CN208344533U - A kind of undercarriage buffer dustproof construction - Google Patents
A kind of undercarriage buffer dustproof construction Download PDFInfo
- Publication number
- CN208344533U CN208344533U CN201820938278.7U CN201820938278U CN208344533U CN 208344533 U CN208344533 U CN 208344533U CN 201820938278 U CN201820938278 U CN 201820938278U CN 208344533 U CN208344533 U CN 208344533U
- Authority
- CN
- China
- Prior art keywords
- ring
- piston rod
- shaft sleeve
- lower shaft
- dustproof construction
- 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.)
- Active
Links
Landscapes
- Sealing Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The utility model discloses a kind of undercarriage buffer dustproof constructions, including Lower shaft sleeve, lower cover, piston rod, piston rod and Lower shaft sleeve clearance fit, dustband is equipped at Lower shaft sleeve and piston rod mating surface, it is provided with annular chamber on lower cover, at the mating surface of lower cover and piston rod, the supporting ring for being sleeved on piston rod outer wall is equipped in annular chamber, supporting ring includes ring body, surround the annular groove that ring body periphery opens up, gap is provided in ring body, supporting ring and piston rod are clearance fit；Be set in annular groove can the elastic ring that deformation occurs, the minimum diameter of elastic ring is greater than annular groove outer diameter；Being additionally provided with outside elastic ring can be by the cranse of elastic ring banding.The utility model completely eliminates undercarriage buffer rigid attachment in compression process in the prior art and scratches the gas leakage of sealing ring bring or oil leak situation, it ensure that airplane buffer sealing performance, and design of part is simple, processing, assembly, maintainability are fine.
Description
Technical field
The utility model belongs to aircraft landing gear structures design field, and in particular to a kind of dust-proof knot of undercarriage buffer
Structure.
Background technique
Undercarriage buffer is the important component of undercarriage, is mainly used for supporting aircraft, absorbs aircraft landing
Or the shock that is generated when ground taxi and bounce energy.Under normal circumstances, buffer dustproof construction is located at the lower end of Lower shaft sleeve
In card slot, it can prevent the external impurities such as floating dust from entering buffer, or removal piston rod surface attachment.Aircraft delays in flight
Rushing device is full extended state, in high-altitude cold wet or the adverse circumstances lower piston rod surfaces such as floating dust is more be easy to freeze or
There are other attachments.In aircraft landing, buffering piston bar stretches back and forth, and the cold ice of piston rod surface or hard attachment are main
It is removed by dustproof construction, if removal is not clean, the damage of buffer sealing ring easily is caused to leak by harder attachment
Oil or principal fault.
Traditional dustproof construction is as shown in Figure 1, include the Lower shaft sleeve 4 for being mounted on 5 inner cavity lower end of buffer outer cylinder, for inciting somebody to action
The lower cover 6 of 5 lower end of buffer outer cylinder capping is set in 4 inner cavity of Lower shaft sleeve and is pierced by the piston rod 3 of lower cover 6, piston rod 3
With 4 clearance fit of Lower shaft sleeve, dustband 1 and sealing ring 2 are equipped at Lower shaft sleeve 4 and 3 mating surface of piston rod.Piston rod 3 pushes up
Portion inner cavity is connected with plunger 7.
Dustband 1 generally selects nonmetallic materials, the hardness such as industrial felt, polytetrafluoroethylene (PTFE) softer.Dustband 1 is mounted on
In the annular groove of Lower shaft sleeve 4, outside floating dust is prevented to enter mainly by dustband 1, or attached by the removal piston rod surface of dustband 1
Object.Since dustband 1 as nonmetallic materials, it can only prevent floating dust, or removal 3 surface hardness of piston rod from comparing dustband
1 low attachment.If encounter than its attachment with high hardness, 3 surface attachments of piston rod just can not when buffer compresses
Removal, attachment will be compressed with piston rod 3 at this time.Since sealing ring 2 seals in buffer, cooperate with piston rod 3
Closely, the larger attachment of hardness is compressed with piston rod 3 at this time, and attachment enters and squeeze sealing ring 2, make the scuffing of sealing ring 2 or
Equivalent damage is cracked, and then leads to that oil leak or principal fault occurs.
