CN217207201U - Elastic expansion nut with rapid structure and detachable blind bolt - Google Patents
Elastic expansion nut with rapid structure and detachable blind bolt Download PDFInfo
- Publication number
- CN217207201U CN217207201U CN202220239181.3U CN202220239181U CN217207201U CN 217207201 U CN217207201 U CN 217207201U CN 202220239181 U CN202220239181 U CN 202220239181U CN 217207201 U CN217207201 U CN 217207201U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- nut
- section
- bolt
- inflation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dowels (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The embodiment of the utility model discloses elasticity inflation nut of quick structure and can dismantle blind bolt, including the shank of bolt, the periphery of shank of bolt is equipped with inflation nut, packing ring and nut in proper order by the cover, and inflation nut includes first sleeve and second sleeve, and the second sleeve is located in first telescopic inside, and the telescopic inner wall of second is provided with the internal thread, and first sleeve includes linkage segment and inflation section, the linkage segment with second sleeve fixed connection, the internal diameter of inflation section is greater than the telescopic external diameter of second, inflation section orientation are kept away from the orientation of linkage segment, the extension setting that leans out from the inner circle, circumference equipartition have a plurality of bar openings in the inflation section to make the inflation section have elasticity, and the inflation section is close to the packing ring. The utility model discloses an elasticity inflation nut of quick structure and can dismantle blind bolt for solve current blind bolt and can't install fast and dismantle, and the not good technical problem of mechanical properties such as intensity, tensile rigidity that current blind bolt was tied.
Description
Technical Field
The utility model relates to a fastener technical field especially relates to an elasticity inflation nut of quick structure and can dismantle blind bolt.
Background
Currently, in the fields of civil construction and mechanical installation, the installation requirement for connecting and fastening structural components is large. Regarding the bolts commonly used at present, when a structural member is connected and fastened, workers need to work on two sides of the structural member at the same time, which is troublesome, and the connection and fastening mode is suitable for the connection of open structural members and is not suitable for the situation that one structural member is of a closed structure.
In the prior art, the mounting and fastening can be performed from one side of the structure using blind bolts. However, the existing blind bolt needs more time for installation, and cannot be quickly removed after the installation is completed, so that the time is wasted, and the cost of manpower and material resources is increased; furthermore, the bolt shaft of the existing blind bolt is partially cut off, which results in the strength of the whole blind bolt being reduced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model discloses an elastic expansion nut with a quick structure and a detachable blind bolt, which can quickly pass through a mounting hole through the function that the expansion nut can elastically contract in the radial direction, so as to achieve the purpose of quick mounting; meanwhile, the detachable blind bolt has excellent mechanical properties such as strength, tensile rigidity and the like.
The embodiment of the utility model provides an elasticity inflation nut of quick structure, including inflation nut, inflation nut includes first sleeve and second sleeve, the second sleeve is located first telescopic inside, the telescopic inner wall of second is provided with the internal thread, first sleeve includes linkage segment and inflation section, the linkage segment with second sleeve fixed connection, the internal diameter of inflation section is greater than the telescopic external diameter of second, the inflation section orientation is kept away from the orientation of linkage segment, lean out from the inner circle and extend the setting, the circumference equipartition has a plurality of bar openings in the inflation section.
Further, the axial length of the first sleeve is greater than or equal to that of the second sleeve; alternatively, the length of the second sleeve is equal to the axial length of the connecting section.
Further, the number of the strip-shaped openings is 4-6.
Further, the inclination angle of the expansion section is 2-30 degrees.
Furthermore, the first sleeve is made of stainless steel; or the first sleeve is made of high-strength steel.
Further, the connecting section is provided with a circular arc chamfer at one end far away from the expansion section.
Further, the axial length of the strip-shaped opening is equal to the axial length of the expansion section, and the strip-shaped opening is parallel to the central axis of the expansion section.
The utility model discloses another embodiment provides a can dismantle blind bolt, including foretell quick structure's elasticity expansion nut and shank of bolt, the periphery of shank of bolt is overlapped in proper order and is equipped with packing ring and nut, the expansion nut supports with the one end of mounting hole and leans on, the packing ring supports with the other end of mounting hole and leans on.
Furthermore, a middle section body is further sleeved on the bolt rod and is located in a gap formed between the mounting hole and the bolt rod.
Further, the bolt rod is of a solid structure.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the embodiment of the utility model provides an elasticity inflation nut of quick structure, including inflation nut, inflation nut includes first sleeve and second sleeve, wherein is equipped with the internal thread on the telescopic inner wall of second, and first sleeve is including linkage segment and inflation section, and the second sleeve is together fixed with the linkage segment, and the internal diameter of inflation section is greater than the telescopic external diameter of second, and the inflation section orientation is kept away from the direction slope extension setting of linkage segment. The expansion section is provided with a plurality of strip-shaped openings. The embodiment of the utility model provides a can dismantle blind bolt is still provided, including shank of bolt, packing ring and nut, foretell expansion nut, packing ring and nut cover in proper order are established on the shank of bolt, and the expansion nut passes through the second sleeve and is fixed together with shank of bolt screw-thread fit, and the expansion section has elasticity can radially contract in order to pass the mounting hole on the closed structure, and after passing the mounting hole, the expansion section is the reconversion under the elastic force effect and can't pass the mounting hole again in reverse direction to make the one end of shank of bolt fix in mounting hole department; the other end of the bolt rod is abutted against the mounting hole through a gasket, and the bolt rod is integrally fixed at the mounting hole through tightening a nut. When the bolt is required to be disassembled, the nut and the washer are only required to be disassembled from the bolt rod, then the bolt rod is pulled by hand to rotate until the expansion nut is unscrewed from the bolt rod, namely, the nut, the washer, the bolt rod and the middle segment body positioned at the open end of the structural member can be recycled, and the waste of resources is reduced. According to the detachable blind bolt with the structure, the expansion nut can be quickly and laborsavingly passed through the mounting hole through the radial elastic contraction function of the expansion nut, so that the purpose of quick mounting is realized; the expansion nut is simple in structure and convenient to operate, and time cost and manpower and material resource cost can be greatly saved during installation and operation; simultaneously the utility model discloses a can dismantle blind bolt compares with current blind bolt, has excellent mechanical properties, guarantees to the connection fastening nature of knot component, and low in production cost, has improved economic benefits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural view of a detachable blind bolt according to a first embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of the expansion nut of FIG. 1;
FIG. 4 is a cross-sectional schematic view of the expansion nut of FIG. 1;
FIG. 5 is a schematic view of the detachable blind plug installation step of FIG. 1;
FIG. 6 is a schematic view of the removable blind plug installation step of FIG. 5;
FIG. 7 is a schematic view of the detachable blind plug installation step of FIG. 6;
FIG. 8 is a schematic view of the removable blind plug installation step of FIG. 7;
FIG. 9 is a schematic view of the removable blind plug installation step of FIG. 8;
FIG. 10 is a schematic view of the detachable blind plug installation step of FIG. 9;
FIG. 11 is a schematic view of the removable blind plug of FIG. 1 attached to a closed structure;
FIG. 12 is a schematic structural view of an expansion nut according to the second embodiment;
fig. 13 is a schematic cross-sectional view of fig. 12.
1-bolt rod, 2-expansion nut, 21-first sleeve, 211-connecting section, 212-expansion section, 213-strip-shaped opening, 214-arc chamfer, 22-second sleeve, 3-gasket, 4-nut, 5-middle section body, 6-closed structural member and 61-mounting hole.
Detailed Description
As shown in fig. 1-2, an embodiment of a detachable blind plug provided in an embodiment of the present invention includes: the bolt rod 1 is sequentially sleeved with an expansion nut 2, a washer 3 and a nut 4. When the blind bolt is used, the expansion nut 2 is positioned on one side of the closed structural part 6, the nut 4 is positioned on the other side of the closed structural part 6, the bolt rod 1 is fixed on the closed structural part 6 by screwing the nut 4, and the connecting and fastening effect of the detachable blind bolt is realized. Wherein the external diameter of packing ring 3 is greater than the internal diameter of mounting hole 61 on the closed structure 6, can increase the area of contact of nut 4 and closed structure 6 to guarantee the fastness of dismantling the blind bolt connection.
Specifically, as shown in fig. 3 to 4, the expansion nut 2 includes a first sleeve 21 and a second sleeve 22 located inside the first sleeve 21, wherein the inner wall of the second sleeve 22 has an internal thread matching the thread on the bolt shank 1; the first sleeve 21 has a connecting section 211 and an expansion section 212, the second sleeve 22 is fixed with the connecting section 211, and the expansion section 212 has an inner diameter larger than an outer diameter of the second sleeve 22. Specifically, the expansion section 212 faces away from the connecting section and is obliquely extended outwards from the inner ring, so that the cross section of the expansion section 212 is of a body-type structure, and a plurality of strip-shaped openings 213 are uniformly distributed on the expansion section 212 in the circumferential direction, so that the expansion section 212 has elasticity and can contract radially. In use, the expansion nut 2 is screwed on the bolt rod 1 by using the second sleeve 22, and then the expansion nut 2 is enabled to pass through the mounting hole 61 of the enclosed structural member 6 by using the function that the expansion section 212 can radially contract; after the expansion nut 2 passes through the mounting hole 61, the expansion section 212 is restored under the action of elastic force, and the outer diameter of the expansion section 212 far away from the connecting section 211 is larger than the inner diameter of the mounting hole 61, so that the expansion section 212 cannot reversely pass through the mounting hole 61, the expansion section 212 abuts against one side of the closed structural member 6, and the fixing effect of one end of the bolt rod 1 is realized.
In the present embodiment, the axial length of the second sleeve 22 is equal to the axial length of the first sleeve 21. The two ends of the second sleeve 22 are respectively located at the ends of the connecting section 211 and the expansion section 212, so that the thread engagement length between the second sleeve 22 and the bolt rod 1 can be increased, and the firmness of the connection between the expansion nut 2 and the bolt rod 1 is ensured. It should be noted that, in the present invention, since the connection section 211 is fixedly connected to the second sleeve 22, there is no clear boundary between the two, and it is specified that the outer diameter of the second sleeve 22, which is the whole of the outer diameter of the portion of the second sleeve 22 located inside the expansion section 212, i.e. the portion of the second sleeve 22 protruding from the end of the connection section 211 is the same as the outer diameter of the portion of the second sleeve 22 located inside the connection section 211, and the portion outside the second sleeve 22 is the connection section 211. Of course, it will be appreciated by those skilled in the art that the axial length of the second sleeve 22 may also be smaller than the axial length of the first sleeve 21, but at the same time larger than the axial length of the connection section 211, i.e. the second sleeve 22 is located inside the expansion section 212.
Further, in order to ensure that the bolt rod 1 is firmly attached to the mounting hole 61, the bolt rod 1 is prevented from shaking in the mounting hole 61, and the connection firmness is ensured, a middle section body 5 is arranged between the expansion nut 2 and the washer 3, and the middle section body 5 can be filled in a gap between the bolt rod 1 and the mounting hole 61 to play a role in fixing the bolt rod 1; and the axial length of the middle section body 5 equals the axial length of mounting hole 61, and the both ends of the middle section body 5 flush with the both ends of mounting hole 61 promptly, guarantees that the area of contact of expansion nut 2 and closed structure 6 is even along the circumference, and the circumference evenly supports when can also guaranteeing packing ring 3 can with the one end of closed structure 6 simultaneously and leans on, increases the stability that can dismantle blind bolt mechanical performance.
Specifically, the number of the strip-shaped openings 213 is 4-6, and if the number of the strip-shaped openings 213 is less than 4, the elasticity of the expansion section 212 is too small, so that when the expansion section passes through the mounting hole 61, a large acting force is required, and even because the elasticity is too small, the radial shrinkage is small, so that the expansion section cannot pass through the mounting hole 61; if the number of the strip-shaped openings 213 is greater than 6, the number of the process steps is increased, and the strength of the expansion section 212 is reduced, so that the bolt shank cannot be firmly fixed when it abuts against one end of the mounting hole 61. Further, in this embodiment, the axial length of the strip-shaped opening 213 is equal to the axial length of the expansion section 212, so as to further ensure the elasticity of the expansion section 212 and ensure that the expansion section 212 can generate sufficient radial deformation; and the strip-shaped opening 213 is axially parallel to the middle axis of the expansion section 212, so that the expansion section 212 is ensured to deform in the radial direction, and deformation in other directions when the expansion section 212 passes through the mounting hole 61 is avoided.
When the expansion nut 2 passes through the mounting hole 61, the expansion section 212 of the first sleeve 21 abuts against the closed structural member 6, so that one end of the bolt rod 1 is fixed in the mounting hole, and in order to ensure the abutting firmness of the expansion section 212 and the closed structural member 6, the first sleeve 21 is made of stainless steel, and the elastic performance of the expansion section 212 can be ensured due to the fact that the stainless steel has elasticity. In other embodiments, the material of the first sleeve 21 may be high-strength steel. Of course, the material of the first sleeve 21 may not be limited to the above mentioned materials, and other materials with high strength and ductility commonly used in the art are all suitable for the present invention.
Further, the inclination angle of the expansion section 212 is between 2 degrees and 30 degrees, preferably 5 degrees to 10 degrees, and under the inclination angle, and the material of stainless steel is combined, so that the expansion section 212 can be ensured to be deformed properly in the radial direction, an operator can apply proper thrust to enable the expansion nut 2 to pass through the mounting hole 61, and can stably abut against the closed structural member 6 after completely passing through the mounting hole 61, and the firmness of connection between the bolt rod 1 and the mounting hole 61 is ensured. The utility model discloses the inclination of "expansion segment" be the acute angle contained angle between the lateral wall of expansion segment 212 cross section and its axis.
When the expansion nut 2 passes through the mounting hole 61, the connection section 211 enters the mounting hole 61 first, and the expansion sections 212 are guided to pass through in sequence. In order to ensure the guiding function of the connecting section 211, so that the connecting section 211 can smoothly pass through the mounting hole 61, one end of the connecting section 211, which is far away from the expansion section 212, is provided with an arc chamfer 214, and when the arc chamfer 214 passes through the mounting hole 61, the arc chamfer can be smoothly connected with the inner wall of the mounting hole 61, so that the connecting section 211 has a better guiding function and achieves the purpose of quick mounting; moreover, the arc chamfer 214 can also avoid the stress concentration phenomenon of the connecting section 211, and ensure the strength of the connecting section 211.
As shown in fig. 5-11 (the closed structure in fig. 5-10 is a simplified diagram), when using the detachable blind bolt of the present invention, the bolt rod 1 is led with the expansion nut 2 and passed through the mounting hole 61, and then the middle section body 5, the washer 3 and the nut 4 are sequentially sleeved on the bolt rod 1, and the nut is screwed by a wrench by gripping and holding the rest of the bolt rod 1, so as to realize the fastening function of the detachable blind bolt. The axial length of the bolt shank 1 therefore needs to be greater than the sum of the lengths of the expansion nut 2, the washer 3, the intermediate section 5 and the nut 4, so that the bolt shank 1 has an exposed, grippable portion. In this embodiment, bolt pole 1 is solid construction, and the screw rod of blind bolt in comparing prior art has higher intensity, guarantees that can dismantle blind bolt in this embodiment and has better mechanical properties.
When the bolt needs to be disassembled, the nut 4 and the washer 3 are disassembled in sequence, then the bolt rod 1 is pulled by hand to rotate until the expansion nut 2 is unscrewed from the bolt rod 1, the bolt rod is taken out, and finally the middle section body 5 in the mounting hole 61 is taken out. Therefore, the bolt rod 1, the nut 4, the washer 3 and the middle section body 5 can be reused, and the waste of materials is reduced.
Example two:
the difference between this embodiment and the first embodiment is that, as shown in fig. 12-13, the axial length of the second sleeve 22 is the same as the axial length of the connecting section 211, which can save materials, reduce process difficulty, and make the manufacturing cost of the detachable blind bolt lower. It should be noted that, since the second sleeve 22 is fixedly connected to the connecting section 211, there is no clear boundary between the two, the wall thickness of the second sleeve 22 in the present embodiment is the same as that of the second sleeve 22 in the first embodiment, and the method for determining the boundary between the second sleeve 22 and the connecting section 211 is also the same as that in the first embodiment.
It introduces in detail to go on the blind bolt can dismantle above that the utility model provides, to the general technical personnel in this field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this specification content should not be understood as the restriction of the utility model.
Claims (10)
1. The utility model provides an elasticity inflation nut of quick structure, its characterized in that, includes the inflation nut, the inflation nut includes first sleeve and second sleeve, the second sleeve is located first telescopic inside, the telescopic inner wall of second is provided with the internal thread, first sleeve includes linkage segment and inflation section, the linkage segment with second sleeve fixed connection, the internal diameter of inflation section is greater than the telescopic external diameter of second, the inflation section orientation is kept away from the orientation of linkage segment, extend the setting from the inner circle is leaned out, the circumference equipartition has a plurality of bar openings on the inflation section.
2. The quick configurable elastic expansion nut of claim 1, wherein the axial length of said first sleeve is greater than or equal to the axial length of the second sleeve; alternatively, the length of the second sleeve is equal to the axial length of the connecting section.
