CN107244412B - It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance - Google Patents
It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance Download PDFInfo
- Publication number
- CN107244412B CN107244412B CN201710439688.7A CN201710439688A CN107244412B CN 107244412 B CN107244412 B CN 107244412B CN 201710439688 A CN201710439688 A CN 201710439688A CN 107244412 B CN107244412 B CN 107244412B
- Authority
- CN
- China
- Prior art keywords
- main
- undercarriage
- elasticity
- main reed
- spring piece
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
- B64C25/62—Spring shock-absorbers; Springs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Springs (AREA)
Abstract
The present invention proposes a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance, is made of main reed and auxiliary spring piece；Block is respectively provided on the upside of the two-arm of main elasticity of spring leaf direction；Secondary elasticity of spring leaf direction both ends have the hollow fastener turned over；Auxiliary spring piece is on the downside of main reed, and the hollow fastener at secondary elasticity of spring leaf direction both ends covers in the two-arm of main elasticity of spring leaf direction, and is in the outside of side block blocks in the two-arm of main elasticity of spring leaf direction；When the hollow fastener of auxiliary spring piece covers in the two-arm of main elasticity of spring leaf direction, and main reed and auxiliary spring piece are in free state, there is gap between the hollow fastener of auxiliary spring piece and ipsilateral main reed block.Using undercarriage of the invention when bearing lower impact energy, only main reed is deformed, and is deformed two reeds all by being mechanically connected fit structure when bearing compared with HI high impact energy, thus can effectively be reduced the load peaks of undercarriage.
Description
Technical field
The present invention designs unmanned plane landing gear structure technical field, specially a kind of for promoting UAV Landing resiliency
The undercarriage plate spring structure of energy.
Background technique
For unmanned plane in flight, undercarriage is not involved in the flight load for bearing full machine, but in the take-off and landing of most critical
The safety in the two stages, especially landing period, unmanned plane carrys out effective buffering energy-absorbing mainly by undercarriage.Buffer is modern
The universal component of unmanned plane undercarriage indispensability, function are the kinetic energy during absorbing UAV Landing and sliding, buffering energy-absorbing
Ability the overload for acting on unmanned plane structure should be made to be reduced to a certain tolerable injury level.Unmanned plane is low etc. with light weight, speed
Feature, undercarriage is generally non-retractable, since leaf spring buffer has structure simple, the features such as high reliablity, maintainability is good,
Thus it is widely used on the undercarriage of unmanned plane, this undercarriage is referred to as leaf spring undercarriage.
Existing unmanned plane uses buffer of traditional plate spring structure as undercarriage.Traditional plate spring structure is all
Reed is all clamped with U bolt or only one reed, as shown in Figure 1, at work, leaf spring can integrally deform simultaneously, i.e.,
Make to apply lesser kinetic energy, can also generate higher active force, if applied on unmanned plane undercarriage, unmanned plane can be made to bear
Biggish overload.It often bears biggish overload and damage is had to unmanned plane, in order to which the overload for bearing unmanned plane reduces, need
Leaf spring has better cushion performance, i.e. leaf spring generates lower active force when bearing identical impact energy.
Summary of the invention
Unmanned plane undercarriage in most of landing is solely subjected to lower kinetic energy (lesser quality/lower speed
Degree), and often generate it is biggish overload be harmful to unmanned plane, therefore at this time more desirable undercarriage fuselage is only generated it is lower
Active force.At work due to traditional plate spring structure, leaf spring can integrally deform simultaneously, even if applying lesser impact energy
Amount, leaf spring can also generate higher active force.For this problem, the present invention proposes a kind of for promoting UAV Landing resiliency
The undercarriage plate spring structure of energy, can prevent all reeds in the case where applying lower kinetic energy while deform, and the present invention proposes
Undercarriage plate spring structure have one by one (step by step) reaction deformation ability, to be produced in the case where applying lower kinetic energy
Raw lesser reaction force.
The technical solution of the present invention is as follows:
It is described a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance, there is main reed, the master
It can be connect with unmanned aerial vehicle body in the middle part of reed, main elasticity of spring leaf direction both ends can be connect with unmanned plane gear tyre；Its
It is characterized in that: being respectively provided with block on the upside of the main elasticity of spring leaf direction two-arm；The undercarriage plate spring structure also has auxiliary spring
Piece, the pair elasticity of spring leaf direction both ends have the hollow fastener turned over；The auxiliary spring piece is on the downside of main reed, and auxiliary spring piece
The hollow fastener at elastic direction both ends covers in the two-arm of main elasticity of spring leaf direction, and is on the upside of the two-arm of main elasticity of spring leaf direction
The outside of block；When the hollow fastener of auxiliary spring piece covers in the two-arm of main elasticity of spring leaf direction, and main reed and auxiliary spring piece be in from
When by state, there is gap between the hollow fastener of auxiliary spring piece and ipsilateral main reed block.
Further preferred embodiment, it is described a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance,
It is characterized by: the gap energy when main reed stress is unfolded outward, between the hollow fastener of auxiliary spring piece and ipsilateral main reed block
Enough become smaller until the hollow fastener of auxiliary spring piece is contacted with ipsilateral main reed block；When the hollow fastener of auxiliary spring piece and ipsilateral main reed block
After contact, auxiliary spring piece and the common stress of main reed.
Beneficial effect
In most cases unmanned plane land when, undercarriage be solely subjected to lower impact energy (lesser quality/compared with
Low speed), in this case, in order to reduce the overload of unmanned plane receiving, it is undesirable to which undercarriage generates biggish load.This
The novel plate spring structure that invention proposes solves this problem using novel mechanical connection fit structure.Undercarriage is being born
When lower impact energy, only main reed is deformed, and passes through mechanical connection fit structure when bearing compared with HI high impact energy
It is deformed two reeds all, thus can effectively reduce the load peaks of undercarriage.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1: traditional plate spring structure schematic diagram；(a) all reeds are clamped by U bolt；(b) single reed structure.
Fig. 2: the schematic layout pattern of substep energy absorption leaf spring；(a) exploded view；(b) installation diagram；
Fig. 3: mechanical connection fit structure schematic diagram；
Fig. 4: mechanical connection fit structure partial enlarged view；
Fig. 5: the decomposition diagram of substep energy absorption leaf spring in embodiment；
Fig. 6: the installation diagram of substep energy absorption leaf spring in embodiment；
Fig. 7: three kinds of comparative structure schematic diagrams in embodiment；
When Fig. 8: Vo=0.5m/s, the vertical displacement time history of three kinds of comparison structures；
When Fig. 9: Vo=3m/s, the vertical displacement time history of three kinds of comparison structures；
When Figure 10: Vo=0.5m/s, the vertical load history of three kinds of comparison structures；
When Figure 11: Vo=3m/s, the vertical load history of three kinds of comparison structures..
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
As shown in Fig. 2, the undercarriage leaf spring in the present embodiment is substep energy absorption leaf spring, structure is divided into two parts: main
The auxiliary spring piece of reed and substep energy absorption.It can be connect with unmanned aerial vehicle body in the middle part of the main reed, main elasticity of spring leaf side
It can be connect to both ends with unmanned plane gear tyre.As shown in figure 3, being respectively provided on the upside of the main elasticity of spring leaf direction two-arm
Block, the pair elasticity of spring leaf direction both ends have the hollow fastener turned over.Main reed and auxiliary spring timing on chip, the auxiliary spring piece
On the downside of main reed, and the hollow fastener at secondary elasticity of spring leaf direction both ends covers in the two-arm of main elasticity of spring leaf direction, and locates
In the outside of side block blocks in the two-arm of main elasticity of spring leaf direction；The hollow fastener at auxiliary spring piece both ends and the block of main reed two sides composition
Substep energy absorption bindiny mechanism.
As shown in figure 3, when the hollow fastener of auxiliary spring piece covers in the two-arm of main elasticity of spring leaf direction, and main reed and auxiliary spring piece are equal
In a free state, there is gap between the hollow fastener of auxiliary spring piece and ipsilateral main reed block, have between hollow fastener and block
Certain gap can be such that fastener slides in certain range.Auxiliary spring piece is linked on main reed by fastener, and block plays limitation card
The function of part motion range.When deformation is unfolded in main reed stress outward, the hollow fastener of auxiliary spring piece and ipsilateral main reed block it
Between gap can become smaller until the hollow fastener of auxiliary spring piece contacted with ipsilateral main reed block；When the hollow fastener of auxiliary spring piece with it is ipsilateral
After main reed block contact, auxiliary spring piece and the common stress of main reed, auxiliary spring piece is together with main reed common eigenvector.
The present invention is deformed by main reed and the clamping lock function of hollow fastener and block realizes two step deformation stages:
First stage is main reed deformation, if the impact energy applied to Landing Gear System is not enough to main reed
Being deformed to makes fastener contact blocks, then only main reed deformation；
Second stage is that main reed and substep energy absorption reed (auxiliary spring piece) all deform, if applied to Landing Gear System
The impact energy added is enough to make main reed to generate enough deformations to make hollow fastener slip over gap-contact to block, then main spring
Piece and substep energy absorption reed all deform, i.e. leaf spring system overall deformation.
The present embodiment selects a frame unmanned plane to carry out experimental study.Unmanned plane quality is 300kg, and undercarriage is fixed straight panel
Type, size is as shown in Figure 5 and Figure 6, and material uses 7075-T6 aluminium alloy, density 2810kg/m3, Young's modulus is
71.7GPa, stretching yield stress 503MPa, ultimate tensile stress 572MPa, Poisson's ratio 0.33.Construct finite element mould
Type carries out emulation comparison to three kinds of systems: 1) only main reed, such as Fig. 7 (a)；(2) Novel leaf spring proposed by the present invention, that is, substep energy
Amount absorbs leaf spring, such as Fig. 7 (b)；3) quality and the identical equivalent leaf spring of Novel leaf spring are traditional leaf spring, such as Fig. 7 (c).
Comparative studies load peaks and dominant bit of undercarriage in the case where initial velocity is respectively 0.5m/s, 3m/s
It moves.Wherein Fig. 8,9 are shown in 0.5m/s and 3m/s, the displacement-time curve on unmanned plane undercarriage.Figure 10,11
It shows in 0.5m/s and 3m/s, load-time graph on unmanned plane undercarriage.
If Fig. 8 and Fig. 9 are shown, only have the leaf spring undercarriage and substep energy absorption plate of main reed in the case where 0.5m/s
The shift value of spring undercarriage is closer；Substep energy absorption leaf spring undercarriage and equivalent leaf spring undercarriage in the case where 3m/s
Shift value is closer.0.5m/s rush speed under, undercarriage bear impact energy it is smaller, substep energy absorption leaf spring rises and falls
Mainly main reed deformation is buffered in frame to absorb kinetic energy, therefore the displacement of the undercarriage of its shift value and only main reed
It is worth closer；Under the impact velocity of 3m/s, the impact energy that undercarriage is born is larger, in substep energy absorption leaf spring undercarriage
Main reed and auxiliary spring piece are all deformed to absorb kinetic energy and buffered, therefore the displacement of its shift value and equivalent leaf spring undercarriage
It is worth closer.
If Figure 10 and Figure 11 are shown, in the case where 0.5m/s, the leaf spring undercarriage and substep energy of only main reed are inhaled
The load peaks for receiving leaf spring undercarriage are closer, in the case where 3m/s, substep energy absorption leaf spring undercarriage and equivalent leaf spring
The load peaks of undercarriage are closer.Also, in the case where 0.5m/s, the load of substep energy absorption leaf spring undercarriage generation
Peak value (10416kN) reduces 40.92% compared with the load peaks (14678kN) of equivalent leaf spring undercarriage.0.5m/s's
It rushes under speed, the impact energy that undercarriage is born is smaller, is mainly that main reed deformation comes in substep energy absorption leaf spring undercarriage
It absorbs kinetic energy to be buffered, therefore the load that the undercarriage of its load and only main reed that generate generates is closer, load peak
It is worth also closer；Under the impact velocity of 3m/s, the impact energy that undercarriage is born is larger, substep energy absorption leaf spring undercarriage
Middle main reed and auxiliary spring piece are all deformed to absorb kinetic energy and buffered, therefore the load generated and equivalent leaf spring undercarriage produce
Raw load is closer, and load peaks are also closer.Also, under the impact velocity of 0.5m/s, due to substep energy absorption plate
Spring undercarriage is bigger than the displacement stroke of equivalent leaf spring undercarriage, and reaches the maximum displacement stroke time experienced than equivalent leaf spring
It is long that undercarriage reaches the maximum displacement stroke time experienced, therefore when bearing same impact, substep energy absorption leaf spring
The load peaks of undercarriage are smaller than the load peaks of equivalent leaf spring undercarriage.
