CN112996721A

CN112996721A - Screw, driving system and unmanned vehicles

Info

Publication number: CN112996721A
Application number: CN201980052882.7A
Authority: CN
Inventors: 都涛; 陈鹏
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-06-18
Also published as: WO2021134590A1

Abstract

A propeller (100), a power system and an unmanned aerial vehicle, the propeller (100) is used for being detachably connected with a motor (200), and the propeller comprises: a blade assembly (10) comprising at least two blades (11) and a blade clip (12) for connecting the at least two blades (11) together; the mounting seat (20), the mounting seat (20) is detachably connected with the paddle clamp (12), and the mounting seat (20) is detachably connected with the motor (200) through a connecting piece (30) and rotates along with the rotor (201) of the motor (200); the mounting seat (20) comprises a base (21) and a limiting shaft (22) arranged in the middle of the base (21), the limiting shaft (22) is basically perpendicular to the base (21), a limiting concave portion is arranged on the paddle clamp (12), and the limiting shaft (22) is matched with the limiting concave portion and used for preventing the paddle component (10) from swinging along the radial direction. The propeller (100) can be mounted on the motor (200) without an extending shaft, and the mounting adaptability of the propeller (100) is improved.

Description

Screw, driving system and unmanned vehicles

Technical Field

The embodiment of the invention relates to the technical field of unmanned aerial vehicles, in particular to a propeller, a power system and an unmanned aerial vehicle.

Background

The propeller on the unmanned aerial vehicle is usually required to be connected with a motor, and the propeller rotates together with a motor shaft under the action of the motor.

The paddle of screw generally belongs to the consumable article, needs user's oneself dismouting to change the paddle when the paddle damages. Therefore, the paddle is required to be convenient to disassemble and assemble, and after the paddle is assembled, the paddle is not easy to shoot. For a motor with an extension shaft, the paddle is sleeved on the extension shaft of the motor and can coaxially rotate along with the extension shaft of the motor, but for a motor without the extension shaft, the paddle is easy to deflect.

Disclosure of Invention

In order to overcome the defects in the prior art, embodiments of the present invention provide a propeller, a power system, and an unmanned aerial vehicle.

An aspect of an embodiment of the present invention provides a propeller detachably connected to a motor, including:

a blade assembly comprising at least two blades and a blade clamp for connecting the at least two blades together;

the mounting seat is detachably connected with the paddle clamp and is used for being detachably connected with the motor through a connecting piece and rotating along with a rotor of the motor;

the mounting base comprises a base and a limiting shaft arranged in the middle of the base, the limiting shaft is basically perpendicular to the base, a limiting concave portion is arranged on the paddle clamp, and the limiting shaft is matched with the limiting concave portion and used for blocking the paddle component to swing along the radial direction.

A second aspect of an embodiment of the present invention provides a power system, including a motor, a first propeller, and a second propeller; the motor comprises a rotor, wherein the rotor is provided with a mounting surface and a connecting part positioned on the mounting surface; the connecting part is used for being matched with a connecting piece so that the rotating surface can be selectively provided with the first propeller or the second propeller;

the first propeller comprises at least two blades;

the second propeller comprises a blade assembly and a mounting seat, the blade assembly comprises at least two blades and a blade clamp for connecting the at least two blades together, and the mounting seat is detachably connected with the blade clamp; the mounting base comprises a base and a limiting shaft arranged in the middle of the base, the limiting shaft is basically perpendicular to the base, the paddle clamp is provided with a limiting concave part, and the limiting shaft is matched with the limiting concave part and used for preventing the paddle component from swinging along the radial direction;

when the first propeller is installed, at least two blades can be respectively and independently detachably installed on the installation surface through a connecting piece and the connecting part and rotate along with the rotor of the motor;

when the second propeller is installed, the installation seat is detachably installed on the installation surface through the connecting piece and the connecting part and rotates along with the rotor of the motor.

A third aspect of an embodiment of the present invention provides an unmanned aerial vehicle, including:

a body;

the power system is arranged on the machine body; and

the controller is arranged on the machine body and is electrically connected with the motor;

wherein the controller controls the working state of the motor to obtain corresponding flight power.

Based on the above, according to the propeller, the power system and the unmanned aerial vehicle provided by the embodiment of the invention, the mounting base is detachably connected with the motor, the limiting shaft is arranged on the mounting base, the propeller clamp is provided with the limiting concave part, and the limiting shaft is matched with the limiting concave part to prevent the blade assembly from swinging along the radial direction, so that the deflection prevention effect of the extension shaft of the common motor is achieved, the propeller can be arranged on the motor without the extension shaft, and the installation adaptability of the propeller is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic view illustrating a state in which a propeller is connected to a motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a motor and a mounting base according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating an installation state of a motor and a mounting base according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a rotor of an electric machine according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a mounting base according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a blade assembly and a blade clamp of a propeller according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a paddle clip according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first propeller according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of an unmanned aerial vehicle according to yet another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, 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. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

Furthermore, the term "coupled" is intended to include any direct or indirect coupling. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices.

It should be understood that the term "and/or" is used herein only to describe an association relationship of associated objects, and means that there may be three relationships, for example, a1 and/or B1, which may mean: a1 exists alone, A1 and B1 exist simultaneously, and B1 exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Example one

Fig. 1 is a schematic view illustrating a state in which a propeller is connected to a motor according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a motor and a mounting base according to an embodiment of the present invention; fig. 3 is a schematic view illustrating an installation state of a motor and an installation base according to an embodiment of the present invention. Referring to fig. 1 to 3, the present embodiment provides a propeller 100 for detachably connecting with a motor 200. The propeller 100 includes: a blade assembly 10 and a mount 20. The blade assembly 10 is capable of being rotated by a power plant to provide flight power, and the mount 20 serves as an intermediate member for connecting the blade assembly 10 with the motor 200.

