CN109760827B - Connecting structure and connecting method of main bearing part and functional part and buffer strut - Google Patents
Connecting structure and connecting method of main bearing part and functional part and buffer strut Download PDFInfo
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- CN109760827B CN109760827B CN201910144155.5A CN201910144155A CN109760827B CN 109760827 B CN109760827 B CN 109760827B CN 201910144155 A CN201910144155 A CN 201910144155A CN 109760827 B CN109760827 B CN 109760827B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 9
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention relates to a connecting structure, a connecting method and a buffer strut for a main bearing part and a functional part, wherein a columnar mounting cavity is formed in the main bearing part, a first annular groove is formed in the side wall of the mounting cavity, and the first annular groove is superposed with the central axis of the mounting cavity; the adapter is arranged in the mounting cavity and comprises a first cylinder section matched with the mounting cavity and a second cylinder section extending out of the mounting cavity; the outer side surface of the axial stopping mechanism is abutted with the outer side surface of the first annular groove, the inner side surface of the axial stopping mechanism is abutted with the second cylinder section, and the bottom end surface of the fastening cylinder is abutted with the top surface of the axial stopping mechanism; the functional member is connected to the second barrel section. The invention provides a reasonable, simple, compact and reliable connecting structure without threads on the main bearing part for the main bearing part and the functional part, and improves the fatigue resistance, the maintainability and the service life of the main bearing part.
Description
Technical Field
The invention relates to a connecting structure and a connecting method of a main bearing part and a functional part and a buffer strut, belonging to the field of undercarriage structure design.
Background
The outer cylinder of the buffer strut is one of main bearing parts of the landing gear, bears and transmits huge load and impact energy of an airplane during shutdown, sliding, takeoff and landing, and the ultrahigh-strength steel (such as 300M steel) has good transverse plasticity and fracture toughness so as to obtain good fatigue resistance, and is widely applied to the field of aerospace. Due to the fine crystal grains of the ultrahigh-strength steel and the like, the ultrahigh-strength steel has high notch sensitivity and is not suitable for machining threads.
In the structure of the buffer support and the like, functional parts such as an inflating nozzle, a sensor, a switching valve and the like in a threaded connection mode are still necessary, the threaded connection of the functional parts is simple, convenient and easy to process, and the functional parts are finished goods shelves or industry standard parts after years of flight tests. Therefore, the connection form of the main functional parts in the prior art is still threaded and cannot be replaced within a certain time.
The existing main bearing part is mainly connected with the functional part through threads, and the threads are connected to a great extent, so that the fatigue resistance and the maintainability of the main bearing part are reduced, and the use cost of the undercarriage is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a connecting structure, a connecting method and a buffer strut for a main bearing part and a functional part, so as to realize the threadless connection between the main bearing part and the functional part, improve the fatigue resistance, the maintainability and the service life of the main bearing part.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the connecting structure of the main bearing part and the functional part is characterized in that the main bearing part is provided with a columnar mounting cavity, the side wall of the mounting cavity is provided with a first annular groove, and the central axis of the first annular groove is superposed with the central axis of the mounting cavity; the adapter is installed in the installation cavity and comprises a first cylinder section matched with the installation cavity and a second cylinder section extending out of the installation cavity, the first cylinder section and the second cylinder section are integrally connected, the central axes of the first cylinder section and the second cylinder section are overlapped, the length of the first cylinder section is equal to the distance between the first annular groove and the bottom surface of the installation cavity, and the outer diameter of the second cylinder section is smaller than that of the first cylinder section; the outer side surface of the axial stopping mechanism is abutted with the outer side surface of the first annular groove, the inner side surface of the axial stopping mechanism is abutted with the second cylinder section, and the bottom end surface of the fastening cylinder is abutted with the top surface of the axial stopping mechanism; the functional member is connected to the second barrel section.
For convenience of description, in the present invention, when viewed in the radial direction, a side of a certain component closer to the central axis of the mounting cavity is referred to as "inner side", and a side of the component farther from the central axis of the mounting cavity is referred to as "outer side".
Therefore, the axial stopping mechanism effectively limits the freedom degree of the adapter in the direction of the central axis under the limiting action of the first annular groove, the fastening cylinder and the second cylinder section, so that the adapter is installed on the main bearing part and is in threadless connection with the main bearing part; the functional part passes through the adapter and installs on main load spare, has avoided traditional threaded connection, and is rational in infrastructure, compact, and easy dismounting becomes traditional threaded installation cavity "unthreaded hole" installation cavity, can reduce the breach quantity on the main load spare as far as, promotes main load spare's antifatigue characteristic and maintainability.
Further, the main bearing member is made of ultra-high strength steel.
Further, the axial stopping mechanism comprises a retainer ring fixed in the first annular groove, the retainer ring extends to the top surface of the first cylinder section along the radial direction, and a support gasket is abutted between the inner side surface of the retainer ring and the outer side surface of the second cylinder section. So, the supporting washer is located the retaining ring downthehole, can prevent effectively that the retaining ring atress from shrinking and popping out, promotes the reliability that the retaining ring is connected.
Further, the bottom end face of the fastening cylinder is abutted with a supporting gasket, and the thickness of the supporting gasket is not less than that of the check ring. So, through guaranteeing that the support washer is pressed by the fastening barrel, prevent that the support washer from drunkenness from top to bottom and lead to the packing ring to shift, further promote connection structure's reliability.
Further, the retainer ring comprises at least 2 first unit sections; the support gasket includes at least 2 second unit segments. Therefore, the installation can be conveniently carried out in a smaller installation space.
Furthermore, the outer wall of the second cylinder section is provided with an external thread, and the inner wall of the fastening cylinder is provided with an internal thread matched with the external thread. Through threaded connection, the assembly and disassembly can be facilitated, and the stepless regulation of the pressure of the axial stop mechanism by the fastening cylinder is realized.
Furthermore, a second annular groove is formed in the outer wall of the second cylinder section, the bottom surface of the second annular groove and the top surface of the first cylinder section are located on the same radial plane, enough space is provided, and the axial stopping mechanism is convenient to mount.
Further, the top surface of the second annular groove is positioned outside the mounting cavity.
Further, the outer wall of the first cylinder section is provided with a plurality of sealing grooves, and sealing pieces are arranged in the sealing grooves to realize sealing.
Further, the functional piece is connected with the adapter through threads.
Further, the functional element includes one or more of an inflation nozzle, a sensor, and a transfer valve.
The connecting method of the connecting structure comprises the following steps:
s1, mounting the adapter into the mounting cavity;
s2, mounting an axial stopping mechanism between the first annular groove and the second cylinder section;
s3, mounting the fastening barrel on the adapter so that the bottom end face of the fastening barrel abuts against the top face of the axial stop mechanism;
s4, connecting the functional part to the adapter;
wherein, S4 can be adjusted to be before S1 or performed simultaneously with one of S1, S2, S3.
The buffer strut comprises an outer cylinder, and a functional part is mounted on the outer cylinder through the connecting structure. The outer cylinder is taken as the main bearing member.
Compared with the prior art, the invention has the following beneficial effects:
(1) the connecting structure which is reasonable, simple, compact and reliable and has no thread on the main bearing part is provided for the main bearing part and the functional part, so that the fatigue resistance, the maintainability and the service life of the main bearing part are improved;
(2) in the undercarriage test, different tools can be matched by designing different adapter seats, so that the universality and interchangeability are improved, and the test cost is reduced;
(3) and a supporting gasket is additionally arranged in an inner hole of the check ring and used for preventing the check ring from shrinking and popping up after being stressed, so that the connection reliability of the existing check ring is improved.
Drawings
Fig. 1 is an overall schematic view of a connection structure of a first embodiment of the present invention.
Fig. 2 is an enlarged view of a portion B in fig. 1.
Fig. 3 is a schematic structural view of a retainer ring of the present invention.
Fig. 4 is a schematic view of the structure of the support washer of the present invention.
In the figure: 1-sealing element, 2-adapter, 3-main bearing element, 4-retainer ring, 5-supporting washer, 6-fastening cylinder and 7-functional element.
Detailed Description
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
As shown in fig. 1 to 4, in the connection structure of the main bearing member and the functional member, a columnar mounting cavity 301 is formed in the main bearing member 3, a first annular groove 8 is formed in the side wall of the mounting cavity, and the central axis of the first annular groove 8 coincides with the central axis of the mounting cavity; the adapter 2 is installed in the installation cavity, the adapter 2 comprises a first cylinder section 201 matched with the installation cavity and a second cylinder section 202 extending out of the installation cavity, the first cylinder section 201 and the second cylinder section 202 are integrally connected, the central axes of the first cylinder section 201 and the second cylinder section 202 are overlapped, the length of the first cylinder section 201 is equal to the distance between the first annular groove 8 and the bottom surface of the installation cavity, and the outer diameter of the second cylinder section 202 is smaller than the outer diameter of the first cylinder section 201; the clamping device further comprises an axial stopping mechanism and a fastening cylinder 6 detachably connected with the second cylinder section 202, the fastening cylinder is sleeved on the second cylinder section and extends into the mounting cavity 301, the outer side surface of the axial stopping mechanism is abutted with the outer side surface of the first annular groove 8, the inner side surface of the axial stopping mechanism is abutted with the second cylinder section 202, and the bottom end surface of the fastening cylinder 6 is abutted with the top surface of the axial stopping mechanism; the function 7 is connected to the second cylinder section 202.
The axial stopping mechanism comprises a retainer ring 4 fixed in the first annular groove 8, the retainer ring 4 extends to the top surface of the first cylinder section 201 along the radial direction, and a support gasket 5 is abutted between the inner side surface of the retainer ring 4 and the outer side surface of the second cylinder section 202.
The bottom end surface of the fastening cylinder 6 is abutted with a supporting gasket 5, and the thickness of the supporting gasket 5 is slightly larger than that of the retainer ring 4.
The retainer ring 4 comprises 3 sections of first unit sections 401; the support washer 5 includes 2 second unit segments 501.
And the outer wall of the second cylinder section 202 is provided with an external thread, and the inner wall of the fastening cylinder 6 is provided with an internal thread matched with the external thread.
The outer wall of the second cylinder section 202 is provided with a second annular groove 2021, and the bottom surface of the second annular groove 2021 and the top surface of the first cylinder section 201 are located on the same radial plane.
The top surface of the second annular groove 2021 is located outside the mounting chamber 301.
The outer wall of first barrel section 201 is equipped with 2 seal grooves that distribute from top to bottom, be equipped with sealing member 1 in the seal groove.
The connecting method of the connecting structure comprises the following steps:
s1, installing the adapter 2 into the installation cavity 301;
s2, installing an axial stop mechanism between the first annular groove 8 and the second barrel section 202;
s3, mounting the fastening barrel 6 on the adapter 2, so that the bottom end face of the fastening barrel 6 abuts against the top face of the axial stop mechanism;
s4, connecting the functional element 7 to the adapter 2.
The buffer strut comprises an outer cylinder, and a functional part is mounted on the outer cylinder through the connecting structure. The installation cavity is communicated with the high-pressure cavity 9 of the outer cylinder. The inner cavity of the first cylinder section is communicated with the high-pressure cavity 9, the functional part 7 is in threaded connection with the second cylinder section, and the functional part 7 extends into the second cylinder section.
In conclusion, the conventional threaded connection is transferred from the main bearing part (the ultrahigh-strength steel part) to the secondary bearing part through the adapter with the sealing rubber ring; the three-piece check ring is used for limiting the connecting seat, and the supporting gasket is used for preventing the check ring from shrinking and popping up after being stressed; the support washer is fixed by means of a clamping sleeve. The invention has simple installation and maintenance, avoids the processing of threads on the main bearing part, is beneficial to reducing the manufacturing cost of products and improving the service life of the products.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (9)
1. The connecting structure of the main bearing part and the functional part is characterized in that a cylindrical mounting cavity (301) is formed in the main bearing part (3), a first annular groove (8) is formed in the side wall of the mounting cavity, and the central axis of the first annular groove (8) is overlapped with the central axis of the mounting cavity; the adapter (2) is installed in the installation cavity, the adapter (2) comprises a first cylinder section (201) matched with the installation cavity and a second cylinder section (202) extending out of the installation cavity, the first cylinder section (201) and the second cylinder section (202) are integrally connected, the central axes of the first cylinder section and the second cylinder section coincide, the length of the first cylinder section (201) is equal to the distance between the first annular groove (8) and the bottom surface of the installation cavity, and the outer diameter of the second cylinder section (202) is smaller than the outer diameter of the first cylinder section (201); the device also comprises an axial stopping mechanism and a fastening cylinder (6) detachably connected with the second cylinder section (202), wherein the outer side surface of the axial stopping mechanism is abutted against the outer side surface of the first annular groove (8), the inner side surface of the axial stopping mechanism is abutted against the second cylinder section (202), and the bottom end surface of the fastening cylinder (6) is abutted against the top surface of the axial stopping mechanism; the function (7) is connected to the second cylinder section (202);
the axial stopping mechanism comprises a retaining ring (4) fixed in the first annular groove (8), the retaining ring (4) extends to the top surface of the first cylinder section (201) along the radial direction, and a supporting gasket (5) is abutted between the inner side surface of the retaining ring (4) and the outer side surface of the second cylinder section (202).
2. The connection according to claim 1, characterized in that the bottom end face of the fastening cylinder (6) abuts against a support washer (5), the thickness of the support washer (5) being not less than the thickness of the retaining ring (4).
3. The connection according to claim 1, wherein the collar (4) comprises at least 2 segments of a first unit segment (401); the support washer (5) comprises at least 2 second unit segments (501).
4. The connection according to claim 1, characterized in that the outer wall of the second cylinder section (202) is provided with an external thread and the inner wall of the fastening cylinder (6) is provided with an internal thread matching the external thread.
5. A connection arrangement according to claim 1, characterised in that the second cylinder section (202) has a second annular groove (2021) formed in its outer wall, the bottom surface of the second annular groove (2021) being in the same radial plane as the top surface of the first cylinder section (201).
6. The connection according to claim 5, characterized in that the top surface of the second annular groove (2021) is located outside the mounting cavity (301).
7. The connection according to claim 1, characterized in that the outer wall of the first cylinder section (201) is provided with a number of sealing grooves in which sealing elements (1) are arranged.
8. The method of connecting structures according to any one of claims 1 to 7, comprising the steps of:
s1, installing the adapter (2) into the installation cavity (301);
s2, installing an axial stopping mechanism between the first annular groove (8) and the second cylinder section (202);
s3, mounting the fastening barrel (6) on the adapter (2) so that the bottom end face of the fastening barrel (6) abuts against the top face of the axial stop mechanism;
s4, connecting the functional piece (7) to the adapter (2);
wherein, S4 can be adjusted to be before S1 or performed simultaneously with one of S1, S2, S3.
9. A buffer strut comprising an outer cylinder, wherein a functional member is mounted on said outer cylinder by means of a connecting structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144155.5A CN109760827B (en) | 2019-02-27 | 2019-02-27 | Connecting structure and connecting method of main bearing part and functional part and buffer strut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910144155.5A CN109760827B (en) | 2019-02-27 | 2019-02-27 | Connecting structure and connecting method of main bearing part and functional part and buffer strut |
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| Publication Number | Publication Date |
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| CN109760827A CN109760827A (en) | 2019-05-17 |
| CN109760827B true CN109760827B (en) | 2020-08-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839716A (en) * | 1996-03-15 | 1998-11-24 | Vrm France | Device for transferring liquid under simple or accelerated gravity by means of a valve |
| CN103292123A (en) * | 2013-06-28 | 2013-09-11 | 中山市思锐摄影器材工业有限公司 | Unipod rotating device |
| CN203205555U (en) * | 2013-04-23 | 2013-09-18 | 晋西工业集团有限责任公司 | Cylindrical piece connecting structure preventing internal leads from twining |
| CN205037023U (en) * | 2015-10-13 | 2016-02-17 | 天津博益气动股份有限公司 | Mouth of pipe plugging device |
| CN207045672U (en) * | 2017-08-18 | 2018-02-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Airplane hatch cover fixed structure |
| CN109139777A (en) * | 2018-10-22 | 2019-01-04 | 中航飞机起落架有限责任公司 | A kind of sealing structure of damper leg |
-
2019
- 2019-02-27 CN CN201910144155.5A patent/CN109760827B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839716A (en) * | 1996-03-15 | 1998-11-24 | Vrm France | Device for transferring liquid under simple or accelerated gravity by means of a valve |
| CN203205555U (en) * | 2013-04-23 | 2013-09-18 | 晋西工业集团有限责任公司 | Cylindrical piece connecting structure preventing internal leads from twining |
| CN103292123A (en) * | 2013-06-28 | 2013-09-11 | 中山市思锐摄影器材工业有限公司 | Unipod rotating device |
| CN205037023U (en) * | 2015-10-13 | 2016-02-17 | 天津博益气动股份有限公司 | Mouth of pipe plugging device |
| CN207045672U (en) * | 2017-08-18 | 2018-02-27 | 中国航空工业集团公司沈阳飞机设计研究所 | Airplane hatch cover fixed structure |
| CN109139777A (en) * | 2018-10-22 | 2019-01-04 | 中航飞机起落架有限责任公司 | A kind of sealing structure of damper leg |
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| CN109760827A (en) | 2019-05-17 |
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