CN109229346A - A kind of buffer unit suitable for miniature unmanned vehicle oil gas damping type undercarriage - Google Patents
A kind of buffer unit suitable for miniature unmanned vehicle oil gas damping type undercarriage Download PDFInfo
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- CN109229346A CN109229346A CN201810989396.5A CN201810989396A CN109229346A CN 109229346 A CN109229346 A CN 109229346A CN 201810989396 A CN201810989396 A CN 201810989396A CN 109229346 A CN109229346 A CN 109229346A
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- inner cylinder
- end cap
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- damping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
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- Aviation & Aerospace Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of buffer units suitable for miniature unmanned vehicle oil gas damping type undercarriage, belong to technical field of aircraft design.The buffer unit includes outer barrel component and interior cartridge module, has an end cap large through-hole among the inner cylinder end cap in interior cartridge module, more than one end cap small through hole is distributed in inner cylinder end cap surrounding；The needle body of damping needle after the end cap large through-hole among inner cylinder end cap by stretching out, needle stand is located at the lower section of inner cylinder end cap, damping needle nut is screwed on needle body, the thickness that the distance between needle nut lower surface and needle stand upper surface are greater than inner cylinder end cap is damped, the intermediate axial with damping needle through-hole of needle is damped.Buffer unit provided by the present invention, it is improved at inner cylinder end cap, damping needle and damping needle nut, the overall structure of buffer unit is simplified while keeping good function, so that the miniature unmanned vehicle of the buffer unit flexible adaptation difference take-off weight, increases its adaptability.
Description
Technical field
The invention belongs to technical field of aircraft design, and in particular to one kind is suitable for the damping of miniature unmanned vehicle oil gas
The buffer unit of formula undercarriage.
Background technique
In recent years, unmanned vehicle is because of its low cost, miniaturization, multi-functional feature, increasingly by aircraft designer
Attention, more and more scientific research institutions enter the field of unmanned vehicle development and design.The unmanned flight of various models
Device emerges one after another, and purposes is also more extensive.The instrument and equipment value that unmanned vehicle is loaded now is higher and higher, for reduction
The considerations of cost and flight safety, requirement of the unmanned plane for flight reliability are also higher and higher.Landing take off as aircraft
Two mostly important stages, the influence for aircraft flight reliability are very huge in flight course.Can aircraft pacify
Can full landing be directly related to onboard instrument equipment and work normally and one of the important prerequisite of safe flight.
Undercarriage is aircraft to be supported when aircraft lower part lands for taking off or slides (ground or the water surface) and for moving
The accessories apparatus of dynamic (ground or the water surface).Undercarriage is a kind of unique component for supporting whole frame aircraft, is that aircraft realizes cunning
It runs and the indispensable a part of landing.The height of undercarriage performance directly determines the quality of aircraft takeoff and landing performance.Typical case flies
Machine undercarriage generally includes the components such as buffer, wheel, draw off gear, up and or down locks brake.
Buffer is the component of modern undercarriage indispensability, and buffer basic role is in aircraft lands or suction when sliding
The energy generated with ground shock is received, the effect of damping is played.Modern undercarriage buffer can be divided into according to damping formal classification
Solid bumper and fluid spring formula buffer.Solid bumper can be divided into steel spring buffer and rubber
Spring buffer etc..Fluid spring formula buffer can be divided into gas spring buffer, liquid spring buffer and hydro-pneumatic spring
Buffer.When hydro-pneumatic spring buffer basic principle is that buffer is pressurized, the internally-damped oil of buffer is mutually squeezed with high pressure gas
Pressure, the impact energy for being subject to undercarriage when damping oil flows through damping unit dissipate.Hydro-pneumatic spring buffer damping effect is good
Good, reliable operation, buffering are high-efficient, are obtained on modern large aircraft using it as the oil gas damping type undercarriage of core component
It is widely applied.But because its structure is complicated, difficulty of processing is high.Oil gas damping type undercarriage encounters much on the road of miniaturization
It is difficult.
In the prior art for miniature unmanned vehicle, it is reliable to provide that there is no a set of more sound landing gear assemblies
Shock-absorbing function.
Summary of the invention
The present invention provides one kind and has good damping effect for the safe landing and sliding race demand of miniature unmanned vehicle
And the buffer unit of the oil gas damping type undercarriage of higher maintainability.The buffer unit packet of the oil gas damping type undercarriage
Outer barrel component and interior cartridge module are included, the outer barrel component includes outer cylinder, outer cylinder pivoted arm, steering engine frame, steering ring, fixed ring, outer cylinder
End cap, steering-engine, steering link, shaft hole and metal arm；The interior cartridge module include inner cylinder, interior cylinder piston, inner cylinder end cap,
Damp needle, damping needle nut, supporting ring, toggle C, gas-charging connection and toggle D under supporting ring, inner cylinder on inner cylinder.
