CN103523210A - Friction shimmy damping device of nose landing gear - Google Patents
Friction shimmy damping device of nose landing gear Download PDFInfo
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- CN103523210A CN103523210A CN201210232945.7A CN201210232945A CN103523210A CN 103523210 A CN103523210 A CN 103523210A CN 201210232945 A CN201210232945 A CN 201210232945A CN 103523210 A CN103523210 A CN 103523210A
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- friction
- damping device
- shimmy damping
- nuts
- rotating cylinder
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Abstract
The invention relates to the field of machinery and provides a friction shimmy damping device of a nose landing gear. According to the friction shimmy damping device, a machine wheel is mounted on a machine wheel shaft of a rocker arm; the upper end of the rocker arm is connected with the lower end of an anti-twisting arm by a shaft; a middle connection point of the rocker arm is connected with an inner barrel by a shaft; the upper end of the anti-twisting arm is connected with a rotary barrel by a shaft; a lower friction sheet is mounted at the upper end of an outer barrel and is fixed in the peripheral direction by a bolt; the rotary barrel is arranged in the outer barrel and the upper part of the rotary barrel is fixed by two nuts; a stop washer is arranged between the two nuts; a tenon of an upper friction sheet is embedded into a clamping groove of the rotary barrel and is fixed in the peripheral direction; a washer is arranged between the upper friction sheet on the rotary barrel and the nuts; the lower surface of the upper friction sheet is in face contact with the upper surface of the lower friction sheet. According to the friction shimmy damping device of the nose landing gear, a pure mechanical structure form and an unpowered source piece design are adopted so as to effectively transmit a ground load to the friction shimmy damping device, a shimmy damping force is increased when a bearing pressure is increased and the shimmy damping of the nose landing gear is realized to the greatest extent.
Description
Technical field
The present invention relates to mechanical field, relate in particular to a kind of nose-gear friction shimmy damping device.
Background technology
Existing friction shimmy damping device mainly relies on the propulsion source parts such as contained spring to provide to subtract pendulum frictional damping, and the mutual motion by friction pair, subtracts pendulum thereby realize nose-gear.This technology is owing to having propulsion source parts, inner structure relative complex, and weight is larger.And friction pair is long-term to be used easy to wearly, and Inspection and maintenance is inconvenient, and the excessive need that wear and tear are scrapped replacing, check not in placely, there is potential shimmy possibility.
Summary of the invention
The technical problem to be solved in the present invention: a kind of nose-gear friction shimmy damping device is provided, simple in structure lightweight.
Technical scheme of the present invention: a kind of nose-gear friction shimmy damping device, wheel is arranged on the wheel axle of rocking arm, the upper end of rocking arm with prevent that turning round arm lower end is connected by axle, the middle part point of connection of rocking arm is connected by axle with inner core; Prevent that turning round arm upper end is connected by axle with rotating cylinder; Lower friction lining is arranged on urceolus upper end, circumferentially fixing by bolt; Rotating cylinder is in urceolus, and top is fixed by 2 nuts, and stop washer is arranged between two nuts; It is interior circumferentially fixing that the tenon of upper friction plate is embedded in the draw-in groove of rotating cylinder; Packing ring is contained between the upper friction plate and nut on rotating cylinder, and upper friction plate lower surface contacts with lower friction lining upper surface face.
Beneficial effect of the present invention: the present invention adopts the purest mechanical structure form, the design of passive delivery part, is effectively delivered to landing load in friction shimmy damping device, and damping force increases along with the increase of bearing pressure, realizes to greatest extent nose-gear and subtracts pendulum.
Accompanying drawing explanation
Fig. 1 is nose-gear structural representation of the present invention.
Fig. 2 is friction gear detail drawing of the present invention.
Fig. 3 is friction lining under the present invention.
Fig. 4 is upper friction plate of the present invention.
Fig. 5 is rotating cylinder of the present invention.
The specific embodiment
Nose-gear of the present invention friction shimmy damping device technical conceive is: when nose-gear is subject to the load from ground, version can be transmitted to load on friction gear, and the positive pressure of friction means extruding is provided, and this positive pressure increases along with the increase of load.In friction gear, should have one or several parts to be synchronized with the movement along with wheel shimmy, another or several parts should keep fixing simultaneously, make to exist and relatively rotate between its device friction means.Friction gear, under the effect of positive pressure, has friction force output all the time, and when nose-gear occurs when shimmy, friction force does work repeatedly, thereby consume, subtracts pendulum energy, thereby realize nose-gear, subtracts pendulum.
