A multifunctional rotor thrust test device

Abstract

The present invention discloses a multifunctional rotor thrust test device, belonging to the technical field of rotor thrust test devices, which includes a plurality of test platforms capable of revolving coaxially and a locking member capable of locking the test platforms on their rotation paths. The plurality of test platforms are arranged at intervals in the vertical direction. A test pull rod and a tension sensor are arranged on the test platforms. The axis of the test pull rod intersects with the axis of revolution of the test platforms. The test pull rod includes a hinged end vertically hinged on the test platform and a suspended end extending out of the test platform. An installation base for vertically installing a driving motor with a self - contained rotor is provided on the suspended end. The tension sensor is located between the hinged end and the suspended end. The tension - receiving end of the tension sensor is hinged with a connecting rod for hinging with the test pull rod. It has diverse test functions and a wide range of research parameters. It can study the thrust, aerodynamic interference under single - rotor, double - rotor or multi - rotor conditions, as well as the influence of parameters such as airfoil, radius, rotational speed, and the overlapping area of upper and lower rotors on the rotor thrust.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor thrust test devices, and particularly to a multifunctional rotor thrust test device. Background Art

[0002] With the development of unmanned aerial vehicle (UAV) rotor technology, more and more civilian rotor UAVs have come into people's view. Rotor UAVs have the advantages of vertical takeoff and landing, hovering, low-speed flight, high maneuverability, and portability. Therefore, most current civilian UAVs use rotors as their main power systems. A rotor is a device that generates thrust by rotation. For a single rotor, the magnitude of the thrust it generates is affected by many factors such as radius, airfoil, and rotational speed. For a coaxial dual rotor, the distance between the upper and lower rotors is also an important factor affecting the thrust change. For a multi-rotor with staggered upper and lower rotors, different overlapping areas of the blades result in different aerodynamic interferences between the blades, which in turn affect the magnitude of the thrust. Currently, most rotor thrust measurement devices are for single rotor measurement, such as the "UAV Rotor Overall Static Balance and Unidirectional Dynamic Balance Test System" disclosed in the patent number "201811514548.2", or for coaxial dual rotor measurement, such as the "Rotor Thrust and Torque Test Device" disclosed in the patent number "201720333221.X". However, there are few dedicated measurement devices for multi-rotors with staggered upper and lower rotors, and there is no unified standard or theory for systematically studying the influence law of the overlapping area on the thrust of multi-rotors. Moreover, the existing rotor thrust measurement devices have relatively single test functions and cannot obtain the performance of the rotor corresponding to different working environments, which causes many troubles in the systematic research of the rotor. Summary of the Invention

[0003] The object of the present invention is to solve the above technical problems and provide a multifunctional rotor thrust test device with diverse test functions and a wide range of research parameters. It can study the rotor thrust of a single rotor alone, or study the thrust and aerodynamic interference of upper and lower dual rotors or multi-rotors. It can not only change the rotor type to study the influence of airfoil parameters on the rotor thrust, adjust the rotor radius to study the influence of radius parameters on the rotor thrust, but also change the rotational speed of the driving motor to study the influence of rotational speed parameters on the rotor thrust. The most crucial thing is that it can study the influence of different overlapping areas of the upper and lower rotors on the thrust of the upper and lower multi-wing rotors.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention discloses a multifunctional rotor thrust test device, including a plurality of test platforms capable of revolving coaxially and a locking member capable of locking the test platforms on their rotation paths. The plurality of test platforms are arranged at intervals in the vertical direction. A test pull rod and a tension sensor are provided on the test platform. The axis of the test pull rod intersects the axis of revolution of the test platform. The test pull rod includes a hinged end vertically hinged on the test platform and a suspended end extending out of the test platform. An installation base for vertically installing a driving motor with a self - contained rotor is provided on the suspended end. The tension sensor is located between the hinged end and the suspended end. One of the tension - receiving ends of the tension sensor is fixedly connected to the test platform, and the other tension - receiving end of the tension sensor is hinged with a connecting rod for hinging with the test pull rod.

[0005] Preferably, it includes a main body support. The main body support includes a plurality of vertical guide rails. An installation platform is slidably connected to the vertical guide rails. The installation platform is locked on the vertical guide rails through a self - locking member. One end of the test platform is horizontally hinged on the installation platform, and the other end of the test platform is slidably connected to the installation platform through a guide rail mechanism.

[0006] Preferably, the self - locking member includes a tightening and loosening clamping plate for clamping on the vertical guide rail. T - shaped chutes are provided on both of the two surfaces of the vertical guide rail clamped by the tightening and loosening clamping plate. A locking through - hole is provided on the tightening and loosening clamping plate. The head of a locking bolt is slidably connected in the T - shaped chute, and the screw of the locking bolt extends out of the T - shaped chute and is locked in the locking through - hole through a locking nut.

[0007] Preferably, the guide rail mechanism includes an arc - shaped guide rail and an arc - shaped slider fixedly connected to the installation platform. The arc - shaped slider is slidably connected to the arc - shaped guide rail.

[0008] Preferably, the guide rail mechanism includes a first slide rail fixedly connected to the installation platform and a second slide rail intersecting the first slide rail. A first slider is slidably connected to the first slide rail. The top of the first slider is rotatably connected to a second slider slidably connected to the second slide rail. The test platform is fixedly connected to the second slide rail. The axis of the test pull rod is in the same extending direction as the second slide rail.

[0009] Preferably, the locking member includes a locking slider slidably connected to the first slide rail and adjustment screw holes sequentially arranged on the first slide rail along the length direction of the first slide rail. The locking slider is fixedly connected to the first slider. A locking through - hole for bolt - connecting with the adjustment screw holes is provided on the locking slider.

[0010] Preferably, the installation platform is a triangular platform. The three corners of the triangular platform are respectively clamped on the three vertical guide rails by the tightening splints. The first slide rail is arranged parallel to a straight side of the triangular platform. The main body bracket includes a square frame base composed of aluminum profiles. The three vertical guide rails are respectively fixed on the three corners of the square frame base. The two aluminum profiles in the square frame base that are far from the vertical guide rails extend in the direction away from the suspended end to form anti-overturning support sections.

[0011] Preferably, the installation base includes an upper seat and a lower seat that are buckled with each other. Buckling grooves for buckling on the test pull rod are provided on the buckling surfaces of the upper seat and the lower seat. Locking through holes for bolt connection are correspondingly provided on the upper seat and the lower seat. A safety area for motor installation is provided on the upper seat.

[0012] Preferably, the test pull rod includes a first hollow rod section for installing the installation base and a second hollow rod section for being hinged on the test platform. The first hollow rod section is slidably sleeved in the second hollow rod section. The first hollow rod section and the second hollow rod section are fixed by a locking pipe clamp.

[0013] Preferably, a hinge seat is provided at one end of the test platform hinged to the installation platform. A rotating pipe clamp fixedly connected to the second hollow rod section is rotatably connected to the hinge seat.

[0014] The present invention has achieved the following technical effects compared with the prior art:

[0015] 1. In the multifunctional rotor thrust test device disclosed by the present invention, the test functions are diverse and the research parameter range is wide. It is possible to use only one test pull rod to separately study the rotor thrust under a single rotor, or to use multiple test pull rods to study the thrust and aerodynamic interference under upper and lower double rotors or multiple rotors. When it is a single rotor, by changing the rotor type, the influence of airfoil parameters on the rotor thrust can be studied. By adjusting the rotor radius, the influence of radius parameters on the rotor thrust can be studied. By changing the rotational speed of the driving motor, the influence of rotational speed parameters on the rotor thrust can be studied. When it is a double rotor or multiple rotors, by rotating the test platform to drive the test pull rod above it to swing, the overlapping area of adjacent upper and lower rotors can be changed, and the influence of different overlapping areas of upper and lower multi-wing rotors on the thrust of upper and lower multi-wing rotors can be studied.

[0016] 2. In the present invention, by changing the distance between the installation platforms, the distance between the upper and lower rotors can be adjusted to study the influence of the parameter distance on the rotor thrust.

[0017] 3. In the present invention, by adjusting the position of the rotor on the test pull rod, the length of the force arm can be changed. By changing the length of the force arm, the test value of the tension sensor can be amplified, thereby improving the measurement accuracy. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a multi-functional rotor thrust test device;

[0020] Figure 2 It is a top three-dimensional structural schematic diagram at the installation platform;

[0021] Figure 3 It is a rear three-dimensional structural schematic diagram at the installation platform;

[0022] Figure 4 It is a bottom three-dimensional structural schematic diagram at the installation platform;

[0023] Figure 5 It is a schematic diagram of the connection relationship between the installation platform and the vertical guide rail;

[0024] Figure 6 It is a partial enlarged view of the test pull rod;

[0025] Figure 7 It is a three-dimensional structural schematic diagram at the rotor;

[0026] Figure 8 It is a formula diagram for the moment balance of the test pull rod.

