CN106275392B - A kind of multistage pressurized strut locking device - Google Patents
A kind of multistage pressurized strut locking device Download PDFInfo
- Publication number
- CN106275392B CN106275392B CN201610809539.0A CN201610809539A CN106275392B CN 106275392 B CN106275392 B CN 106275392B CN 201610809539 A CN201610809539 A CN 201610809539A CN 106275392 B CN106275392 B CN 106275392B
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- wall
- sleeve
- snap ring
- cylinder
- unlock
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/26—Control or locking systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The present invention provides a kind of multistage pressurized strut locking device, including end cap, outer barrel, intermediate cylinder, inner cylinder, slides up and down sleeve, sub-supersolutions lock barrel, locks snap ring, upper and lower limited location snap ring, attachment screw, upper and lower elastic element, upper and lower steel ball up and down.The steel ball latch mechanism of high-mechanic is combined by the present invention with multistage pressurized strut, so that both to have had bearing capacity under lock-out state strong for this mechanism, reusable function is realized but also with pressurized strut expansion stroke length, on the basis of reliable locking is with unlock, suitable for Reusable Launch Vehicles landing supporting leg.This mechanism processing simultaneously is simple, easy for installation, it can be achieved that automatic deploying and retracting, service life are long.
Description
Technical field
The present invention relates to a kind of multistage pressurized strut locking device, the vehicle landing supporting leg for reuse.
Background technology
With Control System for Reusable Launch Vehicle transmitting and recycle success, Control System for Reusable Launch Vehicle landing supporting leg is answered
With being installed on additional aerodynamic drag caused by the landing supporting leg on vehicle surface to reduce, usual landing supporting leg needs to shrink
To in shell, when vehicle will land, driving form is pressed to open landing supporting leg by gas/liquid.Simultaneously as vehicle
Will produce larger shock loading to landing supporting leg in landing mission, thus in order to ensure landing supporting leg under load effect energy
Enough secure support vehicles, prevent vehicle from overturning, it is necessary to it is reliably locked by locking device after landing supporting leg is fully extended,
After the completion of vehicle lands and recycles, it can be packed up by the unlock that gas/liquid presses driving form to complete landing supporting leg.Therefore, right
For Reusable Launch Vehicles landing supporting leg, must have that high-mechanic, highly reliable, expansion stroke is long, reusable etc.
Characteristic.
Traditional usual structure of vehicle landing supporting leg jack is complex, is mainly released by priming system initial
Lock-out state then realizes expansion with the torsionspring being located in expansion stand hinge, it can be seen that, traditional landing supporting leg
The not reproducible use of jack.And do not have usually for traditional multistage retractable actuating cylinder automatic locking and unlock
Function cannot meet the requirement of landing supporting leg high bearing capacity.For traditional retractable actuating cylinder, and do not have more
The advantage of expansion stroke length caused by grade expansion.
Invention content
In order to solve problems in the prior art, provide one kind reliably can lock and unlock the present invention, be provided simultaneously with lock
Determine high-mechanic under state, pressurized strut expansion stroke length, the multistage pressurized strut locking device of reusable gas/liquid pressure transmission.
It is provided by the invention multistage pressurized strut locking device include end cap, outer barrel, intermediate cylinder, inner cylinder, slide up and down sleeve,
Sub-supersolutions lock barrel locks snap ring, upper and lower limited location snap ring, attachment screw, upper and lower elastic element, upper and lower steel ball up and down.
The upper sliding sleeve is mounted on end cap in the barrel of outer barrel composition, and upper sliding sleeve inner wall has two layers
Rank, upper sliding sleeve inner wall top bar end form clearance fit with the upper unlock sleeve outer wall, and upper sliding sleeve inner wall is left office
Rank end forms clearance fit with the upper locking snap ring outer wall, and upper sliding sleeve lower end is provided with multiple radial distributions for placing steel
The through-hole of ball and the tapped through hole being distributed side by side, the attachment screw are radial by this tapped through hole and the intermediate cylinder upper end
Upper sliding sleeve is fixedly connected by the through-hole of arrangement with intermediate cylinder, at the inner wall top bar end of upper sliding sleeve and the upper limit
It is disposed with elastic element and upper locking snap ring between the snap ring of position.
