Floating slab vibration isolator and floating slab track system with same

Abstract

The utility model discloses a floating slab vibration isolator and a floating slab track system with the floating slab vibration isolator, the floating slab vibration isolator comprises an adjusting table, the outer side of the adjusting table is provided with an external thread structure, the external thread structure can be in threaded connection with an external floating body, and the adjusting table is provided with a center hole; the base serves as a supporting foundation and is located below the adjusting table, and the base and the adjusting table are matched in an inserted and sleeved mode and can rotate synchronously; the rubber damping assembly is arranged between the adjusting table and the base and used for adjusting the distance between the adjusting table and the base; the center rod penetrates through the adjusting table and the rubber damping assembly and is detachably connected with the base, the maximum spacing distance between the adjusting table and the base can be limited by the top end of the center rod, the track system comprises floating slab vibration isolators, adapters, embedded parts and a floating slab body, the embedded parts are arranged in the floating slab body at intervals, and the adapters are detachably connected with the center rod. The adapter is detachably connected with the embedded part, the adjusting table is in threaded connection with the adapter, the vibration isolator is stable in use, parts are convenient to replace, and later maintenance is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit transportation, and particularly relates to a floating slab vibration isolator and a floating slab track system with the same. Background Technique

[0002] The vibration and noise problems caused by urban rail transit have a non-negligible impact on the lives of residents along the line and even the structural safety of the overlying buildings. The floating slab track bed system is one of the means with the strongest comprehensive performance among many existing vibration reduction track design schemes, and has been widely applied in the field of urban rail transit.

[0003] At present, the floating slab vibration isolator mainly uses the linear vibration isolation principle. With the loading of the train axle weight, the natural frequency of the vibration isolation system may gradually decrease under the action of variable mass, which may cause low-frequency resonance damage. At the same time, based on the linear vibration isolation theory, there is always an irreconcilable contradiction between the bearing capacity of the vibration isolator and the low-frequency vibration isolation performance. Therefore, based on the above characteristics, it is extremely necessary to design a floating slab vibration isolator with a gradually increasing stiffness and a fixed frequency characteristic based on the non-linear dynamics theory.

[0004] On the other hand, at present, the floating slab vibration isolator mainly includes two categories: spiral steel spring vibration isolators and rubber vibration isolators. Although the spiral steel spring vibration isolator has a high design accuracy for the vertical stiffness, it has certain difficulties in the design of the lateral stiffness and is difficult to meet the requirements of multi-directional stiffness. The rubber vibration isolator can realize the targeted design of multi-directional stiffness by designing the shape and assembly method of the rubber group, and the modular rubber group can reduce the replacement difficulty and further improve the comprehensive performance of the floating slab vibration isolator on the premise of ensuring the maintenance cost. However, when the existing rubber vibration isolator is used, the relative dislocation between the adapter plate and the base occurs, and the internal shock-absorbing parts wear too fast, which easily affects the use performance of the vibration isolator.

[0005] Chinese Patent CN201610356937.1 discloses a screw vibration isolation and shock absorption device, which realizes the effect of stepless height adjustment of the floating slab. However, its vibration isolator is only limited in the vertical direction, and the longitudinal and lateral directions cannot ensure the stable effect of the vibration isolator. Using steel springs for support cannot ensure the stiffness support of the vibration isolator in the longitudinal and lateral directions, and there will be a large shaking trend when the train passes, affecting the smoothness when the train passes.

[0006] Chinese Patent CN201610356938.6 discloses a screw shock absorber floating slab track system, its jacking equipment and jacking method, which enables the floating track slab to quickly and accurately complete the horizontal leveling and jacking actions. Similarly, its longitudinal and lateral limits are less. Moreover, when adjusting, the relative rotation between the adapter plate and the base occurs, affecting the support accuracy of the intermediate spring, and also causing the internal spring parts to consume too fast due to friction, thereby increasing the maintenance cost.

[0007] Therefore, how to provide a floating slab isolator with multi-directional stiffness support and a floating slab track system having the same is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0008] In view of this, the present utility model provides a floating slab isolator and a floating slab track system having the same, which is convenient for maintenance, stable in use, meets the use requirements of the floating slab track system, and can avoid low-frequency resonance problems by using a rubber damping component with a gradually increasing stiffness.

[0009] To achieve the above object, the present utility model adopts the following technical solutions: A floating slab isolator, comprising:

[0010] An adjustment table, an external thread structure is provided on the outer side of the adjustment table, the external thread structure can be threadedly connected to an external floating body, and a central hole is provided on the adjustment table;

[0011] A base, the base is located below the adjustment table as a support foundation, and the base is inserted and sleeved with the adjustment table and can rotate synchronously;

[0012] A rubber damping component, the rubber damping component is placed between the adjustment table and the base and realizes the distance adjustment between the adjustment table and the base; the rubber damping component is in surface contact with the adjustment table and the base respectively;

[0013] A central rod, the central rod penetrates through the adjustment table and the rubber damping component and is detachably connected to the base, and the top end of the central rod limits the maximum spacing distance between the adjustment table and the base.

[0014] The beneficial effects of the present utility model are: The stepless adjustment with the external floating body can be realized by using the external thread structure on the adjustment table. There is a certain up and down floating amount between the adjustment table and the base inserted and sleeved, for the rubber damping component to compress. In addition, the inserted and sleeved structure can rotate synchronously, playing a role in rotational limit, so that the isolator rotates synchronously as a whole during adjustment, ensuring the installation accuracy and damping performance of the internal damping components of the isolator, and also avoiding excessive wear of the damping components. The rubber damping component, adjustment table and base of the present utility model are modularly designed, and the surface support method is adopted to increase the multi-directional stiffness support effect and improve the longitudinal and transverse (corresponding to the longitudinal and transverse directions of the floating slab) stability of the isolator. The modular design of the present utility model is convenient for later maintenance and replacement of accessories. The central rod makes the isolator form a systematic whole, and can provide a multi-directional stiffness support effect in cooperation with the rubber damping component.

[0015] Preferably, a bearing tabletop is provided at the bottom of the adjustment table, the bearing tabletop abuts against the top of the rubber damping component, and a support tabletop is provided at the top of the base, and the support tabletop abuts against the bottom of the rubber damping component.

[0016] The beneficial effects of the present utility model are as follows: The bearing tabletop and the support tabletop are specially designed in cooperation with the shape of the rubber shock-absorbing components, which are convenient for disassembly and assembly, have high stability, good adaptability, and better and more stable surface support compared with line support.

[0017] Preferably, a perforated square rod protruding outward is provided in the middle of the bottom of the adjusting table, and an inner square hole for cooperating with the perforated square rod is provided in the middle of the base. The perforated square rod is slidably connected up and down in the inner square hole and rotates synchronously. There is a downward pressure gap between the top of the base and the bottom of the adjusting table, and the central rod is located in the hole of the perforated square rod.

[0018] The resulting technical effects are as follows: By using the insertion and cooperation of the perforated square rod and the inner square hole, the synchronous rotation of the adjusting table and the base can be achieved, and there are rotational limiting effects and longitudinal and lateral limiting effects. In addition, the downward displacement limit in the vertical direction (the floating plate floats up and down) is determined by the distance between the adjusting table and the base, and the vertical limiting purpose can be achieved.

[0019] Preferably, an outer sleeve extends from the bottom of the adjusting table. The inner side wall of the outer sleeve is of a square structure, and an outer square structure for cooperating with the outer sleeve is provided at the top edge of the base. The top of the base is inserted into the outer sleeve and rotates synchronously. There is a downward pressure gap between the top of the base and the bottom of the adjusting table.

[0020] The resulting technical effects are as follows: The square structure of the outer sleeve on the adjusting table cooperates with the outer square structure of the outer sleeve on the base, which has both rotational limiting effects and longitudinal and lateral limiting effects, and the vertical limit is achieved by using the downward pressure gap.

[0021] Preferably, a first staggered tooth structure is annularly provided at the bottom edge of the adjusting table, and a second staggered tooth structure is annularly provided at the top of the base. The first staggered tooth structure is inserted and matched with the second staggered tooth structure and rotates synchronously. There is a downward pressure gap between the teeth of the first staggered tooth structure and the slots of the corresponding second staggered tooth structure, and the central rod is located in the holes at the bottom of the adjusting table and the center of the base.

[0022] The resulting technical effects are as follows: The cooperation of the first staggered tooth structure and the second staggered tooth structure can achieve rotational limiting, the longitudinal and lateral limiting is achieved by using the central rod passing through the adjusting table and the base and the cooperation of the first staggered tooth and the second staggered tooth, and the vertical limit is achieved by using the upper and lower meshing gaps.

[0023] Preferably, a first cylinder structure extends from the bottom of the adjusting table. A limiting groove is provided on the inner side of the first cylinder structure, and a second cylinder structure is provided at the top of the base. A limiting block is provided on the outer side wall of the second cylinder structure. The first cylinder structure is inserted and matched on the outside of the second cylinder structure. The limiting block is slidably connected with the limiting groove and rotates synchronously. There is a downward pressure gap between the limiting block and the limiting groove.

[0024] The resulting technical effect is: longitudinal and lateral limiting is achieved by utilizing the plug-in cooperation between the first tube structure and the second tube structure, in addition, rotation limiting is achieved by utilizing the limiting groove and the limiting block, and vertical limiting is achieved by utilizing the depth of the limiting groove.

[0025] Preferably, the revolving cross-section of the bearing table is conical or zigzag, and the revolving cross-section of the supporting table is conical or linear.

[0026] The resulting technical effect is: the load-bearing table is conical or zigzag in order to match rubber shock-absorbing components of different configurations. Similarly, the supporting table is conical or straight in order to match rubber shock-absorbing components of different configurations, thereby achieving a multi-directional stiffness support effect.

[0027] Preferably, the rubber shock-absorbing component is a composite component formed by stacking rubber and steel plates, or the rubber shock-absorbing component is a composite rubber spring component, and the spring is embedded in the rubber block. When the rubber and steel plates are stacked and formed, the rotating body formed therefrom has a V-shaped structure, a folded structure and a flat structure.

[0028] The resulting technical effects are: the rubber shock-absorbing component formed by stacking rubber and steel plates has a gradually hardening stiffness characteristic, which is not the traditional single-spring linear shock-absorbing characteristic. The specific strength and stiffness requirements can be achieved by the number of stacked layers of rubber and steel plates. The composite rubber spring also has a gradually hardening stiffness characteristic. The rotating body formed by stacking rubber and steel plates has a variety of different structural forms that can be adapted to the selection; the V-shape takes into account the vertical and horizontal stiffness through the oblique arrangement of rubber, but its vertical bearing capacity is limited, which is suitable for situations where the vertical stiffness requirements are slightly smaller and a certain shear stiffness needs to be provided; the flat type provides vertical bearing stiffness through rubber, but its longitudinal and lateral limits are limited, which is suitable for situations where the vertical stiffness requirements are large; the folded type takes into account both the vertical stiffness (through the horizontal part of the rubber) and the horizontal, longitudinal and lateral stiffness (through the oblique bending part of the rubber), which is suitable for situations where both relatively large vertical stiffness and certain shear stiffness can be provided.

[0029] The utility model also discloses a floating plate track system, which includes the above-mentioned floating plate vibration isolator, an adapter, an embedded part and a floating plate body, the embedded parts are arranged at intervals inside the floating plate body, the adapter is detachably connected to the embedded parts, the adapter is a cylindrical structure and an internal thread is provided on the inner side, the adjustment platform is threadedly connected to the adapter, the base is located on the foundation and a positioning groove is provided on the base to cooperate with the foundation positioning pin.

[0030] The beneficial effect of the utility model is that the floating plate track system used in conjunction with the vibration isolator is relatively stable and can effectively avoid the low-frequency resonance problem when a train passes by.

[0031] Preferably, the embedded part is a cylindrical structure, and a plurality of bearing plates are circumferentially and spacedly distributed on the inner side wall thereof. A plurality of lapping ears are circumferentially and spacedly distributed on the outer side wall of the adapter. A screw hole is provided on the lapping ear. A support platform is provided on the outer side wall of the adapter and corresponding to the lower part of the lapping ear. The bearing plate is located between the support platform and the corresponding lapping ear. A locking bolt is connected in the screw hole, and the bottom end of the locking bolt abuts against the top surface of the bearing plate.

[0032] The resulting technical effects are as follows: The floating slab body, the embedded part and the adapter together constitute an external floating body. The threaded connection between the adjusting platform and the adapter can achieve stepless height adjustment of the external floating body. In addition, the matching use of the adapter and the embedded part makes the installation and maintenance of the vibration isolator more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an overall view of a floating slab vibration isolator of the present invention;

[0034] Figure 2 is a schematic diagram of Embodiment 1 of a floating slab vibration isolator of the present invention;

[0035] Figure 3 is a schematic diagram of Embodiment 2 of a floating slab vibration isolator of the present invention;

[0036] Figure 4 is a schematic diagram of Embodiment 3 of a floating slab vibration isolator of the present invention;

[0037] Figure 5 is a schematic diagram of Embodiment 4 of a floating slab vibration isolator of the present invention;

[0038] Figure 6 is an example of a floating slab track system of the present invention Figure 1 ;

[0039] Figure 7 is an example of a floating slab track system of the present invention Figure 2 ;

[0040] Figure 8 is an example of a floating slab track system of the present invention Figure 3 ;

[0041] Figure 9 is an example of a floating slab track system of the present invention Figure 4 ;

[0042] Figure 10 is an example of a floating slab track system of the present invention Figure 5 ;

[0043] Figure 11 is an example of a floating slab track system of the present inventionFigure 6 ;

[0044] Figure 12 This is an example of a floating slab track system of the present utility model Figure 7 ;

[0045] Figure 13 This is an example of a floating slab track system of the present utility model Figure 8 ;

[0046] Figure 14 This is an example of a floating slab track system of the present utility model Figure 9 ;

[0047] Figure 15 This is an example of a floating slab track system of the present utility model Figure 10 ;

[0048] Figure 16 This is an example of a floating slab track system of the present utility model Figure 11 ;

[0049] Figure 17 This is an example of a floating slab track system of the present utility model Figure 12 ;

[0050] Figure 18 This is an example of a floating slab track system of the present utility model Figure 13 ;

[0051] Figure 19 This is an example of a floating slab track system of the present utility model Figure 14 ;

[0052] Figure 20 This is an example of a floating slab track system of the present utility model Figure 15 ;

[0053] Figure 21 This is an example of a floating slab track system of the present utility model Figure 16 .

[0054] 1 Adjusting table, 11 Bearing tabletop, 12 Square rod with holes, 13 Outer sleeve, 14 First staggered tooth structure, 15 First cylinder structure, 151 Limiting groove, 2 Base, 21 Support tabletop, 22 Inner square hole, 23 Outer square structure, 24 Second staggered tooth structure, 25 Second cylinder structure, 251 Limiting block, 3 Rubber shock absorption component, 4 Central rod, 5 Adapter, 51 Lapping ear, 52 Support platform, 53 Locking bolt, 6 Embedded part, 61 Bearing plate, 7 Floating slab body, 8 Foundation positioning pin, 9 Foundation Detailed implementation manners

[0055] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] Example 1

[0057] See the attached Figures 1 to 2 According to an embodiment of the utility model, a floating plate isolator is characterized by comprising:

[0058] The adjusting platform 1 has an external thread structure on its outer side, which can be threadedly connected to the external floating body for stepless height adjustment. The adjusting platform 1 has a center hole; the top of the adjusting platform has a hexagonal countersunk hole for easy adjustment using tools;

[0059] Base 2, base 2 is located below the adjustment platform 1 as a supporting base, and base 2 and adjustment platform 1 plug-in sleeve cooperate and can rotate synchronously; the specific plug-in sleeve method is as follows Figure 2 As shown, a convex square rod 12 with a hole is provided in the middle of the bottom of the adjustment platform 1. The square rod can be a hexagonal rod. An inner square hole 22 (inner hexagonal hole) matching the square rod with a hole is provided in the middle of the base 2. The square rod 12 with a hole is slidably connected in the inner square hole 22 up and down to meet the up and down floating effect of the adjustment platform. The center rod 4 is located in the hole of the square rod 12 with a hole. The center rod closely connects the adjustment platform 1, the rubber shock absorbing assembly 3, and the base 2 to form an integral structure.

[0060] The rubber shock-absorbing component 3 is placed between the adjustment platform 1 and the base 2 to adjust the distance between the adjustment platform 1 and the base 2, thereby achieving the floating effect of the floating body; in this embodiment, the rubber shock-absorbing component 3 is a V-shaped rubber-steel plate laminate, and the V-shape means that the cross-section of the rotating body of the rubber shock-absorbing component is V-shaped, and the number of laminated layers needs to be determined according to system requirements;

[0061] The V-type takes into account both vertical and horizontal stiffness through the oblique arrangement of rubber, but its vertical load-bearing capacity is limited;

[0062] The central rod 4 passes through the adjustment table 1 and the rubber shock-absorbing assembly 3 and is detachably connected to the base 2. Specifically, there is a groove on the base 2 for clamping the convex block at the bottom of the central rod. The top end of the central rod 4 limits the maximum distance between the adjustment table 1 and the base 2. Specifically, there is a locking nut at the top of the central rod. The locking nut is used to limit the initial installation position of the adjustment table 1 and the base 2. In this embodiment, a conical bearing surface 11 is provided at the bottom of the adjustment table 1, and the bearing surface 11 abuts against the top of the rubber shock-absorbing assembly 3. A conical support surface 21 is provided at the top of the base 2, and the support surface 21 abuts against the bottom of the rubber shock-absorbing assembly 3. The V-shaped rubber-steel laminate plays a role in longitudinal and transverse limiting, achieving the effect of multi-directional stiffness support of the vibration isolator.

[0063] Embodiment 2

[0064] Reference appendix Figure 3 , the vibration isolator of Embodiment 2 is improved on the basis of Embodiment 1, adding a rotational limiting method. Specifically, an outer sleeve 13 extends from the bottom of the adjustment table 1. The inner side wall of the outer sleeve 13 is a hexagonal structure. An outer square structure 23 matching the outer sleeve is provided at the top edge of the base 2. The top of the base 2 is inserted into the outer sleeve 13. There is a downward pressure gap between the top of the base 2 and the bottom of the adjustment table 1, which is convenient for the compression of the rubber shock-absorbing assembly. In this embodiment, there are both longitudinal and transverse limits and vertical limits, and at the same time, the effect of rotational limiting is achieved. It is more convenient during the adjustment of the vibration isolator, effectively reducing the wear of the internal components of the vibration isolator and ensuring its adjustment accuracy.

[0065] Embodiment 3

[0066] Reference appendix Figure 4 , the vibration isolator of Embodiment 3 has a different socket structure from that of Embodiment 1. Instead of the structure of the perforated square rod for limiting, a staggered tooth structure is used for cooperation. A first staggered tooth structure 14 is provided around the bottom edge of the adjustment table 1, and a second staggered tooth structure 24 is provided around the top edge of the base 2. The first staggered tooth structure 14 is inserted and synchronously rotated with the second staggered tooth structure 24. There is a downward pressure gap between the teeth of the first staggered tooth structure 14 and the corresponding slots of the second staggered tooth structure 24. Together with the V-shaped rubber-steel laminate and the central rod 4 passing through the adjustment table 1 and the base 2, the vibration isolator simultaneously has the effects of rotational limiting, longitudinal and transverse limiting, and vertical limiting.

[0067] Embodiment 4

[0068] Reference appendix Figure 5, the socket structure of the vibration isolator in Embodiment 4 is different from that of the vibration isolator in Embodiment 1, and there is no limiting structure of the perforated square rod. The cooperation mode of the limiting groove - limiting block is used. A first cylinder structure 15 extends from the bottom of the adjusting table 1. A limiting groove 151 is provided inside the first cylinder structure 15. A second cylinder structure 25 is provided on the top of the base 2. A limiting block 251 is provided on the outer side wall of the second cylinder structure 25. Both the first cylinder structure and the second cylinder structure are cylindrical structures. The first cylinder structure 15 is adaptively inserted outside the second cylinder structure 25. The limiting block 251 is adaptively and slidably connected with the limiting groove 151, which not only plays a rotational limiting effect but also has a vertical limiting effect (determined by the depth of the limiting groove). In addition, the cooperation of the inner and outer cylinder structures itself has a longitudinal and transverse limiting effect, and together with the V-shaped rubber-steel laminate, the vibration isolator is more stable during use and has a significant anti-sway effect, thus ensuring the high smoothness of the track system.

[0069] In addition, in addition to the V-shaped rubber-steel laminate, the rubber damping component also has a folded structure (refer to the appendix Figure 7 ) and a flat structure (refer to the appendix Figure 8 ); of course, rubber damping components of different configurations need to be used in combination with corresponding-shaped (conical table, folded surface table) bearing surfaces 11 and support surfaces 21 (conical table, flat table).

[0070] In some other embodiments, the rubber damping component uses a composite rubber spring element, refer to the appendix Figure 9 .

[0071] In addition, the present utility model also discloses a floating slab track system, refer to the appendix Figures 6 - 21 , which includes the above-mentioned floating slab vibration isolator, adapter 5, embedded part 6 and floating slab body 7. The embedded parts 6 are arranged at intervals inside the floating slab body 7. The adapter 5 is detachably connected to the embedded part 6. The adapter 5 is a cylinder structure and has an internal thread inside. The adjusting table 1 is threadedly connected to the adapter 5, which is convenient for stepless height adjustment. The base 2 is located on the foundation 9 and a positioning groove for cooperating with the foundation positioning pin 8 is provided on the base. It can limit the installation positions of the vibration isolator and the floating slab.

[0072] In some other embodiments, the embedded part 6 is a cylinder structure and multiple bearing plates 61 are circumferentially and spacedly distributed on the inner side wall thereof. Multiple overlapping ears 51 are circumferentially and spacedly distributed on the outer side wall of the adapter 5. A screw hole is provided on the overlapping ear 51. A support table 52 is provided on the outer side wall of the adapter 5 and below the corresponding overlapping ear. The bearing plate 61 is located between the support table 52 and the corresponding overlapping ear 51. A locking bolt 53 is connected in the screw hole and the bottom end of the locking bolt abuts against the top surface of the bearing plate 61.

[0073] Among them, the appendix Figure 6 is an application example of the perforated square rod and the inner square hole with rotational limit combined with the V-shaped rubber damping component;

[0074] Appendix Figure 7 It is an application example of a square rod with holes and a rotating limit under an inner square hole, combined with a folded rubber shock-absorbing component;

[0075] Appendix Figure 8 It is an application example of a square rod with holes and a rotating limit under an inner square hole, combined with a flat rubber shock-absorbing component;

[0076] Appendix Figure 9 It is an application example of a square rod with holes and a rotating limit under an inner square hole, combined with a composite rubber spring component;

[0077] Appendix Figure 10 It is an application example of the first staggered tooth structure and the second staggered tooth structure engaging to achieve rotating limit, combined with a V-shaped rubber shock-absorbing component;

[0078] Appendix Figure 11 It is an application example of the first staggered tooth structure and the second staggered tooth structure engaging to achieve rotating limit, combined with a folded rubber shock-absorbing component;

[0079] Appendix Figure 12 It is an application example of the first staggered tooth structure and the second staggered tooth structure engaging to achieve rotating limit, combined with a flat rubber shock-absorbing component;

[0080] Appendix Figure 13 It is an application example of the first staggered tooth structure and the second staggered tooth structure engaging to achieve rotating limit, combined with a composite rubber spring component;

[0081] Appendix Figure 14 It is an application example of the first cylinder structure and the second cylinder structure nesting to achieve rotating limit, combined with a V-shaped rubber shock-absorbing component;

[0082] Appendix Figure 15 It is an application example of the first cylinder structure and the second cylinder structure nesting to achieve rotating limit, combined with a folded rubber shock-absorbing component;

[0083] Appendix Figure 16 It is an application example of the first cylinder structure and the second cylinder structure nesting to achieve rotating limit, combined with a flat rubber shock-absorbing component;

[0084] Appendix Figure 17 It is an application example of the first cylinder structure and the second cylinder structure nesting to achieve rotating limit, combined with a composite rubber spring component;

[0085] Appendix Figure 18 It is an application example of a double rotating limit of a square rod with holes + an outer sleeve, combined with a V-shaped rubber shock-absorbing component;

[0086] Appendix Figure 19 It is an application example of a double rotating limit of a square rod with holes + an outer sleeve, combined with a folded rubber shock-absorbing component;

[0087] Appendix Figure 20It is an application example of double rotation limit of a perforated square rod + outer sleeve and combination with a flat rubber shock absorption component;

[0088] Appendix Figure 21 It is an application example of double rotation limit of a perforated square rod + outer sleeve and combination with a composite rubber spring component.

[0089] In addition, the fixed-frequency non-linear restoring force curve can ensure that the vibration isolator can maintain a constant natural frequency under the action of a variable-mass impact load, and ensure that the vibration isolator has the same vibration isolation performance within a specified displacement stroke range; the external thread of the adapter plate can achieve high-precision stepless adjustment of the initial height of the vibration isolator, avoid the decrease of the vibration isolation performance caused by the sensitivity of the non-linear mechanical characteristics of the vibration isolator to the initial conditions, and at the same time ensure the accuracy of the floating slab jacking.

[0090] The parameter design of the specific vibration isolator is as follows:

[0091] Step 1: Based on the wheel-rail load characteristics of the train operation state, determine the threshold frequency for decoupling the quasi-static and dynamic loads of the vibration isolator load spectrum, and determine the lower frequency limit of the dynamic excitation load energy of the vibration isolator according to the energy distribution frequency band of the dynamic component;

[0092] Furthermore, the method for determining the lower frequency limit of the dynamic excitation load energy of the vibration isolator includes the following steps:

[0093] Step 1.1: Calculate the lower frequency limit of the dynamic excitation load energy of the vibration isolator according to the following formula, denoted as f:

[0094]

[0095] Among them, v represents the train operation speed, and L represents the bogie spacing of the vehicle.

[0096] Step 2: Calculate the equivalent initial static load mass of a single vibration isolator according to the layout form of the floating slab - vibration isolator array;

[0097] Furthermore, the equivalent initial static load mass of a single vibration isolator includes the following steps:

[0098] Step 2.1: Determine the mass of a single floating slab according to the configuration of a single floating slab, denoted as m s ;

[0099] Step 2.2: Determine the mass of a single rail matching the longitudinal length of a single floating slab according to the following calculation formula, denoted as m r :

[0100] m r = ρSL (0.2)

[0101] Among them, ρ represents the rail mass density, S represents the longitudinal cross-sectional area of the rail, and L represents the longitudinal length of a single floating slab.

[0102] Step 2.3: Determine the total mass of the fasteners assembled on a single floating slab, denoted as m, according to the following calculation formula f :

[0103]

[0104] where n f represents the number of fasteners assembled on a single floating slab, and represents the mass of a single fastener.

[0105] Step 2.4: Calculate the total static load mass of a single floating slab, denoted as m, based on the mass of a single floating slab, the mass of a single rail matched with the longitudinal length of a single floating slab, and the total mass of the fasteners assembled on a single floating slab, according to the following calculation formula

[0106] m = m s + 2m r + m f (0.4)

[0107] Step 2.5: Calculate and determine the equivalent initial static load mass of a single isolator, denoted as m0, according to the following formula

[0108]

[0109] where n represents the number of isolators assembled under a single floating slab.

[0110] Step 3: Use the design method of a fixed-frequency restoring force curve with a stiffness-hardening characteristic to analyze and design a nonlinear restoring force curve

[0111] Furthermore, the calculation of the analyzed nonlinear restoring force curve includes the following steps

[0112] Step 3.1: Calculate the natural frequency of the fixed-frequency isolator, denoted as ω0, based on the lower limit of the dynamic excitation load energy frequency of the isolator, according to the following formula

[0113]

[0114] where π ≈ 3.14159 represents the pi.

[0115] Step 3.2: Determine the restoring force analytical function of the fixed-frequency isolator according to the following formula

[0116]

[0117] where e ≈ 2.71828 is the natural constant, and x represents the vertical displacement of the isolator adjustment platform.

[0118] Step 4: Design a non - linear damping coefficient curve with optimal matching performance based on the non - linear restoring force curve with a gradually stiffening characteristic.

[0119] For the non - linear damping design of the stiffness characteristic of a non - linear gradually stiffening stiffness isolator, the damping ratio should be restricted within the range of not less than 5% and not more than 25%. Therefore, the design rules for the variation law of the damping coefficient of the non - linear gradually stiffening stiffness system are as follows:

[0120] 1) When the equivalent stiffness of the non - linear gradually stiffening stiffness system reaches the maximum value, the damping ratio of the system is selected as 25%; the non - linear gradually stiffening stiffness system refers to the floating slab system equipped with isolators with gradually stiffening stiffness characteristics.

[0121] 2) When the equivalent stiffness of the non - linear gradually stiffening stiffness system is equal to the stiffness of the existing linear system, the damping coefficient of the system is selected as the same damping coefficient of 16000 Ns / m as that of the existing steel spring floating slab isolator;

[0122] 3) When the equivalent stiffness of the non - linear gradually stiffening stiffness system reaches the minimum value, the damping ratio of the system is selected as 5%;

[0123] 4) The damping coefficients at other positions are determined by fitting using the cubic polynomial interpolation method based on the key points mentioned above in the displacement - damping coefficient plane;

[0124] 5) The conversion relationship between the damping ratio and the damping coefficient is determined according to the following formula:

[0125]

[0126] Among them, ζ represents the damping ratio, C represents the damping coefficient, and k represents the equivalent static stiffness of the isolator at any position within the allowable formation range.

[0127] 6) The equivalent static stiffness of the isolator at any position within the allowable formation range is determined according to the following formula:

[0128]

[0129] Based on the characteristic that the stiffness gradually stiffens with displacement, according to the force - displacement curve relationship, this method restricts the displacement peak at the maximum load, and at the same time ensures that the floating slab vibration isolation track system has a constant natural frequency at any variable mass load position, providing a new solution for the design of high - performance floating slab passive isolators with both displacement suppression and low - frequency vibration isolation requirements.

[0130] A design method of a gradually hardening non-linear restoring force curve with fixed-frequency characteristics provided by the present utility model utilizes the characteristic that the stiffness of a vibration isolator changes with displacement. According to this characteristic, a vibration isolator can be designed such that the peak value of displacement is limited when bearing the maximum load. Meanwhile, the floating slab vibration damping track system has a constant natural frequency at any position of variable mass load, which can ensure good low-frequency isolation performance of the system before and after being impacted by a vehicle.

[0131] In addition, combined with the non-linear stiffness characteristic of the floating slab vibration damping track system, a non-linear damping coefficient curve with optimal matching ability is designed, which can better meet the vibration requirements of the system. This new vibration isolator design scheme can meet the requirements of the urban rail transit field for simultaneously controlling displacement and low-frequency vibration, while ensuring the effect of the system on vertical low-frequency dynamics, thereby achieving a better track displacement control effect.

[0132] A non-linear rubber vibration isolator provided by the present utility model utilizes a modular rubber group to conveniently achieve different vertical stiffnesses of the vibration isolator by changing the stacking layers, so as to cope with different track conditions and ensure the vertical vibration isolation performance of the vibration isolator; the external thread of the adapter table can achieve high-precision stepless adjustment of the initial height of the vibration isolator, avoiding the decline of the vibration isolation performance caused by the sensitivity of the non-linear mechanical characteristics of the vibration isolator to the initial conditions, and at the same time ensuring the accuracy of the floating slab lifting.

[0133] For the devices and usage methods disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, refer to the description in the method section.

[0134] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A floating plate isolator, characterized in that: include: An adjustment platform (1), wherein an external thread structure is provided on the outer side of the adjustment platform (1), wherein the external thread structure can be threadedly connected to an external floating body, and a center hole is provided on the adjustment platform (1); A base (2), the base (2) being located below the adjustment platform (1) as a supporting base, the base (2) and the adjustment platform (1) being plug-in-matched and being able to rotate synchronously; A rubber shock absorbing component (3), the rubber shock absorbing component (3) being placed between the adjustment platform (1) and the base (2) and realizing distance adjustment between the adjustment platform (1) and the base (2), the rubber shock absorbing component (3) being in surface contact with the adjustment platform (1) and the base (2) respectively; A center rod (4), the center rod (4) passes through the adjustment platform (1) and the rubber shock-absorbing assembly (3) and is detachably connected to the base (2), and the top end of the center rod (4) limits the initial installation distance between the adjustment platform (1) and the base (2).

2. A floating plate isolator according to claim 1, characterized in that: The bottom of the adjustment platform (1) is provided with a bearing surface (11), and the bearing surface (11) abuts against the top of the rubber shock-absorbing component (3); the top of the base (2) is provided with a supporting surface (21), and the supporting surface (21) abuts against the bottom of the rubber shock-absorbing component (3).

3. A floating plate isolator according to claim 2, characterized in that: An outwardly protruding square rod (12) with a hole is provided in the middle of the bottom of the adjustment platform (1); an inner square hole (22) matching the square rod with a hole is provided in the middle of the base (2); the square rod (12) with a hole is slidably connected in the inner square hole (22) up and down and rotates synchronously; a downward pressure gap is provided between the top of the base (2) and the bottom of the adjustment platform (1); and the center rod (4) is located in the hole of the square rod with a hole (12).

4. A floating plate isolator according to claim 3, characterized in that: An outer sleeve (13) extends from the bottom of the adjustment platform (1), the inner side wall of the outer sleeve (13) is a square structure, the top edge of the base (2) is provided with an outer square structure (23) matching the outer sleeve, the top of the base (2) is inserted into the outer sleeve (13) and rotates synchronously, and there is a downward pressure gap between the top of the base (2) and the bottom of the adjustment platform (1).

5. A floating plate isolator according to claim 2, characterized in that: The bottom edge of the adjustment platform (1) is provided with a first staggered tooth structure (14), and the top of the base (2) is provided with a second staggered tooth structure (24). The first staggered tooth structure (14) and the second staggered tooth structure (24) are adapted to be plugged and synchronously rotated. There is a downward pressure gap between the teeth of the first staggered tooth structure (14) and the corresponding grooves of the second staggered tooth structure (24). The center rod (4) is located in a hole in the center of the adjustment platform (1) and the base (2).

6. A floating plate isolator according to claim 2, characterized in that: A first cylinder structure (15) extends from the bottom of the adjustment platform (1), a limiting groove (151) is provided on the inner side of the first cylinder structure (15), a second cylinder structure (25) is provided on the top of the base (2), a limiting block (251) is provided on the outer side wall of the second cylinder structure (25), the first cylinder structure (15) is adapted to be plugged into the outer side of the second cylinder structure (25), the limiting block (251) and the limiting groove (151) are adapted to be slidably connected and rotate synchronously, and a downward pressure gap is provided between the limiting block (251) and the limiting groove (151).

7. A floating plate isolator according to any one of claims 4 to 6, characterized in that: The revolving cross section of the bearing table (11) is conical or folded line-shaped, and the revolving cross section of the supporting table (21) is conical or straight line-shaped.

8. A floating plate isolator according to claim 7, characterized in that: The rubber shock-absorbing component (3) is a composite component formed by stacking rubber and steel plates, or the rubber shock-absorbing component (3) is a composite rubber spring component, the spring is embedded in the rubber block, and when the rubber and steel plates are stacked and formed, the rotating body formed has a V-shaped structure, a folded structure and a flat structure.

9. A floating plate track system, characterized in that: It comprises the floating plate isolator as claimed in claim 8, an adapter (5), an embedded part (6) and a floating plate body (7), wherein the embedded parts (6) are arranged at intervals inside the floating plate body (7), the adapter (5) is detachably connected to the embedded part (6), the adapter (5) is a cylindrical structure and has an internal thread on its inner side, the adjustment platform (1) is threadedly connected to the adapter (5), and the base (2) is located on the foundation (9) and has a positioning groove on the base that matches the foundation positioning pin (8).

10. A floating slab track system according to claim 9, characterized in that: The embedded part (6) is a cylindrical structure and a plurality of bearing plates (61) are circumferentially spaced apart on the inner wall thereof; a plurality of lap ears (51) are circumferentially spaced apart on the outer wall of the adapter (5); the lap ears (51) are provided with screw holes; a support platform (52) is provided on the outer wall of the adapter (5) and below the corresponding lap ears; the bearing plate (61) is located between the support platform (52) and the corresponding lap ears (51); a locking bolt (53) is connected in the screw hole and the bottom end of the locking bolt is tightly pressed against the top surface of the bearing plate (61).

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