CN108032999A - A kind of undercarriage buffer unit - Google Patents
A kind of undercarriage buffer unit Download PDFInfo
- Publication number
- CN108032999A CN108032999A CN201711231122.1A CN201711231122A CN108032999A CN 108032999 A CN108032999 A CN 108032999A CN 201711231122 A CN201711231122 A CN 201711231122A CN 108032999 A CN108032999 A CN 108032999A
- Authority
- CN
- China
- Prior art keywords
- bushing
- outer barrel
- buffer unit
- piston rod
- circle
- 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.)
- Pending
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention provides a kind of undercarriage buffer unit, including end cap (1), earrings bolt (2), outer barrel (3), piston rod (4), the first bushing (5), the second bushing (6), cylindroid helical-coil compression spring (10), the 3rd bushing (15)；End cap (1) is cylindrical structural member, its end face side is provided with the ears chip architecture of the 3rd bushing (15) of suit, the cylindric outer barrel (3) of its seam allowance side docking, wherein outer barrel (3) inner cavity is plugged in piston rod (4) one end of ladder hollow cylindrical, a circle cylindroid helical-coil compression spring (10) is set by being set with the first bushing (5) and the second bushing (6) in this section of piston rod (4) outside wall surface, which exposes grafting in the internal face of one end and set earrings bolt (2).Buffer unit provided by the present invention, reaches buffering purpose by compressing spring, avoids the problem that seal assembly takes excessive space in buffer unit and easily leaking causes reliability to reduce.
Description
Technical field
The invention belongs to field of airplane structure, and in particular to a kind of undercarriage buffer unit.
Background technology
Buffer unit is the common a kind of device for preventing shock loading from producing damage to part in all kinds of mechanical equipments.It is existing
There is the buffer unit of oil-gas mixing or air spring constructions, structure is more complicated, and reliability is low, and the maintenance cycle is short, dress
With complexity, particularly with regard to sealing structure, general volume is larger, while requirement on machining accuracy is very high.
The content of the invention
It is an object of the invention to solve problem above, there is provided a kind of reliability is high, small, assembling is simple and mitigates
The undercarriage buffer unit that impact force damages parts.
The purpose of the present invention is achieved through the following technical solutions：A kind of undercarriage buffer unit, including end cap, earrings spiral shell
Bolt, outer barrel, piston rod, the first bushing, the second bushing, cylindroid helical-coil compression spring, the 3rd bushing；End cap is cylindrical structural member,
Its end face side is provided with the ears chip architecture of the 3rd bushing of suit, the cylindric outer barrel of its seam allowance side docking, wherein in ladder
Piston rod one end of hollow cylindrical is plugged in outer tube inner chamber, by being set with the first bushing and the in this section of piston rod outside wall surface
Two bushings set a circle cylindroid helical-coil compression spring, which exposes grafting in the internal face of one end and set earrings bolt.
Preferably, piston rod path one end end has screwed hexagonal channel nut, and major diameter one end endface opens up
There are four uniformly distributed keyway notches.
Preferably, outer barrel top barrel is embedded with guard circle, and described piston rod path one end passes through the guard circle
Outer tube inner chamber is plugged in, the wherein guard circle is fitted close with outer barrel major diameter one end outside wall surface to prevent dust from entering in outer barrel
Portion.
Preferably, the earrings bolt is cylindrical element, and one end is provided with the circular hole for installing oscillating bearing, separately
One end screws in piston rod major diameter one end inner cavity by thread fitting, and keyway is offered in the outside wall surface of bolt middle part,
Nut is set with the keyway and coordinates the scotch of inserting with the piston rod keyway notch.
Preferably, the earrings bolt is provided with pump nozzle of circular hole one end end inserting for lubrication.
Preferably, second bushing is circle tube member, is circumferentially set in an axial end of the component outer tube wall
A circle outward flange, and the circumferentially arranged circle inward flange of another axial end in the component inner tube wall are put, wherein, outward flange
One end is contacted with outer barrel top barrel to connect, and inward flange coordinates locking with piston rod cascaded surface.
Preferably, first bushing is ladder circle Cylinder shape constructional element, the axial direction in the big outside diameter one end of the component outer tube wall
The circumferentially arranged circle outward flange in end, outward flange one end coordinates the end cap of installation to contact and connects with the outer barrel bottom；
The piston rod is plugged in the first bushing inner cavity, and hexagonal channel nut is screwed in the piston rod end, the nut and the first bushing
Inner wall cascaded surface coordinates locking.
Preferably, the end cap is connected through a screw thread with the outer barrel, and is screwed between the two with outer barrel in end cap
Tapered end holding screw to screw thread stop, wherein the tapered end holding screw along outer barrel radial direction set.
Preferably, the adjustable adjusting washer of thickness is set between the end cap and the outer barrel.
Preferably, the 3rd bushing is circle tube member, is circumferentially set in an axial end of the component outer tube wall
A circle flange is put, described the 3rd flange of bush one end of ears chip architecture two is oppositely arranged.
A kind of beneficial effect of undercarriage buffer unit provided by the present invention is, reaches buffering mesh by compressing spring
, avoiding seal assembly in oil-gas mixing buffer unit and taking excessive space and easily leak causes what reliability reduced
Problem.
Brief description of the drawings
Fig. 1 is the structure diagram of undercarriage buffer unit of the present invention；
Fig. 2 is the sectional view of undercarriage buffer unit of the present invention；
Schematic diagram when Fig. 3 is undercarriage buffer unit of the present invention non-working status；
Fig. 4 is schematic diagram when undercarriage buffer unit stroke of the present invention becomes short status；
Fig. 5 is schematic diagram when undercarriage buffer unit stroke of the present invention becomes long status.
Reference numeral：
1- end caps, 2- earrings bolt, 3- outer barrels, 4- piston rods, the first bushings of 5-, the second bushings of 6-, 7- adjusting washers, 8-
Limited block, 9- guard circles, 10- cylindroid helical-coil compression springs, 11- tapered ends holding screw, 12- nuts, 13- hexagonals channel nut,
14- pump nozzles, the 3rd bushings of 15-.
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or there is same or like element.Described embodiment is the present invention
Part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without creative efforts, belong to the scope of protection of the invention.
The undercarriage buffer unit of the present invention is described in further details below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of undercarriage buffer unit, including end cap 1, earrings bolt 2, outer barrel 3, piston rod 4,
First bushing 5, the second bushing 6, cylindroid helical-coil compression spring 10, the 3rd bushing 15.
End cap 1 is cylindrical structural member, its end face side is provided with ears chip architecture, in order to which abrasionproof is inside ears chip architecture
The 3rd bushing 15 is embedded in, the 3rd bushing 15 is copper circle tube member, in the axial end edge week of the component outer tube wall
To a circle flange is set, 15 flange one end of the 3rd bushing of ears chip architecture two is oppositely arranged, and the female coaxial on two bushings.
The cylindric outer barrel 3 of 1 seam allowance side of end cap docking, guard circle 9 is embedded with 3 top of outer barrel (with respect to 1 other end of the end cap) barrel,
End cap 1 is connected through a screw thread between the two with outer barrel 3, and screws the stopping to screw thread of tapered end holding screw 11 therebetween
Dynamic, the tapered end holding screw 11 selection is set along both radial directions, in order to ensure the stroke of buffer unit and clearance requirement,
End cap 1 is also set with the adjustable adjusting washer 7 of thickness between the two with outer barrel 3.
Piston rod 4 is in ladder hollow cylindrical, its path one end end has screwed hexagonal channel nut 13, major diameter one end end
The keyway notch of four certain depths is uniformly opened up at face.4 path one end of piston rod is plugged in 3 inner cavity of outer barrel through guard circle 9,
Wherein the guard circle 9 is fitted close with 3 major diameter one end outside wall surface of outer barrel to prevent dust from entering inside outer barrel 3.Live in the section
The both ends of 4 outside wall surface of stopper rod are set with the first bushing 5 and the second bushing 6, and two bush end faces distance determines the row of buffer unit
Journey.Wherein the second bushing 6 is circle tube member, and outward flange is enclosed in an axial end of the component outer tube wall circumferentially arranged one,
And the circumferentially arranged circle inward flange of another axial end in the component inner tube wall, outward flange one end and 3 top of outer barrel cylinder
Wall contact connects, and inward flange coordinates locking with 4 cascaded surface of piston rod.And the first bushing 5 is ladder circle Cylinder shape constructional element, in the component
The circumferentially arranged circle outward flange of axial end of the big outside diameter one end of outer tube wall, outward flange one end coordinates with 3 bottom of outer barrel installs
The contact of end cap 1 connect, and after piston rod 4 is inserted into the first bushing 5 inner cavity, hexagonal flute profile spiral shell is screwed in 4 end of piston rod
Mother 13, coordinates locking by the nut and 5 inner wall cascaded surface of the first bushing.Outer barrel 3,4 and two bushing three of piston rod are same
Axis mating parts.In two bushing outers suit, one circle cylindroid helical-coil compression spring 10, amount of spring compression is by small installed in piston rod 4
The hexagonal slotted nut 13 of footpath one end ensures.
Earrings bolt 2 is plugged in piston rod 4 and exposes in the internal face of one end, which is cylindrical element, it is inserted into
4 one end of piston rod is screwed in by thread fitting, and the other end is provided with the circular hole for installing oscillating bearing, wherein being provided with circle
The inserting of hole one end end offers keyway, at the keyway for the pump nozzle 14 lubricated in the outside wall surface of bolt middle part
It is set with nut 12 and coordinates the scotch 8 of inserting with 4 keyway notch of piston rod, which works as 4 four keyways of piston rod
One of notch is installed when being overlapped with the keyway on earrings bolt 2, which is used for retainer nut 12.
According to Fig. 3 to Fig. 5, the course of work of summary undercarriage buffer unit of the present invention.Fig. 3 is that buffer unit is inoperative
State, when buffer unit under external force, stroke becomes in short-term, and the second bushing 6 is in earrings bolt 2 and 4 sub-assembly of piston rod
Under promotion, cylindrically coiled spring 10 is set to be pressurized, as shown in Figure 4；When buffer unit under external force, when stroke is elongated, first
Bushing 5 makes cylindrically coiled spring 10 be pressurized, as shown in Figure 5, no matter delays under the promotion of earrings bolt 2 and 4 sub-assembly of piston rod
The stroke of flushing device is elongated or shortens that the stress for cylindrically coiled spring 10 is all compression, is effectively raised
The service life of torsionspring, has obtained the buffer unit of higher reliability.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (10)
1. a kind of undercarriage buffer unit, it is characterised in that including end cap (1), earrings bolt (2), outer barrel (3), piston rod
(4), the first bushing (5), the second bushing (6), cylindroid helical-coil compression spring (10), the 3rd bushing (15)；End cap (1) is cylindrical shape
Component, its end face side are provided with the ears chip architecture of the 3rd bushing (15) of suit, the cylindric outer barrel of its seam allowance side docking
(3), wherein being plugged in outer barrel (3) inner cavity in piston rod (4) one end of ladder hollow cylindrical, in this section of piston rod (4) outside
A circle cylindroid helical-coil compression spring (10), the piston rod are set by being set with the first bushing (5) and the second bushing (6) on wall
(4) expose grafting in the internal face of one end and earrings bolt (2) is set.
2. undercarriage buffer unit according to claim 1, it is characterised in that piston rod (4) path one end end
Hexagonal channel nut (13) is screwed, major diameter one end endface offers four uniformly distributed keyway notches.
3. undercarriage buffer unit according to claim 2, it is characterised in that outer barrel (3) top barrel is embedded with
Guard circle (9), described piston rod (4) path one end are plugged in outer barrel (3) inner cavity, the wherein guard circle through the guard circle (9)
(9) it is fitted close with outer barrel (3) major diameter one end outside wall surface to prevent that it is internal that dust from entering outer barrel (3).
4. undercarriage buffer unit according to claim 2, it is characterised in that the earrings bolt (2) is cylindric structure
Part, one end are provided with the circular hole for installing oscillating bearing, and the other end screws in the piston rod (4) major diameter one by thread fitting
Hold inner cavity, offer keyway in the outside wall surface of bolt middle part, be set with the keyway nut (12) and with the work
Stopper rod (4) keyway notch coordinates the scotch (8) of inserting.
5. undercarriage buffer unit according to claim 4, it is characterised in that the earrings bolt (2) is provided with circle
Pump nozzle (14) of hole one end end inserting for lubrication.
6. undercarriage buffer unit according to claim 4, it is characterised in that second bushing (6) is cylindrical shape structure
Part, in the circumferentially arranged circle outward flange of an axial end of the component outer tube wall, and another axis in the component inner tube wall
The circumferentially arranged circle inward flange of terminad, wherein, outward flange one end is contacted with the outer barrel (3) top barrel to connect, convex
Edge coordinates locking with piston rod (4) cascaded surface.
7. undercarriage buffer unit according to claim 6, it is characterised in that first bushing (5) is ladder barrel
Shape component, the circumferentially arranged circle outward flange of axial end in the big outside diameter one end of the component outer tube wall, outward flange one end and institute
Stating outer barrel (3) bottom coordinates the end cap (1) contact of installation to connect；The piston rod (4) is plugged in the first bushing (5)
Chamber, hexagonal channel nut (13) is screwed in piston rod (4) end, and the nut and the first bushing (5) inner wall cascaded surface, which coordinate, to be locked
Only.
8. undercarriage buffer unit according to claim 7, it is characterised in that the end cap (1) is logical with the outer barrel (3)
Threaded connection is crossed, and stop of the tapered end holding screw (11) to screw thread is screwed between the two in end cap (1) and outer barrel (3),
Wherein the tapered end holding screw (11) is set along outer barrel (3) radial direction.
9. undercarriage buffer unit according to claim 8, it is characterised in that the end cap (1) and the outer barrel (3) it
Between be set with the adjustable adjusting washer of thickness (7).
10. undercarriage buffer unit according to claim 9, it is characterised in that the 3rd bushing (15) is cylindrical shape
Component, in the circumferentially arranged circle flange of an axial end of the component outer tube wall, the 3rd bushing of ears chip architecture two
(15) flange one end is oppositely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711231122.1A CN108032999A (en) | 2017-11-29 | 2017-11-29 | A kind of undercarriage buffer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711231122.1A CN108032999A (en) | 2017-11-29 | 2017-11-29 | A kind of undercarriage buffer unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108032999A true CN108032999A (en) | 2018-05-15 |
Family
ID=62094604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711231122.1A Pending CN108032999A (en) | 2017-11-29 | 2017-11-29 | A kind of undercarriage buffer unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108032999A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109334957A (en) * | 2018-11-29 | 2019-02-15 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of lower portion connecting structure of undercarriage buffer |
| CN112027058A (en) * | 2020-09-10 | 2020-12-04 | 中国航空工业集团公司沈阳飞机设计研究所 | Self-rotating pull rod structure |
| CN113847372A (en) * | 2021-09-21 | 2021-12-28 | 中国航空工业集团公司西安飞机设计研究所 | Anti-loosening and anti-breaking undercarriage tension spring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201694006U (en) * | 2010-02-11 | 2011-01-05 | 哈尔滨飞机工业集团有限责任公司 | Two-way buffering mechanism of draw bar |
| CN103738494A (en) * | 2013-08-23 | 2014-04-23 | 中国航空工业集团公司西安飞机设计研究所 | Deploying and retracting actuator cylinder |
| CN106218875A (en) * | 2016-08-19 | 2016-12-14 | 中航飞机起落架有限责任公司 | A kind of strut Bidirectional buffering and undercarriage elastic jackstay |
| CN106286674A (en) * | 2015-06-05 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of autonomous retractable landing gear buffer |
-
2017
- 2017-11-29 CN CN201711231122.1A patent/CN108032999A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201694006U (en) * | 2010-02-11 | 2011-01-05 | 哈尔滨飞机工业集团有限责任公司 | Two-way buffering mechanism of draw bar |
| CN103738494A (en) * | 2013-08-23 | 2014-04-23 | 中国航空工业集团公司西安飞机设计研究所 | Deploying and retracting actuator cylinder |
| CN106286674A (en) * | 2015-06-05 | 2017-01-04 | 哈尔滨飞机工业集团有限责任公司 | A kind of autonomous retractable landing gear buffer |
| CN106218875A (en) * | 2016-08-19 | 2016-12-14 | 中航飞机起落架有限责任公司 | A kind of strut Bidirectional buffering and undercarriage elastic jackstay |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109334957A (en) * | 2018-11-29 | 2019-02-15 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of lower portion connecting structure of undercarriage buffer |
| CN112027058A (en) * | 2020-09-10 | 2020-12-04 | 中国航空工业集团公司沈阳飞机设计研究所 | Self-rotating pull rod structure |
| CN112027058B (en) * | 2020-09-10 | 2023-02-28 | 中国航空工业集团公司沈阳飞机设计研究所 | Self-rotating pull rod structure |
| CN113847372A (en) * | 2021-09-21 | 2021-12-28 | 中国航空工业集团公司西安飞机设计研究所 | Anti-loosening and anti-breaking undercarriage tension spring |
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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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180515 |