Rail fastening arrangement and shim for such a rail fastening arrangement

Abstract

A rail fastening arrangement in which a rail for a rail vehicle is fastened to a base, and to a shim. The rail fastening arrangement includes two guide plates, of which one guide plate respectively is associated with one of the longitudinal sides of the rail, and a shim which is arranged between the base and the rail. The shim, at its top, has a contact area on which the rail is supported, and, at its bottom, has a supporting surface by way of which the shim is supported on the base. The contact area and the supporting surface of the shim, viewed in a section located transversely to the longitudinal extension of the rail, enclose an acute angle. The edge at which the shim is thinner is arranged beneath the rail, fastening of rails oriented at a cant relative to the vertical in the region of points.

Claims

1. A rail fastening arrangement in which a rail for a rail vehicle is fastened to a base, comprising two guide plates, of which one guide plate respectively is associated with one of the longitudinal sides of the rail, and a shim which is arranged between the base and the rail, wherein the shim, at a top side associated with the rail, has a contact area on which the rail is supported, and, at a bottom side associated with the base, has a supporting surface by way of which the shim is supported on the base, and wherein the contact area and the supporting surface of the shim, viewed in a section located transversely to a longitudinal extension of the rail, enclose an acute angle, so, at a first edge associated with one longitudinal side of the rail, the shim is thinner than in a region associated with the other longitudinal side of the rail, wherein the first edge, at which the shim is thinner, is arranged beneath the rail, wherein, with its thicker region associated with the other longitudinal side of the rail, the shim projects laterally beyond the rail, and wherein, at the top side of the shim in the region of the shim projecting laterally beyond the associated longitudinal side, a recess is formed which is oriented parallel to the longitudinal extension of the rail, in which recess an angled section sits with interlocking fit, the section being formed onto a bottom side of the guide plate associated with the shim, wherein constructed on the bottom side of the shim is a projection with which the shim catches with interlocking fit in a recess formed in the base.

2. The rail fastening arrangement according to claim 1, wherein the first edge, at which the shim is thinner, is oriented flush with the longitudinal side of the rail associated with the first edge.

3. The rail fastening arrangement according to claim 1, wherein with the first edge, at which the shim is thinner, the shim abuts against the guide plate associated with the respective longitudinal side.

4. The rail fastening arrangement according to claim 1, wherein the contact area extends as far as the region projecting laterally beyond the associated longitudinal side of the rail.

5. The rail fastening arrangement according to claim 1, wherein the recess on the top side and the projection on the bottom side of the shim are arranged one above the other.

6. The rail fastening arrangement according to claim 1, wherein formed in the region of the shim projecting laterally beyond the rail, is a through-opening, leading from the top side of the shim to the bottom side of the shim, which is oriented so as to align with a correspondingly arranged through-opening in the guide plate, and in that a fixing element is led through the mutually aligned through-openings, and this catches in the base to fix a spring element supported on the guide plate.

7. The rail fastening arrangement according to claim 1, wherein a resilient intermediate layer is arranged between the shim and the rail.

8. The rail fastening arrangement according to claim 7, wherein, on an end-face contact surface associated with the rail, at least one of the guide plates has a projection in the form of a strip with which the projection catches under the longitudinal side of the rail with which the projection is associated.

9. The rail fastening arrangement according to claim 1, wherein the contact area and the supporting surface of the shim and a top of the base are each constructed so as to be flat.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will be explained in more detail below with reference to drawings illustrating an embodiment. Schematically in each case:

(2) FIG. 1 shows a first fastening point for a rail in a section transverse to the longitudinal extension of the rail;

(3) FIG. 2 shows a plan view of a shim used in the fastening point according to FIG. 1;

(4) FIG. 3 shows a side view of the shim according to FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

(5) Fastened in the rail fastening point B illustrated in FIG. 1 is a rail S which conventionally comprises a rail head 1, on whose top a running surface 2 for a rail wheel (not seen here) of a rail vehicle (likewise not shown), a rail web 3 supporting the rail head 1 and a rail foot 4 on which the rail web 3 is centrally arranged. The rail foot 4 is wider than the rail head 1 and has a flat supporting surface 5 at its bottom.

(6) The rail fastening point B has a base 6, which in the present example is formed by a sleeper of the conventional type and cast in concrete. At its top the base 6 has a flat contact area 7 which extends over the length of the base 6 measured in the longitudinal direction L of the base oriented transversely to the rail S.

(7) Formed in the contact area 7 at a spacing from each other are two groove-like recesses 8, 9 which extend parallel to each other and parallel to the longitudinal extension of the rail S. The recesses 8, 9 have an approximately trapezoidal cross-section which widens toward the contact area 7 of the base 6.

(8) Furthermore, two plastics material dowels 10, 11 are let into the base in the region delimited by the recesses 8, 9. The recesses 8, 9 and the plastics material dowels 10, 11 are each arranged at the same distance and symmetrically to the longitudinal axis of the rail S.

(9) A shim 12 produced from a plastics material, in particular from a fibre-reinforced plastics material, rests on the base 6. The shim 12 has a top 13, associated with the rail S, on which a flat supporting surface 14 is constructed.

