Propeller and aircraft with same

Abstract

The utility model discloses a propeller and an aircraft with the same. The propeller comprises a propeller seat, a propeller blade and a propeller blade, the propeller blades are arranged on the propeller base and can rotate between a folding position and an unfolding position, the propeller blades extend in the axis direction of the propeller at the folding position, the propeller blades extend in the radial direction of the propeller at the unfolding position, and limiting holes are formed in the ends, connected with the propeller base, of the propeller blades; the locking structure is arranged on the paddle seat and comprises a lock pin and a counter weight part, the lock pin has a locking position and an unlocking position, the lock pin extends into the limiting hole at the locking position so that the paddle can be fixed to the unfolding position, and the lock pin is separated from the limiting hole at the unlocking position so that the paddle can be fixed to the counter weight part. The counterweight piece is configured to drive the lock pin to move to the locking position under the action of centrifugal force generated when the propeller rotates. According to the propeller disclosed by the utility model, when the propeller rotates at a lower speed, the counter weight piece can also drive the lock pin to move to the locking position so as to fix the propeller blades at the unfolding position, so that the stability and the efficiency of the propeller during working are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of propellers, and in particular to a propeller and an aircraft having the same. Background Art

[0002] A folding propeller is a propeller device that can fold the blades when not in use. The blades of the folding propeller can be folded around the hub, usually along the axis of the propeller, which makes the device more compact during transportation and storage. This design is mainly used to improve portability and storage convenience, while still providing efficient power output during use. Folding propellers are widely used in scenarios such as drones, light aircraft, model airplanes, and underwater propulsion devices.

[0003] In the prior art, the folding propeller can be freely folded without a limit position or a locking device. In a stationary state, the propeller blades can swing freely. In a working state, relying on the centrifugal force generated by the rotation of the motor, the propeller can be opened. When the aircraft is flying at a low speed and the motor speed is not high, the propeller cannot be fully deployed, resulting in high energy consumption.

[0004] When the aircraft is flying at a high speed, the high motor speed can fully deploy the propeller. However, if a large-amplitude maneuvering flight action is performed at this time, under the action of inertia, the propeller blades will form a certain angle with the front of the aircraft, and this angle will affect the pulling line of the propeller, ultimately affecting the flight attitude of the aircraft. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a propeller. When the propeller rotates at a low speed, the counterweight can also drive the locking pin to move to the locking position to fix the blade in the deployed position, thereby effectively improving the stability and efficiency of the propeller during operation.

[0006] The utility model also provides an aircraft having the above propeller.

[0007] The propeller according to the first aspect of the present utility model includes: a propeller base; a propeller blade, which is provided on the propeller base and is rotatable relative to the propeller base between a retracted position and a deployed position. In the retracted position, the propeller blade extends along the axis direction of the propeller. In the deployed position, the propeller blade extends along the radial direction of the propeller. A limiting hole is provided at one end of the propeller blade connected to the propeller base; a locking structure, which is provided on the propeller base and includes a locking pin and a counterweight connected to the locking pin. The locking pin has a locking position and an unlocking position. In the locking position, the locking pin is adapted to cooperate with the limiting hole to fix the propeller blade in the deployed position. In the unlocking position, the locking pin is separated from the limiting hole. The counterweight is configured to drive the locking pin to move to the locking position under the action of the centrifugal force when the propeller rotates.

[0008] The propeller according to the present utility model, by providing a propeller base, a propeller blade and a locking structure, the propeller blade is provided on the propeller base and is rotatable relative to the propeller base between a retracted position and a deployed position. In the retracted position, the propeller blade extends along the axis direction of the propeller. In the deployed position, the propeller blade extends along the radial direction of the propeller. A limiting hole is provided at one end of the propeller blade connected to the propeller base. The locking structure is provided on the propeller base and includes a locking pin and a counterweight connected to the locking pin. The locking pin has a locking position and an unlocking position. In the locking position, the locking pin is adapted to cooperate with the limiting hole to fix the propeller blade in the deployed position. In the unlocking position, the locking pin is separated from the limiting hole. The counterweight is configured to drive the locking pin to move to the locking position under the action of the centrifugal force when the propeller rotates, so that when the propeller rotates at a relatively low speed, the counterweight can also drive the locking pin to move to the locking position to fix the propeller blade in the deployed position, thereby effectively improving the stability and efficiency of the propeller during operation.

