CN109606654A

CN109606654A - A kind of fixed-wing unmanned plane with folding undercarriage

Info

Publication number: CN109606654A
Application number: CN201811510983.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Quanzhou Qimei Electronic Technology Co Ltd
Current assignee: Quanzhou Qimei Electronic Technology Co Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2019-04-12

Abstract

The invention belongs to unmanned plane fields, more particularly to it is a kind of with the fixed-wing unmanned plane for folding undercarriage, it includes landing gear mechanism after landing gear mechanism, second after body, nose-gear mechanism, first, folds driving mechanism, the 6th gear, driving gear, steering engine, and wherein steering engine passes sequentially through driving gear and the operation of the 6th gear Foldable driving mechanism；Fold that driving mechanism drives nose-gear mechanism, landing gear mechanism is run after landing gear mechanism and second after first, to realize after nose-gear mechanism, first stacking for landing gear mechanism after landing gear mechanism and second；When the nose-gear mechanism on unmanned plane when being contacted with ground, ground in face of nose-gear mechanism impact so that of short duration accelerations of preceding sliding wheel in nose-gear mechanism rotates so that unmanned plane will not because of preceding sliding wheel and rear sliding wheel speed it is inconsistent and overturning phenomenon occurs.

Description

A kind of fixed-wing unmanned plane with folding undercarriage

Technical field

The invention belongs to unmanned plane field more particularly to a kind of fixed-wing unmanned planes with folding undercarriage.

Background technique

The traditional undercarriage having the function of on the unmanned plane of undercarriage, which seldom has, at present stacks, without stacking function Windage of the unmanned plane of undercarriage in flight course is larger, to influence voyage and the speed of a ship or plane；Even if some unmanned planes have folded The undercarriage of playing function also increases research and development and the production cost of unmanned plane because of the complexity of the control mode of undercarriage；Tradition The unmanned plane with undercarriage on undercarriage control mode substantially have there are two types of: one is by Serve Motor Control pacify Loaded on the hydraulic pump on body, and then stacking by three undercarriages of hydraulic control；Another kind is by least two servos The folding of three undercarriages of motor control；This traditional undercarriage stacking mode similarly increases the research and development and life of unmanned plane Cost is produced, and undercarriage is relatively simple to the buffering method of ground shock, so that the progress that unmanned plane is widely used is influenced, And then influence the economic benefit of relevant enterprise.

The present invention design it is a kind of with fold undercarriage fixed-wing unmanned plane solve the problems, such as it is as above.

Summary of the invention

To solve drawbacks described above in the prior art, the present invention disclose it is a kind of with fold undercarriage fixed-wing nobody Machine, it adopts the following technical solutions to realize.

In the description of the present invention, it should be noted that the indicating positions such as term "inner", "lower", "upper" or position are closed System be orientation based on the figure perhaps positional relationship or the invention product using when the orientation or position usually put Set relationship, it is only for convenient for the description present invention and simplify description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed or operated with specific orientation, therefore be not considered as limiting the invention.In addition, art Language " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.

It is a kind of with fold undercarriage fixed-wing unmanned plane, it is characterised in that: it include body, nose-gear mechanism, Landing gear mechanism after landing gear mechanism, second after first folds driving mechanism, the 6th gear, driving gear, steering engine, wherein machine Body is existing fixed-wing unmanned plane body；Steering engine passes sequentially through driving gear and the 6th gear Foldable driving mechanism fortune Row；Landing gear mechanism is run after landing gear mechanism and second after folding driving mechanism drive nose-gear mechanism, first, thus real Landing gear mechanism stacks after landing gear mechanism and second after existing nose-gear mechanism, first.

After unmanned plane lift-off, steering engine, which passes sequentially through driving gear, the 6th gear and folds driving mechanism, drives nose-gear After mechanism, first after landing gear mechanism and second landing gear mechanism around corresponding arc ladder chute arc core axis to before body Top is swung, so that income body is packed up in landing gear mechanism folding after landing gear mechanism and second after nose-gear mechanism, first It is interior, to reduce the windage that unmanned plane is subject in flight course, and then improve unmanned plane during flying voyage and speed.

Before unmanned plane landing, landing gear mechanism after landing gear mechanism and second after steering engine drive nose-gear mechanism, first Arc core axis around corresponding arc ladder chute is swung to the body back lower place, so that undercarriage after nose-gear mechanism, first Landing gear mechanism is put down after mechanism and second, is ready for the landing of unmanned plane；When unmanned plane lands, on unmanned plane first Landing gear mechanism rises after landing gear mechanism and second after ground faces first in advance with ground face contact after landing gear mechanism and second afterwards The impact of frame mechanism is fallen by a series of transmissions inside landing gear mechanism after landing gear mechanism and second after first so that first The rear sliding wheel after landing gear mechanism and second in landing gear mechanism accelerates sliding afterwards；So that unmanned plane has an of short duration acceleration, two The ground shock that landing gear mechanism is subject to after landing gear mechanism and second after the lift of a fixed-wing makes first is buffered；Nothing It is man-machine as speed slows down, nose-gear mechanism and ground face contact；The impact on ground before in nose-gear mechanism so that slide Of short duration acceleration is taken turns, so that after the rotation speed of preceding sliding wheel and first after landing gear mechanism and second in landing gear mechanism After slide wheel speed and match, avoid occurring unmanned plane excessive velocities and phenomenon of turning a somersault；With body sliding speed Slow down, nose-gear mechanism generates of short duration brake；Further such that the sliding speed of unmanned plane slow down and art skating and by Gradually stop.

As the further improvement of this technology, preceding fixing groove, preceding folded slot, preceding recessing groove, band are offered on above-mentioned body Slot, driver slot, the first axial trough, front arc ladder chute, fixing groove after two, folded slot after two, recessing groove, second after two Axial trough, two rear arc ladder chutes, wherein preceding fixing groove is provided with the lower end of head；Preceding folded slot is provided under head End, and preceding folded slot is communicated with the side wall being located in front of head in preceding fixing groove；Preceding recessing groove is provided with the lower end of head, and preceding Recessing groove is communicated with the side wall of preceding fixing groove and preceding folded slot simultaneously；The trapezoidal cunning of front arc is provided on one side wall of preceding recessing groove Slot, and one end of front arc ladder chute is communicated with the lower end surface of body；Fixing groove is located at two fixed-wings after two Lower end, and fixing groove is symmetrical about the median plane of body after two；Folded slot is located at the lower end of two fixed-wings, and two after two Folded slot is communicated with the side wall in fixing groove after two in front of head respectively after a；Folded slot is about in body after two Heart face is symmetrical；Recessing groove is located at the lower end of two fixed-wings after two, and recessing groove respectively and under corresponding fixed-wing after two The rear fixing groove and rear folded slot at end communicate；Recessing groove is symmetrical about the median plane of body after two, and resigning slot position after two In the inside of two fixed-wings；Rear arc ladder chute, and rear arc ladder chute are offered on the side wall of recessing groove after each One end communicated with the lower end surface of body；Driver slot is provided with the lower end of body, and driver slot is between recessing groove after two； Trough of belt is provided with the lower end of body, and trough of belt is located at the side of preceding recessing groove and communicates with driver slot；First axle slot position Yu Qianrang On the side wall of position slot, and the first axial trough is communicated with trough of belt；Second axial trough is provided with the rear resigning matched with undercarriage after first On the side wall of slot, and the second axial trough is communicated with driver slot and with the rear recessing groove that undercarriage after second matches.

As the further improvement of this technology, above-mentioned nose-gear mechanism is mounted on the preceding fixing groove of the lower end of body head Place, and nose-gear mechanism is matched with preceding folded slot and preceding recessing groove；Undercarriage machine after landing gear mechanism and second after first Structure is symmetrically mounted at the rear fixing groove of the lower end of two fixed-wings, and undercarriage machine after landing gear mechanism and second after first Structure matches with the rear folded slot of two fixed-wing lower ends and rear recessing groove respectively；Fold driving mechanism be arranged in body and with it is preceding Landing gear mechanism matches after landing gear mechanism and second after landing gear mechanism, first.

As the further improvement of this technology, above-mentioned steering engine is mounted in the driver slot on body, and driving gear is mounted on The output shaft end of steering engine；6th gear is mounted in driver slot by axis, and the 6th gear is meshed with driving gear；6th Gear is matched with driving gear is folded.

As the further improvement of this technology, above-mentioned nose-gear mechanism includes the first fixing seat, the first loose slot, first Put slot, the first limiting slot, two the first ladder chutes, first slide, the first driving groove, the first with holes, the first slide opening, reset circle Slot, the first trapezoidal slide block, foot lever, the second driving groove, first shaft hole, first pulley, friction pulley, tooth bucket, transmission circular groove, the second axis Hole, second driving shaft, first gear, second gear, the first transmission shaft, the second belt wheel, third transmission shaft, preceding sliding wheel, first Synchronous belt, the first rack gear, limited block, friction block, pressure spring plate, limit spring, swing seat, the second slide opening, arc-shaped rack, arc are trapezoidal Draw runner, reset spring, wherein the lower end of a side end face of the first fixing seat is provided with the first pendulum slot, first is put on the upper surface of slot Offer the first loose slot；It is symmetrically opened up on two opposite side end faces in first loose slot there are two the first ladder chute, And the side wall of two the first ladder chutes and the first loose slot is tangent；The first limit is offered on the lower end surface of first fixing seat Slot, and the first limiting slot is communicated with the first pendulum slot；The side end face phase of the first pendulum slot is provided on first limiting slot and the first fixing seat It is logical；First fixing seat is fixedly mounted in the preceding fixing groove on body, and the first pendulum slot and preceding folded slot in the first fixing seat It matches；The first driving groove is offered on one side end face of first slide；First band is offered on the lower end surface of first slide Hole；The first slide opening is offered in first slide on the side end face opposite with the first driving groove notch, and the first slide opening and first passes Dynamic slot communicates；The inner wall of first slide opening is circumferentially provided with reset circular groove；In first slide on two opposite side end faces of unslotted Symmetrically there are two the first trapezoidal slide blocks for installation；First slide passes through two the first trapezoidal slide blocks and two the first ladder chutes It is slidably installed in the first loose slot of the first fixing seat；In first loose slot with the first slide opening and the first driving groove notch Limited block and the first rack gear are separately installed in opposite two side walls；One end of friction block is round end, and the other end is provided with indent Cambered surface；Friction block is mounted in the first slide opening, and the round end on friction block stretches out the first slide opening and matches with limited block；Pressure spring plate Insertion resets in circular groove, and pressure spring plate is nested in the outside of friction block and is connected therewith；Limit spring is nested in the outer of friction block Side；One end of limit spring is connect with pressure spring plate, and the other end is connect with the inner wall for resetting circular groove；Reset spring is located at the first activity The upper end of slot；One end of reset spring is connect with the inner wall of the first loose slot, the upper surface connection of the other end and first slide；Tooth Transmission circular groove is provided at one end face center of bucket；The second axis hole, and the second axis hole are provided at another end face center of tooth bucket It is communicated with transmission circular groove；The periphery of tooth bucket is the flank of tooth of 360 degree of radians, and inner headed face is the flank of tooth of 360 degree of radians；Friction Wheel, first pulley and tooth bucket are mounted in the first driving groove by second driving shaft, and friction pulley and tooth bucket position are in first pulley Two sides；Friction pulley is matched with inner concave arc surface on friction block；First pulley is located at the first surface with holes；The outer circle of tooth bucket The flank of tooth in face is matched with the first rack gear；Second gear is nested on second driving shaft, and second gear is located at the biography on tooth bucket In dynamic circular groove；Two first gears pass through corresponding first transmission shaft respectively and are mounted on the inner wall of the first driving groove, and two First gear is located in the transmission circular groove on tooth bucket；Each first gear is mutually nibbled with the inner circle flank of tooth and second gear of tooth bucket simultaneously It closes；The second driving groove is provided in foot lever, and the second driving groove is communicated with the upper surface of foot lever；Two of the lower end of foot lever are opposite The first shaft hole of perforation is provided between side end face；Foot lever is mounted on the lower end surface of first slide, and on foot lever upper surface Two driving groove notches with first on first slide lower end surface is with holes docks；Second belt wheel is mounted on second by third transmission shaft At the lower end first shaft hole of driving groove, and first shaft hole is stretched out at the both ends of third transmission shaft；Two preceding sliding wheels are mounted on third The both ends of transmission shaft；First pulley establishes drive connection by the first synchronous belt with the second belt wheel；Between the upper and lower end face of swing seat It is provided with the second slide opening of perforation；Swing seat is nested in the outside of foot lever by the second slide opening；Pacify on one side end face of arc-shaped rack Equipped with the trapezoidal draw runner of arc；Arc-shaped rack is matched by the trapezoidal draw runner of arc and the sliding of the front arc ladder chute in preceding recessing groove Before conjunction is mounted in recessing groove, and the lower end of arc-shaped rack and the side end face of swing seat are connected.

As the further improvement of this technology, undercarriage after the inner components of landing gear mechanism and second after above-mentioned first The inner components of mechanism are identical；The internal structure of landing gear mechanism is closed after the internal structure of landing gear mechanism and second after first It is symmetrical in the median plane of body；For landing gear mechanism after first, it includes the second fixing seat, the second loose slot, second Put slot, the second limiting slot, the second ladder chute, second slide, drive cavity, the second with holes, gear hole, the second trapezoidal slide block, list To clutch, rear sliding wheel, the second rack gear, foot lever, the second driving groove, first shaft hole, first pulley, tooth bucket, transmission circular groove, the Two axis holes, second driving shaft, first gear, second gear, the first transmission shaft, the second belt wheel, third transmission shaft, first synchronize Band, swing seat, the second slide opening, arc-shaped rack, the trapezoidal draw runner of arc, reset spring, wherein it is living to offer second in the second fixing seat Dynamic slot；The side end face lower end of second fixing seat offers the second pendulum slot, and the second pendulum slot and the second work being positioned above Dynamic slot communicates；The lower end surface of second fixing seat is provided with the second limiting slot, and the second limiting slot and the second pendulum slot being positioned above It communicates；The side end face that the second pendulum slot is provided on second limiting slot and the second fixing seat communicates；Two of second loose slot are opposite Second ladder chute there are two symmetrically being opened on side wall, and two the second ladder chutes put the side wall phase in slot with second respectively It cuts；Second fixing seat by the rear fixing groove that is matched with landing gear mechanism after first of the upper end insertion, and the second pendulum slot and Folded slot docking after corresponding；Drive cavity is offered in second slide；Be provided on the lower end surface of second slide it is second with holes, and Two with holes communicate vertically with drive cavity；Gear hole is provided on one side end face of second slide, and gear hole and drive cavity are lateral It communicates；Symmetrically there are two for installation on two opposite side end faces adjacent with the side end face for being provided with gear hole in second slide Two trapezoidal slide blocks；Second slide is slidably installed by two the second trapezoidal slide blocks and two the second ladder chutes second In loose slot；Second rack gear is mounted in the second loose slot, and the second rack gear is opposite with the gear hole in second slide；First band Wheel and tooth bucket are mounted in drive cavity by second driving shaft, and first pulley is located at the second surface with holes, tooth bucket outside Knuckle-tooth face is stretched out gear hole and is matched with the second rack gear；Second gear is mounted on second driving shaft, and second gear is located at tooth In the transmission circular groove of bucket；Two first gears are mounted on the side wall of drive cavity by corresponding first transmission shaft；Two first Gear is located in the transmission circular groove of tooth bucket, and each first gear is meshed with the inner circle flank of tooth and second gear of tooth bucket simultaneously； Foot lever is connected by end face thereon and the lower end surface of second slide, and the second driving groove notch on foot lever and second slide lower end The second docking with holes on face；Second belt wheel is mounted on the lower end of the second driving groove, and third transmission shaft by third transmission shaft Both ends stretch out the first shaft hole of foot lever lower end respectively；The both ends of third transmission shaft are separately installed with an one-way clutch；Often Rear sliding wheel is nested on the periphery of a one-way clutch；The connection that first pulley and the second belt wheel pass through the first synchronous belt Form drive connection；Swing seat is nested on the outside of foot lever；The trapezoidal draw runner of arc is installed on one side end face of arc-shaped rack；Arc Shape rack gear is slidably installed by the rear ladder chute in the trapezoidal draw runner circular arc of arc accordingly rear recessing groove in rear resigning In slot, and the lower end of arc-shaped rack and a side end face of swing seat are connected.

As the further improvement of this technology, above-mentioned folding driving mechanism includes the 4th transmission shaft, third gear, third band Wheel, the 4th gear, the 4th belt wheel, the 5th transmission shaft, the 5th gear, the second synchronous belt, wherein on the 4th transmission shaft insertion body The second axial trough in；Two the 4th gears are separately mounted to the both ends of the 4th transmission shaft, and two the 4th gears are located at two After a in recessing groove；Two the 4th gears respectively with first after arc-shaped rack after landing gear mechanism and second in landing gear mechanism It is meshed；Third gear and third belt wheel are mounted on the 4th transmission shaft, and third gear and third belt wheel are located on body In driver slot；Third gear is meshed with the 6th gear；5th transmission shaft is embedded in the first axial trough；4th belt wheel and the 5th gear It is separately mounted to the both ends of the 5th transmission shaft；5th gear is located in preceding recessing groove, and in the 5th gear and nose-gear mechanism Arc-shaped rack be meshed；4th belt wheel is located in trough of belt, and the 4th belt wheel is formed by the second synchronous belt and third belt wheel and passed Dynamic relationship.

As the further improvement of this technology, the transmission ratio of above-mentioned third belt wheel and the 4th belt wheel is 1:1.

As the further improvement of this technology, the transmission ratio of above-mentioned third gear and driving gear is 1:1.

As the further improvement of this technology, the diameter of above-mentioned 4th gear is equal with the diameter of the 5th gear.

Relative to traditional unmanned plane, the unmanned plane in the present invention is fixed-wing unmanned plane, and only by a steering engine come Realize nose-gear mechanism, landing gear mechanism stacks after landing gear mechanism and second after first；In unmanned plane landing, steering engine It is put down by landing gear mechanism after folding driving mechanism drive nose-gear mechanism, first and the second landing gear mechanism, for nobody The landing of machine is ready；Landing gear mechanism is fallen to the ground out in advance after landing gear mechanism and second after the first of unmanned plane Beginning is when sliding, after ground faces first after landing gear mechanism and second impact of undercarriage machine so that landing gear mechanism and the after first Rear sliding wheel after two in undercarriage machine accelerates rotation；The lift of two fixed-wings increases so that after first landing gear mechanism and The ground shock that undercarriage machine is subject to after second is buffered；When the nose-gear mechanism on unmanned plane when being contacted with ground, ground Impact in face of nose-gear mechanism is so that the of short duration acceleration of preceding sliding wheel in nose-gear mechanism rotates, so that unmanned plane will not Overturning phenomenon occurs because the speed of preceding sliding wheel and rear sliding wheel is inconsistent；Then, in nose-gear mechanism before slide Wheel is by of short duration brake, so that the sliding speed of unmanned plane further decreases, so that unmanned plane smoothly lands and gradually acceleration and deceleration And stop, impact of the high speed impact to undercarriage is reduced to the maximum extent；The configuration of the present invention is simple has preferable using effect Fruit.

Detailed description of the invention

Fig. 1 is unmanned plane overall schematic.

Fig. 2 is nose-gear mechanism and body cooperation diagrammatic cross-section.

Fig. 3 is landing gear mechanism and body cooperation diagrammatic cross-section after first.

Fig. 4 is landing gear mechanism and body cooperation diagrammatic cross-section after second.

Fig. 5 is landing gear mechanism and to fold driving after landing gear mechanism, second after preceding organism bottom landing gear mechanism, first Distribution of Institutions schematic diagram.

Fig. 6 is landing gear mechanism and to fold driving after landing gear mechanism, second after preceding organism bottom landing gear mechanism, first Mechanism cooperates diagrammatic cross-section.

Fig. 7 is nose-gear mechanism, body and folding driving mechanism cooperation diagrammatic cross-section.

Fig. 8 is landing gear mechanism, body and folding driving mechanism cooperation diagrammatic cross-section after first.

Fig. 9 is landing gear mechanism, body and folding driving mechanism cooperation diagrammatic cross-section after second.

Figure 10 is organism bottom schematic diagram.

Figure 11 is organism bottom diagrammatic cross-section.

Figure 12 is preceding fixing groove, preceding folded slot, preceding recessing groove and front arc ladder chute diagrammatic cross-section.

Figure 13 be with first after the landing gear mechanism rear fixing groove, rear folded slot, rear recessing groove and the rear arc that cooperate it is trapezoidal Sliding slot diagrammatic cross-section.

Figure 14 be with second after the landing gear mechanism rear fixing groove, rear folded slot, rear recessing groove and the rear arc that cooperate it is trapezoidal Sliding slot diagrammatic cross-section.

Figure 15 landing gear mechanism and is folded driving mechanism after landing gear mechanism, second and matches after nose-gear mechanism, first Close schematic diagram.

Figure 16 is landing gear mechanism cooperation schematic diagram after folding driving mechanism and first.

Figure 17 is nose-gear with regard to schematic diagram.

Figure 18 is nose-gear mechanism elevational schematic view.

Figure 19 be the first fixing seat inside nose-gear, first slide, tooth bucket, the first rack gear, first pulley, synchronous belt and Foot lever cooperates diagrammatic cross-section.

Figure 20 is the in-house first pulley of nose-gear, synchronous belt, foot lever and the second belt wheel cooperation diagrammatic cross-section.

Figure 21 is the in-house first gear of nose-gear, second gear, tooth bucket, first pulley, friction pulley, foot lever, pendulum Seat, arc-shaped rack and the trapezoidal draw runner of arc cooperate diagrammatic cross-section.

Figure 22 is preceding sliding wheel, third axis, the second belt wheel and synchronous belt cooperation diagrammatic cross-section.

Figure 23 is first gear in nose-gear mechanism, second gear, friction pulley, first pulley and synchronous belt cooperation section Schematic diagram.

Figure 24 is that first gear in nose-gear mechanism, second gear, tooth bucket, first slide and the cooperation of the first fixing seat are cutd open Face schematic diagram.

Figure 25 is limited block, friction block, limit spring and friction pulley cooperation diagrammatic cross-section.

Figure 26 is the first fixing seat perspective diagram.

Figure 27 is the first fixing seat diagrammatic cross-section.

Figure 28 is swing seat, arc-shaped rack and the trapezoidal draw runner cooperation schematic diagram of arc.

Figure 29 is first slide, the first trapezoidal slide block and foot lever cooperation schematic diagram.

Figure 30 is first slide, the first trapezoidal slide block and foot lever cooperation diagrammatic cross-section.

Figure 31 is first slide schematic diagram.

Figure 32 is first slide diagrammatic cross-section.

Figure 33 is foot lever perspective diagram.

Figure 34 is tooth bucket schematic diagram.

Figure 35 is landing gear mechanism schematic diagram after first.

Figure 36 is the second fixing seat, second slide, first pulley, synchronous belt and the second belt wheel in landing gear mechanism after first Cooperate diagrammatic cross-section.

Figure 37 is first gear, second gear, tooth bucket, reset spring, first pulley, foot in landing gear mechanism after first Bar, swing seat, arc-shaped rack and the trapezoidal draw runner of arc cooperate diagrammatic cross-section.

Figure 38 is rear sliding wheel, one-way clutch, third axis, the second belt wheel and synchronous belt cooperation diagrammatic cross-section.

Figure 39 is the second fixing seat perspective diagram.

Figure 40 is first gear in the first landing gear mechanism, second gear, tooth bucket, first pulley, second slide and second Trapezoidal slide block cooperates diagrammatic cross-section.

Figure 41 is second slide, the second trapezoidal slide block and foot lever cooperation schematic diagram.

Figure 42 is second slide perspective diagram.

Figure 43 is second slide, the second trapezoidal slide block and foot lever cooperation diagrammatic cross-section.

Figure 44 is to fold driving mechanism schematic diagram.

Figure label title: 1, body；2, preceding fixing groove；3, preceding folded slot；4, preceding recessing groove；5, trough of belt；6, driver slot； 7, the first axial trough；8, front arc ladder chute；9, rear fixing groove；10, rear folded slot；11, rear recessing groove；12, the second axial trough； 13, rear arc ladder chute；14, nose-gear mechanism；15, landing gear mechanism after first；16, landing gear mechanism after second；17, First fixing seat；18, the first loose slot；19, the first pendulum slot；20, the first limiting slot；21, the first ladder chute；22, first is sliding Seat；23, the first driving groove；24, first is with holes；25, the first slide opening；26, circular groove is resetted；27, the first trapezoidal slide block；28, foot lever； 29, the second driving groove；30, first shaft hole；31, first pulley；32, friction pulley；33, tooth bucket；34, it is driven circular groove；35, the second axis Hole；36, second driving shaft；37, first gear；38, the first transmission shaft；39, the second belt wheel；40, third transmission shaft；41, advancing slip Row wheel；42, the first synchronous belt；43, the first rack gear；44, limited block；45, friction block；46, pressure spring plate；47, limit spring；48, Swing seat；49, the second slide opening；50, arc-shaped rack；51, the trapezoidal draw runner of arc；52, reset spring；53, second gear；54, second Fixing seat；55, the second loose slot；56, the second pendulum slot；57, the second limiting slot；58, the second ladder chute；59, second slide； 60, drive cavity；61, second is with holes；62, gear hole；63, the second trapezoidal slide block；64, one-way clutch；65, rear sliding wheel；66, Second rack gear；67, driving mechanism is folded；68, the 4th transmission shaft；69, third gear；70, third belt wheel；71, the 4th gear； 72, the 4th belt wheel；73, the 5th transmission shaft；74, the 5th gear；75, the second synchronous belt；76, the 6th gear；77, gear is driven； 78, steering engine.

Specific embodiment

As shown in Fig. 1,5,6, it includes being risen after body 1, nose-gear mechanism 14, first after landing gear mechanism 15, second It falls frame mechanism 16, fold driving mechanism 67, the 6th gear 76, driving gear 77, steering engine 78, wherein body 1 is existing fixation Wing unmanned plane body 1；Steering engine 78 passes sequentially through driving gear 77 and the operation of 76 Foldable driving mechanism 67 of the 6th gear；It folds Landing gear mechanism 16 is run after landing gear mechanism 15 and second after the drive of driving mechanism 67 nose-gear mechanism 14, first, thus Realize after nose-gear mechanism 14, first stacking for landing gear mechanism 16 after landing gear mechanism 15 and second.

After unmanned plane lift-off, steering engine 78 passes sequentially through driving gear 77, the 6th gear 76 and folds driving mechanism 67 and drives Arc of the landing gear mechanism 16 around corresponding arc ladder chute after landing gear mechanism 15 and second after nose-gear mechanism 14, first Mandrel line is swung to 1 front upper place of body, so that undercarriage machine after landing gear mechanism 15 and second after nose-gear mechanism 14, first The folding of structure 16 is packed up in income body 1, to reduce the windage that unmanned plane is subject in flight course, and then is improved unmanned plane and is flown Row voyage and speed.