The blade assembly 10 comprises at least two blades 11, and a blade clip 12 for connecting the at least two blades 11 together. When two blades 11 are included, the two blades 11 may be arranged in a line, and when more than two blades 11 are included, the blades 11 may be uniformly distributed around the blade clamp 12, for example, three blades 11, and the included angle between the blades 11 may be 120 °. The paddle clip 12 may include an upper paddle clip 121 and a lower paddle clip 122, the upper paddle clip 121 and the lower paddle clip 122 may be detachably docked after being docked, the paddle 11 may be clamped between the upper paddle clip 121 and the lower paddle clip 122, and the upper paddle clip 121, the paddle 11, and the lower paddle clip 122 may be detachably connected together through a connector, so as to facilitate installation and replacement of the paddle 11.

The mounting seat 20 is detachably connected with the paddle clamp 12, and the mounting seat 20 is detachably connected with the motor 200 through the connecting piece 30 and rotates along with the rotor 201 of the motor 200.

The mounting base 20 comprises a base 21 and a limiting shaft 22 arranged in the middle of the base 21, the limiting shaft 22 is basically perpendicular to the base 21, the paddle clamp 12 is provided with a limiting concave portion, and the limiting shaft 22 is matched with the limiting concave portion and used for preventing the paddle component 10 from swinging along the radial direction.

It should be noted that the "limiting shaft" in the present embodiment refers to a limiting member having a rotation axis. It may comprise at least one of: cylindrical shaft, round platform, circular cone. So long as it can be partially inserted into the limiting recess and can prevent the blade assembly 10 from swinging in the radial direction under the limitation of the limiting recess.

It should be noted that the stopper shaft 22 is provided in the middle of the base 21, and the bottom of the stopper shaft 22 is not limited to be directly connected to the middle of the base 21, and the stopper shaft 22 may be connected to the base 21 through an intermediate member, but the stopper shaft 22 is located in the middle of the base 21 with respect to the base 21.

Further, a limit recess may be located in the middle of the paddle clamp 12, and the axis of the limit shaft 22 may coincide with the rotation axis of the motor 200. In this way, the rotation axis of the motor 200 and the rotation axis of the propeller may coincide with the axis of the limiting shaft 22, so that the propeller may be more stable when rotating, and the rotor of the motor 200 may drive the paddle assembly 10 to stably rotate.

Specifically, the mounting seat 20 and the blade clamp 12 may be connected by a quick-release structure or by a threaded fastener, which is not limited in this embodiment.

Fig. 4 is a schematic structural diagram of a rotor of an electric machine according to an embodiment of the present invention; as shown in fig. 3 and 4, the connection member 30 may include at least one of: screws, bolts, and buckles. In this embodiment, it is preferable that the mounting base 20 and the motor 200 are detachably connected to the motor 200 by screws, as shown in fig. 2 and 4, screw holes may be provided on the mounting base 20 and the motor 200, a first screw hole 20a on the mounting base 20 is disposed opposite to a second screw hole 200a on the motor 200, and the mounting base 20 is detachably fixed to the motor 200 by screws passing through the screw holes of the mounting base 20 and the motor 200. Specifically, the number of the connecting members 30 may be at least two, and the connecting members are located at the non-center of the mounting base 20, so that the rotation of the motor 200 may not affect the connection stability between the mounting base 20 and the motor 200, and more preferably, the at least two connecting members 30 are symmetrically or uniformly arranged around the center of the mounting base 20, so that the stress of each connection point between the mounting base 20 and the motor 200 is balanced, which is beneficial to reducing the risk of loosening of the individual connecting members 30 due to unbalanced stress, the mounting base 20 and the motor 200 are fixed and stable, and the rotor of the motor 200 rotates to drive the mounting base 20 to rotate together.

The limiting shaft 22 of the mount 20 may be disposed on a surface of the base 21 away from the motor 200, and an axis of the limiting shaft 22 may be substantially perpendicular to a corresponding mounting surface of the mount 20, so that a rotation plane of the blade assembly 10 is substantially parallel to the mounting surface of the mount 20 after the blade assembly 10 is mounted.

The limiting recess on the paddle holder 12 may be a through hole or a groove as long as the limiting shaft 22 can be inserted. After the limiting shaft 22 is inserted into the limiting concave part, the limiting shaft can completely abut against the inner wall of the limiting concave part in the circumferential direction, so that the blade assembly 10 can be effectively prevented from swinging along the radial direction through the matching of the limiting shaft 22 and the limiting concave part. For the unmanned aerial vehicle, in the flight process of the unmanned aerial vehicle, if the blade assembly 10 of the propeller deflects, the flight balance of the unmanned aerial vehicle is seriously affected, and the unmanned aerial vehicle can not fly according to a preset path, so that the blade assembly 10 can be installed on a motor without an extension shaft through the matching of the limiting shaft 22 of the installation seat 20 and the limiting concave part of the blade clamp 12, and the use safety of the unmanned aerial vehicle is ensured when the blade assembly 10 is installed on the motor without the extension shaft.

The limiting shaft 22 may be directly connected to the base 21, and the connection relationship between the limiting shaft 22 and the base 21 may include at least one of the following: integrative moulding plastics, gluing, welding, joint etc. for preventing that spacing axle 22 from appearing not hard up on base 21, and lead to spacing axle 22's radial spacing function to lose, spacing axle 22 can be connected with base 21 non-detachably through above arbitrary one kind of mode.

In this embodiment, it is most preferable that the base 21 is a plastic part, the limiting shaft 22 is a metal part, and the limiting shaft 22 and the plastic part are fixedly connected together by insert molding. The limiting shaft 22 can be a metal piece with high strength and rigidity, the deformation resistance is high, the structural strength can be effectively guaranteed, the metal limiting shaft 22 is embedded into the melted plastic base material of the base 21 through an injection mold in the forming process, and the limiting shaft 22 can be stably fixed on the base 21 after cooling.

In this embodiment, preferably, the paddle clamp 12 may have a paddle clamp through hole 121 for being sleeved on the outer side of the limiting shaft 22, and the paddle clamp through hole 121 forms a limiting concave portion. The axis of the paddle clamp through hole 121 coincides with the axis of the limiting shaft 22.

