CN112249304A

CN112249304A - Lockable folding paddle and unmanned aerial vehicle

Info

Publication number: CN112249304A
Application number: CN202011165390.XA
Authority: CN
Inventors: 吴奇才; 吴敏
Original assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Current assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-22

Abstract

The invention discloses a lockable folding paddle, which comprises a paddle and a paddle clamp, wherein the paddle is rotationally arranged on the paddle clamp and can be unfolded or folded relative to the paddle clamp; the blade clamp further comprises a locking bolt assembly, and the locking bolt assembly is used for limiting the relative rotation of the blade relative to the blade clamp after the blade is unfolded relative to the blade clamp. The invention can reduce the abrasion between the paddle and the paddle clamp, prolong the service life of the folding paddle and reduce the resonance problem caused by large-size polymer paddles.

Description

Lockable folding paddle and unmanned aerial vehicle

Technical Field

The invention relates to the technical field of unmanned aerial vehicles, in particular to a lockable folding paddle and an unmanned aerial vehicle.

Background

The rotor wing on the unmanned aerial vehicle provides power for the aircraft and is a key element of the power part. The folding paddle occupies small space after being folded, has the characteristic of convenient storage and transportation, and is widely applied to the unmanned aerial vehicle. The paddle of folding oar generally can be around the pivot free rotation that the folding oar pressed from both sides at present, and the paddle leans on the centrifugal force that the oar pressed from both sides the production when high-speed rotation to expand, but folding oar is at the during operation, and especially the motor drives the oar and presss from both sides acceleration or the in-process of rotation that slows down, and the paddle can deviate the expansion position. Therefore, the common folding paddle can swing near the unfolding position in work, and the gasket contacted with the paddle on the paddle clamp can be abraded due to long-time work, so that a line gap is produced, the vibration of the whole paddle structure is further caused, the service life is shortened, and the reliability is reduced. Secondly along with more and more large size polymer paddle is applied to unmanned aerial vehicle's folding oar in, the quality of paddle itself is bigger and bigger to because polymer paddle itself has certain appearance difference after the shaping, make two paddles that combine together often can produce uneven aerodynamic force. Further, when the motor is driven to operate, uneven pneumatic acting force and the rigidity of the polymer often generate resonance in a working rotating speed section, and flight safety is affected.

Disclosure of Invention

The invention aims to solve the problems that: the lockable folding paddle and the unmanned aerial vehicle are provided, abrasion between the paddle and a paddle clamp can be reduced, the service life of the folding paddle is prolonged, and the resonance problem caused by large-size polymer paddles is reduced.

The technical scheme provided by the invention for solving the problems is as follows: a lockable folding paddle comprises a paddle and a paddle clamp, wherein the paddle is rotatably arranged on the paddle clamp, and the paddle can be unfolded or folded relative to the paddle clamp; the blade clamp further comprises a locking bolt assembly, and the locking bolt assembly is used for limiting the relative rotation of the blade relative to the blade clamp after the blade is unfolded relative to the blade clamp.

Preferably, the deadbolt assembly is disengageable from the blade and blade clamp under an applied external force, thereby enabling relative rotation of the blade and blade clamp to collapse the blade.

Preferably, the dead bolt subassembly includes pressing the subassembly and the joint portion, joint portion can be inside the pressing the subassembly of withdrawing after the external force presses the pressing the subassembly.

Preferably, the pressing assembly comprises a bolt body, a spring and a movable shaft, wherein the bolt body is provided with an axial containing hole and a movable hole, the movable shaft is movably arranged in the containing hole and the movable hole, the spring sleeve is arranged on one section of the movable shaft in the containing hole, the movable shaft is arranged on one section of the containing hole and is provided with a limiting bulge, one end of the spring is abutted against the bottom of the hole of the containing hole, and the other end of the spring is abutted against the limiting bulge.

Preferably, the joint portion is circular card ball, the lower extreme of loose axle is equipped with the holding tank, the lower extreme of the lateral wall of activity hole be equipped with circular card ball complex through-hole, circular card ball can partially bulge to outside the through-hole.