Utility model content
In view of the above-mentioned problems, the utility model is intended to provide a kind of avoidable buffer damages sealing ring in use
Dustproof construction.
The technical solution that the utility model solves the problems, such as is: a kind of undercarriage buffer dustproof construction, including is mounted on slow
It rushes the Lower shaft sleeve of the outer tube inner chamber lower end of device, the lower cover for covering buffer outer cylinder lower end, be set in Lower shaft sleeve inner cavity simultaneously
It is pierced by the piston rod of lower cover, piston rod and Lower shaft sleeve clearance fit, dustband is equipped at Lower shaft sleeve and piston rod mating surface,
It is provided with annular chamber on lower cover, at the mating surface of lower cover and piston rod, is equipped in annular chamber and is sleeved on piston rod
The supporting ring of outer wall, the supporting ring include ring body, surround the annular groove that ring body periphery opens up, and are provided with gap, supporting ring in ring body
It is clearance fit with piston rod；
Be set in annular groove can the elastic ring that deformation occurs, the minimum diameter of elastic ring is greater than outside annular groove
Diameter；
Being additionally provided with outside elastic ring can be by the cranse of elastic ring banding.
In above scheme, additional designs are a set of below dustband thoroughly dedusting and to remove piston rod surface attachment
Device do not damage sealing ring so that piston rod does not bring impurity into sealing ring region in reciprocating motion to reach
Purpose.
The purpose of branch ring design gap is to enable elastic ring and spider to be assembled in annular groove.
Spider and elastic ring banding provide pretightning force on supporting ring, to supporting ring.
There is elastic ring small deformability can pass through elastic ring once the attachment of piston rod outer wall is scraped
Miniature deformation supporting ring distending is unlikely to that supporting ring card is bad, be also unlikely to prevent piston rod reciprocating motion.For not having
The attachment in place to go is then removed by the effect of Lower shaft sleeve.
Dustband is for preventing fine dust from entering buffer.
Further, the inner wall of the supporting ring is the conical surface, and supporting ring upper-end inner diameter is greater than supporting ring bottom diameter.The benefit of the conical surface
Be so that the lower end of supporting ring is as scoop, can the attachment to piston rod outer wall more smoothly remove.
Preferably, the elastic ring is positive polygonized structure, and all edges and corners of regular polygon are seamlessly transitted using circular arc,
The inscribed circle diameter of regular polygon is greater than annular groove outer diameter.
Regular polygon structure can make entire elastic ring have centainly small due to there is certain distortion allowance in edges and corners
Deformability.
Preferably, the supporting ring, elastic ring, cranse are metal material.Especially supporting ring, material hardness are higher than attached
Object.
Preferably, the gap is oblique gap.
Further, it is provided with annular slot in Lower shaft sleeve inner wall, the dustband is set in annular slot, and dustband
It is close to piston rod outer wall.
Further, equipped with sealing ring above dustband, at Lower shaft sleeve and piston rod mating surface.
The utility model completely eliminates undercarriage buffer rigid attachment in compression process in the prior art
The gas leakage of sealing ring bring or oil leak situation are scratched, damage will not be generated to buffer sealing ring, ensure that airplane buffer is close
Sealing property, and design of part is simple, processing, assembly, maintainability are fine.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 is prior art dustproof construction schematic diagram.
Fig. 2 is the utility model undercarriage buffer appearance diagram.
Fig. 3 is the utility model undercarriage buffer cross-sectional view.
The partial enlarged view that Fig. 4 is in Fig. 3 I.
Fig. 5 is the enlarged drawing of B in Fig. 4.
Fig. 6 is supporting ring structural schematic diagram.
Fig. 7 is the C-C view of Fig. 6.
Fig. 8 is elastic ring structure chart.
Fig. 9 is spider structure chart.
In figure: 1- dustband, 2- sealing ring, 3- piston rod, 4- Lower shaft sleeve, 5- buffer outer cylinder, 6- lower cover, 7- column
Plug, 8- annular chamber, 9- supporting ring, 10- elastic ring, 11- cranse, 91- ring body, 92- annular groove, 93- gap.
Specific embodiment
As shown in Fig. 2~9, a kind of undercarriage buffer dustproof construction, including being mounted on 5 inner cavity lower end of buffer outer cylinder
Lower shaft sleeve 4, the lower cover 6 for covering 5 lower end of buffer outer cylinder are set in 4 inner cavity of Lower shaft sleeve and are pierced by the work of lower cover 6
Stopper rod 3.Piston rod 3 and 4 clearance fit of Lower shaft sleeve.
Annular slot is provided in 4 inner wall of Lower shaft sleeve.Dustband 1 is set in annular slot, and outside dustband 1 and piston rod 3
Wall is close to.
Annular chamber 8 is provided on lower cover 6, at the mating surface of lower cover 6 and piston rod 3.It is equipped in annular chamber 8
It is sleeved on the supporting ring 9 of 3 outer wall of piston rod.
The supporting ring 9 includes ring body 91, surround the annular groove 92 that 91 periphery of ring body opens up.Gap is provided in ring body 91
93.The gap 93 is oblique gap.The inner wall of the supporting ring 9 is the conical surface, and 9 upper-end inner diameter of supporting ring is greater than 9 bottom diameter of supporting ring.Branch
Ring 9 and piston rod 3 are clearance fit.
Being set in annular groove 92 can the elastic ring 10 that deformation occurs.The elastic ring 10 is positive polygonized structure.
All edges and corners of regular polygon are seamlessly transitted using circular arc.The inscribed circle diameter of regular polygon is greater than 92 outer diameter of annular groove.
Being additionally provided with outside elastic ring 10 can be by the cranse 11 of 10 banding of elastic ring.
The supporting ring 9, elastic ring 10, cranse 11 are metal material.
Above dustband 1, it is located at Lower shaft sleeve 4 and 3 mating surface of piston rod equipped with sealing ring 2.
Aircraft undercarriage uses in the adverse circumstances such as high and cold, it is found that the dustproof construction using effect is preferable, to slow
Damage will not be generated by rushing device sealing ring, guaranteed airplane buffer sealing performance, illustrated that the utility model can satisfy design and evil
Requirement under bad environmental condition.
Claims (7)
1. a kind of undercarriage buffer dustproof construction, including being mounted on the Lower shaft sleeve (4) of buffer outer cylinder (5) inner cavity lower end, using
In the lower cover (6) for covering buffer outer cylinder (5) lower end, the piston for being set in Lower shaft sleeve (4) inner cavity and being pierced by lower cover (6)
Bar (3), piston rod (3) and Lower shaft sleeve (4) clearance fit are equipped with dustband at Lower shaft sleeve (4) and piston rod (3) mating surface
(1), it is characterised in that: annular chamber (8) are provided on lower cover (6), at the mating surface of lower cover (6) and piston rod (3),
The supporting ring (9) for being sleeved on piston rod (3) outer wall is equipped in annular chamber (8), the supporting ring (9) includes ring body (91), around ring
The annular groove (92) that body (91) periphery opens up is provided with gap (93) in ring body (91), between supporting ring (9) and piston rod (3) are
Gap cooperation；
Be set in the annular groove (92) can the elastic ring (10) that deformation occurs, the minimum diameter of elastic ring (10) is greater than annular
Groove (92) outer diameter；
Being additionally provided with outside elastic ring (10) can be by the cranse (11) of elastic ring (10) banding.
2. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: the inner wall of the supporting ring (9) is
The conical surface, supporting ring (9) upper-end inner diameter are greater than supporting ring (9) bottom diameter.
3. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: the elastic ring (10) is positive more
All edges and corners of side shape structure, regular polygon are seamlessly transitted using circular arc, and it is recessed that the inscribed circle diameter of regular polygon is greater than annular
Slot (92) outer diameter.
4. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: the supporting ring (9), elastic ring
(10), cranse (11) is metal material.
5. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: the gap (93) is tiltedly to slit
Mouthful.
6. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: in Lower shaft sleeve (4), inner wall is provided with
Annular slot, the dustband (1) are set in annular slot, and dustband (1) is close to piston rod (3) outer wall.
7. undercarriage buffer dustproof construction according to claim 1, it is characterised in that: above dustband (1), be located at
Sealing ring (2) are equipped at Lower shaft sleeve (4) and piston rod (3) mating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820938278.7U CN208344533U (en) | 2018-06-19 | 2018-06-19 | A kind of undercarriage buffer dustproof construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820938278.7U CN208344533U (en) | 2018-06-19 | 2018-06-19 | A kind of undercarriage buffer dustproof construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208344533U true CN208344533U (en) | 2019-01-08 |
Family
ID=64883773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820938278.7U Active CN208344533U (en) | 2018-06-19 | 2018-06-19 | A kind of undercarriage buffer dustproof construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208344533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793768A (en) * | 2021-02-04 | 2021-05-14 | 郑州航空工业管理学院 | Movable has buffer function's unmanned aerial vehicle undercarriage |
| CN114473481A (en) * | 2021-12-22 | 2022-05-13 | 湖北三江航天红峰控制有限公司 | O-shaped ring installation process passing through holes |
-
2018
- 2018-06-19 CN CN201820938278.7U patent/CN208344533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793768A (en) * | 2021-02-04 | 2021-05-14 | 郑州航空工业管理学院 | Movable has buffer function's unmanned aerial vehicle undercarriage |
| CN114473481A (en) * | 2021-12-22 | 2022-05-13 | 湖北三江航天红峰控制有限公司 | O-shaped ring installation process passing through holes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208344533U (en) | A kind of undercarriage buffer dustproof construction | |
| CN103939617B (en) | A kind of high-performance cavity type axle head air seal structure | |
| CN105570467A (en) | Sealing member of high-speed wire rolling mill | |
| CN208778617U (en) | A kind of ball nut dust guard | |
| CN204004514U (en) | A kind of self-cleaning type is to a point metal seal ball valve | |
| CN204186687U (en) | A kind of oil hydraulic cylinder with dust-proof cover | |
| CN205446526U (en) | Self -discharging formula protection type air spring | |
| CN206889559U (en) | A kind of adjustable section buffer of New type detachable | |
| CN204985490U (en) | Rubber dust sealing circle of many sealed clitellum | |
| CN207961291U (en) | The static bearing dustproof and waterproof structure of polishing machine | |
| CN203394911U (en) | Air intake valve block of pneumatic hydraulic station | |
| CN205533975U (en) | Shock absorber oil blanket structure | |
| CN204738879U (en) | Diesel engine safety cylinder | |
| CN206159487U (en) | Main cone buffer type oil blanket | |
| CN206190480U (en) | Multi -stage compressor frizing device | |
| CN109759988A (en) | A kind of plunger pump galand lifting tool | |
| CN208962999U (en) | A kind of dust-proof cover for car skeleton | |
| CN203248730U (en) | Electric tool sealing element | |
| CN214577459U (en) | Engine air cleaner conveyer pipe convenient to butt joint | |
| CN204985985U (en) | Bowl type stem seal subassembly structure with dustproof function | |
| CN204677879U (en) | A kind of one-way valve valve gap and valve rod flexible sealing structure | |
| CN211975576U (en) | Flat cylinder | |
| CN204357824U (en) | A kind of band X sealing configuration oil cylinder | |
| CN207343078U (en) | A kind of pneumatic spray application machine removes dead point mechanism | |
| CN210218895U (en) | Hard sealing semi-ball valve shaft column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |