it from the folding arm and returning it to its original position. The pulling component then drives the locking component back smoothly, while the transmission component rotates, moving the bearing component away from the engaging component until the bearing component separates from the engaging component, completing the three-stage locking and anti-loosening operation. The multi-stage unlocking mechanism, driven by the action of the pushing components, restores the locking, transmission, rotation, and engagement components to their original positions. In summary, this application's UAV folding arm locking and anti-loosening structure utilizes the movement of the protective components to achieve a multi-stage locking and anti-loosening effect, significantly improving the reliability of the locking function and flight stability, reducing abnormal flight phenomena such as loss of control and aerial photography shake. Simultaneously, the protective components integrate the connecting arm and the folding arm, creating a closed environment where the locking structure is hidden internally, thereby reducing flight drag, improving the UAV's flight and endurance capabilities, reducing fatigue of the locking structure caused by wind resistance disturbances, improving the overall performance of the UAV, and extending its service life. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the UAV of the present invention; Figure 2 This is a diagram showing the connection relationship between the connecting arm and the folding arm of the present invention; Figure 3 For the present invention Figure 2 Exploded view; Figure 4 For the present invention Figure 3 Structural solid diagrams of docking box one and docking box two; Figure 5 For the present invention Figure 4 Internal structural entity diagram; Figure 6 For the present invention Figure 5 Structural solid diagrams of the pushing component, the engaging component, and the transmission component; Figure 7 This is a structural entity diagram of the rotating assembly of the present invention; Figure 8 This is a structural entity diagram of the bearing component of the present invention; Figure 9 This is a structural schematic diagram of the snap-fit ​​assembly of the present invention; Figure 10 This is a structural entity diagram of the pressing component of the present invention; Figure 11 This is a structural entity diagram of the unlocking component of the present invention.

[0018] In the diagram: 1. UAV body; 2. Connecting arm; 3. Folding arm; 4. Propeller; 5. Docking box one; 6. Docking box two; 7. Protective assembly; 701. Sliding sleeve; 702. Clamping rod; 703. Protective sleeve; 8. Pushing assembly; 801. Pushing plate; 802. Pushing rod; 803. Pushing spring; 9. Rotating assembly; 901. Sliding block; 902. Rotating block; 903. Abutting block; 904. Clamping block one; 905. Clamping block two; 10. Engaging assembly; 1001. Pushing block; 1002. Pulling rod; 1003. Actuating rod; 1004. Actuating block; 1005. Engaging pin; 11. Bearing assembly; 1101. Support frame; 1102. Threaded rod; 1103. Movable plate 1104. Sliding rod; 1105. Mounting plate; 1106. Anti-loosening bearing ring; 12. Transmission assembly; 1201. Connecting frame; 1202. Transmission spur rack; 1203. Transmission gear; 13. Snap-fit ​​assembly; 1301. Mounting block; 1302. Baffle; 1303. Snap-fit ​​rod; 1304. Snap-fit ​​block; 1305. Snap-fit ​​spring; 14. Pressing assembly; 1401. Pressing cylinder; 1402. Pressing piston; 1403. Pressing rod; 1404. Pressing plate; 1405. Pressing spring; 15. Unlocking assembly; 1501. Unlocking cylinder; 1502. Connecting pipe; 1503. Unlocking piston; 1504. Unlocking rod; 1505. Unlocking block; 1506. Unlocking spring. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0020] Example 1: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the present invention discloses a locking and anti-loosening structure for a drone folding arm, comprising a drone body 1, a connecting arm 2 mounted on the drone body 1, a folding arm 3 hinged to the connecting arm 2, a propeller 4 connected to a drive system mounted on the folding arm 3, a docking box 1 5 mounted on the connecting arm 2, a docking box 2 6 adapted to docking box 1 5 mounted on the folding arm 3, a protective component 7 disposed between the connecting arm 2 and the folding arm 3, a pushing component 8 adapted to the protective component 7 mounted on docking box 1 5, a rotating component 9 disposed inside docking box 1 5, and a component 9 mounted on the pushing component 8 that is compatible with the rotating component. The biting component 10 is connected to the docking box 2 6, and a bearing component 11 adapted to the biting component 10 is provided on the docking box 2 6. A transmission component 12 is provided between the bearing component 11 and the pushing component 8. A locking component 13 for locking onto the docking box 2 6 is provided on the pushing component 8. A pressing component 14 is provided on the folding arm 3. An unlocking component 15 communicating with the pressing component 14 is provided inside the docking box 2 6. The unlocking component 15 is used to unlock the locking component 13. Among them, the forward movement of the protection component 7 drives the pushing component 8 to move, forming a multi-level anti-loosening effect during the connection between the protection component 7 and the folding arm 3.

