A lateral displacement resistant bridge bearing

Abstract

The utility model relates to related technical field of bridge engineering especially, and more particularly to a bridge support that resists lateral displacement, including upper support plate, lower support plate, elastic buffer assembly and anti -drift limiting component, the upper support plate is located the upper side of lower support plate, and the both sides are connected through elastic buffer assembly and anti -drift limiting component, the elastic buffer assembly includes including upper connector, buffer box, baffle, upper buffer spring and lower buffer spring. The utility model adopts two -level buffer structure of upper buffer spring and lower buffer spring, can realize hierarchical absorption to different magnitude vertical load, and four sets of elastic buffer assemblies are along the central axis symmetry distribution, ensure that vertical load evenly transmits to lower support plate, avoid local stress concentration, and the anti -drift limiting component of central position cooperates with the periphery buffer assembly, can cope with longitudinal and transverse displacement simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge engineering, and in particular to a bridge bearing that resists lateral displacement. Background Technology

[0002] Bridge bearings are key components connecting the superstructure and substructure of a bridge. Their main function is to transfer the load borne by the superstructure to the substructure. Most bearings only use a single elastic element for buffering, which is difficult to adapt to the impact of loads of different magnitudes. Traditional restraint structures mostly use rigid contact restraint, which is prone to rigid collision when the bridge undergoes lateral displacement, leading to local stress concentration in the bearing and even causing the bearing to crack. Therefore, a bridge bearing that resists lateral displacement is particularly needed.

[0003] To address the aforementioned issues, a bridge bearing designed to resist lateral displacement is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a bridge bearing that resists lateral displacement, in order to solve the problem of existing bridge bearings that resist lateral displacement mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bridge bearing resistant to lateral displacement, comprising an upper bearing plate, a lower bearing plate, an elastic buffer assembly, and an anti-deviation limiting assembly, wherein the upper bearing plate is located directly above the lower bearing plate, and the two are connected by the elastic buffer assembly and the anti-deviation limiting assembly; The elastic buffer assembly includes an upper connector, a buffer box, a partition, an upper buffer spring, and a lower buffer spring. The top end of the upper connector is fixedly connected to the upper support plate, and the bottom end passes through a perforation in the top of the buffer box and extends into the interior of the buffer box. The partition is horizontally disposed inside the buffer box and is fixedly connected to the bottom end of the upper connector. The upper buffer spring is sleeved on the outside of the upper connector, and its two ends abut against the bottom surface of the upper support plate and the top surface of the buffer box, respectively. The lower buffer spring is disposed inside the buffer box, and its two ends abut against the bottom surface of the partition and the bottom surface of the buffer box, respectively. The bottom end of the buffer box is integrally formed with the lower support plate.

[0006] Preferably, the anti-deviation limiting component includes a limiting boss, a limiting seat, and an elastic buffer block. The top of the limiting boss is integrally formed with the bottom surface of the upper support plate, the bottom of the limiting seat is integrally formed with the top surface of the lower support plate, and the elastic buffer block is an elastic component, with the bottom surface of the elastic buffer block matching the contact surface of the limiting seat.

[0007] Preferably, the anti-deviation limiting component further includes a boss adapter groove formed on the limiting seat, wherein the boss adapter groove is adapted to the convex surface of the limiting boss.

[0008] Preferably, the elastic buffer assembly and the anti-offset limiting assembly work together to absorb the impact of the vertical load on the bridge through the elastic deformation of the upper and lower buffer springs, limit the relative offset between the upper and lower support plates through the elastic deformation of the elastic buffer block, and provide buffering force when the offset is reset.

[0009] Preferably, the elastic buffer components are symmetrically distributed along the central axis of the upper support plate and the lower support plate, and there are four groups, with equal spacing between adjacent groups of elastic buffer components.

[0010] Preferably, both the upper and lower buffer springs are high-strength helical springs, and the stiffness coefficient of the upper buffer spring is greater than that of the lower buffer spring.

[0011] Preferably, the buffer box is a hollow cuboid structure with an open top.

[0012] Preferably, both the upper and lower support plates are made of high-strength alloy steel plates, and the top surfaces of both the upper and lower support plates are provided with anchoring holes for connection with the bridge superstructure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This device adopts a two-stage buffer structure with upper and lower buffer springs, which can absorb vertical loads of different magnitudes in stages. Four sets of elastic buffer components are symmetrically distributed along the central axis to ensure that the load is evenly transferred to the lower support plate and avoid local stress concentration. The anti-deviation limiting component at the center position works with the surrounding buffer components to cope with longitudinal and lateral displacements at the same time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the elastic buffer assembly of this utility model. Figure 1 ; Figure 3 This is a cross-sectional view of the elastic buffer assembly of this utility model. Figure 2 ; Figure 4 This is a cross-sectional view of the anti-deviation limiting component of this utility model.

