Unmanned aerial vehicle with retractable wings

Abstract

The unmanned aerial vehicle comprises an unmanned aerial vehicle body, a plurality of telescopic arms distributed in the annular direction are arranged on the bottom face of the unmanned aerial vehicle body, each telescopic arm comprises an inner arm and an outer arm which are connected in a telescopic mode, the inner end of each inner arm is rotationally connected with a support on the bottom face of the unmanned aerial vehicle body, and the outer end of each outer arm is connected with a paddle mechanism. A transmission mechanism composed of a driving wheel, a driven wheel and a transmission part connected between the driving wheel and the driven wheel in a winding mode is arranged in the inner arm, the driving wheel is connected with the driving shaft, the driven wheel is rotationally connected into the inner arm, the transmission part is provided with a sliding block, and the sliding block penetrates through a sliding groove formed in the inner arm and then is fixed to the outer arm. The driving wheel is provided with an arc-shaped groove concentric with the rotating center of the driving wheel, the inner arm is provided with a pin column inserted into the arc-shaped groove, the driving shafts corresponding to the telescopic arms are connected with a power mechanism arranged on the unmanned aerial vehicle body through a driving assembly, and the unmanned aerial vehicle is more convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to unmanned plane technical field, concretely relates to a wing retractable unmanned plane. BACKGROUND

[0002] The statements herein only provide background technology related to the utility model, and do not necessarily constitute prior art.

[0003] The unmanned plane is not manned aircraft controlled by radio remote control equipment and self-provided program control device, patent application CN109466741A discloses the rotor unmanned plane including retractable unmanned plane structure, is provided with at least one arm group, the arm group includes multiple arms, multiple arms are rotatably installed on the unmanned plane main body around the same rotation axis in the unfolded position for flight and the folding position for transportation, adopts this kind of mode, the paddle of unmanned plane after folding still is located outside the unmanned plane main body, and the collision damage of paddle is easy to occur when transporting. Patent application CN107856835A discloses an unmanned plane with retractable and foldable wings, the folding support and paddle can be stored in the storage compartment by folding, avoiding the collision damage of the paddle during transportation, but when adopting this scheme, each folding support needs to be folded and stored manually, which is inconvenient to operate and time-consuming. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient of prior art, provide a wing retractable unmanned plane, the wing is convenient and fast to store and take out, improve the convenience of operation.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The embodiment of the utility model provides a wing retractable unmanned plane, including unmanned plane body, the bottom surface of unmanned plane body is equipped with multiple retractable arms distributed along the ring, the retractable arm includes the inner arm and outer arm of telescopic connection, the one end of inner arm is rotatably connected with the support fixed on the bottom surface of unmanned plane body, the outer end of outer arm is connected with paddle mechanism, the inside of inner arm is equipped with closed loop type transmission mechanism, including driving wheel, driven wheel and transmission member around the driving wheel and driven wheel, driving wheel is connected with driving shaft, driven wheel is rotatably connected in the inside of inner arm, transmission member is equipped with sliding block, sliding block is set through the sliding slot of inner arm and is fixed with outer arm, driving wheel is equipped with the arc slot concentric with its rotation center, inner arm is equipped with the pin column inserted into arc slot, the driving shaft corresponding to multiple retractable arms is connected with the power mechanism installed on the unmanned plane body through the driving assembly.

[0007] Optionally, the closed loop type transmission mechanism adopts chain transmission mechanism, the driving wheel is driving sprocket, the driven wheel is driven sprocket, and the transmission member adopts transmission chain around the driving sprocket and driven sprocket.

[0008] Optionally, the outer end of the inner arm is provided with an axle, and the driven wheel is rotationally connected with the axle.

[0009] Optionally, the two sides of the inner arm are provided with a circular groove concentric with the rotation center of the driving wheel, and the support is provided with a circular protrusion embedded in the circular groove, and the inner arm is rotationally connected with the support through the circular groove and the circular protrusion.

[0010] Optionally, the driving shaft is rotationally connected with a first bearing seat fixed on the bottom surface of the UAV body, and the first bearing seat is used for supporting.

[0011] Optionally, the driving shaft is rotationally connected with a first bearing seat fixed on the bottom surface of the UAV body, and the first bearing seat is used for supporting.

[0012] Optionally, the driving assembly comprises transmission shafts corresponding to the telescopic arms, one end of each transmission shaft is connected with the driving shaft through a first bevel gear transmission mechanism, and the other end of each transmission shaft corresponding to the telescopic arms is connected with the power mechanism installed on the UAV body through a second bevel gear transmission mechanism.

[0013] Optionally, the power mechanism adopts a driving bevel gear, and the driving bevel gear is connected with a retractable driving member installed on the UAV body.

[0014] Optionally, the power mechanism adopts a driving bevel gear, and the driving bevel gear is connected with a retractable driving member installed on the UAV body.

[0015] Optionally, the transmission shaft is rotationally connected with at least one second bearing seat fixed on the bottom surface of the UAV body, and the second bearing seat is used for supporting.

[0016] Optionally, the bottom surface of the UAV body is further provided with a support, and the support adopts a frame structure and has a space allowing the telescopic arm to rotate and stretch.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a wing retractable unmanned plane, the inside arm is equipped with closed loop type transmission mechanism, and its transmission piece is connected with the outer arm through the sliding block, can realize the extension and contraction between the inside arm and the outer arm, when the sliding block slides in place in the sliding slot, the pin column contacts with the end of arc slot, when the driving assembly continues to drive the driving wheel to rotate through the driving shaft, the driving wheel can drive the inside arm to rotate through the pin column, thereby make the whole telescopic arm realize the mode of retraction in the unmanned plane body below or spread in the unmanned plane body periphery through the rotation, the driving assembly connected to the telescopic arm of a plurality of is connected to same power mechanism, and the power mechanism can realize the synchronous automatic contraction and expansion of a plurality of telescopic arms through the driving assembly, need not manual contraction and expansion operation to it in turn, operation is more convenient and fast, has improved the operation convenience of use personnel, and the propeller blade is located unmanned plane body below in the contraction state, avoids the collision damage of propeller blade in the transportation process. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not limit the application.

[0020] Figure 1 It is the overall structure front view of the utility model embodiment 1,

[0021] Figure 2 It is the overall structure bottom view of the utility model embodiment 1 after removing support,

[0022] Figure 3 It is the schematic diagram of telescopic arm in the expansion state of the utility model embodiment 1,

[0023] Figure 4 It is the plan view of telescopic arm in the expansion state of the utility model embodiment 1,

[0024] Figure 5 It is the schematic diagram of telescopic arm in the contraction state of the utility model embodiment 1,

[0025] Figure 6 It is the schematic diagram of sliding block and sliding slot cooperation of the utility model embodiment 1,

[0026] Figure 7 It is the overall structure front view of the utility model embodiment 2,

[0027] The components are as follows: 1. UAV body, 2. Inner arm, 3. Outer arm, 4. Propeller motor, 5. Propeller blade, 6. Support plate, 7. Annular protrusion, 8. Drive sprocket, 9. Driven sprocket, 10. Transmission chain, 11. Sprocket shaft, 12. Drive shaft, 13. First bearing housing, 14. Arc groove, 15. Pin, 16. Slider, 17. Slide groove, 18. Transmission shaft, 19. First bevel gear, 20. Second bevel gear, 21. Drive bevel gear, 22. Third bevel gear, 23. Retraction and extension drive motor, 24. Outer cover, 25. Second bearing housing, 26. Bracket, 27. Support shaft, 28. Handle, 29. Annular groove. Detailed Implementation

[0028] For ease of description, the use of the words "upper" and "lower" in this utility model only indicates that the direction is consistent with the upper and lower directions of the accompanying drawings. They do not limit the structure and are merely for the purpose of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example 1

[0030] This embodiment provides a drone with retractable wings, such as... Figures 1-2 As shown, it includes the drone body 1. The drone body 1 can be made using existing drone technology, and its specific structure will not be described in detail here.

[0031] The bottom surface of the drone body 1 is provided with multiple wings. In this embodiment, the drone is a quadcopter drone. The bottom surface of the drone body is provided with four wings. The four wings are evenly distributed along the circumference of the drone body, that is, the interval between two adjacent wings is 90°.

[0032] In this embodiment, as Figures 3-5 As shown, the wing includes a telescopic arm, which includes an inner arm 2 and an outer arm 3 that are telescopically connected. Both the inner arm 2 and the outer arm 3 adopt a square tube structure. Both ends of the inner arm 2 are detachably connected with bolts and caps. The outer end of the inner arm 2 is inserted into the inner end of the outer arm 3. The inner end of the outer arm 3 is open and the outer end is detachably connected with bolts and caps. The outer surface of the inner arm 2 and the inner surface of the outer arm 3 slide against each other to realize the telescopic connection between the inner arm 2 and the outer arm 3.

[0033] The outer end of the outer arm 3 is provided with a blade mechanism. The blade mechanism can adopt existing technology, including a blade motor 4 with its axis arranged vertically. The output shaft of the blade motor 4 is connected to the blade shaft. Multiple blades 5 are arranged on the blade shaft in a circumferential direction. The blade mechanism can adopt existing technology, and its further technical details will not be described in detail here.

[0034] The inner end of the inner arm 2 is rotatably connected to the support, and the inner arm 2 can swing around a set axis, thereby realizing the switching between the telescopic arm being extended and retracted under the drone body.

[0035] Specifically, each side of the inner arm 2 is provided with an annular groove. The support includes two support plates 6, which are located on both sides of the inner arm 2. The support plates 6 are provided with annular protrusions 7 that match the annular grooves. The annular protrusions 7 are embedded in the annular grooves. The groove surfaces of the annular protrusions 7 and the annular grooves are slidably connected so that the inner arm and the support plates 6 are rotatably connected. The friction between the annular protrusions 7 and the annular grooves achieves the locking of the inner arm 2 and the support plates 6 in their natural state. The inner arm 2 only rotates when it is subjected to a certain load.

[0036] Furthermore, the bottom end of the support plate 6 is provided with a mounting boss, which is fixed to the bottom surface of the UAV body 1 by bolts.

[0037] Furthermore, the support plate 6 is made of plastic. When the inner arm 2 is installed, the end of the inner arm 2 is inserted between the two support plates 6. The two support plates 6 can deform to facilitate the insertion of the end of the inner arm 2. The inner arm 2 is inserted between the two support plates 6 until the annular protrusion 7 and the annular groove are engaged.

[0038] The inner arm 2 is equipped with a transmission mechanism. In this embodiment, the transmission mechanism is a closed-loop transmission mechanism, which includes a driving wheel, a driven wheel, and a transmission component connected between the driving wheel and the driven wheel.

[0039] Preferably, the transmission mechanism is a chain drive mechanism, with the driving wheel being a driving sprocket 8, the driven wheel being a driven sprocket 9, and the transmission component being a transmission chain 10 wound between the driving sprocket 8 and the driven sprocket 9.

[0040] The drive sprocket 8 is located at the inner end of the inner arm 2 and is concentrically arranged with the annular protrusion 7 and the annular groove.

[0041] Driven sprocket 9 is located at the outer end of inner arm 2, and sprocket shaft 11 is fixed at the outer end of inner arm 2. Driven sprocket 9 is rotatably connected to sprocket shaft 11.

[0042] The drive sprocket 8 is connected to one end of the drive shaft 12. The drive shaft 12 extends to the outside of the inner arm 2 through an opening provided in the inner arm 2 and a side support plate. The diameter of the opening is larger than the diameter of the drive shaft 12.

[0043] The portion of the drive shaft 12 extending outside the inner arm 2 is rotatably connected to the first bearing seat 13, which is fixed to the bottom surface of the UAV body 1 by bolts. The first bearing seat 13 supports the drive shaft 12, thereby achieving the positioning of the drive shaft 12 and the drive sprocket 8.

[0044] The drive sprocket 8 is provided with an arc-shaped groove 14. The arc-shaped groove 14 is a semi-circular arc groove. The semi-circular arc groove is concentric with the rotation center of the drive sprocket 8, that is, the center of the semi-circular arc groove is located on the axis of the drive shaft 12 and the drive sprocket 8.

[0045] The inner side of the inner arm 2 is provided with a pin 15 for inserting into the arc-shaped groove 14.

[0046] When the drive sprocket 8 rotates until the pin 15 contacts the end groove surface of the arc groove 14, the drive sprocket 8 continues to rotate, which can drive the inner arm 2 to rotate.

[0047] like Figure 6 As shown, the transmission chain 10 is fixedly connected to a slider 16. The slider 16 passes through the groove 17 provided in the inner arm 2 and is fixedly connected to the inner side of the outer arm 3. The slider 16 is slidably connected to the groove surface of the groove 17. When the drive sprocket 8 drives the transmission chain 10 to move, the transmission chain 10 can drive the outer arm 3 to move through the slider 16, thereby realizing the telescopic movement between the outer arm 3 and the inner arm 2.

[0048] The drive shaft 12 extends to the end of the inner arm 2 and is connected to a drive assembly. The drive assemblies connected to the drive shafts of the four telescopic arms are all connected to the same power mechanism. The power mechanism is installed on the UAV body and is used to drive the drive shaft to rotate around its own axis through the drive assembly, thereby driving the active sprocket to rotate.

[0049] In this embodiment, the drive assembly includes a drive shaft 18, one end of which is connected to the drive shaft 12 via a first bevel gear transmission mechanism.

[0050] Specifically, the first bevel gear transmission mechanism includes a first bevel gear 19 fixed to one end of the drive shaft 12, the first bevel gear 19 meshing with a second bevel gear 20, and the second bevel gear 20 fixed to the end of the transmission shaft 18.

[0051] Furthermore, the first bevel gear 19 and the second bevel gear 20 are both located inside the outer cover (not shown in the figure). The outer cover is fixed to the outer side of the support plate 6 to protect the first bevel gear 19 and the second bevel gear 20. The transmission shaft 18 and the drive shaft 12 are rotatably connected to the outer cover through bearings.

[0052] The other end of the drive shaft 18 is connected to the power mechanism through a second bevel gear structure. In this embodiment, the power mechanism adopts a drive bevel gear 21. Correspondingly, the second bevel gear structure includes a third bevel gear 22, which meshes with the drive bevel gear 21.

[0053] The third bevel gear 22 is mounted on the drone body 1. In this embodiment, the drone body 1 is provided with a retraction drive component. In this embodiment, the retraction drive component is a retraction drive motor 23. The housing of the retraction drive motor 23 is fixed on the drone body 1 through the mounting groove provided on the bottom surface of the drone body 1. The output shaft of the retraction drive motor 23 meshes with the drive bevel gear 21.

[0054] The retraction drive motor 23 can drive the drive bevel gear 21 to rotate, thereby driving the drive shaft 12 to rotate through the second bevel gear transmission mechanism and the first bevel gear transmission mechanism.

[0055] Furthermore, the third bevel gear 22 and the drive bevel gear 21 are both located inside the outer cover 24. The outer cover is fixed to the bottom surface of the UAV body to protect the third bevel gear 22 and the drive bevel gear 21. The output shaft of the transmission shaft 18 and the retraction drive motor 23 are rotatably connected to the outer cover 24 through bearings.

[0056] Furthermore, the drive shaft 18 is rotatably connected to at least one second bearing seat 25. In this embodiment, the drive shaft 18 is rotatably connected to two second bearing seats 25. The second bearing seats 25 are fixed to the bottom surface of the UAV body 1 by bolts, and the drive shaft is supported by the second bearing seats 25.

[0057] In this embodiment, the size of the drone body 1 meets the requirement that the four telescopic arms can be simultaneously retracted under the drone body 1 when extended. The specific size can be set according to actual needs and will not be described in detail here.

[0058] Furthermore, the bottom surface of the drone body 1 is also provided with a support 26. The support 26 adopts a frame structure, including four vertical rods fixed to the bottom surface of the drone body. A horizontal bar is provided between two vertical rods on the same side. The length of the vertical rods allows the support to leave space for the telescopic arm to swing when the telescopic arm is in its maximum extended state, i.e., its longest length.

[0059] The retraction drive motor 23 is connected to the control system of the UAV and its operation is controlled by the control system.

[0060] This embodiment only improves the structure of the UAV wing; the rest of the UAV structure can be constructed using existing technology and will not be described in detail here.

[0061] The retraction process of the retractable UAV wing in this embodiment is as follows:

[0062] The retraction drive motor 23 drives the drive bevel gear 21 to rotate forward. This, in turn, drives the drive shaft 12 to rotate via the second bevel gear transmission mechanism, the drive shaft 18, and the first bevel gear transmission mechanism. The drive shaft 12 then drives the drive sprocket 8 to rotate. Due to the presence of the arc-shaped groove 14, the pin 15 slides within it, the inner arm 2 does not rotate, the drive sprocket 8 rotates actively around its own axis, and the driven sprocket 9 rotates passively around its own axis. The transmission chain 10 drives the outer arm 3 to retract via the slider 16. The length of the arc-shaped groove 14 matches the length of the slide groove 17. When the slider 16... When one end of the slide 17 moves to the other end, the pin 15 also moves from one end of the arc groove 14 to the other end, thus completing the retraction process of the telescopic arm. The drive shaft 12 continues to drive the active sprocket 8 to rotate. Under the combined action of the arc groove 14 and the pin 15, the inner arm 2 rotates and swings towards the inside of the drone body 1. At this time, the driven sprocket 9 only makes a revolution around the rotation axis of the inner arm 2 without rotating around its own axis. Under the action of the drive shaft 12, the inner arm 2 rotates 180° towards the inside of the drone body 1, so that the entire telescopic arm is retracted under the drone body 1.

[0063] The deployment process of the retractable UAV wing in this embodiment is as follows:

[0064] The retraction drive motor 23 drives the drive bevel gear 21 to rotate in the opposite direction. This, in turn, drives the drive shaft 18 to rotate via the second bevel gear transmission mechanism, the drive shaft, and the first bevel gear transmission mechanism. The drive shaft 18 then drives the drive sprocket 8 to rotate. Due to the presence of the arc-shaped groove 14, the pin 15 slides within it, the inner arm 2 does not rotate, the drive sprocket 8 performs an active rotational motion around its own axis, and the driven sprocket 9 performs a passive rotational motion around its own axis. The transmission chain 10 drives the outer arm 3 to extend via the slider 16. The length of the arc-shaped groove 14 matches the length of the slide groove 17. When the slider... When 16 moves from one end of the slide groove 17 to the other end, pin 15 also moves from one end of the arc groove 14 to the other end, completing the extension process of the telescopic arm. The drive shaft 12 continues to drive the active sprocket 8 to rotate. Under the combined action of the arc groove 14 and pin 15, the inner arm 2 swings towards the outside of the UAV body 1. At this time, the driven sprocket 9 only makes a revolution around the rotation axis of the inner arm 2 without rotating around its own axis. Under the action of the drive shaft 12, the inner arm 2 rotates 180° towards the outside of the UAV body 1, realizing the deployment of the UAV wing.

[0065] In this embodiment, the drone's drive bevel gear 21 can achieve synchronous automatic retraction and deployment of multiple telescopic arms through the second bevel gear transmission mechanism, the transmission shaft 18, and the first bevel gear transmission mechanism. This eliminates the need for manual retraction and deployment operations, making operation more convenient and faster, and improving the ease of use for users. At the same time, in the retracted state, the propellers are located below the drone body, avoiding collision damage to the propellers during transportation.

[0066] Example 2

[0067] This embodiment provides a drone with retractable wings, such as... Figure 7 As shown, compared with Embodiment 1, the only difference is that the drive bevel gear 21 is rotatably connected to the support shaft 27 via a bearing. The support shaft 27 is fixed to the bottom surface of the UAV body 1. A handle 28 is provided at the eccentric position of the bottom surface of the drive bevel gear 21. The user can drive the drive bevel gear to rotate through the handle 28. Correspondingly, the outer cover 24 of the third bevel gear and the drive bevel gear is provided with an annular groove 29 for the handle 28 to pass through. The handle 28 can slide along the annular groove 29, thereby driving the drive bevel gear 21 to rotate.

[0068] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0069] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A retractable-wing unmanned aerial vehicle (UAV), comprising a UAV body, characterized in that, The bottom surface of the drone body is provided with multiple telescopic arms distributed in a circumferential direction. The telescopic arms include an inner arm and an outer arm that are telescopically connected. The inner end of the inner arm is rotatably connected to a support on the bottom surface of the drone body, and the outer end of the outer arm is connected to a propeller mechanism. The inner arm is provided with a transmission mechanism consisting of a drive wheel, a driven wheel, and a transmission component that is wound around the drive wheel and the driven wheel. The drive wheel is connected to a drive shaft, and the driven wheel is rotatably connected inside the inner arm. The transmission component is provided with a slider. The slider passes through a groove provided in the inner arm and is fixed to the outer arm. The drive wheel is provided with an arc-shaped groove concentric with its rotation center, and the inner arm is provided with a pin that is inserted into the arc-shaped groove. The drive shafts corresponding to the multiple telescopic arms are connected to the power mechanism provided in the drone body through a drive assembly.

2. The retractable-wing drone as described in claim 1, characterized in that, The transmission mechanism adopts a chain drive mechanism, with the driving wheel being a driving sprocket and the driven wheel being a driven sprocket. The transmission component is a transmission chain that is wound between the driving sprocket and the driven sprocket.

3. The retractable-wing drone as described in claim 1, characterized in that, The inner arm has an axle at its outer end, and the driven wheel is rotatably connected to the axle.

4. The retractable-wing drone as described in claim 1, characterized in that, The inner arm has annular grooves on both sides that are concentric with the rotation center of the drive wheel, and the support has annular protrusions that are embedded in the circular grooves. The inner arm is rotatably connected to the support through the annular grooves and the annular protrusions.

5. The retractable-wing drone as described in claim 1, characterized in that, The drive shaft is rotatably connected to a first bearing seat fixed to the bottom surface of the UAV body, and is supported by the first bearing seat.

6. The retractable-wing drone as described in claim 1, characterized in that, The drive assembly includes a drive shaft corresponding to the telescopic arm. One end of the drive shaft is connected to the drive shaft through a first bevel gear transmission mechanism, and the other end of the drive shaft corresponding to all telescopic arms is connected to the power mechanism installed on the UAV body through a second bevel gear transmission mechanism.

7. The retractable-wing drone as described in claim 6, characterized in that, The power mechanism uses a drive bevel gear, which is connected to the retraction and extension drive unit installed on the UAV body.

8. A retractable-wing drone as described in claim 6, characterized in that, The power mechanism uses a drive bevel gear, and a handle is provided on the drive bevel gear.

9. A retractable-wing drone as described in claim 6, characterized in that, The drive shaft is rotatably connected to at least one second bearing seat fixed to the bottom surface of the UAV body, and is supported by the second bearing seat.

10. A retractable-wing drone as described in claim 1, characterized in that, The bottom surface of the drone body is also equipped with a support frame, which has a frame structure and provides space for the telescopic arm to rotate and extend.

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