WO2019085150A1

WO2019085150A1 - Foldable propeller, and unmanned aerial vehicle

Info

Publication number: WO2019085150A1
Application number: PCT/CN2017/115030
Authority: WO
Inventors: 徐文康; 邱健达
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2017-10-31
Filing date: 2017-12-07
Publication date: 2019-05-09
Also published as: CN207875978U; CN109952248A

Abstract

A foldable propeller, and an unmanned aerial vehicle. The foldable propeller comprises: a propeller holding base (1) used for installation of a propeller blade (3), the propeller blade (3) being foldable and expandable with respect to the propeller holding base (1); and a position limiting mechanism (2) used to restrict rotation of the propeller blade (3) with respect to the propeller holding base (1) when the propeller blade (3) is expanded with respect to the propeller holding base (1). The foldable propeller keeps the propeller blade (3) in an expanded position after expansion, reduces wear between the propeller blade (3) and the propeller holding base (1), has reliable functions provided by an overall structure, and is easy to operate and implement.

Description

Folding paddle and unmanned aerial vehicle

Technical field

The present invention relates to the field of unmanned aerial vehicles, and more particularly to a folding paddle and an unmanned aerial vehicle.

Background technique

The rotors on unmanned aerial vehicles provide lift and thrust for unmanned aerial vehicles and are key components of unmanned aerial vehicles. Because of its small footprint after folding, the folding paddle has the characteristics of convenient storage and transportation, and is widely used in unmanned aerial vehicles. At present, the blades of the folding paddle are generally free to rotate about the rotating shaft on the paddle of the folding paddle, and the blade is deployed by the centrifugal force generated when the paddle is rotated at a high speed. However, during the operation of the folding paddle, especially when the motor drives the paddle to accelerate or decelerate, the blade will deviate from the deployed position. Therefore, the ordinary folding paddle will swing near the deployed position during the working process, and the blade and the paddle (or the pad on the paddle) will wear after a long time of work, thereby degrading the performance of the folding paddle and shortening the folding paddle. Service life.

Summary of the invention

The object of the present invention is to solve the technical problems existing in the prior art, and provide a folding paddle and an unmanned aerial vehicle having the same, which can reduce the wear between the blade and the paddle holder and prolong the service life of the folding paddle.

In order to solve the above problems, the technical solution adopted by the present invention is:

The present invention provides a folding paddle, the folding paddle comprising: a paddle, a paddle holder and a limiting mechanism mounted on the paddle holder, wherein

a paddle holder for mounting a blade, the blade being expandable relative to the paddle holder or fold;

The limiting mechanism is configured to limit rotation of the paddle relative to the paddle holder when the paddle is deployed relative to the paddle holder.

Further, the limiting mechanism is further configured to release the rotation limit of the blade relative to the paddle holder when an external force is applied to enable the blade to be folded relative to the paddle holder.

Further, the limiting mechanism includes a limiting portion and a resilient member, the limiting portion includes a limiting operating portion, the blade includes a blade body and a limiting insert mounted at an end of the blade body;

When the paddle is unfolded relative to the paddle holder, the elastic member abuts the limiting portion to form a limit fit of the limiting operation portion and the limit insert of the blade to limit the paddle Rotation relative to the paddle holder.

Further, when an external force is applied to the limiting portion, the elastic member that abuts the limiting portion is compressed to release the limit fit formed by the limiting operation portion and the limit insert of the blade, thereby releasing The rotation of the paddle relative to the paddle holder is limited.

Further, the limiting insert includes a limiting slot; when the paddle is unfolded relative to the paddle holder, the elastic member abuts the limiting portion to protrude the limiting operation portion The limiting slot is configured to limit the rotation of the blade relative to the paddle holder.

Further, when an external force is applied to the limiting portion, the elastic member that abuts the limiting portion is compressed, and the limiting operation portion is withdrawn from the limiting slot, thereby releasing the blade relative to the blade The rotation of the paddle holder is limited.

Further, the limiting slot is a limiting slot disposed obliquely with respect to the rotation axis, wherein the rotating shaft is a rotating shaft of the blade relative to the paddle holder;

The limit operating portion is a wedge that cooperates with the limiting slot.

Further, the limiting insert further includes an arc sliding surface that cooperates with the wedge;

When the blade is folded relative to the paddle holder, the wedge wedge abuts against the curved sliding surface under the action of the elastic member.

Further, the paddle holder includes an upper paddle holder and a lower paddle holder, an upper paddle holder and a lower paddle holder The seats are oppositely disposed, wherein the blades are mounted to the upper and lower paddle holders by connectors.

Further, the lower paddle holder includes a mounting portion; the mounting portion is configured to limit a stroke of the limiting portion to move toward the upper paddle holder;

One end of the elastic member abuts the limiting portion, and the other end of the elastic member abuts the lower pad holder.

Further, the paddle holder further includes a locking piece, and the locking piece and the limiting portion respectively provide a blind hole, wherein the blind hole on the locking piece and the blind hole position on the limiting portion are opposite Correspondingly; one end of the elastic member abuts the blind hole entering the limiting portion, and the other active end of the elastic member abuts the corresponding blind hole on the locking piece.

Further, the limiting portion further includes a limit pressing portion for receiving the external force applied.

Further, the upper paddle holder includes a through hole corresponding to the limit pressing portion.

Further, the blade body and the limit insert are integrally formed.

The present invention also provides an unmanned aerial vehicle comprising the above-described folded stack.

Compared with the prior art, the beneficial effects of the present invention are:

The utility model provides a folding paddle and an unmanned aerial vehicle, wherein the folding paddle securely limits the blade after being deployed by the limiting mechanism to keep it in the deployed position, and during the use of the folding frame, The wear between the paddle and the paddle holder is reduced, thereby prolonging the service life of the folding paddle; in addition, the entire folding paddle has a simple structure, a compact layout, and a simple appearance.

DRAWINGS

Figure 1 is a perspective view of a folding paddle of the present invention.

Figure 2 is an exploded view of the folding paddle of the present invention.

Figure 3 is a partial cross-sectional view of the folding paddle of the present invention.

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 3;

Fig. 5 is a cross-sectional view taken along line C-C of Fig. 3;

Figure 6 is a schematic view showing the structure of the upper paddle holder in the folding paddle of the present invention.

Figure 7 is a schematic view showing the structure of the lower paddle holder in the folding paddle of the present invention.

FIG. 8 is a schematic structural view of a limiting portion in the limiting mechanism of the present invention.

Figure 9 is a schematic view showing the structure of the limit insert of the present invention.

Fig. 10 is a view showing another embodiment of the stopper portion in the present invention.

Description of the reference signs:

1-paddle holder

2-limit mechanism

3-blade

11-Upper paddle holder

12-low paddle holder

13-connector

111-upper connection

112-locking part

1111-through hole

1121-upper shaft hole

121-lower connection

122-lower lock

1211-cavity

1221-lower shaft hole

21-limits

22-elastic parts

211-Limited operation department

212-limit press

213-protrusion

14-lock piece

141-sink hole

142-blind hole

31-blade body

32-limit insert

321-coordination department

322-insert part

323-curve card slot

324-shaft hole

3221-limit slot

3222-curved slip surface

51-upper gasket

52-lower gasket

8-screw

9-nylon column

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the understanding of the present disclosure will be more fully understood.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

Referring to Figure 1, the present invention provides a folding paddle comprising a paddle holder 1, a limit mechanism 2 and a paddle 3 for mounting a blade 3, the paddle 3 being opposite to the paddle 3 The paddle holder 1 can be unfolded or folded. When the folding paddle is in use, the paddle 3 can be in an unfolded state relative to the paddle holder 1; when not in use, the paddle 3 can be folded relative to the paddle holder 1 to reduce the folding paddle take up space.

The limiting mechanism 2 is configured to limit the rotation of the paddle 3 relative to the paddle holder 1 when the paddle 3 is deployed relative to the paddle holder 1. In this way, during the use of the folding paddle, the wear between the paddle 3 and the paddle holder 1 can be reduced, and the service life of the folding paddle can be prolonged.

The limiting mechanism 2 is further configured to release the rotation restriction of the blade 3 relative to the paddle holder 1 when an external force is applied, so that the blade 1 can be folded relative to the paddle holder 3 . When it is no longer necessary to use the folding paddle, the user can apply a force to the limiting mechanism 2 to release the rotation limit of the blade 3 relative to the paddle holder 1, so that the blade 3 can be folded up, thereby reducing the folding paddle. Take up space when not in use.

