CN113911323A - Plunger and outer barrel positioning and mounting structure for undercarriage buffer and assembling method - Google Patents
Plunger and outer barrel positioning and mounting structure for undercarriage buffer and assembling method Download PDFInfo
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- CN113911323A CN113911323A CN202111336418.6A CN202111336418A CN113911323A CN 113911323 A CN113911323 A CN 113911323A CN 202111336418 A CN202111336418 A CN 202111336418A CN 113911323 A CN113911323 A CN 113911323A
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- plunger
- groove
- outer barrel
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- outer cylinder
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The invention discloses a plunger and outer cylinder positioning and mounting structure for an undercarriage buffer and an assembly method, wherein an outer cylinder reference groove and at least two first auxiliary grooves are arranged on an outer cylinder, a plunger reference groove and at least two second auxiliary grooves are arranged on a plunger, the first auxiliary grooves are uniformly distributed on two sides of the plunger reference groove according to X degrees, the second auxiliary grooves are uniformly distributed on two sides of the outer cylinder reference groove according to (X-delta) degrees, 30 degrees < X <90 degrees, and after the plunger reference groove and the outer cylinder reference groove are assembled, a deviation angle beta < delta < an included angle lambda of an undercarriage wheel axis and a buffer outer cylinder beam axis; the width dimension of a stop boss of the stop washer is consistent with the width dimensions of the outer barrel reference groove, the first auxiliary groove, the plunger reference groove and the second auxiliary groove, and meanwhile, the stop boss is inserted into the outer barrel reference groove and the plunger reference groove which are aligned on the outer barrel and the plunger or the first auxiliary groove and the second auxiliary groove.
Description
Technical Field
The invention relates to an aircraft landing gear buffer, in particular to a plunger and outer cylinder positioning and mounting structure for a landing gear buffer and an assembling method.
Background
The plunger 1 ' of the modern oil-gas type aircraft landing gear buffer is fixedly arranged in the landing gear buffer outer barrel 4 ', the upper cam is fixed at the bottom of the plunger 1 ', and the lower cam is fixed at the top of the piston rod C, as shown in figure 1. The accuracy and quality of the fixed installation of the plunger 1 'on the outer barrel 4' directly influence the requirement of the parallel angle between the axis D of the wheel of the undercarriage and the axis E of the cross beam of the outer barrel of the undercarriage bumper, thereby influencing whether the airplane can safely take off and land and slide.
As shown in fig. 2 and 3, the positioning and installation traditional structure of the landing gear bumper plunger 1 'and the outer cylinder 4' is as follows: the stop boss 12 'arranged on the stop washer 2' is simultaneously inserted into the stop grooves arranged on the plunger 1 'and the outer cylinder 4', and the mounting nut 3 'is mounted on the plunger 1' through the thread arranged on the plunger 1 'and simultaneously fixes the stop washer 2', thereby fixedly mounting the plunger 1 'on the outer cylinder 4'. Due to the fact that dimensional tolerance and form and position tolerance exist in manufacturing of parts such as the plunger, the outer barrel, the piston rod, the upper cam and the lower cam, assembling of the plunger and the lower cam and assembling of the piston rod and the upper cam, and due to accumulation of the tolerance, after the requirement of parallelism between the axis of the airplane wheel and the axis of a cross beam of the outer barrel is met, the plunger and a stop groove of the outer barrel are difficult to align completely. Therefore, special tools and equipment are required to be used for specially repairing the plunger, the stop groove of the outer cylinder and the stop boss of the stop washer, so that the manufacturing precision of parts such as the plunger, the outer cylinder, the piston rod, the upper cam and the lower cam is high, the assembling process is very complex, the production efficiency is low, the parts are careless, the plunger is easy to scrap due to improper repairing, meanwhile, the interchangeability of the plunger and the outer cylinder is very poor, and the production cost and the maintenance cost are high.
