Multi-axis unmanned aerial vehicle arm connecting structure

Abstract

The invention discloses a multi-axis unmanned aerial vehicle arm connecting structure, and relates to the technical field of unmanned aerial vehicle arm structures. The vehicle arm comprises a first vehicle arm body and a second vehicle arm body which can be rapidly disassembled and assembled, the first vehicle arm body comprises an inserting pipe and a first connecting pipe which are coaxial, a baffle ring is coaxially fixed to the outer side of the inserting pipe, lock seat parts are symmetrically arranged on the outer side of the baffle ring, each lock seat part comprises a pair of lock blocks, and lock grooves are formed in the sides, facing the first connecting pipe, of the lock blocks; the second vehicle arm comprises a socketed pipe and buckling parts arranged on the outer side of the socketed pipe at equal intervals in the circumferential direction, and the key point is that the center line of a pull rod in each buckling part is located on the side, close to the socketed pipe, of the rotating axis of the holding plate. The inserting pipe and the sleeving pipe are matched to limit relative sliding between the first arm and the second arm in the axis direction of the first arm and the second arm, all stress is borne by the pull rod, the pull rod enables the wrench to move tightly close to the sleeving pipe all the time, and in other words, the first arm and the second arm are connected absolutely stably.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a multi-axis unmanned aerial vehicle arm connection structure. Background Art

[0002] A multi-rotor drone, also known as a multi-rotor drone, is a drone that consists of multiple rotor shafts, each with a propeller. Multi-rotor drones are characterized by high stability and maneuverability. Since the rotors of multi-rotor drones can be adjusted in flight, they can remain stable in a variety of different flight states, which makes multi-rotor drones have broad application prospects in aerial photography, surveying and mapping, inspection, agricultural spraying and other fields.

[0003] One of the most important parts of a multi-axis drone is the power assembly, which mainly includes a propeller and an arm for mounting the propeller. For details, see the following prior art: 1. The patent with announcement number CN219325938U specifically discloses that the structure includes a frame body, an arm and a wing mounting seat, wherein the two ends of the arm are slidably plugged into the frame body and the wing mounting seat, and then fixed by glue or screws; however, the arm arranged in this way makes the size of the drone larger, which affects the storage of the drone; Due to storage reasons, there are some detachable and foldable arms on the market, such as: 2. The patent with publication number CN116252985A specifically discloses a structure including a rear wing arm, a foldable device and a front wing arm, and the propeller is installed on the front wing arm; when the drone needs to be stored, the storage volume of the drone is reduced by rotating and folding the front wing arm; however, in actual flight of the drone, the arm needs to bear greater vibration, and the existing rotating structure is difficult to ensure the coaxiality of the front and rear wing arms due to processing, installation and fixing, which makes the flight control of the drone easily unbalanced; In addition, the structures disclosed in announcement numbers CN219257737U and CN113363760B are relatively complex, which is relatively complicated to process and install, resulting in increased costs and poor stability, which is not conducive to the control and assembly of drones; In addition, there are other similar arm assembly structures, but they have one or more of the following problems: 1. The arms can only be unfolded and are not easy to store; 2. Although the arm can be folded and rotated, its structure is relatively complex and requires too high precision in processing and installation; 3. Although the structure of connecting the machine arm by thread is simple, the long structure of the machine arm and the vibration caused by the rotation of the rotor make the thread connection easy to loosen. Based on the above-mentioned factors, there is a need for an arm connection structure that can reduce the storage volume, has a simple structure and is stable in installation. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide a multi-axis UAV arm connection structure.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a multi-axis UAV arm connection structure, comprising a first arm tube and a second arm tube; The first machine arm comprises a plug-in pipe, a lock seat portion and a connecting pipe 1 which are arranged in sequence; The second machine arm includes a sleeve tube and a locking portion that is detachably matched with the locking seat portion; The lock seat portion includes a lock block and a lock slot, wherein the lock slot is arranged on a side of the lock block away from the second machine arm; The locking part includes a lug fixed to the outside of the sleeve tube, a wrench hinged to the lug, and a locking rod assembly arranged on the wrench; The locking rod assembly includes a pull rod with one end rotatably arranged on the wrench and a locking rod engaged with the locking groove; When the plug-in tube is embedded in the sleeve tube and the locking rod is clamped in the locking groove, the axis of the pull rod is located on the side of the rotation axis of the wrench close to the sleeve tube.

[0006] Preferably, a bayonet is provided at one end of the plug-in tube facing the sleeve tube, and a clamping block cooperating with the bayonet is provided inside the sleeve tube.

