A balancing device for hovering of surveying and mapping UAV

Abstract

The present invention relates to the technical field of hovering of unmanned aerial vehicles, and in particular to a balancing device for hovering of a surveying and mapping unmanned aerial vehicle, wherein the balancing device for hovering of the surveying and mapping unmanned aerial vehicle comprises: a balancing fixed seat, a balancing fixed block, a balancing movable block, a sliding guide rod, a balancing groove, a fixing rod and a metal ball; the beneficial effects are: by adjusting the inclination angle of the metal ball contacting a second winding electrode sheet or a second unwinding electrode sheet, the balancing angle of the surveying and mapping unmanned aerial vehicle when hovering is adjusted, so as to prevent the unmanned aerial vehicle from being unable to hover and causing bumps, and in response to strong winds, ascending and descending air currents and other severe weather conditions, the unmanned aerial vehicle is prevented from being pulled and shaken by a load, so as to facilitate the control of its own stability, effectively reduce the crash probability of the unmanned aerial vehicle, and reduce the installation time of adjusting the counterweight load, and can accurately adjust the counterweight, thereby reducing the burden on the existing flight control system.

Description

Technical Field

[0001] The invention relates to the technical field of hovering unmanned aerial vehicles, and in particular to a hovering balancing device for a surveying and mapping unmanned aerial vehicle. Background Art

[0002] With the rapid development and popularization of drone technology, the application scenarios are constantly expanding, and it is widely used in aerial photography, agricultural plant protection, national defense security, etc. At the same time, the upper limit of the load that drones can currently bear is constantly increasing. As a platform for specific tools, it often faces changes in load size, weight, and shape. When a drone is equipped with a gimbal camera, the rotation of the camera causes the center of gravity to shift.

[0003] The weight distribution of existing drones is often symmetrical, but the weight distribution of the load is always asymmetrical, which makes the center of gravity of the drone deviate from the position of the rotor lift, and then makes the drone tilted, making it impossible for the drone to hover and causing turbulence; at the same time, an overweight and asymmetrical load can easily cause the drone to lose stability in flight. The asymmetrical load causes the drone to be pulled and shaken by the load when dealing with strong winds, updrafts and downdrafts and other severe weather. Even when facing some disturbances, due to the irregular weight distribution of the load, the drone is more difficult to control its own stability and is very likely to overturn and crash. Existing drones often temporarily adjust the installation position of the counterweight load before takeoff, which is time-consuming and not accurate enough; or rely on the flight control system to adjust the propeller rotation for balance, so as to avoid the drone from losing stability and rotating, which increases the burden of the existing flight control system. Summary of the invention

[0004] The purpose of the present invention is to provide a balancing device for hovering a surveying and mapping UAV to solve the problem of asymmetric weight distribution of the UAV load.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A balancing device for hovering a surveying and mapping unmanned aerial vehicle, the balancing device for hovering a surveying and mapping unmanned aerial vehicle comprising:

[0007] The balance mount is fixed in the center of the surveying and mapping drone;

[0008] The balancing fixing blocks are provided in two groups and fixed at both ends of the side surface of the balancing fixing seat;

[0009] The balancing movable block is arranged outside the balancing fixed seat and is located between the two sets of balancing fixed blocks;

[0010] The sliding guide rod is arranged between the two groups of balancing fixed blocks, both ends of which are connected to the balancing fixed blocks and arranged in parallel with the balancing fixed seats, and multiple groups of sliding guide rods are arranged, and the multiple groups of sliding guide rods pass through the balancing movable blocks;

[0011] A balance groove is provided in the middle of the surface of the balance fixing base close to the balance fixing block;

[0012] A fixing rod is fixed in the middle of the innermost surface of the balance groove and is horizontally arranged; and

[0013] A metal ball is arranged inside the balance groove.

[0014] Preferably, a limiting plate is arranged on the surface of one end of the fixing rod close to the balance movable block. There are two groups of limiting plates. A rotating ring is arranged between the two groups of limiting plates. The rotating ring is sleeved on the surface of the fixing rod and is rotatably connected to the fixing rod. Two balance connecting rods are connected to the side surface of the rotating ring. The included angle between the two balance connecting rods is 180 degrees. One end of the balance connecting rod far from the rotating ring is connected to a metal ball.

