Multifunctional unmanned aerial vehicle special test platform

Abstract

This invention discloses a multifunctional test bench for unmanned aerial vehicles (UAVs), relating to the field of UAV testing technology. It includes a base, on which mounting bracket one and mounting bracket two are fixedly connected. Mounting bracket two is equipped with a limiting mechanism, which includes a position seat slidably mounted on the mounting bracket two. A connecting shaft is fixedly connected to the position seat, and a movable seat is slidably mounted on one end of the connecting shaft. A docking shaft is connected to the movable seat via a ball joint, and one end of the docking shaft is fixedly connected to the drone body. A suspension rope is fixedly connected to the drone body, and a load-bearing plate is provided on the base for mounting the load-bearing plate. A fixing mechanism is provided inside the load-bearing plate, through which the suspension rope passes and is fixed. This invention can limit and control the UAV during testing, preventing damage and dangerous accidents during the test.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) testing technology, and in particular to a multifunctional UAV-specific testing platform. Background Technology

[0002] Unmanned aerial vehicles (UAVs), also known as drones, are aircraft that do not require a human pilot and are typically controlled by remote or autonomous control systems. UAVs have a wide range of applications, covering civilian, commercial, and military fields. UAV test benches are crucial equipment for performance evaluation, reliability testing, and technology verification of UAVs. They primarily perform flight stability testing, power system evaluation, and load testing. Existing test benches have relatively simple functions. For example, load testing commonly involves suspending heavy objects from the UAV via ropes or connecting ropes to force sensors. This measurement process has some shortcomings. Firstly, rope length or external wind force can significantly affect the load test results. Secondly, the lack of limit control for the UAV during testing makes it susceptible to damage or danger in the event of speed loss. Therefore, this invention proposes a test bench that can provide limit control for the UAV to prevent damage and dangerous accidents during testing. Summary of the Invention

[0003] To address the aforementioned technical issues, this invention provides a multifunctional test bench specifically designed for unmanned aerial vehicles (UAVs). This bench can provide limit protection for UAVs during load testing while simultaneously accommodating the UAV's multiple degrees of freedom in flight.

[0004] The technical solution used in this invention is as follows: a multifunctional test bench for unmanned aerial vehicles (UAVs), comprising a base, on which a mounting frame one and a mounting frame two are welded and fixed; a limiting mechanism is provided on the mounting frame two, the limiting mechanism including a position seat slidably mounted on the mounting frame two, a connecting shaft fixed on the position seat, a movable seat slidably mounted on one end of the connecting shaft, a docking shaft connected to the movable seat by a ball joint, and an organic body fixedly connected to one end of the docking shaft; a suspension rope is tied and fixed to the organic body, and an integrally formed load plate is provided on the base for mounting the load plate; a fixing mechanism is provided inside the load plate, the suspension rope passes through the inside of the fixing mechanism and is fixed by the fixing mechanism.

[0005] As a preferred embodiment, airflow boxes are fixedly installed on both sides of the mounting frame to release airflow and simulate real airflow conditions to test the anti-interference stability performance of the UAV.

[0006] As a preferred embodiment, several load-bearing positioning shafts are uniformly welded and fixed to the end face of the load-bearing disc in the circumferential direction. The load-bearing disc is a hollow disc structure with hollow circular holes. The number of hollow circular holes matches the number of load-bearing positioning shafts one by one. The load-bearing disc is positioned and installed by being fitted onto the load-bearing positioning shafts through the hollow circular holes. The load weight is adjusted by stacking multiple load-bearing discs.

[0007] As a preferred embodiment, the fixing mechanism includes a mounting cylinder coaxially fixed in the central area of ​​the load pan. The center of the load pan is a cylindrical hollow structure precisely matched with the outer diameter of the mounting cylinder. The outer wall of the mounting cylinder is seamlessly fitted with the inner wall of the hollow structure in the center of the load pan. A fixed motor is fixedly installed on the outside of the mounting cylinder, and a reel is rotatably mounted on the inside of the mounting cylinder via bearings. The input end of the reel is rigidly connected to the output shaft of the fixed motor via a coupling and is driven to rotate by the fixed motor. A rope hole is radially opened on the reel, through which the suspension rope passes. A fixing groove is circumferentially opened at the end of the reel, and a fixing electric cylinder is fixedly installed on the outside of the mounting cylinder. The telescopic rod of the fixing electric cylinder engages with the fixing groove to fix the reel.