[0015] In the diagram: 1. Upper support plate; 2. Lower support plate; 3. Elastic buffer assembly; 301. Upper connector; 302. Buffer box; 303. Partition; 304. Upper buffer spring; 305. Lower buffer spring; 306. Perforation; 4. Anti-deviation limiting assembly; 401. Limiting boss; 402. Limiting seat; 403. Elastic buffer block; 404. Boss adapter groove. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Example like Figure 1-3 As shown, the system includes an upper support plate 1, a lower support plate 2, an elastic buffer assembly 3, and an anti-deviation limiting assembly 4. The upper support plate 1 is located directly above the lower support plate 2, and the two are connected by the elastic buffer assembly 3 and the anti-deviation limiting assembly 4. The elastic buffer assembly 3 includes an upper connector 301, a buffer box 302, a partition 303, an upper buffer spring 304, and a lower buffer spring 305. The top end of the upper connector 301 is fixedly connected to the upper support plate 1, and the bottom end passes through the top opening of the buffer box 302. A perforation 306 is provided and extends into the buffer box 302. A partition 303 is horizontally set inside the buffer box 302 and fixedly connected to the bottom end of the upper connector 301. An upper buffer spring 304 is sleeved on the outside of the upper connector 301 and its two ends abut against the bottom surface of the upper support plate 1 and the top surface of the buffer box 302, respectively. A lower buffer spring 305 is set inside the buffer box 302 and its two ends abut against the bottom surface of the partition 303 and the bottom surface of the inner side of the buffer box 302, respectively. The bottom end of the buffer box 302 is integrally formed with the lower support plate 2.

[0018] It should be noted that in this embodiment, the top end of the upper connector 301 is fixed to the bottom surface of the upper support plate 1 by welding, and the bottom end is welded to the partition plate 303. The buffer box 302 is a hollow rectangular steel box with an open top. The perforation 306 on the top is clearance-fitted with the upper connector 301. The bottom of the box body and the lower support plate 2 are formed by an integrated casting process. The partition plate 303 is made of alloy steel plate and can slide up and down along the groove to achieve vertical displacement guidance. There are three sets of upper buffer springs 304. The upper buffer spring 304 located in the middle position is sleeved on the outside of the upper connector 301. The lower buffer spring 305 is set in the buffer box 302 and its two ends abut against the bottom surface of the partition plate 303 and the buffer box 302 respectively. 02 The bottom surface of the buffer box 302 is integrally formed with the lower support plate 2, and three sets of lower buffer springs 305 are also provided, which are on the same vertical horizontal line as the upper buffer springs 304. When the bridge is under load, the upper support plate 1 transmits pressure downwards, and the upper buffer springs 304 are compressed first. They use their high stiffness coefficient to bear the initial impact load and absorb vertical energy through elastic deformation. The pressure is transmitted to the partition plate 303 through the upper connector 301, which causes the lower buffer springs 305 to be further compressed. Their low stiffness coefficient can achieve secondary buffering and absorb the remaining vertical energy. The inner wall of the buffer box restricts the horizontal displacement of the partition plate to ensure that the spring only undergoes axial deformation and avoids spring failure caused by lateral force.

[0019] like Figure 4As shown, the anti-deviation limiting component 4 includes a limiting boss 401, a limiting seat 402, and an elastic buffer block 403. The top of the limiting boss 401 is integrally formed with the bottom surface of the upper support plate 1, and the bottom of the limiting seat 402 is integrally formed with the top surface of the lower support plate 2. The elastic buffer block 403 is an elastic component, and the bottom surface of the elastic buffer block 403 is adapted to the contact surface of the limiting seat 402. The anti-deviation limiting component 4 also includes a boss adaptation groove 404 opened on the limiting seat 402 that is adapted to the convex surface of the limiting boss 401.

[0020] It should be noted that in this embodiment, the anti-deviation limiting component 4 is located in the central area of ​​the support. The limiting boss 401 is a stepped cylindrical structure with a larger upper part and a smaller lower part, integrally forged with the bottom surface of the upper support plate 1. The limiting seat 402 is a frame structure with an open top, integrally cast with the top surface of the lower support plate 2. The inner side wall boss has an adapter groove 404. The elastic buffer block 403 is made of polyurethane material with a Shore hardness of 70° and is fixed to the lower inner side wall of the limiting boss 401 through a vulcanization process. When the limiting boss 401 is at its highest point, the limiting boss 401... The lower section of the protruding column 01 is still inside the protrusion fitting groove 404. When the bridge is displaced due to temperature changes, vehicle braking or earthquakes, the upper support plate 1 causes the limiting protrusion 401 to shift horizontally relative to the limiting seat 402. The side wall of the limiting protrusion gradually squeezes the elastic buffer block 403. The elastic buffer block 403 generates a reverse elastic force through its own deformation, which increases linearly with the increase of the offset. When the force disappears, the restoring force of the elastic buffer block pushes the limiting protrusion to reset. The elastic buffer block 403 can also absorb part of the vertical stress by relying on its own elasticity.

[0021] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-4 When the bridge is under load, the upper support plate 1 transmits pressure downwards, and the upper buffer spring 304 is compressed first. It uses its high stiffness coefficient to bear the initial impact load and absorbs vertical energy through elastic deformation. The pressure is transmitted to the partition plate 303 through the upper connector 301, which causes the lower buffer spring 305 to be further compressed. Its low stiffness coefficient can achieve secondary buffering and absorb the remaining vertical energy. The inner wall of the buffer box restricts the horizontal displacement of the partition plate, ensuring that the spring only undergoes axial deformation and avoiding spring failure caused by lateral force. The upper support plate 1 causes the limiting boss 401 to shift horizontally relative to the limiting seat 402. The side wall of the limiting boss gradually squeezes the elastic buffer block 403. The elastic buffer block 403 generates a reverse elastic force through its own deformation, which increases linearly with the increase of the offset. When the force disappears, the restoring force of the elastic buffer block pushes the limiting boss to reset. The four sets of elastic buffer components 3 are evenly distributed to ensure the load is distributed and transferred in a distributed manner, avoiding local stress concentration. Both the elastic buffer components 3 and the anti-deviation limiting components 4 can simultaneously limit longitudinal and lateral displacement, forming a layout of peripheral buffer center limiting to achieve multi-dimensional force balance.

[0022] 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 of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge bearing resistant to lateral displacement, characterized in that: It includes an upper support plate (1), a lower support plate (2), an elastic buffer assembly (3), and an anti-offset limiting assembly (4). The upper support plate (1) is located directly above the lower support plate (2), and the two are connected by the elastic buffer assembly (3) and the anti-offset limiting assembly (4). The elastic buffer assembly (3) includes an upper connector (301), a buffer box (302), a partition (303), an upper buffer spring (304), and a lower buffer spring (305). The top end of the upper connector (301) is fixedly connected to the upper support plate (1), and the bottom end passes through the perforation (306) opened at the top of the buffer box (302) and extends into the interior of the buffer box (302). The partition (303) is horizontally arranged inside the buffer box (302) and fixedly connected to the bottom end of the upper connector (301). The upper buffer spring (304) is sleeved on the outside of the upper connector (301) and its two ends abut against the bottom surface of the upper support plate (1) and the top surface of the buffer box (302) respectively. The lower buffer spring (305) is arranged inside the buffer box (302) and its two ends abut against the bottom surface of the partition (303) and the bottom surface of the buffer box (302) respectively. The bottom end of the buffer box (302) is integrally formed with the lower support plate (2).

2. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: The anti-deviation limiting component (4) includes a limiting boss (401), a limiting seat (402), and an elastic buffer block (403). The top of the limiting boss (401) is integrally formed with the bottom surface of the upper support plate (1), the bottom of the limiting seat (402) is integrally formed with the top surface of the lower support plate (2), and the elastic buffer block (403) is an elastic component, and the bottom surface of the elastic buffer block (403) is adapted to the contact surface of the limiting seat (402).

3. A bridge bearing resisting lateral displacement according to claim 2, characterized in that: The anti-deviation limiting component (4) also includes a boss adapter groove (404) opened on the limiting seat (402), and the boss adapter groove (404) is adapted to the convex surface of the limiting boss (401).

4. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: The elastic buffer assembly (3) and the anti-offset limiting assembly (4) work together to absorb the impact of the vertical load on the bridge through the elastic deformation of the upper buffer spring (304) and the lower buffer spring (305), and limit the relative offset between the upper support plate (1) and the lower support plate (2) through the elastic deformation of the elastic buffer block (403), and provide buffering force when the offset is reset.

5. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: The elastic buffer components (3) are symmetrically distributed along the central axis of the upper support plate (1) and the lower support plate (2), and there are four groups, with equal spacing between adjacent groups of elastic buffer components (3).

6. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: Both the upper buffer spring (304) and the lower buffer spring (305) are high-strength helical springs, and the stiffness coefficient of the upper buffer spring (304) is greater than that of the lower buffer spring (305).

7. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: The buffer box (302) is a hollow cuboid structure with an open top.

8. A bridge bearing resisting lateral displacement according to claim 1, characterized in that: Both the upper support plate (1) and the lower support plate (2) are made of high-strength alloy steel plates, and the top surfaces of both the upper support plate (1) and the lower support plate (2) are provided with anchoring holes for connection with the superstructure of the bridge.

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