Before unmanned plane landing, rise and fall after landing gear mechanism 15 and second after the drive of steering engine 78 nose-gear mechanism 14, first Frame mechanism 16 is swung around the arc core axis of corresponding arc ladder chute to 1 back lower place of body, so that nose-gear mechanism 14, the Landing gear mechanism 16 is put down after landing gear mechanism 15 and second after one, is ready for the landing of unmanned plane；Such as the institute of Fig. 2,3,4 Show, when unmanned plane lands, on unmanned plane first after after landing gear mechanism 15 and second landing gear mechanism 16 connect in advance with ground Touching, 15 He of landing gear mechanism after the impact of landing gear mechanism 16 passes through first after landing gear mechanism 15 and second after ground faces first A series of transmissions after second inside landing gear mechanism 16 are so that landing gear mechanism 16 after landing gear mechanism 15 and second after first In rear sliding wheel 65 accelerate sliding；So that unmanned plane rises and falls after having of short duration acceleration, the lift of two fixed-wings to make first The ground shock that landing gear mechanism 16 is subject to after frame mechanism 15 and second is buffered；Unmanned plane slows down with speed, preceding to rise and fall Frame mechanism 14 and ground face contact；The impact on ground makes so that the of short duration acceleration of preceding sliding wheel 41 in nose-gear mechanism 14 Rear sliding wheel 65 after the rotation speed and first of preceding sliding wheel 41 after landing gear mechanism 15 and second in landing gear mechanism 16 Speed matches, and avoids that unmanned plane excessive velocities and phenomenon of turning a somersault occurs；It is preceding with slowing down for 1 sliding speed of body Landing gear mechanism 14 generates of short duration brake；Further such that the sliding speed of unmanned plane slows down and art skating and gradually stops Only.

As shown in Figure 10,11,12, fixing groove 2, preceding folded slot 3, preceding recessing groove 4, trough of belt before being offered on above-mentioned body 1 5, driver slot 6, the first axial trough 7, recessing groove after folded slot 10, two after fixing groove 9, two after front arc ladder chute 8, two 11,12, two rear arc ladder chutes 13 of the second axial trough, wherein as shown in Figure 10, preceding fixing groove 2 is provided with the lower end of head； Preceding folded slot 3 is provided with the lower end of head, and preceding folded slot 3 is communicated with the side wall being located in front of head in preceding fixing groove 2；Before allow Position slot 4 is provided with the lower end of head, and preceding recessing groove 4 is communicated with the side wall of preceding fixing groove 2 and preceding folded slot 3 simultaneously；Such as Figure 12 It is shown, front arc ladder chute 8, and one end of front arc ladder chute 8 and body 1 are provided on a side wall of preceding recessing groove 4 Lower end surface communicate；As shown in figure 11, fixing groove 9 is located at the lower ends of two fixed-wings, and fixing groove 9 after two after two Median plane about body 1 is symmetrical；Folded slot 10 is located at the lower end of two fixed-wings after two, and folded slot 10 is distinguished after two It is communicated with the side wall in fixing groove 9 after two in front of head；Folded slot 10 is symmetrical about the median plane of body 1 after two； Recessing groove 11 is located at the lower end of two fixed-wings after two, and recessing groove 11 respectively and behind corresponding fixed-wing lower end after two Fixing groove 9 and rear folded slot 10 communicate；As shown in Figure 13,14, recessing groove 11 is symmetrical about the median plane of body 1 after two, and Recessing groove 11 is located at the inside of two fixed-wings after two；Rear arc ladder chute is offered on the side wall of recessing groove 11 after each 13, and one end of rear arc ladder chute 13 is communicated with the lower end surface of body 1；Driver slot 6 is provided with the lower end of body 1, and drives After dynamic slot 6 is located at two between recessing groove 11；Trough of belt 5 is provided with the lower end of body 1, and trough of belt 5 is located at the side of preceding recessing groove 4 And it is communicated with driver slot 6；First axial trough 7 is located on the side wall of preceding recessing groove 4, and the first axial trough 7 is communicated with trough of belt 5；Second axis Slot 12 is provided on the side wall of the rear recessing groove 11 matched with undercarriage after first, and the second axial trough 12 and driver slot 6 and with The rear recessing groove 11 that undercarriage matches after second communicates.

As shown in Fig. 2,7, above-mentioned nose-gear mechanism 14 is mounted at the preceding fixing groove 2 of the lower end of 1 head of body, and preceding Landing gear mechanism 14 is matched with preceding folded slot 3 and preceding recessing groove 4；As shown in Figure 8,9, landing gear mechanism 15 and second after first Landing gear mechanism 16 is symmetrically mounted at the rear fixing groove 9 of the lower end of two fixed-wings afterwards, and landing gear mechanism 15 after first Landing gear mechanism 16 matches with the rear folded slot 10 of two fixed-wing lower ends and rear recessing groove 11 respectively after with second；As Fig. 6, 15, shown in 16, fold driving mechanism 67 be arranged in body 1 and with landing gear mechanism 15 after nose-gear mechanism 14, first and Landing gear mechanism 16 matches after second.

As shown in Fig. 2,5,6, above-mentioned steering engine 78 is mounted in the driver slot 6 on body 1, and driving gear 77 is mounted on steering engine 78 output shaft end；6th gear 76 is mounted in driver slot 6 by axis, and the 6th gear 76 is nibbled with driving 77 phase of gear It closes；6th gear 76 is matched with driving gear 77 is folded.

As shown in Figure 17,18, above-mentioned nose-gear mechanism 14 includes the first fixing seat 17, the first loose slot 18, first pendulum Slot 19,20, two the first ladder chutes 21 of the first limiting slot, first slide 22, the first driving groove 23, first with holes 24, first Slide opening 25 resets circular groove 26, the first trapezoidal slide block 27, foot lever 28, the second driving groove 29, first shaft hole 30, first pulley 31, rubs Wheel 32, tooth bucket 33, transmission circular groove 34, the second axis hole 35, second driving shaft 36, first gear 37, second gear 53, first is wiped to pass Moving axis 38, third transmission shaft 40, preceding sliding wheel 41, the first synchronous belt 42, the first rack gear 43, limited block 44, rubs at second belt wheel 39 Cleaning block 45, limit spring 47, swing seat 48, the second slide opening 49, arc-shaped rack 50, the trapezoidal draw runner 51 of arc, resets bullet at pressure spring plate 46 Spring 52, wherein as shown in figure 26, the lower end of a side end face of the first fixing seat 17 is provided with the first pendulum slot 19, the first pendulum slot 19 The first loose slot 18 is offered on upper surface；As shown in figure 27, in the first loose slot 18 on two opposite side end faces symmetrically First ladder chute 21 there are two opening up, and the side wall of two the first ladder chutes 21 and the first loose slot 18 is tangent；Such as Figure 26 It is shown, the first limiting slot 20 is offered on the lower end surface of the first fixing seat 17, and the first limiting slot 20 is communicated with the first pendulum slot 19； The side end face that the first pendulum slot 19 is provided on first limiting slot 20 and the first fixing seat 17 communicates；As shown in Fig. 2, the first fixing seat 17 It is fixedly mounted in the preceding fixing groove 2 on body 1, and the first pendulum slot 19 in the first fixing seat 17 is matched with preceding folded slot 3； As shown in figure 31, the first driving groove 23 is offered on a side end face of first slide 22；It is opened on the lower end surface of first slide 22 Equipped with first with holes 24；As shown in figure 32, it is offered on side end face opposite with 23 notch of the first driving groove in first slide 22 First slide opening 25, and the first slide opening 25 is communicated with the first driving groove 23；The inner wall of first slide opening 25, which is circumferentially provided with, resets circular groove 26； As shown in Figure 29,30, symmetrically installation is trapezoidal there are two first on two opposite side end faces of unslotted in first slide 22 Sliding block 27；As shown in figure 21, first slide 22 passes through the sliding of two first trapezoidal slide blocks 27 and two the first ladder chutes 21 It is fitted in the first loose slot 18 of the first fixing seat 17；As shown in Figure 19,25, in the first loose slot 18 with the first slide opening 25 and the opposite two side walls of 23 notch of the first driving groove on be separately installed with limited block 44 and the first rack gear 43；Such as Figure 25 institute Show, one end of friction block 45 is round end, and the other end is provided with inner concave arc surface；Friction block 45 is mounted in the first slide opening 25, and is rubbed Round end on block 45 stretches out the first slide opening 25 and matches with limited block 44；The insertion of pressure spring plate 46 resets in circular groove 26, and pressure spring plate 46 are nested in the outside of friction block 45 and are connected therewith；Limit spring 47 is nested in the outside of friction block 45；Limit spring 47 One end is connect with pressure spring plate 46, and the other end is connect with the inner wall for resetting circular groove 26；As shown in figure 19, reset spring 52 is located at first The upper end of loose slot 18；One end of reset spring 52 is connect with the inner wall of the first loose slot 18, the other end and first slide 22 Upper surface connection；As shown in figure 34, transmission circular groove 34 is provided at an end face center of tooth bucket 33；Another end face of tooth bucket 33 The second axis hole 35 is provided at center, and the second axis hole 35 is communicated with transmission circular groove 34；The periphery of tooth bucket 33 is 360 degree of radians The flank of tooth, inner headed face are the flank of tooth of 360 degree of radians；As shown in figure 23, friction pulley 32, first pulley 31 and tooth bucket 33 pass through second Transmission shaft 36 is mounted in the first driving groove 23, and friction pulley 32 and tooth bucket 33 are located at the two sides of first pulley 31；Such as Figure 25 institute Show, friction pulley 32 is matched with inner concave arc surface on friction block 45；As shown in figure 23, first pulley 31 is being located at first with holes 24 just Top；As shown in figure 24, the flank of tooth of the periphery of tooth bucket 33 is matched with the first rack gear 43；As shown in figure 23, second gear 53 It is nested on second driving shaft 36, and second gear 53 is located in the transmission circular groove 34 on tooth bucket 33；Two first gears 37 are divided Not Tong Guo corresponding first transmission shaft 38 be mounted on the inner wall of the first driving groove 23, and two first gears 37 are located at tooth bucket 33 On transmission circular groove 34 in；Each first gear 37 is meshed with the inner circle flank of tooth of tooth bucket 33 and second gear 53 simultaneously；Such as figure Shown in 33, the second driving groove 29 is provided in foot lever 28, and the second driving groove 29 is communicated with the upper surface of foot lever 28；Under foot lever 28 The first shaft hole 30 of perforation is provided between two opposite side end faces at end；As shown in Figure 29,30, it is sliding that foot lever 28 is mounted on first On the lower end surface of seat 22, and 29 notch of the second driving groove on 28 upper surface of foot lever and the first band on 22 lower end surface of first slide It docks in hole 24；As shown in figure 22, the second belt wheel 39 is mounted on the lower end first axle of the second driving groove 29 by third transmission shaft 40 At hole 30, and first shaft hole 30 is stretched out at the both ends of third transmission shaft 40；Two preceding sliding wheels 41 are mounted on third transmission shaft 40 Both ends；As shown in figure 20, first pulley 31 and the second belt wheel 39 establish drive connection by the first synchronous belt 42；Such as Figure 28 institute Show, the second slide opening 49 of perforation is provided between the upper and lower end face of swing seat 48；As shown in Figure 20,21, swing seat 48 passes through the second slide opening 49 are nested in the outside of foot lever 28；The trapezoidal draw runner 51 of arc is installed on one side end face of arc-shaped rack 50；As shown in figure 28, Arc-shaped rack 50 is slidably installed by the trapezoidal draw runner 51 of arc and the front arc ladder chute 8 in preceding recessing groove 4 preceding In recessing groove 4, and the lower end of arc-shaped rack 50 and the side end face of swing seat 48 are connected.

