Foldable unmanned aerial vehicle frame

Abstract

This utility model belongs to the field of unmanned aerial vehicle (UAV) technology, specifically relating to a foldable UAV frame, including a main frame, a supporting base, a hinge assembly, and propeller mounting arms. Multiple propeller mounting arms are connected around the main frame via hinges. A rotating sleeve of the hinge assembly is rotatably connected to the outer end of a mounting base and connected to the propeller mounting arms. A locking arm is rotatably connected to the mounting base, and the rotating sleeve is rotatably connected to a limiting link. The locking arm is rotatably connected to the limiting link. A locking hook on the locking arm can hook onto the first locking part when the rotating sleeve rotates to a horizontal position and onto the second locking part when it rotates to a vertical position. This design achieves the rotational storage of the propeller mounting arms through the hinge assembly. After limiting the position using the elasticity of the limiting link, the locking hook further locks the rotating parts, improving the stability of the equipment using the hinge assembly and meeting the UAV's need for locking the hinge assembly.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) technology, specifically relating to a foldable UAV frame. Background Technology

[0002] The propeller mounting arms of existing drones are generally connected to the main frame by hinges in a rotating manner to facilitate folding and storage. However, in the unfolded or folded state, the mounting arms are generally only limited by the hinge's limiting linkage, without locking. During takeoff, landing, or transportation, if the impact force at the connection between the propeller mounting arm and the main frame exceeds the threshold, the propeller mounting arm will disengage from the limiting state, causing it to swing freely. This affects the stability of the drone and increases the probability of the propeller colliding with the ground. Utility Model Content

[0003] To address the aforementioned problems in existing technologies, this solution provides a foldable drone frame.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A foldable drone frame includes a main frame, a support base, hinge components, and propeller mounting arms. The main frame has a ring-shaped or disc-shaped structure. Multiple hinge components are installed around the main frame in a star-shaped arrangement. The propeller mounting arms are used to mount propellers, and each propeller mounting arm is connected to a corresponding hinge component. The propeller mounting arms can rotate downward relative to the main frame to fold the propeller mounting arms. The support base is fixedly installed at the bottom of the main frame.

[0006] The hinge assembly includes a mounting base and a rotating sleeve; the mounting base is fixedly connected to the main frame; the rotating sleeve is rotatably connected to the outer end of the mounting base and is connected to the propeller mounting arm by a plug-in connection; a locking arm is rotatably connected to the mounting base, and a limit link is rotatably connected to the rotating sleeve, and the locking arm and the limit link are rotatably connected to each other.

[0007] A rotatable locking hook is provided on the locking arm, and a first locking part and a second locking part are provided on the rotating sleeve; when the rotating sleeve rotates to the horizontal position, the locking hook hooks the first locking part; when the rotating sleeve rotates to the vertical position, the locking hook hooks the second locking part; when the locking hook is pressed, the locking hook can disengage from the first locking part or the second locking part.

[0008] As an alternative or supplement to the above structure: the outer end of the locking arm is provided with a mounting hole; the locking hook is disposed in the mounting hole.

[0009] As an alternative or supplement to the above structure: the middle part of the lock hook is rotatably connected to the lock arm, and the shank end of the lock hook covers the opening of the mounting hole and protrudes from the mounting hole.

[0010] As an alternative or supplement to the above structure: the shank end of the lock hook is provided with anti-slip texture; the shank end of the lock hook extends to the outer end of the lock arm.

[0011] As an alternative or supplement to the above structure: the locking hook is U-shaped, with hook heads at both ends of the lock; when the rotating sleeve rotates to the horizontal position, the part where the locking arm connects to the limiting link is placed inside the U-shaped opening of the locking hook.

[0012] As an alternative or supplement to the above structure: a torsion spring is provided on the connecting shaft between the lock hook and the lock arm.

[0013] As an alternative or supplement to the above structure: the hook end of the lock has a first inclined surface, and the first and second locking parts have second inclined surfaces; the first and second inclined surfaces engage with each other to make the lock hook rotate and compress the torsion spring.

[0014] As an alternative or supplement to the above structure: the rotating sleeve is in the shape of a sleeve; the first locking part is located at the outer end of the rotating sleeve, and the second locking part is located at the inner end of the rotating sleeve; the first locking part is an inverted U-shaped ear or the edge of the tube at the outer end of the rotating sleeve, and the second locking part is an inverted U-shaped ear or the edge of the tube at the inner end of the rotating sleeve.

