CN115323837A

CN115323837A - Track damping fastener

Info

Publication number: CN115323837A
Application number: CN202210990391.0A
Authority: CN
Inventors: 王阿利; 严安宁; 职涛; 李文博; 高尚君
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-11-11
Also published as: WO2024036660A1

Abstract

The embodiment of the invention relates to a track vibration reduction fastener, which comprises: the steel plate comprises an iron base plate, a height-adjusting base plate, an elastic base plate and a fastener, wherein the height-adjusting base plate is arranged below the iron base plate; the elastic base plate is arranged between the iron base plate and the heightening base plate and comprises a first elastic base plate and a second elastic base plate, the upper surface of the first elastic base plate is contacted with the lower surface of the iron base plate, the lower surface of the second elastic base plate is contacted with the upper surface of the heightening base plate, and the rigidity of the first elastic base plate is smaller than that of the second elastic base plate; the fastener passes through in proper order and locates iron backing plate, elasticity backing plate and heightening backing plate to fasten the three together. The embodiment of the invention can avoid the corrugation damage of steel rail deflection, eversion and the like to a certain extent, ensure the stability of the steel rail, provide smooth running conditions for the train passing through the turnout, relieve the impact vibration of the wheel rail, further play a role in vibration and noise reduction and reduce the maintenance cost.

Description

Track damping fastener

Technical Field

The embodiment of the invention relates to the technical field of rail transit, in particular to a rail vibration reduction fastener.

Background

In the related technology, rail foot buckling type vibration damping fasteners adopted by railway lines and turnouts are two-layer nonlinear vibration damping fasteners and vulcanization type vibration dampers.

The double-layer nonlinear vibration damping fastener achieves the vibration damping effect by reducing the rigidity of a fastener system, the lower the supporting rigidity is, the lower the vibration isolation frequency of a track is, and the better the initial vibration damping effect is. However, due to the reduction of the rail supporting rigidity, the steel rail is easy to deflect and turn outwards when bearing at the later stage, so that the mismatching of wheel-rail relations and the change of the rail rigidity are caused, the unevenness of the rail and the corrugation of the steel rail are aggravated, the vehicle squeaking and the high-frequency vibration are caused, the expected vibration reduction effect cannot be achieved, and the service life of the rail is shortened.

The vulcanization type vibration damper belongs to a shearing type fastener, a rubber base plate under a plate is bonded with a metal base through a vulcanization process, an iron base plate is installed on the metal base plate, the integrity of the fastener is good, but the installation height is high, the transverse rigidity and the torsional rigidity are reduced, a steel rail is easy to deflect and grind, the vibration damping effect is influenced, the service life of the rail is shortened, in addition, once a rubber element is aged and failed in the application process, the whole fastener system needs to be integrally replaced, and the maintenance cost is high.

Accordingly, there is a need to ameliorate one or more of the problems with the above-mentioned related art solutions.

It is noted that this section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Disclosure of Invention

It is an object of embodiments of the present invention to provide a track dampening clip that overcomes, at least to some extent, one or more of the problems due to limitations and disadvantages of the related art.

According to a first aspect of an embodiment of the present invention, there is provided a track damping clip comprising:

an iron backing plate;

the height-adjusting base plate is arranged below the iron base plate;

the elastic base plate is arranged between the iron base plate and the heightening base plate and comprises a first elastic base plate and a second elastic base plate, wherein the upper surface of the first elastic base plate is contacted with the lower surface of the iron base plate, the lower surface of the second elastic base plate is contacted with the upper surface of the heightening base plate, and the rigidity of the first elastic base plate is smaller than that of the second elastic base plate;

the fastener wears to locate in proper order the iron tie plate, the elasticity backing plate and heighten the backing plate, with the iron tie plate the elasticity backing plate and heighten the backing plate fastening together.

In one embodiment of the invention, the rigidity of the first elastic cushion plate is 5 kN/mm-50 kN/mm, and the rigidity of the second elastic cushion plate is 100 kN/mm-1000 kN/mm.

In an embodiment of the invention, one or more receiving holes are formed in the first elastic cushion plate, and each receiving hole receives one of the second elastic cushion plates.

In an embodiment of the present invention, a cross section of the first elastic cushion plate along a length direction thereof is concave, a cross section of the second elastic cushion plate along a length direction thereof is convex, and the first elastic cushion plate and the second elastic cushion plate are engaged with each other in a concave-convex manner.

