Outdoor anti-corrosion self-drilling screw

Abstract

The utility model discloses an outdoor anti-corrosion self-drilling screw, and belongs to the technical field of self-drilling screws. An outdoor anti-corrosion self-drilling screw comprises a self-drilling screw rod, a connecting round block is arranged at the top of the self-drilling screw rod, a first sealing rubber ring is arranged at the bottom of the connecting round block, and a connecting plate is clamped in a clamping groove, so that water entering the joint of the self-drilling screw and an installation object can be remarkably reduced; accordingly, corrosion of water to the self-drilling screw rod and the bottom of the connecting round block is avoided, follow-up dismounting and reutilization of the self-drilling screw are better guaranteed, a cross groove used for mounting and dismounting at the top can be sealed and protected through a sealing cover, the problem that the interior of the cross groove is excessively corroded and rusted due to rainwater or moisture is solved, and the service life of the self-drilling screw rod is prolonged. And the connecting plate with the cross-shaped groove can be detached and replaced, so that the self-drilling screw can have higher adaptability and operability when facing various complex use scenes and possible unforeseen circumstances.

Description

Technical Field

[0001] This utility model relates to the field of self-drilling screw technology, and more specifically, to outdoor corrosion-resistant self-drilling screws. Background Technology

[0002] Ordinary screws require drilling and tapping before fastening materials, while self-drilling screws, a recent invention, solve these problems. They allow direct drilling, tapping, and tightening directly onto the material being fastened. Screws are tools that utilize the physical and mathematical principles of inclined planes, circular rotation, and friction to progressively fasten objects and machine parts. Self-drilling screws are screws with a self-tapping drill bit at the front. Screws are a common invention of human production and daily life for thousands of years; in terms of application, they are considered one of humanity's greatest inventions. Drilling screws, also called self-drilling screws, are a recent invention, but ordinary self-drilling screws are relatively laborious, require specific tools, and have significant limitations.

[0003] To address the above issues, application number 201721591557.2, entitled "A Self-Drilling Screw," describes a screw head, a shank, and a drill tail. The screw head is an internal hexagonal head with two symmetrical flat slots on its sidewall. The shank extends downwards from the screw head, has several threads formed on its exterior, and chip removal grooves cut into its surface. The drill tail is connected to the end of the shank. This self-drilling screw has a simple structure, is convenient and labor-saving to use, and eliminates the need for auxiliary tools for drilling and tapping, significantly saving time and costs.

[0004] Although this device has many beneficial effects in practical applications, it still has some prominent problems that cannot be ignored:

[0005] Firstly, the self-drilling screw exhibits poor corrosion resistance when used outdoors. This is primarily due to the complex and variable outdoor environment, which is often affected by various environmental factors, especially in rainy or humid conditions. The device lacks sealing protection for the screw head, making the mounting and disassembly slots and screw connections highly susceptible to moisture erosion, leading to corrosion and rust. Once the slots are corroded, disassembly becomes difficult, causing numerous inconveniences. For example, disassembly may be time-consuming and laborious, or even impossible due to severe rust, affecting equipment maintenance and replacement. Rust at the connection also increases resistance during disassembly, further complicating use.

[0006] Secondly, in actual use, the slot used for installing and removing this self-drilling screw is easily damaged due to incorrect installation or disassembly by personnel. Once the slot is damaged due to human error, it is usually difficult to disassemble it using conventional screwdrivers or other tools, and specialized tools must be used to remove it. This undoubtedly causes great inconvenience in actual use, not only increasing the complexity and cost of operation, but also potentially delaying the work progress.

[0007] In light of this, we propose outdoor corrosion-resistant self-drilling screws. Utility Model Content

[0008] 1. Technical problems to be solved

[0009] The purpose of this invention is to provide outdoor corrosion-resistant self-drilling screws to solve the problems mentioned in the background art.

[0010] 2. Technical Solution

[0011] Outdoor corrosion-resistant self-drilling screws include a self-drilling screw rod with a connecting block at the top and a sealing rubber ring at the bottom. The connecting block has a snap-fit ​​groove at the top and limit holes on both sides of the inner wall of the snap-fit ​​groove. A connecting plate is snapped into the snap-fit ​​groove.

[0012] Preferably, the sealing rubber ring has a circular groove at its bottom, and the size of the multiple circular grooves decreases one by one.

[0013] Preferably, the bottom of the connecting plate is provided with a snap-fit ​​block that matches the snap-fit ​​groove, and the snap-fit ​​block is provided with a movable plate inside.

[0014] Preferably, the sidewalls of the plurality of movable plates are provided with limiting cylinders that match the limiting circular holes, and springs are connected between the plurality of movable plates.

[0015] Preferably, the bottom of the connecting plate is further provided with a sleeve ring, and the inner wall of the sleeve ring is provided with a sleeve sealing ring, which is sleeved on the outer wall of the circumference of the connecting block.

[0016] Preferably, the top of the connecting plate is provided with a cross groove, and the top of the connecting plate is also provided with a connecting ring.

[0017] Preferably, the top of the connecting ring is provided with a sealing snap ring groove, the side wall of the connecting ring is connected to a sealing cover by a pin, and the bottom of the sealing cover is provided with a sealing rubber ring that matches the snap ring groove.

[0018] 3. Beneficial effects

[0019] Compared to existing technologies, the advantages of this invention are as follows: First, the user can open the sealing cover and then use a conventional screwdriver to install the self-drilling screw in the pre-specified position. After the self-drilling screw is installed, its bottom sealing rubber ring will tightly adhere to the surface of the object being installed. At the same time, in conjunction with the multiple circular grooves opened at the bottom, the sealing rubber ring can perform multiple sealing and waterproofing functions. In this way, the amount of water entering the connection between the self-drilling screw and the object being installed can be significantly reduced, thereby avoiding the corrosion of the self-drilling screw rod and the bottom of the connecting block caused by water. This better ensures the subsequent disassembly and reuse of the self-drilling screw. As for the cross groove at the top used for installation and disassembly, a sealing cover can be used for sealing and protection. In this way, the problem of excessive corrosion and rust inside the cross groove caused by rainwater or moisture can be effectively reduced, ensuring the stability of the self-drilling screw during the subsequent disassembly process.

[0020] In practical use, if the cross-shaped groove becomes damaged due to incorrect disassembly or installation, simply press down on the multiple limiting cylinders. The elasticity of the multiple springs will cause the limiting cylinders to retract, thus releasing them from the limiting holes. In this situation, the connecting plate containing the cross-shaped groove can be disassembled and replaced. This allows personnel to continue installation or disassembly operations, effectively reducing the inconvenience caused by using expensive external equipment for disassembly and greatly improving the practicality of self-drilling screws. This makes self-drilling screws more adaptable and operable in various complex usage scenarios and potential unexpected situations, providing strong support for the smooth progress of related work. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall disassembly structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the sealing rubber ring of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the snap-fit ​​block of this utility model;

[0025] The labels in the diagram are as follows: 100, self-drilling screw rod; 200, connecting block; 210, snap-fit ​​groove; 220, limiting hole; 230, sealing rubber ring one; 231, annular groove; 300, connecting plate; 310, sleeve ring; 320, sleeve sealing ring; 330, snap-fit ​​block; 331, movable plate; 332, limiting cylinder; 333, spring; 340, cross groove; 350, connecting ring; 360, sealing cap; 370, sealing rubber ring two. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please see Figure 1-4 This utility model provides a technical solution:

[0030] The outdoor corrosion-resistant self-drilling screw includes a self-drilling screw rod 100, a connecting block 200 at the top of the self-drilling screw rod 100, a sealing rubber ring 230 at the bottom of the connecting block 200, a snap-fit ​​groove 210 at the top of the connecting block 200, limit holes 220 on both sides of the inner wall of the snap-fit ​​groove 210, and a connecting plate 300 snapped into the inside of the snap-fit ​​groove 210.

[0031] Specifically, the bottom of the sealing rubber ring 230 is provided with an annular groove 231, and the size of the multiple annular grooves 231 decreases one by one.

[0032] In some embodiments, the progressively decreasing size of the multiple annular grooves 231 serves to create a multi-layered seal at the bottom of the sealing rubber ring 230. When the sealing rubber ring 230 is tightly fitted to the surface of the object being installed, the progressively decreasing size of the annular grooves 231 results in sealing contact bands of different diameters at different positions on the sealing rubber ring 230, much like a series of ring-shaped dams. For water to penetrate, it must successively breach these "dams" of different sizes. The sealing portion corresponding to the smaller annular groove 231 can further block a small amount of water that might pass through the larger annular groove 231, increasing the path length and difficulty of water penetration, thereby improving the sealing effect.

[0033] Furthermore, the bottom of the connecting plate 300 is provided with a snap-fit ​​block 330 that matches the snap-fit ​​slot 210, and the snap-fit ​​block 330 is provided with a movable plate 331 inside.

[0034] Furthermore, the side walls of multiple movable plates 331 are provided with limiting cylinders 332 that match the limiting circular holes 220, and springs 333 are connected between the multiple movable plates 331 to facilitate the disassembly of the connecting plate containing the cross groove 340, thereby reducing the possibility of damage to the cross groove 340 and the inability to remove the self-drilling screw.

[0035] Furthermore, the bottom of the connecting plate 300 is also provided with a sleeve ring 310, and the inner wall of the sleeve ring 310 is provided with a sleeve sealing ring 320, which is sleeved on the outer circumference of the connecting block 200.

[0036] In some embodiments, the sleeve sealing ring 320 is used to prevent moisture from seeping into the snap-fit ​​groove 210 and causing corrosion and rust on the snap-fit ​​block 330 or the internal spring 333.

[0037] It is worth noting that the top of the connecting plate 300 is provided with a cross groove 340, and the top of the connecting plate 300 is also provided with a connecting ring 350.

[0038] It is worth noting that the top of the connecting ring 350 is provided with a sealing snap ring groove, and the side wall of the connecting ring 350 is connected to a sealing cover 360 by a pin. The bottom of the sealing cover 360 is provided with a sealing rubber ring 370 that matches the snap ring groove, so that the sealing cover 360 can be used to seal and protect the cross groove 340.

[0039] In some embodiments, the outer wall of the self-drilling screw is provided with a Dacromet coating. Dacromet coating is a new type of surface anti-corrosion treatment technology. It is a coating mainly composed of zinc powder, aluminum powder, chromic acid and deionized water. The coating is formed on the screw surface through processes such as dip coating, spin drying and sintering. The anti-corrosion mechanism of Dacromet coating is mainly based on the sacrificial anode protection effect of zinc powder and aluminum powder, as well as the physical barrier effect of the coating itself, which further enhances the corrosion resistance of the self-drilling screw.

[0040] Working principle: First, the user can open the sealing cover 360 degrees, and then use a regular screwdriver to install the self-drilling screw in the pre-designated position. After the self-drilling screw is installed, its bottom sealing rubber ring 230 will tightly fit against the surface of the object being installed. At the same time, in conjunction with the multiple circular grooves 231 opened at the bottom, the sealing rubber ring 230 can perform multiple sealing and waterproofing functions. In this way, the amount of water entering the connection between the self-drilling screw and the object being installed can be significantly reduced, thereby avoiding corrosion of the self-drilling screw rod 100 and the bottom of the connecting block 200 caused by water, and better ensuring the subsequent disassembly and reuse of the self-drilling screw. As for the cross groove at the top used for installation and disassembly, a sealing cover can be used for sealing and protection. In this way, rainwater or... To address the issue of excessive corrosion and rust inside the cross-shaped groove caused by moisture, and to ensure the stability of the self-drilling screw during disassembly, in actual use, if the cross-shaped groove is damaged due to incorrect disassembly or installation by personnel and cannot be used normally, simply press multiple limiting cylinders 332. At this time, with the elastic action of multiple springs 333, the limiting cylinders 332 will retract accordingly, thereby breaking free from the limiting constraint of the limiting hole 220. In this case, the connecting plate 300 containing the cross-shaped groove 340 can be disassembled and replaced. In this way, personnel can continue to carry out installation or disassembly operations, making the self-drilling screw more adaptable and operable in the face of various complex usage scenarios and possible unexpected situations, providing a strong guarantee for the smooth progress of related work.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An outdoor corrosion-resistant self-drilling screw, including a self-drilling screw rod (100), characterized in that: The self-drilling screw rod (100) is provided with a connecting block (200) at the top, and a sealing rubber ring (230) is provided at the bottom of the connecting block (200). A snap-fit ​​groove (210) is provided at the top of the connecting block (200), and limit holes (220) are provided on both sides of the inner wall of the snap-fit ​​groove (210). A connecting plate (300) is snapped into the inside of the snap-fit ​​groove (210).

2. The outdoor corrosion-resistant self-drilling screw according to claim 1, characterized in that: The bottom of the sealing rubber ring (230) is provided with an annular groove (231), and the size of the multiple annular grooves (231) decreases one by one.

3. The outdoor corrosion-resistant self-drilling screw according to claim 2, characterized in that: The bottom of the connecting plate (300) is provided with a snap-fit ​​block (330) that matches the snap-fit ​​groove (210), and the snap-fit ​​block (330) is provided with a movable plate (331) inside.

4. The outdoor corrosion-resistant self-drilling screw according to claim 3, characterized in that: The sidewalls of the multiple movable plates (331) are provided with limiting cylinders (332) that match the limiting circular holes (220), and springs (333) are connected between the multiple movable plates (331).

5. The outdoor corrosion-resistant self-drilling screw according to claim 4, characterized in that: The bottom of the connecting plate (300) is also provided with a sleeve ring (310), and the inner wall of the sleeve ring (310) is provided with a sleeve sealing ring (320), which is sleeved on the outer circumference of the connecting block (200).

6. The outdoor corrosion-resistant self-drilling screw according to claim 5, characterized in that: The top of the connecting plate (300) is provided with a cross groove (340), and the top of the connecting plate (300) is also provided with a connecting ring (350).

7. The outdoor corrosion-resistant self-drilling screw according to claim 6, characterized in that: The top of the connecting ring (350) is provided with a sealing snap ring groove, and the side wall of the connecting ring (350) is connected to a sealing cover (360) by a pin. The bottom of the sealing cover (360) is provided with a sealing rubber ring (370) that matches the snap ring groove.

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