WO2018161646A1 - Propeller protection apparatus, arm, and unmanned aerial vehicle - Google Patents

Abstract

A propeller protection apparatus (130), an arm (120), and an unmanned aerial vehicle (100). The propeller protection apparatus (130) comprises a protective rod (132), a connecting rod (134), and a holding portion (136). One end of the connecting rod (134) is connected to the protective rod (132), and the holding portion (136) is connected to the other end of the connecting rod (134). The holding portion (136) is provided with a position-limiting member (180). The unmanned aerial vehicle (100) comprises the arm (120), the propeller protection apparatus (130), and a propeller (150). The arm (120) is provided with a position-limiting hole (170). The position-limiting member (180) is inserted in the position-limiting hole (170) such that the arm (120) engages with the holding portion (136) and the propeller protection apparatus (130) is fixed on the arm (120). The propeller (150) is disposed on the arm (120), and is located in a space defined by the protective rod (132) and the connecting rod (134). The propeller protection apparatus (130) of the invention can protect the propeller (150), and is easily mounted or removed.

Description

Propeller protection, arm and unmanned aerial vehicle

This application claims the priority of the Chinese Patent Application entitled "Propeller Protection Device, Arm and Multi-Axis Aircraft" submitted by the Chinese Patent Office on March 10, 2017, with the application number of 201720233086.1, the entire contents of which are incorporated by reference. In this application

[Technical Field]

The present application relates to the field of aircraft technology, and in particular to a propeller protection device, an arm and an unmanned aerial vehicle.

【Background technique】

Unmanned aerial vehicles are widely used in aerial photography, detection, search and rescue, resource exploration, agriculture and other fields due to their small size, light weight, low cost, flexible operation and high safety. In order to prevent the unmanned aerial vehicle propeller from rotating into an external object, an anti-collision ring is often installed at the position of the propeller. The conventional propeller anti-collision ring is mounted on the frame by fasteners such as screws, and is not easy to install and disassemble, and is inconvenient for the user to use.

[Summary of the Invention]

Based on this, it is necessary to provide a propeller protection device, an arm and an unmanned aerial vehicle for the problem that the anti-collision ring is not easy to install and disassemble.

A propeller protection device for connecting to an arm of an unmanned aerial vehicle, comprising:

Protective rod

a connecting rod having one end connected to the guard rod; and

a latching portion is connected to the other end of the connecting rod, the latching portion is provided with a limiting member, and the limiting member can be inserted into a limiting hole formed in the arm to clamp the card The part is engaged with the arm.

In some embodiments, the limiting member is a bump, and the protruding block is disposed on an inner sidewall of the holding portion.

In some embodiments, an outer surface of the bump is disposed along a direction in which the bump extends. a raised.

In some embodiments, the inner side wall of the catch portion is circumferentially provided with a second protrusion that abuts the bottom surface or the top surface of the arm.

In some embodiments, both ends of the retaining portion extend outward and are bent to form a bent portion.

In some embodiments, the limiting member is a buckle, and a sidewall of the clamping portion is provided with a through hole that cooperates with a protrusion of the arm, and the buckle is disposed at the through hole. On the end surface, the protrusion of the arm can be inserted into the through hole, and the buckle can be inserted into the limiting hole formed on the protrusion.

In some embodiments, the buckle includes a pressing portion and a clamping block, the pressing portion is disposed on an end surface of the through hole, and the clamping block is disposed on the pressing portion, and the convex portion of the arm After being inserted into the through hole, the block is inserted into the limiting hole.

In some embodiments, the limiting member is a protruding post, and the protruding post is disposed on the holding portion, and a sidewall of the holding portion is opened to cooperate with a protrusion of the arm hole.

In some embodiments, the holding portion includes a connecting portion and a extending portion, the connecting portion has a notch, the through hole is formed on a sidewall of the connecting portion, and the extending portion is configured by the connecting portion The two ends are formed to extend, and the protrusion is disposed on the extension.

In some embodiments, the catch portion further includes an unclosed snap ring, the snap ring is coupled to the extension, and the snap ring is sleeved on the arm.

