Fastener system of embedded track

Abstract

The utility model relates to the technical field of rail fasteners, in particular to an embedded rail fastener system which comprises wedge blocks clamped on two sides of a steel rail, the inner side faces of the wedge blocks are matched with the rail web of the steel rail in shape, side face adjusting mechanisms are arranged on the outer sides of the wedge blocks, and the side face adjusting mechanisms are used for restraining the wedge blocks and the steel rail in rail grooves in a track bed. The gauge is adjusted; the device further comprises an under-rail pad and a heightening base plate, the under-rail pad and the heightening base plate are arranged at the bottom of the steel rail from top to bottom, the wedge block is a non-metal elastic material body, a plurality of through holes are formed in the wedge block in the length direction of the steel rail, and the height of the steel rail can be adjusted up and down by replacing the heightening base plates with different thicknesses. The fastener system has the characteristic that the vertical and transverse positions of the steel rail are adjustable, and the steel rail can be always kept at the adjusted position after being adjusted.

Description

Technical Field

[0001] The utility model relates to the field of rail transit, and particularly relates to a fastener system for an embedded track. Background Art

[0002] Under the background of the rapid development of the railway transportation system, especially today when the urban economy in our country is booming, the subway, as the core facility to relieve urban traffic pressure and improve the efficiency of public transportation, is rapidly expanding its network in major cities. Subway trains, characterized by large transportation volume, heavy axle load, high operation frequency, and frequent starting (braking), pose extremely stringent requirements on the smoothness, stability, and reliability of the track system. These requirements not only concern the operation safety of the train but also directly affect the riding experience of passengers.

[0003] When facing these characteristics of subway trains, the traditional track structure often seems inadequate, especially in terms of suppressing noise, controlling the generation and development trend of corrugation. As an innovative track structure type, the embedded track effectively eliminates the periodic constraint problem in the traditional track structure by providing continuous rail support and restraint, significantly improves the stress state of the rail, and thus achieves better noise reduction effect and corrugation control. This advantage has made the embedded track more and more widely used in the track system.

[0004] However, during the construction process of the embedded track, a key problem is how to ensure the fixation and restraint of the rail while meeting the requirements of distance adjustment and height adjustment during the construction process. Traditional construction methods often have problems such as complex operation, low efficiency, and difficulty in ensuring construction quality. Therefore, it is particularly important to develop a device that can not only meet the construction requirements but also does not need to be removed after construction and can improve the vertical and lateral stiffness of the track. Summary of the Invention

[0005] Based on such a background, the utility model proposes a fastener system for an embedded track. This system realizes the flexible fixation and restraint of the rail through a unique design and simultaneously has the functions of distance adjustment and height adjustment. During the construction stage, this system can simplify the operation process and improve construction efficiency; after the construction is completed, this system can serve as a part of the track structure without being removed and significantly improve the vertical and lateral stiffness of the track, providing a strong guarantee for the safe and stable operation of subway trains.

[0006] In order to achieve the above object, the embodiments of the present utility model specifically adopt the following technical solutions: A fastener system for an embedded track includes wedge blocks clamped on both sides of the rail. The inner side surface of the wedge block matches the outer shape of the rail web. A side adjustment mechanism is provided on the outer side of the wedge block. The side adjustment mechanism is used to constrain the wedge block and the rail in the rail groove on the roadbed for adjusting the gauge. It also includes an under-rail pad and a height-adjusting pad. The height-adjusting pad and the under-rail pad are arranged at the bottom of the rail from top to bottom. The up-and-down adjustment of the height of the rail can be achieved by replacing height-adjusting pads with different thicknesses. The wedge block is a non-metallic elastic material body, and a plurality of through holes are provided on the wedge block along the length direction of the rail. The stiffness of the wedge block is adjusted by adjusting the position and aperture of the through holes.

[0007] In order to further optimize the present utility model, the following technical solutions can be preferably adopted:

[0008] Preferably, the side adjustment mechanism includes a back plate, a flange face locking nut, a bolt and an insulating cap. The back plate is arranged on the outer side surface of the wedge block. The back plate is a metal part. A hexagonal receiving groove for cooperating with the flange face locking nut is provided on the outer side surface of the wedge block. A round hole for cooperating with the flange face locking nut is provided on the back plate. The flange face locking nut is embedded in the hexagonal receiving groove and the round hole. The bolt is in threaded cooperation with the flange face locking nut, and the free end of the bolt abuts against the side wall of the rail groove on the roadbed.

[0009] Preferably, a groove is provided on the outer side surface of the wedge block, and a plurality of positioning holes are provided at the bottom of the groove. The back plate is embedded in the groove, and positioning columns for cooperating with the positioning holes are provided on the inner side surface of the back plate.

[0010] Preferably, an insulating cap is sleeved on the head of the bolt to isolate the fastener system from the roadbed and play an insulating role.

[0011] Preferably, the side adjustment mechanism includes a distance-adjusting block. The distance-adjusting block is arranged on the outer side surface of the wedge block. One end of the distance-adjusting block abuts against the side wall of the rail groove on the roadbed, and the other end of the distance-adjusting block fits against the outer side surface of the wedge block. A tooth structure arranged horizontally is provided on the outer side surface of the wedge block, and a plurality of tooth parts for cooperating with the tooth structure are provided on the distance-adjusting block. The lateral position of the rail is adjusted by adjusting the cooperation between the distance-adjusting block and the tooth structure of the wedge block, and at the same time, the wedge block is squeezed towards the rail from both sides to ensure the position accuracy of the rail after adjustment.

[0012] Preferably, the joint surface between the tooth parts of the distance-adjusting blocks on both sides of the rail and the tooth structure is in an "eight" shape.

[0013] A fastener system for an embedded track, the beneficial effects brought by its design are mainly reflected in the following aspects:

[0014] 1. Flexible adjustment of rail height: The design of the built-in under-rail pad and shim in the system enables users to easily adjust the height of the rail up and down by replacing shims of different thicknesses. This function not only meets the precise adjustment requirements during construction but also provides great convenience for height correction in subsequent track maintenance, ensuring the long-term smoothness and stability of the track system.

[0015] 2. Simplify construction and maintenance processes: The compact structure and easy operation of this fastener system greatly simplify the installation and commissioning steps during construction. At the same time, its non-removal feature also reduces the workload of track maintenance and lowers the maintenance cost. In addition, due to the tight and reliable cooperation between the components of the system, it can effectively extend the service life of the track system.

[0016] 3. Enhance the lateral stiffness of the rail: Through the wedges clamped on both sides of the rail and the lateral adjustment mechanism on the outside, the system can tightly and stably restrain the rail within the rail groove on the roadbed. This design not only enhances the connection strength between the rail and the roadbed but also significantly improves the lateral stiffness of the rail, helping to reduce the noise and wear caused by lateral vibration during train operation and enhancing the overall stability of the track system.

[0017] 4. Promote energy conservation, emissions reduction, and environmental protection: By improving the stress behavior of the rail and reducing vibration and noise, this system helps to reduce the energy consumption and emissions during train operation, meeting the current development trend of energy conservation, emissions reduction, and environmental protection. At the same time, its characteristics of long service life and low maintenance cost also help to reduce resource waste and environmental pollution. Description of the Drawings

[0018] Figure 1 Schematic three-dimensional structure diagram of the fastener system in Embodiment 1;

[0019] Figure 2 Front view of the fastener system in Embodiment 1;

[0020] Figure 3 Schematic diagram of the usage state of the fastener system

[0021] Figure 4 In Embodiment 1 Figure 1 Enlarged schematic diagram of the structure at Location A;

[0022] Figure 5 Schematic three-dimensional structure diagram of the wedge in Embodiment 1;

[0023] Figure 6 Schematic diagram of the backplate structure in Embodiment 1;

[0024] Figure 7 Schematic diagram of the connection of the flange face lock nut and bolt in Embodiment 1;

[0025] Figure 8 Schematic structural diagram of the insulating cap in Embodiment 1;

[0026] Figure 9 Stereoscopic structural diagram of the fastener system in Embodiment 2;

[0027] Figure 10 Front view of the fastener system in Embodiment 2;

[0028] Figure 11 Stereoscopic structural diagram of the wedge block in Embodiment 2;

[0029] Figure 12 Schematic structural diagram of the distance adjusting block in Embodiment 2.

[0030] In the figure: 1, rail; 2, wedge block; 3, side adjusting mechanism; 4, roadbed; 5, rail groove; 6, under-rail pad; 7, height-adjusting pad; 8, back plate; 9, flange face lock nut; 10, bolt; 11, insulating cap; 12, hexagonal receiving groove; 13, round hole; 14, groove; 15, positioning hole; 16, positioning post; 17, elastic paste; 18, through hole; 19, distance adjusting block; 20, tooth structure; 21, tooth part. Specific embodiments

[0031] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0032] Embodiment 1: A fastener system for an embedded track, including wedge blocks 2 clamped on both sides of the rail 1. The inner side surface of the wedge block matches the shape of the rail web. A side adjusting mechanism 3 is installed on the outer side of the wedge block. The side adjusting mechanism is used to constrain the wedge block and the rail in the rail groove 5 on the roadbed 4 to improve the lateral stiffness of the rail; it also includes an under-rail pad 6 and a height-adjusting pad 7. The height-adjusting pad 7 and the under-rail pad 6 are installed at the bottom of the rail from top to bottom. The height of the rail can be adjusted up and down by replacing height-adjusting pads of different thicknesses;

[0033] Among them, the wedge block is a non-metallic elastic material body, such as thermoplastic elastomer TPE, etc., which can play a shock-absorbing role; among them, the side adjusting mechanism includes a back plate 8, a flange face lock nut 9, a bolt 10 and an insulating cap 11; the back plate is installed on the outer side surface of the wedge block. The back plate is a metal part. A hexagonal receiving groove 12 matching the flange face lock nut is provided on the outer side surface of the wedge block, and a round hole 13 matching the flange face lock nut is provided on the back plate. The flange face lock nut is embedded in the hexagonal receiving groove and the round hole. The bolt 10 is in threaded cooperation with the flange face lock nut, and the free end of the bolt abuts against the side wall of the rail groove on the roadbed.

[0034] Among them, a groove 14 is provided on the outer side surface of the wedge block, and a plurality of positioning holes 15 are provided at the bottom of the groove 14. The back plate is embedded in the groove, and a positioning post 16 that matches the positioning hole is installed on the inner side surface of the back plate.

[0035] Among them, an insulating cap 11 is sleeved on the bolt head to isolate the fastener system from the roadbed and play an insulating role.

[0036] Among them, a plurality of through holes 18 are provided on the wedge block along the length direction of the rail. ， The stiffness of the wedge block is adjusted by adjusting the position and aperture of the through hole.

[0037] The distance adjustment process of this fastener system is as follows: the position of the wedge block is controlled by the tightening length of the bolt, that is, the distance adjustment of the rail in the horizontal direction is realized.

[0038] The height adjustment process of this fastener system is as follows: a height adjustment shim of a certain thickness is set during initial installation. When the height needs to be increased, the height adjustment shim is replaced or added. When the height needs to be decreased, the height adjustment shim is replaced or removed, that is, the height adjustment of the rail in the vertical direction is realized.

[0039] The usage method of this fastener system is as follows: sequentially place the under-rail pad, height adjustment shim and rail. After installing the nuts on the wedge blocks respectively, fully screw the bolts into the wedge blocks, and place the wedge blocks on the rail waists on both sides of the rail. According to the situation, after adjusting the position of the rail, screw out the bolts and tighten them against the inner wall of the rail groove. After ensuring that the position of the rail is correct, pour elastic slurry 17 into the rail groove without removing the fastener system.

[0040] Embodiment 2:

[0041] The difference from Embodiment 1 is that: in this embodiment, the side adjustment mechanism includes a distance adjustment block 19. The distance adjustment block is installed on the outer side surface of the wedge block. One end of the distance adjustment block abuts against the side wall of the rail groove on the roadbed, and the other end of the distance adjustment block fits against the outer side surface of the wedge block. A tooth structure 20 arranged horizontally is designed on the outer side surface of the wedge block 2, and a plurality of tooth parts 21 that cooperate with the tooth structure are designed on the distance adjustment block. The lateral position of the rail is adjusted by adjusting the cooperation mode of the distance adjustment block and the tooth structure of the wedge block, and at the same time, the wedge blocks are squeezed towards the rail from both sides to ensure the position accuracy of the rail after adjustment.

[0042] Among them, the joint surface between the tooth parts 21 of the distance adjustment blocks 19 on both sides of the rail and the tooth structure 20 is trapezoidal or triangular.

[0043] Among them, the height adjustment process is the same as that in Embodiment 1. A height adjustment shim of a certain thickness is set during initial installation. When the height needs to be increased, the height adjustment shim is replaced or added. When the height needs to be decreased, the height adjustment shim is replaced or removed, that is, the height adjustment of the rail in the vertical direction is realized.

[0044] The distance adjustment process of this fastener system is as follows: the position of the distance adjustment block is adjusted by the cooperation of the saw teeth of the distance adjustment block and the saw teeth of the wedge block, that is, the distance adjustment of the rail in the horizontal direction is realized.

[0045] The usage method of this fastener system is as follows: Place the under-rail pad, shim plate and rail in sequence. First, place the wedge blocks on both sides of the rail respectively, and then insert the distance-adjusting blocks from both sides to fit closely with the wedge blocks. According to the situation, after adjusting the position of the rail, insert the distance-adjusting blocks into the corresponding positions that fit with the wedge blocks. After ensuring that the position of the rail is correct, pour the elastic slurry 17 into the rail groove without removing the fastener system.

[0046] After experiments on the above fastener system, its performance parameters are as follows:

[0047]

[0048]

[0049] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0050] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0051] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles or equipment / devices.

[0052] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A fastener system for an embedded track, characterized in that: It includes wedges clamped on both sides of the rail. The inner side surface of the wedge matches the outer shape of the rail web. A side adjustment mechanism is provided on the outer side of the wedge. The side adjustment mechanism is used to constrain the wedge and the rail in the rail groove on the roadbed for adjusting the gauge. It also includes an under-rail pad and a height-adjusting pad. The height-adjusting pad and the under-rail pad are arranged at the bottom of the rail from top to bottom. The up-and-down adjustment of the height of the rail can be achieved by replacing height-adjusting pads with different thicknesses. The wedge is a non-metallic elastic material body. A plurality of through holes are provided in the wedge along the length direction of the rail. The stiffness of the wedge is adjusted by adjusting the positions and diameters of the through holes.

2. The fastening system for an embedded track according to claim 1, characterized in that: The side adjustment mechanism includes a back plate, a flange face locking nut, a bolt and an insulating cap. The back plate is arranged on the outer side surface of the wedge. The back plate is a metal part. A hexagonal receiving groove for cooperating with the flange face locking nut is provided on the outer side surface of the wedge. A round hole for cooperating with the flange face locking nut is provided on the back plate. The flange face locking nut is embedded in the hexagonal receiving groove and the round hole. The bolt is in threaded cooperation with the flange face locking nut. The free end of the bolt abuts against the side wall of the rail groove on the roadbed.

3. The fastener system of an embedded track according to claim 2, characterized in that: A groove is provided on the outer side surface of the wedge. A plurality of positioning holes are provided at the bottom of the groove. The back plate is embedded in the groove. A positioning post for cooperating with the positioning hole is provided on the inner side surface of the back plate.

4. The fastener system for an embedded track according to claim 2, characterized in that: An insulating cap is sleeved on the head of the bolt to isolate the fastening system from the roadbed and play an insulating role.

5. The fastener system for an embedded track according to claim 1, characterized in that: The side adjustment mechanism includes a distance-adjusting block. The distance-adjusting block is arranged on the outer side surface of the wedge. One end of the distance-adjusting block abuts against the side wall of the rail groove on the roadbed. The other end of the distance-adjusting block is in contact with the outer side surface of the wedge. A tooth structure arranged horizontally is provided on the outer side surface of the wedge. A plurality of tooth parts for cooperating with the tooth structure are provided on the distance-adjusting block. The lateral position of the rail is adjusted by adjusting the cooperation mode of the distance-adjusting block and the tooth structure of the wedge. At the same time, the wedge is squeezed towards the rail from both sides to ensure the position accuracy of the rail after adjustment.

6. The fastening system of an embedded track according to claim 5, characterized in that: The joint surface between the tooth parts of the distance-adjusting blocks on both sides of the rail and the tooth structure is trapezoidal or triangular.

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