CN204356005U - Multistage pressurized strut aircraft jack - Google Patents

Multistage pressurized strut aircraft jack Download PDF

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Publication number
CN204356005U
CN204356005U CN201420855030.6U CN201420855030U CN204356005U CN 204356005 U CN204356005 U CN 204356005U CN 201420855030 U CN201420855030 U CN 201420855030U CN 204356005 U CN204356005 U CN 204356005U
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CN
China
Prior art keywords
pipeline
pressurized strut
check valve
fuel tank
force pump
Prior art date
Application number
CN201420855030.6U
Other languages
Chinese (zh)
Inventor
赵书斌
刘世峤
Original Assignee
哈尔滨通航科技开发有限公司
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Filing date
Publication date
Application filed by 哈尔滨通航科技开发有限公司 filed Critical 哈尔滨通航科技开发有限公司
Priority to CN201420855030.6U priority Critical patent/CN204356005U/en
Application granted granted Critical
Publication of CN204356005U publication Critical patent/CN204356005U/en

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Abstract

Multistage pressurized strut aircraft jack, relates to a kind of aircraft jack.The utility model is little in order to solve the effective forced stroke of existing jack, and safety is low, and ejection height controls dumb and not problem accurately.Mechanical screws, second piston rod, first stage piston bar, pressurized strut connects successively, pressurized strut is arranged on fuel tank, fuel tank and the first check valve are arranged on base, first check valve is provided with force pump, the lower chambers of force pump is connected with the first check valve and fuel tank successively by the first pipeline, oil filter is arranged on the first pipeline, force pump is connected with pressurized strut by the second pipeline, second pipeline is provided with the second check valve, 3rd pipeline connects the second pipeline and fuel tank, 3rd pipeline is provided with safety valve, 4th pipeline connects the second pipeline and the 3rd pipeline, oil return switch is arranged on the 4th pipeline.Ejection height control of the present utility model is flexible and accurate.

Description

Multistage pressurized strut aircraft jack
Technical field
The utility model relates to a kind of aircraft jack, is specifically related to a kind of multistage pressurized strut aircraft jack, belongs to aircraft maintenance technical field of auxiliary equipment.
Background technology
Alighting gear is the vitals of aircraft, and in the structure of alighting gear, vital effect is played in pressurized strut.In each working part of present generation aircraft Landing Gear System, the probability that jack in use occurs to lose efficacy is higher, and the maintenance of undercarriage retractable actuating cylinder and failture evacuation seem particularly important.But in maintenance process, adopt existing jack to support, there is the problem that aircraft is little apart from ground space, namely effective forced stroke of existing jack is too small; In addition, because the weight of aircraft own is excessive, may there is the problem of ejecting mechanism indentation in existing jack, lack safety measures, brings huge hidden danger to the personal safety of staff; Moreover existing jack ejection height controls dumb, not precisely.
Summary of the invention
The purpose of this utility model is to provide a kind of multistage pressurized strut aircraft jack, little to solve the effective forced stroke of existing jack, may be there is ejecting mechanism indentation in jack, bring huge hidden danger to the personal safety of staff, and ejection height controls dumb and not problem accurately.
The utility model in order to solve the problems of the technologies described above taked technical scheme is:
Multistage pressurized strut aircraft jack of the present utility model, comprises mechanical screws, second piston rod, the first jam nut, first stage piston bar, the second jam nut, the first check valve, fuel tank, base, breather stem vent plug, pressurized strut, force pump, the first pipeline, oil filter, the second pipeline, the second check valve, oil return switch, the 3rd pipeline, safety valve and the 4th pipeline;
The lower end of mechanical screws is inserted in second piston rod and both are threaded, the lower end of second piston rod is inserted in first stage piston bar and both are threaded, the lower end of first stage piston bar is directly inserted in pressurized strut endoporus, first jam nut is threaded with second piston rod, second jam nut is threaded with first stage piston bar, pressurized strut is arranged on fuel tank, fuel tank is arranged on base, fuel tank is provided with breather stem vent plug, base is also provided with the first check valve, first check valve is provided with force pump, the lower chambers of force pump is connected with the first check valve and fuel tank successively by the first pipeline, oil filter is arranged on the first pipeline, and oil filter is between fuel tank and the first check valve, the lower chambers of force pump is also connected with pressurized strut by the second pipeline, second pipeline is provided with the second check valve, 3rd pipeline connects the second pipeline and fuel tank, the node of the 3rd pipeline and the second pipeline is between the second check valve and force pump, 3rd pipeline is provided with safety valve, 4th pipeline connects the second pipeline and the 3rd pipeline, the node of the 4th pipeline and the second pipeline is between the second check valve and pressurized strut, the node of the 4th pipeline and the 3rd pipeline is between safety valve and fuel tank, oil return switch is arranged on the 4th pipeline.
Preferred: described multistage pressurized strut aircraft jack also comprises handle, and described handle is fixedly mounted on fuel tank.Setting like this, is convenient to carrying.
Preferred: described multistage pressurized strut aircraft jack also comprises sliding wheel, described sliding wheel by support installing on base.Setting like this, is convenient to carrying.
Preferred: described multistage pressurized strut aircraft jack also comprises handle, and described handle is arranged on base.Setting like this, uses convenient.
The utility model compared with prior art has following effect: multistage pressurized strut aircraft jack structure of the present utility model is simple, effective forced stroke is large, jam nut is utilized to limit ejecting mechanism indentation, ensure that the personal safety of staff, utilize pipeline arrangement and valve body break-make to realize the control of ejection height, control is flexible and accurate.
Accompanying drawing explanation
Fig. 1 is the block diagram of the utility model multistage pressurized strut aircraft jack;
Fig. 2 is the fundamental diagram of the utility model multistage pressurized strut aircraft jack.
In figure: 1-mechanical screws; 2-second piston rod; 3-first jam nut; 4-first stage piston bar; 5-second jam nut; 6-handle; 7-rocking arm; 8-first check valve; 9-fuel tank; 10-base; 11-sliding wheel; 14-breather stem vent plug; 15-pressurized strut; 16-handle; 17-force pump; 18-first pipeline; The filter of 19-oil; 20-second pipeline; 21-second check valve; 22-oil return switch; 23-the 3rd pipeline; 24-safety valve; 25-the 4th pipeline.
Detailed description of the invention
Elaborate the utility model with reference to the accompanying drawings preferred embodiment below.
As shown in the figure, multistage pressurized strut aircraft jack described in the utility model comprises mechanical screws 1, second piston rod 2, first jam nut 3, first stage piston bar 4, second jam nut 5, first check valve 8, fuel tank 9, base 10, breather stem vent plug 14, pressurized strut 15, force pump 17, first pipeline 18, oil filter the 19, second pipeline 20, second check valve 21, oil return switch 22, the 3rd pipeline 23, safety valve 24 and the 4th pipeline 25;
The lower end of mechanical screws 1 is inserted in second piston rod 2 and both are threaded, the lower end of second piston rod 2 is inserted in first stage piston bar 4 and both are threaded, the lower end of first stage piston bar 4 is directly inserted in pressurized strut 15 endoporus, first jam nut 3 is threaded with second piston rod 2, second jam nut 5 is threaded with first stage piston bar 4, pressurized strut 15 is arranged on fuel tank 9, fuel tank 9 is arranged on base 10, fuel tank 9 is provided with breather stem vent plug 14, base 10 is also provided with the first check valve 8, first check valve 8 is provided with force pump 17, the lower chambers of force pump 17 is connected with the first check valve 8 and fuel tank 9 successively by the first pipeline 18, oil filter 19 is arranged on the first pipeline 18, and oil filter 19 is between fuel tank 9 and the first check valve 8, the lower chambers of force pump 17 is also connected with pressurized strut 15 by the second pipeline 20, second pipeline 20 is provided with the second check valve 21, 3rd pipeline 23 connects the second pipeline 20 and fuel tank 9, the node of the 3rd pipeline 23 and the second pipeline 20 is between the second check valve 21 and force pump 17, 3rd pipeline 23 is provided with safety valve 24, 4th pipeline 25 connects the second pipeline 20 and the 3rd pipeline 23, the node of the 4th pipeline 25 and the second pipeline 20 is between the second check valve 21 and pressurized strut 15, the node of the 4th pipeline 25 and the 3rd pipeline 23 is between safety valve 24 and fuel tank 9, oil return switch 22 is arranged on the 4th pipeline 25.Described multistage pressurized strut aircraft jack also comprises handle 6, and described handle 6 is fixedly mounted on fuel tank 9.Described multistage pressurized strut aircraft jack also comprises sliding wheel 11, described sliding wheel 11 by support installing on base 10.Described multistage pressurized strut aircraft jack also comprises handle 16, and described handle 16 is arranged on base 10.
Working process:
When oil return switch 22 cuts out, when mentioning the rocking arm 7 of force pump 17, the piston of force pump 17 moves and makes its actual displacement increase formation vacuum, the oil that fuel tank is 9 li, just under barometric pressure effect, enters force pump 17 cavity of resorption by oil filter 19 and the first check valve 8; When depressing the rocking arm 7 of force pump 17, the plunger of force pump 17 moves down, and extrudes the fluid of its cavity of resorption, and this part pressure oil just backs down the second check valve 21 and enters pressurized strut 15, promotes pressurized strut 15 inner carrier thus jack-up weight.When mentioning the rocking arm 7 of force pump 17 again, the pressure oil in pressurized strut 15 will be attempted to blow back into force pump 17, and now the second check valve 21 is closed automatically, make oily unlikely refluence, this guarantees that weight is unlikely to fall voluntarily; During the rocking arm 7 of pressure force pump 17, the first check valve 8 is closed automatically, makes that hydraulic oil is unlikely blows back into fuel tank 9, and can only enter pressurized strut 15 by weight jack-up.Like this, when rocking arm 7 is repeatedly mentioned and depresses, force pump 17 cavity of resorption constantly hockets oil suction and oil extraction process, and pressure oil constantly enters pressurized strut 15, by weight little by little jack-up.When putting down weight, open oil return switch 22, the piston of pressurized strut 15 just moves down under weight effect, and the fluid in pressurized strut 15 is squeezed oil sump tank 9.Mounting safety valve 24 on the 3rd pipeline 23, when jacking load reaches the rated load of 105% ~ 112%, high pressure oil through safety valve 24 oil sump tank 9, to avoid causing accident because of overload.
The exemplary illustration of present embodiment just to this patent, does not limit its protection domain, and those skilled in the art can also change, as long as no the Spirit Essence exceeding this patent, in the protection domain of this patent its local.

