Adaptive rubber spring vibration isolator and track slab floating track bed

Abstract

An adaptive rubber spring vibration isolator is clamped between an outer sleeve of a track plate and a foundation, comprises two cover plates and a rubber spring clamped between the two cover plates, and is characterized in that at least one cover plate is in spherical fit with the rubber spring, so that the cover plates can rotate relative to the rubber spring to adapt to an included angle between the track plate and the foundation. The vibration isolator can adapt to the ground condition to form horizontal supporting on the track plate, is high in bearing reliability, improves the supporting reliability of the vibration isolator on the track plate and the vibration isolation effectiveness of the vibration isolator, is simple in structure, is easy to form and install, can achieve adaptive installation between the track plates with different included angles and a foundation, is high in installation adaptability, and is suitable for large-scale popularization and application. And under the condition that the foundation is uneven or inclined, effective supporting and vibration isolation are achieved on the track plate, and practicability is high. The invention further provides a track slab floating track bed.

Description

Technical Field

[0001] The present invention relates to an adaptive rubber spring vibration isolator and a floating slab track bed, belonging to the technical field of track vibration reduction and noise reduction. Background Art

[0002] At present, among many track vibration reduction measures, the floating slab track bed vibration isolation is considered to be the track vibration reduction form with the best vibration reduction effect. The track bed vibration isolation separates the integral track bed from the foundation structure through the floating slab. Its main principle is to place the vibration isolator between the floating slab track bed and the foundation structure. The vibration isolators mainly include rubber vibration isolators or steel spring vibration isolators. Because the floating slab track bed has inertial mass, part of the dynamic load generated during vehicle operation can be offset by the floating slab track bed. The un-offset dynamic load and static load will be transmitted to the foundation components through the vibration isolator, so as to achieve the effect of vibration reduction.

[0003] Due to the characteristics of not rusting, variable external shape structure, large internal friction, being conducive to crossing the resonance region, and better attenuating high-frequency vibration and noise, the rubber vibration isolator has a better vibration reduction effect than the steel spring vibration isolator and is widely used. In the existing rubber vibration isolator, the unevenness or inclination of the foundation will cause the parallelism error between the floating track slab and the foundation, resulting in an included angle between the floating track slab and the foundation. The rubber spring vibration isolator cannot adapt to the included angle between the track slab and the foundation, easily causing partial suspension of the vibration isolator. After bearing the load, the floating track slab will tilt, reducing the vibration isolation effect and support reliability. CN211848657U discloses a vibration isolator, a floating slab track bed vibration isolator with automatic centering, which can achieve automatic centering according to the installation position of the floating slab track bed, so that the load borne by the vibration isolator is always perpendicular to the bearing plate, and can achieve a good vibration isolation effect. Although the above scheme realizes the automatic centering of the vibration isolator, the spherical mating area between the ball head bolt and the bearing plate is small, the installation adaptability is limited, the structure is complex, and the threaded connection bearing structure between the anchor sleeve and the ball head bolt is unreliable, and the practicability is not high. Summary of the Invention

[0004] The adaptive rubber spring vibration isolator and the floating slab track bed provided by the present invention can adapt to the included angle between the track slab and the foundation by the rotation of the cover plate on the rubber spring when there is an included angle between the track slab and the foundation, can form a horizontal support for the track slab according to the ground conditions, has high load-bearing reliability, improves the support reliability of the vibration isolator for the track slab and the vibration isolation effectiveness of the vibration isolator, and has a simple structure, is easy to form and install, can realize the adaptive installation between the track slab and the foundation with different included angles, has high installation adaptability of the vibration isolator, can effectively support and isolate vibration for the track slab under the condition of uneven or inclined foundation, and has high practicability.

[0005] To achieve the above object, the technical solution adopted by the present invention is: The adaptive rubber spring vibration isolator is clamped between the outer sleeve of the track slab and the foundation, and includes a cover plate and a rubber spring clamped between two cover plates. It is characterized in that at least one cover plate is in spherical fit with the rubber spring, so that the cover plate can rotate relative to the rubber spring to adapt to the included angle between the track slab and the foundation.

[0006] Preferably, the cover plate is divided into an upper cover plate extending into the outer sleeve and abutting against the intermediate plate in the outer sleeve and a lower cover plate contacting the foundation and located below the upper cover plate. The rubber spring includes an upper end plate contacting the upper cover plate, a lower end plate contacting the lower cover plate, and a rubber layer vulcanized and connected between the upper end plate and the lower end plate. The upper end plate is in spherical fit with the upper cover plate and / or the lower end plate is in spherical fit with the lower cover plate.

[0007] Preferably, both the upper end plate and the lower end plate are spherical panels, the top surface and the bottom surface of the rubber layer are both spherical surfaces, and are respectively formed into spherical vulcanized connections with the upper end plate and the lower end plate. An upper contact spherical surface cooperating with the upper end plate is provided on the upper cover plate, and a lower contact spherical surface cooperating with the lower end plate is provided on the lower cover plate.

[0008] Preferably, the bottom surface of the upper cover plate has an upwardly concave upper concave cavity, the upper contact spherical surface is opened at the center of the top surface of the upper concave cavity, and the upper end plate extends into the upper concave cavity to cooperate with the upper contact spherical surface.

[0009] Preferably, the top surface of the lower cover plate has a downwardly concave lower concave cavity opposite to the upper concave cavity, the lower contact spherical surface is opened at the center of the bottom surface of the lower concave cavity, and the lower end plate extends into the lower concave cavity to cooperate with the lower contact spherical surface.

[0010] Preferably, the cross-sectional area of the upper concave cavity is larger than the cross-sectional area of the lower cover plate, and the lower cover plate can extend into the upper concave cavity with the compression of the rubber layer.

[0011] Preferably, at least one layer of splint is provided in the rubber layer, and the splint is spaced apart from both the upper end plate and the lower end plate and does not contact them.

[0012] The floating slab track bed of the track slab includes a track slab, an outer sleeve cast in the track slab, and a spring vibration isolator clamped between the outer sleeve and the foundation. It is characterized in that the spring vibration isolator is the above-mentioned adaptive rubber spring vibration isolator.

[0013] Preferably, a height-adjusting gasket is provided between the upper cover plate and the intermediate plate.

[0014] The beneficial effects of the invention are: In the adaptive rubber spring vibration isolator of the present invention, at least one cover plate and the rubber spring are in spherical fit. When there is an angle between the track slab and the foundation, the cover plate rotates on the rubber spring to adapt to the angle between the track slab and the foundation, avoiding partial suspension of the vibration isolator caused by the parallelism error between the track slab and the foundation, enabling the vibration isolator to be in vertical surface contact fit with both the outer sleeve in the track slab and the foundation, being able to adapt to the ground conditions to form a horizontal support for the track slab, having high load-bearing reliability, improving the support reliability of the vibration isolator for the track slab and the vibration isolation effectiveness of the vibration isolator, with a simple structure, being easy to form and install, being able to achieve adaptive installation between track slabs with different angles and the foundation, having high installation adaptability of the vibration isolator, effectively supporting and isolating the track slab in the case of uneven or inclined foundation, and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an installation schematic diagram of the adaptive rubber spring vibration isolator of the present invention.

[0016] Figure 2 It is an installation schematic diagram of the adaptive rubber spring vibration isolator when only the upper cover plate and the upper end plate are in spherical fit.

[0017] Figure 3 It is an installation schematic diagram of the adaptive rubber spring vibration isolator when only the lower cover plate and the lower end plate are in spherical fit.

[0018] Figure 4 It is a schematic diagram of the adaptive rubber spring vibration isolator.

[0019] Figure 5 It is a schematic diagram of the floating slab track bed of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will Figures 1 - 5 make a detailed description of the embodiments of the present invention.

[0021] The adaptive rubber spring vibration isolator is clamped between the outer sleeve 2 of the track slab 1 and the foundation 3, and includes a cover plate 4 and a rubber spring 5 clamped between two cover plates 4. It is characterized in that: at least one cover plate 4 and the rubber spring 2 are in spherical fit, enabling the cover plate 4 to rotate relative to the rubber spring 5 to adapt to the angle between the track slab 1 and the foundation 3.

[0022] In the above-mentioned adaptive rubber spring vibration isolator, at least one cover plate 4 and the rubber spring 5 are in spherical surface fit. When there is an angle between the track slab 1 and the foundation 3, the cover plate 4 rotates on the rubber spring 5 to adapt to the angle between the track slab 1 and the foundation 3, avoiding the partial suspension of the vibration isolator caused by the parallelism error between the track slab 1 and the foundation 3, so that the vibration isolator and the outer sleeve 2 in the track slab and the foundation are in vertical surface contact fit, which can adapt to the ground conditions to form a horizontal support for the track slab, with high load-bearing reliability, improving the support reliability of the vibration isolator for the track slab and the vibration isolation effectiveness of the vibration isolator, and having a simple structure, being easy to form and install, being able to realize the adaptive installation between the track slab 1 with different angles and the foundation 2, having high installation adaptability of the vibration isolator, effectively supporting and isolating the track slab in the case of uneven or inclined foundation, and having high practicability.

[0023] Among them, the cover plate 4 is divided into an upper cover plate 41 extending into the outer sleeve 2 and abutting against the intermediate plate 21 in the outer sleeve 2 and a lower cover plate 42 contacting the foundation 3 and located below the upper cover plate 41. The rubber spring 5 includes an upper end plate 51 contacting the upper cover plate 41, a lower end plate 52 contacting the lower cover plate 42, and a rubber layer 53 vulcanized and connected between the upper end plate 51 and the lower end plate 52. The upper end plate 51 and the upper cover plate 41 are in spherical surface fit and / or the lower end plate 52 and the lower cover plate 42 are in spherical surface fit. The rubber spring 5 is clamped between the upper cover plate 41 and the upper cover plate 42. The upper cover plate 41 abuts against the intermediate plate 21 in the outer sleeve 2, and the upper cover plate 42 contacts the foundation. As Figure 1 shown, in the vibration isolator, a structure in which the upper cover plate 41 and the lower cover plate 42 are respectively in spherical surface fit with the upper end plate 51 and the lower end plate 52 can be adopted, and both the upper and lower cover plates can rotate relative to the spherical rubber spring 5 to adapt to the angle between the track slab 1 and the foundation 3; as Figure 2 and Figure 3 shown, it is also possible to adopt a structure in which the upper cover plate 41 or the lower cover plate 42 forms a spherical surface fit with the rubber spring 5, and the upper cover plate 41 and the upper end plate 51 in spherical surface fit can rotate relative to the spherical rubber spring 5 or the lower cover plate 42 and the lower end plate 52 in spherical surface fit can rotate relative to the spherical rubber spring 5 to adapt to the angle between the track slab 1 and the foundation 3.

[0024] Among them, both the upper end plate 51 and the lower end plate 52 are spherical panels, and the top and bottom surfaces of the rubber layer 53 are both spherical surfaces, forming spherical vulcanized connections with the upper end plate 51 and the lower end plate 52 respectively. An upper contact spherical surface 43 for cooperating with the upper end plate 51 is provided on the upper cover plate 41, and a lower contact spherical surface 44 for cooperating with the lower end plate 52 is provided on the lower cover plate 42. As Figure 4As shown, the upper cover plate 41 forms a spherical surface fit with the upper end plate 51 through the upper contact spherical surface 43, and the upper cover plate 42 forms a spherical surface fit with the lower end plate 52 through the lower contact spherical surface 44. The upper and lower cover plates respectively form a spherical surface fit with the rubber spring 5 and can rotate a certain angle relative to the rubber spring 5. In the rubber spring 5, the upper cover plate 51 and the lower end plate 52 respectively form a spherical vulcanized connection with the top surface and the bottom surface of the rubber layer 53, ensuring the initial stiffness of the rubber spring 5 and improving the support reliability.

[0025] Among them, the bottom surface of the upper cover plate 41 has an upwardly concave upper concave cavity 411, and the upper contact spherical surface 43 is opened at the center of the top surface of the upper concave cavity 411. The upper end plate 51 extends into the upper concave cavity 422 to cooperate with the upper contact spherical surface 43. The upper concave cavity 411 provides a flow space for the compression deformation of the rubber layer 53, so that the rubber spring 5 gradually provides stiffness as the load on the track slab 1 increases.

[0026] Among them, the top surface of the lower cover plate 42 has a downwardly concave lower concave cavity 421 opposite to the upper concave cavity 411, and the lower contact spherical surface 44 is opened at the center of the bottom surface of the lower concave cavity 421. The lower end plate 52 extends into the lower concave cavity 421 to cooperate with the lower contact spherical surface 44. The lower concave cavity 421 provides a flow space for the compression deformation of the rubber layer 53, so that the rubber spring 5 gradually provides stiffness as the load increases.

[0027] Among them, the cross-sectional area of the upper concave cavity 411 is larger than the cross-sectional area of the lower cover plate 42, and the lower cover plate 42 can extend into the upper concave cavity 411 as the rubber layer 53 is compressed. When the track slab bears the load, the rubber layer 53 is compressed downward, the upper cover plate 41 moves downward, and the lower cover plate 42 will extend into the upper concave cavity 411 as the rubber layer 53 is compressed. When the top surface of the lower cover plate 42 abuts against the top surface of the upper concave cavity 411, the upper cover plate 41 and the upper cover plate 42 form a rigid contact, and the relative vertical movement of the upper and lower cover plates is restricted. The vibration isolator forms a rigid support for the track slab 1, forming the vertical limit of the track slab 1. During the compression process of the rubber layer 53, the horizontal relative movement of the upper and lower cover plates is restricted by the contact between the lower cover plate 42 and the side wall of the upper concave cavity 411, forming the horizontal limit of the track slab 1, thereby forming an overload protection for the vibration isolator. The upper concave cavity 411 not only serves as a deformation outflow space during the compression of the rubber layer 53, but also can form a rigid contact with the lower cover plate 42 to limit the movement of the track slab 1, ensuring the support reliability and effectiveness.

[0028] Among them, there is at least one layer of splint 54 in the rubber layer 53, and the splint 54 is separated from and does not contact both the upper end plate 51 and the lower end plate 52. The splint 54 is used to increase the stiffness of the rubber layer 53, and the thickness and number of layers of the splint 54 can be designed according to the load-bearing requirements of the vibration isolator.

[0029] The present invention also protects a floating slab track bed, which comprises a track slab 1, an outer sleeve 2 cast in the track slab 1, and a spring vibration isolator clamped between the outer sleeve 2 and a foundation 3. It is characterized in that the spring vibration isolator is the adaptive rubber spring vibration isolator described above.

[0030] The above-mentioned floating slab track bed avoids the partial suspension of the vibration isolator caused by the parallelism error between the track slab 1 and the foundation 3, so that the vibration isolator is in surface contact and cooperation perpendicular to both the outer sleeve 2 in the track slab and the foundation 3, adapts to the ground conditions to form a horizontal support for the track slab 1, improves the support reliability of the vibration isolator for the track slab 1 and the vibration isolation effectiveness of the vibration isolator, effectively supports and isolates the track slab in the case of uneven or inclined foundation, and improves the stability of the floating slab track bed.

[0031] Wherein, a height-adjusting gasket 6 is padded between the upper cover plate 41 and the intermediate plate 21. The height-adjusting gasket 6 is used to adjust the installation height of the adaptive rubber spring vibration isolator to adapt to the different height differences between the track slab 1 and the foundation 3 and ensure the installation reliability of the vibration isolator.

[0032] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part 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 scope of protection of the present invention.

Claims

1. The adaptive rubber spring vibration isolator is clamped between the outer sleeve of the track slab and the foundation, and includes a cover plate and a rubber spring clamped between two cover plates, and is characterized in that: At least one cover plate is in spherical fit with the rubber spring, enabling the cover plate to rotate relative to the rubber spring to adapt to the angle between the track slab and the foundation.

2. The adaptive rubber spring vibration isolator according to claim 1, wherein: The cover plate mentioned above is divided into an upper cover plate that extends into the outer sleeve and abuts against the intermediate plate in the outer sleeve, and a lower cover plate that contacts the foundation and is located below the upper cover plate. The rubber spring includes an upper end plate that contacts the upper cover plate, a lower end plate that contacts the lower cover plate, and a rubber layer vulcanized to connect the upper end plate and the lower end plate. The upper end plate is in spherical fit with the upper cover plate and / or the lower end plate is in spherical fit with the lower cover plate.

3. The adaptable rubber spring vibration isolator according to claim 2, characterized in that: Both the upper end plate and the lower end plate are spherical panels. The top and bottom surfaces of the rubber layer are both spherical surfaces, forming spherical vulcanized connections with the upper end plate and the lower end plate respectively. An upper contact spherical surface that cooperates with the upper end plate is provided on the upper cover plate, and a lower contact spherical surface that cooperates with the lower end plate is provided on the lower cover plate.

4. The adaptable rubber spring vibration isolator according to claim 3, wherein: The bottom surface of the upper cover plate has an upwardly recessed upper cavity, and the upper contact spherical surface is opened at the center of the top surface of the upper cavity. The upper end plate extends into the upper cavity to cooperate with the upper contact spherical surface.

5. The adaptive rubber spring vibration isolator according to claim 4, characterized in that: The top surface of the lower cover plate has a downwardly recessed lower cavity that is opposite to the upper cavity, and the lower contact spherical surface is opened at the center of the bottom surface of the lower cavity. The lower end plate extends into the lower cavity to cooperate with the lower contact spherical surface.

6. The adaptive rubber spring vibration isolator according to claim 5, characterized in that: The cross-sectional area of the upper cavity is larger than the cross-sectional area of the lower cover plate, and the lower cover plate can extend into the upper cavity as the rubber layer is compressed.

7. The adaptive rubber spring vibration isolator according to claim 2, wherein: There is at least one layer of splint in the rubber layer, and the splint is separated from both the upper end plate and the lower end plate and does not contact them.

8. Floating track bed for track slab, comprising a track slab, an outer sleeve cast in the track slab, and a spring vibration isolator clamped between the outer sleeve and the foundation, characterized in that: The spring vibration isolator is the adaptable rubber spring vibration isolator according to any one of claims 1 to 7.

9. The floating track bed of the track slab according to claim 1, characterized in that: A height-adjusting gasket is padded between the upper cover plate and the intermediate plate.

Images