CN112303095A - Self-locking nut for sealing supporting plate - Google Patents
Self-locking nut for sealing supporting plate Download PDFInfo
- Publication number
- CN112303095A CN112303095A CN202011106150.2A CN202011106150A CN112303095A CN 112303095 A CN112303095 A CN 112303095A CN 202011106150 A CN202011106150 A CN 202011106150A CN 112303095 A CN112303095 A CN 112303095A
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- China
- Prior art keywords
- self
- locking nut
- sealing gasket
- sealing
- counter bore
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- 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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- 238000007789 sealing Methods 0.000 title claims abstract description 145
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 abstract description 18
- 239000003566 sealing material Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
- F16B37/145—Sleeve nuts, e.g. combined with bolts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The utility model provides a sealed layer board self-locking nut, includes layer board self-locking nut and installs in the sealed pad of layer board self-locking nut bottom surface, there is the bolt via hole on layer board self-locking nut both sides flange, and there is self-locking screw hole bottom surface middle part, its characterized in that: the sealing gasket is oval or quasi-oval, and the long axis of the sealing gasket is superposed with the connecting line of the two bolt through holes. The sealing area of the sealing gasket is enlarged to improve the sealing pressure resistance, and the direct contact between the edge of the sealing gasket and the external environment is avoided through the counter bore of the sealing gasket or the flange at the edge of the bottom surface of the supporting plate self-locking nut. Higher sealing pressure resistance is obtained, and simultaneously, the invention has better ageing resistance than the prior art.
Description
Technical Field
The invention belongs to the field of mechanical fasteners, and particularly relates to an airtight supporting plate self-locking nut.
Background
In modern production and manufacturing, particularly in the field of aerospace and the like with high air tightness requirements on mechanical assembly, the requirements on air tightness and aging resistance are higher and higher, and the air-tight double-lug supporting plate self-locking nut GB933-1988 commonly applied in the existing mechanical industry has the following problems in the application process in the field of aerospace:
1. the sealing material is exposed for a long time, and is often aged and peeled off in the air or in a complex use environment, so that the mounting part cannot play a sealing role.
2. The manufacturing process is not good, the sealing material is easy to accumulate on the thread and the hole bottom in the manufacturing process of the sealing material, and the cleaning efficiency is low. In the installation process, because the sealing material that screw thread and hole bottom pile up is not cleared up totally, in the screw thread closure process, unnecessary sealing material is piled up to the hole bottom gradually, after piling up the intensity limit that can bear that exceeds the sealing material, the condition that the hole bottom ftractures easily appears, causes the installation position to play sealed effect.
3. The sealing pressure-resistant capability is poor, and GB933-1988 in the prior art has the advantages that the top end of the airtight double-lug supporting plate self-locking nut is opened, the top end of the metal supporting plate self-locking nut is sealed only by a sealing material, so that the sealing pressure-resistant capability is poor, and the sealing material is very easy to age and fall off after being exposed outside for a long time.
In order to solve the problems, an external sealing cover is arranged for protecting a sealing material in top sealing in a patent CN103016500A, and a self-locking threaded hole in a self-locking nut of a supporting plate in a patent CN204591953U is designed to be a blind hole with the top completely sealing the self-locking threaded hole; in the two patents, the bottom sealing of the self-locking nut of the sealing supporting plate adopts a sealing gasket mounting counter bore, and then the sealing measure of mounting a circular sealing gasket in the counter bore is adopted to avoid the sealing material from being exposed outside. However, in practical application, especially in a use environment with high requirement on sealing pressure resistance, the sealing area of the bottom sealing gasket is limited, the sealing pressure resistance of the self-locking nut of the sealing supporting plate is low, and the ageing resistance is poor, so that the air tightness and the ageing resistance cannot meet the requirement of complex use environments such as aerospace and the like.
Disclosure of Invention
The problems that in the prior art, when the self-locking nut of the sealing supporting plate is used, the sealing pressure resistance of a bottom sealing gasket is low, and the anti-aging capacity is poor are solved.
The invention provides a sealing supporting plate self-locking nut which comprises a supporting plate self-locking nut and a bottom sealing gasket, wherein the supporting plate self-locking nut is made of metal.
Ear-shaped flanges for assembling and fixing are arranged on two sides of the supporting plate nut, and the symmetrically distributed ear-shaped flanges are respectively provided with a bolt through hole for assembling.
