Large-span normal-conducting high-speed magnetic levitation bridge parting and rail surface smoothness improving structure

Abstract

The invention discloses a gear-driven large-span normal-conducting high-speed magnetic levitation bridge parting and rail surface smoothness improving structure which comprises a parting bearing beam, a span beam seam beam unit and N-1 parting beam units. The parting beam units are slidably supported on the upper surface of the parting bearing beam and one side of the span beam seam beam unit to form N parting beam seams; a push-pull rod is longitudinally arranged on the parting bearing beam in a sliding mode, one end of the push-pull rod extends out to be hinged to the beam end of the first bridge, racks are arranged on the opposite faces of the push-pull rod and the N-1 parting beam units, and N-1 gear sets are correspondingly arranged between the upper rack and the lower rack. A gear mechanical device is adopted for driving to automatically convert a large expansion amount into a plurality of equal small expansion amounts, so that the beam seam gap variation is reduced, and the irregularity of a beam end corner bulge is reduced, which plays a very important role in improving the running of a normal-conducting high-speed maglev train.

Description

technical field [0001] The invention belongs to the field of girder gap devices for long-span, constant-conduction, high-speed maglev bridges, and in particular relates to a gear-driven long-span, constant-conduction, high-speed maglev bridge and a structure for improving the smoothness of the rail surface. Background technique [0002] Such as Figure 1a As shown in -b, the Chinese patent "A large-displacement bridge expansion device suitable for high-speed maglev traffic engineering" (authorized announcement number CN 202298456 U, authorized announcement date 2012.07.04) although it is an ingenious design, it theoretically has scattered small The characteristics of uniform and synchronous expansion and contraction of the seam, and other types of seam splitting devices, all have the driving force from the telescopic movable end to the other end, and gradually overcome the friction force and finally spread to all the seams. However, their synchronization is "theoretical Sync...

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Problems solved by technology

[0002] like Figure 1a As shown in -b, the Chinese patent "A large-displacement bridge expansion device suitable for high-speed maglev traffic engineering" (authorized announcement number CN 202298456 U, authorized announcement date 2012.07.04) although it is an ingenious design, it theoretically has scattered small The characteristics of uniform and synchronous expansion and contraction of the seam, and other types of seam splitting devices, all have the driving force from the telescopic movable end to the other end, and gradually overcome the friction force and finally spread to all the seams. However, their synchronization is "theoretical Synchronization on "'

[0003] Moreover, for the prior art listed above, the telescopic device rests on a non-plane (main beam) with flexural deformation, so in work, the hinge shaft link system in the existing device will be subject to The bending effect outside the deformation plane, therefore, the hinge device is prone to mechanical "locking" phenomenon, resulting in temporary failure, affecting the reliability and durability of the device, which is a potential safety hazard for maglev transportation

[0004] The above-mentioned hinge system also has a disadvantage. When it is transferred from one end to the other, the tolerance of the hinge will be squeezed in one direction, so that the expansion and contraction of the two ends will not be equal, resulting in high requirements for the manufacturing accuracy of the hinge, which is difficult to manufacture. And difficult to maintain

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