WO2018077112A1

WO2018077112A1 - Propeller, power assembly, and unmanned aerial vehicle

Info

Publication number: WO2018077112A1
Application number: PCT/CN2017/106925
Authority: WO
Inventors: 吕航; 李镇良
Original assignee: 深圳市道通智能航空技术有限公司
Priority date: 2016-10-24
Filing date: 2017-10-19
Publication date: 2018-05-03
Also published as: CN206171814U

Abstract

A propeller, a power assembly, and an unmanned aerial vehicle. The propeller (100) is adapted to be threadedly connected to a transmission shaft (8) of a driving means (200) used for driving the propeller (100), and comprises a blade boss (1) and blades (2) disposed on the blade boss (1). The blade boss (1) further comprises a first threaded part (1a), which is adapted to be threadedly connected to a second threaded part (8a) on the transmission shaft (8); the blade boss (1) is further provided with a locking component (3), which is used for preventing the blade boss (1) from rotating relative to the driving means (200) along a direction of loosening from the transmission shaft (8). By providing the locking component (3) on the blade boss (1) of the propeller (100), the blade boss (1) may be prevented from rotating relative to the driving means (200) along a direction of loosening from the transmission shaft (8) of the driving means (200), and thus loosening of the blade boss (1) is avoided, and the occurrence of shaking of the propeller (100) is prevented.

Description

Propeller, power component and drone

Technical field

The present application relates to the field of flight technology, and in particular, to a propeller, a power component, and a drone.

Background technique

In the prior art, the multi-rotor UAV uses a plurality of driving devices at the same time, and each of the driving devices has a propeller mounted on the transmission shaft to provide power for the flight of the UAV. In the flight process of the drone, if a flight attitude such as ascending or descending or tilting deflection is required, the speed of each driving device is adjusted.

Usually, the propeller and the drive shaft of the drive unit are mostly fixed by screwing.

If the UAV frequently adjusts the flight state during operation, the transmission shaft will apply frequent acceleration and deceleration actions to the propeller, which may cause the propeller to reversely rotate in a special case, for example, due to inertia, the propeller is found. unscrew. At this time, the locking force between the propeller and the transmission shaft will be greatly reduced. If the propeller continues to be in the state of frequent acceleration and deceleration, it may be detached from the transmission shaft, and a squeegee (the position between the rotating shaft and the blade occurs). Loose), which in turn causes serious consequences such as flight out of control or crash.

Application content

Therefore, the technical problem to be solved by the present application is to overcome the technical problem that the position between the drive shaft and the propeller of the driving device is prone to looseness in the prior art.

In order to solve the above technical problem, the present application provides a propeller for driving the spiral The drive shaft of the paddle drive is threaded and includes:

a blade head, and a blade disposed on the blade head; wherein the blade head further includes a first screw portion, the first screw portion for the first of the drive shaft Two screw joints;

Also disposed on the blade head is a locking member for preventing rotation of the blade head relative to the drive device in a direction that is unscrewed from the drive shaft.

Further, when the propeller has a tendency to rotate relative to the drive device in a direction loosened from the drive shaft, the locking member abuts the drive device, thereby providing a restriction to the propeller toward A force that is rotated relative to the drive device in a direction that is unscrewed from the drive shaft.

Further, the driving device includes a housing and an outer cover connected to one end of the housing, the locking member having one end connected to the blade head and the other end extending toward the outer cover of the driving device.

Further, the outer cover is provided with a locking portion that is lockedly engaged with the locking member.

Further, the outer cover is formed with a plurality of ribs, the locking portion is formed by the ribs and a gap between adjacent ribs, and the end of the locking member enters the gap, abuts and The adjacent ribs are gapped to provide a force that limits rotation of the propeller relative to the drive in a direction that is unscrewed from the drive shaft, creating a locking action on the propeller.

Further, the locking member enters the gap with a vertical height of 0.5 mm to 1.5 mm.

Further, the locking member is disposed obliquely with respect to a plane in which the bottom of the propeller is located, and the locking member is inclined toward a direction in which the propeller is loosened from the transmission shaft.

Further, the angle of inclination of the locking member with respect to the plane is an acute angle.

Further, the tilt angle is 35 degrees to 55 degrees.

Further, the locking member is connected at one end to the blade head and the other end is extended toward the driving device; when the propeller is rotated relative to the driving device in a direction loosened from the transmission shaft The angle between the extending direction of the locking member and the direction of the linear velocity at the connection point of the locking member and the blade head is an acute angle.

Further, the angle of the angle is from 35 degrees to 55 degrees.

Further, the propeller further has a sliding buckle connected to the blade head, the sliding buckle is fixedly and axially slid along the blade head; one end of the locking component is The sliding buckle is connected, and the sliding buckle can drive the locking member to reciprocate axially along the blade head.

Further, the locking member is in the shape of a rod.

Further, the locking member is an elastic member.

Further, the number of the blades is equal to or greater than two, and is symmetrically disposed on a side of the blade head.

In order to solve the above technical problem, the present application further provides a power assembly including a driving device and a propeller as described above, the driving device including a transmission shaft, a housing, and an outer cover connected to one end of the housing, the driving device passing The drive shaft is threadedly coupled to the propeller for powering rotation of the propeller.

In order to solve the above technical problem, the present application further provides a drone comprising: a fuselage, an arm and a power assembly as described above, the power assembly being coupled to the arm.

This application has the following advantages over the prior art:

The propeller of the present application is provided with a locking member on the blade head for preventing the blade head Rotating relative to the driving device in a direction loosened from the drive shaft of the driving device, thereby avoiding the looseness of the blade head and preventing the occurrence of the propeller paddle situation;

The propeller of the present application is capable of preventing the propeller blade from rotating while the propeller head is prevented from rotating relative to the drive device in a direction loosened from the drive shaft of the drive device. When the blade head is mounted on the drive unit, the installation is guaranteed to be completed smoothly.

DRAWINGS

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the specific embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The drawings are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a schematic structural view of a propeller according to an embodiment of the present application;

2 is a schematic structural view of a power assembly according to an embodiment of the present application, which includes a driving device and a propeller shown in FIG. 1;

Figure 3 is a propeller of Figure 1 shown from another angle showing the first threaded portion included in the blade head;

4 is an enlarged schematic view of the driving device in the power assembly shown in FIG. 2, showing a second screw portion included in the drive shaft, the second screw portion being used for the first screw with the blade head Threaded connection;

FIG. 5 is an enlarged schematic structural view of the locking member of the propeller and its surrounding area in the power assembly shown in FIG. 2. FIG.

Description of the reference signs:

1 - blade head; 1a - first screw; 2 - blade; 3-locking member; 4-rib; 5--gap; 6-shell; 7-outer; 8 - drive shaft; 8a - second Screw joint; 100 – propeller; 200 – drive unit.

detailed description

The technical solutions of the present application are clearly and completely described in the following with reference to the accompanying drawings. It is obvious that the described embodiments are a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. The orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description and the simplified description, and does not indicate or imply that the device or component referred to has a specific orientation, in a specific orientation. Construction and operation are therefore not to be construed as limiting the application. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise specifically defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. The specific meanings of the above terms in the present application can be understood in the specific circumstances for those skilled in the art.

In addition, the technical features involved in the different embodiments of the present application described below are as long as There is no conflict between them and they can be combined with each other.

The propeller provided by the embodiment of the present application has a blade head and a blade, the number of the blades is greater than or equal to two, and is evenly distributed on the side of the blade head, and the rotation axis of the propeller coincides with the axial center line of the blade head. . The propeller can be applied to any technical field involving propellers, and is particularly suitable for the field of drone technology, such as a rotorcraft unmanned aerial vehicle and a tilting rotor unmanned aerial vehicle. Wherein, the rotor unmanned aerial vehicle includes but is not limited to: a single rotor, a double rotor, a quadrotor, or a six-rotor.

The propeller, power assembly and drone provided by the embodiments of the present application are further described below with reference to the accompanying drawings.

Referring to FIG. 1 , a propeller 100 is provided for one of the embodiments of the present application. The propeller 100 is used for screwing with a drive shaft 8 of the driving device 200 shown in FIG. 2 and FIG. 3 , so that the driving device 200 is The propeller 100 provides rotational power, which in turn provides the required lift for flight, such as a drone, through the rotation of the propeller 100.

The propeller 100 includes a blade head portion 1, a blade 2 provided on the blade head portion 1, and a locking member 3 provided on the blade head portion 1.

