Casting-free plastic-free large-adjustment-amount high-elasticity anti-theft rail fastener

Abstract

The invention relates to a rail fastener used in rail transit. The rail fastener is used for solving the problem that existing rail fasteners large in rail position adjustment amount and good in damping performance are complicated in structure and high in price. According to the rail fastener, the parts of the rail fastener are manufactured through the combination of section steel rolling and machining. According to the structure of the rail fastener, the lower portion of an embedded base is embedded in a sub-rail foundation, the embedded base enables an elastic strip to generate fastening force together with a lock nut, the fastening force is applied to the sub-rail foundation through a gauge block, a rail, a rubber pad, a height-adjusting cushion plate and a shock pad to fix the rail in the vertical direction, the rail is fixed in the horizontal direction by the embedded base and the gauge block, the maximum adjustment amount of the rail height and the maximum adjustment amount of the gauge reach over 30 mm and 24 mm respectively, and vertical stiffness can be set to be low to increase the elasticity of the rail. The rail fastener has the advantages of being free of casting, free of plastic, high in strength, high in elasticity, large in adjustment amount, capable of guarding against theft, small in number of parts, low in manufacturing cost and the like and can be applied to ballast tracks, ballastless tracks and other types of tracks in rail transit and urban mass transit.

Description

technical field [0001] The invention relates to a rail fastener used for fixing rails on a line in rail transit, and relates to a rail fastener with new raw materials, a new manufacturing method and a new structure. The invention is applicable to various forms of tracks such as ballasted and ballastless tracks of railways and urban rail transit. Background technique [0002] In rail transit, rail fasteners firmly connect the rail and the subrail foundation, and are important components in the rail construction. [0003] In the prior art, ballasted tracks generally use sleeper shoulders, non-split type, elastic rail fasteners with bolts. This type of rail fastener is composed of 11 to 14 parts, and the sleeper shoulder bears the lateral force of the rail; the maximum adjustment of the rail height and gauge of this type of rail fastener is 10mm and 20mm respectively. There is also a sleeper shoulderless and boltless elastic rail fastener on the ballasted track, which consist...

AI Technical Summary

Problems solved by technology

Sulfur anchoring has the following problems: ① low pull-out resistance; ② on-site construction is complicated, labor-intensive and time-consuming; ③ during the heating process of sulfur, a large amount of harmful gas is produced, which seriously pollutes the environment and affects the health of workers; ④ H in the sulfur anchoring agent 2 S, S 2 , SO 2 When combined with water, it will cause corrosion of threaded spikes and other disadvantages

The pre-embedded casing has the following disadvantages: ①The strength is low, the thread is easily damaged and the connection fails; ②When the spiral spike is loose, the friction force under the iron backing plate will decrease, causing the spiral spike to bend or even break and fail.

In the boltless elastic rail fasteners, the insulating gauge blocks made of engineering plastics have low strength and have disadvantages such as crushing phenomenon

[0008] In the rail fastening system of the prior art, many components are made of cast iron or plastic, which has low strength, large amount of materials, and high manufacturing cost

In particular, the production process of iron castings is complicated and causes great environmental pollution.

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