Anti-loosening reinforcing structure for railway track fastener

Abstract

The utility model discloses an anti-loosening reinforcing structure for a railway track fastener, which belongs to the technical field of railway tracks and comprises a sleeper, and a rubber base plate, a mounting plate, an under-rail laminated plate and a rail are sequentially laminated on the top of the sleeper from bottom to top. The device further comprises a first fastening assembly, a second fastening assembly and a reinforcing assembly, the first fastening assembly comprises a first bolt and a first nut mounted at the top end of the first bolt, and the second fastening assembly comprises a second bolt penetrating through the limiting groove of the mounting plate, a second nut mounted at the top end of the second bolt and a gauge block used for abutting against a rail; the reinforcing assembly comprises an installation screw rod, a first reinforcing piece and a second reinforcing piece, the first nut and the second nut are sleeved with the first reinforcing piece and the second reinforcing piece respectively, a plurality of limiting elastic pieces are fixed to the inner wall of each reinforcing piece limiting hole, and the limiting elastic pieces elastically abut against the side walls of the corresponding nuts. The anti-loosening structure for the railway track fastener is reliable in structure, remarkable in anti-loosening effect and convenient and fast to install and maintain.

Description

Technical Field

[0001] This utility model relates to the field of railway track technology, and in particular to an anti-loosening reinforcement structure for railway track fasteners. Background Technology

[0002] Railway tracks are the basic load-bearing structure of railway transportation systems, and their safety and stability are of paramount importance. The track structure consists of rails, sleepers, ballast, and connecting components. Among them, track fasteners are key components that reliably connect the rails to the sleepers. Their main functions are to maintain the correct position and gauge of the rails, prevent the rails from moving longitudinally and laterally relative to the sleepers, and provide sufficient elasticity and clamping force.

[0003] However, railway tracks are exposed to complex dynamic load environments for a long time. When trains run at high speeds, they generate strong and continuous vibrations and impacts. This periodic vibration will act on the entire fastening system, and is especially likely to cause the bolts and nuts to rotate slightly. Over time, the nuts will gradually loosen, leading to the attenuation or even loss of preload.

[0004] To address the issue of nut loosening, existing technologies typically employ methods such as spring washers, double-nut locking, or applying anti-loosening adhesive. However, spring washers offer limited anti-loosening force and may fail under severe and continuous vibration; the double-nut method increases installation complexity and cost; and anti-loosening adhesives suffer from problems such as difficulty in disassembly, poor weather resistance, and inability to be reused. Utility Model Content

[0005] The purpose of this utility model is to develop a railway track fastener anti-loosening structure that is reliable in structure, has a significant anti-loosening effect, and is convenient to install and maintain.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a non-loosening reinforcement structure for railway track fasteners, comprising a sleeper, wherein a rubber pad, a mounting plate, a rail under plate, and a rail are stacked sequentially from bottom to top on the top of the sleeper;

[0007] It also includes a first fastening assembly, a second fastening assembly, and a reinforcement assembly. The first fastening assembly includes a first bolt and a first nut mounted on its top end. The second fastening assembly includes a second bolt passing through the mounting plate limiting groove and a second nut mounted on its top end, as well as a gauge block for abutting against the rail.

[0008] The reinforcement assembly includes a mounting screw and a first reinforcement member and a second reinforcement member respectively sleeved on the outside of the first nut and the second nut. The inner wall of the limiting hole of each reinforcement member is fixed with multiple limiting springs. The limiting springs elastically press against the side wall of the corresponding nut. The mounting screw passes through the side wall of the reinforcement member and the reserved hole of the sleeper to fix the reinforcement member.

[0009] As a further description of the above technical solution: a positioning plate, a first flat washer, and a first insulating washer are sequentially fitted onto the first bolt.

[0010] As a further description of the above technical solution: a second flat washer and a second insulating washer are sequentially fitted onto the second bolt.

[0011] As a further description of the above technical solution: at least six limiting spring pieces are provided circumferentially on the inner wall of the limiting hole of the first and second reinforcing parts, and the diameter of the limiting hole is larger than the outer diameter of the corresponding nut.

[0012] As a further description of the above technical solution: the limiting spring is an arc-shaped sheet made of spring steel, with its free end protruding towards the central axis of the reinforcement.

[0013] As a further description of the above technical solution: the limiting groove of the mounting plate has a T-shaped cross section, and the second bolt is a T-shaped bolt with a head that matches the limiting groove.

[0014] As a further description of the above technical solution: the first bolt is made of high-strength alloy steel, and its lower end is pre-embedded and cured in the sleeper concrete.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. Based on the traditional nut tightening, a secondary locking structure consisting of a reinforcing member and a limiting spring is added. After the nut is tightened, the reinforcing member covers it from the outside, and the internal limiting spring presses tightly against the side wall of the nut, thereby preventing it from loosening.

[0017] 2. After tightening the nuts, simply slip the corresponding reinforcement piece onto the top and secure it with a mounting screw. The operation is simple and intuitive, requiring no special tools or complicated procedures. This design not only reduces the difficulty of installation but also greatly improves the efficiency of daily maintenance and emergency repairs. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the present invention is shown;

[0019] Figure 2 A perspective view of the present invention is shown;

[0020] Figure 3 This utility model is shown Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 A perspective view of the first and second reinforcing components of this utility model is shown.

[0022] Figure 5A perspective view of the mounting plate and the second bolt of this utility model is shown.

[0023] Legend:

[0024] 10. Sleeper; 11. Rubber pad; 12. Mounting plate; 13. Rail underplate; 14. Rail; 15. First bolt; 16. First nut; 17. Second bolt; 18. Second nut; 19. Gauge block; 20. Second reinforcement component; 21. Positioning plate; 22. First flat washer; 23. First insulating washer; 24. Second flat washer; 25. Second insulating washer; 26. Limiting spring; 27. Mounting screw; 28. First reinforcement component. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 This utility model provides a technical solution: a non-loosening reinforcement structure for railway track fasteners, including a sleeper 10, on which a rubber pad 11, a mounting plate 12, a rail under-mount plate 13 and a rail 14 are stacked sequentially from bottom to top on the top of the sleeper 10; the sleeper 10 and the rail 14 are installed together with related components through a first fastening component, a second fastening component and a reinforcement component.

[0027] The first fastening assembly is used to securely anchor the mounting plate 12 to the sleeper 10, forming a solid foundation for the entire track support. Specifically, the sleeper 10 is a concrete sleeper with pre-drilled bolt holes for installation. The first fastening assembly includes a first bolt 15 and a first nut 16. The lower end of the first bolt 15 is embedded in the bolt hole of the sleeper 10, forming an integral fixation with the sleeper 10. The material of the first bolt 15 is preferably high-strength alloy steel to withstand huge shear and tensile forces.

[0028] During installation, the rubber pad 11 is first placed on top of the sleeper 10. The rubber pad 11 has excellent elasticity and mainly serves to dampen shocks, absorb high-frequency vibrations generated when the train passes, and provide electrical insulation. Then, the mounting plate 12 is stacked on top of the rubber pad 11.

[0029] On the first bolt 15, from bottom to top, a positioning plate 21, a first flat washer 22, and a first insulating washer 23 are sequentially fitted. The positioning plate 21 is used to assist in positioning and ensure installation accuracy. The first flat washer 22 is used to increase the force-bearing area, disperse the locking force of the first nut 16, and protect the surface of the lower component from damage. The first insulating washer 23 is used to achieve electrical insulation of the first fastening assembly and prevent stray current leakage. Finally, the first nut 16 is used to tighten the top of the first bolt 15, thereby firmly pressing the rubber pad 11 and the mounting plate 12 onto the sleeper 10.

[0030] The second fastening assembly secures the rail 14 to the gauge block 19 to maintain the standard gauge. Specifically, the second fastening assembly includes a second bolt 17 and a second nut 18. A limiting groove is machined on the mounting plate 12; the limiting groove has a T-shaped cross-section. Figure 5 As shown.

[0031] The second bolt 17 is a T-bolt, the shape of which matches the inner contour of the limiting groove. During installation, the T-head is slid into the limiting groove from one end. One side of the gauge block 19 is in close contact with the top surface of the mounting plate 12. The other side is machined into a bevel that matches the bottom flange of the rail 14. When it is tightened, the bevel can hold the rail 14 in place, effectively preventing the rail 14 from moving.

[0032] During installation, after placing the rail 14 on the underside plate 13, the gauge block 19 is placed in position so that it abuts against the rail 14. At this time, the second bolt 17 passes through the through hole on the gauge block 19. Then, the second flat washer 24 and the second insulating washer 25 are sequentially fitted onto the second bolt 17. Finally, the second nut 18 is tightened. The strong axial locking force is converted into a clamping force on the rail 14 through the gauge block 19, which firmly positions the rail 14.

[0033] The reinforcement component is used to lock the first nut 16 and the second nut 18 a second time to prevent them from loosening due to vibration. Specifically, the reinforcement component includes a first reinforcement member 28 and a second reinforcement member 20. The two have similar structures, both being a U-shaped structure. The first reinforcement member 28 and the second reinforcement member 20 are provided with limiting holes to accommodate the first nut 16 and the second nut 18. The size of the limiting holes is slightly larger than the outer diameter of the corresponding nuts. The reinforcement members are made of metal stamping or injection molding and have sufficient rigidity and strength.

[0034] Multiple limiting spring pieces 26 are evenly distributed and fixed in the circumferential direction on the inner wall of the limiting hole of the first reinforcing member 28 and the second reinforcing member 20. The limiting spring pieces 26 are preferably made of spring steel with high elasticity and fatigue resistance, and their shape is arc-shaped, but can also be V-shaped or finger-shaped.

[0035] After the first nut 16 and the second nut 18 are tightened to the specified torque, the first reinforcement 28 and the second reinforcement 20 are respectively put on the corresponding nuts from directly above. During the insertion process, the side wall of the nut will push open the limiting spring 26, causing it to undergo elastic deformation. After being put on, the spring relies on its own rebound force to press tightly against the outer side wall of the nut.

[0036] In order to fix the reinforcement itself, the mounting screw 27 is passed through the reserved mounting hole on the side wall of the reinforcement and further through the reserved hole of the sleeper 10, thereby fixing the first reinforcement 28 and the second reinforcement 20 to the sleeper 10 so that they cannot rotate.

[0037] 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 locking and reinforcing structure for railway track fasteners, comprising a sleeper (10), characterized in that: The top of the sleeper (10) is provided with a rubber pad (11), a mounting plate (12), a rail under plate (13) and a rail (14) stacked sequentially from bottom to top; It also includes a first fastening assembly, a second fastening assembly, and a reinforcement assembly. The first fastening assembly includes a first bolt (15) and a first nut (16) mounted on its top end. The second fastening assembly includes a second bolt (17) penetrating the limiting groove of the mounting plate (12) and a second nut (18) mounted on its top end, as well as a gauge block (19) for abutting against the rail (14). The reinforcement assembly includes a mounting screw (27) and a first reinforcement member (28) and a second reinforcement member (20) respectively sleeved on the outside of the first nut (16) and the second nut (18). The inner wall of the limiting hole of each reinforcement member is fixed with multiple limiting springs (26). The limiting springs (26) elastically press against the side wall of the corresponding nut. The mounting screw (27) passes through the side wall of the reinforcement member and the reserved hole of the sleeper (10) to fix the reinforcement member.

2. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The first bolt (15) is fitted with a positioning plate (21), a first flat washer (22) and a first insulating washer (23) in sequence.

3. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The second bolt (17) is fitted with a second flat washer (24) and a second insulating washer (25) in sequence.

4. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The first reinforcement member (28) and the second reinforcement member (20) are provided with at least six limiting spring pieces (26) circumferentially on the inner wall of the limiting hole, and the diameter of the limiting hole is larger than the outer diameter of the corresponding nut.

5. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The limiting spring (26) is an arc-shaped piece made of spring steel, with its free end protruding toward the central axis of the reinforcement.

6. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The mounting plate (12) has a T-shaped groove, and the second bolt (17) is a T-shaped bolt with a head that matches the groove.

7. The anti-loosening reinforcement structure for railway track fasteners according to claim 1, characterized in that: The first bolt (15) is made of high-strength alloy steel, and its lower end is pre-embedded and solidified in the concrete of the sleeper (10).

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