In this embodiment, it is preferable that the cross section of the paddle holder through hole 121 and/or the cross section of the stopper shaft 22 is circular. The cross section of the paddle clip through hole 121 and/or the cross section of the limiting shaft 22 are circular, so that the limiting shaft 22 can be smoothly separated from the paddle clip through hole 121 in the process of detaching the paddle clip 12 from the mounting seat 20.

According to the propeller provided by the embodiment of the invention, the mounting base is arranged, the mounting base is detachably connected with the motor, the limiting shaft is arranged on the mounting base, the propeller clamp is provided with the limiting concave part, the limiting shaft is matched with the limiting concave part to prevent the blade assembly from swinging along the radial direction, and the anti-deflection effect of the extension shaft of the common motor is achieved, so that the propeller can be also arranged on the motor without the extension shaft, and the mounting adaptability of the propeller is improved.

Example two

FIG. 5 is a schematic structural diagram of a mounting base according to an embodiment of the present invention; FIG. 6 is a schematic structural view of a blade assembly and a blade clamp of a propeller provided by an embodiment of the invention; fig. 7 is a schematic structural view of a paddle clip according to an embodiment of the present invention. Referring to fig. 1, 5 to 7, in the present embodiment, on the basis of the first embodiment, further, the propeller 100 of the present embodiment further includes a locking mechanism 40, the locking mechanism 40 is used for detachably locking the blade clamp 12 on the mounting base 20, and the locking mechanism 40 includes: a catch 41 and a mating portion 42. Specifically, the paddle clamp 12 and the mounting base 20 are coaxially butted through a limiting shaft 22.

As shown in fig. 6, the retainer 41 is provided on the paddle holder 12. The retaining member 41 may be integrally formed with the blade holder 12 or may be formed separately from the blade holder, and specifically, the retaining member 41 may be formed to extend from the bottom surface of the lower blade holder 122 in a direction away from the upper blade holder 121.

The fitting portion 42 may be provided on the base 21; after the paddle clip 12 and the mounting seat 20 are butted to the preset position, the clamping piece 41 can be rotated into the matching part 42 along the first direction to enter a locking state; the catch 41 can be turned out of the fitting portion 42 in the second direction to enter the unlocked state; wherein the first direction is opposite to the second direction.

Specifically, the concave surface 211 may be formed by recessing downward at a middle position of the base 21, the edge protrusions 212 are disposed at a plurality of positions on the edge of the base 21, and an accommodating space is formed between the edge protrusions 212 and the concave surface 211, the accommodating space forms the engaging portion 42, so that the holding member 41 can extend into the engaging portion 42, and the holding member 41 can be prevented from being separated from the engaging portion 42 along the first direction, and only the holding member 41 can be allowed to be separated from the engaging portion 42 along the second direction.

As shown in fig. 2, the engaging portion 42 may include an open end 421 and a blocking end 422, the open end 421 is used for allowing the holding member 41 to rotate into or out of the engaging portion 42, and the blocking end 422 is used for blocking the holding member 41 from being pulled out from the direction away from the open end 421; the catching member 41 gradually approaches the blocking end 422 during the rotation of the catching member 41 into the mating part in the first direction, and the catching member 41 gradually moves away from the blocking end 422 during the rotation of the catching member 41 out of the mating part 42 in the second direction.

As shown in fig. 2, the clockwise direction is a first direction, and the counterclockwise direction is a second direction, and in some embodiments, the clockwise direction may be set as the first direction, and the counterclockwise direction may be set as the second direction. Preferably, the first direction may be selected according to the rotation direction of the motor 200, so that the first direction is consistent with the rotation direction of the motor 200, and thus the holding member 41 may be prevented from being thrown out of the matching portion 42 to some extent.

The engaging portion 42 further includes a retaining wall 423, the retaining wall 423 is connected to the blocking end 422, and the retaining wall 423 is used for abutting against the retaining member 41 to prevent the retaining member 41 from being pulled out in a direction away from the mounting seat 20 in the axial direction.

The locking mechanism 40 further includes an abutting portion 43, the abutting portion 43 may be formed on the mounting seat 20, and the abutting portion 43 communicates with the open end 421; the docking portion 43 is used for accommodating the retainer 41 during docking of the blade 12 with the mount 20, and when the retainer 41 is accommodated in the docking portion 43, the blade 12 is docked with the mount 20 to a preset position.

In a specific embodiment, a middle protrusion 2111 may be formed protruding from the middle of the concave surface 211 of the base 21, the middle protrusion 2111 may be provided with a connecting member 30 for arranging the mounting seat 20, in this embodiment, as shown in fig. 1 and 2, the middle protrusion 2111 may be cross-shaped, and the end of the middle protrusion is connected to the edge of the base 21, the docking portion 43 may include a groove formed on the mounting seat, the groove may be formed by the distance between the middle protrusion 2111 and the edge protrusion 212, before the paddle clip 12 is docked with the mounting seat 20, the retaining member 41 of the paddle clip 12 first enters the docking portion 43 and then rotates into the mating portion 42 together with the blade assembly 10 along the first direction, and the docking portion 43 is provided to facilitate quick installation and positioning of the paddle clip 12.

Specifically, the edge protrusions 212 disposed at a plurality of positions on the edge of the base 21 may include a top protrusion 2121 and a side protrusion 2122, and the top protrusion 2121 and the side protrusion 2122 may be integrally formed. The top bump 2121 is spaced from the concave surface 211, the bottom wall of the top bump 2121 can form the retaining wall 423, and the side bump 2122 can be connected to the concave surface 211, or can be spaced from the concave surface 211 by a small distance that is insufficient for the retaining member 41 to pass through, and the surface of the side bump 2122 forms the blocking end 422.

In addition, the number of the retainers 41 and the engaging portions 42 in the present embodiment may be at least two. So that the paddle clip 12 and the mount 20 can be more stably fixed. Preferably, the number of the retainers 41 and the matching parts 42 is the same, and the retainers correspond to each other one by one.

For example, the number of the holding members 41 is two, so that the paddle holder 12 forms a two-jaw structure, the two holding members 41 may be symmetrically disposed around the axis of the paddle holder 12, and correspondingly, the two matching portions 42 are symmetrically disposed around the axis of the mounting base 20, it should be noted that, since the paddle holder 12 and the mounting base 20 are relatively radially positioned by the limiting shaft 22, the axis of the paddle holder 12 is coaxial with the axis of the mounting base 20, that is, the axis of the limiting shaft 22. The two retainers 41 are arranged symmetrically about the axis of the stopper shaft 22, and the two engaging portions 42 are arranged symmetrically about the axis of the stopper shaft 22 and are adapted to engage with the retainers 41.

When the retainer 41 includes a plurality of, for example, three, or more than three, the plurality of retainers 41 are uniformly distributed around the axis of the paddle holder 12, and correspondingly, the plurality of matching portions 42 are uniformly distributed around the axis of the mount 20. That is, the plurality of catches 41 are uniformly distributed around the axis of the stopper shaft 22, and the plurality of engaging portions 42 are uniformly distributed around the axis of the stopper shaft 22 and are adapted to engage with the catches 41.

The clamping pieces 41 and the matching parts 42 are symmetrically or uniformly distributed, so that the connection stress between the blade clamp 12 and the mounting base 20 is balanced as much as possible, the rotation of the blade assembly 10 can be reliably kept, and the possibility of blade shooting is effectively reduced.

The blade assembly 10 can be quickly detached from the mounting base 20 through the matching of the clamping piece 41 of the blade clamp 12 and the matching part 42 of the mounting base 20, so that the blade assembly 10 can be quickly separated from the mounting base 20 and the motor 200, and the mounting and dismounting efficiency of the propeller is effectively improved.

As shown in fig. 6, the retaining member 41 may include an intermediate connecting portion 411 and an extending portion 412, one end of the intermediate connecting portion 411 is connected to the paddle holder 12, the other end of the intermediate connecting portion 411 is connected to the extending portion 412, and an included angle is formed between the extending portion 412 and the intermediate connecting portion 411.

Specifically, the intermediate connecting portion 411 may be fixedly connected to the lower blade holder 122 of the blade holder 12, and preferably, the intermediate connecting portion 411 is integrally formed with the lower blade holder 122 and extends from the bottom surface of the lower blade holder 122 in a direction away from the upper blade holder 121, and the intermediate connecting portion 411 may be located at an edge position of the lower blade holder 121 and extends downward from the edge position of the lower blade holder 121 in a direction perpendicular to the bottom surface of the lower blade holder 122. The protruding portion 412 may be disposed at an end of the intermediate connection portion 411, and the protruding portion 412 may form an included angle with the intermediate connection portion 411, the included angle may be 30 ° to 90 °, and preferably, the included angle between the protruding portion 412 and the intermediate connection portion 411 is 90 °, that is, the protruding portion 412 is perpendicular to the intermediate connection portion 411.

The protrusion 412 is configured to protrude into the mating portion 42, and the thickness of the protrusion 412 may be slightly less than the height of the mating portion 42 to facilitate rotation of the protrusion 412 into and out of the mating portion 42.

Preferably, the intruding portion 412 extends radially outward parallel to the restraint shaft 22. To make the extending portion 412 extend outward along the radial direction parallel to the limiting shaft 22, when the middle connecting portion 411 is perpendicular to the lower paddle clip 122, the extending portion 412 needs to be perpendicular to the middle connecting portion 411, and when the middle connecting portion 411 is not perpendicular to the lower paddle clip 122, the extending portion 412 may not be perpendicular to the middle connecting portion 411, as long as the included angle between the extending portion 412 and the middle connecting portion 411 and the included angle between the middle connecting portion 411 and the lower paddle clip 122 are both equal.

In this embodiment, the protruding portion 412 protrudes into the matching portion 42, and the matching portion 42 is formed by the concave surface of the base 21, the top protrusion 2121 and the side protrusion 2122, that is, the protruding portion 412 protrudes into the base 21, so as to lock the blade assembly 10 and the mount 20, and effectively reduce the height of the blade assembly 10. Furthermore, the protruding portion 412 extends outward along a radial direction parallel to the limiting shaft 22, and since the limiting shaft 22 is substantially perpendicular to the base 21, the protruding portion 412 can be inserted into the matching portion 42 along a direction substantially parallel to the base 21, and the height of the matching portion 42 can be substantially equal to or slightly greater than the thickness of the protruding portion 412, compared with a mode that the protruding portion 412 is inserted into the matching portion 42 in an inclined manner, the matching portion 42 does not need to be enlarged for the inclined protruding portion 412 to protrude, so that the space can be effectively saved, and the structure is more compact.

On the basis of the above embodiment, as shown in fig. 3, the propeller of the present embodiment further includes: the elastic member 50. The elastic member 50 is disposed between the paddle holder 12 and the mounting base 20, and the elastic member 50 is used for providing an elastic force to make the holding member 41 hold in the matching portion 42 to maintain a locked state. The elastic member 50 in this embodiment may be an axially-stretchable spring, or alternatively, an elastic member capable of stretching in the axial direction. The elastic member 50 is disposed to improve the locking stability between the retaining member 41 and the engaging portion 42, the retaining member 41 is firmly fixed in the engaging portion 42 under the action of the elastic force, and if the retaining member 41 needs to be disengaged from the engaging portion 42, the elastic force of the elastic member 50 must be overcome and the retaining member 41 must be rotated out in the second direction.

Specifically, one end of the elastic member 50 may be connected to the mounting base 20, and the other end of the elastic member 50 abuts against the paddle holder 12. The elastic member 50 is connected to the mounting seat 20 in a specific manner including at least one of the following: gluing, clamping, interference fit and welding. For example, the elastic member 50 can be firmly fixed by using a melted plastic material to bond with the elastic member 50.

As shown in fig. 3, the elastic member 50 may be disposed in the middle of the mounting seat 20, and the elastic member 50 extends and contracts in the direction of the axis of the limiting shaft 22. Specifically, the axis of the elastic element 50 coincides with the axis of the mounting seat 20, the elastic element 50 can be coaxially sleeved outside the limiting shaft 22, the limiting shaft 22 can play a role in radially limiting the elastic element 50, the elastic element 50 is prevented from radially deflecting, and the elastic element 50 can only axially extend and retract.

In some embodiments, the elastic member 50 may also include a plurality of elastic members 50, and a plurality of elastic members 50 may be disposed around the limiting shaft 22 with the limiting shaft 22 as a center, and the above-mentioned functions may also be achieved.

It will be appreciated that when the number of the elastic members 50 is plural, the rigidity of each elastic member 50 may be slightly lower, and when the number of the elastic members 50 is only one, the rigidity of the elastic member 50 is greater than the rigidity of the plural elastic members 50 to be able to provide a sufficient elastic restoring force so that the holder 41 is firmly held in the fitting portion 42, the locking of the blade assembly 10 with the mount 20 is achieved, so that the propeller is in a stable locked state.

When the pressing force of the paddle clip 12 toward the mount 20 reaches a predetermined value, the retainer 41 can overcome the elastic force of the elastic member 50, and the retainer 41 can be rotated out of the fitting portion 42 in the second direction. The resilient member 50 may gradually compress during docking of the paddle clip 12 with the mount 20 to a predetermined position. In the process of mounting the paddle clamp 12 and the mounting base 20, the paddle clamp 12 approaches the mounting base 20, the elastic member 50 is continuously compressed, when the retaining member 41 of the paddle clamp 12 reaches the preset position on the base 20 (when the retaining member reaches the abutting portion 43), the paddle assembly 10 rotates to the matching portion 42 in the first direction, after the retaining position is reached, the user releases the paddle assembly 10, the elastic member 40 loses the pressing force, the elastic member 40 has a tendency of upward recovery deformation, under the action of the elastic restoring force of the elastic member 40, the retaining member 41 is tightly abutted against the top of the matching portion 42 and is tightly limited in the matching portion 42, and therefore, the arrangement of the elastic member 40 can greatly improve the locking stability between the paddle assembly 10 and the mounting base 20, further greatly improve the use safety of the propeller, and effectively prevent the occurrence of the condition of paddle shooting.

The screw that this embodiment provided through set up spacing axle on the mount pad, presss from both sides the spacing concave part cooperation with the oar, prevents the radial beat of paddle subassembly for the screw of this embodiment can be adapted to the motor that does not have the projecting shaft, has improved the installation adaptability of screw. And the quick disassembly of the propeller can be realized through the locking mechanism, and the disassembly and assembly efficiency of the propeller is improved.

EXAMPLE III

Fig. 8 is a schematic structural diagram of a first propeller according to another embodiment of the present invention; it should be noted that, the propeller shown in fig. 1 is a second propeller, please refer to fig. 1 to fig. 3, and fig. 8, this embodiment provides a power system, which includes a motor 200, a first propeller 100a, and a second propeller 100; the motor 200 comprises a rotor 201, wherein the rotor 201 is provided with a mounting surface 2011 and a connecting part positioned on the mounting surface 2011; the connecting portion is adapted to be fitted with the connecting member 30, thereby enabling the mounting surface 2011 to selectively mount the first propeller 100a or the second propeller 100.

The first propeller 100a includes at least two blades 11 a.

The second propeller 100 comprises a blade assembly 10 and a mounting base 20, wherein the blade assembly 10 comprises at least two blades 11 and a blade clamp 12 for connecting the at least two blades 11 together, and the mounting base 20 is detachably connected with the blade clamp 12; the mounting base 20 comprises a base 21 and a limiting shaft 22 arranged in the middle of the base 21, the limiting shaft 22 is basically perpendicular to the base 21, the paddle clamp 12 is provided with a limiting concave portion, and the limiting shaft 22 is matched with the limiting concave portion and used for preventing the paddle component 10 from swinging along the radial direction.

Wherein, when the first propeller 100a is installed, at least two blades 11a can be detachably installed on the installation surface 2011 independently of each other through the connection member 30 and the rotor 201 of the following motor rotates together. When the second propeller 100 is mounted, the mount 20 is detachably mounted on the mounting surface 2011 through the connection member 30 and the connection portion, and rotates together with the rotor 201 of the motor 200.

In the embodiment shown in fig. 8 and 9, the connection portion of the motor 200 is a screw hole, which may be the first screw hole 200a described in the first embodiment. The corresponding connecting members 30 are screws. Of course, in other embodiments, the connecting portion and the connecting member 30 may be other, for example, the connecting member 30 may be a detachable buckle, the connecting portion may be a fastening hole, etc., as long as the detachable connection of the motor 200 with the mounting base 20 and the blade 11a can be realized.

When the motor 200 is connected with the first propeller 100a, the motor 200 does not need to extend out of the shaft and can be applied to a shaftless motor, and the power system can effectively reduce the weight of the power system due to the fact that a paddle clamp is omitted, further reduce the self weight of the unmanned aerial vehicle and be beneficial to the light weight of the unmanned aerial vehicle. When such a shaftless motor is used, the mount 20 may be directly attached to the mounting surface 2011 of the motor 200, and the propeller with the paddle clip (the second propeller 100) may be detachably attached to the mount 20. Therefore, the power system provided by the embodiment can be provided with two different types of propellers, and the application range of the power system is expanded.

Specifically, the paddle clamp 12 of the second propeller 100 is provided with a paddle clamp through hole 121 for being sleeved on the outer side of the limiting shaft 22, and the paddle clamp through hole 121 forms a limiting concave part; the cross section of the paddle clamp through hole 121 and/or the cross section of the limiting shaft 22 are circular.

The structure and function of the paddle clamp through hole 121 and the limiting shaft 22 are the same as those described in the first embodiment, and reference may be specifically made to the description of the first embodiment, which is not repeated herein.

Further, the limiting recess may be located in the middle of the paddle clamp 12, and the axis of the limiting shaft 22 may coincide with the axis of the motor 200. In this way, the rotation axis of the motor 200 and the rotation axis of the propeller may coincide with the axis of the limiting shaft 22, so that the propeller may be more stable when rotating, and the rotor of the motor 200 may drive the paddle assembly 10 to stably rotate.

Further, the limiting shaft 22 may be directly connected to the base 21, and the connection relationship between the limiting shaft 22 and the base 21 may include at least one of the following: integrative moulding plastics, gluing, welding, joint etc. for preventing that spacing axle 22 from appearing not hard up on base 21, and lead to spacing axle 22's radial spacing function to lose, spacing axle 22 can be connected with base 21 non-detachably through above arbitrary one kind of mode.

The driving system of this embodiment, when motor and second screw installation, the second screw is through setting up the mount pad, and the mount pad can be dismantled with the motor and be connected, sets up spacing axle on the mount pad, has spacing concave part on the oar presss from both sides, and spacing axle and spacing concave part cooperation play the anti-deflection effect of the extension shaft of ordinary motor in order to hinder the paddle subassembly along radial swing to make the screw also can install on the motor that does not have the extension shaft, improved the installation adaptability of screw.

The specific structure and function of the second propeller in this embodiment are the same as those of the propeller in the first embodiment, and specific reference may be made to the description related to the first embodiment, which is not described herein again in this embodiment.

Example four

Referring to fig. 1, 5 to 7, in the present embodiment, on the basis of the third embodiment, further, the second propeller 100 of the present embodiment further includes a locking mechanism 40, the locking mechanism 40 is used for detachably locking the paddle clip 12 on the mounting base 20, and the locking mechanism 40 includes: a catch 41 and a mating portion 42. Specifically, the paddle clamp 12 and the mounting base 20 are coaxially butted through a limiting shaft 22.

As shown in fig. 6, the retaining member 41 may include an intermediate connecting portion 411 and an extending portion 412, one end of the intermediate connecting portion 411 is connected to the paddle holder 12, the other end of the intermediate connecting portion 411 is connected to the extending portion 412, and an included angle is formed between the extending portion 412 and the intermediate connecting portion 411. Preferably, the intruding portion 412 extends radially outward parallel to the restraint shaft 22.

On the basis of the above embodiment, as shown in fig. 3, the propeller of the present embodiment further includes: the elastic member 50. The elastic member 50 is disposed between the paddle holder 12 and the mounting base 20, and the elastic member 50 is used for providing an elastic force to make the holding member 41 hold in the matching portion 42 to maintain a locked state.

Specifically, one end of the elastic member 50 may be connected to the mounting base 20, and the other end of the elastic member 50 abuts against the paddle holder 12. The elastic member 50 is connected to the mounting seat 20 in a specific manner including at least one of the following: gluing, clamping, interference fit and welding.

As shown in fig. 3, the elastic member 50 may be disposed in the middle of the mounting seat 20, and the elastic member 50 extends and contracts in the direction of the axis of the limiting shaft 22.

When the pressing force of the paddle clip 12 toward the mount 20 reaches a predetermined value, the retainer 41 can overcome the elastic force of the elastic member 50, and the retainer 41 can be rotated out of the fitting portion 42 in the second direction. The resilient member 50 may gradually compress during docking of the paddle clip 12 with the mount 20 to a predetermined position.

The specific structure and function of the second propeller in this embodiment are the same as those of the propeller in the second embodiment, and the description of the second embodiment may be specifically referred to, and details are not described in this embodiment.

EXAMPLE five

Fig. 9 is a schematic structural diagram of an unmanned aerial vehicle according to yet another embodiment of the present invention. As shown in fig. 1 to 3, and fig. 8 to 9, the present embodiment provides an unmanned aerial vehicle including: fuselage 300, power system 400, and controller 500. The power system 400 is mounted on the body 300, the controller 500 is mounted on the body 300, and the controller 500 is electrically connected to the motor 200. The controller 500 controls the operation state of the motor 200 to obtain corresponding flight power.

Referring to fig. 1 to fig. 3 and fig. 8, the power system of the unmanned aerial vehicle of the embodiment includes a motor 200, a first propeller 100a and a second propeller 100; the motor 200 comprises a rotor 201, wherein the rotor 201 is provided with a mounting surface 2011 and a connecting part positioned on the mounting surface 2011; the connecting portion is adapted to be fitted with the connecting member 30, thereby enabling the mounting surface 2011 to selectively mount the first propeller 100a or the second propeller 100.

The first propeller 100a includes at least two blades 11 a.

In the embodiment shown in fig. 8 and 9, the connection portions of the motor 200 are screw holes, and the corresponding connection members 30 are screws. Of course, in other embodiments, the connecting portion and the connecting member 30 may be other, for example, the connecting member 30 may be a detachable buckle, the connecting portion may be a fastening hole, etc., as long as the detachable connection of the motor 200 with the mounting base 20 and the blade 11a can be realized.

The unmanned vehicles of this embodiment, when motor and second screw installation, the second screw is through setting up the mount pad, and the mount pad can be dismantled with the motor and be connected, sets up spacing axle on the mount pad, has spacing concave part on the oar presss from both sides, and spacing axle and spacing concave part cooperation play the preventing deflection effect of the extension shaft of ordinary motor in order to hinder the paddle subassembly along radial swing to make the screw also can install on the motor of no extension shaft, improved the installation adaptability of screw.

EXAMPLE six

Referring to fig. 1, 5 to 7, in this embodiment, on the basis of the fifth embodiment, further, the second propeller 100 of this embodiment further includes a locking mechanism 40, the locking mechanism 40 is used for detachably locking the paddle clip 12 on the mounting base 20, and the locking mechanism 40 includes: a catch 41 and a mating portion 42. Specifically, the paddle clamp 12 and the mounting base 20 are coaxially butted through a limiting shaft 22.

In the embodiments of the present invention, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A propeller for detachable connection to a motor, comprising:

2. The propeller of claim 1, wherein the connector comprises at least one of: screws, bolts, and buckles.

3. The propeller according to claim 1, wherein the paddle clamp is provided with a paddle clamp through hole for being sleeved outside the limiting shaft, and the paddle clamp through hole forms the limiting concave part;

the cross section of the paddle clamp through hole and/or the cross section of the limiting shaft are circular.

4. The propeller of claim 1, wherein the stop shaft comprises at least one of: cylindrical shaft, round platform, circular cone.

5. The propeller of claim 1 wherein the stop recess is located in the middle of the paddle clamp, the axis of the stop shaft coinciding with the axis of rotation of the motor.

6. The propeller of claim 1, wherein the connection relationship between the limiting shaft and the base comprises at least one of: injection molding, gluing, welding and clamping.

7. The propeller of claim 1, wherein the base is a plastic piece, the limiting shaft is a metal piece, and the limiting shaft and the plastic piece are fixedly connected together in an insert molding manner.

8. The propeller of claim 1, further comprising a locking mechanism for removably locking the paddle clip to the mount, the locking mechanism comprising:

the clamping piece is arranged on the paddle clamp;

the matching part is arranged on the base; after the paddle clamp is in butt joint with the mounting seat to a preset position, the clamping piece can be rotated into the matching part along a first direction to enter a locking state; the clamping piece can rotate out of the matching part along a second direction to enter an unlocking state; wherein the first direction is opposite to the second direction.

9. The propeller of claim 8, further comprising:

the elastic piece is arranged between the paddle clamp and the mounting seat and used for providing elastic force to enable the clamping piece to be clamped in the matching part so as to maintain the locking state.

10. The propeller of claim 9, wherein one end of the elastic member is connected to the mounting seat, and the other end of the elastic member abuts against the blade clip;

when the pressing force of the paddle clamp towards the mounting seat reaches a preset value, the clamping piece can overcome the elastic force of the elastic piece, and the clamping piece can rotate out of the matching part along the second direction.

11. The propeller of claim 9 wherein said resilient member is progressively compressed during docking of said blade clip with said mount to a predetermined position.

12. The propeller of claim 8 wherein the engagement portion includes an open end for rotation of the catch into and out of the engagement portion and a blocking end for blocking removal of the catch from a direction away from the open end;

the clamping piece is gradually close to the blocking end in the process that the clamping piece rotates into the matching part along the first direction, and the clamping piece is gradually far away from the blocking end in the process that the clamping piece rotates out of the matching part along the second direction.

13. The propeller of claim 12 wherein the mating portion further comprises a retaining wall connected to the blocking end, the retaining wall configured to abut against the retaining member to prevent the retaining member from being removed in a direction axially away from the mounting base.

14. The propeller of claim 12, wherein the locking mechanism further comprises an abutment formed on the mount, the abutment communicating with the open end;

the butt joint part is used for accommodating the clamping piece in the butt joint process of the paddle clamp and the mounting seat, and when the clamping piece is accommodated in the butt joint part, the paddle clamp and the mounting seat are in butt joint to a preset position.

15. The propeller of claim 14 wherein the interface comprises a recess formed on the mount.

16. The propeller of claim 8, wherein the retaining member comprises a middle connecting portion and an extending portion, one end of the middle connecting portion is connected to the paddle clip, the other end of the middle connecting portion is connected to the extending portion, and an included angle is formed between the extending portion and the middle connecting portion.

17. The propeller of claim 16 wherein said extensions extend radially outwardly parallel to said retention shaft.

18. The propeller of claim 8 wherein the number of said retainers and said engagement portions is the same and corresponds one to one.

19. The propeller of claim 18 wherein the number of retainers and engaging portions is at least two.

20. The propeller of claim 19 wherein the retaining member comprises two retaining members, two of the retaining members are symmetrically disposed about an axis of the blade clamp, and correspondingly, two of the engagement portions are symmetrically disposed about an axis of the mounting base.

21. The propeller of claim 19 wherein the retaining member comprises a plurality of retaining members evenly distributed about an axis of the blade holder, and correspondingly, a plurality of engaging portions evenly distributed about an axis of the mount.

22. The propeller of claim 9, wherein the resilient member is coupled to the mounting base in a manner that includes at least one of:

gluing, clamping, interference fit and welding.

23. The propeller of claim 8, wherein the elastic member is disposed at a middle position of the mounting base, and the elastic member extends and retracts in a direction along an axis of the limiting shaft.

24. A power system is characterized by comprising a motor, a first propeller and a second propeller; the motor comprises a rotor, wherein the rotor is provided with a mounting surface and a connecting part positioned on the mounting surface; the connecting part is used for being matched with a connecting piece so that the rotating surface can be selectively provided with the first propeller or the second propeller;

the first propeller comprises at least two blades;

25. The power system of claim 24, wherein the connection comprises at least one of: screws, bolts, and buckles.

26. The power system according to claim 24, wherein the paddle clamp is provided with a paddle clamp through hole for being sleeved outside the limiting shaft, and the paddle clamp through hole forms the limiting concave part;

27. The power system of claim 24, wherein the limit shaft comprises at least one of: cylindrical shaft, round platform, circular cone.

28. The power system of claim 27, wherein the limiting recess is located in the middle of the paddle clamp, and an axis of the limiting shaft coincides with an axis of the motor.

29. The power system of claim 24, wherein the connection relationship between the limit shaft and the base comprises at least one of: injection molding, gluing, welding and clamping.

30. The power system according to claim 24, wherein the base is a plastic part, the limiting shaft is a metal part, and the limiting shaft and the plastic part are fixedly connected together by means of insert molding.

31. The power system of claim 24, wherein the second propeller removably locks a paddle clip to a mount via a locking mechanism, the locking mechanism comprising:

the clamping piece is arranged on the paddle clamp;

32. The power system of claim 31, wherein the second propeller further comprises:

33. The power system of claim 32, wherein one end of the elastic member is connected to the mounting base, and the other end of the elastic member abuts against the paddle clip;

34. The power system of claim 32, wherein the resilient member is progressively compressed during docking of the paddle clip with the mount to a predetermined position.

