摘要:
An anchoring device for use in a railway rail fastening assembly which employs a resilient railway rail fastening clip to fasten a railway rail, comprises a body having a front portion which is configured to provide a first load bearing surface extending alongside the rail foot when the device is in use, and first and second side faces respectively located on opposite sides of the body and configured to extend transversely away from the first portion. The device comprises first and second projecting portions, the first projecting portion extending outwardly from the first side face of the body and providing a first additional load bearing surface which is set back from the first load bearing surface, and the second projecting portion extending outwardly from the second side face of the body and providing a second additional load bearing surface which is set back from the first load bearing surface.
摘要:
Railway rail fastening apparatus, for suspending a railway rail at discrete locations along its length above a rail foundation, comprises two rail suspending assemblies located when in use one on each side of the rail. Each assembly comprises an elastic member for supporting the head of the rail on one side thereof and a bracket for applying a lateral clamping force to the elastic member. The rail suspending assembly on one side of the rail is located such that the center line of the assembly is offset with respect to that of the rail suspending assembly on the other side of the rail by x mm along the longitudinal axis of the rail, where x is 50≧x>0 mm.
摘要:
A method of manufacturing a resilient rail clip comprises bending a rod, made of metal having a hardness value falling within a known hardness value range, into a predetermined shape and then subjecting the bent rod to a cold setting process in order to induce in the bent rod a predetermined amount of permanent set (S). One cold setting process comprises applying a first load (F0) to part of the bent rod so as to cause a first amount of deflection of that part of the bent rod, which first load (F0) is a predetermined load having a value equal to or greater than that required to reach the yield point of metal having the highest hardness value in the said hardness value range, measuring the first amount of deflection (dX) of the said part of the bent rod achieved by applying the predetermined first load (F0), determining, on the basis of the measured deflection amount (dX), either (i) a second load (F0+ΔFX), which, when applied to the said part of the bent rod, will cause the bent rod to acquire the predetermined amount of permanent set (S), or (ii) a second amount of deflection (dX+ΔdX) of the said part of the bent rod required in order to bring about in the bent rod the predetermined amount of permanent set (S), and applying the second load (F0+ΔFX) to the said part of the bent rod or deflecting the said part of the bent rod by the determined second amount of deflection (dX+ΔdX). An alternative cold setting process comprises deflecting part of the bent rod by a predetermined first amount (d0) by applying a first load (FX) having a value equal to or greater than that required to reach the yield point of metal having the highest hardness value in the said hardness value range, measuring the amount of the first load (FX) required to achieve the predetermined first amount of deflection (d0), determining, on the basis of the measured load, either (i) a second deflection amount (d0+ΔdX) required in order to bring about in the bent rod the predetermined amount of permanent set (S), or (ii) a second load (FX+ΔFX), which, when applied to the said part of the bent rod, will cause the bent rod to acquire the predetermined amount of permanent set (S), and deflecting the said part of the bent rod by the determined second deflection amount (d0+ΔdX) or applying the determined second load (FX+ΔFX) to the said part of the bent rod.
摘要:
A component for use in a rail fastening assembly, the assembly comprising a railway rail fastening clip having a first part for bearing on a railway rail and a railway rail clip anchoring device for retaining the railway rail clip, comprises a first portion adapted to receive a lateral load from the rail when located between a substantially upright face of the rail clip anchoring device and the side of the foot of an adjacent railway rail when the assembly is in use. The component further comprises a second portion for receiving a second bearing part of the railway rail clip. The first portion and the second portion of the component are spaced apart and interconnected by a connection portion.
