Six-freedom-degree modular pattern telescopic device and manufacturing technology thereof

Abstract

The invention belongs to the technical field of telescopic devices and discloses a six-freedom-degree modular pattern telescopic device and a manufacturing technology thereof. The telescopic device is mainly characterized in that side beam special-shaped steel, middle beam special-shaped steel, a displacement control box with a supporting horizontal beam, a side beam pressing support and a side beam pressure bearing support and a chain box provided with a transmission chain are included, a hanging frame, a middle beam pressing support and a middle beam pressure bearing support are arranged at the bottom of the middle beam special-shaped steel, the supporting horizontal beam is a solid cylinder or a hollow circular pipe body, the supporting horizontal beam is provided with a drum-shaped multi-direction flexure hinge, the contacting face of the side beam pressing support, the side beam pressure bearing support and the multi-direction flexure hinge is a concave spherical surface, the contacting face of the middle pressing support, the middle pressure bearing support and the supporting horizontal beam is a concave column face, the middle beam special-shaped steel is provided with a middle beam locating block, and a center shaft of a U-shaped locating shaft penetrates through the middle beam locating block. The telescopic device can achieve moving and rotating in a bridge-axis direction, in a direction perpendicular to the bridge-axis direction and in a vertical direction, and the requirements for beam body temperature changing, vehicle rolling, and rotating angles and displacement generated through wind power can be met.

Description

technical field [0001] The invention belongs to the technical field of bridge expansion devices, in particular to a six-degree-of-freedom modular expansion device and a preparation process thereof. Background technique [0002] The currently used bridge expansion devices are more commonly used as modular expansion devices and comb plate expansion devices. [0003] The modular telescopic device is composed of side beams, middle beams, beams and linkage mechanisms. This structure only provides two degrees of freedom, namely, the temperature displacement along the bridge and the deflection deformation of the beam caused by the vehicle, that is, the rotation around the axis of the bridge. During the operation of the bridge, the following defects will occur: the deflection and deformation of the middle girder caused by the vehicle are restricted, and the welds between the hanger and the middle girder, the linkage device and the middle girder will be torn apart after multiple open...

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Problems solved by technology

[0003] The modular telescopic device is composed of side beams, middle beams, beams and linkage mechanisms. This structure only provides two degrees of freedom, namely, the temperature displacement along the bridge and the deflection deformation of the beam caused by the vehicle, that is, the rotation around the axis of the bridge. During the operation of the bridge, the following defects will occur: the deflection and deformation of the middle girder caused by the vehicle are restricted, and the welds between the hanger and the middle girder, the linkage device and the middle girder will be torn apart after multiple openings; The beam only bears the impact of the vehicle speed with a small weld seam, which will cause the weld joint to be sheared directly; the rotation around the plane center axis of the bridge is restricted by the beam, which directly blocks or even destroys the weak link; the bridge on both sides of the telescopic device is high When it is poor or staggered along the direction of the cross bridge, the force is directly applied to the body of the telescopic device, resulting in damage to the weak link, etc.

[0004] Although the structure of the comb plate telescopic device is different from that of the modular telescopic device, it only provides two degrees of freedom, and the restriction of the other four degrees of freedom directly leads to the destruction of the telescopic device.

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