Multi-rotor unmanned aerial vehicle arm connecting structure

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to a multi-rotor unmanned aerial vehicle arm connecting structure, which comprises a base pipe, a connecting rod, a connecting rod and a connecting rod, the base pipe is of a straight pipe structure and is fixedly connected with the side part of a vehicle body of an unmanned aerial vehicle through a section, and a lock pin is fixedly arranged on the outer side wall of the base pipe; one end of the folding arm is movably embedded in the base pipe, and a locking ring is arranged at the position, corresponding to the end portion of the base pipe, of the outer portion of the folding arm in the circumferential direction; the locking sleeve is movably arranged outside the folding arm in a sleeving mode, a J-shaped locking channel matched with the locking nail is arranged at the end, corresponding to the base pipe, of the locking sleeve, and a check ring is arranged at the end, corresponding to the locking ring and far away from the base pipe, of the inner side wall of the locking sleeve; the outer side wall of the locking sleeve is provided with anti-skid lines. The folding arm is simple and reliable in design, the folding arm cannot shake due to part gaps after assembly, and the stability of the unmanned aerial vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to an arm connection structure of a multi-rotor unmanned aerial vehicle. Background Art

[0002] Due to its own high load-carrying performance, the arm length of a large-load multi-rotor unmanned aerial vehicle is usually long. Therefore, when the unmanned aerial vehicle works, the unfolded arms occupy a large space, and if the arms are not disassembled during storage, it is not convenient for transportation and storage.

[0003] However, the existing detachable arm structure is often fixed to the fuselage through bolts, and the disassembly of the arm structure needs to be carried out with the help of external tools, which is too cumbersome. Moreover, there is a gap in the connection between the arm and the fuselage due to the problem of ineliminable machining accuracy, making the operation of the unmanned aerial vehicle unreliable. Therefore, an arm connection structure of a multi-rotor unmanned aerial vehicle is proposed to overcome the above-mentioned problems. Summary of the Utility Model

[0004] The utility model provides an arm connection structure of a multi-rotor unmanned aerial vehicle, which is simple and reliable in design and will not cause the folding arm to shake due to component gaps after assembly, and improves the stability of the unmanned aerial vehicle.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions: an arm connection structure of a multi-rotor unmanned aerial vehicle, which includes: a base tube, the base tube is a straight tube structure and is fixedly connected to the side part of the fuselage of the unmanned aerial vehicle through a section, and a locking nail is fixedly arranged on the outer side wall of the base tube; a folding arm, one end of the folding arm is movably embedded in the base tube, and a locking ring is arranged circumferentially around the end of the base tube corresponding to the folding arm; a locking sleeve, the locking sleeve is movably sleeved on the outside of the folding arm, and a J-shaped locking groove matched with the locking nail is arranged at one end of the locking sleeve corresponding to the base tube, and a retaining ring is arranged on the inner side wall of the locking sleeve corresponding to the end of the locking ring far from the base tube; an anti-slip pattern is arranged on the outer side wall of the locking sleeve.

[0006] Preferably, a hinge rod is slidably fitted in the base tube, the folding arm is hinged with the hinge rod, and a slot is arranged along the length direction of the hinge rod, and the locking nail penetrates through the outer wall of the base tube and is matched with the slot.

[0007] Preferably, an elastic rubber sleeve is sleeved on the outside of the folding arm between the locking ring and the retaining ring.

[0008] Preferably, a limiting rubber ring is sleeved on the folding arm corresponding to the end of the locking sleeve far from the base tube.

[0009] Preferably, an inner chamfer is arranged at the free end of the base tube, and an outer chamfer is arranged at one end of the locking ring corresponding to the base tube.

[0010] Preferably, a positioning groove is provided on the inner chamfer surface, and a positioning protrusion is provided on the outer chamfer corresponding to the positioning groove.

[0011] The beneficial effects of the present utility model are as follows: This design is simple and reliable, and after assembly, the folding arm will not shake due to component gaps, improving the stability of the drone. The hinge rod is used to limit the axial movement stroke of the folding arm and the erected angle after folding. In addition, the locking pin is a screw structure, so the constraint on the hinge rod can be released by disassembling the locking pin, thus realizing the quick replacement of the folding arm. The function of the limiting rubber ring is that when the folding arm is in the unlocked and folded state, the locking sleeve can be effectively circumferentially constrained through the limiting rubber ring, thus avoiding excessive movement of the locking sleeve and generating large noise during transportation and handling. At the same time, by limiting the movement range of the locking sleeve, the locking efficiency of the folding arm is improved. Through the cooperation of the inner chamfer and the outer chamfer, the coaxial positioning accuracy between the folding arm and the base tube is improved. At the same time, using the conical surface principle, the fitting gap is eliminated under the action of the elastic rubber sleeve, ensuring the stability of the folding arm. When the folding arm is combined and locked with the base tube, the positioning protrusion aligns with the positioning groove, further restricting the self-angle of the folding arm and ensuring that the rotor shaft at the end of the folding arm is perpendicular to the ground. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 Schematic diagram of the locking state of the folding arm of the present utility model;

[0014] Figure 2 Schematic diagram of the upward folding state of the folding arm of the present utility model;

[0015] Figure 3 Schematic diagram of the external structure of the locking sleeve of the present utility model.

[0016] In the figure: 1. Base tube; 2. Locking pin; 3. Folding arm; 4. Lock ring; 5. Locking sleeve; 6. J-shaped locking track; 7. Retaining ring; 8. Anti-slip pattern; 9. Hinge rod; 10. Groove; 11. Elastic rubber sleeve; 12. Limiting rubber ring; 13. Inner chamfer; 14. Outer chamfer; 15. Positioning protrusion; 16. Positioning groove. Detailed Embodiments

[0017] Next, in conjunction with the drawings of the present utility model, the technical solutions of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0018] According to Figure 1 , Figure 2 , Figure 3 As shown, the arm connection structure of a multi-rotor unmanned aerial vehicle includes: a base tube 1, the base tube 1 is a straight tube structure and is fixedly connected to the side part of the fuselage of the unmanned aerial vehicle through a section, and a locking nail 2 is fixedly arranged on the outer side wall of the base tube 1; a folding arm 3, one end of the folding arm 3 is movably embedded in the base tube 1, and a locking ring 4 is arranged circumferentially around the end of the base tube 1 corresponding to the outside of the folding arm 3; a locking sleeve 5, the locking sleeve 5 is movably sleeved outside the folding arm 3, and a J-shaped locking groove 6 for cooperating with the locking nail 2 is arranged at one end of the locking sleeve 5 corresponding to the base tube 1, and a retaining ring 7 is arranged on the inner side wall of the locking sleeve 5 corresponding to the end of the locking ring 4 away from the base tube 1; an anti-slip pattern 8 is arranged on the outer side wall of the locking sleeve 5.

[0019] Through the above settings, the folding arm 3 can be telescoped in the base tube 1 and fastened by the locking sleeve 5. The locking sleeve 5 is similar to a coaxial cable adapter, and it realizes the tension locking effect through the cooperation of the J-shaped locking groove 6 inside and the locking nail 2. When the locking sleeve 5 is in the locked state, the locking sleeve 5 firmly pushes the locking ring 4 towards the end of the base tube 1 through the retaining ring 7, thereby completing the fixing function. When unlocking by rotating the locking sleeve 5 along the direction of the J-shaped locking groove 6, the folding arm 3 can be separated from the base tube 1, so as to meet the storage purpose of the unmanned aerial vehicle. This design is simple and reliable and will not cause the folding arm 3 to shake due to component gaps after assembly, and improves the stability of the unmanned aerial vehicle.

[0020] An articulated rod 9 is slidably fitted in the base tube 1, the folding arm 3 is hinged to the articulated rod 9, and a slot 10 is arranged along the length direction of the articulated rod 9, and the locking nail 2 penetrates through the outer wall of the base tube 1 and cooperates with the slot 10.

[0021] In this setting, the articulated rod 9 is used to limit the axial movement stroke of the folding arm 3 and the vertical angle after folding. In addition, the locking nail is a screw structure, so the constraint on the articulated rod 9 can be released by removing the locking nail 2, thereby realizing the quick replacement of the folding arm 3.

[0022] A limiting rubber ring 12 is sleeved on the folding arm 3 corresponding to the end of the locking sleeve 5 away from the base pipe 1. The function of the limiting rubber ring 12 is that when the folding arm 3 is in the unlocked folding state, the locking sleeve 5 can be effectively circumferentially constrained through the limiting rubber ring 12, so as to avoid excessive movement of the locking sleeve 5 and generate greater noise during transportation and handling. At the same time, by limiting the movement range of the locking sleeve 5, the locking efficiency of the folding arm 3 is improved.

[0023] An elastic rubber sleeve 11 is sleeved between the lock ring 4 and the retaining ring 7 on the outside of the folding arm 3. The free end of the base pipe 1 is provided with an inner chamfer 13, and the end of the lock ring 4 corresponding to the base pipe 1 is provided with an outer chamfer 14. In this setting, through the cooperation of the inner chamfer 13 and the outer chamfer 14, the coaxial positioning accuracy of the folding arm 3 and the base pipe 1 is improved. At the same time, using the conical surface principle, the fitting clearance is eliminated under the action of the elastic rubber sleeve 11 to ensure the stability of the folding arm 3.

[0024] A positioning groove 16 is provided on the surface of the inner chamfer 13, and a positioning protrusion 15 corresponding to the positioning groove 16 is provided on the outer chamfer 14. Through this setting, when the folding arm 3 and the base pipe 1 are combined and locked, the positioning protrusion 15 and the positioning groove 16 are aligned, thereby further restricting the self-angle of the folding arm 3 and ensuring that the rotor shaft at the end of the folding arm 3 is perpendicular to the ground.

[0025] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A connecting structure for the arms of a multi-rotor drone, characterized in that , including: A base tube (1), the base tube (1) being a straight tube structure and fixedly connected to the side of the fuselage of the drone through a section, and locking pins (2) being fixedly provided on the outer side wall of the base tube (1); A folding arm (3), one end of the folding arm (3) being movably embedded inside the base tube (1), and a locking ring (4) being circumferentially provided on the outside of the folding arm (3) corresponding to the end of the base tube (1); A locking sleeve (5), the locking sleeve (5) being movably sleeved outside the folding arm (3), and a J-shaped locking track (6) cooperating with the locking pin (2) being provided at one end of the locking sleeve (5) corresponding to the base tube (1), and a retaining ring (7) being provided on the inner side wall of the locking sleeve (5) corresponding to the end of the locking ring (4) away from the base tube (1); Anti-slip threads (8) are provided on the outer side wall of the locking sleeve (5).

2. The multi-rotor UAV arm connection structure according to claim 1, wherein: An articulated rod (9) is slidably fitted inside the base tube (1), the folding arm (3) is hinged to the articulated rod (9), and a slot (10) is provided along the length direction of the articulated rod (9), and the locking pin (2) penetrates through the outer wall of the base tube (1) and cooperates with the slot (10).

3. The multi-rotor UAV arm connection structure according to claim 1, wherein: An elastic rubber sleeve (11) is sleeved outside the folding arm (3) between the locking ring (4) and the retaining ring (7).

4. The multi-rotor UAV arm connection structure according to claim 1, characterized in that: A limiting rubber ring (12) is sleeved on the folding arm (3) corresponding to the end of the locking sleeve (5) away from the base tube (1).

5. The multi-rotor UAV arm connection structure according to claim 1, characterized in that: An inner chamfer (13) is provided at the free end of the base tube (1), and an outer chamfer (14) is provided at one end of the locking ring (4) corresponding to the base tube (1).

6. The multi-rotor UAV arm connection structure according to claim 5, characterized in that: A positioning groove (16) is provided on the surface of the inner chamfer (13), and a positioning protrusion (15) is provided on the outer chamfer (14) corresponding to the positioning groove (16).

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