Easily detachable and separable double-layer shock-absorbing fastener system

Abstract

The invention belongs to the field of rail transit, and provides an easily detachable and separable double-layer shock-absorbing fastener system. The easily detachable and separable double-layer shock-absorbing fastener system comprises an elastic strip (2), an elastic insulation pad (4) under track, an upper bottom plate (5), a bottom plate elastic insulation pad (6), a lower bottom plate (7) and an anchor bolt (11); a boss (14) which is arranged on the lower bottom plate (7) penetrates through a through hole in the upper bottom plate (5); after rotating relative to the boss (14), a bottom plate connecting sleeve (8) which is sleeved on the boss (14) forms convex and concave connection with the boss (14) on the lower bottom plate or the lower bottom plate (7), so as to be axially limited; the bottom plate connecting sleeve (8) is interlocked with the boss (14) in a radial direction under the action of an interlocking mechanism; and the upper eave part (13) of the bottom plate connecting sleeve (8) is buckled at the upper part of the upper bottom plate (5), and fastened on a road bed by the anchor bolt (11) through an interlocking cover plate (9).

Description

technical field [0001] The invention belongs to the field of urban rail transit, and in particular relates to an easily disassembled and separated double-layer damping fastener system. Background technique [0002] In recent years, domestic urban rail transit systems such as subways and light rails have developed rapidly, effectively alleviating the tension in urban traffic. In this series of construction, the fastener system is indispensable. The fastener is the connection between the rail and the sleeper. The connection with the rail is realized by buckling the rail with elastic strips, and the connection with the sleeper is realized by fixing with anchor bolts. [0003] The double-layer vibration-damping fastener has been widely used because it has two layers of vibration-damping rubber layers and thus has relatively excellent vibration-damping performance. However, there are still some problems in the existing double-layer damping fasteners with relatively mature design...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the existing double-layer damping fasteners with relatively mature designs. For example, to realize the connection of the upper and lower seat plates, two methods are usually used. One is to use anchor bolts to connect the upper and lower seat plates. It will cause the intermediate rubber pad to be unable to exert its elasticity, and it will inevitably lose part of the vibration reduction. At the same time, the shear of the anchor bolt caused by the lateral deviation of the iron pad cannot be ignored.

The second is to adopt the self-locking connection method of the upper and lower seat plates, which can give full play to the elasticity of the middle rubber cushion and have a good vibration damping effect, but the design fit tolerance needs to be controlled very precisely, otherwise it is easy to appear between the upper and lower iron plate of the fastener. Seam separation, insufficient pre-tightening force, and difficult adjustment, and once the fasteners are pre-assembled, there are also problems with the field detachability of the fasteners

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