The upper unlock sleeve is the cylinder for having step outer circle, and upper unlock sleeve lower end is provided with outer wall thread, the upper limit
Position snap ring is connected by inner thread with the lower end of upper unlock sleeve.
The lower slipping sleeve is mounted in the barrel of intermediate cylinder, and lower slipping sleeve inner wall has two layers of step, is glided
Moving sleeve inner wall top bar end and the lower unlock sleeve outer wall form clearance fit, lower slipping sleeve inner wall get out of a predicament or an embarrassing situation end with
The lower locking snap ring outer wall forms clearance fit, and lower slipping sleeve inner wall lower end is disposed with internal thread, and inner cylinder passes through outer wall
Screw thread is connected to a fixed with lower slipping sleeve internal thread, and lower slipping sleeve lower part is provided with multiple radial distributions for placing lower steel ball
Through-hole.
The lower unlock sleeve is cylinder of the section in "Ji" type, and the lower limit snap ring is threaded in down
Unlock sleeve outer wall at, be disposed between the top bar end and lower limit snap ring of lower slipping sleeve lower elastic element and
Lower locking snap ring.
It is disposed with dynamic sealing washer between the upper sliding sleeve outer wall lower end and the barrel of end cap and outer barrel composition, on
Static seal washer is disposed between sliding sleeve inner wall lower end and intermediate drum outer wall, the big step end of outer wall of lower unlock sleeve is in
Between cylinder inner wall between be disposed with dynamic sealing washer, be disposed with dynamic sealing washer between outer tube inner wall lower end and intermediate drum outer wall,
Dynamic sealing washer is disposed between intermediate cylinder inner wall lower end and inner tank theca.
It is provided with multiple radial directions at the inner wall top bar of the lower slipping sleeve and in upper locking snap ring, lower locking snap ring
The through-hole of distribution, there are four symmetrical through-holes with inner cylinder upper end arrangement for intermediate cylinder, open up the purpose side of being of these through-holes
Just gas liquid circulates.
It is equipped with upper guidance tape at the upper sliding sleeve outer wall, is equipped with lower guidance tape at lower slipping sleeve outer wall, is oriented to
Band provides radial support for sliding sleeve.
The elastic element up and down uses cylindrical spring or butterfly spring.
Advantageous effect of the present invention is：The steel ball latch mechanism of high-mechanic is combined with multistage pressurized strut so that this mechanism
Both had under lock-out state that bearing capacity is strong, it is long but also with pressurized strut expansion stroke, real on the basis of reliable locking is with unlock
Existing reusable function, is suitable for Reusable Launch Vehicles landing supporting leg.This mechanism processing simultaneously is simple, easy for installation,
Automatic deploying and retracting can be achieved, service life is long.
Description of the drawings
Fig. 1 is the structure composition schematic diagram of this multistage pressurized strut locking device.
Fig. 2 is the inner cylinder deployed configuration schematic diagram of this multistage pressurized strut locking device.
Fig. 3 is the full deployed configuration schematic diagram of this multistage pressurized strut locking device.
Fig. 4 is the upper sliding sleeve structural schematic diagram of this multistage pressurized strut locking device.
Fig. 5 is the lower slipping sleeve structural schematic diagram of this multistage pressurized strut locking device.
Fig. 6 is the intermediate cylinder structural schematic diagram of this multistage pressurized strut locking device.
Fig. 7 is the inner tube structure schematic diagram of this multistage pressurized strut locking device.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
The present invention provides a kind of multistage pressurized strut locking device, the device overall structure is as shown in Figure 1, inner cylinder expansion knot
Structure as shown in Fig. 2, full deployed configuration as shown in figure 3, including end cap 1, outer barrel 17, intermediate cylinder 18, inner cylinder 19, upper sliding sleeve 5,
Lower slipping sleeve 11, upper unlock sleeve 2, lower unlock sleeve 13, upper locking snap ring 6, lower locking snap ring 14, upper limit snap ring 7, under
Limited location snap ring 16, attachment screw 9, upper elastic element 3, lower elastic element 12, upper steel ball 8, lower steel ball 15.
Upper sliding sleeve 5 is as shown in figure 4, be mounted in the barrel that end cap 1 is formed with outer barrel 17, upper sliding sleeve 5 and cylinder
Be disposed between wall radial support effect guidance tape 4 and dynamic sealing washer, 5 inner wall of upper sliding sleeve respectively with upper unlock
The outer wall of the outer wall of sleeve 2 and upper locking snap ring 6 forms clearance fit so that above unlocking sleeve 2 can be with axis with upper locking snap ring 6
To free movement, realize the locking of steel ball latch mechanism and unlock under the action of elastic element 3,5 inner wall lower end of upper sliding sleeve with
It is disposed with static seal washer between 18 outer wall of intermediate cylinder.Tapped through hole that attachment screw 9 is arranged by 5 lower end of upper sliding sleeve and
Upper sliding sleeve 5 is fixedly connected by the through-hole of 18 upper end of intermediate cylinder arrangement with intermediate cylinder 18, upper unlock sleeve 2 and upper limit snap ring
7 are fixed to each other by screw thread.
Lower slipping sleeve 11 is as shown in figure 5, be mounted in the barrel of intermediate cylinder 18, in lower slipping sleeve 11 and intermediate cylinder 18
Be disposed between wall radial support effect guidance tape 10,11 inner wall of lower slipping sleeve respectively with it is lower unlock sleeve 13 outer wall
And the outer wall of lower locking snap ring 14 forms clearance fit so that lower unlock sleeve 13 axially free can be transported with lower locking snap ring 14
It is dynamic, the locking of steel ball latch mechanism and unlock are realized under the action of elastic element 12, are opened up at 11 inner wall top bar of lower slipping sleeve
Have radially-arranged through-hole, convenient for gas liquid free flow when multistage pressurized strut folding and unfolding, lower slipping sleeve 11 by screw thread with it is interior
Cylinder 19 is fixedly connected, and dynamic sealing washer, lower unlock sleeve 13 and lower limit are disposed between lower unlock sleeve 13 and intermediate cylinder 18
Snap ring 16 is mutually permanently connected by screw thread, between 18 outer wall of 17 lower end of outer barrel and intermediate cylinder and 18 lower end of intermediate cylinder and inner cylinder
Dynamic sealing washer is disposed between 19 outer walls.
Upper locking snap ring 6, lower locking snap ring 14 offer radially-arranged through-hole, and gas liquid is facilitated to circulate, this be in order to
Ensure that the pressure that snap ring both sides are locked in locking or releasing process keeps identical, to avoid locking snap ring pressure at both sides poor
Caused locking mechanism failure.
As shown in attached drawing 6 and attached drawing 7, intermediate cylinder 18 and 19 upper end of inner cylinder open up that there are four symmetrical through-holes, this is
Due to when multistage pressurized strut carries out folding and unfolding, facilitating gas liquid that can enter outer barrel 17 and intermediate cylinder 18, intermediate cylinder by venthole
In annular chamber between 18 and inner cylinder 19, and then achieve the purpose that folding and unfolding intermediate cylinder 18 and inner cylinder 19.
The operation principle of the mechanism is to start gas/liquid when landing supporting leg needs expansion and press system, filled by 1 upper end of end cap
Enter gas liquid, pushes lower unlock sleeve 13 to move, lower unlock sleeve 13 drives lower slipping sleeve 11 to be started shipment with inner cylinder 19 in turn
It is dynamic, until when the steel ball 15 in lower slipping sleeve 11 moves to the groove of 18 lower end of intermediate cylinder, in elastic element 12 and lower lock
Determine to enter groove under the promotion of snap ring 14, complete locking, lower locking snap ring 14 is moved at lower limit snap ring 16 and terminated, such as Fig. 2
It is shown.Inner cylinder 19 is fixed to each other with intermediate cylinder 18 at this time, forms an entirety, to which one acts as expansion movement, until upper sliding
When steel ball 8 in sleeve 5 moves to the groove of 17 lower end of outer barrel, enter under the promotion of elastic element 3 and upper locking snap ring 6
Groove completes locking, and then upper locking snap ring 6, which moves at upper limit snap ring 7, terminates, and multistage pressurized strut locking device reaches at this time
To full elongation lock-out state, as shown in Figure 3.
