CN201671913U - Actuator cylinder with built-in claw lock device - Google Patents

Actuator cylinder with built-in claw lock device Download PDF

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Publication number
CN201671913U
CN201671913U CN2010202022549U CN201020202254U CN201671913U CN 201671913 U CN201671913 U CN 201671913U CN 2010202022549 U CN2010202022549 U CN 2010202022549U CN 201020202254 U CN201020202254 U CN 201020202254U CN 201671913 U CN201671913 U CN 201671913U
Authority
CN
China
Prior art keywords
piston
lock
hole
claw
floating piston
Prior art date
Application number
CN2010202022549U
Other languages
Chinese (zh)
Inventor
黄立新
邓晓山
张健全
冯广
李任复
张威
Original Assignee
中航飞机起落架有限责任公司
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Application filed by 中航飞机起落架有限责任公司 filed Critical 中航飞机起落架有限责任公司
Priority to CN2010202022549U priority Critical patent/CN201671913U/en
Application granted granted Critical
Publication of CN201671913U publication Critical patent/CN201671913U/en

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Abstract

The utility model discloses an actuator cylinder with a built-in claw lock device, which comprises a cylinder, a cylinder cover and a piston in the cylinder, wherein an elastic claw is arranged in the cylinder cover, one end of the elastic claw is a thread shaft for fixedly connecting with the cylinder cover, and the other end thereof is a claw lock bolt; a blocking lock and unlock mechanism which is matched with the elastic claw is arranged in the piston; and the blocking lock and unlock mechanism consists of the piston, a support locking ring, a return spring, a floating piston, a lock support block and a fixed sleeve. The device has simple and compact structure, is convenient to adjust the lock gap, prevents the lock device from scratching the internal wall when moving along with the piston, improves the performance and service life of the actuator cylinder, has easy dismantling and convenient maintenance, and reduces the production cost.

Description

A kind of pressurized strut of built-in claw lock device

Technical field

The utility model relates to hydraulic actuator on the aircraft, is specifically related to be built in the mechanical lock device in the hydraulic actuator piston.

Background technique

All there are important execution functional element one hydraulic actuator in aircraft extension and retraction system or the reciprocating system of need, and general hydraulic actuator inside all is provided with mechanical lock, when piston drives piston rod movement to limit position, piston or piston rod is firmly fixed.

At present on China's aircraft in the load hydraulic actuator of built-in mechanical lock, mechanical lock device in any shape (as Cylinder lock with ball, snap ring lock, hinge lock etc.), all design on piston, the general complex structure of lock device, heaviness, cause the structure of pressurized strut of built-in this kind lock device also corresponding huge, weight is bigger; Simultaneously lock device with piston motion the time with the inner wall of cylinder contact friction, easily scratch the inner wall of cylinder surface, and then damage the Sealing on the piston, influence the performance and the life-span of pressurized strut.In order to guarantee the wear resistance of inner wall of cylinder, must carry out special warfare to the inner wall of cylinder surface and handle (as nitriding etc.).Owing to the complex structure of lock device, the lock gap is difficult for adjusting and guaranteeing simultaneously, and the manufacturing of whole pressurized strut and assembly technology complexity are difficult in maintenance.

Development along with the present generation aircraft technology, load pressurized strut to built-in mechanical lock proposes compactness simple for structure, in light weight, be easy to safeguard that manufacturing cost and use cost is low, reliable in quality, stable performance, the requirement of long service life (with the same longevity of aircraft), the therefore load pressurized strut of traditional built-in mechanical lock, particularly its built-in mechanical lock device can not adapt to the requirement of present generation aircraft technical development gradually.

The model utility content

The utility model has carried out innovation to traditional structure that is built in mechanical lock device in the hydraulic actuator to be improved, and purpose is to provide a kind of suitable present generation aircraft to be built-in with the pressurized strut of claw lock device, and the lock device in the pressurized strut can be locked by automatic steady, locking is firm, and normal hydraulic pressure is unblanked, and compactness simple for structure, thereby make that also the pressurized strut structure is terse, in light weight, manufacturing process is simple, and cost is low, be easy to safeguard, reliable in quality, stable performance, long service life.

