Unmanned aerial vehicle arm and unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and provides an unmanned aerial vehicle arm and an unmanned aerial vehicle, the arm comprises a first-order arm, a second-order arm, a connecting mechanism and a locking assembly, the connecting mechanism comprises a first connecting assembly and a second connecting assembly which are oppositely arranged, the second-order arm is rotatably connected to the first-order arm through the first connecting assembly, and the second-order arm is rotatably connected to the second-order arm through the second connecting assembly. The second connecting assembly comprises a folding pull rod and a locking pull rod, the first end of the folding pull rod is rotationally connected to the first-order arm, the first end of the locking pull rod is rotationally connected to the second-order arm, and the second end of the locking pull rod is rotationally connected to the folding pull rod; the locking assembly is arranged between the second-order machine arm and the folding pull rod. The first-order machine arm and the second-order machine arm are rotationally connected through the first connecting assembly, the second-order machine arm can rotate around the first connecting assembly relative to the first-order machine arm through the second connecting assembly, folding of the second-order machine arm relative to the first-order machine arm is achieved, and therefore the overall axial size of the first-order machine arm and the second-order machine arm is reduced; and transportation and storage are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle arm and an unmanned aerial vehicle. Background Art

[0002] In recent years, unmanned aerial vehicle technology has been widely applied in various industries. With the continuous expansion of the application fields of unmanned aerial vehicles, the demands for the portability, transportation efficiency and adaptability of unmanned aerial vehicles are also increasing day by day.

[0003] In the related art, as a core part of an unmanned aerial vehicle, the unmanned aerial vehicle arm improves the stability and controllability of the unmanned aerial vehicle by increasing the wheelbase of the unmanned aerial vehicle arm. However, the unmanned aerial vehicle arm with a larger wheelbase is not convenient for transportation and storage. Summary of the Utility Model

[0004] The utility model provides an unmanned aerial vehicle arm and an unmanned aerial vehicle to solve the defect that the unmanned aerial vehicle arm with a larger wheelbase in the prior art is not convenient for transportation and storage.

[0005] The utility model provides an unmanned aerial vehicle arm, including a first-order arm, a second-order arm, a connection mechanism and a locking assembly. The connection mechanism is connected between the first-order arm and the second-order arm. The connection mechanism includes a first connection component and a second connection component which are oppositely arranged. The second-order arm is rotationally connected to the first-order arm through the first connection component. The second connection component includes a folding pull rod and a locking pull rod. The first end of the folding pull rod is rotationally connected to the first-order arm. The first end of the locking pull rod is rotationally connected to the second-order arm. The second end of the locking pull rod is rotationally connected to the folding pull rod. The locking assembly is arranged between the second-order arm and the folding pull rod. The locking assembly is adapted to switch between a locking state and an unlocking state. In the locking state, the folding pull rod is locked to the second-order arm through the locking assembly, so that the second-order arm is connected to the extension side of the first-order arm. In the unlocking state, the locking assembly releases the locking of the folding pull rod, so that the second-order arm rotates out of the extension side of the first-order arm.

[0006] According to the unmanned aerial vehicle arm provided by the utility model, the first-order arm has a first hinge seat rotationally connected to the first end of the folding pull rod. The second-order arm has a second hinge seat rotationally connected to the first end of the locking pull rod. The folding pull rod has a hinge portion rotationally connected to the second end of the locking pull rod. In the locking state, the first hinge seat, the second hinge seat and the hinge portion are collinear.

[0007] According to the unmanned aerial vehicle arm provided by the utility model, in the locking state, the folding pull rod and the locking pull rod are parallel, and the second end of the locking pull rod is close to the second-order arm.

[0008] According to a drone arm provided by the present utility model, the locking assembly includes a first locking portion and a locking member. The first locking portion is provided on one of the second end of the folding pull rod and the second-order arm; the locking member is rotatably connected to the other of the second end of the folding pull rod and the second-order arm through an elastic member, and the locking member has a second locking portion that cooperates with the first locking portion; in the locked state, the tension force of the elastic member causes the second locking portion to lock the first locking portion; in the unlocked state, the locking member overcomes the tension force to release the locking of the first locking portion.

