CN102162481A - Actuator cylinder of built-in buffer load-reducing device - Google Patents
Actuator cylinder of built-in buffer load-reducing device Download PDFInfo
- Publication number
- CN102162481A CN102162481A CN2011101094163A CN201110109416A CN102162481A CN 102162481 A CN102162481 A CN 102162481A CN 2011101094163 A CN2011101094163 A CN 2011101094163A CN 201110109416 A CN201110109416 A CN 201110109416A CN 102162481 A CN102162481 A CN 102162481A
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- cylinder
- ladder
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Fluid-Damping Devices (AREA)
- Actuator (AREA)
Abstract
The invention discloses an actuator cylinder of a built-in buffer load-reducing device, belonging to the field of aviation hydraulic actuator cylinders, for solving the problem of unobvious pure throttling buffer effect of the existing actuator cylinder. The actuator cylinder comprises a cylinder cover, a cylinder body, a piston rod and a piston, wherein the piston rod penetrates through the cylinder cover; the piston is arranged in the cylinder body, and is connected with the cylinder body through a locking nut; and a floating clearance which can move relative to the piston rod is arranged between a great ladder shaft end surface of the piston rod and the locking nut. According to the invention, a rapid return starting function can be kept without arranging a special return rapid oil supplying valve, simultaneously two tail ends of the actuator cylinder have buffer functions, moreover the loading output by the actuator cylinder is reduced in the buffer process, the collision and overloading extrusion of parts of the actuator cylinder or a moving mechanism are avoided, the structure of the actuator cylinder is simplified and compacted, and technology difficulty and manufacturing and using cost for manufacturing and assembly are reduced, and the stability and safety reliability are improved.
Description
Technical field
The present invention relates to hydraulic air pressurized strut field, be specifically related to a kind of hydraulic actuator of built-in buffering load shedding device.
Background technique
The working principle of tradition pressurized strut buffering load shedding device is: when the pressurized strut piston motion is arrived near end of travel, the liquid of one constant volume is closed by damping mechanism in low-pressure cavity, extrude through the throttle orifice in the throttling arrangement then, the unit time volume-variation reduces in the pressurized strut, cause back-pressure, thereby reduce piston rod and cylinder body speed of related movement, and convert kinetic energy to heat energy.And during the piston rod return,, need in buffering load shedding device, the quick delivery valve of backhaul be set for the toggle speed that guarantees piston is not subjected to the influence of damping mechanism throttling arrangement, therefore make pressurized strut structure very complicated; The throttling cushioning effect is subjected to condition influence such as part foozle, oil liquid temperature (being viscosity), piston movement speed bigger, instability; Buffering begins moment, and the big pulsating pressure of formation can produce impulse oscillation to hydraulic system in the buffer cavity, and simultaneously, throttling cushions and easily makes the too fast height of going up of system oil liquid temp; Between phase buffer and the pressurized strut piston rod movement finish before moment, the active force of pressurized strut output does not diminish, can cause moment overload extruding to motion or part, after the extruding of the overload of certain number of times, the part of motion and pressurized strut produces fatigue damage gradually repeatedly.
Development along with modern technologies, hydraulic actuator is proposed compactness simple for structure, multiple functional, reliable in quality, stable performance, is easy to safeguard the long lifetime, requirements such as manufacturing cost and use cost is low, therefore traditional throttling buffering form pressurized strut can not adapt to the especially development of present generation aircraft, warship technology of modern technologies gradually.
Summary of the invention
Above-mentioned defective at existing throttling buffering hydraulic actuator, the present invention aims to provide a kind of pressurized strut of built-in buffering load shedding device, need not to be provided with the quick delivery valve of special-purpose backhaul in this pressurized strut, return starts fast, can make the pressurized strut journey have pooling feature again at two ends, and the load of pressurized strut output between phase buffer reduces, avoid the part of motion or pressurized strut to bump and transship extruding, and the structure of simplification and compact pressurized strut, reduce technology difficulty and the manufacturing cost and use cost making and assemble, improve the stability of pressurized strut and the safety reliability of motion, satisfy the requirement of modern aviation and military technology development.
