Screw assembly with anti-loosening function for cap welding

Abstract

The utility model discloses a cap-shaped welding screw assembly with an anti-loosening function, which relates to the technical field of screw loosening prevention and comprises a screw rod, a tip end arranged at the lower end of the screw rod, a fixing ring fixedly connected to the annular side face of the screw rod, a hexagonal head arranged on the upper surface of the fixing ring, a head arranged in the hexagonal head, a connecting rod arranged on the upper end face of the tip end, and a nut arranged on the connecting rod. The annular side face of the connecting rod is fixedly connected with two limiting strips used for limiting, the lower surface of the head portion is fixedly connected with a connecting ring, the head portion and the connecting ring fixed to the head portion are fixedly connected with the hexagonal head and the connecting rod in a threaded sleeving mode, and compared with single threaded connection, overall double threaded connection greatly increases the contact area and friction force. The situation that force is concentrated at one position during single thread connection is avoided, and when the screw is subjected to vibration or external force, friction force between the two sets of threads needs to be overcome to enable the screw to be loosened, so that the anti-loosening capacity of the screw is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of screw anti-loosening technology, and in particular to a screw assembly with anti-loosening function for cap-shaped welding. Background Technology

[0002] Cap-shaped welded screw assemblies play a crucial role in numerous industrial and everyday applications. They are primarily used to securely connect various components, while the cap-shaped design protects the internal connection structure from external factors such as dust and moisture. In industries like automotive manufacturing, where they are used to connect various engine components, these screw assemblies typically work in conjunction with the following: the connected parts, such as sheet metal or plastic components, whose materials and thicknesses vary depending on the specific application, requiring the screw assembly to be compatible for a stable connection; the welded joint, where a portion of the cap-shaped welded screw assembly is firmly bonded to the connected parts through a welding process, ensuring reliable connection; and washers that distribute the pressure during screw tightening, protecting the surface of the connected parts and providing some degree of anti-loosening protection. Currently, various types of cap-shaped welded screw assemblies are available on the market to achieve a secure connection. Some products use a standard thread design, relying on conventional tightening methods for connection; others use a single anti-loosening structure, such as a simple spring washer, to increase friction and prevent loosening. Additionally, some manufacturers offer screw assemblies with specially treated surfaces to improve their corrosion and wear resistance.

[0003] However, the existing implementation methods described above still have many problems. Regarding the anti-loosening effect, ordinary thread designs and simple spring washers, or other single anti-loosening structures, are insufficient to effectively prevent screw loosening under complex working conditions such as strong vibrations and prolonged dynamic loads. Once loosened, it may lead to connection failure, causing serious safety hazards or equipment malfunctions. Existing products are mostly one-piece designs; when a specific component needs to be replaced due to a problem at the connection, the entire assembly often needs to be disassembled, greatly increasing maintenance and time costs. This application addresses these problems by proposing a novel cap-shaped welding screw assembly with anti-loosening function. The double thread design significantly enhances the anti-loosening effect, and the unique modular design improves overall performance and reliability. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a screw assembly with anti-loosening function for cap-shaped welding. It solves the problem that ordinary thread designs and simple anti-loosening structures such as spring washers are difficult to effectively prevent screws from loosening under complex working conditions such as strong vibration and long-term dynamic loads. Existing products are mostly integrated designs, and when a problem occurs at the connection point and a specific part needs to be replaced, the entire assembly often needs to be disassembled, which greatly increases maintenance and time costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A screw assembly with anti-loosening function for cap-shaped welding includes a screw rod with a pointed tip at its lower end. A retaining ring is fixedly connected to the annular side of the screw rod. A hexagonal head is provided on the upper surface of the retaining ring. A head is provided inside the hexagonal head. A connecting rod is provided on the upper end face of the pointed tip. Two limiting strips for limiting are fixedly connected to the annular side of the connecting rod. A connecting ring is fixedly connected to the lower surface of the head. Two arc-shaped blocks are fixedly connected to the lower surface of the hexagonal head.

[0007] Preferably, the upper surface of the hexagonal head is provided with a threaded groove, and the threaded groove is threadedly connected to the head.

[0008] Preferably, the screw has a circular hole inside, and the connecting rod is movably connected to the circular hole.

[0009] Preferably, the screw has two limiting grooves inside, both of which are connected to the round hole, and the two limiting grooves are respectively engaged with two limiting strips.

[0010] Preferably, the connecting ring is threadedly connected to the upper end of the connecting rod.

[0011] Preferably, the upper surface of the fixing ring has two arc-shaped grooves, and the two arc-shaped grooves are respectively engaged with two arc-shaped blocks.

[0012] Compared with existing technologies, this utility model has the following advantages: The head and the connecting ring fixed thereon are all threadedly connected to the hexagonal head and the connecting rod. The overall double-threaded connection, compared with a single-threaded connection, greatly increases the contact area and friction, avoiding the situation where force is concentrated in one place as in a single-threaded connection. Furthermore, when the screw is subjected to vibration or external force, the friction between the two sets of threads must be overcome before the screw can loosen, which significantly improves the screw's resistance to loosening. During use, by rotating the head upwards with a tool, the connecting ring fixed thereon moves together. The rotation of both will disengage from the threaded connection with the connecting rod and the hexagonal head, opening the limit. At this time, the tip can be disassembled. The tip will move the fixed connecting rod together. The modular design of the tip can be easily disassembled for individual inspection to check for wear, damage, or deformation. If a problem is found with the tip, it can be replaced in time without replacing the entire screw, further saving costs. Attached Figure Description

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is an overall structural diagram of the present invention;

[0015] Figure 2 This is an exploded view of the overall structure of this utility model;

[0016] Figure 3 This is a structural diagram of the connecting rod of this utility model;

[0017] Figure 4 This is a structural diagram of the fixing ring of this utility model.

[0018] Legend: 1. Screw; 2. Tip; 3. Retaining ring; 4. Hexagonal head; 5. Head; 6. Connecting ring; 7. Connecting rod; 8. Limiting strip; 9. Round hole; 10. Limiting groove; 11. Arc block; 12. Arc groove; 13. Threaded groove. Detailed Implementation

[0019] This application provides a cap-shaped welding screw assembly with anti-loosening function, which effectively solves the problem that ordinary thread designs and simple single anti-loosening structures such as spring washers are difficult to effectively prevent screws from loosening under complex working conditions such as strong vibration and long-term dynamic loads. Existing products are mostly integrated designs, and when a problem occurs at the connection point and a specific part needs to be replaced, the entire assembly often needs to be disassembled, which greatly increases maintenance and time costs. This application proposes a brand-new cap-shaped welding screw assembly with anti-loosening function, which significantly enhances the anti-loosening effect through a double thread design, and the unique combination design improves the overall performance and reliability. Example

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the problem that ordinary thread designs and simple spring washers, as well as other single anti-loosening structures, are insufficient to effectively prevent screw loosening under complex working conditions such as strong vibration and long-term dynamic loads. Existing products are mostly one-piece designs, and when a problem occurs at the connection point and a specific component needs to be replaced, the entire assembly often needs to be disassembled, which greatly increases maintenance and time costs. The overall approach is as follows:

[0021] To address the problems existing in the prior art, this utility model provides a screw assembly with anti-loosening function for cap-shaped welding, including a screw 1, a tip 2 at the lower end of the screw 1, a fixing ring 3 fixedly connected to the annular side of the screw 1, a hexagonal head 4 on the upper surface of the fixing ring 3, a head 5 inside the hexagonal head 4, a connecting rod 7 on the upper surface of the tip 2, two limiting strips 8 for limiting the position fixedly connected to the annular side of the connecting rod 7, a connecting ring 6 fixedly connected to the lower surface of the head 5, and two arc-shaped blocks 11 fixedly connected to the lower surface of the hexagonal head 4.

[0022] The upper surface of the hexagonal head 4 is provided with a threaded groove 13, which is threadedly connected to the head 5.

[0023] The screw 1 has a round hole 9 inside, and the connecting rod 7 is movably connected to the round hole 9.

[0024] The screw 1 has two limiting grooves 10 inside, both of which are connected to the round hole 9, and the two limiting grooves 10 are respectively engaged with the two limiting strips 8.

[0025] The connecting ring 6 is threadedly connected to the upper end of the connecting rod 7.

[0026] Two arc-shaped grooves 12 are formed on the upper surface of the fixed ring 3, and the two arc-shaped grooves 12 are respectively engaged with two arc-shaped blocks 11.

[0027] During use, by rotating the head 5 upwards with the tool, the connecting ring 6 fixed thereto moves together. The rotation of the two will disengage from the threaded engagement of the connecting rod 7 and the hexagonal head 4, opening the limit. At this time, the tip 2 can be disassembled. The tip 2 will move together with the fixed connecting rod 7. The modular design of the tip 2 can be easily disassembled for individual inspection to check for wear, damage or deformation. If a problem is found with the tip 2, it can be replaced in time without replacing the entire screw, further saving costs.

[0028] The head 5 and the connecting ring 6 fixed thereon are all threaded together with the hexagonal head 4 and the connecting rod 7. Compared with the single threaded connection, the overall double threaded connection greatly increases the contact area and friction, avoiding the situation where the force is concentrated in one place as in the single threaded connection. Furthermore, when the screw is subjected to vibration or external force, it is necessary to overcome the friction between the two sets of threads before the screw can loosen, which significantly improves the screw's resistance to loosening.

[0029] Among them, screw 1: as the main part of the screw assembly, it is the basis for connecting various components. It is connected to the tip 2 at the bottom, and a fixing ring 3 is set on the annular side. The upper surface has a round hole 9 for cooperating with the connecting rod 7, which plays a key role in supporting and connecting other components.

[0030] Tip 2: Located below screw 1, it is used to penetrate the connected parts during installation, which facilitates the positioning and initial fixing of the screw assembly. In the modular design, it can be disassembled and inspected separately, and problems can be replaced in time, saving costs.

[0031] The retaining ring 3 is fixed on the annular side of the screw 1. The upper surface is provided with a hexagonal head 4, and an arc groove 12 is opened to cooperate with the arc block 11, which plays a role in stabilizing the connection and assisting in positioning, thereby enhancing the structural stability of the entire screw assembly.

[0032] Hexagonal head 4: Set on the upper surface of the fixing ring 3, with a head 5 inside. The upper surface has a threaded groove 13 that is threaded to the head 5 for easy tool operation. The threaded connection with the head 5 and other components achieves double thread fixation and enhances the anti-loosening effect.

[0033] Head 5: Located inside the hexagonal head 4, with a fixed connecting ring 6 on the lower surface. Together with the connecting ring 6, it is threadedly connected to the hexagonal head 4 and the connecting rod 7. The double threaded connection increases friction, improves the screw's resistance to loosening, and can drive the connecting ring 6 to rotate, thus enabling the disassembly of the tip 2.

[0034] Connecting ring 6: Fixed on the lower surface of head 5, threadedly connected to the upper end of connecting rod 7, and together with head 5, participates in double threaded connection to enhance the anti-loosening effect. At the same time, when rotating head 5, it moves with it to realize the disassembly operation of tip 2.

[0035] Connecting rod 7: connects tip 2 and other components, and fixes limit strip 8 on the annular side. It is movably connected to the round hole 9 on screw 1. Through the threaded connection with head 5, connecting ring 6 and hexagonal head 4, it assists in realizing the double threaded fixing and tip 2 disassembly function.

[0036] Limiting strip 8: Fixed on the annular side of the connecting rod 7, it is movably engaged with the limiting groove 10 on the inner wall of the round hole 9 of the screw 1, limiting the rotation angle and axial movement of the connecting rod 7, ensuring the relative position stability of each component during installation and use, and assisting in the stability of the double threaded connection.

[0037] Round hole 9: It is opened on the upper surface of the screw 1 and is movably sleeved with the connecting rod 7 to provide an installation position for the connecting rod 7. The limiting groove 10 on its inner wall cooperates with the limiting strip 8 to limit the connecting rod 7 and ensure the compact and stable structure of the entire screw assembly.

[0038] Limiting groove 10: It is formed on the inner wall of the round hole 9 and is movably engaged with the limiting strip 8 to restrict the movement of the connecting rod 7, so that the connecting rod 7 can move within a specified range, ensuring that the connection of each component is tight, and playing an auxiliary positioning and enhancing stability role in the double threaded connection;

[0039] Arc-shaped block 11: Fixed on the lower surface of hexagonal head 4, it is movably engaged with the arc-shaped groove 12 on the retaining ring 3. While enhancing the connection stability between hexagonal head 4 and retaining ring 3, it also assists in positioning, prevents relative rotation between components, and improves the reliability of the entire screw assembly.

[0040] Arc groove 12: It is formed on the upper surface of the retaining ring 3 and is movably engaged with the arc block 11 on the lower surface of the hexagonal head 4. The arc block 11 restricts the rotation of the hexagonal head 4, enhances the connection strength between the retaining ring 3 and the hexagonal head 4, and ensures the stability of the screw assembly.

[0041] Threaded groove 13: It is formed on the upper surface of the hexagonal head 4 and is threaded to the head 5. It is one of the key structures to achieve double threaded connection, which increases the contact area and friction, and significantly improves the anti-loosening ability of the screw assembly.

[0042] Working principle:

[0043] During use, by rotating the head 5 upwards with a tool, the connecting ring 6 fixed thereto moves together. The rotation of both disengages from the threaded connection between the connecting rod 7 and the hexagonal head 4, opening the limit switch. At this point, the tip 2 can be disassembled. The tip 2 will move together with the fixed connecting rod 7. The modular design of the tip 2 allows for easy disassembly for individual inspection to check for wear, damage, or deformation. If a problem is found with the tip 2, it can be replaced in time without replacing the entire screw, further saving costs. The head 5 and the connecting ring 6 fixed thereto are all threadedly connected to the hexagonal head 4 and the connecting rod 7. Compared with a single threaded connection, the overall double threaded connection greatly increases the contact area and friction, avoiding the situation where the force is concentrated in one place as in a single threaded connection. Furthermore, when the screw is subjected to vibration or external force, the friction between the two sets of threads must be overcome before the screw can loosen, which significantly improves the screw's resistance to loosening.

[0044] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A screw assembly with anti-loosening function for cap-shaped welding, comprising a screw (1), characterized in that: The screw (1) has a pointed tip (2) at its lower end. A fixing ring (3) is fixedly connected to the annular side of the screw (1). A hexagonal head (4) is provided on the upper surface of the fixing ring (3). A head (5) is provided inside the hexagonal head (4). Among them, the upper end face of the tip (2) is provided with a connecting rod (7), and the annular side of the connecting rod (7) is fixedly connected with two limiting strips (8) for limiting. The lower surface of the head (5) is fixedly connected with a connecting ring (6), and the lower surface of the hexagonal head (4) is fixedly connected with two arc-shaped blocks (11).

2. A screw assembly with anti-loosening function for cap-shaped welding as described in claim 1, characterized in that: The upper surface of the hexagonal head (4) is provided with a threaded groove (13); The threaded groove (13) is threadedly connected to the head (5).

3. A screw assembly with anti-loosening function for cap-shaped welding as described in claim 1 or 2, characterized in that: The screw (1) has a round hole (9) inside; The connecting rod (7) is movably connected to the round hole (9).

4. A screw assembly with anti-loosening function for cap-shaped welding as described in claim 3, characterized in that: The screw (1) has two limiting grooves (10) inside, and both limiting grooves (10) are connected to the round hole (9); The two limiting grooves (10) are respectively engaged with the two limiting strips (8).

5. A screw assembly with anti-loosening function for cap-shaped welding as described in claim 1, characterized in that: The connecting ring (6) is threadedly connected to the upper end of the connecting rod (7).

6. A screw assembly with anti-loosening function for cap-shaped welding as described in claim 1, characterized in that: Two arc-shaped grooves (12) are provided on the upper surface of the fixing ring (3); The two arc-shaped grooves (12) are respectively engaged with the two arc-shaped blocks (11).

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