Preferably, the oar presss from both sides hypoplastron and oar and presss from both sides the upper plate including the oar, the oar presss from both sides the hypoplastron and presss from both sides the hypoplastron with the oar and pass through coupling assembling and be connected.

Preferably, coupling assembling includes spliced pole and bolt, the spliced pole sets up the up end of oar clamp hypoplastron, the oar presss from both sides on the upper plate and is equipped with the fixed orifices with bolt complex on the position that corresponds with the spliced pole.

Preferably, the paddle has two, the one end of paddle is equipped with mounting hole and spacing hole one, the mounting hole with the spliced pole cooperation, the paddle presss from both sides the hypoplastron and is equipped with spacing hole two on the position that spacing hole one corresponds, the paddle presss from both sides the upper plate and is equipped with spacing hole three on the position that spacing hole one corresponds, the locking bolt subassembly passes spacing hole three, spacing hole one and spacing hole two pairs of paddles in proper order and carries on spacingly.

Preferably, the both ends that the lower terminal surface of hypoplastron up end and oar clamp upper plate were pressed from both sides to the oar all are equipped with the gasket and hold the chamber, the gasket holds the intracavity and installs self-lubricating gasket.

An unmanned aerial vehicle comprising said lockable folding blades.

Compared with the prior art, the invention has the advantages that: according to the invention, the blade can be locked at the maximum unfolding position by introducing the locking bolt component, so that the problem of gasket abrasion in a working state is solved; the locking bolt component can be used as a part of the blade clamp, so that the strength of the root of the blade is improved, the stress of the root is improved, and the fatigue resistance time of the blade is prolonged; according to the invention, the locking bolt and the matched paddle clamp are adopted, the second fixing of the paddle is realized through the locking bolt component, the bolt component forms a longer arm of force length for the root part of the paddle, the stability of the fixing between the paddle and the paddle clamp is improved, and the vibration performance of the paddle under the action of pneumatic force is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic view of the blade of the present invention deployed;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a cross-sectional view of the deadbolt assembly of the present invention locked with a blade and paddle clamp;

FIG. 4 is a cross-sectional view of the deadbolt assembly of the present invention unlocked with the blade and blade clamp;

FIG. 5 is a schematic view of the paddle of the present invention after folding;

the attached drawings are marked as follows: 1. a dead bolt assembly; 2. a third limiting hole; 3. the paddle clamps the upper plate; 4. sleeving a steel sleeve I; 5. a paddle; 6. a self-lubricating gasket; 7. connecting columns; 8. the paddle clamps the lower plate; 9. a first limiting hole; 10. a second steel sleeve; 11. a bolt; 12. a movable shaft; 13. a spring; 14. an accommodation hole; 15. a round blocking ball; 16. accommodating grooves; 17. mounting holes; 18. a plug pin body; 19. the gasket holds the chamber, 20, spacing arch, 21, fixed orifices, 22, spacing hole two.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples; therefore, the realization process of solving the technical problems and achieving the technical effects by applying technical means can be fully understood and implemented.

The embodiment of the invention is shown in fig. 2, and the lockable folding paddle comprises a paddle 5 and a paddle clip, wherein the paddle 5 is rotatably arranged on the paddle clip, the paddle 5 can be unfolded or folded relative to the paddle clip, and as shown in fig. 1, the paddle is in an unfolded state relative to the paddle clip; as shown in fig. 5, the blade is in a folded state relative to the blade clip; the blade clamp is characterized by further comprising a locking bolt assembly 1, wherein the locking bolt assembly 1 is used for limiting the relative rotation of the blade 5 relative to the blade clamp after the blade 5 is unfolded relative to the blade clamp.

In this embodiment, the deadbolt assembly 1 is capable of disengaging from the blade 5 and blade clamp under an applied external force, thereby enabling relative rotation of the blade 5 and blade clamp to collapse the blade 5.

In this embodiment, the dead bolt assembly 1 includes a pressing assembly and a clamping portion, and the clamping portion can be retracted into the pressing assembly after the pressing assembly is pressed by external force.