[0009] According to a drone arm provided by the present utility model, the first locking portion includes a lock hole, and the second locking portion includes a lock hook that cooperates with the lock hole.

[0010] According to a drone arm provided by the present utility model, the second-order arm has a mounting hole through which the locking member passes. The mounting hole has opposite first and second side surfaces; in the locked state, the locking member abuts against the first side surface; in the unlocked state, the locking member abuts against the second side surface.

[0011] According to a drone arm provided by the present utility model, the first-order arm has a first positioning portion, and the second-order arm has a second positioning portion. In the locked state, the first positioning portion cooperates with the second positioning portion.

[0012] According to a drone arm provided by the present utility model, both the first positioning portion and the second positioning portion are hollow tubes. The first hinge seat is provided on the first positioning portion, and the second hinge seat is provided on the second positioning portion; the first connection assembly includes a third hinge seat and a second hinge portion rotatably connected to the third hinge seat. The third hinge seat is provided on the first positioning portion, and the second hinge portion is provided on the second positioning portion. The first hinge seat and the third hinge seat are symmetrically arranged.

[0013] The present utility model also provides a drone, including a drone main body and the drone arm according to any one of the above. The first-order arm is provided on the drone main body.

[0014] According to a drone provided by the present utility model, the drone main body has a clamping assembly for clamping the second-order arm.

[0015] The drone arm and the drone provided by the present utility model have the first-order arm and the second-order arm rotatably connected by a first connection component. Through the second connection component between the first-order arm and the second-order arm, the second-order arm can rotate relative to the first-order arm around the first connection component to achieve the folding of the second-order arm relative to the first-order arm, thereby reducing the overall axial dimension of the first-order arm and the second-order arm, and facilitating transportation and storage. In addition, the second connection component uses a folding rod and a locking rod, utilizes the principle of the dead point of the linkage formed by the folding rod and the locking rod, and locks the folding rod and the second-order arm through a locking component to improve the reliability of the connection between the second-order arm and the first-order arm in the locked state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is one of the schematic structural diagrams of the drone arm provided by the present utility model.

[0018] Figure 2 is another schematic structural diagram of the drone arm provided by the present utility model.

[0019] Figure 3 is one of the schematic structural diagrams at the first-order arm provided by the present utility model.

[0020] Figure 4 is another schematic structural diagram at the first-order arm provided by the present utility model.

[0021] Figure 5 is the schematic structural diagram at the second-order arm provided by the present utility model.

[0022] Figure 6 is Figure 2 the partial enlarged structural schematic diagram at A of

[0023] Reference numerals: 1, first-order arm; 11, first hinge seat; 12, first positioning portion; 2, second-order arm; 21, second hinge seat; 22, second positioning portion; 23, mounting seat; 3, first connection component; 31, third hinge seat; 32, second hinge portion; 4, second connection component; 41, folding rod; 42, locking rod; 5, locking component; 51, first locking portion; 52, locking member; 521, second locking portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0027] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0029] The following will describe the drone arm of the embodiments of the present utility model in conjunction with Figures 1-6 Describe the drone arm of the embodiments of the present utility model.

[0030] An embodiment of the first aspect of the present utility model provides a drone arm, as shown in Figure 1 and Figure 2 shown, the drone arm includes a first-order arm 1, a second-order arm 2, a connecting mechanism, and a locking assembly 5.

[0031] Among them, the connecting mechanism is connected between the first-order arm 1 and the second-order arm 2. The connecting mechanism includes a first connecting component 3 and a second connecting component 4 arranged oppositely. The second-order arm 2 is rotatably connected to the first-order arm 1 through the first connecting component 3. The second connecting component 4 includes a folding pull rod 41 and a locking pull rod 42. The first end of the folding pull rod 41 is rotatably connected to the first-order arm 1, the first end of the locking pull rod 42 is rotatably connected to the second-order arm 2, and the second end of the locking pull rod 42 is rotatably connected to the folding pull rod 41.

