Unmanned aerial vehicle folding wing unfolding and locking mechanism

Abstract

The invention relates to an unmanned aerial vehicle folding wing unfolding and locking mechanism which comprises a fixed wing and a folding wing, a first rotating shaft plate and a second rotating shaft plate are installed at the movable connecting ends of the fixed wing and the folding wing respectively, and the first rotating shaft plate and the second rotating shaft plate of an upper wing face and a lower wing face are provided with a locking mechanism. The wing pressing device is used for providing unfolding power for the folding wings, and the locking mechanism is used for unfolding the folding wings. By adopting the design of the folding wing unfolding locking mechanism comprising the torsional spring, the bolt, the spring, the collision block and the guide groove, the folding wing unfolding locking mechanism has the advantages of small occupied space, reliable action, simple structure, small folding wing unfolding resistance, mature manufacturing process, low processing cost and convenience in installation and maintenance; the device is suitable for various folding unmanned aerial vehicles.

Description

Technical Field

[0001] The present invention relates to the field of unmanned aerial vehicle wing design. Background Art

[0002] Folding unmanned aerial vehicles can be folded into a small size after folding and can be launched by different carriers in a launch tube. After launch, the folding unmanned aerial vehicle automatically unfolds and locks its wings.

[0003] In order to accurately and reliably unfold and lock the folding wings of the unmanned aerial vehicle. At present, the unfolding and locking mechanisms of the folding wings of unmanned aerial vehicles mostly adopt structures such as pins and leaf springs. The traditional pin locking mechanism can only lock the reserved holes of the rotating shaft of the folding wing through pins. The insertion depth of the pins is relatively shallow, the layout of the pins is restricted greatly, and the shear resistance performance requirements of the pins are relatively high; the traditional leaf spring locking mechanism can only lock the reserved card slots of the rotating shaft through the deformation of the leaf spring itself. The leaf spring locking mechanism has a large volume, there are gaps at the locking positions, and the leaf spring must be arranged in the radial direction of the rotating shaft of the folding wing, and the arrangement position is relatively single. In actual design, when the unfolding direction of the folding wing of the unmanned aerial vehicle is along the chord length direction, the traditional pins and leaf springs cannot be effectively locked, resulting in the inability to effectively transmit the aerodynamic force along the span direction. Summary of the Invention

[0004] The purpose of the present invention is to avoid the deficiencies of the prior art and provide an unfolding and locking mechanism for the folding wings of an unmanned aerial vehicle that relies on the impact of the joint surface between the inner and outer sections of the folding wing after folding to release the pin and lock the wing to the unfolded state, and can effectively transmit the aerodynamic force along the span direction.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: an unfolding and locking mechanism for the folding wings of an unmanned aerial vehicle, including a fixed wing and a folding wing that is foldably connected to the fixed wing in the span direction of the fixed wing. When unfolded, the folding wing and the fixed wing are combined to form a wing; A first rotating shaft plate and a second rotating shaft plate are respectively installed on the movable connection ends of the fixed wing and the folding wing, and are hinged on a rotating shaft through a pair of connection holes. The rotating shaft is arranged on the upper wing surface of the wing, and a wing pressing device for providing unfolding power for the folding wing is arranged on the rotating shaft; On the lower wing surface of the wing, there is a pin cabin installed on the second rotating shaft plate. A pair of pins and a spring are installed in the pin guiding cavity of the pin cabin; the spring is arranged between the pair of pins; Axially on the pin cabin, there are a first card slot and a second card slot arranged in parallel and communicated. The first card slot is arranged near the fixed wing end, and the length of the first card slot is greater than that of the second card slot; A pair of machine screw is fixedly connected to a pair of pins. When the pair of machine screws drive the pair of pins to squeeze the spring, they can be clamped in the second card slot. When the pair of machine screws drive the pair of pins to transfer from the first card slot to the second card slot, and the spring pushes the pair of pins out from the openings at both ends of the pin cabin, the pair of machine screws can be clamped in the first card slot. Meanwhile, on the first rotating shaft plate, there is a pair of jacks corresponding to the openings at both ends of the pin cabin respectively. Between the pair of jacks, there is a striker. The striker is used to push the machine screw in the second card slot into the first card slot when the folding wing is fully deployed. At this time, after the spring pushes the pair of pins out to the jacks, the deployment and locking of the folding wing are completed.

