A damping and vibration reduction multi-directional displacement comb plate bridge expansion joint

Abstract

This utility model relates to the field of bridge technology and discloses a damping and vibration-damping multi-directional displacement comb-plate bridge expansion joint, including the main bridge side and the approach bridge side. This damping and vibration-damping multi-directional displacement comb-plate bridge expansion joint is equipped with a fixed frame, a fixed box, a disc spring assembly, a wear-resistant sleeve, a sphere, threaded holes, a mounting groove, a pad, and fixing bolts. Through the cooperative design of the wear-resistant sleeve and the sphere, the sphere can rotate freely within the wear-resistant sleeve. The threaded holes on its inner wall facilitate connection with the fixing bolts. When the fixed comb plate undergoes angular displacement, the rotation of the sphere and the elastic deformation of the disc spring assembly work together to effectively disperse stress and avoid localized stress concentration in the comb plate. Compared to existing technologies that rely solely on the elastic deformation of the disc spring assembly to achieve angular displacement, this device can better adapt to the longitudinal, lateral, and vertical composite deformations generated by bridges under complex working conditions, greatly reducing the risk of component damage.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, specifically to a damping and vibration-reducing multi-directional displacement comb plate bridge expansion joint device. Background Technology

[0002] Bridge expansion joints are devices that are typically installed between two beam ends, between a beam end and an abutment, or at the junction of bridges. These devices are designed to prevent significant displacement and damage to the superstructure of a bridge under the influence of factors such as vehicle loads, temperature changes, and concrete shrinkage and creep.

[0003] Existing technology publication CN220952938U patent document provides a damping and vibration reduction multi-directional displacement comb plate bridge expansion joint device. The movable and fixed comb plates are fixed to the top of the main bridge side and the approach bridge side of the bridge respectively via mounting bolt assemblies. After installation, the upper displacement disc spring is tightly attached to the surface of the locking nut boss, and the lower displacement disc spring is tightly attached to the surface of the fixing bolt. The comb plate undergoes angular displacement, and the locking bolt transmits this displacement to the upper and lower displacement disc springs through a connector. The disc spring assembly adapts to this displacement through its own elastic deformation. Simultaneously, the rubber body at the bottom of the comb plate cooperates to achieve the overall rotational displacement function of the expansion joint device, preventing damage to the movable and fixed comb plates due to stress and extending the service life of the device.

[0004] The aforementioned existing technology, although it adapts to displacement by setting the disc spring assembly to deform, still has limitations in practical applications. This displacement mechanism mainly relies on the elastic deformation of the disc spring assembly to achieve angular displacement, which is insufficient for adapting to the longitudinal, lateral, and vertical composite deformations generated by bridges under complex working conditions. This can easily lead to local stress concentration in the comb plate and accelerate component damage. Secondly, although it relies on the rubber body and disc springs for vibration reduction, its attenuation effect on high-frequency vibrations, such as the impact generated by the sudden braking of heavy vehicles, is limited. Therefore, we need a damping vibration reduction multi-directional displacement comb plate bridge expansion joint device. Utility Model Content

[0005] The purpose of this invention is to provide a damping and vibration reduction multi-directional displacement comb plate bridge expansion joint, which solves the problem of insufficient adaptability of bridges to longitudinal, lateral, and vertical composite deformation under complex working conditions mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A damping and vibration reduction multi-directional displacement comb plate bridge expansion joint includes a main bridge side and a bridge approach side. Both the main bridge side and the bridge approach side are provided with a concrete layer, and a steel reinforcement frame is provided inside the concrete layer. A fixed comb plate is provided on the inner wall of the bridge approach side, and a movable comb plate is provided on the inner wall of the main bridge side. An installation component is provided on the inner wall of the concrete layer, and a buffer component is provided at the bottom of the fixed comb plate.