[0021] Working principle: When the folding arm 3 unfolds, rotate the folding arm 3 so that it rotates around the hinge point until the connecting arm 2 and the folding arm 3 are in a straight line. At this time, the docking box 1 5 and the docking box 2 6 are just docked, completing the unfolding action. The folding arm 3 needs to be locked. Pull the protective component 7. When the protective component 7 moves to a certain position, the protective component 7 drives the pushing component 8 to move. The pushing component 8 drives the locking component 13, the transmission component 12, the rotating component 9 and the engagement component 10 to move synchronously. The locking component 13, the rotating component 9 and the engagement component 10 will enter the docking box 2 6. When the rotating component 9 moves to the limit position... Subsequently, the rotating component 9 becomes rotatable without displacement. At this time, the engaging component 10 corresponds to the bearing component 11, and the transmission component 12 is engaged with each other. When the pushing component 8 continues to move forward, it drives the transmission component 12 to move, causing the bearing component 11 to approach the engaging component 10. Simultaneously, under the action of the rotating component 9, the engaging component 10 rotates, causing it to gradually engage with the bearing component 11. At this time, the protective component 7 contacts the folding arm 3. Rotating the protective component 7 forces it to move forward, making it an integral part of the protective component 7 and the folding arm 3, thereby achieving a first-level anti-loosening effect. The protective component 7, connecting arm 2, and folding arm 3 form a closed environment, concealing the device and preventing exposure, thus greatly reducing resistance. During the first-level locking process of the protective component 7, its forward movement drives the pushing component 8 forward, causing the engaging component 10 and the bearing component 11 to connect tightly, creating a second-level anti-loosening effect. Simultaneously, the pushing component 8 drives the locking component 13 forward, causing it to engage with the docking box 6. At this point, the locking component 13 creates a third-level anti-loosening effect. When the locking sound of the locking component 13 is heard, the rotation of the protective component 7 stops, completing the multi-level locking and anti-loosening operation. When locking, the pressing component 14 drives the unlocking component 15 to move, causing the unlocking component 15 to press the locking component 13, causing the locking component 13 to retract, and the protective component 7 to rotate in the opposite direction, causing the protective component 7 to separate from the folding arm 3, so that the protective component 7 returns to its position, and the pushing component 8 is pulled back, which drives the locking component 13 to retract smoothly. At the same time, the transmission component 12 rotates, causing the bearing component 11 to move away from the biting component 10, until the bearing component 11 separates from the biting component 10, completing the three-level unlocking. Under the action of the pushing component 8 itself, the locking component 13, the transmission component 12, the rotating component 9 and the biting component 10 return to their original positions.In summary, the anti-loosening locking structure for a folding arm of a drone disclosed in this application utilizes the movement of the protective component 7 to achieve a multi-level locking effect, significantly improving the reliability of the locking function and flight stability, reducing abnormal flight phenomena such as loss of control and aerial photography shake. Simultaneously, the protective component 7 integrates the connecting arm 2 and the folding arm 3, creating a closed environment that conceals the locking structure internally. This reduces flight drag, improves the drone's flight and endurance capabilities, minimizes fatigue of the locking structure caused by wind resistance disturbances, enhances the overall performance of the drone, and extends its service life.

[0022] Example 2: like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a locking and anti-loosening structure for a folding arm of a drone. The protective component 7 includes a sliding sleeve 701 sleeved on the outer ring of the connecting arm 2. A locking rod 702 penetrating the connecting arm 2 is provided on the sliding sleeve 701. A protective sleeve 703 is connected to the sliding sleeve 701 by a bearing. The end of the protective sleeve 703 is threadedly connected to the end of the folding arm 3.

[0023] like Figure 4 , Figure 5 and Figure 6 As shown, the present invention provides a locking and anti-loosening structure for a folding arm of a drone. The pushing component 8 includes a pushing plate 801 disposed in a docking box 5. A pushing rod 802 is disposed on the pushing plate 801 and passes through the docking box 5. A pushing spring 803 is disposed between the pushing plate 801 and the docking box 5 and is sleeved on the outer ring of the pushing rod 802.