Preferably, the top of the supporting plate self-locking nut is closed, and the internal self-locking threaded hole is a blind hole, so that not only can the sealing material be prevented from being exposed outside, but also better sealing pressure resistance is realized.
The supporting plate nut can be cast into a blank body, and then the bottom end face, the bolt through hole and the internal self-locking thread are machined. For very small batches of carrier nuts, it is also possible to produce them from metal stock by means of all machining.
And a sealing gasket counter bore is coaxially arranged at the bottom of the supporting plate nut and the self-locking threaded hole, and a bottom sealing gasket with a corresponding size is assembled in the sealing gasket counter bore.
In the prior art, the bottom sealing gasket is of an annular structure, a circular hole with a diameter larger than the bottom diameter of the self-locking threaded hole is formed in the middle of the bottom sealing gasket, the outer edge of the bottom sealing gasket is circular and used for sealing the installation connecting surface of the bottom end face of the self-locking nut of the supporting plate, the thickness of the sealing gasket needs to be larger than the depth of a counter bore in the bottom of the self-locking nut of the supporting plate, and the size of the part of the sealing gasket higher than.
Preferably, the pressure resistance of the seal is improved by enlarging the sealing area of the seal, and a seal having an elliptical or oval-like shape may be used in view of the shape of the bottom surface of the pallet self-locking nut. The ellipse-like shape here refers to an outer shape similar to an elliptical shape, a deformed elliptical shape or an elongated circular shape, and is used to distinguish a standard circular shape from an elliptical shape.
In view of the distribution characteristics of the fastening bolts on the bottom end face of the self-locking nut of the supporting plate, the pressure distribution on the bottom of the self-locking nut after assembling and locking is in direct proportion to the distance from the center of the bolt, preferably, the extension shape of the bottom sealing gasket is oval, and the long axis of the bottom sealing gasket passes through the centers of the fixing bolts on the two sides, so that the sealing materials on the left side and the right side of the bottom sealing gasket are wider, and the pressure is also large when the; on the other hand, the distance between the fixing bolts at the two sides in the short-diameter direction of the elliptical outline of the sealing gasket is longer, the pressure transmitted by the fastening bolts at the two sides is also smaller, the sealing materials at the two sides in the short-diameter direction of the sealing gasket are also narrower, the pressure intensity of the sealing materials in the long-diameter direction and the short-diameter direction of the elliptical sealing gasket is closer to the same, and higher and more stable sealing pressure resistance can be ensured.
Further, in order to prevent the self-locking nut bottom sealing gasket from causing aging cracking due to edge stress concentration when being compressed, the sealing gasket counter bore is designed into a necking structure with a small outer opening diameter and a large inner opening diameter, so that a sufficient expansion space for the sealing gasket can be provided to avoid overflow when being compressed, meanwhile, the outer edge of the sealing gasket is wrapped by the side face of the counter bore, so that the aging cracking caused by stress concentration is greatly reduced, and the sealing pressure resistance and the aging resistance are improved.
Preferably, the bottom sealing gasket counter bore is designed to be an inverted cone counter bore with a small outer opening diameter and a large bottom diameter.
Preferably, the bottom sealing gasket counter bore is designed to be an inverted stepped bore with a small outer opening diameter and a large bottom diameter, and the cross section of the axis of the inner cavity of the counter bore is T-shaped.
Furthermore, the sealing gasket is correspondingly provided with corresponding matching characteristics according to the structural characteristics of the counter bore of the sealing gasket on the premise that enough expansion space is reserved in the sealing gasket, so that the effect of preventing the sealing gasket from falling off can be achieved.
Furthermore, the reserved expansion space between the sealing gasket and the side wall of the counter bore of the sealing gasket is preferably 90-95% of the natural expansion amount of the sealing gasket in a compressed state.
Preferably, the plane size of the bottom sealing gasket is enlarged to the maximum extent, the shape of the sealing gasket is in an ellipse-like shape which is the same as the bottom surface of the supporting plate self-locking nut, meanwhile, a sealing gasket counter bore at the bottom of the supporting plate self-locking nut is eliminated, the bottom sealing gasket is completely covered and compressed by the supporting plate nut to realize a sealing function, and holes are correspondingly formed in the screw through hole and the self-locking threaded hole in the central position of the sealing gasket. The pressure resistance of the bottom seal of the seal supporting plate nut is improved by increasing the area of the seal material. Simultaneously because the increase of seal area, better than prior art's sealed effect under equal ageing condition, that is to say have better ageing resistance than prior art.
Furthermore, one or more sealing lines can be arranged at the bottom of the sealing gasket, the shape of the sealing line can be circular or any closed shape, the section of the sealing line can be semicircular, trapezoidal, triangular or other tooth shapes similar to a triangle, and the sealing line can improve the pressure resistance of sealing.
Further, in order to prevent the edge of the bottom sealing gasket of the supporting plate self-locking nut from being aged due to the fact that the edge of the bottom sealing gasket is contacted with the external environment, a circle of flange used for protecting the edge of the bottom sealing gasket is arranged at the edge of the bottom surface of the supporting plate self-locking nut, similarly, the edge of the bottom surface of the supporting plate self-locking nut is also provided with an annular flange, the height of the flange is lower than the thickness of the bottom sealing gasket, the height difference of the flange is used for ensuring that the sealing gasket has proper compression amount to ensure the sealing effect, and meanwhile, the flange at the edge of the bottom of the supporting plate self-locking nut is flush with the lower surface of the.
In summary, the following beneficial effects are achieved by the technical improvement of the invention:
1. by enlarging the sealing area of the bottom sealing gasket, higher sealing pressure resistance is obtained;
2. under the same aging degree, the larger sealing area enables the sealing effect of the self-locking nut of the sealing supporting plate to be better than that of the prior art, namely the self-locking nut has better aging resistance than that of the prior art.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of embodiment 1 of the present invention.
Fig. 2 is a bottom view of embodiment 1 of the present invention.
FIG. 3 is an enlarged view of a part I of example 1 of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of embodiment 2 of the present invention.
Fig. 5 is a bottom view of embodiment 2 of the present invention.
Fig. 6 is a partially enlarged view E of embodiment 2 of the present invention.
Fig. 7 is a schematic cross-sectional structure diagram according to embodiment 3 of the present invention.
Fig. 8 is a bottom view of embodiment 3 of the present invention.
Fig. 9 is a partial enlarged view S of embodiment 3 of the present invention.
Fig. 10 is a schematic cross-sectional view of embodiment 4 of the present invention.
Fig. 11 is a bottom view of embodiment 4 of the present invention.
In the figure: 1. the self-locking nut of the supporting plate, 2, a sealing gasket, 11, a self-locking threaded hole, 12, a screw through hole and 21, a sealing line.
Detailed Description
The invention is further described below in conjunction with the drawings and the detailed description of the invention to assist in understanding the content of the invention.
Referring to FIGS. 1-3, the following will describe example 1 of the present invention.
As shown in fig. 1, the present invention provides a self-locking nut for a sealing splint, which comprises a self-locking nut 1 for a splint made of metal and a bottom gasket 2.
Ear-shaped flanges for assembling and fixing are arranged on two sides of the supporting plate nut, and the symmetrically distributed ear-shaped flanges are respectively provided with a bolt through hole for assembling.
The top of the supporting plate self-locking nut is closed, and the internal self-locking threaded hole is a blind hole, so that the sealing material can be prevented from being exposed outside, and the supporting plate self-locking nut also has better sealing pressure resistance.
The bottom of the supporting plate self-locking nut 1 and the self-locking threaded hole are coaxially provided with a sealing gasket counter bore, and a bottom sealing gasket 2 with a corresponding size is assembled in the sealing gasket counter bore.
As shown in fig. 2, the extension shape of the bottom gasket 2 is an ellipse, and the long axis of the bottom gasket passes through the centers of the fixing bolts at the two sides, so that the sealing materials at the left and right sides of the bottom gasket are wider, and the pressure is also large when the bottom gasket is close to the fastening bolts; on the other hand, the distance between the fixing bolts at the two sides in the short-diameter direction of the elliptical outline of the sealing gasket is longer, the pressure transmitted by the fastening bolts at the two sides is also smaller, the sealing materials at the two sides in the short-diameter direction of the sealing gasket are also narrower, the pressure intensity of the sealing materials in the long-diameter direction and the short-diameter direction of the elliptical sealing gasket is closer to the same, and higher and more stable sealing pressure resistance can be ensured.
As shown in fig. 1 and 3, in order to prevent the edge stress concentration from causing aging cracking when the bottom sealing gasket of the self-locking nut is compressed, the counter bore of the bottom sealing gasket is designed to be an inverted cone counter bore with a small outer opening diameter and a large bottom diameter, so that a sufficient expansion space of the sealing gasket can be provided to avoid overflow when the bottom sealing gasket is compressed, meanwhile, the outer edge of the sealing gasket is wrapped by the side face of the counter bore, the aging cracking caused by the stress concentration is greatly reduced, and the sealing pressure resistance and the aging resistance are improved.
Referring to FIGS. 4-6, the following will describe embodiment 2 of the present invention.
The difference between the present embodiment and embodiment 1 is only that the shape of the inner part of the seal gasket counterbore is different, so the repeated parts are not repeated, and only the newly added features are described in detail below.
In embodiment 2, as shown in fig. 4 and 6, the bottom gasket counter bore is designed as an inverted stepped bore with a small outer opening diameter, a large bottom diameter, and a T-shaped axial center section of an inner cavity of the counter bore.
As shown in fig. 6, the sealing gasket 2 is provided with a corresponding matching feature according to the structural characteristics of the counter bore of the sealing gasket on the premise that a sufficient expansion space (not shown) is left in the sealing gasket, so that the sealing gasket can be prevented from falling off.
Furthermore, the reserved expansion space between the sealing gasket and the side wall of the counter bore of the sealing gasket is preferably 90-95% of the natural expansion amount of the sealing gasket in an assembling and pressing state.
Referring to FIGS. 7-9, the following will describe embodiment 3 of the present invention.
As shown in fig. 7, the present embodiment discloses a self-locking nut for a sealing splint, which includes a self-locking nut 1 made of metal and a bottom gasket 2.
As shown in fig. 7 and 8, the shape of the bottom sealing gasket is the same as that of the bottom surface of the self-locking nut of the supporting plate, and the self-locking threaded holes of the sealing gasket at the screw through holes and the central position are correspondingly provided with holes. The pressure resistance of the bottom seal of the seal supporting plate nut is improved by increasing the area of the seal material. Simultaneously because the increase of seal area, better than prior art's sealed effect under equal ageing condition, that is to say have better ageing resistance than prior art.
As shown in fig. 8 and 9, two sealing lines 201 are arranged at the bottom of the gasket 2, the contour of the sealing lines is circular, the cross section of the sealing lines is semicircular, and the sealing lines can improve the pressure resistance of the seal.
Referring to fig. 10 and 11, embodiment 4 of the present invention will be explained.
As shown in fig. 10, the present embodiment discloses a self-locking nut for a sealing splint, which includes a self-locking nut 1 made of metal and a bottom gasket 2.
As shown in fig. 10, in order to prevent the edge of the bottom sealing gasket 2 of the pallet self-locking nut 1 from being aged due to the contact with the external environment, a circle of flange 13 for protecting the edge of the bottom sealing gasket is arranged at the edge of the bottom surface of the pallet self-locking nut, similarly, the edge of the self-locking threaded hole at the bottom surface of the pallet self-locking nut is also provided with an annular flange 13, the height of the flange is lower than the thickness of the bottom sealing gasket, the height difference of the flange is required to ensure that the sealing gasket has a proper compression amount to ensure the sealing effect, and meanwhile, when the sealing gasket obtains a sufficient compression amount, the flange at the edge of the bottom of the pallet self-locking nut is.
In conclusion, the sealing area of the bottom sealing gasket is enlarged to different degrees and the sealing line is increased, so that higher sealing pressure resistance is obtained; meanwhile, under the same aging degree, the sealing effect of the self-locking nut of the sealing supporting plate is better than that of the prior art due to the larger sealing area, namely the self-locking nut has better aging resistance than that of the prior art.
The above description is only a few application examples of the present invention, and the scope of the present invention should not be limited thereby, and any combination and single use of the structural elements in the above embodiments should be within the scope of the present invention. All simple equivalent changes and modifications made within the scope of the claims and the description of the invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a sealed layer board self-locking nut, includes layer board self-locking nut and installs in the sealed pad of layer board self-locking nut bottom surface, there is the bolt via hole on layer board self-locking nut both sides flange, and there is self-locking screw hole bottom surface middle part, its characterized in that: the sealing gasket is oval or quasi-oval, and the long axis of the sealing gasket is superposed with the connecting line of the two bolt through holes.
2. The seal carrier self-locking nut of claim 1, wherein: the bottom surface of the supporting plate self-locking nut is provided with a counter bore for installing a sealing gasket, and the counter bore is of a necking structure with the opening diameter smaller than the bottom diameter.
3. The seal carrier self-locking nut of claim 2, wherein: the counter bore is the back taper counter bore that the external orifice diameter is little, and bottom diameter is big.
4. The seal carrier self-locking nut of claim 2, wherein: the counter bore is an inverted stepped hole with a small diameter of an outer opening and a large diameter of the bottom, and the cross section of the axis of the inner cavity of the counter bore is T-shaped.
5. The seal carrier self-locking nut of any one of claims 2 to 4, wherein: and a sealing gasket expansion space is reserved between the sealing gasket and the side wall of the counter bore.
6. The seal carrier self-locking nut of claim 5, wherein: the reserved expansion space between the sealing gasket and the side wall of the counter bore is 90-95% of the compression type horizontal size expansion amount of the sealing gasket.
7. The seal carrier self-locking nut of claim 1, wherein: one or more sealing lines with closed outlines are arranged at the bottom of the sealing gasket, and the section of each sealing line can be in a semicircular shape, a trapezoidal shape, a triangular shape or other tooth shapes similar to a triangular shape.
8. The seal carrier self-locking nut of claim 1, wherein: the edge of the bottom surface of the supporting plate self-locking nut is provided with a circle of flange for protecting the bottom sealing gasket, and the height of the flange is smaller than the thickness of the sealing gasket.
9. The seal carrier self-locking nut of claim 8, wherein: the edge of the self-locking threaded hole on the bottom surface of the self-locking nut of the supporting plate is provided with an annular flange, and the height of the flange is smaller than the thickness of the sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011106150.2A CN112303095A (en) | 2020-10-16 | 2020-10-16 | Self-locking nut for sealing supporting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011106150.2A CN112303095A (en) | 2020-10-16 | 2020-10-16 | Self-locking nut for sealing supporting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303095A true CN112303095A (en) | 2021-02-02 |
Family
ID=74327647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011106150.2A Pending CN112303095A (en) | 2020-10-16 | 2020-10-16 | Self-locking nut for sealing supporting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112303095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439835A (en) * | 2021-12-24 | 2022-05-06 | 河南航天精工制造有限公司 | Sealing cover of nut component and nut component |
| CN114439835B (en) * | 2021-12-24 | 2024-05-31 | 河南航天精工制造有限公司 | Sealing cover of nut assembly and nut assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0020833A1 (en) * | 1979-06-26 | 1981-01-07 | Rosan Engineering Corp | Closure assembly |
| CN104121267A (en) * | 2014-08-08 | 2014-10-29 | 贵州航天精工制造有限公司 | Sealing self-locking nut assembly and manufacturing method |
| CN110725846A (en) * | 2019-09-11 | 2020-01-24 | 河南航天精工制造有限公司 | Sealing nut assembly |
| CN210599760U (en) * | 2019-06-18 | 2020-05-22 | 浙江吉利控股集团有限公司 | Waterproof bolt |
| CN211648744U (en) * | 2019-06-21 | 2020-10-09 | 杨富云 | Locking device of bolt and nut and anti-loosening washer thereof |
-
2020
- 2020-10-16 CN CN202011106150.2A patent/CN112303095A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0020833A1 (en) * | 1979-06-26 | 1981-01-07 | Rosan Engineering Corp | Closure assembly |
| CN104121267A (en) * | 2014-08-08 | 2014-10-29 | 贵州航天精工制造有限公司 | Sealing self-locking nut assembly and manufacturing method |
| CN210599760U (en) * | 2019-06-18 | 2020-05-22 | 浙江吉利控股集团有限公司 | Waterproof bolt |
| CN211648744U (en) * | 2019-06-21 | 2020-10-09 | 杨富云 | Locking device of bolt and nut and anti-loosening washer thereof |
| CN110725846A (en) * | 2019-09-11 | 2020-01-24 | 河南航天精工制造有限公司 | Sealing nut assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439835A (en) * | 2021-12-24 | 2022-05-06 | 河南航天精工制造有限公司 | Sealing cover of nut component and nut component |
| CN114439835B (en) * | 2021-12-24 | 2024-05-31 | 河南航天精工制造有限公司 | Sealing cover of nut assembly and nut assembly |
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