For achieving the above object, the basic technical scheme that the utility model adopts is: a kind of pressurized strut of built-in claw lock device, comprise the piston in cylinder barrel, cylinder cap and the cylinder barrel, the utility model is characterised in that, be provided with elastic card claw in the described cylinder cap, this elastic card claw one end is to be used for the thread spindle of fixedlying connected with cylinder cap, and the other end is the claw dead bolt; Be provided with the interlock lock-opening mechanism that matches with elastic card claw in the described piston; Described interlock lock-opening mechanism is made up of piston, support lock ring, Returnning spring, floating piston, lock bracer and fixed cover; Be provided with an interior threaded hole and two shoulder holes that link to each other in the described piston, interior threaded hole is used to be connected and fixed described support lock ring, big shoulder hole in the described piston is used to install described fixed cover, little shoulder hole is used to install described Returnning spring and floating piston, little shoulder hole end is provided with an exhaust port, connects with the piston rod free vent; Described support lock ring heads on fixed cover, forms a ring-like chamber between described support lock ring and the described fixed cover as the locked groove that matches with the claw dead bolt, and described floating piston one end is being pressed Returnning spring, and the other end heads on fixed cover.

As preferred embodiment, a tapped hole is arranged in the described floating piston, be used to be connected and fixed the lock bracer, make floating piston and lock bracer become the interlock body; The described floating piston little shoulder hole little circular shaft that adapts of the Returnning spring mounting hole of circular shaft and external diameter and piston greatly accordingly that is provided with external diameter and piston simultaneously, described big circular shaft is provided with the sealed groove that is used for adorning seal ring; The little circular shaft of floating piston is provided with an oblique through hole, and described oblique through hole is communicated with Returnning spring mounting hole and the enclosed cavity that is formed by little shoulder hole in floating piston and the piston; The width of described enclosed cavity, the distance of stop surface hole end surface of little shoulder hole in the piston that is floating piston is as the shift motion of floating piston, the stroke of promptly unblanking.

As preferred embodiment, described lock bracer is the ladder straight cylinder, comprises a little straight cylinder and a big straight cylinder, and described little straight cylinder is provided with one section tapped hole respective threads that is provided with floating piston inside, is used for being connected into the interlock body with floating piston; Described big straight cylinder cooperates with elastic card claw endoporus and floating piston endoporus simultaneously; Be provided with through hole with big straight cylinder end face on the described little straight cylinder.

The working principle of the pressurized strut of the built-in claw lock device that the utility model proposes is as described below:

Lock: rod chamber advances high pressure oil, pressure oil promotes piston and drives the interlock lock-opening mechanism to move right, when the support lock ring touches elastic card claw, support the long awl endoporus extruding elastic card claw of lock ring front end, make its generation resiliently deformable dwindle and enter and support the lock ring endoporus.When elastic card claw pushes up the lock bracer, make that lock bracer and floating piston can not be with piston motions, but because piston and other part of interlock lock-opening mechanism still continue to move right, therefore Returnning spring is compressed, when the support lock ring arrives limit position with piston motion, the claw dead bolt of elastic card claw also just in time is positioned at the locked groove annular chamber, elastic card claw is no longer supported the extruding of lock ring endoporus and the original state of rebounding, meanwhile, elastic card claw is roof pressure lock bracer no longer also, therefore under the effect of Returnning spring, floating piston and lock bracer move right, and the big straight cylinder of lock bracer inserts the endoporus of elastic card claw immediately, making elastic card claw that resiliently deformable can not take place dwindles, the claw dead bolt of elastic card claw has blocked the support lock ring, makes itself and the piston can not voltuntary movement, thereby finishes locking of automatic mechanical lock.When floating piston pushes up fixed cover, just stop together with the lock bracer.