[0024] like Figure 6 and Figure 7 As shown, the present invention discloses a locking and anti-loosening structure for a folding arm of a drone. The rotating component 9 includes a sliding block 901 slidably disposed in a docking box 5. A rotating block 902 is connected to the sliding block 901 by a bearing. An abutment block 903 is disposed on the rotating block 902 that contacts the sliding block 901. A locking block 904 is disposed on the sliding block 901 that penetrates the docking box 5 and the docking box 6. A locking block 905 is disposed on the rotating block 902 that penetrates the docking box 5 and the docking box 6. The docking box 6 has an open space for the rotation of the locking block 905.

[0025] like Figure 5 , Figure 6 and Figure 7As shown, the present invention discloses a locking and anti-loosening structure for a folding arm of a drone. The engaging assembly 10 includes a pushing block 1001 disposed on a pushing rod 802, a pulling bent rod 1002 disposed on the pushing block 1001, a toggle rod 1003 connected to the pulling bent rod 1002 by a bearing, a toggle block 1004 disposed on a rotating block 902, a groove adapted to the toggle rod 1003 being formed on the toggle block 1004, and an engaging pin 1005 disposed on the toggle block 1004.

[0026] like Figure 5 and Figure 8 As shown, the present invention discloses a locking anti-loosening structure for a folding arm of a drone. The bearing component 11 includes a support frame 1101 disposed on a docking box 2 6. A threaded rod 1102 is connected to the support frame 1101 by a bearing. A movable plate 1103 is slidably disposed on the support frame 1101. The threaded rod 1102 is threaded through the movable plate 1103. A sliding rod 1104 is disposed on the movable plate 1103 and passes through the docking box 2 6. A mounting plate 1105 is disposed on the sliding rod 1104. An anti-loosening bearing ring 1106 adapted to the engagement pin 1005 is disposed on the mounting plate 1105.

[0027] like Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the present invention provides a locking and anti-loosening structure for a folding arm of a drone. The transmission component 12 includes a connecting frame 1201 disposed on a push plate 801. The connecting frame 1201 passes through a docking box 5. A transmission rack 1202 is disposed on the connecting frame 1201. A transmission gear 1203 that meshes with the transmission rack 1202 is fixedly sleeved on the threaded rod 1102.

[0028] like Figure 6 and Figure 9 As shown, the present invention discloses a locking and anti-loosening structure for a folding arm of a drone. The locking assembly 13 includes a mounting block 1301 disposed at the end of a push rod 802. A baffle 1302 is disposed inside the mounting block 1301. A locking rod 1303 is disposed on the baffle 1302 and passes through the mounting block 1301. A locking block 1304 is disposed at the end of the locking rod 1303. A locking spring 1305 is disposed between the baffle 1302 and the mounting block 1301 and is sleeved on the outer ring of the locking rod 1303.

[0029] like Figure 4 , Figure 5 and Figure 10As shown, the present invention discloses a locking and anti-loosening structure for a folding arm of a drone. The pressing assembly 14 includes a pressing cylinder 1401 disposed on the folding arm 3. A pressing piston 1402 is disposed inside the pressing cylinder 1401. A pressing rod 1403 is disposed on the pressing piston 1402 and passes through the pressing cylinder 1401. A pressing plate 1404 is disposed on the pressing rod 1403. A pressing spring 1405 is disposed between the pressing plate 1404 and the pressing cylinder 1401 and sleeved on the outer ring of the pressing rod 1403.

[0030] like Figure 5 and Figure 11 As shown, the present invention discloses a locking and anti-loosening structure for a folding arm of a drone. The unlocking component 15 includes an unlocking cylinder 1501 disposed in the docking box 2 6. The unlocking cylinder 1501 is provided with a connecting pipe 1502 that communicates with the pressing cylinder 1401. The unlocking cylinder 1501 is provided with an unlocking piston 1503. The unlocking piston 1503 is provided with an unlocking rod 1504 that passes through the unlocking cylinder 1501. The unlocking rod 1504 is provided with an unlocking block 1505 that is adapted to the locking block 1304. An unlocking spring 1506 is provided between the unlocking block 1505 and the unlocking cylinder 1501 and is sleeved on the outer ring of the unlocking rod 1504.

