Low resistance under-track pad

Abstract

The utility model discloses a small resistance rail lower pad relates to rail transit field, including the antifriction board of upper position and the elastic pad of lower position, the working surface and the bottom of antifriction board are provided with the longitudinal groove for increasing the contact area of antifriction board and elastic pad, can improve the bonding performance of small resistance rail lower pad, the bottom of antifriction board is provided with the horizontal boss for improving the longitudinal anti -drop performance of antifriction board and elastic pad, the structure size of longitudinal groove of antifriction board can adjust, the both sides of elastic pad are provided with the water guide groove, and the edge of water guide groove is ramp shape, the longitudinal edge of elastic pad is set down and sets up the anti -drop structure, and the anti -drop structure can improve the longitudinal anti -drop performance of small resistance rail lower pad and fastener, through the design of antifriction board, elastic pad structure and cooperation, promote the anti -drop and insulation performance of small resistance rail lower pad.

Description

Technical Field

[0001] This utility model relates to the field of rail transit, specifically a low-resistance rail pad. Background Technology

[0002] In the rail transit sector, low-resistance fasteners are widely used in elevated seamless tracks, primarily by reducing the interaction between the rail and the beam through low-resistance rail pads. Currently, low-resistance rail pads mainly employ a stainless steel plate-rubber composite structure. Due to the small creepage distance between the running rail and the track bed, the stainless steel plate is prone to stray currents in long-term rain exposure, leading to severe rusting and corrosion of the low-resistance pads. Simultaneously, due to the high temperatures and cyclic loads of elevated tracks, the longitudinal slippage of the rails is significant. As the rails reciprocate, the low-resistance rail pads gradually slip out and delaminate, exhibiting poor anti-derailment performance. Utility Model Content

[0003] The purpose of this utility model is to provide a low-resistance rail pad, which solves the problems existing in the current low-resistance rail pads mentioned in the background art. This solution improves the anti-detachment and insulation performance of the low-resistance rail pad through the design of the friction-reducing plate, elastic pad structure and cooperation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance rail pad, comprising an upper friction-reducing plate and a lower elastic pad, wherein the working surface and bottom of the friction-reducing plate are provided with longitudinal grooves to increase the contact area between the friction-reducing plate and the elastic pad, thereby improving the adhesion performance of the low-resistance rail pad; the bottom of the friction-reducing plate is provided with transverse protrusions to improve the longitudinal anti-detachment performance between the friction-reducing plate and the elastic pad; the structural dimensions of the longitudinal grooves of the friction-reducing plate can be adjusted, and the variable stiffness design of the low-resistance rail pad can be achieved by adjusting the structure of the longitudinal grooves of the friction-reducing plate;

[0005] The elastic pad is provided with water guide grooves on both sides, and the edges of the water guide grooves are sloped.

[0006] The longitudinal edge of the elastic pad is folded down to form an anti-detachment structure, which can improve the longitudinal anti-detachment performance of the low-resistance rail pad and the fastener.

[0007] To further optimize this utility model, the following technical solutions may be preferred:

[0008] Preferably, the outer side of the anti-derailment structure is provided with a drainage slope, which facilitates the drainage of water outside the fastener and increases the creepage distance between the rail and the track bed.

[0009] Preferably, the anti-detachment structure is provided with anti-spraying platforms on both sides, which can reduce the amount of water flowing out of the water guide channel from spilling onto the fastener and reduce the generation of stray current.

[0010] Preferably, the friction-reducing plate and the elastic pad are fixed together by vulcanization with an adhesive.

[0011] Preferably, the friction-reducing plate is a non-metallic material, selected from nylon, polyethylene, polytetrafluoroethylene or TPV-type insulating materials.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] (1) Excellent anti-detachment performance: The longitudinal grooves and transverse protrusions at the bottom of the friction-reducing plate greatly increase the contact area and interlocking force with the elastic pad, significantly improving the vertical anti-detachment capability; at the same time, the anti-detachment structure with the longitudinal edge of the elastic pad flipped down further enhances the longitudinal anti-detachment performance of the low-resistance rail pad and the fastener, effectively preventing the low-resistance rail pad from shifting or falling off under the longitudinal force generated by the train operation, ensuring the stability and safety of the track system.

[0014] (2) Excellent insulation performance: The friction reduction plate is made of non-metallic materials such as nylon, polyethylene, polytetrafluoroethylene or TPV, which ensures high insulation performance in terms of material. Combined with the insulation characteristics of the elastic pad, it effectively blocks current conduction, reduces stray current corrosion to the track and surrounding facilities, extends the service life of the track system, and reduces maintenance costs.

[0015] (3) High-efficiency drainage design: The water guide grooves on both sides of the elastic pad, combined with the sloping design of the edge, can quickly guide the water falling along the rail or gauge block to drain outside the fastener; the drainage slope on the outside of the anti-detachment structure and the anti-spreading platform on both sides further optimize the drainage path, prevent water accumulation, increase the creepage distance between the rail and the track bed, reduce the generation of stray current, and at the same time reduce the risk of insulation performance degradation caused by moisture, and improve the operational reliability of the track system in complex environments.

[0016] (4) Variable stiffness adjustment: The structural dimensions of the longitudinal grooves of the friction-reducing plate can be flexibly adjusted. By changing the shape, depth, spacing and other parameters of the grooves, the variable stiffness design of the low-resistance rail pad can be realized. The mechanical properties of the low-resistance rail pad can be customized according to different track conditions and train operation requirements, thereby improving the adaptability of the track system to different load and speed conditions and optimizing the comfort and stability of train operation.

[0017] (5) Stable connection method: The friction-reducing plate and the elastic pad are fixed by vulcanization bonding with adhesive. This connection method not only makes the two tightly combined to form a whole, ensuring the integrity and stability of the structure under long-term dynamic load, but also effectively prevents performance degradation and safety hazards caused by loose connection. Attached Figure Description

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the pad under the low-resistance rail;

[0019] Figure 2 This is a schematic diagram of the structure of the low-resistance rail under pad;

[0020] Figure 3 This is a front view schematic diagram of the structure of the pad under the low-resistance rail;

[0021] Figure 4 This is a cross-sectional structural diagram of the pad under the low-resistance rail.

[0022] 1. Friction-reducing plate; 2. Elastic pad; 3. Lateral protrusion; 4. Longitudinal groove; 5. Water guide channel; 6. Anti-detachment structure; 7. Anti-spreading platform; 8. Drainage slope. Detailed Implementation

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0024] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] Example 1: Please refer to Figures 1-4 A low-resistance rail pad includes an upper friction-reducing plate 1 and a lower elastic pad 2. The working surface and bottom of the friction-reducing plate are provided with longitudinal grooves 4 to increase the contact area between the friction-reducing plate and the elastic pad, which can improve the adhesion performance of the low-resistance rail pad. The bottom of the friction-reducing plate is designed with transverse protrusions 3 to improve the longitudinal anti-detachment performance between the friction-reducing plate and the elastic pad. The structural dimensions of the longitudinal grooves of the friction-reducing plate can be adjusted, and the variable stiffness design of the low-resistance rail pad can be realized by adjusting the structure of the longitudinal grooves of the friction-reducing plate.

[0026] As a preferred embodiment, water guide grooves 5 are designed on both sides of the elastic pad. The edges of the water guide grooves are sloping, so that water falling along the rail or gauge block can be discharged outside the fastener through the water guide grooves.

[0027] As a preferred embodiment, the longitudinal edge of the elastic pad is designed with a downward folding anti-detachment structure 6, which can improve the longitudinal anti-detachment performance of the low-resistance rail pad and the fastener.

[0028] As a preferred embodiment, the outer side of the anti-derailment structure is designed with a drainage slope 8, which facilitates the drainage of water outside the fasteners and increases the creepage distance between the rail and the track bed.

[0029] As a preferred embodiment, the anti-detachment structure is provided with anti-spraying platforms 7 on both sides, which can reduce the water flowing out of the water guide channel from spilling onto the fastener and reduce the generation of stray current.

[0030] In a preferred embodiment, the friction-reducing plate 1 and the elastic pad 2 are fixed together by vulcanization with an adhesive.

[0031] As a preferred embodiment, the friction-reducing plate 1 may be made of nylon, polyethylene, polytetrafluoroethylene, TPV or other non-metallic materials with performance not inferior to its own.

[0032] The production process of the aforementioned low-resistance rail pad is as follows:

[0033] I. Component Manufacturing

[0034] (I) Friction-reducing plate manufacturing

[0035] Nylon, polyethylene, or polytetrafluoroethylene (PTFE) are selected as the non-metallic materials for the friction-reducing plate, and it is processed using injection molding. During the molding process, longitudinal grooves are machined on the working surface and bottom of the friction-reducing plate. By adjusting the mold structure parameters, the shape, depth, spacing, and other structural dimensions of the longitudinal grooves are precisely controlled to meet the requirements of variable stiffness design. At the same time, transverse protrusions are machined on the bottom of the friction-reducing plate. The height, width, and distribution density of the transverse protrusions are set according to the actual anti-detachment performance and design stiffness requirements to ensure that they can tightly engage with the elastic pad and improve the longitudinal anti-detachment performance. After processing, the edges and burrs of the friction-reducing plate are removed to ensure that the working surface is flat and smooth and the bottom bonding surface is roughened to avoid affecting the bonding effect with the elastic pad and the overall performance due to surface defects.

