Anti-drop rail fastener

Abstract

The utility model relates to fastener technical field especially relates to a kind of anti-falling track fastener, including bolt rod, the one end of bolt rod is welded with bolt head, the surface of the one end of bolt rod away from bolt head is equipped with external thread;The surface of bolt head is slidably sleeved with gasket, nut is also set up on bolt head and is sleeved, the internal thread of nut and external thread are mutually screwed installation;The one end of bolt rod away from bolt head is attached and is provided with anti-falling block, the one side of anti-falling block is welded with threaded column, the end surface of bolt rod away from bolt head is equipped with thread groove, the surface of threaded column and the inside of thread groove are mutually screwed butt joint.This scheme is not completely open by the tail of bolt rod, but is closed by a detachable anti-falling block.Anti-falling block is screwed into the thread groove in the end of bolt rod by threaded column on it, forms a closed annular structure.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a track fastener that prevents slippage. Background Technology

[0002] As an efficient and environmentally friendly mode of public transportation, rail transit has been widely used and developed in recent years. In rail transit systems, the installation and securing of tracks are crucial for ensuring the safe operation of trains.

[0003] As a crucial component connecting the track to the foundation structure, track fasteners directly impact the track's stability and safety. For example, Chinese Patent Publication No. "CN222782872U" discloses a double-ended arc-shaped segment bolt, relating to the field of segment bolt technology. It includes a segment bolt body with a threaded groove on its surface. A washer is placed on the surface of the threaded groove, a nut is threadedly connected to the surface of the threaded groove, a baffle is placed on the surface of the threaded groove, a cover is placed on the surface of the nut, a connecting ring is fixedly connected to the surface of the cover, and a fixing strip is fixedly installed inside the cover. By configuring the segment bolt body, threaded groove, nut, cover, connecting ring, and fixing strip structure, with the fixing strip located inside the cover, the six sets of fixing strips correspond precisely to the six sides of the nut. During installation, they fit snugly against the nut's surface, allowing the entire cover to seal the nut and threaded groove, effectively preventing moisture from the air from adhering to the nut's surface, preventing bolt rust, and thus improving the overall service life of the bolt.

[0004] During track installation, the selection and use of fasteners are crucial. Common track fasteners include bolts, nuts, and washers, among which U-bolts are the most widely used. Due to their unique shape and structure, U-bolts can provide strong fastening force and stability, and are widely used in railway tracks, subway tracks, mining tracks, and other scenarios. Traditionally, U-bolts rely mainly on the cooperation between the bolt and nut to achieve fastening when preventing them from coming loose. Although this fastening method is simple and easy to implement, in the long-term use, due to the vibration and impact generated by train operation, the friction between the bolt and nut will gradually decrease, resulting in a decrease in fastening force, and the bolt is prone to loosening or even falling off. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned shortcomings in the existing technology by proposing an anti-detachment track fastener.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a track fastener to prevent detachment, including a bolt rod, one end of which is welded and fixed with a bolt head, and the surface of the bolt rod away from the bolt head is provided with external threads; A washer is slidably fitted onto the surface of the bolt head, and a nut is also fitted onto the bolt head, with the internal and external threads of the nut being threaded together. An anti-loosening block is fitted to the end of the bolt shank away from the bolt head. A threaded post is welded and fixed to one side of the anti-loosening block. A threaded groove is opened on the end face of the bolt shank away from the bolt head. The surface of the threaded post and the inside of the threaded groove are threadedly connected to each other.

[0007] Preferably, the bolt rod has an arc-shaped structure.

[0008] Preferably, the gasket has an elliptical structure.

[0009] Preferably, both the bolt head and the anti-loosening block are hexagonal structures.

[0010] Preferably, the anti-detachment block has an end welded and fixed on the side away from the threaded post, and the end has a circular structure.

[0011] Preferably, the end has a built-in groove for screwdriver operation, and the built-in groove is in the shape of a straight line.

[0012] Preferably, a positioning ring is welded and fixed to the end of the bolt head away from the bolt shank, and a positioning bolt is slidably inserted into the inside of the positioning ring.

[0013] The design scheme proposed in this utility model has the following beneficial effects in application: 1. In this design, the tail of the bolt shank is not completely open, but rather sealed by a detachable anti-loosening block. The anti-loosening block is screwed into the threaded groove at the end of the bolt shank via its threaded post, forming a closed ring structure. 2. This solution utilizes an arc-shaped bolt rod design, allowing for closer contact with the curved contour of the track after insertion into the mounting hole, increasing the stress-bearing area and thus enhancing the tightening strength. Secondly, the elliptical structure of the shim is more adaptable to the special surface of the track than traditional circular shims, effectively reducing the gap between the shim and the track, resulting in a more uniform distribution of clamping force and further enhancing anti-slip and anti-loosening performance. Attached Figure Description

[0014] Figure 1 This is a front view of the disassembled overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model after disassembly; Figure 3 This is a schematic diagram of the bolt column and anti-detachment block structure of this utility model; Figure 4 This is a schematic diagram of the gasket shape of this utility model.

[0015] In the diagram: 1. Bolt rod; 11. Bolt head; 12. External thread; 13. Washer; 14. Nut; 15. Threaded post; 16. Anti-loosening block; 17. Threaded groove; 2. End; 21. Internal groove; 3. Locating ring; 31. Locating bolt. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A track fastener for preventing detachment includes a bolt rod 1, one end of which is welded and fixed with a bolt head 11, and the surface of the end of the bolt rod 1 away from the bolt head 11 is provided with an external thread 12. The bolt rod 1 and the bolt head 11 can be inserted into and mated with the track. A washer 13 is slidably fitted onto the surface of the bolt head 11. A nut 14 is also fitted onto the bolt head 11. The internal thread of the nut 14 and the external thread 12 are threaded together. The washer 13 can play an anti-slip role when the nut 14 and the external thread 12 are threaded together and the track is locked. An anti-loosening block 16 is fitted to the end of the bolt rod 1 away from the bolt head 11. A threaded post 15 is welded and fixed to one side of the anti-loosening block 16. A threaded groove 17 is opened on the end face of the bolt rod 1 away from the bolt head 11. The surface of the threaded post 15 and the inside of the threaded groove 17 are threaded together. After the threaded post 15 and the threaded groove 17 are threaded together, the anti-loosening block 16 can close and limit the tail of the bolt rod 1, so that the nut 14 will not easily separate from the bolt rod 1.

[0018] Among them, bolt rod 1 has an arc-shaped structure. The arc shape can increase the contact area with the track when inserted, thereby improving the track's anti-fall-off effect.

[0019] Among them, the gasket 13 has an elliptical structure, and the elliptical shape allows for better fit with the track.

[0020] Both the bolt head 11 and the anti-loosening block 16 are hexagonal structures, which can be easily operated with a wrench.

[0021] Among them, the anti-detachment block 16 has an end head 2 welded and fixed on the side away from the threaded post 15. The end head 2 has a circular structure and is an external structure. The circular design avoids affecting the operation of the anti-detachment block 16.

[0022] The end 2 has a built-in groove 21 for screwdriver operation. The built-in groove 21 is in the shape of a flathead screw. By inserting a flathead screw into the built-in groove 21, the threaded post 15 and the anti-disengagement block 16 can be rotated.

[0023] The bolt head 11 is welded and fixed to a positioning ring 3 at the end away from the bolt rod 1. A positioning bolt 31 is slidably inserted into the positioning ring 3. The positioning ring 3 can play a transitional connection role. The positioning bolt 31 passes through the positioning ring 3 and is fixed to the external position, which can prevent the bolt rod 1 from moving freely after it is installed with the track.

[0024] Working method: The bolt rod 1 of this solution adopts an arc-shaped structure design. This arc shape can significantly increase the contact area with the track, thereby improving the overall anti-loosening effect. During the installation process, after the bolt rod 1 is inserted into the track, the external thread 12 on its surface and the internal thread of the nut 14 cooperate with each other to achieve fastening through threaded installation. The washer 13 slides on the surface of the bolt head 11. When the nut 14 is threadedly assembled with the external thread 12, the washer 13 is pressed between the track and the nut 14, which plays an anti-slip role and prevents the nut 14 from loosening due to vibration or load. The washer 13 is designed with an elliptical structure. This shape can better fit the track surface and enhance the fit and stability. In addition, the bolt head 11 has a hexagonal structure, which is convenient to operate with a wrench and ensures the convenience of installation and disassembly. Throughout the process, the arc-shaped design of the bolt rod 1 not only optimizes the contact area, but also improves the overall strength and durability of the fastener, ensuring that the track maintains a stable connection under dynamic load. The anti-loosening block 16 is threadedly connected to the threaded groove 17 on the end face of the bolt rod 1 away from the bolt head 11 by a threaded post 15 welded and fixed on one side, thereby achieving a closed limit on the tail of the bolt rod 1. This design ensures that the nut 14 will not easily come off after being threadedly installed with the bolt rod 1, thus improving the safety and reliability of the fastener. The anti-loosening block 16 also adopts a hexagonal structure, which is easy to rotate with a wrench to precisely control the mating depth of the threaded post 15 and the threaded groove 17. An end head 2 is welded and fixed on the side of the anti-loosening block 16 away from the threaded post 15. The end head 2 has a circular structure. This external design avoids interference with the operation of the anti-loosening block 16. At the same time, the built-in groove 21 on the end head 2 is in the shape of a flathead screwdriver, which allows for rotation by inserting a flathead screwdriver, further simplifying the installation and adjustment process. Through this double locking mechanism, the anti-loosening block 16 not only prevents the nut 14 from loosening, but also enhances the anti-loosening ability of the entire fastener in the vibration or impact environment, ensuring the long-term stability of the track connection. A positioning ring 3 is welded and fixed to the end of the bolt head 11 away from the bolt rod 1. A positioning bolt 31 is slidably inserted inside the positioning ring 3, which serves as a transition connection and additional fixation. The design of the positioning ring 3 allows the positioning bolt 31 to pass through its interior and be fixed to the external point, thereby preventing the bolt rod 1 from moving or shifting freely after it is installed with the track. This fixing mechanism enhances the overall rigidity and vibration resistance of the fastener through the connection between the positioning bolt 31 and the external structure. At the same time, the arc-shaped structure of the bolt rod 1, the elliptical design of the washer 13, and the closed limit of the anti-detachment block 16 work together to ensure that the track remains tightly connected under dynamic load. The introduction of the positioning ring 3 and the positioning bolt 31 further optimizes the installation accuracy and reduces the risk of loosening caused by external factors, thereby improving the safety and service life of the track system. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A track fastener for preventing detachment, comprising a bolt rod (1), characterized in that: One end of the bolt rod (1) is welded and fixed with a bolt head (11), and the surface of the bolt rod (1) away from the bolt head (11) is provided with an external thread (12). A washer (13) is slidably fitted onto the surface of the bolt head (11), and a nut (14) is also fitted onto the bolt head (11), with the internal thread and external thread (12) of the nut (14) being threaded together. An anti-loosening block (16) is attached to one end of the bolt rod (1) away from the bolt head (11). A threaded column (15) is welded and fixed on one side of the anti-loosening block (16). A threaded groove (17) is opened on the end face of the bolt rod (1) away from the bolt head (11). The surface of the threaded column (15) and the inside of the threaded groove (17) are threadedly connected to each other.

2. The anti-detachment track fastener according to claim 1, characterized in that: The bolt rod (1) has an arc-shaped structure.

3. The anti-detachment track fastener according to claim 2, characterized in that: The gasket (13) has an elliptical structure.

4. The anti-detachment track fastener according to claim 3, characterized in that: Both the bolt head (11) and the anti-loosening block (16) are hexagonal structures.

5. The anti-detachment track fastener according to claim 4, characterized in that: The anti-detachment block (16) has an end (2) welded and fixed on the side away from the threaded post (15), and the end (2) has a circular structure.

6. The anti-detachment track fastener according to claim 5, characterized in that: The end (2) is provided with a built-in groove (21) for screwdriver operation, and the built-in groove (21) is in the shape of a straight line.

7. The anti-detachment track fastener according to claim 6, characterized in that: A positioning ring (3) is welded and fixed to the end of the bolt head (11) away from the bolt rod (1), and a positioning bolt (31) is slidably inserted inside the positioning ring (3).

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