[0032] The locking assembly 5 is arranged between the second-order arm 2 and the folding pull rod 41. The locking assembly 5 is adapted to switch between a locked state and an unlocked state. In the locked state, the folding pull rod 41 is locked to the second-order arm 2 through the locking assembly 5, so that the second-order arm 2 is connected to the extension side of the first-order arm 1. In the unlocked state, the locking assembly 5 releases the locking of the folding pull rod 41, so that the second-order arm 2 rotates out of the extension side of the first-order arm 1.

[0033] It can be understood that the first-order arm 1 and the second-order arm 2 are rotatably connected through the first connecting component 3, and the second connecting component 4 between the first-order arm 1 and the second-order arm 2 enables the second-order arm 2 to rotate relative to the first-order arm 1 around the first connecting component 3. Specifically, by rotating the folding pull rod 41 around the first-order arm 1, since both ends of the locking pull rod 42 are rotatably connected, the folding pull rod 41 drives the locking pull rod 42 to rotate and move, and then the locking pull rod 42 drives the second-order arm 2 to rotate.

[0034] For example, the folding pull rod 41 switches between the first position and the second position. When the folding pull rod 41 is in the first position, the second end of the folding pull rod 41 is close to the second-order arm 2. The folding pull rod 41 is locked to the second-order arm 2 through the locking assembly 5. At this time, the second-order arm 2 is connected to the extension side of the first-order arm 1, and the locking assembly 5 is in the locked state. When the folding pull rod 41 is in the second position, the locking assembly 5 releases the locking of the folding pull rod 41, and the second end of the folding pull rod 41 moves away from the second-order arm 2, so that the second-order arm 2 rotates out of the extension side of the first-order arm 1, and the drone arm is in the folded state.

[0035] For the drone arm provided by the present utility model, the first-order arm 1 and the second-order arm 2 are rotatably connected by the first connection assembly 3. Through the second connection assembly 4 between the first-order arm 1 and the second-order arm 2, the second-order arm 2 can rotate relative to the first-order arm 1 around the first connection assembly 3 to realize the folding of the second-order arm 2 relative to the first-order arm 1, thereby reducing the overall axial dimension of the first-order arm 1 and the second-order arm 2, and facilitating transportation and storage. In addition, the second connection assembly 4 adopts a folding pull rod 41 and a locking pull rod 42, utilizes the principle of dead center of the link mechanism formed by the folding pull rod 41 and the locking pull rod 42, and locks the folding pull rod 41 and the second-order arm 2 through the locking assembly 5 to improve the reliability of the connection between the second-order arm 2 and the first-order arm 1 in the locked state.

[0036] The drone arm provided by the present utility model has the characteristics of simple structure, easy control, low maintenance cost and long service life, and has a fixed working space and working radius, and is suitable for working in an environment with limited space.

[0037] According to the embodiment of the present utility model, in a planar link mechanism, if the rocker is used as the driving member, when the other two moving members are in the position of being on the same straight line, no matter how large the driving force is, the moving member cannot be started. For example, in a crank-rocker mechanism, when the rocker is the driving member and the crank is in the two extreme positions where it is in a straight line with the connecting rod, the force transmitted by the connecting rod to the crank cannot generate a torque to make the crank rotate. This state is called the dead center. In this embodiment, the first-order arm 1, the folding pull rod 41, the locking pull rod 42, and the second-order arm 2 form a crank-rocker mechanism, and the principle of dead center of the link mechanism is formed by the folding pull rod 41 and the locking pull rod 42 to lock the connection between the second-order arm 2 and the first-order arm 1.

[0038] Specifically, such as Figure 2 and Figure 3As shown, the outer sidewall of the first-order arm 1 has a first hinge seat 11 rotatably connected to the first end of the folding pull rod 41, the outer sidewall of the second-order arm 2 has a second hinge seat 21 rotatably connected to the first end of the locking pull rod 42, and the folding pull rod 41 has a hinge portion rotatably connected to the second end of the locking pull rod 42. When the folding pull rod 41 is in the first position, the first hinge seat 11, the second hinge seat 21, and the hinge portion are collinear, and the crank-rocker mechanism is locked when it is in the dead center position. At this time, the second-order arm 2 is coaxially connected to the extended side of the first-order arm 1, the second-order arm 2 and the first-order arm 1 are completely attached, and the locking assembly 5 is in the locked state to lock the folding pull rod 41 to the second-order arm 2.