Referring to FIGS. 2-9, the limiting mechanism 2 includes a limiting portion 21 and a resilient member 22, the limiting portion 2 includes a limiting operating portion 211, the blade 3 includes a blade body 31 and is mounted on a limit insert 32 of the blade body end;

When the paddle 3 is unfolded relative to the paddle holder 1, the elastic member 22 abuts the limiting portion 21 to limit the limit operating portion 212 and the limiting insert 32 of the blade 3. The position is matched to limit the rotation of the paddle 3 relative to the paddle holder 1. When the paddle 3 is unfolded relative to the paddle holder 1 , the elastic member 22 abuts against the limiting portion 21 , so that the limiting operation portion 211 of the limiting portion 21 can form a limit with the limiting insert 32 . In a bit fit, the limit fit is used to limit the rotation of the paddle 3 relative to the paddle holder 1.

When the external force is applied to the limiting portion 21, the elastic member 22 that resists the limiting portion 21 is compressed to release the limit fit formed by the limiting operation portion 211 and the limiting insert 32 of the blade 3. Thereby, the rotation restriction of the blade 3 with respect to the paddle holder 1 is released. When it is no longer necessary to use the folding paddle, the user can apply a force to the limiting portion 21, at which time the elastic member 22 abutting on the limiting portion 21 is compressed, and the limiting portion 21 is along the elastic member 22. The direction of compression is moved, so that the limit fit between the limit operating portion 211 and the limit insert 32 on the limiting portion 21 is After lifting and releasing the limit fit, the paddle 3 can be rotated relative to the paddle holder 1 to achieve folding.

In some embodiments, the limiting insert 32 includes a limiting slot 3221; the resilient member 22 abuts the limiting portion 21 when the blade 3 is deployed relative to the paddle holder 1 The limiting operation portion 211 is protruded into the limiting slot 3221, and a limiting fit is formed between the limiting operating portion 211 and the limiting slot 3221 on the limiting insert 32 to limit the blade 3 Relative to the rotation of the paddle holder 1.

When the external force is applied to the limiting portion 21, the elastic member 22 that resists the limiting portion 21 is compressed, and the limiting portion 21 moves along the direction in which the elastic member 22 is compressed. At this time, the limiting operation The portion 211 is withdrawn from the limiting groove 3221, thereby releasing the rotation restriction of the paddle 3 relative to the pad holder 1.

Further, the limiting slot 3221 on the limiting insert 32 is a limiting slot disposed obliquely with respect to the rotation axis, wherein the rotating shaft axis is the paddle 3 relative to the paddle holder 1 The axis of rotation. The limit operating portion 211 is a wedge engaged with the limiting slot 3221. When the blade 3 is deployed relative to the paddle holder 1, the wedge protrudes into the limiting slot 3221 under the action of the elastic member 22. To form a limit fit.

Further, the limit insert 32 further includes an arc-shaped sliding surface 3222 that cooperates with the wedge. When the blade 3 is folded relative to the pad holder 1, the wedge is abutted against the curved sliding surface 3222 by the elastic member 22. The curved sliding surface 3221 may be disposed at two ends of the limiting slot 3221. Under the action of an external force, the limit cooperation between the wedge wedge and the limiting slot 3221 is released, and the user can fold the blade 3, The wedge is abutted against the curved sliding surface 3222 by the elastic member 22; when the user wants to deploy the blade, the user can operate the blade 3, and during the deployment of the blade 3, the elastic member 22 is The abutting wedge can slide on the curved sliding surface 3222 until the wedge protrudes into the limiting slot 3221 to form a limit fit between the wedge and the limiting slot 3221.

Further, the limiting insert 32 further includes a fitting portion 321 and an insert portion 322 that cooperate with the end of the blade main body 31, and the engaging portion 321 is coupled to the insert portion 322 and formed with the An arcuate card slot 323 mating with the end of the blade body, the insert portion 322 is provided with the limit The bit groove 3221 and the curved sliding surface 3222. In this embodiment, the engaging portion 321 is a cylindrical body, and of course, the shape thereof can be arbitrarily selected.

In some embodiments, the limiting insert 32 includes a protruding portion, and the limiting operating portion 211 may be a limiting slot, when the paddle 3 is unfolded relative to the paddle holder 1 The elastic member 22 abuts the limiting portion 21 to protrude the protruding portion of the limiting insert 32 into the limiting operation portion 211, and the convexity of the limiting operation portion 211 and the limiting insert 32 A limit fit is formed between the extensions to limit rotation of the paddle 3 relative to the paddle holder 1.

When the external force is applied to the limiting portion 21, the elastic member 22 that resists the limiting portion 21 is compressed, and the limiting portion 21 moves along the direction in which the elastic member 22 is compressed. At this time, the limit is embedded. The projection of the piece 22 is withdrawn from the limit operating portion 211, thereby releasing the rotation restriction of the paddle 3 relative to the pad holder 1.

The pad holder 1 includes an upper paddle holder 11 and a lower paddle holder 12, and the upper paddle holder 11 and the lower paddle holder 12 are disposed opposite each other and form an installation space for mounting the paddle 3, wherein The paddles 3 are mounted to the upper paddle holder 11 and the lower paddle holder 12 via a connector 13.

Further, the upper paddle holder 11 includes an upper connecting portion 111 and an upper locking portion 112, wherein the upper connecting portion 111 is one and the upper locking portion 112 is two. The upper connecting portion 111 is located at a middle portion of the upper paddle holder 11 , and the two upper locking portions 112 are symmetrically located at two sides of the upper connecting portion 111 .

Further, the lower paddle holder 12 includes a lower locking portion 122 corresponding to the upper locking portion 112, wherein the connecting member 13 can sequentially pass through the upper locking portion 112, the paddle 3 and the lower locking portion 122, through which The blade 3 is mounted to the upper paddle holder 11 and the lower paddle holder 12 in a manner.

Specifically, the upper locking portion 112 includes an upper shaft receiving hole 1121, and the lower locking portion 122 includes a lower shaft connecting hole 1221, and the lower shaft connecting hole 1221 corresponds to the position of the upper shaft receiving hole 1121. The connecting member 13 sequentially passes through the upper shaft receiving hole 1121, the paddle 3 and the lower shaft connecting hole 1121, and the blade 3 is mounted on the upper paddle holder 11 and the lower paddle holder Between 12.

The blade main body 31 is connected to the engaging portion 321 , and the two are respectively processed with a rotating shaft hole 324 . The blade body 31 is rotatable about the axis of rotation of the shaft hole 324. The rotating shaft hole 324 is located between the upper shaft connecting hole 1121 and the lower shaft connecting hole 1221 , and the three positions are corresponding to each other and the connecting member 13 is disposed. The connecting member 13 passes through the upper paddle holder 11, the blade body 31, the limit insert 32 and the lower paddle holder 12 in sequence. In this embodiment, the connecting member 13 is a paddle screw, which is threadedly engaged with the lower paddle holder 12, and the rest is an optical axis, and the blade body 31 can surround the light of the connecting member 13. The shaft portion is rotated.

An upper gasket 51 is disposed between the upper paddle holder 11 and the blade body 31, and a lower gasket 52 is disposed between the limiting insert 32 and the lower paddle holder 12 for reducing the Friction is generated between the upper paddle holder 11 and the paddle main body 31, between the limiting insert 32 and the lower paddle holder 12, thereby ensuring that the paddle 3 can be reliably unfolded relative to the paddle holder 1 or fold.

The end portion of the connecting member 13 near the threaded section is provided with a nylon column 9 which is located in the lower shaft connecting hole 1221 for preventing loosening of the connecting member 13 and causing the blade 3 to loosen.

It can be understood that in other embodiments, the blade body 31 and the limiting insert 32 may be a unitary structure.

Further, the limiting portion 21 further includes a limit pressing portion 212 for receiving the external force applied. When the user needs to fold the folding paddle, the limit pressing portion 212 can be pressed to release the rotation restriction of the paddle 3 and the paddle holder 1. Further, the upper paddle holder 11 includes a through hole 1111 corresponding to the limit pressing portion 212, and the user can press the limit pressing portion 212 through the through hole 1111.

Specifically, in the embodiment, the through hole 1111 may be disposed in the upper connecting portion 111, and the two ends of the through hole 1111 near the upper locking portion 112 are arc-shaped through holes, and the through holes are The middle portion of the 1111 is a rectangular through hole, and the circular arc-shaped through hole and the rectangular through hole have a curved surface transition. It can be understood that in other embodiments, the shape of the through hole 1111 can be arbitrarily selected according to the installation requirements, and may be any shape such as a square, a rectangle, an ellipse, a circle, or the like.

The lower paddle holder 12 further includes a lower connecting portion 121 for connecting the lower locking portion 122, wherein There are one lower connecting portion 121 and two lower locking portions 122. The lower connecting portion 121 is located at a middle portion of the lower paddle holder 12, and the two lower locking portions 122 are symmetrically located at two sides of the lower connecting portion 121. The lower connecting portion 121 corresponds to the position of the upper connecting portion 111, and the lower locking portion 122 and the upper locking portion 112 correspond to each other.

Further, the limiting portion 21 can be mounted on the lower connecting portion 121. Specifically, the lower connecting portion 121 can include a cavity 1211, wherein the cavity 1211 can be convex upward in the direction of the paddle holder 11 The seat portion 21 can be slidably coupled to the cavity 12111. At least a portion of the limiting portion 21 may be disposed in the cavity 2111, and an internal shape of the cavity 1211 may match an outer shape of the limiting portion 21.

Since the limiting portion 21 is movable back and forth along the upper paddle holder 11 inside the cavity 1211, in order to prevent the limiting portion 21 from slipping out from the cavity 1211, the lower paddle holder The 12 further includes a stopper portion (not shown) for restricting the stroke of the stopper portion 21 in the direction of the upper paddle holder 11. In this embodiment, the stop portion is a stepped surface or a protrusion formed by the inner wall of the cavity 1214. In other embodiments, the stop portion may also be located at an inner wall of the through hole 1111.

The limiting portion 21 further includes a convex portion 213 that cooperates with the stopping portion, and the convex portion 213 is located at a side surface of the limiting operation portion 211. When the limiting portion 21 moves in the direction of the upper paddle holder 11, the end surface of the convex portion 213 opposite to the upper paddle holder 11 abuts against the stop portion, thereby restricting the edge portion 21 along the edge portion The stroke in which the upper paddle holder 11 moves in the direction.

The pad holder 1 further includes a locking tab 14 that is disposed opposite the lower pad holder 12 in a direction away from the upper pad holder 11. The locking piece 14 includes a counterbore 141, and the screw 8 is sequentially passed through the counterbore 141 and the corresponding mounting hole on the lower paddle holder 12 to fix the locking piece 14 to the lower paddle On the seat 12.

A blind hole 142 is formed in the opposite end surface of the limiting portion 21 and the locking piece 14 respectively. The blind hole 142 is provided with an elastic member 22, and an active end of the elastic member 22 abuts the limit. a blind hole of the portion 21, the other end of the elastic member 22 abuts into the lock The blind hole 142 corresponding to the sheet 14 is provided. When the paddle 3 is unfolded relative to the paddle holder 1, the elastic member 22 abuts the limiting portion 21 to form a limit fit of the limiting operation portion 211 and the paddle 3 to limit the paddle The rotation of the leaf 3 relative to the paddle holder 1. In this embodiment, the elastic member 22 is a spring, and the number of the elastic members 22 is equal to the number of the limiting holes 21 and the blind holes 142 on the locking piece 14, and may be one or more. Increase or decrease according to actual needs.

It can be understood that, in other embodiments, the limiting portion 21 can also be assembled by using multiple parts. Referring to FIG. 10, the limiting portion 21 includes a first limiting portion 231, a second limiting portion 232, and a a third limiting portion 233, wherein the first limiting portion 231 is located at a middle portion, and the second limiting portion 232 and the third limiting portion 233 are located at two sides of the first limiting portion 231, and the three are respectively processed The blind hole is provided with an elastic member 22. The second limiting portion 232 and the third limiting portion 233 are engaged with the limiting insert 32, and the first limiting portion 231 is engaged with the stopping portion. The first limiting portion 231 and the second limiting portion 232 are disposed between the first limiting portion 231 and the third limiting portion 233 by a boss and a step surface. The stroke of the second limiting portion 232 and the third limiting portion 233 along the upper paddle holder 11 . When the first limiting portion 231 is applied with an external force, the first limiting portion 231 acts on the second limiting portion 232 and the third limiting portion 233, respectively, and releases the two with the limiting insert 32. In cooperation, the rotation limit of the blade 3 relative to the paddle holder 1 is released.

The present invention also provides an unmanned aerial vehicle using the folding paddle described above.

In the present invention, the folding paddle maintains the paddle 3 in the deployed position after deployment by the limiting mechanism 2, which can reduce the wear between the paddle 3 and the paddle holder 1. The limiting mechanism 2 adopts the cooperation of the oblique wedge and the limiting slot to achieve the limit position, and the adopted matching mode is simple, reliable and easy to implement. After the folding paddle is used, the limiting mechanism 2 can be unlocked by the compression spring, and the wedge can be unlocked reliably and conveniently, thereby folding the folding paddle.

In the invention, the structural shape of each part of the folding paddle can ensure the simple structure and simple appearance of the folding paddle; the matching relationship and layout of each part structure can ensure the function of the folding paddle At the same time, it is compact, compact and saves installation space.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and combinations thereof may be made without departing from the spirit and scope of the invention. Simplifications should all be equivalent replacements and are included in the scope of the present invention.

Claims

A folding paddle, characterized in that: the folding paddle comprises: a paddle, a paddle holder and a limiting mechanism mounted on the paddle holder, wherein

The paddle holder for mounting a blade, the blade being expandable or foldable relative to the paddle holder;

The limiting mechanism is configured to limit rotation of the paddle relative to the paddle holder when the paddle is deployed relative to the paddle holder.
The folding paddle according to claim 1, wherein the limiting mechanism is further configured to release a rotation limit of the blade relative to the paddle holder when an external force is applied, so that the blade can Folded relative to the pad holder.
The folding paddle according to claim 2, wherein the limiting mechanism includes a limiting portion and an elastic member, the limiting portion includes a limiting operating portion, the blade includes a blade body and is mounted on the paddle a limit insert at the end of the leaf body;

When the paddle is unfolded relative to the paddle holder, the elastic member abuts the limiting portion to form a limit fit of the limiting operation portion and the limit insert of the blade to limit the paddle Rotation relative to the paddle holder.
The folding paddle according to claim 3, wherein when the stopper is applied with an external force, the elastic member that abuts the stopper is compressed to release the limit of the limit operation portion and the blade The limit formed by the bit insert cooperates to relieve the rotational limit of the blade relative to the paddle holder.
The folding paddle according to claim 4, wherein the limiting insert includes a limiting groove; and the elastic member abuts the limiting portion when the paddle is unfolded relative to the pad holder The limit operating portion is protruded into the limiting slot to limit the rotation of the blade relative to the paddle holder.
A folding paddle according to claim 5, wherein

When an external force is applied to the limiting portion, the elastic member that abuts the limiting portion is compressed, and the limiting operation portion is withdrawn from the limiting groove, thereby releasing the blade relative to the paddle The rotation limit of the holder.
The folding paddle according to claim 6, wherein

The limiting slot is a limiting slot disposed obliquely with respect to the axis of rotation, wherein the axis of the rotating shaft is an axis of rotation of the blade relative to the paddle holder;

The limit operating portion is a wedge that cooperates with the limiting slot.
The folding paddle according to claim 7, wherein said limit insert further comprises an arcuate sliding surface that cooperates with the wedge;

When the blade is folded relative to the paddle holder, the wedge wedge abuts against the curved sliding surface under the action of the elastic member.
The folding paddle according to claim 4, wherein the paddle holder comprises an upper paddle holder and a lower paddle holder, and the upper paddle holder and the lower paddle holder are oppositely disposed, wherein the paddle is connected The pieces are mounted to the upper and lower paddle holders.
The folding paddle according to claim 9, wherein the lower paddle holder comprises a stop portion; and the stop portion is configured to limit a stroke of the limit portion to move toward the upper paddle holder;

