A floating slab track bed using a friction spring for shock absorption

Abstract

The present invention discloses a floating slab track bed using friction springs for shock absorption, which includes a shock absorption device and a floating slab. A number of installation holes are arranged side by side along the length direction of the floating slab. The shock absorption device is installed in the installation holes and elastically supports between the floating slab and the base, so that the floating slab is separated from the surface of the base. The shock absorption device includes a friction spring and a support mechanism. The friction spring includes an upper pressure plate, a middle pressure plate, a friction spring body, a sleeve, and a bottom plate. The friction spring body is installed in the central cavity of the sleeve. The upper part of the central cavity is internally provided with a middle pressure plate pressed on the upper part of the friction spring body. The sleeve is fixedly connected with the bottom plate. A limiting plate is fixedly arranged on the upper end surface of the sleeve. The upper pressure plate and the middle pressure plate are fixedly connected by a central bolt, and a downward pressure space is formed between the upper pressure plate and the limiting plate. The structure of the present invention is simple. Through the high-efficiency shock absorption and energy consumption of the friction spring, the vibration or impact energy is dissipated into heat energy, and it has the advantages of product maintenance-free, etc.

Description

Technical Field

[0001] The present invention relates to the field of rail transit, and in particular to a floating slab track bed using friction springs for shock absorption. Background Art

[0002] Rail transit is an important part of the urban traffic network. Urban rail transit shuttles through urban areas where citizens live. During operation, the following problems exist:

[0003] 1. Vibration effects feedback by residents and excessive noise inside the carriage;

[0004] 2. Cracks in the wiring terminals and washers of the equalizing current cables in the power supply specialty;

[0005] 3. Broken spiral spikes;

[0006] 4. Fracture of the BTM antenna bolts in the signal specialty;

[0007] 5. Problem of damaged track slabs of the track bed.

[0008] By adopting the following methods: 1. Data statistical analysis; 2. Spraying and brushing marks in frequently occurring problem sections; 3. Capturing by high-definition and high-speed cameras; 4. Dynamic displacement test of the floating slab track bed; 5. Static mechanical performance test of steel spring isolators; research and analysis show that the main cause of the above problems is wheel-rail resonance.

[0009] The function of the rail is to guide the wheels of the vehicle to move forward and bear the wheel pressure, and transfer the upper pressure downward to the track slab and the track bed through fasteners to provide the bearing requirements needed by the vehicle. It mainly bears the force from top to bottom and is not suitable for bearing obvious force from bottom to top.

[0010] The function of the floating slab track bed is to transfer the load of the floating slab and the vehicle to the isolator. The isolator bears the load and relies on its own deformation and damping to absorb vibration energy to achieve the vibration isolation effect. It will always be in the working conditions of compression, release and rebound when the vehicle passes. When releasing and rebounding, a force from bottom to top is generated.

[0011] Thus, due to the addition of the steel spring floating slab track bed, the vehicle, the rail and the connecting components will inevitably be affected by the force from bottom to top. Such working conditions will inevitably cause additional damage to the vehicle and the rail. How to improve the vibration isolation performance of the floating slab track bed has become the direction of problem solution.

[0012] Chinese patent 201710321545.6 discloses an easy-to-maintain elastic pad vibration-damping ballast bed, including an elastic pad and a track plate. The elastic pad is placed on the foundation, the track plate is placed on the elastic pad, the rail and fastener system are arranged on the track plate, the elastic pad and at least part of the track plate are embedded in the foundation, the cross-section of the track plate is basin-shaped or inverted trapezoidal, and the contour of the foundation that matches it corresponds to it. An isolation layer is arranged between the track plate and the elastic pad, and a plate lifting structure is also arranged on the track plate. This patented technology uses elastic buffer pads made of rubber material for shock absorption and buffering, which partially alleviates the vibration of the floating ballast bed system under changing dynamic load conditions, but there are problems such as poor vibration control effect and low leveling construction efficiency.