[0006] Furthermore, the wing pressing device includes: On the rotating shaft between the pair of connection holes, there is a torsion spring. The two ends of the torsion spring are respectively fixed on the folding wing and the fixed wing, providing the deployment power for the folding wing.

[0007] Furthermore, the two ends of the torsion spring are respectively fixed in the second fixed slot and the first fixed slot provided on the folding wing and the fixed wing.

[0008] Furthermore, the first rotating shaft plate and the second rotating shaft plate are respectively arranged to match the shapes of the end parts of the folding wing and the fixed wing in an active connection.

[0009] Furthermore, the first rotating shaft plate and the folding wing, and the second rotating shaft plate and the fixed wing are fixedly connected by gluing.

[0010] The beneficial effects of the present invention are as follows: The present invention designs a plug-in type unfolding and locking mechanism for the folding wing of an unmanned aerial vehicle along the chord length direction of the wing, and relies on the impact of the joint surface of the inner and outer sections of the folding wing after folding to release the plug and lock the unfolded state of the wing. During the unfolding process of the folding wing, the plug does not contact the rotating device, with small resistance, and the locking position of the plug is relatively far from the folding and rotating shaft of the wing, requiring low shear resistance for the plug, effectively transmitting the aerodynamic force along the span direction. Specifically, it also includes: 1. The torsion spring drive occupies a small space and has reliable operation; 2. The plug has a large locking depth and reliable locking; 3. During the unfolding process of the wing, the plug does not contact the rotating device, with small resistance; 4. The locking device can be manually reset without disassembly and assembly, facilitating reinstallation; 5. The folding mechanism can be disassembled and assembled as a whole, facilitating installation and maintenance. Description of the Drawings Figure 1 It is a schematic structural diagram of the upper wing mechanism of the present invention; Figure 2 It is a schematic side view structure diagram of the present invention; Figure 3 Schematic structural diagram of the folding state of the present invention; Figure 4 Schematic structural diagram during the unfolding process of the present invention; Figure 5 Schematic structural diagram when the present invention is fully unfolded.

[0011] In the figure: 1 - torsion spring; 2 - rotating shaft; 4 - folding wing; 5 - fixed wing; 51 - first fixing groove; 52 - first clamping groove; 53 - second clamping groove; 41 - second fixing groove; 6 - first rotating shaft plate; 7 - second rotating shaft plate; 71 - pin cabin; 8 - spring; 9 - pair of machine screw; 10 - pair of pins; 11 - striker; 12 - pair of jacks. Specific embodiments

[0012] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0013] To achieve the above object, the present invention provides the following specific embodiments: Embodiment 1: As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , a folding wing unfolding and locking mechanism for an unmanned aerial vehicle, as shown in Figure 2 , includes a fixed wing 5 and a folding wing 4 that is foldably connected to the fixed wing 5 in the extending direction of the fixed wing 5. When unfolded, the folding wing 4 and the fixed wing 5 are combined to form a wing; As shown in Figure 1 , the first rotating shaft plate 6 and the second rotating shaft plate 7 are respectively installed on the movable connection ends of the fixed wing 5 and the folding wing 4, and are hinged on the rotating shaft 2 through a pair of connection holes. The rotating shaft 2 is arranged on the upper wing surface of the wing. A wing pressing device for providing unfolding power for the folding wing 4 is provided on the rotating shaft 2. The first rotating shaft plate 6 and the second rotating shaft plate 7 are respectively arranged to match the shapes of the movable connection ends of the folding wing 4 and the fixed wing 5; and both between the first rotating shaft plate 6 and the folding wing 4, and between the second rotating shaft plate 7 and the fixed wing 5 are adhesively fixed. As shown in Figure 1 , the wing pressing device includes: a torsion spring 1 is provided on the rotating shaft 2 between a pair of connection holes. The two ends of the torsion spring 1 are respectively fixed on the folding wing 4 and the fixed wing 5, providing unfolding power for the folding wing 4. The two ends of the torsion spring 1 are respectively fixed in the second fixing groove 41 and the first fixing groove 51 provided on the folding wing 4 and the fixed wing 5.

[0014] As shown in Figure 3 and Figure 4As shown in the figure, on the lower wing surface of the wing, there is a pin cabin 71 installed on the second rotating shaft plate 7. A pair of pins 10 and a spring 8 are installed in the pin guiding cavity of the pin cabin 71; the spring 8 is arranged between the pair of pins 10; Axially on the pin cabin 71, there are a first card slot 52 and a second card slot 53 arranged in parallel and communicating with each other. The first card slot 52 is arranged close to one end of the fixed wing 5, and the length of the first card slot 52 is greater than that of the second card slot 53; A pair of machine screw 9 is fixedly connected to the pair of pins 10, so that when the pair of machine screw 9 drives the pair of pins 10 to squeeze the spring 8, it can be clamped in the second card slot 53. When the pair of machine screw 9 drives the pair of pins 10 to transfer from the first card slot 52 to the second card slot 53, and the spring 8 pushes the pair of pins 10 out from the two ends of the pin cabin 71, the pair of machine screw 9 can be clamped in the first card slot 52; Meanwhile, on the first rotating shaft plate 6, there are a pair of jacks 12 corresponding to the two ends of the pin cabin 71 respectively. Between the pair of jacks 12, there is a striker 11. The striker 11 is used to push the machine screw 9 in the second card slot 53 into the first card slot 52 when the folding wing 4 is fully unfolded. At this time, as Figure 5 shown, after the spring 8 pushes the pair of pins 10 out to the jacks 12, the unfolding and locking of the folding wing 4 is completed.

[0015] When the locking device is manually reset, the machine screw 9 is driven to return to the second card slot 53.

[0016] In order to further illustrate the technical solution and effect of the present invention, the working mode of the present invention is described in detail according to the attached drawings: As Figures 1-4 shown, the folding direction of the drone wing unfolding and locking mechanism is along the wing span direction. A folding rotating shaft 2 is arranged on the upper wing surface. The rotating shaft 2 passes through the first rotating shaft plate 6 and the second rotating shaft plate 7. A torsion spring 1 is arranged in the middle of the rotating shaft 2. The two ends of the torsion spring 1 are respectively placed on the folding wing 4 and the fixed wing 5 to provide unfolding power for the folding wing to unfold.

[0017] The first rotating shaft plate 6 is fixedly connected to the folding wing 4 in an adhesive form, and the second rotating shaft plate 7 is fixedly connected to the fixed wing 5 in the same way; An unfolding and locking mechanism is arranged on the lower wing surface. Two groups of pins 10 are arranged in the second rotating shaft plate 7. Machine screws 9 are installed on the pins 10, so that the pins 10 can move along the guiding groove inside the fixed wing rotating shaft block 7. A spring 8 is arranged between the two groups of pins 10 to provide the extending power for the pins 10. A striker 11 is arranged on the folding wing rotating shaft block 6 to strike the machine screw 9, so as to trigger the extending and locking work of the pins 10.

[0018] Next, in combination with Figure 3 , Figure 4 , Figure 5The embodiments illustrate the working process of the present invention.

[0019] When the wing of the present invention is in the folded state, the wing folds along the chord length direction. The folding wing 4 folds around the rotating shaft 2, and the upper surface of the folding wing 4 adheres to the upper surface of the fixed wing 5. The latch 10 is in the position to be released, and its position to be released is locked by the machine screw 9 on the latch 10 and the guiding groove on the second rotating shaft plate 7.

