Noise-reducing, durable, and easy-to-maintain bridge expansion joints

Abstract

This invention relates to the field of bridge expansion joint technology, and proposes a noise-reducing, durable, and easy-to-maintain bridge expansion joint. It includes a first support mounted on a first bridge body, a first comb plate mounted on the first support, and a first toothed plate mounted on the first support, located below the first comb plate. The first toothed plate has a convex arc portion and a concave arc portion, with the concave arc portion located on one side of the convex arc portion. A sliding seat is slidably mounted on the first support, and a second comb plate is slidably and vertically mounted on the sliding seat. The second comb plate is staggered with the first comb plate, and the second comb plate has an abutment portion. After the first bridge body moves the first toothed plate, the abutment portion abuts against the convex arc portion and the concave arc portion successively, causing one end of the second comb plate to rise and then fall. This technical solution solves the problems of existing steel plate expansion joints where debris and stones are difficult to clean from the comb teeth, and where the expansion joint is damaged by the pressure of stones in hot weather, potentially collapsing when vehicles pass over it, leading to vehicle damage and personal injury.

Description

Technical Field

[0001] This invention relates to the field of bridge expansion joint technology, specifically to a noise-reducing, durable, and easy-to-maintain bridge expansion joint. Background Technology

[0002] Bridge expansion joints are commonly used structural components in bridge engineering to mitigate stress deformation caused by temperature changes, contraction, and expansion, thereby protecting the overall structure and safety of the bridge. Their main function is to allow for a certain degree of relative displacement between bridge decks under vehicle and wind loads to adapt to various natural factors while maintaining the integrity of the bridge structure. Steel plate expansion joints are a common type, employing a comb-like structure to maintain road surface stability during expansion and contraction. However, debris and stones within the comb-like structure are difficult to clean, and in hot weather, the pressure from these stones can damage the expansion joint. This could lead to collapse when vehicles pass over it, posing a risk of vehicle damage and personal injury. Summary of the Invention

[0003] This invention proposes a noise-reducing, durable, and easy-to-maintain bridge expansion joint, which solves the problems of the steel plate expansion joint in related technologies, such as the difficulty in cleaning debris and stones from the comb teeth, the damage to the expansion joint caused by the compression of stones in hot weather, and the risk of collapse when vehicles pass by, leading to vehicle damage and personal injury.

[0004] The technical solution of the present invention is as follows: Noise-reducing, durable, and easy-to-maintain bridge expansion joints, used for installation between the first and second bridge sections, include: The first support is mounted on the first bridge body. The first comb plate is mounted on the first support. A first toothed plate is disposed on the first support, located below the first comb plate. The first toothed plate has a convex arc portion and a concave arc portion, with the concave arc portion located on one side of the convex arc portion. A slide block, which is slidably mounted on the first support in a horizontal direction. The second comb plate is slidably mounted on the slide block and is staggered with the first comb plate. One end of the second comb plate rotates and slides relative to the first comb plate, and the other end rotates and slides relative to the slide block. The second comb plate has an abutting part. After the first bridge body drives the first toothed plate to move, the abutting part abuts against the convex arc part and the concave arc part in succession, thereby driving one end of the second comb plate to rise and then fall.

[0005] As a further technical solution, the first comb plate has a plurality of first comb teeth arranged in sequence, and the first comb plate also has a guide groove located on the side of the first comb teeth; the second comb plate has a plurality of second comb teeth arranged alternately with the first comb teeth, and the second comb plate also has a spherical protrusion that rotates and slides within the guide groove.

[0006] As a further technical solution, a water-blocking strip is also included, with one end of the water-blocking strip disposed on the first comb plate and the other end disposed on the second comb plate.

[0007] As a further technical solution, the convex arc portion and the concave arc portion are arranged adjacent to each other, and the convex arc portion and the concave arc portion are connected and formed into an S-shape.

[0008] As a further technical solution, the guide groove has a straight section and a lifting section, the straight section and the lifting section are connected, and the straight section and the lifting section are arranged at an angle.

[0009] As a further technical solution, the first comb plate also has a guide surface located between two adjacent first comb teeth, and the second comb plate also has a shovel portion located at the head of the second comb tooth, the shovel portion being slidably disposed relative to the guide surface.

[0010] As a further technical solution, the first comb plate and the second comb plate together form a first telescopic comb tooth assembly, which also includes: The second support is mounted on the second bridge body. The second telescopic comb tooth assembly has the same structure as the first telescopic comb tooth assembly, and the second telescopic comb tooth assembly and the first telescopic comb tooth assembly are symmetrically arranged on the second support. The second toothed plate is disposed on the second support and located below the second telescopic comb assembly. The second toothed plate has the same structure as the first toothed plate and is staggered.

[0011] As a further technical solution, the abutting portions of the first telescopic comb assembly and the second telescopic comb assembly are arranged alternately.

[0012] As a further technical solution, the slide has two adjacent vertical strip grooves, and both the first telescopic comb assembly and the second telescopic comb assembly have sliding parts, which are slidably disposed in the strip grooves.

[0013] As a further technical solution, an elastic element is also included, one end of which acts on the bottom of the strip groove and the other end of which acts on the sliding part, for providing an upward force on the second comb plate.

[0014] The working principle and beneficial effects of this invention are as follows: This invention features a first support fixed at a predetermined position on the first bridge body, serving as the foundation of the supporting structure. A first comb plate is mounted on the first support, its function being to cooperate with a second comb plate to form an interlaced comb-like structure, reducing deformation resistance and noise during bridge expansion and contraction. The first toothed plate is located below the first comb plate and directly fixed to the first support, featuring convex and concave arc portions arranged adjacent to each other, facilitating subsequent interaction with the second comb plate. A sliding block, acting as a horizontal sliding device, is mounted on the first support, preventing the second comb plate from moving horizontally due to bridge expansion and contraction. The second comb plate is the core component of this expansion joint; one end is connected to the first comb plate via a rotating sliding mechanism, and the other end is connected to the sliding block using the same rotating sliding method. The second comb plate and the first comb plate are arranged in an interlaced manner to accommodate the longitudinal expansion and contraction requirements of the bridge. In actual use, after the first and second bridge bodies approach each other, the convex and concave arc parts sequentially drive the second comb plate to slide up and down. When one end of the second comb plate rises, the other end slides on the first comb plate. At this time, the angle between the second and first comb plates starts to decrease from °. As the bridge bodies continue to approach each other, the rising end of the second comb plate descends, and the distance between the first and second comb plates also decreases further. The angle between the second and second comb plates also increases. The specific working effect is similar to the action of shoveling with a shovel, which can effectively clear stones and other debris stuck between the first and second comb plates. After the angle between the first and second comb plates gradually changes, the second comb plate, which rises to a certain extent, can also provide more gripping force for passing vehicles, which to a certain extent solves the problem that steel plate expansion joints in the existing technology are prone to causing vehicles to slip. Attached Figure Description

[0015] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the first comb plate structure in this invention; Figure 4 This is a schematic diagram of the second comb plate structure in this invention; In the diagram: First support-1, First comb plate-2, First comb tooth-201, Guide groove-202, Straight section-203, Lifting section-204, Guide surface-205, First telescopic comb tooth assembly-206, Second telescopic comb tooth assembly-207, Sliding part-208, First tooth plate-3, Convex arc part-301, Concave arc part-302, Slide seat-4, Strip groove-401, Second comb plate-5, Abutting part-501, Second comb tooth-502, Shovel part-503, Ball protrusion-504, Water-blocking strip-6, Second support-7, Second tooth plate-8, Elastic element-9. Detailed Implementation

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Reference Figures 1-4This invention proposes a noise-reducing, durable, and easy-to-maintain bridge expansion joint for installation between a first bridge body and a second bridge body. It includes a first support 1 mounted on the first bridge body, a first comb plate 2 mounted on the first support 1, and a first toothed plate 3 mounted on the first support 1, located below the first comb plate 2. The first toothed plate 3 has a convex arc portion 301 and a concave arc portion 302, with the concave arc portion 302 located on one side of the convex arc portion 301. A slide block 4 is horizontally slidably mounted on the first support 1, and a second comb plate 5 is vertically slidably mounted on the slide block 4. The second comb plate 5 is staggered with the first comb plate 2. One end of the second comb plate 5 rotates and slides relative to the first comb plate 2, and the other end rotates and slides relative to the slide block 4. The second comb plate 5 has an abutment portion 501. After the first bridge body moves the first toothed plate 3, the abutment portion 501 abuts against the convex arc portion 301 and the concave arc portion 302, causing one end of the second comb plate 5 to rise and then fall.

[0022] In this embodiment, considering that debris and stones in the comb teeth of steel plate expansion joints in related technologies are difficult to clean, and that the expansion joint may be damaged due to the compression of stones in hot weather, potentially leading to vehicle damage or even personal injury when vehicles pass over it, this solution is designed with a first support 1 installed and fixed at a predetermined position on the first bridge body as the foundation of the supporting structure. A first comb plate 2 is installed on the first support 1, and its function is to cooperate with the second comb plate 5 to form an interlaced comb-like structure, thereby reducing deformation resistance and noise during bridge expansion and contraction. A first tooth plate 3 is located below the first comb plate 2 and directly fixed to the first support 1. It is designed with a convex arc portion 301 and a concave arc portion 302, arranged adjacent to each other, providing conditions for subsequent interaction with the second comb plate 5. The sliding block 4, as a horizontal sliding device, is installed on the first support 1 to prevent the second comb plate 5 from moving horizontally due to the stretching and contraction of the bridge. The second comb plate 5 is the core component of this expansion joint. One end of it is connected to the first comb plate 2 through a rotating sliding mechanism, and the other end is connected to the sliding block 4 in the same rotating sliding manner. The second comb plate 5 and the first comb plate 2 are arranged in an alternating manner to accommodate the longitudinal expansion and contraction of the bridge. In actual use, after the first and second bridge bodies approach each other, the convex arc 301 and concave arc 302 sequentially drive the second comb plate 5 to slide up and down. When one end of the second comb plate 5 rises, the other end slides on the first comb plate 2. At this time, the angle between the second comb plate 5 and the first comb plate 2 starts to decrease from 180°. As the bridge bodies continue to approach each other, the rising end of the second comb plate 5 descends, and at the same time, the distance between the first comb plate 2 and the second comb plate 5 also gets closer. The angle between the second comb plate 5 and the second comb plate 5 also increases. The specific working effect is similar to the action of shoveling with a shovel, which can effectively clear stones and other debris stuck between the first comb plate 2 and the second comb plate 5. After the angle between the first comb plate 2 and the second comb plate 5 gradually changes, the second comb plate 5, which rises to a certain extent, can also provide more gripping force for passing vehicles. To a certain extent, it also solves the problem that steel plate expansion joints in the prior art are prone to causing vehicles to slip.

[0023] Furthermore, the first comb plate 2 has a plurality of first comb teeth 201 arranged sequentially, and the first comb plate 2 also has a guide groove 202 located on the side of the first comb teeth 201; the second comb plate 5 has a plurality of second comb teeth 502 arranged alternately with the first comb teeth 201, and the second comb plate 5 also has a spherical protrusion 504 that rotates and slides within the guide groove 202.

[0024] In this embodiment, the first comb plate 2 is provided with a plurality of first comb teeth 201 arranged sequentially. These comb teeth are designed to interlock with the comb teeth of the second comb plate 5 to disperse the stress during bridge expansion and contraction, while reducing noise. In addition, the first comb plate 2 is also provided with a guide groove 202, which is located on the side of the first comb teeth 201 and is used to guide specific components of the second comb plate 5 to slide and rotate precisely. The second comb plate 5 is also provided with a plurality of second comb teeth 502, which are arranged alternately with the first comb teeth 201 on the first comb plate 2 to ensure effective engagement and disengagement during expansion and contraction, thereby achieving reasonable stress distribution and transfer. In addition, the second comb plate 5 is specially designed with a spherical protrusion 504, which is embedded in and can rotate and slide freely within the guide groove 202 of the first comb plate 2. This ensures the flexibility of the expansion joint during operation and reduces wear and noise. With this structural design, when the bridge expands or contracts due to external factors, the comb teeth on the first comb plate 2 and the second comb plate 5 can open and close in a timely manner, while the spherical protrusion 504 can rotate and slide flexibly in the guide groove 202, ensuring the smooth movement of the expansion joint as a whole, thereby achieving the functional goals of noise reduction, durability and easy maintenance.

[0025] Furthermore, it also includes a water-blocking strip 6, one end of which is disposed on the first comb plate 2 and the other end of which is disposed on the second comb plate 5.

[0026] In this embodiment, a water-retaining strip 6 is added to enhance the waterproof performance and durability of the expansion joint. In the actual construction, one end of the water-retaining strip 6 is tightly fixed to the first comb plate 2, and its specific position can be reasonably arranged according to the actual needs of the bridge expansion joint. The other end of the water-retaining strip 6 is also firmly installed on the second comb plate 5, ensuring that the water-retaining strip 6 can always maintain a sealed state along with the relative movement of the first comb plate 2 and the second comb plate 5 during the expansion and contraction of the bridge. When the bridge expands or contracts due to factors such as temperature difference and load changes, the first comb plate 2 and the second comb plate 5 will alternately rise and fall and slide horizontally according to the design. During this process, the water-retaining strip 6 acts as a continuous barrier, which can effectively prevent moisture, dust and other foreign substances from seeping into the bridge body from the expansion joint, thereby extending the service life of the bridge, reducing structural damage caused by water erosion, reducing noise, and improving the overall performance and maintenance convenience of the bridge expansion joint.

[0027] Furthermore, the convex arc portion 301 and the concave arc portion 302 are arranged adjacent to each other, and the convex arc portion 301 and the concave arc portion 302 are connected and formed into an S-shape.

[0028] In this embodiment, the convex arc portion 301 and the concave arc portion 302 are adjacent and integrally formed, closely connected to create a continuous curve structure resembling an "S" shape. When the bridge expands or contracts due to thermal expansion and contraction or load changes, the abutment portion 501 on the second comb plate 5 will move interactively along this "S"-shaped trajectory. In specific operation, as the first bridge body moves, the abutment portion 501 first contacts the convex arc portion 301 on the first toothed plate 3 and rises with it, then transitions to the concave arc portion 302. This shape allows the abutment portion 501 to smoothly transition between the convex arc portion 301 and the concave arc portion 302. During this process, the abutment portion 501 will naturally slide down along the S-shaped trajectory. This process can smoothly guide the second comb plate 5 to complete the lifting and lowering action, thereby effectively relieving the stress generated during expansion and contraction, reducing noise, and reducing wear, ensuring that the expansion joint can serve the expansion and contraction needs of the bridge structure for a long time and effectively. At the same time, the "S"-shaped design of the convex arc portion 301 and the concave arc portion 302 structure is easy to clean and maintain, which helps to improve the convenience of maintenance of the expansion joint.

[0029] Furthermore, the guide groove 202 has a straight section 203 and a lifting section 204, which are connected and are arranged at an angle.

[0030] In this embodiment, the guide groove 202 is configured as a straight section 203 and a lifting section 204. When the ball protrusion 504 rotates and slides in the straight section 203, the first comb plate 2 and the second comb plate 5 interweave and approach each other. When the ball protrusion 504 enters the lifting section 204, the angle between the first comb plate 2 and the second comb plate 5 gradually increases to 180°. After entering the lifting section 204, the second comb plate 5 changes from an upward state to a synchronous upward movement with the upward movement of the plate surface, which can more fully push out and clean the soil and debris stuck between the first comb plate 2 and the second comb plate 5.

[0031] Furthermore, the first comb plate 2 also has a guide surface 205, which is located between two adjacent first comb teeth 201. The second comb plate 5 also has a shovel portion 503, which is located at the head of the second comb tooth 502 and is slidably disposed relative to the guide surface 205.