For achieving the above object, the basic technical scheme that the present invention takes is: the pressurized strut of described built-in buffering load shedding device, comprise cylinder cap and cylinder body, one piston rod and that passes this cylinder cap places the piston in the described cylinder body to link to each other by a locking nut, its structural feature is, the end that described piston rod links to each other with piston is provided with the ladder optical axis, and this ladder optical axis is provided with the big axial end of ladder; Described piston has movably flying height L of one section relative piston rod between the big axial end of ladder and locking nut.
The end that described piston rod links to each other with piston is provided with the ladder optical axis, and this ladder optical axis is provided with the big axial end of ladder; The A end of described piston is provided with the shoulder hole that is used to install piston rod, and a piston ladder aperture end face that cooperates with the big axial end of described ladder is arranged in this shoulder hole, and the B end of described piston is provided with inner groovy and groove end face, and this inner groovy communicates with shoulder hole.
Be provided with a plurality of uniform straight-through throttling pore between described inner groovy and the shoulder hole.
The B end of described piston is provided with a plurality of uniform direct through groove, and this direct through groove communicates with the inner groovy of piston.
Be provided with a circular groove in the shoulder hole of described piston, form an enclosed cavity between this circular groove and the described piston rod.
Be provided with the endoporus sealed groove in the described shoulder hole, be provided with the O RunddichtringO between this endoporus sealed groove and the described piston rod; Described outside piston is circumferentially with the cylindrical sealed groove, is provided with the O RunddichtringO between this cylindrical sealed groove and the described cylinder body.
The pressurized strut of described built-in buffering load shedding device is made up of cylinder cap, cylinder body, piston, piston rod, locking nut, self-locking back-up ring.Be provided with seal ring between described piston rod and the cylinder cap, described piston one end endoporus is provided with shoulder hole, be provided with a circular groove between in the shoulder hole, be provided with sealed groove in the ladder macropore, the piston the other end is provided with inner groovy, communicate with shoulder hole, described piston rod one end is provided with the ladder optical axis, the optical axis front end is a thread spindle, described piston is contained on the multidiameter shaft of described piston rod by the shoulder hole cooperation, described self-locking back-up ring engage sleeves is contained in the described locking nut, described locking nut is fixedly connected on the thread spindle of piston rod one end by screw thread, piston like this, piston rod, self-locking back-up ring and locking nut are formed and are the interlock body, pack in the lump in the cylinder barrel, piston has one section relative piston rod stroke that movably floats, i.e. one section flying height of piston and piston rod or piston and locking nut formation between the big axial end of ladder of piston rod and locking nut.
As specific embodiments, described piston concrete structure is: piston B end is provided with a plurality of uniform direct through groove, be provided with a plurality of straight-through throttling pore in the groove and communicate with the shoulder hole circular groove of piston, sealed groove in the piston ladder macropore is equipped with seal ring, piston is contained on the multidiameter shaft of described piston rod by the shoulder hole cooperation, between described piston and described piston rod, form a relative unsteady enclosed cavity, or described piston and described locking nut form one section flying height, and piston has one section relative piston rod stroke that movably floats between the big axial end of ladder of piston rod and locking nut.
Working principle of the present invention:
When hydraulic system supplies hydraulic oil in pressurized strut rodless cavity of the present invention, hydraulic oil is push piston left, piston A end is pushed piston rod and is moved to left end together, realize that piston rod starts fast, when piston A termination contacts cylinder cap, piston stops to move to left end, piston rod continues to move to left end under the hydraulic oil effect, gap between piston and the locking nut reduces gradually, enclosed cavity between piston and the piston rod increases gradually, the straight-through throttling pore of the fluid of rodless cavity by the piston inner groovy enters the enclosed cavity between piston and the piston rod, because the damping throttling that aperture produces, make piston rod slow down to the left end travelling speed, in the case, the active area of the hydraulic coupling of system is the suitable area of piston rod, so piston rod output load reduces, move with piston rod until locking nut and to touch the stop motion of groove end face, release is stretched out in pressurized strut.
In like manner, when hydraulic system supplies hydraulic oil in pressurized strut rod chamber of the present invention, hydraulic oil is push piston to the right, piston inner groovy B end is pushed locking nut and is driven piston rod and moves to right-hand member together, realize that piston rod starts fast, when piston B termination contacts the cylinder base end face, piston stops to move to right-hand member, under the effect of mechanism inertia force, piston rod continues to move to right-hand member, gap between piston and the locking nut increases gradually, and the enclosed cavity between piston and the piston rod reduces gradually, and the fluid in the enclosed cavity enters rodless cavity by the straight-through throttling pore of piston inner groovy, because the damping throttling that aperture produces, make piston rod slow down to the right-hand member travelling speed, touch the stop motion of piston ladder aperture end face until the big axial end of ladder, the pressurized strut contractive action finishes.
Compare with existing pressurized strut, the present invention has broken through the design philosophy of the simple throttling buffering of existing pressurized strut, innovation design buffering method and structure, when need not to be provided with the quick delivery valve of special-purpose backhaul and keeping quick return and start function, can make the pressurized strut journey have pooling feature again at two ends, and the load of pressurized strut output between phase buffer reduces, avoid the part of motion or pressurized strut to bump and transshipped extruding, and simplify and the compact structure of pressurized strut, reduce technology difficulty and the manufacturing cost and use cost making and assemble, improved the stability of pressurized strut and the safety reliability of motion.
Description of drawings
Fig. 1 is that an embodiment of the present invention begins to do the schematic representation when stretching out action or shrinking the end of end buffering;
Fig. 2 is that an embodiment of the present invention is stretched out the schematic representation when action is terminal to be cushioned;
Fig. 3 is that an embodiment of the present invention protrude end cushions the schematic representation when finishing or beginning to do contractive action;
Fig. 4 is the structural representation of piston rod of the present invention;
Fig. 5 is a structure of piston schematic representation of the present invention.
In the drawings:
The 1-cylinder cap, the 2-piston rod, 3, the 7-O RunddichtringO,
The 4-piston, the 5-locking nut, 6-self-locking back-up ring,
The 8-cylinder body, 9-piston rod ladder optical axis, the 10-thread spindle,
The big axial end of 11-ladder, the 12-shoulder hole, the 13-circular groove,
14-endoporus sealed groove, 15-cylindrical sealed groove, the 16-direct through groove,
17-groove end face, 18-leads directly to throttling pore, 19-piston ladder aperture end face,
20-piston inner groovy, the enclosed cavity that forms between 21-piston 4 and the piston rod 2,
The L-flying height.
Embodiment
The invention will be further elaborated below in conjunction with drawings and Examples.
A kind of pressurized strut of built-in buffering load shedding device as Fig. 1, Fig. 2, shown in Figure 3, comprises cylinder cap 1, cylinder body 8, piston 4, piston rod 2, locking nut 5, self-locking back-up ring 6 compositions.As shown in Figure 4, described piston rod 2 is provided with ladder optical axis 9, thread spindle 10, the big axial end 11 of ladder.As shown in Figure 5, described piston 4 one end endoporus are provided with shoulder hole 12 and piston ladder aperture end face 19, be provided with a circular groove 13 between the shoulder hole 12, be provided with sealed groove 14 in the ladder macropore, the piston the other end is provided with inner groovy 20 and groove end face 17, this inner groovy 20 communicates with shoulder hole 12, be provided with a plurality of uniform straight-through throttling pore 18 between described inner groovy 20 and the shoulder hole 12, piston 4 cylindricals are circumferentially with sealed groove 15, piston B end is provided with a plurality of uniform direct through groove 16 that communicate with inner groovy 20, as shown in Figure 5; Described piston 4 is contained on the multidiameter shaft 9 of described piston rod by shoulder hole 12 cooperations, described self-locking back-up ring 6 engage sleeves are contained in the described locking nut 5, described locking nut 5 is fixedly connected on the thread spindle 10 of piston rod by screw thread, piston, piston rod, self-locking back-up ring and locking nut are formed and are the interlock body like this, pack in the lump in the cylinder body 8, piston 4 has one section relative piston rod 2 stroke that movably floats between the big axial end 11 of ladder of piston rod 2 and locking nut 5, promptly piston 4 forms one section flying height L with piston rod 5 or piston 4 with locking nut 5.When piston 4 moves to cylinder body 8 bottoms, the piston rod 2 a bit of stroke that can also move, this trip is no more than flying height L.