[0008] As a preferred embodiment, the limiting mechanism includes a motor and a guide rod fixedly mounted on the mounting frame 2, and a lead screw rotatably mounted on the mounting frame 2 via bearings. The input end of the lead screw rotatably is coaxially connected to the output shaft of the motor and is driven to rotate by the motor. The position seat is slidably engaged with the guide rod rotatably, and the position seat and the lead screw rotatably form a helical pair. A support mechanism is provided at the bottom of the position seat to support the docking shaft.

[0009] As a preferred embodiment, the support mechanism includes a deflection rod rotatably hinged to the bottom of the position seat via a rotating shaft, and a deflection motor fixedly mounted at the bottom of the position seat. The output shaft of the deflection motor is rigidly connected to the rotating shaft of the deflection rod via a coupling, which drives the deflection rod to rotate around the rotating shaft. One end of the deflection rod is integrally formed with an arc-shaped support part, which fits against the outer wall of the docking shaft to support the docking shaft. The support mechanism also includes a deflection fixing electric cylinder fixedly mounted at the bottom of the position seat. A deflection fixing ring is welded and fixed on the deflection rod. The end of the telescopic rod of the deflection fixing electric cylinder is engaged with the deflection fixing ring. When the telescopic rod extends, it is engaged in the deflection fixing ring to fix the position of the deflection rod. When the telescopic rod retracts, the fixing is released.

[0010] As a preferred embodiment, the end of the docking shaft is integrally formed with a ball joint, and a positioning hole is formed radially on the ball joint. A ball joint seat is fixedly mounted on the movable seat, and the ball joint seat and the ball joint form a ball joint. The ball joint formed by the ball joint seat and the ball joint can limit the range of motion of the machine body, that is, allow the machine body to perform ±45° pitch and ±360° deflection. The ball joint seat is also provided with a positioning hole that matches the positioning hole of the ball joint. A slide is fixed at the end of the connecting shaft. The slide has an inverted U-shaped guide rail structure, and the upper part of the movable seat is integrally formed with... It has a slider that matches the inverted U-shaped guide rail. The moving seat slides with the slide bracket through the slider. The slider is embedded in the groove of the inverted U-shaped guide rail to achieve a fixed connection and sliding fit between the two. The ball joint seat and the end of the connecting shaft are coaxially connected. When connected, the end face of the ball joint seat fits with the end face of the connecting shaft to ensure coaxiality. The adjustment mechanism inside the connecting shaft is embedded in the connecting shaft. The ball joint seat and the ball joint part are connected by an embedded ball joint. The spherical surface of the ball joint part is embedded in the ball socket of the ball joint seat to achieve multi-angle rotation.

[0011] As a preferred embodiment, the adjustment mechanism includes an adjustment motor fixedly installed inside the connecting shaft, an adjustment gear fixedly installed on the output shaft of the adjustment motor, and an adjustment disk rotatably installed inside the connecting shaft. The outer wall of the adjustment disk is provided with a gear ring that meshes with the adjustment gear. An adjustment electric cylinder is fixedly installed on the adjustment disk, and a mating cylinder is fixedly installed on the telescopic rod of the adjustment electric cylinder. Several electromagnetic sliding support rods are arranged circumferentially on the outer wall of the mating cylinder. The mating cylinder can be coaxially engaged with the positioning hole on the ball joint and the ball joint seat. The electromagnetic sliding support rods extend out and support the inner side of the positioning hole on the ball joint to adjust and fix the angle of the mating shaft.

[0012] The beneficial effects of this invention compared with the prior art are: (1) The length of the suspension rope can be controlled and adjusted according to the test requirements. As the height of the machine changes, the suspension rope moves inside the rope hole. When the required length for hoisting is met, the fixed motor drives the reel to rotate to wind the suspension rope. Then, the fixed electric cylinder telescopic rod cooperates with the fixed groove at the end of the reel to fix the reel, so that the suspension rope is always taut, eliminating the interference of rope length on load testing, and the data is more accurate; (2) When the speed of the machine body becomes out of control, such as when the load falls or the suspension rope breaks, the range of motion of the machine body is limited only by the ball joint formed by the ball joint seat and the ball joint part. This can prevent the machine body from colliding with other parts of the test bench due to excessive movement caused by loss of control, and achieve safety limit protection; (3) The inner side of the positioning hole on the fixed ball joint part is supported by the electromagnetic sliding support rod, and the adjustment motor drives the adjustment disk to rotate, thereby driving the docking shaft and the machine body to rotate, so as to adjust the installation angle of the machine body, which is beneficial to subsequent test operations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the mounting structure of the position seat of the present invention;

