Foldable fixing piece device for motor base arm of multi-rotor unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicle accessories, in particular to a multi-rotor unmanned aerial vehicle motor base arm foldable fixing piece device which comprises a fuselage fixing piece and an arm pipe connecting piece, the top of the fuselage fixing piece is provided with an installation hole used for fixed installation, and the bottom of the left end of the fuselage fixing piece is provided with an inwards-concave installation groove. Pin column holes are formed in the front side and the rear side of the mounting groove, a right locking table of a semi-frustum-shaped structure is arranged on the upper portion of the left end of the machine body fixing piece, and a positioning boss protruding outwards is arranged in the center of the left end of the right locking table. The utility model provides a novel foldable fixing piece device for a motor base arm of a multi-rotor unmanned aerial vehicle. The defects that in the prior art, the strength and rigidity of the connecting position of the foldable motor base arm of the rotor unmanned aerial vehicle are insufficient are effectively overcome.

Description

Technical Field

[0001] This utility model relates to the field of drone accessories technology, specifically a foldable fixing device for a multi-rotor drone motor mount arm. Background Technology

[0002] With the rapid development of drone technology, multi-rotor drones have become an important branch of the drone field due to their unique flight performance and wide range of applications. To meet different mission requirements, the size and weight of multi-rotor drones are constantly increasing, evolving from small drones weighing only a few kilograms to large drones weighing tens or even hundreds of kilograms. This development trend places higher demands on the structural design of drones, especially in the design of the motor mounts.

[0003] As a key component connecting the drone fuselage and rotor motors, the stability and strength of the motor mount directly affect the drone's flight safety and performance. For small multi-rotor drones, due to their lighter overall weight, the design of the motor mount is relatively simple, typically employing a foldable structure to reduce storage space and improve portability. While these small drones exhibit some instability at the rotary joint when the motor mount is fully extended, this is within acceptable limits due to their light weight and meets basic usage requirements. However, the situation is entirely different for large multi-rotor drones. Due to their greater weight and higher payload, the strength and stability requirements for the motor mount are correspondingly higher. The instability at the rotary joint becomes particularly pronounced in traditional foldable motor mounts when fully extended. This instability not only affects the drone's flight stability but can also lead to serious accidents such as motor mount breakage during flight, posing a severe threat to the drone's safe flight.

[0004] Therefore, there is an urgent need for a new type of foldable fixing device for the motor mount of multi-rotor UAVs to solve these defects in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a foldable fixing device for the motor mount arm of a multi-rotor drone to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A foldable fixing device for a multi-rotor UAV motor mount arm includes a fuselage fixing component and an arm tube connector. The fuselage fixing component has a mounting hole at its top for fixed installation, a recessed mounting groove at the bottom of its left end, and pin holes on both the front and rear sides of the mounting groove. A semi-circular right locking platform with a center position at the left end of the right locking platform has an outwardly protruding positioning boss with a threaded hole. The arm tube connector is a cylindrical structure with a connector head at its right end. The bottom of the connector head has an outwardly protruding pin seat for mounting. The pin holder is installed in the mounting slot. The pin hole is provided in the pin holder. The pin holes on the front and back sides of the mounting slot are aligned with the pin holes in the pin holder and the pin is inserted. The upper part of the connector is provided with a semi-circular truncated structure left locking plate. The left locking plate is provided with a positioning groove that fits the shape of the positioning boss. After the left locking plate and the right locking plate are connected, a disc-shaped clamping cover is fitted on top. The inside of the clamping cover is a truncated truncated inner groove that fits the shape of the outer circumference of the left and right locking plates. A locking screw is inserted at the center of the clamping cover. The locking screw is threaded to the threaded hole on the positioning boss. The head of the locking screw is provided with a hand-tightening handle, which is located above the clamping cover.

[0008] Furthermore, the arm tube connector has a through locking arm hole in the middle, and the end of the drone motor mount arm also has a locking arm hole. After the end of the drone motor mount arm is inserted into the arm tube connector, the locking arm holes of the two are aligned and bolts are inserted to fix them.

[0009] Furthermore, a strip groove is provided on the arm tube connector, and an alignment indicator line is provided on the outer surface of the end of the drone motor mount arm. When the alignment indicator line is observed through the strip groove, the locking holes of the drone motor mount arm and the arm tube connector are aligned.

[0010] Furthermore, the fuselage fixing component and the arm tube connector are made of aluminum alloy, titanium alloy, or engineering plastic.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model achieves a rotatable connection between the motor mount arm and the fuselage through a pin inserted into a pin hole. Left and right locking platforms ensure the motor mount arm is positioned when horizontally extended. Furthermore, the conical fit between the pressure cover and the left and right locking platforms ensures a secure, zero-play locking mechanism, enhancing the connection strength of the motor mount arm and ensuring it can withstand greater loads and more complex flight environments. This utility model employs a detachable connection method, allowing for convenient and quick maintenance or replacement of the motor mount arm.

[0013] 2. In order to meet the requirements of strength and lightweight, the fuselage fixing parts and arm tube connecting parts of this utility model are made of lightweight and high-strength materials such as aluminum alloy, titanium alloy or engineering plastics. They not only have excellent mechanical properties, but also good corrosion resistance and wear resistance, which can ensure the long-term stable operation of the UAV motor mount arm in complex environments. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram from above, showing a foldable fixing device for a multi-rotor UAV motor mount arm.

[0015] Figure 2 This is an exploded view of the structure of a foldable fixing device for a multi-rotor drone motor mount arm from below.

[0016] Figure 3 This is a structural schematic diagram of a foldable fixing device for a multi-rotor drone motor mount arm from an overhead view.

[0017] Figure 4 This is a front view of a foldable fixing device for a multi-rotor drone motor mount arm.

[0018] In the diagram: 1. Body fixing component; 2. Pin hole; 3. Pin; 4. Mounting hole; 5. Right locking platform; 6. Positioning boss; 7. Threaded hole; 8. Arm tube connector; 9. Connector; 10. Pin seat; 11. Left locking platform; 12. Positioning groove; 13. Locking screw; 14. Hand-tightening handle; 15. Pressure cover; 16. Locking arm hole; 17. Mounting slot. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please refer to Figures 1-4A foldable fixing device for a multi-rotor UAV motor mount arm includes a fuselage fixing component 1 and an arm tube connector 8. The fuselage fixing component 1 has a mounting hole 4 at its top for fixed installation. A recessed mounting groove 17 is located at the bottom of the left end of the fuselage fixing component 1. Pin holes 2 are located on both the front and rear sides of the mounting groove 17. A semi-circular right locking platform 5 is located at the upper part of the left end of the fuselage fixing component 1. A protruding positioning boss 6 is located at the center of the left end of the right locking platform 5, and threaded holes 7 are located on the positioning boss 6. The arm tube connector 8 is a cylindrical structure. A connector head 9 is located at the right end of the arm tube connector 8. A protruding pin seat 10 is located at the bottom of the connector head 9. The pin seat 10 is installed in the mounting groove 17. The connector 9 has a pin hole 2 inside. The pin holes 2 on the front and rear sides of the mounting groove 17 are aligned with the pin holes 2 inside the pin seat 10 and a pin 3 is inserted. The upper part of the connector 9 has a semi-circular left locking platform 11. The left locking platform 11 has a positioning groove 12 that fits the shape of the positioning boss 6. After the left locking platform 11 and the right locking platform 5 are connected, a disc-shaped pressure cover 15 is fitted on top. The inside of the pressure cover 15 is a frustum-shaped inner groove that fits the shape of the outer circumference of the left locking platform 11 and the right locking platform 5. A locking screw 13 is inserted at the center of the pressure cover 15. The locking screw 13 is threaded to the threaded hole 7 on the positioning boss 6. The head of the locking screw 13 has a hand-tightening handle 14, which is located above the pressure cover 15.

[0021] The arm tube connector 8 has a through locking arm hole 16 in the middle, and the end of the drone motor mount arm also has a locking arm hole 16. After the end of the drone motor mount arm is inserted into the arm tube connector 8, the locking arm holes 16 of the two are aligned and bolts are inserted to fix them.

[0022] The arm tube connector 8 has a strip groove, and the outer surface of the end of the drone motor mount arm has an alignment indicator line. When the alignment indicator line is observed through the strip groove, the locking holes 16 of the drone motor mount arm and the arm tube connector 8 are aligned.

[0023] The fuselage fixing component 1 and the arm tube connector 8 are made of aluminum alloy, titanium alloy or engineering plastic.

[0024] Working principle of this embodiment:

[0025] During installation in this embodiment, the fuselage fixing component 1 is first fixed to the fuselage of the drone through the mounting hole 4. Then, the pin seat 10 of the connector 9 of the arm tube connector 8 is aligned and inserted into the mounting groove 17 of the fuselage fixing component 1. At this time, the pin hole 2 in the pin seat 10 is aligned with the pin holes 2 on the front and rear sides of the mounting groove 17, and then the pin 3 is inserted through these aligned pin holes 2.

[0026] During drone flight, the motor mount arm must remain horizontal. First, align the left locking plate 11 of the arm tube connector 8 with the right locking plate 5 of the fuselage fixing component 1, ensuring that the positioning groove 12 on the left locking plate 11 fits snugly against the positioning boss 6. Then, place the clamping cap 15 over the aligned left locking plate 11 and right locking plate 5. The frustum-shaped inner groove of the clamping cap 15 fits snugly against the outer circumference of the left locking plate 11 and right locking plate 5, ensuring a secure clamping effect. Finally, thread the locking screw 13 through the center of the clamping cap 15 into the threaded hole 7 on the positioning boss 6. Rotate the hand-tightening handle 14 of the locking screw 13 until the clamping cap 15 tightly locks the left locking plate 11 and right locking plate 5 together, achieving a stable connection of the motor mount arm.

[0027] In this embodiment, the motor mount arm is rotatably connected to the fuselage via a pin 3 passing through a pin hole 2. Left and right locking platforms ensure the motor mount arm is positioned when horizontally extended. Furthermore, the tapered fit between the pressure cover 14 and the left and right locking platforms provides a secure, non-playing locking mechanism, enhancing the connection strength of the motor mount arm and ensuring it can withstand greater loads and more complex flight environments. This embodiment employs a detachable connection method, allowing for convenient and quick maintenance or replacement of the motor mount arm.

[0028] The end of the drone motor mount arm is designed with a locking arm hole 16, and the middle of the arm tube connector 8 also has a through locking arm hole 16. When the end of the drone motor mount arm is inserted into the arm tube connector 8, the locking arm holes 16 of both are aligned, and bolts are inserted to firmly fix the drone motor mount arm onto the arm tube connector 8. The arm tube connector 8 has a slot, and the outer surface of the end of the drone motor mount arm has an alignment indicator line. This line indicates the position of the locking arm hole 16. During the process of inserting the drone motor mount arm into the arm tube connector 8, the operator can observe the alignment indicator line through the slot. When the alignment indicator line appears in the slot, it means that the locking arm hole 16 of the drone motor mount arm is aligned with the locking arm hole 16 of the arm tube connector 8. At this time, bolts can be quickly inserted for fixation, improving installation efficiency and accuracy.

[0029] To meet the requirements of strength and lightweight design, the fuselage fixing component 1 and the arm tube connector 8 are made of lightweight, high-strength materials such as aluminum alloy, titanium alloy, or engineering plastics. These materials not only have excellent mechanical properties but also good corrosion resistance and wear resistance, ensuring the long-term stable operation of the UAV motor mount arm in complex environments.

Claims

1. A foldable fixing device for a multi-rotor UAV motor mount arm, comprising a fuselage fixing component (1) and an arm tube connector (8), characterized in that: The top of the fuselage fixing component (1) is provided with a mounting hole (4) for fixed installation. The bottom of the left end of the fuselage fixing component (1) is provided with a recessed mounting groove (17). The front and rear sides of the mounting groove (17) are provided with pin holes (2). The upper part of the left end of the fuselage fixing component (1) is provided with a right locking platform (5) of a semi-circular structure. The center of the left end of the right locking platform (5) is provided with an outwardly protruding positioning boss (6). The positioning boss (6) is provided with a threaded hole (7). The arm tube connector (8) is a cylindrical structure. The right end of the arm tube connector (8) is provided with a connector (9). The bottom of the connector (9) is provided with an outwardly protruding pin seat (10). The pin seat (10) is installed in the mounting groove (17). The pin seat (10) is provided with a pin hole (2). The front and rear sides of the mounting groove (17) are provided with a pin hole (2). After the pin hole (2) is aligned with the pin hole (2) in the pin seat (10), the pin (3) is inserted. The upper part of the connector (9) is provided with a semi-circular structure left locking platform (11). The left locking platform (11) is provided with a positioning groove (12) that fits the shape of the positioning boss (6). After the left locking platform (11) and the right locking platform (5) are connected, a disc-shaped pressure cover (15) is fitted on top. The inside of the pressure cover (15) is a frustum-shaped inner groove that fits the shape of the outer circumference of the left locking platform (11) and the right locking platform (5). A locking screw (13) is inserted at the center of the pressure cover (15). The locking screw (13) is threadedly connected to the threaded hole (7) on the positioning boss (6). The head of the locking screw (13) is provided with a hand-tightening handle (14), which is located above the pressure cover (15).

2. The foldable fixing device for a multi-rotor UAV motor mount arm according to claim 1, characterized in that: The arm tube connector (8) has a through locking arm hole (16) in the middle, and the end of the UAV motor mount arm also has a locking arm hole (16). After the end of the UAV motor mount arm is inserted into the arm tube connector (8), the locking arm holes (16) of the two are aligned and bolts are inserted to fix them.

3. The foldable fixing device for a multi-rotor UAV motor mount arm according to claim 2, characterized in that: The arm tube connector (8) has a strip groove, and the outer surface of the end of the UAV motor mount arm has an alignment indicator line. When the alignment indicator line is observed through the strip groove, the locking holes (16) of the UAV motor mount arm and the arm tube connector (8) are aligned.

4. The foldable fixing device for a multi-rotor UAV motor mount arm according to claim 1, characterized in that: The fuselage fixing component (1) and the arm tube connector (8) are made of aluminum alloy, titanium alloy or engineering plastic.

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