Friction subtracts pendulum parts the selection of material should have wear-resisting attribute, can be because short-term uses serious wear.
Below in conjunction with drawings and Examples, the present invention is explained as follows:
Referring to Fig. 1 to Fig. 5, this nose-gear friction shimmy damping device comprises wheel 1, and rocking arm 2, prevents turning round arm 3, rotating cylinder 4, urceolus 5, lower friction lining 6, upper friction plate 7, packing ring 8, nut 9, stop washer 10, bolt 11, inner core 12.Wheel 1 is arranged on the wheel axle of rocking arm 2, and the upper end of rocking arm 2 is turned round arm 3 lower ends and is connected by axle with anti-, and the middle part point of connection of rocking arm 2 is connected by axle with inner core 12; Prevent that turning round arm 3 upper ends is connected by axle with rotating cylinder 4; Lower friction lining 6 is arranged on urceolus 5 upper ends, circumferentially fixing by bolt 11; Rotating cylinder 4 is in urceolus 5, and top is fixing by 2 nuts 9, and stop washer 10 is arranged between two nuts 9, locking for nut 9.It is interior circumferentially fixing that the tenon of upper friction plate 7 is embedded in the draw-in groove of rotating cylinder 4; Packing ring 8 is contained between the upper friction plate and nut 9 on rotating cylinder 4, and upper friction plate 7 lower surfaces contact with lower friction lining 6 upper surface faces.
Friction of the present invention subtracts pendulum principle: when nose-gear wheel 1 is subject to the load F from ground; rocking arm 2 and inner core 12 intersection point C upward movements; rocking arm 2 is turned round arm 3 intersection point A and moved downward with anti-; the anti-arm 3 of turning round moves downward with rotating cylinder 4 intersection points B; thus drive nut 9 to move downward; upper friction plate 6, lower friction lining 7 are compressed, to friction means, provide corresponding positive pressure.Wheel 1, rocking arm 2, the anti-arm 3, rotating cylinder 4, upper friction plate 7, nut 9, stop washer 10 turned round are rotatable parts; And urceolus 5, bolt 11, lower friction lining 6 are fixed parts.When nose-gear occurs when shimmy, in relative rotation can be because extrusion friction power is done work repeatedly between upper friction plate and fixed lower friction lining, and make shimmy energy change frictional heat energy into and consume, realize nose-gear and subtract pendulum.
The positive pressure that friction subtracts pendulum comes from nut 9.2 nuts 9 lock by stop washer 10 after tightening, and wherein stop washer 10 is circumferentially fixing by keyway with rotating cylinder 4, that is:, when move in rotating cylinder upper and lower, left and right, 2 nuts 9 are servo-actuated.When wheel holds 1 while being subject to load, rotating cylinder 4 is by drop-down, and nut 9 compresses upper friction plates 7, lower friction lining 6.Wheel 1 load is larger, and the upper friction plate 7 that nut 9 provides, the positive pressure of lower friction lining 6 are larger.
Friction of the present invention subtracts pendulum and mainly by upper friction plate 7 and lower friction lining 6, circumferentially relatively rotates realization, and its connection mode is: upper friction plate 7 is embedded in by tenon in the groove of rotating cylinder 4, with the circumferential rotational synchronization of rotating cylinder 4; Lower friction lining is fixed on urceolus 5 by 6 bolts 11, together maintains static with urceolus 5.Between upper and lower friction lining, adjust to after reasonable clearance, fixing by pad 8 and 2 nuts 9, fixing locking by locking plate 10 between nut 9.
Friction gear of the present invention adopts Special wear-resistant material, and upper friction plate 7 is wear-resisting copper material; Lower friction lining 6 bodies are not wear-resisting steel material, but its surface binded AIRFLON self-lubricating bed course.This self-lubricating bed course stable friction performance, spillage of material is low, and fatigue life is long, can meet the long-term use of product.
Effect of the present invention is: 1) a kind of pendulum mode that subtracts without direct driving force source is provided; 2) reduce large structural weight loss; 3) relatively little installing space; 4) manufacture, assembly technology is simple; 5) working service is convenient, cost is low; 6) safety, reliability are high.
