A small UAV aerial photography shock absorption device

Abstract

The present invention discloses a small-sized unmanned aerial photography shock absorption device, which relates to the field of aerial photography shock absorption technology. The present invention comprises a top plate and a bottom plate, wherein the top plate is fixedly mounted on the bottom of the unmanned aerial vehicle, and the bottom of the top plate is provided with a plurality of welding disks in an annular manner, and the bottom of the welding disk is welded with a plurality of spiral shock-absorbing spring strips, and the bottom of the spiral shock-absorbing spring strips is fixedly connected with a slider, and the top of the chassis is rotatably provided with a plurality of adjustment disks, and the adjustment disks are provided corresponding to the welding disks, and the interior of the adjustment disks is provided with a plurality of linear sliding openings, and the top of the chassis is provided with a plurality of arc-shaped guide grooves, and the sliders are slidably connected in the linear sliding openings, and the guide posts are inserted in the arc-shaped guide grooves. The present invention increases the number of winding turns of the spiral shock-absorbing spring strips while the drone lens rotates, and closes the bottom ends together, thereby increasing the shock absorption damping and ensuring the stability of the lens during rotation shooting. At the same time, the damping is adjusted by rotating and retracting, and the adjustment method is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial photography vibration reduction, and in particular to a small unmanned aerial vehicle (UAV) aerial photography vibration reduction device. Background Art

[0002] With the continuous development of drone technology, especially in the field of aerial photography, drone applications have gradually penetrated into various industries, including agricultural monitoring, environmental protection, urban planning, and film and television production. However, in these applications, drone stability and image quality have always been core issues of concern to users. In particular, during aerial photography, drone vibration can affect the camera equipment, resulting in reduced image quality and even affecting the accuracy of post-processing.

[0003] A Chinese patent (publication number: CN107444666A) discloses an aerial photography drone with a camera vibration reduction device, comprising a drone housing, rotating propellers, a camera vibration reduction sleeve, and a controller. This device primarily reduces camera vibration by providing a camera vibration reduction sleeve and a vibration reduction ball. However, this structure provides uneven vibration reduction. If the drone's center of gravity is not at the installation center or rotation center, it may tilt during installation. Furthermore, during actual use, the drone's lens needs to be rotated. By rotating the lens, the camera can more flexibly adjust the shooting angle, expanding the shooting range. This is particularly effective when capturing complex scenes or requiring multi-angle images. However, the center of gravity of the lens of most drones is not at the center of rotation, which causes the center of gravity of the lens to shift when rotating. During installation, the shock absorber will not be tilted in the direction of the center of gravity shift. According to the principles of mechanics, the center of gravity shift means that more inertial force will be generated on that side, which may cause vibration or imbalance. Therefore, the shock absorber damping on the shifted side needs to adapt to this additional force. However, the above-mentioned patent and the existing shock absorber do not have the effect of adjusting the shock absorber damping according to the center of gravity, and the shock absorption effect is poor. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a small UAV aerial photography shock absorption device.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A small drone aerial photography shock absorption device comprises a top plate and a bottom plate. The top plate is fixedly mounted on the bottom of the drone. The bottom of the top plate is provided with multiple sets of welded plates in an annular shape. The bottom of the welded plates is welded with multiple sets of spiral shock-absorbing spring strips. The multiple sets of spiral shock-absorbing spring strips are distributed in an annular shape. The bottom of the spiral shock-absorbing spring strips is fixedly connected to a slider. The bottom of the slider is provided with a guide column.

[0007] The chassis is located below the top plate, and the aerial photography lens is installed below the chassis. Multiple sets of adjustment disks are rotatably installed on the top of the chassis, and the adjustment disks are arranged corresponding to the welding disks. Multiple sets of straight sliding openings are opened inside the adjustment disks, and multiple sets of arc guide grooves are opened on the top of the chassis. The sliders are slidably connected in the straight sliding openings, and the guide posts are inserted in the arc guide grooves, and the diameter of the guide posts is greater than the width of the straight sliding openings.

[0008] Furthermore, it also includes a connecting rod fixedly installed on the aerial photography lens, a top block is fixedly installed on the top of the connecting rod, and multiple groups of transmission gear rods are slidably connected to the bottom of the chassis. The transmission gear rods are arranged corresponding to the adjustment disk, and an arc-shaped pressure strip is provided on the outer side of the transmission gear rod. The bottom of the adjustment disk is fixedly connected with an adjustment gear, and the adjustment gear is engaged with the transmission gear rod. The top block touches the arc-shaped pressure strip, and the width of the top block is greater than the spacing between adjacent arc-shaped pressure strips. The arc-shaped pressure strip is symmetrically designed about the adjustment gear.

[0009] Furthermore, a guide sleeve is provided at the bottom of the chassis, and a sliding column is provided at one end of the transmission gear rod away from the arc-shaped pressure strip, and the sliding column is slidably connected in the guide sleeve.

[0010] Furthermore, the connecting rod is fixedly mounted on the aerial camera lens via a connecting hoop, and the connecting hoop is composed of two semicircular rings, which are fixedly connected by bolts.

[0011] Furthermore, a support column is provided at the bottom of the chassis, an aerial lens mounting plate is installed at the bottom of the support column, the aerial lens is installed at the bottom of the aerial lens mounting plate, and a ring is provided on the outside of the connecting rod, which is rotatably installed on the support column.

[0012] Furthermore, the thickness of the top block is greater than the thickness of the arc-shaped beading.

[0013] Furthermore, the outer side of the linear sliding port is threadedly connected to a limiting bolt.

[0014] Furthermore, the interior of the top plate is designed to be hollow.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention adopts a circular combination of multiple groups of spiral shock-absorbing spring bars to provide shock absorption for the drone. The spiral spring bars have a relatively simple structure and low cost, and the shock absorption effect can be evenly distributed in the entire annular area. Compared with traditional single-direction shock absorption, the annular distribution can evenly absorb and disperse the impact force in multiple directions, thereby improving the overall shock absorption performance. This load distribution method not only improves the overall performance of the shock absorption system, but also avoids damage caused by overload of a single spring bar, thereby extending the service life and improving the stability of the system.

[0017] 2. The present invention controls the rotation of the adjustment disk at the corresponding position while the drone lens rotates. The adjustment disk drives the spiral shock-absorbing spring strip to rotate through the slider. At the same time, under the action of the guide column and the arc guide groove, the slider drives the bottom end of the spiral shock-absorbing spring strip to retract inward, the number of winding turns of the spiral shock-absorbing spring strip increases, and the bottom ends are close together, thereby increasing the shock absorption damping, so that the shock absorption damping changes synchronously with the rotation of the lens, ensuring the stability of the lens during rotation shooting. At the same time, the method of rotating and retracting to adjust the damping is simple and compact, so that the device can be applied to drones with different center of gravity offsets, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation of the shock absorbing device of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the shock absorbing device of the present invention Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the shock absorbing device of the present invention Figure 2 ;

[0021] Figure 4 The shock absorbing device of the present invention explodes Figure 1 ;

[0022] Figure 5 The shock absorbing device of the present invention explodes Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the chassis structure of the present invention Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the chassis structure of the present invention Figure 2 ;

[0025] Figure 8 2. This is a schematic diagram of the deployment of the spiral shock-absorbing spring strip of the present invention;

[0026] Figure 9 It is a schematic diagram of the spiral shock-absorbing elastic strip of the present invention being collapsed.

[0027] Figure numerals: 1. top plate; 2. bottom plate; 21. arc-shaped guide groove; 22. transmission gear rod; 23. arc-shaped pressure strip; 24. aerial camera mounting plate; 3. adjustment plate; 31. adjustment gear; 32. linear slide; 33. limit bolt; 4. spiral shock-absorbing spring strip; 41. slider; 42. guide column; 5. connecting rod; 51. connecting clamp; 52. collar; 6. top block. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, 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.