[0015] Figure 3 This is a schematic diagram of the load-bearing plate installation structure of the present invention;

[0016] Figure 4 This is a schematic diagram of a partial installation structure of the load-bearing disc of the present invention;

[0017] Figure 5 This is a schematic diagram of the fixing mechanism structure of the present invention;

[0018] Figure 6 This is a schematic diagram of the limiting mechanism and support mechanism of the present invention;

[0019] Figure 7 This is a schematic diagram of the installation of the connecting shaft and the mating shaft of the present invention;

[0020] Figure 8 This is a schematic diagram of the support mechanism structure of the present invention;

[0021] Figure 9 This is a partial structural diagram of the support mechanism of the present invention;

[0022] Figure 10 This is a schematic diagram of the end structure of the docking shaft of the present invention;

[0023] Figure 11 This is a schematic diagram showing the connection between the carriage and the ball joint seat of the present invention;

[0024] Figure 12 This is a schematic diagram of the carriage structure of the present invention;

[0025] Figure 13 This is a schematic diagram of the cross-sectional structure of the connecting shaft of the present invention;

[0026] Figure 14 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0027] Figure 15 This is a schematic diagram of the cross-sectional structure of the connecting shaft of the present invention.

[0028] Reference numerals: 1-Base; 2-Airflow box; 3-Mounting bracket one; 4-Mounting bracket two; 5-Motor one; 6-Guide rod one; 7-Screw one; 8-Position seat; 9-Machine body; 10-Hanging rope; 11-Loading plate; 12-Bearing plate; 13-Bearing positioning shaft; 14-Mounting cylinder; 15-Fixed motor; 16-Wheel; 17-Rope hole; 18-Fixed electric cylinder; 19-Connecting shaft; 20-Slide; 21-Dating shaft; 22-Support part; 23-Deflection rod; 24-Deflection motor; 25-Deflection fixed electric cylinder; 26-Deflection fixed ring; 27-Moving seat; 28-Spherical hinge seat; 29-Spherical hinge part; 30-Adjusting electric cylinder; 31-Adjusting plate; 32-Adjusting motor; 33-Adjusting gear; 34-Matching cylinder; 35-Electromagnetic sliding support rod. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 15 As shown, the present invention aims to complete the load test of the drone. During the load test, the flight range of the drone can be limited by the ball joint connection, which not only ensures that the drone has a multi-degree-of-freedom flight attitude, but also prevents it from crashing due to loss of control.

[0031] Specifically, a multi-functional test bench for unmanned aerial vehicles (UAVs) includes a base 1, on which mounting bracket 3 and mounting bracket 4 are welded and fixed. Mounting bracket 4 is provided with a limiting mechanism, which includes a position seat 8 slidably mounted on mounting bracket 4. A connecting shaft 19 is welded and fixed on the position seat 8. A movable seat 27 is slidably mounted on one end of the connecting shaft 19. A docking shaft 21 is connected to the movable seat 27 by a ball joint. One end of the docking shaft 21 is fixedly connected to the body 9. A suspension rope 10 is tied and fixed to the body 9. An integrally formed load plate 11 is provided on the base 1 for mounting a load plate 12. A fixing mechanism is provided inside the load plate 11. The suspension rope 10 passes through the inside of the fixing mechanism and is fixed by the fixing mechanism.

[0032] Airflow boxes 2 are fixedly installed on both sides of the mounting bracket 3 to release airflow;

[0033] Several load-bearing positioning shafts 13 are evenly fixed circumferentially on the end face of the load-bearing disc 11. The load-bearing disc 12 is a hollow disc structure with hollow circular holes. The number of hollow circular holes matches the number of load-bearing positioning shafts 13. The load-bearing disc 12 is positioned and installed on the load-bearing positioning shafts 13 through the hollow circular holes. The load weight is adjusted by stacking multiple load-bearing discs 12.

