Anti-interference fixing support for coaxial unmanned aerial vehicle measuring device

Abstract

The utility model relates to unmanned plane technical field discloses coaxial structure unmanned plane measuring equipment anti -interference fixed bolster, including shell and the gear pull rod mechanism of setting in the shell inside, gear pull rod mechanism contains motor, gear post, fixed block and slider assembly, motor drive gear post rotates, drives the axial lifting of movable slider along with screw cooperation, movable slider contracts or extends through push -and -pull rod drive connecting rod, and the shock absorbing spring and support plate of cooperation bottom, realize the automatic retraction and landing buffer of undercarriage, in addition, the support still integrated the helical variable pitch structure in the top cap to adjust the flight attitude, and through the shock absorbing damping interface of shell bottom and the electromagnetic shielding layer installation measuring equipment inside. The utility model has the beneficial effect that the terrain adaptability is strong, landing is stable, flight control is flexible and can effectively isolate electromagnetic and vibration interference, and the reliability of measurement operation is improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to an anti-interference fixing bracket for coaxial structure UAV measuring equipment. Background Technology

[0002] Currently, coaxial dual-rotor UAVs are widely used in fields such as topographic mapping and environmental monitoring due to their compact structure and good hovering stability. They usually need to carry high-precision measuring equipment under the fuselage.

[0003] However, existing coaxial UAV landing gear typically uses a fixed rigid support structure. This structure cannot adjust the support angle when facing uneven and complex terrain in the field, which can easily lead to the fuselage tilting or even tipping over. At the same time, the impact force generated by rigid landing is directly transmitted to the fuselage, which can easily damage the precision measuring equipment mounted on it. In addition, the high-power motors of UAVs generate strong electromagnetic fields and high-frequency mechanical vibrations when they are running, and the existing fixed supports lack effective isolation measures, which often interferes with the data acquisition of the measuring equipment, seriously affecting the accuracy of the measurement and the reliability of the equipment.

[0004] Therefore, this utility model proposes a coaxial structure anti-interference fixing bracket for UAV measurement equipment to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of poor terrain adaptability, insufficient landing cushioning performance, and lack of anti-interference protection measures for precision instruments in the existing coaxial UAV mounting brackets, which lead to inaccurate measurement data and easy damage to the equipment, this utility model aims to provide an anti-interference mounting bracket for UAV measurement equipment with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a coaxial structure anti-interference fixing bracket for UAV measurement equipment, including: a shell, and a gear tie rod mechanism disposed inside the shell; as well as a fixing block, a motor, a gear column and a slider assembly.

[0007] The gear-lever mechanism features a linkage and self-locking support structure. The motor is fixedly installed inside the housing, and its output end is connected to the gear column, which extends vertically. The slider assembly includes a movable slider, a push-pull rod, and a connecting rod. The movable slider is sleeved on the gear column and threadedly engaged with it. The movable slider is configured to move up and down along the axial direction of the gear column as it rotates.

[0008] Furthermore, the push-pull rod, the connecting rod, and the fixed block are combined through a multi-point rotational engagement. Specifically, the fixed block is fixed inside the housing and located below the gear column; one end of the push-pull rod is rotatably connected to the movable slider, the other end of the push-pull rod is rotatably connected to the connecting rod, and the bottom end of the push-pull rod is rotatably connected to the fixed block; the connecting rod is configured to retract or extend under the drive of the push-pull rod to change the support angle.

[0009] Preferably, the connecting rod of the slider assembly has a multi-stage buffer structure, and the slider assembly further includes a shock-absorbing spring and a support plate; the shock-absorbing spring is connected to the bottom end of the connecting rod, and the support plate is installed below the shock-absorbing spring and is used to contact the ground.

[0010] Preferably, it further includes a top cover and a helical pitch-changing structure disposed inside the top cover, the top cover being installed on the top of the outer casing, and the helical pitch-changing structure being connected to fan blades.

[0011] Preferably, the electric actuator of the helical pitch structure has a linear drive structure, and the helical pitch structure includes an electric actuator, a push rod, and a pitch-changing rocker arm; the electric actuator is installed inside the top cover, and the push rod is connected to the telescopic end of the electric actuator.