Equivalent leaf spring undercarriage is traditional leaf spring undercarriage in experiment.It can be seen from the experiment that substep energy proposed by the present invention
When absorbing leaf spring and meeting unmanned plane and bear lower impact energy in most of land, the load of undercarriage is more traditional
The load of leaf spring undercarriage wants small.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (2)
1. a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance, there is main reed, in the main reed
Portion can be connect with unmanned aerial vehicle body, and main elasticity of spring leaf direction both ends can be connect with unmanned plane gear tyre；Its feature exists
In: block is respectively provided on the upside of the main elasticity of spring leaf direction two-arm；The undercarriage plate spring structure also has auxiliary spring piece, described
Secondary elasticity of spring leaf direction both ends have the hollow fastener turned over；The auxiliary spring piece is on the downside of main reed, and secondary elasticity of spring leaf side
It is covered in the two-arm of main elasticity of spring leaf direction to the hollow fastener at both ends, and is in side block blocks in the two-arm of main elasticity of spring leaf direction
Outside；When the hollow fastener of auxiliary spring piece covers in the two-arm of main elasticity of spring leaf direction, and main reed and auxiliary spring piece are in free state
When, there is gap between the hollow fastener of auxiliary spring piece and ipsilateral main reed block.
2. a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance, feature according to claim 1
Be: when main reed stress is unfolded outward, the gap between the hollow fastener of auxiliary spring piece and ipsilateral main reed block can become smaller
Until the hollow fastener of auxiliary spring piece is contacted with ipsilateral main reed block；When the hollow fastener of auxiliary spring piece is contacted with ipsilateral main reed block
Afterwards, auxiliary spring piece and the common stress of main reed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439688.7A CN107244412B (en) | 2017-06-12 | 2017-06-12 | It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439688.7A CN107244412B (en) | 2017-06-12 | 2017-06-12 | It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107244412A CN107244412A (en) | 2017-10-13 |
| CN107244412B true CN107244412B (en) | 2019-06-04 |
Family
ID=60018194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439688.7A Expired - Fee Related CN107244412B (en) | 2017-06-12 | 2017-06-12 | It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107244412B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108516079A (en) * | 2018-04-18 | 2018-09-11 | 佛山论剑科技有限公司 | A kind of unmanned plane buffering undercarriage |
| CN108930743A (en) * | 2018-08-29 | 2018-12-04 | 沈阳航空航天大学 | The double arches overlapping variation rigidity leaf spring and production method being staggered using the perpendicular paving of horizontal paving |
| CN111645853A (en) * | 2020-06-08 | 2020-09-11 | 中航飞机起落架有限责任公司 | Aircraft undercarriage |
| CN112478144B (en) * | 2020-12-04 | 2022-11-11 | 西北工业大学 | Flexible undercarriage damping device |
| CN113428348A (en) * | 2021-07-16 | 2021-09-24 | 中国科学院国家空间科学中心 | Unmanned aerial vehicle undercarriage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2364165A1 (en) * | 1976-09-08 | 1978-04-07 | Wassmer Aviat Ste Nle | Undercarriage component for a light aircraft - comprises an arched spring blade with wheel(s) fitted inside the curve |
| US4852829A (en) * | 1987-09-14 | 1989-08-01 | Marvin Garfinkle | Undercarriage apparatus for vertical-lift aircraft |
| RU2123961C1 (en) * | 1997-01-29 | 1998-12-27 | Открытое акционерное общество "Авиационный комплекс им.С.В.Ильюшина" | Aircraft nose undercarriage leg |
| KR20100066244A (en) * | 2008-12-08 | 2010-06-17 | 정만희 | The equipment that eliminates rolling of car |
| CN203486136U (en) * | 2013-07-20 | 2014-03-19 | 中国特种飞行器研究所 | Variable cross-section spring steel plate type landing gear |
| CN204278970U (en) * | 2014-11-18 | 2015-04-22 | 郑州日产汽车有限公司 | The few plate spring of CDV car variation rigidity |
| CN104696403A (en) * | 2015-01-06 | 2015-06-10 | 成都客车股份有限公司 | Composite spring structure realizing equal offset frequency of variable stiffness |
-
2017
- 2017-06-12 CN CN201710439688.7A patent/CN107244412B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2364165A1 (en) * | 1976-09-08 | 1978-04-07 | Wassmer Aviat Ste Nle | Undercarriage component for a light aircraft - comprises an arched spring blade with wheel(s) fitted inside the curve |
| US4852829A (en) * | 1987-09-14 | 1989-08-01 | Marvin Garfinkle | Undercarriage apparatus for vertical-lift aircraft |
| RU2123961C1 (en) * | 1997-01-29 | 1998-12-27 | Открытое акционерное общество "Авиационный комплекс им.С.В.Ильюшина" | Aircraft nose undercarriage leg |
| KR20100066244A (en) * | 2008-12-08 | 2010-06-17 | 정만희 | The equipment that eliminates rolling of car |
| CN203486136U (en) * | 2013-07-20 | 2014-03-19 | 中国特种飞行器研究所 | Variable cross-section spring steel plate type landing gear |
| CN204278970U (en) * | 2014-11-18 | 2015-04-22 | 郑州日产汽车有限公司 | The few plate spring of CDV car variation rigidity |
| CN104696403A (en) * | 2015-01-06 | 2015-06-10 | 成都客车股份有限公司 | Composite spring structure realizing equal offset frequency of variable stiffness |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107244412A (en) | 2017-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107244412B (en) | It is a kind of for promoting the undercarriage plate spring structure of UAV Landing cushion performance | |
| JP5484481B2 (en) | Vehicle collision energy absorber having multiple collision energy absorption stages | |
| CN102205822A (en) | Energy-absorbing type car bumper | |
| CN110481477A (en) | Endergonic structure and vehicle with it | |
| CN109969112B (en) | Anti-collision beam for automobile | |
| CN212423035U (en) | A buffering anticollision subassembly for electric automobile | |
| CN215851097U (en) | Passive buffer stop of car with buffer structure | |
| CN109823296A (en) | A kind of automobile collision protection device | |
| CN212802738U (en) | Anticollision type public security sentry box | |
| KR101143078B1 (en) | Crash energy absorber absorbing crash energy by stages | |
| CN213594489U (en) | Unmanned ship anticollision mechanism for lamplight show | |
| CN214189573U (en) | Automobile bumper | |
| JPH10252793A (en) | Hollow spring | |
| CN211893120U (en) | Energy absorption assembly and automobile | |
| CN101832353A (en) | Composite air cushion type air cylinder buffering energy absorber | |
| CN203666571U (en) | Automobile door collision prevention device | |
| KR101784575B1 (en) | a buffer for railway cars | |
| CN206528438U (en) | A kind of automobile rear bumper | |
| JP5519333B2 (en) | Railcar shock absorber | |
| CN215204769U (en) | Vehicle energy absorption device | |
| CN216834295U (en) | Fixed-shape surface turnover type energy absorption sheet and fixing device thereof | |
| JPS63195062A (en) | Buffer device for railway rolling stock | |
| CN215857203U (en) | Bridge protection device and bridge structure | |
| CN219257264U (en) | High-strength protective bumper | |
| CN215451634U (en) | Sideslip formula anticollision battery package, battery package mounting structure and vehicle of vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 Termination date: 20210612 |