[0039] Exemplarily, the first end of the folding pull rod 41 and the first hinge seat 11, the first end of the locking pull rod 42 and the second hinge seat 21, and the second end of the locking pull rod 42 and the hinge portion are all connected by a pin shaft.

[0040] The drone arm provided by the present utility model utilizes the principle of the dead center of the connecting rod formed by the folding pull rod 41 and the locking pull rod 42 to closely engage the second-order arm 2 and the first-order arm 1, so as to improve the reliability of the connection between the second-order arm 2 and the first-order arm 1 in the locked state.

[0041] Further, as Figure 2 and Figure 3 shown, in the locked state, the folding pull rod 41 and the locking pull rod 42 are parallel, and the second end of the locking pull rod 42 is close to the second-order arm 2.

[0042] It can be understood that when the folding pull rod 41 is in the first position, the folding pull rod 41 is slightly inclined and arranged outside the second-order arm 2, and the second end of the folding pull rod 41 is close to the second-order arm 2, so as to further improve the reliability of the connection between the second-order arm 2 and the first-order arm 1 in the locked state.

[0043] In an embodiment of the present utility model, as Figure 2 and Figure 6 shown, the locking assembly 5 includes a first locking portion 51 and a locking member 52. The first locking portion 51 is arranged on the second-order arm 2; the locking member 52 is rotatably connected to the second end of the folding pull rod 41 through an elastic member, and the locking member 52 has a second locking portion 521 that cooperates with the first locking portion 51.

[0044] It can be understood that when the folding pull rod 41 rotates to the first position, the second-order arm 2 is connected to the extension side of the first-order arm 1. By overcoming the tension force of the elastic member with the locking member 52, the second locking portion 521 is connected to the first locking portion 51, and under the action of the tension force of the elastic member, the second locking portion 521 locks the first locking portion 51. At this time, the locking assembly 5 is in a locked state, and the second-order arm 2 unfolds relative to the first-order arm 1 and is connected to the extension side of the first-order arm 1; when the second-order arm 2 needs to be folded, the locking member 52 overcomes the tension force to release the lock between the second locking portion 521 and the first locking portion 51, so that the second locking portion 521 is separated from the first locking portion 51. By rotating the folding pull rod 41 to the second position, the second-order arm 2 is rotated out of the extension side of the first-order arm 1, realizing the folding of the second-order arm 2 relative to the first-order arm 1.

[0045] Optionally, the first locking portion 51 includes a locking hole, and the second locking portion 521 includes a locking hook that cooperates with the locking hole.

[0046] It can be understood that a locking hole is provided on the second-order arm 2. The locking member 52 is rotatably connected to the second end of the folding pull rod 41 through a pin shaft. An elastic member is provided between the locking member 52 and the folding pull rod 41. The elastic member can adopt an elastic structure such as a spring or a snap spring. The elastic member provides a tension force to the locking member 52, and the locking member 52 has a locking hook that cooperates with the locking hole.

[0047] Exemplarily, when the locking assembly 5 is in the locked state, due to the tension force of the elastic member (the rebounding force of the spring), the locking hook of the locking member 52 is locked in the locking hole; when it is necessary to switch the locking assembly 5 from the locked state to the unlocked state, rotate the locking member 52 to overcome the tension force of the elastic member and release the lock of the locking hole on the locking hole.

[0048] Exemplarily, as Figure 6 shown, an installation seat 23 is provided on the outer side wall of the second-order arm 2, and a locking hole is provided on the installation seat 23. It should be noted that the locking hole can also adopt a groove that cooperates with the locking hook.

[0049] Furthermore, the second-order arm 2 has an installation hole through which the locking member 52 passes. The installation hole has opposite first and second side surfaces. In the locked state, the locking member 52 abuts against the first side surface, and in the unlocked state, the locking member 52 abuts against the second side surface, thereby limiting the rotation position of the locking member 52.

[0050] It should be noted that in other embodiments, the installation positions of the above-mentioned first locking portion 51 and the locking member 52 can be interchanged, that is, the first locking portion 51 is provided at the second end of the folding pull rod 41, and the locking member 52 is rotatably connected to the second-order arm 2 through an elastic member.

[0051] In a preferred embodiment of the present invention, as Figures 3-5As shown in the figure, the first-order arm 1 has a first positioning portion 12, and the second-order arm 2 has a second positioning portion 22. In the locked state, the first positioning portion 12 is fitted to the second positioning portion 22, so that the positioning of the first-order arm 1 and the second-order arm 2 is achieved when they are connected through the first positioning portion 12 and the second positioning portion 22, thereby improving the reliability of the connection between the first-order arm 1 and the second-order arm 2.

[0052] Optionally, the ends of the first-order arm 1 and the second-order arm 2 that are connected are in the shape of a hollow tube. Both the first positioning portion 12 and the second positioning portion 22 are hollow tubes. The first end of the first positioning portion 12 is coaxially connected to the first-order arm 1, and the first end of the second positioning portion 22 is coaxially connected to the second-order arm 2. The second end of the first positioning portion 12 and the second end of the second positioning portion 22 are positioned and fitted. Specifically, the inner wall of the first positioning portion 12 has a positioning protrusion, and the outer wall of the second positioning portion 22 is provided with a notch to form a positioning groove that cooperates with the positioning protrusion.

[0053] Furthermore, the first hinge seat 11 is arranged on the first positioning portion 12, the second hinge seat 21 is arranged on the second positioning portion 22. The first connection assembly 3 includes a third hinge seat 31 and a second hinge portion 32. The third hinge seat 31 is arranged on the first positioning portion 12, the second hinge portion 32 is arranged on the second positioning portion 22. The third hinge seat 31 and the second hinge portion 32 are rotationally connected by a pin shaft, and the first hinge seat 11 and the third hinge seat 31 are symmetrically arranged.

[0054] An embodiment of the second aspect of the present invention provides a drone, which includes a drone main body and the drone arm provided in any of the above embodiments. The first-order arm 1 is arranged on the drone main body.

[0055] It can be understood that the drone arm includes a first-order arm 1 and a second-order arm 2 that can be folded and unfolded relative to the first-order arm 1. Thus, the drone arm has foldability. This design enables the drone to be folded and unfolded as needed during flight, thereby providing a wider range of application scenarios.

[0056] It should be noted that the drone arm needs to withstand certain deformations and stresses during the folding and unfolding process, which may result in relatively poor stability of the drone during flight. Especially in harsh environments such as high-speed flight or strong winds, the deformation of the drone arm may affect the flight performance and safety of the drone, and even cause arm failures or damages, increasing the maintenance and repair costs for users. Therefore, in this embodiment, the first-order arm 1 and the second-order arm 2 are connected through the first connection assembly 3 and the second connection assembly 4. The second connection assembly 4 utilizes the folding pull rod 41 and the locking pull rod 42 to improve the stability and reliability during the folding and unfolding process of the drone arm, further ensuring the stability and safety of the drone in various environments, and reducing the maintenance and repair costs.

[0057] It should be noted that in the related art, the drone is usually installed on a fire truck, and the axial dimension of the drone arm is matched with the length of the fire truck, thus limiting the axial dimension of the drone arm. However, in the present utility model, the first-order arm 1 and the second-order arm 2 can achieve the folding and unfolding of the second-order arm 2 relative to the first-order arm 1 through a connecting mechanism. It is only necessary that the axial dimension of the first-order arm 1 is matched with the length of the fire truck. The second-order arm 2 serves as an extended axial dimension. Therefore, under the same length of the fire truck, the axial length of the drone arm of the present utility model can be longer. Increasing the axial length allows the use of a larger diameter propeller, effectively providing lift and improving energy efficiency.

[0058] Optionally, the drone arm can be applied to a large-load air-ground collaborative tethered fire-fighting drone, which is a drone that is continuously powered by connecting to a ground power supply device through a cable and completes the ground-air signal transmission.

