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 smoothness of train operation 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 utility model 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 utility model patents previously applied for by the present applicant, "A Ballastless Turnout Fastener System CN111535081A" and "A Ballastless Turnout Pad Fastening System CN113863060A with Adjustable Gauge". Both use eccentric sleeves to adjust the rail gauge by allowing the pads to move laterally, and the eccentric sleeves can ensure that the elastic cushion layer under the iron pads does not directly contact the turnout tie bolts, is not affected by installation and fastening, and can always exert its elasticity normally. Moreover, the above-mentioned fastener systems all achieve vibration reduction effects by reducing vertical stiffness. However, due to the decrease in rail support stiffness, 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 rail corrugation. 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 gauge expansion. Summary of the Invention

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

[0004] The technical solution of the utility model is: a rigid-flexible coupling type turnout vibration damping fastener system, comprising an iron pad, an elastic pad under the plate, a height adjustment pad, a turnout tie 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 under the plate is arranged below the iron pad, and the height adjustment pad is arranged below the elastic pad 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, and the two ends of the height adjustment 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 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 cover plate has a through hole in the center, and rubber washers are embedded on both sides of the lower end surface, and anti-rotation grooves adapted to the anti-rotation bosses are provided on the lower end surfaces of the cover plate on both sides of the through hole, and the anti-rotation bosses are embedded in the anti-rotation grooves to form an anti-rotation function;

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

[0009] The upper surface of the iron base plate has a K-shaped iron seat, on which a rail support is fixed. The side wall of the rail support's mounting slot near the rail is an inclined surface inclined inwardly toward the track, and an adjustment wedge is embedded between the vertical surface of the K-shaped iron seat and the side wall. The track gauge is adjusted by moving the adjustment wedge up and down to achieve stepless adjustment. The contact surface between the rail support and the rail has an elastic layer, and the legs of the rail support are covered with U-shaped elastic pads.

[0010] The elastic pad under the plate is composed of a low-rigidity elastic pad that matches the size of the iron pad and a high-rigidity elastic pad that is composited 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 to 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 adjustment 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. 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 provides a smaller vertical stiffness and a larger lateral stiffness to ensure that the fastener system provides sufficient vertical vibration-damping elasticity for the rail while controlling the vertical displacement within the design range, thereby improving the stability of the rail and the smoothness of train operation. On the other hand, 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, avoiding rigid contact between parts, which is conducive to buffering and improving the impact vibration of the train on the rail and resisting gauge expansion.

[0020] 2. The utility model provides an elastic rail support that is in full-section elastic contact with 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 support and the rail have a larger contact area and elasticity, which is beneficial for buffering and improving the wheel-rail interaction force and resisting the expansion of the track gauge. Moreover, under static conditions after the train passes, the thickness of the elastic layer of the rail support is restored, which is beneficial for maintaining the geometric dimensions of the track.

[0021] 3. The adjusting wedge of the utility model 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 gauge of the rail is greatly expanded due to wear of the rails in long-term service, 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 utility model 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 pad under the plate of the utility model is composed of two or more materials of low stiffness and high stiffness, and the high stiffness material is arranged under the rail. During operation, the low stiffness material produces strong deformation and is the main provider of elasticity of the fastener system. The high stiffness material is an auxiliary material, which mainly plays the role of limiting the vertical deformation of the low stiffness material, ensuring that the sinking amount of the rail when bearing the train load is within the design range, 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 structural diagram of Example 1 of the present utility model;

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

[0026] Figure 3 This is a schematic structural diagram of Example 2 of the present utility model;

[0027] Figure 4 This is a top view of the structure of the iron pad in Example 2 of the present utility model;

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

[0029] Figure 11 This is a schematic structural diagram of the cover plate of the utility model;

[0030] Figure 12 This is a schematic structural diagram of the eccentric sleeve of the utility model;

[0031] Figure 13 This is a structural diagram of the elastic pad under the rail of the utility model;

[0032] Figure 14 This is a schematic structural diagram of the rail support of the utility model;

[0033] Figure 15 This is a top view of the height-adjusting pad of the utility model;

[0034] Figure 16 This is a schematic diagram of the eccentric installation of the eccentric sleeve of the utility model;

[0035] Figure 17 This is a schematic diagram of the end face of the adjusting wedge of the utility model;

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

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

[0038] Embodiment 1 of the present utility model:

[0039] Figure 1 The utility model is implemented in Example 1, which includes an iron plate 1, an elastic pad 2 under the plate, a height-adjusting plate 3, a switch tie bolt 4, and an elastic pad 7 under the rail. The elastic pad 7 under the rail is arranged between the upper surface of the iron plate 1 and the rail 8, the elastic pad 2 under the plate is arranged below the iron plate 1, and the height-adjusting plate 3 is arranged below the elastic pad 2 under the plate.

[0040] The two ends of the iron plate 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 plate 3 are respectively provided with a third oblong hole, and the upper and lower centers of the first oblong hole 1-1, the second oblong hole 2-1 and the third oblong hole 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 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 of 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 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 tie bolt 4 is directly applied to the height-adjusting pad through the eccentric sleeve, thereby avoiding direct contact between the switch tie bolt and the elastic pad 2 under the plate, ensuring that the elastic pad 2 under the plate is not compressed when the switch tie 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 switch sleeper bolts are tightened. The iron plate 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 plate 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 tie bolts and the compression of the upper surface of the iron plate not exceeding 1mm. That is, after the switch tie bolts are installed in place, the rubber gasket greatly reduces the force of the switch tie bolts on the iron plate with smaller deformation and smaller stiffness.

[0044] The switch sleeper bolt 4 is sequentially passed 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, and then fixed to the switch sleeper 16, fixing the iron plate 1, the elastic pad 2 under the plate, and the two ends of the height adjustment plate 3 to the switch sleeper 16; the eccentric sleeve 6 is used to prevent the iron plate from rigidly contacting the switch sleeper bolt; two rubber washers are used to prevent the cover plate from rigidly contacting the iron plate, and by rotating the eccentric sleeve 6 180°, the iron plate 1 is laterally moved by the eccentric value e, thereby achieving track gauge adjustment;

[0045] The upper surface of the iron plate 1 has a K-shaped iron seat 9 on the non-working side of the rail 8 and an ordinary 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 mounting slot 10-1 of the rail support 10 is close to the side wall 10-2 of the rail 8 and is inclined toward the inside of the track, 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 has an elastic layer 10-3, and the legs of the rail support 10 are fitted 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 that is adapted to the size 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.

[0047] Figure 3 This is Example 2 of the present utility model, which differs 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 base plate 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 adjustment 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 adjustment wedge 11 up and down, and the adjustment 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 provided 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 protrude downward with limiting legs 7-1, 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 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 elastic pad 7 under the rail.

[0049] In the above embodiment, to expand the range of track gauge adjustment of the adjusting wedge, the cross-section of the adjusting wedge 11 is a quadrilateral structure, comprising two right-angled sides and two oblique sides. The vertical height h1 of the quadrilateral, relative to the two right-angled sides, is greater than the horizontal thickness h2. Initially, the adjusting wedge's thinner inclined surface (corresponding to h1) is installed between the vertical surface of the K-shaped iron seat and the inclined surface of the rail support. When the track gauge expands significantly due to long-term rail wear, the thicker inclined surface (corresponding to h2) is installed between the vertical surface of the K-shaped 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 designed range. In conjunction with the eccentric sleeve, a wide 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 Option 1 ( Figure 5 、 Figure 6As shown): 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 △h less than that of the low-rigidity elastic pad 2-2. 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 excessive vertical sinking of the low-rigidity elastic pad, thereby ensuring the safety and stability of the track structure.

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

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

[0054] In the above embodiment, to facilitate the replacement of height adjustment plates of different thicknesses and specifications, and to address the issues of rail height adjustment during turnout construction and uneven roadbed settlement in the later stages, the height adjustment plate 3 is constructed by inlaying a left half 3-1 and a right half 3-2. Each of the left and right halves 3-1, 3-2 has a pair of semi-elliptical holes 3-3 on opposing sides, and the right half 3-2 has a boss 3-4 in the middle, while the left half 3-1 has a groove 3-5 in the middle that matches the boss 3-4. The boss 3-4 engages the groove 3-5, joining the left and right halves 3-1, 3-2 together, and enclosing the two pairs of semi-elliptical holes 3-3 into two third elongated holes. To adjust the height, simply loosen the turnout tie bolts. The iron pad and the elastic cushion beneath the plate simply move upward without removal, allowing the height adjustment plate to be smoothly inserted from both sides, enabling the thickness of the height adjustment plate to be changed.

[0055] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A rigid-flexible coupling type turnout vibration damping fastener system, characterized by: It comprises an iron pad (1), an elastic pad layer under the plate (2), a height-adjusting pad (3), a switch sleeper bolt (4) and an elastic pad under the rail (7), wherein the elastic pad under the rail (7) is arranged between the upper surface of the iron pad (1) and the rail (8), the elastic pad layer under the plate (2) is arranged below the iron pad (1), and the height-adjusting pad (3) is arranged below the elastic pad layer under the plate (2); 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-adjusting pad (3) are respectively provided with a third oblong hole, and the upper and lower centers of the first oblong hole (1-1), the second oblong hole (2-1) and the third oblong hole 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 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 of the upper end of the eccentric sleeve (6); A cover plate (5) is provided above the eccentric sleeve (6), the cover plate (5) having a through hole (5-1) in the center, rubber washers (5-2) 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 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 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 degrees, the iron pad (1) is moved laterally by the eccentric value e, thereby achieving track gauge adjustment; The upper surface of the iron base plate (1) has a K-shaped iron seat (9), and a rail support (10) is fixed on the K-shaped iron seat (9). The side wall (10-2) of the mounting slot hole (10-1) of the rail support (10) close to the rail (8) is an inclined surface inclined inwardly toward the line, and an adjustment wedge (11) is embedded between the vertical surface of the K-shaped iron seat (9) and the side wall (10-2). The track gauge is adjusted steplessly by moving the adjustment wedge (11) up and down; the contact surface between the rail support (10) and the rail (8) has an elastic layer (10-3), and the legs of the rail support (10) are covered with U-shaped elastic pads (12); 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: Limiting legs (7-1) protrude downwards from both ends of the under-rail elastic pad (7), and the limiting legs (7-1) straddle the iron pad (1) along the line direction. A blocking bar (13) is fixed to 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 adjustment 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 design deformation 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 within 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 stiffness of 0.5 to 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 tie bolts are tightened.

8. The rigid-flexible coupling turnout vibration damping fastener system according to any one of claims 1 to 7, characterized in that: The height adjustment 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) each have a pair of semi-long circular holes (3-3) on their 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.

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