CN220302515U - Screw with double-layer thread structure - Google Patents
Screw with double-layer thread structure Download PDFInfo
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- CN220302515U CN220302515U CN202321893875.XU CN202321893875U CN220302515U CN 220302515 U CN220302515 U CN 220302515U CN 202321893875 U CN202321893875 U CN 202321893875U CN 220302515 U CN220302515 U CN 220302515U
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- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000011324 bead Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of fasteners and discloses a screw with a double-layer thread structure, which comprises a first stud and a first screw head fixedly arranged above the first stud, wherein a second screw assembly is arranged on the first stud, the second screw assembly comprises a second stud and a second screw head fixedly arranged above the second stud, the diameter of the second screw head is larger than that of the second stud, a stepped hole matched with the second stud and the second screw head is formed in the first stud, the second stud and the second screw head are positioned in the stepped hole, the second screw head is connected with the first screw head through a limiting assembly when the second stud is in a standby state, and the bottom wall of the second screw head is fixedly connected with the stepped surface of the stepped hole when the second stud is in a locking state. The utility model has the beneficial effect of avoiding the locking of the internal cavity of the part, and solves the problem of interference with the internal cavity of the part and breaking of the cavity caused by the locking of the traditional screw with fixed diameter and length.
Description
Technical Field
The utility model relates to the technical field of fasteners, in particular to a screw with a double-layer thread structure.
Background
The screw is a tool for fastening the parts of the device step by utilizing the physical and mathematical principles of the inclined circular rotation and friction force of the object. Screws are a common expression for fasteners, a daily spoken word. Screws are an indispensable industrial necessity in daily life.
The screw is often used for fixed connection between the mechanical parts, at fixed part in-process, sometimes can need great locking force to fix the spare part, consequently need adopt thicker longer screw to guarantee the stability after the connection, but partial part is inside to be offered the cavity, when the fixed traditional screw locking of diameter and length can lead to appearing with the inside cavity interference of part, leads to breaking the problem emergence of cavity.
Disclosure of Invention
The present utility model is directed to a screw with a double-layered thread structure, which solves the problems set forth in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: screw with bilayer thread structure, including first double-screw bolt, fixed first spiral shell head that sets up in first double-screw bolt top, its characterized in that: the first screw bolt is provided with a second screw bolt assembly, the second screw bolt assembly comprises a second screw bolt and a second screw bolt fixedly arranged above the second screw bolt, the diameter of the second screw bolt is larger than that of the second screw bolt, the first screw bolt is provided with a stepped hole matched with the second screw bolt and the second screw bolt, the second screw bolt and the second screw bolt are positioned in the stepped hole, the second screw bolt is connected with the first screw bolt through a limiting assembly when in a standby state, and the bottom wall of the second screw bolt is fixedly connected with the stepped surface of the stepped hole when in a locking state.
Preferably, the limiting assembly comprises an elastic piece and limiting beads fixedly arranged at the left end and the right end of the elastic piece, a telescopic hole is formed in the second screw head, the elastic piece is located in the telescopic hole, the limiting beads extend out of the telescopic hole, a limiting groove is formed in the side wall of the stepped hole, and the limiting beads are inserted into the limiting groove to be in abutting connection with the first screw head when the second screw is in a standby state.
Preferably, the second screw assembly further comprises an elastic washer, the elastic washer is located in the stepped hole, the bottom wall of the elastic washer is fixedly connected with the stepped surface of the stepped hole, and the bottom wall of the second screw head is fixedly connected with the top wall of the elastic washer when the second stud is in a locking state.
Preferably, the second screw assembly further comprises a plug, the diameter of the plug is larger than that of the second screw head, a plug hole which is matched with the plug and communicated with the stepped hole is formed in the top wall of the first screw head, and the plug is inserted into the plug hole to be fixedly connected with the first screw head through threads.
Preferably, a cross groove is formed in the top wall of the second screw head.
Preferably, the first screw head is a hexagonal screw head.
Preferably, a hexagonal groove is formed in the top wall of the plug.
The utility model has the beneficial effects that: when a part to be locked and a part (called a cavity part for short) with a cavity inside are required to be locked, firstly, a step screw hole avoiding the cavity is formed in the cavity part, a through hole corresponding to the step screw hole is formed in the part to be locked, then a first stud is aligned with the through hole and the step screw hole, the first stud is inserted into the through hole and the step screw hole, the first stud is rotated to drive the first stud to rotate so as to be screwed into a first section screw hole of the step screw hole, and the part to be locked and the cavity part are fixed, so that the first-step locking is completed; the first stud is provided with a stepped hole matched with the second stud and the second screw head, the second stud and the second screw head are positioned in the stepped hole, a locking tool stretches into the stepped hole to rotate the second screw head, the second screw head drives the second stud to rotate so as to be screwed into a second section of screw hole of the stepped screw hole, the bottom wall of the second screw head is fixedly connected with a stepped surface of the stepped hole, so that the first stud is locked to prevent loosening, the stability of the first stud is ensured, and a part to be locked and a cavity part are further fixed, namely the second step of locking is completed; in summary, the utility model has the beneficial effect of avoiding the locking of the internal cavity of the part, and solves the problem of interference with the internal cavity of the part and breaking of the cavity caused by the locking of the traditional screw with fixed diameter and length.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the extended configuration of the present utility model;
FIG. 3 is a schematic diagram of an explosive structure of the present utility model;
FIG. 4 is a cross-sectional view of the present utility model;
FIG. 5 is a cross-sectional view of the utility model in an extended state;
fig. 6 is a schematic diagram of the practical application of the present utility model.
In the figure: the novel anti-lock device comprises a first stud 1, a first screw head 2, a second stud 3, a second screw head 4, a stepped hole 5, a stepped surface 6, an elastic piece 7, a limiting bead 8, a telescopic hole 9, a limiting groove 10, an elastic gasket 11, a plug 12, a plug hole 13, a cross groove 14, a hexagonal groove 15, a part to be locked 16 and a cavity part 17.
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. 1-6, the utility model discloses a screw with a double-layer thread structure, which comprises a first stud 1 and a first screw head 2 fixedly arranged above the first stud 1, wherein a second screw assembly is arranged on the first stud 1, the second screw assembly comprises a second stud 3 and a second screw head 4 fixedly arranged above the second stud 3, the diameter of the second screw head 4 is larger than that of the second stud 3, a stepped hole 5 matched with the second stud 3 and the second screw head 4 is formed in the first stud 1, the second stud 3 and the second screw head 4 are positioned in the stepped hole 5, the second screw head 4 is connected with the first screw head 2 through a limiting assembly when the second stud 3 is in a standby state, and the bottom wall of the second screw head 4 is fixedly connected with a stepped surface 6 of the stepped hole 5 when the second stud 3 is in a locking state. When the part to be locked 16 and a part (called as a cavity part 17 for short) with a cavity inside are required to be locked, firstly, a step screw hole avoiding the cavity is formed in the cavity part 17, a through hole corresponding to the step screw hole is formed in the part to be locked 16, then a first stud 1 is aligned with the through hole and the step screw hole, the first stud 1 is inserted into the through hole and the step screw hole, the first stud 1 is driven by the first screw head 2 to rotate so as to be screwed into a first section screw hole of the step screw hole, and the part to be locked 16 and the cavity part 17 are fixed, so that the first step locking is completed; because the first stud 1 is provided with the stepped hole 5 matched with the second stud 3 and the second screw head 4, the second stud 3 and the second screw head 4 are positioned in the stepped hole 5, a locking tool stretches into the stepped hole 5 to rotate the second screw head 4, the second screw head 4 drives the second stud 3 to rotate so as to be screwed into a second section of screw hole of the stepped screw hole, the bottom wall of the second screw head 4 is fixedly connected with the stepped surface 6 of the stepped hole 5, so that the first stud 1 is locked to prevent loosening, the stability of the first stud is ensured, and the part 16 to be locked and the cavity part 17 are further fixed, namely the second step of locking is completed; in summary, the utility model has the beneficial effect of avoiding the locking of the internal cavity of the part, and solves the problem of interference with the internal cavity of the part and breaking of the cavity caused by the locking of the traditional screw with fixed diameter and length.
Preferably, the spacing subassembly includes elastic component 7, fixed spacing pearl 8 that sets up both ends about elastic component 7, set up telescopic hole 9 on the second spiral shell head 4, elastic component 7 is located telescopic hole 9 and makes spacing pearl 8 stretch out in telescopic hole 9 outside, set up spacing groove 10 on the shoulder hole 5 lateral wall, spacing pearl 8 inserts spacing groove 10 and is connected with first spiral shell head 2 conflict when second double-screw bolt 3 is in the state of being used. Because the elastic piece 7 is positioned in the telescopic hole 9 and enables the limit bead 8 to extend out of the telescopic hole 9, the side wall of the stepped hole 5 is provided with the limit groove 10, when the second stud 3 is in a standby state, the second stud 3 is pushed into the stepped hole 5, and the limit bead 8 can be inserted into the limit groove 10 to be in abutting connection with the first stud 2, so that the effect of preventing the second stud 3 from sliding randomly during standby and the effect of reducing occupied space are achieved.
Preferably, the second screw assembly further comprises an elastic washer 11, the elastic washer 11 is located in the stepped hole 5, the bottom wall of the elastic washer 11 is fixedly connected with the stepped surface 6 of the stepped hole 5, and the bottom wall of the second screw head 4 is fixedly connected with the top wall of the elastic washer 11 when the second stud 3 is in a locking state. Because the bottom wall of the elastic washer 11 is fixedly connected with the step surface 6 of the step hole 5, the bottom wall of the second screw head 4 is fixedly connected with the top wall of the elastic washer 11 when the second stud 3 is in a locking state, and the functions of tight connection and abrasion prevention are achieved.
Preferably, the second screw assembly further comprises a plug 12, the diameter of the plug 12 is larger than that of the second screw head 4, a plug hole 13 matched with the plug 12 and communicated with the stepped hole 5 is formed in the top wall of the first screw head 2, and the plug 12 is inserted into the plug hole 13 to be fixedly connected with the first screw head 2 in a threaded manner. Because the top wall of the first screw head 2 is provided with the plug hole 13 which is matched with the plug 12 and is communicated with the stepped hole 5, when the second stud 3 is in a locking state, the plug 12 is inserted into the plug hole 13 to be fixedly connected with the screw thread of the first screw head 2, so that the effect of preventing external impurities from entering the stepped hole 5 and protecting the second screw head 4 and the second stud 3 is achieved.
Preferably, a cross groove 14 is formed on the top wall of the second screw head 4. Because the top wall of the second screw head 4 is provided with the cross groove 14, the locking tool is convenient to use to rotate the second screw head 4.
Preferably, the first screw head 2 is a hexagonal screw head. Because the first screw head 2 is a hexagonal screw head, the function of conveniently rotating the first screw head 2 is achieved.
Preferably, a hexagonal groove 15 is formed on the top wall of the plug 12. The hexagonal groove 15 is formed in the top wall of the plug 12, so that the plug 12 can be conveniently screwed and unscrewed.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. Screw with bilayer thread structure, including first double-screw bolt (1), fixed first spiral shell head (2) that set up in first double-screw bolt (1) top, its characterized in that: be equipped with second screw subassembly on first double-screw bolt (1), second screw subassembly includes second double-screw bolt (3), the fixed second spiral shell head (4) that set up in second double-screw bolt (3) top, the diameter of second spiral shell head (4) is greater than second double-screw bolt (3), offered on first double-screw bolt (1) with second double-screw bolt (3) and second spiral shell head (4) assorted shoulder hole (5), second double-screw bolt (3) and second spiral shell head (4) are located shoulder hole (5), second spiral shell head (4) are connected with first spiral shell head (2) through spacing subassembly when second double-screw bolt (3) are in the state of being used, the diapire of second spiral shell head (4) is in shoulder face (6) fixed connection of shoulder hole (5) when second double-screw bolt (3) are in the state.
2. A screw provided with a double-layered thread structure according to claim 1, characterized in that: limiting component includes elastic component (7), fixed spacing pearl (8) that set up both ends about elastic component (7), set up on second spiral shell head (4) flexible hole (9), elastic component (7) are located flexible hole (9) and make spacing pearl (8) stretch out in flexible hole (9) outside, spacing groove (10) have been seted up on step hole (5) lateral wall, spacing pearl (8) insert spacing groove (10) are contradicted with first spiral shell head (2) and are connected when second double-screw bolt (3) are in the state of being used.
3. A screw provided with a double-layered thread structure according to claim 2, characterized in that: the second screw assembly further comprises an elastic gasket (11), the elastic gasket (11) is located in the stepped hole (5), the bottom wall of the elastic gasket (11) is fixedly connected with the stepped surface (6) of the stepped hole (5), and the bottom wall of the second screw head (4) is fixedly connected with the top wall of the elastic gasket (11) when the second stud (3) is in a locking state.
4. A screw provided with a double-layered thread structure according to claim 3, characterized in that: the second screw assembly further comprises a plug (12), the diameter of the plug (12) is larger than that of the second screw head (4), a plug hole (13) which is matched with the plug (12) and communicated with the stepped hole (5) is formed in the top wall of the first screw head (2), and the plug (12) is inserted into the plug hole (13) to be fixedly connected with the first screw head (2) through threads.
5. A screw provided with a double-layered thread structure according to claim 4, characterized in that: the top wall of the second screw head (4) is provided with a cross groove (14).
6. A screw provided with a double-layered thread structure according to claim 5, characterized in that: the first screw head (2) is a hexagonal screw head.
7. A screw provided with a double-layered thread structure according to claim 6, characterized in that: a hexagonal groove (15) is formed in the top wall of the plug (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321893875.XU CN220302515U (en) | 2023-07-18 | 2023-07-18 | Screw with double-layer thread structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321893875.XU CN220302515U (en) | 2023-07-18 | 2023-07-18 | Screw with double-layer thread structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220302515U true CN220302515U (en) | 2024-01-05 |
Family
ID=89350896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321893875.XU Active CN220302515U (en) | 2023-07-18 | 2023-07-18 | Screw with double-layer thread structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220302515U (en) |
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2023
- 2023-07-18 CN CN202321893875.XU patent/CN220302515U/en active Active
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