A rail fastener with a dual-coupling vibration reduction structure

Abstract

This utility model belongs to the field of rail transit technology, specifically referring to a rail fastener with a dual-coupling vibration reduction structure. It includes two elastic clips for fastening the rail and an iron pad disposed between the rail and the sleeper. An insulating buffer pad is provided between the iron pad and the sleeper, and an elastic pad is provided between the iron pad and the insulating buffer pad. The elastic pad is hollow with an open bottom, forming a sealed air cavity between the elastic pad and the insulating buffer pad. This utility model has good vibration reduction effect, effectively improving passenger comfort and reducing the impact on the work and quality of life of residents along the line.

Description

Technical fields:

[0001] This utility model belongs to the field of rail transit technology, and specifically refers to a rail fastener with a dual-coupling vibration reduction structure. Background technology:

[0002] With the rapid development of urban rail transit systems, traffic congestion has been effectively alleviated, and the modernization process of cities has been further accelerated. However, the vibration and noise problems caused by rail transit are becoming increasingly prominent, not only reducing passenger comfort but also affecting the work and quality of life of residents along the lines. At the same time, long-term vibration and noise pollution can also shorten the lifespan of surrounding buildings and equipment. In particular, the impact force generated by wheel-rail coupling vibration can cause surrounding buildings to sway, further exacerbating environmental pollution.

[0003] To effectively address these issues, the use of vibration-damping fasteners on tracks has become a widely adopted solution. Fasteners, as connectors between the rails and sleepers, play a crucial role in fixing the rails and maintaining track stability. Compared to other vibration reduction and noise reduction measures, vibration-damping fasteners offer significant advantages such as convenient construction, simple maintenance, and low cost. However, existing vibration-damping fasteners do not provide ideal vibration reduction performance and still suffer from the aforementioned problems. Utility model content:

[0004] The purpose of this invention is to provide a rail fastener with a dual-coupling vibration reduction structure, which has a good vibration reduction effect, effectively improves passenger comfort, and reduces the impact on the work and quality of life of residents along the line.

[0005] This utility model is implemented as follows:

[0006] A rail fastener with a dual-coupling vibration reduction structure includes two elastic clips for fastening the rail and an iron pad plate disposed between the rail and the sleeper. An insulating buffer pad plate is provided between the iron pad plate and the sleeper, and an elastic pad plate is provided between the iron pad plate and the insulating buffer pad plate. The elastic pad plate is hollow and has an open structure at the bottom, and a sealed air cavity is formed between the elastic pad plate and the insulating buffer pad plate.

[0007] In the above-mentioned rail fastener with a dual coupling vibration reduction structure, the anchor bolt passes through the iron pad, the elastic pad, and the insulating buffer pad in sequence and is screwed to the pre-embedded sleeve set in the sleeper. The elastic pad is provided with a mounting post, and the mounting post is provided with a through hole for the anchor bolt to pass through. The lower surface of the mounting post is flush with the lower surface of the elastic pad.

[0008] In the above-mentioned rail fastener with a dual-coupling vibration reduction structure, four anchor bolts are provided, with two anchor bolts on each side of the rail, and the two anchor bolts are located on the front and rear sides of the elastic bar, respectively. Four mounting columns are provided accordingly.

[0009] In the rail fastener with a dual coupling vibration reduction structure described above, a double-layer spring washer and a flat pad are provided between the head of the anchor bolt and the iron pad, which are fitted on the shank of the anchor bolt.

[0010] In the above-mentioned rail fastener with a dual coupling vibration reduction structure, a rubber pad is provided between the rail and the iron pad.

[0011] In the above-mentioned rail fastener with a dual coupling vibration reduction structure, the upper and lower surfaces of the rubber pad are respectively recessed to form grooves arranged longitudinally, and multiple grooves are arranged at intervals along the transverse direction.

[0012] In the above-mentioned rail fastener with a dual coupling vibration reduction structure, the iron pad is provided with two elastic clip mounting seats, the rubber pad is located between the two elastic clip mounting seats, and the elastic clip is a W-shaped elastic clip, which is fixed to the elastic clip mounting seat by a T-bolt.

[0013] In the above-mentioned rail fastener with a dual-coupling vibration reduction structure, the height of the elastic pad is 15mm-20mm, the top wall thickness of the elastic pad is 8mm-12mm, and the side wall thickness is 12mm-18mm.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] 1. The elastic pad set between the iron pad and the insulating buffer pad of this utility model is a hollow structure with an open bottom, and a sealed air cavity is formed between the elastic pad and the insulating buffer pad. When the iron pad is compressed downward, the air in the sealed air cavity is compressed to absorb and reduce vibration, forming an air vibration damping cavity to achieve the vibration damping effect. Moreover, the air vibration damping is mainly high-frequency vibration damping, which, together with the low-frequency vibration damping of the fastener components, forms multi-frequency vibration damping, which greatly and effectively increases the vibration damping effect.

[0016] 2. The elastic pad of this utility model is provided with an installation post, and the installation post is provided with a through hole for the anchor bolt to pass through. The lower surface of the installation post is flush with the lower surface of the elastic pad. The structure is ingeniously designed and effectively avoids the installation of the anchor bolt from affecting the sealing performance of the air cavity. Attached image description:

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a perspective view of the elastic pad of this utility model;

[0020] Figure 4This is a perspective view of the rubber pad of this utility model.

[0021] Reference numerals: 1. Rail; 2. Elastic clip; 3. Sleeper; 4. Iron pad; 5. Insulating buffer pad; 6. Elastic pad; 7. Sealed air cavity; 8. Anchor bolt; 9. Mounting post; 10. Through hole; 11. Double-layer spring washer; 12. Flat pad; 13. Rubber pad; 14. Groove; 15. Elastic clip mounting seat; 16. T-bolt. Detailed implementation method:

[0022] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0023] A rail fastener with a dual-coupling vibration reduction structure includes two elastic strips 2 for fastening the rail 1 and an iron pad 4 disposed between the rail 1 and the sleeper 3. An insulating buffer pad 5 is provided between the iron pad 4 and the sleeper 3. An elastic pad 6 is provided between the iron pad 4 and the insulating buffer pad 5. The elastic pad 6 is hollow and open at the bottom. A sealed air cavity 7 is formed between the elastic pad 6 and the insulating buffer pad 5.

[0024] In this embodiment, the longitudinal direction is the length direction of rail 1, and the transverse direction is the width direction of rail 1.

[0025] like Figure 1-4 As shown, the elastic pad 6 of this invention, which is set between the iron pad 4 and the insulating buffer pad 5, is hollow and open at the bottom, forming a sealed air cavity 7 between the elastic pad 6 and the insulating buffer pad 5. When the iron pad 4 is compressed downward, the air in the sealed air cavity 7 is compressed to absorb and reduce vibration, forming an air vibration damping cavity to achieve the vibration damping effect. Moreover, the air vibration damping is mainly high-frequency vibration damping, which, together with the low-frequency vibration damping of the fastener components, forms multi-frequency vibration damping, greatly and effectively increasing the vibration damping effect.

[0026] Rail fastener fixing methods: such as Figure 1-3 As shown, the anchor bolt 8 passes through the iron pad 4, the elastic pad 6, and the insulating buffer pad 5 in sequence and is screwed into the pre-embedded sleeve set in the sleeper 3. The elastic pad 6 is provided with a mounting post 9, and the mounting post 9 is provided with a through hole 10 for the anchor bolt 8 to pass through. The lower surface of the mounting post 9 is flush with the lower surface of the elastic pad 6. The structure is ingeniously designed and effectively avoids the installation of the anchor bolt 8 from affecting the sealing performance of the air cavity 7.

[0027] Preferably, four anchor bolts 8 are provided, with two anchor bolts 8 on each side of the rail 1, and the two anchor bolts 8 are located on the front and rear sides of the elastic strip 2, respectively. Four mounting posts 9 are correspondingly provided. This utility model fastener uses a four-anchor bolt 8 anchoring structure to fix the iron pad 4, resulting in strong fixing force and stable installation of the iron pad 4, thus improving the overall stability of the fastener. At the same time, the fixing of the four anchor bolts 8 greatly improves the fastener's resistance to lateral loads.

[0028] To achieve better vibration reduction, a double-layer spring washer 11 and a flat pad 12 are fitted onto the shank of the anchor bolt 8 between the head of the anchor bolt 8 and the iron pad 4. The elastic pad 6 and the double-layer spring washer 11 form a coupled vibration reduction structure. The elastic pad 6 and the double-layer spring washer 11 are both low-frequency vibration reduction units. When the train passes over the impact rail 1 and generates an impact load that is transmitted to the iron pad 4 of the fastener, the iron pad 4 of the fastener forms a simple harmonic motion with vertical attenuation between the elastic pad 6 and the double-layer spring washer 11. The energy of each motion cycle is slowly absorbed by the elastic pad 6 and the double-layer spring washer 11, achieving the effect of coupled vibration reduction.

[0029] To further reduce vibration, a rubber pad 13 is provided between the rail 1 and the iron pad 4. The rubber pad 13 is a low-frequency vibration damping unit. Through its viscoelastic properties, the rubber pad 13 generates internal friction under external force, converting kinetic energy into heat energy, thereby reducing the amplitude. This characteristic makes the rubber pad 13 perform well during high-frequency vibration, effectively absorbing high-frequency vibration energy. The rubber pad 13 and the elastic strip 2 form a coupled vibration damping structure. Both the rubber pad 13 and the elastic strip 2 are low-frequency vibration damping units. When a train passes and causes periodic stress changes, the rail 1 undergoes a simple harmonic motion with vertical attenuation between the rubber pad 13 and the elastic strip 2. The energy of each motion cycle is gradually absorbed by the rubber pad 13 and the elastic strip 2, achieving the effect of coupled vibration damping.

[0030] This invention forms a dual-coupling vibration reduction structure, which has a good vibration reduction effect.

[0031] Furthermore, the upper and lower surfaces of the rubber pad 13 are respectively recessed to form longitudinally arranged grooves 14, and multiple grooves 14 are spaced apart laterally, such as... Figure 2 , 4 As shown, the grooved structure on both the top and bottom surfaces directs heat dissipation and suppresses high-frequency vibrations. The rubber pad 13 also has good cushioning and shock absorption capabilities, converting impact forces and vibrations into small amounts of heat and sound energy, thus preventing these energies from affecting the surrounding environment and human health.

[0032] Structure and installation structure of spring clip 2: Two spring clip mounting seats 15 are provided on the iron pad plate 4, and the rubber pad plate 13 is located between the two spring clip mounting seats 15. The spring clip 2 is a W-shaped spring clip, and the W-shaped spring clip is fixed to the spring clip mounting seat 15 by T-bolts 16.

[0033] Preferably, the height of the elastic pad 6 is 15mm-20mm, the top wall thickness of the elastic pad 6 is 8mm-12mm, and the side wall thickness is 12mm-18mm. In this embodiment, the height of the elastic pad 6 is 16mm, the top wall thickness of the elastic pad 6 is 10mm, and the side wall thickness is 15mm.

[0034] This invention further enhances vibration and noise reduction capabilities while also improving the stability and durability of the fasteners. Through a dual-coupling design, it effectively reduces the transmission of wheel-rail vibration, thereby minimizing the impact on surrounding buildings and residents. This invention not only provides strong support for the sustainable development of urban rail transit but also makes a positive contribution to improving the quality of the urban environment.

[0035] This utility model relates to a bolt-operated, elastically separable rail fastener for shoulderless sleepers. It is suitable for urban rail transit light rail and subway lines, and can be laid in various harsh climatic environments such as high temperature and humidity, coastal areas, and acid rain areas on ballastless tracks without shoulder support structures. Simultaneously, this fastener can effectively maintain a reliable connection between the rail and sleeper over a long period, increasing the rigidity of the track frame, preventing track warping, and effectively maintaining the track's geometric state. During train operation, it bears the longitudinal, lateral, and vertical loads transmitted by the train, providing insulation to ensure both comfortable and safe train operation. It meets the requirements of urban rail transit railway operation conditions.

[0036] The insulating buffer pad 5, elastic pad 6, and rubber pad 13 in this utility model are all commonly used pads for railway fasteners.

[0037] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A rail fastening with double coupling damping structure, comprising two elastic clips (2) for clamping a rail (1) and a tie plate (4) arranged between the rail (1) and a sleeper (3), and an insulating buffer pad (5) arranged between the tie plate (4) and the sleeper (3), characterized in that: An elastic pad (6) is provided between the iron pad (4) and the insulating buffer pad (5). The elastic pad (6) is hollow and open at the bottom, and a sealed air cavity (7) is formed between the elastic pad (6) and the insulating buffer pad (5).

2. A rail fastening with double coupled damping structure according to claim 1, characterized in that: Anchor bolts (8) pass through iron pad (4), elastic pad (6), and insulating buffer pad (5) in sequence and are screwed into the pre-embedded sleeve set in the sleeper (3). The elastic pad (6) is provided with an installation post (9), and the installation post (9) is provided with a through hole (10) for the anchor bolts (8) to pass through. The lower surface of the installation post (9) is flush with the lower surface of the elastic pad (6).

3. A rail fastening with double coupled damping structure according to claim 2, characterized in that: Four anchor bolts (8) are provided. Two anchor bolts (8) are provided on each side of the rail (1). The two anchor bolts (8) are located on the front and rear sides of the elastic bar (2). Four mounting columns (9) are provided accordingly.

4. A rail fastening having a dual coupling damping structure according to claim 2, characterised in that: The head of the anchor bolt (8) and the iron pad (4) are provided with a double-layer spring washer (11) and a flat pad (12) fitted on the shank of the anchor bolt (8).

5. A rail fastening with double coupled damping structure according to claim 1, characterized in that: A rubber pad (13) is provided between the rail (1) and the iron pad (4).

6. A rail fastening having a dual coupling damping structure according to claim 5, characterised in that: The upper and lower surfaces of the rubber pad (13) are respectively recessed to form grooves (14) arranged longitudinally, and multiple grooves (14) are arranged at intervals along the transverse direction.

7. A rail fastening having a dual coupling damping structure according to claim 5, characterised in that: The iron pad (4) is provided with two spring clip mounting seats (15), the rubber pad (13) is located between the two spring clip mounting seats (15), the spring clip (2) is a W-shaped spring clip, and the W-shaped spring clip is fixed on the spring clip mounting seat (15) by a T-bolt (16).

8. A rail fastening having a dual coupled damping structure according to claim 1, characterised in that: The height of the elastic pad (6) is 15mm-20mm, and the top wall thickness of the elastic pad (6) is 8mm-12mm and the side wall thickness is 12mm-18mm.

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