Negative Poisson's ratio high-speed railway damping sleeper base plate

Abstract

The utility model relates to the technical field of railways, and discloses a negative poisson ratio high-speed railway damping sleeper base plate which comprises a bottom plate, a sleeper body is fixedly connected to the top of the bottom plate, a rail body is fixedly connected to the top of the sleeper body, and a connecting mechanism is fixedly connected to the interior of the rail body. The inner part of the sleeper main body is fixedly connected with an anti-deviation mechanism, and the inner part of the sleeper main body is fixedly connected with a damping mechanism; the anti-deviation mechanism comprises a base plate body, the exterior of the base plate body is slidably connected to the interior of the sleeper body, a containing groove is formed in the sleeper body, and a plurality of extrusion springs are fixedly connected to the interior of the containing groove. According to the utility model, the fixing block fixes the base plate main body through the elastic support of the damping mechanism, so that the position of the base plate can be effectively fixed, the deviation of the base plate is avoided, the base plate is always kept at a preset position, and the deformation or damage of a track caused by the deviation of the base plate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of railway technology, and in particular to a negative Poisson's ratio high-speed railway vibration damping sleeper pad. Background Technology

[0002] High-speed railways generate significant vibrations during operation, especially when trains pass through track connection points. Negative Poisson's ratio materials have excellent energy absorption capabilities, effectively reducing the transmission of vibrations generated by train movement to the track, sleepers, and surrounding environment. Applying negative Poisson's ratio material to damping sleeper pads can mitigate the propagation of these vibrations, reduce track wear, and improve the smoothness of train operation.

[0003] The structure of a negative Poisson's ratio high-speed railway vibration damping sleeper pad includes a placement groove, compression spring, and fixing block. Poisson's ratio describes the ratio of deformation in the perpendicular direction when a material is subjected to force in one direction. For conventional materials, when deformation occurs in the direction of force, the opposite deformation occurs in the perpendicular direction, and the Poisson's ratio is usually positive. However, negative Poisson's ratio materials have different characteristics. When subjected to force, the material contracts laterally when stretched in one direction, or expands laterally when compressed. This property gives it unique vibration damping and energy absorption performance.

[0004] In existing technologies, some high-speed railway vibration-damping sleeper pads are typically placed simply between the top of the sleeper and the bottom of the rail. However, the pads are not securely fixed and are prone to displacement or shifting. Especially when high-speed trains are passing, the displacement of the pads can lead to uneven contact between the rail and the sleeper, further causing track settlement, wear, and instability, thus affecting the long-term operational stability and service life of the railway. Therefore, a negative Poisson's ratio high-speed railway vibration-damping sleeper pad is proposed to solve the above problems. Utility Model Content

[0005] The negative Poisson's ratio high-speed railway vibration damping sleeper pad proposed in this utility model aims to improve the problem that some existing devices do not take into account the displacement of the pad at the bottom of the rail during train operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A negative Poisson's ratio high-speed railway vibration-damping sleeper pad includes a base plate, a sleeper body fixedly connected to the top of the base plate, a rail body fixedly connected to the top of the sleeper body, a connecting mechanism fixedly connected inside the rail body, an anti-deviation mechanism fixedly connected inside the sleeper body, and a vibration-damping mechanism fixedly connected inside the sleeper body. The anti-deviation mechanism includes a pad body, the outside of which is slidably connected to the inside of the sleeper body. A placement groove is formed inside the sleeper body, and multiple compression springs are fixedly connected inside the placement groove. A fixing block is fixedly connected to the front side of the multiple compression springs.

[0008] As a further description of the above technical solution:

[0009] The connecting mechanism includes a screw, the bottom of which is fixedly connected to the top of the sleeper body. A baffle seat is fixedly connected to the top of the sleeper body, and a gauge baffle is fixedly connected to the top of the baffle seat. An A-type elastic strip is fixedly connected to the outside of the screw.