[0009] In some embodiments, the locking structure further includes: an elastic member, which is connected between the counterweight and the propeller base, and the elastic member is configured to always drive the locking pin to move to the unlocking position.

[0010] In some embodiments, the elastic member is a spring and is sleeved on the locking pin, and the elastic member is configured to be compressed along the radial direction of the propeller.

[0011] In some embodiments, a sliding channel is formed on the propeller base, the sliding channel extends along the radial direction of the propeller, and the counterweight is slidably disposed in the sliding channel.

[0012] In some embodiments, a perforation is formed in the propeller seat, and the perforation extends along the radial direction of the propeller and penetrates through the inner wall surface of one side of the sliding channel facing the edge of the propeller seat and the outer peripheral surface of the propeller seat in the radial direction of the propeller. The locking pin extends along the radial direction of the propeller and is arranged outside the counterweight in the radial direction of the propeller. One end of the locking pin is connected to the counterweight, and the other end penetrates through the perforation.

[0013] In some embodiments, one of the locking pin and the inner wall surface of the perforation is provided with a sliding protrusion and the other is provided with a sliding groove, and the sliding protrusion is slidably engaged with the sliding groove along the radial direction of the propeller.

[0014] In some embodiments, the counterweight is a counterweight ball.

[0015] In some embodiments, the counterweight is provided with a fixing hole and a fastening hole, the fixing hole and the fastening hole are communicated and arranged at an angle, one end of the locking pin extends into the fixing hole, and the locking structure further includes: a fastener, the fastener passes through the fastening hole and is connected to the locking pin to fix the locking pin in the fixing hole.

[0016] In some embodiments, the number of the blades is multiple, the multiple blades are arranged at intervals along the circumferential direction of the propeller seat, the number of the locking structures is multiple, and the locking structures correspond to the multiple blades one by one.

[0017] The aircraft according to the second aspect of the present invention includes a propeller and a driving motor according to the first aspect of the present invention, and the driving motor is connected to the propeller to drive the propeller to rotate.

[0018] By providing the propeller according to the first aspect, the aircraft according to the second aspect of the present invention can enable the counterweight to drive the locking pin to move to the locking position to fix the blade in the unfolded position when the propeller rotates at a low speed, thereby effectively improving the stability and efficiency of the propeller during operation.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic view of one angle of a propeller according to an embodiment of the present invention, wherein the blade is in the unfolded position;

[0021] Figure 2 is a schematic view of another angle of a propeller according to an embodiment of the present invention, wherein the blade is in the unfolded position;

[0022] Figure 3 is a schematic diagram of a paddle base according to an embodiment of the present utility model at an angle;

[0023] Figure 4 is a schematic diagram of the paddle base according to an embodiment of the present utility model at another angle;

[0024] Figure 5 is a schematic diagram of a paddle blade according to an embodiment of the present utility model;

[0025] Figure 6 is a schematic diagram of a locking pin according to an embodiment of the present utility model;

[0026] Figure 7 is a schematic diagram of a counterweight according to an embodiment of the present utility model;

[0027] Figure 8 is a schematic diagram of an elastic member according to an embodiment of the present utility model;

[0028] Figure 9 is a schematic diagram of a fastener according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 100, propeller;

[0031] 10, paddle base; 101, sliding channel; 102, perforation; 103, first connection hole; 104, third connection hole; 11, sliding protrusion;

[0032] 20, paddle blade; 201, limiting hole; 202, second connection hole;

[0033] 30, locking structure; 31, locking pin; 310, sliding groove; 32, counterweight; 321, fixing hole; 322, fastening hole; 33, elastic member; 34, fastener;

[0034] 40, spring clip shaft;

[0035] 50, spring clip;

[0036] 60, paddle cover;

[0037] 200, drive motor. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0039] Reference is made below toFigures 1-9 Describe a propeller 100 according to an embodiment of the first aspect of the present invention.

