Self-tapping screw for fastening steel-wood composite structure
By using the fastening mechanism and support components of self-tapping screws, the problem of loose connections in traditional screw connections is solved, achieving a stable connection and precise positioning of the steel-wood composite structure, improving the stability and reliability of the structure, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520887580.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-07
AI Technical Summary
Traditional screws are prone to loose connections after fixing, which can cause the steel-wood composite structure to loosen, making it unable to withstand the design load and posing a risk of collapse. Furthermore, loose connections can cause vibration and displacement during equipment operation, affecting the accuracy of normal equipment operation.
Featuring a self-tapping screw design, including a fastening mechanism and support components, the spring-driven support arm automatically adjusts support and rotation, providing strong reverse resistance. Combined with limit blocks and inserts, it prevents screws from loosening, ensuring a secure connection and precise positioning.
It improves the stability and reliability of steel-wood composite structures, reduces maintenance needs caused by loosening, lowers maintenance costs and time, and ensures that the structure maintains a precise relative position under various external forces.
Smart Images
Figure CN223953032U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw technical field especially relates to a steel wood composite structure fastening is with self -tapping screw. BACKGROUND
[0002] Steel wood composite structure fastening is with self -tapping screw, it is used for connecting the screw of two different material components of steel and wood, it need not pre -drilling, can directly spin into material, greatly promotes installation efficiency, in steel wood composite structure, the screw bears the key fastening effect, and the steel component and wooden component are firmly connected, ensure the stability and reliability of whole structure, and is widely used in the field of building, furniture manufacturing etc.
[0003] Traditional screw is fixed in the use process after appearing the situation of connection not closely, and the collaborative stress ability between components drops, and the overall structure is easy to deform and shake, and the steel wood composite structure in building cannot bear the design load due to the loosening of the connecting part, and there is a collapse risk, from the functional point of view, the loosening of the connecting part when the equipment is running can cause vibration and displacement, and affect the normal operation accuracy of the equipment. UTILITY MODEL CONTENTS
[0004] The utility model discloses a steel wood composite structure fastening is with self -tapping screw, can solve the situation of connection not closely in the use process after traditional screw is fixed, and the collaborative stress ability between components drops, and the overall structure is easy to deform and shake, and the steel wood composite structure in building cannot bear the design load due to the loosening of the connecting part, and there is a collapse risk, from the functional point of view, the loosening of the connecting part when the equipment is running can cause vibration and displacement, and affect the normal operation accuracy of the equipment.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a steel wood composite structure fastening is with self -tapping screw, including screw body, still including the fastening mechanism of setting up in screw body one side, the fastening mechanism includes connecting groove and the support subassembly for further limiting screw body, the connecting groove annular is set up in the inside of the end of screw body, the support subassembly sets up in the inside of connecting groove, one side of screw body sets up limit component.
[0006] As a preferred implementation, the support assembly includes a support arm, a plurality of support arms are rotatably connected to the inner side of the connecting groove, a limit rod is movably connected to the inside of the screw body, two limit grooves are formed at the end of the limit rod, a protruding structure is provided on one side of the support arm, and the protruding structure on one side of the support arm is arranged in the inner side of the limit groove.
[0007] As a preferred implementation form, the bottom end of the screw body is provided with a spring, and the two ends of the spring are fixedly connected with the outer side of one end of the limiting rod and the inner side of one end of the screw body respectively.
[0008] As a preferred implementation form, the inner side of one end of the limiting rod is provided with a slot.
[0009] As a preferred implementation form, the side of the supporting arm is provided with an inclined structure, and the side of the supporting arm is fixedly connected with a friction plate.
[0010] As a preferred implementation form, the limiting assembly comprises a limiting block, and the limiting block is annularly fixedly connected to the side of the screw body.
[0011] As a preferred implementation form, the side of the screw body is fixedly connected with a first insertion ring and a second insertion ring.
[0012] As a preferred implementation form, the side of the limiting block, the first insertion ring and the second insertion ring is provided with a sharp structure.
[0013] Compared with the prior art, the utility model has the advantages and positive effects that:
[0014] 1、The utility model discloses, when using, through fastening mechanism, when screw body rotates into specified position, spring releases elastic potential energy, and spring elastic potential energy drives supporting arm, and the actual state of screw body is automatically adjusted to support and rotate, guarantees fastening and closely fits, and the force is appropriate, and the connection is firm, and once loosening, the supporting arm inclined structure combines the friction plate, provides strong reverse resistance, prevents screw body from separating, maintains long -term stable operation of structure, can adapt to different material of screw body, the aperture changes, whether it is conventional building or special steel wood structure, can perfect adaptation, widens the use range, and long -term stable characteristics greatly reduce the maintenance demand caused by loosening etc., reduces the later maintenance cost and time cost.
[0015] 2、The utility model discloses, when using, through the toothed structure limiting block of one side of screw body, can after screw body rotates and inserts into specified position, closely inserts into the inside contact surface, forms strong lock, greatly prevents screw body from reverse rotation, guarantees that the connecting part keeps the given position in long -term use, avoids the structure loosening or failure due to accidental torsion, and the first insertion ring and the second insertion ring of annular structure are inserted into the specified position by the sharp structure of one side, and the screw body is firmly fixed like anchor, effectively prevents it from left and right shaking and shifting, and this accurate positioning function ensures that the steel wood composite structure can still maintain the accurate relative position between parts under various external forces, and the stability and reliability of the overall structure are improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 A main view structural schematic diagram of a self-tapping screw for fastening a steel-wood composite structure is provided in the utility model;
[0017] Figure 2 A structure schematic diagram of a first inserting ring and a second inserting ring in the self-tapping screw for fastening the steel-wood composite structure is provided in the utility model;
[0018] Figure 3 A sectional view of a screw body in the self-tapping screw for fastening the steel-wood composite structure is provided in the utility model;
[0019] Figure 4 A structure schematic diagram of a supporting arm and a limiting rod in the self-tapping screw for fastening the steel-wood composite structure is provided in the utility model.
[0020] Legend:
[0021] 1, screw body;
[0022] 2, fastening mechanism; 21, connecting groove; 22, supporting arm; 23, limiting rod; 24, limiting groove; 25, spring; 26, inserting groove; 27, friction plate; 28, limiting block; 29, first inserting ring; 210, second inserting ring. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0024] Please refer to Figure 1 - Figure 4The utility model provides a technical scheme: a steel wood composite structure fastening is with self -tapping screw, including screw body 1, still including the fastening mechanism 2 of setting in screw body 1 one side, fastening mechanism 2 includes connecting groove 21 and is used for the support subassembly of further limiting of screw body 1, connecting groove 21 annularly offers in the inside of the end of screw body 1, support subassembly sets up in the inside of connecting groove 21, one side of screw body 1 is provided with limiting assembly, support subassembly includes support arm 22, and multiple sets of support arm 22 are rotatably connected in the inside of connecting groove 21, the inside movable joint of screw body 1 is limited rod 23, and the end of limiting rod 23 is provided with two sets of limiting slot 24, and one side of support arm 22 is provided with protruding structure, and the inside of limiting slot 24 is provided with protruding structure one side of support arm 22, and the inside of the bottom end of screw body 1 is provided with spring 25, and the both ends outside of spring 25 are fixedly connected with the one end outside of limiting rod 23, the one end inside of limiting rod 23, and the one end inside of screw body 1 respectively, and the one end inside of limiting rod 23 is provided with insertion slot 26, and one side of support arm 22 is provided with inclined structure, and the one side fixedly connected of support arm 22 has friction plate 27.
[0025] When the user uses the device, the screwdriver can be placed against one side of the screw body 1, at this time the screwdriver is inserted into the insertion slot 26 on the side of the limiting rod 23, thereby driving the limiting rod 23 to be inserted into the inside of the screw body 1, and at the same time the spring 25 is compressed, at this time the limiting rod 23 moves while the limiting slot 24 on the outside of the limiting rod 23 drives the support arm 22 to rotate to a certain extent, that is, the support arm 22 is rotated to the inside of the connecting groove 21, when the screw body 1 is rotated to the specified position, the user removes the screwdriver from one side of the screw body 1, at this time the spring 25 releases the elastic potential energy and drives the limiting rod 23 to move towards the outside of the screw body 1, thereby the limiting slot 24 supports the other side of the protruding structure of the support arm 22, and the multiple support arms 22 are supported outward, so that the support arm 22 has a tendency to rotate outward, when the screw body 1 is loose, the support arm 22 continuously supports outward, the inclined structure on one side of the support arm 22 and the friction plate 27 maximize the resistance to the screw body 1, the side of the friction plate 27 is provided with a strip-shaped protrusion for increasing the friction force to prevent it from being separated from the specified position, during installation, through the fastening mechanism 2, when the screw body 1 is rotated to the specified position, the spring 25 releases the elastic potential energy, the spring 25 drives the support arm 22 according to the actual condition of the screw body 1 to automatically adjust the support and rotation, to ensure that the fastening is closely fitted, the force is appropriate, to ensure stable connection, once the screw body 1 is loose, the inclined structure of the support arm 22 combined with the friction plate 27 provides strong reverse resistance to prevent the screw body 1 from being separated, to maintain long-term stable operation of the structure, to adapt to different materials and hole diameters of the screw body 1, whether it is a conventional building or a special steel wood structure, it can be perfectly adapted, to widen the range of use, the long-term stable characteristics greatly reduce the maintenance requirements caused by loosening and other problems, to reduce the later maintenance cost and time cost.
[0026] As Figure 1 - Figure 4 The limiting assembly includes a limiting block 28, which is annularly fixed to one side of the screw body 1. The screw body 1 is fixedly connected with a first ring 29 and a second ring 210 on one side. The limiting block 28, the first ring 29 and the second ring 210 are all provided with sharp structures on one side.
[0027] When the screw body 1 is rotated and inserted into a designated position, the limiting block 28, the first ring 29 and the second ring 210 on one side of the screw body 1 will be inserted into the inside of the contact surface of the designated position. The tooth-shaped limiting block 28 can prevent the screw body 1 from rotating in the opposite direction. Meanwhile, the sharp structures on one side of the first ring 29 and the second ring 210 will be inserted into the designated position. The annular first ring 29 and the second ring 210 can prevent the screw body 1 from shifting left and right, thereby increasing stability. Through the tooth-shaped limiting block 28 on one side of the screw body 1, the screw body 1 can be tightly embedded in the inside of the contact surface after being rotated and inserted into the designated position, thereby forming a strong lock and greatly preventing the screw body 1 from rotating in the opposite direction. This ensures that the connection part maintains the predetermined position during long-term use and avoids structural loosening or failure caused by accidental twisting. The annular first ring 29 and the second ring 210 insert the sharp structures on one side into the designated position, which firmly fixes the screw body 1 like an anchor point and effectively prevents it from shifting left and right. This precise positioning function ensures that the steel-wood composite structure can still maintain the accurate relative position between components under various external forces, thereby improving the stability and reliability of the overall structure.
[0028] Working principle: when the user uses the device, the screwdriver can be inserted into the slot 26 on one side of the limiting rod 23, and then the limiting rod 23 is inserted into the inside of the screw body 1, and the spring 25 is compressed at the same time. At this time, the limiting rod 23 will rotate the support arm 22 to a certain extent through the limiting slot 24 on the outside of the limiting rod 23 while moving, that is, the support arm 22 can be rotated to the inside of the connecting groove 21. When the screw body 1 is rotated to the specified position, the user removes the screwdriver from one side of the screw body 1. At this time, the spring 25 releases the elastic potential energy and pushes the limiting rod 23 to move outward from the screw body 1. In turn, the limiting slot 24 supports the other side of the protrusion of the support arm 22, and the multiple support arms 22 are supported outward, so that the support arm 22 has a tendency to rotate outward. When the screw body 1 is loose, the support arm 22 will continue to support outward, and the inclined structure on one side of the support arm 22 and the friction plate 27 will maximize the resistance to the screw body 1. The friction plate 27 on one side is provided with a strip-shaped protrusion for increasing friction to prevent it from leaving the specified position. In the installation process, through the fastening mechanism 2, when the screw body 1 is rotated into the specified position, the spring 25 releases the elastic potential energy, and the spring 25 drives the support arm 22 to automatically adjust the support and rotation according to the actual condition of the screw body 1, ensuring that the fastening is tightly fitted, the force is appropriate, the connection is stable, and the screw body 1 is once loose. The inclined structure of the support arm 22 combined with the friction plate 27 provides strong reverse resistance to prevent the screw body 1 from leaving and maintain long-term stable operation of the structure. It can adapt to different materials and hole diameters of the screw body 1. Whether it is a conventional building or a special steel-wood structure, it can perfectly adapt to the use range, and the long-term stable characteristics greatly reduce the maintenance requirements caused by loosening and other problems, reduce the maintenance cost and time cost in the later period. When the screw body 1 is rotated and inserted into the specified position, the limiting block 28, the first insertion ring 29 and the second insertion ring 210 on one side of the screw body 1 will be inserted into the inside of the contact surface of the screw body 1. The limiting block 28 with a tooth-shaped structure can prevent the screw body 1 from rotating in the opposite direction, and the sharp structure on one side of the first insertion ring 29 and the second insertion ring 210 will be inserted into the specified position. The first insertion ring 29 and the second insertion ring 210 with an annular structure can prevent the screw body 1 from shifting left and right to increase stability. Through the tooth-shaped limiting block 28 on one side of the screw body 1, it can be tightly embedded in the inside of the contact surface after the screw body 1 is rotated and inserted into the specified position, forming a strong lock to greatly prevent the screw body 1 from rotating in the opposite direction, ensuring that the connection part remains in the specified position during long-term use, avoiding structure loosening or failure caused by accidental twisting. The first insertion ring 29 and the second insertion ring 210 with an annular structure insert the sharp structure on one side into the specified position, which is similar to an anchor to firmly fix the screw body 1, effectively preventing it from shifting left and right. This precise positioning function ensures that the steel-wood composite structure can still maintain the accurate relative position between parts under various external forces, improving the stability and reliability of the overall structure.
[0029] The above is only the preferred embodiment of the present application, and does not limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, which does not deviate from the technical scheme of the present application, still belongs to the protection scope of the present application.
Claims
1. A self-tapping screw for fastening a steel-wood composite structure, comprising a screw body (1), characterized in that: Also include set in the screw body (1) one side of the fastening mechanism (2), the fastening mechanism (2) includes connecting groove (21) and for further limiting screw body (1) support assembly, the connecting groove (21) ring opening in the end of the screw body (1) inside, the support assembly is arranged in the inside of the connecting groove (21), one side of the screw body (1) is provided with limiting assembly.
2. A self-cutting screw for fastening a steel-wood composite structure according to claim 1, characterized in that: The support assembly includes support arm (22), a plurality of groups of support arm (22) rotatingly connected to the inside of the connecting groove (21), the inside of the screw body (1) movably connected with a limiting rod (23), the end of the limiting rod (23) is provided with two groups of limiting slot (24), one side of the support arm (22) is provided with protruding structure, the protruding structure of one side of the support arm (22) is arranged in the inside of the limiting slot (24).
3. The self-tapping screw for fastening a steel-wood composite structure according to claim 2, characterized in that: The inside of the bottom end of the screw body (1) is provided with spring (25), the both ends of the spring (25) are respectively fixedly connected with one end of the limiting rod (23) and one end of the screw body (1).
4. The self-tapping screw for fastening a steel-wood composite structure according to claim 2, wherein: The inside of one end of the limiting rod (23) is provided with a slot (26).
5. The self-tapping screw for fastening a steel-wood composite structure according to claim 4, wherein: One side of the support arm (22) is provided with an inclined structure, and the support arm (22) is fixedly connected with a friction plate (27) on one side.
6. The self-cutting screw for fastening a steel-wood composite structure according to claim 1, wherein: The limiting assembly includes a limiting block (28), and the limiting block (28) is fixedly connected to one side of the screw body (1).
7. The self-tapping screw for fastening a steel-wood composite structure according to claim 6, wherein: One side of the screw body (1) is fixedly connected with a first ring (29) and a second ring (210).
8. The self-cutting screw for fastening a steel-wood composite structure according to claim 7, characterized in that: The limiting block (28), the first ring (29) and the second ring (210) are provided with sharp structure on one side.