As shown in Figure 35,36, landing gear mechanism 16 after the inner components of landing gear mechanism 15 and second after above-mentioned first Inner components it is identical；The internal structure of landing gear mechanism 16 is closed after the internal structure of landing gear mechanism 15 and second after first It is symmetrical in the median plane of body 1；For landing gear mechanism 15 after first, it includes the second fixing seat 54, the second loose slot 55, the second pendulum slot 56, the second limiting slot 57, the second ladder chute 58, second slide 59, drive cavity 60, the second with holes 61, gear Hole 62, the second trapezoidal slide block 63, one-way clutch 64, rear sliding wheel 65, the second rack gear 66, foot lever 28, the second driving groove 29, One axis hole 30, first pulley 31, tooth bucket 33, transmission circular groove 34, the second axis hole 35, second driving shaft 36, first gear 37, second Gear 53, the first transmission shaft 38, the second belt wheel 39, third transmission shaft 40, the first synchronous belt 42, swing seat 48, the second slide opening 49, arc The trapezoidal draw runner 51 of shape rack gear 50, arc, reset spring 52, wherein as shown in figure 39, it is living that second is offered in the second fixing seat 54 Dynamic slot 55；The side end face lower end of second fixing seat 54 offers the second pendulum slot 56, and second puts slot 56 and be positioned above The second loose slot 55 communicate；The lower end surface of second fixing seat 54 is provided with the second limiting slot 57, and the second limiting slot 57 be located at The second pendulum slot 56 above it communicates；The side end face phase of the second pendulum slot 56 is provided on second limiting slot 57 and the second fixing seat 54 It is logical；It is symmetrically opened on two opposite side walls of the second loose slot 55 there are two the second ladder chute 58, and two second trapezoidal Sliding slot 58 is tangent with the side wall in the second pendulum slot 56 respectively；As shown in Figure 3,4, the second fixing seat 54 passes through the upper end insertion and the In the rear fixing groove 9 that landing gear mechanism 15 matches after one, and the second pendulum slot 56 is docked with corresponding rear folded slot 10；Such as Figure 42 It is shown, drive cavity 60 is offered in second slide 59；Second with holes 61 is provided on the lower end surface of second slide 59, and second is with holes 61 communicate vertically with drive cavity 60；Gear hole 62, and gear hole 62 and drive cavity are provided on one side end face of second slide 59 60 laterally communicate；As shown in figure 41, two opposite sides adjacent with the side end face for being provided with gear hole 62 in second slide 59 Symmetrically there are two the second trapezoidal slide blocks 63 for installation on face；As shown in Figure 8,9, second slide 59 passes through two the second trapezoidal slide blocks 63 and two the second ladder chutes 58 be slidably installed in the second loose slot 55；As shown in figure 36, the second rack gear 66 is pacified In the second loose slot 55, and the second rack gear 66 is opposite with the gear hole 62 in second slide 59；As shown in Figure 37,40, the One belt wheel 31 and tooth bucket 33 are mounted in drive cavity 60 by second driving shaft 36, and first pulley 31 is positioned at second with holes 61 Surface, the outer circle flank of tooth of tooth bucket 33 stretch out gear hole 62 and match with the second rack gear 66；Second gear 53 is mounted on the second biography On moving axis 36, and second gear 53 is located in the transmission circular groove 34 of tooth bucket 33；Two first gears 37 are passed by corresponding first Moving axis 38 is mounted on the side wall of drive cavity 60；Two first gears 37 are located in the transmission circular groove 34 of tooth bucket 33, and each One gear 37 is meshed with the inner circle flank of tooth of tooth bucket 33 and second gear 53 simultaneously；As shown in Figure 41,43, foot lever 28 is by thereon End face and the lower end surface of second slide 59 are connected, and on 29 notch of the second driving groove on foot lever 28 and 59 lower end surface of second slide Second it is with holes 61 docking；As shown in figure 38, the second belt wheel 39 is mounted under the second driving groove 29 by third transmission shaft 40 End, and the first shaft hole 30 of 28 lower end of foot lever is stretched out at the both ends of third transmission shaft 40 respectively；Distinguish at the both ends of third transmission shaft 40 One one-way clutch 64 is installed；Rear sliding wheel 65 is nested on the periphery of each one-way clutch 64；As shown in figure 36, First pulley 31 and the second belt wheel 39 form drive connection by the connection of the first synchronous belt 42；The outside of foot lever 28 is nested with Swing seat 48；As shown in figure 35, the trapezoidal draw runner 51 of arc is installed on a side end face of arc-shaped rack 50；Such as the institute of Fig. 8,9,37 Show, the peace that is slidably matched that arc-shaped rack 50 passes through the rear ladder chute in trapezoidal 51 circular arc of draw runner of arc accordingly rear recessing groove 11 In rear recessing groove 11, and the lower end of arc-shaped rack 50 and a side end face of swing seat 48 are connected.

As shown in figure 44, above-mentioned folding driving mechanism 67 include the 4th transmission shaft 68, third gear 69, third belt wheel 70, 4th gear 71, the 4th belt wheel 72, the 5th transmission shaft 73, the 5th gear 74, the second synchronous belt 75, wherein the as shown in fig. 6, the 4th Transmission shaft 68 is embedded in the second axial trough 12 on body 1；As shown in Figure 8,9, two the 4th gears 71 are separately mounted to the 4th biography The both ends of moving axis 68, and two the 4th gears 71 be located at two after in recessing groove 11；Two the 4th gears 71 are respectively with Arc-shaped rack 50 after one after landing gear mechanism 15 and second in landing gear mechanism 16 is meshed；As shown in fig. 6, third gear 69 It is mounted on the 4th transmission shaft 68 with third belt wheel 70, and third gear 69 and third belt wheel 70 are located at the driver slot 6 on body 1 In；As shown in Fig. 2, third gear 69 is meshed with the 6th gear 76；5th transmission shaft 73 is embedded in the first axial trough 7；4th band Wheel 72 and the 5th gear 74 are separately mounted to the both ends of the 5th transmission shaft 73；As shown in fig. 7, the 5th gear 74 is located at preceding recessing groove In 4, and the 5th gear 74 is meshed with the arc-shaped rack 50 in nose-gear mechanism 14；As shown in figure 44, the 4th belt wheel 72 In trough of belt 5, and the 4th belt wheel 72 forms drive connection with third belt wheel 70 by the second synchronous belt 75.

As shown in figure 44, the transmission ratio of above-mentioned third belt wheel 70 and the 4th belt wheel 72 is 1:1.

As shown in figure 44, the transmission ratio of above-mentioned third gear 69 and driving gear 77 is 1:1.

As shown in figure 44, the diameter of above-mentioned 4th gear 71 is equal with the diameter of the 5th gear 74.

Unmanned plane is small drone in the present invention, and bottom surface coasting distance is 10 meters -20 meters, and preceding sliding wheel 41, which does not have, to be turned To function.

It is bearing fit between tooth bucket 33 in the present invention and second driving shaft 36.

When unmanned plane in the present invention is stopped on the ground, due to the gravity of unmanned plane itself, nose-gear mechanism First slide 22 in 14 is along the upper end of two 21 upward slidings of the first ladder chute and the first loose slot 18 of arrival, friction block 45 It crosses limited block 44 and is located at the top of limited block 44；After first after landing gear mechanism 15 and second in landing gear mechanism 16 Two slides 59 are along corresponding second ladder chute, 58 upward sliding and reach the upper end extreme position of corresponding second loose slot 55； Reset spring 52 after nose-gear mechanism 14, first after landing gear mechanism 15 and second in landing gear mechanism 16 is compressed to pole Extreme position；After unmanned plane goes up to the air from ground taxi, under the action of reset spring 52, first in nose-gear mechanism 14 is sliding Seat 22 is detached from the first ladder chute 21, and the second slide 59 after first after landing gear mechanism 15 and second in landing gear mechanism 16 is de- From the second ladder chute 58；Friction block 45 in nose-gear mechanism 14 crosses the lower section that limited block 44 reaches limited block 44, whole A first slide 22 is snapped down in the first pendulum slot 19；After first after landing gear mechanism 15 and second in landing gear mechanism 16 second Slide 59 slides into corresponding second pendulum slot 56, to rise after landing gear mechanism 15 and second after nose-gear mechanism 14, first The folding for falling frame mechanism 16 is ready.

The transmission ratio of third belt wheel 70 and the 4th belt wheel 72 is 1:1, third gear 69 and driving gear 77 in the present invention Transmission ratio is 1:1, and the purpose of design that the diameter of the 4th gear 71 is equal with the diameter of the 5th gear 74 is that steering engine 78 drives driving Gear 77 rotates by a certain angle, and driving gear 77 drives third gear 69 and 70 synchronous rotary of third belt wheel by the 6th gear 76 Equal angular；Third gear 69 drives two the 4th gears 71 to rotate equal angular by the 4th transmission shaft 68；Third belt wheel 70 The 4th belt wheel 72 is driven to rotate equal angular by the second synchronous belt 75；4th belt wheel 72 drives the 5th by the 5th transmission shaft 73 Gear 74 rotates equal angular；The direction of rotation of two the 4th gears 71 is identical as the direction of rotation of the 5th gear 74；Due to The diameter of four gears 71 is equal with the diameter of the 5th gear 74, so rising and falling after the swing angle of nose-gear mechanism 14 and first The swing angle of landing gear mechanism 16 is identical after frame mechanism 15 and second；Landing gear mechanism 15 after nose-gear mechanism 14, first With after second landing gear mechanism 16 stack it is synchronous.

Workflow of the invention: after unmanned plane lift-off, the restoring force of the reset spring 52 in nose-gear mechanism 14 So that the landing gear mechanism 16 after landing gear mechanism 15 and second after 21 slide downward of the first ladder chute, first of first slide 22 In second slide 59 along corresponding second ladder chute, 58 slide downward；Undercarriage after landing gear mechanism 15 and second after first Tooth after two the second rack gears 66 in mechanism 16 drive first respectively after landing gear mechanism 15 and second in landing gear mechanism 16 Bucket 33 is rotated to the direction of unmanned plane during flying；Two tooth buckets after first after landing gear mechanism 15 and second in landing gear mechanism 16 33 drive corresponding first pulley 31 to fly to unmanned plane by corresponding first gear 37, second gear 53 and second driving shaft 36 Capable opposite direction rotation；Two first pulleys 31 after first after landing gear mechanism 15 and second in landing gear mechanism 16 pass through phase The first synchronous belt 42, the second belt wheel 39 and the third transmission shaft 40 answered drive corresponding one-way clutch 64 to unmanned plane during flying Opposite direction rotation；At the same time, the blunt end of the friction block 45 in nose-gear mechanism 14 and limited block 44 interact；Friction Block 45 under the action of limited block 44 along the first slide opening 25 to contract, the outer circle of inner concave arc surface and friction pulley 32 on friction block 45 Face contact；Pressure spring plate 46 compresses limit spring 47 and makes 47 energy storage of limit spring；After friction block 45 crosses limited block 44, limiting Friction block 45, which is detached from, under the action of the spring 47 of position friction pulley 32 and returns to initial position, the tooth bucket 33 in nose-gear mechanism 14 with First rack gear 43 starts to engage and interact；First rack gear 43 is rotated with movable tooth bucket 33 to the direction of unmanned plane during flying； Tooth bucket 33 drives two first gears 37 to rotate to the direction of unmanned plane during flying；Two first gears 37 drive second gear 53 rotate to the opposite direction of unmanned plane during flying；Second gear 53 drives friction pulley 32 and first band by second driving shaft 36 Wheel 31 is rotated to the opposite direction of unmanned plane during flying；First pulley 31 drives the rotation of the second belt wheel 39 by the first synchronous belt 42；The Two belt wheels 39 drive two preceding sliding wheels 41 to rotate to the opposite direction of unmanned plane during flying by third transmission shaft 40；Nose-gear machine Reset spring 52 in structure 14 first slide 22 skid off the first loose slot 18 in the first fixing seat 17 finally down to go forward side by side Enter in the first pendulum slot 19 in the first fixing seat 17；Two after first after landing gear mechanism 15 and second in landing gear mechanism 16 Reset spring 52 makes corresponding second slide 59 skid off the second loose slot 55 in the second fixing seat 54 finally down simultaneously respectively Into in the second pendulum slot 56 in the second fixing seat 54；Unmanned plane driver presses the undercarriage folding switch on remote controler, control Steering engine 78 on unmanned plane processed is run；Steering engine 78 drives third gear 69 and third band by driving gear 77 and the 6th gear 76 Take turns the 70 opposite direction synchronous rotaries to unmanned plane during flying；Third belt wheel 70 passes through the second synchronous belt 75, the 4th belt wheel 72 and the 5th Transmission shaft 73 drives the 5th gear 74 to rotate to the opposite direction of unmanned plane during flying；The rotation of two the 4th gears 71 and the 5th gear 74 It is identical to turn direction；5th gear 74 passes through the arc-shaped rack 50 being engaged with and swing seat 48 drives nose-gear mechanism 14 around arc The arc core axis of rack gear 50 is swung up and enters in preceding folded slot 3；Two the 4th gears 71 pass through corresponding arc-shaped rack 50 With swing seat 48 drive respectively the first landing gear mechanism and the second landing gear mechanism around corresponding arc-shaped rack 50 arc core axis to Upper swing simultaneously enters in corresponding rear folded slot 10；It rises and falls after landing gear mechanism 15 and second after nose-gear mechanism 14, first Frame mechanism 16 is folded packs up simultaneously, reduces windage when unmanned plane during flying to the maximum extent.

Before unmanned plane landing, unmanned plane driver presses the undercarriage folding switch on remote controler, controls on unmanned plane 78 inverted running of steering engine；Steering engine 78 by driving gear 77 and the 6th gear 76 drive third gear 69 and third belt wheel 70 to The direction synchronous rotary of unmanned plane during flying；Third belt wheel 70 passes through the second synchronous belt 75, the 4th belt wheel 72 and the 5th transmission shaft 73 The 5th gear 74 is driven to rotate to the direction of unmanned plane during flying；5th gear 74 passes through the arc-shaped rack 50 and swing seat being engaged with 48 drive nose-gear mechanisms 14 to lower swing and show preceding folded slot 3 around the arc core axis of arc-shaped rack 50；Two the 4th teeth Wheel 71 drives the first landing gear mechanism and the second landing gear mechanism around corresponding respectively by corresponding arc-shaped rack 50 and swing seat 48 Arc-shaped rack 50 arc core axis to lower swing and show it is corresponding after folded slot 10；It is risen after nose-gear mechanism 14, first It falls landing gear mechanism 16 after frame mechanism 15 and second while being laid down, be ready for the landing of unmanned plane.

Landing gear mechanism 16 is leading simultaneously when being contacted with ground after landing gear mechanism 15 and second after the first of unmanned plane, Since the sinking speed of unmanned plane is very big, 16 presence of landing gear mechanism is very big after landing gear mechanism 15 and second after ground faces first Impact；Undercarriage after foot lever 28 after ground passes through first after landing gear mechanism 15 and second in landing gear mechanism 16 makes first Two second slides 59 after mechanism 15 and second in landing gear mechanism 16 are transported into corresponding second loose slot 55 upwards respectively Dynamic, it is trapezoidal that the second trapezoidal slide block 63 after first after landing gear mechanism 15 and second in landing gear mechanism 16 enters corresponding second In sliding slot 58；Two tooth buckets 33 after first after landing gear mechanism 15 and second in landing gear mechanism 16 respectively with the first rack gear 43 Interaction；Tooth bucket 33 after first in landing gear mechanism 15 is passed by corresponding first gear 37, second gear 53 and second Moving axis 36 drives first pulley 31 to rotate；First pulley 31 drives the second belt wheel 39 to rotate by the first synchronous belt 42；The It is sliding after two after two belt wheels 39 drive first by third transmission shaft 40 and two one-way clutch 64 in landing gear mechanism 15 Row wheel 65 is quickly rotated to the direction of unmanned plane during flying；Tooth bucket 33 after second in landing gear mechanism 16 passes through corresponding first tooth Wheel 37, second gear 53 and second driving shaft 36 drive first pulley 31 to rotate；First pulley 31 passes through 42 band of the first synchronous belt Dynamic second belt wheel 39 rotates；Second belt wheel 39 rises after driving second by third transmission shaft 40 and two one-way clutch 64 Sliding wheel 65 is quickly rotated to the direction of unmanned plane during flying after two fallen in frame mechanism 16；Landing gear mechanism 15 and after first Rear sliding wheel 65 after two in landing gear mechanism 16 accelerates unmanned plane moment, so that two fixed-wings drive unmanned plane upward It slightly hikes up and reduces the impact with ground；Two resets after first after landing gear mechanism 15 and second in landing gear mechanism 16 Spring 52 is compressed；When the speed of unmanned plane reduces to a certain extent, the nose-gear mechanism 14 on unmanned plane starts and ground Face is in contact；Ground faces the impact of nose-gear mechanism 14 so that the first slide 22 in nose-gear mechanism 14 is solid to first It is moved in the first loose slot 18 in reservation 17；Two the first sliding blocks initially enter in two the first ladder chutes 21；Before rise and fall The beginning of tooth bucket 33 in frame mechanism 14 is engaged with the first rack gear 43；First rack gear 43 passes through 33, two first gears 37 of tooth bucket, the Two gears 53 and second driving shaft 36 drive friction pulley 32 and first pulley 31 to rotate；First pulley 31 passes through the first synchronous belt 42, the second belt wheel 39 and third transmission shaft 40 drive two preceding sliding wheels 41 to unmanned plane during flying direction moment high speed rotation, from And improve the sliding speed of nose-gear mechanism 14 and with first after after landing gear mechanism 15 and second landing gear mechanism 16 cunning Scanning frequency degree matches, and avoids the front and back undercarriage speed of unmanned plane inconsistent and turns over machine；When unmanned plane nose-gear mechanism First slide 22 in 14, which is continued up, slides along the first ladder chute 21 and is detached from the first rack gear 43, and preceding sliding wheel 41 no longer adds Speed rotation；It is installed on the friction block 45 in first slide 22 and the 44 phase interaction of limited block on 18 side wall of the first loose slot therewith With；Friction block 45 is slided along the first slide opening 25 into first slide 22, and limit spring 47 is compressed；Imploded arcs on friction block 45 Face is in contact with the periphery of friction pulley 32；The friction pulley 32 of rotation starts moment under the action of friction block 45 and of short duration subtracts Speed；Unmanned plane slows down under the drive of the deceleration of the instant transient of nose-gear mechanism 14；When friction block 45 crosses limited block 44 Afterwards, limit spring 47 drives friction block 45 to be detached from friction pulley 32；Preceding sliding wheel 41 and rear sliding wheel 65 are having no the case where limitation Lower free forward slip is until unmanned slide stopping, nose-gear mechanism 14, the first landing gear mechanism and the second undercarriage machine Reset spring 52 in structure is ready simultaneously by compression and energy storage for the lift-off of unmanned plane next time.

In conclusion beneficial effects of the present invention: unmanned plane is fixed-wing unmanned plane, and only by a steering engine 78 come real Landing gear mechanism 16 stacks after landing gear mechanism 15 and second after existing nose-gear mechanism 14, first；In unmanned plane landing, Steering engine 78 passes through landing gear mechanism 15 and the second landing gear mechanism after the folding drive of driving mechanism 67 nose-gear mechanism 14, first It puts down, is ready for the landing of unmanned plane；The landing gear mechanism 16 after landing gear mechanism 15 and second after the first of unmanned plane Fallen to the ground when starting to slide in advance, after ground faces first after landing gear mechanism 15 and second impact of undercarriage machine so that the Rear sliding wheel 65 after one after landing gear mechanism 15 and second in undercarriage machine accelerates rotation；The lift of two fixed-wings increases, So that the ground shock that undercarriage machine is subject to after landing gear mechanism 15 and second after first is buffered；It is risen before on unmanned plane Fall frame mechanism 14 when being contacted with ground, ground faces the impact of nose-gear mechanism 14 so that sliding before in nose-gear mechanism 14 Take turns 41 of short duration acceleration rotations so that unmanned plane will not because of preceding sliding wheel 41 and rear sliding wheel 65 speed it is inconsistent and turn over Vehicle phenomenon；Then, the preceding sliding wheel 41 in nose-gear mechanism 14 is by of short duration brake, so that the sliding speed of unmanned plane is further Reduce, so that unmanned plane smoothly lands and gradually acceleration and deceleration and stops, reduction high speed impact is to undercarriage to the maximum extent Impact.

Claims

1. a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: it includes body, nose-gear mechanism, the Landing gear mechanism after landing gear mechanism, second after one folds driving mechanism, the 6th gear, driving gear, steering engine, wherein body For existing fixed-wing unmanned plane body；Steering engine passes sequentially through driving gear and the operation of the 6th gear Foldable driving mechanism； Landing gear mechanism is run after landing gear mechanism and second after folding driving mechanism drive nose-gear mechanism, first, to realize Landing gear mechanism stacks after landing gear mechanism and second after nose-gear mechanism, first；After unmanned plane lift-off, steering engine successively leads to It overdrives and gear, the 6th gear and folds driving mechanism and drive nose-gear mechanism, risen after landing gear mechanism and second after first The arc core axis that frame mechanism is fallen around corresponding arc ladder chute is swung to body front upper place, so that nose-gear mechanism, first Afterwards after landing gear mechanism and second landing gear mechanism folding pack up income body in, thus reduce unmanned plane in flight course by The windage arrived, and then improve unmanned plane during flying voyage and speed；

Before unmanned plane landing, steering engine drive nose-gear mechanism, after first after landing gear mechanism and second landing gear mechanism around phase The arc core axis for the arc ladder chute answered is swung to the body back lower place, so that landing gear mechanism after nose-gear mechanism, first Landing gear mechanism is put down after with second, is ready for the landing of unmanned plane；When unmanned plane lands, on unmanned plane first after rise Landing gear mechanism is in advance with ground face contact after falling frame mechanism and second, undercarriage after landing gear mechanism and second after ground faces first A series of transmissions after the impact of mechanism passes through first after landing gear mechanism and second inside landing gear mechanism after first so that rise It falls the rear sliding wheel after frame mechanism and second in landing gear mechanism and accelerates sliding；So that unmanned plane has of short duration acceleration, two solid Determine the wing lift make first after landing gear mechanism is subject to after landing gear mechanism and second ground shock buffered；Unmanned plane As speed slows down, nose-gear mechanism and ground face contact；The impact on ground is so that the preceding sliding wheel in nose-gear mechanism is short Temporarily accelerate, so that the rear cunning after the rotation speed of preceding sliding wheel and first after landing gear mechanism and second in landing gear mechanism Row wheel speed matches, and avoids that unmanned plane excessive velocities and phenomenon of turning a somersault occurs；With slowing down for body sliding speed, Nose-gear mechanism generates of short duration brake；Further such that the sliding speed of unmanned plane slows down and art skating and gradually stops Only.

2. according to claim 1 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned body On offer preceding fixing groove, preceding folded slot, preceding recessing groove, trough of belt, driver slot, the first axial trough, front arc ladder chute, after two Fixing groove, folded slot after two, recessing groove, the second axial trough, two rear arc ladder chutes after two, wherein before fixing groove open up In the lower end of head；Preceding folded slot is provided with the lower end of head, and is located at the side in front of head in preceding folded slot and preceding fixing groove Wall communicates；Preceding recessing groove is provided with the lower end of head, and preceding recessing groove is communicated with the side wall of preceding fixing groove and preceding folded slot simultaneously； Front arc ladder chute, and the lower end surface phase of one end of front arc ladder chute and body are provided on one side wall of preceding recessing groove It is logical；Fixing groove is located at the lower end of two fixed-wings after two, and fixing groove is symmetrical about the median plane of body after two；Two Folded slot is located at the lower ends of two fixed-wings after a, and after two folded slot respectively with two after in fixing groove close to head front Side wall communicate；Folded slot is symmetrical about the median plane of body after two；Recessing groove is located at the lower end of two fixed-wings after two, And recessing groove is communicated with the rear fixing groove of corresponding fixed-wing lower end and rear folded slot respectively after two；After two recessing groove about The median plane of body is symmetrical, and recessing groove is located at the inside of two fixed-wings after two；It is opened up on the side wall of recessing groove after each There is rear arc ladder chute, and one end of rear arc ladder chute is communicated with the lower end surface of body；Driver slot is provided with body Lower end, and driver slot is between recessing groove after two；Trough of belt is provided with the lower end of body, and trough of belt is located at the one of preceding recessing groove Side is simultaneously communicated with driver slot；First axle slot position is on the side wall of preceding recessing groove, and the first axial trough is communicated with trough of belt；Second axial trough is opened Be located on the side wall of the rear recessing groove matched with undercarriage after first, and the second axial trough and driver slot and with second after undercarriage The rear recessing groove matched communicates.

3. according to claim 2 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: risen before above-mentioned It falls at the preceding fixing groove for the lower end that frame mechanism is mounted on body head, and nose-gear mechanism and preceding folded slot and preceding recessing groove phase Cooperation；Landing gear mechanism is symmetrically mounted at the rear fixing groove of the lower end of two fixed-wings after landing gear mechanism and second after first Place, and after first after landing gear mechanism and second landing gear mechanism respectively with the rear folded slot of two fixed-wing lower ends and rear resigning Slot matches；Fold driving mechanism be arranged in body and with rise and fall after landing gear mechanism and second after nose-gear mechanism, first Frame mechanism matches.

4. according to claim 2 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned steering engine It is mounted in the driver slot on body, driving gear is mounted on the output shaft end of steering engine；6th gear is mounted on drive by axis In dynamic slot, and the 6th gear is meshed with driving gear；6th gear is matched with driving gear is folded.