[0040] As Figures 1-5 shown, the propeller 100 according to an embodiment of the first aspect of the present invention includes: a propeller base 10, propeller blades 20, and a locking structure 30.

[0041] The propeller blades 20 are provided on the propeller base 10 and are rotatable relative to the propeller base 10 between a retracted position and an extended position. In the retracted position, the propeller blades 20 extend along the axis direction of the propeller 100. In the extended position, the propeller blades 20 extend along the radial direction of the propeller 100. A limiting hole 201 is provided at one end of the propeller blade 20 connected to the propeller base 10. The locking structure 30 is provided on the propeller base 10 and includes a locking pin 31 and a counterweight 32 connected to the locking pin 31. The locking pin 31 has a locking position and an unlocking position. In the locking position, the locking pin 31 is adapted to cooperate with the limiting hole 201 to fix the propeller blade 20 in the extended position. In the unlocking position, the locking pin 31 is separated from the limiting hole 201. The counterweight 32 is configured to drive the locking pin 31 to move to the locking position under the action of the centrifugal force when the propeller 100 rotates.

[0042] In a specific example, for example Figure 1 and Figure 2 shown, a spring clip 50 shaft 40 is also provided in the propeller 100. For example Figure 3 and Figure 4 shown, a first connection hole 103 is provided at one end of the propeller base 10 connected to the propeller blade 20. For example Figure 5 shown, a second connection hole 202 is provided at one end of the propeller blade 20 connected to the propeller base 10. That is to say, the second connection hole 202 and the limiting hole 201 are provided at the same end of the propeller blade 20.

[0043] The spring clip 50 shaft 40 is inserted into the first connection hole 103 and fixedly connected to the propeller base 10. The propeller blade 20 is rotatably sleeved on the spring clip 50 shaft 40 through the second connection hole 202, so that the propeller blade 20 can rotate relative to the propeller base 10 between the retracted position and the extended position. It should be noted that in a specific example, the axis direction of the propeller 100 is the up-and-down direction, and the radial direction of the propeller 100 is the horizontal direction.

[0044] For example, the shapes of the first connection hole 103, the second connection hole 202, and the limiting hole 201 can be circular. Further, for example Figure 2 shown, a spring clip 50 can be provided between the spring clip 50 shaft 40 and the propeller base 10. The spring clip 50 can effectively fix the spring clip 50 shaft 40 and prevent the spring clip 50 shaft 40 from falling off. Moreover, both the spring clip 50 shaft 40 and the spring clip 50 can be quickly disassembled and assembled in the propeller 100, so as to effectively improve the maintenance efficiency.

[0045] For exampleFigure 2 As shown, a fixed connection can be adopted between the locking pin 31 and the counterweight 32, so that the locking pin 31 and the counterweight 32 can move together. The counterweight 32 can move radially outward along the propeller 100 under the action of the centrifugal force generated when the propeller 100 rotates, so as to drive the locking pin 31 to move together and drive the locking pin 31 to move to the locking position. That is to say, the counterweight 32 can drive the locking pin 31 to insert into the limiting hole 201.

[0046] It should be noted that the counterweight 32 usually has a large mass and a small volume, so that the counterweight 32 has a large inertia and a small installation space, and can effectively drive the locking pin 31 to move when the propeller 100 rotates. Further, the counterweight 32 can be made of a material with a high density. For example, the counterweight 32 can be made of steel.

[0047] In this embodiment, when the propeller 100 starts to rotate from rest and the rotation speed is greater than the idle speed value of the propeller 100, at this time, the blade 20 can be opened under the action of the centrifugal force and located at the deployed position. At the same time, the counterweight 32 can move radially outward along the propeller 100 under the action of the centrifugal force, so as to effectively drive the locking pin 31 to insert into the limiting hole 201, thereby effectively fixing the blade 20 at the deployed position. In this way, no matter whether the propeller 100 rotates at a high speed or a low speed, the blade 20 can be kept at the deployed position, thus avoiding the energy loss when the propeller 100 rotates at a low speed and the instability of the flight attitude when the propeller 100 rotates at a high speed.

[0048] In the prior art, no counterweight 32 is provided in the locking mechanism of the propeller 100. When the propeller 100 rotates, the locking pin 31 moves radially outward along the propeller 100 under the action of the centrifugal force. Since the locking pin 31 itself has a small mass, the centrifugal force required to move the locking pin 31 is large. That is to say, when the propeller 100 rotates, it needs to reach a certain rotational speed to generate a large enough centrifugal force to drive the locking pin 31 to move.

[0049] Compared with the propeller 100 in the prior art, the setting of the counterweight 32 in the present application can ensure that even the centrifugal force generated when the propeller 100 rotates at a low speed can drive the counterweight 32 to move, and then drive the locking pin 31 to penetrate into the limiting hole 201, so that the propeller 100 can effectively fix the blade 20 at the deployed position even when rotating at a low speed, thus avoiding the problem of high energy consumption caused by the blade 20 not being fully deployed when the propeller 100 rotates at a low speed.

[0050] When the rotational speed of the propeller 100 is less than the idle value or the propeller 100 stops rotating, the counterweight 32 can move inward along the radial direction of the propeller 100, thereby effectively driving the locking pin 31 to separate from the limiting hole 201 and driving the locking pin 31 to finally move to the unlocking position. When the locking pin 31 is in the unlocking position, the blade 20 can rotate around the connection between the blade 20 and the blade seat 10, and the blade 20 can finally rotate to the retracted position under the action of gravity. It should be noted that the idle value of the propeller 100 refers to the rotational speed corresponding to the engine of the propeller 100 in the idle state. When the engine of the propeller 100 is in the idle state, it can maintain the lowest effective rotational speed of the propeller 100, thereby saving energy consumption and reducing wear.

[0051] According to the propeller 100 of the embodiment of the present invention, by providing the blade seat 10, the blade 20 and the locking structure 30, the blade 20 is provided on the blade seat 10 and is rotatable relative to the blade seat 10 between the retracted position and the deployed position. In the retracted position, the blade 20 extends along the axis direction of the propeller 100, and in the deployed position, the blade 20 extends along the radial direction of the propeller 100. One end of the blade 20 connected to the blade seat 10 is provided with a limiting hole 201. The locking structure 30 is provided on the blade seat 10 and includes a locking pin 31 and a counterweight 32 connected to the locking pin 31. The locking pin 31 has a locking position and an unlocking position. In the locking position, the locking pin 31 is adapted to cooperate with the limiting hole 201 to fix the blade 20 in the deployed position. In the unlocking position, the locking pin 31 is separated from the limiting hole 201. The counterweight 32 is configured to drive the locking pin 31 to move to the locking position under the action of the centrifugal force when the propeller 100 rotates, so that when the propeller 100 rotates at a low speed, the counterweight 32 can also drive the locking pin 31 to move to the locking position to fix the blade 20 in the deployed position, thereby effectively improving the stability and efficiency of the propeller 100 during operation.

[0052] In an embodiment of the present invention, as Figure 1 shown, a blade cover 60 is further provided in the propeller 100. The blade cover 60 covers the blade seat 10, thereby effectively protecting the blade seat 10 and the locking structure 30.

[0053] In an embodiment of the present invention, as Figure 2 shown, the locking structure 30 further includes: an elastic member 33. The elastic member 33 is connected between the counterweight 32 and the blade seat 10, and the elastic member 33 is configured to always drive the locking pin 31 to move to the unlocking position. For example, one end of the elastic member 33 is connected to the counterweight 32, and the other end of the elastic member 33 is connected to the blade seat 10.

