Gear synchronous displacement modular expansion joint

Abstract

The invention discloses a gear synchronous displacement modular expansion joint which comprises bridge main bodies arranged at intervals, a displacement box fixedly arranged at the lower part of the two bridge main bodies, a horizontal cross beam which extends across the gap between the main bodies of the bridge along the length direction of the bridge main body arranged between the two relative displacement boxes; the cross beam is provided with a middle beam which is perpendicular to the cross beam and extends along the width direction of the bridge main body; the lower surface of the middlebeam is fixedly provided with a gear protection box, an expansion joint sliding connection device is arranged in the gear protection box, and two ends of the expansion joint sliding connection deviceare respectively fixedly connected with a rack fixing part embedded in the bridge main body. The device has the advantages of simple structure, convenient maintenance and disassembly, and the expansion joint sliding connection device can realize the free expansion and contraction movement of the expansion joint when the stress of the two ends of the bridge main body is not uniform, and the problem of easy damage due to uneven stress is overcome. The gear synchronous displacement modular expansion joint is suitable for use as a connecting device in a bridge expansion joint.

Description

technical field [0001] The invention belongs to the field of bridge expansion joint devices, and relates to a gear synchronous displacement modular expansion joint. Background technique [0002] The bridge telescopic device is an important part connecting the two parts of the bridge body. Its functions in terms of load bearing, expansion and contraction, and waterproof will directly affect the overall life of the bridge. The existing expansion joint device is a cross structure. When the bridge body expands with heat and contracts with cold, it will drive the four-bar linkage device to shrink or relax. However, in this structure, the two ends of the bridge body drive the cross structure and The fulcrums of the four links connected to the bridge body are compressed or expanded. When the force on both ends of the bridge body is uniform, the force on each fulcrum of the four links is uniform. When the force on the bridge body is uneven, it is easy to cause a point of the four li...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a gear synchronous displacement modulus expansion joint. The device has a simple structure, is easy to maintain and disassemble, is stable and has a good shockproof effect, and the cooperation of the rack and the gear in the sliding connection device of the expansion joint can be realized When the force on the main body of the bridge body at both ends is uneven, the expansion joints can freely expand and move, which overcomes the problem that the connecting device of the expansion joint is easily damaged due to uneven force on the main body of the bridge body.

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