[0012] Preferably, the connection between the push rod and the variable pitch rocker arm is a rotary connection with rotation isolated by bearings. Both ends of the push rod are provided with bearings, and the push rod is connected to the variable pitch rocker arm through the bearings. The variable pitch rocker arm is connected to the fan blade, and the electric actuator drives the push rod to extend and retract, thereby causing the variable pitch rocker arm to move and changing the tilt angle of the fan blade.

[0013] Preferably, the surface or bottom of the housing has a measuring device mounting interface for physical vibration isolation. The measuring device mounting interface is connected to the housing through a shock-absorbing damping component to isolate vibrations generated by the motor.

[0014] Preferably, the push-pull rod and the connecting rod of the gear-pull mechanism form a linkage mechanism. When the movable slider moves downward, the push-pull rod pushes the connecting rod to extend outward; when the movable slider moves upward, the push-pull rod pulls the connecting rod to retract inward.

[0015] Preferably, the inner wall of the housing is made of a conductive metal material with electromagnetic shielding function or has an electromagnetic shielding layer to prevent the electromagnetic signals generated by the motor from interfering with external measuring equipment.

[0016] Preferably, the connection between the push-pull rod and the fixed block is a hinged connection with a pivot, which allows the push-pull rod to deflect at an angle relative to the fixed block.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model, by setting up a gear tie rod mechanism, uses a motor to drive the lead screw to rotate, which drives the slider assembly to move up and down. Then, through the linkage of the push-pull rod and the connecting rod, the landing gear can be automatically retracted and extended. This solves the problems of the existing coaxial UAV landing gear structure being fixed and unable to be retracted, resulting in high flight drag and inability to adapt to complex terrain. It achieves the technical effect of flexible take-off and landing, the ability to adjust the support angle according to the terrain, and reduced flight drag.

[0019] 2. This utility model solves the problem of large impact force and easy damage to internal precision components of existing UAVs by setting shock-absorbing springs and support plates at the bottom of the landing gear linkage, and achieves the technical effect of effectively buffering the landing impact and protecting the fuselage structure and internal measuring equipment.

[0020] 3. This utility model solves the problems of slow response and insufficient flexibility in the flight attitude adjustment of existing UAVs by setting a spiral pitch-changing structure inside the top cover and using an electric push rod in conjunction with a bearing to drive the pitch-changing rocker arm to swing. It achieves the technical effect of being able to quickly and accurately change the tilt angle of the fan blades and realize stable turning and obstacle avoidance.

[0021] 4. This utility model solves the problem of high-frequency vibration of motors and electromagnetic signals seriously interfering with the accuracy of measurement data when existing UAVs perform measurement tasks by setting an electromagnetic shielding layer on the inner wall of the outer shell and setting a shock-absorbing damping component at the installation location of the measuring equipment. It achieves the technical effect of dual protection of physical vibration isolation and electromagnetic shielding, and significantly improves the measurement accuracy. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the anti-interference fixing bracket for the coaxial structure UAV measuring equipment proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the rotating pitch structure of the anti-interference fixed bracket for the coaxial structure UAV measuring equipment proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the variable-pitch rocker arm of the anti-interference fixed bracket for the coaxial structure UAV measuring equipment proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the gear tie rod mechanism of the anti-interference fixed bracket for the coaxial structure UAV measuring equipment proposed in this utility model.

[0026] Legend:

[0027] 1. Outer shell;

[0028] 2. Top cover; 21. Fan blades;

[0029] 22. Helical variable pitch structure; 221. Electric actuator; 222. Push rod; 223. Bearing; 224. Variable pitch rocker arm;

[0030] 3. Gear and tie rod mechanism; 31. Motor;

[0031] 32. Slider assembly; 321. Gear post; 322. Push-pull rod; 323. Connecting rod; 324. Moving slider; 325. Shock-absorbing spring; 326. Support plate; 33. Fixing block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0033] Example:

[0034] Reference Figures 1 to 4 This utility model provides a coaxial structure anti-interference fixing bracket for UAV measurement equipment, aiming to solve the technical problems of existing coaxial UAV take-off and landing brackets lacking terrain adaptability, insufficient buffering performance, and lack of anti-interference protection measures for precision measurement equipment.

[0035] like Figure 1 and Figure 2 As shown, the anti-interference mounting bracket for the coaxial structure UAV measurement equipment includes a housing 1 and a top cover 2 fixedly installed on the top of the housing 1. The housing 1 serves as the mounting base for the overall device and the housing for the internal mechanisms, protecting the internal precision mechanical components from external environmental influences. The top cover 2, together with the housing 1, forms a closed or semi-closed space for installing flight control-related components. The housing 1 contains a gear-lever mechanism 3, which enables automatic retraction and extension of the UAV landing gear, terrain adaptation adjustment, and landing cushioning. The top cover 2 contains a helical pitch-changing structure 22, which is connected to a fan blade 21. This helical pitch-changing structure 22 is used to adjust the tilt angle of the fan blade 21 to change the flight attitude. The fan blade 21 is located outside the top cover 2 and provides flight power.

[0036] Reference Figure 2 and Figure 4The gear rod mechanism 3 mainly consists of a motor 31, a gear column 321, a fixing block 33, and a slider assembly 32. The motor 31 is fixedly installed on the upper side or side wall of the inner space of the outer casing 1 by bolts. The output end of the motor 31 is connected to the gear column 321. The gear column 321 extends vertically and has a threaded structure on its surface, serving as a lead screw. The fixing block 33 is fixedly installed inside the outer casing 1 and located directly below the gear column 321. The fixing block 33 is used to provide a stable rotation fulcrum for the gear rod mechanism 3.

[0037] The slider assembly 32 is disposed between the gear post 321 and the fixed block 33, and specifically includes a movable slider 324, a push-pull rod 322 and a connecting rod 323. The movable slider 324 has a threaded hole in the center that matches the gear post 321. The movable slider 324 is sleeved on the gear post 321 and forms a threaded transmission engagement with the gear post 321. When the motor 31 drives the gear post 321 to rotate, the movable slider 324 is driven by the thread to move up and down along the axial direction of the gear post 321.

[0038] One end of the push-pull rod 322 is rotatably connected to the movable slider 324 via a pin, and the other end of the push-pull rod 322 is rotatably connected to the middle or end of the connecting rod 323. The bottom end of the push-pull rod 322 is rotatably connected to the fixed block 33 via a pivot. This connection allows the push-pull rod 322 to deflect at an angle around the pivot on the fixed block 33. The connecting rod 323 is configured to retract or extend under the drive of the push-pull rod 322. The push-pull rod 322 and the connecting rod 323 form a linkage mechanism. When the movable slider 324 moves downward, the push-pull rod 322 pushes the connecting rod 323 to extend outward. When the movable slider 324 moves upward, the push-pull rod 322 pulls the connecting rod 323 to retract inward, thereby changing the support angle and adapting to different landing terrains.

[0039] A shock-absorbing spring 325 is connected to the end of the connecting rod 323 away from the outer casing 1. A support plate 326 is connected to the bottom of the shock-absorbing spring 325. The support plate 326 is used to directly contact the ground. The shock-absorbing spring 325 is used to absorb the impact force at the moment of landing and protect the machine body and internal equipment. The connecting rod 323, push-pull rod 322 and fixing block 33 are set in multiple groups, such as three or four groups. The multiple groups of connecting rods 323 are evenly distributed around the axis of the gear column 321 to form a multi-point support structure. The surface or bottom of the outer casing 1 is provided with a measuring equipment mounting interface. The measuring equipment mounting interface is elastically connected to the outer casing 1 through a shock-absorbing damping component. The shock-absorbing damping component is, for example, a silicone shock-absorbing ball or a hydraulic damper, which can effectively isolate the high-frequency vibration generated by the motor 31 when it is working and prevent the vibration from being transmitted to the mounted precision measuring equipment. The inner wall of the outer casing 1 is also provided with an electromagnetic shielding layer or a metal shielding mesh. The electromagnetic shielding layer is made of conductive metal material and is used to isolate the electromagnetic interference generated by the motor 31.

[0040] The top cover 2 is equipped with a helical pitch-changing structure 22, which includes an electric push rod 221, a push rod 222, a bearing 223, and a pitch-changing rocker arm 224. The electric push rod 221 is fixedly installed in the internal cavity of the top cover 2 as a power drive component. The telescopic output end of the electric push rod 221 is fixedly connected to the push rod 222. The two ends of the push rod 222 are respectively fitted with bearings 223. The push rod 222 is connected to the electric push rod 221 through the lower bearing 223 and rotatably connected to the pitch-changing rocker arm 224 through the upper bearing 223. One end of the pitch-changing rocker arm 224 is connected to the push rod 222, and the other end extends to the outside of the top cover 2 and is hinged or fixedly connected to the root of the fan blade 21. With the setting of the bearing 223, the push rod 222 can perform a stable linear push-pull motion without being disturbed by the rotational torque while the fan blade 21 is rotating at high speed.

[0041] The inner wall surface of the outer casing 1 is coated with an electromagnetic shielding layer, or a metal shielding mesh is embedded in the internal structure of the outer casing 1. The electromagnetic shielding layer is made of high-conductivity metal materials such as copper and aluminum, which can effectively shield the electromagnetic field generated by the motor 31 when it runs at high speed, preventing it from interfering with the signal of the precision measuring equipment mounted below the outer casing 1. At the same time, the measuring equipment mounting interface at the bottom of the outer casing 1 is connected to the outer casing 1 through a shock-absorbing damping component. The shock-absorbing damping component is a silicone shock-absorbing ball or a hydraulic damper, which, together with the electromagnetic shielding layer, constitutes a dual anti-interference system of physical shock absorption and electromagnetic shielding.

[0042] The threaded fit between the movable slider 324 and the gear column 321 in the gear-pull mechanism 3 adopts a trapezoidal thread or a ball screw pair to withstand a large axial load. At the same time, the bottom end of the gear column 321 is supported on the fixed block 33 by the bearing 223 seat to ensure the concentricity of the gear column 321 when rotating. The connection between the push-pull rod 322 and the connecting rod 323, as well as the connection between the push-pull rod 322 and the fixed block 33, are provided with self-lubricating bushings to reduce the frictional resistance during the movement of the mechanism and extend its service life.

[0043] The implementation principle of this application embodiment is as follows: When the UAV is preparing to land, the internal sensor detects a landing command or altitude information, and controls the motor 31 to start. The motor 31 drives the gear column 321 to rotate. Since there is a threaded engagement between the movable slider 324 and the gear column 321, and the movable slider 324 is constrained by the push-pull rod 322 and cannot rotate with the gear column 321, the movable slider 324 moves downward along the gear column 321. During the downward movement of the movable slider 324, the movable slider 324 presses downward through the hinge point. The push-pull rod 322, with its bottom end restricted to the fixed block 33, deflects outward and pushes the connecting rod 323 outward until the connecting rod 323 is fully extended. At this time, the shock-absorbing spring 325 and the support plate 326 at the bottom of the connecting rod 323 contact the ground, using the shock-absorbing spring 325 to buffer the impact of landing. At the same time, the operator can control the motor 31 to fine-tune the height of the moving slider 324 according to the unevenness of the terrain, thereby changing the extension angle of the connecting rod 323 and adapting to different terrains.

[0044] After the drone takes off, the sensor controls the motor 31 to rotate in the opposite direction, which drives the gear column 321 to rotate in reverse. The moving slider 324 moves upward along the gear column 321. The moving slider 324 pulls the push-pull rod 322 to reset upward. The push-pull rod 322 then pulls the connecting rod 323 to retract inward, bringing the entire landing gear structure closer to the outer shell 1 to reduce flight drag.