In this embodiment, specifically refer to fig. 3 and 4, the pressing component includes bolt body 18, spring 13 and loose axle 12, be equipped with axial accommodation hole 14 and movable hole on the bolt body 18, the activity of loose axle 12 sets up in accommodation hole 14 and movable hole, spring 13 cover is established at one section that loose axle 12 is located accommodation hole 14, loose axle 12 is located and is equipped with spacing arch 20 on one section of accommodation hole 14, the butt of spring 13 one end and accommodation hole 14's hole bottom, the butt of the other end and spacing arch 20.

In this embodiment, joint portion is circular card ball 15, the lower extreme of loose axle 12 is equipped with holding tank 16, the lower extreme of the lateral wall of activity hole be equipped with circular card ball 15 complex through-hole, circular card ball 15 can partially bulge to outside the through-hole.

Specifically, the dead bolt subassembly itself is the steel structure spare, provides the intensity of the bolt self after sufficient plug like this, reduces wearing and tearing.

In this embodiment, the oar presss from both sides including oar presss from both sides hypoplastron 8 and oar and presss from both sides upper plate 3, oar presss from both sides hypoplastron 8 and is connected through coupling assembling with oar clamp hypoplastron 8.

In this embodiment, coupling assembling includes spliced pole 7 and bolt 11, spliced pole 7 sets up the upper end face of oar clamp hypoplastron 8, the oar presss from both sides and is equipped with on the position that corresponds with spliced pole 7 on the upper plate 3 with bolt 11 complex fixed orifices 21.

In this embodiment, paddle 5 has two, the one end of paddle 5 is equipped with mounting hole 17 and spacing hole one 9, mounting hole 17 with the cooperation of spliced pole 7, the oar presss from both sides and is equipped with spacing hole two 22 on 8 and the position that spacing hole one 9 corresponds of hypoplastron, the oar presss from both sides and is equipped with spacing hole three 2 on the position that upper plate 3 and spacing hole one 9 correspond, locking bolt subassembly 1 passes spacing hole three 2, spacing hole one 9 and spacing hole two 22 in proper order and carries on spacingly to paddle 5. In order to improve the stability of the locking bolt assembly in cooperation with the third limiting hole 2, the first limiting hole 9 and the second limiting hole 22 and prevent the locking bolt assembly from being damaged by the third limiting hole 2, the first limiting hole 9 and the second limiting hole due to repeated plugging and unplugging, a first steel sleeve is sleeved in the third limiting hole 2, the first limiting hole 9 and the second limiting hole 22.

Meanwhile, a second steel sleeve is embedded in the mounting hole of the blade, and the strength and the matching precision of the root of the blade are guaranteed when the second steel sleeve is in running fit with the rotating shaft of the blade clamp.

And more specifically, a limiting hole IV with the diameter slightly larger than that of the limiting hole III is formed in the bottom of the limiting hole III, and a steel sleeve III is arranged in the limiting hole IV, so that the circular clamping ball is in locking contact with one end face of the steel sleeve, the surface hardness of the steel sleeve is enough, and compared with an aluminum alloy material of the paddle clamp, the circular clamping ball is ensured to be in contact with the steel sleeve and not to be obviously deformed under heavy pressure, and the circular clamping ball cannot be obviously abraded after being plugged and pulled for many times.

In this embodiment, the both ends of oar clamp 8 up end and the lower terminal surface of oar clamp upper plate 3 of oar clamp down board all are equipped with the gasket and hold chamber 19, the gasket holds and installs self-lubricating gasket 6 in the chamber 19. The self-lubricating gasket can improve the stability of matching and fixing among the lower plate of the paddle clamp, the paddle and the upper plate of the paddle clamp.