In order to connect the propeller 100 to the driving device 200 shown in FIG. 2, the blade head 1 of the propeller 100 has a hollow structure, and on the inner wall of the hollow structure, a first screwing portion 1a is provided (see FIG. 3). The first screwing portion 1a corresponds to the second screwing portion 8a (shown in FIG. 4) provided on the transmission shaft 8 of the driving device 200, and the first screwing portion 1a and the second screwing portion are connected. The portion 8a is threaded to secure the propeller 100 to the drive unit 200. In one implementation, the first screw portion 1a disposed on the blade head 1 of the propeller 100 is externally threaded, and the second screw portion 8a disposed on the drive shaft 8 of the driving device 200 is internally threaded. In another implementation, In contrast, the first screwing portion 1a provided on the blade head portion 1 of the propeller 100 is internally threaded, and the second screwing portion 8a provided on the transmission shaft 8 of the driving device 200 is externally threaded.

Since the UAV frequently adjusts its flight state during operation, the transmission shaft 8 applies frequent acceleration and deceleration actions to the propeller 100, which may cause a slight rotation of the propeller 100 in a special case, for example, Due to the inertial action, the blade head 1 of the propeller 100 is rotated relative to the drive unit 200 in a direction that is unscrewed from the drive shaft 8. At this time, the locking force between the propeller 100 and the propeller shaft 8 will be greatly reduced. If the propeller 100 continues to be in a state of frequent acceleration and deceleration, it is possible to disengage from the propeller shaft 8, and a propeller is generated, which in turn causes, for example, an aircraft. Serious consequences such as loss of control or crash. Since the propeller of the present application is provided with the locking member 3 on the blade head 1, it is possible to provide a restriction when the propeller 100 has a tendency to rotate relative to the driving device 200 in a direction loosened from the transmission shaft 8 of the driving device 200. The loosening force prevents the blade head 1 from rotating relative to the drive unit 200 in a direction that is unscrewed from the drive shaft 8 of the drive unit 200, thereby avoiding the phenomenon that the propeller is loose or even paddle.

As shown in FIG. 2 , a schematic structural diagram of a power assembly 300 according to an embodiment of the present application includes a propeller 100 in the above embodiment and a driving device 200 screwed to the propeller 100 .

Wherein, the driving device 200 can be a driving motor or other power structure.

When the propeller 100 has a tendency to be driven relative to the drive device 200 in a direction loosened from the drive shaft 8 of the drive device 200, the locking member 3 of the propeller 100 abuts the drive device 200, thereby providing a limitation The force with which the propeller 100 rotates relative to the drive unit 200 in the direction of loosening.

Further, the driving device 200 includes a casing 6 and an outer side connected to one end of the casing 6. Cover 7. When the driving device 200 is an outer rotor type motor, the outer casing 6 and the outer cover 7 and permanent magnets (not shown) provided on the inner surface of the outer casing 6 together constitute a rotor of the driving device, and the stator capacity of the driving device 200 Positioned inside the outer casing 6, the outer casing 6 of the rotor is rotatable about the stator under the action of a magnetic field, thereby generating a rotational force for driving the propeller 100.

Specifically, one end of the locking member 3 is connected to the blade head 1 and the other end extends toward the outer cover 7 of the driving device 200. The outer cover 7 of the driving device 100 is further provided with a locking portion that is lockingly engaged with the locking member 3, so that when the propeller 100 has a tendency to loosen, the end portion of the locking member 3 can abut against the driving device 200, thereby A force is provided that limits the propeller 100 from rotating relative to the drive unit 200 from the drive shaft 8 of the drive unit 200.

As shown in Figures 4 and 5, it is further illustrated how the drive unit 200 cooperates with the locking member 3 to exert a locking action that limits the loosening of the propeller 100.

Specifically, the outer cover 7 of the driving device 200 is formed with a plurality of ribs 4, and the locking portion of the driving device 200 has the plurality of ribs 4 and a gap 5 between the adjacent ribs 4. The end of the locking member 3 enters the gap 5, abutting the rib 4 adjacent to the gap 5, thereby providing a force that limits the rotation of the propeller 100 relative to the drive unit 200 in a direction that is unscrewed from the drive shaft 8, preventing the propeller 100 from rotating. The rotation of the propeller 100 is prevented relative to the rotation of the driving device 200, that is, the loosening of the propeller 100 is prevented. In a specific embodiment, the locking portion may also be in other forms such as a rough structure provided on the end surface of the rotor or the like.

