CN215293183U - Fastener for single-side installation - Google Patents
Fastener for single-side installation Download PDFInfo
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- CN215293183U CN215293183U CN202120842578.7U CN202120842578U CN215293183U CN 215293183 U CN215293183 U CN 215293183U CN 202120842578 U CN202120842578 U CN 202120842578U CN 215293183 U CN215293183 U CN 215293183U
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Abstract
The utility model belongs to the mechanical design makes the field, concretely relates to single-sided installation fastener. The method comprises the following steps: the bolt comprises a bolt body, a stop bush, an insert and a deformation self-locking nut, wherein the end part of the stop bush is a countersunk head, the tail part of the stop bush is a conical surface, the middle section of the stop bush is a cylindrical surface, the tail part of the stop bush is provided with knurls, and the part of the middle section of the stop bush, which is close to the conical surface, is provided with first stop knurl stripes; the inner wall of the deformation self-locking nut is divided into a deformation area and a thread area, and the diameter of the inner wall of the deformation area is larger than the inner diameter of the thread area; the inner wall surface and the outer wall surface of the deformation zone are both provided with second stop knurl stripes; the bolt body comprises a bolt head, a middle polished rod and a tail section thread, wherein the bolt head is a countersunk head; the insert is disposed against the inner wall surface of the deformation zone. The flatness is high, the strength is high, the tail end is low, structural holes are reduced, and the overall weight of the structure is reduced; and single-sided connection of a high-strength structure is realized.
Description
Technical Field
The utility model belongs to the mechanical design makes the field, concretely relates to single-sided installation fastener.
Background
Along with the development of long service life, large load and high reliability of an airplane, the overall structures of materials such as airplane aluminum alloy and composite materials are more and more large, the load of single-side installation and fastening is more and more large, the traditional blind rivet, bolt and supporting plate nut cannot meet the requirements of design and design, and particularly the requirements of model development and development cannot be met in the aspects of flushing degree, high load, high clamping force and the like.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: a blind-installed fastener is provided to achieve high flush, high shear, short tail end of the structure and fastener.
The technical scheme is as follows:
in a first aspect, there is provided a blind installation fastener comprising: the bolt comprises a bolt body 1, a stop bush 2, an insert 3 and a deformation self-locking nut 4, wherein the end part of the stop bush 2 is a countersunk head, the tail part of the stop bush 2 is a conical surface, the middle section of the stop bush 2 is a cylindrical surface, the tail part of the stop bush 2 is provided with knurls, and the part of the middle section of the stop bush 2, which is close to the conical surface, is provided with first stop knurl stripes 8; the inner wall of the deformation self-locking nut 4 is divided into a deformation area 10 and a thread area, and the diameter of the inner wall of the deformation area 10 is larger than the inner diameter of the thread area; the inner wall surface and the outer wall surface of the deformation zone 10 are both provided with second stop knurl stripes 11; the bolt body 1 comprises a bolt head, a middle polished rod and a tail section thread, wherein the bolt head is a countersunk head, and the bolt body 1 is arranged on the bolt body; the insert 3 is arranged against the inner wall surface of the deformation zone 10.
Further, the countersunk top surface of the stop bush 2 is provided with a second female stop groove 7.
Further, the deformed self-locking nut 4 is provided with a locking element 12.
Further, the countersunk head top surface of the bolt body 1 is provided with a first concave driving groove 5.
Further, the insert 3 is a non-metallic insert.
Further, the outer diameter of the deformed self-locking nut 4 is not larger than the outer diameter of the stop bush 2.
Has the advantages that:
the utility model realizes the single-side installation of the bolt and the nut, has the characteristics of high flush degree, high strength and low tail end, replaces the traditional bolt and the supporting plate nut, reduces the structural hole making and lightens the whole weight of the structure; and single-sided connection of a high-strength structure is realized.
Drawings
FIG. 1 is a cross-sectional view of a construction of a blind installation fastener according to an embodiment of the present invention;
fig. 2 is an installation schematic of a blind installation fastener according to an embodiment of the invention.
The bolt comprises a bolt body 1, a stop bush 2, an insert 3, a deformed self-locking nut 4, a first concave driving groove 5, a first thread 6, a second concave stop groove 7, a first stop knurled stripe 8, a second thread 9, a deformation area 10, a second stop knurled stripe 11 and a locking element 12.
Detailed Description
The utility model provides a single face installation fastener, include: the bolt comprises a bolt body 1, a stop bush 2, an insert 3 and a deformation self-locking nut 4, wherein the end part of the stop bush 2 is a countersunk head, the tail part of the stop bush 2 is a conical surface, the middle section of the stop bush 2 is a cylindrical surface, the tail part of the stop bush 2 is provided with knurls, and the part of the middle section of the stop bush 2, which is close to the conical surface, is provided with first stop knurl stripes 8; the inner wall of the deformation self-locking nut 4 is divided into a deformation area 10 and a thread area, and the diameter of the inner wall of the deformation area 10 is larger than the inner diameter of the thread area; the inner wall surface and the outer wall surface of the deformation zone 10 are both provided with second stop knurl stripes 11; the bolt body 1 comprises a bolt head, a middle polished rod and a tail section thread, wherein the bolt head is a countersunk head, and the bolt body 1 is arranged on the bolt body; the insert 3 is arranged against the inner wall surface of the deformation zone 10.
After the installation and rotation of the bolt and the nut are started, the closed space formed by the bolt body 1, the stop bush 2 and the deformed self-locking nut 4 is gradually reduced, the insert 3 extrudes the deformation area 10 of the deformed self-locking nut 4 outwards, and the auxiliary deformation area 10 starts to expand and deform.
The countersunk top face of the stop bush 2 is provided with a second, female stop groove 7. The deformed self-locking nut 4 is provided with a locking element 12. The countersunk head top surface of the bolt body 1 is provided with a first concave driving groove 5. The insert 3 is a non-metallic insert. The outer diameter of the deformed self-locking nut 4 is not larger than that of the stop bush 2.
Referring to fig. 1, a blind fastener according to an embodiment of the present invention includes a bolt body 1, a stopper bush 2, an insert 3, and a deformed self-locking nut 4. The bolt body 1 passes through the stop bush 2 and is engaged with the deformed self-locking nut 4. The head of the bolt body 1 is provided with a first concave driving groove 5, and the other end is provided with a first thread 6. The head of the stop bush 2 is provided with a second concave stop groove 7, and the tail end is provided with a first stop knurled line 8, and the second stop knurled line 11 is meshed with the deformed self-locking nut 4. The deformed self-locking nut 4 is provided with a second thread 9 and a locking element 12, no thread is arranged in a deformed area 10, the wall thickness is thin, the inner surface and the outer surface of the area are prevented from moving knurled stripes 11, and meanwhile, the insert 3 is embedded. After the installation and rotation of the bolt and the nut are started, the closed space formed by the bolt body 1, the stop bush 2 and the deformed self-locking nut 4 is gradually reduced, the insert 3 extrudes the deformation area 10 of the deformed self-locking nut 4 outwards, and the auxiliary deformation area 10 starts to expand and deform.
As shown in fig. 2, during installation, the locking bushing is locked by the installation tool, the deformation nut is locked by the locking bushing to rotate, the bolt body is driven by the installation tool to rotate relative to the nut, the threads are screwed to drive the deformation nut to move towards the bolt direction, the fastened structure is clamped, the bolt body is continuously driven to rotate, the deformation area of the deformation nut realizes radial expansion and axial folding under the action of axial force of the threads and extrusion force of the structural surface, and the structure is clamped, so that installation is completed.
Claims (6)
1. A blind installation fastener comprising: the bolt comprises a bolt body (1), a stop bush (2), an insert (3) and a deformation self-locking nut (4), wherein the end part of the stop bush (2) is a countersunk head, the tail part of the stop bush (2) is a conical surface, the middle section of the stop bush (2) is a cylindrical surface, the tail part of the stop bush (2) is provided with knurls, and the part of the middle section of the stop bush (2) close to the conical surface is provided with first stop knurl stripes (8); the inner wall of the deformation self-locking nut (4) is divided into a deformation area (10) and a thread area, and the diameter of the inner wall of the deformation area (10) is larger than the inner diameter of the thread area; the inner wall surface and the outer wall surface of the deformation zone (10) are both provided with second stop knurl stripes (11); the bolt body (1) comprises a bolt head, a middle polished rod and a tail section thread, wherein the bolt head is a countersunk head, and the bolt body (1) is arranged on the bolt head; the insert (3) is arranged in close contact with the inner wall surface of the deformation zone (10).
2. Fastener according to claim 1, characterized in that the countersunk top surface of the stop bush (2) is provided with a second female stop groove (7).
3. Fastener according to claim 1, characterized in that the deformable self-locking nut (4) is provided with locking elements (12).
4. Fastener according to claim 1, characterized in that the countersunk top surface of the bolt body (1) is provided with a first female driving groove (5).
5. Fastener according to claim 1, characterized in that the insert (3) is a non-metallic insert.
6. Fastener according to claim 1, characterized in that the outer diameter of the deformed self-locking nut (4) is not greater than the outer diameter of the stop bush (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120842578.7U CN215293183U (en) | 2021-04-22 | 2021-04-22 | Fastener for single-side installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120842578.7U CN215293183U (en) | 2021-04-22 | 2021-04-22 | Fastener for single-side installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215293183U true CN215293183U (en) | 2021-12-24 |
Family
ID=79537703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120842578.7U Active CN215293183U (en) | 2021-04-22 | 2021-04-22 | Fastener for single-side installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215293183U (en) |
-
2021
- 2021-04-22 CN CN202120842578.7U patent/CN215293183U/en active Active
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