[0007] Preferably, the wrench comprises a gripping plate, a convex plate hinged to the lug, and a hinged plate located in the middle of the gripping plate, the hinged plate being located between the gripping plate and the sleeve, a rotating shaft being arranged on the hinged plate, and one end of the pull rod being arranged on the rotating shaft.

[0008] Preferably, a threaded hole is provided on the rotating shaft, and the pull rod is rotatably assembled in the threaded hole.

[0009] Preferably, a detachable plug is provided at one end of the threaded hole away from the rotating shaft, and the plug is abutted against the pull rod.

[0010] Preferably, a pair of hinged plates are provided, the plug is made of elastic material and is located between the hinged plates, and a protrusion is provided on one side of the two hinged plates facing each other and close to the sleeve portion; When the pull rod is rotated until the locking rod is disengaged from the locking groove, the plug is squeezed and fixed between the protrusions.

[0011] Preferably, at least two locking blocks are circumferentially spaced apart on the outer side of the plug-in tube, and the sleeve tube is provided with locking portions, the number of which is the same as the number of the locking blocks.

[0012] Preferably, the locking block comprises a pair of locking blocks, and the pull rod is located between the locking blocks.

[0013] Preferably, the locking block is provided with a chamfer for the locking rod to smoothly enter and exit the locking groove.

[0014] Preferably, a retaining ring is coaxially arranged on the outer side of the plug-in tube, and an elastic ring is extruded and arranged between the retaining ring and the sleeve tube.

[0015] The beneficial effects of the present invention are: 1. The first arm and the second arm can be connected and disassembled by turning a wrench; 2. The axis of the pull rod is located on the side of the rotation axis of the gripping plate close to the sleeve. The vibration of the drone during operation will make the force direction of the gripping plate always toward the sleeve, thus ensuring the connection stability of the arm; 3. The threaded connection of the pull rod and the coordination between the plug and the protrusion make it easy to adjust the coordination between the locking rod and the locking block and to more easily control the disassembly and assembly of the machine arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure when the machine arm is connected.

[0018] Figure 2 Schematic diagram of the key nodes in the arm disassembly process.

[0019] Figure 3 This is a schematic diagram of the complete disassembly of the arm nodes.

[0020] Figure 4 This is a schematic diagram of the first machine arm structure.

[0021] Figure 5 This is a schematic diagram of the second machine arm structure.

[0022] Figure 6 It is a schematic diagram of the locking structure.

[0023] Explanation of the reference numerals in the accompanying drawings: 01, first machine arm; 2, plug-in tube; 21, bayonet; 3, lock seat; 31, lock block; 32, lock groove; 33, chamfer; 34, retaining ring; 4, connecting tube 1; 05, second machine arm; 6, sleeve tube; 61, clamping block; 62, annular channel; 63, elastic ring; 7, locking part; 71, lug; 72, wrench; 721, convex plate; 722, hinged plate; 723, protrusion; 73, lock rod assembly; 731, rotating shaft; 732, pull rod; 733, locking rod; 8, plug. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-3 As shown, the present invention provides a multi-axis UAV arm connection structure, including a first arm 01 and a second arm 05 that can be quickly disassembled and assembled, and the first arm 01 or the second arm 05 is fixedly connected to the UAV body. In this embodiment, the second arm 05 with a more complex structure than the first arm 01 is fixedly connected to the UAV body, thereby facilitating the disassembly and installation of the arms.

[0026] Further integration Figure 4-6 As shown, the first arm 01 includes a coaxial plug-in tube 2 and a connecting tube 4, a retaining ring 34 is coaxially fixed on the outer side of the plug-in tube 2, a locking seat portion 3 is symmetrically arranged on the outer side of the retaining ring 34, the locking seat portion 3 includes a pair of locking blocks 31, a locking groove 32 is arranged on the side of the locking block 31 facing the connecting tube 4, and a chamfer 33 is arranged on the locking block 31 and at the boundary of the locking groove 32, the locking seat portion 3 is used to cooperate with the snap-locking portion 7 arranged on the second arm 05 to realize the rapid disassembly and assembly connection between the two.

[0027] Specifically, the second machine arm 05 includes a sleeve tube 6 and locking portions 7 which are arranged at equal intervals on the outside of the sleeve tube 6 in the circumferential direction. The number of the locking parts 7 and the lock base parts 3 is the same and they correspond one to one. The locking parts 7 include a pair of lugs 71, a wrench 72 and a locking rod group 73. There is a space reserved between the lugs 71. The wrench 72 includes a long strip-shaped holding plate, and a pair of convex plates 721 rotatably connected to the lugs 71 are extended at one end of the holding plate. A pair of hinged plates 722 are also extended on the holding plate. The hinged plates 722 are located between the holding plate and the sleeve 6. A rotating shaft 731 in the locking rod group 73 is rotatably inserted between the hinged plates 722. In addition, the locking rod group 73 also includes a pull rod 732 perpendicular to the axis of the rotating shaft 731. The pull rod 732 is provided with an external thread, and a threaded hole is opened on the rotating shaft 731. One end of the pull rod 732 is threadedly rotatably fixed on the rotating shaft 731, and a vertical locking rod 733 is fixed at the other end of the pull rod 732. After the plug-in tube 2 is inserted into the sleeve 6, the pull rod 732 is driven away from the locking block 31, and the wrench 72 is rotated to move the locking rod 733 toward the plug-in tube 2. After the locking rod 733 passes over the locking block 31, the pull rod 732 is rotated again to move toward the locking block 31, and the wrench 72 is rotated at the same time until the locking rod 733 is engaged in the locking groove 32, thereby realizing the fixed assembly of the first arm 01 and the second arm 05. The above steps can be reversed to realize the disassembly of the first arm 01 and the second arm 05.

[0028] Due to the errors in actual processing and installation, the above-mentioned threaded rod 732 is used, and the position of the locking rod 733 is adjusted by rotating the rod 732, so as to ensure that the locking rod 733 can abut against the locking block 31. In addition, a detachable plug 8 is installed in the threaded hole of the rotating shaft 731. The plug 8 is made of rubber material or other elastic material. One end of the plug 8 abuts against the rod 732, and the other end extends out of the threaded hole. A protrusion 723 is provided on the opposite side of the two hinged plates 722 and close to the end of the sleeve 6; After adjusting the positions of the pull rod 732 and the locking rod 733, the plug 8 is inserted into the threaded hole to limit the rotation of the pull rod 732, so that the locking rod 733 and the locking groove 32 can be stably matched each time the first arm 01 and the second arm 05 are disassembled. In addition, when the first arm 01 and the second arm 05 are disassembled, the wrench 72 is turned to make the locking rod 733 disengage from the locking groove 32, and the pull rod 732 rotates, during which the plug 8 gradually enters between the protrusions 723, and the friction between the plug 8 and the protrusions 723 limits the free rotation of the pull rod 732, thereby facilitating the disassembly and assembly of the locking rod 733.

[0029] In the above description, when the first arm 01 and the second arm 05 are fixed, the center line of the pull rod 732 is located on the side of the rotation axis of the holding plate close to the sleeve tube 6. During the actual flight of the UAV, the first arm 01 and the second arm 05 need to bear the vibration generated by the flight power. The plug-in tube 2 and the sleeve tube 6 cooperate to limit the relative sliding between the first arm 01 and the second arm 05 along their axial direction. All the force is borne by the pull rod 732, and the pull rod 732 will always make the wrench 72 move close to the sleeve tube 6, that is, the first arm 01 and the second arm 05 are absolutely stably connected.

[0030] In addition to the above-mentioned key technical structures, one or more bayonet holes 21 are provided at the end of the plug-in tube 2, and a card block 61 with the same number and one-to-one correspondence to the bayonet holes 21 is extended on the inner side of the sleeve tube 6. When the plug-in tube 2 enters the sleeve tube 6, the card block 61 is embedded in the bayonet hole 21. When the structure is applied to the drone, plugs and sockets for transmitting signals, electric energy, etc. need to be respectively provided in the first arm 01 and the second arm 05. The cooperation between the card block 61 and the bayonet hole 21 effectively avoids relative rotation between the first arm 01 and the second arm 05, thereby protecting the stable connection between the plug and the socket.

[0031] An annular channel 62 is coaxially arranged on the outer side of the sleeve tube 6 facing the plug tube 2, and the annular channel 62 is aligned with the end surface of the retaining ring, and an elastic ring 63 is embedded in the annular channel 62; when the first machine arm 01 and the second machine arm 05 are fixedly connected, the elastic ring 63 is squeezed and deformed by the retaining ring, that is, a very small range of relative mobility is formed between the first machine arm 01 and the second machine arm 05, and at the same time, the locking rod 733 and the locking block 31 are always kept in a squeezed state, further improving the connection stability of the first machine arm 01 and the second machine arm 05. In addition to improving the stability of the machine arm connection, the elastic ring 63 can also reduce the manufacturing and installation accuracy requirements for other components.

[0032] The working principle of the present invention is: When the first arm 01 and the second arm 05 are applied to a drone, one end of the second arm 05 is fixed to the drone casing, and the second arm 05 is fixedly connected to a flight power device; During the process, the first machine arm 01 and the second machine arm 05 can be disassembled and assembled, so as to facilitate the transportation and use of the UAV. When the first machine arm 01 and the second machine arm 05 are fixed, the center line of the pull rod 732 is located on the side of the rotation axis of the holding plate close to the sleeve pipe 6. During the actual flight of the UAV, the first machine arm 01 and the second machine arm 05 need to bear the vibration generated by the flight power. The plug-in pipe 2 and the sleeve pipe 6 cooperate to limit the relative sliding between the first machine arm 01 and the second machine arm 05 along the axis direction. All the forces are borne by the pull rod 732, and the pull rod 732 will always make the wrench 72 move close to the sleeve pipe 6, that is, the first machine arm 01 and the second machine arm 05 are absolutely stably connected.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-axis drone arm connection structure, characterized in that: It comprises a first machine arm (01) and a second machine arm (05); The first machine arm (01) comprises a plug-in pipe (2), a lock seat portion (3) and a connecting pipe 1 (4) which are arranged in sequence; The second machine arm (05) comprises a sleeve tube (6) and a locking portion (7) that is detachably matched with the locking seat portion (3); The locking seat portion (3) comprises a locking block (31) and a locking slot (32), wherein the locking slot (32) is arranged on a side of the locking block (31) facing away from the second machine arm (05); The locking portion (7) comprises a lug (71) fixed to the outside of the sleeve tube (6), a wrench (72) hinged to the lug (71), and a locking rod assembly (73) arranged on the wrench (72); The locking rod assembly (73) comprises a pull rod (732) with one end rotatably disposed on the wrench (72) and a locking rod (733) engaged with the locking groove (32); When the plug-in tube (2) is embedded in the sleeve tube (6) and the locking rod (733) is engaged in the locking groove (32), the axis of the pull rod (732) is located on the side of the rotation axis of the wrench (72) close to the sleeve tube (6).

2. A multi-axis drone arm connection structure as claimed in claim 1, characterized in that: A bayonet (21) is provided at one end of the plug-in tube (2) facing the sleeve tube (6), and a clamping block (61) cooperating with the bayonet (21) is provided inside the sleeve tube (6).

3. A multi-axis drone arm connection structure as claimed in claim 1, characterized in that: The wrench (72) comprises a gripping plate, a convex plate (721) hinged to the lug (71), and a hinged plate (722) located in the middle of the gripping plate, the hinged plate (722) being located between the gripping plate and the sleeve tube (6), a rotating shaft (731) being arranged on the hinged plate (722), and one end of the pull rod (732) being arranged on the rotating shaft (731).

4. A multi-axis drone arm connection structure as claimed in claim 3, characterized in that: The rotating shaft (731) is provided with a threaded hole, and the pull rod (732) is rotatably assembled in the threaded hole.

5. A multi-axis drone arm connection structure as claimed in claim 4, characterized in that: A detachable plug (8) is provided at one end of the threaded hole away from the rotating shaft (731), and the plug (8) is in abutment with the pull rod (732).

6. A multi-axis drone arm connection structure as claimed in claim 5, characterized in that: A pair of hinged plates (722) are provided, the plug (8) is made of elastic material and is located between the hinged plates (722), and a protrusion (723) is provided on one side of the two hinged plates (722) facing each other and close to the sleeve portion; When the pull rod (732) is rotated until the locking rod (733) is disengaged from the locking groove (32), the plug (8) is squeezed and fixed between the protrusions (723).

7. The multi-axis drone arm connection structure according to claim 1, characterized in that: At least two locking seat portions (3) are arranged at intervals in the circumferential direction on the outer side of the plug-in tube (2), and the sleeve tube (6) is provided with the same number of snap lock portions (7) as the locking seat portions (3).

8. A multi-axis drone arm connection structure as claimed in claim 7, characterized in that: The locking seat portion (3) comprises a pair of locking blocks (31), and the pull rod (732) is located between the locking blocks (31).

9. The multi-axis drone arm connection structure according to claim 1, characterized in that: The locking block (31) is provided with a chamfer (33) for the locking rod (733) to smoothly enter and exit the locking groove (32).

10. The multi-axis drone arm connection structure according to claim 1, characterized in that: A retaining ring is coaxially arranged on the outside of the plug-in tube (2), and an elastic ring (63) is extruded and arranged between the retaining ring and the sleeve tube (6).

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