The outer cylinder is hollow ladder barrel structure, and outer cylinder top half outer diameter is less than outer cylinder lower half portion outer diameter, institute
The closing of outer cylinder upper surface, outer cylinder lower surface opening are stated, the setting of outer cylinder top half side fills oilhole, the setting of outer cylinder upper surface
Oil outlet；Outer cylinder top half is fixed with metal arm, and there are two shaft holes for tool on the metal arm, and two shaft holes are about outer cylinder
Central symmetry, two shaft holes are coaxial；The outer end face of one of shaft hole is machined with mortise, and the outer cylinder pivoted arm passes through mortise
Agree with the shaft hole, is successively socketed with steering engine frame, steering ring, fixed ring and outer cylinder from top to bottom in the outer cylinder lower half portion
End cap；The steering engine frame is flat sheet, and the circle among outer cylinder lower half portion, the steering engine frame is covered by the circular hole that centre has
Hole internal diameter is equal to outer cylinder lower half portion outer diameter, and steering-engine after connecting between the screw hole on screw and steering engine frame by being fixed on
On steering engine frame, ring set cylinder lower half portion outside is turned to, is located at below steering engine frame, the steering ring internal diameter is equal to outer cylinder lower half portion
Outer diameter, the steering ring two sides respectively have an auricle respectively, and respectively auricle A and auricle B, auricle A and auricle B size are not
Together, there is auricle A horizontal direction auricle through-hole F, auricle B to have vertical direction auricle through-hole G, auricle through-hole F and auricle through-hole G
Through-hole direction it is different, the auricle A of side is connected by corresponding auricle through-hole F with the upper end of the toggle D in interior cartridge module,
The auricle B of the other side is connected by corresponding auricle through-hole G with one end of steering link, the other end and steering rudder of steering link
Machine is connected, and the fixed ring and outer cylinder end cap covered on the outside of outer cylinder lower half portion is followed successively by below steering ring, and fixed ring internal diameter is equal to
Outer cylinder lower half portion outer diameter passes through top wire hole by jackscrew and is fixed on outer cylinder；Outer cylinder end cap has internal screw thread, and outer cylinder end cap is logical
It crosses the internal screw thread and matches threaded connection with the external screw thread of outer cylinder lower half portion.
Inner cylinder is hollow ladder barrel structure, and inner cylinder top half outer diameter is less than inner cylinder lower half portion outer diameter, on inner cylinder
Half part outer diameter and inner cylinder lower half portion outer diameter are respectively less than outer cylinder internal diameter, and interior cylinder piston is located inside inner cylinder and realizes in inner cylinder
Portion's sliding, inner cylinder top half are located in outer cylinder, and supporting ring and supporting ring under inner cylinder are annular shape on inner cylinder, are respectively fitted on inner cylinder
On the outside of half part, supporting ring is located under inner cylinder above supporting ring on inner cylinder, and supporting ring is with supporting ring under inner cylinder along inner cylinder axial length on inner cylinder
The sum of be equal to inner cylinder top half along the length of inner cylinder axial direction, supporting ring outer diameter is equal to outer cylinder internal diameter along inner cylinder, on inner cylinder in supporting ring
Diameter is equal to inner cylinder top half outer diameter, and supporting ring internal diameter is equal to inner cylinder top half outer diameter under inner cylinder, and supporting ring outer diameter is equal under inner cylinder
Outer cylinder internal diameter；Supporting ring lateral wall is provided with more than one diversion trench along axial direction on inner cylinder, and inner cylinder end cap is by being threaded on inner cylinder
End；Inner cylinder end cap lower half portion diameter inside inner cylinder is equal to inner cylinder internal diameter, the inner cylinder end cap upper half at the top of inner cylinder
Section diameter is less than outer cylinder internal diameter and is greater than supporting ring internal diameter on inner cylinder, has an end cap large through-hole among inner cylinder end cap, described
Inner cylinder end cap surrounding is evenly distributed with more than one end cap small through hole；Damping needle includes needle stand and needle body two parts, needle stand it is straight
Diameter is less than inner cylinder internal diameter and is greater than the maximum value of the diameter of end cap small through hole position, and needle body diameter is equal to the inner cylinder end cap
Intermediate end cap large through-hole diameter, needle stand are located at the lower section of inner cylinder end cap, and needle body passes through end cap large through-hole below inner cylinder end cap
After stretch out, damping needle nut is screwed on needle body, damping the distance between needle nut lower surface and needle stand upper surface are greater than inner cylinder
The thickness of end cap has axial damping needle through-hole, toggle C in order to which needle body moves in end cap large through-hole among damping needle
It is connect by lower end with auricle through-hole H possessed by the auricle E of inner cylinder lower half portion side, the upper end of toggle C and toggle D
Lower end be connected, the upper end of toggle D and auricle through-hole F phase possessed by the auricle A for covering the steering ring side on outer cylinder
Even；There is aeration aperture, in one end Jie aeration aperture of gas-charging connection on inner cylinder lateral wall between inner cylinder bottom and interior cylinder piston.
The needle stand surrounding of the damping needle axially has needle stand through-hole, when needle stand upper surface is bonded with inner cylinder end cap lower surface
When, needle stand through-hole does not penetrate through with the end cap small through hole on inner cylinder end cap.
End cap large through-hole axial movement of the needle body of needle in inner cylinder end cap is damped, when damping needle movement to lower limit,
Damping needle nut is bonded with inner cylinder end cap upper surface, the end cap small through hole of inner cylinder end cap surrounding distribution and the damping among damping needle
Needle through-hole is in breakthrough status, and the lower limit is that damping needle moves to greatest extent axially downwards along inner cylinder end cap；Work as damping
When needle movement is to upper limit, the needle stand upper surface for damping needle is bonded with inner cylinder end cap lower surface, by the end cap of inner cylinder end cap surrounding
Small through hole shelters from, i.e., for the damping needle through hole only among damping needle in breakthrough status, the upper limit is damping needle in
End cap large through-hole in cylinder end cap axially upwardly moves to greatest extent, when damping needle is in upper limit, damps under needle nut
Between surface and inner cylinder end cap upper surface existing distance be damp needle needle body can stretch inside inner cylinder end cap away from
From.
The interior cylinder piston is located in inner cylinder, before buffer unit work, the needle stand of inner cylinder piston upper surface and damping needle
Lower surface fitting；Aeration aperture inner sidewall and gas-charging connection contact position have O-ring seal；The inner sidewall and filling oil of the oil outlet
The inner sidewall in hole all has O-ring seal；Radially with annular recess among the internal screw thread, the annular recess and interior
O-ring is all had in the escape of screw thread.
The invention has the advantages that:
1, oil gas damping type undercarriage buffer unit structure provided by the present invention is simple, is keeping the same of good function
When, it is improved at inner cylinder end cap, damping needle and damping needle nut, simplifies the overall structure of buffer unit, solve existing
The difficult points such as structure is complicated, processing difficulties can be suitable for the unmanned vehicle of miniature (100kg rank), fill up the grade
The blank in terms of unmanned vehicle oil gas damping type undercarriage is not descended；
2, it while guaranteeing damping effect, is connect respectively in filling oilhole and oil outlet, outer cylinder end cap, interior cylinder piston, inflation
It has selected the O-ring of suitable size to be sealed at head, has realized Oil-gas Separation interfacial seal and oil seal and hermetic seal, reach
Preferable sealing effect is arrived；
3, by the way that the size for being filled with high pressure gas pressure and the how much control undercarriage buffer units for filling oil mass controlled
Stroke and rated load it is suitable to increase it so that the miniature unmanned vehicle of the buffer unit flexible adaptation difference take-off weight
Ying Xing.
Detailed description of the invention
Fig. 1 is outer barrel component structural schematic diagram in buffer unit provided by the invention；
Fig. 2 is interior cartridge module structural schematic diagram in buffer unit provided by the invention；
Fig. 3 is the overall structure diagram of buffer unit provided by the invention after the assembly is completed；
Fig. 4 is the overall structure cross-sectional view of buffer unit provided by the invention after the assembly is completed；
Fig. 5 is status diagram when oil pressure is higher than air pressure in the present invention；
Fig. 6 is status diagram when air pressure is higher than oil pressure in the present invention；
In figure:
1, outer cylinder；2, outer cylinder pivoted arm；3, steering engine frame；4, steering ring；5, fixed ring；
6, outer cylinder end cap；7, steering-engine；8, steering link；9, shaft hole；10, metal arm；
11, inner cylinder；12, interior cylinder piston；13, inner cylinder end cap；14, needle is damped；15, needle nut is damped；
16, supporting ring on inner cylinder；17, supporting ring under inner cylinder；18, toggle C；19, gas-charging connection；20, oil outlet；
21, oilhole is filled；22, auricle A；23, auricle B；24, toggle D；25, auricle E；
26, fixing piece；27, end cap large through-hole；28, end cap small through hole；29, needle stand；30 needle bodies；
31, needle through-hole is damped；32, aeration aperture；33, auricle through-hole F；34, auricle through-hole G；35, auricle through-hole H.
Specific embodiment
With reference to the accompanying drawing to designed by the present invention be suitable for miniature (100kg rank) unmanned vehicle oil gas damping type
The buffer unit of undercarriage is further elaborated.
The present invention, which provides, a kind of to be had good damping effect and higher maintainable is suitable for miniature unmanned vehicle
The buffer unit of oil gas damping type undercarriage, the buffer unit of the oil gas damping type undercarriage include outer barrel component and inner cylinder group
Part, as shown in Figure 1, the outer barrel component includes outer cylinder 1, outer cylinder pivoted arm 2, steering engine frame 3, steering ring 4, fixed ring 5, outer cylinder end cap
6, steering-engine 7, steering link 8, shaft hole 9 and metal arm 10；As shown in Fig. 2, the interior cartridge module includes inner cylinder 11, inner cylinder
Piston 12, inner cylinder end cap 13, damping needle 14, damping needle nut 15, supporting ring 17 under supporting ring 16, inner cylinder on inner cylinder, toggle C18,
Gas-charging connection 19 and toggle D24.
As shown in Figure 1, the outer cylinder 1 is hollow ladder barrel structure, 1 top half outer diameter of outer cylinder is less than outer cylinder lower half
Segment outer radius, 1 upper surface of the outer cylinder closing, 1 lower surface of outer cylinder opening, 1 top half side of the outer cylinder setting fill oilhole
21, oil outlet 20 is arranged in 1 upper surface of outer cylinder.The inner sidewall of the oil outlet 20 and the inner sidewall for filling oilhole 21 all have O-shaped close
Seal.1 top half of outer cylinder is fixed with metal arm 10, and there are two shaft holes 9, two shaft holes 9 to close for tool on the metal arm 10
In 1 central symmetry of outer cylinder, two shaft holes 9 are coaxial.The outer end face of one of shaft hole 9 is machined with mortise, and the outer cylinder turns
Arm 2 is agreed with the shaft hole 9 by mortise, the outer cylinder pivoted arm 2 for realizing undercarriage folding and unfolding.Each shaft hole 9
Side has top wire hole, and the shaft being connected with housing construction passes through two coaxial shaft holes 9, and guarantees that rotating shaft position is high
In 1 upper surface of outer cylinder.It is successively socketed with steering engine frame 3, steering ring 4,5 and of fixed ring from top to bottom in 1 lower half portion of outer cylinder
Outer cylinder end cap 6.The steering engine frame 3 is flat sheet, is covered by the circular hole that centre has in 1 lower half portion of outer cylinder, the steering engine frame 3
Intermediate bore inner diameter is equal to 1 lower half portion outer diameter of outer cylinder, and 3 side of steering engine frame is solid between the steering engine frame 3 and outer cylinder 1 with making
Fixed top wire hole, steering-engine 7 after connecting between the screw hole on screw and steering engine frame 3 by being fixed on steering engine frame 3, outer cylinder
The fixing piece 26 being fixedly connected with undercarriage is cased on 1, fixing piece 26 is located at 3 top of steering engine frame.4 sets of steering ring under outer cylinder 1
Half part, is located at 3 lower section of steering engine frame, and 4 internal diameter of steering ring is equal to 1 lower half portion outer diameter of outer cylinder, rotates around outer cylinder 1.It is described
4 two sides of steering ring respectively have an auricle respectively, and respectively auricle A22 and auricle B23, auricle A22 and auricle B23 size are not
Together, there is auricle A22 horizontal direction auricle through-hole F33, auricle B23 to have vertical direction auricle through-hole G34, auricle through-hole F33
Different from the through-hole direction of auricle through-hole G34, the auricle A22 of side passes through in corresponding auricle through-hole F33 and interior cartridge module
The upper end of toggle D24 is connected, one end phase that the auricle B23 of the other side passes through corresponding auricle through-hole G34 and steering link 8
Even, the other end of steering link 8 is connected with steering-engine 7, is followed successively by and is covered on the outside of 1 lower half portion of outer cylinder below steering ring 4
Fixed ring 5 and outer cylinder end cap 6, fixed ring 5 are the annulus shape that side has top wire hole, and 5 internal diameter of fixed ring is equal to 1 lower half of outer cylinder
Segment outer radius passes through top wire hole by jackscrew and is fixed on outer cylinder 1.Outer cylinder end cap 6 has internal screw thread, and outer cylinder end cap 6 passes through institute
It states internal screw thread and matches threaded connection with the external screw thread of 1 lower half portion of outer cylinder.Radially with cyclic annular recessed among the internal screw thread
O-ring seal is all had in the escape of slot, the annular recess and internal screw thread.
As shown in Fig. 2, inner cylinder 11 is hollow ladder barrel structure, 11 top half outer diameter of inner cylinder is less than 11 lower half of inner cylinder
Segment outer radius, 11 top half outer diameter of inner cylinder and 11 lower half portion outer diameter of inner cylinder are respectively less than 1 internal diameter of outer cylinder, and interior cylinder piston 12 is located at
Inside inner cylinder 11 and realize in 11 internal slide of inner cylinder.11 top half of inner cylinder is located in outer cylinder 1, supporting ring 16 and inner cylinder on inner cylinder
Lower supporting ring 17 is annular shape, is respectively fitted on the outside of 11 top half of inner cylinder, and supporting ring 16 is located under inner cylinder on supporting ring 17 on inner cylinder
Square, supporting ring 16 is equal to 11 top half of inner cylinder along 11 axis of inner cylinder along the sum of 11 axial length of inner cylinder with supporting ring 17 under inner cylinder on inner cylinder
To length, 16 outer diameter of supporting ring is equal to 1 internal diameter of outer cylinder on inner cylinder, and 16 internal diameter of supporting ring is equal to outside 11 top half of inner cylinder on inner cylinder
Diameter, 17 internal diameter of supporting ring is equal to 11 top half outer diameter of inner cylinder under inner cylinder, and 17 outer diameter of supporting ring is equal to 1 internal diameter of outer cylinder under inner cylinder.Inner cylinder
Upper 16 lateral wall of supporting ring is provided with more than one diversion trench along axial direction, and inner cylinder end cap 13 is by being threaded onto 11 upper end of inner cylinder；It is located at
13 lower half portion diameter of inner cylinder end cap inside inner cylinder 11 is equal to 11 internal diameter of inner cylinder, on the inner cylinder end cap 13 at 11 top of inner cylinder
Half part diameter is less than 1 internal diameter of outer cylinder and is greater than 16 internal diameter of supporting ring on inner cylinder, has an end cap logical greatly among inner cylinder end cap 13
Hole 27,13 surrounding of inner cylinder end cap are evenly distributed with more than one end cap small through hole 28；Damping needle 14 includes needle stand 29 and needle
The diameter of 30 two parts of body, needle stand 29 is less than 11 internal diameter of inner cylinder and is greater than the maximum of the diameter of 28 position of end cap small through hole
Value, 30 diameter of needle body are equal to 27 diameter of end cap large through-hole among the inner cylinder end cap 13, and needle stand 29 is located at inner cylinder end cap 13
Lower section, needle body 30 stretch out after passing through end cap large through-hole 27 below inner cylinder end cap 13, and damping needle nut 15 is screwed on needle body 30,
The thickness that the distance between 15 lower surface of needle nut and 29 upper surface of needle stand are greater than inner cylinder end cap 13 is damped, in order to which needle body 30 exists
It is moved in end cap large through-hole 27, damping among needle 14 has axial damping needle through-hole 31, and 29 surrounding of needle stand for damping needle 14 is axial
With needle stand through-hole, when 29 upper surface of needle stand is bonded with 13 lower surface of inner cylinder end cap, on needle stand through-hole and inner cylinder end cap 13
End cap small through hole 28 does not penetrate through.When buffer unit ideally full extension, propped up under 6 upper surface of outer cylinder end cap and inner cylinder
17 lower surface of ring is axially contact, and 16 upper surface of supporting ring is contacted with inner cylinder end cap 13 on inner cylinder, for limiting the stretching, extension of buffer unit
Stroke.Toggle C18 is connect by lower end with auricle through-hole H35 possessed by the auricle E25 of 11 lower half portion side of inner cylinder, is turned round
The upper end of arm of force C18 is connected with the lower end of toggle D24, the upper end of toggle D24 and covers the steering ring 4 one on outer cylinder 1
Auricle through-hole F33 possessed by the auricle A22 of side is connected.On 11 lateral wall of inner cylinder between 11 bottom of inner cylinder and interior cylinder piston 12
With aeration aperture 32, the aeration aperture 32 is independent of each other with auricle E25, in 19 1 end Jie aeration aperture 32 of gas-charging connection, inflation
32 inner sidewall of hole has O-ring seal for sealing with 19 contact position of gas-charging connection, 19 other end of gas-charging connection and external air pump
It is connected, for being inflated for inner cylinder 11.
As shown in figure 3, the outer barrel component and interior cartridge module are assembled to form buffer unit, specific assembling process are as follows: first
Interior cylinder piston 12 is put on into O-ring seal to guarantee the effect of Oil-gas Separation, interior cylinder piston 12 is placed in inside inner cylinder 11, it is ensured that
It can smoothly be moved back and forth inside inner cylinder 11 while guaranteeing air-tightness.Then the needle body 30 of needle 14 will be damped under
It is screwed on to the upper end cap large through-hole 27 among inner cylinder end cap 13, and by damping needle nut 15.Damp 30 edge of needle body of needle 14
End cap large through-hole 27 in inner cylinder end cap 13 moves axially, when damping needle 14 and moving to lower limit, damping needle nut 15 with it is interior
The fitting of cylinder 13 upper surface of end cap, the end cap small through hole 28 and the damping needle through-hole among damping needle 14 of the distribution of 13 surrounding of inner cylinder end cap
31 are in breakthrough status；The lower limit is that damping needle 14 moves to greatest extent axially downwards along inner cylinder end cap 13.Work as damping
When needle 14 moves to upper limit, 29 upper surface of needle stand of damping needle 14 is bonded with 13 lower surface of inner cylinder end cap, by inner cylinder end cap 13
The end cap small through hole 28 of surrounding shelters from, i.e., the damping needle through-hole 31 only among damping needle 14 is in breakthrough status.On described
Limit is axially upwardly moved to greatest extent for end cap large through-hole 27 of the damping needle 14 in inner cylinder end cap 13, at damping needle 14
When upper limit, damping existing distance between 15 lower surface of needle nut and 13 upper surface of inner cylinder end cap is the needle for damping needle 14
The distance that body 30 can move inside inner cylinder end cap 13, that is, the stroke between upper limit and lower limit.It is connect by inflation
First 19 are connected with external air pump, are that high pressure gas is full of in inner cylinder 11；The air-tightness of cylinder piston 12 in checking simultaneously.It then will be outer
6 sets of end cap of cylinder is in 11 lower half portion of inner cylinder, then the successively supporting ring 16 on supporting ring 17 and inner cylinder under inner cylinder on 11 outer sheath of inner cylinder, interior
Supporting ring 16 is respectively positioned on 6 top of outer cylinder end cap with supporting ring 17 under inner cylinder on cylinder, and supporting ring 16 is with supporting ring 17 under inner cylinder for limiting on inner cylinder
The stretching, extension of buffer unit processed, ideally, when 16 upper surface of supporting ring is contacted with inner cylinder end cap 13 on inner cylinder, the buffering dress
It is limited to set stretching, extension；When distance minimum between 1 inner wall upper surface of 13 upper surface of inner cylinder end cap and outer cylinder, the buffer unit is shunk
It is limited.The fixed inner cylinder end cap 13 equipped with damping needle 14 and damping needle nut 15 in 11 upper surface of inner cylinder.Again successively by fixed ring 5,
Steering ring 4 and steering engine frame 3 are mounted on outer cylinder end cap 6, then 1 entirety of outer cylinder is inserted in fixed ring 5, steering ring 4 and steering engine frame 3
And it is threaded on outer cylinder end cap 6；Steering-engine 7 is fixed by screws on steering engine frame 3,8 one end of steering link and steering
Steering engine 7 is connected, and 8 other end of steering link is connected with the auricle B23 on swivel becket 4；The outer cylinder pivoted arm 2, turns to steering ring 4
Steering engine 7, steering link 8 and buffer unit other structures, which cooperatively act on, realizes undercarriage turning function, finally by outer cylinder 1
The filling oilhole 21 of top half lateral surface pours into damping oil, and damping oil enters inside outer cylinder 1, overflows to damping oil from oil outlet 20
Afterwards, oilhole 21 and oil outlet 20 will be filled with screw and blocks that (described pour into fills oil using funnel, and pasta is higher than oil outlet, and oil can
To be overflowed from oil outlet 20).The lower end toggle C18 is connect with the auricle E25 of 11 lower half portion side of inner cylinder, toggle C18
Upper end is connected with the lower end of toggle D24, and the upper end of toggle D24 is connected with the auricle through-hole on auricle A22.Outer cylinder pivoted arm
2 shaft holes 9 for being machined with mortise with one of outer end face on outer cylinder 1 connect together, and form an entirety with buffer unit,
When external force rotates outer cylinder pivoted arm 2, outer cylinder 1 and outer cylinder pivoted arm 2 can rotate around the axis together, realize the folding and unfolding of undercarriage
Operation.Axially position is realized by jackscrew between outer cylinder pivoted arm 2 and shaft；Steering engine frame 3 is circumferentially positioned to guarantee by jackscrew, rises
To the effect of support steering-engine 7.Steering ring 4 can circumferentially be rotated along outer cylinder 1.Steering-engine 7 is by driving the company of steering
Bar 8 drives steering ring 4 to rotate in the upper surface of fixed ring 5 in turn.Fixed ring 5 is withstood on the outside of 1 lower half portion of outer cylinder by jackscrew
It realizes positioning, is used to support steering ring 4.Outer cylinder end cap 6 is threadedly secured to 1 lower half portion of outer cylinder, and outer cylinder end cap 6 has interior
Screw thread all has O-ring seal in the escape of annular recess and internal screw thread radially with annular recess among internal screw thread
To realize sealing effect, prevent damping oil from revealing.External oil pump will be hindered by the filling oilhole 21 of 1 top half lateral surface of outer cylinder
Buddhist nun's oil pours into inside outer cylinder 1, and damping oil is filled and after the oil outlet 20 of 1 upper surface of outer cylinder spilling, will fill oilhole 21 with screw
It is blocked with oil outlet 20.The cross-sectional view of the buffer unit after the assembly is completed is as shown in Figure 4.
As shown in figure 5, high pressure gas will be full of in inner cylinder 11 by damping oil is filled in outer cylinder 1.It works in buffer unit
Before, interior 12 upper surface of cylinder piston is bonded with 29 lower surface of needle stand of damping needle 14, damping oil and high pressure gas is separated, inner cylinder
Piston 12 is above damping oil, and here is high pressure gas, and the air pressure inside inner cylinder 11 is higher than the oil pressure inside outer cylinder 1.When rising and falling
When frame is landed, impacted, inner cylinder 11 is axially moved upwards with respect to outer cylinder 1, and then compresses the damping oil in outer cylinder 1.This
When outer cylinder 1 inside oil pressure be higher than inner cylinder 11 inside air pressure, pressure difference effect under damping needle 14 start transport axially downward
It is dynamic, it is gradually disengaged between 29 upper surface of needle stand and 13 lower surface of inner cylinder end cap by being bonded at this time, end cap small through hole 28 penetrates through, and first
Part damping oil enters 29 upper surface of needle stand and inner cylinder end by outer cylinder 1 by the end cap small through hole 28 opened in 13 surrounding of inner cylinder end cap
Between 13 lower surface of lid, subsequently into inner cylinder 11, second part damping oil by the damping needle through-hole 31 among damping needle 14 by
Outer cylinder 1 is directly entered inner cylinder 11, since inner cylinder 11 moves upwards, drives on inner cylinder that supporting ring 17 is transported upwards under supporting ring 16 and inner cylinder
Dynamic, Part III damping oil is led by what is opened on supporting ring 16 on gap between 1 inner wall of inner cylinder end cap 13 and outer cylinder and inner cylinder
Chute flows into the gap under inner cylinder between 1 inner wall of 17 outer wall of supporting ring and outer cylinder.Flow into first part's damping inside inner cylinder 11
Oil and second part damping oil compress jointly in cylinder piston 12, interior cylinder piston 12 with respect to 11 axial downward movement of inner cylinder, and then by
High pressure gas inside step compression inner cylinder 11.
As shown in fig. 6, the high pressure gas inside inner cylinder 11 is compressed, the air pressure inside inner cylinder 11 is higher than outer cylinder 1
Internal oil pressure.Under pressure difference effect, the opposite inner cylinder 11 of interior cylinder piston 12 starts to move upwards, and will flow into the first of inner cylinder 11
End cap small through hole 28 that part damping oil and second part damping oil are opened in 13 surrounding of inner cylinder end cap inside inner cylinder 11 and
Damping needle through-hole 31 among damping needle 14 pushes back among outer cylinder 1, and when the damping oil in outer cylinder 1 gradually increases, damping oil is downward
Inner cylinder 11 is compressed, inner cylinder 11 starts to move downward with respect to outer cylinder 1.First part's damping oil and second part damping oil are back to outer
Squeezed air-damping needle 14 moves upwards during cylinder 1, until damping needle 14 moves to upper limit, table on the needle stand 29 of damping needle 14
Face is bonded with 13 lower surface of inner cylinder end cap, and the needle stand 29 that 13 surrounding end cap small through hole 28 of inner cylinder end cap is all damped needle 14 blocks
Firmly, at this point, not being back to first part's damping oil of outer cylinder 1 and second part damping oil can only damp among needle 14 from being located at
Damping needle through-hole 31 continues to be back in outer cylinder 1；During inner cylinder 11 moves downward simultaneously, Part III damping oil is under inner cylinder
Pass through gap and the inner cylinder between 1 inner wall of inner cylinder end cap 13 and outer cylinder in gap between 1 inner wall of 17 outer wall of supporting ring and outer cylinder
The diversion trench opened on upper supporting ring 16 is back in outer cylinder 1, the oil pressure since the air pressure inside inner cylinder 11 at this time is high, inside outer cylinder 1
Small, interior cylinder piston 12 moves upwards, until interior 12 upper surface of cylinder piston and 29 following table face contact of needle stand.Damping oil is outside being back to
The speed of cylinder 1 reduces much compared with speed when flowing into inner cylinder 11, therefore the rebound velocity of buffer unit also receives limit
System.In the relative movement repeatedly of the opposite outer cylinder 1 of above-mentioned inner cylinder 11, generated in minute vehicle dropping process by undercarriage
Damping needle through-hole of the temporary impact energy among damping oil flows through damping needle 14 during dissipated, subtract to realize
The effect of shake.
Oil gas damping type undercarriage buffer unit structure provided by the present invention is simple, is keeping the same of good function
When, it is improved at inner cylinder end cap 13, damping needle 14 and damping needle nut 15, simplifies the overall structure of buffer unit, solve
The certainly difficult points such as existing structure complexity, processing difficulties can be suitable for the unmanned vehicle of miniature (100kg rank), fill up
Blank under the rank in terms of unmanned vehicle oil-gas type damping undercarriage；While guaranteeing damping effect, filling respectively
Oilhole 21 and oil outlet 20, outer cylinder end cap 6, interior cylinder piston 12, selected at gas-charging connection 19 O-ring seal of suitable size into
Row sealing, realizes Oil-gas Separation interfacial seal and oil seal and hermetic seal, has reached preferable sealing effect.Additionally by
Control be filled with high pressure gas pressure size and fill oil mass number, and then control undercarriage buffer unit stroke and specified load
Lotus, so that the aircraft of the buffer unit flexible adaptation difference take-off weight, increases its adaptability.
Claims (7)
1. a kind of buffer unit suitable for miniature unmanned vehicle oil gas damping type undercarriage, which is characterized in that the oil gas
The buffer unit of damping type undercarriage includes outer barrel component and interior cartridge module, and the outer barrel component includes outer cylinder, outer cylinder pivoted arm, rudder
Rack, steering ring, fixed ring, outer cylinder end cap, steering-engine, steering link, shaft hole and metal arm；The interior cartridge module includes
Inner cylinder, interior cylinder piston, inner cylinder end cap, damping needle, damping needle nut, supporting ring, toggle C, inflation connect under supporting ring, inner cylinder on inner cylinder
Head and toggle D；
The outer cylinder is hollow ladder barrel structure, and outer cylinder top half outer diameter is less than outer cylinder lower half portion outer diameter, described outer
The closing of cylinder upper surface, outer cylinder lower surface opening, the setting of outer cylinder top half side fill oilhole, and the setting of outer cylinder upper surface is fuel-displaced
Hole；Outer cylinder top half is fixed with metal arm, and there are two shaft holes for tool on the metal arm, and two shaft holes are about outer cylinder center
Symmetrically, two shaft holes are coaxial；The outer end face of one of shaft hole is machined with mortise, and the outer cylinder pivoted arm is by mortise and is somebody's turn to do
Shaft hole agrees with, and is successively socketed with steering engine frame, steering ring, fixed ring and outer cylinder end from top to bottom in the outer cylinder lower half portion
Lid；The steering engine frame is flat sheet, and the circular hole among outer cylinder lower half portion, the steering engine frame is covered by the circular hole that centre has
Internal diameter is equal to outer cylinder lower half portion outer diameter, and steering-engine is by being fixed on rudder after connecting between the screw hole on screw and steering engine frame
In rack, ring set cylinder lower half portion outside is turned to, is located at below steering engine frame, the steering ring internal diameter is equal to outside outer cylinder lower half portion
Diameter, the steering ring two sides respectively have an auricle respectively, and respectively auricle A and auricle B, auricle A and auricle B are of different sizes,
Auricle A has horizontal direction auricle through-hole F, and auricle B is with vertical direction auricle through-hole G, auricle through-hole F and auricle through-hole G
Through-hole direction is different, and the auricle A of side is connected by corresponding auricle through-hole F with the upper end of the toggle D in interior cartridge module, separately
The auricle B of side is connected by corresponding auricle through-hole G with one end of steering link, the other end and steering-engine of steering link
It is connected, the fixed ring and outer cylinder end cap covered on the outside of outer cylinder lower half portion is followed successively by below steering ring, fixed ring internal diameter is equal to outer
Cylinder lower half portion outer diameter, passes through top wire hole by jackscrew and is fixed on outer cylinder；Outer cylinder end cap has internal screw thread, and outer cylinder end cap passes through
The internal screw thread matches threaded connection with the external screw thread of outer cylinder lower half portion；
Inner cylinder is hollow ladder barrel structure, and inner cylinder top half outer diameter is less than inner cylinder lower half portion outer diameter, the inner cylinder upper half
Exceptionally diameter and inner cylinder lower half portion outer diameter are respectively less than outer cylinder internal diameter, and interior cylinder piston is located inside inner cylinder and realizes sliding inside inner cylinder
Dynamic, inner cylinder top half is located in outer cylinder, and supporting ring and supporting ring under inner cylinder are annular shape on inner cylinder, is respectively fitted over the inner cylinder upper half
Exceptionally side, supporting ring is located under inner cylinder above supporting ring on inner cylinder, on inner cylinder under supporting ring and inner cylinder supporting ring along the sum of inner cylinder axial length
Equal to inner cylinder top half, supporting ring outer diameter is equal to outer cylinder internal diameter in the length of inner cylinder axial direction, inner cylinder, supporting ring internal diameter etc. on inner cylinder
Supporting ring internal diameter is equal to inner cylinder top half outer diameter under inner cylinder top half outer diameter, inner cylinder, and supporting ring outer diameter is equal to outer cylinder under inner cylinder
Internal diameter；Supporting ring lateral wall is provided with more than one diversion trench along axial direction on inner cylinder, and inner cylinder end cap is by being threaded onto inner cylinder upper end；Position
Inner cylinder end cap lower half portion diameter inside inner cylinder is equal to inner cylinder internal diameter, and the inner cylinder end cap top half at the top of inner cylinder is straight
Diameter is less than outer cylinder internal diameter and is greater than supporting ring internal diameter on inner cylinder, has an end cap large through-hole, the inner cylinder end among inner cylinder end cap
Lid surrounding is evenly distributed with more than one end cap small through hole；Damping needle includes needle stand and needle body two parts, and the diameter of needle stand is less than
The maximum value of inner cylinder internal diameter and the diameter greater than end cap small through hole position, needle body diameter are equal among the inner cylinder end cap
End cap large through-hole diameter, needle stand are located at the lower section of inner cylinder end cap, and needle body stretches out after passing through end cap large through-hole below inner cylinder end cap,
Damping needle nut is screwed on needle body, damping the distance between needle nut lower surface and needle stand upper surface are greater than the thickness of inner cylinder end cap
Degree has axial damping needle through-hole in order to which needle body moves in end cap large through-hole among damping needle, toggle C passes through lower end
It is connect with auricle through-hole H possessed by the auricle E of inner cylinder lower half portion side, the upper end of toggle C and the lower end phase of toggle D
Connection, the upper end of toggle D is connected with auricle through-hole F possessed by the auricle A for covering the steering ring side on outer cylinder；Inner cylinder bottom
There is aeration aperture, in one end Jie aeration aperture of gas-charging connection on inner cylinder lateral wall between portion and interior cylinder piston.
2. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as described in claim 1
It is, the needle stand surrounding of the damping needle axially has needle stand through-hole, when needle stand upper surface is bonded with inner cylinder end cap lower surface,
Needle stand through-hole does not penetrate through with the end cap small through hole on inner cylinder end cap.
3. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as described in claim 1
Be, damp the needle body of needle in inner cylinder end cap end cap large through-hole axial movement, when damp needle movement arrive lower limit when, damp
Needle nut is bonded with inner cylinder end cap upper surface, and the end cap small through hole and the damping needle among damping needle of inner cylinder end cap surrounding distribution lead to
Hole is in breakthrough status, and the lower limit is that damping needle moves to greatest extent axially downwards along inner cylinder end cap；When damping needle fortune
When moving upper limit, the needle stand upper surface for damping needle is bonded with inner cylinder end cap lower surface, and the end cap of inner cylinder end cap surrounding is small logical
Hole shelters from, i.e. in breakthrough status, the upper limit is damping needle along inner cylinder end for damping needle through hole only among damping needle
End cap large through-hole in lid axially upwardly moves to greatest extent, when damping needle is in upper limit, damps needle nut lower surface
Existing distance is the distance that damps the needle body of needle and can move inside inner cylinder end cap between inner cylinder end cap upper surface.
4. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as described in claim 1
It is, the interior cylinder piston is located in inner cylinder, before buffer unit work, the needle stand following table of inner cylinder piston upper surface and damping needle
Face paste is closed.
5. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as claimed in claim 4
It is, aeration aperture inner sidewall and gas-charging connection contact position have O-ring seal.
6. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as described in claim 1
It is, the inner sidewall of the oil outlet and the inner sidewall for filling oilhole all have O-ring seal.
7. being suitable for the buffer unit of miniature unmanned vehicle oil gas damping type undercarriage, feature as described in claim 1
It is, radially with annular recess among the internal screw thread, all has O in the escape of the annular recess and internal screw thread
Type circle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810989396.5A CN109229346B (en) | 2018-08-28 | 2018-08-28 | Buffer suitable for miniature unmanned vehicles oil gas shock attenuation formula undercarriage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810989396.5A CN109229346B (en) | 2018-08-28 | 2018-08-28 | Buffer suitable for miniature unmanned vehicles oil gas shock attenuation formula undercarriage |
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| CN109229346A true CN109229346A (en) | 2019-01-18 |
| CN109229346B CN109229346B (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550681A (en) * | 2020-12-18 | 2021-03-26 | 中航飞机起落架有限责任公司 | Undercarriage locking arm connection structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109229346B (en) | 2020-05-26 |
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