[0031] Working principle: When the folding arm 3 unfolds, rotate the folding arm 3 around the hinge point until the connecting arm 2 and the folding arm 3 are in a straight line. At this time, the docking box 1 5 and the docking box 2 6 are just docked, completing the unfolding action. The folding arm 3 needs to be locked. Pull the protective sleeve 703, which causes the protective sleeve 703 to drive the locking rod 702 and the sliding sleeve 701 to move. When the locking rod 702 moves to a certain position, the locking rod 702 contacts the push plate 801, causing the locking rod 702 to drive the push plate 801 to move forward. The movement of the push plate 801 drives the push rod 802 to move, and the push rod 802 drives the push block 10. 01 and connecting frame 1201 move, connecting frame 1201 drives transmission rack 1202 to move forward, at the same time push block 1001 drives pull rod 1002 to move, pull rod 1002 drives toggle rod 1003 to move, toggle rod 1003 drives toggle block 1004 and engagement pin 1005 to move. Since locking block 1 904 and locking block 2 905 are both slidably locked, sliding block 901 drives rotating block 902 and abutting block 903 to move forward in a straight line, and push rod 802 drives mounting block 1301 to move, forcing locking assembly 13, transmission assembly 12, rotating assembly 9 and engagement assembly 10 to move synchronously; As the protective sleeve 703 continues to move, the snap-fit ​​component 13, the rotating component 9, and the engagement component 10 pass through the docking box 1 5 and enter the docking box 2 6. Similarly, due to the sliding snap-fit ​​effect of the snap-fit ​​block 1 904 and the snap-fit ​​block 2 905, the rotating block 902 cannot rotate. The sliding block 901 first moves in a straight line in the docking box 2 6. When the inner wall of the docking box 2 6 abuts against the snap-fit ​​block 1304, the snap-fit ​​block 1304 moves into the movable space and is not snapped by the docking box 2 6. That is, the snap-fit ​​block 1304 and the rotating block 902 are in a rotatable state and do not undergo displacement. At this time, the engagement pin 1005 corresponds to the anti-loosening bearing ring 1106, and the transmission rack 1202 meshes with the transmission gear 1203. As the protective sleeve 703 continues to move forward, the connecting frame 1201 drives the transmission rack 1202 to move, which in turn drives the transmission gear 1203 to rotate. The rotation of the transmission gear 1203 drives the threaded rod 1102 to rotate. Under the guidance of the support frame 1101, the threaded rod 1102 drives the movable plate 1103 to move, which in turn drives the sliding rod 1104 to move. The sliding rod 1104 drives the mounting plate 1105 and the anti-loosening bearing ring 1106 to move forward, bringing the anti-loosening bearing ring 1106 closer to the engagement pin 1005. Simultaneously, it pushes the block 1001 forward, forcing the pulling rod 1002 to drive the actuating rod 1003 to move within the groove of the actuating block 1004, causing the actuating block 1004 to rotate. The actuating block 1004 then drives the rotating block 902 and the locking block 905 to rotate. Rotating block 902 drives abutting block 903 to rotate away from sliding block 901, while actuating block 1004 drives biting pin 1005 to slowly press anti-loosening bearing ring 1106. At this time, it should be noted that biting pin 1005 and anti-loosening bearing ring 1106 are in a slight engagement state, that is, anti-loosening bearing ring 1106 is dented. At this time, protective sleeve 703 contacts folding arm 3. Rotating protective sleeve 703, since the end of protective sleeve 703 is threadedly connected to the end of folding arm 3, protective sleeve 703 will continue to move forward during the connection with folding arm 3, so that protective sleeve 703 and folding arm 3 are connected as one, thereby achieving first-level anti-loosening effect. At this time, protective sleeve 703, connecting arm 2 and folding arm 3 form a closed environment, realizing the hiding function of locking structure, avoiding exposure, and greatly reducing flight drag. During the initial engagement of the protective sleeve 703, as the protective sleeve 703 continues to move forward, it drives the push plate 801 to continue moving forward, forcing the engagement pin 1005 and the anti-loosening bearing ring 1106 to gradually and tightly engage. The deeper the indentation of the anti-loosening bearing ring 1106, the more effective the secondary anti-loosening effect. Simultaneously, the push rod 802 drives the mounting block 1301, baffle 1302, engagement rod 1303, engagement block 1304, and engagement spring 1305 to move forward. Due to the inner walls of docking boxes 1-5 and 2-6 restricting the release of the engagement block 1304... When the locking block 1304 is in a retracted state, that is, the locking spring 1305 is in a compressed state, when the inner wall space of the docking box 2 6 expands, the locking block 1304 is no longer restricted. At this time, the locking spring 1305 is stretched, and the locking rod 1303 drives the locking block 1304 to extend, realizing the locking effect between the locking block 1304 and the docking box 2 6, so that the locking block 1304 forms a three-level anti-loosening effect. Due to the sudden release of the locking block 1304, a sound of the locking block 1304 being released will be heard. At this time, stop rotating the protective sleeve 703 to complete the multi-level locking and anti-loosening operation. When unlocking, pressing down the pressing lever 1403 causes the pressing plate 1404 to press down, which in turn compresses the pressing spring 1405. Simultaneously, the pressing lever 1403 moves the pressing piston 1402, causing the hydraulic oil in the pressing cylinder 1401 to enter the unlocking cylinder 1501 through the connecting pipe 1502. This causes the unlocking piston 1503 to move forward, which in turn moves the unlocking lever 1504 forward. When the unlocking lever 1504 moves forward, it drives the unlocking block 1505 forward, compressing the unlocking spring 1506. This forces the unlocking block 1505 to press against the locking block 1304, causing the locking block 1304 to retract under force. This compresses the locking spring 1305, causing the protective sleeve 703 to rotate in the opposite direction, separating it from the folding arm 3 and returning it to its original position. At this point, the docking box 2 6 again restricts the release of the locking block 1304. The locking block 1304 moves along the inside of the docking box 2 6. As the inner wall slides back, the engagement pin 1005 and the anti-loosening ring still slightly engage during this process, maintaining a locking effect. The push plate 801 needs to be pulled back, causing the push rod 802 to retract. The push rod 802 then smoothly retracts the locking assembly 13. Meanwhile, the actuating rod 1003 causes the actuating block 1004 to rotate in the opposite direction until the contact block 903 contacts the sliding block 901, causing the rotating block 902 to stop rotating, and the locking blocks 1 and 2 slidingly engage. The device is connected to the second docking box 6, and the transmission rack 1202 retracts, causing the transmission gear 1203 to rotate in the opposite direction, forcing the anti-loosening ring away from the engagement pin 1005. At this time, the engagement pin 1005 is forced to separate from the anti-loosening ring, completing the three-stage unlocking. Under the rebound action of the push spring 803, the locking component 13, transmission component 12, rotation component 9 and engagement component 10 return to their original positions, that is, they enter the first docking box 5, and the first docking box 5 and the second docking box 6 are in a separated state.

