CN116750233A - Foldable landing gear and unmanned aerial vehicle - Google Patents

Abstract

The invention discloses a foldable landing gear and an unmanned aerial vehicle. The foldable undercarriage comprises an undercarriage frame body and a plurality of foot frames, wherein the top ends of the foot frames are provided with hinge assemblies, the foot frames are arranged on the undercarriage frame body in a folding mode through the hinge assemblies, the hinge assemblies comprise fixing pieces and movable pieces, the fixing pieces are located on the undercarriage frame body, the movable pieces are located at the top ends of the foot frames, one ends of the movable pieces are hinged to the fixing pieces, the other ends of the movable pieces can be locked on the fixing pieces, the foot frames are carbon fiber foot frames, each foot frame comprises a supporting bottom and two supporting portions, and the two supporting portions are obliquely arranged and are connected to two ends of the supporting bottom through arc plates respectively; the unmanned aerial vehicle comprises the foldable landing gear. The invention is applied to the technical field of unmanned aerial vehicles.

Description

Foldable landing gear and unmanned aerial vehicle

Technical Field

The invention relates to the technical field of unmanned aerial vehicles, in particular to a foldable undercarriage and an unmanned aerial vehicle.

Background

The skid landing gear has the characteristics of simple structure, light weight and good terrain adaptability, and is a wide type of landing gear of a light unmanned aerial vehicle. The current skid landing gear is set to be a foldable landing gear based on the purposes of portability, easy transportation and small occupied space, for example, in a patent with an announcement number of CN206782056U, the skid landing gear discloses a portable unmanned aerial vehicle landing gear structure, and the landing gear can be folded towards the middle when the unmanned aerial vehicle is carried by the skid landing gear folding mechanism, and meanwhile, the short bottom rod can be folded. However, although the landing gear structure can be folded to reduce the occupied space of the unmanned aerial vehicle and is convenient to carry, the buffer performance of the whole structure is general, and the shock absorption effect is poor; in addition, the folded landing gear may inevitably wear out in contact with the ground when placed on the ground or during transport.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and the first aim is to provide the foldable undercarriage which has the advantages of small occupied space, better buffering performance, higher energy absorption efficiency, good damping effect, easy foot rest replacement and difficult abrasion in a folded state.

The second object of the invention is to provide the unmanned aerial vehicle which has small occupied space, better buffering performance, higher energy absorption efficiency, good damping effect, easy foot rest replacement and difficult abrasion in a folded state.

The technical scheme adopted by the invention is as follows: a collapsible undercarriage include undercarriage support body and a plurality of foot rest, the top of foot rest is provided with articulated assembly, the foot rest is in through articulated assembly folding setting on the undercarriage support body, articulated assembly includes mounting and moving part, the mounting is located on the undercarriage support body, the moving part is located the top of foot rest, the one end of moving part articulates on the mounting, the other end lockable of moving part is in on the mounting, the foot rest is the carbon fiber foot rest, the foot rest includes supporting bottom and two supporting parts, two the supporting part slope sets up, and is in through the arc setting respectively the both ends of supporting the bottom.

Further, the support bottom and/or the support portion is provided with a curved protrusion.

Further, the support base has an upwardly arched rectangular arch.

Further, the foot rest folding device further comprises a protection cushion block, the upper end of the protection cushion block is fixedly connected to the inside of the fixing piece, the lower end of the protection cushion block extends out of the bottom of the fixing piece, the lower end of the protection cushion block can be contained in the inside of the movable piece, the lower end of the protection cushion block can be in contact with the ground when the foot rest is folded, and the lower end of the protection cushion block is contained in the inside of the movable piece when the foot rest is unfolded.

Further, a protection gasket positioned below the movable piece is arranged on the foot rest, and the top end of the foot rest is positioned between the bottom of the movable piece and the top of the protection gasket.

Further, the number of the foot frames is two, two hinge assemblies are arranged at the top end of each foot frame, and a buffer layer is arranged on the bottom surface of each foot frame.

Further, a first limiting part is arranged on the fixing piece, a second limiting part matched with the first limiting part is arranged on the movable piece, and the second limiting part is abutted to the first limiting part when the foot rest is folded.

Further, one end of the movable piece is hinged to the fixed piece through a damping hinge pin, and the other end of the movable piece can be locked to the fixed piece through a lock pin.

Further, the lowest point position of the landing gear frame is lower than the lowest point position of the load.

The invention also provides an unmanned aerial vehicle which comprises the foldable landing gear.

The beneficial effects of the invention are as follows:

compared with the defects in the prior art, in the invention, the foot rest can be folded on the landing gear frame body through the hinge assembly, so that the occupied space is reduced to facilitate assembly and transportation, and the foot rest can be conveniently replaced when the foot rest is damaged, and the whole foot rest is not required to be disassembled; in addition, the foot rest is a carbon fiber foot rest, so that the buffer performance during landing can be improved, the energy absorption efficiency is higher, and the damping effect is good; the foldable landing gear has the advantages of small occupied space, better buffering performance, higher energy absorption efficiency, good damping effect and easiness in changing the foot rest.

The foldable landing gear has the advantages that the landing gear parts can be prevented from being worn by contact with the ground through the protection cushion blocks in the folded state, and the protection cushion blocks are contained in the movable part in the unfolded state, so that the whole structure is compact, and the foldable landing gear has the advantage of being not easy to wear in the folded state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a collapsible landing gear of the present invention;

FIG. 2 is a schematic perspective view of the collapsible landing gear of the present invention in an open position;

FIG. 3 is a schematic plan view of the foldable landing gear of the present invention in an open position;

FIG. 4 is an enlarged partial schematic view of portion A of FIG. 3;

FIG. 5 is a schematic perspective view of the collapsible landing gear of the present invention in a collapsed condition;

FIG. 6 is a schematic plan view of the foldable landing gear of the present invention in a folded condition;

FIG. 7 is a partially enlarged schematic illustration of portion B of FIG. 6;

FIG. 8 is a schematic plan view of a stand according to the present invention;

FIG. 9 is a schematic perspective view of a stand according to the present invention;

fig. 10 is a schematic perspective view of a stand according to the present invention.

The reference numerals are as follows:

1. a landing gear frame; 2. a foot rest; 3. a hinge assembly; 4. bending the protrusion; 5. a fixing member; 6. a movable member; 7. protecting the cushion block; 8. a protection gasket; 9. a support base; 10. a support part; 11. an arc-shaped plate; 12. rectangular arch parts; 13. a first limit part; 15. a second limit part; 16. damping the hinge pin; 17. a locking pin.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators in the embodiments of the present invention, such as up, down, left, right, front, rear, clockwise, counterclockwise, etc., are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.

As shown in fig. 1 to 7, in this embodiment, a foldable landing gear includes a landing gear frame body 1 and a plurality of foot frames 2, the top of the foot frames 2 is provided with a hinge assembly 3, the foot frames 2 are folded and arranged on the landing gear frame body 1 through the hinge assembly 3, the hinge assembly 3 includes a fixing piece 5 and a movable piece 6, the fixing piece 5 is located on the landing gear frame body 1, the movable piece 6 is located on the top of the foot frames 2, one end of the movable piece 6 is hinged on the fixing piece 5, the other end of the movable piece 6 can be locked on the fixing piece 5, the foot frames 2 are carbon fiber foot frames, the foot frames 2 include a support bottom 9 and two support portions 10, and the two support portions 10 are obliquely arranged and are respectively arranged at two ends of the support bottom 9 through arc plates 11.

It should be noted that the number of the foot frames 2 may be two, and the top end of each foot frame 2 may be provided with two hinge assemblies 3; the support bottom 9, the support part 10 and the arc plate 11 are integrally formed; the landing gear frame body 1 is made of a metal material and has higher strength, the foot rest 2 is made of a carbon fiber material, and the landing gear frame body 1 made of metal is combined with the foot rest 2 made of carbon fiber, so that even if the foot rest 2 is damaged in the descending process, the landing gear frame body 1 with better strength can still protect a machine body and a load.

Compared with the defects of the prior art, in the invention, the foot rest 2 can be folded on the landing gear frame body 1 through the hinge assembly 3, so that the occupied space is reduced to facilitate assembly and transportation, and the foot rest 2 can be conveniently replaced when the foot rest 2 is damaged, and the whole is not required to be disassembled; in addition, the foot rest 2 is arranged as a carbon fiber foot rest, so that the buffer performance during landing can be improved, the energy absorption efficiency is higher, and the damping effect is good; the foldable landing gear has the advantages of small occupied space, better buffering performance, higher energy absorption efficiency, good damping effect and easiness in changing the foot rest.

As shown in fig. 8 to 10, in some embodiments, the support base 9 and/or the support 10 are provided with curved protrusions 4. Specifically, the curved protrusion 4 on the support bottom 9 is located at the upper end surface thereof and inside thereof, and the curved protrusion 4 on the support portion 10 is located at the top end thereof. It should be noted that, the supporting bottom portion 9 and the supporting portion 10 are both provided with the bending protrusions 4 to have the best technical effect, so that the supporting bottom portion 9 and the supporting portion 10 both form a variable section, and the local rigidity of the foot rest 2 is improved. The arc-shaped plate 11 forms a constant section and is perpendicular to the side surface of the machine body, the rigidity of the part is lower than that of the support bottom 9 and the support part 10, the bending deformation is maximum when the unmanned aerial vehicle lands, and the buffering and shock absorbing performance of the foot rest is improved.

It is worth mentioning that, because the bending rigidity of the section with equal section is lower than that of other sections with variable section, the bending deformation of the area is maximum, and more down-pressing impact capability can be absorbed, so that the aircraft meets the working condition when landing. Meanwhile, the arrangement of the bending bulges 4 can give consideration to the appearance, and simultaneously, energy transmission and release are provided for bending deformation of the constant section, so that the foot rest 2 is tilted. Therefore, the reinforcing ribs are formed through the local variable section, so that the deformation direction of the foot rest is controlled, and the landing stability of the body is ensured. Meanwhile, due to the symmetrical design, the universality of the foot rest is higher, and the difficulty of the composite material process is reduced.

In some embodiments, as shown in fig. 1, the support base 9 has an upwardly arched rectangular arch 12. Specifically, the support bottom 9 is provided with the rectangular arched part 12 arched upwards, so that the foot rest 2 has good mechanical properties, and the foot rest 2 is convenient to be stressed and expanded, and energy absorption and shock absorption are realized when the unmanned aerial vehicle descends.

As shown in fig. 7, in some embodiments, the stand further includes a protection cushion 7, an upper end of the protection cushion 7 is fixedly connected to the inside of the fixing member 5, a lower end of the protection cushion 7 extends out of the bottom of the fixing member 5, a lower end of the protection cushion 7 may be received in the inside of the movable member 6, the lower end of the protection cushion 7 may contact with the ground when the stand 2 is folded, and a lower end of the protection cushion 7 is received in the inside of the movable member 6 when the stand 2 is opened.

Compared with the defects in the prior art, in the invention, the protection cushion block 7 can be stored in the movable piece 6 when the unmanned aerial vehicle is in the open state, so that the occupied space is not increased, and the whole structure is compact; the protection cushion block 7 can be used for contacting with the ground when the unmanned aerial vehicle is in a folded state, so that the landing gear parts are prevented from contacting with the ground and wearing, therefore, the protection cushion block 7 can be used for preventing the landing gear parts from contacting with the ground and wearing when the unmanned aerial vehicle is in the folded state, and the protection cushion block 7 is stored in the movable part 6 in the unfolded state, so that the whole structure is compact, and the foldable landing gear has the advantage of being not easy to wear when in the folded state.

As shown in fig. 5 and 7, in some embodiments, the stand 2 is provided with a protection gasket 8 below the movable member 6, and the top end of the stand 2 is located between the bottom of the movable member 6 and the top of the protection gasket 8; the bottom surface of the foot rest 2 is provided with a buffer layer. Specifically, the top end of the foot rest 2 is fixedly connected to the bottom of the movable piece 6 through a screw by the protection gasket 8, and the protection gasket 8 is used for realizing integral energy absorption and shock absorption on one hand and protecting the hinge assembly 3 from impact damage in the descending process on the other hand; in addition, the bottom of the foot rest 2 can be prevented from being worn by the ground through the buffer layer arranged on the bottom surface of the foot rest 2.

As shown in fig. 1 and 7, in some embodiments, the fixing member 5 is provided with a first limiting portion 13, the moving member 6 is provided with a second limiting portion 15 that is matched with the first limiting portion 13, and the second limiting portion 15 abuts against the first limiting portion 13 when the stand 2 is folded. Specifically, the first limiting portion 13 and the second limiting portion 15 are both limiting planes, and the second limiting portion 15 abuts against the first limiting portion 13 when the foot rest 2 is folded to the corresponding position, so that the folding travel of the foot rest 2 is limited, and the situation that the foot rest 2 collides with the machine body is avoided.

As shown in fig. 4, in some embodiments, one end of the movable member 6 is hinged to the fixed member 5 by a damped hinge pin 16; the other end of the movable member 6 is lockable to the fixed member 5 by a lock pin 17. Specifically, one end of the movable piece 6 rotates through the damping hinge pin 16, so that the condition that the foot rest 2 slides downwards when rotating upwards to fold can be avoided; after the foot rest 2 is fully opened, the movable member 6 can be locked to the fixed member 5 by the locking pin 17.

As shown in fig. 2 and 5, in some embodiments, the lowest point position of the landing gear frame 1 is lower than the lowest point position of the load. Specifically, when the foldable landing gear is mounted on an unmanned aerial vehicle, since the lowest point position of the landing gear frame body 1 is lower than the lowest point position of the load (front side four light pods), the load can be prevented from contacting the ground when the foot stand 2 is folded, and thus the situation that the load is worn out can be avoided.

The invention also provides an unmanned aerial vehicle which comprises the foldable landing gear. The specific structure of the unmanned aerial vehicle refers to the above embodiments, and since the unmanned aerial vehicle adopts all the technical solutions of all the embodiments, the unmanned aerial vehicle has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A collapsible landing gear, characterized in that: the novel landing gear comprises a landing gear frame body (1) and a plurality of foot frames (2), wherein the top ends of the foot frames (2) are provided with hinge assemblies (3), the foot frames (2) are folded and arranged on the landing gear frame body (1) through the hinge assemblies (3), the hinge assemblies (3) comprise fixing pieces (5) and movable pieces (6), the fixing pieces (5) are located on the landing gear frame body (1), the movable pieces (6) are located at the top ends of the foot frames (2), one ends of the movable pieces (6) are hinged to the fixing pieces (5), the other ends of the movable pieces (6) can be locked on the fixing pieces (5), the foot frames (2) are carbon fiber foot frames, the foot frames (2) comprise a supporting bottom (9) and two supporting portions (10), and the two supporting portions (10) are obliquely arranged and are respectively arranged at two ends of the supporting bottom (9) through arc-shaped plates (11).

2. A collapsible landing gear according to claim 1, wherein: the support bottom (9) and/or the support part (10) are provided with curved protrusions (4).

3. A collapsible landing gear according to claim 2, wherein: the support base (9) has an upwardly arched rectangular arch (12).

4. A collapsible landing gear according to any one of claims 1 to 3, wherein: still include protection cushion (7), the upper end fixed connection of protection cushion (7) is in the inside of mounting (5), the lower extreme of protection cushion (7) stretch out in the bottom of mounting (5), the lower extreme of protection cushion (7) can accomodate in the inside of moving part (6), the lower extreme of protection cushion (7) is in can contact with ground when foot rest (2) are folding, the lower extreme of protection cushion (7) is in accomodate when foot rest (2) are opened the inside of moving part (6).

5. A collapsible landing gear according to claim 1, wherein: the foot rest (2) is provided with a protection gasket (8) positioned below the movable piece (6), and the top end of the foot rest (2) is positioned between the bottom of the movable piece (6) and the top of the protection gasket (8).

6. A collapsible landing gear as claimed in claim 5 wherein: the two foot frames (2) are arranged, two hinge assemblies (3) are arranged at the top end of each foot frame (2), and a buffer layer is arranged on the bottom surface of each foot frame (2).

7. A collapsible landing gear according to claim 1, wherein: the fixing piece (5) is provided with a first limiting part (13), the movable piece (6) is provided with a second limiting part (15) matched with the first limiting part (13), and the second limiting part (15) is abutted to the first limiting part (13) when the foot rest (2) is folded.

8. A collapsible landing gear according to claim 1, wherein: one end of the movable piece (6) is hinged on the fixed piece (5) through a damping hinge pin (16), and the other end of the movable piece (6) can be locked on the fixed piece (5) through a lock pin (17).

9. A collapsible landing gear according to claim 1, wherein: the lowest point position of the landing gear frame body (1) is lower than the lowest point position of the load.

10. An unmanned aerial vehicle, its characterized in that: a collapsible landing gear comprising a collapsible landing gear according to any one of claims 1 to 9.