In an embodiment of the invention, the track vibration damping fastener further comprises an eccentric sleeve, wherein a first through hole is formed in the iron backing plate, a second through hole is formed in the elastic backing plate, the eccentric sleeve is arranged in the first through hole and the second through hole in a penetrating manner, and the fastener penetrates through the eccentric sleeve.

In an embodiment of the invention, the track vibration damping fastener further comprises a cover plate, the cover plate is assembled above the eccentric sleeve, a third through hole is formed in a part, corresponding to the sleeve hole of the eccentric sleeve, of the cover plate, and an anti-rotation groove is formed in a part, assembled with the eccentric sleeve, of the cover plate.

In an embodiment of the invention, the cover plate includes an iron plate and elastic washers, the third through hole and the anti-rotation groove are both disposed on the iron plate, and the elastic washers are embedded in the iron plate and located on two opposite sides of the anti-rotation groove.

In an embodiment of the present invention, the rail vibration damping fastener further includes a spring washer disposed above the cover plate such that one end of the fixing member is located above the spring washer.

In one embodiment of the invention, the track vibration damping fastener further comprises an under-track elastic cushion layer, the under-track elastic cushion layer is arranged between the steel rail and the iron base plate, and the rigidity of the under-track elastic cushion layer is 150 kN/mm-300 kN/mm.

According to a second aspect of the embodiments of the present invention, there is provided another rail vibration damping fastener, including an elastic pad, the elastic pad is configured to be disposed between a steel rail and a switch tie, and the elastic pad includes a first elastic pad and a second elastic pad, wherein an upper surface of the first elastic pad is in contact with a lower surface of the steel rail, a lower surface of the second elastic pad is in contact with an upper surface of the switch tie, and a stiffness of the first elastic pad is smaller than a stiffness of the second elastic pad.

The technical scheme provided by the embodiment of the invention can have the following beneficial effects:

in the embodiment of the invention, the elastic base plates comprise a first elastic base plate and a second elastic base plate, the first elastic base plate in contact with the lower surface of the iron base plate has lower rigidity, so that lower rigidity can be provided for train operation, a track system is ensured to have enough vibration reduction elasticity, and wheel-rail impact vibration is reduced; and the rigidity of the second elastic backing plate that contacts with the upper surface of heightening backing plate is higher, on the one hand, have certain elasticity and can avoid it and the rigid contact of iron backing plate to produce vibration noise, on the other hand, in case first elastic backing plate compression deformation reaches the design value, the second elastic backing plate can also bear the load with the contact effect of iron backing plate lower part, thereby the compression deformation of the first elastic backing plate of control that can be more accurate, the deflection is in the design range when guaranteeing the rail to bear the train load, avoid the rail deflection that first elastic backing plate arouses because of producing great deformation, ripples such as evagination grinds the disease, the stability of rail has been ensured, crossing the trouble and providing smooth-going operating condition for the train, the wheel rail impact vibration has been alleviated, further play the vibration damping and noise reduction effect. In addition, because iron backing plate, heightening backing plate and elastic backing plate are fastened together by the fastener, when any part goes wrong, only need loosen the fastener and change to the problem part, also reduced the maintenance cost to a certain extent.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 shows a schematic view of a track vibration damping fastener in an exemplary embodiment of the invention;

FIG. 2 shows a schematic top view of a first resilient pad in an exemplary embodiment of the invention;

FIG. 3 shows a schematic top view of a second resilient pad directly fitted into a first resilient pad in an exemplary embodiment of the invention;

FIG. 4 is a schematic view showing an assembled structure of a first elastic pad and a second elastic pad in an exemplary embodiment of the present invention;

FIG. 5 is a schematic top view of a second resilient pad vulcanized and inlaid in the first resilient pad in an exemplary embodiment of the invention;

FIG. 6 shows a schematic view of a vulcanized insert configuration of a first resilient pad and a second resilient pad in an exemplary embodiment of the invention;

FIG. 7 is a schematic diagram of a first resilient pad and a second resilient pad vulcanized in place to form a track damping fastener according to an exemplary embodiment of the present invention;

fig. 8 is a schematic structural view illustrating a concave-convex buckling structure of a first elastic pad and a second elastic pad according to an exemplary embodiment of the invention;

fig. 9 is a schematic view illustrating a structure of a track vibration damping fastener in which a first elastic pad and a second elastic pad are engaged in a concave-convex manner according to an exemplary embodiment of the present invention;

