CN202991995U - Valve and piston ring combined part of landing gear buffer - Google Patents
Valve and piston ring combined part of landing gear buffer Download PDFInfo
- Publication number
- CN202991995U CN202991995U CN 201220679552 CN201220679552U CN202991995U CN 202991995 U CN202991995 U CN 202991995U CN 201220679552 CN201220679552 CN 201220679552 CN 201220679552 U CN201220679552 U CN 201220679552U CN 202991995 U CN202991995 U CN 202991995U
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- valve
- piston ring
- nut
- combined part
- buffer
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Abstract
The utility model belongs to the field of structural design of landing gears, and particularly relates to a valve and piston ring combined part of a landing gear buffer. The combined part comprises a valve and a piston ring, wherein the outer part of the valve integrally adopts a stepped shaft structure with a larger end and a smaller end; a nut is sheathed outside the smaller end of the valve; a clamping groove is formed between the larger end of the valve and the nut; and the piston ring is sheathed in the clamping groove. The integral structure of the combined part completely eliminates the deformation and damage caused in the assembly process of the piston ring in the prior art, and the assembly process is simple and easy to operate; and the actual use test shows that a certain type of landing gear buffer is equipped with the valve and piston ring combined part, the equipping process is simple, the buffer is overhauled after the durable drop test is finished, and when the structure is intact, the combined part can meet the design and use requirements.
Description
Technical field
The utility model belongs to undercarriage structural design field, specifically, discloses a kind of undercarriage buffer valve piston ring assembly parts.
Background technique
Undercarriage buffer is the important component part of undercarriage, and can buffer work, and directly affects aircraft landing safety.In buffer, piston ring is a very important structure, generally be positioned at positive stroke valve outer rim draw-in groove, can regulate on the one hand the coaxality of buffer valve and piston rod inwall in compression process, can also stop on the other hand piston rod cavity of resorption hydraulic oil to enter epicoele along the valve outer rim.
The piston ring material is generally selected the higher and wear-resisting materials of hardness such as the pig iron, spring steel, and fragility is larger.Traditional valve and piston ring assembling unit structure are as shown in Figure 1, wherein valve 1 is an overall structure, when assembling, need guide increase piston ring 2 swell openings by special device, cross the valve end, enter the valve draw-in groove, distortion when increase piston ring opening has just increased the piston ring assembling, because the piston ring material fragility is larger, piston ring distortion excessive in assembly process easily causes the piston ring fracture, and scrappage is higher.In addition, in assembly process, the distortion of piston ring may cause to a certain degree damage to piston ring, and the piston ring of band damage can't check after entering buffer inside, and in use easily fracture, cause the undercarriage shock-absorbing capacity sharply to descend.
Therefore, in structural design, need a kind of novel structure to eliminate the distortion of piston ring in assembly process.
The model utility content
The purpose of this utility model is, overcomes the deficiencies in the prior art, adapts to the reality needs, and a kind of undercarriage buffer valve piston ring assembly parts is provided.
In order to realize the purpose of this utility model, the technical solution adopted in the utility model is:
A kind of undercarriage buffer valve piston ring assembly parts, comprise valve and piston ring, described valve external overall is the little Step Shaft shape structure of the large end of an end, and described valve small end is set with nut outward, form a draw-in groove between the large end of described valve and nut, described piston ring is sleeved in described draw-in groove.
Described nut is one large one small step nut, and the external diameter of the little head end of described nut is less than the large end external diameter of described valve, and the little head end of described nut and the large end of valve fit tightly the formation draw-in groove, and described piston ring is sleeved on described nut microcephaly and holds the outside.
Also be provided be used to the backing-up screw that prevents nut and valve generation relative movement.
The beneficial effects of the utility model are:
Total has been eliminated the deformation and damage that in the prior art, piston ring produces fully in assembly process, and assembly process is simple, easy to operate; Use checking through reality, the aircraft undercarriage buffer has been installed this type valve piston ring assembly parts, and installation process is simple, after the durability drop-test finishes, buffer is carried out overhaul, find that this structure is intact, illustrate that the utility model can satisfy design and operational requirement.
Description of drawings
Fig. 1 is undercarriage buffer valve piston ring assembling unit structure schematic diagram in prior art.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the sectional structure schematic diagram of the utility model undercarriage buffer valve piston ring assembly parts.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Embodiment: referring to Fig. 3.
A kind of undercarriage buffer valve piston ring assembly parts, comprise valve 1 and piston ring 2, described valve 1 external overall is the little Step Shaft shape structure of the large end of an end, described valve 1 small end is set with nut 3 outward, form a draw-in groove between the large end of described valve 1 and nut 3, described piston ring 2 is sleeved in described draw-in groove.
Described nut 3 is one large one small step nut, and the external diameter of described nut 3 little head ends is less than the large end external diameter of described valve 1, and large 1 end of the little head end of described nut 3 and valve fits tightly the formation draw-in groove, and described piston ring 2 is sleeved on described nut microcephaly and holds the outside.
Also be provided be used to preventing that nut 3 and valve 1 from the backing-up screw 4 of relative movement occuring.During assembling piston ring 2, can first piston ring 2 be put into the draw-in groove of valve 1, then nut 3 is screwed on valve 1, the internal thread part of screw hole is opened on nut 3 stub end inwalls, another part is opened the small end outer wall at valve 1, nut 3 is twisted good rear screw hole just mate alignment, then twist good backing-up screw 4, can complete assembling.
Total has been eliminated the deformation and damage that piston ring produces fully in assembly process, and assembly process is simple, easy to operate.
The aircraft undercarriage buffer has been installed this type valve piston ring assembly parts, and installation process is simple, after the durability drop-test finishes, buffer is carried out overhaul, finds that this structure is intact, illustrates that the utility model can satisfy design and operational requirement.
What embodiment of the present utility model announced is preferred embodiment; but be not limited to this; those of ordinary skill in the art; very easily according to above-described embodiment; understand spirit of the present utility model; and make different amplifications and variation, but only otherwise break away from spirit of the present utility model, all in protection domain of the present utility model.
Claims (3)
1. undercarriage buffer valve piston ring assembly parts, comprise valve and piston ring, it is characterized in that: described valve external overall is the little Step Shaft shape structure of the large end of an end, described valve small end is set with nut outward, form a draw-in groove between the large end of described valve and nut, described piston ring is sleeved in described draw-in groove.
2. undercarriage buffer valve piston ring assembly parts according to claim 1, it is characterized in that: described nut is one large one small step nut, the external diameter of the little head end of described nut is less than the large end external diameter of described valve, the little head end of described nut and the large end of valve fit tightly the formation draw-in groove, and described piston ring is sleeved on described nut microcephaly and holds the outside.
3. it is characterized in that: also be provided be used to the backing-up screw that prevents nut and valve generation relative movement according to claim 1 or undercarriage buffer valve piston ring assembly parts claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679552 CN202991995U (en) | 2012-12-11 | 2012-12-11 | Valve and piston ring combined part of landing gear buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679552 CN202991995U (en) | 2012-12-11 | 2012-12-11 | Valve and piston ring combined part of landing gear buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202991995U true CN202991995U (en) | 2013-06-12 |
Family
ID=48563178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220679552 Expired - Lifetime CN202991995U (en) | 2012-12-11 | 2012-12-11 | Valve and piston ring combined part of landing gear buffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202991995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032507A (en) * | 2012-12-11 | 2013-04-10 | 江西洪都航空工业集团有限责任公司 | Undercarriage bumper valve packing ring assembly |
-
2012
- 2012-12-11 CN CN 201220679552 patent/CN202991995U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032507A (en) * | 2012-12-11 | 2013-04-10 | 江西洪都航空工业集团有限责任公司 | Undercarriage bumper valve packing ring assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |