Bridge Expansion Device Bolt-Free Mounting
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Solution Overview
Problem
Conventional bridge expansion and contraction devices are complex, difficult to adjust, and noisy due to bolt connections, and they struggle with achieving the required flatness between the device and the bridge floor.
Innovation Solution
A bridge expansion and contraction device that is adjustable in height and can be mounted without bolts, featuring a gap crossing plate, a fixed plate, height adjustment assemblies, lower support base assemblies, a rotating shaft assembly, and upper pressing assemblies, which allow for easy installation and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional comb-plate-formed expansion and contraction joints are used, then the expansion and contraction requirements of bridge beams are met, but the device becomes complicated and difficult to adjust at the construction site
Solution Approach 1:
The device is divided into modular components including a gap crossing plate, fixed plate, height adjustment assembly, lower support base assembly, rotating shaft assembly, and upper pressing assembly. Each component can be independently manufactured and assembled, simplifying the overall structure while maintaining expansion and contraction functionality.
Solution Approach 2:
The device incorporates adjustable height mechanisms and rotating shaft assemblies that allow dynamic adaptation to bridge deformation. The height adjustment assembly enables vertical movement, and the rotating shaft assembly facilitates rotational movement, allowing the device to adapt to varying bridge conditions without complex fixed structures.
2Strength
If bolt connections are used to connect comb plates, then the structural connection is secure, but multiple bolt holes are formed on plate surfaces leading to high noise when vehicles run
Solution Approach 1:
The bolt connection system is completely removed from the device. Instead of using bolts to connect the gap crossing plate to the fixed plate, the invention employs a friction-fit mechanism with a rotating shaft assembly that eliminates the need for bolt holes in the plate surfaces, thereby reducing noise while maintaining connection strength.
3Ease of manufacture
If conventional expansion and contraction devices are installed, then the device can be mounted on the bridge, but it is difficult to adjust the flatness between the device and the bridge floor
Solution Approach 1:
The device includes pre-configured height adjustment assemblies and lower support base assemblies that are prepared in advance for positioning. The gap crossing plate and fixed plate are designed with predetermined mounting features that facilitate easy alignment and flatness adjustment during installation, eliminating the need for complex on-site adjustments.
Data Source
AI summary
A bridge expansion and contraction device comprises a gap crossing plate disposed in a first mounting recess and a fixed plate dispose in a second mounting recess. One or more height adjustment assemblies, lower support base assemblies, a rotating shaft assembly and upper pressing assemblies are disposed in the first mounting recess. Each lower support base assembly is connected to one corresponding height adjustment assembly, the rotating shaft assembly is supported on the lower support base assemblies, each upper pressing assembly is connected to the one corresponding height adjustment assembly and located above the aforementioned lower support base assembly and presses the rotating shaft assembly. In a process of mounting, the flatness between the expansion and contraction device and the bridge floor is adjusted, and the device can be mounted quickly without bolts. The present invention further discloses an installation method of the bridge expansion and contraction device.