As can be seen from the figure, the locking member 3 is inclined with respect to the plane of the bottom of the propeller 100, and the setting direction of the locking member 3 is inclined toward the direction in which the propeller 100 is unscrewed from the propeller shaft 8. The angle of inclination of the locking member 3 with respect to the plane is an acute angle. In a preferred embodiment, the angle is from 35 to 55 degrees. If the angle of inclination is too large, it will cause the lock during the tightening process. The deformation of the fixed part is too large, and the strength of the reverse lock is insufficient; if the inclination angle is too small, an effective elastic function cannot be formed, and the necessary cross-sectional area of the lock member cannot be ensured.

Specifically, with the present embodiment, when viewed from the top of the propeller 100, when the propeller 100 rotates counterclockwise, the propeller 100 is released from the driving device 200. In other words, returning to FIG. 5, the line at the connection point of the locking member 3 and the blade head 1 when the propeller 100 is rotated relative to the driving device 200 in the direction of loosening (counterclockwise direction when the propeller 100 is viewed in plan) The direction of the velocity v is the direction indicated by the arrow in the figure, and at this time, it can be seen that the angle between the extending direction of the locking member 3 and the direction of the linear velocity v is an acute angle. In a preferred embodiment, the angle is from 35 to 55 degrees.

The locking member 3 is disposed at such an angle, and the technical effect is that when the propeller 100 is gradually loosened in the counterclockwise direction, the end of the locking member 3 abuts against the tendon 4, restricting the screw 100 from loosening; conversely, when When the propeller 100 is gradually tightened in the clockwise direction, since the distal end of the locking member 3 is no longer abutted against the tendon 4, the propeller 100 can smoothly continue to be gradually tightened in the clockwise direction without being affected by the locking member 3.

In a preferred embodiment, the locking member 3 has a certain elasticity, which has the beneficial effect that when the propeller 100 is gradually tightened clockwise, the locking member 3 slides on the surface of the tendon 4, and can smoothly pass the touched tendon 4, The locking action is not formed on the propeller 100, and does not affect the continued rotation of the propeller 100; when the propeller 200 is gradually loosened counterclockwise, the locking member 3 is located in the gap 5, and the nearest tendon 4 abuts the end of the locking member 3, preventing the propeller The rotation of 100 prevents the looseness between the propeller 100 and the drive unit 200. At the same time, since the locking member 3 has a certain elasticity, the locking member 3 exerts a locking effect on the propeller 100, and does not cause breakage and damage due to excessive hardness.

Therefore, in the embodiment of the present application, due to the special orientation of the locking member 3, it is ensured that the propeller 100 can be smoothly mounted to the driving device 200, and the blade head 1 of the propeller 100 is prevented from moving toward the device. The direction in which the drive shaft 8 of the drive unit 100 is loosened is rotated relative to the drive unit 200.

It should be understood that the inclination direction of the locking member 3 provided depends on the configuration of the first screw portion 1a of the blade head 1 and the second screw portion 8a of the transmission shaft 8. That is, when the propeller 100 is rotated in the counterclockwise direction when the propeller 100 is viewed in plan, the inclination direction of the locking member 3 should be set to coincide with the oblique direction shown in FIG. 5, that is, as shown in FIG. The angle between the directions indicated by the linear velocity v is an acute angle; and when the propeller 100 is rotated in the clockwise direction when the propeller 100 is viewed from the top, the inclination direction of the locking member 3 should be set to be the same as in FIG. The inclination direction is opposite, that is, the angle between the direction indicated by the reverse extension line of the linear velocity v shown in Fig. 5 is an acute angle.

In an embodiment, the locking member 3 may be in the shape of a rod having one end connected to the blade head 1 and the other end extending toward the outer cover 6 of the drive unit 200. In a particular embodiment, the locking member 3 can also be tapered or otherwise shaped.

In a preferred embodiment, the vertical height of the locking member 3 into the gap 5 is from 0.5 mm to 1.5 mm. As shown in FIG. 5, the vertical height of the locking member 3 into the gap 5 is h, that is, h ranges from 0.5 mm to 1.5 mm. When h is too large, the self-locking range is too wide. During each tightening of the propeller 100, the locking member 3 will take on too many elastic deformations, and the process of manually pressing the locking member 3 when the propeller 100 is loosened is more Long, the service life will be reduced; when the vertical height h entered is too small, the action area is too small to effectively achieve the reverse lock function.

During the installation of the propeller 100, the locking member 3 and the driving device 200 are started when the installation is started. The end surface of the outer cover 7 is far away, and the process is the same as the conventional installation; as the tightening process advances, the locking member 3 gradually approaches the end surface of the outer cover 7; at the end of the installation process, the locking member 3 begins and covers the outer cover The tendons 4 on the 7 are in contact with a slight compression, and as they pass the gap 5 between the adjacent tendons 4, they return to their original shape and eventually reach the fully tightened position. At this time, if the propeller 100 is biased in the loosening direction, the end of the locking member 3 will automatically abut the nearest tendon 4, so that the propeller 100 cannot be rotated; the locking member 3 must be pushed upward by the human body so that the end of the locking member 3 is high. At the end face of the rib 4, and simultaneously unscrewing the propeller 100, the continuation can be continued.

In the propeller provided by another embodiment of the present application, there is further provided a sliding buckle (not shown) connected to the blade head of the propeller, and the sliding buckle can be along the circumference of the blade head Sliding in a fixed and axial direction, that is, the sliding buckle can only slide axially along the blade head and cannot rotate in the circumferential direction. One end of the locking member of the propeller is coupled to the sliding buckle, and the sliding buckle can drive the locking member to reciprocate axially along the blade head. At this time, when the propeller is installed, the sliding buckle can be slid upward, and the sliding buckle drives the locking component to move upward and away from the driving device. At this time, the propeller can be freely rotated; when the propeller is rotated and installed, the sliding buckle is artificially slid and locked. The component is moved down by the slide buckle and inserted into the gap of the outer cover of the drive motor to complete the locking action. At this time, the locking member may also be disposed perpendicular to the outer cover of the driving device. In a specific embodiment, the locking member may also be a non-elastic member. When the sliding buckle is moved up to move the locking member away from the outer cover end, the sliding buckle is automatically locked at this time, and the sliding buckle does not slide after the hand is released. When the sliding buckle is moved down to make the locking member enter the gap to form a lock, the sliding buckle is automatically locked at this time, so that the locking member does not get bumped up and down from the gap during the rotation, causing the problem that the locking cannot be continued.

One embodiment of the present application also provides a power assembly 300, as shown in FIG. The force assembly 300 includes a drive unit 200 and a propeller 100 in any of the above embodiments. The propeller 100 is mounted on the drive unit 200, and the drive unit 200 drives its blades 2 to rotate. Wherein, the driving device 200 can be any type of motor. In addition, in FIG. 2, the power assembly 300 includes the propeller 100 as an example, but it does not constitute a limitation on the embodiment of the present application.

In addition, it can be understood that the power assembly 300 provided by the embodiment has the structural features and corresponding beneficial effects of the propeller 100. For technical details not thoroughly described in this embodiment, reference may be made to the above embodiments.

One embodiment of the present application also provides a drone comprising a fuselage, an arm and a power assembly as described above, the power assembly being coupled to the arm.

In this embodiment, the components and functions of the power component included in the drone may refer to some or all of the contents described in the above embodiments. The drone equipped with the power component can effectively prevent the blade head of the propeller from rotating relative to the driving device in a direction of loosening from the driving shaft of the driving device when the driving device drives the propeller to frequently accelerate and decelerate rotation, thereby avoiding Looseness between the blade head of the propeller and the drive unit eliminates the possibility of propeller paddles.

In general, different from the prior art, the propeller provided by the present application is provided with a locking member on the blade head so as to rotate relative to the driving device in a direction in which the propeller is unscrewed from the drive shaft of the driving device. The tendency to provide a force that limits its loosening, thereby preventing the blade head from rotating relative to the drive in a direction that is unscrewed from the drive shaft of the drive, avoiding blade heading The loosening situation prevents the propeller squeegee from happening. In addition, due to the special angle provided by the locking member, it is possible to prevent the blade head from rotating relative to the drive unit in a direction that is unscrewed from the drive shaft of the drive unit after the propeller is mounted. At the same time, it is also possible to ensure that the installation can be smoothly performed when the blade head of the propeller is mounted on the driving device.

It should be noted that the preferred embodiments of the present application are given in the specification of the present application and the accompanying drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. These examples are not intended to be limiting of the scope of the application, which is intended to provide a more thorough understanding of the disclosure of the present application. Further, each of the above technical features is further combined with each other to form various embodiments that are not enumerated above, and are considered to be within the scope of the specification of the present application; further, those skilled in the art can improve or change according to the above description. All such improvements and modifications are intended to fall within the scope of the appended claims.

Claims

A propeller (100) for threading a drive shaft (8) of a drive unit (200) for driving the propeller (100), characterized by comprising:

a blade head (1), and a blade (2) disposed on the blade head (1); wherein the blade head (1) includes a first screw portion, the first screw a joint for screwing with the second screw of the drive shaft (8);

The blade head (1) is further provided with a locking member (3) for preventing the blade head (1) from being screwed from the transmission shaft (8) The loose direction rotates relative to the drive unit (200).
The propeller (100) according to claim 1, wherein said propeller (100) has a rotation relative to said drive unit (200) in a direction that is unscrewed from said drive shaft (8) In the trend, the locking member (3) abuts the drive device (200), thereby providing a restriction to the direction in which the propeller (100) is unscrewed from the drive shaft (8) relative to the drive The force of rotation of the device (200).
A propeller (100) according to claim 1 wherein:

The driving device (200) comprises a casing (6) and an outer cover (7) connected to one end of the casing (6), one end of the locking member (3) is connected to the blade head (1), and One end extends towards the outer cover (7) of the drive unit (200).
The propeller (100) according to claim 3, characterized in that the outer cover (7) is provided with a locking portion that is in locking engagement with the locking member (3).
The propeller (100) according to claim 4, characterized in that the outer cover (7) is formed with a plurality of tendons (4), the locking portions being surrounded by the tendons (4) and adjacent tendons ( 4) The gap (5) is formed, the end of the locking member (3) enters the gap (5), abuts the rib (4) adjacent to the gap (5), thereby providing a restriction The propeller (100) forms a locking action on the propeller (100) against a force that is rotated relative to the drive unit (200) in a direction that is unscrewed from the drive shaft (8).
The propeller (100) according to claim 5, characterized in that the vertical height of the locking member (3) entering the gap (5) is from 0.5 mm to 1.5 mm.
The propeller (100) according to claim 1, wherein the locking member (3) is disposed obliquely with respect to a plane in which the bottom of the propeller (100) is located, and the locking member (3) faces the The propeller (100) is inclined from the direction in which the drive shaft (8) is unscrewed.
The propeller (100) according to claim 7, characterized in that the angle of inclination of the locking member (3) with respect to the plane is an acute angle.
The propeller (100) according to claim 8, wherein the inclination angle is 35 degrees to 55 degrees.
A propeller (100) according to claim 1 wherein:

One end of the locking member (3) is connected to the blade head (1), and the other end extends toward the driving device (200);

When the propeller (100) is rotated relative to the driving device (200) in a direction loosened from the transmission shaft (8), the extending direction of the locking member (3) and the locking member ( 3) The angle between the direction of the linear velocity at the connection point of the blade head is an acute angle.
The propeller (100) according to claim 10, wherein the angle of the angle is from 35 degrees to 55 degrees.
The propeller (100) according to any one of claims 1-11, characterized in that the propeller (100) further has a sliding buckle, the sliding buckle being connected to the blade head (1), the sliding a buckle is fixedly and axially slid along the blade head (1); one end of the locking member (3) is coupled to the sliding buckle, and the sliding buckle can drive the locking member (3) along the paddle The leaf head (1) reciprocates axially.
The propeller (100) according to claim 1, characterized in that the locking member (3) is rod-shaped.
The propeller (100) according to claim 1, characterized in that the locking member (3) is an elastic member.
The propeller (100) according to claim 1, characterized in that the number of the blades (2) is equal to or greater than two, symmetrically disposed on a side of the blade head (1).
A power assembly (300), comprising: a drive device (200) and a propeller (100) according to any of claims 1-15, the drive device (200) comprising a drive shaft (8), a casing (6) and an outer cover (7) connected to one end of the casing (6), wherein the driving device (200) is screwed to the propeller (100) through the transmission shaft (8) for The rotation of the propeller (100) provides power.
A drone characterized by comprising: a fuselage, an arm and a power assembly (300) according to claim 16, the power assembly (300) being coupled to the arm.