[0008] The mounting assembly includes a mounting bracket, one end of which is fixedly connected to a mounting box. A disc spring assembly is provided at the bottom inner part of the mounting box, and a wear-resistant sleeve is fixedly connected to the top inner part of the mounting box. A ball is rotatably connected to the inner wall of the wear-resistant sleeve, and a threaded hole is provided on the inner wall of the ball. An installation groove is provided at the top of the fixed comb plate, and a pad is slidably connected to the inner wall of the installation groove. A fixing bolt is provided on the outer wall of the pad.

[0009] The buffer assembly includes a stainless steel plate, and a rubber block is fixedly connected to the bottom of the stainless steel plate. The inner wall of the rubber block has a through hole, and the concrete layer has a fixing groove, and a damper is fixedly connected to the inner wall of the fixing groove.

[0010] Preferably, the inner wall shape and size of the wear-resistant sleeve match the outer wall shape and size of the sphere, and the inner wall of the wear-resistant sleeve fits snugly against the outer wall of the sphere.

[0011] Preferably, one end of the fixing bolt passes through the washer and extends into the threaded hole for connection.

[0012] Preferably, there are multiple mounting slots, and the multiple mounting slots are equally spaced on the fixed comb plate.

[0013] Preferably, the fixing frame is L-shaped.

[0014] Preferably, the inner wall shape and size of the fixing groove match the outer wall shape and size of the damper, and the inner wall of the fixing groove fits into the outer wall of the damper.

[0015] Preferably, one end of the damper passes through a through hole and is connected to a stainless steel plate.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0017] 1. This utility model includes a fixed frame, a fixed box, a disc spring assembly, a wear-resistant sleeve, a sphere, a threaded hole, a mounting groove, a pad, and a fixing bolt. Through the matching design of the wear-resistant sleeve and the sphere, the sphere can rotate freely within the wear-resistant sleeve. The threaded hole on its inner wall facilitates connection with the fixing bolt. When the fixed comb plate undergoes angular displacement, the rotation of the sphere and the elastic deformation of the disc spring assembly work together to effectively disperse stress and avoid local stress concentration on the comb plate. Compared with the prior art, which relies solely on the elastic deformation of the disc spring assembly to achieve angular displacement, this device can better adapt to the longitudinal, lateral, and vertical composite deformations generated by bridges under complex working conditions, greatly reducing the risk of component damage.

[0018] 2. This utility model is equipped with a stainless steel plate, rubber block, through hole, fixing groove and damper, forming a multi-stage damping vibration reduction system. By setting rubber block and disc spring assembly, low-frequency vibration generated during vehicle operation can be initially buffered. By setting damper, the impact energy generated by high-frequency vibration such as sudden braking of heavy vehicles can be efficiently absorbed. Through multi-stage buffering and energy dissipation, compared with the existing technology that relies solely on rubber body and disc spring for vibration reduction, this device significantly improves the attenuation effect of high-frequency vibration, reduces the damage of vibration to bridge structure, and enhances the overall stability and durability of bridge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 This utility model Figure 2 Enlarged structural diagram at point B;

[0022] Figure 4 This is a schematic diagram of the fixed comb plate and the movable comb plate of this utility model.