[0027] Explanation of reference numerals: 1, main body bracket; 2, installation platform; 3, first slide rail; 4, second slide rail; 5, first slider; 6, second slider; 7, test platform; 8, test pull rod; 9, tension sensor; 10, connecting rod; 11, installation base; 12, rotor; 13, drive motor; 14, vertical guide rail; 15, T-shaped chute; 16, square frame base; 17, anti-rollover support section; 18, tightening clamp; 19, locking bolt; 20, locking nut; 21, support column; 22, first bearing; 23, adjustment screw hole; 24, locking slider; 25, locking through hole; 26, first hollow rod section; 27, second hollow rod section; 28, locking pipe clamp; 29, hinge seat; 30, rotating pipe clamp; 31, second bearing; 32, upper seat; 33, lower seat; 34, locking through hole; 35, connecting pipe clamp; 36, third bearing. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] This embodiment provides a multifunctional rotor thrust test device, as Figures 1 to 8 shown, which includes a locking member and a plurality of test platforms 7 arranged at intervals in the vertical direction. The plurality of test platforms 7 can revolve around the same axis, and the locking member can lock the test platform 7 at a certain position on its rotation path. The number of test platforms 7 is at least two. Considering that in current multi-rotor UAVs in the market, generally two rows of rotors are arranged staggeredly, or two rotors are coaxial, the number of test platforms 7 is often set to two. A test pull rod 8 and a tension sensor 9 are arranged on each test platform 7, and the axis of the test pull rod 8 intersects with the revolution axis of the test platform 7. The test pull rod 8 includes a hinged end and a suspended end extending out of the test platform 7. The hinged end is vertically hinged on the test platform 7, and an installation base 11 is provided on the suspended end. A driving motor 13 with a self-contained rotor 12 can be installed through the installation base 11. When installed, the driving motor 13 is vertically installed, that is, the rotating shaft of the driving motor 13 is vertically arranged. Preferably, the driving motor 13 can be detachably installed on the installation base 11 by means of interference plugging or bolt connection. When it is necessary to view the rotors 12 with different diameters from the side, the driving motor 13 with a different diameter can be directly replaced. The tension sensor 9 is located between the hinged end and the suspended end. One of the tension-receiving ends of the tension sensor 9 is fixedly connected to the test platform 7, and the other tension-receiving end of the tension sensor 9 is hinged with a connecting rod 10, and the connecting rod 10 is hinged with the test pull rod 8. Preferably, a connecting pipe clamp 35 is arranged on the test pull rod 8, and the connecting pipe clamp 35 is hinged with the connecting rod 10.

[0030] Working principle:

[0031] ① Simulate single-rotor thrust measurement

[0032] First, rotate the test platform 7 to a suitable position and lock it with a locking member. Then, vertically install the drive motor 13 of the self - carried rotor 12 on the mounting base 11. Start the drive motor 13. At this time, the rotor 12 rotates at a certain speed, giving an upward pulling force to the test pull rod 8. After the pulling force sensor 9 receives this part of the pulling force, it transmits the signal to the control system, records the pulling force value at this time, and uses this as a reference value. Finally, by replacing the drive motor 13 of the rotor 12 with different radii but the same airfoil and testing at the same rotational speed, the pulling force values under different - radius rotors 12 can be obtained and compared with the reference value. Or by replacing the drive motor 13 of the rotor 12 with different airfoils but the same radius and testing at the same rotational speed, the pulling force values under different - airfoil rotors 12 can be obtained and compared with the reference value. Or by changing the driving speed of the drive motor 13 to test the pulling force values of the rotor 12 with the same radius and the same airfoil at different rotational speeds and compare them with the reference value.

[0033] ② Simulate the measurement of the staggered pulling force of multi - rotors

[0034] Here, taking two rotors staggered up and down as an example, the working principle of more than two is the same.