Therefore, the fixed installation structure of the plunger and the outer cylinder for the traditional undercarriage buffer is difficult to meet the requirements of the modern airplane on high reliability, maintainability and interchangeability, high production efficiency and low production and maintenance cost.
Disclosure of Invention
The invention aims to solve the technical problem that the invention provides the plunger and outer barrel positioning and mounting structure for the undercarriage buffer and the assembly method thereof, which can realize the plunger assembly precision and quality by only finely adjusting the plunger without changing the installation positioning and connecting mode, the bearing state and the basic function of the plunger in the buffer, greatly reduce the manufacturing and plunger assembly process difficulty of related components and the comprehensive cost of production and maintenance, improve the assembly working efficiency and maintainability of the undercarriage buffer and ensure the interchangeability of the plunger and the outer barrel.
It should be noted that, in the present specification, the terms "left side", "right side", "up" and "down" refer to the left side, right side, up and down with respect to the carrier of the drawings.
In order to solve the technical problems, the invention adopts the following technical scheme: a plunger and outer barrel positioning and mounting structure for an undercarriage buffer comprises a plunger, an outer barrel, a stop washer and a mounting nut, wherein the top of the plunger is provided with a threaded shaft, the plunger is mounted in the outer barrel, the threaded shaft extends out of the outer barrel, the stop washer is sleeved outside the outer barrel, the mounting nut is in threaded connection with the threaded shaft and is pressed on the stop washer, the outer barrel is provided with an outer barrel reference groove and at least two first auxiliary grooves, the plunger is provided with a plunger reference groove and at least two second auxiliary grooves, the first auxiliary grooves are uniformly distributed on two sides of the plunger reference groove according to X degrees, the second auxiliary grooves are uniformly distributed on two sides of the outer barrel reference groove according to (X-delta) degrees, 30 degrees < X <90 degrees, and the delta value is smaller than an included angle lambda between an undercarriage wheel axis and a buffer outer barrel beam axis, and is greater than or equal to the value of the deviation angle beta after the plunger reference groove and the outer cylinder reference groove are assembled; the locking washer is characterized in that a locking boss is radially arranged on an inner ring of the locking washer, a lug piece is arranged on an outer ring of the locking washer, the width of the locking boss is consistent with the width of the outer barrel reference groove, the first auxiliary groove, the plunger reference groove and the second auxiliary groove, meanwhile, the locking boss is inserted into the outer barrel reference groove and the plunger reference groove which are completely aligned with the plunger, or the first auxiliary groove and the second auxiliary groove, and the lug piece is buckled on the locking washer.
When the plunger for the undercarriage buffer is specifically assembled with the outer cylinder positioning and mounting structure, the traditional mounting, positioning and connecting mode of the plunger in the buffer is kept, namely the plunger is sleeved in a stepped hole of the outer cylinder in a matching way through a stepped shaft of the plunger, the stop washer is sleeved on the plunger, the stop boss of the stop washer is simultaneously inserted in a group of grooves aligned with the outer cylinder and the plunger in a matching way, the mounting nut is mounted on the plunger through threads and is in contact pressure with the stop washer, and the mounting nut can be prevented from rotating by bending the lug of the stop washer, so that the plunger can not move up and down along the axis of the plunger and can not rotate, and the plunger is fixedly mounted on the outer cylinder in a positioning way.
If the plunger, the outer barrel, the piston rod, the upper cam and the lower cam are manufactured, the plunger and the lower cam are assembled, and the piston rod and the upper convex wheel are assembled, dimensional tolerance and form and position tolerance exist, and the tolerance is accumulated, so that when the requirement of an included angle between the axis of the wheel and the axis of the outer barrel cross beam of the undercarriage bumper is met, a deviation angle of beta degrees exists between the plunger reference groove and the outer barrel reference groove, the plunger reference groove and the outer barrel reference groove are difficult to be completely centered, and the stop boss of the stop washer cannot be simultaneously inserted into the plunger and the outer barrel reference groove. However, because the left and right sides of the outer barrel reference groove are respectively provided with the first auxiliary grooves which are uniformly distributed according to X degrees, and the left and right sides of the plunger reference groove are respectively provided with the second auxiliary grooves which are uniformly distributed according to (X-delta) °, only the plunger (delta-beta) °isneeded to be rotated leftwards or rightwards, one of the second auxiliary grooves on the left and right sides of the plunger and one of the first auxiliary grooves on the left and right sides of the outer barrel are completely centered, the stop lug of the stop washer can be simultaneously matched and inserted into one group of grooves which are centered on the plunger and the outer barrel, the mounting nut is screwed, the lug of the stop washer is bent, and the lug is buckled on the mounting nut, so that the positioning and fixing mounting of the plunger on the outer barrel can be completed.
And because the delta-degree value is smaller than the lambda-degree value which is the required value of the included angle between the axis of the airplane wheel and the axis of the outer cylinder crossbeam of the undercarriage buffer, and is larger than or equal to beta degrees, namely the (delta-beta) degree value is also smaller than the lambda-degree value, after the plunger rotates by the (delta-beta) degree, the actual included angle between the axis of the airplane wheel and the axis of the outer cylinder crossbeam of the undercarriage buffer can still meet the value smaller than the lambda-degree value, and therefore the safe taking off and landing and sliding of the airplane can be guaranteed.
Preferably, two second auxiliary grooves are respectively and uniformly distributed on two sides of the plunger datum groove, and two first auxiliary grooves are respectively and uniformly distributed on two sides of the outer barrel datum groove.
Preferably, the mounting nut is a hexagonal nut.
Preferably, the outer ring of the stop washer is provided with the lug corresponding to the stop boss.
Preferably, X is 60 degrees.
Based on the same invention concept, the invention also provides an assembly method of the plunger and outer cylinder positioning and mounting structure for the undercarriage buffer, which comprises the following steps:
a piston rod provided with an upper cam and a plunger provided with a lower cam are combined into a component, a stepped shaft of the plunger is matched and sleeved in a stepped hole of an outer cylinder, and the requirement of an included angle lambda between the axis of an undercarriage wheel and the axis of a cross beam of the outer cylinder of the buffer is met through related tools;
if the plunger datum groove and the outer barrel datum groove are completely aligned, the stop washer is sleeved on the outer barrel, meanwhile, the stop boss of the stop washer is inserted into the plunger datum groove and the outer barrel datum groove in a matched mode, the mounting nut is mounted on the threaded shaft of the plunger through threads, the mounting nut is pressed on the stop washer in a contact mode from top to bottom, and the lug piece of the stop washer is bent towards the mounting nut and buckled on the mounting nut;
if the plunger reference groove and the outer cylinder reference groove are not completely centered and a deviation angle beta exists, the plunger is firstly rotated by (delta-beta) degrees leftwards or rightwards, at the moment, if the (delta-beta) value is larger than 0.5 delta value, a first auxiliary groove on the left side or the right side of the plunger reference groove and a first second auxiliary groove on the left side or the right side of the outer cylinder reference groove are completely centered, and if the (delta-beta) value is smaller than 0.5 delta value, a second first auxiliary groove on the left side or the right side of the plunger reference groove and a second auxiliary groove on the left side or the right side of the outer cylinder reference groove are completely centered; and sleeving the stop washer on the outer cylinder, inserting the stop boss of the stop washer into the first auxiliary groove and the second auxiliary groove which are completely aligned with the outer cylinder in a matched manner, mounting the mounting nut on the threaded shaft of the plunger through threads, pressing the mounting nut on the stop washer from top to bottom, and bending the lug piece of the stop washer towards the mounting nut and buckling the lug piece on the mounting nut.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, when the positioning grooves of the plunger and the outer cylinder (in the invention, the plunger reference groove and the outer cylinder reference groove) cannot be completely centered due to tolerance accumulation of manufacturing and assembling of parts such as the plunger and the like, special repair is carried out on the positioning grooves of the plunger and the outer cylinder and other parts by using special tools and equipment, so that the assembling precision and quality of the undercarriage buffer can be ensured, the manufacturing difficulty of related components and the assembling process difficulty of the buffer are greatly reduced, the comprehensive cost of production and maintenance is reduced, the assembling working efficiency and maintainability of the undercarriage buffer are improved, and the interchangeability of the plunger and the outer cylinder is also ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the assembly structure of a conventional aircraft landing gear and plunger.