[0023] The components include: 1. Main bridge side; 2. Approach bridge side; 3. Concrete layer; 4. Reinforcing steel frame; 5. Fixed comb plate; 6. Movable comb plate; 7. Installation components; 701. Fixing frame; 702. Fixing box; 703. Disc spring assembly; 704. Wear-resistant sleeve; 705. Sphere; 706. Threaded hole; 707. Mounting groove; 708. Pad; 709. Fixing bolt; 8. Buffer assembly; 801. Stainless steel plate; 802. Rubber block; 803. Through hole; 804. Fixing groove; 805. Damper. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 As shown, a damping and vibration-reducing multi-directional displacement comb-plate bridge expansion joint includes a main bridge side 1 and a bridge approach side 2. Both the main bridge side 1 and the bridge approach side 2 have a concrete layer 3 inside, and a steel reinforcement frame 4 is installed inside the concrete layer 3. A fixed comb plate 5 is installed on the inner wall of the bridge approach side 2, and a movable comb plate 6 is installed on the inner wall of the main bridge side 1. An installation assembly 7 is installed on the inner wall of the concrete layer 3. A buffer assembly 8 is installed at the bottom of the fixed comb plate 5. The installation assembly 7 includes a fixing frame 701, and a fixing box 702 is fixedly connected to one end of the fixing frame 701. A disc spring assembly 703 is installed at the bottom of the fixing box 702. A wear-resistant sleeve 704 is fixedly connected to the inner top of the fixed box 702. A ball 705 is rotatably connected to the inner wall of the wear-resistant sleeve 704. A threaded hole 706 is opened on the inner wall of the ball 705. An installation groove 707 is opened on the top of the fixed comb plate 5. A pad 708 is slidably connected to the inner wall of the installation groove 707. A fixing bolt 709 is provided on the outer wall of the pad 708. The buffer assembly 8 includes a stainless steel plate 801. A rubber block 802 is fixedly connected to the bottom of the stainless steel plate 801. A through hole 803 is opened on the inner wall of the rubber block 802. A fixing groove 804 is opened in the concrete layer 3. A damper 805 is fixedly connected to the inner wall of the fixing groove 804.

[0026] Through the above technical solution, the design of the wear-resistant sleeve 704 and the sphere 705 allows the sphere 705 to rotate freely within the wear-resistant sleeve 704. The threaded hole 706 on its inner wall facilitates connection with the fixing bolt 709. When the fixed comb plate 5 undergoes angular displacement, the rotation of the sphere 705 and the elastic deformation of the disc spring assembly 703 work together to effectively disperse stress and avoid local stress concentration on the comb plate. Compared with the existing technology that relies solely on the elastic deformation of the disc spring assembly to achieve angular displacement, this device can better adapt to the longitudinal stress generated by bridges under complex working conditions. The device features lateral and vertical composite deformation, which greatly reduces the risk of component damage. By setting up rubber blocks 802 and disc springs 703, it can initially buffer low-frequency vibrations generated during vehicle operation. By setting up dampers 805, it can efficiently absorb the impact energy generated by high-frequency vibrations such as sudden braking of heavy vehicles. Through multi-stage buffering and energy dissipation, compared with the existing technology that relies solely on rubber bodies and disc springs for vibration reduction, this device significantly improves the attenuation effect of high-frequency vibrations, reduces the damage of vibration to the bridge structure, and enhances the overall stability and durability of the bridge.

[0027] Specifically, the inner wall shape and size of the wear-resistant sleeve 704 match the outer wall shape and size of the sphere 705, and the inner wall of the wear-resistant sleeve 704 fits into the outer wall of the sphere 705.

[0028] Through the above technical solution, when the ball 705 rotates, it is ensured that the ball 705 rotates stably and smoothly within the wear-resistant sleeve 704, avoiding shaking or displacement during rotation, thereby ensuring multi-directional displacement of the fixed comb plate 5.

[0029] Specifically, one end of the fixing bolt 709 passes through the washer 708 and extends into the threaded hole 706 for connection.

[0030] The above technical solution facilitates the installation of the fixed comb plate 5 by using a fixing bolt 709, one end of which extends into the threaded hole 706 of the ball 705.

[0031] Specifically, there are multiple mounting slots 707, and these multiple mounting slots 707 are equally spaced on the fixed comb plate 5.

[0032] The above technical solution facilitates the assembly of multiple pads 708 and fixing bolts 709 by opening multiple mounting slots 707.

[0033] Specifically, the fixture 701 is L-shaped.

[0034] Through the above technical solution, the L-shaped fixing frame 701 can connect with the inner wall of the concrete layer 3 with a large contact area, providing stable support and ensuring that the fixing frame 701 is installed securely.

[0035] Specifically, the inner wall shape and size of the fixing groove 804 match the outer wall shape and size of the damper 805, and the inner wall of the fixing groove 804 fits against the outer wall of the damper 805.

[0036] Through the above technical solution, the damper 805 is firmly installed in the concrete layer 3, and will not loosen or shift during operation, ensuring that the damper 805 can stably play its role in absorbing vibration energy.

[0037] Specifically, one end of the damper 805 passes through the through hole 803 and is connected to the stainless steel plate 801.

[0038] Through the above technical solution, it is ensured that the stainless steel plate 801 can effectively transmit the impact force to the damper 805, so that the damper 805 can respond in time and consume the impact energy, thereby realizing the buffering and vibration reduction function.

[0039] In use, when the bridge first undergoes displacement deformation due to environmental factors or vehicle loads, the comb plate rotates and shifts. The fixing bolt 709 transmits this displacement to the sphere 705, which in turn transmits it to the disc spring assembly 703, causing the disc spring assembly 703 to elastically deform. Through the synergistic action of the sphere 705 and the disc spring assembly 703, the bridge's multidimensional displacement is accommodated, and stress is dispersed. When a vehicle passes over the expansion joint, the resulting impact force is transmitted from the fixed comb plate 5 to the bottom stainless steel plate 801. The stainless steel plate 801 then transmits the impact force to the rubber block 802 and the damper 805. The rubber block 802 first buffers low-frequency vibrations, while the damper 805 further absorbs high-frequency vibration energy. Simultaneously, a portion of the impact force is transmitted to the disc spring assembly for buffering. Through multi-stage buffering and energy dissipation, vibration reduction and noise reduction of the bridge expansion joint are achieved, ensuring the stable operation of the bridge. This completes all the work. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A damping and vibration-reducing multi-directional displacement comb-plate bridge expansion joint, comprising a main bridge side (1) and an approach bridge side (2), characterized in that: The main bridge side (1) and the approach bridge side (2) of the bridge are both provided with a concrete layer (3), and a steel frame (4) is provided inside the concrete layer (3). The inner wall of the approach bridge side (2) is provided with a fixed comb plate (5), the inner wall of the main bridge side (1) is provided with a movable comb plate (6), the inner wall of the concrete layer (3) is provided with an installation component (7), and the bottom of the fixed comb plate (5) is provided with a buffer component (8). The mounting assembly (7) includes a fixing frame (701), and a fixing box (702) is fixedly connected to one end of the fixing frame (701). A disc spring assembly (703) is provided at the bottom of the fixing box (702), and a wear-resistant sleeve (704) is fixedly connected to the top of the fixing box (702). A ball (705) is rotatably connected to the inner wall of the wear-resistant sleeve (704), and a threaded hole (706) is opened on the inner wall of the ball (705). An installation groove (707) is opened on the top of the fixing comb plate (5), and a pad (708) is slidably connected to the inner wall of the installation groove (707). A fixing bolt (709) is provided on the outer wall of the pad (708). The buffer assembly (8) includes a stainless steel plate (801), and a rubber block (802) is fixedly connected to the bottom of the stainless steel plate (801). The inner wall of the rubber block (802) is provided with a through hole (803). The concrete layer (3) is provided with a fixing groove (804), and a damper (805) is fixedly connected to the inner wall of the fixing groove (804).

2. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: The inner wall shape and size of the wear-resistant sleeve (704) match the outer wall shape and size of the sphere (705), and the inner wall of the wear-resistant sleeve (704) fits against the outer wall of the sphere (705).

3. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: One end of the fixing bolt (709) passes through the washer (708) and extends into the threaded hole (706) for connection.

4. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: The number of mounting slots (707) is multiple, and the multiple mounting slots (707) are equally spaced on the fixed comb plate (5).

5. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: The fixing frame (701) is L-shaped.

6. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: The inner wall shape and size of the fixing groove (804) match the outer wall shape and size of the damper (805), and the inner wall of the fixing groove (804) fits against the outer wall of the damper (805).

7. The damping and vibration reduction multi-directional displacement comb-plate bridge expansion joint device according to claim 1, characterized in that: One end of the damper (805) is connected to the stainless steel plate (801) through the through hole (803).

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