A Plug-and-Play Arm Locking and Anti-Loosening Device for Multi-Rotor UAVs and the UAV

Abstract

The present invention relates to a plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle and an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicles, which can improve the disadvantages of complex folding arm locking structure being prone to fatigue loosening and solve the problem that the plug-in type arm locking structure only locks without preventing the arm from loosening; the device includes an arm, a threaded locking ring, a loosening prevention mechanism, a guide ring and an arm seat; the threaded locking ring is sleeved at the connection between the arm and the arm seat and is threadedly connected with the arm seat; the loosening prevention mechanism is arranged on the arm and is connected with the threaded locking ring; the guide ring is fixedly arranged at the connection end of the arm and is positioned and connected with the connection end of the arm seat; the threaded locking ring is provided with an internal thread, a retaining ring at the end and meshing teeth; the internal thread is threadedly connected with the arm seat; the retaining ring presses against the guide ring to make it closely connected with the arm seat; the meshing teeth are meshingly connected with the meshing teeth in the loosening prevention mechanism to play a role in preventing loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and particularly to a plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle and an unmanned aerial vehicle. Background Art

[0002] With the maturity of small multi-rotor unmanned aerial vehicle technology and the expansion of application fields, in order to improve the portability of unmanned aerial vehicles and their ability to quickly deploy and recover, it is necessary to design connection locking mechanisms for some components on the aircraft. As a main component of a multi-rotor unmanned aerial vehicle, in order to reduce its occupied space, most current unmanned aerial vehicles adopt a foldable locking structure. However, since the arm is still connected to the fuselage, the space utilization rate cannot be maximized. Moreover, the existing arm folding and locking structure is complex, and key structural components are prone to fatigue damage after long-term folding, resulting in loose connection at the arm folding part, increasing the vibration of the aircraft and threatening flight safety. For the remaining aircraft with a plug-in type arm locking structure, most focus on mechanical positioning and locking, and there is no anti-loosening measure to ensure that the arm does not become loose during flight vibration.

[0003] Therefore, it is necessary to study a new plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle to address the deficiencies of the existing technology and solve or mitigate one or more of the above problems. Summary of the Invention

[0004] In view of this, the present invention provides a plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle and an unmanned aerial vehicle, which can improve the disadvantages of the complex and easily fatigued and loosened folding type arm locking structure and solve the problem that the plug-in type arm locking structure only locks without preventing the arm from becoming loose.

[0005] On the one hand, the present invention provides a plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle. The device includes an arm, a threaded locking ring, an anti-loosening mechanism, a guiding ring, and an arm seat;

[0006] The threaded locking ring is sleeved at the connection between the arm and the arm seat and is threadedly connected to the arm seat;

[0007] The anti-loosening mechanism is arranged on the arm and is connected to the threaded locking ring;

[0008] The guiding ring is fixedly arranged at the connection end of the arm and is connected to the connection end of the arm seat in a positioning manner.

[0009] In the above aspect and any possible implementation manner, a further implementation manner is provided. The threaded locking ring includes an annular body, meshing teeth, a retaining ring, and internal threads;

[0010] The retaining ring is arranged at one end of the annular body and is used to block the guiding ring so as to tightly connect it to the arm seat;

[0011] The engaging teeth are arranged at the outer end of the retaining ring and are used for engaging connection with the anti-loosening mechanism;

[0012] The internal thread is arranged on the inner wall of the annular body and is connected with the external thread arranged on the machine arm base.

[0013] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein the outer wall of the annular body is provided with knurling.

[0014] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein the annular body, the engaging teeth, the retaining ring and the internal thread are integrally connected.

[0015] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein the anti-loosening mechanism includes a button, a spring block, a spring, a spring barrel and spring block engaging teeth;

[0016] The spring barrel is fixedly arranged inside the machine arm, and the spring is arranged inside the spring barrel;

[0017] The lower end of the button passes through a button assembly hole arranged on the machine arm and is connected with the spring block; the bottom of the spring block is connected with the upper end of the spring;

[0018] The spring block engaging teeth are fixedly connected with the spring block, and move downwards and upwards with the pressing force applied to the button and the restoring elastic force of the spring when not pressed;

[0019] After the spring block engaging teeth move upwards, they protrude from an engaging tooth assembly hole arranged on the machine arm wall and are engaged and connected with the engaging teeth of the threaded locking ring.

[0020] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein a long strip-shaped guiding groove is formed on the side wall of the spring barrel; the spring block engaging teeth are fixedly connected with the spring block through an extension piece, and the extension piece is located inside the guiding groove.

[0021] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein a long strip-shaped guiding groove is formed on the side wall of the spring barrel; a horizontal guiding strip is arranged on one side of the spring block, and the guiding strip is located inside the guiding groove.

[0022] In the above-mentioned aspects and any possible implementation manners, a further implementation manner is provided, wherein a plurality of positioning convex platforms are arranged on the guiding ring; a plurality of corresponding positioning grooves are arranged at the end of the machine arm base; the positioning convex platforms are embedded in the positioning grooves.

[0023] For the aspects and any possible implementation manners described above, a further implementation manner is provided, in which the outer wall of the guiding ring is connected to the inner wall of the threaded locking ring.

[0024] For the aspects and any possible implementation manners described above, a further implementation manner is provided, in which a plurality of first fixing holes are provided on the guiding ring, a plurality of second fixing holes are provided on the arm wall, the first fixing holes and the second fixing holes are arranged in one-to-one correspondence, and the guiding ring and the arm are fixedly connected by inserting fixing members.

[0025] On the other hand, the present invention provides a multi-rotor unmanned aerial vehicle, which includes a fuselage and the plug-in type arm locking and anti-loosening device described above; the arm seat of the plug-in type arm locking and anti-loosening device is fixedly connected to the fuselage.

[0026] Compared with the prior art, one of the technical solutions in the above technical solutions has the following advantages or beneficial effects: The whole device of the present invention is simple in form, compact in structure, light in weight, stable and reliable, and the arm can be quickly disassembled, further improving the space utilization rate;

[0027] Another one of the above technical solutions has the following advantages or beneficial effects: The present invention adopts a plug-in form unlocked by a button, and the key structural members are not repeatedly folded and stressed, improving the connection strength, extending the service life, and ensuring flight safety;

[0028] Another one of the above technical solutions has the following advantages or beneficial effects: The present invention adopts a redundancy design, adds an anti-loosening mechanism, and after the threaded locking ring is tightened, the spring drives the elastic block to automatically lock and stop rotation, ensuring that the arm does not become loose during the flight vibration of the aircraft.

[0029] Of course, it is not necessary for any product implementing the present invention to achieve all the above-described technical effects simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic diagram of the overall structure of a plug-in type arm locking and anti-loosening device of a multi-rotor unmanned aerial vehicle provided by an embodiment of the present invention;

[0032] Figure 2 It is a detailed diagram of the structural features of a threaded locking ring provided by an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the pluggable arm locking and anti-loosening device of a multi-rotor UAV provided by an embodiment of the present invention after removing the arm;

[0034] Figure 4 It is an exploded schematic diagram of the anti-loosening mechanism provided by an embodiment of the present invention;

[0035] Figure 5 It is a sectional view in the locked state provided by an embodiment of the present invention.

[0036] Among them, in the figure:

[0037] 1. Arm; 2. Threaded locking ring; 3. Arm seat; 4. Anti-loosening mechanism; 5. Guide ring;

[0038] 21. Meshing teeth; 22. Retaining ring; 23. Knurling; 24. Internal thread;

[0039] 31. Positioning groove; 32. External thread;

[0040] 41. Button; 42. Elastic block; 421. Guide bar; 422. Meshing teeth of the elastic block; 43. Spring; 44. Elastic barrel; 441. Guide groove;

[0041] 51. Positioning boss. Specific embodiments

[0042] In order to better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0044] Aiming at the deficiencies of the prior art, the present invention proposes a pluggable arm locking and anti-loosening device for a multi-rotor UAV, including an arm, a threaded locking ring, an anti-loosening mechanism, a guide ring and an arm seat.

[0045] A positioning hole is provided on the arm for fixing the anti-loosening mechanism and the guide ring.

[0046] The threaded locking ring is provided with meshing teeth, a retaining ring, knurling and an internal thread. The threaded locking ring is sleeved on the arm and is located between the anti-loosening mechanism and the guide ring. The threaded locking ring mainly tightens the guide ring and the arm seat through the rotation of the internal thread, thereby connecting the arm and the fuselage.

[0047] The anti-loosening mechanism includes a button, a spring block, a spring and a spring barrel. The spring block is provided with spring block meshing teeth, and the anti-loosening device cooperates with the meshing teeth on the threaded locking ring through the spring block meshing teeth to prevent loosening of the threaded locking ring. The bottom of the spring barrel is provided with a threaded hole, and the anti-loosening mechanism is fixed inside the arm through the threaded hole at the bottom of the spring barrel.

[0048] The guiding ring is fixed on the arm, and three positioning bosses are arranged on the guiding ring for positioning cooperation with the positioning grooves on the arm base.

[0049] The arm base is fixedly connected to the drone fuselage, and a positioning groove is arranged thereon for positioning cooperation with the positioning bosses on the guiding ring.

[0050] Embodiment 1:

[0051] As Figure 1 shown, the present invention provides a plug-in type arm locking and anti-loosening device for a multi-rotor drone, which includes an arm 1, a threaded locking ring 2, an arm base 3, an anti-loosening mechanism 4 and a guiding ring 5.

[0052] The arm 1 is cylindrical, and positioning holes are arranged thereon for fixing the anti-loosening mechanism 4 and the guiding ring 5.

[0053] In addition to the annular body, the threaded locking ring 2 is also provided with meshing teeth 21, a retaining ring 22, knurling 23 and internal threads 24. As Figure 2 shown, Figure 2 the three sub-diagrams in it are the front view, the sectional view and the three-dimensional view in sequence. Among them, the retaining ring 22 is arranged at one end of the annular body, and the meshing teeth 21 distributed in a ring shape are arranged on the retaining ring 22; internal threads 24 are arranged on the inner wall of the annular body, and knurling 23 is arranged on the outer wall; the annular body, the meshing teeth 21, the retaining ring 22, the knurling 23 and the internal threads 24 are all fixedly connected, and can also be prepared into an integral structure by an integral molding process. The threaded locking ring 2 is sleeved on the arm 1, and the sleeving direction is that the end where the retaining ring 22 is located is far from the arm base 3 to be connected. The threaded locking ring 2 is located between the anti-loosening mechanism 4 and the guiding ring 5. Rotate the threaded locking ring 2 clockwise until the retaining ring 22 contacts the guiding ring 5, and rotate and dock the internal threads 24 and the external threads 32 of the arm base 3 to tighten the guiding ring 5 and the arm base 3, and then connect the arm 1 and the fuselage.

[0054] A guiding ring 5 is fixed to the end of the arm 1. Three positioning bosses 51 are provided at the outer end of the guiding ring 5 (i.e., the end close to the arm base 3) for positioning and mating with the positioning grooves 31 provided at the connecting end of the arm base 3. Specifically, the positioning bosses 51 are inserted into the corresponding positioning grooves 31. The other end of the arm base 3 is fixedly connected to the drone fuselage. A number of first fixing holes are provided on the guiding ring 5, and a number of second fixing holes are provided on the arm 1. The first fixing holes and the second fixing holes are arranged in one-to-one correspondence for inserting fixing members to realize the fixed connection between the guiding ring and the arm. The first fixing holes can be provided at the position with the positioning bosses, which has a larger area, facilitating the opening of the fixing holes and improving the fixing strength.

[0055] The anti-loosening mechanism 4 includes a button 41, a spring block 42, a spring 43 and a spring barrel 44. The exploded view of the anti-loosening mechanism 4 is as Figure 4 shown. The spring 43 is arranged inside the spring barrel 44. The lower end of the T-shaped button 41 is provided with an external thread, which is threadedly connected to the internal thread hole provided on the spring block 42 and then placed above the spring 43 inside the spring barrel 44. One side of the spring block 42 is provided with a guiding strip 421, and the other side is provided with a spring block engaging tooth 422. The spring block engaging tooth 422 has a certain extension compared with the spring block 42 and the extension is in a lying L shape. The spring block engaging tooth 422 is located at the vertical high point of the lying L-shaped extension, and its bottom surface is on the same horizontal plane as the top surface of the spring block 42. The spring block engaging tooth 422, the extension and the spring block 42 are integrally connected. The spring barrel 44 is a cylindrical structure with one end open. Opposite vertical long openings (i.e., guiding grooves 441) are provided on the side wall of the open end of the cylindrical structure. The widths of the two long openings respectively match the width of the guiding strip 421 and the width of the extension for connecting the spring block engaging tooth 422. Pressing the button 41 downward compresses the spring 43, and the guiding strip 421 and the extension on the spring block 42 move downward along the guiding grooves 441 on the side wall of the spring barrel 44. The bottom end of the guiding groove limits the maximum degree of spring compression.

[0056] The spring barrel 44 is arranged inside the arm 1, and its bottom is fixedly connected to the bottom inner wall of the arm 1. A button assembly hole is provided on the upper wall of the arm 1 opposite to the spring barrel 44, and a engaging tooth assembly hole is provided beside the button assembly hole. The lower end of the button 41 passes through the button assembly hole and is threadedly connected to the spring block 42 arranged inside the arm. When the button is pressed, the spring block engaging tooth 422 moves downward accordingly. When the button is released, the spring block engaging tooth 422 moves upward under the restoring force of the spring, causing the spring block engaging tooth 422 to protrude from the engaging tooth assembly hole. At this time, the lying L-shaped extension closely adheres to the inner upper wall of the arm. After the spring block engaging tooth 422 protrudes from the arm, it engages with the engaging tooth 21 on the threaded locking ring 2 for engaging connection, thus realizing anti-rotation and anti-loosening of the threaded locking ring 2. A threaded hole is provided at the bottom of the spring barrel 44, and the anti-loosening mechanism 4 is fixed inside the arm 1 through the threaded hole at the bottom of the spring barrel 44.

[0057] The above has introduced in detail a pluggable arm locking and anti-loosening device for a multi-rotor unmanned aerial vehicle and the unmanned aerial vehicle provided by the embodiments of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

[0058] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such commodity or system. Without more limitations, the element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element. "Substantially" means within an acceptable error range, and those skilled in the art can solve the said technical problem within a certain error range and basically achieve the said technical effect.

[0059] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "middle", "lateral", "vertical", etc. is based on the orientation or positional relationship shown in the drawings. In addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. The term "and / or" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

Claims

1. A plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle, characterized in that, The device includes an arm, a threaded locking ring, a loosening prevention mechanism, a guide ring and an arm base; The threaded locking ring is sleeved at the connection between the arm and the arm base and is threadedly connected to the arm base; The loosening prevention mechanism is arranged on the arm and connected to the threaded locking ring; The guide ring is fixedly arranged at the connection end of the arm and is connected to the connection end of the arm base in a positioning manner; The threaded locking ring includes an annular body, meshing teeth, a retaining ring and internal threads; The retaining ring is arranged at one end of the annular body and is used to block the guide ring to make it closely connected to the arm base; The meshing teeth are arranged at the outer end of the retaining ring and are used to be meshed and connected with the loosening prevention mechanism; The internal threads are arranged on the inner wall of the annular body and are connected to the external threads arranged on the arm base; The loosening prevention mechanism includes a button, a spring block, a spring, a spring barrel and spring block meshing teeth; The spring barrel is fixedly arranged inside the arm, and the spring is arranged inside the spring barrel; The lower end of the button passes through a button assembly hole arranged on the arm and is connected to the spring block; the bottom of the spring block is connected to the upper end of the spring; The spring block meshing teeth are fixedly connected to the spring block and move down and up with the pressing force applied to the button and the restoring elastic force of the spring when not pressed; After the spring block meshing teeth move up, they protrude from a meshing tooth assembly hole arranged on the arm wall and are meshed and connected with the meshing teeth of the threaded locking ring.

2. The plug-in type arm locking and anti-loosening device for a multi-rotor unmanned aerial vehicle according to claim 1, wherein The outer wall of the annular body is provided with knurling.

3. The plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle according to claim 1, wherein, The annular body, the meshing teeth, the retaining ring and the internal threads are integrally connected.

4. The plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle according to claim 1, wherein, A long strip-shaped guide groove is arranged on the side wall of the spring barrel; the spring block meshing teeth are fixedly connected to the spring block through an extension piece, and the extension piece is located in the guide groove.

5. The plug-in type arm locking and anti-loosening device for a multi-rotor unmanned aerial vehicle according to claim 1, characterized in that, A long strip-shaped guide groove is arranged on the side wall of the spring barrel; a horizontal guide strip is arranged on one side of the spring block, and the guide strip is arranged in the guide groove.

6. The plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle according to claim 1, wherein, A plurality of positioning bosses are arranged on the guide ring; a plurality of corresponding positioning grooves are arranged at the end of the arm base; the positioning bosses are embedded in the positioning grooves.

7. The plug-in type arm locking and loosening prevention device for a multi-rotor unmanned aerial vehicle according to claim 1, characterized in that, A plurality of first fixing holes are arranged on the guide ring, and a plurality of second fixing holes are arranged on the arm wall. The first fixing holes and the second fixing holes are arranged in one-to-one correspondence, and the guide ring and the arm are fixedly connected by inserting fixing pieces.

8. A multi-rotor unmanned aerial vehicle, characterized in that, The multi-rotor unmanned aerial vehicle includes a fuselage and the plug-in type arm locking and loosening prevention device according to any one of claims 1-7; the arm base of the plug-in type arm locking and loosening prevention device is fixedly connected to the fuselage.

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