[0054] When the propeller 100 does not rotate or the centrifugal force is not sufficient to overcome the elastic force of the elastic member 33, the elastic member 33 will push the locking pin 31 towards the unlocking position. That is to say, when there is no sufficient centrifugal force acting, the locking pin 31 will not enter the limiting hole 201, and the blade 20 can rotate freely. When the rotational speed of the propeller 100 is greater than the idle speed value of the propeller 100 or the centrifugal force can overcome the elastic force of the elastic member 33, the counterweight 32 can drive the locking pin 31 to move to the locking position, thereby fixing the blade 20.

[0055] In this embodiment, by providing the elastic member 33 in the locking structure 30, the elastic member 33 is connected between the counterweight 32 and the propeller seat 10, and the elastic member 33 is configured to always drive the locking pin 31 to move to the unlocking position, which can effectively ensure the smooth movement of the locking pin 31 between the locking position and the unlocking position, thereby ensuring safety.

[0056] In an embodiment of the present invention, as Figure 2 and Figure 8 shown, the elastic member 33 is a spring and is sleeved on the locking pin 31, and the elastic member 33 is configured to be compressed along the radial direction of the propeller 100.

[0057] For example Figure 2 shown, the spring is sleeved on the locking pin 31 and one end of the spring abuts against the counterweight 32, and the other end of the spring abuts against the propeller seat 10. The structure of the spring is simple, and the elastic force of the spring can directly act on the counterweight 32. The elastic member 33 is configured to be compressed along the radial direction of the propeller 100, so that the elastic member 33 can always drive the locking pin 31 to move to the unlocking position.

[0058] In this embodiment, by setting the elastic member 33 as a spring and sleeving it on the locking pin 31, and the elastic member 33 is configured to be compressed along the radial direction of the propeller 100, the structure of the locking structure 30 can be effectively simplified, space can be effectively saved, and the maintenance difficulty can be reduced, thereby effectively improving the reliability and automation level of the propeller 100.

[0059] In an embodiment of the present invention, as Figures 2-4 shown, a sliding channel 101 is formed on the propeller seat 10, the sliding channel 101 extends along the radial direction of the propeller 100, and the counterweight 32 is slidably disposed in the sliding channel 101.

[0060] For example Figure 3 and Figure 4As shown, the sliding channel 101 is provided on the upper side of the propeller base 10 and opens upward. Further, the projection shape of the sliding channel 101 in the up-down direction can be an oval. The sliding channel 101 has a bottom wall and side walls, and the counterweight 32 can contact the bottom wall and side walls of the sliding channel 101, thereby effectively restricting the movement direction of the counterweight 32, so that the counterweight 32 can only move radially along the propeller 100.

[0061] In this embodiment, by providing the sliding channel 101 on the propeller base 10, the sliding channel 101 extends along the radial direction of the propeller 100, and the counterweight 32 is slidably disposed in the sliding channel 101, which can effectively restrict the movement trajectory of the counterweight 32, ensure that the counterweight 32 can smoothly move radially along the propeller 100, avoid unnecessary swinging or offset, and thus can effectively improve the stability and accuracy of the locking structure 30.

[0062] In an embodiment of the present utility model, as Figures 2-6 shown, a through hole 102 is formed on the propeller base 10. The through hole 102 extends along the radial direction of the propeller 100 and penetrates the inner wall surface of the sliding channel 101 on the side facing the edge of the propeller base 10 in the radial direction of the propeller 100 and the outer peripheral surface of the propeller base 10. The locking pin 31 extends along the radial direction of the propeller 100 and is arranged outside the counterweight 32 in the radial direction of the propeller 100. One end of the locking pin 31 is connected to the counterweight 32, and the other end passes through the through hole 102.

[0063] For example Figure 6 shown, the locking pin 31 can be a rod extending in the left-right direction. For example Figure 2 shown, a fixed connection can be adopted between one end of the locking pin 31 and the counterweight 32, and the locking pin 31 is arranged outside the propeller 100 in the radial direction. For example Figure 4 and Figure 5 shown, the through hole 102 penetrates the propeller base 10 along the radial direction of the propeller 100. One end of the through hole 102 is connected to the sliding channel 101, and the other end of the through hole 102 can be aligned with one end of the limit hole 201 on the blade 20 when the blade 20 is in the deployed position, so that the locking pin 31 can pass through the through hole 102 and insert into or separate from the limit hole 201.

[0064] In this embodiment, by providing a perforation 102 on the propeller base 10, the perforation 102 extends along the radial direction of the propeller 100 and penetrates through the sliding channel 101 to the inner wall surface of the side facing the edge of the propeller base 10 and the outer peripheral surface of the propeller base 10 in the radial direction of the propeller 100. The locking pin 31 extends along the radial direction of the propeller 100 and is arranged outside the counterweight 32 in the radial direction of the propeller 100. One end of the locking pin 31 is connected to the counterweight 32, and the other end passes through the perforation 102, which can effectively limit the movement trajectory of the locking pin 31, ensure that the locking pin 31 can move smoothly along the radial direction of the propeller 100, and avoid unnecessary swinging or deviation, thereby further improving the stability and accuracy of the locking structure 30.

[0065] In an embodiment of the present invention, as Figure 4 and Figure 6 shown, one of the inner wall surface of the locking pin 31 and the perforation 102 is provided with a sliding protrusion 11 and the other is provided with a sliding groove 310, and the sliding protrusion 11 is slidably engaged with the sliding groove 310 along the radial direction of the propeller 100. For example, the sliding protrusion 11 is provided on the inner wall surface of the perforation 102, and the sliding groove 310 is provided on the locking pin 31; or, the sliding protrusion 11 is provided on the locking pin 31, and the sliding groove 310 is provided on the inner wall surface of the perforation 102.

[0066] In a specific example, as Figure 4 and Figure 6 shown, the sliding protrusion 11 is provided on the inner wall surface of the perforation 102, and the sliding groove 310 is provided on the locking pin 31. Further, the number of the sliding grooves 310 is multiple, and the multiple sliding grooves 310 are arranged at intervals along the circumferential direction of the locking pin 31. For example, the number of the sliding grooves 310 can be two, three, four, five, six or more, and the multiple sliding grooves 310 correspond to the multiple sliding protrusions 11 one by one.

[0067] In a specific example, as Figure 4 and Figure 6 shown, the number of both the sliding protrusion 11 and the sliding groove 310 is two, and the two sliding protrusions 11 are arranged symmetrically before and after on the inner wall surface of the perforation 102, and the two sliding grooves 310 are arranged symmetrically before and after on the locking pin 31. When the locking pin 31 passes through the perforation 102 and moves in the perforation 102, the sliding protrusion 11 can contact the inner wall surface of the sliding groove 310. On the one hand, the sliding protrusion 11 can support the locking pin 31, and on the other hand, the cooperation between the sliding protrusion 11 and the sliding groove 310 can effectively reduce the contact area between the locking pin 31 and the perforation 102.

[0068] In this embodiment, a sliding protrusion 11 is provided on one of the inner wall surfaces of the locking pin 31 and the perforation 102, and a sliding groove 310 is provided on the other. The sliding protrusion 11 is slidably engaged with the sliding groove 310 along the radial direction of the propeller 100, which can effectively support the locking pin 31, ensuring that the locking pin 31 can move along the radial direction of the propeller 100, and further ensuring the accuracy of the movement of the locking pin 31. In addition, it can effectively reduce the friction between the locking pin 31 and the perforation 102, thereby effectively reducing the wear of the locking pin 31 and further effectively increasing the service life of the locking pin 31.

[0069] In an embodiment of the present utility model, as Figure 2 and Figure 7 shown, the counterweight 32 is a counterweight ball. The counterweight ball is a spherical object, which can effectively reduce the contact area between the counterweight 32 and the bottom wall and side wall of the sliding channel 101, and can make the centrifugal force more evenly distributed on the surface of the entire sphere, thereby effectively driving the movement of the locking pin 31.

[0070] By setting the counterweight 32 as a counterweight ball in this embodiment, the friction between the counterweight 32 and the bottom wall and side wall of the sliding channel 101 can be effectively reduced, thereby effectively improving the smoothness of the counterweight 32 sliding in the sliding channel 101. In addition, it can also make the counterweight 32 effectively transmit the centrifugal force to the locking pin 31, thereby driving the movement of the locking pin 31. In addition, the counterweight ball has a simple structure and low cost.

[0071] In an embodiment of the present utility model, as Figure 6 、 Figure 7 and Figure 9 shown, the counterweight 32 is provided with a fixing hole 321 and a fastening hole 322. The fixing hole 321 is communicated with the fastening hole 322 and arranged at an angle. One end of the locking pin 31 extends into the fixing hole 321. The locking structure 30 further includes: a fastener 34, and the fastener 34 passes through the fastening hole 322 and is connected to the locking pin 31 to fix the locking pin 31 in the fixing hole 321.

[0072] In a specific example, as Figure 7 shown, the fixing hole 321 penetrates the counterweight 32 in the left-right direction, the fastening hole 322 extends in the up-down direction and is communicated with the fixing hole 321. Further, the extending direction of the fixing hole 321 is perpendicular to the extending direction of the fastening hole 322. For example Figure 6 shown, the upper side surface of the locking pin 31 is a plane. One end of the locking pin 31 extends into the fixing hole 321, and the plane on the upper side of the locking pin 31 is perpendicular to the extending direction of the fastening hole 322. In a specific example, as Figure 9 shown, the fastener 34 can be a machine screw, and the machine screw can be screwed into the fastening hole 322 and press against the plane on the upper side of the locking pin 31, so as to fix the counterweight 32 and the locking pin 31 together.

[0073] In this embodiment, by providing a fixing hole 321 and a fastening hole 322 on the counterweight 32, the fixing hole 321 communicates with the fastening hole 322 and is arranged at an angle. One end of the locking pin 31 extends into the fixing hole 321, which can realize the split design of the locking pin 31 of the counterweight 32, thereby improving the convenience of disassembly and assembly. By providing a fastener 34 in the locking structure 30, the fastener 34 passes through the fastening hole 322 and is connected to the locking pin 31 to fix the locking pin 31 in the fixing hole 321, which can effectively fix the locking pin 31 and the counterweight 32 together, thus effectively ensuring the reliability of the locking structure 30.

[0074] In one embodiment of the present invention, as Figure 1 and Figure 2 shown, the number of the blades 20 is multiple, and the multiple blades 20 are arranged at intervals along the circumferential direction of the blade seat 10. The number of the locking structures 30 is multiple and corresponds to the multiple blades 20 one by one.

[0075] For example, the number of the blades 20 can be two, three, four, five or more than six, and the multiple blades 20 correspond to the multiple locking structures 30 one by one. In a specific example, the number of the blades 20 is two, and the two blades 20 are symmetrically arranged in the circumferential direction of the blade seat 10. The number of the locking structures 30 is two, and the locking structures 30 correspond to the blades 20 one by one.

[0076] In this embodiment, by setting the number of the blades 20 to be multiple, the multiple blades 20 are arranged at intervals along the circumferential direction of the blade seat 10, and the number of the locking structures 30 is multiple and corresponds to the multiple blades 20 one by one, which can make the thrust generated by the propeller 100 more uniform, thereby effectively reducing the possibility that a single blade 20 bears too much load, and further improving the overall efficiency and durability of the propeller 100. In addition, it can also ensure that each blade 20 corresponds to a locking structure 30, thereby effectively improving the overall reliability of the propeller 100.