An arm of an unmanned aerial vehicle, configured to be connected to a holding portion of a propeller protection device, wherein the arm defines a limiting hole, and the limiting member of the holding portion can be inserted into the limiting hole, The arm is engaged with the latching portion.

In some embodiments, the arm includes a body and a mounting portion, one end of the body being coupled to a sidewall of the mounting portion, the latch portion surrounding the mounting portion.

In some embodiments, the sidewall of the mounting portion is at least partially curved.

In some embodiments, the limiting hole is formed on a sidewall of the mounting portion, and a protrusion on an inner sidewall of the latching portion is inserted into the limiting hole.

In some embodiments, the diameter of one end of the body is smaller than the diameter of the mounting portion, and the bent portion of the catch portion snaps into the joint of the main body and the mounting portion.

In some embodiments, the side wall of the mounting portion is provided with a protrusion, the limiting hole is formed on the protrusion, and the protrusion is inserted into a through hole formed in the holding portion, Buckle of the holding portion The block is inserted into the limiting hole.

In some embodiments, the side wall of the mounting portion is provided with a protrusion, the limiting hole is formed at one end of the main body, and the protrusion is inserted into a through hole formed in the holding portion, A stud of the retaining portion is inserted into the limiting hole.

In some embodiments, the diameter of one end of the main body is smaller than the diameter of the mounting portion, and the snap ring of the holding portion is sleeved at one end of the main body.

An unmanned aerial vehicle comprising:

An arm according to any of the preceding claims;

The propeller protection device according to any one of the preceding claims, wherein the limiting member is inserted into the limiting hole to engage the arm with the clamping portion; and

a propeller is disposed on the arm, and the propeller is located in a space enclosed by the guard bar and the connecting rod.

The above propeller protection device, arm and unmanned aerial vehicle have at least the following advantages:

The propeller protection device comprises a protective rod, a connecting rod and a holding portion, one end of the connecting rod is connected with the protective rod, and the other end of the connecting rod is connected with the holding portion. The retaining portion is provided with a limited position, and the arm of the unmanned aerial vehicle has a limited hole, and the limiting member is inserted into the limiting hole to engage the clamping portion with the arm, thereby fixing the propeller protection device to the arm. . The propeller protection device can be installed and disassembled with the arm without the need of an operating tool. The propeller protection device is simple to install and disassemble, and is convenient for the user. The propeller is placed on the arm, and the propeller is located in the space enclosed by the guard rod and the connecting rod. The propeller protection device can protect the propeller and avoid the external object when the propeller rotates.

[Description of the Drawings]

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a schematic partial structural view of an unmanned aerial vehicle provided by a first embodiment of the present application;

Figure 2 is an exploded view of the unmanned aerial vehicle of Figure 1;

Figure 3 is a schematic structural view of the propeller protection device of Figure 2;

Figure 4 is a partial enlarged view of the area A in Figure 3;

5 is a partial structural schematic view of an unmanned aerial vehicle provided by a second embodiment of the present application;

Figure 6 is an exploded view of the unmanned aerial vehicle shown in Figure 5;

Figure 7 is a partial enlarged view of the area B in Figure 6;

8 is a partial structural schematic view of an unmanned aerial vehicle in a third embodiment of the present application;

Figure 9 is an exploded view of the unmanned aerial vehicle shown in Figure 8;

Figure 10 is a partial enlarged view of the area C in Figure 9;

Figure 11 is an exploded view of another perspective view of the unmanned aerial vehicle of Figure 8;

Figure 12 is a partial enlarged view of the portion D in Figure 11.

【detailed description】

The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Numerous specific details are set forth in the description below in order to provide a thorough understanding of the application. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without departing from the scope of the present application, and thus the application is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

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 applies, unless otherwise defined. The terminology used herein is for the purpose of describing particular embodiments, and is not intended to be limiting. The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

Please refer to FIG. 1 , which is an unmanned aerial vehicle 100 according to a first embodiment of the present application. The unmanned aerial vehicle 100 mainly includes a fuselage 110 , an arm 120 , a propeller protection device 130 , a motor 140 , and a propeller 150 . In the present embodiment, the unmanned aerial vehicle 100 is a four-axis aircraft, and the arm 120, the propeller protection device 130, the motor 140, and the propeller 150 are all four.

Referring to FIG. 2 together, the power source and unmanned flight of the UAV 100 are disposed in the body 110. The control system of the device 100 is used to provide energy and control for the unmanned aerial vehicle 100. The four arms 120 are spaced apart from the body 110. Specifically, the arm 120 includes a main body 122 and a mounting portion 124. One end of the main body 122 is connected to the side wall of the mounting portion 124, and the other end of the main body 122 is connected to the body 110. Connected. In other implementations, the arm 120 can be integrally formed with the body 110. The diameter of one end of the main body 122 is smaller than the diameter of the mounting portion 124, so that the connection between the main body 122 and the mounting portion 124 forms an annular groove 126. The annular groove 126 is used to mount the propeller protection device 130, which will be described in detail later. The side wall of the mounting portion 124 is at least partially curved, and in one embodiment, the mounting portion 124 is formed after the ball has been cut off from the top and/or the bottom.

Referring to FIGS. 3 and 4 , the propeller protection device 130 includes a guard bar 132 , a connecting rod 134 , and a catching portion 136 . The guard bar 132 is a curved rod. In one embodiment, it is a circular arc shape, and the orthographic projection of the guard rod 132 in the axial direction of the propeller 150 is outside the rotation range of the propeller 150 to prevent the propeller 150 from being invaded by foreign objects. One end of the connecting rod 134 is connected to the guard bar 132, and the other end of the connecting rod 134 is connected to the catching portion 136. The connecting rod 134 can also be curved and can extend obliquely from the latching portion 136 such that the connecting rod 134 and the retaining portion 136 have a certain distance in the axial direction of the propeller 150, thereby connecting the rod 134 and the guard rod 132. And the catching portion 136 partially or completely surrounds the propeller 150 in space. In the present embodiment, the connecting rods 134 are four, wherein the connecting rods 132 are respectively provided with a connecting rod 134 at opposite ends thereof, and two connecting rods 134 are also disposed at the middle of the guard rod 132. In other embodiments, the number of connecting rods 134 can be changed according to actual needs. Two connecting rods 134 spaced apart in the middle of the guard bar 132 are used to enhance the rigidity of the propeller protection device 130. In other implementations, the connecting rod 134 may not be disposed in the middle of the guard bar 132; or a connecting rod 134 may be provided; or more than two connecting rods 134 may be provided.

The holding portion 136 has an annular structure having a notch 1362 as a whole, and the engaging portion 136 partially surrounds the mounting portion 124 of the arm 120 with the axial direction of the propeller 150 as an axis. The retaining portion 136 is provided with a limiting member 180. The limiting arm 170 is defined in the arm 120, and the limiting member 180 is inserted into the limiting hole 170 to engage the locking portion 136 with the arm 120, thereby the propeller protection device. 130 is fixed to the arm 120.

The limiting member 180 is disposed on the inner side wall of the holding portion 136 in the radial direction of the holding portion 136. The side wall of the limiting member 180 is further provided with an elongated first protrusion 182 along the longitudinal direction thereof. Both ends of the holding portion 136 extend outward and are bent to form a bent portion 160. The inner side wall of the holding portion 136 is circumferentially provided with a second protrusion 1364. The limiting hole 170 is opened on the side wall of the mounting portion 124. In the embodiment, the limiting member 180 is a bump.

Referring to FIG. 2 and FIG. 4 , the limiting member 180 is inserted into the limiting hole 170 , and the limiting member 180 is disposed with a first protrusion 182 between the limiting member 180 and the sidewall of the limiting hole 170 . The gap between the limiting member 180 and the limiting hole 170 is matched. The mounting portion 124 is locked in the latching portion 136, and the side wall of the mounting portion 124 is in close contact with the inner wall of the latching portion 136, and the diameter of the mounting portion 124 is larger than the width of the notch 1362. The second protrusion 1364 abuts against the top surface of the mounting portion 124, and the bent portion 160 snaps into the annular groove 126.