[0013] Chinese patent 201810978543.9 discloses a floating plate ballast for isolating vibrations generated during the operation of rail vehicles, which includes a floating plate and an elastic vibration isolation device, the elastic vibration isolation device is placed in a reserved installation space or a connecting sleeve set on the floating plate, and elastically supports the floating plate to separate the floating plate from the base surface, the elastic vibration isolation device includes an upper shell, a lower shell and an elastic element, the elastic element is placed between the upper shell and the lower shell, and the elastic element includes a static load support spring and a combined support spring. Although this patented technology partially alleviates the vibration of the floating ballast system under changing dynamic load conditions, it still has the problems of complex structure, easy damage, high cost, and although the energy of the vibration is isolated, this energy is not consumed, which will cause fatigue damage to other track equipment. Summary of the invention

[0014] In view of the problems existing in the prior art, the object of the present invention is to provide a floating slab track bed which has an optimized structure and excellent shock absorbing effect and uses friction springs for shock absorption.

[0015] To achieve the above object, the present invention provides a floating plate ballast bed using friction springs for shock absorption, comprising a shock absorbing device and a floating plate, wherein the floating plate is provided with a plurality of mounting holes arranged side by side along its length direction, the shock absorbing device is installed in the mounting holes and elastically supported between the floating plate and the base, so that the floating plate is separated from the surface of the base;

[0016] Among them, the vibration reduction device includes a friction spring and a supporting mechanism. The friction spring includes an upper pressure plate, a middle pressure plate, a friction spring body, a sleeve, and a bottom plate. The friction spring body is installed in the central cavity of the sleeve. The upper part of the central cavity is equipped with a middle pressure plate pressed on the upper part of the friction spring body. The sleeve is fixedly connected to the bottom plate, and a limit plate is fixedly provided on the upper end surface of the sleeve. The upper pressure plate and the middle pressure plate are fixedly connected by a center bolt, and a downward pressure space is formed between the upper pressure plate and the limit plate.

[0017] Furthermore, an outer sleeve is provided in the mounting hole, and the friction spring is mounted in the outer sleeve.

[0018] Further, the preset compression amount of the downward pressure space between the upper pressure plate and the limit plate is 2 mm.

[0019] Further, a broken spring indicator is fixedly arranged on the limit plate, and the broken spring indicator extends out of the shock absorption device through a preset mounting hole in the upper part component.

[0020] Further, a sealing plate is arranged on the side wall of the upper pressure plate and the sleeve, and the sealing plate seals the downward pressure space.

[0021] Further, the shock absorption device further includes a cover plate, the outer shapes of the cover plate and the support mechanism are adapted to the mounting hole, several support parts are arranged on the support mechanism, after the support mechanism and the friction spring are fixedly installed, the whole is installed below the mounting hole, and the floating plate is supported by the support parts.

[0022] Further, the cover plate and the support mechanism are of a polygonal structure, and the support parts are arranged at the pointed ends of the polygon of the support mechanism.

[0023] Further, a bearing block extends inwards from the upper end face of the mounting hole, several bearing blocks are arranged at intervals, after the support mechanism and the friction spring are placed into the lower part of the track from the mounting hole, the support mechanism and the friction spring are rotated 60 degrees as a whole, so that several support parts are supported on the bottom surface of the bearing block.

[0024] Further, the support mechanism includes several support mechanisms with different thicknesses to facilitate adjusting the overall support height.

[0025] Further, a rubber pad is further arranged on the upper part of the cover plate; an external cover plate is further arranged on the upper part of the rubber pad, and the external cover plate is installed in the mounting hole to seal it.

[0026] Further, a guide rail is fixedly arranged on the upper part of the floating plate, and the shock absorption device is arranged outside the guide rail.

[0027] Further, for a curved section, the floating plate as a whole is a curved structure adapted to the curved section, the base is an inclined structure, and the part located outside the curved structure is higher than the part located inside the curved structure; meanwhile, the shock absorption device elastically supports between the floating plate and the base, so that the floating plate is also in an inclined state.

[0028] Further, a rubber sealing strip is arranged between the side of the floating plate and the base.

[0029] The floating slab track bed of the present invention uses friction springs for shock absorption, with a simple structure. Through the high-efficiency vibration damping and energy dissipation of the friction springs, the vibration or impact energy is dissipated into heat energy. At the same time, it combines the advantages of springs and shock absorbers, and has the advantages of product maintenance-free, insensitive to the environment, diverse installation methods, and reducing the failure rate of surrounding equipment and facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the first embodiment of the floating slab track bed of the present invention;

[0031] Figure 2 is Figure 1 Cross-sectional view taken along line A-A in

[0032] Figure 3 Schematic diagram of the structure of the second embodiment of the floating slab track bed of the present invention;

[0033] Figure 4 is Figure 3 Cross-sectional view taken along line B-B in

[0034] Figure 5 Stereoscopic structure diagram of the shock absorption device of the present invention;

[0035] Figure 6 Split structure diagram of the shock absorption device of the present invention;

[0036] Figure 7 Front view of the shock absorption device of the present invention;

[0037] Figure 8 Top view of the shock absorption device of the present invention;

[0038] Figure 9 Cross-sectional view of the shock absorption device of the present invention;

[0039] Figure 10 Installation schematic of the shock absorption device of the present invention Figure One ;

[0040] Figure 11 Installation schematic of the shock absorption device of the present invention Figure Two ;

[0041] Figure 12 Installation schematic of the shock absorption device of the present invention Figure Three ;

[0042] Figure 13 Installation schematic of the shock absorption device of the present invention Figure Four ;

[0043] Figure 14 Installation schematic of the shock absorption device of the present invention Figure Five . DETAILED DESCRIPTION OF THE INVENTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0048] Embodiment 1:

[0049] As shown in Figure 1 、 Figure 2 、 Figures 5 to 14 , it is a floating slab track bed in a flat state. A floating slab track bed using friction springs for shock absorption in this embodiment includes a shock absorption device 22 and a floating slab 4. A plurality of mounting holes 5 are arranged side by side along the length direction of the floating slab 4. The shock absorption device 22 is installed in the mounting holes 5 and elastically supports between the floating slab 4 and the base 25, so that the floating slab 4 is separated from the surface of the base 25 and a gap 24 is formed between the floating slab 4 and the base 25. A guide rail 26 is fixedly arranged on the upper part of the floating slab 4, and the shock absorption device 22 is arranged outside the guide rail 26.

[0050] Among them, the shock absorption device 22 includes a cover plate 1, a support mechanism 2, a friction spring 3, a broken spring indicator 16, a rubber pad 18, and an external cover plate 19.

[0051] The floating slab 4 is provided with mounting holes 5, and the outer shapes of the cover plate 1, the support mechanism 2, the rubber pad 18 and the external cover plate 19 are all adapted to the mounting holes 5. In this embodiment, the mounting holes 5 are of a polygonal structure, and the cover plate 1, the support mechanism 2, the rubber pad 18 and the external cover plate 19 are also of a polygonal structure. The pointed end of the polygon of the support mechanism 2 is provided with a support portion 6. After the support mechanism 2 and the friction spring 3 are fixedly installed, they are integrally installed below the mounting holes 5, and the floating slab 4 is supported by the support portion 6. The shape of the support mechanism 2 can be set according to the use requirements, such as having 4, 5 or 6 support portions 6.

[0052] The support mechanism 2 includes a number of support units with different thicknesses to facilitate adjusting the overall support height. After the support mechanism 2 and the friction spring 3 are placed into the lower part of the track from the mounting holes 5, different thicknesses of the support mechanism are adjusted for use, so as to fill the space between the floating slab 4 and the friction spring 3 by using a number of support mechanisms 2. Further, the support mechanism 2 and the friction spring 3 are integrally rotated by 60 degrees, so that a number of support portions 6 support the bottom surface of the floating slab 4 to form the support for the floating slab 4. After the installation is completed, a cover plate 1 for covering the mounting holes 5 is arranged in the mounting holes 5. A rubber pad 18 is arranged on the upper part of the cover plate 1, and an external cover plate 19 is further arranged on the upper part of the rubber pad 18 to integrally form a sealing structure.

[0053] The friction spring 3 includes an upper pressure plate 7, a middle pressure plate 8, a friction spring body 9, a sleeve 10 and a bottom plate 11. The sleeve 10 is of a hollow structure, and a central cavity 12 is arranged therein. The friction spring body 9 is installed in the central cavity 12 of the sleeve 10. The upper part of the central cavity 12 is internally provided with a middle pressure plate 8 pressed on the upper part of the friction spring body 9. When a downward pressure is applied from above, the middle pressure plate 8 will compress the friction spring body 9 to move downward. The sleeve 10 is fixedly connected with the bottom plate 11 to form the support at the bottom. The cover plate 1, the support mechanism 2 and the upper pressure plate 7 are fixedly connected by bolts 21.

[0054] A limiting plate 13 is fixedly arranged on the upper end surface of the sleeve 10, and the limiting plate 13 is fixedly installed on the sleeve by screws. The upper pressure plate 7 and the middle pressure plate 8 are fixedly connected by a central bolt 14, and a downward pressure space 15 is formed between the upper pressure plate 7 and the limiting plate 13. The downward pressure space 15 is the operating space for the upward pressure to compress the friction spring body 9 to move downward. The preset compression amount of the downward pressure space 15 between the upper pressure plate 7 and the limiting plate 13 is 2 mm. A sealing plate 17 is arranged in a circle on the side wall of the upper pressure plate 7 and the sleeve 10, and the sealing plate 17 seals the downward pressure space 15. The sealing plate 17 is locked and installed by a clamp 20.

[0055] A broken spring indicator 16 is fixedly arranged on the limit plate 13, and the broken spring indicator 16 extends out of the shock absorption device through a preset mounting hole in the upper part. After installing the broken spring indicator 16, a marking pen can be used to mark a line 5 mm upwards along the horizontal plane. If, during use, it exceeds this marked line, it indicates that the friction spring body 9 has lost its efficacy and faults such as broken springs may occur.

[0056] During the jacking up of the floating slab and the operation of the line, to prevent sundries from entering the slab joints, rubber sealing strips 23 are arranged at the joints between the two sides of the floating slab and the tunnel wall, between the expansion joints, and between the side of the floating slab 4 and the base 25 before jacking up.

[0057] In this embodiment, in the floating slab track bed in a straight state, the upper surface of the floating slab 4 is in a horizontal state, and the shock absorption devices 22 and the friction springs 3 are both in a vertical state to provide vertical support force.

[0058] Embodiment 2:

[0059] As Figure 3 、 Figure 4 、 Figures 5 to 14 shown, it is a floating slab track bed in a curved state. A floating slab track bed using friction springs for shock absorption in this embodiment has the same overall structure as that in Embodiment 1.

[0060] In this embodiment, for the curved track section, the floating slab 4 as a whole has a curved structure adapted to the curved track section, and the base 25 is an inclined structure, with the part on the outer side of the curved structure higher than the part inside the curved structure.

[0061] Meanwhile, the shock absorption device 22 is elastically supported between the floating slab 4 and the base 25, making the floating slab 4 also in an inclined state. However, the lower surface of the floating slab 4 and the upper surface of the base 25 are still in a parallel state, and the shock absorption device 22 provides a support force perpendicular to the surface of the base 25 to ensure the centripetal force support of the guide rail 26 for the vehicle.

[0062] An observation cylinder 27 is arranged in the middle of the floating slab 4 to facilitate observing the state of the floating slab 4. A cover plate 28 for sealing is arranged at the lower opening of the observation cylinder 27 to prevent sundries from falling into the gap 24 and affecting the shock absorption effect.

[0063] For the floating slab track bed in a straight state, a first drainage ditch 29 is arranged on the base 25, and a second drainage ditch 30 is arranged on the floating slab 4. The first drainage ditch 29 is located in the middle of the base 25 and is the main drainage channel. The second drainage ditch 30 is arranged through the floating slab 4, and several second drainage ditches 30 are arranged at intervals along the length direction of the floating slab 4. The second drainage ditch 30 can quickly guide the accumulated water on the upper surface of the floating slab 4 to the first drainage ditch 29 through the gap 24 and drain it.

[0064] For the floating plate ballast in the curved state, since the floating plate 4 is in an inclined state, water will not accumulate on its upper surface, so no drainage ditch is set on the floating plate 4. In the floating plate ballast in the curved state, the first drainage ditch 29 and the third drainage ditch 31 are set on the base 25. The third drainage ditch 31 runs through the side of the base 25 and is interconnected with the space in the curved memory. The third drainage ditch 31 is set with a certain inclination, so that the accumulated water in the ballast space can be effectively drained to the first drainage ditch 29 in time for discharge.

[0065] The measurement of floating slab is an important step to monitor the actual lifting height of the floating slab and whether the floating slab maintains the original curve state after lifting. To ensure the measurement accuracy, it is generally necessary to install measuring nails at the measurement point. Reasonable arrangement of measurement points: at least 8 measurement points should be distributed on both sides of each floating slab (that is, 4 measurement points on each side); the 4 measurement points at both ends of the floating slab are about 1 meter away from the expansion joint. The remaining 4 measurement points are evenly distributed according to the distance between the measurement points at the two ends.

[0066] Before installing the measuring nails and lifting the floating plate, the original elevation of all measuring points should be measured and recorded; later, the original data will be used as a benchmark and combined with the data after lifting to convert the lifting amount of the floating plate. The accuracy of measurement is one of the key factors to ensure the quality of floating plate installation. It is recommended that the construction party should use closed measurement to re-measure and verify the measured data each time to prevent measurement and calculation errors. At the same time, it is forbidden to use the top of the rail or fasteners as the measuring point of the floating plate.

[0067] The following experimental tests were conducted on a floating slab track bed using friction springs for shock absorption:

[0068] 1. Static stiffness test: Referring to GB_T 15168-2013 "Static and dynamic performance test methods for vibration and shock isolators", the mechanical performance hysteresis curve test of the friction steel spring isolator is carried out through the MTS elastomer test bench MTS-831.10, and the force-deformation curve is drawn to verify the static stiffness and energy absorption of the friction steel spring isolator.

[0069] 2. Vibration transmissibility test: Referring to GB / T 21563-2008 "Shock and vibration test for rail transit rolling stock equipment" and GB / T 2423.10-2008 "Environmental testing for electrical and electronic products Part 2: Test method Test Fc: Vibration (sinusoidal)" standards, the vibration test unit consisting of a friction steel spring and a test fixture is subjected to a 5Hz-200Hz vertical frequency sweep vibration on a test vibration table, and the vibration transmissibility curve is collected to verify the shock absorption effect of the friction steel spring isolator at different frequencies.

[0070] 3. Shock transmissibility test: Referring to GB / T 21563-2008 "Shock and vibration test for rail transit rolling stock equipment" and GB / T 2423.5-1995 "Environmental testing for electrical and electronic products Part 2: Test method Test Ea and guidance: Shock" standards, the vibration test unit composed of a friction steel spring and a test fixture is subjected to a 10G / 6ms half-sine wave shock on a test vibration table, and the shock transmissibility curve and shock recovery time curve are collected to verify the shock resistance and recovery time of the friction steel spring isolator.

[0071] 4. Long life test: Referring to the standards of IEC61373-2010 "Railway Applications - Rolling Stock Equipment - Shock and Vibration Tests" and CJJ / T191-2012 "Technical Specifications for Floating Slab Tracks", an equivalent 25-year fatigue test is conducted on the vibration test unit consisting of a friction steel spring and a test fixture, and the hysteresis curves of the mechanical properties of the friction steel spring before and after the fatigue test are recorded.

[0072] 5. Temperature rise test: During the long-life test, the influence of long-term, high-density repeated operation friction of the equipment on the friction steel spring isolator product itself and the ambient temperature is examined.

[0073] Test conclusion:

[0074] 1. Safety and reliability of friction steel springs:

[0075] 1) With reference to IEC61373-2010 "Shock and vibration test for railway application vehicle equipment" and CJJ / T191-2012 "Technical Specifications for Floating Plate Track", a long-life test was conducted on the friction steel spring isolator. Before and after the test, the static stiffness change of the friction steel spring was less than 5%, and there was no mechanical damage, breakage or crack. The safety and reliability of the friction steel spring isolator met the ability to withstand vibration under normal environmental conditions of railway locomotives and vehicles; it complies with CJJ / T 191-2012 "Technical Specifications for Floating Plate Track" "4.2.2 The spiral steel spring shall not have visual cracks, the stiffness change shall not be greater than 10%, and the vertical permanent deformation shall be less than 2mm.

[0076] 4.2.3 After the long life test, the damping change of the steel spring isolator should not be greater than 10%".

[0077] 2) Temperature rise measurement of the friction spring isolator was carried out simultaneously with the long-life test. The test environment temperature was 20.1-22.1°C and the relative humidity was 60-62%. After 3 hours of uninterrupted testing, the product temperature reached a maximum of 34°C and remained stable. The temperature rise can meet the requirements of the subway application environment.

[0078] 2. Applicability of friction steel spring products:

[0079] 1) The mechanical properties of the friction spring isolator were tested with reference to GB_T 15168-2013 "Test methods for static and dynamic performance of vibration and shock isolators". The static stiffness curve and its hysteresis curve show that the static stiffness of the friction steel spring is 6384 (N / mm), and it exhibits a large dry friction characteristic during the compression process. A single compression can dissipate more than 60% of the dynamic energy.

[0080] 2) The test was conducted with reference to the rms value and frequency range given in GB / T 21563-2008 "Shock and vibration test for rail transit rolling stock equipment". The measured vibration transmissibility curve shows that the friction steel spring isolator has a shock absorption effect of 50% at around 27 Hz and a shock absorption effect of 97% at around 40 Hz.

[0081] 3) Referring to GB / T2423.5-1995 "Environmental testing for electrical and electronic products Part 2: Test methods Test EA and guidelines: Shock", a half-sine pulse is applied to the tested equipment. From the measured shock transmission rate curve, it can be seen that after the friction steel spring isolator is affected by a single shock wave, the shock isolation capacity is 60%, the single shock recovery time is 0.01s, and the friction steel spring is set with a preload. Therefore, after a single shock, no secondary shaking and energy accumulation occurs.

[0082] This test not only verified the safety, reliability and applicability of the friction steel spring, but also verified the "Beijing Metro Line 14# Floating Slab Roadbed Friction Spring Simulation Test Report (V1.2)". The performance of the friction steel spring vibration isolation product in the shock absorption performance and impact performance completed on the test platform is generally consistent with the conclusions of the simulation test calculations. The product safety, reliability and applicability meet the platform simulation environment and can enter the field test stage.

Claims

1. A floating slab track bed using a friction spring for shock absorption, characterized in that, It includes a vibration damping device and a floating slab. A number of mounting holes are arranged side by side along the length direction of the floating slab. The vibration damping device is installed in the mounting holes and elastically supports between the floating slab and the base, so that the floating slab is separated from the surface of the base. Among them, the vibration damping device includes a friction spring and a support mechanism. The friction spring includes an upper pressure plate, a middle pressure plate, a friction spring body, a sleeve, and a bottom plate. The friction spring body is installed in the central cavity of the sleeve. The upper part of the central cavity is internally provided with a middle pressure plate pressed on the upper part of the friction spring body. The sleeve is fixedly connected with the bottom plate. A limiting plate is fixedly arranged on the upper end surface of the sleeve. The upper pressure plate and the middle pressure plate are fixedly connected by a central bolt, and a downward pressure space is formed between the upper pressure plate and the limiting plate. The vibration damping device further includes a cover plate. A number of support parts are arranged on the support mechanism. The cover plate and the support mechanism are of a polygonal structure. The pointed ends of the polygon of the support mechanism are provided with the support parts. The upper end surface of the mounting hole extends inwards with load-bearing blocks. A number of load-bearing blocks are arranged at intervals. After the support mechanism and the friction spring are placed into the lower part of the track from the mounting hole, the support mechanism and the friction spring are rotated as a whole by 60 degrees, so that a number of the support parts are supported on the bottom surface of the load-bearing blocks.

2. The floating slab track bed using a friction spring for shock absorption as described in claim 1, characterized in that, An outer sleeve is arranged in the mounting hole, and the friction spring is installed in the outer sleeve.

3. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, The preset compression amount of the downward pressure space between the upper pressure plate and the limiting plate is 2 mm.

4. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, A broken spring indicator is fixedly arranged on the limiting plate, and the broken spring indicator extends out of the vibration damping device through a preset mounting hole in the upper part of the component.

5. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, A sealing plate is arranged in a circle on the side wall of the upper pressure plate and the sleeve, and the sealing plate seals the downward pressure space.

6. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, The outer shape of the cover plate and the support mechanism is adapted to the mounting hole. After the support mechanism and the friction spring are fixedly installed, they are integrally installed below the mounting hole, and the floating slab is supported by the support parts.

7. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, The support mechanism includes a number of support mechanisms with different thicknesses to facilitate the adjustment of the overall support height.

8. The floating slab track bed using a friction spring for shock absorption according to claim 1, wherein, A rubber pad is further arranged on the upper part of the cover plate; an external cover plate is further arranged on the upper part of the rubber pad, and the external cover plate is installed in the mounting hole to seal it.

9. The floating slab track bed using a friction spring for shock absorption as described in claim 1, wherein A guide rail is fixedly arranged on the upper part of the floating slab, and the vibration damping device is arranged outside the guide rail.

10. The floating slab track bed using a friction spring for shock absorption according to claim 1, characterized in that, For a curved section, the floating slab as a whole is a curved structure adapted to the curved section, and the base is an inclined structure, and the part located outside the curved structure is higher than the part located inside the curved structure; at the same time, the vibration damping device elastically supports between the floating slab and the base, so that the floating slab is also in an inclined state.

11. The floating slab track bed using a friction spring for shock absorption as described in claim 1, wherein, A rubber sealing strip is arranged between the side of the floating slab and the base.

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