[0015] Preferably, a second winding electrode sheet and a second unwinding electrode sheet are arranged on the right side inside the balance groove, and a first winding electrode sheet and a first unwinding motor sheet are arranged on the left side inside the balance groove. The second winding electrode sheet, the second unwinding electrode sheet, the first winding electrode sheet, and the first unwinding motor sheet are all arranged parallel to the fixing rod. The first winding electrode sheet and the second winding electrode sheet are at the same height and are located above the metal ball. The first unwinding motor sheet and the second unwinding electrode sheet are at the same height and are located below the metal ball.

[0016] Preferably, adjusting movable grooves are provided on both side surfaces of the balance groove. The cross-section of the adjusting movable groove is in a "C" shape structure. An adjusting rotating shaft is arranged inside the adjusting movable groove. The bottom end of the adjusting rotating shaft is rotatably connected to the adjusting movable groove, and the top end of the adjusting rotating shaft is connected to a synchronous pulley. The top end of the synchronous pulley is connected to a rotating shaft.

[0017] Preferably, one group of rotating shafts close to the first winding electrode sheet is rotatably connected to the adjusting movable groove. The top end of the other group of rotating shafts is connected to an adjusting motor. A synchronous belt is arranged outside the two groups of synchronous pulleys. The synchronous belt cooperates with the synchronous pulleys to drive the two groups of adjusting rotating shafts to rotate synchronously.

[0018] Preferably, a movable limiting block is sleeved on the middle surface of the adjusting rotating shaft, and a first movable block and a second movable block are sleeved on the outer surface of the adjusting rotating shaft. The second movable block is located above the movable limiting block, and the first movable block is located below the movable limiting block. One group of second movable blocks is connected to the first winding electrode sheet, and the other group of second movable blocks is connected to the second winding electrode sheet. One group of first movable blocks is connected to the first unwinding motor sheet, and the other group of first movable blocks is connected to the second unwinding electrode sheet.

[0019] Preferably, the adjusting shaft is located on one side of the second movable block and has a right-handed external thread on its surface, the second movable block has a right-handed internal thread on its inner wall, and the adjusting shaft matches the thread of the second movable block; the adjusting shaft is located on one side of the first movable block and has a left-handed external thread on its surface, the first movable block has a left-handed internal thread on its inner wall, and the adjusting shaft matches the thread of the first movable block.

[0020] Preferably, a limiting groove is provided on the surface of the adjusting movable groove away from the fixed rod, and the first movable block and the second movable block are connected to a limiting slider on the surface of the side away from the fixed rod, the limiting slider is located inside the limiting groove, and the cross-sections of the limiting slider and the limiting groove are both in a "T" shape, and the limiting groove and the limiting slider cooperate to limit the axial position of the second movable block and the first movable block.

[0021] Preferably, a first drive motor is arranged inside a group of balancing fixed blocks close to the first winding electrode sheet, one end of the first drive motor is fixed inside the balancing fixed block, and the other end is connected to the adjusting cylinder, and a first traction rope is sleeved on the outside of the adjusting cylinder, and the other end of the first traction rope passes through the balancing fixed block and is connected to the balancing movable block, and a touch switch is arranged on the surface of the first winding electrode sheet and the first unwinding motor sheet, and the touch switch controls the forward or reverse rotation of the first drive motor.

[0022] Preferably, a second drive motor is arranged inside a group of balancing fixed blocks close to the fixed rod, one end of the second drive motor is fixed inside the balancing fixed block, and the other end is connected to the adjusting cylinder, and a second traction rope is sleeved on the outside of the adjusting cylinder, and the other end of the second traction rope passes through the balancing fixed block and is connected to the balancing movable block, and touch switches are arranged on the surfaces of the second winding electrode sheet and the second unwinding electrode sheet, and the touch switches control the forward or reverse rotation of the second drive motor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] When the surveying and mapping UAV is in a horizontal state, the metal ball is horizontal with the balancing connecting rod, and the metal ball is between the second winding electrode sheet and the second unwinding electrode sheet and the first winding electrode sheet and the first unwinding motor sheet. When the surveying and mapping UAV tilts to the left, the two groups of metal balls contact the second winding electrode sheet and the first unwinding motor sheet respectively, thereby starting the second driving motor through the second winding electrode sheet, so that the second driving motor drives the adjusting cylinder to wind up the second traction rope, and starting the first driving motor through the first unwinding motor sheet, so that the first driving motor drives the adjusting cylinder to unwind the first traction rope, thereby pulling the balancing movable block to the right, and guiding and limiting the balancing movable block through the sliding guide rod, thereby balancing the surveying and mapping UAV. When the surveying and mapping UAV is in balance, the metal ball is separated from the second winding electrode sheet and the first unwinding motor sheet, and the balancing movable block stops moving. Otherwise, the metal ball touches the first winding electrode sheet and the second unwinding electrode sheet to drive the balancing movable block to move to the left, thereby balancing the surveying and mapping UAV, thereby ensuring the stability of the surveying and mapping UAV when hovering, and ensuring the symmetry of the UAV load weight distribution.

