CN113277074B - Unmanned aerial vehicle undercarriage of moving away to avoid possible earthquakes - Google Patents
Unmanned aerial vehicle undercarriage of moving away to avoid possible earthquakes Download PDFInfo
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- CN113277074B CN113277074B CN202110828242.XA CN202110828242A CN113277074B CN 113277074 B CN113277074 B CN 113277074B CN 202110828242 A CN202110828242 A CN 202110828242A CN 113277074 B CN113277074 B CN 113277074B
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- unmanned aerial
- aerial vehicle
- damping
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- 238000013016 damping Methods 0.000 claims abstract description 46
- 230000035939 shock Effects 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
- B64C25/62—Spring shock-absorbers; Springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U30/00—Means for producing lift; Empennages; Arrangements thereof
- B64U30/20—Rotors; Rotor supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2101/00—UAVs specially adapted for particular uses or applications
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Remote Sensing (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a shock-absorbing unmanned aerial vehicle undercarriage, which relates to the field of unmanned aerial vehicles and comprises a shock-absorbing mounting frame fixed at the bottom of an unmanned aerial vehicle body, wherein a primary shock-absorbing assembly is arranged at the bottom of the shock-absorbing mounting frame and comprises swing rods which are bilaterally symmetrical and rotatably connected with the shock-absorbing mounting frame, and a first shock-absorbing piece is fixedly connected between the outer side of each swing rod and the shock-absorbing mounting frame; the one end that the unmanned aerial vehicle organism was kept away from to the swinging arms rotates and is connected with the second grade pendulum rod, and the second grade pendulum rod rotates with the swinging arms damping and is connected. When the landing device lands, the swinging rod of the primary damping assembly and the secondary swinging rod swing outwards, the first damping part absorbs impact caused by vibration in the process, and the impact can be absorbed through the damping rotating connection between the secondary swinging rod and the swinging rod; the guide rod can stretch the second damping part synchronously, the second damping part absorbs shock and absorbs energy, the rack drives the second-stage damping assembly to work, the sliding plate slides in a damping mode with the sleeve, the inflatable airbag is inflated, and the second-stage damping assembly can absorb shock.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicles, in particular to a shock-proof unmanned aerial vehicle undercarriage.
Background
An unmanned aircraft, referred to as "drone", is an unmanned aircraft that is operated by a radio remote control device and a self-contained program control device, or is operated autonomously, either completely or intermittently, by an onboard computer.
Drones tend to be more suitable for tasks that are too "fool, dirty, or dangerous" than are manned aircraft. Unmanned aerial vehicles can be classified into military and civil applications according to the application field. For military use, unmanned aerial vehicles divide into reconnaissance aircraft and target drone. In the civil aspect, the unmanned aerial vehicle and the industrial application are really just needed by the unmanned aerial vehicle; at present, the unmanned aerial vehicle is applied to the fields of aerial photography, agriculture, plant protection, miniature self-timer, express transportation, disaster relief, wild animal observation, infectious disease monitoring, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting, romantic manufacturing and the like, the application of the unmanned aerial vehicle is greatly expanded, and developed countries actively expand industrial application and develop unmanned aerial vehicle technology.
Unmanned aerial vehicle's undercarriage is the important subassembly of guarantee unmanned aerial vehicle safety descending, and its shock attenuation effect direct relation is enough to realize stably descending to unmanned aerial vehicle whether safety descending, and traditional unmanned aerial vehicle's undercarriage is many comparatively simple, all normal times at unmanned aerial vehicle, but when unmanned aerial vehicle out of control, will produce great impact force with the ground contact time, and traditional undercarriage can't satisfy the shock attenuation demand. To this end, a person skilled in the art proposes a suspension unmanned landing gear to solve the problems set out in the background above.
Disclosure of Invention
The invention aims to provide a shock-proof unmanned aerial vehicle undercarriage to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a shock-absorbing unmanned aerial vehicle undercarriage comprises a shock-absorbing mounting frame fixed to the bottom of an unmanned aerial vehicle body, wherein a primary shock-absorbing assembly is arranged at the bottom of the shock-absorbing mounting frame and comprises swing rods which are bilaterally symmetrical and rotatably connected with the shock-absorbing mounting frame, and a first shock-absorbing piece is fixedly connected between the outer side of each swing rod and the shock-absorbing mounting frame; the one end that the unmanned aerial vehicle organism was kept away from to the swinging arms rotates and is connected with the second grade pendulum rod, and the second grade pendulum rod rotates with the swinging arms damping and is connected.
As a further scheme of the invention: and the secondary oscillating rod is fixedly connected with a damping block, the oscillating rod is provided with a through hole, and the damping block is matched with the through hole.
As a still further scheme of the invention: all rotate between the second grade pendulum rod and be connected with the guide bar, the guide bar other end all with uide bushing sliding connection, two be connected with the second shock attenuation piece between the guide bar.
As a still further scheme of the invention: shock attenuation mounting bracket below fixedly connected with second grade damper assembly, second grade damper assembly include with the relative fixed connection's of shock attenuation mounting bracket sleeve pipe, sliding connection has the slide in the sleeve pipe, slide middle part threaded connection has drive screw, is connected through the transmission of drive assembly between drive screw and the uide bushing, and the sleeve pipe outer end is used for absorbing inflatable airbag through connecting pipe fixedly connected with.
As a still further scheme of the invention: the slide plate is connected with the sleeve in a damping sliding mode.
As a still further scheme of the invention: and the two secondary damping assemblies are symmetrically fixed below the damping mounting frame.
As a still further scheme of the invention: the transmission assembly comprises a rack fixedly connected with the guide sleeve and a gear meshed with the rack, and the end part of the driving screw rod positioned on the outer side is fixedly connected with the gear.
As a still further scheme of the invention: the sleeve is fixedly connected with the shock absorption mounting frame through the mounting connection frame.
As a still further scheme of the invention: the first damping piece is a spring or a plate spring, and the second damping piece is a spring or an elastic rope.
As a still further scheme of the invention: and the bottom of the secondary oscillating bar is fixedly connected with a wear-resistant support rod.
Compared with the prior art, the invention has the beneficial effects that: the damping mounting frame is simple in structure and convenient to use, and when the damping mounting frame is used, the damping type take-off and landing can be realized by directly fixing the damping mounting frame at the bottoms of unmanned aerial vehicle bodies with different specifications; when the impact force is too big, the damping connection state of second grade pendulum rod and one-level pendulum rod disappears, the guide bar can stretch the second shock attenuation piece in step, the second shock attenuation piece then carries out the shock attenuation energy-absorbing, along with the swing of second grade pendulum rod in addition, rack upward movement, drive second grade damper work, drive screw rod wherein rotates, make slide and sleeve pipe damping slide, and aerify the gasbag, the homoenergetic plays the effect of absorbing vibrations, become last one guarantee after the gasbag restarts in addition, unmanned aerial vehicle impact force is too big, the gasbag aerifys back and ground contact, produce elastic deformation, unmanned aerial vehicle's safety has effectively been ensured and has been played and has landed, use experience is good, be worth promoting.
Drawings
FIG. 1 is a schematic view of a shock absorbing undercarriage for an unmanned aerial vehicle;
FIG. 2 is a schematic view, partially in section, of a secondary shock absorbing assembly in a shock absorbing undercarriage of an unmanned aerial vehicle;
FIG. 3 is a schematic view of a shock absorbing sway bar in an unmanned aerial vehicle landing gear;
FIG. 4 is a schematic structural view of a secondary swing link in a shock-absorbing undercarriage of an unmanned aerial vehicle;
in the figure: 1. a shock-absorbing mounting rack; 2. a primary damping assembly; 3. a swing lever; 4. a first damper; 5. a secondary swing rod; 6. a damping block; 7. a through hole; 8. a guide bar; 9. a guide sleeve; 10. a second damping member; 11. a secondary damping component; 12. a sleeve; 13. a connecting pipe; 14. a slide plate; 15. a drive screw; 16. an inflatable air bag; 17. a rack; 18. a gear; 19. mounting a connecting frame; 20. wear-resisting vaulting pole.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-4, a shock-absorbing landing gear of an unmanned aerial vehicle comprises a shock-absorbing mounting frame 1 fixed at the bottom of an unmanned aerial vehicle body, wherein a primary shock-absorbing assembly 2 is arranged at the bottom of the shock-absorbing mounting frame 1, the primary shock-absorbing assembly 2 comprises swing rods 3 which are bilaterally symmetrical and rotatably connected with the shock-absorbing mounting frame 1, and a first shock-absorbing piece 4 is fixedly connected between the outer side of each swing rod 3 and the shock-absorbing mounting frame 1; the one end that unmanned aerial vehicle organism was kept away from to swinging arms 3 rotates and is connected with second grade pendulum rod 5, and second grade pendulum rod 5 rotates with the damping of swinging arms 3 and is connected.
Unmanned aerial vehicle undercarriage installs in unmanned aerial vehicle organism below, it includes one-level damper 2 at least, swinging arms 3 among the one-level damper swings to the outside at unmanned aerial vehicle descending in-process and diverges, thereby make first damper 4 compressed, energy-absorbing just can be realized to first damper 4, spring or leaf spring can be selected to first damper 4, all can first damper 4 install when swinging arms 3 is inboard, then can be stretched, also can play the same energy-absorbing effect, then preferred spring or stretch cord when first damper 4 installs in the inboard, the leaf spring is because do not possess tensile ability and can not carry out the energy-absorbing.
When the downward impact force of the device is large, the secondary swing rod 5 is driven by the impact force to move relative to the swing rod 3, namely to rotate outwards. The secondary oscillating rod 5 is fixedly connected with a damping block 6, the oscillating rod 3 is provided with a through hole 7, and the damping block 6 is matched with the through hole 7. Through the damping motion between second grade pendulum rod 5 and the swinging arms 3, make and also can carry out the energy-absorbing in the rotation process, the embodiment that second grade pendulum rod 5 and swinging arms 3's swing adopted this embodiment to give is an preferred mode, second grade pendulum rod 5 can be connected with swinging arms 3 rotation, also can play better damping rotation through set up comparatively inseparable normal running fit mode at the hookup location, second grade pendulum rod 5 can be elastic hard rubber material with swinging arms 3's rotation connecting axle in addition, also can realize the operation of second grade pendulum rod 5 at the swing in-process energy-absorbing through extrusion fit.
In one embodiment, a guide rod 8 is rotatably connected between the two secondary swing rods 5, the other end of each guide rod 8 is slidably connected with a guide sleeve 9, and a second damping member 10 is connected between the two guide rods 8. In the process that the secondary swing rod 5 swings outwards, the end, close to the outside, of the guide rod 8 is stretched outwards, the second shock absorption piece 10 is stretched, and therefore energy absorption is conducted, and the second shock absorption piece 10 is a spring or an elastic rope and can play a good energy absorption role.
In one embodiment, a secondary damping assembly 11 is fixedly connected below the damping mounting frame 1, the secondary damping assembly 11 comprises a sleeve 12 fixedly connected with the damping mounting frame 1, a sliding plate 14 is slidably connected in the sleeve 12, a driving screw 15 is threadedly connected in the middle of the sliding plate 14, the driving screw 15 is in transmission connection with the guide sleeve 9 through a transmission assembly, and an inflatable air bag 16 for damping is fixedly connected at the outer end of the sleeve 12 through a connecting pipe 13. The secondary damping assembly 11 can absorb energy when the impact force of the device is further improved, the driving screw 15 is driven by the transmission assembly to rotate, so that the sliding plate 14 is driven to move inwards, the air flow can be blown into the inflatable air bag 16 after the sliding plate 14 moves, the inflatable air bag 16 needs to absorb energy when being expanded in the process, along with the expansion of the inflatable air bag 16, the device continues to move downwards to impact the ground, the inflatable air bag 16 can be in contact with the ground, the deformation is further generated under the extrusion effect, the injury is further reduced, when the inflatable air bag 16 is compressed, the air flow can attack the thread gap between the driving screw 15 and the sliding plate 14 and is discharged, and the probability that the inflatable air bag 16 is extruded and exploded is reduced.
In one embodiment, the skate 14 is in damped sliding engagement with the sleeve 12, and sufficient energy absorption is provided during outward sliding movement of the skate 14 when the skate 14 is in damped sliding engagement with the sleeve 12.
In one embodiment, two secondary damping assemblies 11 are symmetrically fixed below the damping mounting frame 1, and a specific arrangement structure of the secondary damping assemblies 11 is provided in this embodiment, and although one secondary damping assembly can also achieve a corresponding effect, the symmetrical arrangement can improve the stability of the device and avoid side turning.
In one embodiment, the transmission assembly comprises a rack 17 fixedly connected to the guide sleeve 9 and a gear 18 engaged with the rack 17, and the end of the drive screw 15 located at the outer side is fixedly connected to the gear 18. In this embodiment, a specific embodiment of the transmission assembly is shown, the driving screw 15 is driven by the gear 18 to rotate, and the rack 17 is driven by the guide sleeve 9 to move upwards, so as to drive the gear 18. While this embodiment shows an obvious and non-exclusive embodiment of the transmission assembly, the sleeve 12 is vertically arranged, the rack 17 is directly replaced by other rod pieces, and the sliding plate 14 is fixed at the end of the rod pieces, so that the same transmission function can be achieved.
In one embodiment, the sleeve 12 is fixedly connected to the shock mount 1 by a mounting bracket 19.
In one embodiment, the bottom of the secondary swing rod 5 is fixedly connected with a wear-resistant stay bar 20, the unmanned aerial vehicle contacts with the ground for multiple times in the taking-off and landing process, the stay bar made of wear-resistant materials is more durable, and metals such as iron and steel can be selected, and other wear-resistant materials such as polymer plastics can also be selected.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A shock-absorbing unmanned aerial vehicle undercarriage comprises a shock-absorbing mounting frame (1) fixed to the bottom of an unmanned aerial vehicle body, and is characterized in that a primary shock-absorbing assembly (2) is arranged at the bottom of the shock-absorbing mounting frame (1), the primary shock-absorbing assembly (2) comprises swing rods (3) which are bilaterally symmetrical and rotatably connected with the shock-absorbing mounting frame (1), and a first shock-absorbing piece (4) is fixedly connected between the outer side of each swing rod (3) and the shock-absorbing mounting frame (1); one end, far away from the unmanned aerial vehicle body, of the swinging rod (3) is rotatably connected with a secondary swinging rod (5), and the secondary swinging rod (5) is in damping rotating connection with the swinging rod (3); shock attenuation mounting bracket (1) below fixedly connected with second grade damper (11), second grade damper (11) include with shock attenuation mounting bracket (1) relative fixed connection's sleeve pipe (12), sliding connection has slide (14) in sleeve pipe (12), slide (14) middle part threaded connection has drive screw (15), be connected through the transmission of drive assembly between drive screw (15) and uide bushing (9), sleeve pipe (12) outer end is used for absorbing gas cell (16) through connecting pipe (13) fixedly connected with.
2. The shockproof unmanned aerial vehicle landing gear of claim 1, wherein the second-stage swing rod (5) is fixedly connected with a damping block (6), the swing rod (3) is provided with a through hole (7), and the damping block (6) is matched with the through hole (7).
3. The shockproof unmanned aerial vehicle landing gear according to claim 2, wherein guide rods (8) are rotatably connected between the second-stage swing rods (5), the other ends of the guide rods (8) are slidably connected with guide sleeves (9), and second shock absorbing parts (10) are connected between the two guide rods (8).
4. The cushioned unmanned aircraft landing gear of claim 1, wherein the sled (14) is in damped sliding engagement with the casing (12).
5. Shockproof unmanned aerial vehicle landing gear according to claim 1, wherein there are two secondary shock assemblies (11) fixed under the shock-absorbing mounting frame (1) in a symmetrical state.
6. A shock-absorbing undercarriage for an unmanned aerial vehicle according to claim 1 or 4 or 5, wherein the transmission assembly comprises a rack (17) fixedly connected to the guide sleeve (9) and a gear (18) engaging with the rack (17), and the end of the drive screw (15) located on the outer side is fixedly connected to the gear (18).
7. The cushioned unmanned aircraft landing gear of claim 6, wherein the bushing (12) is fixedly connected to the shock mount (1) by a mounting link (19).
8. A shock absorbing unmanned aerial vehicle landing gear according to claim 3, wherein the first shock absorbing member (4) is a spring or leaf spring and the second shock absorbing member (10) is a spring or bungee cord.
9. Shockproof unmanned aerial vehicle landing gear according to claim 1, wherein a wear-resistant stay (20) is fixedly connected to the bottom of the secondary swing link (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828242.XA CN113277074B (en) | 2021-07-22 | 2021-07-22 | Unmanned aerial vehicle undercarriage of moving away to avoid possible earthquakes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110828242.XA CN113277074B (en) | 2021-07-22 | 2021-07-22 | Unmanned aerial vehicle undercarriage of moving away to avoid possible earthquakes |
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| CN113277074A CN113277074A (en) | 2021-08-20 |
| CN113277074B true CN113277074B (en) | 2021-10-08 |
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| CN202110828242.XA Active CN113277074B (en) | 2021-07-22 | 2021-07-22 | Unmanned aerial vehicle undercarriage of moving away to avoid possible earthquakes |
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| CN113928545A (en) * | 2021-11-23 | 2022-01-14 | 复旦大学 | Many rotor unmanned aerial vehicle with shock attenuation undercarriage structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3024551C2 (en) * | 1980-06-28 | 1986-10-16 | Autoflug Gmbh, 2084 Rellingen | Valve for an air-filled landing shock absorber |
| CN209192215U (en) * | 2018-11-01 | 2019-08-02 | 天津大学滨海工业研究院有限公司 | A kind of unmanned plane undercarriage of more rotors |
| CN109927888A (en) * | 2019-03-29 | 2019-06-25 | 芜湖市极星航空科技有限公司 | A kind of anti-crash unmanned plane |
| CN111532420A (en) * | 2020-06-08 | 2020-08-14 | 珠海市双捷科技有限公司 | UAV landing gear and UAV |
| CN111547254A (en) * | 2020-06-09 | 2020-08-18 | 安徽艺丘传媒科技有限公司 | Movie & TV is with clapping with unmanned aerial vehicle shock-absorbing structure |
| CN112078782B (en) * | 2020-09-28 | 2022-04-22 | 重庆工程职业技术学院 | Unmanned aerial vehicle shock-absorbing structure |
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