[0015] As an alternative or supplement to the above structure: the rotating sleeve is rotatably connected to the receiving groove at the outer end of the mounting base and can rotate downward; a first side ear is provided above the outer end of the mounting base, and the first side ear is rotatably connected to the rear end of the locking arm; a second side ear is provided on the outer side wall of the rotating sleeve, and the second side ear is rotatably connected to the limiting link of the locking arm.

[0016] As an alternative or supplement to the above structure: the locking arm has a groove-shaped structure; when the rotating sleeve rotates to the vertical position, the limiting link rotates to the bottom of the locking arm; when the rotating sleeve rotates to the horizontal position, the limiting link rotates into the groove cavity of the locking arm.

[0017] The beneficial effects of this utility model are as follows: The drone frame structure in this solution can realize the rotation and storage of the propeller mounting arm through the hinge assembly. Furthermore, since the locking arm is equipped with a locking hook, after the limit link itself is limited by its own elasticity, the locking hook is used to hook the rotating part to achieve position locking, thereby improving the stability of the equipment used by the hinge assembly during use and meeting the drone's need for locking the hinge assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a 3D structural diagram of the foldable drone frame in this solution;

[0020] Figure 2 This is a top view of the foldable drone frame in this design.

[0021] Figure 3 This is a three-dimensional structural diagram of the hinge assembly;

[0022] Figure 4 This is an exploded view of the hinge assembly;

[0023] Figure 5 This is a structural diagram of the rotating sleeve in the horizontal position;

[0024] Figure 6 This is a cross-sectional view of the rotating sleeve in the horizontal position.

[0025] In the figure: 1-Installation base; 11-First side ear; 12-Receiving groove; 2-Rotating sleeve; 21-First locking part; 22-Second locking part; 23-Second side ear; 3-Modible connecting rod; 4-Locking hook; 5-Locking arm; 6-Supporting base frame; 7-Main frame; 8-Propeller; 9-Propeller mounting arm. Detailed Implementation

[0026] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0027] like Figures 1 to 6 As shown, this embodiment designs a foldable drone frame, including a main frame 7, a support base 6, a hinge assembly, and a propeller mounting arm 9, among other components.

[0028] The main frame 7 has a ring-shaped or disc-shaped structure. Figure 1 The main frame 7 in the middle is an octagonal ring structure.

[0029] Multiple hinges are installed around the main frame 7, with the hinges located at the corners of the main frame 7 and arranged in a star shape. Propeller mounting arms 9 are used to mount propellers 8, and each of the multiple propeller mounting arms 9 is connected to a corresponding hinge. The propeller mounting arms 9 can rotate downwards relative to the main frame 7 to fold. A support base 6 is fixedly installed at the bottom of the main frame 7.

[0030] The hinge assembly includes components such as a mounting base 1 and a rotating sleeve 2. The mounting base 1 can be block-shaped, sheet-shaped, or elongated, and is fixedly connected to the main frame 7. The rotating sleeve 2 is rotatably connected to the front end of the mounting base 1 and can rotate relative to the mounting base 1 within a range of 0 to 90° ± 5°. The rotating sleeve 2 is fixedly connected to the propeller mounting arm 9.

[0031] A locking arm 5 is rotatably connected to the mounting base 1, and a limiting link 3 is rotatably connected to the rotating sleeve 2. The locking arm 5 and the limiting link 3 are rotatably connected to each other. When the rotating sleeve 2 rotates relative to the mounting base 1, the locking arm 5 and the limiting link 3 can move in tandem. The locking arm 5 can rotate relative to the mounting base 1 within a range of 0 to 90° ± 5°. The limiting link 3 can rotate relative to the mounting base 1 within a range of 0 to 90° ± 5°.

[0032] A rotatable locking hook 4 is provided on the locking arm 5, and a first locking part 21 and a second locking part 22 are provided on the rotating sleeve 2.

[0033] When the rotating sleeve 2 rotates to the horizontal position, both the locking arm 5 and the limiting link 3 are in a horizontal state, that is... Figure 3 When the position is shown, the connection point between the limiting link 3 and the rotating sleeve 2 is located above the line connecting the connection point between the locking arm 5 and the mounting base 2, and the connection point between the locking arm 5 and the limiting link 3. This utilizes the elasticity of the limiting link 3 itself to prevent it from rotating downwards, achieving the limiting state when the rotating sleeve 2 rotates to a horizontal position. At this point, the locking hook 4 hooks onto the first locking part 21, thereby locking the relative positions of the mounting base 1 and the rotating sleeve 2, thus locking the rotating sleeve 2 and the mounting base 1 into a relatively parallel state. When the locking hook 4 is pressed, it can disengage from the first locking part 21.

[0034] When the rotating sleeve 2 rotates to the vertical position, both the locking arm 5 and the limiting link 3 are in a vertical state (not shown in the figure). The connection point between the locking arm 5 and the limiting link 3 is located to the left of the line connecting the connection point between the limiting link 3 and the rotating sleeve 2 and the connection point between the locking arm 5 and the mounting base 2 (i.e., the connection point between the locking arm 5 and the limiting link 3 is located on the side closer to the mounting base 1). This utilizes the elasticity of the limiting link 3 itself to prevent it from rotating to the right (i.e., to prevent the limiting link 3 from rotating away from the mounting base 1), achieving the limiting state when the rotating sleeve 2 rotates to the horizontal position. At this time, the locking hook 4 hooks onto the second locking part 22, and the rotating sleeve 2 and the mounting base 1 can be locked in a relatively perpendicular position. When the locking hook 4 is pressed, it can disengage from the second locking part 22.

[0035] The locking hook 4 is rotatably connected to the front end of the locking arm 5, meaning the locking hook 4 is located at the operating end of the locking arm 5, facilitating simultaneous operation of the locking arm 5 and the locking hook 4, and promoting one-handed operation of both. The outer end of the locking arm 5 has a mounting hole; the locking hook 4 is positioned within the mounting hole. The middle part of the locking hook is rotatably connected to the locking arm, and the shank end of the locking hook covers the opening of the mounting hole and slightly protrudes from it, thereby improving the anti-accidental contact capability of the locking hook 4. The shank end of the locking hook has anti-slip textures; the shank end of the locking hook extends towards the outer end of the locking arm. The locking hook 4 is U-shaped, with hooks at both ends of the latch, allowing the connection between the limiting support and the locking arm 5 to extend into the U-shaped opening of the locking hook 4, achieving spatial clearance between the locking hook 4 and the limiting link 3, thus preventing collisions and interference when they rotate relative to each other.

[0036] A torsion spring is provided on the connecting shaft between the locking hook 4 and the locking arm 5. The hook end of the locking hook has a first inclined surface, and the first and second locking parts have second inclined surfaces. The first and second inclined surfaces engage with each other, causing the locking hook to rotate and compress the torsion spring. The torque of the torsion spring facilitates the automatic reset of the locking hook 4, which is beneficial for the locking hook 4 to automatically lock with the first locking part 21 or the second locking part 22 without external force. After the external force overcomes the elasticity of the torsion spring, the locking hook 4 rotates and disengages from the first locking part 21 or the second locking part 22.

[0037] The rotating sleeve 2 is in the shape of a sleeve; an expansion joint is provided at the front end of the rotating sleeve 2, and screw holes are provided on both sides of the expansion joint so as to tighten the expansion joint by screws, thereby clamping the propeller mounting arm 9 inserted into the rotating sleeve 2.

[0038] The first locking part 21 is located at the front end of the rotating sleeve 2, and the second locking part 22 is located at the rear end of the rotating sleeve 2. The first locking part 21 is an inverted U-shaped loop or the outer edge of the rotating sleeve 2, and the second locking part 22 is an inverted U-shaped loop or the inner edge of the rotating sleeve 2. The first locking part 21 and the second locking part 22 can engage with the outer side of the hook head of the locking hook 4 at an angle, so that when the locking arm 5 is pushed, the locking hook 4 can rotate under the action of the angle, thereby automatically hooking the first locking part 21 or the second locking part 22.

[0039] The rotating sleeve 2 is rotatably connected to the receiving groove 12 at the outer end of the mounting base 1 and can rotate downward; a first side ear 11 is provided above the outer end of the mounting base 1, and the first side ear 11 is rotatably connected to the rear end of the locking arm 5; a second side ear 23 is provided on the outer side wall of the rotating sleeve 2, and the second side ear 23 is rotatably connected to the limiting link 3 of the locking arm 5.

[0040] The locking arm 5 has a groove-shaped structure; when the rotating sleeve 2 rotates to the vertical position, the limiting link 3 rotates to below the locking arm 5; when the rotating sleeve 2 rotates to the horizontal position (i.e., Figure 3When the position shown is reached, the limiting link 3 rotates into the groove of the locking arm 5.

[0041] When the rotating sleeve 2 is rotated to the vertical position, the rotating sleeve 2 and the mounting base 1 are perpendicular to each other; when the rotating sleeve 2 is rotated to the horizontal position, the rotating sleeve 2 and the mounting base 1 are parallel to each other.

[0042] The above embodiments are merely illustrative examples and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A foldable drone frame, characterized by: It includes a main frame (7), a support base (6), a hinge assembly, and a propeller mounting arm (9); the main frame (7) is a ring-shaped or disc-shaped structure; multiple hinges are installed around the main frame (7) in a star-shaped distribution; the propeller mounting arm (9) is used to mount the propeller (8), and the multiple propeller mounting arms (9) are connected to the hinges one by one; the propeller mounting arm (9) can rotate downward relative to the main frame (7) to fold the propeller mounting arm (9); the support base (6) is fixedly installed at the bottom of the main frame (7); The hinge assembly includes a mounting base (1) and a rotating sleeve (2); the mounting base (1) is fixedly connected to the main frame (7); the rotating sleeve (2) is rotatably connected to the outer end of the mounting base (1) and is connected to the propeller mounting arm (9) by a plug-in connection; a locking arm (5) is rotatably connected to the mounting base (1), and a limit link is rotatably connected to the rotating sleeve (2); the locking arm (5) and the limit link are rotatably connected to each other. A rotatable locking hook (4) is provided on the locking arm (5), and a first locking part (21) and a second locking part (22) are provided on the rotating sleeve (2); when the rotating sleeve (2) rotates to the horizontal position, the locking hook (4) hooks the first locking part (21); when the rotating sleeve (2) rotates to the vertical position, the locking hook (4) hooks the second locking part (22); when the locking hook (4) is pressed, the locking hook (4) can disengage from the first locking part (21) or the second locking part (22).

2. The foldable drone frame according to claim 1, characterized in that: The outer end of the locking arm (5) is provided with a mounting hole; the locking hook (4) is provided in the mounting hole.

3. The foldable drone frame according to claim 2, characterized in that: The middle part of the lock hook (4) is rotatably connected to the lock arm (5), and the handle end of the lock hook (4) covers the opening of the mounting hole and protrudes from the mounting hole.

4. The foldable drone frame according to claim 3, characterized in that: The handle end of the lock hook (4) is provided with anti-slip texture; the handle end of the lock hook (4) extends to the outer end of the lock arm (5).

5. The foldable drone frame according to claim 2, characterized in that: The lock hook (4) is U-shaped and has hooks at both ends of the lock. When the rotating sleeve (2) rotates to the horizontal position, the part of the lock arm (5) connected to the limiting link is placed inside the U-shaped opening of the lock hook (4).

6. The foldable drone frame according to claim 1, characterized in that: A torsion spring is provided on the connecting shaft between the lock hook (4) and the lock arm (5).

7. The foldable drone frame according to claim 6, characterized in that: The hook end of the lock hook (4) has a first inclined surface, and the first locking part (21) and the second locking part (22) have a second inclined surface; the first inclined surface and the second inclined surface cooperate to make the lock hook (4) rotate and compress the torsion spring.

8. The foldable drone frame according to any one of claims 1-7, characterized in that: The rotating sleeve (2) is in the shape of a sleeve; the first locking part (21) is located at the outer end of the rotating sleeve (2), and the second locking part (22) is located at the inner end of the rotating sleeve (2); the first locking part (21) is an inverted U-shaped ear or the tube edge at the outer end of the rotating sleeve (2), and the second locking part (22) is an inverted U-shaped ear or the tube edge at the inner end of the rotating sleeve (2).

9. The foldable drone frame according to claim 8, characterized in that: The rotating sleeve (2) is rotatably connected to the receiving groove (12) at the outer end of the mounting base (1) and can rotate downward; a first side ear (11) is provided above the outer end of the mounting base (1), and the first side ear (11) is rotatably connected to the rear end of the locking arm (5); a second side ear (23) is provided on the outer side wall of the rotating sleeve (2), and the second side ear (23) is rotatably connected to the limiting link of the locking arm (5).

10. The foldable drone frame according to any one of claims 1-7, characterized in that: The locking arm (5) has a groove-shaped structure; when the rotating sleeve (2) rotates to the vertical position, the limiting link rotates to the bottom of the locking arm (5); when the rotating sleeve (2) rotates to the horizontal position, the limiting link rotates into the groove cavity of the locking arm (5).

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