[0029] Example 1, as Figures 1-9 As shown, a small UAV aerial photography shock absorption device includes a top plate 1 and a bottom plate 2. The top plate 1 is fixedly mounted on the bottom of the UAV. A plurality of sets of welding plates are provided in an annular manner at the bottom of the top plate 1. A plurality of sets of spiral shock-absorbing spring strips 4 are welded to the bottom of the welding plates. The plurality of spiral shock-absorbing spring strips 4 are distributed in an annular manner. A slider 41 is fixedly connected to the bottom of the spiral shock-absorbing spring strips 4. A guide column 42 is provided at the bottom of the slider 41.

[0030] The chassis 2 is located below the top plate 1, and the aerial photography lens is installed below the chassis 2. Multiple sets of adjustment disks 3 are rotatably installed on the top of the chassis 2. The adjustment disks 3 are arranged corresponding to the welding disks. Multiple sets of straight sliding openings 32 are opened inside the adjustment disks 3. Multiple sets of arc guide grooves 21 are opened on the top of the chassis 2. The slider 41 is slidably connected in the straight sliding opening 32, and the guide column 42 is inserted in the arc guide groove 21. The diameter of the guide column 42 is larger than the width of the straight sliding opening 32.

[0031] Furthermore, the top plate 1 is designed to be hollow inside, which makes it easier to install the shock absorbing device on the bottom of the drone while reducing the overall gravity of the device.

[0032] When in use, the shock absorber is installed at the bottom of the drone, and then the drone is installed at the bottom of the shock absorber, so that the center of gravity of the drone corresponds to one of the groups of adjustment disks 3. The adjustment disk 3 is controlled to rotate according to the weight of the drone, and the adjustment disk 3 drives the slider 41 to rotate. At the same time, under the action of the arc guide groove 21 and the guide column 42, the slider 41 slides along the straight slide 32 to the inside of the adjustment disk 3. Since the top of the spiral shock-absorbing spring strip 4 is fixed, the bottom end will rotate and tighten, increasing the number of spiral turns of the spiral shock-absorbing spring strip 4. The damping strength at this position is increased, and the tension provided is more stable, thereby preventing the chassis 2 from deviating to this direction. It should be noted that when the bottom end of the spiral shock-absorbing spring strip 4 is fully extended, the multiple groups of spiral shock-absorbing spring strips 4 are drum-shaped with a protrusion in the middle. This can provide a more stable shock-absorbing effect while giving the spiral shock-absorbing spring strip 4 sufficient winding length. The bottom end of the spiral shock-absorbing spring strip 4 can be stably retracted and the number of spiral turns can be increased.

[0033] At the same time, during the shooting process of the adjustment disk 3, as the drone lens rotates, the center of gravity of the drone also rotates. It is only necessary to retract the spiral shock-absorbing spring strip 4 in the corresponding direction to increase the shock-absorbing damping at the end where the center of gravity of the drone is offset, preventing the chassis 2 from tilting in the direction of the center of gravity offset, thereby ensuring the overall stability of the drone and good shock-absorbing effect.

[0034] Therefore, the configuration of the shock absorbing device of the present invention is more suitable for shock absorption of an aerial camera with an offset center of gravity.

[0035] In this embodiment, a total of 24 spiral shock-absorbing spring strips 4 are used. The material of a single spiral shock-absorbing spring strip 4 is stainless steel (assuming Young's modulus E=200 GPa), the spring outer diameter is 20 mm, the wire diameter is 2 mm, the pitch is 5 mm, the length is 50 mm, and the load is 1 kg (about 9.81 N). The maximum weight of a professional-grade aerial photography device is generally 10 kg, which is sufficient for the shock-absorbing load of the aerial photography lens.

[0036] Embodiment 2, on the basis of the above embodiment, further includes a connecting rod 5 fixedly installed on the aerial photography lens, a top block 6 is fixedly installed on the top of the connecting rod 5, and multiple groups of transmission gear rods 22 are slidably connected to the bottom of the chassis 2, and the transmission gear rods 22 are arranged corresponding to the adjusting disk 3. An arc-shaped pressure strip 23 is arranged on the outer side of the transmission gear rod 22, and an adjusting gear 31 is fixedly connected to the bottom of the adjusting disk 3. The adjusting gear 31 is engaged with the transmission gear rod 22, and the top block 6 touches the arc-shaped pressure strip 23. The width of the top block 6 is greater than the spacing between adjacent arc-shaped pressure strips 23, and the arc-shaped pressure strip 23 is symmetrically designed about the adjusting gear 31. The adjusting gear 31 and the adjusting disk 3 are on the same axis, that is, they are symmetrically designed about the center of the adjusting disk 3.

[0037] Furthermore, the thickness of the top block 6 is greater than the thickness of the arc-shaped beading 23 , so that the top block 6 can press the arc-shaped beading 23 more stably.

[0038] During installation, the top block 6 is located on the reverse extension line from the center of gravity of the drone to the center of rotation of the drone. Therefore, when the drone lens rotates, the connecting rod 5 is driven to rotate, and the connecting rod 5 drives the top block 6 to rotate. The top block 6 rotates synchronously with the lens and is always on the same side as the center of gravity. When the top block 6 rotates to the center of the arc strip 23, the bottom end of the spiral shock-absorbing spring strip 4 is in a retracted state. As the lens rotates, the top block 6 rotates relative to the arc strip 23. Since the arc strip 23 is symmetrically designed with respect to the adjusting gear 31, when the top block 6 is away from the center of the arc strip 23, a distance will be formed between the top block 6 and the arc strip 23. At this time, under the action of the elastic force of the spiral shock-absorbing spring strip 4, The spiral shock-absorbing spring strip 4 rotates, and the spiral shock-absorbing spring strip 4 drives the adjusting disk 3 to rotate through the slider 41. The adjusting disk 3 drives the arc pressure strip 23 to press on the top block 6 through the adjusting gear 31 and the transmission gear rod 22. Therefore, the spiral shock-absorbing spring strip 4 in the original position is lowered. At the same time, the top block 6 contacts another set of arc pressure strips 23 in the rotation direction. The bottom end of the spiral shock-absorbing spring strip 4 corresponding to the arc pressure strip 23 is retracted, and the shock absorption damping is increased. That is to say, when the lens rotates to the middle of the two sets of adjusting disks 3, the two sets of adjusting disks 3 share gravity and share damping. Therefore, as the lens rotates, the shock absorption damping can change synchronously. The adjustment is simple, the structure is compact, and the flight load will not be increased too much.

[0039] Embodiment three, based on the above embodiment, further includes: a guide sleeve is provided at the bottom of the chassis 2, and a sliding column is provided at the end of the transmission gear rod 22 away from the arc-shaped pressure strip 23, and the sliding column is slidably connected in the guide sleeve. Through this design, the transmission gear rod 22 can slide stably without causing transmission interference.

[0040] Embodiment 4, based on the above embodiment, further includes that the connecting rod 5 is fixedly mounted on the aerial photography lens through a connecting clamp 51, and the connecting clamp 51 is composed of two semicircular rings, and the two semicircular rings are fixedly connected by bolts. Through this design, the connecting rod 5 can be fixedly mounted on different models of aerial photography devices.

[0041] Furthermore, a support column is provided at the bottom of the chassis 2, an aerial lens mounting plate 24 is installed at the bottom of the support column, the aerial lens is installed at the bottom of the aerial lens mounting plate 24, and a ring 52 is provided on the outer side of the connecting rod 5, which is rotatably installed on the support column.

[0042] The fifth embodiment, based on the above embodiment, further comprises: a limiting bolt 33 is connected to the outer side of the linear sliding opening 32 through a thread.

[0043] The design of the limiting bolt 33 can limit the maximum expansion angle of the bottom end of the spiral shock-absorbing spring strip 4, thereby controlling the initial elastic force of the spiral shock-absorbing spring strip 4, so that the device can be applied to drones of different weights and has a wider range of applications.

[0044] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A small UAV aerial photography shock absorption device, comprising a top plate (1) and a bottom plate (2), characterized in that: The top plate (1) is fixedly mounted on the bottom of the drone, and a plurality of welding plates are provided in an annular manner at the bottom of the top plate (1), and a plurality of spiral shock-absorbing spring strips (4) are welded to the bottom of the welding plates. A slider (41) is fixedly connected to the bottom of the spiral shock-absorbing spring strips (4), and a guide column (42) is provided at the bottom of the slider (41); The chassis (2) is located below the top plate (1), and the aerial camera lens is installed below the chassis (2). Multiple groups of adjustment disks (3) are rotatably installed on the top of the chassis (2), and the adjustment disks (3) are arranged corresponding to the welding disks. Multiple groups of straight sliding openings (32) are provided inside the adjustment disks (3), and multiple groups of arc-shaped guide grooves (21) are provided on the top of the chassis (2). The sliders (41) are slidably connected in the straight sliding openings (32), and the guide pillars (42) are inserted in the arc-shaped guide grooves (21), and the diameter of the guide pillars (42) is greater than the width of the straight sliding openings (32).

2. A small UAV aerial photography shock absorption device according to claim 1, characterized in that: The invention also includes a connecting rod (5) fixedly mounted on the aerial photography lens, a top block (6) fixedly mounted on the top of the connecting rod (5), a plurality of transmission gear rods (22) slidably connected to the bottom of the chassis (2), the transmission gear rods (22) and the adjustment disk (3) being arranged correspondingly, an arcuate pressure strip (23) being arranged on the outer side of the transmission gear rod (22), an adjustment gear (31) being fixedly connected to the bottom of the adjustment disk (3), the adjustment gear (31) being meshed with the transmission gear rod (22), the width of the top block (6) being greater than the spacing between adjacent arcuate pressure strips (23), and the arcuate pressure strips (23) being symmetrically designed with respect to the adjustment gear (31).

3. A small UAV aerial photography shock absorption device according to claim 2, characterized in that: A guide sleeve is provided at the bottom of the chassis (2), and a sliding column is provided at one end of the transmission gear rod (22) away from the arc-shaped pressure strip (23), and the sliding column is slidably connected in the guide sleeve.

4. A small UAV aerial photography shock absorption device according to claim 3, characterized in that: The connecting rod (5) is fixedly mounted on the aerial camera lens via a connecting hoop (51), wherein the connecting hoop (51) is composed of two semicircular rings, which are fixedly connected via bolts.

5. A small UAV aerial photography shock absorption device according to claim 4, characterized in that: A support column is provided at the bottom of the chassis (2), an aerial camera lens mounting plate (24) is mounted at the bottom of the support column, and the aerial camera lens is mounted at the bottom of the aerial camera lens mounting plate (24). A collar (52) is provided on the outer side of the connecting rod (5), and the collar (52) is rotatably mounted on the support column.

6. A small UAV aerial photography shock absorption device according to claim 5, characterized in that: The thickness of the top block (6) is greater than the thickness of the arc-shaped pressure strip (23).

7. The small UAV aerial photography shock absorption device according to claim 1, characterized in that: The outer side of the linear sliding opening (32) is threadedly connected to a limiting bolt (33).

8. The small UAV aerial photography shock absorption device according to claim 1, characterized in that: The top plate (1) has a hollow interior design.

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