[0034] The fixing mechanism includes a mounting cylinder 14 coaxially welded and fixed to the central area of ​​the load plate 11. The center of the load plate 11 is a cylindrical hollow structure that precisely matches the outer diameter of the mounting cylinder 14. The outer wall of the mounting cylinder 14 is seamlessly fitted to the inner wall of the hollow structure in the center of the load plate 11. A fixed motor 15 is fixedly installed on the outside of the mounting cylinder 14. A reel 16 is rotatably installed on the inside of the mounting cylinder 14 via bearings. The input end of the reel 16 is rigidly connected to the output shaft of the fixed motor 15 via a coupling. A rope hole 17 is radially opened on the reel 16, through which the lifting rope 10 passes. A fixing groove is circumferentially opened at the end of the reel 16, and a fixing electric cylinder 18 is fixedly installed on the outside of the mounting cylinder 14. The telescopic rod of the fixing electric cylinder 18 engages with the fixing groove to fix the reel 16.

[0035] The limiting mechanism includes a motor 5 and a guide rod 6 fixedly mounted on the mounting bracket 2 4, and a lead screw 7 rotatably mounted on the mounting bracket 2 4 via bearings. The input end of the lead screw 7 is coaxially connected to the output shaft coupling of the motor 5. The position seat 8 is in sliding clearance fit with the guide rod 6, and the position seat 8 and the lead screw 7 form a helical pair. A support mechanism is provided at the bottom of the position seat 8 to support the docking shaft 21. The support mechanism includes a deflection rod 23 rotatably hinged to the bottom of the position seat 8 via a rotating shaft, and a fixed... A deflection motor 24 is fixedly installed at the bottom of the position seat 8. The output shaft of the deflection motor 24 is rigidly connected to the rotating shaft of the deflection rod 23 through a coupling. One end of the deflection rod 23 is integrally formed with an arc-shaped support part 22, which fits against the outer wall of the docking shaft 21. The support mechanism also includes a deflection fixing electric cylinder 25 fixedly installed at the bottom of the position seat 8. A deflection fixing ring 26 is welded and fixed on the deflection rod 23. The end of the telescopic rod of the deflection fixing electric cylinder 25 is engaged with the deflection fixing ring 26.

[0036] The end of the docking shaft 21 is integrally formed with a ball joint 29. The ball joint 29 has a positioning hole formed radially. A ball joint seat 28 is fixedly mounted on the movable seat 27. The ball joint seat 28 and the ball joint 29 form a ball joint pair. The ball joint pair formed by the ball joint seat 28 and the ball joint 29 can limit the range of motion of the machine body 9, allowing the machine body 9 to perform ±45° pitch and ±360° deflection. The ball joint seat 28 also has a positioning hole that matches the positioning hole of the ball joint 29. A [missing information - likely a component or part] is welded and fixed to the end of the connecting shaft 19. The slide 20 has an inverted U-shaped guide rail structure. The top of the movable seat 27 is integrally formed with a slider that matches the inverted U-shaped guide rail. The movable seat 27 and the slide 20 are slidably engaged through the slider. The slider is embedded in the groove of the inverted U-shaped guide rail to achieve a fixed connection and sliding engagement between the two. The ball joint seat 28 and the end of the connecting shaft 19 have a coaxial docking structure. When docking, the end face of the ball joint seat 28 is in contact with the end face of the connecting shaft 19. The adjustment mechanism inside the connecting shaft 19 is embedded in the connecting shaft 19.

[0037] The adjustment mechanism includes an adjustment motor 32 fixedly installed inside the connecting shaft 19. An adjustment gear 33 is fixedly installed on the output shaft of the adjustment motor 32, and an adjustment disk 31 is rotatably installed inside the connecting shaft 19. The outer wall of the adjustment disk 31 is provided with a gear ring that meshes with the adjustment gear 33. An adjustment electric cylinder 30 is fixedly installed on the adjustment disk 31. A mating cylinder 34 is fixedly installed on the telescopic rod of the adjustment electric cylinder 30. Several electromagnetic sliding support rods 35 are arranged circumferentially on the outer wall of the mating cylinder 34. The mating cylinder 34 can be coaxially mated with the positioning holes on the ball joint 29 and the ball joint seat 28. The electromagnetic sliding support rods 35 extend out and support the inner side of the positioning hole on the ball joint 29 to adjust and fix the angle of the mating shaft 21.

[0038] The specific work process is as follows:

[0039] In the initial state of the equipment, the deflection rod 23 remains horizontal, the extension rod of the deflection fixing electric cylinder 25 extends and engages with the deflection fixing ring 26, and the support part 22 fits against the docking shaft 21 to achieve support, that is, to support the machine body 9 and ensure the stable installation of the machine body 9.