[0059] Furthermore, the drone body has a clamping component. In the unlocked state, the clamping component is used to clamp the second-order arm 2.

[0060] It can be understood that the locking component 5 releases the lock of the folding rod 41, and by rotating the folding rod 41, the second-order arm 2 is rotated out of the extended side of the first-order arm 1 to achieve the folding of the second-order arm 2 relative to the first-order arm 1, and the second-order arm 2 is clamped by the clamping component on the drone body to prevent the second-order arm 2 from shaking during transportation and storage.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A drone arm, characterized in that: include: First-stage arm; Second-stage arm; A connecting mechanism is connected between the first-stage machine arm and the second-stage machine arm, the connecting mechanism includes a first connecting assembly and a second connecting assembly arranged opposite to each other, the second-stage machine arm is rotatably connected to the first-stage machine arm through the first connecting assembly, the second connecting assembly includes a folding rod and a locking rod, the first end of the folding rod is rotatably connected to the first-stage machine arm, the first end of the locking rod is rotatably connected to the second-stage machine arm, and the second end of the locking rod is rotatably connected to the folding rod; A locking assembly is arranged between the second-stage machine arm and the folding rod, and the locking assembly is suitable for switching between a locked state and an unlocked state. In the locked state, the folding rod is locked to the second-stage machine arm through the locking assembly so that the second-stage machine arm is connected to the extended side of the first-stage machine arm. In the unlocked state, the locking assembly releases the lock of the folding rod so that the second-stage machine arm is rotated out of the extended side of the first-stage machine arm.

2. The drone arm according to claim 1, characterized in that: The first-stage arm has a first articulated seat rotatably connected to the first end of the folding rod, the second-stage arm has a second articulated seat rotatably connected to the first end of the locking rod, the folding rod has a hinged portion rotatably connected to the second end of the locking rod, and in the locked state, the first articulated seat, the second articulated seat and the articulated portion are collinear.

3. The drone arm according to claim 2, characterized in that: In the locked state, the folding rod and the locking rod are parallel, and the second end of the locking rod is close to the second-stage machine arm.

4. The drone arm according to claim 2, characterized in that: The locking assembly comprises: A first locking portion, provided at the second end of the folding rod and one of the second-stage machine arm; A locking member, wherein the locking member is rotatably connected to the second end of the folding pull rod and the other one of the second-stage machine arms through an elastic member, and the locking member has a second locking portion that cooperates with the first locking portion; in the locked state, the tensioning force of the elastic member causes the second locking portion to lock the first locking portion; in the unlocked state, the locking member overcomes the tensioning force and unlocks the first locking portion.

5. The drone arm according to claim 4, characterized in that: The first locking portion includes a locking hole, and the second locking portion includes a locking hook matched with the locking hole.

6. The drone arm according to claim 4, characterized in that: The second-stage machine arm has a mounting hole through which the locking member passes, and the mounting hole has a first side surface and a second side surface that are opposite to each other; In the locked state, the locking member abuts against the first side surface; In the unlocked state, the locking member abuts against the second side surface.

7. The drone arm according to any one of claims 2 to 6, characterized in that: The first-stage arm has a first positioning portion, and the second-stage arm has a second positioning portion. In the locked state, the first positioning portion is matched with the second positioning portion.

8. The drone arm according to claim 7, characterized in that: The first positioning portion and the second positioning portion are both hollow tubular, the first articulated seat is arranged on the first positioning portion, and the second articulated seat is arranged on the second positioning portion; the first connecting component includes a third articulated seat and a second articulated portion rotatably connected to the third articulated seat, the third articulated seat is arranged on the first positioning portion, the second articulated portion is arranged on the second positioning portion, and the first articulated seat and the third articulated seat are symmetrically arranged.

9. A drone, characterized in that: It comprises a drone body and a drone arm as described in any one of claims 1 to 8, wherein the first-stage arm is arranged on the drone body.

10. The drone according to claim 9, characterized in that: The drone body has a clamping assembly, and the clamping assembly is used to clamp the second-stage machine arm.

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