A multi-stage height adjustment boltless fastener assembly

Abstract

The invention belongs to the technical field of rail transit, and provides a multistage height adjustment bolt-free fastener system. The multistage height adjustment bolt-free fastener system comprises an embedment base (1), an elastic strip (3), an insulating gauge block (4) and an under-rail elastic cushion plate (5), wherein an adjustment sleeve (2) is arranged on the embedment base (1), an elastic strip installation hole (9) is formed in the adjustment sleeve (2) in an eccentric mode, the position of the elastic strip installation opening (9) which is formed in the eccentric mode in the embedment base (1) is adjusted by adjusting the position of the adjustment sleeve (2) on the embedment base (1), and the height of a steel rail is adjusted under the rail when the adjustment sleeve is matched with an under-rail height adjustment plate (13) arranged between the steel rail (6) and a track bed (21). The aim of adjusting the height of the bolt-free fastener system under the steel rail is achieved by adjusting the position of the elastic strip, and the multistage height adjustment bolt-free fastener system has the advantages of being simple in structure and convenient to install and adjust.

Description

technical field [0001] The invention belongs to the technical field of railway tracks, and in particular relates to a multi-stage height adjustment boltless fastener assembly. Background technique [0002] Fasteners in the railway track system of rail transit are the key components for connecting and fixing rails and ballast beds or sleepers. As early as the 1960s, the pre-embedded boltless fastener system developed by Pandrol in the United Kingdom, including single Toe spring clip ( Figure 12 ), "e" type clip fasteners ( Figure 13 ) and the fast clip fastener developed in the 1990s ( Figure 14 ) system has been widely used on railway tracks all over the world due to the advantages of less system components, easy installation and maintenance, safety, stability and reliability, and low cost, especially in ballasted bed systems. During construction, operation and maintenance, the ballast under the sleeper is only used for adjustment, that is, it is adjusted by tamping the...

AI Technical Summary

Problems solved by technology

However, since this type of fastener system uses anchor bolts to connect the sleepers and elastic bars, the deformation and vibration of the rail under the train load will directly affect the fastening state of the bolts through the elastic bars, which will easily lead to loosening of the bolts and cause safety failure. Hidden dangers, etc. On the other hand, due to the needs of maintenance, the bolt fastening system also needs frequent oiling and maintenance, etc.

Since the fastener system with bolt clips has many parts and complex installation, the fastening pressure of the clip installation is indirectly controlled by the bolt installation torque, while the friction characteristics of the anchorage system are difficult to accurately control the clips with torque due to the influence of rust on metal parts. Buckle spring travel, so that the fastener system is not easy to maintain the uniform stability of the buckle pressure during maintenance

At the same time, because the anchor bolts are connected with the nylon sleeves embedded in the sleeper or ballast bed, the multiple fastening and disassembly of the anchor bolt system and the high dynamic force and high stress under the operating load will easily lead to damage to the nylon sleeve and the sleeper. , greatly increasing the track maintenance workload

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