CN214608062U

CN214608062U - Arm and unmanned aerial vehicle

Info

Publication number: CN214608062U
Application number: CN202023240532.2U
Authority: CN
Inventors: 梁杰; 吴旭民
Original assignee: Guangzhou Xaircraft Technology Co Ltd
Current assignee: Guangzhou Xaircraft Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-05
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to a horn and an unmanned aerial vehicle, wherein the horn comprises a fixing mechanism, a main arm and a locking mechanism, the main arm is pivoted with the fixing mechanism and can be switched between a folding position and an unfolding position; the locking mechanism comprises a lock catch and a first elastic piece, wherein a clamping surface is arranged on the lock catch, and the clamping surface is provided with a first end and a second end which are oppositely arranged; the lock catch is pivoted with the main arm through a first pivoting shaft, and the fixing mechanism is connected with a locking shaft; when the main arm is in the unfolding position, the lock catch is clamped into the locking shaft from the first end, the clamping surface is abutted against the locking shaft, the first elastic piece drives the lock catch to rotate all the time and enables the locking shaft to approach the second end, and the vertical distance between the clamping surface and the first pivot shaft is reduced from the side of the first end to the side of the second end. When the main arm tends to rotate in a small angle due to vibration, the clamping surface can enable the lock catch to have larger and larger pulling force on the first pivot shaft and the locking shaft, so that the main arm is locked, and the rotation of the main arm is effectively avoided.

Description

Arm and unmanned aerial vehicle

Technical Field

The utility model relates to an unmanned air vehicle technique field especially relates to a horn and unmanned aerial vehicle.

Background

In recent years, along with the development of unmanned aerial vehicles, the unmanned aerial vehicles attract attention in many ways due to the advantages of flexibility, quick response, unmanned flight, low operation requirement and the like, and are applied to multiple fields such as agriculture and exploration.

Unmanned aerial vehicle includes the fuselage usually and from a plurality of horn of fuselage outwards extension, and the horn is provided with one or more power device on keeping away from the end of fuselage, and this power device rotates and can drive unmanned aerial vehicle flight, however, unmanned aerial vehicle outwards extension's horn can increase unmanned aerial vehicle's volume, is unfavorable for the user portable. Therefore, an unmanned aerial vehicle with foldable arms is designed.

Because after the horn expandes, power device can take place vibrations when the pivoted, power device's vibrations will be transmitted to on the horn, power device's vibrations can lead to the horn to take place vibrations, among the prior art, the folding unmanned aerial vehicle's of horn connection structure design is unreasonable, the vibrations of horn can lead to the horn to take place the rotation of small angle, the rotation of horn is in turn can lead to power device's position to change, and then lead to unmanned aerial vehicle flight unstability, user experience is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a horn to when the main arm is in the expansion position, avoid the main arm to take place to rotate.

To achieve the purpose, the utility model adopts the following technical proposal:

a horn, comprising:

the fixing mechanism is used for connecting with the machine body;

the main arm is pivoted with the fixing mechanism and can be switched between a folding position and an unfolding position;

the locking mechanism comprises a lock catch and a first elastic piece, wherein a clamping surface is arranged on the lock catch, and the clamping surface is provided with a first end and a second end which are oppositely arranged;

the lock catch is pivoted with the main arm through a first pivoting shaft, and the fixing mechanism is connected with a locking shaft; when the main arm is located at the unfolding position, the lock catch is clamped into the locking shaft from the first end, the clamping surface is abutted against the locking shaft, the first elastic piece drives the lock catch to rotate all the time and enables the locking shaft to approach the second end, and the vertical distance between the clamping surface and the first pivot shaft is reduced from the side of the first end to the side of the second end.

Preferably, the central axis of the first pivot shaft and the central axis of the locking shaft are located on the same plane S₁The clamping surface and the plane S₁The included angle alpha is 90-110 degrees.

Preferably, the fixing mechanism is connected with a second pivot shaft, and the main arm is pivoted with the fixing mechanism through the second pivot shaft;

the central axis of the locking shaft and the central axis of the second pivot shaft are positioned on the same plane S₂Said plane S₁And the plane S₂And is vertical.

Preferably, the lock catch is provided with a matching groove, the lock holding shaft is clamped in the matching groove, and the clamping surface is a groove wall of the matching groove far away from the first pivot shaft.

Preferably, a groove is formed in one end, close to the clamping surface, of the groove bottom of the matching groove, and the groove can accommodate the locking shaft.

Preferably, the fixing mechanism includes:

the connecting substrate is used for being connected with the machine body; and

two fixing lugs connected to one side of the connecting base plate at intervals and extending to the side of the main arm;

the main arm includes:

a main arm body; and

the two movable lugs are connected to one end of the main arm body at intervals, the two fixed lugs are arranged between the two movable lugs, and the two fixed lugs and the two movable lugs are pivoted through the second pivoting shaft.

Preferably, one of the outer side of at least one of the fixed lugs and the inner side of at least one of the movable lugs is provided with a positioning protrusion, and the other one of the fixed lugs and the inner side of at least one of the movable lugs is provided with a first positioning groove.

Preferably, the other of the outer side of the fixed lug and the inner side of the movable lug is further provided with a second positioning groove, and when the main arm is located at the unfolding position, the positioning protrusion is inserted into the second positioning groove.

Preferably, the horn further comprises:

and the second elastic piece is sleeved outside the second pivot shaft, and two ends of the second elastic piece are respectively abutted against the inner sides of the two fixing lugs.

Another object of the utility model is to provide an unmanned aerial vehicle to improve unmanned aerial vehicle's stability.

an unmanned aerial vehicle, includes foretell horn.

The utility model has the advantages that:

the utility model provides a machine arm, which comprises a fixing mechanism, a main arm and a locking mechanism, wherein the main arm is pivoted with the fixing mechanism and can be switched between a folding position and an unfolding position; the locking mechanism comprises a lock catch and a first elastic piece, a clamping surface is arranged on the lock catch, the lock catch is pivoted with the main arm through a first pivoting shaft, and a locking shaft is connected to the fixing mechanism; when the main arm is in the unfolding position, the lock catch is clamped into the locking shaft from the first end of the clamping surface and enables the clamping surface to be in butt joint with the locking shaft, the first elastic piece drives the lock catch to rotate all the time and enables the locking shaft to be close to the second end, and the vertical distance between the clamping surface and the first pivot shaft is gradually reduced from the side where the first end is located at the second end. Because the first pivot shaft is arranged on the main arm, when the main arm tends to rotate in a small angle due to vibration, the lock catch can rotate from the side of the first end to the side of the second end under the action of the first elastic piece, so that the lock catch 31 is prevented from being separated from the locking shaft 24, and the vertical distance between the clamping surface and the first pivot shaft is gradually reduced from the side of the first end to the side of the second end, so that the inclined clamping surface can make the lock catch have larger and larger tension on the first pivot shaft and the locking shaft, further the main arm is locked, and the rotation of the main arm is effectively avoided. Meanwhile, the vertical distance between the clamping surface and the first pivot shaft is gradually reduced from the first end to the second end, namely, the clamping surface forms an inclined surface relative to the first pivot shaft, so that the lock catch can be easily clamped into the locking shaft when the machine arm rotates from the folding state to the unfolding state.

Drawings

Fig. 1 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present invention, in which a horn is in an expanded state;

fig. 2 is a schematic structural diagram of an unmanned aerial vehicle according to an embodiment of the present invention, in which a boom is folded;

fig. 3 is a cross-sectional view of a portion of an unmanned aerial vehicle provided by an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fixing mechanism provided in an embodiment of the present invention;

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

fig. 6 is a cross-sectional view of a portion of a horn provided in an embodiment of the present invention;

fig. 7 is an exploded view of a horn provided by an embodiment of the present invention;

FIG. 8 shows a clamping surface and a plane S according to an embodiment of the present invention₁When the included angle alpha is 90 degrees, the stress analysis schematic diagram of the lock catch is shown;

FIG. 9 shows a clamping surface and a plane S according to an embodiment of the present invention₁When the included angle is more than or equal to 110 degrees and more than or equal to alpha and more than 90 degrees, the stress analysis schematic diagram of the lock catch is shown;

fig. 10 is a schematic structural view of a lock catch according to an embodiment of the present invention.

In the figure:

10. a body; 20. a horn; 201. a support arm; 30. a foot rest; 40. a power assembly;

1. a main arm; 11. positioning the projection; 12. a first pivot shaft; 13. a movable lug; 14. a main arm body; 141. a lower dodging port; 142. mounting grooves;

2. a fixing mechanism; 21. a second pivot shaft; 22. connecting the substrates; 221. a limiting surface; 23. a fixing lug; 232. a first positioning groove; 233. a second positioning groove; 24. a locking shaft;

3. a locking mechanism; 31. locking; 311. a fastening part; 312. a pivot part; 313. a handle part is buckled; 314. a groove; 315. a clamping surface; 316. a first end; 317. a second end; 318. a mating groove; 32. a first elastic member;

4. a second elastic member; 41. a wire accommodating groove;

5. a locking member; 51. a first part; 52. a second section; 53. a third section; 54. and the upper part avoids the opening.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

The present invention is limited to certain orientation words, and when no opposite explanation is given, the used orientation words are "upper", "lower", "left", "right", "inner" and "outer", and these orientation words are adopted for easy understanding, and therefore do not constitute a limitation to the scope of the present invention.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the present embodiment provides a drone that may be used for operations such as geographic mapping. Of course, this unmanned aerial vehicle also can be used to other fields such as the photography of taking photo by plane, electric power is patrolled and examined, environmental monitoring and disaster patrol.

Referring to fig. 1-2, the unmanned aerial vehicle of the embodiment of the present invention includes a body 10, a boom 20, a foot rest 30, and a power assembly 40. In this embodiment, the unmanned aerial vehicle is a quad-rotor unmanned aerial vehicle, and therefore, the number of power assemblies 40 is four, and four power assemblies 40 are distributed in the rectangular area around the fuselage 10 through the support of the horn 20, and each power assembly 40 is located on one vertex of the rectangle.

Referring to fig. 1 to 2, a foot stand 30 is provided at a lower end of a power assembly 40, and the power assembly 40 is used to provide flying power to the unmanned aerial vehicle 100. The power assembly 40 includes a motor and a propeller connected to the motor. Preferably, the screw can be collapsible oar, and when unmanned aerial vehicle did not fly, the screw can be folded to reduce unmanned aerial vehicle's volume, be convenient for accomodate and transport.

Of course, the number of the power assemblies 40 may be changed according to different requirements, for example, the number of the power assemblies 40 may be two, three, six, etc., even the number of the power assemblies 40 may be only one, and accordingly, the number of the horn 20 may also be set reasonably according to the number of the power assemblies 40.

According to different application fields of the unmanned aerial vehicle, other loads capable of realizing specific tasks can be carried on the body 10, for example, when the unmanned aerial vehicle is used for aerial photography or surveying and mapping, the body 10 can be carried with shooting equipment provided with a stability-increasing cradle head; when the unmanned aerial vehicle is used for competitive games, the fuselage 10 can carry game devices and the like.

Fuselage 10 holds carrier for unmanned aerial vehicle, on fuselage 10 or inside can set up installation line module, flight control module, circuit mainboard, communication module and battery electronic component. In this embodiment, the fuselage 10 is the frame construction that is located the unmanned aerial vehicle middle part position that forms by the support overlap joint.

With continued reference to fig. 1-2, the body 10 may also be provided with an enclosure that protects the body 10 or the electronic components disposed therein. Further, the shape of the housing is preferably designed to reduce air resistance during flight, and the housing may be, for example, a streamline shape, a circular shape, an oval shape, or the like.

As shown in fig. 2, the horn 20 is rotatably coupled to a side portion of the body 10. The horn 20 is used to support the power assembly 40 and to distribute the power assembly 40 around the fuselage 10 in a predetermined pattern. Since the horn 20 is rotatably coupled to the side of the body 10, the horn 20 can be adjusted to the folded state and the unfolded state with respect to the body 10.

As shown in fig. 1, the horn 20 includes a main arm 1 and a support arm 201 connected to the main arm 1. The main arm 1 has one end rotatably connected to the body 10 and the other end connected to the arm 201. In the present embodiment, the main arm 1 and the arm 201 are substantially connected to each other in a "T" shape.

Specifically, the number of the main arms 1 is two, the two main arms 1 are respectively connected to two opposite sides of the main body 10, each main arm 1 is connected to two support arms 201, and the two support arms 201 are coaxially arranged and respectively located at two sides of the main arm 1. The arm 201 fixes the end of the main arm 1 away from the main body 10 by a connecting sleeve. Furthermore, the connecting sleeve is provided with a line passing hole communicated with the main arm 1, a navigation lamp is arranged on the outer wall of the connecting sleeve, the navigation lamp is fixed on the connecting sleeve through a navigation lamp shell, and the line passing hole is used for enabling the navigation lamp to pass through.

Further, the arm 201 is connected to the main arm 1 at a substantially middle position, and the arm 201 is substantially perpendicular to the main arm 1. The support arm 201 has two ends respectively forming a mounting seat, the power assembly 40 is mounted on the upper side of the mounting seat, and the foot stand 30 is arranged on the lower side of the mounting seat.

It is to be understood that the connection manner between the arm 201 and the main arm 1 is not limited to the illustrated embodiment, and for example, the arm 201 may not be perpendicular to the main arm 1, and the end of the arm 201 may be connected to the main arm 1. The number of the main arms 1 and the corresponding support arms 201 may also vary according to specific requirements, for example, the number of the main arms 1 may be three, four or more.

In this embodiment, the two main arms 1 are integrally connected, whereby the main arms 1 represent an integral elongated arm, although in other embodiments the main arms 1 may be formed by two or more parts.

As shown in fig. 3, in order to rotatably connect the main arm 1 to the main body 10, the horn 20 further includes a fixing mechanism 2, the fixing mechanism 2 is connected to the main body 10, the main arm 1 is pivotally connected to the fixing mechanism 2, and the main arm 1 can be switched between the folded position and the unfolded position, so that the horn 20 can be switched between the folded state and the unfolded state. In order to enable the main arm 1 to be stably rotated to a folded state or an unfolded state with respect to the fixing mechanism 2, a second pivot shaft 21 is connected to the fixing mechanism 2, and the main arm 1 is pivotally connected to the fixing mechanism 2 through the second pivot shaft 21.

In order to pivotally connect the main arm 1 to the fixing mechanism 2 through the second pivot shaft 21, specifically, as shown in fig. 4, the fixing mechanism 2 includes a connecting base plate 22 and two fixing lugs 23, the two fixing lugs 23 are connected to one side of the connecting base plate 22 at intervals and extend to the side of the main arm 1, and the connecting base plate 22 is connected to the main body 10, so that the main arm 20 is connected to the main body 10. Specifically, the connection substrate 22 is fixedly connected to the body 10 by screws or the like. As shown in fig. 5, the main arm 1 includes a main arm body 14 and two movable lugs 13, the two movable lugs 13 are connected to one end of the main arm body 14 at intervals, two fixed lugs 23 are disposed between the two movable lugs 13, and the two fixed lugs 23 and the two movable lugs 13 are pivotally connected by a second pivot shaft 21. As shown in fig. 4 and 5, in particular, the two movable lugs 13 and the two fixed lugs 23 are coaxially provided with shaft holes to pass the second pivot shaft 21.

As shown in fig. 4 and 6, it is preferable that the side of the connection base plate 22 adjacent to the main arm 1 has a stopper surface 221, the stopper surface 221 is located on the upper side of the two fixing lugs 23, and when the main arm 1 is located at the deployed position, the end surface of the main arm 1 abuts on the stopper surface 221, thereby restricting the rotation of the main arm 1 in the counterclockwise direction. Since the position of the fixing mechanism 2 is fixed, when the main arm 1 is located at the deployed position, even if the main arm 1 vibrates, the main arm 1 does not rotate counterclockwise by the stopper of the stopper surface 221.

As shown in fig. 1 to 3, if the main arm 1 is connected to the fixing mechanism 2 only by the second pivot shaft 21, when the main arm 1 is in the unfolded state, the main arm 1 will rotate clockwise to the folded state under the action of the gravity of the main arm 1, and therefore, as shown in fig. 3 and 6, the present embodiment provides the arm 20 further including the locking mechanism 3, and the locking mechanism 3 can keep the main arm 1 in the unfolded position without the intervention of the operator.

Specifically, as shown in fig. 6 and 7, the locking mechanism 3 includes a latch 31 and a first elastic member 32, the latch 31 is pivotally connected to the main arm 1 via a first pivot shaft 12, the fixing mechanism 2 is connected to a locking shaft 24, and when the main arm 1 is in the unfolded position, the first elastic member 32 drives the latch 31 to rotate, so that the latch 31 is engaged with the locking shaft 24, and the main arm 1 is in the unfolded position.

After horn 20 expandes, after power device began work, power device can take place vibrations, and power device's vibrations will be transmitted to on horn 20, lead to horn 20 to take place vibrations, because locking mechanical system 3 among the prior art's locking ability is limited, horn 20's vibrations can lead to main arm 1 anticlockwise rotation less angle, and main arm 1's rotation can lead to power device's position to change again, and then lead to unmanned aerial vehicle flight unstability, cause the potential safety hazard.

To solve the above technical problem, as shown in fig. 6, the latch 31 is provided with a latch surface 315 abutting against the latch shaft 24, the latch surface 315 has a first end 316 and a second end 317 which are oppositely arranged, when the main arm 1 is at the unfolding position, the latch 31 is latched into the latch shaft 24 by the first end 316 and the latch surface 315 abuts against the latch shaft 24, the first elastic member 32 always drives the latch 31 to rotate and the latch shaft 24 is drawn towards the second end 317, and the vertical distance between the latch surface 315 and the first pivot shaft 12 is reduced from the side where the first end 316 is located to the side where the second end 317 is located. Specifically, in the embodiment, the first end 316 is disposed close to the second pivot shaft 21, the second end 317 is disposed at a side of the first end 316 away from the second pivot shaft 21, and the lock latch 31 rotates counterclockwise to gradually lock the locking shaft 24. Of course, in other embodiments, the second end 317 is disposed close to the second pivot shaft 21, the first end 316 is disposed at a side of the second end 317 away from the second pivot shaft 21, and the clockwise rotation of the lock 31 can gradually lock the locking shaft 24. Furthermore, one end of the latch 31 forms a hook structure, the fastening surface 315 is disposed inside the hook structure, the first end 316 and the second end 317 are disposed at two ends of the fastening surface 315 of the hook, the first end 316 is located at the top end of the hook structure, and the second end 317 is located at the bottom end of the hook structure.

Because the first pivot shaft 12 is disposed on the main arm 1, when the main arm 1 tends to rotate counterclockwise by a small angle due to vibration, under the action of the first elastic element 32, the latch 31 will rotate from the side where the first end 316 is located to the side where the second end 317 is located, so as to prevent the latch 31 from disengaging from the locking shaft 24, and because the vertical distance between the latch surface 315 and the first pivot shaft 12 is gradually reduced from the side where the first end 316 is located to the side where the second end 317 is located, the inclined latch surface 315 will make the latch 31 pull the first pivot shaft 12 and the locking shaft 24 more and more stronger, thereby locking the main arm 1, and effectively preventing the main arm 1 from rotating counterclockwise. Meanwhile, the vertical distance between the engaging surface 315 and the first pivot shaft 12 gradually decreases from the first end 316 to the second end 317, that is, the engaging surface 315 forms an inclined surface with respect to the first pivot shaft 12, so that the latch 31 can be easily engaged with the locking shaft 24 when the arm 1 rotates from the folded state to the unfolded state.

As shown in FIG. 6, the central axis of the first pivot shaft 12 and the central axis of the locking shaft 24 are located on the same plane S₁Clamping surface 315 and plane S₁Is 90-110, such as 90, 95, 98, 100, 102, 105, 108, 110, or other values. The included angle alpha is within the angle range, so that the rotation of the main arm 1 at a small angle due to the vibration of the unmanned aerial vehicle can be effectively avoided, and the lock catch 31 can be easily clamped into the machine arm 1 when the machine arm rotates from the folded state to the unfolded stateWithin the lock shaft 24.

As shown in fig. 8, when α is 90 °, the first elastic element 32 drives the lock catch 31 to rotate until the elastic force engaging with the lock holding shaft 24 is F1, and the direction of the elastic force F1 is parallel to the tangential direction of the rotation direction of the lock catch 31 and is parallel to the plane S₁And is vertical. The pressing force of the locking shaft 24 on the locking buckle 31 is F2, the pressing force F2 is perpendicular to the clamping surface 315, because the clamping surface 315 is in contact with the plane S₁Therefore, the pressing force F2 is perpendicular to the elastic force F1, the pressing force F2 has no component force parallel to the direction of the elastic force F1, the pressing force F2 does not counteract the elastic force F1, and even if the pressing force F2 of the lock holding shaft 24 to the lock catch 31 is increased due to the vibration of the machine arm 20, the pressing force F2 does not counteract the clamping effect of the lock catch 31 to the lock holding shaft 24, so that the main arm 1 can be kept from rotating.

As shown in fig. 9, when 110 ° ≧ α > 90, the included angle between the pressure force F2 and the opposite direction of the elastic force F1 is 20 ° ≧ α -90 ° > 0, the pressure force F2 of the locking shaft 24 to the locking buckle 31 is decomposed into F22 and the acting force F21 along the opposite direction of the elastic force F1, at this time, F21 is smaller, and therefore, the increase of F2 and the offset of F1 are smaller, and therefore, the influence on the locking effect of the locking shaft 24 is small because the increase of the pressure force F2 of the locking buckle 31 by the locking shaft 24 caused by the vibration of the arm 20, so that the main arm 1 can be kept from rotating.

Therefore, the present embodiment provides the horn 20 by engaging the engaging surface 315 with the plane S₁The included angle alpha is 90-110 degrees, so that the main arm 1 cannot rotate due to the vibration of the horn 20, the position of the power device is kept stable, and the stable flight of the unmanned aerial vehicle is further ensured.

As shown in fig. 6, in order to further improve the stability of the arm 20, it is preferable that the central axis of the locking shaft 24 and the central axis of the second pivot shaft 21 are located on the same plane S₂Plane S₁And plane S₂The vertical, i.e. the locking shaft 24, the first pivot 12 and the second pivot 21 are distributed at the three vertices of the right triangle. Because the locking shaft 24, the first pivot shaft 12 and the second pivot shaft 21 are all connected with the main arm 1, the stability of the main arm 1 can be further improved by distributing the locking shaft 24, the first pivot shaft 12 and the second pivot shaft 21 on three vertexes of the right triangle, and the main arm 1 is prevented from rotating.

As shown in fig. 7, specifically, the first elastic element 32 is a torsion spring, the torsion spring is sleeved outside the first pivot shaft 12, one torsion arm of the torsion spring is connected to the main arm 1, and the other torsion arm is connected to the latch 31. Under the condition that the arm is unfolded, the torsion spring can always drive the lock catch 31 to rotate to be clamped with the locking shaft 24.

To realize the locking of the lock catch 31 and the lock holding shaft 24, as shown in fig. 7 and 10, the lock catch 31 is provided with a matching groove 318, the lock holding shaft 24 is locked in the matching groove 318, and the locking surface 315 is a groove wall of the matching groove 318 away from the first pivot shaft 12.

Specifically, the latch 31 includes a locking portion 311 and a pivoting portion 312 connected at an included angle, the pivoting portion 312 is pivoted to the first pivoting shaft 12, wherein the locking portion 311 and the pivoting portion 312 enclose the engaging groove 318, and a side of the locking portion 311 facing the pivoting portion 312 is the locking surface 315. To realize the pivotal connection between the latch 31 and the first pivotal shaft 12, the pivotal portion 312 is provided with a shaft hole, so that the first pivotal shaft 12 is disposed through the pivotal portion 312.

In order to prevent the locking shaft 24 from being separated from the latch portion 311 when the main arm 1 is severely vibrated, a groove 314 is formed at one end of the bottom of the mating groove 318 close to the latch surface 315, and the groove 314 can accommodate the locking shaft 24. When the lock shaft 24 is located in the recess 314, the lock 31 moves to the extreme position, thereby preventing the main arm 1 from suddenly switching to the folded position due to a violent vibration.