Claims (1)
1. a nose-gear friction shimmy damping device, is characterized in that, wheel is arranged on the wheel axle of rocking arm, the upper end of rocking arm with prevent that turning round arm lower end is connected by axle, the middle part point of connection of rocking arm is connected by axle with inner core; Prevent that turning round arm upper end is connected by axle with rotating cylinder; Lower friction lining is arranged on urceolus upper end, circumferentially fixing by bolt; Rotating cylinder is in urceolus, and top is fixed by 2 nuts, and stop washer is arranged between two nuts; It is interior circumferentially fixing that the tenon of upper friction plate is embedded in the draw-in groove of rotating cylinder; Packing ring is contained between the upper friction plate and nut on rotating cylinder, and upper friction plate lower surface contacts with lower friction lining upper surface face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232945.7A CN103523210A (en) | 2012-07-06 | 2012-07-06 | Friction shimmy damping device of nose landing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232945.7A CN103523210A (en) | 2012-07-06 | 2012-07-06 | Friction shimmy damping device of nose landing gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103523210A true CN103523210A (en) | 2014-01-22 |
Family
ID=49925660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210232945.7A Pending CN103523210A (en) | 2012-07-06 | 2012-07-06 | Friction shimmy damping device of nose landing gear |
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| Country | Link |
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| CN (1) | CN103523210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628301A (en) * | 2014-10-28 | 2016-06-01 | 哈尔滨飞机工业集团有限责任公司 | Fixed anti-torque arm |
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3188023A (en) * | 1960-09-17 | 1965-06-08 | Dowty Technical Dev Ltd | Wheel mountings for aircraft undercarriages or other vehicles |
| US4199119A (en) * | 1977-06-10 | 1980-04-22 | Messier-Hispano-Bugatti | Wing mounted retractable aircraft undercarriages |
| US4749152A (en) * | 1986-05-13 | 1988-06-07 | Messier-Hispano-Bugatti | Aircraft undercarriage of tilting-beam type and of reduced bulk |
| US4892270A (en) * | 1987-06-09 | 1990-01-09 | Messier-Haspano-Bugatti | Rocking beam landing gear |
| CN101821162A (en) * | 2007-10-09 | 2010-09-01 | 梅西耶-道提有限公司 | Load detection in an aircraft landing gear |
| GB2470499A (en) * | 2005-08-04 | 2010-11-24 | Messier Dowty Ltd | Landing gear |
| CN202054141U (en) * | 2011-04-21 | 2011-11-30 | 南京航空航天大学 | Extending parallel buffer-rocker arm type undercarriage |
-
2012
- 2012-07-06 CN CN201210232945.7A patent/CN103523210A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3188023A (en) * | 1960-09-17 | 1965-06-08 | Dowty Technical Dev Ltd | Wheel mountings for aircraft undercarriages or other vehicles |
| US4199119A (en) * | 1977-06-10 | 1980-04-22 | Messier-Hispano-Bugatti | Wing mounted retractable aircraft undercarriages |
| US4749152A (en) * | 1986-05-13 | 1988-06-07 | Messier-Hispano-Bugatti | Aircraft undercarriage of tilting-beam type and of reduced bulk |
| US4892270A (en) * | 1987-06-09 | 1990-01-09 | Messier-Haspano-Bugatti | Rocking beam landing gear |
| GB2470499A (en) * | 2005-08-04 | 2010-11-24 | Messier Dowty Ltd | Landing gear |
| CN101821162A (en) * | 2007-10-09 | 2010-09-01 | 梅西耶-道提有限公司 | Load detection in an aircraft landing gear |
| CN202054141U (en) * | 2011-04-21 | 2011-11-30 | 南京航空航天大学 | Extending parallel buffer-rocker arm type undercarriage |
Non-Patent Citations (1)
| Title |
|---|
| 王维贤: "《直八运输型直升机设计、试验技术攻关》", 《直升机技术》, no. 101, 31 March 1995 (1995-03-31), pages 7 - 16 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628301A (en) * | 2014-10-28 | 2016-06-01 | 哈尔滨飞机工业集团有限责任公司 | Fixed anti-torque arm |
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140122 |