FIG. 10 shows a schematic structural view of an iron shim plate in an exemplary embodiment of the invention;

FIG. 11 shows a schematic structural view of an eccentric sleeve in an exemplary embodiment of the present invention;

FIG. 12 shows a schematic view of the structure of a cover plate in an exemplary embodiment of the invention;

FIG. 13 shows a schematic view of the construction of an elevated shim plate in an exemplary embodiment of the present invention;

FIG. 14 is a schematic view of another alternative track cushioning fastener in an exemplary embodiment of the present invention in which a second resilient pad is mounted directly in a first resilient pad;

FIG. 15 is a schematic view of another exemplary embodiment of a track damping fastener with a second resilient pad vulcanized into the first resilient pad;

fig. 16 is a schematic structural view of another rail damping fastener in which a first elastic pad and a second elastic pad are buckled in a concave-convex manner according to an exemplary embodiment of the invention.

Reference numerals:

100. an iron backing plate; 110. a first through hole; 120. a base plate; 130. an iron seat; 200. heightening the base plate; 210. a fastener through hole; 300. an elastic backing plate; 310. a first elastic backing plate; 311. an accommodation hole; 320. a second elastic backing plate; 321. a limiting boss; 330. a second through hole; 400. a fastener; 500. a switch tie; 600. a steel rail; 700. an eccentric sleeve; 710. an upper body part; 720. a lower body part; 730. a stepped bore; 740. an anti-rotation boss; 800. a cover plate; 810. a third through hole; 820. an anti-rotation slot; 830. an iron plate; 840. a rubber gasket; 900. a spring washer; 1000. and an under-rail elastic cushion layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the invention, which are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

In this exemplary embodiment, a track dampening clip is first provided. Referring to fig. 1, the rail damper clip may include an iron shim plate 100, an heightening shim plate 200, an elastic shim plate 300, and a fastener 400. Wherein, the heightening shim plate 200 is disposed below the iron shim plate 100. The elastic pad 300 is disposed between the iron pad 100 and the heightening pad 200, and the elastic pad 300 specifically includes a first elastic pad 310 and a second elastic pad 320. The upper surface of the first elastic pad 310 is in contact with the lower surface of the iron pad 100, the lower surface of the second elastic pad 320 is in contact with the upper surface of the heightening pad 200, and the rigidity of the first elastic pad 310 is smaller than that of the second elastic pad 320. The fastening member 400 is sequentially inserted into the iron backing plate 100, the elastic backing plate 300 and the heightening backing plate 200 to fasten the iron backing plate 100, the elastic backing plate 300 and the heightening backing plate 200 together.

In the embodiment of the present invention, the resilient tie plate 300 includes the first resilient tie plate 310 and the second resilient tie plate 320, and the first resilient tie plate 310 contacting with the lower surface of the iron tie plate 100 has lower rigidity, which can provide lower rigidity for train operation, ensure that the track system has sufficient damping elasticity, and reduce the shock vibration of the wheel rail; and the rigidity of the second elastic backing plate 320 contacting with the upper surface of the heightening backing plate 200 is higher, on one hand, having certain elasticity can avoid generating vibration noise by rigid contact with the iron backing plate 100, on the other hand, once the compression deformation of the first elastic backing plate 310 reaches the design value, the second elastic backing plate 320 can also contact with the lower part of the iron backing plate 100 to bear load, thereby more accurately controlling the compression deformation of the first elastic backing plate 310, ensuring that the sinking amount of the steel rail is in the design range when bearing train load, avoiding the wave wear diseases of steel rail deflection, eversion and the like caused by greater deformation of the first elastic backing plate 310, ensuring the stability of the steel rail, providing smooth running conditions for the train crossing, relieving the impact vibration of wheel rails, and further playing a role of vibration and noise reduction. In addition, because the iron backing plate 100, the heightening backing plate 200 and the elastic backing plate 300 are fastened together by the fastener 400, when any part has a problem, the fastener is only required to be loosened to replace the problem part, and the maintenance cost is also reduced to a certain extent.

Next, each part of the above-described rail damper clip in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 13.

In order to ensure sufficient damping resilience of the rail system and reduce wheel-rail impact vibrations, the stiffness of the first resilient pad 310 may be maintained between 5kN/mm and 50kN/mm (both end values inclusive). The specific material of the first elastic cushion plate 310 may be rubber, epdm, polyurethane, or other polymer materials.

The second elastic pad 320 is required to have a certain elasticity and to bear a load of the lower portion of the iron pad 100 when the compression deformation amount of the first elastic pad 310 reaches a design value. When the rigidity of the second elastic cushion plate 320 is kept between 100kN/mm and 1000kN/mm (including two end points), the compression deformation of the first elastic cushion plate 310 can be precisely controlled, and the sinking amount of the steel rail is ensured to be within the design range when the steel rail bears the train load. The specific material of the second elastic pad 320 may be selected from various non-metallic materials such as polyethylene, rubber, polyamide, glass reinforced polyamide, and the like.

Based on the above examples, the first elastic pad 310 and the second elastic pad 320 may have various combinations of structures.

In one embodiment, referring to fig. 2, one or more receiving holes 311 are formed in the first resilient pad 310, and each receiving hole 311 receives one of the second resilient pads 320.

The shape of the receiving hole 311 is not limited in the present disclosure, and the receiving hole 311 may be a circular hole as shown in fig. 2 (a), a square hole as shown in fig. 2 (b), or a hole having another shape in other examples. Of course, regardless of the shape of the receiving hole 311, the shape of the second resilient pad 320 received therein should match the shape of the receiving hole 311. For example, when the receiving hole 311 is a circular hole shown in fig. 2 (a), the shape of the second elastic pad 320 is a cylindrical shape shown in fig. 3 (a); when the receiving hole 311 is a square hole shown in fig. 2 (b), the shape of the second elastic pad 320 is a square column shape shown in fig. 3 (b).

In a specific example, the number of the receiving holes 311 may be at least 1, and in this case, the receiving holes 311 may be located at the middle of the first elastic pad 310; as shown in fig. 2 (a) and 2 (b), one first elastic cushion plate 310 may also have 2 receiving holes, and the 2 receiving holes are distributed on two sides of the longitudinal centerline; as shown in fig. 2 (c), one first resilient mounting plate 310 may have 4 receiving holes, and the 4 receiving holes are uniformly distributed on both sides of the center line.

In one embodiment, the height of the second elastic cushion plate 320 is smaller than the height of the first elastic cushion plate 310, and the height difference is the design value Δ h of the compression deformation of the first elastic cushion plate 310, so that when the compression deformation of the first elastic cushion plate 310 reaches the design value, the load of the contact action of the lower part of the iron cushion plate 100 can be borne, the compression deformation of the first elastic cushion plate 310 can be controlled more accurately, the sinking amount of the steel rail is ensured within the design range when the steel rail bears the train load, the corrugation diseases of steel rail deflection, eversion and the like caused by the large deformation of the low-rigidity elastic cushion plate are avoided, and the stability of the steel rail is ensured.

Based on the above example, the second elastic pad 320 may be directly fitted in the receiving hole 311, as shown in fig. 1 and 4. Of course, the second elastic pad 320 may be vulcanized and embedded in the receiving hole 311, as shown in fig. 6 and 7. Specifically, when the second elastic pad 320 is vulcanized and embedded in the receiving hole 311, referring to fig. 5, an annular limiting boss 321 is disposed on a side surface of the second elastic pad 320, and the limiting boss 321 can ensure that the two have sufficient bonding strength.

In one embodiment, referring to fig. 8, the cross section of the first elastic pad 310 along the length direction thereof is concave, the cross section of the second elastic pad 320 along the length direction thereof is convex, and the first elastic pad 310 and the second elastic pad 320 are buckled in a concave-convex manner, and the overall track damping fastener structure can refer to fig. 9. In this example, when the first elastic cushion plate 310 and the second elastic cushion plate 320 are buckled in a concave-convex manner and do not bear pressure, the difference value between the highest horizontal plane of the first elastic cushion plate 310 and the highest horizontal plane of the second elastic cushion plate 320 is a design value Δ h of the compression deformation of the first elastic cushion plate 310, and thus, when the compression deformation of the first elastic cushion plate 310 reaches the design value, the load of the contact action of the lower part of the iron cushion plate 100 is borne, so that the compression deformation of the first elastic cushion plate 310 can be accurately controlled, the sinking amount of the steel rail is ensured to be within the design range when the steel rail bears the train load, wave wear defects such as deflection and eversion of the steel rail caused by large deformation of the low-rigidity elastic cushion plate are avoided, and the stability of the steel rail is ensured.

In one embodiment, the track vibration damper fastener further comprises an eccentric sleeve 700, wherein, as shown in fig. 10, a first through hole 110 is provided on the iron backing plate 100, as shown in fig. 2, a second through hole 330 is provided on the elastic backing plate 300, as shown in fig. 1, the eccentric sleeve 700 is inserted into the first through hole 110 and the second through hole 330, and the fastener 400 is inserted through the eccentric sleeve 700.

Specifically, as shown in fig. 10, the iron shim plate 100 is formed by welding, casting or forging the base plate 120 and the iron seat 130. The first through hole 110 is located on the bottom plate 120, and in order to facilitate the distance adjustment of the eccentric sleeve 700, the first through hole 110 is an oblong hole.

Referring to fig. 11, the eccentric sleeve 700 includes an upper body portion 710 and a lower body portion 720, and the inner hole is a stepped hole 730. The material of the upper body part 710 can be selected according to the load of the train, and for a low axle load and low speed train, the upper body part 710 can be made of glass fiber reinforced polyamide 66; for heavy-duty or high-speed trains, the upper body 710 is vulcanized by steel sleeves and glass fiber reinforced polyamide 66, the metal steel sleeves have strong bearing capacity, and the nonmetal glass fiber reinforced polyamide 66 can play a role in elastic buffering and insulation between the iron tie plate 100 and the fastener 400. The lower body part 720 of the eccentric sleeve 700 is a rubber gasket with the vulcanization thickness of 3 mm-8 mm, and plays a role in buffering and damping vibration.

Eccentric sleeve 700 has several functions, the first of which is to improve the stress state of fastener 400, and stepped bore 730 can reduce the height of the transverse force application point of fastener 400, avoiding or reducing the risk of shearing fastener 400. The second function is to adjust the gauge, the hole of the eccentric sleeve 700 for installing the fastener 400 has an eccentric value relative to the straight section, and the position of the base plate can be transversely changed by rotating or replacing the specification of the eccentric sleeve on the premise that the position of the fastener 400 is not changed, so that the function of adjusting the gauge of the steel rail is achieved. The third function is that the eccentric sleeve 700 directly applies the axial fastening force of the fastening element 400 to the heightening base plate 200, so that the fastening element 400 is prevented from directly acting on the elastic base plate 300, the elastic base plate 300 is prevented from being compressed when the fastening element 400 is fastened, and the elasticity can be normally exerted when a train passes through the elastic base plate.

In one embodiment, the track vibration damper fastener further includes a cover plate 800, the cover plate 800 is assembled above the eccentric sleeve 700, and referring to fig. 11 and 12, a portion of the cover plate 800 corresponding to the trepanning of the eccentric sleeve 700 is provided with a third through hole 810, and a portion of the cover plate 800 assembled with the eccentric sleeve 700 is provided with a rotation preventing groove 820, and correspondingly, a portion of the eccentric sleeve 700 assembled with the cover plate 800 is provided with a rotation preventing boss 740.

Specifically, as shown in fig. 12, the cover plate 800 includes an iron plate 830 and a rubber gasket 840. The iron plate 830 serves as a metal member directly receiving the fastening pressure of the fastener 400. The third through hole 810 is provided in the middle of the iron plate 830. The anti-rotation slot 820 is arranged on the periphery of the third through hole 810, the shape of the anti-rotation slot 820 can be square or arc, and the shape of the anti-rotation boss 740 on the eccentric sleeve 700 is matched with the shape of the anti-rotation slot 820. The rubber washers 840 are embedded in the iron plate and located on two opposite sides of the anti-rotation slots 820 to perform elastic buffering and uniformly distribute pre-tightening force of the fasteners 400, and the rigidity of the rubber washers is designed to be 0.5 kN/mm-5 kN/mm so as to ensure that the elastic base plate 300 below the iron base plate 100 is not compressed when the fasteners 400 are fastened, thereby ensuring that the pre-tightening force of the fasteners 400 does not influence the assembly rigidity of the fastener system. In addition, the anti-rotation boss 740 with an arc shape or a square shape on the eccentric sleeve 700 can be designed to match the height of the anti-rotation boss 740 and the height of the upper body 710 of the eccentric sleeve 700 according to the compression amount of the rubber washer 840 of the cover plate 800 when the fastener 400 is fastened, so as to ensure that the anti-rotation boss 740 of the eccentric sleeve 700 can be matched with the anti-rotation groove 820 of the cover plate 800 to play an anti-rotation role after the fastener 400 is fastened.

In one embodiment, the rail damping fastener further includes a spring washer 900, and the spring washer 900 is disposed above the cover plate 800 such that one end of the fixing member 400 is located above the spring washer 900. Spring washer 900 is a standard GB7244 and functions to resist loosening and absorb vibration of fastener 400.

In the rail damping clip according to this embodiment, the iron tie plate 100, the elastic tie plate 300, and the height-adjusting tie plate 200 may be fixed to the switch tie 500 by using the fastening member 400. Specifically, the fastener 400 may be a switch tie bolt, and a screw of the switch tie bolt sequentially passes through the iron base plate 100, the elastic base plate 300 and the height-adjusting base plate 200 and is screwed into a sleeve pre-embedded in the switch tie, so that the three are firmly fixed on the switch tie 500. To further stabilize the rail damper clip on the switch tie 500, 2 switch tie bolts may be used to secure the two opposing adjacent end portions, as shown in fig. 1. Of course, in other examples, the number of the fasteners 400 may be greater than 2, and the disclosure does not limit the specific values of the fasteners 400 as long as the stabilizing effect is achieved.

It will be appreciated that the length and width of the resilient pad 300 are the same as those of the iron pad 100 in order to further secure the overall stability of the track shock absorbing fastener. The length and width of the height-adjusting pad 200 may be the same as or slightly larger than those of the elastic pad 300, and the height-adjusting pad 200 may be made of high-density polyethylene or rubber plastic. In addition, as shown in fig. 13, the heightening base plate 200 may also be provided with a fastener through hole 210 for the fastener 400 to pass through, specifically, the fastener through hole 210 may be oblong, the radius of the fastener through hole is 0.5mm to 2mm larger than the radius of the fastener, and the thickness is given according to the requirements of field heightening applications. In order to facilitate the adjustment of the height of the steel rail during the construction of the turnout and solve the problem of uneven settlement of the later-stage track bed, the turnout area can be heightened between the elastic base plate 300 and the turnout sleeper 500 by adopting a heightening base plate 200. According to the height adjustment requirement, the height adjustment of the turnout is realized by increasing, decreasing or replacing the height adjustment base plates 200 with different thicknesses.

In one embodiment, as shown in fig. 1, 7 and 9, the rail vibration damper fastener further includes an under-rail elastic cushion layer 1000, the under-rail elastic cushion layer 1000 is disposed between the steel rail 600 and the iron backing plate 100, and the stiffness of the under-rail elastic cushion layer 1000 is 150 kN/mm-300 kN/mm, which may specifically be made of non-metallic materials such as rubber, polyurethane, etc. Compared with a metal material, the under-rail elastic cushion layer 1000 made of the non-metal material has certain elasticity, can improve the rigid contact between the steel rail 600 and the iron base plate 100, but the elasticity is not too large and is relatively hard, so that when a train passes through a turnout steel rail and is loaded, the rail vibration reduction fastener can still stably buckle the under-rail elastic cushion layer 1000, and the phenomenon that the buckling effect on the steel rail is weakened due to the fact that the rigidity is small and a large compression sinking amount is generated is avoided.

Also provided in this example embodiment is a rail damping clip, as shown in fig. 14, which includes an elastic pad 300, the elastic pad 300 being adapted to be disposed between a rail 600 and a switch tie 500. The resilient plate 300 includes a first resilient plate 310 and a second resilient plate 320, wherein the upper surface of the first resilient plate 310 contacts the lower surface of the rail 600, the lower surface of the second resilient plate 320 contacts the upper surface of the switch tie 500, and the rigidity of the first resilient plate 310 is less than the rigidity of the second resilient plate 320.

In the embodiment of the present application, the resilient mounting plate 300 includes the first resilient mounting plate 310 and the second resilient mounting plate 320, and the first resilient mounting plate 310 contacting with the lower surface of the steel rail 600 has lower rigidity, which can provide lower rigidity for train operation, ensure that the track system has sufficient damping elasticity, and reduce the shock vibration of the wheel rail; and the rigidity of the second elastic backing plate 320 contacting with the upper surface of the switch tie 500 is higher, on one hand, certain elasticity is provided to avoid generating vibration noise by rigid contact with the steel rail 600, on the other hand, once the compression deformation of the first elastic backing plate 310 reaches the design value, the second elastic backing plate 320 can also contact with the lower part of the steel rail 600 to bear load, thereby more accurately controlling the compression deformation of the first elastic backing plate 310, ensuring that the sinking amount of the steel rail is in the design range when bearing the train load, avoiding the wave grinding diseases of steel rail deflection, eversion and the like caused by the generation of larger deformation of the first elastic backing plate 310, ensuring the stability of the steel rail, providing smooth running conditions for the train passing a switch, relieving the impact vibration of the wheel rail, and further playing a role in vibration and noise reduction.

In the track vibration damping fastener provided in this example, the physical properties such as the structure, material, and rigidity of the first elastic pad 310 and the second elastic pad 320 are the same as those in the foregoing embodiments, and are not described herein again.

In addition, the combination of the first elastic pad 310 and the second elastic pad 320 is the same as the aforementioned embodiment. For example, fig. 14 shows a schematic view of a track damper fastener in which the second elastic pad 320 is directly fitted into the receiving hole of the first elastic pad 310; FIG. 15 shows a schematic view of a track damping clip with a second resilient pad 320 vulcanized into a receiving hole in a first resilient pad 310;

fig. 16 is a schematic view of a track vibration damper fastener in which a first elastic pad 310 and a second elastic pad 320 are engaged with each other. The specific structure of the above 3 combination modes can refer to the foregoing embodiments, and will not be described herein again.

It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A track vibration damping fastener, comprising:

an iron backing plate;

the height-adjusting base plate is arranged below the iron base plate;

2. The track dampening fastener of claim 1, wherein the first resilient backing plate has a stiffness of 5kN/mm to 50kN/mm and the second resilient backing plate has a stiffness of 100kN/mm to 1000kN/mm.

3. The track damping fastener according to claim 1, wherein the first resilient pad has one or more receiving holes formed therein, and each receiving hole receives one of the second resilient pads therein.

4. The vibration damping rail fastener according to claim 1, wherein the first elastic pad has a concave shape in cross section along a length direction thereof, the second elastic pad has a convex shape in cross section along a length direction thereof, and the first elastic pad and the second elastic pad are engaged with each other in a concave-convex manner.

5. The track damping fastener according to claim 1, further comprising an eccentric sleeve, wherein a first through hole is formed in the iron backing plate, a second through hole is formed in the elastic backing plate, the eccentric sleeve is inserted into the first through hole and the second through hole, and the fastening member is inserted through the eccentric sleeve.

6. The track vibration damping fastener according to claim 6, further comprising a cover plate, wherein the cover plate is assembled above the eccentric sleeve, a third through hole is formed in a portion of the cover plate corresponding to the sleeve hole of the eccentric sleeve, and an anti-rotation groove is formed in a portion of the cover plate assembled with the eccentric sleeve.

7. The track vibration damping fastener according to claim 6, wherein the cover plate includes an iron plate and elastic washers, the third through hole and the anti-rotation slot are disposed on the iron plate, and the elastic washers are embedded in the iron plate and located at opposite sides of the anti-rotation slot.

8. The track vibration damping fastener of claim 6, further including a spring washer disposed above the cover plate such that one end of the fixing member is above the spring washer.

9. The track damping fastener according to claim 1, further comprising an under-rail elastic cushion layer disposed between the steel rail and the iron backing plate, wherein the under-rail elastic cushion layer has a stiffness of 150kN/mm to 300kN/mm.

10. The utility model provides a track damping fastener, its characterized in that, includes the elastic backing plate, the elastic backing plate is used for setting up between rail and switch tie, the elastic backing plate includes first elastic backing plate and second elastic backing plate, wherein, the upper surface of first elastic backing plate with the lower surface of rail contacts, the lower surface of second elastic backing plate with the upper surface of switch tie contacts, just the rigidity of first elastic backing plate is less than the rigidity of second elastic backing plate.