The locking and unlocking process of the locking bolt assembly can be specifically shown in fig. 3 and 4, firstly, the movable shaft is pressed downwards to enable the lower end of the movable shaft to be in contact with the bottom of the movable hole, the circular clamping ball enters the accommodating groove under the extrusion effect of the wall of the movable hole, then the bolt body is aligned to the limiting hole III to be inserted into the limiting hole III until one end of the bolt body penetrates through the limiting hole II, then the hand is loosened, the movable shaft moves upwards under the action of the spring to enable the circular clamping ball to be separated from the accommodating groove, and in the process, the circular clamping ball is extruded out of the through hole under the extrusion effect of the movable shaft and is clamped with the lower end of the steel sleeve I, so that the limiting of the paddle is completed.

The invention also provides the unmanned aerial vehicle, the lockable folding blades of the unmanned aerial vehicle can refer to the existing design, and the details are not repeated here.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.

Claims

1. A lockable folding paddle comprising a paddle (5) and a paddle clip, characterized in that: the paddle (5) is rotationally arranged on the paddle clamp, and the paddle (5) can be unfolded or folded relative to the paddle clamp; the blade clamp is characterized by further comprising a locking bolt assembly (1), wherein the locking bolt assembly (1) is used for limiting the relative rotation of the blade (5) relative to the blade clamp after the blade (5) is unfolded relative to the blade clamp.

2. A lockable folding blade according to claim 1, characterised in that: the dead bolt subassembly (1) can break away from paddle (5) and oar clamp under the effect of applied external force to make paddle (5) and oar clamp can rotate relatively in order to fold paddle (5).

3. A lockable folding blade according to claim 1, characterised in that: the locking bolt assembly (1) comprises a pressing assembly and a clamping portion, and the clamping portion can retract into the pressing assembly after the pressing assembly is pressed by external force.

4. A lockable folding blade according to claim 3, characterised in that: the press assembly comprises a bolt body (18), a spring (13) and a movable shaft (12), wherein an axial accommodating hole (14) and a movable hole are formed in the bolt body (18), the movable shaft (12) is movably arranged in the accommodating hole (14) and the movable hole, the spring (13) is sleeved on one section of the movable shaft (12) located in the accommodating hole (14), the movable shaft (12) is located in one section of the accommodating hole (14) and is provided with a limiting bulge (20), one end of the spring (13) is abutted to the bottom of the accommodating hole (14), and the other end of the spring is abutted to the limiting bulge (20).

5. A lockable folding blade according to claim 4, characterised in that: joint portion is circular card ball (15), the lower extreme of loose axle (12) is equipped with holding tank (16), the lower extreme of the lateral wall of activity hole be equipped with circular card ball (15) complex through-hole, circular card ball (15) can partly bulge to outside the through-hole.

6. A lockable folding blade according to claim 1, characterised in that: the oar presss from both sides hypoplastron (8) and oar including the oar and presss from both sides upper plate (3), oar presss from both sides hypoplastron (8) and is connected through coupling assembling with oar clamp hypoplastron (8).

7. A lockable folding blade according to claim 6, characterised in that: coupling assembling includes spliced pole (7) and bolt (11), spliced pole (7) set up the upper end face of oar clamp hypoplastron (8), the oar presss from both sides and is equipped with on the position that corresponds with spliced pole (7) on upper plate (3) with bolt (11) complex fixed orifices (21).

8. A lockable folding blade according to claim 7, characterised in that: paddle (5) have two, the one end of paddle (5) is equipped with mounting hole (17) and spacing hole (9), mounting hole (17) with spliced pole (7) cooperation, the oar presss from both sides and is equipped with spacing hole two (22) on the position that hypoplastron (8) and spacing hole (9) correspond, the oar presss from both sides and is equipped with spacing hole three (2) on the position that upper plate (3) and spacing hole (9) correspond, locking bolt subassembly (1) passes spacing hole three (2), spacing hole one (9) and spacing hole two (22) in proper order and carries on spacingly to paddle (5).

9. A lockable folding blade according to claim 6, characterised in that: the both ends that the lower terminal surface of oar clamp hypoplastron (8) up end and oar clamp upper plate (3) all are equipped with the gasket and hold chamber (19), install self-lubricating gasket (6) in the gasket holds chamber (19).

10. An unmanned aerial vehicle, characterized in that: the unmanned aerial vehicle comprising lockable folding blades according to any of claims 1 to 9.