CN215634230U - Self-locking high-strength expansion bolt - Google Patents
Self-locking high-strength expansion bolt Download PDFInfo
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- CN215634230U CN215634230U CN202122352659.1U CN202122352659U CN215634230U CN 215634230 U CN215634230 U CN 215634230U CN 202122352659 U CN202122352659 U CN 202122352659U CN 215634230 U CN215634230 U CN 215634230U
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- 241000251468 Actinopterygii Species 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model provides a self-locking high-strength expansion bolt which comprises a countersunk head bolt, a first expansion sleeve, a thrust sleeve and a plurality of second expansion sleeves, wherein the countersunk head bolt is fixedly arranged on the first expansion sleeve; a countersunk head bolt, one end of which is provided with a conical head; the first expansion sleeve is a non-closed pipe, a plurality of first expansion bulges are uniformly distributed on the outer wall of the first expansion sleeve along the circumference, one end of the first expansion sleeve, which is connected with the conical head on the countersunk head bolt, is a first expansion end, and the other end of the first expansion sleeve is a second expansion end; the thrust sleeve is sleeved on the countersunk head bolt, a plurality of second expansion bulges are uniformly distributed on the outer wall of the thrust sleeve along the circumference, and one end of the thrust sleeve is provided with a first conical section; the second expansion sleeves are positioned between the first expansion sleeve and the thrust sleeve, and a plurality of third expansion bulges are uniformly distributed on the outer wall of each second expansion sleeve along the circumference; each second expansion casing is a non-closed pipe, one end of the second expansion casing is provided with a second conical section, and the other end of the second expansion casing is a third expansion end.
Description
Technical Field
The utility model belongs to the technical field of fasteners, and particularly relates to a self-locking high-strength expansion bolt.
Background
The existing expansion bolt mainly comprises a countersunk head bolt, an expansion pipe, a flat washer, a spring pad and a fastening nut, wherein the large end of the countersunk head bolt is conical, and one end of the expansion pipe, which is close to the conical shape of a screw rod, is provided with a plurality of longitudinal notches. When the expansion pipe is used, the fastening nut is screwed, and the countersunk head bolt is pressed into the expansion pipe from the small end to the large end to force the expansion pipe to be in conical expansion deformation. On one hand, the existing expansion bolt is only provided with an expansion end at the end part, the contact section of the expansion end and the hole wall is short, the expansion effect is poor, the expansion bolt is easy to loosen or slide in the use process, and the expansion bolt is only suitable for common and conventional occasions with low safety level, such as house decoration or household appliance installation, and is not suitable for fixing large-scale products and key important equipment; on the other hand, in different application scenarios, the expansion pipes required by the expansion bolts are often different, for example, the length of the expansion pipe required by a lighter device is longer when a heavier device is installed, and the length of the expansion pipe is usually determined when the existing expansion bolt leaves a factory, so that the application range of the existing expansion bolt is greatly limited, the manufacturing cost is higher, and the expansion bolt is not beneficial to popularization and application.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a self-locking high-strength expansion bolt, aiming at solving the technical problem.
In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a self-locking high strength expansion bolt comprising:
a countersunk head bolt, one end of which is provided with a conical head;
the first expansion sleeve is sleeved at one end of the countersunk head bolt, provided with the conical head, and is a non-closed pipe, a plurality of first expansion bulges are uniformly distributed on the outer wall of the first expansion sleeve along the circumference, more than two axial openings are uniformly distributed on one end of the first expansion sleeve, which is connected with the conical head on the countersunk head bolt, along the circumference, and are used as a first expansion end, and the other end of the first expansion sleeve is used as a second expansion end;
the thrust sleeve is sleeved on the countersunk head bolt and is positioned outside the first expansion sleeve, a plurality of second expansion bulges are uniformly distributed on the outer wall of the thrust sleeve along the circumference, and a first conical section is arranged at one end of the thrust sleeve;
the second expansion sleeves are sequentially sleeved on the countersunk head bolts and are positioned between the first expansion sleeves and the thrust sleeve, and a plurality of third expansion bulges are uniformly distributed on the outer wall of each second expansion sleeve along the circumference; each second expansion casing is a non-closed pipe, one end of the second expansion casing is provided with a second conical section, and the other end of the second expansion casing is a third expansion end; the inner diameter of the third expanded end is greater than the outer diameter of the small end of the first cone section and less than the outer diameter of the large end of the first cone section, the outer diameter of the small end of the second cone section is less than the inner diameter of the second expanded end of the first expanded casing, and the outer diameter of the large end of the second cone section is greater than the inner diameter of the second expanded end of the first expanded casing.
In a possible implementation manner, the first expansion casing, the plurality of second expansion casings and the thrust casing are all non-closed cylindrical pipes which are formed by punching and forming steel belts at one time.
In one possible implementation, the first expansion lobe, the second expansion lobe, or the third expansion lobe is quadrilateral.
In one possible implementation, the first expansion lobe, the second expansion lobe, or the third expansion lobe is triangular.
In one possible implementation, the first swelling protrusion, the second swelling protrusion, or the third swelling protrusion is in a shape of a fish scale.
In one possible implementation, the first expansion lobe, the second expansion lobe, or the third expansion lobe is trapezoidal.
In one possible implementation, the first expansion lobe, the second expansion lobe, or the third expansion lobe is conical.
In one possible implementation, the first expansion lobe, the second expansion lobe, or the third expansion lobe is barb-shaped.
In a possible implementation manner, the first expansion protrusion, the second expansion protrusion, or the third expansion protrusion is a spherical crown shape, an oblique convex tip, or an oblique convex hull, and the spherical crown shape, the oblique convex tip, and the oblique convex hull are all stretch-formed structures.
In one possible implementation, the second expansion end of the first expansion sleeve and the third expansion end of the second expansion sleeves are provided with a plurality of serrated teeth.
The self-locking high-strength expansion bolt provided by the utility model has the beneficial effects that: compared with the prior art, the self-locking high-strength expansion bolt provided by the utility model is provided with the first expansion sleeve, the plurality of second expansion sleeves and the thrust sleeve, on one hand, when the self-locking high-strength expansion bolt is used, the thrust sleeve enables the first conical section on the thrust sleeve to be embedded into the third expansion end on the second expansion sleeve and enables the third expansion end to be expanded under the action of the fastening nut, the adhesion force between the second expansion sleeve and the wall of a drilled hole is increased, the thrust sleeve further extends into the inner cavity of the second expansion sleeve, the second expansion bulge on the thrust sleeve is deeply embedded into the cavity and firmly attached to the inner cavity to form self-locking, the second conical section on the second expansion sleeve is embedded into the third expansion end on the adjacent second expansion sleeve or the second expansion end of the first expansion sleeve and enables the second expansion sleeve to be expanded, the adhesion force between the second expansion sleeve or the first expansion sleeve and the wall of the drilled hole is increased, under the action of the conical head of the countersunk head bolt, the axial opening of the first expansion end on the first expansion sleeve is expanded and moves up to the conical head of the countersunk bolt, and the adhesion force between the expansion sleeve and the wall of the drilled hole is increased, namely, the self-locking high-strength expansion bolt provided by the utility model has the advantages that after being screwed down, at least three expansion ends are tightly attached to the wall of the drilled hole, the contact section between the expansion ends and the wall of the drilled hole is long, the tensioning effect is good, and the connection is more stable; on the other hand, a plurality of second expansion sleeves penetrate between the first expansion sleeve and the thrust sleeve, and the length of the self-locking high-strength expansion bolt can be directly adjusted by increasing or decreasing the number of the second expansion sleeves, so that the self-locking high-strength expansion bolt is suitable for different installation scenes.
Drawings
Fig. 1 is a schematic perspective view of a self-locking high-strength expansion bolt with a second expansion sleeve according to an embodiment of the present invention;
fig. 2 is a schematic front view of a first expansion sleeve, a second expansion sleeve and a thrust sleeve of the self-locking high-strength expansion bolt provided by the embodiment of the utility model;
fig. 3 is a front view of a self-locking high-strength expansion bolt provided with two second expansion sleeves according to an embodiment of the present invention;
description of reference numerals:
10. a countersunk bolt; 11. a conical head; 20. a first expansion casing; 21. a first expansion lobe;
22. a first expansion end; 23. a second expansion end; 24. an axial opening; 30. a thrust sleeve;
31. a second expansion lobe; 32. a first conical section; 40. a second expansion casing;
41. a third expansion lobe; 42. a second cone section; 43. a third expansion end; 50. saw teeth;
60. fastening a nut; 70. and (7) a gasket.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and 3 together, the self-locking high-strength expansion bolt provided by the present invention will now be described. The self-locking high-strength expansion bolt comprises a countersunk bolt 10, a first expansion sleeve 20, a thrust sleeve 30 and a plurality of second expansion sleeves 40; a countersunk head bolt 10, one end of which is provided with a conical head 11; the first expansion sleeve 20 is sleeved at one end of the countersunk head bolt 10, which is provided with the conical head 11, the first expansion sleeve 20 is a non-closed pipe, a plurality of first expansion bulges 21 are uniformly distributed on the outer wall of the first expansion sleeve 20 along the circumference, more than two axial openings 24 are uniformly distributed on the end, connected with the conical head 11 on the countersunk head bolt 10, of the first expansion sleeve 20 along the circumference, the first expansion openings are used as first expansion ends 22, and the second expansion end 23 is arranged at the other end; the thrust sleeve 30 is sleeved on the countersunk head bolt 10 and is positioned outside the first expansion sleeve 20, a plurality of second expansion bulges 31 are uniformly distributed on the outer wall of the thrust sleeve 30 along the circumference, and one end of the thrust sleeve 30 is provided with a first conical section 32; the second expansion sleeves 40 are sequentially sleeved on the countersunk head bolt 10 and are positioned between the first expansion sleeve 20 and the thrust sleeve 30, and a plurality of third expansion bulges 41 are uniformly distributed on the outer wall of each second expansion sleeve 40 along the circumference; each second expansion casing 40 is a non-closed tube provided with a second conical section 42 at one end and a third expansion end 43 at the other end; the third expanded end 43 has an inner diameter greater than the outer diameter of the small end of the first cone section 32 and less than the outer diameter of the large end of the first cone section 32, the second cone section 42 has an outer diameter of the small end less than the inner diameter of the second expanded end 23 of the first expansion sleeve 20, and the second cone section 42 has an outer diameter of the large end greater than the inner diameter of the second expanded end 23 of the first expansion sleeve 20.
It should be noted that the self-locking high-strength expansion bolt further includes a fastening nut 60 and a gasket 70, both of which are sleeved on the countersunk bolt, and when two adjacent second expansion sleeves 40 are connected, the second taper section 42 of one second expansion sleeve 40 is embedded into the third expansion end 43 of the other second expansion sleeve 40; when the bolt is used, the first expansion sleeve 20, one or more second expansion sleeves 40 and the thrust sleeve 30 are sequentially sleeved on the countersunk bolt 10, then, one end with the conical head 11 is inserted into a pre-drilled hole, the fastening nut 60 is continuously rotated, under the action of the tightening force, the first conical section 32 of the thrust sleeve 30 is embedded into the third expansion end 43 of the second expansion sleeve 40, the third expansion end 43 is expanded and embedded into the hole wall, the second conical section 42 of the second expansion sleeve 40 is embedded into the third expansion end 43 of the second expansion sleeve 40 or the second expansion end 23 of the first expansion sleeve 20, the second conical section is expanded and embedded into the hole wall, and the conical head 11 of the countersunk bolt 10 is embedded into the first expansion end 22 of the first expansion sleeve, the first expansion end 22 is expanded and embedded into the hole wall; meanwhile, the number of the second expansion sleeves 40 can be directly increased or decreased according to different use requirements, so that the length of the self-locking high-strength expansion bolt can be adjusted, and the installation requirement can be met.
The self-locking high-strength expansion bolt provided by the utility model has the beneficial effects that: compared with the prior art, the self-locking high-strength expansion bolt provided by the utility model is provided with the first expansion sleeve 20, the plurality of second expansion sleeves 40 and the thrust sleeve 30, wherein the first expansion sleeve 20 and the second expansion sleeve 40 are both non-closed pipes, on one hand, the thrust sleeve 30 enables the first conical section 32 on the thrust sleeve 30 to be embedded into the third expansion end 43 on the second expansion sleeve 40 and enables the third expansion end 43 to expand under the action of the fastening nut 60, the adhesion force of the second expansion sleeve 40 and the wall of a drilled hole is increased, the thrust sleeve further extends into the inner cavity of the second expansion sleeve 40, the second expansion bulge 31 on the thrust sleeve is deeply embedded into the cavity and firmly attached to the inner cavity to form self-locking, the second conical section 42 on the second expansion sleeve 40 is embedded into the third expansion end 43 on the adjacent second expansion sleeve 40 or the second expansion end 23 on the first expansion sleeve 20 and enables the thrust sleeve to expand, the adhesion strength between the second expansion sleeve 40 or the first expansion sleeve 20 and the wall of the borehole is increased, under the action of the conical head 11 of the countersunk head bolt 10, the axial opening 24 of the first expansion end 22 on the first expansion sleeve 20 expands and moves up to the conical head 11 of the countersunk head bolt 10, and the adhesion strength between the expansion sleeve and the wall of the borehole is increased, namely, after being screwed down, at least three expansion ends are tightly attached to the wall of the borehole, the contact section between the expansion ends and the wall of the borehole is long, the tensioning effect is good, and the connection is more stable; on the other hand, a plurality of second expansion sleeves 40 are arranged between the first expansion sleeve 20 and the thrust sleeve 30 in a penetrating mode, and the length of the self-locking high-strength expansion bolt can be directly adjusted by increasing or decreasing the number of the second expansion sleeves 40, so that the self-locking high-strength expansion bolt is suitable for different installation scenes.
In a specific embodiment, the first expansion casing 20, the plurality of second expansion casings 40 and the thrust casing 30 are all non-closed cylindrical pipes which are formed by one-time stamping and forming of steel strips, so that the manufacturing is easier and faster, the production cost is greatly reduced, and the popularization is facilitated.
In a specific embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 is quadrilateral.
It should be understood that the first expansion protrusion 21, the second expansion protrusion 31 and the third expansion protrusion 41 may be all quadrangles, or may be partially quadrangles and have other shapes.
In a particular embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 is triangular.
It is to be understood that the first expansion protrusion 21, the second expansion protrusion 31 and the third expansion protrusion 41 may be all triangular, or may be partially triangular and have other shapes.
In a particular embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 is fish-scale shaped.
It should be understood that the first expansion protrusion 21, the second expansion protrusion 31 and the third expansion protrusion 41 may all be in a fish scale shape, or may be partially in a fish scale shape, and have other shapes.
In a specific embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 has a trapezoidal shape.
It is to be understood that the first expansion protrusion 21, the second expansion protrusion 31 and the third expansion protrusion 41 may all be trapezoidal, or may be partially trapezoidal and have other shapes.
In a particular embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 is conical.
It is to be understood that the first expansion lobe 21, the second expansion lobe 31 and the third expansion lobe 41 may all be conical or the partially conical portion may be other shapes.
In a specific embodiment, the first expansion lobe 21, the second expansion lobe 31, or the third expansion lobe 41 is barb-shaped.
It should be understood that the first expansion lobes 21, the second expansion lobes 31 and the third expansion lobes 41 may all be barb-shaped, or may be partially barb-shaped and partially other shapes.
In a specific embodiment, the first expansion protrusion 21, the second expansion protrusion 31 or the third expansion protrusion 41 is in a shape of a spherical crown, an oblique convex tip or an oblique convex hull, and the spherical crown, the oblique convex tip and the oblique convex hull are all in a stretching forming structure.
It is to be understood that the first expansion lobe 21, the second expansion lobe 31 and the third expansion lobe 41 may all be spherical, oblique convex or convex hull shaped, or may be partially spherical, oblique convex or convex hull shaped.
In a specific embodiment, the second expansion end 23 of the first expansion sleeve 20 and the third expansion end 43 of the second expansion sleeve 40 are provided with a plurality of serrations 50.
It should be understood that the plurality of sawtooth teeth 50 are arranged at the second expansion end 23 and the third expansion end 43, so that when the second expansion end 23 and the third expansion end 43 expand, the sawtooth teeth 50 are embedded into the hole wall of the drill hole, the adhesive force is increased, and the self-locking high-strength expansion bolt is connected more stably.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A self-locking high-strength expansion bolt is characterized by comprising:
a countersunk head bolt, one end of which is provided with a conical head;
the first expansion sleeve is sleeved at one end of the countersunk head bolt, provided with the conical head, and is a non-closed pipe, a plurality of first expansion bulges are uniformly distributed on the outer wall of the first expansion sleeve along the circumference, one end of the first expansion sleeve, which is connected with the conical head on the countersunk head bolt, is a first expansion end, more than two axial openings are uniformly distributed along the circumference, and the other end of the first expansion sleeve is a second expansion end;
the thrust sleeve is sleeved on the countersunk head bolt and is positioned outside the first expansion sleeve, a plurality of second expansion bulges are uniformly distributed on the outer wall of the thrust sleeve along the circumference, and a first conical section is arranged at one end of the thrust sleeve; and
the second expansion sleeves are sequentially sleeved on the countersunk head bolts and are positioned between the first expansion sleeves and the thrust sleeve, and a plurality of third expansion bulges are uniformly distributed on the outer wall of each second expansion sleeve along the circumference; each second expansion casing pipe is a non-closed pipe, one end of each second expansion casing pipe is provided with a second conical section, and the other end of each second expansion casing pipe is a third expansion end; the inner diameter of the third expanded end is greater than the outer diameter of the small end of the first cone section and less than the outer diameter of the large end of the first cone section, the outer diameter of the small end of the second cone section is less than the inner diameter of the second expanded end of the first expanded casing, and the outer diameter of the large end of the second cone section is greater than the inner diameter of the second expanded end of the first expanded casing.
2. The self-locking high-strength expansion bolt according to claim 1, wherein the first expansion sleeve, the plurality of second expansion sleeves and the thrust sleeve are all non-closed cylindrical pipes which are formed by one-time punching or stretching of steel strips.
3. The self-locking high strength expansion bolt of claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is quadrilateral.
4. The self-locking high strength expansion bolt of claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is triangular.
5. The self-locking high strength expansion bolt of claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is fish scale shaped.
6. The self-locking high strength expansion bolt of claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is trapezoidal in shape.
7. The self-locking high strength expansion bolt of claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is conical.
8. The self-locking high strength expansion bolt according to claim 2 wherein said first expansion lobe, said second expansion lobe or said third expansion lobe is barb shaped.
9. The self-locking high-strength expansion bolt according to claim 2, wherein the first expansion bulge, the second expansion bulge or the third expansion bulge is a spherical crown shape, an oblique convex tip or an oblique convex hull, and the spherical crown shape, the oblique convex tip and the oblique convex hull are all in a stretch-formed structure.
10. The self-locking high-strength expansion bolt according to any one of claims 1 to 9, wherein the second expansion end of the first expansion sleeve and the third expansion ends of the second expansion sleeves are provided with a plurality of serrated teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122352659.1U CN215634230U (en) | 2021-09-27 | 2021-09-27 | Self-locking high-strength expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122352659.1U CN215634230U (en) | 2021-09-27 | 2021-09-27 | Self-locking high-strength expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215634230U true CN215634230U (en) | 2022-01-25 |
Family
ID=79932844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122352659.1U Active CN215634230U (en) | 2021-09-27 | 2021-09-27 | Self-locking high-strength expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215634230U (en) |
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2021
- 2021-09-27 CN CN202122352659.1U patent/CN215634230U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220125 Address after: 057150 No. 312, zone 6, Longquan North Street, Liuying Township, Yongnian County, Handan City, Hebei Province Patentee after: Zhao Renxing Address before: 057150 No. 34, zone 4, Hebei Pu entrepreneurship base, Linmingguan Town, Yongnian District, Handan City, Hebei Province Patentee before: Chuanshanci (Handan) Fastener Co.,Ltd. |