CN108341070B

CN108341070B - Bridge detection unmanned aerial vehicle undercarriage

Info

Publication number: CN108341070B
Application number: CN201810133693.XA
Authority: CN
Inventors: 刘芳平; 周逸; 苗秀鹏; 程龙飞; 刘路
Original assignee: Chongqing Three Gorges University
Current assignee: Chongqing Three Gorges University
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2021-04-20
Anticipated expiration: 2038-02-09
Also published as: CN108341070A

Abstract

The invention provides a bridge detection unmanned aerial vehicle undercarriage, and mainly relates to the field of unmanned aerial vehicles. The utility model provides a bridge detection unmanned aerial vehicle undercarriage, is including installing the crossbeam in the unmanned aerial vehicle bottom, the crossbeam bottom sets up the landing leg, the landing leg bottom sets up the contact plate, set up a plurality of grid holes on the contact plate, a bridge detection unmanned aerial vehicle undercarriage still includes the platform that rises and falls that suits with the contact plate, the platform that rises and falls includes the base, the base bottom sets up the wheelset, set up arresting gear on the wheelset, the base top sets up the crane, the crane top sets up the board that falls, the base front end sets up the haulage rope. The invention has the beneficial effects that: the bridge detection device has a buffering effect on the landing of the unmanned aerial vehicle, so that the landing difficulty of the unmanned aerial vehicle is reduced, the damage probability of the unmanned aerial vehicle is reduced, and the bridge detection operation of the unmanned aerial vehicle can be smoothly completed.

Description

Bridge detection unmanned aerial vehicle undercarriage

Technical Field

The invention mainly relates to the field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle undercarriage for bridge detection.

Background

Bridge is as the one kind of road, build the extension of the road on special topography, the bridge is divided according to the atress characteristics, there is beam bridge, arch bridge, rigid frame bridge, the suspension bridge, five basic types of combination system bridge (cable-stay bridge), different bridge has different atress types, in the use of bridge, need often overhaul the bridge, to the maintenance on bridge surface, whether the visible crackle of naked eye appears in the supplementary monitoring pontic of multipurpose unmanned aerial vehicle now, to longer bridge (viaduct, cross sea bridge etc.), need the sectionalized utilize unmanned aerial vehicle to carry out the bridge monitoring, this just needs to carry out many times repetition take off and land to unmanned aerial vehicle, unmanned aerial vehicle's casing is generally lighter, the accident of overturning takes place very easily in the in-process that unmanned aerial vehicle rises and falls:

the operation process degree of difficulty that unmanned aerial vehicle rose and fell is great, and unmanned aerial vehicle's speed is too high, can cause unmanned aerial vehicle to drop impairedly, and partial bridge section is the inclined plane, and unmanned aerial vehicle can't accomplish the descending, descends by force and can cause unmanned aerial vehicle to drop equally, and serious meeting influences unmanned aerial vehicle's take off once more, delays the detection progress of bridge.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the bridge detection unmanned aerial vehicle undercarriage which can provide a high-quality landing platform for the unmanned aerial vehicle, can play a role in buffering the landing of the unmanned aerial vehicle, reduces the landing difficulty of the unmanned aerial vehicle, reduces the damage probability of the unmanned aerial vehicle, and enables the unmanned aerial vehicle to smoothly complete bridge detection operation.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a bridge detection unmanned aerial vehicle undercarriage comprises two cross beams arranged at the bottom of an unmanned aerial vehicle, wherein the two cross beams are arranged in parallel at two sides of the bottom of the unmanned aerial vehicle, supporting legs are arranged at the bottoms of the two cross beams, the supporting legs incline towards the outer side direction of the unmanned aerial vehicle, the bottoms of the two supporting legs are respectively provided with a contact plate, the projection of the contact plates on the horizontal plane comprises the projection of the unmanned aerial vehicle on the horizontal plane, the contact plate is provided with a plurality of grid holes which are linearly and uniformly distributed on the contact plate, the landing gear of the bridge detection unmanned aerial vehicle also comprises a landing platform matched with the contact plate, the lifting platform comprises a base, the bottom of the base is provided with a wheel set, the wheel set is provided with a braking device, the lifting frame is arranged at the top of the base, the lifting plate is arranged at the top of the lifting frame and hinged to the lifting frame, and the traction rope is arranged at the front end of the base.

The contact plate edge part sets up the arc board, the arc board is extended to the top by the horizontal direction, set up a plurality of sand grips on the arc board bottom surface, it is a plurality of the sand grip all is perpendicular with the contact plate edge.

The landing leg includes shank and shank down, it is connected with horizontal pole fixed connection to go up shank top, shank bottom and contact plate fixed connection down, it sets up first spring beam to go up shank bottom center, first spring beam bottom and shank bottom surface central point put fixed connection down.

Set up the opening on the base bottom surface, set up the mounting panel in the base, set up the second spring beam between mounting panel and the base bottom surface, the mounting panel bottom sets up the action wheel, the top sets up the motor on the mounting panel, set up transmission between motor and the action wheel, set up the battery on the base lateral wall, the battery is connected with the motor wire, the polyphone switch between battery and the motor, set up the pivot on the base of mounting panel top, the pivot is connected with base lateral wall bearing, set up the handle hole corresponding with the pivot on the base lateral wall, pivot one end is passed the handle hole and is exposed outside the base, the handle hole is worn out in the pivot and is served and set up the turning handle, set up the locking device who suits with the turning handle on the base outer wall, set up the cam in the pivot, the cam contacts with the mounting panel.

The side edge of the landing plate is provided with a conical plate, and the height of the conical plate far away from the landing plate is larger than that of the conical plate close to the landing plate.

And a torsion spring is arranged between the rotating shaft and the operating hole.

The crane includes the grudging post, grudging post and base fixed connection, the grudging post top is articulated with the lifting plate, set up the sill bar with relative one side of grudging post on the base, set up the cavity in the sill bar, the sill bar side sets up the slot hole, slot hole one side sets up a plurality of side openings, set up the slide bar in the cavity, the slide bar side sets up the pin that suits with the slot hole, the slide bar top sets up the bulb, set up the slide that suits with the bulb on the lifting plate bottom surface.

Compared with the prior art, the invention has the beneficial effects that:

1. the contact plate is matched with the lifting platform, and the lifting plate at the top of the lifting platform is hinged with the lifting frame, so that a flat lifting platform can be provided for the unmanned aerial vehicle, the landing effect of the unmanned aerial vehicle can be buffered, the lifting difficulty of the unmanned aerial vehicle is reduced, the damage probability of the unmanned aerial vehicle is reduced, and the unmanned aerial vehicle can smoothly complete bridge detection operation.

2. According to the bridge detection device, the arc plates are arranged at the edge parts of the contact plates, the arc plates can buffer the landing of the unmanned aerial vehicle, the unmanned aerial vehicle is prevented from overturning when landing, the probability of damage of the unmanned aerial vehicle can be reduced, and the unmanned aerial vehicle can smoothly complete bridge detection operation.

3. According to the support leg, the impact of landing of the unmanned aerial vehicle can be buffered through the arrangement of the first spring rod, the probability of damage caused by falling of the unmanned aerial vehicle is reduced, and the unmanned aerial vehicle can smoothly complete bridge detection operation.

4. The motor is arranged in the base, the motor drives the driving wheel to rotate, and the lifting platform can be driven to move, so that the unmanned aerial vehicle can land at any place, the lifting difficulty of the unmanned aerial vehicle is reduced, and the probability of damage to the unmanned aerial vehicle caused by falling is reduced.

5. The side edge of the landing gear is provided with the conical plate, and the inclined angle of the conical plate can play a role in guiding the landing action of the unmanned aerial vehicle, so that the landing of the unmanned aerial vehicle is buffered, the landing difficulty of the unmanned aerial vehicle is reduced, and the probability of damage to the unmanned aerial vehicle caused by falling is reduced.

6. According to the invention, the torsion spring is arranged between the rotating shaft and the operating hole, and the torsion spring can enable the rotating shaft to automatically reset after being not bound by the locking device, so that the operation difficulty is reduced.

7, the angle of the lifting plate can be adjusted by sliding the sliding rod in the cavity of the bottom rod, so that the lifting platform can be kept horizontal on an inclined road surface, the lifting difficulty of the unmanned aerial vehicle is reduced, and the probability of damage caused by falling of the unmanned aerial vehicle during landing is reduced.

Drawings

FIG. 1 is a reference diagram illustrating the use of the present invention;

FIG. 2 is a schematic cross-sectional view of a front view of the base of the present invention;

FIG. 3 is a schematic sectional structure view of the crane of the present invention;

FIG. 4 is a schematic view of a cross beam, legs and contact plate in partial cross section according to the present invention.

Reference numerals shown in the drawings: 1. a cross beam; 2. a support leg; 3. a contact plate; 4. grid holes; 5. a landing platform; 6. a base; 7. a wheel set; 8. a braking device; 9. a lifting frame; 10. a lifting plate; 11. a hauling rope; 12. an arc plate; 13. a convex strip; 14. an upper leg portion; 15. a lower leg portion; 16. a first spring lever; 17. an opening; 18. mounting a plate; 19. a second spring lever; 20. a driving wheel; 21. a motor; 22. a transmission device; 23. a battery; 24. a switch; 25. a rotating shaft; 26. an operation hole; 27. a handle is rotated; 28. a locking device; 29. a cam; 30. a conical plate; 31. a torsion spring; 32. erecting a frame; 33. a bottom bar; 34. a cavity; 35. a long hole; 36. a side hole; 37. a slide bar; 38. a stop lever; 39. a ball head; 40. a slideway.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

As shown in fig. 1-4, the bridge detection unmanned aerial vehicle landing gear comprises two cross beams 1 installed at the bottom of an unmanned aerial vehicle, wherein the two cross beams 1 are arranged in parallel on two sides of the bottom of the unmanned aerial vehicle, supporting legs 2 are arranged at the bottoms of the two cross beams 1, the supporting legs 2 incline towards the outer side direction of the unmanned aerial vehicle, contact plates 3 are arranged at the bottoms of the two supporting legs 2, the projection of the contact plates 3 on the horizontal plane comprises the projection of the unmanned aerial vehicle on the horizontal plane, and the contact plates enable the contact area of the unmanned aerial vehicle during landing to be larger, so that the landing of the unmanned aerial vehicle is more stable. Set up a plurality of grid holes 4 on the contact plate 3, it is a plurality of grid hole 4 is linear evenly distributed on contact plate 3, the grid hole reduces the resistance that receives when making unmanned aerial vehicle lift flight, reduces unmanned aerial vehicle's flight loss, a bridge detection unmanned aerial vehicle undercarriage still includes landing gear 5 that suits with contact plate 3, landing gear 5 includes

base

6, 6 bottoms of base set up wheelset 7, set up arresting gear 8 on the

wheelset

7, 6 tops of base set up crane 9, crane 9 tops set up landing plate 10, landing plate 10 is articulated with crane 9, the angle with the crane can be adjusted to crane and landing plate, makes landing plate can guarantee the level, 6 front ends of base set up haulage rope 11, can supply unmanned aerial vehicle to go up and down with landing gear to the position that needs through the haulage rope. The take-off and landing plate at the top of the take-off and landing platform is hinged to the lifting frame, so that a smooth take-off and landing platform can be provided for the unmanned aerial vehicle, a buffering effect can be achieved on the landing of the unmanned aerial vehicle, the take-off and landing difficulty of the unmanned aerial vehicle is reduced, the damaged probability of the unmanned aerial vehicle is reduced, and the unmanned aerial vehicle can smoothly complete bridge detection operation.

In order to prevent that unmanned aerial vehicle from toppling when descending, 3 marginal portions of contact plate set up arc board 12, arc board 12 is extended to the top by the horizontal direction, set up a plurality of sand grips 13 on the 12 bottom surfaces of arc board, the sand grip can guide the impact force when unmanned aerial vehicle descends, and is a plurality of sand grip 13 all is perpendicular with 3 edges of contact plate. The arc board can play the buffering to unmanned aerial vehicle's descending, prevents that unmanned aerial vehicle from toppling when descending, can reduce the impaired probability of unmanned aerial vehicle, makes the completion bridge detection operation that unmanned aerial vehicle can be smooth.

In order to make unmanned aerial vehicle can be smooth completion bridge detection operation, landing leg 2 includes shank 14 and

lower shank

15, 14 tops of last shank and 1 fixed connection of horizontal pole, 15 bottoms of lower shanks and contact plate 3 fixed connection, 14 bottom centers of last shank set up

first spring beam

16, 16 bottoms of first spring beam and 15 bottom surfaces of lower shanks central point fixed connection. The impact that sets up of first spring beam can descend unmanned aerial vehicle obtains the buffering, reduces the impaired probability of unmanned aerial vehicle dropping, the completion bridge that makes unmanned aerial vehicle can be smooth detects the operation.

In order to reduce unmanned aerial vehicle's the degree of difficulty that rises and falls, set up opening 17 on the 6 bottom surfaces of base, set up mounting panel 18 in the base 6, set up second spring beam 19 between mounting panel 18 and the 6 bottom surfaces of base, 18 bottoms of mounting panel set up action wheel 20, the action wheel can pass the opening, the top sets up motor 21 on the mounting panel 18, set up transmission 22 between motor 21 and the action wheel 20, the motor can drive the action wheel through transmission and rotate to the platform rises and falls in the drive. Set up battery 23 on the 6 lateral walls of base, battery 23 is connected with motor 21 wire, polyphone switch 24 between battery 23 and the motor 21, set up pivot 25 on the base 6 of mounting panel 18 top, pivot 25 is connected with base 6 lateral wall bearing, set up the handle hole 26 corresponding with pivot 25 on the 6 lateral walls of base, pivot 25 one end is passed handle hole 26 and is exposed outside base 6, handle hole 26 is worn out to the pivot 25 and is served and set up turning handle 27, set up the locking device 28 that suits with turning handle 27 on the 6 outer wall of base, set up cam 29 on the pivot 25, cam 29 contacts with mounting panel 18 top surface, through turning handle drive cam, can extrude the opening with the action wheel of mounting panel bottom, make the action wheel can drive the operation of platform that rises and falls, make unmanned aerial vehicle can descend and rise and fall anywhere, reduce unmanned aerial vehicle's the degree of difficulty, the probability that the unmanned aerial vehicle is damaged when falling is reduced.

Furthermore, the side edge of the rising and falling plate 10 is provided with a conical plate 30, and the height of the conical plate 30 far away from the rising and falling plate 10 is greater than that of the conical plate 30 near the rising and falling plate 10. The angle of taper plate slope can play the guide effect to unmanned aerial vehicle's descending action, makes unmanned aerial vehicle's descending obtain the buffering, reduces unmanned aerial vehicle's the degree of difficulty that rises and falls, reduces unmanned aerial vehicle and falls impaired probability.

Furthermore, a torsion spring 31 is arranged between the rotating shaft 25 and the operating hole 26, and the torsion spring can enable the rotating shaft to automatically reset after being not bound by the locking device, so that the operating difficulty is reduced.

Further, the crane 9 includes the grudging post 32,

grudging post

32 and 6 fixed connection of base, grudging post 32 top is articulated with the landing plate 10, set up sill bar 33 with the relative one side of grudging post 32 on the base 6, set up cavity 34 in the sill bar 33, sill bar 33 side sets up slot hole 35, slot hole 35 one side sets up a plurality of side openings 36, set up slide bar 37 in the cavity 34, slide bar 37 side sets up the pin 38 that suits with slot hole 35, slide bar 37 top sets up bulb 39, set up the slide 40 that suits with bulb 39 on the landing plate 10 bottom surface. The slide bar slides in the cavity of sill bar, can adjust the angle of board that rises and falls, also can keep the level when making the platform that rises and falls on the inclined pavement, reduces unmanned aerial vehicle's the degree of difficulty that rises and falls, falls impaired probability when reducing unmanned aerial vehicle and descending.

The implementation mode is as follows:

when the unmanned aerial vehicle landing device is used, the landing platform 5 is pulled to a region, to be landed, of the unmanned aerial vehicle through the traction rope 11, the braking devices 8 on the wheel sets 7 at the bottom of the base 6 are locked, the landing platform 5 is fixed, the lifting frame 9 is adjusted, the landing plate 10 is kept horizontal, the unmanned aerial vehicle is remotely controlled to land on the landing plate 10 at the top of the landing platform 5, the contact plate 3 with the grid holes 4 is in contact with the landing plate 10, landing stability of the unmanned aerial vehicle can be improved, and the cross beam 1 is connected with the supporting legs 2 to support the unmanned aerial vehicle, so that the unmanned aerial vehicle can land more stably.

Example (b):

the utility model provides a bridge detection unmanned aerial vehicle undercarriage, is including installing crossbeam 1 in the unmanned aerial vehicle bottom, crossbeam 1 sets up two, two crossbeam 1 is in unmanned aerial vehicle bottom both sides parallel arrangement, crossbeam and unmanned aerial vehicle screw connection, two 1 bottoms of crossbeam all set up landing leg 2, landing leg 2 inclines to unmanned aerial vehicle outside direction, landing leg 2 includes shank 14 and lower shank 15, go up 14 tops of shank and 1 integrated into one piece of horizontal pole, 15 bottom screw connection contact plates 3 of lower shank, 3 marginal portions of contact plate set up arc board 12, arc board 12 is extended to the top by the horizontal direction, a plurality of sand grips 13 of integrated into one piece on 12 bottom surfaces of arc board, it is a plurality of sand grip 13 all is perpendicular with 3 edges of contact plate. Set up a plurality of grid holes 4 on the contact plate 3, it is a plurality of grid holes 4 are linear evenly distributed on contact plate 3, the projection of contact plate 3 on the horizontal plane contains the projection of unmanned aerial vehicle on the horizontal plane. The center of the bottom of the upper leg part 14 is in threaded connection with a first spring rod 16, and the bottom of the first spring rod 16 is in threaded connection with the center of the bottom surface of the lower leg part 15. The utility model provides a bridge detection unmanned aerial vehicle undercarriage still includes the platform 5 that rises and falls that suits with contact plate 3, platform 5 includes

base

6, 6 bottom installation wheelsets 7 of base, the wheelset is connected with base bearing through the pivot in this embodiment, set up arresting gear 8 on the wheelset 7, arresting gear is stopped for the dish in this embodiment. 6 top bolt fastening crane 9 of base, crane 9 includes grudging post 32,

grudging post

32 and 6 bolted connection of base, grudging post 32 top is articulated with lifter plate 10, with relative one side bolt fastening sill bar 33 of grudging post 32 on the base 6, set up cavity 34 in the sill bar 33, sill bar 33 side sets up slot hole 35, slot hole 35 one side sets up a plurality of side openings 36, set up slide bar 37 in the cavity 34, the slide bar can slide in the cavity, the pin 38 that slide bar 37 side welding and slot hole 35 suited, slide bar 37 top welding bulb 39, set up the slide 40 that suits with bulb 39 on the lifter plate 10 bottom surface, the bulb can slide in slide 40. The utility model discloses a lifting platform, including crane 9, lifting plate 10, conical plate 30, lifting plate 10, the height that highly is greater than near lifting plate 10 one side is kept away from lifting plate 10 one side, lifting plate 10 is articulated with crane 9, set up conical plate 30 on the lifting plate 10 side, conical plate and lifting plate can weld also can bolted connection, and bolted connection is adopted to this embodiment, conical plate 30. The front end of the base 6 is provided with a hauling rope 11, and the hauling rope is made of nylon in the embodiment. In this embodiment set up opening 17 on the 6 bottom surfaces of base, set up mounting panel 18 in the base 6, set up second spring beam 19 between mounting panel 18 and the 6 bottom surfaces of base, the second spring beam respectively with base bottom surface and mounting panel bottom surface bolt fastening, 18 bottom bolt fastening wheel seats of mounting panel, wheel seat upper bearing connects action wheel 20, top bolt fastening motor 21 on the mounting panel 18, the motor is brushless DC motor, set up transmission 22 between motor 21 and the action wheel 20, the key connection driving pulley on the motor shaft of motor in this embodiment, 20 epaxial key connections driven pulleys of action wheel, be connected with the conveyer belt between driving pulley and the driven pulleys. Bolt fastening battery 23 on the 6 lateral walls of base, the battery adopts 84V DC power supply in this embodiment, battery 23 and motor 21 wire are connected, establish ties switch 24 between battery 23 and the motor 21, set up pivot 25 on the base 6 of mounting panel 18 top, pivot 25 is connected with 6 lateral wall bearings of base, set up on the 6 lateral walls of base and pivot 25 corresponding handle hole 26, pivot 25 one end is passed handle hole 26 and is exposed outside 6 bases, set up torsional spring 31 between pivot 25 and the handle hole 26, the handle hole 26 is worn out in pivot 25 and is served and set up change handle 27, change handle and pivot can weld also can bolted connection, and bolted connection is adopted in this embodiment. And a locking device 28 matched with the rotating handle 27 is arranged on the outer wall of the base 6, and the locking device is a positioning pin inserted into a through hole on the side wall of the base. The shaft 25 is keyed to a cam 29, and the cam 29 contacts the top surface of the mounting plate 18. The beneficial effect of this embodiment lies in: this embodiment can provide a high-quality platform that rises and falls for unmanned aerial vehicle, can play the buffering effect to unmanned aerial vehicle's descending, makes unmanned aerial vehicle's the degree of difficulty that rises and falls reduce, reduces the impaired probability of unmanned aerial vehicle, makes the completion bridge detection operation that unmanned aerial vehicle can be smooth.

Claims

1. The utility model provides a bridge detection unmanned aerial vehicle undercarriage, is including installing crossbeam (1) in the unmanned aerial vehicle bottom, characterized by: the bridge detection unmanned aerial vehicle undercarriage is characterized in that the number of the cross beams (1) is two, the cross beams (1) are arranged on two sides of the bottom of an unmanned aerial vehicle in parallel, the bottom of each cross beam (1) is provided with a supporting leg (2), the supporting legs (2) incline towards the outer side of the unmanned aerial vehicle, the bottom of each supporting leg (2) is provided with a contact plate (3), the projection of each contact plate (3) on the horizontal plane comprises the projection of the unmanned aerial vehicle on the horizontal plane, the contact plates (3) are provided with a plurality of grid holes (4), the grid holes (4) are linearly and uniformly distributed on the contact plates (3), the edge parts of the contact plates (3) are provided with arc plates (12), the arc plates (12) extend upwards from the horizontal direction, the bottom surfaces of the arc plates (12) are provided with a plurality of raised strips (13), the raised strips (13) are all vertical to the edges of the contact plates (3), the bridge detection unmanned aerial, platform (5) rises and falls includes base (6), base (6) bottom sets up wheelset (7), set up arresting gear (8) on wheelset (7), base (6) top sets up crane (9), crane (9) top sets up board (10) that falls, it is articulated with crane (9) to rise board (10), the angle that board (10) and crane (9) fall can be adjusted in crane (9), makes it can guarantee the level to rise board (10), it sets up tapered plate (30) on board (10) side to rise, tapered plate (30) are kept away from and are highly greater than the height that is close to board (10) one side that falls, base (6) front end sets up haulage rope (11).

2. The bridge detection unmanned aerial vehicle undercarriage of claim 1, wherein: landing leg (2) are including last shank (14) and lower shank (15), go up shank (14) top and crossbeam (1) fixed connection, shank (15) bottom and contact plate (3) fixed connection down, it sets up first spring beam (16) to go up shank (14) bottom center, first spring beam (16) bottom and shank (15) bottom surface central point put fixed connection down.

3. The bridge detection unmanned aerial vehicle undercarriage of claim 1, wherein: the improved multifunctional spring rod is characterized in that an opening (17) is formed in the bottom surface of the base (6), a mounting plate (18) is arranged in the base (6), a second spring rod (19) is arranged between the mounting plate (18) and the bottom surface of the base (6), a driving wheel (20) is arranged at the bottom of the mounting plate (18), a motor (21) is arranged at the top of the mounting plate (18), a transmission device (22) is arranged between the motor (21) and the driving wheel (20), a battery (23) is arranged on the side wall of the base (6), the battery (23) is connected with a wire of the motor (21), a series switch (24) is connected between the battery (23) and the motor (21), a rotating shaft (25) is arranged on the base (6) above the mounting plate (18), the rotating shaft (25) is connected with a bearing on the side wall of the base (6), and an operating hole (26) corresponding to the rotating, pivot (25) one end is passed operation hole (26) and is exposed in base (6) outside, operation hole (26) are worn out in pivot (25) and serve and set up turning handle (27), set up locking device (28) that suit with turning handle (27) on base (6) outer wall, set up cam (29) on pivot (25), cam (29) contact with mounting panel (18) top surface.

4. The bridge detection unmanned aerial vehicle undercarriage of claim 3, wherein: and a torsion spring (31) is arranged between the rotating shaft (25) and the operating hole (26).

5. The bridge detection unmanned aerial vehicle undercarriage of claim 1, wherein: crane (9) are including grudging post (32), grudging post (32) and base (6) fixed connection, grudging post (32) top is articulated with deck (10) that rises, set up sill bar (33) with relative one side in grudging post (32) on base (6), set up cavity (34) in sill bar (33), sill bar (33) side sets up slot hole (35), slot hole (35) one side sets up a plurality of side openings (36), set up slide bar (37) in cavity (34), slide bar (37) side sets up pin (38) that suits with slot hole (35), slide bar (37) top sets up bulb (39), set up slide (40) that suit with bulb (39) on deck (10) bottom surface that rises.