Axial rotation limiting structure, vehicle arm assembly and unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to an axial rotation limiting structure, a vehicle arm assembly and an unmanned aerial vehicle. The axial rotation limiting structure comprises a mounting frame, a first limiting part and a second limiting part, and the mounting frame is used for being connected with a fuselage of the unmanned aerial vehicle; the vehicle arm is movably connected to the mounting frame and can axially rotate on the mounting frame; the first limiting part is arranged on the mounting frame; the second limiting part is arranged on the vehicle arm and can rotate along with the vehicle arm to make contact with the first limiting part so as to limit the axial rotation angle of the vehicle arm. According to the unmanned aerial vehicle, it can be guaranteed that the vehicle arm tilts within the angle range limited by the first limiting part and the second limiting part, so that the problem that other internal components on the unmanned aerial vehicle are affected due to the fact that the pitching angle of the vehicle arm is too large due to external force is solved.

Description

Technical Field

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

[0002] With the continuous expansion of the application fields of drones, drones are playing an important role in all walks of life. Servo servos are arranged on the front and rear of the drone fuselage, which can drive the arms to control the pitch and tilt of the arms.

[0003] During the actual use of the drone, it is necessary to consider the control angle of the servo steering gear on the pitch and tilt of the arm to ensure that the arm can be tilted within a limited angle range; at the same time, when the drone has no flight mission, it is also necessary to limit the tilt angle of the arm to prevent external forces from causing the pitch angle of the arm to be too large, which may affect other internal components of the drone. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] To this end, the utility model provides an axial rotation limiting structure, which can enable the arm of the drone in use to tilt within a limited angle range, while also avoiding the problem of the arm affecting other internal components of the drone due to excessive pitch angles.

[0006] The utility model also provides an arm assembly including the above-mentioned axial rotation limiting structure.

[0007] The utility model also provides a drone comprising the above-mentioned axial rotation limiting structure or arm assembly.

[0008] According to an embodiment of the first aspect of the utility model, an axial rotation limiting structure is applied to an arm of a drone, comprising:

[0009] The mounting frame is used to connect with the fuselage of the UAV; the machine arm is movably connected to the mounting frame, and the machine arm can rotate axially on the mounting frame;

[0010] A first limiting portion is provided on the mounting frame;

[0011] The second limiting portion is arranged on the machine arm, and the second limiting portion can rotate with the machine arm until it contacts the first limiting portion to limit the axial rotation angle of the machine arm.

[0012] Optionally, the mounting frame comprises:

[0013] Cover plate;

[0014] A connecting plate is used to connect with the fuselage of the drone; the connecting plate is connected with the cover plate, a first limiting portion is provided on one side of the connecting plate, and the machine arm and the connecting plate are movably connected;

[0015] The second limiting portion rotates axially on the connecting plate along with the arm until it abuts against the first limiting portion on the connecting plate to limit the axial rotation angle of the arm.

[0016] Optionally, the connecting plate includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged opposite to each other, and a first limiting portion is provided on each of the first connecting plate and the second connecting plate; the machine arm can be movably connected to the first connecting plate and the second connecting plate, and a second limiting portion is provided at a position of the machine arm close to the first connecting plate and the second connecting plate;

[0017] The arm can rotate axially relative to the first connecting plate and the second connecting plate until the second limiting portion arranged near the first connecting plate abuts against the first limiting portion located on the first connecting plate and / or the second limiting portion arranged near the second connecting plate abuts against the first limiting portion located on the second connecting plate.

[0018] Optionally, a projection of the first limiting portion on the first connecting plate on the second connecting plate is symmetrically arranged with the first limiting portion on the second connecting plate;

[0019] When the second limiting portion near the first connecting plate is randomly rotated by the arm to abut against the first limiting portion on the first connecting plate for limiting position, the second limiting portion near the second connecting plate is away from the first limiting portion on the second connecting plate; when the second limiting portion near the second connecting plate is randomly rotated by the arm to abut against the first limiting portion on the second connecting plate for limiting position, the second limiting portion near the first connecting plate is away from the first limiting portion on the first connecting plate for limiting position.