Claims (6)
1. the pressurized strut of a built-in buffering load shedding device, comprise cylinder cap (1) and cylinder body (8), one piston rod (2) and that passes this cylinder cap (1) places the piston (4) in the described cylinder body (8) to link to each other by a locking nut (5), it is characterized in that, the end that described piston rod (2) links to each other with piston (4) is provided with ladder optical axis (9), and this ladder optical axis (9) is provided with the big axial end of ladder (11); Described piston (4) has movably flying height L of one section relative piston rod (2) between the big axial end of ladder (11) and locking nut (5).
2. the pressurized strut of built-in buffering load shedding device according to claim 1, it is characterized in that, the A end of described piston (4) is provided with the shoulder hole (12) that is used to install piston rod (2), a piston ladder aperture end face (19) that cooperates with the big axial end of described ladder (11) is arranged in this shoulder hole (12), the B end of described piston (4) is provided with inner groovy (20) and groove end face (17), and this inner groovy (20) communicates with shoulder hole (12).
3. the pressurized strut of built-in buffering load shedding device according to claim 2 is characterized in that, is provided with a plurality of uniform straight-through throttling pore (18) between described inner groovy (20) and the shoulder hole (12).
4. the pressurized strut of built-in buffering load shedding device according to claim 2 is characterized in that, the B end of described piston (4) is provided with a plurality of uniform direct through groove (16), and this direct through groove (16) communicates with the inner groovy (20) of piston (4).
5. according to the pressurized strut of the described built-in buffering load shedding device of one of claim 1-4, it is characterized in that, be provided with a circular groove (13) in the shoulder hole (12) of described piston (4), form an enclosed cavity (21) between this circular groove (13) and the described piston rod (2).
6. the pressurized strut of built-in buffering load shedding device according to claim 5 is characterized in that, is provided with endoporus sealed groove (14) in the described shoulder hole (12), is provided with O RunddichtringO (3) between this endoporus sealed groove (14) and the described piston rod (2); Described piston (4) cylindrical is circumferentially with cylindrical sealed groove (15), is provided with O RunddichtringO (7) between this cylindrical sealed groove (15) and the described cylinder body (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109416.3A CN102162481B (en) | 2011-04-29 | 2011-04-29 | Actuator cylinder of built-in buffer load-reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110109416.3A CN102162481B (en) | 2011-04-29 | 2011-04-29 | Actuator cylinder of built-in buffer load-reducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102162481A true CN102162481A (en) | 2011-08-24 |
| CN102162481B CN102162481B (en) | 2014-08-13 |
Family
ID=44463875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110109416.3A Active CN102162481B (en) | 2011-04-29 | 2011-04-29 | Actuator cylinder of built-in buffer load-reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102162481B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602534A (en) * | 2012-04-05 | 2012-07-25 | 中航飞机起落架有限责任公司 | Shimmy damping device for landing gear |
| CN103523218A (en) * | 2013-10-12 | 2014-01-22 | 中国航天空气动力技术研究院 | Unmanned plane damping-adjustable front-wheel shimmy-damper |
| CN108791823A (en) * | 2018-06-19 | 2018-11-13 | 中航飞机起落架有限责任公司 | A kind of undercarriage vehicle frame stablizes buffer unit and its control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2454069A1 (en) * | 1974-02-20 | 1975-08-21 | Hans Baumgartner & Co Zollikon | Double acting door actuator - has damping system with sliding valves within and on piston rod |
| CN2264269Y (en) * | 1996-08-14 | 1997-10-08 | 羌志萍 | Thrust hydro-cylinder of mine hydraulic prop |
| JPH10297896A (en) * | 1997-04-25 | 1998-11-10 | Toyota Autom Loom Works Ltd | Buffer device of reach cylinder |
