Rigid-flexible coupling type turnout damping fastener system

Abstract

A rigid-flexible coupling type turnout damping fastener system comprises an iron base plate, an under-plate elastic cushion layer, a heightening base plate, an elastic rail brace, eccentric bushings and an under-rail elastic base plate, the eccentric bushings are inserted into oblong holes in the two ends of the iron base plate and the two ends of the under-plate elastic cushion layer, and turnout tie bolts penetrate through the eccentric bushings and then are fixed to a turnout tie; the under-plate elastic cushion layer is formed by compounding low-rigidity and high-rigidity materials, the elastic rail brace is in elastic contact with a steel rail, the track gauge is adjusted by rotating the eccentric sleeve by 180 degrees, and the transverse rigidity of the fastener system is increased through the elastic rail brace; the fastener system has small vertical rigidity and large transverse rigidity, it can be ensured that the fastener system can provide enough vibration reduction elasticity for the steel rail in the vertical direction, meanwhile, the vertical displacement can be controlled within the design range, and therefore the stability of the steel rail and the running smoothness of a train are improved; and on the other hand, the mutually assembled parts of the fastener system are designed according to the rigid-flexible coupling contact relation of metal and nonmetal, so that the impact vibration of a train on the steel rail can be buffered.

Description

Technical Field

[0001] The invention belongs to the technical field of railway turnouts, and in particular relates to a rigid-flexible coupling type turnout vibration-damping fastener system. Background Art

[0002] The prior art closest to the present invention is the invention patents "A ballastless turnout fastener system CN111535081A" and "A ballastless turnout pad fastening system CN113863060A with adjustable track gauge" previously applied by the applicant. Both of them adjust the rail gauge by moving the pad laterally through an eccentric sleeve, and the eccentric sleeve can ensure that the elastic cushion layer under the iron pad is not in direct contact with the turnout sleeper bolts, is not affected by installation and fastening, and can always exert its elasticity normally. Moreover, the above-mentioned fastener systems all achieve the vibration reduction effect by reducing the vertical stiffness. However, due to the decrease in the supporting stiffness of the rails, the rails are prone to deflection and outward turn when loaded, resulting in a mismatch between the wheel and rail, thereby exacerbating the unevenness of the track and the corrugation of the rails. In addition, the existing fastener systems have a lot of rigid contact between the parts assembled with each other, which is not conducive to buffering and improving the impact vibration of the train on the rails and resisting the expansion of the track gauge. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a rigid-flexible coupling type turnout vibration-damping fastener system.

[0004] The technical solution of the present invention is: a rigid-flexible coupling type turnout vibration damping fastener system, comprising an iron pad, an elastic pad layer under the plate, a height-adjusting pad, a turnout sleeper bolt and an elastic pad under the rail, wherein the elastic pad under the rail is arranged between the upper surface of the iron pad and the rail, the elastic pad layer under the plate is arranged below the iron pad, and the height-adjusting pad is arranged below the elastic pad layer under the plate;

[0005] The two ends of the iron pad are respectively provided with a first oblong hole, the two ends of the elastic pad under the plate are respectively provided with a second oblong hole, the two ends of the height-adjusting pad are respectively provided with a third oblong hole, and the upper and lower centers of the first oblong hole, the second oblong hole and the third oblong hole correspond to each other;

[0006] An eccentric sleeve made of non-metallic material is inserted into the first oblong hole and the second oblong hole, and the outer diameter of the eccentric sleeve is an oblong shape that matches the inner diameter of the first oblong hole; the eccentricity value between the center of the circular inner hole of the eccentric sleeve and the center of the first oblong hole is e; and an anti-rotation boss is provided on the straight section of the upper end of the eccentric sleeve;

[0007] A cover plate is provided above the eccentric sleeve, the center of the cover plate has a through hole, rubber washers are embedded on both sides of the lower end surface, and anti-rotation grooves adapted to the anti-rotation boss are provided on the lower end surfaces of the cover plate on both sides of the through hole, and the anti-rotation boss is embedded in the anti-rotation groove to form an anti-rotation function;