[0077] The aircraft according to the second aspect embodiment of the present invention includes the propeller 100 and the driving motor 200 according to the first aspect embodiment of the present invention above, and the driving motor 200 is connected to the propeller 100 for driving the propeller 100 to rotate.

[0078] In a specific example, as Figure 1 and Figure 2 shown, the driving motor 200 is arranged on the lower side of the blade seat 10, and the driving motor 200 can provide power for the rotation of the propeller 100. Further, a third connection hole 104 is also provided on the blade seat 10, and the blade seat 10 can be screwed to the driving motor 200 through the third connection hole 104.

[0079] According to the aircraft of the embodiment of the present utility model, by providing the propeller 100 of the first aspect embodiment, when the propeller 100 rotates at a relatively low speed, the counterweight 32 can also drive the locking pin 31 to move to the locking position to fix the blade 20 at the deployed position, thereby effectively improving the stability and efficiency of the propeller 100 during operation.

[0080] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0081] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0082] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0083] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A propeller, characterized in that: include: paddle seat; a propeller blade, the propeller blade being arranged on the propeller seat and being rotatable relative to the propeller seat between a folded position and an extended position, wherein in the folded position, the propeller blade extends along the axial direction of the propeller, and in the extended position, the propeller blade extends along the radial direction of the propeller, and a limiting hole is provided at one end of the propeller blade connected to the propeller seat; A locking structure, which is arranged on the propeller seat and includes a locking pin and a counterweight connected to the locking pin, wherein the locking pin has a locking position and an unlocking position. In the locking position, the locking pin is suitable for fitting into the limiting hole so that the propeller blade is fixed in the deployed position. In the unlocking position, the locking pin is separated from the limiting hole, and the counterweight is configured to drive the locking pin to move to the locking position under the action of the centrifugal force when the propeller rotates.

2. The propeller according to claim 1, characterized in that: The locking structure further includes an elastic member connected between the counterweight and the paddle seat, and the elastic member is configured to always drive the locking pin to move to the unlocking position.

3. The propeller according to claim 2, characterized in that: The elastic member is a spring and is sleeved on the locking pin. The elastic member is configured to be compressed along the radial direction of the propeller.

4. The propeller according to claim 1, characterized in that: A sliding channel is formed on the propeller seat, and the sliding channel extends along the radial direction of the propeller. The counterweight is slidably arranged in the sliding channel.

5. The propeller according to claim 4, characterized in that: The propeller seat is formed with a through hole, the through hole extends in the radial direction of the propeller and penetrates the inner wall surface of the sliding channel on one side facing the edge of the propeller seat in the radial direction of the propeller and the outer peripheral surface of the propeller seat. The locking pin extends in the radial direction of the propeller and is arranged on the outer side of the counterweight in the radial direction of the propeller. One end of the locking pin is connected to the counterweight, and the other end is passed through the through hole.

6. The propeller according to claim 5, characterized in that: One of the locking pin and the inner wall surface of the through hole is provided with a sliding protrusion and the other is provided with a sliding groove, and the sliding protrusion is slidably matched in the sliding groove along the radial direction of the propeller.

7. The propeller according to any one of claims 1 to 6, characterized in that: The counterweight piece is a counterweight ball.

8. The propeller according to any one of claims 1 to 6, characterized in that: The counterweight is provided with a fixing hole and a fastening hole, the fixing hole is connected with the fastening hole and arranged at an angle, one end of the locking pin extends into the fixing hole, The locking structure further includes a fastener, which passes through the fastening hole and is connected to the locking pin to fix the locking pin in the fixing hole.

9. The propeller according to any one of claims 1 to 6, characterized in that: There are multiple blades, and the multiple blades are arranged at intervals along the circumference of the blade seat. There are multiple locking structures, and they correspond one-to-one to the multiple blades.

10. An aircraft, characterized in that: It comprises a propeller and a drive motor according to any one of claims 1 to 9, wherein the drive motor is connected to the propeller for driving the propeller to rotate.

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