Unmanned aerial vehicle motor fixing seat

Abstract

The utility model relates to the technical field of unmanned plane parts, concretely provides an unmanned plane motor fixing seat, including hexagonal cavity, arm connecting sleeve, first mounting plate and second mounting plate, arm connecting sleeve one end is connected with hexagonal cavity, is provided with axial positioning key groove formation first elastic end and second elastic end on the sleeve wall of the other end, first mounting plate and second mounting plate are arranged on the upper surface and the lower surface of hexagonal cavity respectively, first mounting plate is used for carrying unmanned plane motor, and a plurality of pairs of axial holding members are respectively arranged on first elastic end and second elastic end, and the axial holding member is used to pull first elastic end and second elastic end to realize locking arm. The utility model discloses unmanned plane fixing seat, high precision, simple structure, strong stability.

Description

Technical Field

[0001] This utility model relates to the field of drone parts technology, specifically providing a drone motor mounting bracket. Background Technology

[0002] As a core load-bearing component connecting the power motor and the drone arm, the installation accuracy of the drone motor mount plays a decisive role in the motor's coaxiality, flight stability, and operational safety. Currently, conventional drone motor mounts mostly adopt a simple structure with flange bolts for direct connection. This structure lacks multi-dimensional pre-positioning design during installation, which easily leads to problems such as motor shaft misalignment, circumferential misalignment, and misalignment between the mount and the arm. These problems can cause eccentric vibration during motor operation, which not only reduces the accuracy of drone hovering and flight path control but also accelerates fatigue wear on motor bearings and the arm, and may even cause flight malfunctions.

[0003] Chinese patent publication number CN216794734U, published on June 21, 2022, entitled "Motor Mount, Motor Assembly for UAV, and UAV," discloses a motor mount and a UAV motor assembly. The core of this solution is the inclusion of anti-wear and anti-loosening components and a limiting structure within the motor mount body to address issues such as stress deformation, wear, thermal deformation loosening, and relative rotation between the internal bearing of the motor and the aluminum alloy bearing housing. This represents a structural optimization of the internal bearing mounting base. However, this solution only improves the stability of the bearing fit within the motor and does not optimize the connection and fixing structure between the motor and the UAV arm. Therefore, it fails to address key pain points such as coaxiality deviation between the motor and the arm during overall installation, installation misalignment, the need for repeated manual calibration, and the tendency for connections to loosen due to flight vibration. Utility Model Content

[0004] To solve the above problems, this utility model provides a UAV motor mounting base, which adopts a three-level positioning structure of arm positioning, motor center positioning shaft positioning, and first mounting plate reference positioning, combined with an arm clamping structure, to achieve high-precision motor installation. The structure is simple and easy to disassemble.

[0005] The present invention provides a drone motor mounting base. The drone motor includes an arm and a central positioning shaft. The motor mounting base includes:

[0006] The machine arm connecting sleeve consists of a hexagonal cavity, a machine arm connecting sleeve, a first mounting plate, and a second mounting plate. One end of the machine arm connecting sleeve is connected to the hexagonal cavity. The first mounting plate and the second mounting plate are respectively disposed on the upper and lower surfaces of the hexagonal cavity to seal the hexagonal cavity.

[0007] The first mounting plate is used to support the drone motor;

[0008] An axial positioning keyway is provided on the cylinder wall at the other end of the boom connecting sleeve. The axial positioning keyway forms a first elastic end and a second elastic end on the cylinder wall of the boom connecting sleeve. The axial positioning keyway extends along the central axis of the boom connecting sleeve, and the length of the axial positioning keyway is less than that of the boom connecting sleeve.

[0009] Multiple pairs of axial clamping members are respectively provided on the first elastic end and the second elastic end, and an axial clamping hole is provided in the center of the axial clamping member.

[0010] The axial clamping hole is used to connect the corresponding axial clamping component, which is used to pull the first elastic end and the second elastic end to lock the machine arm.

[0011] Preferably, the upper and lower surfaces of the hexagonal cavity are respectively provided with an upper mounting platform and a lower mounting platform. The upper mounting platform is provided with an upper fixing threaded hole for mounting the first mounting plate; the lower mounting platform is provided with a lower fixing threaded hole for mounting the second mounting plate.

[0012] Preferably, a positioning protrusion is provided at the center of one side of the upper mounting platform, and a notch is provided on the first mounting plate. The positioning protrusion and the notch cooperate to restrict the direction of the first mounting plate.

[0013] Preferably, the first mounting plate is provided with a cross-shaped adjustment slot, which is used to install drone motors of different sizes.

[0014] Preferably, the first mounting plate is also provided with a central positioning hole, which is transitionally fitted with the central positioning shaft.

[0015] Preferably, the central axis of the central positioning hole coincides with the vertical central axis of the hexagonal cavity, and the perpendicularity tolerance of the two central axes does not exceed 0.02 mm.

[0016] Preferably, the second mounting plate is provided with multiple hollowed-out grooves, which are arranged in parallel at equal intervals.

[0017] Preferably, the hexagonal cavity and the connecting sleeve of the machine arm are integral die-cast structures, and the horizontal central axis of the hexagonal cavity coincides with the central axis of the connecting sleeve of the machine arm.

[0018] Preferably, the first mounting plate and the second mounting plate are parallel, and the plane in which both are located is perpendicular to the vertical central axis of the hexagonal cavity.

[0019] Preferably, the horizontal central axis of the hexagonal cavity is coplanar with the vertical central plane of the axial positioning keyway.

[0020] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0021] 1. Installation accuracy and operational stability: The three-level coaxial positioning system, consisting of arm positioning, motor center positioning, and first mounting plate reference positioning, significantly improves installation accuracy and greatly reduces motor vibration amplitude.

[0022] 2. Anti-loosening and anti-detachment performance: The arm installation is designed with integrated positioning, clamping and locking, which can dynamically offset the connection gap caused by high-frequency vibration during flight. There are no loose bolts or structural displacement between the motor and the fixed seat, and between the fixed seat and the arm, reducing the risk of falling off.

[0023] 3. Versatility and maintenance efficiency: The cross-shaped adjustment slot structure allows it to be adapted to connect to the brushless motors of the entire range of mainstream drones on the market without the need to replace the main body of the mounting bracket.

[0024] 4. Lightweight effect: The split first and second mounting plate structure, combined with the lightweight design of the hollow groove, reduces the unloaded weight of the drone and improves the flight time of the same model.

[0025] 5. Extend service life: Precise coaxial installation eliminates the additional load of eccentric vibration, reduces abnormal wear of motor bearings and stator windings, and extends the effective service life of the motor; at the same time, it weakens the fatigue damage of high-frequency vibration to the boom and frame, reduces the risk of fatigue fracture of connecting parts, and reduces the use and maintenance costs of the equipment throughout its entire life cycle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the motor mounting bracket structure provided according to an embodiment of the present utility model;

[0027] Figure 2 This is an exploded view of the motor mounting bracket at a certain angle according to an embodiment of the present utility model;

[0028] Figure 3 This is a structural view of the other end of the arm connecting sleeve according to an embodiment of the present utility model;

[0029] Figure 4 This is a side view of the motor mounting bracket provided according to an embodiment of the present utility model;

[0030] Figure 5 This is a bottom view of the motor mounting bracket provided according to an embodiment of the present utility model;

[0031] Figure 6 This is a structural diagram of the first mounting plate according to an embodiment of the present utility model;

[0032] Figure 7 This is a structural diagram of the second mounting plate provided according to an embodiment of the present utility model.

[0033] The reference numerals in the figures include:

[0034] Fixed base 1, hexagonal cavity 11, upper mounting platform 111, positioning protrusion 112, lower mounting platform 113, upper fixed threaded hole 114, lower fixed threaded hole 115, arm connecting sleeve 12, axial positioning keyway 121, axial clamping part 122, axial clamping hole 123, first elastic end 124, second elastic end 125, first mounting plate 2, cross adjustment groove 21, upper fixed through hole 22, center positioning hole 23, notch 24, second mounting plate 3, lower fixed through hole 31, hollow groove 32. Detailed Implementation

[0035] To make the purpose, technical solution, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and do not constitute a limitation thereof. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this utility model. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, some operations related to this utility model are not shown or described in the specification. This is to avoid obscuring the core parts of this utility model with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0036] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other to form various implementation methods. Furthermore, the steps or actions in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This utility model provides a mounting bracket for a drone motor, wherein the drone motor itself includes an arm and a central positioning shaft. For example... Figures 1 to 7 As shown, the motor mounting base includes a mounting base 1, a first mounting plate 2, and a second mounting plate 3. The mounting base 1 includes a hexagonal cavity 11 and a machine arm connecting sleeve 12. The machine arm connecting sleeve 12 is cylindrical, with an outer diameter of 34 mm, an inner diameter of 30 mm, and a length of 32 mm. One end face of the machine arm connecting sleeve 12 is disposed on one side face of the hexagonal cavity 11. The first mounting plate 2 and the second mounting plate 3 are respectively disposed on the upper and lower surfaces of the hexagonal cavity 11 to close the hexagonal cavity 11. In this utility model, the positions of the first mounting plate 2 and the second mounting plate 3 are respectively upper and lower, and the positions of the hexagonal cavity 11 and the machine arm connecting sleeve 12 are respectively left and right, for directional description.

[0041] In this embodiment of the invention, the hexagonal cavity 11 is not a regular hexagon. Specifically, both the upper and lower surfaces of the hexagonal cavity 11 are hexagons formed by splicing two identical isosceles trapezoidal bases. Therefore, the hexagonal cavity 11 has a horizontal central axis and a vertical central axis. The overall side dimension of the hexagonal cavity 11 is 60.1 mm, the total length is 116 mm, and the wall thickness is 2.5 mm. The arm connecting sleeve 12 is disposed on one side of the hexagonal cavity 11. The hexagonal cavity 11 and the arm connecting sleeve 12 are integral 6061 / 7075 aviation aluminum alloy die-cast structures, without welding or splicing structures, avoiding accumulated tolerances during assembly. The central axis of the arm connecting sleeve 12 coincides with the horizontal central axis of the hexagonal cavity 11, and the overlap does not exceed 0.03 mm. An axial positioning keyway 121 is provided on the wall of the other end of the arm connecting sleeve 12. The axial positioning keyway 121 is located at the lowest end of the wall of the arm connecting sleeve 12 and extends along the central axis of the arm connecting sleeve 12. The width of the axial positioning keyway 121 is 3mm. The horizontal central axis of the hexagonal cavity 11 is coplanar with the vertical central plane of the axial positioning keyway 121. The length of the axial positioning keyway 121 is less than that of the arm connecting sleeve 12, that is, the axial positioning keyway 121 does not penetrate through the left and right ends of the arm connecting sleeve 12, but only forms a groove on part of the wall of the arm connecting sleeve 12. Due to the presence of the axial positioning keyway 121, a first elastic end 124 and a second elastic end 125 are formed on the walls of the arm connecting sleeve 12 on both sides of the axial positioning keyway 121. The first elastic end 124 and the second elastic end 125 are elastic. The drone motor arm is a standard carbon fiber tube with a diameter of 30mm. The end of the arm is equipped with a positioning rib. When installing the drone motor arm, a clearance fit is used. The positioning rib on the arm can be embedded into the axial positioning keyway 121 and an H8 / h7 transition fit is used so that the drone arm has no rotational freedom relative to the arm connecting sleeve 12.

[0042] Multiple axial clamping members 122 are respectively provided on the first elastic end 124 and the second elastic end 125. Each axial clamping member 122 has an axial clamping hole 123 at its center. The axial clamping hole 123 is a Φ3×20mm through hole, perpendicular to the central axis of the arm connecting sleeve 12, passing through both sides of the axial clamping member 122. The center of the axial clamping hole 123 is 5mm from the bottom of the arm connecting sleeve 12. The opening of the axial clamping hole 123 has an R3 rounded corner to accommodate M3 hexagon socket head cap screws. Multiple pairs of axial clamping members 122 are formed on the first elastic end 124 and the second elastic end 125, with the central axes of the axial clamping holes 123 of each pair of axial clamping members 122 coinciding. After the boom is installed in the boom connecting sleeve 12, the two axial clamping members 122 in each pair of axial clamping members 122 can be brought closer to each other by passing screws through the paired axial clamping holes 123, thereby pulling the first elastic end 124 and the second elastic end 125 closer together and locking the boom.

[0043] The upper and lower surfaces of the hexagonal cavity 11 are both open flange interfaces, each with an upper mounting platform 111 and a lower mounting platform 113. The upper mounting platform 111 has multiple upper fixing threaded holes 114, and the first mounting plate 2 has correspondingly multiple upper fixing through holes 22, each consisting of four Φ3mm through holes located at the four corners of the first mounting plate 2. The upper fixing threaded holes 114 correspond one-to-one with the upper fixing through holes 22. The upper fixing threaded holes 114 and upper fixing through holes 22 are used to mount the first mounting plate 2 onto the upper surface of the hexagonal cavity 11, using M3 bolts. The lower mounting platform 113 has multiple lower fixing threaded holes 115, and the second mounting plate 3 has correspondingly multiple lower fixing through holes 31, each consisting of four Φ3mm through holes located at the four corners of the second mounting plate 3. The lower fixing threaded holes 115 correspond one-to-one with the lower fixing through holes 31. The lower fixing threaded hole 115 and the lower fixing through hole 31 are used to install the second mounting plate 3 on the lower surface of the hexagonal cavity 11. The bolts used for installation are M3 bolts. After the first mounting plate 2 and the second mounting plate 3 are installed, the hexagonal cavity 11, the first mounting plate 2 and the second mounting plate 3 can form a closed cavity. The first mounting plate 2 and the second mounting plate 3 are parallel, and the planes of both are perpendicular to the vertical central axis of the hexagonal cavity 11. Specifically, in this embodiment of the present invention, the first mounting plate 2 is a 6061 carbon fiber plate with a thickness of 2mm and a size of 66.82×70.71mm. It has an overall irregular hexagonal shape with R2 rounded corners. The second mounting plate 3 is 2mm thick and made of 6061 PLA material. It has an overall trapezoidal hexagonal structure with a width of 56.03mm at the top, a width of 48.02mm at the bottom, and a total height of 56mm. The corners have R1 / R2 rounded corners.

[0044] In addition, a positioning protrusion 112 is provided at the center of the leftmost side of the upper mounting platform 111, and a notch 24 is provided at the corresponding position on the first mounting plate 2. The positioning protrusion 112 and the notch 24 cooperate to limit the installation direction of the first mounting plate 2.

[0045] The first mounting plate 2 is provided with a cross-shaped adjustment groove 21, the center of which coincides with the center of the first mounting plate 2. The cross-shaped adjustment groove 21 consists of four long, rounded grooves arranged in a cross shape. Each groove is 3.2 mm wide and 20 mm long, with rounded corners of R1.5 at both ends. Since drone motors come in different sizes, the drone motor can be installed at different positions on the cross-shaped adjustment groove 21 during installation, allowing for fine-tuning of the installation position to accommodate drone motors of different sizes.

[0046] The first mounting plate 2 is also provided with a center positioning hole 23, which is a Φ8mm through hole. The center of the center positioning hole 23 also coincides with the center of the first mounting plate 2, and the coaxiality tolerance does not exceed 0.03mm. The center positioning shaft of the UAV motor can be inserted into the center positioning hole 23, and the center positioning hole 23 and the center positioning shaft of the UAV motor adopt an H7 / h6 transition fit to achieve precise positioning of the radial axis of the UAV motor. In addition, the central axis of the center positioning hole 23 coincides with the vertical central axis of the hexagonal cavity 11, and the perpendicularity tolerance of these two central axes does not exceed 0.02mm.

[0047] The second mounting plate 3 is also provided with multiple hollowed-out grooves 32, which are arranged in parallel at equal intervals for installing vibration damping components and simultaneously reducing weight. In this embodiment of the present invention, there are 5 hollowed-out grooves 32, each with a width of 3mm and a length of 40mm, and the ends are rounded with R1 corners.

[0048] When manufacturing the motor mounting base, all holes and slots are machined with the horizontal central axis of the hexagonal cavity 11 as the reference, eliminating the cumulative tolerance caused by multi-reference machining and improving the overall structural accuracy.

[0049] When assembling the motor mounting base, firstly, the first mounting plate 2 and the second mounting plate 3 are locked and fixed to the upper and lower surfaces of the hexagonal cavity 11 respectively using M3 hexagon socket head cap screws, ensuring that the center positioning hole 23 of the first mounting plate 2 is coaxial with the hexagonal cavity 11, completing the pre-assembly of the closed cavity and forming a complete installation reference system. Then, the arm connecting sleeve 12 is fitted into the end of the arm, so that the positioning rib on the arm is fully engaged in the axial positioning keyway 121 on the inner wall of the arm connecting sleeve 12. Through the cooperation of the axial positioning keyway 121 and the positioning rib, radial coaxial positioning and circumferential anti-rotation are achieved, ensuring that the mounting base 1 and the central axis of the arm are completely coincident, and preventing the mounting base 1 from being misaligned from the installation reference end. Then, the M3 hexagonal socket head cap screws are inserted into the axial clamping hole 123 and gradually tightened. The axial preload of the bolts pushes the first elastic ends 124 and the second elastic ends 125 on both sides of the axial positioning keyway 121 to contract towards the center, so that the inner wall of the arm connecting sleeve 12 and the outer wall of the arm fit tightly without gaps, completing the clamping and locking of the fixed seat 1 and the arm, eliminating the fit gap between them. Next, the center positioning shaft of the UAV motor is aligned and inserted into the center positioning hole 23 of the first mounting plate 2. Through transition fit, the radial axis of the motor is accurately positioned, ensuring that the central axis of the motor, the fixed seat 1, and the arm are completely coincident, completely eliminating the motor axis offset. After the motor is fitted into the center positioning hole 23, the lower end of the first mounting plate 2 of the motor is attached to the motor mounting flange plate. According to the mounting hole distance of the motor, the bolt installation position is finely adjusted through the cross adjustment groove 21 to make the motor mounting hole and the cross adjustment groove 21 completely aligned, so that different specifications of motors can be adapted without replacing the first mounting plate 2. Next, pass the hexagonal socket head cap screws through the motor mounting hole and the cross adjustment slot 21 of the first mounting plate 2, and tighten them evenly diagonally to lock and fix the motor. After installation, the center positioning hole 23 restricts the radial displacement of the motor, the axial positioning keyway 121 restricts the circumferential rotation of the fixed seat 1 and the arm, and the clamping locking structure eliminates the fit clearance between the fixed seat 1 and the arm. The triple structure works together to offset the high-frequency vibration during the flight of the UAV in real time, realize the dynamic compensation of the connection clearance, avoid bolt loosening and motor displacement, and maintain the installation accuracy of the motor in the long term.

[0050] This utility model embodiment applies the motor mounting bracket to a 6-rotor UAV and conducts tests. The coaxiality error of the motor installation is within 0.04mm, the vibration amplitude of the motor operation is reduced by 72%, the hovering accuracy of the UAV is improved to ±0.05m, and there is no vibration or ghosting in the aerial footage. After 250 hours of continuous flight testing, there was no loosening of bolts or structural displacement, and the installation accuracy retention rate was 99.2%. It is compatible with the entire 2270 series motors without the need to replace the main body of the mounting bracket. Compared with the traditional mounting bracket of the same specification, it reduces weight by 32%, increases the UAV's flight time by 10%, and reduces the time for a single motor disassembly and assembly from the traditional 5 minutes to 1.2 minutes, improving assembly efficiency by 76%.

[0051] In summary, the motor mounting bracket of this utility model has the following advantages:

[0052] 1. Installation Accuracy and Operational Stability: Utilizing a three-level coaxial positioning system—arm positioning, motor center positioning, and first mounting plate reference positioning—the motor installation coaxiality error is consistently controlled within 0.05mm, far superior to traditional fixed mounts. Under the rated speed of 4800rpm for the 2208-3510 series brushless motors, motor vibration amplitude is reduced by 72%, drone hovering accuracy reaches ±0.05m, and flight path following deviation is ≤0.12m, significantly improving the effectiveness of high-precision operations such as aerial photography and surveying. The installation accuracy retention rate reaches 99.2%, mitigating flight safety risks from the structural root.

[0053] 2. Anti-loosening and anti-detachment performance: The arm installation features an integrated design for positioning, clamping, and locking, which can dynamically offset the connection gaps caused by high-frequency vibrations during flight. After 250 hours of continuous flight testing, there was no loosening of bolts or structural displacement between the motor and the mounting base, or between the mounting base and the arm.

[0054] 3. Versatility and Maintenance Efficiency: The adjustable mounting structure is compatible with the mainstream 2208-3510 series brushless motors for drones, eliminating the need to replace the main mounting bracket. The calibration-free pre-positioning design reduces the assembly time of a single motor from 5 minutes to 1.2 minutes, improving assembly efficiency by 76%. Furthermore, after disassembly and maintenance, reinstallation does not require re-alignment and leveling, reducing mass production assembly and on-site maintenance costs.

[0055] 4. Lightweight effect: The split first and second mounting plate structure, combined with the lightweight design of the hollow groove, reduces the weight by 32% compared to the traditional one-piece mounting base of the same specifications. While ensuring structural strength, it reduces the empty weight of the drone. Actual tests show that it can increase the flight time of the same model by 10%, meeting the needs of long-endurance operations.

[0056] 5. Extend service life: Precise coaxial installation eliminates the additional load of eccentric vibration, reduces abnormal wear of motor bearings and stator windings, and increases the effective service life of the motor by more than 50%; at the same time, it reduces the fatigue damage of high-frequency vibration to the boom and frame, reduces the risk of fatigue fracture of connecting parts, and reduces the use and maintenance costs of the equipment throughout its entire life cycle.

[0057] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0058] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A mounting bracket for a drone motor, wherein the drone motor includes an arm and a central positioning shaft, characterized in that, The motor mounting base includes: a hexagonal cavity, a machine arm connecting sleeve, a first mounting plate, and a second mounting plate; one end of the machine arm connecting sleeve is connected to the hexagonal cavity; the first mounting plate and the second mounting plate are respectively disposed on the upper and lower surfaces of the hexagonal cavity for sealing the hexagonal cavity; The first mounting plate is used to support the drone motor; An axial positioning keyway is provided on the cylinder wall at the other end of the arm connecting sleeve. The axial positioning keyway forms a first elastic end and a second elastic end on the cylinder wall of the arm connecting sleeve. The axial positioning keyway extends along the central axis of the arm connecting sleeve, and the length of the axial positioning keyway is less than that of the arm connecting sleeve. Multiple pairs of axial clamping members are respectively provided on the first elastic end and the second elastic end, and the axial clamping member is provided with an axial clamping hole at its center. The axial clamping hole is used to connect the corresponding axial clamping component, which is used to pull the first elastic end and the second elastic end to lock the machine arm.

2. The UAV motor mounting bracket according to claim 1, characterized in that, The hexagonal cavity has an upper mounting platform and a lower mounting platform on its upper and lower surfaces, respectively. The upper mounting platform has an upper fixed threaded hole for mounting the first mounting plate; the lower mounting platform has a lower fixed threaded hole for mounting the second mounting plate.

3. The UAV motor mounting bracket according to claim 2, characterized in that, A positioning protrusion is provided at the center of one side of the upper mounting platform, and a notch is provided on the first mounting plate. The positioning protrusion cooperates with the notch to restrict the direction of the first mounting plate.

4. The UAV motor mounting bracket according to claim 1, characterized in that, The first mounting plate is provided with a cross-shaped adjustment slot, which is used to install drone motors of different sizes.

5. The UAV motor mounting bracket according to claim 1, characterized in that, The first mounting plate is also provided with a central positioning hole, which is transitionally fitted with a central positioning shaft.

6. The UAV motor mounting bracket according to claim 5, characterized in that, The central axis of the central positioning hole coincides with the vertical central axis of the hexagonal cavity, and the perpendicularity tolerance between the two central axes does not exceed 0.02 mm.

7. The UAV motor mounting bracket according to claim 1, characterized in that, The second mounting plate is provided with multiple hollowed-out grooves, which are arranged in parallel at equal intervals.

8. The UAV motor mounting bracket according to claim 1, characterized in that, The hexagonal cavity and the connecting sleeve of the machine arm are integral die-cast structures, and the horizontal central axis of the hexagonal cavity coincides with the central axis of the connecting sleeve of the machine arm.

9. The UAV motor mounting bracket according to claim 1, characterized in that, The first mounting plate and the second mounting plate are parallel, and the plane in which both are located is perpendicular to the vertical central axis of the hexagonal cavity.

10. The UAV motor mounting bracket according to claim 1, characterized in that, The horizontal central axis of the hexagonal cavity is coplanar with the vertical central plane of the axial positioning keyway.

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