When landing supporting leg needs to shrink, gas liquid is filled with by inner cylinder lower end, pushes lower unlock sleeve 13 to move, simultaneously
Lower locking snap ring 14 is driven to move by lower limit snap ring 16, compression elastic element 12, so that steel ball 15 is from intermediate cylinder 18
Groove in fall off, complete unlock, hereafter lower unlock sleeve 13 drives lower slipping sleeve 11 and inner cylinder 19 to act as contractile motion,
Until lower unlock sleeve 13 touches unlock sleeve 2, and unlock sleeve 2 and upper locking snap ring 6 is driven to move together so that
Steel ball 8 falls off from the groove of outer barrel 17, and multistage pressurized strut locking device unlocks completely at this time, continues to be driven in gas/liquid pressure
Full contraction state is finally moved under effect.
There are many concrete application approach of the present invention, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, it can also make several improvements, this
A little improve also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of multistage pressurized strut locking device, it is characterised in that：Including end cap（1）, outer barrel（17）, intermediate cylinder（18）, inner cylinder
（19）, slide up and down sleeve（5、11）, sub-supersolutions lock barrel（2、13）, lock snap ring up and down（6、14）, upper and lower limited location snap ring（7、
16）, attachment screw（9）, upper and lower elastic element（3、12）, upper and lower steel ball（8、15）；
The upper sliding sleeve（5）Mounted on end cap（1）With outer barrel（17）In the barrel of composition, upper sliding sleeve（5）Inner wall
With two layers of step, upper sliding sleeve（5）Inner wall top bar end and the upper unlock sleeve（2）Outer wall forms clearance fit, on
Sliding sleeve（5）Inner wall, which is got out of a predicament or an embarrassing situation, to be held and the upper locking snap ring（6）Outer wall forms clearance fit, upper sliding sleeve（5）Lower end
Multiple radial distributions are provided with for placing steel ball（8）Through-hole and the tapped through hole that is distributed side by side, the attachment screw（9）
Pass through this tapped through hole and the intermediate cylinder（18）The through-hole of upper end radial arrangement is by upper sliding sleeve（5）With intermediate cylinder（18）Gu
Fixed connection, in upper sliding sleeve（5）Inner wall top bar end and the upper limit snap ring（7）Between be disposed with elasticity
Element（3）With upper locking snap ring（6）；
The upper unlock sleeve（2）It is the cylinder with step outer circle, upper unlock sleeve（2）Lower end is provided with outer wall thread, on
Limited location snap ring（7）Pass through inner thread and upper unlock sleeve（2）Lower end be connected；
The lower slipping sleeve（11）Mounted on intermediate cylinder（18）Barrel in, lower slipping sleeve（11）Inner wall has two layers
Rank, lower slipping sleeve（11）Inner wall top bar end and the lower unlock sleeve（13）Outer wall forms clearance fit, lower slider set
Cylinder（11）Inner wall, which is got out of a predicament or an embarrassing situation, to be held and the lower locking snap ring（14）Outer wall forms clearance fit, lower slipping sleeve（11）Under inner wall
End is disposed with internal thread, inner cylinder（19）Pass through outer wall thread and lower slipping sleeve（11）Internal thread is connected to a fixed, lower slider set
Cylinder（11）Lower part is provided with multiple radial distributions for placing lower steel ball（15）Through-hole；
The lower unlock sleeve（13）It is cylinder of the section in "Ji" type, the lower limit snap ring（16）It is threadedly coupled
In lower unlock sleeve（13）Outer wall at, in lower slipping sleeve（11）Top bar end and lower limit snap ring（16）Between set successively
It is equipped with lower elastic element（12）With lower locking snap ring（14）.
2. multistage pressurized strut locking device according to claim 1, it is characterised in that：The upper sliding sleeve（5）Outside
Wall lower end and end cap（1）And outer barrel（17）Dynamic sealing washer, upper sliding sleeve are disposed between the barrel of composition（5）Inner wall lower end
With intermediate cylinder（18）Static seal washer, lower unlock sleeve are disposed between outer wall（13）The big step end of outer wall and intermediate cylinder（18）
Inner wall between be disposed with dynamic sealing washer, outer barrel（17）Inner wall lower end and intermediate cylinder（18）Dynamic sealing pad is disposed between outer wall
Circle, intermediate cylinder（18）Inner wall lower end and inner cylinder（19）Dynamic sealing washer is disposed between outer wall.
3. multistage pressurized strut locking device according to claim 1, it is characterised in that：The lower slipping sleeve（11）'s
At inner wall top bar and upper locking snap ring（6）, lower locking snap ring（14）In be provided with multiple radially-arranged through-holes, intermediate cylinder
（18）With inner cylinder（19）There are four symmetrical through-holes for upper end arrangement.
4. multistage pressurized strut locking device according to claim 1, it is characterised in that：The upper sliding sleeve（5）Outside
Upper guidance tape is equipped at wall（4）, lower slipping sleeve（11）Lower guidance tape is equipped at outer wall（10）, guidance tape provides for sliding sleeve
Radial support.
5. multistage pressurized strut locking device according to claim 1, it is characterised in that：The elastic element up and down（3、
12）Using cylindrical spring or butterfly spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809539.0A CN106275392B (en) | 2016-09-08 | 2016-09-08 | A kind of multistage pressurized strut locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809539.0A CN106275392B (en) | 2016-09-08 | 2016-09-08 | A kind of multistage pressurized strut locking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106275392A CN106275392A (en) | 2017-01-04 |
| CN106275392B true CN106275392B (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610809539.0A Active CN106275392B (en) | 2016-09-08 | 2016-09-08 | A kind of multistage pressurized strut locking device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704433B (en) * | 2017-01-12 | 2019-05-14 | 南京航空航天大学 | A kind of bidirectional buffer with driving function |
| CN108032997B (en) * | 2017-10-31 | 2022-09-09 | 中航通飞研究院有限公司 | Lock mechanism |
| CN110871911B (en) * | 2019-12-03 | 2022-05-24 | 哈尔滨工业大学 | Follow-up locking mechanism applied to landing support mechanism of reusable carrier |
| CN112483509A (en) * | 2020-12-12 | 2021-03-12 | 江西洪都航空工业集团有限责任公司 | Aircraft cabin door actuator cylinder with internal locking mechanism |
| CN112815057B (en) * | 2021-02-03 | 2024-03-01 | 四川凌峰航空液压机械有限公司 | Redundancy locking backup mechanical lock electromechanical actuator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB458005A (en) * | 1935-03-28 | 1936-12-10 | Elektronmetall Gmbh | Improvements in and relating to adjustable struts for air-craft |
| CN201149071Y (en) * | 2007-08-25 | 2008-11-12 | 陕西燎原航空机械制造公司 | Locking apparatus of dynamoelectric deploying and retracting actuating cylinder |
| CN201582248U (en) * | 2009-11-26 | 2010-09-15 | 中国航空工业集团公司沈阳发动机设计研究所 | Mechanical self-locking actuating cylinder structure |
| US8727273B2 (en) * | 2010-09-08 | 2014-05-20 | Goodrich Corporation | Shrink shock strut locking mechanism for retractable aircraft landing gear |
| CN102162509B (en) * | 2011-03-25 | 2013-06-05 | 成都飞机工业（集团）有限责任公司 | Locking device of electric actuating cylinder |
| CN102198866B (en) * | 2011-04-22 | 2013-10-02 | 南京航空航天大学 | Telescopic landing leg expanding mechanism for planetary probe |
| CN103935525B (en) * | 2014-04-24 | 2016-01-20 | 南京航空航天大学 | The buffering landing leg of Control System for Reusable Launch Vehicle and way to play for time thereof |
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2016
- 2016-09-08 CN CN201610809539.0A patent/CN106275392B/en active Active
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| Publication number | Publication date |
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| CN106275392A (en) | 2017-01-04 |
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