[0032] In this embodiment, in addition to the original first comb teeth 201, a guide surface 205 is provided between two adjacent first comb teeth 201 in the structure of the first comb plate 2. This design provides precise guiding support for the sliding shovel action of the second comb plate 5, ensuring that the relative sliding between the first comb plate 2 and the second comb plate 5 is smoother and more stable during bridge expansion and contraction. Correspondingly, a shovel part 503 structure is added to the head of each second comb tooth 502 of the second comb plate 5. This shovel part 503 is designed to match the guide surface 205 on the first comb plate 2. When the bridge expands and contracts, the shovel part 503 of the second comb plate 5 slides under the guidance of the guide surface 205, thereby ensuring good meshing and separation between the second comb tooth 502 and the first comb tooth 201, effectively dispersing stress, reducing friction and noise, and enhancing the durability of the expansion joint. Meanwhile, a V-shaped structure is also formed between the shovel part 503 and the guide surface 205, which can largely prevent the damage caused by soil and stones in the gap during the merging process of the first comb tooth 201 and the second comb tooth 502. Through this design of the guide surface 205 and the shovel part 503, the entire bridge expansion joint can achieve more stable and efficient expansion and contraction during operation, further improving the overall performance and service life of the expansion joint.

[0033] Furthermore, the first comb plate 2 and the second comb plate 5 together form the first telescopic comb tooth assembly 206, which also includes a second support 7. The second support 7 is disposed on the second bridge body. The second telescopic comb tooth assembly 207 and the first telescopic comb tooth assembly 206 have the same structure and are symmetrically disposed on the second support 7. The second tooth plate 8 is disposed on the second support 7 and is located below the second telescopic comb tooth assembly 207. The second tooth plate 8 has the same structure as the first tooth plate 3 and is staggered.

[0034] In this embodiment, in addition to the first telescopic comb tooth assembly 206 already described and installed on the first bridge body, a second support 7 is also provided, which is fixedly installed on the second bridge body. Correspondingly, another second telescopic comb tooth assembly 207 with the same structure is constructed, symmetrically arranged on the second support 7 with the first telescopic comb tooth assembly 206. Specifically, the second telescopic comb tooth assembly 207 includes a structure similar to the first comb plate 2 and the second comb plate 5, which together constitute the second telescopic comb tooth assembly 207 and cooperate with the first telescopic comb tooth assembly 206 during bridge expansion and contraction to ensure that the bridge structure can smoothly and effectively cope with expansion and contraction changes. Furthermore, a second tooth plate 8 is also provided on the second support 7. The structure of the second tooth plate 8 is the same as that of the first tooth plate 3, and it is arranged alternately below the first tooth plate 3. Thus, when the bridge expands or contracts, the second tooth plate 8 interacts with the corresponding components in the second telescopic comb tooth assembly 207, working together on the second bridge body to achieve a similar expansion and contraction function to the first bridge body. This allows for more precise control of the expansion joints on both sides of the bridge during expansion and contraction. Through this symmetrically configured double-sided expansion comb assembly and tooth plate structure, the entire bridge expansion joint can distribute stress more evenly, effectively reduce noise, and enhance the load-bearing capacity and service life of the bridge expansion joint, thereby improving the stability and reliability of the overall structure.

[0035] Furthermore, the abutting portion 501 of the first telescopic comb assembly 206 and the abutting portion 501 of the second telescopic comb assembly 207 are arranged alternately.

[0036] In this embodiment, the second comb plate 5 of the first telescopic comb assembly 206 is designed with an abutment portion 501. Similarly, the second telescopic comb assembly 207 is also equipped with a corresponding abutment portion 501. When the two telescopic comb assemblies move relative to each other during the expansion and contraction of the bridge, the two abutment portions 501 will be staggered rather than side by side. The cleaning movement of the first telescopic comb assembly 206 and the second telescopic comb assembly 207 is controlled independently by the tooth plate on one side. It can be precisely and individually controlled and adjusted according to the different expansion and contraction states of the first and second bridge bodies, making the stability of the entire expansion joint and the cleaning efficiency of debris higher.

[0037] Furthermore, the slide 4 has two adjacent vertical strip grooves 401, and the first telescopic comb assembly 206 and the second telescopic comb assembly 207 both have sliding parts 208, which are slidably disposed in the strip grooves 401.

[0038] In this embodiment, a strip groove 401 is provided on the slide block 4 to provide guidance for the lifting and sliding of the second comb plate 5 and the fourth comb plate, making the operation of the expansion joint more stable.

[0039] Furthermore, it also includes an elastic element 9, one end of which acts on the bottom of the strip groove 401 and the other end acts on the sliding part 208, for providing an upward force on the second comb plate 5.

[0040] In this embodiment, considering that the second comb plate 5 and the fourth comb plate need to bear a certain load, the contact part 501 alone is prone to slippage or damage. Therefore, this solution provides an elastic element 9 between the strip groove 401 and the sliding part 208. The elastic element 9 enables the device to receive a certain force buffer during deformation, compression and reset, which further improves the overall stability of the device.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A noise-reducing, durable, and easy-to-maintain bridge expansion joint, characterized in that: For installation between the first bridge body and the second bridge body, including: The first support (1) is mounted on the first bridge body. The first comb plate (2) is mounted on the first support (1). The first toothed plate (3) is disposed on the first support (1) and located below the first comb plate (2). The first toothed plate (3) has a convex arc portion (301) and a concave arc portion (302), wherein the concave arc portion (302) is located on one side of the convex arc portion (301). A slide (4) is slidably mounted on the first support (1) in a horizontal direction. The second comb plate (5) is slidably mounted on the slide block (4). The second comb plate (5) is staggered with the first comb plate (2). One end of the second comb plate (5) rotates and slides relative to the first comb plate (2), and the other end rotates and slides relative to the slide block (4). The second comb plate (5) has an abutting part (501). After the first bridge body drives the first toothed plate (3) to move, the abutting part (501) abuts against the convex arc part (301) and the concave arc part (302) in succession, and then drives one end of the second comb plate (5) to rise and then fall.

2. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 1, characterized in that, The first comb plate (2) has a plurality of first comb teeth (201) arranged in sequence. The first comb plate (2) also has a guide groove (202) located on the side of the first comb teeth (201). The second comb plate (5) has a plurality of second comb teeth (502) arranged alternately with the first comb teeth (201). The second comb plate (5) also has a spherical protrusion (504) which rotates and slides within the guide groove (202).

3. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 1, characterized in that, It also includes a water-blocking strip (6), one end of which is disposed on the first comb plate (2) and the other end is disposed on the second comb plate (5).

4. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 1, characterized in that, The convex arc portion (301) and the concave arc portion (302) are arranged adjacent to each other, and the convex arc portion (301) and the concave arc portion (302) are connected and formed into an S-shape.

5. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 2, characterized in that, The guide groove (202) has a straight section (203) and a lifting section (204), the straight section (203) and the lifting section (204) are connected, and the straight section (203) and the lifting section (204) are arranged at an angle.

6. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 2, characterized in that, The first comb plate (2) also has a guide surface (205) located between two adjacent first comb teeth (201), and the second comb plate (5) also has a shovel (503) located at the head of the second comb tooth (502), and the shovel (503) is slidably disposed relative to the guide surface (205).

7. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 1, characterized in that, The first comb plate (2) and the second comb plate (5) together form the first telescopic comb tooth assembly (206), which also includes: The second support (7) is installed on the second bridge body. The second telescopic comb tooth assembly (207) has the same structure as the first telescopic comb tooth assembly (206), and the second telescopic comb tooth assembly (207) and the first telescopic comb tooth assembly (206) are symmetrically arranged on the second support (7). The second toothed plate (8) is disposed on the second support (7) and located below the second telescopic comb assembly (207). The second toothed plate (8) has the same structure as the first toothed plate (3) and is staggered.

8. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 7, characterized in that, The abutting portion (501) of the first telescopic comb assembly (206) and the abutting portion (501) of the second telescopic comb assembly (207) are arranged alternately.

9. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 7, characterized in that, The slide (4) has two adjacent vertical strip grooves (401), and the first telescopic comb assembly (206) and the second telescopic comb assembly (207) both have sliding parts (208), which are slidably disposed in the strip grooves (401).

10. The noise-reducing, durable, and easy-to-maintain bridge expansion joint according to claim 9, characterized in that, It also includes an elastic element (9), one end of which acts on the bottom of the strip groove (401) and the other end acts on the sliding part (208) to provide an upward force on the second comb plate (5).

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