[0010] As a further description of the above technical solution:

[0011] The screw is externally fixedly connected to a flat washer, the top of the flat washer is fixedly connected to a nut, and the top of the nut is fixedly connected to a dust cap.

[0012] As a further description of the above technical solution:

[0013] The shock absorption mechanism includes multiple small pads, which are externally fixedly connected to the interior of the sleeper body. Multiple shock absorption springs are fixedly connected to the interior of the sleeper body.

[0014] As a further description of the above technical solution:

[0015] The screw is externally fixed to the inside of the dust cap, and the nut is internally threaded to the outside of the screw.

[0016] As a further description of the above technical solution:

[0017] The bottom of the type A elastic bar is fixedly connected to the top of the gauge baffle, and the outside of the nut is fixedly connected to the inside of the dust cap.

[0018] As a further description of the above technical solution:

[0019] The bottom of the rail body is fixedly connected to the top of the pad body, and the outside of the pad body is slidably connected to the inside of the placement groove.

[0020] As a further description of the above technical solution:

[0021] The inner sides of the two fixing blocks are fixedly connected to the outer side of the pad body, and the outer sides of the two fixing blocks are slidably connected to the inside of the sleeper body.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the sleeper body and the rail body are connected by a connecting mechanism, the pad body is placed in the placement groove, and the fixing block is fixed by the elastic support of the shock absorption mechanism. This can effectively fix the position of the pad, prevent the pad from shifting, keep the pad in the predetermined position, and reduce track deformation or damage caused by pad shifting.

[0024] 2. In this utility model, the main body of the pad is made of a negative Poisson's ratio material. The characteristics of the negative Poisson's ratio material enable the pad and the shock-absorbing spring to effectively absorb and dissipate vibration energy when subjected to force. The placement groove at the bottom of the pad body contains multiple small pads and shock-absorbing springs, which disperse the pressure, reduce the burden on a single pad, and prevent cracking or damage due to excessive concentrated pressure. Attached Figure Description

[0025] Figure 1 This is a perspective view of the negative Poisson's ratio high-speed railway vibration-damping sleeper pad proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the sleeper structure of the negative Poisson's ratio high-speed railway vibration-damping sleeper pad proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0029] Legend:

[0030] 1. Base plate; 2. Sleeper body; 3. Rail body; 4. Connecting mechanism; 5. Screw; 6. Baffle seat; 7. Track gauge baffle; 8. Type A elastic bar; 9. Flat washer; 10. Nut; 11. Dust cap; 12. Anti-deviation mechanism; 13. Pad body; 14. Placement slot; 15. Compression spring; 16. Fixing block; 17. Shock absorption mechanism; 18. Small pad; 19. Shock absorption spring. Detailed Implementation

[0031] 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 protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of a negative Poisson's ratio high-speed railway vibration-damping sleeper pad, including a base plate 1. The base plate 1 is the basic structure of the entire vibration-damping sleeper pad, providing stable support. Its main function is to support the sleeper body 2. The sleeper body 2 is fixedly connected to the top of the base plate 1. The sleeper body 2 supports the rail body 3. The sleeper body 2 is made of concrete and mainly bears the dynamic load from the track, vehicles and the outside. The rail body 3 is fixedly connected to the top of the sleeper body 2. The bottom of the rail body 3 is fixedly connected to the top of the pad body 13. The rail body 3 bears and transmits the running load of the railway vehicles and is fixed to the top of the sleeper body 2. A connecting mechanism 4 is fixedly connected inside the rail body 3. The connecting mechanism 4 is used to connect and fix the connection part between the sleeper body 2 and the rail body 3. An anti-deviation mechanism 12 is fixedly connected inside the sleeper body 2. The anti-deviation mechanism 12 mainly prevents the pad body 13 from shifting. A vibration-damping mechanism 17 is fixedly connected inside the sleeper body 2 to reduce the impact of vibration generated by train operation on the track device.

[0033] The anti-deviation mechanism 12 includes a pad body 13, which is externally slidably connected to the interior of the sleeper body 2. When the train runs on the rail, the pad body 13 engages and slides within a placement groove 14 inside the sleeper body 2, ensuring that the pad body 13 does not slip out and deviate. The pad body 13 is externally slidably connected to the interior of the placement groove 14. The material of the pad body 13 is negative Poisson's ratio. When subjected to force, negative Poisson's ratio materials absorb more energy while expanding laterally. This unique mechanical property allows it to effectively absorb and disperse external energy in impact or vibration environments, thereby reducing the impact of vibration on structures or objects. When vibration and impact occur, this material can alleviate or weaken the transmission of energy. The energy delivered to the system plays a role in shock absorption. The interior of the sleeper body 2 has a placement groove 14. Multiple compression springs 15 are fixedly connected inside the placement groove 14. Fixing blocks 16 are fixedly connected to the front of the multiple compression springs 15. The inner sides of the two fixing blocks 16 are fixedly connected to the outer sides of the pad body 13, and the outer sides of the two fixing blocks 16 are slidably connected to the interior of the sleeper body 2. When installing the pad body 13, the pad body 13 is placed into the placement groove 14. Supported by the elastic force of the compression springs 15, the front fixing blocks 16 can slide and retract to fix the pad body 13 in the upper middle part of the sliding groove to prevent displacement. The fixing blocks 16 are arc-shaped trapezoids that can accommodate the pad body 13 to slide in from the top for fixing.

[0034] Reference Figure 1 , Figure 3 The connecting mechanism 4 includes a screw 5. The screw 5 is externally fixedly connected to the inside of the dust cap 11. The bottom of the screw 5 is fixedly connected to the top of the sleeper body 2. A baffle seat 6 is fixedly connected to the top of the sleeper body 2. A gauge baffle 7 is fixedly connected to the top of the baffle seat 6. The function of the baffle seat 6 is to ensure the stability of the gauge baffle 7. The gauge baffle 7 is fixed to the screw 5 by an A-type elastic strip 8 to ensure the consistency of the track width. An A-type elastic strip 8 is fixedly connected to the outside of the screw 5. The bottom of the A-type elastic strip 8 is fixedly connected to the gauge baffle 7. At the top of plate 7, a flat washer 9 is fixedly connected to the outside of screw 5. A nut 10 is fixedly connected to the top of flat washer 9. The outside of nut 10 is fixedly connected to the inside of dust cap 11. The inner thread of nut 10 is connected to the outside of screw 5. As the core component of the connection, screw 5, flat washer 9 and nut 10 interact to ensure the stability of the connection point. Dust cap 11 is fixedly connected to the top of nut 10. Dust cap 11 is used to cover the connecting parts to prevent dust and debris from entering the connection point, thereby extending the service life of the track assembly.

[0035] Reference Figure 1 , Figure 2 and Figure 4The shock absorption mechanism 17 includes multiple small pads 18, which are externally fixed to the inside of the sleeper body 2. These small pads 18 are fixed inside the sleeper body 2 to disperse and mitigate track vibration. The material of the small pads 18 is the same as that of the pad body 13. Multiple shock-absorbing springs 19 are fixedly connected inside the sleeper body 2. The multiple shock-absorbing springs 19 are combined with the small pads 18 and adopt a reasonable elastic design to absorb external vibration and slow down the transmission of vibration, thereby improving the comfort and stability of the railway device.

[0036] Working principle: When the train is running, the rail body 3 bears and transmits the running load of the vehicle. The anti-deviation mechanism 12 inside the sleeper body 2 ensures that the pad body 13 is engaged and slides in the placement groove 14 inside the sleeper body 2 to prevent deviation. The front fixing block 16 can slide and retract under the elastic force of the compression spring 15 to fix the pad body 13 in the middle and upper part of the sliding groove to prevent deviation. The fixing block 16 is an arc trapezoid. The fixing pad body 13 is made of negative Poisson's ratio material, which can expand laterally and absorb more energy when subjected to force, effectively reducing the impact of vibration and shock on the track device.

[0037] The base plate 1 provides a stable support for the sleeper body 2. The sleeper body 2 mainly bears the dynamic load from the rail body 3. The rail body 3 is connected to the sleeper body 2 through the connecting mechanism 4. The connecting mechanism 4 ensures a stable connection between the sleeper body 2 and the gauge baffle 7 through screws 5, flat washers 9 and nuts 10. The baffle seat 6 ensures the stability of the gauge baffle 7. The gauge baffle 7 is fixed to the screws 5 through A-type elastic strips 8 to ensure the consistency of the track width. The dust cap 11 covers the connecting parts to prevent dust and debris from entering and extend the service life of the track components.

[0038] When vibration occurs, the combination of the small pads 18 in the damping mechanism 17 and the damping springs 19 disperses the pressure of the top pad body 13, making the load on each small pad 18 smaller, thereby enhancing the overall load-bearing capacity. Dispersing the pressure helps to reduce the burden on individual pads and damping springs 19, preventing breakage or damage due to excessive pressure concentration. When subjected to external forces, the damping springs 19 can absorb and alleviate these energies through elastic deformation, thereby reducing vibration transmission.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is 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 negative Poisson's ratio high-speed railway vibration damping sleeper pad, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to the sleeper body (2), the top of the sleeper body (2) is fixedly connected to the rail body (3), the rail body (3) is fixedly connected to the inside of the rail body (3), the sleeper body (2) is fixedly connected to the anti-deviation mechanism (12), and the sleeper body (2) is fixedly connected to the inside of the shock absorption mechanism (17). The anti-deviation mechanism (12) includes a pad body (13), the outside of which is slidably connected to the inside of the sleeper body (2). The inside of the sleeper body (2) is provided with a placement groove (14), and a plurality of compression springs (15) are fixedly connected inside the placement groove (14). A fixing block (16) is fixedly connected to the front side of the plurality of compression springs (15).

2. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 1, characterized in that: The connecting mechanism (4) includes a screw (5), the bottom of which is fixedly connected to the top of the sleeper body (2), a baffle seat (6) is fixedly connected to the top of the sleeper body (2), a gauge baffle (7) is fixedly connected to the top of the baffle seat (6), and an A-type elastic strip (8) is fixedly connected to the outside of the screw (5).

3. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 2, characterized in that: The screw (5) is externally fixedly connected to a flat washer (9), the top of the flat washer (9) is fixedly connected to a nut (10), and the top of the nut (10) is fixedly connected to a dust cap (11).

4. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 1, characterized in that: The shock absorption mechanism (17) includes multiple small pads (18), the external parts of which are fixedly connected to the inside of the sleeper body (2), and multiple shock absorption springs (19) are fixedly connected to the inside of the sleeper body (2).

5. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 3, characterized in that: The screw (5) is externally fixedly connected to the inside of the dust cap (11), and the inner thread of the nut (10) is threadedly connected to the outside of the screw (5).

6. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 3, characterized in that: The bottom of the type A elastic bar (8) is fixedly connected to the top of the gauge baffle (7), and the outside of the nut (10) is fixedly connected to the inside of the dust cap (11).

7. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 1, characterized in that: The bottom of the rail body (3) is fixedly connected to the top of the pad body (13), and the outside of the pad body (13) is slidably connected to the inside of the placement groove (14).

8. The negative Poisson's ratio high-speed railway vibration-damping sleeper pad according to claim 1, characterized in that: The inner sides of the two fixing blocks (16) are fixedly connected to the outer side of the pad body (13), and the outer sides of the two fixing blocks (16) are slidably connected to the inside of the sleeper body (2).

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