[0035] First, vertically install the drive motors 13 of the rotors 12 with the same radius and airfoil on the upper and lower two mounting bases 11. Then, rotate the upper and lower two test platforms 7 respectively to completely stagger the rotors 12 on the upper and lower two test pull rods 8 without any intersection, and lock the test platform 7 with a locking member. Then, start the two drive motors 13 simultaneously and rotate at the same speed. After the upper and lower two pulling force sensors 9 receive the pulling force, they transmit the signal to the control system, record the pulling force values generated by the two rotors 12 respectively at this time, and use this as a reference value. Then, unlock the locking member, and rotate the upper and lower two test platforms 7 again to make the rotors 12 on the upper and lower two test pull rods 8 intersect with each other, that is, there is a partial intersection in the vertical projection, lock the test platform 7 with the locking member again, start the two drive motors 13 simultaneously, rotate at the same speed as before, and record the pulling force values generated by the two rotors 12 respectively at this time. Finally, repeat the above steps, continuously adjust the intersection area of the rotors 12 until they completely overlap, measure the pulling force values generated by the two rotors 12 respectively under different intersection areas, and compare them with the reference value.

[0036] In addition to the above basic tests, under the same intersection area, the rotational speed can be changed to test the influence of the pulling force on each other at different rotational speeds. It is also possible to make the rotational speeds of the upper and lower rotors 12 different to test the mutual influence between them at different rotational speeds. Or for different airfoils 12, or different radii, the mutual influence between them, etc. There is no need to elaborate here too much, and appropriate changes can be made according to the above principles.

[0037] ③ Simulation of the pull force measurement of coaxial dual rotors

[0038] As long as the upper and lower rotors 12 are completely overlapped, the remaining details can refer to the process of simulating the pull force measurement of multi-rotors with staggered upper and lower positions in ②. For example, the rotational speeds of the two rotors 12 can be changed synchronously, the airfoils and radii of the two rotors 12 can be changed synchronously, or the two rotors 12 can have different rotational speeds, different airfoils and radii. There is no need to elaborate here too much.

[0039] In order to simulate the change of pull force caused by different spacing factors of coaxial dual rotors, in this embodiment, as Figures 1 to 8 shown, it includes a main body bracket 1. The main body bracket 1 includes several vertical guide rails 14. An installation platform 2 is slidably connected to the vertical guide rails 14. The installation platform 2 is locked on the vertical guide rails 14 through a self-locking member. One end of the test platform 7 is horizontally hinged to the installation platform 2, and the other end of the test platform 7 is slidably connected to the installation platform 2 through a guide rail mechanism. Preferably, a support column 21 is provided on the installation platform 2, and a first bearing 22 is provided on the support column 21. The test platform 7 is rotatably connected to the support column 21 through the first bearing 22. The setting of the support column 21 can ensure that both ends of the test platform 7 are flush, so as to keep the test platform 7 in a horizontal state. The installation platform 2 slides up and down along the vertical guide rails 14, so as to be able to change the spacing between two adjacent installation platforms 2 to test the mutual influence of the pull force values between the upper and lower rotors 12 at different spacings.

[0040] ④ Pull force measurement of coaxial dual rotors at different spacings

[0041] First, vertically install the drive motors 13 of the rotors 12 with the same radius and airfoil on the upper and lower mounting bases 11; then, rotate the upper and lower test platforms 7 respectively to make the rotors 12 on the upper and lower test pull rods 8 completely overlap, that is, the vertical projections completely overlap, and lock the test platform 7 with a locking member; then, unlock the installation platform 2, increase the distance between the upper and lower installation platforms 2 to ensure that they do not affect each other at all, start the two drive motors 13 and rotate at the same speed. After the upper and lower pull force sensors 9 receive the pull force, they transmit the signals to the control system, and record the pull force values generated by the two rotors 12 respectively at this time, and use this as a reference value; then, unlock the installation platform 2, reduce the distance between the upper and lower installation platforms 2, start the two drive motors 13 again and rotate at the same speed as before, and record the pull force values generated by the two rotors 12 respectively at this time; finally, repeat the above steps, continuously reduce the distance between the upper and lower installation platforms 2, measure the pull force values generated by the two rotors 12 respectively at different spacings, and compare them with the reference value.