Unblank: rodless cavity advances high pressure oil, piston pressure oil or outside under the effect of carrying, the trend of oriented left movement, make that supporting lock ring is pushing elastic card claw, pressure oil promotes floating piston pressed home spring by the through hole of lock bracer simultaneously, and related lock bracer is together to left movement, when floating piston is run into the end face of the little shoulder hole of piston, just stop motion, the big straight cylinder of locking bracer this moment also withdraws from the endoporus of elastic card claw fully, makes elastic card claw under the support lock ring pushes resiliently deformable take place left and dwindle that the claw dead bolt of elastic card claw progressively breaks away from locked groove, enter and support the lock ring endoporus, unblank thereby finish.

The utility model has adopted integrated designing technique, keeping on the former lock device working principle basis of invariable, the Lock device with two same action member structure innovation improves design, with the integrated design of lock device in piston, thereby simplified with compactness the structure of pressurized strut, reduce weight, reduce the technology difficulty of making and assembling, easy disassembling, be convenient to safeguard, reduce cost of production, improved the performance and the life-span of pressurized strut simultaneously, satisfied the technical requirements trend of present generation aircraft.

Description of drawings

Fig. 1 is structure and the rigging position schematic representation of the utility model when locking state;

Fig. 2 is the structural representation of elastic card claw among Fig. 1;

Fig. 3 is a structure of piston schematic representation among Fig. 1;

Fig. 4 is the structural representation of fixed cover among Fig. 1;

Fig. 5 is the structural representation of lock bracer among Fig. 1;

Fig. 6 is the structural representation of floating piston among Fig. 1;

Fig. 7 is the structural representation that supports lock ring among Fig. 1;

Among the figure: 1. piston, 2. floating piston, 3. fixed cover, 4. support lock ring, 5. the claw dead bolt is 6. adjusted pad, 7. cylinder cap is 8. locked bracer, 9. Returnning spring, 10. elastic card claw thread spindle, 11. claw dead bolt endoporus, 12. internal piston exhaust ports, 13. the Returnning spring mounting hole, 14. hole end surfaces, 15. big shoulder holes, 16. little shoulder hole, 17. fixed cover endoporus, 18. big straight cylinders, 19. oblique through hole, 20 sealed grooves, 21. stop surfaces, 22. short internal taper hole, 23. support the lock ring endoporus, and 24. support the lock ring thread spindle, 25. long internal taper hole, 26. hydraulic fluid ports, 27. elastic card claws., 28. locked groove, 29. cylinder barrel, 30. piston rod chambers, 31. piston rodless cavities, the stroke 32. the tapped hole in the floating piston, the big circular shaft 34. floating piston roundlet axles of 33. floating pistons 35. piston interior threaded holes 36. little straight cylinder 37. through hole L-are unblanked

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

Present embodiment adopts integrated designing technique, and the Lock device with two same action member structure innovation improves design, and in piston, its structure and rigging position are as shown in Figure 1 with the integrated design of lock device.

As shown in Figure 2, elastic card claw 27 is fixedly mounted on the cylinder cap 7 by its thread spindle 10, and described cylinder cap 7 is fixedly mounted on the cylinder barrel 29 by its screw thread, supports lock ring 4 and is fixedly mounted in the piston 1 by its thread spindle 24.As shown in Figure 7, supporting lock ring 4 right-hand members has segment length's internal taper hole 25, extruding claw dead bolt 5 when locking in order to latch mechanism, and supporting lock ring 4 left ends has a short internal taper hole 22, blocks claw dead bolt 5 after locking in order to latch mechanism.Fixed cover 3 is installed in the big shoulder hole 15 in the piston 1, and the supported lock ring 4 in the right side of fixed cover 3 withstands, and fixed cover 3 is fixed in the big shoulder hole 15 of piston 1.Big circular shaft 33 cooperations of floating piston are installed in the little shoulder hole 16 of piston 1, and 34 cooperations of floating piston roundlet axle are installed in the Returnning spring mounting hole 13 of piston 1, move axially steadily with assurance floating piston 2, not clamping stagnation.Returnning spring 9 is installed in the Returnning spring mounting hole 13 of piston 1, and Returnning spring 9 is being pressed in the left side of floating piston 2, and fixed cover 3 is pressed in the right side.As shown in Figure 6, the distance of the hole end surface 14 of the stop surface of floating piston 2 21 in the piston shown in Figure 31 is the shift motion of floating piston 2, just the stroke L that unblanks of latch mechanism as shown in Figure 1.As shown in Figure 6, on the big circular shaft 33 of floating piston a sealed groove 20 is arranged, in order to the dress seal ring, an oblique through hole 19 is arranged on the floating piston roundlet axle 34, in order to when floating piston 2 is moved to the left, gas in the enclosed cavity of 16 formation of the little shoulder hole in floating piston and the piston is expelled in the Returnning spring mounting hole 13, and logical atmosphere.One internal thread 32 is arranged in the floating piston 2, be used for connecting lock bracer 8, make floating piston 2 and lock bracer 8 become the interlock body.As shown in Figure 5, lock bracer 8 has a big straight cylinder 18, after latch mechanism is locked, big straight cylinder 18 parts cooperate in the endoporus 11 of the elastic card claw 27 of packing into, a part cooperates in the fixed cover endoporus 17 of the fixed cover 3 of packing into, after latch mechanism was unblanked, big straight cylinder 18 all cooperated in the fixed cover endoporus 17 of the fixed cover 3 of packing into.

The pressurized strut of the described built-in claw lock device of present embodiment is only as a kind of specific embodiments; the utility model protection domain is not done the qualification effect; therefore; every concrete structure in the foregoing description is done simple the replacement, the technological scheme that foregoing is carried out the material change should all not belong to the claimed scope of the utility model.Claw lock device described in the utility model is also applicable to the mechanical lock in the hydraulic actuator of other similar structure.

Claims (3)

1. the pressurized strut of a built-in claw lock device comprises the piston in cylinder barrel, cylinder cap and the cylinder barrel, it is characterized in that, is provided with elastic card claw in the described cylinder cap, and this elastic card claw one end is to be used for the thread spindle of fixedlying connected with cylinder cap, and the other end is the claw dead bolt; Be provided with the interlock lock-opening mechanism that matches with elastic card claw in the described piston; Described interlock lock-opening mechanism is made up of piston, support lock ring, Returnning spring, floating piston, lock bracer and fixed cover; Be provided with an interior threaded hole and two shoulder holes that link to each other in the described piston, interior threaded hole is used to be connected and fixed described support lock ring, big shoulder hole in the described piston is used to install described fixed cover, little shoulder hole is used to install described Returnning spring and floating piston, little shoulder hole end is provided with an exhaust port, connects with the piston rod free vent; Described support lock ring heads on fixed cover, forms a ring-like chamber between described support lock ring and the described fixed cover as the locked groove that matches with the claw dead bolt, and described floating piston one end is being pressed Returnning spring, and the other end heads on fixed cover.
2. according to the pressurized strut of the described built-in claw lock device of claim 1, it is characterized in that a tapped hole is arranged in the described floating piston, be used to be connected and fixed the lock bracer, make floating piston and lock bracer become the interlock body; The described floating piston little shoulder hole little circular shaft that adapts of the Returnning spring mounting hole of circular shaft and external diameter and piston greatly accordingly that is provided with external diameter and piston simultaneously, described big circular shaft is provided with the sealed groove that is used for adorning seal ring; The little circular shaft of floating piston is provided with an oblique through hole, and described oblique through hole is communicated with Returnning spring mounting hole and the enclosed cavity that is formed by little shoulder hole in floating piston and the piston; The width of described enclosed cavity, the distance of stop surface hole end surface of little shoulder hole in the piston that is floating piston is as the shift motion of floating piston, the stroke of promptly unblanking.
3. according to the pressurized strut of claim 1 or 2 described built-in claw lock devices, it is characterized in that, described lock bracer is the ladder straight cylinder, comprise a little straight cylinder and a big straight cylinder, described little straight cylinder is provided with one section tapped hole respective threads that is provided with floating piston inside, is used for being connected into the interlock body with floating piston; Described big straight cylinder cooperates with elastic card claw endoporus and floating piston endoporus simultaneously; Be provided with through hole with big straight cylinder end face on the described little straight cylinder.
CN2010202022549U 2010-05-25 2010-05-25 Actuator cylinder with built-in claw lock device CN201671913U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202022549U CN201671913U (en) 2010-05-25 2010-05-25 Actuator cylinder with built-in claw lock device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202022549U CN201671913U (en) 2010-05-25 2010-05-25 Actuator cylinder with built-in claw lock device

Publications (1)

Publication Number Publication Date
CN201671913U true CN201671913U (en) 2010-12-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102367823A (en) * 2011-11-03 2012-03-07 中航飞机起落架有限责任公司 Automatically reversible air cylinder device with built-in mechanical lock
CN104088853A (en) * 2014-06-25 2014-10-08 长治清华机械厂 Elastic clamping claw withdrawing type closed automatic locking mechanism for hydraulic cylinder
CN104088852A (en) * 2014-06-25 2014-10-08 长治清华机械厂 Elastic clamping claw closed automatic locking mechanism for hydraulic cylinder
CN104354854A (en) * 2014-10-29 2015-02-18 中航飞机起落架有限责任公司 Multifunctional undercarriage jackstay device
CN104500501A (en) * 2014-12-05 2015-04-08 四川凌峰航空液压机械有限公司 Hydraulic floatingsnap ring lock
CN104632787A (en) * 2015-02-12 2015-05-20 中航飞机起落架有限责任公司 Self-checking mechanism for lock state of internal mechanical lock of actuating cylinder
CN106089853A (en) * 2016-08-25 2016-11-09 中航飞机起落架有限责任公司 The pressurized strut of a kind of built-in machines lock and the method locking, unblank thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102367823A (en) * 2011-11-03 2012-03-07 中航飞机起落架有限责任公司 Automatically reversible air cylinder device with built-in mechanical lock
CN102367823B (en) * 2011-11-03 2014-05-28 中航飞机起落架有限责任公司 Automatically reversible air cylinder device with built-in mechanical lock
CN104088853A (en) * 2014-06-25 2014-10-08 长治清华机械厂 Elastic clamping claw withdrawing type closed automatic locking mechanism for hydraulic cylinder
CN104088852A (en) * 2014-06-25 2014-10-08 长治清华机械厂 Elastic clamping claw closed automatic locking mechanism for hydraulic cylinder
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
CN104354854A (en) * 2014-10-29 2015-02-18 中航飞机起落架有限责任公司 Multifunctional undercarriage jackstay device
CN104500501A (en) * 2014-12-05 2015-04-08 四川凌峰航空液压机械有限公司 Hydraulic floatingsnap ring lock
CN104500501B (en) * 2014-12-05 2017-01-25 四川凌峰航空液压机械有限公司 Hydraulic floatingsnap ring lock
CN104632787A (en) * 2015-02-12 2015-05-20 中航飞机起落架有限责任公司 Self-checking mechanism for lock state of internal mechanical lock of actuating cylinder
CN106089853A (en) * 2016-08-25 2016-11-09 中航飞机起落架有限责任公司 The pressurized strut of a kind of built-in machines lock and the method locking, unblank thereof
CN106089853B (en) * 2016-08-25 2018-04-17 中航飞机起落架有限责任公司 The pressurized strut and its locking of a kind of built-in machines lock, the method unlocked

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Granted publication date: 20101215