[0036] (II) Pretreatment of Anti-friction Plate

[0037] First, apply a layer of adhesive evenly to the bottom of the friction-reducing plate. The adhesive should be a vulcanizing adhesive suitable for bonding non-metallic and rubber materials. Ensure that the adhesive is applied evenly without any missed spots or accumulation.

[0038] II. Fabrication of Low-Resistance Rail Pads

[0039] The elastic pad is made of rubber material with good insulation and elasticity, and the low-resistance rail pad is processed by compression molding. Water channels are directly formed on both sides of the elastic pad using a mold design, ensuring the edges of the channels are sloping to facilitate smooth water drainage. On the longitudinal edge of the elastic pad, a downward-folding anti-detachment structure is directly formed using a mold design. The size and shape of the anti-detachment structure are determined based on the fit requirements with the fasteners and the anti-detachment performance requirements. A drainage slope is formed on the outside of the anti-detachment structure, and both sides of the anti-detachment structure have integrally formed anti-spill platforms. The height and width of the anti-spill platforms are designed to effectively prevent water flowing from the water channels from spilling onto the fasteners.

[0040] Before vulcanization, the pre-treated friction-reducing plate is placed in the mold. During vulcanization, pressure, temperature, and time parameters are strictly controlled to ensure the adhesive fully cures and that the friction-reducing plate is firmly bonded to the elastic pad. After vulcanization, the low-resistance rail pad is subjected to quality inspection to check whether the bonding is firm and whether there are any defects such as bubbles or gaps, ensuring that the bonding quality meets the requirements.

[0041] III. Installation and Performance Adjustment of Low-Resistance Rail Pads

[0042] (I) Installation process

[0043] Lift the rail and install the assembled low-resistance rail pad between the rail fastener and the rail. During installation, ensure the low-resistance rail pad is accurately positioned to prevent displacement under longitudinal force. After installation, check the installation status of the low-resistance rail pad to ensure it is securely installed and free from looseness.

[0044] (II) Performance Adjustment

[0045] Depending on different track conditions and train operation requirements, the variable stiffness of the low-resistance rail pad can be adjusted by modifying the structure of the longitudinal grooves in the friction-reducing plate. When it is necessary to adjust the stiffness of the low-resistance rail pad, the depth or spacing of the longitudinal grooves can be appropriately increased or decreased to ensure that the mechanical properties of the low-resistance rail pad meet the actual operating requirements and improve the comfort and stability of train operation.

[0046] IV. Routine Maintenance and Drainage Guarantee

[0047] During the operation of the track system, the low-resistance rail pads should be inspected and maintained regularly. Special attention should be paid to checking the water channels of the low-resistance rail pads for blockages and any obstructions. If debris is found in the channels, it should be cleaned promptly to ensure that water flows smoothly through the channels and is discharged outside the fasteners. The condition of the anti-spraying platform should also be checked; any damage should be repaired or replaced promptly to prevent water from spilling onto the fasteners and reducing stray current generation. Simultaneously, the connection between the low-resistance rail pads and the fasteners, as well as the adhesion between the friction-reducing plate and the elastic pad, should be checked. Any problems should be addressed promptly to ensure the stable performance of the low-resistance rail pads and extend the service life of the track system.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-resistance rail pad, characterized in that: It includes an upper friction-reducing plate and a lower elastic pad. The working surface and bottom of the friction-reducing plate are provided with longitudinal grooves to increase the contact area between the friction-reducing plate and the elastic pad, which can improve the adhesion performance of the low-resistance rail pad. The bottom of the friction-reducing plate is provided with transverse protrusions to improve the longitudinal anti-detachment performance between the friction-reducing plate and the elastic pad. The structural dimensions of the longitudinal grooves of the friction-reducing plate can be adjusted. By adjusting the structure of the longitudinal grooves of the friction-reducing plate, the variable stiffness design of the low-resistance rail pad can be realized. The elastic pad is provided with water guide grooves on both sides, and the edges of the water guide grooves are sloped. The longitudinal edge of the elastic pad is folded down to form an anti-detachment structure, which can improve the longitudinal anti-detachment performance of the low-resistance rail pad and the fastener.

2. The low-resistance rail pad according to claim 1, characterized in that: The anti-derailment structure has a drainage slope on the outside, which facilitates the drainage of water outside the fastener and increases the creepage distance between the rail and the track bed.

3. The low-resistance rail pad according to claim 1, characterized in that: The anti-detachment structure is equipped with anti-spraying platforms on both sides, which can reduce the amount of water flowing out of the water guide channel from spilling onto the fasteners and reduce the generation of stray current.

4. The low-resistance rail pad according to claim 1, characterized in that: The friction-reducing plate and the elastic pad are bonded together by vulcanization using an adhesive.

5. A low-resistance rail pad according to claim 1, characterized in that: The friction-reducing plate is a non-metallic material, selected from nylon, polyethylene, polytetrafluoroethylene or TPV-type insulating materials.

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