Automatic retractable undercarriage of unmanned aerial vehicle and unmanned aerial vehicle

Abstract

The utility model discloses an unmanned aerial vehicle automatic retractable undercarriage and an unmanned aerial vehicle, and relates to the technical field of aircrafts, the technical scheme is as follows: the unmanned aerial vehicle automatic retractable undercarriage comprises an undercarriage mounting seat, an undercarriage is hinged on the undercarriage mounting seat, and an automatic retractable device is arranged between the undercarriage and the undercarriage mounting seat. The landing gear is hinged to the landing gear mounting seat, and the automatic folding and unfolding device is arranged between the landing gear and the landing gear mounting seat, so that the whole automatic folding and unfolding landing gear of the unmanned aerial vehicle can be automatically folded and unfolded, and the landing gear can be controlled to be folded when the unmanned aerial vehicle executes a flight task; and meanwhile, the landing gear can be retracted to reduce aerodynamic resistance, long-endurance flight is facilitated, and on the ground, the landing gear is retracted to be more convenient to store.

Description

TECHNICAL FIELD

[0001] The utility model discloses a kind of unmanned aerial vehicle automatic retraction landing gears and unmanned aerial vehicles, and it relates to the technical field of aircraft. BACKGROUND

[0002] At present, unmanned aerial vehicle has been widely used in geographic topography surveying, survey, power inspection, tactical investigation, target positioning, target damage assessment, electronic countermeasure, communication relay and many other fields.

[0003] Traditional unmanned aerial vehicle landing gear adopts fixed structure, and plays a stable supporting role during take-off and landing stage. During flight, the landing gear is fixed outside the fuselage, which has a negative impact on the external task load space and field of view. At the same time, the external landing gear increases the aerodynamic drag, which is not conducive to long-haul flight. On the ground, it is inconvenient to store.

[0004] In the prior art, some technical solutions for folding and storing aircraft landing gear are also proposed. Chinese invention patent (CN104943855A) discloses an unmanned aerial vehicle landing gear and an unmanned aerial vehicle having the same. One end of the unmanned aerial vehicle landing gear is hinged to the fuselage of the unmanned aerial vehicle, so that the unmanned aerial vehicle landing gear can rotate relative to the fuselage. The unmanned aerial vehicle landing gear has a use position and a retracted position. In the use position, the unmanned aerial vehicle landing gear is used for take-off and landing of the unmanned aerial vehicle. In the retracted position, the unmanned aerial vehicle landing gear is folded onto the fuselage. Thus, the unmanned aerial vehicle landing gear can at least partially adhere to the fuselage, thereby reducing the space occupied by the unmanned aerial vehicle landing gear when it is retracted. However, although the unmanned aerial vehicle landing gear considers adhesion to the fuselage, it cannot realize automatic retraction and deployment, and the adhesion arrangement has limitations.

[0005] For the retraction and deployment function of the landing gear, Chinese invention patent (CN115973476B) discloses a rotating unmanned aerial vehicle landing gear that can be retracted and deployed in real time. The landing gear includes a landing gear assembly and an auxiliary landing module. The top surface of the landing gear housing is used to connect the bottom of the unmanned aerial vehicle body. The landing gear retraction and deployment drive device is used to drive a group of landing gears to complete the retraction and deployment action synchronously. The auxiliary landing module includes a group of distance sensors, a motor driver and a control chip. The motor driver controls the execution action of the landing gear retraction and deployment drive device to adjust the opening angle of the group of landing gears, thereby meeting the flatness requirement of the landing position. However, although the landing gear considers the retraction and deployment function, its use scenario is single, and the transmission motor is stressed, which reduces the reliability.

[0006] Another Chinese invention patent (CN114408165B) discloses a connecting rod mechanism and an undercarriage and an aircraft comprising the connecting rod mechanism, the connecting rod mechanism has an extended state and a retracted state, the driving shaft is driven by the driving assembly to rotate bidirectionally to drive the connecting rod mechanism to switch between the extended state and the retracted state; the lock is driven by the driving shaft to lock the connecting rod mechanism in the retracted state and unlock the connecting rod mechanism in a state other than the retracted state. However, although the connecting rod mechanism also considers the folding and unfolding function, it still has the disadvantages of complex mechanism, low reliability and large space occupation.

[0007] Therefore, the utility model aims at providing an unmanned aerial vehicle automatic folding and unfolding undercarriage and unmanned aerial vehicle to solve the above problems. Utility model content

[0008] The utility model discloses a kind of unmanned aerial vehicle automatic folding and unfolding undercarriage and unmanned aerial vehicle, the utility model is hinged with undercarriage on undercarriage mounting seat, automatically folding and unfolding device is provided between undercarriage and undercarriage mounting seat, so that entire unmanned aerial vehicle automatic folding and unfolding undercarriage can be automatically folded and unfolded, when unmanned aerial vehicle executes flight task, undercarriage can be controlled to be retracted, avoid to produce negative influence to external hanging task load space and field of vision, simultaneously, undercarriage retraction can reduce aerodynamic drag, be conducive to long-haul flight, on ground, retracting undercarriage is more convenient to store.

[0009] The utility model is realized, a kind of unmanned aerial vehicle automatic folding and unfolding undercarriage and unmanned aerial vehicle, including undercarriage mounting seat, the undercarriage mounting seat is hinged with undercarriage, automatically folding and unfolding device is equipped between undercarriage and undercarriage mounting seat.

[0010] By adopting the above technical scheme, undercarriage is hinged on undercarriage mounting seat, automatically folding and unfolding device is provided between undercarriage and undercarriage mounting seat, so that entire unmanned aerial vehicle automatic folding and unfolding undercarriage can be automatically folded and unfolded, when unmanned aerial vehicle executes flight task, undercarriage can be controlled to be retracted, avoid to produce negative influence to external hanging task load space and field of vision, simultaneously, undercarriage retraction can reduce aerodynamic drag, be conducive to long-haul flight, on ground, retracting undercarriage is more convenient to store.

[0011] Further, the automatically folding and unfolding device includes electric push rod and pin shaft two, one end of the electric push rod is connected with the undercarriage mounting seat, the other end of the electric push rod is connected with the pin shaft two, the end of the undercarriage close to the undercarriage mounting seat is equipped with pin shaft sliding slot, the pin shaft two is located in the pin shaft sliding slot and slides.

[0012] By adopting the technical scheme, one end of the electric push rod is connected with the landing gear mounting seat, the other end of the electric push rod is connected with the pin shaft two, the end of the landing gear close to the landing gear mounting seat is provided with a pin shaft sliding groove, and the pin shaft two is slidably arranged in the pin shaft sliding groove, so that the electric push rod can control the folding and unfolding of the landing gear, and the folding and unfolding function of the automatic folding and unfolding of the entire unmanned aerial vehicle can be automatically controlled by controlling the electric push rod.

[0013] Further, the landing gear mounting seat is provided with a rotating shaft, the landing gear is hinged with the landing gear mounting seat through the rotating shaft, and an elastic tensioning member is arranged between the rotating shaft and the pin shaft two.

[0014] By adopting the technical scheme, the rotating shaft is arranged on the mounting seat, the landing gear is hinged with the landing gear mounting seat through the rotating shaft, and the elastic tensioning member is arranged between the rotating shaft and the pin shaft two, so that the elastic assembly can exert a pulling force on the pin shaft two to ensure that the landing gear is in the standard position of folding and unfolding, and the automatic folding and unfolding of the entire unmanned aerial vehicle can be more smooth during the folding and unfolding process.

[0015] Further, the elastic assembly adopts a rubber ring, and the number of the rubber rings is two.

[0016] By adopting the technical scheme, the elastic assembly adopts a rubber ring, and the number of the rubber rings is two, and the two rubber rings are symmetrically arranged on the two sides of the electric push rod, so that the stability of the automatic folding and unfolding of the entire unmanned aerial vehicle during the folding and unfolding process can be maintained.

[0017] Further, the landing gear mounting seat is provided with a folding fixing hook, and the landing gear is provided with an unfolding fixing hook.

[0018] By adopting the technical scheme, the folding fixing hook is arranged on the landing gear mounting seat, and the unfolding fixing hook is arranged on the landing gear, so that the folding fixing hook can lock the automatic folding and unfolding of the unmanned aerial vehicle during folding, to avoid shaking of the automatic folding and unfolding of the unmanned aerial vehicle during flight, and the unfolding fixing hook can lock the automatic folding and unfolding of the unmanned aerial vehicle during unfolding, to better support the unmanned aerial vehicle.

[0019] Further, the number of the folding fixing hooks is two and they are symmetrically arranged on the landing gear mounting seat, and the number of the unfolding fixing hooks is two and they are symmetrically arranged on the landing gear.

[0020] By adopting the technical scheme, the number of the folding fixing hooks is two and they are symmetrically arranged on the landing gear mounting seat, and the number of the unfolding fixing hooks is two and they are symmetrically arranged on the landing gear, so that the two symmetrically arranged folding fixing hooks and unfolding fixing hooks can further improve the stability of the automatic folding and unfolding of the unmanned aerial vehicle during the folding and unfolding process.

[0021] Further, the landing gear mounting seat is provided with an ear piece, the number of the ear piece is two and the ear piece is symmetrically mounted on the landing gear mounting seat, a pin shaft one is arranged between the two ear pieces, the landing gear mounting seat is provided with a through groove, and the electric push rod is connected with the pin shaft one through the through groove.

[0022] By adopting the above technical scheme, the landing gear mounting seat is provided with an ear piece, the number of the ear piece is two and the ear piece is symmetrically mounted on the landing gear mounting seat, a pin shaft one is arranged between the two ear pieces, the landing gear mounting seat is provided with a through groove, and the electric push rod is connected with the pin shaft one through the through groove, so that the landing gear can be closely attached to the landing gear mounting seat after being retracted, and the volume of the entire unmanned aerial vehicle automatic folding and unfolding landing gear is reduced.

[0023] The utility model also provides an unmanned aerial vehicle, the unmanned aerial vehicle includes unmanned aerial vehicle body, external load and unmanned aerial vehicle automatic folding and unfolding landing gear, the bottom of unmanned aerial vehicle body is equipped with recess, the automatic folding and unfolding landing gear is installed in recess, the bottom of external load and unmanned aerial vehicle body is connected.

[0024] By adopting the above technical scheme, the bottom of the unmanned aerial vehicle body is provided with a recess, and the unmanned aerial vehicle automatic folding and unfolding landing gear is installed in the recess, so that the landing gear can be retracted in the recess when the unmanned aerial vehicle performs a flight task, thereby avoiding negative effects on the external task load space and field of view, and the landing gear retracted in the recess can reduce aerodynamic drag and energy consumption of the unmanned aerial vehicle.

[0025] Further, the number of the automatic folding and unfolding landing gears is at least one.

[0026] By adopting the above technical scheme, the number of the automatic folding and unfolding landing gears is at least one, and the automatic folding and unfolding landing gears can be installed in a front three-point type, rear three-point type or left-right symmetric four-point type mode according to actual conditions.

[0027] Further, the number of the automatic folding and unfolding landing gears is three, and the automatic folding and unfolding landing gears are fixedly installed in a three-point type at the bottom of the unmanned aerial vehicle body.

[0028] By adopting the above technical scheme, the number of the automatic folding and unfolding landing gears is three, and the automatic folding and unfolding landing gears are fixedly installed in a three-point type at the bottom of the unmanned aerial vehicle body, so that the weight of the entire unmanned aerial vehicle can be reduced, and the energy consumption of the unmanned aerial vehicle can be further reduced, compared with a left-right symmetric four-point type installation method.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] 1、 the utility model discloses a landing gear is hinged on the landing gear mounting seat, and an automatic folding and unfolding device is arranged between the landing gear and the landing gear mounting seat, thereby solving the problem that the landing gear of the existing unmanned aerial vehicle cannot be automatically folded and unfolded, and simultaneously having the advantages of high reliability, light weight and simple structure.

[0031] 2. The utility model discloses a single landing gear is designed as an assembly, and the single landing gear assembly is only through a set of electric push rod to realize the unfolding locking and the folding locking of the landing gear, so that the utility model discloses simple structure, light weight, and the internal space volume of occupying the shell is small, and the layout and the installation of the landing gear are convenient.

[0032] 3. The utility model discloses a landing gear and shell are in shape, recess is designed on the shell, and the landing gear is completely hidden in the shell after folding, so that air resistance is reduced, and the landing gear is completely folded during flight, and the situation that the outside hanging load field of vision is shielded is avoided.

[0033] 4. The utility model discloses a landing gear unfolding is the stress of unmanned aerial vehicle take-off and landing, and only relies on the stress of mechanical connecting piece, and the electric push rod is not stressed, so that the utility model discloses high designability, high reliability, and the landing gear is folded on the ground when ending the flight task, and is more convenient to store and transport. DRAWINGS

[0034] Figure 1 It is the unfolding state schematic drawing of unmanned aerial vehicle of the utility model of installing automatic folding landing gear;

[0035] Figure 2 It is the folding state schematic drawing of unmanned aerial vehicle of the utility model of installing automatic folding landing gear;

[0036] Figure 3 It is the unfolding state schematic drawing of automatic folding landing gear of the utility model;

[0037] Figure 4 It is the locking and unlocking schematic drawing of automatic folding landing gear of the utility model after unfolding;

[0038] Figure 5 It is the process schematic drawing of automatic folding landing gear of the utility model and contracts;

[0039] Figure 6 It is the folding state schematic drawing of automatic folding landing gear of the utility model;

[0040] Figure 7 It is the locking and unlocking schematic drawing of automatic folding landing gear of the utility model after folding.

