CN101858371B - Actuator cylinder with in-built manual-operated emergent unlocking device - Google Patents
Actuator cylinder with in-built manual-operated emergent unlocking device Download PDFInfo
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- CN101858371B CN101858371B CN 201010181974 CN201010181974A CN101858371B CN 101858371 B CN101858371 B CN 101858371B CN 201010181974 CN201010181974 CN 201010181974 CN 201010181974 A CN201010181974 A CN 201010181974A CN 101858371 B CN101858371 B CN 101858371B
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Abstract
The invention relates to an actuator cylinder with a in-built manual-operated emergent unlocking device, which comprises a cylinder, an end cover, a piston and a mechanical lock device, wherein, the piston is positioned in the cylinder and the mechanical lock device is positioned in the piston. The actuator cylinder is characterized in that one end of the end cover is provided with the manual-operated emergent unlocking device which is matched with the mechanical lock device; the manual-operated emergent unlocking device comprises an emergent piston, a restoring spring and an interlocking piece, wherein, the restoring spring is positioned between the emergent piston and an elastic clamping craw; the interlocking piece is composed of a driving lever, an unlocking spindle and a rocker arm; the driving lever is connected with the emergent piston in the end cover, and the stirring direction of the moving end of the driving lever be consistent with the axial direction of the emergent piston; and two ends of the restoring spring are respectively pressed at a shaft shoulder end face of the emergent piston and the shaft shoulder of the elastic clamping craw which are positioned at two ends of the emergent piston. The actuator cylinder simplifies the hydraulic control system and the structure of the actuator cylinder, reduces the weight and the occupied space for holding and releasing or opening and closing a mechanism, and can be easily assembled and disassembled, conveniently maintained and reused, thus reducing the manufacturing and use cost, and improving the safety of holding and releasing or opening and closing the mechanism.
Description
Technical field
The present invention relates to the inner locking type hydraulic actuator, be specifically related to inner locking type hydraulic actuator manual-operated emergent unlocking device.
Background technique
Used hydraulic actuator mostly is the pressurized strut of built-in mechanical lock in the folding and unfolding of aircraft, boats and ships, warship, battlebus and other machinery or the switching mechanism, when piston (or piston rod) when moving to limit position, the mechanical lock device that is built in the pressurized strut firmly fixes piston (or piston rod), makes its akinesia.This class pressurized strut in use has and automatically locks the passive advantage of unblanking of hydraulic pressure.For guaranteeing that pressurized strut also can normally be unblanked under the special emergency situation, the method that adopts is two cover hydraulic control systems to pressurized strut to be set at present, wherein a cover is the normal hydraulic control system of using, and another set of be standby system, also standby one overlaps hand hydraulic pumping unit simultaneously.Make that like this hydraulic control system is loaded down with trivial details in folding and unfolding or the switching mechanism, handle complicatedly that the hand hydraulic pumping unit of hand control is inefficiency not only, and need take than large space, whole hydraulic control system weight is difficult to alleviate, the manufacturing cost and use cost height.If in a single day the oil pipe that is connected in the pressurized strut occurs breaking or the explosion phenomenon, the mechanical lock in the pressurized strut can't be opened at all so, and the pressurized strut akinesia makes the folding and unfolding of equipment or switching mechanism not to work, and this will produce serious catastrophic failure.
Along with the development of modern technologies, simple to folding and unfolding or switching mechanism proposition control system, easy operation, compactness simple for structure, multiple functional, reliable in quality, stable performance, long lifetime, in light weight, be easy to safeguard that manufacturing cost and use cost is low, under emergency condition, can safety, promptly put down or requirement such as opening mechanism.Therefore traditional inner locking type hydraulic actuator and hydraulic control system thereof, particularly its emergent unlocking method or form can not adapt to the especially development of present generation aircraft, warship technology of modern technologies gradually.
Summary of the invention
The present invention has carried out innovation to emergent unlocking mode and the structure of mechanical lock device in traditional inner locking type hydraulic actuator, purpose is to simplify conventional airplane, the method of the folding and unfolding in the equipment such as warship or switching mechanism emergency extension or unlatching or form, a kind of pressurized strut of built-in manual-operated emergent unlocking device is provided, not only changed the traditional emergent unlocking mode of pressurized strut, hydraulic control system and the structure of pressurized strut have been simplified, and in a single day the oil pipe that occurs in the pressurized strut breaks or the explosion phenomenon, can avoid to open the catastrophic failure that causes equipment serious because of the mechanical lock in the pressurized strut at all, improve the Security of folding and unfolding or switching mechanism.
For achieving the above object, the basic technical scheme taked of the present invention is:
A kind of pressurized strut of built-in manual-operated emergent unlocking device, comprise cylinder barrel, end cap, be positioned at the piston of cylinder barrel inside and the mechanical lock device of piston, described mechanical lock device comprises lock Returnning spring, cup shell, support bushing, fixed cover, floating piston, latching ram, locking bar and elastic card claw; The present invention is characterised in that, be provided with the manual-operated emergent unlocking device that matches with described mechanical lock device at described end cap one end, described manual-operated emergent unlocking device comprises emergency piston in the end cap, the Returnning spring between emergency piston and elastic card claw and the coupling component that is made of driving lever, unblank rotating shaft and rocking arm; The driving lever of described coupling component by wherein is connected with described emergency piston, and the driving lever movable end to stir direction consistent with the axial direction of emergency piston; Be provided with the locking bar in the mechanical lock device in the described emergency piston; Shaft shoulder end face and the elastic card claw shaft shoulder of the emergency piston that is positioned at its two ends pressed at the two ends of described Returnning spring respectively.
As embodiment, described end cap bottom is provided with three orthogonal mounting holes, and it comprises end-cover axle to the emergency piston mounting hole that arranges and is arranged at two mounting holes in addition that make progress in emergency piston mounting hole week; Wherein a mounting hole is oil hole, and driving lever cooperates in the cylindrical hole that is installed on the setting of emergency piston shaft shoulder right-hand member by this oil hole; The described rotating shaft of unblanking be installed on make progress in end cap week with perpendicular another mounting hole of oil hole, and cooperate the axis hole that penetrates the driving lever end.
As specific embodiments, the concrete structure of the coupling component that is made of driving lever, unblank rotating shaft and rocking arm is: the rotating shaft of unblanking cooperates the axis hole that penetrates the driving lever end, the screw that is provided with multidiameter shaft pack into shift lever axis to tapped hole, multidiameter shaft cooperates the axis hole that penetrates the rotating shaft of unblanking, and driving lever and the rotating shaft of unblanking are connected into a coupling component; Rocking arm is provided with a through hole, and the rotating shaft of unblanking cooperates this through hole of packing into, and by pin rocking arm and the rotating shaft of unblanking is fixed into coupling component; Driving lever, the rotating shaft of unblanking, rocking arm three form a coupling component.
As preferred version, in order to prevent that the accidental collision of operator from causing unblanking, said apparatus is provided with the emergent unlocking idle stroke, namely is provided with the gap between emergency piston and locking bar, and this gap width is less than the shaft shoulder end face of emergency piston and the gap width between the elastic card claw shaft shoulder.
Based on above-mentioned basic structure, as specific embodiments, described emergency piston is provided with d-axis and the shaft shoulder that matches with emergency piston mounting hole in the end cap, is provided with the straight circular hole that matches with the sphere of driving lever bottom at d-axis.
When rotating for fear of driving lever, its movable end and emergency piston are interfered clamping stagnation, and described emergency piston is provided with the straight trough that connects mutually with straight circular hole.
In order to prevent that emergency piston from rotating along its axis, described emergency piston is provided with long groove, and this long groove matches with the multidiameter shaft of screw.
In order to prevent dust and to prevent that end cap leakage of oil, the described rotating shaft of unblanking are provided with for the circular groove that dust ring is installed with in order to adorn the circular groove of seal ring.
As specific embodiments, the concrete structure of described mechanical lock device is: between the lock Returnning spring of described locking bar in emergency piston and cup shell; Described support bushing and fixed cover press mutually and all are fixed in the piston, and described fixed cover presses an end mutually with support bushing and forms annular chamber as the locked groove that matches with the elastic card claw dead bolt of elastic card claw; Lock Returnning spring in the described piston presses locking bar, and locking bar presses floating piston; The described floating piston the other end presses fixed cover, and latching ram is fixedly arranged on the locking bar, and the external diameter of this latching ram cooperates with the endoporus of elastic card claw and floating piston.
The working principle of the manual-operated emergent unlocking device of the built-in mechanical lock of pressurized strut of the present invention is as described below:
Normal hydraulic pressure is unblanked: when hydraulic system supplies hydraulic oil to the pressurized strut rodless cavity, hydraulic oil promotes floating piston left, the floating piston left end is pushed locking bar and is moved to the left and pushes the Returnning spring that is arranged on the latch mechanism in the cup shell together, and latching ram is fixed on the locking bar along with locking bar is mobile together; Under the effect of hydraulic coupling and external load, the pressurized strut piston drives support bushing and fixed cover has the trend that is moved to the left together, when latching ram is covered the stroke X that unblanks and is withdrawed from the elastic card claw endoporus, the inclined-plane of support bushing left end will push the elastic card claw dead bolt, make elastic card claw produce the endoporus that resiliently deformable withdraws from the locked groove that is formed by support bushing and fixed cover and enters support bushing, piston is moved to the left no longer and is obstructed, i.e. pressurized strut is finished and unblanked.In this process, the latch mechanism in the pressurized strut and manual-operated emergent unlocking device are each other without any role and influence.
Meet an urgent need and manually unblank: when the hydraulic control system of pressurized strut broke down, the operator can rotate by promoting rocking arm.Rocking arm drives unblank rotating shaft, screw and driving lever interlock body and rotates clockwise around the rotating shaft of unblanking.The sphere of driving lever lower end promotes emergency piston and is moved to the left, the emergency piston compression reseting spring, after emergency piston is covered idle stroke δ and the locking bar left end is contacted, then continue to squeeze left and push away locking bar, latching ram is fixed on the locking bar, therefore latching ram is moved to the left with locking bar, the lock Returnning spring of the latch mechanism of locking bar left end extruding meanwhile.When latching ram is covered the stroke X that unblanks and is withdrawed from the elastic card claw endoporus, the inclined-plane of support bushing left end will push the elastic card claw dead bolt, make elastic card claw produce the endoporus that resiliently deformable withdraws from the locked groove that is formed by support bushing and fixed cover and enters support bushing, piston is moved to the left no longer and is obstructed, i.e. pressurized strut is finished and unblanked.After the shaft shoulder of emergency piston touched the right side of elastic card claw, namely covers maximum emergent unlocking stroke L, emergency piston then stopped mobile, thereby prevented that Returnning spring from being pressed doubling-up, protection emergent unlocking mechanism.After unblanking, the operator unclamps rocking arm, and emergency piston returns to original position under the effect of Returnning spring, makes driving lever, unblank rotating shaft and rocking arm interlock body return to the original position state.
The present invention is on the basis that keeps inner locking type hydraulic actuator fundamental function and structure, carried out innovation, only the structure of pressurized strut end cap has been done less change, adopt integrated designing technique to design a kind of pressurized strut of built-in manual-operated emergent unlocking device, thereby simplified hydraulic control system and the structure of pressurized strut, the weight that has reduced folding and unfolding or switching mechanism takes up space with institute, has reduced manufacturing cost and use cost, improved the Security of folding and unfolding or switching mechanism, reusable.
Description of drawings
Fig. 1 is embodiment's structure and rigging position schematic representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation of emergency piston 10 among Fig. 1.
Fig. 4 is the plan view of Fig. 3.
Fig. 5 is the structural representation of driving lever 11 among Fig. 1.
Fig. 6 is the structural representation of unblanking rotating shaft 14 among Fig. 2.
Fig. 7 is the structural representation of screw 13 among Fig. 2.
Fig. 8 is the structural representation of rocking arm 15 among Fig. 2.
Fig. 9 is the schematic representation of pressurized strut emergent unlocking among Fig. 1.
Among the figure: 1. lock Returnning spring, 2. cup shell, 3. piston, 4. floating piston, 5. latching ram, 6. support bushing, 7. locking bar, 8. elastic card claw, 9. Returnning spring, 10. emergency piston, 11. driving lever, 12. end caps, 13. screws, the rotating shaft 14. unblank, 15. rocking arms, 16. shaft shoulders, 17. straight circular hole, 18. long grooves, 19. d-axis, 20. straight trough, the tapped hole of 21. driving levers, the axis hole on the 22. driving lever upper end portion cylinders, 23. sphere, 24. axis holes of unblanking rotating shaft, the 25. rocking arm installation shaft of unblanking rotating shaft, 26. thread spindle, 27. multidiameter shafts, 28. rocking arm mounting holes, 29. the elastic card claw dead bolt, the 30. elastic card claw shaft shoulders, 31. elastic card claw right sides, 32. fixed cover, 33. cylinder barrels, 34. locked grooves, X. the stroke of unblanking, δ. emergent unlocking idle stroke, the maximum emergent unlocking stroke of L..