| US20080164449A1 (en) * | 2007-01-09 | 2008-07-10 | Gray Joseph L | Passive restraint for prevention of uncontrolled motion |
| US20100012451A1 (en) * | 2008-07-16 | 2010-01-21 | Mando Corporation | Amplitude selective shock absorber |
| CN201391511Y (en) * | 2009-03-26 | 2010-01-27 | 安徽星马汽车股份有限公司 | Hydraulic cylinder cushioning device |
| CN201771889U (en) * | 2010-08-30 | 2011-03-23 | 福建省龙岩液压有限公司 | Novel hydraulic cylinder with variable throttling buffer structure |
-
2011
- 2011-04-29 CN CN201110109416.3A patent/CN102162481B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2454069A1 (en) * | 1974-02-20 | 1975-08-21 | Hans Baumgartner & Co Zollikon | Double acting door actuator - has damping system with sliding valves within and on piston rod |
| CN2264269Y (en) * | 1996-08-14 | 1997-10-08 | 羌志萍 | Thrust hydro-cylinder of mine hydraulic prop |
| JPH10297896A (en) * | 1997-04-25 | 1998-11-10 | Toyota Autom Loom Works Ltd | Buffer device of reach cylinder |
| US20080164449A1 (en) * | 2007-01-09 | 2008-07-10 | Gray Joseph L | Passive restraint for prevention of uncontrolled motion |
| US20100012451A1 (en) * | 2008-07-16 | 2010-01-21 | Mando Corporation | Amplitude selective shock absorber |
| CN201391511Y (en) * | 2009-03-26 | 2010-01-27 | 安徽星马汽车股份有限公司 | Hydraulic cylinder cushioning device |
| CN201771889U (en) * | 2010-08-30 | 2011-03-23 | 福建省龙岩液压有限公司 | Novel hydraulic cylinder with variable throttling buffer structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602534A (en) * | 2012-04-05 | 2012-07-25 | 中航飞机起落架有限责任公司 | Shimmy damping device for landing gear |
| CN102602534B (en) * | 2012-04-05 | 2015-04-08 | 中航飞机起落架有限责任公司 | Shimmy damping device for landing gear |
| CN103523218A (en) * | 2013-10-12 | 2014-01-22 | 中国航天空气动力技术研究院 | Unmanned plane damping-adjustable front-wheel shimmy-damper |
| 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 |
| CN108791823A (en) * | 2018-06-19 | 2018-11-13 | 中航飞机起落架有限责任公司 | A kind of undercarriage vehicle frame stablizes buffer unit and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102162481B (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107339360B (en) | A kind of undercarriage buffer | |
| CN201554719U (en) | High-speed two-out bar hydraulic cylinder cushion device | |
| CN106402077B (en) | Hydraulic actuator class output speed controlled hydraulic circuit system | |
| CN202851488U (en) | Bi-direction hydraulic lock and landing leg control system and construction vehicle | |
| KR101310686B1 (en) | Hydraulic shock absorber | |
| CN102162481B (en) | Actuator cylinder of built-in buffer load-reducing device | |
| CN112431816B (en) | End buffer device for controlling movement speed of hydraulic actuating cylinder by oil damping | |
| CN105443638A (en) | Energy storing type buffer | |
| CN104930015A (en) | Oil gas type load reduction pneumatic actuator cylinder and load reduction method thereof | |
| CN203836056U (en) | Buffer for helicopter | |
| CN201671913U (en) | Actuator cylinder with built-in claw lock device | |
| CN203051288U (en) | Hydraulic cylinder, driving mechanism and concrete conveying machinery | |
| CN210599667U (en) | Actuator cylinder with built-in mechanical locks at two ends | |
| CN103640694B (en) | A kind of buffering off-load arrester hook hook arm | |
| CN2835699Y (en) | Hydro-pneumatic buffer | |
| CN102678813B (en) | Buffer device and anti-back-tilting device of arm support with same | |
| CN105020316A (en) | Undercarriage buffer | |
| CN104314917B (en) | A kind of suitable in heavy duty local synchronization multi-stage oil cylinder | |
| CN212131166U (en) | Friction-viscous damper capable of providing composite damping | |
| CN108547826A (en) | A kind of built-in gas-liquid mixed buffering stretching type high-speed cylinder | |
| CN206458761U (en) | A kind of high-effect oil buffer | |
| CN110725883A (en) | Energy storage type buffer | |
| CN204533055U (en) | The two-way claw lock construction of undercarriage control pressurized strut | |
| CN103629188B (en) | Buffer device for actuator drum | |
| CN210565963U (en) | Temperature compensation damping pneumatic actuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |