CN219492814U - Expansion self-locking screw structure - Google Patents
Expansion self-locking screw structure Download PDFInfo
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- CN219492814U CN219492814U CN202320852432.XU CN202320852432U CN219492814U CN 219492814 U CN219492814 U CN 219492814U CN 202320852432 U CN202320852432 U CN 202320852432U CN 219492814 U CN219492814 U CN 219492814U
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Abstract
The utility model discloses an expansion self-locking screw structure which comprises a screw body, a plug body and an auxiliary abutting locking structure, wherein the interior of the screw body is of a hollow design, an internal thread is arranged in the screw body, an external thread is arranged outside the screw body, a plurality of expansion cracks are transversely formed in the periphery of the screw body, the length of each expansion crack is smaller than that of the screw body, each expansion crack extends to one end of the screw body, a hexagonal screw head A is arranged at the other end of the screw body, the plug body is of a column shape, and a hexagonal screw head B is arranged at one end of the plug body. The auxiliary abutting locking structure is additionally arranged on the basis of the expansion self-locking screw, so that the relative fixing effect between the screw main body and the plug main body of the expansion self-locking screw structure and the fastening object is effectively improved, the integral fastening effect is effectively improved, the loosening probability is reduced, and the practicability is higher.
Description
Technical Field
The utility model relates to the technical field of fixed screws, in particular to an expansion self-locking screw structure.
Background
The screw is a locking piece, and can be matched with the nut to combine a plurality of components into a component, and the component can be assembled and disassembled conveniently; traditional screw is fixed mainly through threaded connection, can not produce not hard up to the vibration of different frequencies in some sports type mechanical device, can't carry out high strength's fixed, can't be applicable to in some special devices. Therefore, the utility model now presents some expansion self-locking screw structures which have good fixing effect, high stability and convenient disassembly, as follows.
Through retrieval, the patent with the publication number of CN215805683U discloses an expansion self-locking screw structure, which comprises a screw and a plug, wherein the inner surface of the screw is provided with an internal thread, the plug is provided with a first external thread matched with the internal thread, the screw is provided with an expansion crack on the side surface along the length direction, the diameter of the first external thread is gradually increased along the direction away from the internal thread, the minimum diameter of the first external thread is not larger than the diameter of the internal thread in a non-expansion state, and the maximum diameter of the first external thread is larger than the diameter of the internal thread in a non-expansion state; the first external thread of the plug is equivalent to a conical thread, and the screw is extruded in the process of screwing in the internal thread, so that the width of the expansion crack is increased, and the plug and the screw are tightly pressed to play a role in preventing loosening; under the dual action of threaded connection and expansion extrusion force, the screw is self-locking, and the screw has the characteristics of good fixing effect, high stability and convenient disassembly.
However, the above patent also has the following optimizations:
the locking principle of the screw and plug combination for fixing two objects is that the two objects are fastened by the pressure generated by the enlarged diameter of the expanded screw, but the fixing position of the two objects is not provided with a limiting abutting fastening structure, so that the relative fixing mode between the screw and plug and the two objects to be fastened is single, the possibility of looseness is high, and the practicability is general.
Disclosure of Invention
The utility model aims to provide an expansion self-locking screw structure, which aims to solve the problems that the locking principle of screw and plug combination of the two self-locking screw structure for fixing two objects is that the two objects are fastened by the pressure generated by the diameter enlargement of the screw after expansion, and the fixing position of the two objects is not provided with a limiting abutting fastening structure, so that the relative fixing mode between the screw and plug and the two objects to be fastened is single, the probability of looseness is higher, and the practicability is general.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an inflation auto-lock screw structure, includes screw main part, end cap main part and supplementary butt locking structure, the inside of screw main part is hollow design, the inside of screw main part is equipped with the internal thread, the outside of screw main part is equipped with the external screw thread, a plurality of inflation cracks have transversely been seted up to screw main part's department all around, the cracked length of inflation is less than screw main part's length, inflation crack extends to screw main part's one end department, screw main part's other end department is equipped with hexagonal screw head A, end cap main part is the cylindricality, end cap main part's one end department is equipped with hexagonal screw head B, end cap main part's outside is equipped with the external screw thread, end cap main part is close to the diameter of hexagonal screw head B and is greater than the diameter of its other end, just end cap main part's diameter is the design of progressively increasing in proper order from one end to the other end, the inside diameter of end cap main part that end cap main part is great is greater than screw main part, supplementary butt locking structure installs in hexagonal screw head B in one side that is close to the main part, and the outside of end cap main part contact with the outside of end cap main part and the locking structure is not located.
Preferably, the number of expansion cracks is four, including but not limited to four, which are of a uniformly distributed design.
Preferably, the size of the hexagonal screw head A is the same as the size of the hexagonal screw head B.
Preferably, the plug main body is a solid cylinder.
Preferably, the auxiliary abutting locking structure comprises a threaded cylinder, a hexagonal screw head C and an abutting cylinder, wherein the threaded cylinder is positioned at one side of the hexagonal screw head B and is integrally formed with the hexagonal screw head B, external threads are arranged outside the threaded cylinder, the hexagonal screw head C is sleeved at the outer part of the threaded cylinder through threaded connection, and the abutting cylinder is positioned at one side of the hexagonal screw head C far away from the hexagonal screw head B and is integrally formed with the hexagonal screw head C.
Preferably, the size of the hexagonal screw head C is the same as the size of the hexagonal screw head B.
The utility model provides an expansion self-locking screw structure, which has the following beneficial effects:
according to the utility model, the screw main body, the plug main body and the auxiliary abutting locking structure are arranged, so that when the screw main body is used, the two objects to be fastened can be subjected to preliminary pressure locking through the combination of the screw main body and the plug main body, the screw main body can also be subjected to self-locking treatment, then the hexagonal screw head A at the upper screw main body is matched through the auxiliary abutting locking structure, the abutting limiting locking of the two objects to be fastened is formed, the relative fixing effect between the screw main body and the plug main body and the two objects to be fastened is effectively improved, the double locking fixing effect is achieved, the integral locking fixing effect is effectively improved, the loosening probability of a fastener is reduced, and the practicability is higher.
Drawings
FIG. 1 is a schematic view of the whole structure of a screw body according to the present utility model;
FIG. 2 is a schematic diagram of the overall structure of the plug body of the present utility model;
FIG. 3 is a schematic view of the internal sectional structure of the plug body of the present utility model;
FIG. 4 is a schematic side view of the screw body of the present utility model;
fig. 5 is a schematic view of a combination locking structure of the present utility model.
In the figure: 1. a screw body; 2. a plug main body; 3. expanding the crack; 4. hexagonal screw head A; 5. hexagonal screw head B; 6. a thread cylinder; 7. hexagonal screw head C; 8. and abutting against the cylinder.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1-5, the present utility model provides a technical solution: the utility model provides an inflation auto-lock screw structure, includes screw main part 1, end cap main part 2 and supplementary butt locking structure, the inside of screw main part 1 is hollow design, the inside of screw main part 1 is equipped with the internal thread, the outside of screw main part 1 is equipped with the external thread, a plurality of inflation cracks 3 have transversely been seted up to screw main part 1 department all around, the length of inflation crack 3 is less than the length of screw main part 1, inflation crack 3 extends to screw main part 1's one end department, screw main part 1's other end department is equipped with hexagonal spiral shell head A4, end cap main part 2 is the cylindricality, end cap main part 2's one end department is equipped with hexagonal spiral shell head B5, end cap main part 2's outside is equipped with the external thread, end cap main part 2 is close to hexagonal spiral shell head B5's one end diameter is greater than the diameter of its other end, just end that end cap main part 2 is the diameter from one end to the other end is the design of progressively increasing gradually, end cap main part 2's smaller one end diameter is less than screw main part 1, end main part 2's diameter is greater than screw main part 1's inside diameter, end main part 2 is provided with hexagonal spiral shell head A4, end 2 is the cylindricality, end 2 is located in the outside of the supplementary butt locking structure 2 is located 2 and is located in 2 side of end cap 2 is close to the outside 2 to the outside of the side locking structure.
The number of the expansion cracks 3 is four, but not limited to, and the four expansion cracks 3 are uniformly distributed, so that the screw main body 1 can be uniformly opened when the subsequent plug main body 2 is screwed in, and the locking effect is improved;
the size of the hexagonal screw head A4 is the same as that of the hexagonal screw head B5, so that a user can conveniently use a spanner of the same model to rotate the screw body 1 and the plug body 2;
the plug main body 2 is a solid cylinder, so that the rigidity of the plug main body 2 is high, and the plug main body is not easy to break and damage;
the auxiliary abutting locking structure comprises a threaded cylinder 6, a hexagonal screw head C7 and an abutting cylinder 8, wherein the threaded cylinder 6 is positioned at one side of the hexagonal screw head B5 and is integrally formed with the hexagonal screw head B5, external threads are arranged outside the threaded cylinder 6, the hexagonal screw head C7 is sleeved outside the threaded cylinder 6 through threaded connection, and the abutting cylinder 8 is positioned at one side of the hexagonal screw head C7 far away from the hexagonal screw head B5 and is integrally formed with the hexagonal screw head C7, so that the hexagonal screw head C7 can be moved at the threaded cylinder 6 through rotation, and the abutting cylinder 8 is driven to move;
the size of the hexagonal screw head C7 is the same as that of the hexagonal screw head B5, so that a user can conveniently use the same type spanner to rotate the hexagonal screw head C7.
Working principle: when the screw body 1 is used, the screw body 1 can movably penetrate or thread through the fixed hole sites of two objects to be fastened, the inner side of the hexagonal screw head A4 is attached to one of the objects to be fastened, at the moment, the hexagonal screw head B5 is screwed into the plug body 2, the plug body 2 is matched with a plurality of expansion cracks 3 to prop up the screw body 1, the diameter of the screw body 1 is increased, pressure butt joint is formed at the fixed hole sites of the two objects to be fastened, the purpose of primary locking of the two objects and the screw body 1 is achieved, then the hexagonal screw head C7 is rotated to drive the butt barrel 8 to move until the butt barrel 8 is attached to the other object to be fastened, the hexagonal screw head A4 can be matched for limiting butt locking treatment of the two objects to be fastened, the relative fixing effect between the screw body 1 and the plug body 2 and the two objects to be fastened is improved, double locking fixation is formed, the probability of screw loosening is further effectively reduced, and the practicability is high.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an inflation auto-lock screw structure, includes screw main part (1), end cap main part (2) and supplementary butt locking structure, its characterized in that: the screw comprises a screw body (1), wherein the inside of the screw body (1) is hollow, an internal thread is arranged in the screw body (1), an external thread is arranged outside the screw body (1), a plurality of expansion cracks (3) are transversely formed in the periphery of the screw body (1), the length of each expansion crack (3) is smaller than that of the screw body (1), the expansion cracks (3) extend to one end of the screw body (1), a hexagonal screw head A (4) is arranged at the other end of the screw body (1), the screw body (2) is cylindrical, a hexagonal screw head B (5) is arranged at one end of the screw body (2), an external thread is arranged outside the screw body (2), the diameter of one end of the screw body (2) close to the hexagonal screw head B (5) is larger than that of the other end of the screw body, the diameter of the screw body (2) is designed gradually increasing from one end to the other end, the diameter of the smaller end of the screw body (2) is smaller than that of the screw body (1), the screw body (2) is larger than that of the screw body (2) is close to one side of the screw body (2) which is close to the screw body (5), and the auxiliary abutting locking structure is positioned at the outer part of the plug main body (2) and is not in contact with the plug main body (2).
2. An expansion self-locking screw structure according to claim 1, wherein: the number of expansion cracks (3) is four, including but not limited to four, and the four expansion cracks (3) are in a uniformly distributed design.
3. An expansion self-locking screw structure according to claim 1, wherein: the size of the hexagonal screw head A (4) is the same as that of the hexagonal screw head B (5).
4. An expansion self-locking screw structure according to claim 1, wherein: the plug main body (2) is a solid cylinder.
5. An expansion self-locking screw structure according to claim 1, wherein: the auxiliary butt locking structure comprises a thread cylinder (6), a hexagonal screw head C (7) and a butt cylinder (8), wherein the thread cylinder (6) is located at one side of the hexagonal screw head B (5) and is integrally formed with the hexagonal screw head B, external threads are arranged on the outside of the thread cylinder (6), the hexagonal screw head C (7) is sleeved on the outside of the thread cylinder (6) through threaded connection, and the butt cylinder (8) is located at one side of the hexagonal screw head C (7) far away from the hexagonal screw head B (5) and is integrally formed with the hexagonal screw head C (7).
6. The expansion self-locking screw structure according to claim 5, wherein: the size of the hexagonal screw head C (7) is the same as that of the hexagonal screw head B (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320852432.XU CN219492814U (en) | 2023-04-17 | 2023-04-17 | Expansion self-locking screw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320852432.XU CN219492814U (en) | 2023-04-17 | 2023-04-17 | Expansion self-locking screw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219492814U true CN219492814U (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320852432.XU Active CN219492814U (en) | 2023-04-17 | 2023-04-17 | Expansion self-locking screw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219492814U (en) |
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2023
- 2023-04-17 CN CN202320852432.XU patent/CN219492814U/en active Active
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