Anti-loosening unmanned aerial vehicle arm connecting piece

Abstract

The utility model discloses an anti-loosening unmanned aerial vehicle arm connecting piece which comprises a front arm and a rear arm. A boss extending outwards in the radial direction of the front arm is arranged at the end, facing the rear arm, of the front arm, and the locknut penetrates through the front arm to be in screwing fit with the rear arm. A step extending inwards in the radial direction is arranged at the end, away from the rear arm, of the lock nut, so that when the lock nut is screwed to the rear arm in a matched mode, the step abuts against the boss. A limiting groove penetrating in the thickness direction is formed in the end, facing the rear arm, of the locknut and penetrates through one side, in the length direction, of the locknut, the limiting groove is integrally arranged in a right triangle shape, and the limiting assembly comprises a groove obliquely formed in the bevel edge direction of the right triangle and a limiting rod arranged in the groove; a stop block formed along the protrusion is arranged on the limiting rod, and a spring is arranged between the stop block and the bottom of the groove in a sleeved mode, so that the limiting rod is clamped in the limiting groove when the spring does not generate elastic deformation. The utility model has the advantages of reasonable structural design, simplicity in operation, stronger stress and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to an anti-loosening connecting piece for an arm of an unmanned aerial vehicle. Background Art

[0002] Unmanned aerial vehicles, or UAVs for short, are a new concept of aircraft that is in rapid development. They have the advantages of being flexible, responsive, unmanned, and having low operating requirements. However, in some specific practical applications, such as agriculture and disaster prevention and mitigation, larger drones take up a lot of space during transportation and are inconvenient to carry. It is usually necessary to disassemble the arms to reduce the packing size of the drone. The detachable arm solution adopted in the prior art usually only fixes the arms through the tightening force of the threads or buckles. Since drones have the characteristics of long-term operation, the method of fixing the arms only through the tightening force of the threads or buckles cannot effectively cope with the long-term vibration caused by the long-term operation of drones. The arms of drones often become loose or detached from the fuselage due to long-term vibration. In order to solve the above technical problems, a Chinese patent document discloses a fixing device for a drone arm and a drone, and the application publication number is CN 114537637A. The patent realizes fixation by clamping a limit piece arranged on the top of the connecting piece in the limit groove of the arm assembly. However, this lateral fixing method relies only on the rigidity of the limit piece to achieve fixation, and the force that can be withstood is relatively small. Moreover, whether disassembling or installing the arm, it is necessary to contact the limit state to realize the rotation fixation and disassembly of the nut, which is inconvenient to operate. Therefore, the utility model proposes a drone arm connecting piece that is simple to operate and can better achieve anti-loosening. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an anti-loosening UAV arm connector with reasonable structural design, simple operation and stronger force bearing capacity.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] An anti-loosening drone arm connecting piece comprises a forearm and a rear arm; the forearm has a boss extending radially outwardly from the forearm on one end facing the rear arm, the forearm is provided with a locking nut, the locking nut passes through the forearm and is screwed together with the rear arm; the locking nut has a step extending radially inwardly from one end facing away from the rear arm, so that when the locking nut is screwed together with the rear arm, the step abuts against the boss;

[0006] The anti-loosening nut has a limit groove arranged along the thickness direction on one end facing the rear arm, and passes through one side of the anti-loosening nut in the length direction. The limit grooves are evenly distributed along the circumference of the anti-loosening nut. The limit grooves are arranged in a right triangle as a whole, and the hypotenuse of the right triangle is arranged toward the tightening direction of the anti-loosening nut. A limit assembly is arranged on the rear arm, and the limit assembly includes a groove obliquely arranged along the hypotenuse direction of the right triangle and a limit rod arranged in the groove. The groove passes through the rear arm upward, and the limit rod has a stopper formed along the protrusion. A spring is sleeved between the stopper and the bottom of the groove, so that the limit rod is clamped in the limit groove when the spring does not undergo elastic deformation.

[0007] With the above structure, when installing the drone arm, the anti-loosening nut is tightened along the tightening direction of the anti-loosening nut. Since the limiting groove is arranged in a right-angled triangle as a whole, the direction of the hypotenuse of the right-angled triangle is consistent with the tightening direction of the anti-loosening nut, and the inclination direction of the limiting rod is also consistent with the inclination direction of the hypotenuse, there is no need to manually push the limiting rod out of the limiting groove when tightening. The limiting rod will return to the groove under the action of force. At this time, the spring is in a compressed state. When encountering the next limiting groove, the limiting rod will reset under the elastic force of the spring and abut against the right-angled side of the limiting groove; the convenience of operation is further improved, so that it can be fixed more stably. If the machine arm is to be disassembled, it can only be disassembled by pushing the limiting rod out of the limiting groove; and the inclined limiting rod, when preventing the anti-loosening nut from loosening, is analyzed from a mechanical point of view, it is no longer just relying on the rigidity of the limiting rod itself, but more on decomposing the force in the loosening direction of the anti-loosening nut to be smaller, so that it can withstand greater force, further improving the anti-vibration ability of the drone.

[0008] Furthermore, a limiting block is arranged on the side of the groove facing the limiting groove, the gap formed between the limiting block and the groove matches the diameter of the limiting rod and the gap formed between the limiting block and the groove is smaller than the diameter of the block, and the side of the groove facing away from the limiting groove has a through-formed clearance hole, so that when the spring is inelastically deformed, one end of the limiting rod is inserted into the clearance hole, and the depth of the clearance hole matches the maximum deformation length of the spring.

[0009] In this way, the limit rod can be prevented from being displaced in the vertical direction, and the stability of the limit rod clamping can be further improved.

[0010] Furthermore, the stopper extends upward along the depth direction of the groove to form a sliding handle.

[0011] In this way, it is convenient for the staff to return the limit rod to the groove during disassembly.

[0012] Furthermore, the forearm has a connecting arm extending on one side toward the rear arm, and the connecting arm is prismatic as a whole. The rear arm has a corresponding slot on one side toward the forearm, and the connecting arm is inserted into the slot. The length of the connecting arm is consistent with the depth of the slot, so that the boss abuts against the rear arm.

[0013] In this way, relative rotation between the front arm and the rear arm can be prevented, wear of the machine arm can be avoided, and the service life can be extended.

[0014] Furthermore, a protruding indicating arrow is provided on the circumference of the anti-loosening nut, and the indicating arrow is consistent with the tightening direction of the anti-loosening nut.

[0015] This makes it easier to find the direction of rotation during installation and removal.

[0016] Furthermore, the inclination angle of the hypotenuse of the limiting groove is 45 degrees to 60 degrees.

[0017] In summary, the utility model has the advantages of reasonable structural design, simple operation, stronger force bearing, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure after the anti-loosening nut is hidden.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the anti-loosening nut.

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the forearm.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model.

[0023] Reference numerals:

[0024] 1. Forearm, 11. Boss, 12. Connecting arm, 2. Rear arm, 3. Anti-loosening nut, 31. Limiting groove, 32. Indicator arrow, 4. Limiting assembly, 41. Groove, 42. Limiting rod, 43. Spring, 44. Limiting block, 45. Sliding handle, DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the embodiments.

[0026] A loose-proof drone arm connector, such as Figure 1 to Figure 5As shown, it comprises a front arm 1 and a rear arm 2; the front arm 1 has a boss 11 extending radially outwardly from the front arm 1 on one end thereof facing the rear arm 2, the front arm 1 is provided with a lock nut 3, the lock nut 3 passes through the front arm 1 and is screwed together with the rear arm 2; the lock nut 3 has a step extending radially inwardly from one end thereof away from the rear arm 2, so that when the lock nut 3 is screwed together with the rear arm 2, the step abuts against the boss 11;

[0027] The locking nut 3 has a limiting groove 31 which is arranged along the thickness direction and passes through one side of the length direction of the locking nut 3. The limiting groove 31 is evenly arranged along the circumference of the locking nut 3. The limiting groove 31 is arranged in a right triangle as a whole, and the hypotenuse of the right triangle is arranged toward the tightening direction of the locking nut 3. The rear arm 2 is provided with a limiting assembly 4, which includes a groove 41 which is arranged obliquely along the hypotenuse of the right triangle and a limiting rod 42 arranged in the groove 41. The groove passes through the rear arm 2 upward. The limiting rod 42 has a stopper formed along the protrusion. A spring 43 is sleeved between the stopper and the bottom of the groove, so that the limiting rod 42 is clamped in the limiting groove 31 when the spring 43 does not undergo elastic deformation. During implementation, the inclination angle of the hypotenuse of the limiting groove is 45 degrees to 60 degrees.

[0028] In this way, when installing the drone arm, tighten it along the tightening direction of the anti-loosening nut. Since the limiting groove is arranged in a right-angled triangle as a whole, the direction of the hypotenuse of the right-angled triangle is consistent with the tightening direction of the anti-loosening nut, and the inclination direction of the limiting rod is also consistent with the inclination direction of the hypotenuse, there is no need to manually push the limiting rod out of the limiting groove when tightening. The limiting rod will return to the groove under the action of force. At this time, the spring is in a compressed state. When encountering the next limiting groove, the limiting rod will reset under the elastic force of the spring and abut against the right-angled side of the limiting groove; the convenience of operation is further improved, so that it can be fixed more stably. If the machine arm is to be disassembled, it can only be considered that the limiting rod is pushed out of the limiting groove by fluctuations; and the inclined limiting rod, when preventing the anti-loosening nut from loosening, is analyzed from a mechanical point of view no longer just relying on the rigidity of the limiting rod itself, but more on decomposing the force in the loosening direction of the anti-loosening nut to be smaller, so that it can withstand greater force, further improving the anti-vibration ability of the drone.

[0029] During implementation, in order to prevent the limit rod from being displaced vertically and further improve the stability of the limit rod clamping, such as Figure 1 and Figure 2As shown, a limiting block 44 is arranged on the side of the groove 41 facing the limiting groove 31, the gap formed between the limiting block 44 and the groove 41 matches the diameter of the limiting rod 42 and the gap formed between the limiting block 44 and the groove 41 is smaller than the diameter of the block, and a clearance hole is formed through the side of the groove away from the limiting groove 31, so that one end of the limiting rod 42 is inserted into the clearance hole when the spring is not elastically deformed, and the depth of the clearance hole matches the maximum deformation length of the spring. The block extends upward along the depth direction of the groove 41 to form a sliding handle 45.

[0030] like Figure 4 As shown, in order to reduce the relative rotation between the forearm and the rear arm and reduce wear, the forearm 1 has a connecting arm 12 extending on the side facing the rear arm 2, and the connecting arm 12 is prismatic as a whole. The rear arm 2 has a corresponding slot on the side facing the forearm 1, and the connecting arm 12 is inserted into the slot. The length of the connecting arm 12 is consistent with the depth of the slot, so that the boss 11 abuts against the rear arm 2.

[0031] like Figure 3 As shown, a protruding indicating arrow 32 is provided on the circumference of the locking nut 3 , and the indicating arrow 32 is consistent with the tightening direction of the locking nut 3 .

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-loosening drone arm connector, comprising a front arm (1) and a rear arm (2); characterized in that: The front arm (1) has a boss (11) extending radially outwardly from the front arm (1) on one end thereof facing the rear arm (2); the front arm (1) is provided with a lock nut (3) which passes through the front arm (1) and is screwed together with the rear arm (2); the lock nut (3) has a step extending radially inwardly on one end thereof facing away from the rear arm (2), so that when the lock nut (3) is screwed together with the rear arm (2), the step abuts against the boss (11); The locking nut (3) has a limiting groove (31) extending through the end thereof facing the rear arm (2) in the thickness direction and extending through one side of the locking nut (3) in the length direction. The limiting grooves (31) are evenly distributed along the circumference of the locking nut (3). The limiting grooves (31) are arranged in a right triangle as a whole, and the hypotenuse of the right triangle is arranged toward the tightening direction of the locking nut (3). A limiting assembly (4) is arranged on the rear arm (2). The limiting assembly (4) comprises a groove (41) obliquely arranged along the hypotenuse of the right triangle and a limiting rod (42) arranged in the groove (41). The groove extends through the rear arm (2) upward. The limiting rod (42) has a stopper formed along a protrusion. A spring (43) is sleeved between the stopper and the bottom of the groove, so that the limiting rod (42) is clamped in the limiting groove (31) when the spring (43) does not undergo elastic deformation.

2. The anti-loosening drone arm connector according to claim 1, characterized in that: A limiting block (44) is arranged on a side of the groove (41) facing the limiting groove (31); a gap formed between the limiting block (44) and the groove (41) matches the diameter of the limiting rod (42); and a gap formed between the limiting block (44) and the groove (41) is smaller than the diameter of the block; a side of the groove facing away from the limiting groove (31) has a clearance hole formed therethrough, so that one end of the limiting rod (42) is inserted into the clearance hole when the spring is inelastically deformed; and a depth of the clearance hole matches the maximum deformation length of the spring.

3. The anti-loosening drone arm connector according to claim 2, characterized in that: The stopper extends upward along the depth direction of the groove (41) to form a sliding handle (45).

4. The anti-loosening drone arm connector according to claim 1, characterized in that: The front arm (1) has a connecting arm (12) extending on one side of the rear arm (2), and the connecting arm (12) is prism-shaped as a whole. The rear arm (2) has a corresponding slot on one side of the front arm (1), and the connecting arm (12) is inserted into the slot. The length of the connecting arm (12) is consistent with the depth of the slot, so that the boss (11) abuts against the rear arm (2).

5. The anti-loosening drone arm connector according to claim 1, characterized in that: A protruding indicating arrow (32) is provided on the circumference of the locking nut (3), and the indicating arrow (32) is consistent with the tightening direction of the locking nut (3).

6. The anti-loosening drone arm connector according to claim 1, characterized in that: The inclined angle of the hypotenuse of the limiting groove is 45 degrees to 60 degrees.

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