[0025] By starting the adjusting motor to drive a group of synchronous wheels to rotate, and by the cooperation of the synchronous belt and the synchronous wheel to drive the two groups of adjusting shafts to rotate, the second movable block and the first movable block are driven to move synchronously closer or farther away, thereby adjusting the distance between the first winding electrode sheet and the first unwinding motor sheet and the second winding electrode sheet and the second unwinding electrode sheet, thereby adjusting the inclination angle of the metal ball contacting the second winding electrode sheet or the second unwinding electrode sheet, thereby adjusting the balance angle of the surveying and mapping UAV when hovering, preventing the UAV from being unable to hover and causing bumps, and preventing it from being pulled and shaken by the load when dealing with strong winds, up and down air currents and other severe weather, thereby facilitating the control of its own stability, effectively reducing the probability of the UAV crashing, and reducing the installation time for adjusting the counterweight load, being able to accurately adjust the counterweight, and reducing the burden on the existing flight control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of a cutaway three-dimensional structure of the present invention;

[0028] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0029] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the metal ball and the fixing rod.

[0031] In the figure: a balancing fixed seat 1, a balancing fixed block 2, a first traction rope 3, a sliding guide rod 4, a balancing movable block 5, a second traction rope 6, a balancing groove 7, a second winding electrode sheet 8, a second unwinding electrode sheet 9, a metal ball 10, a first winding electrode sheet 11, a first unwinding motor sheet 12, a first driving motor 13, an adjusting cylinder 14, a second driving motor 15, a balancing connecting rod 16, an adjusting movable groove 17, a fixing rod 18, a swivel 19, a limiting plate 20, a first movable block 21, a movable limiting block 22, a second movable block 23, a limiting slide groove 24, a synchronous wheel 25, a rotating shaft 26, an adjusting motor 27, a synchronous belt 28, a limiting slider 29, and an adjusting rotating shaft 30. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 5 , the present invention provides a technical solution:

[0034] A balancing device for hovering a surveying and mapping UAV, comprising: a balancing fixed seat 1, fixed in the center of the surveying and mapping UAV; two groups of balancing fixed blocks 2, fixed at both ends of the side surface of the balancing fixed seat 1; a balancing movable block 5, arranged outside the balancing fixed seat 1, and located between the two groups of balancing fixed blocks 2; a sliding guide rod 4, arranged between the two groups of balancing fixed blocks 2, both ends of which are connected to the balancing fixed blocks 2, and arranged parallel to the balancing fixed seat 1, and multiple groups are arranged, and multiple groups of sliding guide rods 4 are arranged through the balancing movable block 5; a balancing groove 7, opened on the balancing fixed seat 1 near the balancing fixed block 2 One side surface is centered; a fixed rod 18, fixed in the center of the innermost surface of the balancing groove 7 and arranged horizontally; and a metal ball 10, arranged inside the balancing groove 7; a limit plate 20 is arranged on the surface of one end of the fixed rod 18 close to the balancing movable block 5, and two groups of limit plates 20 are arranged, and a swivel 19 is arranged between the two groups of limit plates 20, the swivel 19 is sleeved on the surface of the fixed rod 18 and is rotatably connected to the fixed rod 18, and two groups of balancing connecting rods 16 are connected to the side surface of the swivel 19, the angle between the two groups of balancing connecting rods 16 is one hundred and eighty degrees, and the metal ball 10 is connected to the end of the balancing connecting rod 16 away from the swivel 19.

[0035] The present invention can be further configured such that a second winding electrode sheet 8 and a second unwinding electrode sheet 9 are provided on the right side inside the balance groove 7, and a first winding electrode sheet 11 and a first unwinding motor sheet 12 are provided on the left side inside the balance groove 7. The second winding electrode sheet 8, the second unwinding electrode sheet 9, the first winding electrode sheet 11, and the first unwinding motor sheet 12 are all arranged in parallel with the fixed rod 18. The first winding electrode sheet 11 and the second winding electrode sheet 8 are at the same height and are located above the metal ball 10. The first unwinding motor sheet 12 and the second unwinding electrode sheet 9 are at the same height and are located below the metal ball 10. Adjusting movable grooves 17 are formed on both side surfaces of the balance groove 7. The cross-section of the adjusting movable groove 17 is in a "C" shape. An adjusting rotating shaft 30 is arranged inside the adjusting movable groove 17. The bottom end of the adjusting rotating shaft 30 is rotatably connected to the adjusting movable groove 17, and the top end of the adjusting rotating shaft 30 is connected to a synchronous pulley 25. The top end of the synchronous pulley 25 is connected to a rotating shaft 26.

[0036] The present invention can be further configured such that one group of rotating shafts 26 close to the first winding electrode sheet 11 is rotatably connected to the adjusting movable groove 17. The top end of the other group of rotating shafts 26 is connected to an adjusting motor 27. A synchronous belt 28 is arranged outside the two groups of synchronous pulleys 25. The synchronous belt 28 cooperates with the synchronous pulleys 25 to drive the two groups of adjusting rotating shafts 30 to rotate synchronously. An activity limiting block 22 is sleeved on the middle surface of the adjusting rotating shaft 30. A first movable block 21 and a second movable block 23 are sleeved on the outer surface of the adjusting rotating shaft 30. The second movable block 23 is located above the activity limiting block 22, and the first movable block 21 is located below the activity limiting block 22. One group of second movable blocks 23 is connected to the first winding electrode sheet 11, and the other group of second movable blocks 23 is connected to the second winding electrode sheet 8. One group of first movable blocks 21 is connected to the first unwinding motor sheet 12, and the other group of first movable blocks 21 is connected to the second unwinding electrode sheet 9.

[0037] The present invention can be further configured such that a right-handed external thread is formed on one side surface of the adjusting rotating shaft 30 located at the second movable block 23, and a right-handed internal thread is formed on the inner wall of the second movable block 23. The thread of the adjusting rotating shaft 30 matches the thread of the second movable block 23. A left-handed external thread is formed on one side surface of the adjusting rotating shaft 30 located at the first movable block 21, and a left-handed internal thread is formed on the inner wall of the first movable block 21. The thread of the adjusting rotating shaft 30 matches the thread of the first movable block 21. A limiting sliding groove 24 is formed on the side surface of the adjusting movable groove 17 away from the fixed rod 18. A limiting sliding block 29 is connected to the side surface of the first movable block 21 and the second movable block 23 away from the fixed rod 18. The limiting sliding block 29 is located inside the limiting sliding groove 24. The cross-sections of the limiting sliding groove 24 and the limiting sliding block 29 are both in a "T" shape. The limiting sliding groove 24 and the limiting sliding block 29 cooperate to axially limit the second movable block 23 and the first movable block 21.

[0038] The present invention can be further configured as follows: a first drive motor 13 is arranged inside a group of balancing fixed blocks 2 near the first winding electrode sheet 11, one end of the first drive motor 13 is fixed inside the balancing fixed block 2, and the other end is connected to the adjusting cylinder 14, and a first traction rope 3 is sleeved on the outside of the adjusting cylinder 14, the other end of the first traction rope 3 passes through the balancing fixed block 2 and is connected to the balancing movable block 5, and a touch switch is arranged on the surface of the first winding electrode sheet 11 and the first unwinding motor sheet 12, and the touch switch controls the forward or reverse rotation of the first drive motor 13; a second drive motor 15 is arranged inside a group of balancing fixed blocks 2 near the fixed rod 18, one end of the second drive motor 15 is fixed inside the balancing fixed block 2, and the other end is connected to the adjusting cylinder 14, and a second traction rope 6 is sleeved on the outside of the adjusting cylinder 14, the other end of the second traction rope 6 passes through the balancing fixed block 2 and is connected to the balancing movable block 5, and a touch switch is arranged on the surface of the second winding electrode sheet 8 and the second unwinding electrode sheet 9, and the touch switch controls the forward or reverse rotation of the second drive motor 15.

[0039] When the surveying and mapping UAV is hovering, when the surveying and mapping UAV is in a horizontal state, the metal ball 10 is horizontal with the balance link 16, and the metal ball 10 is between the second winding electrode sheet 8 and the second unwinding electrode sheet 9 and the first winding electrode sheet 11 and the first unwinding motor sheet 12. When the surveying and mapping UAV tilts to the left, the two groups of metal balls 10 contact the second winding electrode sheet 8 and the first unwinding motor sheet 12 respectively, thereby starting the second drive motor 15 through the second winding electrode sheet 8, so that the second drive motor 15 drives the adjusting cylinder 14 to rewind the second traction rope 6, and starts the first drive motor 12 through the first unwinding motor sheet 12. Motor 13, so that the first driving motor 13 drives the adjusting cylinder 14 to unwind the first traction rope 3, thereby pulling the balancing movable block 5 to the right, and guiding the balancing movable block 5 to limit the position through the sliding guide rod 4, so as to balance the surveying and mapping UAV. When the surveying and mapping UAV is in balance, the metal ball 10 is separated from the second winding electrode sheet 8 and the first unwinding motor sheet 12, and the balancing movable block 5 stops moving. On the contrary, the metal ball 10 touches the first winding electrode sheet 11 and the second unwinding electrode sheet 9 to drive the balancing movable block 5 to move to the left, thereby balancing the surveying and mapping UAV, ensuring the stability of the surveying and mapping UAV when hovering.

[0040] By starting the adjustment motor 27 to drive a group of synchronous wheels 25 to rotate, and through the cooperation of the synchronous belt 28 and the synchronous wheel 25 to drive the two groups of adjustment shafts 30 to rotate, the second movable block 23 and the first movable block 21 are driven to move closer or farther away synchronously, thereby adjusting the spacing between the first winding electrode sheet 11 and the first unwinding motor sheet 12 and the second winding electrode sheet 8 and the second unwinding electrode sheet 9, thereby adjusting the inclination angle of the metal ball 10 contacting the second winding electrode sheet 8 or the second unwinding electrode sheet 9, thereby adjusting the balance angle of the surveying and mapping UAV when hovering to adapt to different working environments.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A balancing device for hovering a surveying and mapping UAV, characterized by: The suspension balance device of the surveying and mapping unmanned aerial vehicle includes: A balance fixing base (1), fixed in the center of the surveying and mapping unmanned aerial vehicle; Two groups of balance fixing blocks (2), fixed at both ends of the side surface of the balance fixing base (1); A balance movable block (5), arranged outside the balance fixing base (1) and located between the two groups of balance fixing blocks (2); Sliding guide rods (4), arranged between the two groups of balance fixing blocks (2), connected to the balance fixing blocks (2) at both ends, parallel to the balance fixing base (1), and multiple groups are provided. Multiple groups of sliding guide rods (4) pass through the balance movable block (5); A balance groove (7), opened in the center of the side surface of the balance fixing base (1) close to the balance fixing block (2); A fixing rod (18), fixed in the center of the innermost surface of the balance groove (7) and horizontally arranged; and A metal ball (10), arranged inside the balance groove (7); A limiting plate (20) is arranged on the surface of one end of the fixing rod (18) close to the balance movable block (5). Two groups of limiting plates (20) are provided, and a rotating ring (19) is arranged between the two groups of limiting plates (20). The rotating ring (19) is sleeved on the surface of the fixing rod (18) and is rotatably connected to the fixing rod (18). Two balance connecting rods (16) are connected to the side surface of the rotating ring (19). The included angle between the two balance connecting rods (16) is 180 degrees, and a metal ball (10) is connected to the end of the balance connecting rod (16) far from the rotating ring (19); A second winding electrode plate (8) and a second unwinding electrode plate (9) are arranged on the right side inside the balance groove (7), and a first winding electrode plate (11) and a first unwinding motor plate (12) are arranged on the left side inside the balance groove (7). The second winding electrode plate (8), the second unwinding electrode plate (9), the first winding electrode plate (11), and the first unwinding motor plate (12) are all parallel to the fixing rod (18). The first winding electrode plate (11) and the second winding electrode plate (8) are at the same height and are located above the metal ball (10). The first unwinding motor plate (12) and the second unwinding electrode plate (9) are at the same height and are located below the metal ball (10); Adjusting movable grooves (17) are opened on both side surfaces of the balance groove (7). The cross-section of the adjusting movable groove (17) is in a "C" shape structure. An adjusting rotating shaft (30) is arranged inside the adjusting movable groove (17). The bottom end of the adjusting rotating shaft (30) is rotatably connected to the adjusting movable groove (17), and the top end of the adjusting rotating shaft (30) is connected to a synchronous pulley (25). The top end of the synchronous pulley (25) is connected to a rotating shaft (26).

2. The hovering balancing device for a surveying and mapping UAV according to claim 1 is characterized in that: One group of rotating shafts (26) close to the first winding electrode plate (11) is rotatably connected to the adjusting movable groove (17). The top end of the other group of rotating shafts (26) is connected to an adjusting motor (27). A synchronous belt (28) is arranged outside the two groups of synchronous pulleys (25). The synchronous belt (28) cooperates with the synchronous pulleys (25) to drive the two groups of adjusting rotating shafts (30) to rotate synchronously.

3. The hovering balancing device for a surveying and mapping UAV according to claim 2 is characterized in that: The central surface of the adjusting shaft (30) is sleeved with a movable limit block (22), and the outer surface of the adjusting shaft (30) is sleeved with a first movable block (21) and a second movable block (23), the second movable block (23) is located above the movable limit block (22), the first movable block (21) is located below the movable limit block (22), and one group of the second movable blocks (23) is connected to the first winding electrode sheet (11), another group of the second movable blocks (23) is connected to the second winding electrode sheet (8), one group of the first movable blocks (21) is connected to the first unwinding motor sheet (12), and another group of the first movable blocks (21) is connected to the second unwinding electrode sheet (9).

4. The hovering balancing device for a surveying and mapping UAV according to claim 3 is characterized by: The adjusting shaft (30) is located on one side of the second movable block (23) and has a right-handed external thread on its surface, the second movable block (23) has a right-handed internal thread on its inner wall, and the adjusting shaft (30) matches the thread of the second movable block (23); the adjusting shaft (30) is located on one side of the first movable block (21) and has a left-handed external thread on its surface, the first movable block (21) has a left-handed internal thread on its inner wall, and the adjusting shaft (30) matches the thread of the first movable block (21).

5. The hovering balancing device for a surveying and mapping UAV according to claim 4 is characterized in that: A limiting slide groove (24) is provided on the surface of the adjusting movable groove (17) on the side away from the fixed rod (18), and a limiting slider (29) is connected to the surface of the first movable block (21) and the second movable block (23) on the side away from the fixed rod (18), the limiting slider (29) is located inside the limiting slide groove (24), and the cross-sections of the limiting slider (29) and the limiting slide groove (24) are both in a "T"-shaped structure, and the limiting slide groove (24) and the limiting slider (29) cooperate to axially limit the second movable block (23) and the first movable block (21).

6. The hovering balancing device for a surveying and mapping UAV according to claim 5 is characterized by: A first drive motor (13) is arranged inside a group of balancing fixed blocks (2) near the first winding electrode sheet (11); one end of the first drive motor (13) is fixed inside the balancing fixed block (2); the other end is connected to an adjustment cylinder (14); a first traction rope (3) is sleeved on the outside of the adjustment cylinder (14); the other end of the first traction rope (3) passes through the balancing fixed block (2) and is connected to the balancing movable block (5); and touch switches are arranged on the surfaces of the first winding electrode sheet (11) and the first unwinding motor sheet (12); and the touch switches control the forward or reverse rotation of the first drive motor (13).

7. The hovering balancing device for a surveying and mapping UAV according to claim 6 is characterized by: A second drive motor (15) is arranged inside a group of balancing fixed blocks (2) close to the fixed rod (18); one end of the second drive motor (15) is fixed inside the balancing fixed block (2); the other end is connected to the adjustment cylinder (14); a second traction rope (6) is sleeved on the outside of the adjustment cylinder (14); the other end of the second traction rope (6) passes through the balancing fixed block (2) and is connected to the balancing movable block (5); and a touch switch is arranged on the surface of the second winding electrode sheet (8) and the second unwinding electrode sheet (9); and the touch switch controls the forward or reverse rotation of the second drive motor (15).

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