Claims (4)

1. multistage pressurized strut aircraft jack, comprises mechanical screws (1), second piston rod (2), the first jam nut (3), first stage piston bar (4), the second jam nut (5), the first check valve (8), fuel tank (9), base (10), breather stem vent plug (14), pressurized strut (15), force pump (17), the first pipeline (18), oil filter (19), the second pipeline (20), the second check valve (21), oil return switch (22), the 3rd pipeline (23), safety valve (24) and the 4th pipeline (25);
It is characterized in that: the lower end of mechanical screws (1) is inserted in second piston rod (2) and both are threaded, the lower end of second piston rod (2) is inserted in first stage piston bar (4) and both are threaded, the lower end of first stage piston bar (4) is directly inserted in pressurized strut (15) endoporus, first jam nut (3) is threaded with second piston rod (2), second jam nut (5) is threaded with first stage piston bar (4), pressurized strut (15) is arranged on fuel tank (9), fuel tank (9) is arranged on base (10), fuel tank (9) is provided with breather stem vent plug (14), base (10) is also provided with the first check valve (8), first check valve (8) is provided with force pump (17), the lower chambers of force pump (17) is connected with the first check valve (8) and fuel tank (9) successively by the first pipeline (18), oil filter (19) is arranged on the first pipeline (18), and oil filter (19) is positioned between fuel tank (9) and the first check valve (8), the lower chambers of force pump (17) is also connected with pressurized strut (15) by the second pipeline (20), second pipeline (20) is provided with the second check valve (21), 3rd pipeline (23) connects the second pipeline (20) and fuel tank (9), the node of the 3rd pipeline (23) and the second pipeline (20) is positioned between the second check valve (21) and force pump (17), 3rd pipeline (23) is provided with safety valve (24), 4th pipeline (25) connects the second pipeline (20) and the 3rd pipeline (23), the node of the 4th pipeline (25) and the second pipeline (20) is positioned between the second check valve (21) and pressurized strut (15), the node of the 4th pipeline (25) and the 3rd pipeline (23) is positioned between safety valve (24) and fuel tank (9), oil return switch (22) is arranged on the 4th pipeline (25).
2. multistage pressurized strut aircraft jack according to claim 1, is characterized in that: described multistage pressurized strut aircraft jack also comprises handle (6), and described handle (6) is fixedly mounted on fuel tank (9).
3. multistage pressurized strut aircraft jack according to claim 2, is characterized in that: described multistage pressurized strut aircraft jack also comprises sliding wheel (11), described sliding wheel (11) by support installing on base (10).
4. multistage pressurized strut aircraft jack according to claim 3, is characterized in that: described multistage pressurized strut aircraft jack also comprises handle (16), and described handle (16) is arranged on base (10).
CN201420855030.6U 2014-12-30 2014-12-30 Multistage pressurized strut aircraft jack CN204356005U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420855030.6U CN204356005U (en) 2014-12-30 2014-12-30 Multistage pressurized strut aircraft jack

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Application Number Priority Date Filing Date Title
CN201420855030.6U CN204356005U (en) 2014-12-30 2014-12-30 Multistage pressurized strut aircraft jack

Publications (1)

Publication Number Publication Date
CN204356005U true CN204356005U (en) 2015-05-27

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105439032A (en) * 2015-12-04 2016-03-30 沈阳飞研航空设备有限公司 Main aircraft wheel jack
CN105439039A (en) * 2015-12-04 2016-03-30 沈阳飞研航空设备有限公司 Device for replacing airplane wheel of front landing gear
CN106185754A (en) * 2016-09-23 2016-12-07 江西洪都航空工业集团有限责任公司 A kind of undercarriage hands over inspection to guarantee the quality Labour-saving car
CN106829786A (en) * 2016-12-22 2017-06-13 合肥迅达电器有限公司 A kind of hand hydraulic jack for possessing filtering machine oil effect
CN107651602A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of hydraulic means system of preposition jack
CN107651605A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of preposition jack structure and its design principle
CN107651603A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of main wheel jack structure and its design principle
CN109373811A (en) * 2018-09-27 2019-02-22 北京空间机电研究所 A kind of multistage actuation catapult-launching gear using travelling charge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105439032A (en) * 2015-12-04 2016-03-30 沈阳飞研航空设备有限公司 Main aircraft wheel jack
CN105439039A (en) * 2015-12-04 2016-03-30 沈阳飞研航空设备有限公司 Device for replacing airplane wheel of front landing gear
CN107651602A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of hydraulic means system of preposition jack
CN107651605A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of preposition jack structure and its design principle
CN107651603A (en) * 2016-07-26 2018-02-02 沈阳市松陵工具厂 A kind of main wheel jack structure and its design principle
CN106185754A (en) * 2016-09-23 2016-12-07 江西洪都航空工业集团有限责任公司 A kind of undercarriage hands over inspection to guarantee the quality Labour-saving car
CN106829786A (en) * 2016-12-22 2017-06-13 合肥迅达电器有限公司 A kind of hand hydraulic jack for possessing filtering machine oil effect
CN109373811A (en) * 2018-09-27 2019-02-22 北京空间机电研究所 A kind of multistage actuation catapult-launching gear using travelling charge
CN109373811B (en) * 2018-09-27 2021-02-09 北京空间机电研究所 Multi-stage actuating ejection device adopting follow-up charging

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