Further, in order to facilitate the operator to drive the latch 31 to rotate so as to disengage the latch 31 from the locking shaft 24, the latch 31 further includes a handle portion 313, and the handle portion 313 is connected to one end of the pivot portion 312, which is far away from the latch portion 311, and forms an included angle with the pivot portion 312. As shown in fig. 6, in the present embodiment, the latch hand 313 is pressed downward, the latch 31 rotates counterclockwise, and is disengaged from the latch shaft 24, and the main arm 1 can rotate to the folded position.

To facilitate the installation of the lock catch 31, as shown in fig. 7, the upper end of the main arm body 14 is provided with a lower avoiding opening 141, the upper end of the sidewall of the lower avoiding opening 141 is provided with an installation groove 142 for clamping the two ends of the first pivot shaft 12, the first pivot shaft 12 is inserted into the first elastic member 32 and the pivot portion 312, and then the lock catch 31 is installed into the main arm 1 through the lower avoiding opening 141 and the two ends of the first pivot shaft 12 are clamped into the installation groove 142. In order to prevent the first pivot shaft 12 from coming out of the mounting groove 142, the lower avoiding opening 141 is covered with a locking member 5, the locking member 5 includes a first portion 51, a second portion 52 and a third portion 53 which are vertically connected in sequence, the third portion 53 is used for connecting the first portion 51 and the third portion 53, and the first portion 51 and the second portion 52 are pressed against two ends of the first pivot shaft 12. The first portion 51, the second portion 52, and the third portion 53 enclose an upper escape opening 54 through which the gripping portion 313 passes.

In order to stably maintain the main arm 1 in the folded position when the main arm 1 is rotated to the folded position, as shown in fig. 4 and 5, it is preferable that the outer sides of the two fixing lugs 23 are each opened with a first positioning groove 232, the inner sides of the two movable lugs 13 are provided with a positioning protrusion 11, and the positioning protrusion 11 is inserted into the first positioning groove 232 when the main arm 1 is rotated to the folded position. It is understood that the outer side of the two fixing lugs 23 refers to a side of the two fixing lugs 23 away from each other, and the inner side of the two movable lugs 13 refers to a side of the two movable lugs 13 close to each other.

When the main arm 1 rotates from the folded position to the unfolded position, in order to enable an operator not to hold the main arm 1, the main arm 1 can be temporarily kept at the unfolded position, so that the operator can operate the lock catch 31 conveniently, the second positioning grooves 233 are formed in the outer sides of the two fixing lugs 23, and when the main arm 1 is located at the unfolded position, the positioning protrusions 11 are inserted into the second positioning grooves 233, so that the main arm 1 can be kept at the unfolded position without being affected by external force.

Of course, in other embodiments, the first positioning groove 232 and the second positioning groove 233 may be formed on the outer side of only one fixing lug 23, and only one positioning protrusion 11 may be correspondingly formed. In other embodiments, the positioning protrusion 11 may be disposed on the outer side of the fixed lug 23, and the first positioning groove 232 and the second positioning groove 233 may be disposed on the movable lug 13.

When the horn 20 is located at the middle position between the unfolding position and the folding position, the positioning protrusion 11 is located between the first positioning groove 232 and the second positioning groove 233, because the positioning protrusion 11 can be inserted into the first positioning groove 232 and the second positioning groove 233, when the positioning protrusion 11 rotates between the first positioning groove 232 and the second positioning groove 233, the two fixing lugs 23 are inevitably extruded, and therefore, the two fixing lugs 23 are prevented from being extruded for a long time and cannot be recovered, the horn 20 further comprises a second elastic member 4, the second elastic member 4 is sleeved outside the second pivot shaft 21, and two ends of the second elastic member 4 are respectively abutted against the inner sides of the two fixing lugs 23, so that sufficient recovery force is provided for the two fixing lugs 23. Preferably, the second elastic member 4 is made of rubber, but the second elastic member 4 may also be a spring or the like.

Since the line from the body 10 to the power device passes through between the two fixed lugs 23, in order to avoid the two movable lugs 13 from wearing the line during rotation, preferably, a line accommodating groove 41 is formed along the circumference of the second elastic member 4, and the line accommodating groove 41 is used for accommodating the line. The wires are confined in the wire receiving slots 41 and therefore do not move into contact with the movable lugs 13, thereby avoiding the movable lugs 13 from wearing the wires during rotation.

Furthermore, in order to avoid the line abrasion of the line accommodating groove 41, the side wall and the bottom wall of the line accommodating groove 41 are in smooth transition connection, and no sharp corner exists on the inner wall of the line accommodating groove 41, so that the line abrasion can be effectively avoided.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A horn, comprising:

the fixing mechanism (2) is used for being connected with the machine body (10);

a main arm (1) which is pivoted to the fixing mechanism (2) and can be switched between a folded position and an unfolded position;

the locking mechanism (3) comprises a lock catch (31) and a first elastic piece (32), wherein a clamping surface (315) is arranged on the lock catch (31), and the clamping surface (315) is provided with a first end (316) and a second end (317) which are oppositely arranged;

the lock catch (31) is pivoted with the main arm (1) through a first pivoting shaft (12), and the fixing mechanism (2) is connected with a locking shaft (24); when the main arm (1) is located at the unfolding position, the lock catch (31) is clamped into the locking shaft (24) through the first end (316) and enables the clamping surface (315) to be abutted against the locking shaft (24), the first elastic piece (32) drives the lock catch (31) to rotate all the time and enables the locking shaft (24) to be close to the second end (317), and the vertical distance between the clamping surface (315) and the first pivot shaft (12) is reduced from the side where the first end (316) is located to the side where the second end (317) is located.

2. A boom according to claim 1, characterised in that the centre axis of the first pivot axis (12) and the centre axis of the locking axis (24) are located in the same plane S₁The clamping surface (315) and the plane S₁The included angle alpha is 90-110 degrees.

3. A machine arm according to claim 2, characterized in that a second pivot shaft (21) is connected to the fixing mechanism (2), and the main arm (1) is pivoted with the fixing mechanism (2) through the second pivot shaft (21);

the central axis of the locking shaft (24) and the central axis of the second pivot shaft (21) are positioned on the same plane S₂Said plane S₁And the plane S₂And is vertical.

4. A horn according to any of claims 1-3, wherein said lock catch (31) defines a mating groove (318), said lock holding shaft (24) is engaged in said mating groove (318), and said engaging surface (315) is a groove wall of said mating groove (318) away from said first pivot axis (12).

5. A horn according to claim 4, wherein the bottom of said mating groove (318) has a recess (314) formed in its end adjacent to said engagement surface (315), said recess (314) being capable of receiving said locking shaft (24).

6. A horn according to claim 3, characterized in that said fixing means (2) comprise:

a connection substrate (22) for connecting with the body (10); and

two fixing lugs (23) which are connected to one side of the connecting base plate (22) at intervals and extend towards the side of the main arm (1);

the main arm (1) comprises:

a main arm body (14); and

the two movable lugs (13) are connected to one end of the main arm body (14) at intervals, the two fixed lugs (23) are arranged between the two movable lugs (13), and the two fixed lugs (23) and the two movable lugs (13) are pivoted through the second pivoting shaft (21).

7. The horn according to claim 6, wherein one of the outer side of at least one of said fixed lugs (23) and the inner side of at least one of said movable lugs (13) is provided with a positioning projection (11), and the other is provided with a first positioning groove (232), and when said main arm (1) is in the folded position, said positioning projection (11) is inserted into said first positioning groove (232).

8. The horn according to claim 7, wherein the other of the outside of the fixed lug (23) and the inside of the movable lug (13) is further provided with a second positioning groove (233), and the positioning boss (11) is inserted into the second positioning groove (233) when the main arm (1) is in the unfolded position.

9. The horn of claim 6, further comprising:

the second elastic piece (4) is sleeved outside the second pivot shaft (21), and two ends of the second elastic piece (4) are respectively abutted against the inner sides of the two fixing lugs (23).

10. A drone, characterized by comprising a horn (20) according to any one of claims 1 to 9.