CN101870358A - Toggle type nose wheel steering mechanism and work method - Google Patents
Toggle type nose wheel steering mechanism and work method Download PDFInfo
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- CN101870358A CN101870358A CN201010207465A CN201010207465A CN101870358A CN 101870358 A CN101870358 A CN 101870358A CN 201010207465 A CN201010207465 A CN 201010207465A CN 201010207465 A CN201010207465 A CN 201010207465A CN 101870358 A CN101870358 A CN 101870358A
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Abstract
The invention relates to a toggle type nose wheel steering mechanism and a work method, belonging to the field of airplane nose gear manipulation nose wheel steering mechanisms. Compared with the traditional rack and pinion type steering mechanism, a push-and-pull actuator cylinder serves as an actuating device, thereby improving the safety life of the mechanism; the mechanism fully uses the lower toggle length and increases the steering mechanism force arm through the space distribution and the main structure of the invention is open, thereby facilitating the improvement of the system maintainability; compared with the double-actuator cylinder type steering mechanism, the panel motion of the double actuator cylinders of the double-actuator cylinder type steering mechanism is changed into space motion, and the double actuators are distributed at the position of an upper toggle on the traditional nose landing gear to replace the original toggle, thereby saving space and increasing the functions of the mechanism while not influencing the maintainability.
Description
Technical field
The invention belongs to the aircraft nose-gear and handle the nose wheel steering mechanism field.
Technical background
With reference to " data such as the relevant report of airplane design handbook the 14th fascicle, " Aircraft Landing Gear Design:Principlesand Practices " and SAE, the aircraft nose wheel turning mechanism mainly contains two kinds of design forms at present both at home and abroad, be rack-and-gear and make movable barrel type, wherein blimp mainly adopts pinion and-rack, and large aircraft is then in the majority with double cropping movable barrel type turning mechanism.
The pinion and-rack turning mechanism is used in the middle-size and small-size aircraft more.The nose wheel steering control mechanism transmission of rack-and-gear form is steady continuously, and compact conformation is easy to realize the control of hydraulic efficiency pressure system, and driving efficiency is higher, and comparatively stable; Because it generally was that phenomenons such as crackle, wearing and tearing or plastic deformation appear earlier in certain single gear teeth when losing efficacy, and is little to the influence of overall performance, so its reliability is higher.Simultaneously, because its structure is too compact, maintainability performance is not high; Make with setting accuracy and require height, cost is higher; Because the flexure stress maximum at tooth root place, endurance crack can appear in the tooth root place, easily causes fatigue fracture; The contact stress of flank of tooth contact position is a fluctuating circulating stress, and stress value is very big, forms spot corrosion easily; In addition, flank of tooth gummed also appears in its structure easily, tooth surface abrasion, and failure phenomenons such as flank of tooth plastic deformation are difficult for satisfying intensity and tired requirement, and service life is lower.
Double cropping movable barrel type turning mechanism is made up of two push-and-pull pressurized struts, is used in medium-and-large-sized aircraft in a large number, as Boeing series passenger plane and Air Passenger A330, A340, A380 etc.Double cropping movable barrel type turning mechanism can provide bigger operating torque, and its reliable in structure, the intensity that is content with very little and tired requirement, service life is than length and be easy to reduce weight, but actuation mechanism all is positioned at same plane, mechanism takes up room greatly, and then the requirement that rises before making the folding and unfolding space increases; Because front-wheel is in rotation process, the angle of pressurized strut is changing always, and needs complicated hydraulic efficiency pressure system to control, so the rotational efficiency instability, is difficult to guarantee its reliability; Low to making with the dependence of setting accuracy, be easy to control cost; Because its structure distribution is looser, so access for repair and maintenance.But because its rotation is not uniform rotation and the interference that is subject to external factor, so transmission is steady inadequately; Loosely organized, the folding and unfolding of inconvenient alighting gear.
Summary of the invention
Purpose of the present invention: compare with conventional gears rack-and-pinion turning mechanism, the present invention adopts the push-and-pull pressurized strut as actuation mechanism, improved mechanism's safe life, mechanism makes full use of down toggle length simultaneously, increased mechanism's turning arm of force by spatial destribution, and keystone configuration is opened wide, and is beneficial to the maintainability performance that improves mechanism; Compare with double cropping movable barrel type turning mechanism, the present invention is transformed into space motion with the plane motion of two pressurized struts of double cropping movable barrel type turning mechanism, and it is arranged in the position of the last toggle of traditional nose-gear, replace original toggle of going up, when not influencing maintainability performance, both save the space, increased the function of mechanism again.
A kind of toggle type nose wheel steering mechanism, it is characterized in that: comprise that boxed rod, boxed rod lower end that the upper end links to each other with pillar urceolus sleeve by articulated manner link to each other with following toggle upper end by articulated manner, following toggle lower end links to each other with the lower adaptor of support piston bar by articulated manner; Also comprise the cross tube that is fixed on the pillar urceolus, be fixed on the boxed rod lower end or the sheer pole of toggle upper end down, and two are installed on pressurized strut between cross tube and the sheer pole by top connection, lower adaptor respectively; The rotary freedom that all has both direction between above-mentioned pressurized strut and cross tube and the sheer pole; Above-mentioned two planes, pressurized strut place and boxed rod be coplane not.
Utilize the method for work of above-mentioned toggle type nose wheel steering mechanism, it is characterized in that: (a), handle Nose Wheel Steering: when aircraft floor slides, the maneuvering system signal for turn is received by mechanism, two pressurized struts of valve control system control cooperate start, one side pressurized strut pushes away, and a side pressurized strut is drawn, two pressurized strut length variations, toggle and the lower adaptor of support piston bar are rotated around piston rod together under driving, and promptly drive Nose Wheel Steering; (b), front-wheel subtracts the pendulum function: when the ground taxi of aircraft high speed, filling pressure in two pressurized struts, and by with two pressurized strut bonded assembly Hydraulic Elements subtract the pendulum damper hole, provide front-wheel to subtract pendulum damper, satisfy front-wheel and subtract the pendulum function; (c), transfer torque function: when takeoff and landing, the locked pressurized strut of filling pressure in the pressurized strut chamber makes it can bear axial force, thereby makes two piston barrels and boxed rod play the torsion pass effect jointly, transmits wheel and is subjected to runway to impact the torsional moment that produces.
Beneficial effect of the present invention: 1, contrast pinion and-rack turning mechanism, the present invention adopts two pressurized struts as actuation mechanism, and structure is opened wide, and maintainability performance is better, safe life is longer; 2, contrast double cropping movable barrel type turning mechanism, the present invention makes full use of the spatial destribution and the space motion of mechanism, subtract on the function basis of pendulum at satisfied manipulation Nose Wheel Steering and front-wheel, reducing mechanism occupation space greatly, make turning mechanism have the function of toggle transfer torque on traditional nose-gear simultaneously, simplify the nose-gear system on the whole, alleviate the nose-gear system weight; 3, mechanism provides by following toggle and handles turning moment, can make full use of down the bigger manipulation turning arm of force of length acquisition of toggle, and then reduces requirement that pressurized strut is used as power, alleviates structural weight; 4, suitable blimp and the extraordinary aircraft higher to nose-gear folding and unfolding space requirement of being loaded on improves aircraft ground maneuver ability.
Description of drawings
Accompanying drawing 1 toggle type nose wheel steering mechanism structural representation.
Accompanying drawing 2 toggle type nose wheel steering mechanism front elevations and corresponding section-drawing.Fig. 2-the 1st wherein, toggle type nose wheel steering mechanism front elevation, Fig. 2-2 are the A-A cutaway view among Fig. 2-1.
Accompanying drawing 3 toggle type nose wheel steering mechanism scheme of installations.
Number in the figure title: 1, pillar urceolus, 2, cross tube, 3, top connection, 4, pillar urceolus sleeve, 5, handle pressurized strut, 6, boxed rod, 7, sheer pole, 8, lower adaptor, 9, following toggle, 10, the lower adaptor of support piston bar, 11, bearing washer, 12, wheel.
The specific embodiment
Toggle type nose wheel steering mechanism and mounting arrangements are shown in accompanying drawing 1,2,3.In this brief description principle of work of the present invention.
(a), handle the Nose Wheel Steering function.When aircraft low speed slides, the maneuvering system signal for turn is received by mechanism, two of valve control system controls are handled pressurized strut 5 and are cooperated start, one side pressurized strut pushes away, one side pressurized strut is drawn, two variations of handling pressurized strut 5 length, make by cross tube 2, two top connections 3, two handle pressurized strut 5, two connecting rod mechanisms generation deformation that lower adaptor 8 is formed jointly, cause 6 times end junctions of boxed rod to rotate, and then by 9 pairs of support piston bars of toggle and support piston bar lower adaptor 10 produce a manipulation turning moment, the satisfied Nose Wheel Steering function of handling down.
(b), front-wheel subtracts the pendulum function.When aircraft slided at a high speed, two handled the certain pressure of filling in the pressurized struts 5, and subtracted the pendulum damper hole by what handle pressurized strut bonded assembly Hydraulic Elements with two, provided front-wheel to subtract pendulum damper, satisfied front-wheel and subtracted the pendulum function.
(c), go up toggle torsion pass function.Two handle pressurized strut 5 is articulated and connected with cross tube 2 and boxed rod 6 respectively by doing top connection 3 and lower adaptor 8, wherein the lower end of boxed rod 6 is articulated and connected with following toggle 9 again, when takeoff and landing, the pillar amount of compression changes, toggle type nose wheel steering mechanism can fold with following toggle 9, meets the demands; Simultaneously, handle the big pressure of 5 liang of chamber fillings of pressurized strut, so restriction pressurized strut campaign, locked pressurized strut makes it can bear certain axial force, and two manipulation pressurized struts, 5 combinations can be transmitted wheel 12 and are subjected to runway to impact the torsional moment that produces.
Claims (2)
1. toggle type nose wheel steering mechanism is characterized in that:
Comprise that boxed rod (6), boxed rod (6) lower end that the upper end links to each other with pillar urceolus sleeve (4) by articulated manner link to each other with following toggle (9) upper end by articulated manner, following toggle (9) lower end links to each other with support piston bar lower adaptor (10) by articulated manner;
Also comprise the cross tube (2) that is fixed on the pillar urceolus (1), be fixed on boxed rod (6) lower end or the sheer pole (7) of toggle (9) upper end down, and two are installed on pressurized strut (5) between cross tube (3) and the sheer pole (7) by top connection (3), lower adaptor (8) respectively; The rotary freedom that all has both direction between above-mentioned pressurized strut (5) and cross tube (2) and the sheer pole (7);
Above-mentioned two pressurized struts (5) plane, place and boxed rod (6) be coplane not.
2. utilize the method for work of the described toggle type nose wheel steering mechanism of claim 1, it is characterized in that:
(a), handle Nose Wheel Steering: when aircraft floor slides, the maneuvering system signal for turn is received by mechanism, valve control system two pressurized struts of control (5) cooperate start, one side pressurized strut pushes away, one side pressurized strut is drawn, two pressurized strut length variations, toggle (9) and support piston bar lower adaptor (10) are rotated around piston rod together under driving, and promptly drive Nose Wheel Steering;
(b), front-wheel subtracts the pendulum function: when the ground taxi of aircraft high speed, the interior filling pressure of two pressurized struts (5), and by with two pressurized strut bonded assembly Hydraulic Elements subtract the pendulum damper hole, provide front-wheel to subtract pendulum damper, satisfy front-wheel and subtract the pendulum function;
(c), transfer torque function: when takeoff and landing, the locked pressurized strut of filling pressure in pressurized strut (5) chamber, make it can bear axial force, thereby make two piston barrels (5) and boxed rod (6) play the torsion pass effect jointly, transmit wheel (12) and be subjected to runway to impact the torsional moment that produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010207465 CN101870358B (en) | 2010-06-23 | 2010-06-23 | Toggle type nose wheel steering mechanism and work method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010207465 CN101870358B (en) | 2010-06-23 | 2010-06-23 | Toggle type nose wheel steering mechanism and work method |
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| CN101870358A true CN101870358A (en) | 2010-10-27 |
| CN101870358B CN101870358B (en) | 2012-12-26 |
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| CN 201010207465 Active CN101870358B (en) | 2010-06-23 | 2010-06-23 | Toggle type nose wheel steering mechanism and work method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923300A (en) * | 2012-10-31 | 2013-02-13 | 南京航空航天大学 | Electrically driven double-worm type turning system for front wheels of airplanes |
| CN102927076A (en) * | 2012-11-02 | 2013-02-13 | 西安飞机工业（集团）有限责任公司 | Counter-force type hydraulic drive mechanism |
| CN103523217A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Nose-wheel steering system of aircraft |
| CN103523209A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Retractable main landing frame for small aircrafts |
| CN103523212A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Nose landing gear of aircraft |
| CN105021414A (en) * | 2014-04-29 | 2015-11-04 | 中国飞机强度研究所 | Movable wing surface servo loading device |
| CN107651172A (en) * | 2017-08-23 | 2018-02-02 | 成都飞机工业（集团）有限责任公司 | A kind of aircraft nose wheel turning control system |
| CN107939896A (en) * | 2017-11-22 | 2018-04-20 | 中航飞机起落架有限责任公司 | A kind of band friction rotation stop subtracts the buffer unit of pendulum function |
| CN108216599A (en) * | 2017-12-14 | 2018-06-29 | 中国航空工业集团公司成都飞机设计研究所 | A kind of big nose wheel steering mechanism for manipulating angle of Double-linkage |
| CN109850132A (en) * | 2018-12-07 | 2019-06-07 | 中国航空工业集团公司成都飞机设计研究所 | A kind of detachable undercarriage contracting leg mechanism |
| CN110015409A (en) * | 2014-04-01 | 2019-07-16 | 空中客车英国运营有限责任公司 | The drive system of aircraft landing gear and its method engaged with rotating wheel |
| CN110667559A (en) * | 2019-08-26 | 2020-01-10 | 南京航空航天大学 | Ground steering device of air cushion type landing system and control method thereof |
| CN112061416A (en) * | 2020-09-21 | 2020-12-11 | 航大联合航空设备有限公司 | Aviation is system of marcing with pulling |
| CN112623198A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
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| US4265417A (en) * | 1979-02-26 | 1981-05-05 | The Boeing Company | Hydraulic nose landing gear steering actuator for an airplane |
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2010
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| US4265417A (en) * | 1979-02-26 | 1981-05-05 | The Boeing Company | Hydraulic nose landing gear steering actuator for an airplane |
| US20060278755A1 (en) * | 2004-01-20 | 2006-12-14 | Bachmeyer Paul J | Aircraft landing gear assembly shimmy damper |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523217A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Nose-wheel steering system of aircraft |
| CN103523209A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Retractable main landing frame for small aircrafts |
| CN103523212A (en) * | 2012-07-06 | 2014-01-22 | 哈尔滨飞机工业集团有限责任公司 | Nose landing gear of aircraft |
| CN102923300B (en) * | 2012-10-31 | 2015-08-12 | 南京航空航天大学 | Electric drive twin worm formula aircraft nose wheel turning system |
| CN102923300A (en) * | 2012-10-31 | 2013-02-13 | 南京航空航天大学 | Electrically driven double-worm type turning system for front wheels of airplanes |
| CN102927076A (en) * | 2012-11-02 | 2013-02-13 | 西安飞机工业（集团）有限责任公司 | Counter-force type hydraulic drive mechanism |
| CN110015409A (en) * | 2014-04-01 | 2019-07-16 | 空中客车英国运营有限责任公司 | The drive system of aircraft landing gear and its method engaged with rotating wheel |
| CN105021414A (en) * | 2014-04-29 | 2015-11-04 | 中国飞机强度研究所 | Movable wing surface servo loading device |
| CN107651172A (en) * | 2017-08-23 | 2018-02-02 | 成都飞机工业（集团）有限责任公司 | A kind of aircraft nose wheel turning control system |
| CN107939896A (en) * | 2017-11-22 | 2018-04-20 | 中航飞机起落架有限责任公司 | A kind of band friction rotation stop subtracts the buffer unit of pendulum function |
| CN108216599A (en) * | 2017-12-14 | 2018-06-29 | 中国航空工业集团公司成都飞机设计研究所 | A kind of big nose wheel steering mechanism for manipulating angle of Double-linkage |
| CN108216599B (en) * | 2017-12-14 | 2021-04-20 | 中国航空工业集团公司成都飞机设计研究所 | Front wheel turning mechanism with double linkage and large operation angle |
| CN109850132A (en) * | 2018-12-07 | 2019-06-07 | 中国航空工业集团公司成都飞机设计研究所 | A kind of detachable undercarriage contracting leg mechanism |
| CN110667559A (en) * | 2019-08-26 | 2020-01-10 | 南京航空航天大学 | Ground steering device of air cushion type landing system and control method thereof |
| CN112061416A (en) * | 2020-09-21 | 2020-12-11 | 航大联合航空设备有限公司 | Aviation is system of marcing with pulling |
| CN112623198A (en) * | 2020-12-29 | 2021-04-09 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
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| CN101870358B (en) | 2012-12-26 |
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