5. according to claim 3 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: risen before above-mentioned Frame mechanism is fallen to slide including the first fixing seat, the first loose slot, the first pendulum slot, the first limiting slot, two the first ladder chutes, first Seat, the first driving groove, the first with holes, the first slide opening, reset circular groove, the first trapezoidal slide block, foot lever, the second driving groove, first axle Hole, first pulley, friction pulley, tooth bucket, transmission circular groove, the second axis hole, second driving shaft, first gear, second gear, first pass Moving axis, the second belt wheel, third transmission shaft, preceding sliding wheel, the first synchronous belt, the first rack gear, limited block, friction block, pressure spring plate, limit Position spring, swing seat, the second slide opening, arc-shaped rack, the trapezoidal draw runner of arc, reset spring, wherein a side of the first fixing seat The lower end in face is provided with the first pendulum slot, offers the first loose slot on the upper surface of the first pendulum slot；In first loose slot two it is opposite Side end face on symmetrically open up there are two the first ladder chute, and the side wall phase of two the first ladder chutes and the first loose slot It cuts；The first limiting slot is offered on the lower end surface of first fixing seat, and the first limiting slot is communicated with the first pendulum slot；First limiting slot It is communicated with the side end face for being provided with the first pendulum slot in the first fixing seat；First fixing seat is fixedly mounted on the preceding fixing groove on body In, and the first pendulum slot in the first fixing seat is matched with preceding folded slot；First is offered on one side end face of first slide Driving groove；It is with holes that first is offered on the lower end surface of first slide；The side opposite with the first driving groove notch in first slide The first slide opening is offered on face, and the first slide opening is communicated with the first driving groove；The inner wall of first slide opening is circumferentially provided with reset circular groove； Symmetrically there are two the first trapezoidal slide blocks for installation on two opposite side end faces of unslotted in first slide；First slide passes through Two the first trapezoidal slide blocks are slidably installed in the first loose slot of the first fixing seat with two the first ladder chutes；The Limited block and the first tooth are separately installed in the two side walls opposite with the first slide opening and the first driving groove notch in one loose slot Item；One end of friction block is round end, and the other end is provided with inner concave arc surface；Friction block is mounted in the first slide opening, and on friction block Round end stretches out the first slide opening and matches with limited block；Pressure spring plate insertion resets in circular groove, and pressure spring plate is nested in the outer of friction block Side is simultaneously connected therewith；Limit spring is nested in the outside of friction block；One end of limit spring is connect with pressure spring plate, the other end and multiple The inner wall of circle of position slot connects；Reset spring is located at the upper end of the first loose slot；One end of reset spring is interior with the first loose slot The upper surface of wall connection, the other end and first slide connects；Transmission circular groove is provided at one end face center of tooth bucket；Tooth bucket it is another The second axis hole is provided at one end face center, and the second axis hole is communicated with transmission circular groove；The periphery of tooth bucket is 360 degree of radians The flank of tooth, inner headed face are the flank of tooth of 360 degree of radians；Friction pulley, first pulley and tooth bucket are mounted on first by second driving shaft In driving groove, and friction pulley and tooth bucket position are in the two sides of first pulley；Friction pulley is matched with inner concave arc surface on friction block；First Belt wheel is located at the first surface with holes；The flank of tooth of the periphery of tooth bucket is matched with the first rack gear；Second gear is nested in On two transmission shafts, and second gear is located in the transmission circular groove on tooth bucket；Two first gears pass through corresponding first respectively and pass Moving axis is mounted on the inner wall of the first driving groove, and two first gears are located in the transmission circular groove on tooth bucket；Each first tooth Wheel is meshed with the inner circle flank of tooth and second gear of tooth bucket simultaneously；The second driving groove, and the second driving groove and foot are provided in foot lever The upper surface of bar communicates；The first shaft hole of perforation is provided between two opposite side end faces of the lower end of foot lever；Foot lever is mounted on The second driving groove notch on the lower end surface of first slide, and on foot lever upper surface and first on first slide lower end surface are with holes Docking；Second belt wheel is mounted at the lower end first shaft hole of the second driving groove by third transmission shaft, and the two of third transmission shaft First shaft hole is stretched out at end；Two preceding sliding wheels are mounted on the both ends of third transmission shaft；First pulley and the second belt wheel pass through first Synchronous belt establishes drive connection；The second slide opening of perforation is provided between the upper and lower end face of swing seat；Swing seat is nested by the second slide opening In the outside of foot lever；The trapezoidal draw runner of arc is installed on one side end face of arc-shaped rack；Arc-shaped rack passes through the trapezoidal cunning of arc Item is slidably installed in preceding recessing groove with the front arc ladder chute in preceding recessing groove, and the lower end of arc-shaped rack and pendulum The side end face of seat is connected.

6. according to claim 5 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned first The inner components of landing gear mechanism are identical as the inner components of landing gear mechanism after second afterwards；Landing gear mechanism after first The internal structure of landing gear mechanism is symmetrical about the median plane of body after internal structure and second；For landing gear mechanism after first For, it includes the second fixing seat, the second loose slot, the second pendulum slot, the second limiting slot, the second ladder chute, second slide, biography Dynamic chamber, the second with holes, gear hole, the second trapezoidal slide block, one-way clutch, rear sliding wheel, the second rack gear, foot lever, the second transmission Slot, first shaft hole, first pulley, tooth bucket, transmission circular groove, the second axis hole, second driving shaft, first gear, second gear, first Transmission shaft, third transmission shaft, the first synchronous belt, swing seat, the second slide opening, arc-shaped rack, the trapezoidal draw runner of arc, is answered at the second belt wheel Position spring, wherein offering the second loose slot in the second fixing seat；The side end face lower end of second fixing seat offers second Slot is put, and the second pendulum slot is communicated with the second loose slot being positioned above；The lower end surface of second fixing seat is provided with the second limiting slot, And second limiting slot be positioned above second pendulum slot communicate；The second pendulum slot is provided on second limiting slot and the second fixing seat Side end face communicates；Second ladder chute there are two symmetrically being opened on two opposite side walls of the second loose slot, and two second Ladder chute is tangent with the side wall in the second pendulum slot respectively；Second fixing seat passes through landing gear mechanism after the upper end insertion and first In the rear fixing groove matched, and the second pendulum slot is docked with corresponding rear folded slot；Drive cavity is offered in second slide；Second It is provided with second with holes on the lower end surface of slide, and second with holes communicates vertically with drive cavity；On one side end face of second slide It is provided with gear hole, and gear hole is laterally communicated with drive cavity；Two adjacent with the side end face for being provided with gear hole in second slide Symmetrically there are two the second trapezoidal slide blocks for installation on opposite side end face；Second slide passes through two the second trapezoidal slide blocks and two Second ladder chute is slidably installed in the second loose slot；Second rack gear is mounted in the second loose slot, and the second tooth Item is opposite with the gear hole in second slide；First pulley and tooth bucket are mounted in drive cavity by second driving shaft, and first Belt wheel is located at the second surface with holes, and the outer circle flank of tooth of tooth bucket stretches out gear hole and matches with the second rack gear；Second gear peace On second driving shaft, and second gear is located in the transmission circular groove of tooth bucket；Two first gears are passed by corresponding first Moving axis is mounted on the side wall of drive cavity；Two first gears are located in the transmission circular groove of tooth bucket, and each first gear is simultaneously It is meshed with the inner circle flank of tooth and second gear of tooth bucket；Foot lever is connected by end face thereon and the lower end surface of second slide, and foot The second driving groove notch on bar with second on second slide lower end surface is with holes docks；Second belt wheel is pacified by third transmission shaft Mounted in the lower end of the second driving groove, and the first shaft hole of foot lever lower end is stretched out at the both ends of third transmission shaft respectively；Third transmission shaft Both ends be separately installed with an one-way clutch；Rear sliding wheel is nested on the periphery of each one-way clutch；First band Wheel and the second belt wheel form drive connection by the connection of the first synchronous belt；Swing seat is nested on the outside of foot lever；Arc-shaped rack A side end face on the trapezoidal draw runner of arc is installed；Arc-shaped rack passes through in the trapezoidal draw runner circular arc of arc accordingly rear recessing groove Rear ladder chute be slidably installed in rear recessing groove, and the lower end of arc-shaped rack and a side end face of swing seat are solid Even.

7. according to claim 6 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned folding Driving mechanism includes the 4th transmission shaft, third gear, third belt wheel, the 4th gear, the 4th belt wheel, the 5th transmission shaft, the 5th tooth Wheel, the second synchronous belt, wherein the 4th transmission shaft is embedded in the second axial trough on body；Two the 4th gears are separately mounted to the 4th The both ends of transmission shaft, and two the 4th gears be located at two after in recessing groove；Two the 4th gears respectively with first after rise The arc-shaped rack after frame mechanism and second in landing gear mechanism is fallen to be meshed；Third gear and third belt wheel are mounted on the 4th transmission On axis, and third gear and third belt wheel are located in the driver slot on body；Third gear is meshed with the 6th gear；5th passes Moving axis is embedded in the first axial trough；4th belt wheel and the 5th gear are separately mounted to the both ends of the 5th transmission shaft；5th gear is located at In preceding recessing groove, and the 5th gear is meshed with the arc-shaped rack in nose-gear mechanism；4th belt wheel is located in trough of belt, and the Four belt wheels form drive connection by the second synchronous belt and third belt wheel.

8. according to claim 7 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned third The transmission ratio of belt wheel and the 4th belt wheel is 1:1.

9. according to claim 7 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned third The transmission ratio of gear and driving gear is 1:1.

10. according to claim 7 a kind of with the fixed-wing unmanned plane for folding undercarriage, it is characterised in that: above-mentioned the The diameter of four gears is equal with the diameter of the 5th gear.