Fig. 2 is an external view of a conventional plunger and outer cylinder positioning and mounting structure for a landing gear bumper.
Fig. 3 is a sectional view a-a of fig. 2.
FIG. 4 is a schematic view of a plunger and outer barrel positioning and mounting structure for a landing gear bumper according to the present invention.
Fig. 5 is a view from direction B of fig. 4.
Fig. 6 is a cross-sectional view C-C of fig. 5.
Fig. 7 is a partial structural schematic view of the outer tub of the present invention.
Fig. 8 is a view from direction D of fig. 7.
Fig. 9 is a partial structural schematic view of the plunger of the present invention.
Fig. 10 is a view in the direction E of fig. 9.
Fig. 11 is a schematic view of the stop washer of the present invention.
Fig. 12 is a sectional view F-F of fig. 11.
In the figure:
1 ', a plunger, 2 ', a stop washer, 3 ', an installation nut, 4 ', an outer cylinder, a piston rod, a wheel axis, an outer cylinder beam axis and a stop boss, wherein the piston rod is C, D, the wheel axis, E, the outer cylinder beam axis and 12 ';
1. the plunger piston comprises a plunger piston, 2 parts of a stop washer, 3 parts of a mounting nut, 4 parts of an outer cylinder, 5 parts of an outer cylinder reference groove, 6 parts of a reference groove, 5 parts of a first auxiliary groove, 7 parts of a first auxiliary groove, 8 parts of a plunger piston reference groove, 9 parts of a second auxiliary groove, 10 parts of a second auxiliary groove, 11 parts of a threaded shaft, 12 parts of a stop boss and 13 parts of a lug piece.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.
As shown in fig. 4 to 6, one embodiment of the positioning and mounting structure for the plunger and the outer cylinder of the landing gear buffer of the invention comprises a plunger 1, a stop washer 2, a mounting nut 3 and an outer cylinder 4.
As shown in fig. 7 to 8, an outer cylinder reference groove 5 is arranged on the outer cylinder 4, and meanwhile, 2 first auxiliary grooves 6 uniformly distributed at 60 ° are arranged on the left side of the outer cylinder reference groove 5, and 2 first auxiliary grooves 7 uniformly distributed at 60 ° are also arranged on the right side;
as shown in fig. 9 to 10, a threaded shaft 11 for mounting the mounting nut 3 is provided at the top of the plunger 1, a plunger reference groove 8 is provided on the threaded shaft 11, and 2 second auxiliary grooves 9 uniformly distributed at (60- δ) ° are provided at the left side of the plunger reference groove 8, and 2 second auxiliary grooves 10 uniformly distributed at (60- δ) ° are provided at the right side;
as shown in fig. 11 to 12, a stop boss 12 is provided on the inner ring of the stop washer 2, a tab 13 is provided on the outer ring corresponding to the stop boss 12, the width of the stop boss 12 is the same as the width of the outer cylinder reference groove 5, the first auxiliary groove 6, the first auxiliary groove 7, the plunger reference groove 8, the second auxiliary groove 9, and the second auxiliary groove 10, and the stop boss 12 can be inserted into all the grooves in a matching manner.
During assembly, a piston rod provided with an upper cam and a plunger 1 provided with a lower cam are combined into a component, the component is sleeved in a stepped hole of an outer barrel 4 through the matching of a plunger stepped shaft, and the requirement of the parallel angle between an airplane wheel axis D and an outer barrel cross beam axis E of a buffer is met through related tools.
If the plunger datum groove 8 and the outer barrel datum groove 5 are completely aligned, the stop washer 2 is sleeved on the outer barrel 4, meanwhile, the stop boss 12 of the stop washer 2 is inserted into the plunger datum groove 8 and the outer barrel datum groove 5 in a matched mode, the mounting nut 3 is mounted on the threaded shaft 11 of the plunger 1 through threads and is pressed on the stop washer 2 from top to bottom, the lug piece 13 is buckled on the mounting nut 3 through bending the lug piece 13 of the stop washer 2 towards the mounting nut 3, the mounting nut 3 can be prevented from rotating, therefore, the plunger 1 can not move up and down along the axis of the plunger and can not rotate, and the plunger 1 is fixedly mounted on the outer barrel 4 in a positioning mode.
When the plunger reference groove 8 and the outer cylinder reference groove 5 are not completely centered and a deviation angle of beta degrees exists, the plunger 1 is rotated by (delta-beta) degrees leftwards or rightwards, if the (delta-beta) value is larger than 0.5 delta value, a first second auxiliary groove on the left side or the right side of the plunger reference groove 8 and a first auxiliary groove on the left side or the right side of the outer cylinder reference groove 5 are completely centered, and if the (delta-beta) value is smaller than 0.5 delta value, a second auxiliary groove on the left side or the right side of the plunger reference groove 8 and a second first auxiliary groove on the left side or the right side of the outer cylinder reference groove 5 are completely centered; the locking washer 2 is sleeved on the outer cylinder 4, the locking boss 12 of the locking washer 2 is simultaneously matched and inserted into a group of first auxiliary groove and second auxiliary groove which are completely aligned between the plunger 1 and the outer cylinder 4, the mounting nut 3 is mounted on the threaded shaft 11 of the plunger 1 through threads and is pressed on the locking washer 2, the lug 13 is buckled on the mounting nut 3 by bending the lug 13 of the locking washer 2, so that the mounting nut 3 can be prevented from rotating, therefore, the plunger 1 can not move up and down along the axis of the plunger and can not rotate, and the rotating (delta-beta) degree value of the plunger 1 is adjusted to be smaller than the lambda-degree value required by the parallel angle between the wheel axis D and the outer cylinder cross beam axis E of the buffer, so that the convenient, safe, high-quality and efficient positioning mounting connection of the plunger 1 on the outer cylinder 4 is completed.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (6)
1. A plunger and outer barrel positioning and mounting structure for an undercarriage buffer comprises a plunger (1), an outer barrel (4), a stop washer (2) and a mounting nut (3), wherein a threaded shaft (11) is arranged at the top of the plunger, the plunger is mounted in the outer barrel, the threaded shaft extends out of the outer barrel, the stop washer is sleeved outside the outer barrel, the mounting nut is in threaded connection with the threaded shaft and is pressed on the stop washer, the undercarriage buffer is characterized in that an outer barrel reference groove and at least two first auxiliary grooves are formed in the outer barrel, a plunger reference groove and at least two second auxiliary grooves are formed in the plunger, the first auxiliary grooves are uniformly distributed on two sides of the plunger reference groove according to X degrees, the second auxiliary grooves are uniformly distributed on two sides of the outer barrel reference groove according to (X-delta) degrees, 30 degrees < X <90 degrees, wherein the value delta is smaller than the included angle lambda between the axis of the undercarriage wheel and the axis of the cross beam of the outer cylinder of the buffer and is larger than or equal to the value of the deviation angle beta after the plunger reference groove and the outer cylinder reference groove are assembled; the locking washer is characterized in that a locking boss (12) is radially arranged on an inner ring of the locking washer, a lug (13) is arranged on an outer ring of the locking washer, the width of the locking boss is consistent with the width of the outer barrel reference groove, the first auxiliary groove, the plunger reference groove and the second auxiliary groove, meanwhile, the locking boss is inserted into the outer barrel reference groove and the plunger reference groove which are completely aligned with the plunger, or the first auxiliary groove and the second auxiliary groove, and the lug is buckled on the locking washer.