Embodiment
The present invention is further described below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, the pressurized strut of the described built-in manual-operated emergent unlocking device of present embodiment, comprise cylinder barrel 33, end cap 12, be positioned at the piston 3 of cylinder barrel inside and the mechanical lock device of piston 3, described mechanical lock device comprises lock Returnning spring 1, cup shell 2, support bushing 6, fixed cover 32, floating piston 4, latching ram 5, locking bar 7 and elastic card claw 8.Wherein between the lock Returnning spring 1 of locking bar 7 in emergency piston 10 and cup shell 2; Described support bushing 6 and fixed cover 32 press mutually and all are fixed in the piston 3, and described fixed cover 32 presses an end mutually with support bushing 6 and forms annular chamber as the locked groove that matches with the elastic card claw dead bolt 29 of elastic card claw 8; Lock Returnning spring 1 in the described piston 3 presses locking bar 7 round platform left sides, the left side that described locking bar 7 passes floating piston 4 endoporus and presses floating piston 4; Described floating piston 4 the other ends press fixed cover 32, and latching ram 5 is fixedly arranged on the locking bar 7, and the cylindrical of this latching ram 5 cooperates with the endoporus of elastic card claw 8 and floating piston 4.
As shown in Figure 3, Figure 4, emergency piston 10 is provided with the shaft shoulder 16, d-axis 19, and long groove 18 is provided with straight circular hole 17 at d-axis 19, is provided with the straight trough 20 that connects with straight circular hole 17 simultaneously.As shown in Figure 1 and Figure 2, d-axis 19 cooperations of emergency piston 10 are installed in the axial circular hole of end cap 12, Returnning spring 9 is installed between elastic card claw 8 and the emergency piston 10, in driving lever 11 is packed the straight circular hole 17 of emergency piston 10 into along the end cap oil hole, the sphere 23 of its underpart cooperates with straight circular hole 17, and another mounting hole that unblank 14 whiles of rotating shaft and end cap 12 are circumferential and the axis hole 22 on the cylinder of driving lever upper end portion cooperate.As shown in Figure 6, the rotating shaft 14 of unblanking is provided with two circular grooves, and a groove prevents that in order to adorn dust ring impurity from entering pressurized strut, and a groove prevents the end cap leakage of oil in order to adorn seal ring, and the rotating shaft of unblanking is provided with axis hole 24.As shown in Figure 5, driving lever is provided with tapped hole 21.As shown in Figure 7, screw 13 is provided with a thread spindle 26 and multidiameter shaft 27, and screw 13 cooperates the hole 22 and the axis hole 24 of unblanking rotating shaft of the driving lever of packing into simultaneously, makes driving lever 11 and the rotating shaft 14 of unblanking become an interlock body.As shown in Figure 8, rocking arm 15 is provided with a through hole, and namely the rocking arm mounting hole 28, in order to the cooperation rotating shaft d-axis of unblanking of packing into, namely on the rocking arm installation shaft 25 of the rotating shaft of unblanking among Fig. 6.By pin rocking arm 15 and the rotating shaft 14 of unblanking are fixed into the interlock body, thereby make rocking arm 15, lock rotating shaft 14 and driving lever 11 become an interlock body.Straight trough 20 on the described emergency piston right-hand member d-axis 19, when avoiding driving lever 11 to rotate with emergency piston 10 interference clamping stagnations, long groove 18 is in order to become the oily passage of mistake of end cap 12 and pressurized strut rodless cavity, the little axle of the multidiameter shaft 27 in the screw 13 cooperates in the long groove 18 of the emergency piston 10 of packing into simultaneously, prevents that emergency piston 10 from rotating along its axis.
When needs were manually unblanked, the operator promoted rocking arm 15 and rotates.Rocking arm 15 drives unblank rotating shaft 14, screw 13 and driving lever 11 interlocks, and driving lever 11 rotates clockwise around the rotating shaft of unblanking.The sphere 23 of driving lever lower end promote emergency pistons 10 to left shown in Figure 1 to movement, emergency piston 10 compression reseting springs 9, after emergency piston 10 is covered idle stroke δ and locking bar 7 left ends is contacted, then continue to squeeze left and push away locking bar 7, latching ram 5 is fixed on the locking bar 7, therefore latching ram 5 is moved to the left with locking bar 7, and meanwhile locking bar 7 left ends push the lock Returnning spring 1 in the latch mechanism that is arranged in the cup shell 2.When latching ram 5 is covered the stroke X that unblanks and is withdrawed from the endoporus of elastic card claw 8, the inclined-plane of support bushing 6 left ends will push elastic card claw dead bolt 29, make elastic card claw dead bolt 29 produce resiliently deformable and withdraw from the locked groove 34 that is formed by support bushing 6 and fixed cover 32 and the endoporus that enters support bushing 6, piston 3 is moved to the left no longer and is obstructed, i.e. pressurized strut is finished and unblanked.After the emergency piston shaft shoulder 30 was covered maximum emergent unlocking stroke L and touched the right side 31 of elastic card claw, 10 of emergency pistons stopped mobile, thereby prevented that Returnning spring 9 from being pressed doubling-up, protection emergent unlocking mechanism.After unblanking, the operator unclamps rocking arm 15, and emergency piston 10 returns to original position under the effect of Returnning spring 9, makes driving lever 11, unblank rotating shaft 14 and rocking arm 15 interlock bodies return to the original position state.
Claims (10)
1. the pressurized strut of a built-in manual-operated emergent unlocking device, comprise cylinder barrel, be contained in cylinder barrel one end end cap, be positioned at the piston of cylinder barrel inside and the mechanical lock device of piston, described mechanical lock device comprises lock Returnning spring, cup shell, support bushing, fixed cover, floating piston, latching ram, locking bar and elastic card claw; Wherein be contained in lock Returnning spring in the cup shell and be pressed against an end of locking bar, described support bushing and fixed cover press mutually and all are fixed in the piston of described cylinder barrel inside, and described fixed cover presses an end mutually with support bushing and forms annular chamber as the locked groove that matches with elastic card claw; Described locking bar passes floating piston and presses an end of floating piston; The other end of described floating piston presses fixed cover, and latching ram is fixedly arranged on the locking bar, and the cylindrical of this latching ram cooperates with the endoporus of elastic card claw and floating piston; It is characterized in that, be provided with the manual-operated emergent unlocking device that matches with described mechanical lock device at described end cap one end, described manual-operated emergent unlocking device comprise emergency piston in the end cap, the Returnning spring between emergency piston and elastic card claw with by driving lever, the rotating shaft and drive the coupling component that promoted emergency piston that the rocking arm of the rotating shaft rotation of unblanking constitutes moves unblanked of fixedlying connected with driving lever; The driving lever of described coupling component by wherein is connected with described emergency piston, and the driving lever movable end to stir direction consistent with the axial direction of emergency piston; Be provided with the locking bar in the mechanical lock device in the described emergency piston; Shaft shoulder end face and the elastic card claw shaft shoulder of the emergency piston that is positioned at its two ends pressed at the two ends of described Returnning spring respectively.
2. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 1, it is characterized in that, described end cap bottom is provided with three orthogonal mounting holes, and it comprises end-cover axle to the emergency piston mounting hole that arranges and is arranged at two mounting holes in addition that make progress in emergency piston mounting hole week; Wherein a mounting hole is oil hole, and driving lever cooperates in the cylindrical hole that is installed on the setting of emergency piston shaft shoulder right-hand member by this oil hole; The described rotating shaft of unblanking be installed on make progress in end cap week with perpendicular another mounting hole of oil hole, and cooperate the axis hole that penetrates the driving lever end.
3. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 1, it is characterized in that, the concrete structure of the coupling component that is made of driving lever, unblank rotating shaft and rocking arm is: the rotating shaft of unblanking cooperates the axis hole that penetrates the driving lever end, the screw that is provided with multidiameter shaft pack into shift lever axis to tapped hole, multidiameter shaft cooperates the axis hole that penetrates the rotating shaft of unblanking, and driving lever and the rotating shaft of unblanking are connected into a coupling component; Rocking arm is provided with a through hole, and the rotating shaft of unblanking cooperates this through hole of packing into, and by pin rocking arm and the rotating shaft of unblanking is fixed into coupling component; Driving lever, the rotating shaft of unblanking, rocking arm three form a coupling component.
4. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 1, it is characterized in that, between described emergency piston and locking bar, be provided with the gap, and this gap width is less than the shaft shoulder end face of emergency piston and the gap width between the elastic card claw shaft shoulder.
5. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 3, it is characterized in that, described emergency piston is provided with d-axis and the shaft shoulder that matches with emergency piston mounting hole in the end cap, is provided with the straight circular hole that matches with the sphere of driving lever bottom at d-axis.
6. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 5, it is characterized in that described emergency piston is provided with the straight trough that connects mutually with straight circular hole.
7. according to the pressurized strut of the described built-in manual-operated emergent unlocking device of claim 5, it is characterized in that described emergency piston is provided with long groove, this long groove matches with the multidiameter shaft of screw.
8. according to the pressurized strut of one of claim 1-4,6-7 described built-in manual-operated emergent unlocking device, it is characterized in that the described rotating shaft of unblanking is provided with for the circular groove that dust ring is installed with in order to adorn the circular groove of seal ring.
9. according to the pressurized strut of one of claim 1-4,6-7 described built-in manual-operated emergent unlocking device, it is characterized in that the structure of described mechanical lock device is: between the lock Returnning spring of described locking bar in emergency piston and cup shell; Described support bushing and fixed cover press mutually and all are fixed in the piston of described cylinder barrel inside, and described fixed cover presses an end mutually with support bushing and forms annular chamber as the locked groove that matches with the elastic card claw dead bolt of elastic card claw; Lock Returnning spring in the described piston presses locking bar, and locking bar presses floating piston; The described floating piston the other end presses fixed cover, and latching ram is fixedly arranged on the locking bar, and the external diameter of this latching ram cooperates with the endoporus of elastic card claw and floating piston.
10. according to the pressurized strut of claim 2 or 4 described built-in manual-operated emergent unlocking devices, it is characterized in that, described emergency piston is provided with d-axis and the shaft shoulder that matches with emergency piston mounting hole in the end cap, is provided with the straight circular hole that matches with the sphere of driving lever bottom at d-axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010181974 CN101858371B (en) | 2010-05-25 | 2010-05-25 | Actuator cylinder with in-built manual-operated emergent unlocking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010181974 CN101858371B (en) | 2010-05-25 | 2010-05-25 | Actuator cylinder with in-built manual-operated emergent unlocking device |
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| CN101858371A CN101858371A (en) | 2010-10-13 |
| CN101858371B true CN101858371B (en) | 2013-08-21 |
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| CN 201010181974 Active CN101858371B (en) | 2010-05-25 | 2010-05-25 | Actuator cylinder with in-built manual-operated emergent unlocking device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211660B (en) * | 2011-04-29 | 2013-03-27 | 中航飞机起落架有限责任公司 | Explosion type emergency unlocking device for built-in mechanical lock of actuator cylinder |
| CN103523218B (en) * | 2013-10-12 | 2015-10-21 | 中国航天空气动力技术研究院 | A kind of unmanned plane adjustable damping front-wheel shimmy-damper |
| CN104088853B (en) * | 2014-06-25 | 2016-08-17 | 长治清华机械厂 | Hydraulic cylinder elastic card claw retractably enclosed automatic locking mechanism |
| CN104088852B (en) * | 2014-06-25 | 2016-05-04 | 长治清华机械厂 | Elastic card claw enclosed automatic locking mechanism for hydraulic cylinder |
| CN104354854B (en) * | 2014-10-29 | 2016-06-29 | 中航飞机起落架有限责任公司 | A kind of multi-functional undercarriage brace apparatus |
| CN104632780B (en) * | 2014-12-05 | 2016-08-24 | 四川凌峰航空液压机械有限公司 | Pressurized strut U-shaped slotted collar is locked |
| CN104627356B (en) * | 2015-02-12 | 2016-06-01 | 中航飞机起落架有限责任公司 | One can holding bar pressurized strut and can roll over pole structure |
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| US3834276A (en) * | 1970-09-08 | 1974-09-10 | M Gournelle | Rams |
| EP0579919A1 (en) * | 1992-06-27 | 1994-01-26 | Daimler-Benz Aerospace Aktiengesellschaft | Pneumatic linear drive with locking for ends of travel |
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| CN101858371A (en) | 2010-10-13 |
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