[0020] Optionally, a projection of the second position limiting portion close to the first connecting plate on the second connecting plate coincides with a projection of the second position limiting portion close to the second connecting plate on the second connecting plate.

[0021] Optionally, when the second limiting portion close to the first connecting plate cooperates and abuts with the first limiting portion, the plane where the center line of the second limiting portion close to the first connecting plate and the axis of the arm are located is the first plane; when the second limiting portion close to the second connecting plate cooperates and abuts with the first limiting portion, the plane where the center line of the second limiting portion close to the second connecting plate and the axis of the arm are located is the second plane; the angle between the first plane and the second plane is 60° to 120°.

[0022] Optionally, one of the two first limiting portions is disposed on a side of the first connecting plate close to the second connecting plate, and the other of the two first limiting portions is disposed on a side of the second connecting plate close to the first connecting plate;

[0023] A second limiting portion is provided at a position of the machine arm close to the first limiting portion on the first connecting plate, and another second limiting portion is provided at a position of the machine arm close to the first limiting portion on the second connecting plate.

[0024] Optionally, a plurality of connection holes are provided on the machine arm, and the second limiting portion and the plurality of connection holes can be detachably connected.

[0025] An arm assembly according to an embodiment of the second aspect of the utility model includes the axial rotation limiting structure in the first aspect or its various implementations.

[0026] A drone according to an embodiment of the third aspect of the utility model includes the axial rotation limiting structure in the first aspect or its various implementations, or the arm assembly in the second aspect.

[0027] One of the above technical solutions has at least the following advantages or beneficial effects:

[0028] For an axial rotation limit structure of an embodiment of the utility model, by setting a first limit part on the mounting frame and a second limit part on the arm, and making the second limit part axially rotate along with the arm on the mounting frame until it contacts the first limit part, the first limit part and the second limit part can mechanically limit the axial rotation angle of the arm, so as to ensure that the arm can be tilted within the limited angle range of the first limit part and the second limit part, and avoid the problem of the arm affecting other internal components on the drone due to excessive pitch angle.

[0029] The arm assembly provided in the embodiment of the utility model is provided with the above-mentioned axial rotation limiting structure. Since the axial rotation limiting structure has the above-mentioned technical effects, the arm assembly provided with the axial rotation limiting structure should also have corresponding technical effects.

[0030] The drone provided in the embodiment of the utility model is provided with the above-mentioned axial rotation limiting structure or arm assembly. Since the axial rotation limiting structure and the arm assembly both have the above-mentioned technical effects, the drone provided with the axial rotation limiting structure or arm assembly should also have the corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an axial rotation limiting structure according to an embodiment of the present invention is shown;

[0032] Figure 2 Shows Figure 1 A top view of the axial rotation limiting structure;

[0033] Figure 3 Shows Figure 2 Sectional view at AA;

[0034] Figure 4 Shows Figure 2 Cross-sectional view at BB;

[0035] Figure 5 Shows Figure 2 Sectional view at GG;

[0036] Figure 6 A top view of another axial rotation limiting structure according to another embodiment of the present utility model is shown;

[0037] Figure 7 Shows Figure 6 Cross-sectional view at CC;

[0038] Figure 8 Shows Figure 6 Sectional view at DD;

[0039] Fig. 9 A top view of another axial rotation limiting structure according to another embodiment of the present utility model is shown;

[0040] Fig.10 Shows Fig. 9 Cross-sectional view at EE;

[0041] Fig.11 Shows Fig. 9 Cross-sectional view at FF.