One end of the elastic member abuts the limiting portion, and the other end of the elastic member abuts the lower pad holder.
The folding paddle according to claim 1, wherein the paddle holder further comprises a locking piece, and the locking piece and the limiting portion are respectively provided with a blind hole, wherein the blind hole on the locking piece is The position of the blind hole on the limiting portion corresponds to; the one end of the elastic member abuts the blind hole entering the limiting portion, and the other active end of the elastic member abuts the corresponding locking piece Blind hole.
The folding paddle according to claim 9, wherein the stopper portion further includes a limit pressing portion for receiving the external force applied.
The folding paddle according to claim 12, wherein the upper paddle holder includes a through hole corresponding to the limit pressing portion.
The folding paddle according to claim 2, wherein the blade body and the limit insert are integrally formed.
An unmanned aerial vehicle, comprising: a folding paddle, the folding paddle comprising a paddle, a paddle holder and a limiting mechanism mounted on the paddle holder

The paddle holder for mounting a blade, the blade being expandable or foldable relative to the paddle holder;

The limiting mechanism is configured to limit rotation of the paddle relative to the paddle holder when the paddle is deployed relative to the paddle holder.
The UAV according to claim 15, wherein the limiting mechanism is further configured to release a rotation limit of the blade relative to the paddle holder when an external force is applied, so that the blade It can be folded relative to the pad holder.
The UAV according to claim 16, wherein the limiting mechanism includes a limiting portion and an elastic member, the limiting portion includes a limiting operating portion, the blade includes a blade body and is mounted on a limit insert of the end of the blade body;

When the paddle is unfolded relative to the paddle holder, the elastic member abuts the limiting portion to form a limit fit of the limiting operation portion and the limit insert of the blade to limit the paddle Rotation relative to the paddle holder.
The UAV according to claim 17, wherein when the stopper is applied with an external force, the elastic member that abuts the stopper is compressed to release the stopper operation portion and the blade The limit insert forms a limit fit to relieve the rotation limit of the blade relative to the paddle holder.
The UAV according to claim 18, wherein said limit insert includes a limit groove; said elastic member abuts said limit when said paddle is unfolded relative to said pad holder a portion for projecting the limit operating portion into the limiting slot to limit the blade relative to the paddle The rotation of the holder.
The UAV according to claim 19, wherein

When an external force is applied to the limiting portion, the elastic member that abuts the limiting portion is compressed, and the limiting operation portion is withdrawn from the limiting groove, thereby releasing the blade relative to the paddle The rotation limit of the holder.
An unmanned aerial vehicle according to claim 20, wherein

The limiting slot is a limiting slot disposed obliquely with respect to the axis of rotation, wherein the axis of the rotating shaft is an axis of rotation of the blade relative to the paddle holder;

The limit operating portion is a wedge that cooperates with the limiting slot.
The UAV according to claim 21, wherein said limit insert further comprises an arcuate slip surface that cooperates with the wedge;

When the blade is folded relative to the paddle holder, the wedge wedge abuts against the curved sliding surface under the action of the elastic member.
The UAV according to claim 18, wherein the paddle holder comprises an upper paddle holder and a lower paddle holder, and the upper paddle holder and the lower paddle holder are oppositely disposed, wherein the paddle passes A connector is mounted to the upper and lower paddle holders.
The UAV according to claim 23, wherein the lower paddle holder includes a stop portion; and the stop portion is configured to limit a stroke of the limit portion to move toward the upper paddle holder ;

One end of the elastic member abuts the limiting portion, and the other end of the elastic member abuts the lower pad holder.
The UAV according to claim 15, wherein the paddle holder further comprises a locking piece, and the locking piece and the limiting portion are respectively provided with a blind hole, wherein the blind hole on the locking piece Corresponding to the position of the blind hole on the limiting portion; one active end of the elastic member abuts the blind hole entering the limiting portion, and the other active end of the elastic member abuts the locking piece Corresponding blind holes.
The UAV according to claim 23, wherein the limiting portion further includes a limit pressing portion for receiving the external force applied.
The UAV according to claim 26, wherein the upper paddle holder includes a through hole corresponding to the limit pressing portion.
The UAV according to claim 16, wherein the blade body and the limit insert are integrally formed.