Bridge expansion joint

By adopting a comb-tooth plate expansion joint and synchronous half-shaft rubber bearing design in the bridge expansion joint, the problems of large vibration and high noise of the bridge expansion joint have been solved, realizing vibration reduction and noise reduction as well as flexible expansion and contraction in the horizontal direction, thereby improving the comfort and stability of the bridge.

CN224451360UActive Publication Date: 2026-07-03GUANGZHOU XINYUE TRANSPORTATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGZHOU XINYUE TRANSPORTATION TECH CO LTD
Filing Date
2025-04-16
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing bridge expansion joints exhibit significant vibration and noise, have high vertical stiffness but poor horizontal flexibility, and cannot meet the requirements for large turning angles.

Method used

The device employs a comb-plate telescopic mechanism, which includes two telescopic panels and pre-reserved grooves at the ends of the beam. It is equipped with synchronous half-shaft rubber supports at the bottom, combined with waste separation plates and drainage components. It uses a stainless steel waterproof groove and rubber plate structure, and its flexible design reduces rigid impact and minimizes noise and vibration.

Benefits of technology

It effectively reduces the rigid impact load of heavy vehicles, reduces noise and vibration, improves horizontal flexibility, meets the requirements of large turning angles, and ensures the stability and comfort of the bridge.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224451360U_ABST
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Abstract

The application provides a bridge expansion device, which comprises oppositely arranged comb tooth plate expansion devices and two beam body ends; the comb tooth plate expansion device comprises two expansion panels; the opposite sides of the two beam body ends are each provided with a reserved groove, an expansion joint is formed between the two reserved grooves, the two reserved grooves are each provided with the expansion panel, the two expansion panels are arranged on the two sides of the bridge expansion joint, and the cantilever end of the bottom of the expansion panel is provided with a synchronous half shaft rubber support. The synchronous half shaft rubber support arranged at the bottom of the expansion panel can reduce the rigid impact load of heavy load (overload) vehicles and has the performance of softening the rigidity; the load can be used to reduce the shear fatigue of the screw rod to the greatest extent, the damping and noise reduction are achieved, and the defects of large noise and large vertical rigidity caused by the impact of the traditional tooth plate joint steel on the steel are avoided.
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