[0042] [Description of Reference Numerals]

[0043] 1. Mounting frame, 101. Cover plate, 102. First connecting plate, 103. Second connecting plate;

[0044] 2. The first limiting part;

[0045] 3. The second limiting part;

[0046] 4. Machine arm, 401, machine arm shaft, 402, connecting shaft;

[0047] 5. Body. DETAILED DESCRIPTION

[0048] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0049] With the continuous expansion of the application fields of drones, drones are playing an important role in all walks of life. Two pitch and tilt functional components are arranged in the front and rear of the drone fuselage to realize the pitch and tilt of the arm. The pitch and tilt functional components drive the arm to realize the pitch and tilt of the arm by controlling the servo steering gear.

[0050] During the actual use of the UAV, it is necessary to consider the control angle of the servo steering gear on the pitch and tilt of the arm to ensure that the arm can be tilted within a limited angle range to prevent the servo steering gear from selecting an angle that is too large to control the arm, which may affect other internal components of the UAV. At the same time, when the UAV has no flight mission and is not powered on, it is also necessary to limit the tilt angle of the arm to prevent external forces from causing the pitch angle of the arm to be too large, which may affect other internal components of the UAV.

[0051] In order to solve at least one of the technical problems existing in the prior art or related technology, the utility model provides an axial rotation limit structure, by arranging a first limit part on the mounting frame and a second limit part on the arm, and making the second limit part axially rotate with the arm on the mounting frame until it contacts with the first limit part, the first limit part and the second limit part can achieve mechanical limitation of the axial rotation angle of the arm, so as to ensure that the arm of the drone in use can be tilted within the limited angle range of the first limit part and the second limit part, and avoid the problem of the arm of the drone that is not in a flight mission affecting other internal components of the drone due to excessive pitch angle.

[0052] The following describes an axial rotation limiting structure, an arm assembly, and a drone according to some embodiments of the present invention with reference to the accompanying drawings.

[0053] See also Figures 1 to 11 An axial rotation limiting structure of an embodiment provided in the first aspect of the utility model is applied to the arm 4 of a drone. The structure includes a mounting frame 1, a first limiting portion 2 and a second limiting portion 3. The mounting frame 1 is used to connect with the fuselage 5 of the drone; the arm 4 is movably connected to the mounting frame 1, and the arm 4 can rotate axially on the mounting frame 1; the first limiting portion 2 is arranged on the mounting frame 1; the second limiting portion 3 is arranged on the arm 4, and the second limiting portion 3 can rotate with the arm 4 to contact with the first limiting portion 2 to limit the axial rotation angle of the arm 4.

[0054] Here, the servo steering output shaft located on the fuselage 5 of the UAV is connected to the machine arm 4 through a belt, so that the machine arm 4 can achieve pitch and tilt under the control of the servo steering.

[0055] It should be noted that, under the cooperation of the second limiting portion 3 and the first limiting portion 2, the axial clockwise rotation angle of the arm 4 can be limited to 30°~60°, and the axial counterclockwise rotation angle of the arm 4 can be limited to 30°~60°.

[0056] For example, see Fig.10 and Fig.11When the arm 4 rotates axially clockwise to the first preset angle, the second limit portion 3 abuts against the first limit portion 2 to prevent the arm 4 from continuing to rotate clockwise, wherein the first preset angle may be 30° to 60°, and preferably, the first preset angle is 45°; for another example, see Figure 7 and Figure 8 When the arm 4 rotates axially counterclockwise to a second preset angle, the second limit portion 3 abuts against the first limit portion 2 to prevent the arm 4 from continuing to rotate clockwise, wherein the second preset angle can be 30° to 60°, and preferably, the second preset angle is 45°.

[0057] In this embodiment, by providing a first limit portion 2 on the mounting frame 1 and a second limit portion 3 on the arm 4, and allowing the second limit portion 3 to axially rotate along with the arm 4 on the mounting frame 1 until it contacts the first limit portion 2, mechanical limitation of the axial rotation angle of the arm 4 by the first limit portion 2 and the second limit portion 3 can be achieved, so as to ensure that the arm 4 of the drone in use can be tilted within the limited angle range of the first limit portion 2 and the second limit portion 3, and avoid the problem of the arm 4 not in flight mission having an excessively large pitch angle due to external force, which may affect other internal components of the drone.

[0058] In some possible embodiments, the mounting frame 1 includes a cover plate 101 and a connecting plate; the connecting plate is used to connect to the fuselage 5 of the drone; the connecting plate is connected to the cover plate 101, and a first limiting portion 2 is provided on one side of the connecting plate, and the arm 4 is movably connected to the connecting plate; the second limiting portion 3 allows the arm 4 to rotate axially on the connecting plate until it abuts against the first limiting portion 2 located on the connecting plate to limit the axial rotation angle of the arm 4.

[0059] Here, the cover plate 101 can be made of carbon fiber; the connecting plate can be detachably connected to the fuselage 5 of the drone by bolts; and the first limiting portion 2 is fixed to one side of the connecting plate by connecting to the cover plate 101 .

[0060] It should be noted that a mounting hole is provided on the connecting plate, and the machine arm 4 passes through the mounting hole and can axially rotate in the mounting hole to realize the axial rotation of the machine arm 4 on the connecting plate. In addition, the second limiting portion 3 on the machine arm 4 is provided at a position where the machine arm 4 is close to the connecting plate, so that the second limiting portion 3 can axially rotate with the machine arm 4 on the connecting plate until it abuts against the first limiting portion 2 for limiting.

[0061] In some possible embodiments, the connecting plate includes a first connecting plate 102 and a second connecting plate 103, the first connecting plate 102 and the second connecting plate 103 are arranged opposite to each other, and a first limiting portion 2 is provided on the first connecting plate 102 and the second connecting plate 103; the arm 4 can be movably connected to the first connecting plate 102 and the second connecting plate 103, and a second limiting portion 3 is provided at a position of the arm 4 close to the first connecting plate 102 and the second connecting plate 103; the arm 4 can be axially rotated relative to the first connecting plate 102 and the second connecting plate 103 until the second limiting portion 3 arranged close to the first connecting plate 102 abuts against the first limiting portion 2 located on the first connecting plate 102 for limiting, and / or the second limiting portion 3 arranged close to the second connecting plate 103 abuts against the first limiting portion 2 located on the second connecting plate 103 for limiting.

[0062] Exemplarily, the first limit portion 2 provided on the first connecting plate 102 is the limit portion A, the second limit portion 3 provided on the second connecting plate 103 is the limit portion B, the second limit portion 3 provided at the position of the arm 4 close to the first connecting plate 102 is the limit portion C, and the second limit portion 3 provided at the position of the arm 4 close to the second connecting plate 103 is the limit portion D; the arm 4 is axially rotated relative to the first connecting plate 102 and the second connecting plate 103 until the limit portion C abuts against the limit portion A for a limit, and / or the limit portion D abuts against the first limit portion 2 located on the second connecting plate 103 for a limit, so as to limit the axial rotation of the arm 4 on the mounting frame 1.

[0063] In this embodiment, the arm 4 can be movably connected with the first connecting plate 102 and the second connecting plate 103, so that the arm 4 can be stably installed on the mounting frame 1, and then a first limiting portion 2 is provided on the first connecting plate 102 and the second connecting plate 103, and a second limiting portion 3 is provided at the position of the arm 4 close to the first connecting plate 102 and the second connecting plate 103, so as to limit the axial rotation angle of the arm 4 by the second limiting portion 3 arranged close to the first connecting plate 102 abutting against the first limiting portion 2 located on the first connecting plate 102, and / or the second limiting portion 3 arranged close to the second connecting plate 103 abutting against the first limiting portion 2 located on the second connecting plate 103.

[0064] In some possible implementations, such as Figures 6 to 11The projection of the first limiting portion 2 on the first connecting plate 102 on the second connecting plate 103 is symmetrically arranged with the first limiting portion 2 on the second connecting plate 103; when the second limiting portion 3 close to the first connecting plate 102 is randomly rotated by the arm 4 to abut against the first limiting portion 2 on the first connecting plate 102 for limiting position, the second limiting portion 3 close to the second connecting plate 103 is away from the first limiting portion 2 on the second connecting plate 103; when the second limiting portion 3 close to the second connecting plate 103 is randomly rotated by the arm 4 to abut against the first limiting portion 2 on the second connecting plate 103 for limiting position, the second limiting portion 3 close to the first connecting plate 102 is away from the first limiting portion 2 on the first connecting plate 102 for limiting position.

[0065] It should be noted that the second position limiting portion 3 close to the first connecting plate 102 and the second position limiting portion 3 close to the second connecting plate 103 are both located on the upper surface of the arm 4 .

[0066] Here, the projection of the first limiting portion 2 on the first connecting plate 102 on the second connecting plate 103 is symmetrically arranged with the first limiting portion 2 on the second connecting plate 103. Figure 7 and Figure 8 , when the random arm 4 of the second limiting portion 3 near the first connecting plate 102 rotates toward the first limiting portion 2 on the first connecting plate 102, the second limiting portion 3 near the second connecting plate 103 rotates toward and away from the first limiting portion 2 on the second connecting plate 103, so that when the random arm 4 of the second limiting portion 3 near the first connecting plate 102 rotates to abut against the first limiting portion 2 on the first connecting plate 102, the second limiting portion 3 near the second connecting plate 103 is away from the first limiting portion 2 on the second connecting plate 103; at the same time, see Fig.10 and Fig.11 When the random arm 4 of the second limiting portion 3 close to the second connecting plate 103 rotates toward the first limiting portion 2 located on the second connecting plate 103, the second limiting portion 3 close to the first connecting plate 102 rotates toward the first limiting portion 2 located away from the first connecting plate 102, so as to realize that when the random arm 4 of the second limiting portion 3 rotates to abut against the first limiting portion 2 located on the second connecting plate 103 for limiting, the second limiting portion 3 close to the first connecting plate 102 is away from the first limiting portion 2 located on the first connecting plate 102 for limiting.

[0067] It can be seen that, in this embodiment, by symmetrically arranging the projection of the first limiting portion 2 located on the first connecting plate 102 on the second connecting plate 103 and the first limiting portion 2 located on the second connecting plate 103, it is possible to limit the axial rotation angle of the arm 4 toward the first limiting portion 2 located on the first connecting plate 102 through the mating and abutting of the second limiting portion 3 close to the first connecting plate 102 with the first limiting portion 2 located on the first connecting plate 102, and to limit the axial rotation angle of the arm 4 toward the first limiting portion 2 located on the second connecting plate 103 through the mating and abutting of the second limiting portion 3 close to the second connecting plate 103 with the first limiting portion 2 located on the second connecting plate 103.

[0068] In some possible embodiments, a projection of the second position limiting portion 3 close to the first connecting plate 102 on the second connecting plate 103 coincides with a projection of the second position limiting portion 3 close to the second connecting plate 103 on the second connecting plate 103 .

[0069] Here, by making the projection of the second limiting portion 3 near the first connecting plate 102 on the second connecting plate 103 coincide with the projection of the second limiting portion 3 near the second connecting plate 103 on the second connecting plate 103, not only can the second limiting portion 3 near the second connecting plate 103 be away from the first limiting portion 2 on the second connecting plate 103 when the random arm 4 of the second limiting portion 3 near the first connecting plate 102 rotates to abut against the first limiting portion 2 on the first connecting plate 102 for a limit, and the second limiting portion 3 near the first connecting plate 102 be away from the first limiting portion 2 on the first connecting plate 102 when the random arm 4 of the second limiting portion 3 rotates to abut against the first limiting portion 2 on the second connecting plate 103 for a limit, but also the axial rotation angle of the limited limiting machine arm 4 toward the first limiting portion 2 on the first connecting plate 102 can be made the same as the axial rotation angle of the limiting machine arm 4 toward the first limiting portion 2 on the second connecting plate 103.

[0070] In some possible embodiments, when the second limiting portion 3 near the first connecting plate 102 cooperates and abuts with the first limiting portion 2, the plane where the center line of the second limiting portion 3 near the first connecting plate 102 and the axis of the arm 4 are located is the first plane; when the second limiting portion 3 near the second connecting plate 103 cooperates and abuts with the first limiting portion 2, the plane where the center line of the second limiting portion 3 near the second connecting plate 103 and the axis of the arm 4 are located is the second plane; the angle between the first plane and the second plane is 60°~120°.

[0071] Here, by selecting the angle between the first plane and the second plane to be 60°~120°, the axial clockwise rotation angle of the arm 4 can be limited to 30°~60°, and the axial counterclockwise rotation angle of the arm 4 can be limited to 30°~60°, wherein the angle between the first plane and the second plane is 90°, which is the optimal angle, so as to limit the axial clockwise rotation angle of the arm 4 to 45°, and limit the axial counterclockwise rotation angle of the arm 4 to 45°.

[0072] In some possible embodiments, one of the two first limiting portions 2 is arranged on a side of the first connecting plate 102 close to the second connecting plate 103, and the other of the two first limiting portions 2 is arranged on a side of the second connecting plate 103 close to the first connecting plate 102; a second limiting portion 3 is provided at a position of the arm 4 close to the first limiting portion 2 on the first connecting plate 102, and another second limiting portion 3 is provided at a position of the arm 4 close to the first limiting portion 2 on the second connecting plate 103.

[0073] In this embodiment, by arranging one of the two first limiting portions 2 on a side of the first connecting plate 102 close to the second connecting plate 103, and arranging the other first limiting portion 2 on a side of the second connecting plate 103 close to the first connecting plate 102, and arranging one of the two second limiting portions 3 close to the first limiting portion 2 on the first connecting plate 102, and arranging the other of the two second limiting portions 3 close to the first limiting portion 2 on the second connecting plate 103, the two first limiting portions 2 and the two second limiting portions 3 can be located between the first connecting plate 102 and the second connecting plate 103, thereby hiding the axial rotation limiting structure in the mounting frame 1.

[0074] In some possible embodiments, the machine arm 4 is provided with a plurality of connection holes, and the second limiting portion 3 can be detachably connected to the plurality of connection holes.

[0075] Here, the plurality of connection holes are distributed on the arm 4 near the first limiting portion 2 , and the plurality of connection holes are distributed on the outer peripheral side of the same cross section of the arm 4 .

[0076] A machine arm assembly according to an embodiment of the second aspect of the utility model comprises a machine arm and an axial rotation limiting structure in any one of the above embodiments.

[0077] Since the arm assembly includes any axial rotation limiting structure in the first aspect described above, it has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0078] Optionally, the machine arm 4 includes two machine arm shafts 401 and a connecting shaft 402 , and the two machine arm shafts 401 are arranged back to back; the connecting shaft 402 is sleeved on the two machine arm shafts 401 and fixedly connected to the two machine arm shafts 401 .

[0079] It should be noted that the second limiting portion 3 may be a bolt that can be detachably connected to the machine arm 4 .

[0080] Here, by designing the machine arm 4 as a three-section structure of the connecting shaft 402 and the two machine arms 4, it is possible to facilitate the segmented processing of the machine arm 4 and the assembly of the machine arm 4. After the two machine arms 4 are axially arranged back to back and the connecting shaft 402 is sleeved on the two machine arm shafts 401, the connecting shaft 402 is fixed to the two machine arm shafts 401 by bolts to achieve a fixed connection between the connecting shaft 402 and the two machine arm shafts 401.

[0081] A third aspect of the present invention provides an unmanned aerial vehicle in one embodiment, comprising the axial rotation limiting structure in any of the above embodiments, or the arm assembly in any of the above embodiments.

