Torsion bar elastic constraint spherical steel support

By designing a torsion bar elastically constrained spherical steel bearing, and utilizing torsion bar components and guiding structures to convert the longitudinal displacement of the bridge into torsion, the problem of concentrated expansion and contraction displacement in long-span bridges is solved, enhancing the stiffness and bolt stress of the bridge, and improving the stability and driving comfort of the bridge.

CN223753193UActive Publication Date: 2026-01-02CHINA RAILWAY DESIGN GRP CO LTD
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Patent Information

Application Number
CN202520148556.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-22
Publication Date
2026-01-02
Estimated Expiration
2035-01-22

AI Technical Summary

Technical Problem

The expansion and contraction displacements of existing long-span bridges are concentrated on one side, resulting in asymmetrical bridge structures, which affects the stability of the bridge and driving comfort. Existing elastic restraint supports have poor stiffness stability, and the displacement range of torsion bar systems is limited.

Method used

A torsion bar elastically constrained spherical steel bearing is designed. The longitudinal displacement of the bridge is converted into torsion through the torsion bar assembly and the guide structure. The bolt stress is optimized by the cooperation of the torsion arm and the side plate slider, thereby enhancing the stiffness and displacement range.

Benefits of technology

It achieves high-precision stiffness and a wide range of displacement for bridge bearings, optimizes bolt stress, is suitable for the expansion and contraction displacement adjustment of long-span bridges, and improves bridge stability and driving comfort.

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Abstract

The utility model discloses a torsion bar elastic restraint spherical steel support which comprises a longitudinal spherical steel support, the longitudinal spherical steel support comprises a fixed support bottom plate located at the bottom, a support bottom basin is arranged on the support bottom plate in a sliding mode, a torsion bar assembly for restraining and limiting is arranged on the support bottom plate, and the longitudinal spherical steel support comprises a longitudinal spherical steel support body. The torsion bar assemblies are arranged on the two opposite side faces of the support bottom basin. Horizontal movement of the pin shaft end of the torsion arm is restrained through the side plate slide way, rigid rotation of the torsion arm is achieved when the support moves, and the torsion arm rotates to drive the torsion rod spring to twist; a connecting rod assembly is removed, so that the structure is more compact; and the direction of external force is parallel to the axis of the fixing bolt, so that the stress of the bolt is optimized, and the bridge support is more suitable for the application scene of the bridge support.
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