35. The powered system of claim 31 wherein the engaging portion includes an open end for allowing the catch to rotate into and out of the engaging portion and a blocking end for blocking the catch from exiting in a direction away from the open end;

36. The power system of claim 35, wherein the mating portion further comprises a retaining wall connected to the blocking end, the retaining wall configured to abut against the retaining member to prevent the retaining member from being removed in a direction axially away from the mounting base.

37. The power system of claim 35, wherein the locking mechanism further comprises an abutment formed on the mount and in communication with the open end;

38. The power system of claim 37, wherein the interface comprises a recess formed on the mount.

39. The power system of claim 31, wherein the retaining member includes a middle connecting portion and an extending portion, one end of the middle connecting portion is connected to the paddle clamp, the other end of the middle connecting portion is connected to the extending portion, and an included angle is formed between the extending portion and the middle connecting portion.

40. The power system of claim 39, wherein the intruding portion extends radially outward parallel to the limit shaft.

41. The power system of claim 31, wherein the number of the retainers and the engaging portions is the same, and corresponds to one another.

42. The powered system of claim 41 wherein the number of catches and engaging portions is at least two.

43. The power system as claimed in claim 42, wherein the holding member comprises two holding members, two holding members are symmetrically arranged around the axis of the blade clamp, and correspondingly, two matching parts are symmetrically arranged around the axis of the mounting seat.

44. The power system of claim 42, wherein the retaining member comprises a plurality of retaining members, the plurality of retaining members are evenly distributed around the axis of the blade clamp, and correspondingly, the plurality of matching parts are evenly distributed around the axis of the mounting seat.

45. The powertrain system of claim 32, wherein the resilient member is coupled to the mount in a manner that includes at least one of:

gluing, clamping, interference fit and welding.

46. The power system of claim 32, wherein the elastic member is disposed at a middle position of the mounting seat, and the elastic member extends and retracts in a direction along an axis of the limiting shaft.

47. The power system of claim 31, wherein the direction of rotation of the motor is the first direction.

48. An unmanned aerial vehicle, comprising:

a body;

the power system of claim 24 mounted on the fuselage; and

49. The UAV according to claim 48,

the controller comprises a flight controller and an electronic speed regulator, the flight controller is electrically connected with the electronic speed regulator, the electronic speed regulator is electrically connected with the motor, the flight controller sends a control command to the electronic speed regulator, and the electronic speed regulator is used for driving the motor to rotate and regulating the rotating speed of the motor according to the control command.

50. The UAV of claim 49 wherein the connector comprises at least one of: screws, bolts, and buckles.

51. The unmanned aerial vehicle of claim 49, wherein the paddle clamp has a paddle clamp through hole for fitting over an outer side of the limiting shaft, the paddle clamp through hole forming the limiting recess;

52. The UAV of claim 48 wherein the restraint shaft comprises at least one of: cylindrical shaft, round platform, circular cone.

53. The UAV of claim 52 wherein the limiting recess is located in the middle of the paddle clamp, and the axis of the limiting shaft coincides with the axis of the motor.

54. The UAV of claim 48 wherein the connection between the restraint shaft and the base comprises at least one of: injection molding, gluing, welding and clamping.

55. The UAV of claim 48 wherein the base is a plastic part and the shaft is a metal part, the shaft and the plastic part being fixedly connected by insert molding.

56. The UAV of claim 48 wherein the second propeller detachably locks a paddle clip to a mount via a locking mechanism comprising:

the clamping piece is arranged on the paddle clamp;

57. The unmanned aerial vehicle of claim 56, wherein the second propeller further comprises:

58. The UAV of claim 57 wherein one end of the spring is connected to the mount and the other end of the spring abuts the paddle clip;

59. The UAV of claim 57 wherein the spring is gradually compressed during docking of the paddle clip with the mount to a predetermined position.

60. The UAV of claim 56 wherein the mating portion includes an open end for rotation of the catch into and out of the mating portion and a blocking end for blocking the catch from exiting in a direction away from the open end;

61. The UAV of claim 60 wherein the mating portion further comprises a retaining wall connected to the blocking end, the retaining wall configured to abut against the retaining member to prevent the retaining member from moving axially away from the mounting base.

62. The UAV of claim 60 wherein the locking mechanism further comprises an interface formed on the mount and in communication with the open end;

63. The UAV of claim 62 wherein the interface comprises a recess formed on the mount.

64. The UAV of claim 56, wherein the retaining member comprises an intermediate connecting portion and an extending portion, one end of the intermediate connecting portion is connected to the paddle clamp, the other end of the intermediate connecting portion is connected to the extending portion, and an included angle is formed between the extending portion and the intermediate connecting portion.

65. The UAV of claim 64 wherein the intruding portion extends radially outward parallel to the restraint axis.

66. The UAV of claim 56 wherein the number of catches and the number of engagement portions are the same and correspond one to one.

67. The UAV of claim 66 wherein the number of catches and engagements is at least two.

68. The UAV of claim 67 wherein the number of retainers is two, and the two retainers are symmetrically disposed about the axis of the paddle clamp, and the two mating portions are symmetrically disposed about the axis of the mount.

69. The UAV of claim 67 wherein the plurality of retainers includes a plurality of retainers evenly distributed about the axis of the paddle clamp, and the corresponding plurality of engaging portions are evenly distributed about the axis of the mount.

70. The UAV of claim 57 wherein the elastic member is coupled to the mount in a manner that includes at least one of:

gluing, clamping, interference fit and welding.

71. The unmanned aerial vehicle of claim 57, wherein the resilient member is disposed at a central location of the mounting base, and the resilient member extends and retracts in a direction along which an axis of the limiting shaft is located.

72. The UAV of claim 56 wherein the direction of rotation of the motor is the first direction.