2. The landing gear bumper plunger and outer cylinder positioning and mounting structure according to claim 1, wherein two first auxiliary grooves are uniformly distributed on two sides of the outer cylinder reference groove, and two second auxiliary grooves are uniformly distributed on two sides of the plunger reference groove.
3. The landing gear bumper plunger and outer barrel locating and mounting structure as claimed in claim 1, wherein the mounting nut is a hex nut.
4. The landing gear bumper plunger and outer barrel locating and mounting structure according to claim 1, wherein the tab is provided on the outer ring of the stop washer corresponding to the stop boss.
5. The landing gear bumper plunger and outer barrel locating and mounting structure according to claim 1, wherein X is 60 degrees.
6. A method of assembling a plunger and barrel locating and mounting structure for a landing gear bumper according to any one of claims 1 to 5, comprising:
a piston rod provided with an upper cam and a plunger provided with a lower cam are combined into a component, a stepped shaft of the plunger is matched and sleeved in a stepped hole of an outer cylinder, and the requirement of an included angle lambda between the axis of an undercarriage wheel and the axis of a cross beam of the outer cylinder of the buffer is met through related tools;
if the plunger datum groove (8) and the outer barrel datum groove (5) are completely aligned, the stop washer (2) is sleeved on the outer barrel (4), meanwhile, the stop boss (12) of the stop washer is inserted into the plunger datum groove and the outer barrel datum groove in a matched mode, the mounting nut (3) is mounted on the threaded shaft (11) of the plunger through threads, the mounting nut is pressed on the stop washer in a contact mode from top to bottom, and the lug piece (13) of the stop washer is bent towards the mounting nut and buckled on the mounting nut;
if the plunger reference groove and the outer cylinder reference groove are not completely centered and a deviation angle beta exists, the plunger is firstly rotated by (delta-beta) degrees leftwards or rightwards, at the moment, if the (delta-beta) value is larger than 0.5 delta value, a first second auxiliary groove on the left side or the right side of the plunger reference groove and a first auxiliary groove on the left side or the right side of the outer cylinder reference groove are completely centered, and if the (delta-beta) value is smaller than 0.5 delta value, a second auxiliary groove on the left side or the right side of the plunger reference groove and a second first auxiliary groove on the left side or the right side of the outer cylinder reference groove are completely centered; and sleeving the stop washer on the outer cylinder, inserting the stop boss of the stop washer into the first auxiliary groove and the second auxiliary groove which are completely aligned on the plunger and the outer cylinder in a matched manner, then installing the installation nut on the threaded shaft of the plunger through threads, pressing the installation nut on the stop washer from top to bottom, and bending the lug piece (13) of the stop washer towards the installation nut and buckling the lug piece on the installation nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336418.6A CN113911323B (en) | 2021-11-12 | 2021-11-12 | Positioning and mounting structure and assembly method for plunger and outer cylinder for undercarriage buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336418.6A CN113911323B (en) | 2021-11-12 | 2021-11-12 | Positioning and mounting structure and assembly method for plunger and outer cylinder for undercarriage buffer |
Publications (2)
| Publication Number | Publication Date |
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| CN113911323A true CN113911323A (en) | 2022-01-11 |
| CN113911323B CN113911323B (en) | 2023-09-29 |
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| CN202111336418.6A Active CN113911323B (en) | 2021-11-12 | 2021-11-12 | Positioning and mounting structure and assembly method for plunger and outer cylinder for undercarriage buffer |
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| CN (1) | CN113911323B (en) |
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|---|---|---|---|---|
| GB524368A (en) * | 1938-05-27 | 1940-08-05 | Cleveland Pneumatic Tool Co | Improvements in or relating to wheel mountings for aircraft |
| JPS5676589U (en) * | 1979-11-19 | 1981-06-22 | ||
| GB9109480D0 (en) * | 1991-05-02 | 1991-06-26 | Hui Lin M | A wedge-chuck connector for steel bar splice |
| US5221168A (en) * | 1990-06-22 | 1993-06-22 | Mitsuba Electric Manufacturing Co., Ltd. | Device for fixing external part to shaft |
| GB9407821D0 (en) * | 1993-04-24 | 1994-06-15 | Rubery Owen Rockwell Ltd | Lock washers |
| US6290038B1 (en) * | 1999-03-29 | 2001-09-18 | Lord Corporation | Elastomer damper |
| US20110033261A1 (en) * | 2009-08-04 | 2011-02-10 | Airbus Operations Limited | Retaining nut |
| CN201891651U (en) * | 2010-11-10 | 2011-07-06 | 上海邦浦实业集团有限公司 | Novel impeller nut locking structure |
| JP2014081062A (en) * | 2012-10-12 | 2014-05-08 | Tsugunaga Tada | Lock bolt and nut |
| CN205244090U (en) * | 2015-11-26 | 2016-05-18 | 淮安信息职业技术学院 | Improved generation is lock washer for round nut |
| CN207728709U (en) * | 2017-08-31 | 2018-08-14 | 浙江中通汽车零部件有限公司 | Clinch fastener assembling assembly |
| CN109570328A (en) * | 2018-11-27 | 2019-04-05 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of locking high temperature alloy stop washer and its manufacturing method |
| CN113107951A (en) * | 2021-04-09 | 2021-07-13 | 中航飞机起落架有限责任公司 | Bolt connection nut anti loosening structure |
-
2021
- 2021-11-12 CN CN202111336418.6A patent/CN113911323B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB524368A (en) * | 1938-05-27 | 1940-08-05 | Cleveland Pneumatic Tool Co | Improvements in or relating to wheel mountings for aircraft |
| JPS5676589U (en) * | 1979-11-19 | 1981-06-22 | ||
| US5221168A (en) * | 1990-06-22 | 1993-06-22 | Mitsuba Electric Manufacturing Co., Ltd. | Device for fixing external part to shaft |
| GB9109480D0 (en) * | 1991-05-02 | 1991-06-26 | Hui Lin M | A wedge-chuck connector for steel bar splice |
| GB9407821D0 (en) * | 1993-04-24 | 1994-06-15 | Rubery Owen Rockwell Ltd | Lock washers |
| US6290038B1 (en) * | 1999-03-29 | 2001-09-18 | Lord Corporation | Elastomer damper |
| US20110033261A1 (en) * | 2009-08-04 | 2011-02-10 | Airbus Operations Limited | Retaining nut |
| CN201891651U (en) * | 2010-11-10 | 2011-07-06 | 上海邦浦实业集团有限公司 | Novel impeller nut locking structure |
| JP2014081062A (en) * | 2012-10-12 | 2014-05-08 | Tsugunaga Tada | Lock bolt and nut |
| CN205244090U (en) * | 2015-11-26 | 2016-05-18 | 淮安信息职业技术学院 | Improved generation is lock washer for round nut |
| CN207728709U (en) * | 2017-08-31 | 2018-08-14 | 浙江中通汽车零部件有限公司 | Clinch fastener assembling assembly |
| CN109570328A (en) * | 2018-11-27 | 2019-04-05 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of locking high temperature alloy stop washer and its manufacturing method |
| CN113107951A (en) * | 2021-04-09 | 2021-07-13 | 中航飞机起落架有限责任公司 | Bolt connection nut anti loosening structure |
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| Publication number | Publication date |
|---|---|
| CN113911323B (en) | 2023-09-29 |
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