Rotary self-locking connection device and drone

Abstract

The present invention provides a rotating self-locking connection device and an unmanned aerial vehicle, which belongs to the field of rotating self-locking connection technology. The rotating self-locking connection device includes a fuselage, an arm and a connecting mechanism. The arm is rotatably mounted on the side wall of the fuselage. A connecting mechanism is installed between the fuselage and the arm. The connecting mechanism includes a first connecting seat, a second connecting seat, a connecting block, a connecting column and a second clamping block. The first connecting seat is mounted on the side wall of the fuselage, and the second connecting seat is mounted on one end of the arm. The present invention sets a connecting mechanism, the first clamping block is inserted into the inner cavity of the connecting column, the contact block is squeezed, the air in the second cylinder is injected into the first cylinder, and the first piston is pushed to move until the first clamping block is fully inserted. The first piston pushes the first insertion rod into the first locking hole. Under the action of the first spring, the first push rod is driven to drive the second clamping block to move toward the first clamping block, and the first clamping block is locked, completing the connection and fixation between the fuselage and the arm, which is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of rotational self-locking connections, and in particular to a rotational self-locking connection device and a drone. Background Art

[0002] The rotating self-locking connection device is a mechanical connection element that is widely used in scenarios that require quick connection and disassembly, such as the fuselage, arms and other detachable components of drones. In existing drones, the fuselage and arms are usually fixedly connected or hinged through a rotating shaft, which is not easy to disassemble.

[0003] The ability to quickly assemble and disassemble simply by rotating the self-locking connection is particularly important for drones, as they often require rapid component replacement or maintenance during different missions or transportation. This significantly reduces the time a drone spends on the ground, improving operational efficiency. Beyond drones, other mechanical fields also require quick disassembly between relatively independent connected components. Summary of the Invention

[0004] In order to remedy the above deficiencies, the present invention provides a rotating self-locking connection device and a drone that overcome the above technical problems or at least partially solve the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides a rotating self-locking connection device, comprising a body, an arm, and a connection mechanism, wherein the arm is rotatably mounted on a side wall of the body, and a connection mechanism is installed between the body and the arm, wherein the connection mechanism comprises:

[0007] a first connecting seat, the first connecting seat being mounted on a side wall of the fuselage;

[0008] A second connecting base, the second connecting base is mounted on one end of the machine arm, and the second connecting base is connected to the first connecting base by a snap connection;

[0009] A connecting block, the connecting block is fixedly mounted on the side wall of the second connecting seat, and a first clamping block is fixedly mounted on the other end of the connecting block, and the first clamping block is wedge-shaped;

[0010] A connecting post, the connecting post being rotatably mounted in the inner cavity of the first connecting seat, the inner cavity of the connecting post being provided with a cavity for inserting the first clamping block;

[0011] The second clamping block is symmetrically and slidably mounted in the inner cavity of the connecting column. The second clamping block is wedge-shaped and is used to clamp the first clamping block.

[0012] In a preferred solution, a short shaft is symmetrically fixedly installed on the surface of the connecting column, and the short shaft is rotatably connected to the first connecting seat. A first push rod is fixedly installed on the side wall of the second block, and a first spring is fixedly installed in the inner cavity of the connecting column. The other end of the first spring is fixedly connected to the first push rod for driving the second block.

[0013] In a preferred solution, a push plate is fixedly installed between two adjacent second clamping blocks, a first cylinder is symmetrically fixedly installed in the inner cavity of the connecting column, a first piston is slidably installed in the inner cavity of the first cylinder, a tension spring is fixedly installed in the inner cavity of the first cylinder, the other end of the tension spring is fixedly connected to the first piston for driving the first piston, a first insertion rod is fixedly installed on the side wall of the first piston, and a first locking hole is symmetrically opened on the side wall of the connecting block for inserting the first insertion rod.

[0014] By setting a connecting mechanism, the first card block is inserted into the inner cavity of the connecting column, the contact block is squeezed, the second spring is compressed, the second piston moves toward the inner cavity of the second cylinder, and the air in the second cylinder is injected into the first cylinder, pushing the first piston to move until the first card block is fully inserted. The first piston pushes the first insertion rod into the first locking hole to fix the connecting block in the inner cavity of the connecting column. At the same time, the pressure rod disengages from the push plate, and under the action of the first spring, the first push rod is driven to drive the second card block to move toward the first card block, locking the first card block, completing the connection and fixation between the fuselage and the arm, which is convenient for use.

[0015] In a preferred solution, a pressure rod is fixedly mounted on the surface of the first insertion rod for pushing the push plate.

[0016] In a preferred embodiment, a second cylinder is fixedly installed in the inner cavity of the connecting column, a second piston is slidably installed in the inner cavity of the second cylinder, a second spring is fixedly installed in the inner cavity of the second cylinder, the other end of the second spring is fixedly connected to the second piston for driving the second piston, a second push rod is fixedly installed at the other end of the second piston, and a contact block is fixedly installed at the other end of the second push rod.

[0017] In a preferred embodiment, a first one-way valve and a second one-way valve are installed on the side wall of the second cylinder. The first one-way valve is unidirectionally conducted toward the inner cavity of the second cylinder for air intake, and the second one-way valve is unidirectionally conducted toward the outer wall of the second cylinder for air discharge. A hose is connected between the second one-way valve and the first cylinder, and the side wall of the first cylinder is connected to an air relief valve.

[0018] By setting a pressure rod and opening the air release valve, the first cylinder is connected to the outside world. Under the action of the tension spring, the first piston is driven to move toward the inner cavity of the first cylinder, driving the first insertion rod to move synchronously, so that the first insertion rod is disengaged from the first locking hole. At the same time, the pressure rod pushes the push plate to drive the second clamping block to move synchronously, so that the second clamping block is disengaged from the first clamping block, and the lock of the first clamping block can be released, completing the disassembly of the fuselage and the arm, which is convenient for use.

[0019] In a preferred solution, one of the first connecting seat inner cavity is equipped with an adjustment mechanism for adjusting the angle of the machine arm; the adjustment mechanism includes a limit plate, a second locking hole and a second insertion rod, the limit plate is fixedly installed on the upper part of the short shaft, and a plurality of second locking holes are opened on the surface of the limit plate. A pressure block is slidably installed in the inner cavity of the first connecting seat, and a second insertion rod is fixedly installed at the bottom of the pressure block for inserting into the second locking hole.

[0020] In a preferred solution, a third spring is fixedly installed in the inner cavity of the first connecting seat, and the other end of the third spring is fixedly connected to the pressure block for driving the pressure block. A first extrusion block is fixedly installed at the bottom of the pressure block, and a second extrusion block is slidably installed in the inner cavity of the first connecting seat for extruding the first extrusion block. A third push rod is fixedly installed on the side wall of the second extrusion block, and a button is fixedly installed on the other end of the third push rod.

[0021] In a preferred solution, a synchronous wheel is fixedly mounted on the bottom of the short shaft, and a synchronous belt is connected between two adjacent synchronous wheels for driving the plurality of short shafts to rotate synchronously.

[0022] By setting an adjustment mechanism, by pressing a button, the third push rod and the second extrusion block are driven to move in the direction of the pressure block, the first extrusion block is squeezed, the pressure block moves upward, the third spring is compressed, and the second insertion rod is disengaged from the second locking hole, and the connecting column can be rotated to adjust the angle of the machine arm and fold it for easy use. Under the action of the synchronous wheel and the synchronous belt, several connecting columns can be kept rotating synchronously, and then the button is released. Under the action of the third spring, the pressure block is driven to move downward, so that the second insertion rod is inserted into the second locking hole, and the limit plate is locked again.

[0023] A drone, suitable for any one of the above-mentioned rotating self-locking connection devices.

[0024] The present invention provides a rotary self-locking connection device and a drone, the beneficial effects of which include:

[0025] 1. By setting a connecting mechanism, the first card block is inserted into the inner cavity of the connecting column, the contact block is squeezed, the second spring is compressed, the second piston moves toward the inner cavity of the second cylinder, and the air in the second cylinder is injected into the first cylinder, pushing the first piston to move until the first card block is fully inserted. The first piston pushes the first insertion rod into the first locking hole to fix the connecting block in the inner cavity of the connecting column. At the same time, the pressure rod disengages from the push plate, and under the action of the first spring, the first push rod is driven to drive the second card block to move toward the first card block, locking the first card block, completing the connection and fixation between the fuselage and the arm, which is convenient for use.

[0026] 2. By setting a pressure rod and opening the air release valve, the first cylinder is connected to the outside world. Under the action of the tension spring, the first piston is driven to move toward the inner cavity of the first cylinder, driving the first insertion rod to move synchronously, so that the first insertion rod is disengaged from the first locking hole. At the same time, the pressure rod pushes the push plate to drive the second clamping block to move synchronously, so that the second clamping block is disengaged from the first clamping block, and the lock of the first clamping block can be released, completing the disassembly of the fuselage and the arm, which is convenient for use.

[0027] 3. By setting an adjustment mechanism, by pressing the button, the third push rod and the second extrusion block are driven to move in the direction of the pressure block, the first extrusion block is squeezed, the pressure block moves upward, the third spring is compressed, and the second insertion rod is disengaged from the second locking hole. The connecting column can be rotated to adjust the angle of the machine arm and fold it for easy use. Under the action of the synchronous wheel and the synchronous belt, several connecting columns can be kept rotating synchronously. Then, the button is released, and under the action of the third spring, the pressure block is driven to move downward, so that the second insertion rod is inserted into the second locking hole, and the limit plate is locked again. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0029] Figure 1 is a front perspective view provided by an embodiment of the present invention;

[0030] Figure 2 A side perspective view of an embodiment of the present invention is provided;

[0031] Figure 3 A three-dimensional diagram of a connecting mechanism provided in an embodiment of the present invention;

[0032] Figure 4 A three-dimensional diagram of a first connecting socket provided in an embodiment of the present invention;

[0033] Figure 5 A three-dimensional diagram of a second connecting base provided in an embodiment of the present invention;

[0034] Figure 6 A three-dimensional diagram of a connecting column provided in an embodiment of the present invention;

[0035] Figure 7 A side cross-sectional view of a connection mechanism provided in an embodiment of the present invention;

[0036] Figure 8 A top cross-sectional view of a connection mechanism provided in an embodiment of the present invention;

[0037] Figure 9 An exploded view of a connection mechanism provided in an embodiment of the present invention;

[0038] Figure 10 A cross-sectional view of a first connecting socket provided in an embodiment of the present invention;

[0039] In the figure: 1, fuselage; 2, machine arm; 3, connecting mechanism; 301, first connecting seat; 302, second connecting seat; 303, connecting block; 304, first clamping block; 305, first locking hole; 306, connecting column; 307, short shaft; 308, second clamping block; 309, first push rod; 310, first spring; 311, push plate; 312, first cylinder; 313, first piston; 314, tension spring; 315, first insertion rod; 316, pressure rod; 317, second cylinder ; 318, second piston; 319, second spring; 320, second push rod; 321, contact block; 322, first one-way valve; 323, second one-way valve; 324, air release valve; 4, adjusting mechanism; 401, limit plate; 402, second locking hole; 403, pressure block; 404, third spring; 405, second plug rod; 406, first extrusion block; 407, second extrusion block; 408, third push rod; 409, button; 410, synchronous wheel; 411, synchronous belt. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] Reference Figures 1-10As shown, the present invention provides a technical solution: a rotating self-locking connection device and a drone, including a fuselage 1, an arm 2 and a connecting mechanism 3, the arm 2 is rotatably mounted on the side wall of the fuselage 1, a connecting mechanism 3 is installed between the fuselage 1 and the arm 2, the connecting mechanism 3 includes a first connecting seat 301, a second connecting seat 302, a connecting block 303, a connecting column 306 and a second clamping block 308, the first connecting seat 301 is mounted on the side wall of the fuselage 1, the second connecting seat 302 is mounted on one end of the arm 2, the second connecting seat 302 is connected to the first connecting seat 301 by clamping, the connecting block 303 is fixedly mounted on the side wall of the second connecting seat 302, and the connecting block A first clamping block 304 is fixedly installed at the other end of 303. The first clamping block 304 is wedge-shaped. The connecting column 306 is rotatably installed in the inner cavity of the first connecting base 301. A cavity is opened in the inner cavity of the connecting column 306 for inserting the first clamping block 304. A short shaft 307 is symmetrically fixedly installed on the surface of the connecting column 306. The short shaft 307 is rotatably connected to the first connecting base 301. When in use, the first connecting base 301 is installed on the side wall of the fuselage 1, and the second connecting base 302 is installed at one end of the arm 2. The first connecting base 301 or the second connecting base 302 can be fixedly connected to the fuselage 1 or the arm 2 by screws, glue, rivets, etc.