[0032] This solution utilizes the movement of the protective component 7 to achieve a multi-level locking and anti-loosening effect, greatly improving the reliability of the locking function and flight stability, and reducing abnormal flight phenomena such as loss of control and aerial photography shake. On the other hand, the protective component 7 integrates the connecting arm 2 and the folding arm 3, thereby creating a closed environment and hiding the locking structure inside. This reduces flight drag, improves the flight and endurance of the UAV, reduces the phenomenon of fatigue of the locking structure caused by wind resistance disturbance, improves the overall performance of the UAV, and extends the service life of the UAV.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A folding arm locking structure for unmanned aerial vehicle, comprising an unmanned aerial vehicle body (1), a connecting arm (2) is arranged on the unmanned aerial vehicle body (1), a folding machine arm (3) is hinged on the connecting arm (2), a propeller (4) connected with a driving system is installed on the folding machine arm (3), characterized in that, The connecting arm (2) is provided with a docking box I (5), the folding machine arm (3) is provided with a docking box II (6) matched with the docking box I (5), the connecting arm (2) and the folding machine arm (3) are provided with a protection assembly (7), the docking box I (5) is provided with a pushing assembly (8) matched with the protection assembly (7), the docking box I (5) is provided with a rotating assembly (9), the pushing assembly (8) is provided with a bite assembly (10) connected with the rotating assembly (9), the docking box II (6) is provided with a bearing assembly (11) matched with the bite assembly (10), the bearing assembly (11) and the pushing assembly (8) are provided with a transmission assembly (12), the pushing assembly (8) is provided with a clamping assembly (13) used for clamping the docking box II (6), the folding machine arm (3) is provided with a pressing assembly (14), the docking box II (6) is provided with an unlocking assembly (15) communicated with the pressing assembly (14), and the unlocking assembly (15) is used for unlocking the clamping assembly (13); wherein the protection assembly (7) drives the pushing assembly (8) to move, and a multi-stage anti-loosening effect is formed during the connection of the protection assembly (7) and the folding machine arm (3).