[0020] When the wing unfolds, driven by the torsion spring 1, the folding wing 4 rotates around the rotating shaft 2. When the rotation reaches the position, the striker 11 designed on the first rotating shaft plate 6 will strike the machine screw 9, causing it to rotate 30 degrees around the latch 10, switching from the position to be released to the released position. Under the action of the spring 8, the latches 10 at both ends extend outwards and are locked in the locking holes on the first rotating shaft plate 6, realizing the locking of the unfolded position of the folding wing 4.

[0021] The fixed-wing aircraft involved in the present invention adopts a folding wing unfolding and locking mechanism designed with a torsion spring, a latch, a spring, a striker, and a guiding groove, which has the advantages of small occupied space, reliable operation, simple structure, small resistance for the folding wing to unfold, mature manufacturing process, low processing cost, convenient installation and maintenance; and is applicable to various types of folding unmanned aerial vehicles.

[0022] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An unfolding and locking mechanism for a folding wing of an unmanned aerial vehicle, characterized in that, It includes a fixed wing (5) and a folding wing (4) that is foldably connected to the fixed wing (5) in the span direction of the fixed wing (5). When unfolded, the folding wing (4) and the fixed wing (5) are combined to form a wing. A first rotating shaft plate (6) and a second rotating shaft plate (7) are respectively installed on the movable connection ends of the fixed wing (5) and the folding wing (4), and are hinged on a rotating shaft (2) through a pair of connection holes. The rotating shaft (2) is arranged on the upper wing surface of the wing, and a wing pressing device for providing unfolding power for the folding wing (4) is provided on the rotating shaft (2). On the lower wing surface of the wing, a latch cabin (71) installed on the second rotating shaft plate (7) is provided. A pair of latches (10) and a spring (8) are installed in the latch guiding cavity of the latch cabin (71). The spring (8) is arranged between the pair of latches (10). An axially parallel and communicating first slot (52) and second slot (53) are provided in the latch cabin (71). The first slot (52) is arranged near one end of the fixed wing (5), and the length of the first slot (52) is greater than that of the second slot (53). A pair of setscrew (9) is fixedly connected to the pair of latches (10), and when the pair of setscrew (9) drives the pair of latches (10) to squeeze the spring (8), it can be clamped in the second slot (53). When the pair of setscrew (9) drives the pair of latches (10) to transfer from the first slot (52) to the second slot (53), and the spring (8) pushes the pair of latches (10) out from the two ends of the latch cabin (71), the pair of setscrew (9) can be clamped in the first slot (52). At the same time, a pair of jacks (12) corresponding to the two ends of the latch cabin (71) are provided on the first rotating shaft plate (6), and a striker (11) is arranged between the pair of jacks (12). The striker (11) is used to push the setscrew (9) in the second slot (53) into the first slot (52) when the folding wing (4) is fully unfolded. At this time, after the spring (8) pushes the pair of latches (10) into the jacks (12), the unfolding locking of the folding wing (4) is completed.

2. The unfolding and locking mechanism for the folding wing of the drone according to claim 1, wherein The described wing pressing device includes: A torsion spring (1) is provided on the rotating shaft (2) between the pair of connection holes. The two ends of the torsion spring (1) are respectively fixed on the folding wing (4) and the fixed wing (5) to provide unfolding power for the folding wing (4).

3. The unfolding and locking mechanism of the folding wing of the drone according to claim 2, characterized in that, The two ends of the torsion spring (1) are respectively fixed in the second fixing groove (41) and the first fixing groove (51) provided on the folding wing (4) and the fixed wing (5).

4. The unfolding and locking mechanism for the folding wing of the drone according to claim 1, characterized in that, The described first rotating shaft plate (6) and the second rotating shaft plate (7) are respectively arranged to match the shapes of the movable connection ends of the folding wing (4) and the fixed wing (5).

5. The unfolding and locking mechanism for the folding wing of the unmanned aerial vehicle according to any one of claims 1-4, characterized in that The first rotating shaft plate (6) and the folding wing (4), and the second rotating shaft plate (7) and the fixed wing (5) are fixedly connected by gluing.

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