[0042] Furthermore, in this embodiment, as Figures 1 to 8As shown in the figure, the self-locking member includes a clamping plate 18 for clamping on the vertical guide rail 14. T-shaped sliding grooves 15 are provided on both surfaces of the vertical guide rail 14 clamped by the clamping plate 18. A locking through hole is provided on the clamping plate 18. The head of the locking bolt 19 is slidably connected in the T-shaped sliding groove 15. After the screw rod of the locking bolt 19 extends out of the T-shaped sliding groove 15 and passes through the locking through hole, it is locked on the clamping plate 18 with a locking nut 20. By loosening the locking nut 20, the clamping force of the clamping plate 18 on the vertical guide rail 14 becomes loose, and the installation platform 2 can move up and down. When the locking nut 20 is tightened again, the clamping force of the clamping plate 18 on the vertical guide rail 14 can be increased to fix the installation platform 2. Preferably, the vertical guide rail 14 can be directly made of 4040 European standard aluminum profile, and T-shaped sliding grooves 15 are provided on all four surfaces of the 4040 European standard aluminum profile, saving the process of machining the T-shaped sliding grooves 15.

[0043] In this embodiment, a first guide rail mechanism is proposed, which includes an arc guide rail and an arc slider. The arc guide rail is fixedly connected to the installation platform 2, and the arc slider is slidably connected to the arc guide rail. The test platform 7 is fixed on the top of the arc slider. When the test platform 7 is moved, the test platform 7 will rotate around its hinge point with the installation platform 2, and the arc guide rail and the arc slider can guide its rotation. By locking the arc slider on the arc guide rail with a locking member, the locking of the test platform 7 can be completed.

[0044] In this embodiment, a second guide rail mechanism is proposed, as Figures 1 to 8 shown, which includes a first slide rail 3 and a second slide rail 4. The first slide rail 3 is fixedly connected to the installation platform 2, and a first slider 5 is slidably connected to the first slide rail 3. The top of the first slider 5 is rotatably connected to a second slider 6. Preferably, the first slider 5 and the second slider 6 can be rotatably connected through a third bearing 36. The top of the second slider 6 is slidably connected to the second slide rail 4. The second slide rail 4 intersects with the first slide rail 3, and the test platform 7 is fixedly connected to the second slide rail 4. The axis of the test pull rod 8 is the same as the extending direction of the second slide rail 4. Its movement principle is as follows: when the test platform 7 rotates around its hinge point with the installation platform 2, the first slider 5 will translate on the first slide rail 3, the second slide rail 4 will translate on the second slider 6, and at the same time, rotation will occur between the second slider 6 and the first slider 5, so as to guide the rotation of the test platform 7.

[0045] Furthermore, in this embodiment, as Figures 1 to 8As shown in the figure, the locking member includes a locking slider 24 and a plurality of adjusting screw holes 23 provided on the first slide rail 3. The plurality of adjusting screw holes 23 are arranged in sequence along the length direction of the first slide rail 3. The locking slider 24 is slidably connected to the first slide rail 3, and the locking slider 24 is fixedly connected to the first slider 5. A locking through hole 25 is provided on the locking slider 24. After moving the locking slider 24 so that the locking through hole 25 corresponds to a certain adjusting screw hole 23, a bolt is screwed into the locking through hole 25 and the adjusting screw hole 23, and the locking of the locking slider 24 at a certain position on the first slide rail 3 can be completed, so as to realize the locking of the first slider 5, and finally realize the locking of the test platform 7 on its rotation path.

[0046] Furthermore, in this embodiment, as Figures 1 to 8 shown, the installation platform 2 is a triangular platform. The three corners of the triangular platform are respectively clamped on the three vertical guide rails 14 through the tightening and loosening clamping plates 18, that is, each corner is provided with a tightening and loosening clamping plate 18, and then the three vertical guide rails 14 are also arranged in a triangular shape. The main body bracket 1 includes a square frame base 16 composed of aluminum profiles. The three vertical guide rails 14 are respectively fixed at the three corners of the square frame base 16. The two aluminum profiles in the square frame base 16 that are far from the vertical guide rails 14 extend in the direction away from the suspended end to form an anti-overturning support section 17. The orientation of the anti-overturning support section 17 is opposite to the extension direction of the test pull rod 8. This is because when the rotor 12 provides an upward lifting force, it will cause the entire main body bracket 1 to tilt in the direction of the orientation of the anti-overturning support section 17, and the existence of the anti-overturning support section 17 can prevent the main body bracket 1 from tilting in this direction.

[0047] Preferably, the aluminum profile for making the square frame base 16 is 4040 European standard aluminum profile. During manufacturing, two long-sized 4040 European standard aluminum profiles are connected to form an L-shaped bracket through 4040 profile connecting angle pieces, and are fixed by using m8 T-shaped bolts and m8 flange anti-slip nuts. Then, two short-sized 4040 European standard aluminum profiles are fixed inside the L-shaped bracket by using m8 T-shaped bolts and m8 flange anti-slip nuts. The frame structure surrounded by the two short-sized 4040 European standard aluminum profiles and the two long-sized 4040 European standard aluminum profiles forms the square frame base 16, and the two sections extended from the two long-sized 4040 European standard aluminum profiles form the anti-overturning support section 17.

[0048] Preferably, the installation platform 2 can be composed of a main body bottom plate and support steel bars. First, two 0.5m long support steel bars are used to form two sides of a triangle, and then the triangular main body bottom plate is placed corresponding to the two support steel bars and fixed by using m8 T-shaped bolts and m8 flange anti-slip nuts. Then, the tightening and loosening clamping plates 18 are fixed on the two support steel bars by using m8 T-shaped bolts and m8 flange anti-slip nuts. The tightening and loosening clamping plates 18 are made of carbon fiber reinforced plates.

[0049] To improve the measurement accuracy of the pulling force of the rotor 12, it is necessary to adjust the position of the rotor 12 on the test pull rod 8, and then change the length of the force arm to improve the measurement accuracy. For this reason, in this embodiment, as Figures 1 to 8 shown, the mounting base 11 includes an upper seat 32 and a lower seat 33 that are buckled together. The upper seat 32 is provided with a mounting area for installing the drive motor 13. Buckling grooves are provided on the buckling surfaces of the upper seat 32 and the lower seat 33. Through the buckling grooves, the upper seat 32 and the lower seat 33 are respectively buckled on the top surface and the bottom surface of the rod wall of the test pull rod 8. Locking through holes 34 for bolt connection are correspondingly provided on the upper seat 32 and the lower seat 33. After removing the bolts, the upper seat 32 and the lower seat 33 can be separated. Then, by changing the buckling positions of the upper seat 32 and the lower seat 33 on the test pull rod 8 and re-locking, the position of the mounting base 11 on the test pull rod 8 can be changed, and then the position of the rotor 12 can be changed, changing the torque, so as to improve the measurement accuracy. The specific principle is based on the formula of moment balance. When the moment is balanced and taking the moment about point O, there is: F1L1 = F2L2, that is, F2 = F1L1 / L2. Therefore, we can adjust the length of L1 to magnify F2, and thus improve the measurement accuracy. Point O is the hinge point of the test pull rod 8 and the test platform 7, L2 is the length from point O to the tension sensor 9, L1 is the length of the test pull rod 8, F2 is the tension measured by the tension sensor 9, and F1 is the lifting force provided by the rotor 12, as Figure 8 shown.

[0050] Preferably, the mounting area is provided with motor mounting holes for bolt connection of the drive motor 13. The drive motor 13 can be externally powered or self-powered. When externally powered, it can be powered by wiring or by battery. A battery slot can be provided on the upper seat 32 in advance for placing the battery and connecting to the drive motor 13. At this time, it can be set according to the actual situation using the existing method, and no more details will be described here.

[0051] In this embodiment, as Figures 1 to 8 shown, the test pull rod 8 includes a first hollow rod section 26 and a second hollow rod section 27. The first hollow rod section 26 is slidably sleeved inside the second hollow rod section 27, and the first hollow rod section 26 and the second hollow rod section 27 are fixed by a locking pipe clamp 28. The locking pipe clamp 28 is two clip pieces with grooves, and through holes for bolt connection are provided on the clip pieces. By loosening the locking pipe clamp 28, the sleeved length of the first hollow rod section 26 and the second hollow rod section 27 can be changed, thereby changing the length of the test pull rod 8. The mounting base 11 is mounted on the first hollow rod section 26. The second hollow rod section 27 is hinged to the test platform 7. Preferably, the first hollow rod section 26 and the second hollow rod section 27 can be made of carbon fiber tubes, which have strong quality and high strength.

[0052] In this embodiment, as Figures 1 to 8As shown in the figure, a hinge seat 29 is provided at one end of the test platform 7 hinged to the installation platform 2. A rotating pipe clamp 30 is rotatably connected to the hinge seat 29 and is inside the rotating pipe clamp 30 fixedly connected to the second hollow rod section 27. Preferably, the hinge seat 29 includes two legs, and a second bearing 31 is provided on each leg. The rotating pipe clamp 30 is fixed to the inner ring of the second bearing 31.