[0042] Reference Figures 1-9 As shown, in a preferred embodiment, the second clamping block 308 is symmetrically slidably installed in the inner cavity of the connecting column 306, and the second clamping block 308 is wedge-shaped and is used to clamp the first clamping block 304. The side wall of the second clamping block 308 is fixedly installed with a first push rod 309 for pushing the second clamping block 308. The inner cavity of the connecting column 306 is fixedly installed with a first spring 310. The other end of the first spring 310 is fixedly connected to the first push rod 309 for driving the second clamping block 308. Under the action of the first spring 310, the first push rod 309 is driven to drive the second clamping block 308 to move toward the first clamping block 304. A push plate 311 is fixedly installed between the two adjacent second clamping blocks 308 for driving the two adjacent second clamping blocks 308 to move synchronously.

[0043] Reference Figures 1-9 As shown, in a preferred embodiment, a first cylinder 312 is symmetrically fixedly installed in the inner cavity of the connecting column 306, a first piston 313 is slidably installed in the inner cavity of the first cylinder 312, a tension spring 314 is fixedly installed in the inner cavity of the first cylinder 312, and the other end of the tension spring 314 is fixedly connected to the first piston 313 for driving the first piston 313. Under the action of the tension spring 314, the first piston 313 is driven to be located in the inner cavity of the first cylinder 312, a first insertion rod 315 is fixedly installed on the side wall of the first piston 313, and a first locking hole 305 is symmetrically opened on the side wall of the connecting block 303 for inserting the first insertion rod 315, and a pressure rod 316 is fixedly installed on the surface of the first insertion rod 315 for pushing the push plate 311.

[0044] Reference Figures 1-9 As shown, in a preferred embodiment, a second cylinder 317 is fixedly installed in the inner cavity of the connecting column 306 for supplying air to the first cylinder 312, a second piston 318 is slidably installed in the inner cavity of the second cylinder 317, a second spring 319 is fixedly installed in the inner cavity of the second cylinder 317, the other end of the second spring 319 is fixedly connected to the second piston 318 for driving the second piston 318, and under the action of the second spring 319, the second piston 318 is driven to move toward the first block 304, a second push rod 320 is fixedly installed at the other end of the second piston 318, and a contact block 321 is fixedly installed at the other end of the second push rod 320, when the first block 304 is inserted into the inner cavity of the connecting column 306, the contact block 321 is squeezed, the second spring 319 is compressed, and the second piston 318 moves toward the inner cavity of the second cylinder 317.

[0045] Reference Figures 1-9 As shown, in a preferred embodiment, a first one-way valve 322 and a second one-way valve 323 are installed on the side wall of the second cylinder 317. The first one-way valve 322 is unidirectionally conducted toward the inner cavity of the second cylinder 317 for air intake, and the second one-way valve 323 is unidirectionally conducted toward the outer wall of the second cylinder 317 for air discharge. A hose is connected to the second one-way valve 323 and the first cylinder 312, and an air relief valve 324 is connected to the side wall of the first cylinder 312.

[0046] In a preferred embodiment, when in use, the first connecting seat 301 is installed on the side wall of the fuselage 1, and the second connecting seat 302 is installed at one end of the arm 2. Then, the first clamping block 304 is inserted into the inner cavity of the connecting column 306, the contact block 321 is squeezed, the second spring 319 is compressed, the second piston 318 moves toward the inner cavity of the second cylinder 317, the second one-way valve 323 is turned on, and the air in the second cylinder 317 is injected into the first cylinder 312, pushing the first piston 313 to move, pulling The spring 314 is stretched until the first clamping block 304 is fully inserted, and the first piston 313 pushes the first insertion rod 315 to insert into the first locking hole 305, fixing the connecting block 303 in the inner cavity of the connecting column 306. At the same time, the pressure rod 316 disengages from the push plate 311, and under the action of the first spring 310, drives the first push rod 309 to drive the second clamping block 308 to move toward the first clamping block 304, locking the first clamping block 304, completing the connection and fixation between the fuselage 1 and the arm 2, which is convenient for use.

[0047] When disassembly is required, by opening the air release valve 324, the first cylinder 312 is connected to the outside world. Under the action of the tension spring 314, the first piston 313 is driven to move toward the inner cavity of the first cylinder 312, driving the first insertion rod 315 to move synchronously, so that the first insertion rod 315 is disengaged from the first locking hole 305. At the same time, the pressure rod 316 pushes the push plate 311 to drive the second clamping block 308 to move synchronously, so that the second clamping block 308 is disengaged from the first clamping block 304, and the lock of the first clamping block 304 can be released, completing the disassembly of the fuselage 1 and the arm 2, which is convenient for use.

[0048] Reference Figures 1-10 As shown, in a preferred embodiment, an adjustment mechanism 4 is installed in the inner cavity of one of the first connecting seats 301, which is used to adjust the angle of the arm 2; the adjustment mechanism 4 includes a limit plate 401, a second locking hole 402 and a second insertion rod 405, the limit plate 401 is fixedly installed on the upper part of the short shaft 307, and a plurality of second locking holes 402 are opened on the surface of the limit plate 401, and a pressure block 403 is slidably installed in the inner cavity of the first connecting seat 301, and a second insertion rod 405 is fixedly installed at the bottom of the pressure block 403 for inserting into the second locking hole 402 to lock the limit plate 401.

[0049] Reference Figures 1-10 As shown, in a preferred embodiment, a third spring 404 is fixedly installed in the inner cavity of the first connecting seat 301, and the other end of the third spring 404 is fixedly connected to the pressure block 403 for driving the pressure block 403. Under the action of the third spring 404, the pressure block 403 is driven to move downward, so that the second insertion rod 405 is inserted into the second locking hole 402 to lock the limit plate 401. A first extrusion block 406 is fixedly installed at the bottom of the pressure block 403, and a second extrusion block 407 is slidably installed in the inner cavity of the first connecting seat 301 for extruding the first extrusion block 406. A third push rod 408 is fixedly installed on the side wall of the second extrusion block 407, and a button 409 is fixedly installed on the other end of the third push rod 408 for driving the second extrusion block 407. A synchronous wheel 410 is fixedly installed at the bottom of the short shaft 307, and a synchronous belt 411 is connected between two adjacent synchronous wheels 410 for driving several short shafts 307 to rotate synchronously.

[0050] In a preferred embodiment, when in use, by pressing the button 409, the third push rod 408 and the second extrusion block 407 are driven to move toward the pressure block 403, the first extrusion block 406 is squeezed, the pressure block 403 moves upward, the third spring 404 is compressed, and the second insertion rod 405 is disengaged from the second locking hole 402, and the connecting column 306 can be rotated to adjust the angle of the machine arm 2 and fold it for easy use. Under the action of the synchronous wheel 410 and the synchronous belt 411, several connecting columns 306 can be kept rotating synchronously, and then the button 409 is released. Under the action of the third spring 404, the pressure block 403 is driven to move downward, so that the second insertion rod 405 is inserted into the second locking hole 402, and the limit plate 401 is re-locked.

[0051] A drone, suitable for a rotary self-locking connection device of any one of the above items.

[0052] Specifically, the working process or working principle of the rotating self-locking connection device and the drone is as follows: when in use, the first connecting seat 301 is installed on the side wall of the fuselage 1, and the second connecting seat 302 is installed at one end of the arm 2, and then the first clamping block 304 is inserted into the inner cavity of the connecting column 306, the contact block 321 is squeezed, the second spring 319 is compressed, the second piston 318 moves to the inner cavity of the second cylinder 317, the second one-way valve 323 is turned on, and the air in the second cylinder 317 is injected into the first cylinder 312, pushing the second spring 319 to move to the second cylinder 317. A piston 313 moves and the tension spring 314 stretches until the first clamping block 304 is fully inserted. The first piston 313 pushes the first insertion rod 315 to insert into the first locking hole 305, fixing the connecting block 303 in the inner cavity of the connecting column 306. At the same time, the pressure rod 316 disengages from the push plate 311, and under the action of the first spring 310, drives the first push rod 309 to drive the second clamping block 308 to move toward the first clamping block 304, locking the first clamping block 304, completing the connection and fixation between the fuselage 1 and the arm 2, which is convenient for use.

[0053] When disassembly is required, by opening the air release valve 324, the first cylinder 312 is connected to the outside world. Under the action of the tension spring 314, the first piston 313 is driven to move toward the inner cavity of the first cylinder 312, driving the first insertion rod 315 to move synchronously, so that the first insertion rod 315 is disengaged from the first locking hole 305. At the same time, the pressure rod 316 pushes the push plate 311 to drive the second clamping block 308 to move synchronously, so that the second clamping block 308 is disengaged from the first clamping block 304, and the lock of the first clamping block 304 can be released, completing the disassembly of the fuselage 1 and the arm 2, which is convenient for use.

[0054] By pressing the button 409, the third push rod 408 and the second extrusion block 407 are driven to move toward the pressure block 403, squeezing the first extrusion block 406 to move the pressure block 403 upward, the third spring 404 is compressed, and the second insertion rod 405 is disengaged from the second locking hole 402, and the connecting column 306 can be rotated to adjust the angle of the machine arm 2 and fold it for easy use. Under the action of the synchronous wheel 410 and the synchronous belt 411, several connecting columns 306 can be kept rotating synchronously, and then the button 409 is released. Under the action of the third spring 404, the pressure block 403 is driven to move downward, so that the second insertion rod 405 is inserted into the second locking hole 402, and the limit plate 401 is locked again.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0056] It should be noted that the fuselage 1 and the arm 2 are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. Their power supply, specific composition and principles are clear to those skilled in the art, so they will not be described in detail.

Claims

1. A rotating self-locking connection device, characterized in that: The invention comprises a body (1), an arm (2) and a connecting mechanism (3), wherein the arm (2) is rotatably mounted on a side wall of the body (1), and a connecting mechanism (3) is mounted between the body (1) and the arm (2), and the connecting mechanism (3) comprises: A first connecting seat (301), the first connecting seat (301) being mounted on a side wall of the fuselage (1); A second connecting seat (302), the second connecting seat (302) is mounted on one end of the machine arm (2), and the second connecting seat (302) is connected to the first connecting seat (301) by snap-fitting; A connecting block (303), the connecting block (303) is fixedly mounted on a side wall of the second connecting seat (302), and a first clamping block (304) is fixedly mounted on the other end of the connecting block (303), and the first clamping block (304) is wedge-shaped; A connecting post (306), the connecting post (306) being rotatably mounted in the inner cavity of the first connecting seat (301), the inner cavity of the connecting post (306) being provided with a cavity for inserting the first clamping block (304); A second clamping block (308), the second clamping block (308) is symmetrically slidably mounted in the inner cavity of the connecting column (306), the second clamping block (308) is wedge-shaped and is used to clamp the first clamping block (304); A short shaft (307) is symmetrically fixedly mounted on the surface of the connecting column (306), and the short shaft (307) is rotatably connected to the first connecting seat (301). A first push rod (309) is fixedly mounted on the side wall of the second clamping block (308). A first spring (310) is fixedly mounted in the inner cavity of the connecting column (306), and the other end of the first spring (310) is fixedly connected to the first push rod (309) for driving the second clamping block (308). A push plate (311) is fixedly installed between two adjacent second clamping blocks (308); a first cylinder (312) is symmetrically fixedly installed in the inner cavity of the connecting column (306); a first piston (313) is slidably installed in the inner cavity of the first cylinder (312); a tension spring (314) is fixedly installed in the inner cavity of the first cylinder (312); the other end of the tension spring (314) is fixedly connected to the first piston (313) for driving the first piston (313); a first insertion rod (315) is fixedly installed on the side wall of the first piston (313); and a first locking hole (305) is symmetrically opened on the side wall of the connecting block (303) for inserting the first insertion rod (315); One of the first connecting seats (301) has an inner cavity equipped with an adjusting mechanism (4) for adjusting the angle of the machine arm (2); the adjusting mechanism (4) comprises a limit plate (401), a second locking hole (402) and a second insertion rod (405); the limit plate (401) is fixedly mounted on the upper part of the short shaft (307); a plurality of second locking holes (402) are opened on the surface of the limit plate (401); a pressure block (403) is slidably mounted in the inner cavity of the first connecting seat (301); a second insertion rod (405) is fixedly mounted on the bottom of the pressure block (403) for inserting into the second locking hole (402); A third spring (404) is fixedly installed in the inner cavity of the first connecting seat (301), and the other end of the third spring (404) is fixedly connected to the pressure block (403) for driving the pressure block (403). A first extrusion block (406) is fixedly installed at the bottom of the pressure block (403). A second extrusion block (407) is slidably installed in the inner cavity of the first connecting seat (301) for extruding the first extrusion block (406). A third push rod (408) is fixedly installed on the side wall of the second extrusion block (407), and a button (409) is fixedly installed at the other end of the third push rod (408).

2. A rotational self-locking connection device according to claim 1, characterized in that: A pressure rod (316) is fixedly mounted on the surface of the first insertion rod (315) and is used to push the push plate (311).

3. A rotational self-locking connection device according to claim 2, characterized in that: A second cylinder (317) is fixedly installed in the inner cavity of the connecting column (306), a second piston (318) is slidably installed in the inner cavity of the second cylinder (317), a second spring (319) is fixedly installed in the inner cavity of the second cylinder (317), the other end of the second spring (319) is fixedly connected to the second piston (318) for driving the second piston (318), a second push rod (320) is fixedly installed at the other end of the second piston (318), and a contact block (321) is fixedly installed at the other end of the second push rod (320).

4. A rotational self-locking connection device according to claim 3, characterized in that: A first one-way valve (322) and a second one-way valve (323) are installed on the side wall of the second cylinder (317). The first one-way valve (322) is unidirectionally connected to the inner cavity of the second cylinder (317) for air intake, and the second one-way valve (323) is unidirectionally connected to the outer wall of the second cylinder (317) for air discharge. A hose is connected between the second one-way valve (323) and the first cylinder (312). The side wall of the first cylinder (312) is connected to a relief valve (324).

5. A rotational self-locking connection device according to claim 4, characterized in that: A synchronous wheel (410) is fixedly mounted on the bottom of the short shaft (307), and a synchronous belt (411) is connected between two adjacent synchronous wheels (410) for driving the plurality of short shafts (307) to rotate synchronously.

6. A drone, suitable for the rotary self-locking connection device according to any one of claims 1 to 5.

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