The motor 140 is disposed on the mounting portion 124, and the propeller 150 is mounted on the motor 140, and the motor 140 can drive the propeller 150 to rotate. The propeller 150 is located in a space enclosed by the connecting rod 134 and the guard bar 132, and the propeller protection device 130 can protect the propeller 150.

The propeller protection device 130, the arm 120 and the UAV 100 have at least the following advantages:

When the propeller protection device 130 is mounted on the arm 120, the limiting member 180 is inserted into the limiting hole 170, and the limiting member 180 is provided with a first protrusion 182, and the side of the limiting member 180 and the limiting hole 170 can be adjusted. The gap between the walls ensures an interference fit between the limiting member 180 and the limiting hole 170, so that the latching portion 136 is engaged with the arm 120. The side wall of the mounting portion 124 closely fits the inner wall of the catching portion 136, and the stability of the mounting can be ensured. The second protrusion 1364 is offset from the top surface of the mounting portion 124 to prevent the propeller protection device 130 from shaking downward. The bent portion 160 is disposed in the annular groove 126 to further prevent the limiting member 180 from being disengaged from the limiting hole 170, thereby ensuring the fastening of the locking between the propeller protection device 130 and the arm 120. When the propeller protection device 130 is disassembled, the arm 120 of the UAV 100 is fixed, and then the propeller protection device 130 is directly pulled out along the extending direction of the limiting member 180. The propeller protection device 130 is easy to install and disassemble, and is convenient for the user to use. The propeller 150 is located in a space surrounded by the guard bar 132 and the connecting rod 134. The propeller protection device 130 can protect the propeller 150 from the external object when the propeller 150 rotates.

Referring to FIG. 5 and FIG. 6 , the UAV 200 in the second embodiment of the present application mainly includes a body 210 , a boom 220 , a propeller protection device 230 , a motor 240 , and a propeller 250 . In the present embodiment, the UAV 200 is a four-axis aircraft, and the arm 220, the propeller protection device 230, the motor 240, and the propeller 250 are all four.

A power source of the UAV 200 and a control system of the UAV 200 are provided within the fuselage 210 for providing energy and control for the UAV 200. The four arms 220 are spaced apart from the body 210. Specifically, the arm 220 includes a main body 222 and a mounting portion 224. One end of the main body 222 The main body 222 is connected to the side wall of the mounting portion 224, and the other end of the main body 222 is connected to the body 210. The diameter of one end of the main body 222 is smaller than the diameter of the mounting portion 224. In other implementations, the arm 220 can be integrally formed with the body 210. The side wall of the mounting portion 224 is at least partially curved. In one embodiment, the mounting portion 224 is formed after the ball has been cut off from the top and/or the bottom.

The propeller protection device 230 includes a guard bar 232, a connecting rod 234, and a catching portion 236. The guard bar 232 is a curved rod. In one embodiment, it is a circular arc shape, and the orthographic projection of the guard rod 232 in the axial direction of the propeller 250 is outside the rotation range of the propeller 250 to prevent the propeller 250 from being invaded by foreign objects. One end of the connecting rod 234 is connected to the rod body of the guard bar 232, and the other end of the connecting rod 234 is connected to the catching portion 236. The connecting rod 234 can also be curved and can extend obliquely from the latching portion 236 such that the connecting rod 234 and the retaining portion 236 have a certain distance in the axial direction of the propeller 250, thereby connecting the rod 234 and the guard rod 232. And the catching portion 236 partially or completely surrounds the propeller 250 in space. In this embodiment, the connecting rods 234 are two, and a connecting rod 234 is disposed on each of the opposite ends of the guard bar 232. In other embodiments, the number of connecting rods 234 can be changed according to actual needs. For example, to enhance the rigidity of the propeller protection device 230, more connecting rods 234 may be disposed in the middle of the guard bar 232.

The holding portion 236 has an annular structure having a notch 2362 as a whole, and the catching portion 236 partially surrounds the mounting portion 224 of the arm 220 with the axial direction of the propeller 250 as an axis. A limiting member 280 is disposed on the holding portion 236, and a limiting hole 262 is defined in the arm 220. The limiting member 280 is inserted into the limiting hole 262 to engage the locking portion 236 with the arm 220 to protect the propeller. Device 230 is attached to arm 220.

Referring to FIG. 7 , in the second embodiment, the side wall of the mounting portion 224 is provided with a protrusion 260 , and the limiting hole 262 is defined in the protrusion 260 , and the limiting hole 262 extends through the opposite sides of the protrusion 260 . side. The side wall of the holding portion 236 defines a through hole 270 that cooperates with the bump 260. The stopper 280 includes a pressing portion 282 and a block 284. The pressing portion 282 is disposed on the end surface of the through hole 270, and the block 284 is disposed on the pressing portion 282. In this embodiment, the limiting member 280 is a buckle.

When the protrusion 260 is inserted into the through hole 270 , the mounting portion 224 is located in the holding portion 236 , and the side wall of the mounting portion 224 is closely adhered to the inner wall of the holding portion 236 , and the width of the notch 2362 is equal to the diameter of the mounting portion 224 . After the bump 260 is inserted into the through hole 270, the block 284 is inserted into the limiting hole 262.

The motor 240 is disposed on the mounting portion 224, and the propeller 250 is mounted on the motor 240, and the motor 240 can drive the propeller 250 to rotate. The propeller 250 is located in a space enclosed by the connecting rod 234 and the guard bar 232, and the propeller protection device 230 can protect the propeller 250.

The propeller protection device 230, the arm 220 and the UAV 200 have at least the following advantages:

When the propeller protection device 230 is mounted on the arm 220, the protrusion 260 is inserted into the through hole 270, the mounting portion 224 is located in the holding portion 236, and the side wall of the mounting portion 224 is closely attached to the inner wall of the holding portion 236, and Guarantee the stability of the installation. The block 284 of the limiting member 280 is inserted into the limiting hole 262. The engagement of the blocking block 284 with the limiting hole 262 prevents the protruding block 260 from being separated from the through hole 270, so that the locking portion 236 is coupled to the arm 220. Card access. When the propeller protection device 230 is disassembled, the arm 220 of the UAV 200 is fixed, and then the pressing portion 282 is pressed downward to disengage the block 284 from the limiting hole 262, and then the propeller protection device is pulled out along the axial direction of the protrusion 260. 230 can be. The propeller protection device 230 is easy to install and disassemble, and is convenient for users. The propeller 250 is located in a space surrounded by the guard bar 232 and the connecting rod 234, and the propeller protection device 230 can protect the propeller 250 from the external object when the propeller 250 rotates.

Please refer to FIG. 8 , which is an unmanned aerial vehicle 300 in a third embodiment. The unmanned aerial vehicle 300 mainly includes a fuselage 310 , an arm 320 , a propeller protection device 330 , a motor 340 , and a propeller 350 . In the present embodiment, the unmanned aerial vehicle 300 is a four-axis aircraft, and the arm 320, the propeller protection device 330, the motor 340, and the propeller 350 are all four.

Referring to FIG. 9 and FIG. 10 together, the power source of the UAV 300 and the control system of the UAV 300 are provided in the body 310 for providing kinetic energy and control for the UAV 300. The four arms 320 are spaced apart from the body 310. Specifically, the arm 320 includes a main body 322 and a mounting portion 324. One end of the main body 322 is connected to the side wall of the mounting portion 324, and the other end of the main body 322 is connected to the body 310. Connected. In other implementations, the arm 320 can be integrally formed with the body 310. The side wall of the mounting portion 324 is at least partially curved. In one embodiment, the mounting portion 324 is formed by cutting the top and/or the bottom of the ball. The diameter of the mounting portion 324 is larger than the diameter of one end of the body 322.

The propeller protection device 330 includes a guard bar 332, a connecting rod 334, and a catching portion 336. The guard bar 332 is a curved rod. In one embodiment, it is a circular arc shape, and the orthographic projection of the guard rod 332 in the axial direction of the propeller 350 is outside the rotation range of the propeller 350 to prevent the propeller 350 from being invaded by foreign objects. One end of the connecting rod 334 is connected to the rod body of the guard bar 332, and the other end of the connecting rod 334 is connected to the catching portion 336. The connecting rod 334 can also be curved and can extend obliquely from the latching portion 336 such that the connecting rod 334 and the latching portion 336 have a certain distance in the axial direction of the propeller 350, thereby connecting the rod 334 and the guard rod 332. And the catching portion 336 partially or completely surrounds the propeller 350 in space. In this reality In the embodiment, the connecting rods 334 are two, and a connecting rod 334 is disposed at opposite ends of the guard bar 332. In other embodiments, the number of connecting rods 334 can be changed according to actual needs. For example, to enhance the rigidity of the propeller protection device 230, more connecting rods 234 may be disposed in the middle of the guard bar 232.

The holding portion 336 has an annular structure having a notch 3368 as a whole, and the catching portion 336 partially surrounds the mounting portion 324 of the arm 320 with the axial direction of the propeller 350 as an axis. A limiting member 380 is disposed on the holding portion 336, and a limiting hole 326 is defined in the arm 320. The limiting member 380 is inserted into the limiting hole 326 to engage the locking portion 336 with the arm 320, thereby protecting the propeller. Device 330 is attached to arm 320.

Referring to FIG. 9 to FIG. 12 , in particular, in the third embodiment, the side wall of the mounting portion 324 is provided with a protrusion 360 , and the square 360 is provided with a square hole 362 , which can reduce the weight of the protrusion 360 . The overall weight of the UAV 300 can be reduced. The holding portion 336 includes a connecting portion 3362, an extending portion 3364 and a snap ring 3366. The notch 3368 is formed on the connecting portion 3362. The side wall of the connecting portion 3362 defines a through hole 370 that cooperates with the bump 360. The extending portion 3364 is formed by extending both ends of the connecting portion 3362, and the limiting member 380 is disposed at the bottom of the extending portion 3364. The snap ring 3366 is connected to the extension portion 3364. The snap ring 3366 is an unclosed snap ring, and both ends of the snap ring 3366 are bent outward, so that the snap ring 3366 is sleeved on one end of the main body 322. The limiting hole 326 is opened at one end of the main body 322.

When the bump 360 is inserted into the through hole 370, the width of the notch 3368 is smaller than the diameter of the mounting portion 324, the mounting portion 324 is locked in the connecting portion 3362, and the side wall of the mounting portion 324 is in close contact with the inner wall of the connecting portion 3362. The limiting member 380 of the extending portion 3364 is inserted into the limiting hole 326. The snap ring 3366 is sleeved at one end of the main body 322, and the diameter of the snap ring 3366 is smaller than the diameter of the mounting portion 324. In this embodiment, the limiting member 380 is a stud.

The motor 340 is disposed on the mounting portion 324, and the propeller 350 is mounted on the motor 340, and the motor 340 can drive the propeller 350 to rotate. The propeller 350 is located in a space enclosed by the connecting rod 334 and the guard bar 332, and the propeller protection device 330 can protect the propeller 350.

The plurality of aircrafts 300 and their propeller protection devices 330 described above have at least the following advantages:

When the propeller protection device 330 is mounted on the arm 320, the protrusion 360 is inserted into the through hole 370, and the mounting portion 324 is locked in the connecting portion 3362. The side wall of the mounting portion 324 is closely attached to the inner wall of the connecting portion 3362. Guarantee the stability of the installation. The limiting member 380 is inserted into the limiting slot 326 to prevent the bump 360 from being disengaged from the through hole 370, so that the latching portion 336 is engaged with the arm 320. The snap ring 3366 is sleeved at one end of the main body 322, and the diameter of the snap ring 3366 is smaller than the diameter of the mounting portion 324, Only the propeller protection device 330 can be prevented from shaking up and down, and the protrusion 360 can be further prevented from being separated from the through hole 370, and the fastening between the propeller protection device 330 and the arm 320 can be ensured. When the propeller protection device 330 is disassembled, the arm 320 of the UAV 300 is fixed, and the snap ring 3366 is moved downward to disengage one end of the main body 322 from the snap ring 3366, and the limiting member 380 is separated from the limiting hole 326. Then, the bump 360 can be pulled out from the through hole 370. The propeller protection device 330 is easy to install and disassemble, and is convenient for users. The propeller 350 is located in a space surrounded by the guard bar 332 and the connecting rod 334, and the propeller protection device 330 can protect the propeller 350 from the external object when the propeller 350 rotates.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims (19)

A propeller protection device for connecting with an arm of an unmanned aerial vehicle, characterized in that it comprises: Protective rod a connecting rod having one end connected to the guard rod; and a latching portion is connected to the other end of the connecting rod, the latching portion is provided with a limiting member, and the limiting member can be inserted into a limiting hole formed in the arm to clamp the card The part is engaged with the arm. The propeller protection device according to claim 1, wherein the limiting member is a bump, and the protruding block is disposed on an inner sidewall of the holding portion. The propeller protection device according to claim 2, wherein an outer surface of the bump is provided with a first protrusion along a direction in which the protrusion extends. The propeller protection device according to any one of claims 1 to 3, wherein the inner side wall of the holding portion is circumferentially provided with a second protrusion, the second protrusion and a bottom surface of the arm Or the top surface is offset. The propeller protection device according to any one of claims 1 to 4, wherein both ends of the holding portion extend outward and are bent to form a bent portion. The propeller protection device according to claim 1, wherein the limiting member is a buckle, and a sidewall of the clamping portion is provided with a through hole that cooperates with a protrusion of the arm, The buckle is disposed on the end surface of the through hole, the protrusion of the arm can be inserted into the through hole, and the buckle can be inserted into the limiting hole formed on the protrusion. The propeller protection device according to claim 6, wherein the buckle comprises a pressing portion and a block, the pressing portion is disposed on an end surface of the through hole, and the card block is disposed on the After the protrusion of the arm is inserted into the through hole, the block is inserted into the limiting hole. The propeller protection device according to claim 1, wherein the limiting member is a protruding post, the protruding post is disposed on the holding portion, and a sidewall of the holding portion is opened and A through hole in which the bump of the arm fits. The propeller protection device according to claim 8, wherein the holding portion includes a connecting portion and an extending portion, the connecting portion has a notch, and the through hole is opened on a side wall of the connecting portion. The extension portion is formed by extending both ends of the connecting portion, and the protrusion is disposed on the extension portion. The propeller protection device according to claim 9, wherein the retaining portion further comprises an unclosed snap ring, the snap ring is connected to the extension portion, and the snap ring is sleeved on the On the arm. An arm of an unmanned aerial vehicle is connected to a latching portion of a propeller protection device, wherein the arm has a limited hole, and the limiting member of the retaining portion can be inserted into the limit Inside the hole, the arm is engaged with the holding portion. The arm according to claim 11, wherein the arm comprises a main body and a mounting portion, and one end of the main body is connected to a side wall of the mounting portion, and the engaging portion surrounds the mounting unit. The arm according to claim 12, wherein the side wall of the mounting portion is at least partially curved. The arm according to claim 12, wherein the limiting hole is formed on a side wall of the mounting portion, and a protrusion on an inner side wall of the holding portion is inserted into the limiting hole. The arm according to claim 14, wherein the diameter of one end of the body The diameter of the mounting portion is smaller than the diameter of the mounting portion, and the bent portion of the engaging portion is engaged with the connection portion between the main body and the mounting portion. The arm of claim 12, wherein the side wall of the mounting portion is provided with a protrusion, the limiting hole is formed on the protrusion, and the protrusion is inserted in the card holder In the through hole of the portion, the snap block of the latching portion is inserted into the limiting hole. The arm of claim 11, wherein the side wall of the mounting portion is provided with a protrusion, the limiting hole is formed at one end of the main body, and the protrusion is inserted into the card holder In the through hole of the portion, the stud of the holding portion is inserted into the limiting hole. The arm according to claim 17, wherein a diameter of one end of the main body is smaller than a diameter of the mounting portion, and a snap ring of the holding portion is sleeved at one end of the main body. An unmanned aerial vehicle, comprising: A machine arm according to any one of claims 11-18; The propeller protection device according to any one of claims 1 to 10, wherein the limiting member is inserted into the limiting hole to engage the arm with the holding portion; and a propeller is disposed on the arm, and the propeller is located in a space enclosed by the guard bar and the connecting rod.

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