[0053] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A multi-functional rotor thrust test device, characterized in that, It includes a number of test platforms capable of revolving coaxially and a locking member capable of locking the test platforms on their rotation paths. The several test platforms are arranged at intervals in the vertical direction. A test pull rod and a tension sensor are provided on the test platforms. The axis of the test pull rod intersects with the revolution axis of the test platforms. The test pull rod includes a hinged end vertically hinged on the test platform and a suspended end extending out of the test platform. An installation base for vertically installing a driving motor with a self - carried rotor is provided on the suspended end. The tension sensor is located between the hinged end and the suspended end. One of the tension - receiving ends of the tension sensor is fixedly connected to the test platform, and the other tension - receiving end of the tension sensor is hinged with a connecting rod for hinging with the test pull rod.

2. The multi-functional rotor thrust test device according to claim 1, characterized in that, It includes a main body support. The main body support includes a number of vertical guide rails. An installation platform is slidably connected to the vertical guide rails. The installation platform is locked on the vertical guide rails by a self - locking member. One end of the test platform is horizontally hinged to the installation platform, and the other end of the test platform is slidably connected to the installation platform through a guide rail mechanism.

3. The multi-functional rotor thrust test device according to claim 2, characterized in that, The self - locking member includes a tightening and loosening clamping plate for clamping on the vertical guide rail. T - shaped chutes are provided on both of the two surfaces of the vertical guide rail clamped by the tightening and loosening clamping plate. A locking through - hole is provided on the tightening and loosening clamping plate. The head of a locking bolt is slidably connected in the T - shaped chute. The screw of the locking bolt extends out of the T - shaped chute and is locked in the locking through - hole through a locking nut.

4. The multi-functional rotor thrust test device according to claim 3, characterized in that, The guide rail mechanism includes an arc - shaped guide rail and an arc - shaped slider fixedly connected to the installation platform. The arc - shaped slider is slidably connected to the arc - shaped guide rail.

5. The multi-functional rotor thrust test device according to claim 3, characterized in that, The guide rail mechanism includes a first slide rail fixedly connected to the installation platform and a second slide rail intersecting with the first slide rail. A first slider is slidably connected to the first slide rail. The top of the first slider is rotatably connected to a second slider slidably connected to the second slide rail. The test platform is fixedly connected to the second slide rail. The axis of the test pull rod is in the same direction as the extending direction of the second slide rail.

6. The multi-functional rotor thrust test device according to claim 5, characterized in that, The locking member includes a locking slider slidably connected to the first slide rail and adjusting screw holes sequentially arranged on the first slide rail along the length direction of the first slide rail. The locking slider is fixedly connected to the first slider. A locking through - hole for bolt - connecting with the adjusting screw hole is provided on the locking slider.

7. The multi-functional rotor thrust test device according to claim 6, characterized in that, The installation platform is a triangular platform. The three corners of the triangular platform are respectively clamped on the three vertical guide rails through the tightening and loosening clamping plates. The first slide rail is arranged parallel to a certain straight side of the triangular platform. The main body support includes a square frame base composed of aluminum profiles. The three vertical guide rails are respectively fixed at the three corners of the square frame base. The two aluminum profiles in the square frame base far from the vertical guide rails extend in the direction away from the suspended end to form anti - rollover support sections.

8. The multi-functional rotor thrust test device according to claim 1, characterized in that, The installation base includes an upper seat and a lower seat that are snap-fitted to each other. Snap-fitting grooves for snapping onto the test pull rod are provided on the snap-fitting surfaces of the upper seat and the lower seat. Locking through holes for bolt connection are correspondingly provided on the upper seat and the lower seat. A safety area for motor installation is provided on the upper seat.

9. The multi-functional rotor thrust test device according to claim 2, characterized in that, The test pull rod includes a first hollow rod section for installing the installation base and a second hollow rod section for being hinged to the test platform. The first hollow rod section is slidably sleeved inside the second hollow rod section, and the first hollow rod section and the second hollow rod section are fixed by a locking pipe clamp.

10. The multi-functional rotor thrust test device according to claim 9, characterized in that, A hinge seat is provided at one end of the test platform that is hinged to the installation platform. A rotating pipe clamp fixedly connected to the second hollow rod section is rotatably connected to the hinge seat.

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