3. Rapidly configurable elastic expansion nut according to claim 1, characterized in that said strip-shaped openings are 4-6 in number.
4. Rapidly building elastic expansion nut according to claim 1, characterized in that the inclination of said expansion segment is 2 ° -30 °.
5. The quick configurable elastic expansion nut of claim 1, wherein said first sleeve is made of a stainless steel material; or the first sleeve is made of high-strength steel.
6. The quick configurable elastic expansion nut of claim 1, wherein said connecting section has a radiused chamfer at an end distal from said expansion section.
7. The quick configurable elastic expansion nut of claim 1, wherein said strip shaped opening has an axial length equal to the axial length of said expansion section and is parallel to the central axis of the expansion section.
8. A detachable blind bolt comprising a rapidly configurable elastic expansion nut as claimed in any one of claims 1 to 7 and a bolt shank, the bolt shank having its outer circumference successively sleeved with a washer and a nut, the expansion nut abutting one end of a mounting hole and the washer abutting the other end of the mounting hole.
9. The removable blind bolt of claim 8, wherein the bolt shaft is further sleeved with an intermediate section body, and the intermediate section body is located in a gap formed between the mounting hole and the bolt shaft.
10. The removable blind bolt of claim 8, wherein the bolt shank is of solid construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220239181.3U CN217207201U (en) | 2022-01-28 | 2022-01-28 | Elastic expansion nut with rapid structure and detachable blind bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220239181.3U CN217207201U (en) | 2022-01-28 | 2022-01-28 | Elastic expansion nut with rapid structure and detachable blind bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217207201U true CN217207201U (en) | 2022-08-16 |
Family
ID=82795141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220239181.3U Active CN217207201U (en) | 2022-01-28 | 2022-01-28 | Elastic expansion nut with rapid structure and detachable blind bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217207201U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114582A1 (en) * | 2022-11-29 | 2024-06-06 | 香港理工大学 | Installation auxiliary tool for blind bolts, installation kit and use method therefor |
-
2022
- 2022-01-28 CN CN202220239181.3U patent/CN217207201U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114582A1 (en) * | 2022-11-29 | 2024-06-06 | 香港理工大学 | Installation auxiliary tool for blind bolts, installation kit and use method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217207201U (en) | Elastic expansion nut with rapid structure and detachable blind bolt | |
| CN103671447B (en) | A kind of split Nested-type single-side bolt fastener | |
| CN108571510B (en) | Turnover type unilateral bolt fastener | |
| CN108571505B (en) | Deformation shrinkage self-recovery split type unilateral bolt fastener with round corners | |
| CN103541982A (en) | Nested-type single-side bolt fastener | |
| CN104454866A (en) | Torsional shear type unilateral self-tightening bolt fastener | |
| CN210178729U (en) | Bolt and nut assembly capable of preventing loosening | |
| CN112894718B (en) | A rubber circle appurtenance for split type gasket | |
| CN110936327B (en) | Thimble position adjustable unilateral bolt fastener mounting tool | |
| CN110219869A (en) | A kind of end bracing type unilateral bolt fastener | |
| CN108547844A (en) | A kind of segmented unilateral bolt fastener | |
| US11692576B2 (en) | Single groove single-sided fastener and installation method thereof | |
| CN110259795B (en) | Torsional shear type end extrusion type unilateral bolt fastener | |
| CN208565183U (en) | Dismountable expansion bolt | |
| CN208764081U (en) | A kind of guide rail slidingtype unilateral bolt fastener | |
| CN108775321B (en) | Guide rail sliding type unilateral bolt fastener and use method thereof | |
| CN207848153U (en) | A kind of anti-slip bolt | |
| JP2006132161A (en) | Construction method for steel pipe and column joint structure, mounting tool, and bolt clamping fitting | |
| RU170896U1 (en) | Device for assembling a nodal connection of bar structures | |
| CN210423328U (en) | Unilateral fastening bolt | |
| CN215285204U (en) | Fastening device for insulating layer and hull structure of LNG transport ship | |
| RU196461U1 (en) | ANCHOR DEVICE WITH PIN AND SPIKE FOR FIXING PRELIMINARY TENSIONED COMPOSITE REINFORCED RODS | |
| JP2006153050A (en) | Fastening fitting for connecting rod and tool for cutting its screw part | |
| CN204284139U (en) | The monolateral self-locking bolt fastening piece of a kind of torque-shear type | |
| CN213575088U (en) | Stainless steel screw fastener |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |