A comb-tooth type multi-directional displacement bridge expansion device

Abstract

The invention relates to the bridge dilatation joint technology field, and particularly relates to a comb-type multidirectional displacement bridge telescoping apparatus, wherein, each tooth of a fixed tooth plate is bolted to a fixed beam body; a slide tooth plate is shaft-connected to a slide beam body at the comb back far from the tooth through a rotating shaft apparatus; a gap is left betweena side beam and the slide tooth plate; the slide tooth plate is provided with an elastic straining device between the comb back close to the tooth and the slide beam body for restricting downward displacement of the slide tooth plate and the slide beam body. Compared with prior art, the downward displacement is solved through the relative movement of the slide tooth plate and the fixed beam body;a lower shaft rotates relatively little, which is solved by further compression of a spring; at the same time, the slide tooth plate is pressed on the fixed beam body surface through the spring, preventing jumping gear; furthermore, garbage is removed through a wear resistant-rod arranged under the slide tooth plate, preventing jumping gear caused by the garbage.

Description

technical field [0001] The invention relates to the technical field of bridge expansion joints, in particular to a comb-tooth type multi-directional displacement bridge expansion device. Background technique [0002] With the rapid growth of my country's economy, the span of highway bridges is increasing, and steel box girders have become the mainstream of long-span bridges. Of course, there will be a certain amount of displacement and rotation due to temperature, wind force, winding deformation, rising or sinking, etc. The use of low-noise comb-type multi-directional displacement bridge expansion devices to solve these problems also occupies a certain proportion. In addition to the tooth-shaped seam itself adapting to the displacement and rotation of the bridge, and when the vehicle drives on the bridge deck, it will also give a certain X-direction horizontal force to the tooth-shaped seam. In the traditional design, on the one hand, it is often impossible to substantially ...

AI Technical Summary

Problems solved by technology

In the traditional design, on the one hand, it is often impossible to substantially separate the sliding tooth plate from the concrete. When solving the horizontal force, it may affect the rotation function of the toothed joint. Many designs cannot solve the XYZ axis simultaneously. rotation function

On the other hand, when the sliding tooth plate slides relative to the fixed tooth plate, due to the unsound garbage cleaning system, the garbage between the tooth grooves of the fixed tooth plate will cause warping of the sliding tooth plate after a long time, resulting in the fixed sliding tooth plate If the bolts fail, many unsafe hidden dangers will be caused, and in severe cases, the entire telescopic device will be damaged, endangering traffic safety.

[0003] Although now in order to solve the rotational torque of the sliding tooth plate on the horizontal plane, that is, the rotational force of the Z axis, someone has designed a spherical body on the bottom surface of the sliding tooth plate, and a base for accommodating the spherical body on the top surface of the sliding beam body. Generally, fasteners are used to fasten the bridge surface to solve the X-axis rotational force, but due to the torsional force brought by vehicle movement, it is easy to break the fasteners fixing the base, which cannot be solved well. horizontal force

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