[0045] When the drone needs to turn or adjust its attitude during flight, the spiral pitch-changing structure 22 inside the top cover 2 is activated, and the electric actuator 221 extends and retracts, driving the push rod 222 to move up and down. The push rod 222 drives the pitch-changing rocker arm 224 to swing through the bearing 223. The swing of the pitch-changing rocker arm 224 directly changes the tilt angle of the fan blades 21, thereby changing the direction of the lift vector generated by the rotor, realizing the tilting and turning of the drone fuselage. During this process, the measuring equipment at the bottom is protected by shock-absorbing damping components and electromagnetic shielding layer, and is always in a stable working environment with low vibration and low interference, ensuring the accuracy of the measurement data.

Claims

1. Anti-interference mounting bracket for coaxial structure UAV measurement equipment, including: The outer casing (1) and the gear lever mechanism (3) disposed inside the outer casing (1); Its features are, The gear tie rod mechanism (3) includes a motor (31), a gear column (321), a fixed block (33), and a slider assembly (32). The motor (31) is fixedly installed inside the housing (1). The output end of the motor (31) is connected to the gear column (321). The gear column (321) extends in the vertical direction. The slider assembly (32) includes a movable slider (324), a push-pull rod (322), and a connecting rod (323). The movable slider (324) is sleeved on the gear column (321) and threadedly engaged with the gear column (321). The movable slider (324) is configured to move up and down along the axial direction of the gear column (321) as the gear column (321) rotates. The fixed block (33) is fixed inside the outer shell (1) and located below the gear column (321). One end of the push-pull rod (322) is rotatably connected to the movable slider (324), and the other end of the push-pull rod (322) is rotatably connected to the connecting rod (323). The bottom end of the push-pull rod (322) is rotatably connected to the fixed block (33). The connecting rod (323) is configured to retract or extend under the drive of the push-pull rod (322) to change the support angle.

2. The anti-interference fixing bracket for coaxial structure UAV measuring equipment according to claim 1, characterized in that, The slider assembly (32) also includes a shock-absorbing spring (325) and a support plate (326). The shock-absorbing spring (325) is connected to the bottom end of the connecting rod (323), and the support plate (326) is installed below the shock-absorbing spring (325) and is used to contact the ground.

3. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 1, characterized in that, It also includes a top cover (2) and a spiral variable pitch structure (22) disposed inside the top cover (2). The top cover (2) is installed on the top of the outer shell (1), and the spiral variable pitch structure (22) is connected to a fan blade (21).

4. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 3, characterized in that, The helical pitch structure (22) includes an electric actuator (221), a push rod (222), and a pitch rocker arm (224). The electric actuator (221) is installed inside the top cover (2), and the push rod (222) is connected to the telescopic end of the electric actuator (221).

5. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 4, characterized in that, Both ends of the push rod (222) are provided with bearings (223). The push rod (222) is connected to the variable pitch rocker arm (224) through the bearings (223). The variable pitch rocker arm (224) is connected to the fan blade (21). The electric push rod (221) drives the push rod (222) to extend and retract, thereby causing the variable pitch rocker arm (224) to move and change the tilt angle of the fan blade (21).

6. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 1, characterized in that, The surface or bottom of the housing (1) is provided with a measuring device mounting interface, which is connected to the housing (1) through a shock-absorbing damping component to isolate the vibration generated by the motor (31).

7. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 1, characterized in that, The push-pull rod (322) and the connecting rod (323) form a linkage mechanism. When the movable slider (324) moves downward, the push-pull rod (322) pushes the connecting rod (323) to extend outward. When the movable slider (324) moves upward, the push-pull rod (322) pulls the connecting rod (323) to retract inward.

8. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 1, characterized in that, The inner wall of the outer casing (1) is provided with an electromagnetic shielding layer to prevent the electromagnetic signals generated by the motor (31) from interfering with external measuring equipment.

9. The anti-interference fixing bracket for the coaxial structure UAV measuring equipment according to claim 1, characterized in that, The push-pull rod (322) is provided with a pivot at the connection between it and the fixed block (33), allowing the push-pull rod (322) to deflect at an angle relative to the fixed block (33).

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