[0041] The reference signs involved in the above drawings are as follows: 100, unmanned aerial vehicle body;200, automatic folding landing gear;300, outside hanging load;101, recess;210, landing gear mounting seat;220, landing gear;230, electric push rod;240, pin shaft one;250, rotating shaft;260, pin shaft two;270, elastic stretching piece;211, lug;212, folding fixed hook;213, unfolding fixed hook;221, pin shaft sliding slot. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0043] The implementation of the utility model will be described in detail in combination with specific examples.

[0044] In the drawings of the embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0045] Referring to Figures 1-7 The preferred embodiment provided by the utility model is shown in the drawings.

[0046] An unmanned aerial vehicle automatic folding and unfolding landing gear, comprising a landing gear mounting seat 210, a landing gear 220 is hinged on the landing gear mounting seat 210, and an automatic folding and unfolding device is fixedly connected between the landing gear 220 and the landing gear mounting seat 210.

[0047] The automatic folding and unfolding device comprises an electric push rod 230 and a pin shaft two 260, the fixed end of the electric push rod 230 is connected with the landing gear mounting seat 210, the telescopic end of the electric push rod 230 is connected with the pin shaft two 260, the end of the landing gear 220 close to the landing gear mounting seat 210 is provided with a pin shaft sliding groove 221, and the pin shaft two 260 is installed in the pin shaft sliding groove 221 and slides.

[0048] A rotating shaft 250 is fixedly installed on the landing gear mounting seat 210, the landing gear 220 is hinged with the landing gear mounting seat 210 through the rotating shaft 250, and an elastic tensioning piece 270 is installed between the rotating shaft 250 and the pin shaft two 260, in the embodiment, the elastic assembly is specifically an elastic ring, and the number of the elastic ring is two, and the elastic rings are symmetrically installed on the two sides of the electric push rod 230.

[0049] The landing gear mounting seat 210 is fixedly installed with two retracting fixing hooks 212 symmetrically installed on the landing gear mounting seat 210, which are used to lock the automatic retractable landing gear 200 after the automatic retractable landing gear 200 is retracted, and the landing gear 220 is fixedly installed with two unfolding fixing hooks 213 symmetrically installed on the landing gear 220, which are used to lock the automatic retractable landing gear 200 after the automatic retractable landing gear 200 is unfolded, thereby maintaining the support stability of the whole unmanned aerial vehicle.

[0050] The landing gear mounting seat 210 is fixedly installed with two ear plates 211 symmetrically installed on the landing gear mounting seat 210, and a pin shaft 240 is installed between the two ear plates 211, the landing gear mounting seat 210 is provided with a through slot, and the electric push rod 230 is connected with the pin shaft 240 through the through slot, so that the landing gear 220 can be closely attached to the landing gear mounting seat 210 after being retracted, thereby reducing the volume of the whole unmanned aerial vehicle automatic retractable landing gear 200.

[0051] The application further discloses an unmanned aerial vehicle, which comprises an unmanned aerial vehicle body 100, an external load 300 and an unmanned aerial vehicle automatic retractable landing gear 200, the bottom of the unmanned aerial vehicle body 100 is provided with a groove 101 corresponding to the unmanned aerial vehicle automatic retractable landing gear 200, the unmanned aerial vehicle automatic retractable landing gear 200 is installed in the groove 101, the external load 300 is connected with the bottom of the unmanned aerial vehicle body 100, the number of the unmanned aerial vehicle automatic retractable landing gear 200 is at least one, if the number of the landing gear 200 is one, the landing gear 200 can be arranged at one of three points of the unmanned aerial vehicle in a three-point fixing mode, and other landing gears are fixed landing gears, if the number of the unmanned aerial vehicle automatic retractable landing gear 200 is two, the unmanned aerial vehicle automatic retractable landing gear 200 can be arranged at two points of the unmanned aerial vehicle in a three-point fixing mode or a four-point fixing mode, and other landing gears are fixed landing gears, in addition, the unmanned aerial vehicle automatic retractable landing gear 200 can also be arranged in a front three-point fixing mode, a rear three-point fixing mode or a left-right symmetric four-point fixing mode.

[0052] In the embodiment, the number of the fixedly installed unmanned aerial vehicle automatic retractable landing gear 200 is three, and the unmanned aerial vehicle automatic retractable landing gear 200 is arranged in a three-point fixing mode at the bottom of the unmanned aerial vehicle body 100.

[0053] Working principle: when the unmanned aerial vehicle starts to perform a flight task or the flight task is completed, the automatic retractable landing gear 200 needs to be opened for supporting the unmanned aerial vehicle, at this time the electric push rod 230 needs to be extended and unfolded, driving the landing gear 220 to rotate along the rotating shaft 250, so that the landing gear 220 is gradually unfolded, in this process the elastic tension member 270 is slightly stressed, so that the pin shaft two 260 approaches the rotating shaft 250, when the landing gear 220 contacts the bottom of the landing gear mounting seat 210, at this time the landing gear 220 does not rotate, the electric push rod 230 continues to extend and unfold, under the action of the thrust the pin shaft two slides in the pin shaft sliding groove 221, until the pin shaft two 260 moves into the unfolded fixed hook 213, the electric push rod 230 stops extending and unfolding, at this time the unfolding and locking of the unmanned aerial vehicle automatic retractable landing gear 200 are completed; when the unmanned aerial vehicle is in flight or the unmanned aerial vehicle is stored, the automatic retractable landing gear 200 needs to be retracted, at this time the electric push rod 230 needs to be retracted, driving the landing gear 220 to rotate along the rotating shaft 250, so that the landing gear 220 is gradually retracted, in this process the elastic tension member 270 is slightly stressed, so that the pin shaft two 260 approaches the rotating shaft 250, when the landing gear 220 contacts the top of the landing gear mounting seat 210, at this time the landing gear 220 does not rotate any more, the electric push rod 230 continues to retract, at this time under the action of the tension the pin shaft two 260 slides in the pin shaft sliding groove 221, until the pin shaft two 260 slides into the retracted fixed hook 212, the electric push rod 230 stops retracting, at this time the retracting and locking of the unmanned aerial vehicle automatic retractable landing gear 200 are completed.

[0054] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic retractable landing gear for a UAV, characterized in that: It includes a landing gear mounting seat, a landing gear is hinged on the landing gear mounting seat, and an automatic retraction device is provided between the landing gear and the landing gear mounting seat; The automatic retraction and extension device includes an electric push rod and a second pin shaft. One end of the electric push rod is connected to the landing gear mounting seat, and the other end of the electric push rod is connected to the second pin shaft. A pin shaft slide groove is provided at the end of the landing gear close to the landing gear mounting seat, and the second pin shaft slides in the pin shaft slide groove.

2. The automatic retractable landing gear of a UAV according to claim 1, characterized in that: A rotating shaft is provided on the landing gear mounting seat, and the landing gear is hinged to the landing gear mounting seat via the rotating shaft. An elastic stretching piece is provided between the rotating shaft and the second pin shaft.

3. The automatic retractable landing gear of a UAV according to claim 2, characterized in that: The elastic stretching member is a rubber ring, and the number of the rubber rings is 2.

4. The automatic retractable landing gear of a UAV according to claim 3, characterized in that: The landing gear mounting seat is provided with a stowage fixing hook, and the landing gear is provided with an deployment fixing hook.

5. The automatic retractable landing gear of a UAV according to claim 4, characterized in that: The number of the retracted fixing hooks is two and they are symmetrically mounted on the landing gear mounting seat, and the number of the deployed fixing hooks is two and they are symmetrically mounted on the landing gear.

6. The automatic retractable landing gear of a UAV according to claim 5, characterized in that: The landing gear mounting seat is provided with ear pieces, the number of the ear pieces is 2 and they are symmetrically mounted on the landing gear mounting seat, a pin shaft 1 is provided between the two ear pieces, a through slot is provided on the landing gear mounting seat, and the electric push rod passes through the through slot and is connected to the pin shaft 1.

7. A drone, characterized in that: The drone includes a drone body, an external load and the drone automatically retractable landing gear according to any one of claims 1 to 6, wherein a groove is provided at the bottom of the drone body, the automatically retractable landing gear is installed in the groove, and the external load is connected to the bottom of the drone body.

8. The drone according to claim 7, characterized in that: The number of the automatically retractable landing gear is at least one.

9. The drone according to claim 8, characterized in that: The number of the automatically retractable landing gear is 3, which are fixedly mounted on the bottom of the UAV body in a three-point manner.

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