[0040] The lifting rope 10 is fixedly connected to the machine body 9. The motor 5 drives the lead screw 7 to rotate, causing the position seat 8 to move, thereby adjusting the height of the machine body 9. As the height of the machine body 9 changes, the lifting rope 10 moves inside the rope hole 17. When the required lifting length is met, the fixed motor 15 drives the reel 16 to rotate to wind the lifting rope 10. Then, the telescopic rod of the fixed electric cylinder 18 engages with the fixed groove at the end of the reel 16 to fix the reel 16, keeping the lifting rope in a taut state. This eliminates the interference of rope length on load testing, resulting in more accurate data. By continuously adjusting the height of the machine body 9, the length of the lifting rope 10 can be conveniently adjusted to measure the load at different lifting lengths. Furthermore, different numbers of load plates 12 can be installed on the load plate 11 by stacking to change the load weight, achieving rapid and stable adjustment of the load size.

[0041] During testing, the control unit 9 is controlled to fly upwards. When the unit 9 drives the load plate 11 upwards, and the distance between the bottom of the load plate 11 and the top surface of the base 1 reaches the preset value of 5cm, the limit switch is triggered to send an electrical signal to the deflection motor 24. After receiving the signal, the deflection motor 24 drives the deflection rod 23 to deflect downwards by 90°. During the deflection process, the deflection fixing cylinder 25 is unlocked in advance. That is, the telescopic rod of the deflection fixing cylinder 25 retracts first to release the fixation of the deflection rod 23. Then, the deflection motor 24 drives the deflection rod 23 to rotate around the axis to complete the unlocking action. After the deflection is completed, the deflection rod 23 is in a vertical downward state, completely avoiding the movement trajectory of the docking shaft 21 and the unit 9, thus avoiding collision with the unit 9.

[0042] Specifically, when the body 9 moves the load plate 11 vertically upward, the docking shaft 21 moves upward along with the body 9. The inverted U-shaped guide rail of the slide 20 and the slider of the moving seat 27 have a convex-concave fit structure. The inner side of the guide rail is provided with a convex limiting structure, and the slider is provided with a matching groove, which can restrict the moving seat 27 to slide only in a straight line along the vertical direction of the slide. Furthermore, the body 9 can perform multi-degree-of-freedom flight under the ball joint connection. Its range of motion is limited by the ball joint formed by the ball joint seat 28 and the ball joint part 29, that is, the body 9 is allowed to move ±45°. It can pitch, turn ±360°, and ascend and descend vertically without interfering with normal flight attitude. During the movement of the aircraft 9, when speed loss occurs, such as when the load suddenly falls or the suspension rope breaks, the maximum range of movement of the aircraft 9 is limited by the ball joint, which can avoid accidents such as collisions. When the aircraft 9 pulls the load plate 11 to rise, the load test is completed. Furthermore, during the test, airflow can also be released from the side through the airflow box 2 to simulate real airflow conditions in order to test the anti-interference stability of the aircraft 9 under load.

[0043] After the test is completed, the control unit 9 slowly lowers the load plate 11 onto the base 1. Once the load plate 11 is in contact with the base 1, the limit switch sends a reset signal. The deflection motor 24 receives the reset signal and drives the deflection rod 23 to rotate from a vertically downward state to a horizontal state, and the support part 22 re-fits against the docking shaft 21. The deflection fixing cylinder 25 receives the signal, and the telescopic rod extends and engages with the deflection fixing ring 26, completing the fixing of the deflection rod 23 to ensure the stable installation of the unit 9. In the reset state of the unit 9, the adjusting cylinder 30 controls the movement and extension of the mating cylinder 34, which simultaneously engages with the ball joint. The positioning holes on part 29 and ball joint seat 28 are coaxially engaged. The electromagnetic sliding support rod 35 is controlled to move radially and support and fix the inner side of the positioning hole on ball joint part 29. The adjustment motor 32 is started to drive the adjustment gear 33 to rotate, which drives the adjustment disk 31 to rotate. The adjustment disk 31 drives the adjustment cylinder 30, mating cylinder 34 and docking shaft 21 to rotate around the ball joint center, thereby adjusting the installation angle of the machine body 9. The operator can set a visual sensor to identify the angle and orientation of the machine body 9 and feed the orientation information back to the control system to control the operation of the adjustment motor 32 to drive the docking shaft 21 and the machine body 9 to rotate.

[0044] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multifunctional test bench for unmanned aerial vehicles (UAVs), used for UAV load testing, comprising a base, on which mounting bracket one and mounting bracket two are fixed; characterized in that: Mounting frame two is equipped with a limiting mechanism, which includes a position seat slidably mounted on mounting frame two, a connecting shaft fixed on the position seat, an inverted U-shaped slide fixed to one end of the connecting shaft, a movable seat vertically slidably mounted on the slide, a ball joint seat on the movable seat, and a ball joint portion integrally formed at the end of the docking shaft. The ball joint seat and the ball joint portion form a ball joint, which allows the machine body to perform ±45° pitch and ±360° yaw movements, realizing multi-degree-of-freedom movement and runaway limit protection. One end of the docking shaft is fixedly connected to the machine body. A suspension rope is connected to the machine body, and an integrally formed load plate is provided on the base, with several load-bearing positioning shafts on the load plate. The mounting base is used to position and install stackable load-bearing discs to adjust the load. The inner side of the load-bearing disc is equipped with a fixing mechanism for tensioning and securing the lifting rope. The fixing mechanism includes a mounting cylinder fixed to the center of the load-bearing disc, a fixed motor on the outer side of the mounting cylinder, and a rotatable reel on the inner side of the mounting cylinder, driven by the fixed motor. The lifting rope passes through the reel. A fixing electric cylinder for locking the reel is also provided on the outer side of the mounting cylinder. A support mechanism is provided at the bottom of the positioning base. The support mechanism includes a deflection rod hinged to the bottom of the positioning base, a deflection motor driving the deflection rod, and a deflection fixing electric cylinder for locking the deflection rod. One end of the deflection rod is equipped with a support portion for supporting the docking shaft. A deflection fixing ring is fixedly installed on the deflection rod. The end of the telescopic rod of the deflection fixing electric cylinder is engaged with the deflection fixing ring. When the telescopic rod extends, it is engaged in the deflection fixing ring to fix the position of the deflection rod. When the telescopic rod retracts, the fixing is released. The ball joint is provided with a positioning hole along the radial direction, and the ball joint seat is also provided with a positioning hole that matches the positioning hole of the ball joint; the slide is an inverted U-shaped guide rail structure, and the movable seat is integrally formed with a slider that matches the inverted U-shaped guide rail. The movable seat and the slide are slidably engaged through the slider. The ball joint seat and the end of the connecting shaft are coaxially connected. When connected, the end face of the ball joint seat is in contact with the end of the connecting shaft.

2. The multifunctional UAV-specific test bench according to claim 1, characterized in that: Airflow boxes are fixedly installed on both sides of the mounting bracket to release airflow. 3.The multifunctional test platform for unmanned aerial vehicles of claim 1, wherein: The load-bearing disc is a hollow disc structure with hollow circular holes. The number of hollow circular holes matches the number of load-bearing positioning shafts. The load-bearing disc is positioned and installed by being fitted onto the load-bearing positioning shaft through the hollow circular holes. The load weight is adjusted by stacking multiple load-bearing discs.

4. The multifunctional unmanned aerial vehicle special test platform according to claim 1, characterized in that: The reel has a rope hole through which the suspension rope passes; the end of the reel has a fixing groove, which is fitted with the extension rod of the electric cylinder to fix the reel.

5. The multifunctional unmanned aerial vehicle special test platform according to claim 1, characterized in that: The limiting mechanism includes a motor and a guide rod fixedly mounted on the mounting frame 2, and a lead screw 1 rotatably mounted on the mounting frame 2. The lead screw 1 is driven by the motor, and the position seat is slidably connected to the guide rod 1, and the position seat and the lead screw 1 form a helical pair. 6.The multifunctional test platform for unmanned aerial vehicles of claim 1, wherein: The connecting shaft is equipped with an adjustment mechanism, which includes an adjustment motor fixedly installed inside the connecting shaft. An adjustment gear is fixed on the output shaft of the adjustment motor, and an adjustment disc is rotatably installed inside the connecting shaft. An adjustment electric cylinder is fixedly installed on the adjustment disc, and a mating cylinder is fixedly installed on the telescopic rod of the adjustment electric cylinder. An electromagnetic sliding support rod is arranged on the mating cylinder. The mating cylinder can be coaxially mated with the positioning hole on the ball joint and the ball joint seat. The inner side of the positioning hole on the ball joint is supported and fixed by the electromagnetic sliding support rod to adjust and fix the angle of the mating shaft.

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