2. The folding arm locking structure of claim 1, wherein, The protection assembly (7) comprises a sliding sleeve (701) sleeved on the outer circle of the connecting arm (2), the sliding sleeve (701) is provided with a clamping rod (702) penetrating through the connecting arm (2), and the sliding sleeve (701) is connected with a protection sleeve (703) in a bearing mode; and the end of the protection sleeve (703) is threadedly connected with the end of the folding machine arm (3).

3. The folding arm locking structure of claim 1, wherein, The pushing assembly (8) comprises a pushing plate (801) arranged in the docking box I (5), the pushing plate (801) is provided with a pushing rod (802) penetrating through the docking box I (5), and the pushing plate (801) and the docking box I (5) are provided with a pushing spring (803) sleeved on the outer circle of the pushing rod (802).

4. The folding arm locking structure of claim 3, wherein, The rotating assembly (9) comprises a sliding block (901) slidingly arranged in the docking box I (5), the sliding block (901) is connected with a rotating block (902) in a bearing mode, the rotating block (902) is provided with a contact block (903) in contact with the sliding block (901), the sliding block (901) is provided with a clamping block I (904) penetrating through the docking box I (5) and the docking box II (6), and the rotating block (902) is provided with a clamping block II (905) penetrating through the docking box I (5) and the docking box II (6); wherein the docking box II (6) is provided with a moving space for the rotation of the clamping block II (905).

5. The folding arm locking structure of claim 4, wherein, The occlusion assembly (10) comprises a pushing block (1001) arranged on the pushing rod (802), a pulling bent rod (1002) is arranged on the pushing block (1001), a pulling rod (1003) is connected to the pulling bent rod (1002) through a bearing, a pulling block (1004) is arranged on the rotating block (902), a groove body matched with the pulling rod (1003) is arranged on the pulling block (1004), and an occlusion nail (1005) is arranged on the pulling block (1004).

6. The folding arm locking structure of claim 5, wherein, The bearing assembly (11) comprises a supporting frame (1101) arranged on the second docking box (6), a threaded rod (1102) is connected to the supporting frame (1101) through a bearing, a movable plate (1103) is arranged on the supporting frame (1101) in a sliding mode, the threaded rod (1102) is screwed through the movable plate (1103), a sliding rod (1104) penetrating through the second docking box (6) is arranged on the movable plate (1103), an installation plate (1105) is arranged on the sliding rod (1104), and an anti-loose bearing ring (1106) matched with the occlusion nail (1005) is arranged on the installation plate (1105).

7. The folding arm locking structure of claim 6, wherein, The transmission assembly (12) comprises a connecting frame (1201) arranged on the pushing plate (801), the connecting frame (1201) penetrates through the first docking box (5), a transmission straight rack (1202) is arranged on the connecting frame (1201), and a transmission gear (1203) engaged with the transmission straight rack (1202) is fixedly arranged on the threaded rod (1102).

8. The folding arm locking structure of claim 3, wherein, The clamping assembly (13) comprises an installation block (1301) arranged at the end of the pushing rod (802), a baffle (1302) is arranged in the installation block (1301), a clamping rod (1303) penetrating through the installation block (1301) is arranged on the baffle (1302), a clamping block (1304) is arranged at the end of the clamping rod (1303), and a clamping spring (1305) is arranged on the outer circle of the clamping rod (1303) between the baffle (1302) and the installation block (1301).

9. The folding arm locking structure of claim 8, wherein, The pressing assembly (14) comprises a pressing oil cylinder (1401) arranged on the folding machine arm (3), a pressing piston (1402) is arranged in the pressing oil cylinder (1401), a pressing rod (1403) penetrating through the pressing oil cylinder (1401) is arranged on the pressing piston (1402), a pressing plate (1404) is arranged on the pressing rod (1403), and a pressing spring (1405) is arranged on the outer circle of the pressing rod (1403) between the pressing plate (1404) and the pressing oil cylinder (1401).

10. The folding arm locking structure of claim 9, wherein, The unlocking assembly (15) comprises an unlocking oil cylinder (1501) arranged in the docking box two (6), a communication pipe (1502) is arranged on the unlocking oil cylinder (1501) and communicates with the pressing oil cylinder (1401), an unlocking piston (1503) is arranged in the unlocking oil cylinder (1501), an unlocking rod (1504) is arranged on the unlocking piston (1503) and penetrates the unlocking oil cylinder (1501), an unlocking block (1505) is arranged on the unlocking rod (1504) and is matched with the clamping block (1304), and an unlocking spring (1506) is arranged between the unlocking block (1505) and the unlocking oil cylinder (1501) and is sleeved on the outer circle of the unlocking rod (1504).

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