[0008] The switch sleeper bolts are fixed to the switch sleeper after passing through the through hole in the center of the cover plate, the circular inner hole of the eccentric sleeve and the third oblong hole in sequence, and the iron pad, the elastic pad under the plate and the two ends of the height adjustment pad are fixedly connected to the switch sleeper; by rotating the eccentric sleeve 180°, the iron pad is moved laterally by the eccentric value e, thereby achieving track gauge adjustment;

[0009] The upper surface of the iron pad is provided with a K-shaped iron seat, a rail support is fixed on the K-shaped iron seat, the side wall of the mounting slot of the rail support close to the rail is an inclined surface inclined inwardly of the track, and an adjustment wedge is embedded between the vertical surface of the K-shaped iron seat and the side wall, and the track gauge is adjusted steplessly by moving the adjustment wedge up and down; the contact surface between the rail support and the rail is provided with an elastic layer, and the legs of the rail support are provided with U-shaped elastic pads;

[0010] The elastic pad under the plate is composed of a low-rigidity elastic pad matched with the size of the iron pad and a high-rigidity elastic pad compounded on the low-rigidity elastic pad, and the high-rigidity elastic pad is located below the rail.

[0011] Preferably, the stiffness of the rubber gasket is 0.5-3 kN / mm, and the thickness is designed so that the compression relative to the upper surface of the iron pad does not exceed 1 mm when the turnout tie bolts are tightened.

[0012] Furthermore, the two ends of the elastic pad under the rail protrude downward with limiting legs, and the limiting legs straddle the iron pad along the line direction. A blocking bar is fixed on the upper surface of the iron pad along the line direction, and the blocking bar is close to the elastic pad under the rail.

[0013] Furthermore, the cross section of the adjusting wedge is a quadrilateral structure, including two right-angled sides and two oblique sides, and the height h1 of the quadrilateral structure in the vertical direction based on the two right-angled sides is greater than the thickness h2 in the horizontal direction.

[0014] Furthermore, the preferred solution 1 of the elastic pad under the plate is: the high-rigidity elastic pad is embedded in the low-rigidity elastic pad and is symmetrically distributed on both sides of the center line of the rail, and the thickness of the high-rigidity elastic pad is smaller than the thickness of the low-rigidity elastic pad by △h. After embedding, the bottom surface of the high-rigidity elastic pad is flush with the bottom surface of the low-rigidity elastic pad, and the top surface of the high-rigidity elastic pad is lower than the top surface of the low-rigidity elastic pad by △h, and this △h value is the design deformation of the low-rigidity elastic pad.

[0015] Furthermore, the preferred solution 2 of the elastic pad under the plate is that the high-rigidity elastic pad is embedded on the bottom surface of the low-rigidity elastic pad and is located directly below the rail.

[0016] Furthermore, the preferred solution 3 of the elastic pad under the plate is that the high-rigidity elastic pad is arranged as a sandwich layer in the low-rigidity elastic pad and is located directly below the rail, and is integrally formed with the low-rigidity elastic pad.

[0017] Furthermore, the height adjustment pad is composed of a left half piece and a right half piece inlaid, and the left half piece and the right half piece have a pair of semi-long circular holes on the opposite sides, and the right half piece has a boss in the middle, and the left half piece has a groove adapted to the boss in the middle, and the left half piece and the right half piece are inlaid together by embedding the boss into the groove, and the two pairs of semi-long circular holes are enclosed into two third long circular holes.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention sets a smaller vertical stiffness and a larger lateral stiffness to ensure that the fastener system can control the vertical displacement within the design range while providing sufficient vibration-damping elasticity for the rail in the vertical direction, so as to improve the stability of the rail and the smoothness of train operation; on the other hand, in order to improve the impact vibration of the train on the rail, the parts assembled in the fastener system are designed according to the rigid-flexible coupling contact relationship between metal and non-metal to avoid rigid contact between parts, which is conducive to buffering and improving the impact vibration of the train on the rail and resisting the expansion of the track gauge.

[0020] 2. The present invention arranges elastic rail supports to elastically contact the entire cross-section of the rail jaw, rail waist, and rail bottom upper surface of the rail. Under the vertical and lateral dynamic loads of the train, the elastic rail supports and the rails have a larger contact area and elasticity, which is beneficial to buffering and improving the wheel-rail interaction force and resisting the expansion of the track gauge; and under static conditions after the train passes, the thickness of the elastic layer of the rail support is restored, which is beneficial to maintaining the geometric dimensions of the track.

[0021] 3. The adjusting wedge of the present invention is installed between the vertical surface of the K-type iron seat and the inclined surface of the rail support, and the adjusting wedge is provided with two inclined surfaces of different thicknesses. In the initial state, the inclined surface of the adjusting wedge with a smaller thickness is installed between the vertical surface of the K-type iron seat and the inclined surface of the rail support; when the track gauge expands greatly due to wear of the long-term service rail, the inclined surface of the adjusting wedge with a larger thickness is installed between the vertical surface of the K-type iron seat and the inclined surface of the rail support; by moving the adjusting wedge upward or downward, the track gauge can be infinitely adjusted within the design range; and in combination with the eccentric sleeve, a wider range of track gauge adjustment can be achieved.

[0022] 4. In order to facilitate the adjustment of rail height during turnout construction and solve the problem of uneven settlement of the roadbed in the later stage, the height-adjusting pad is composed of two mosaic structures. When adjusting the height, it is only necessary to loosen the turnout sleeper bolts, and the iron pad and the elastic pad under the plate only move upward without removal. The height-adjusting pad can be smoothly inserted from both sides to realize the replacement of the thickness specification of the height-adjusting pad.

[0023] 5. The composite elastic cushion layer under the plate of the present invention is composed of two or more materials of low stiffness and high stiffness, and the high stiffness material is arranged under the rail. The low stiffness material produces strong deformation during operation and is the main provider of elasticity of the fastener system. The high stiffness material is an auxiliary material, which mainly plays a role in limiting the vertical deformation of the low stiffness material, ensuring that the sinking amount of the rail is within the design range when bearing the train load, so as to improve the stability of the rail and the smoothness of the train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0025] Figure 2 This is a top view of the structure of the iron backing plate of Example 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0027] Figure 4 This is a top view of the structure of the iron backing plate of Example 2 of the present invention;

[0028] Figure 5-10 This is a schematic diagram of the elastic cushion structure under the plate of the present invention;

[0029] Fig.11 It is a structural schematic diagram of the cover plate of the present invention;

[0030] Fig.12 It is a structural schematic diagram of the eccentric sleeve of the present invention;

[0031] Fig.13 It is a structural schematic diagram of the elastic pad under the rail of the present invention;

[0032] Fig.14 It is a structural schematic diagram of the rail support of the present invention;

[0033] Fig.15 A top view of the height-adjusting pad of the present invention;

[0034] Fig.16 It is a schematic diagram of the eccentric installation of the eccentric sleeve of the present invention;

[0035] Fig.17 It is a schematic diagram of the end surface of the adjusting wedge of the present invention;

[0036] Fig.18 for Fig.17 Top view of the . DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-18 The present invention is further described in detail with reference to the accompanying drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

[0038] Embodiment 1 of the present invention:

[0039] Figure 1 Embodiment 1 of the present invention comprises an iron pad 1, an elastic pad layer 2 under the plate, a height-adjusting pad 3, a switch sleeper bolt 4 and an elastic pad 7 under the rail, wherein the elastic pad 7 under the rail is arranged between the upper surface of the iron pad 1 and the rail 8, the elastic pad layer 2 under the plate is arranged below the iron pad 1, and the height-adjusting pad 3 is arranged below the elastic pad layer 2 under the plate;

[0040] The two ends of the iron pad 1 are respectively provided with a first oblong hole 1-1, the two ends of the elastic pad 2 under the plate are respectively provided with a second oblong hole 2-1, and the two ends of the height adjustment pad 3 are respectively provided with a third oblong hole 3-1, and the upper and lower centers of the first oblong hole 1-1, the second oblong hole 2-1 and the third oblong hole 3-1 correspond to each other;

[0041] An eccentric sleeve 6 made of non-metallic material is inserted into the first oblong hole 1-1 and the second oblong hole 2-1, and the outer diameter of the eccentric sleeve 6 is an oblong shape that matches the inner diameter of the first oblong hole 1-1; the eccentricity value between the center of the circular inner hole of the eccentric sleeve 6 and the center of the first oblong hole 1-1 is e; and an anti-rotation boss 6-1 is provided on the straight section at the upper end of the eccentric sleeve 6;

[0042] The first oblong hole 1-1 and the second oblong hole 2-1 have the same shape and size, and the third oblong hole 3-1 is smaller than the first oblong hole 1-1, so that the lower end of the eccentric sleeve 6 is seated on the height-adjusting pad 3 after being inserted; the axial tightening force of the switch sleeper bolt 4 is directly applied to the height-adjusting pad through the eccentric sleeve, thereby avoiding direct contact between the switch sleeper bolt and the elastic pad 2 under the plate, ensuring that the elastic pad 2 under the plate is not compressed when the switch sleeper bolt is tightened, and the elastic performance can be normally exerted when the train passes;

[0043] A cover plate 5 is provided above the eccentric sleeve 6, and the cover plate 5 has a through hole 5-1 in the center, and rubber washers 5-2 are embedded on both sides of the lower end surface, and anti-rotation grooves 5-3 adapted to the anti-rotation boss 6-1 are provided on the lower end surfaces of the cover plate 5 on both sides of the through hole 5-1, and the anti-rotation boss 6-1 is embedded in the anti-rotation groove 5-3 to form an anti-rotation function; preferably, the stiffness of the rubber washer 5-2 is 0.5~3kN / mm, and the thickness is designed so that the compression amount relative to the upper surface of the iron pad 1 does not exceed 1mm when the turnout sleeper bolts are tightened. The iron pad mainly bears the pressure of rails and train loads. It is only possible to move upward when the train passes the switch at high speed. However, it will immediately return to the compressed state after the train passes. The rubber gasket mainly plays a buckling and limiting role on the iron pad when the train passes the switch and vibrates upward. Therefore, the stiffness of the rubber gasket is only 0.5~3kN / mm, and the thickness is designed according to the tightening state of the switch sleeper bolts and the compression of the upper surface of the iron pad not exceeding 1mm. That is, after the switch sleeper bolts are installed in place, the rubber gasket greatly reduces the force of the switch sleeper bolts on the iron pad with smaller deformation and smaller stiffness.

[0044] The switch sleeper bolt 4 passes through the through hole 5-1 in the center of the cover plate 5, the circular inner hole of the eccentric sleeve 6 and the third oblong hole 3-1 in sequence and is fixed to the switch sleeper 16, and the two ends of the iron pad 1, the elastic pad 2 under the plate and the height adjustment pad 3 are fixedly connected to the switch sleeper 16; the eccentric sleeve 6 is used to avoid rigid contact between the iron pad and the switch sleeper bolt; two rubber washers are used to avoid rigid contact between the cover plate and the iron pad, and the eccentric sleeve 6 is rotated 180° to make the iron pad 1 move laterally by the eccentric value e, thereby achieving track gauge adjustment;

[0045] The upper surface of the iron pad 1 has a K-shaped iron seat 9 on the non-working side of the rail 8 and a common iron seat 17 on the working side of the rail 8; a rail support 10 is fixed to the K-shaped iron seat 9 by a fastener 14 (T-bolt, washer, spring bar), and the side wall 10-2 of the mounting slot 10-1 of the rail support 10 close to the rail 8 is an inclined surface inclined inwardly of the line, and an adjustment wedge 11 made of non-metallic material is embedded between the vertical surface of the K-shaped iron seat 9 and the side wall 10-2, and the track gauge is adjusted by moving the adjustment wedge 11 up and down. Stepless adjustment, and the adjusting wedge 11 is buckled by the fasteners 14 (T-bolts, washers, spring bars); the contact surface between the rail support 10 and the rail 8 is provided with an elastic layer 10-3, and the legs of the rail support 10 are provided with U-shaped elastic pads 12 to avoid rigid contact between the rail support legs and the iron pads; a non-metallic gauge block 15 is provided between the ordinary iron seat 17 and the rail 8, and the gauge block 15 is buckled on the rail 8 by the fasteners 14 (T-bolts, washers, spring bars) installed on the ordinary iron seat 17.

[0046] The sub-plate elastic pad 2 is composed of a low-rigidity elastic pad 2-2 whose size matches that of the iron pad 1 and a high-rigidity elastic pad 2-3 compounded on the low-rigidity elastic pad 2-2, and the high-rigidity elastic pad 2-3 is located below the rail 8.

[0047] Figure 3 This is Example 2 of the present invention, which is different from Example 1 in that: K-shaped iron seats 9 are provided on both sides of the rail 8 on the upper surface of the iron pad 1; rail supports 10 are fixed to the K-shaped iron seats 9 by fasteners 14 (T-bolts, washers, spring bars), and the side walls 10-2 of the mounting slots 10-1 of the rail supports 10 close to the rail 8 are inclined surfaces inclined inwardly of the track, and an adjusting wedge 11 is embedded between the vertical surface of the K-shaped iron seat 9 and the side walls 10-2, and the track gauge can be adjusted steplessly by moving the adjusting wedge 11 up and down, and the adjusting wedge 11 is buckled by the fasteners 14 (T-bolts, washers, spring bars); an elastic layer 10-3 is provided on the contact surface between the rail support 10 and the rail 8, and a U-shaped elastic pad 12 is mounted on the legs of the rail support 10.

[0048] In the above embodiment, in order to limit the movement of the elastic pad 7 under the rail along the width direction of the iron pad 1, the two ends of the elastic pad 7 under the rail have limiting legs 7-1 protruding downward, and the limiting legs 7-1 straddle the iron pad 1 along the line direction; in order to limit the movement of the elastic pad 7 under the rail along the length direction of the iron pad 1, a baffle 13 is fixed on the upper surface of the iron pad 1 along the line direction, and the baffle 13 is close to the elastic pad 7 under the rail.

[0049] In the above embodiment, in order to expand the range of the adjusting wedge for adjusting the track gauge, the cross section of the adjusting wedge 11 is a quadrilateral structure, including two right-angled sides and two oblique sides, and the height h1 of the quadrilateral structure in the vertical direction is greater than the thickness h2 in the horizontal direction based on the two right-angled sides. In the initial state, the inclined surface of the adjusting wedge with a smaller thickness (corresponding to h1) is installed between the vertical surface of the K-type iron seat and the inclined surface of the rail support; when the track gauge expands greatly due to the wear of the long-term service rail, the inclined surface of the adjusting wedge with a larger thickness (corresponding to h2) is installed between the vertical surface of the K-type iron seat and the inclined surface of the rail support; by moving the adjusting wedge upward or downward, the track gauge can be adjusted infinitely within the design range; and in combination with the eccentric sleeve, a larger range of track gauge adjustment can be achieved.

[0050] In the above embodiment, the elastic pad layer 2 under the board has the following preferred solutions:

[0051] Preferred Scheme 1 ( Figure 5 , Figure 6 As shown in the figure): the high-rigidity elastic pad 2-3 is embedded in the low-rigidity elastic pad 2-2 and is symmetrically distributed on both sides of the center line of the rail 8. The thickness of the high-rigidity elastic pad 2-3 is smaller than that of the low-rigidity elastic pad 2-2 by △h. After embedding, the bottom surface of the high-rigidity elastic pad 2-3 is flush with the bottom surface of the low-rigidity elastic pad 2-2, and the top surface of the high-rigidity elastic pad 2-3 is lower than the top surface of the low-rigidity elastic pad 2-2 by △h. This △h value is the design deformation of the low-rigidity elastic pad. When the rail bears the train load and sinks vertically to the design deformation of the low-rigidity material, the high-rigidity elastic pad bears the load, avoiding safety problems such as rail overturning and deflection caused by the low-rigidity elastic pad due to more vertical sinking, so as to ensure the safety and stability of the track structure.

[0052] Preferred Solution 2 ( Figure 7 , Figure 8 As shown): the high-rigidity elastic pad 2-3 is embedded on the bottom surface of the low-rigidity elastic pad 2-2 and is located directly below the rail 8.

[0053] Preferred Scheme 3 ( Fig. 9 , Fig.10 As shown): the high-rigidity elastic pad layer 2-3 is arranged as a sandwich layer in the low-rigidity elastic pad layer 2-2 and is located directly below the rail 8, and is integrally formed with the low-rigidity elastic pad layer 2-2.

[0054] In the above embodiment, in order to facilitate the replacement of height adjustment pads of different thicknesses and solve the problem of rail height adjustment during turnout construction and uneven roadbed settlement in the later stage, the height adjustment pad 3 is composed of a left half piece 3-1 and a right half piece 3-2, and the left half piece 3-1 and the right half piece 3-2 have a pair of semi-long circular holes 3-3 on their opposite sides, and the right half piece 3-2 has a boss 3-4 in the middle, and the left half piece 3-1 has a groove 3-5 adapted to the boss 3-4 in the middle, and the boss 3-4 is embedded in the groove 3-5 to inlay the left half piece 3-1 and the right half piece 3-2 together, and the two pairs of semi-long circular holes 3-3 are enclosed into two third long circular holes 3-1. When adjusting the height, only the turnout sleeper bolts need to be loosened, and the iron pad and the elastic pad under the plate only move upwards without removal, and the height adjustment pad can be smoothly inserted from both sides to achieve the replacement of the thickness of the height adjustment pad.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rigid-flexible coupling type turnout vibration damping fastener system, characterized in that: The invention comprises an iron pad (1), an elastic pad layer (2) under the plate, a height-adjusting pad (3), a switch sleeper bolt (4) and an elastic pad (7) under the rail, wherein the elastic pad (7) under the rail is arranged between the upper surface of the iron pad (1) and the rail (8), the elastic pad layer (2) under the plate is arranged below the iron pad (1), and the height-adjusting pad (3) is arranged below the elastic pad layer (2) under the plate; The two ends of the iron pad (1) are respectively provided with a first oblong hole (1-1), the two ends of the elastic pad layer (2) under the plate are respectively provided with a second oblong hole (2-1), and the two ends of the height-adjusting pad (3) are respectively provided with a third oblong hole (3-1), and the upper and lower centers of the first oblong hole (1-1), the second oblong hole (2-1) and the third oblong hole (3-1) correspond to each other; An eccentric sleeve (6) made of non-metallic material is inserted into the first oblong hole (1-1) and the second oblong hole (2-1), and the outer diameter of the eccentric sleeve (6) is an oblong shape that matches the inner diameter of the first oblong hole (1-1); the eccentricity value between the center of the circular inner hole of the eccentric sleeve (6) and the center of the first oblong hole (1-1) is e; and an anti-rotation boss (6-1) is provided on the straight section at the upper end of the eccentric sleeve (6); A cover plate (5) is provided above the eccentric sleeve (6), the center of the cover plate (5) is provided with a through hole (5-1), both sides of the lower end surface are embedded with rubber washers (5-2), and the lower end surfaces of the cover plate (5) on both sides of the through hole (5-1) are provided with anti-rotation grooves (5-3) adapted to the anti-rotation boss (6-1), and the anti-rotation boss (6-1) is embedded in the anti-rotation grooves (5-3) to form an anti-rotation function; The switch sleeper bolt (4) is fixed to the switch sleeper after passing through the through hole (5-1) in the center of the cover plate (5), the circular inner hole of the eccentric sleeve (6) and the third oblong hole (3-1) in sequence, and the iron pad (1), the elastic pad layer (2) under the plate and the two ends of the height adjustment pad (3) are fixedly connected to the switch sleeper (16); by rotating the eccentric sleeve (6) by 180°, the iron pad (1) is moved laterally by the eccentric value e, thereby achieving track gauge adjustment; The upper surface of the iron pad (1) is provided with a K-shaped iron seat (9), a rail support (10) is fixed on the K-shaped iron seat (9), a side wall (10-2) of the mounting slot hole (10-1) of the rail support (10) close to the steel rail (8) is an inclined surface inclined inwardly of the track, and an adjustment wedge (11) is embedded between the vertical surface of the K-shaped iron seat (9) and the side wall (10-2), and the track gauge is adjusted steplessly by moving the adjustment wedge (11) up and down; an elastic layer (10-3) is provided on the contact surface between the rail support (10) and the steel rail (8), and a U-shaped elastic pad (12) is mounted on the leg of the rail support (10); The sub-plate elastic pad (2) is composed of a low-rigidity elastic pad (2-2) whose size matches that of the iron pad (1) and a high-rigidity elastic pad (2-3) composited on the low-rigidity elastic pad (2-2), and the high-rigidity elastic pad (2-3) is located below the rail (8).

2. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The two ends of the under-rail elastic pad (7) protrude downwardly with limiting legs (7-1), and the limiting legs (7-1) straddle the iron pad (1) along the line direction; a blocking bar (13) is fixed on the upper surface of the iron pad (1) along the line direction, and the blocking bar (13) is close to the under-rail elastic pad (7).

3. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The cross section of the adjusting wedge (11) is a quadrilateral structure, including two right-angled sides and two oblique sides, and the height h1 of the quadrilateral structure in the vertical direction based on the two right-angled sides is greater than the thickness h2 in the horizontal direction.

4. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The high-rigidity elastic pad (2-3) is embedded in the low-rigidity elastic pad (2-2) and is symmetrically distributed on both sides of the center line of the rail (8). The thickness of the high-rigidity elastic pad (2-3) is smaller than the thickness of the low-rigidity elastic pad (2-2) by Δh. After embedding, the bottom surface of the high-rigidity elastic pad (2-3) is flush with the bottom surface of the low-rigidity elastic pad (2-2), and the top surface of the high-rigidity elastic pad (2-3) is lower than the top surface of the low-rigidity elastic pad (2-2) by Δh. The Δh value is the designed deformation amount of the low-rigidity elastic pad (2-2).

5. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The high-rigidity elastic cushion layer (2-3) is embedded on the bottom surface of the low-rigidity elastic cushion layer (2-2) and is located directly below the steel rail (8).

6. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The high-rigidity elastic cushion layer (2-3) is arranged as a sandwich layer in the low-rigidity elastic cushion layer (2-2) and is located directly below the rail (8), and is integrally formed with the low-rigidity elastic cushion layer (2-2).

7. The rigid-flexible coupling type turnout vibration damping fastener system according to claim 1, characterized in that: The rubber gasket (5-2) has a rigidity of 0.5-3 kN / mm and a thickness designed so that the compression relative to the upper surface of the iron pad (1) does not exceed 1 mm when the turnout sleeper bolts are in a tightened state.

8. The rigid-flexible coupling type turnout vibration damping fastener system according to any one of claims 1 to 7, characterized in that: The height-adjusting pad (3) is composed of a left half piece (3-1) and a right half piece (3-2) inlaid together. The left half piece (3-1) and the right half piece (3-2) are each provided with a pair of semi-long circular holes (3-3) on opposite sides. The right half piece (3-2) has a boss (3-4) in the middle, and the left half piece (3-1) has a groove (3-5) adapted to the boss (3-4) in the middle. The boss (3-4) is embedded in the groove (3-5), so that the left half piece (3-1) and the right half piece (3-2) are inlaid together, and the two pairs of semi-long circular holes (3-3) are enclosed to form two third long circular holes (3-1).

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