摘要:
A railway baseplate assembly comprising a baseplate (30), a cushioning pad (20) for lying beneath the baseplate (30), and means (10) for securing the baseplate (30) to an underlying rail foundation when the assembly is in use, wherein the said securing means (10) comprise a non-screw-threaded post member (12), which post member (12) extends, when in use, through holes (21, 31) provided in the baseplate (30) and cushioning pad (20) in such a way as to engage the said baseplate (30). The post member (12) and baseplate (30) may be such that engagement of the baseplate (30) with the post member (12) can be brought about by movement of the baseplate (30) relative to the post member (12) firstly in a direction substantially perpendicular to the plane of the baseplate (30) and towards the post member (12) so that the post member (12) extends through the hole (31) in the baseplate (30) and secondly in a direction substantially parallel to the plane of the baseplate so that the post member (12) engages the baseplate (30). The post member (12) is fastened, directly or indirectly, to the rail foundation and the post member (12), cushioning pad (20) and baseplate (30) may be such that the cushioning pad (20) and baseplate (30) can be brought into engagement with the post member (12) while the post member (12) is fastened to the rail foundation.
摘要:
An anchoring device for use in a railway rail fastening assembly which employs a resilient railway rail fastening clip to fasten a railway rail, comprises a body having a front portion, which is configured to provide a first load bearing surface extending alongside the rail foot when the device is in use, and first and second side faces, respectively located on opposite sides of the body and configured to extend transversely away from the first portion. The device comprises first and second projecting portions, the first projecting portion extending outwardly from the first side face of the body and providing a first additional load bearing surface which is set back from the first load bearing surface, and the second projecting portion extending outwardly from the second side face of the body and providing a second additional load bearing surface which is set back from the first load bearing surface.
摘要:
A component for use in a rail fastening assembly, the assembly comprising a railway rail fastening clip having a first part for bearing on a railway rail and a railway rail clip anchoring device for retaining the railway rail clip, comprises a first portion adapted to receive a lateral load from the rail when located between a substantially upright face of the rail clip anchoring device and the side of the foot of an adjacent railway rail when the assembly is in use. The component further comprises a second portion for receiving a second bearing part of the railway rail clip. The first portion and the second portion of the component are spaced apart and interconnected by a connection portion.
摘要:
In a railway rail pad having a rail seat portion for receiving a foot of a railway rail, the rail seat portion is provided on at least one major face thereof with a plurality of protrusions which are unevenly distributed across the face of the rail seat portion such that the ratio of the area of the face occupied by the protrusions to the area of the face free of protrusions is greater in an edge region of the rail seat portion than in a central region of the rail seat portion, the edge region being adjacent to one edge of the pad and the central region being adjacent to the edge region. The studs are arranged in columns, each stud being of substantially the same size, and the number of studs in a column in the central region which is closest to said edge region being greater than in a column closer to the centre of the rail seat portion. The studs are also arranged in rows, wherein the ratio of protrusions to free area in a row of studs adjacent to, but spaced from, the centre of the rail seat portion is greater than that in a row further from the centre.
摘要:
A sealing plate (2), for use with a rail clip anchoring device having a head and a stem which extends from the head into a concrete sleeper when the anchoring device is in use, wherein the plate is adapted for extending over the underside of the head when the stem of the device is being set in a concrete sleeper, thereby to prevent ingress of concrete into the head of the device, and for being retained on the surface of the sleeper thereafter, and a face (20) of the plate which is to be exposed on the surface of the sleeper is not adapted to receive part of a rail clip.
摘要:
A sealing plate for use with a rail clip anchoring device having a head and a stem which extends from the head into a concrete sleeper when the anchoring device is in use, is adapted for extending over the underside of the head when the stem of the device is being set in a concrete sleeper, thereby to prevent ingress of concrete into the head of the device, and for being retained on the surface of the sleeper thereafter. A major face of the plate, which is uppermost when the sleeper is in use, is provided with at least one clip seat portion for receiving part of a rail clip. In a method of manufacturing a concrete sleeper with at least one embedded rail clip anchoring device, the floor of a mould, from which the sleeper is to be formed, is provided with an aperture through which the head of an anchoring device is inserted and before concrete is introduced into the mould the aperture is sealed off around its edges and around the underside of the head of the anchoring device by placing a sealing plate over the aperture on the floor of the mould, the plate overlapping and sealing around the edges of the aperture other than where the anchoring device is located and having a mating interface with the anchoring device such that a seal is formed therewith.