[0082] Since the drone includes any axial rotation limiting structure in the first aspect or the arm assembly in the third aspect, it has the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0083] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may 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, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0086] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "exemplary embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0087] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An axial rotation limiting structure, applied to the arm of a drone, characterized in that: include: A mounting frame, used to be connected to the fuselage of the UAV; the machine arm is movably connected to the mounting frame, and the machine arm can axially rotate on the mounting frame; A first limiting portion, provided on the mounting frame; The second limiting portion is arranged on the machine arm, and the second limiting portion can rotate with the machine arm until it contacts the first limiting portion to limit the axial rotation angle of the machine arm.

2. The axial rotation limiting structure according to claim 1, characterized in that: The mounting frame comprises: Cover plate; A connecting plate, used to connect with the fuselage of the drone; the connecting plate is connected with the cover plate, one side of the connecting plate is provided with the first limiting portion, and the machine arm is movably connected with the connecting plate; The second limiting portion rotates axially on the connecting plate along with the machine arm until it abuts against the first limiting portion on the connecting plate to limit the axial rotation angle of the machine arm.

3. The axial rotation limiting structure according to claim 2, characterized in that: The connecting plate comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged opposite to each other, and the first connecting plate and the second connecting plate are both provided with a first limiting portion; the machine arm is movably connected to the first connecting plate and the second connecting plate, and the machine arm is provided with a second limiting portion at a position close to the first connecting plate and the second connecting plate; The arm can rotate axially relative to the first connecting plate and the second connecting plate until the second limiting portion arranged close to the first connecting plate abuts against the first limiting portion located on the first connecting plate and / or the second limiting portion arranged close to the second connecting plate abuts against the first limiting portion located on the second connecting plate and is limited.

4. The axial rotation limiting structure according to claim 3, characterized in that: The projection of the first limiting portion on the first connecting plate on the second connecting plate is symmetrically arranged with the first limiting portion on the second connecting plate; When the second limiting portion close to the first connecting plate rotates with the machine arm to abut and limit with the first limiting portion on the first connecting plate, the second limiting portion close to the second connecting plate moves away from the first limiting portion on the second connecting plate; when the second limiting portion close to the second connecting plate rotates with the machine arm to abut and limit with the first limiting portion on the second connecting plate, the second limiting portion close to the first connecting plate moves away from the first limiting portion on the first connecting plate for abutment and limit.

5. The axial rotation limiting structure according to claim 4, characterized in that: A projection of the second position-limiting portion close to the first connecting plate on the second connecting plate coincides with a projection of the second position-limiting portion close to the second connecting plate on the second connecting plate.

6. The axial rotation limiting structure according to claim 5, characterized in that: When the second limiting portion close to the first connecting plate cooperates and abuts with the first limiting portion, the plane where the center line of the second limiting portion close to the first connecting plate and the axis of the arm are located is the first plane; when the second limiting portion close to the second connecting plate cooperates and abuts with the first limiting portion, the plane where the center line of the second limiting portion close to the second connecting plate and the axis of the arm are located is the second plane; the angle between the first plane and the second plane is 60° to 120°.

7. The axial rotation limiting structure according to claim 3, characterized in that: One of the two first limiting portions is disposed on a side of the first connecting plate close to the second connecting plate, and the other of the two first limiting portions is disposed on a side of the second connecting plate close to the first connecting plate; A second limiting portion is provided at a position of the machine arm close to the first limiting portion on the first connecting plate, and another second limiting portion is provided at a position of the machine arm close to the first limiting portion on the second connecting plate.

8. The axial rotation limiting structure according to any one of claims 1 to 7, characterized in that: The machine arm is provided with a plurality of connection holes, and the second limiting portion is detachably connected to the plurality of connection holes.

9. An arm assembly, characterized in that: It comprises a machine arm and an axial rotation limiting structure as claimed in any one of claims 1 to 7.

10. A drone, characterized in that: It comprises the axial rotation limiting structure as described in any one of claims 1 to 8, or the arm assembly as described in claim 9.

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