(10) Resting on the supporting surface 14 is a plate-like intermediate layer 15 which is composed of an elastic material with defined resilience. The intermediate layer 15 covers the rail foot 4 over its width B4 and extends over the width B14 of the supporting surface 14 of the shim 12. The rail S rests on the flat side of the intermediate layer 15 with which it is associated, so the rail S is supported by the intermediate layer 15 on the supporting surface 14 of the shim 12.

(11) At its bottom 16 associated with the base 6 the shim 12 has a likewise flat supporting surface 17 with which is rests on the base 6. Viewed from the side the contact area 14 is oriented so as to be canted with respect to the supporting surface 17, so the contact area 14 and the supporting surface 17 enclose an acute angle . The contact area 14 and the supporting surface 17 meet at the narrow side 18 of the shim 12 at which a correspondingly thinner edge 19 of minimised thickness D1 is formed. The shim 12 is accordingly thinner at the narrow side 18 associated with the edge 19 than in the region of its opposing narrow side 20, delimiting the contact area 14, in whose region the thickness D2 of the shim is considerably greater than the thickness D1.

(12) The length of the contact area 14 of the shim 12 is dimensioned such that its end region associated with the narrow side 18 is located in the region of a longitudinal edge L1 of the rail foot 4, while the opposing end region of the contact area 14 is positioned close to the other longitudinal edge L2 of the rail foot 4 when the fastening point B is completely assembled.

(13) The shim 12 is extended beyond the end region of the contact area 14, associated with the longitudinal edge L2, in which it has the greatest thickness D2, by a region 21 at which a flat contact area 22 oriented parallel to contact area 17 is provided for a guide plate 23 conventionally constructed as an angled guide plate.

(14) Formed in the contact area 22 is a groove-shaped recess 24 which extends parallel to the narrow side 18 and, when the fastening point is completely assembled, is accordingly oriented parallel to the rail S and transversely to the longitudinal direction of the shim 12, which in plan view has a rectangular, elongated shape. The shape of the recess 24 is adapted to an angled section 25 of the guide plate 23 projecting in the direction of the base 6 such that, when the fastening point B is completely assembled, the angled section 25 sits in the recess 24 with interlocking fit. At the same time the shim 12 is curved downwards in the region of the recess 24, so a projection 26 is also formed there. Its external shape is adapted to the shape of the associated recess 8 formed in the base 6 in such a way that, when the fastening point B is completely assembled, the projection 26 is held in the recess 8 with interlocking fit.

(15) Arranged on the conventionally shaped guide plate 23, which sits on region 21 of the shim 12 laterally projecting beyond the associated longitudinal edge L2 of the rail S, is a spring element 27 constructed as a conventional W-shaped rail clip which, in a manner known per se, exerts a resilient retaining force on the rail foot 4 with the free ends of its retaining arms.

(16) Formed on the guide plate 23 in the region of the edge between its contact surface adjoining the longitudinal edge L2 of the rail foot 4 in the assembled position and its bottom is a strip-like projection 28 which, when the guide plate 23 is completely assembled, catches under the longitudinal edge L2 of the rail foot 4 with which it is associated and in the process abuts against the edge of the intermediate layer 15 with which it is associated. The projection 28 which catches under the rail foot 4 reliably prevents the guide plate 23 from tilting about a tilt axis running through the recess 24 and consequently lifting up from the shim 12 in the case of high loads.

(17) A fixing element 29 constructed as a conventional sleeper screw is provided to fix the spring element 27 arranged on the guide plate 23. The fixing element 29 is led through the middle loop in the spring element 27, a through-opening 30 in the guide plate 23, formed in the guide plate 23 and leading from the top thereof to its bottom, and a through-opening 31 in the shim 12 arranged so as to be aligned with through-opening 30, and screwed into the associated dowel 10 let into the base 6. The middle loop of the spring element 27 is thus pulled in the direction of the base 6 by way of the head of the fixing element 29 and the spring element 27 is twisted as a whole such that the required retaining force is exerted on the rail foot 4.

(18) A guide plate 32 is also arranged on the side of the rail S associated with the other longitudinal edge L1. The guide plate 32 is shaped and dimensioned in exactly the same way as guide plate 23. In contrast to guide plate 23, however, guide plate 32 sits directly on the contact area 7 of the base 6 and catches with its angled section 33 in the recess 9 in the base 6 associated with this side. The angled section 33 and the recess 9 are likewise adapted to each other such that, when the fastening point B is completely assembled, the angled section 33 is held in the recess 9 with interlocking fit.

(19) With its strip-like projection 34 associated with the rail foot the guide plate 32 catches under the longitudinal edge L1 of the rail S with which it is associated and abuts against the thin narrow side 18 of the shim 12 on the one hand and against the edge of the resilient intermediate layer 15 with which it is associated on the other hand. At the side associated with the bottom of the guide plate 32 the strip-like projection 34 has a recess whose shape and size are chosen such that, when fastening point B is completely assembled, the projection 34 sits above a narrow covering region 35 on the end region of the contact area 14 associated with the narrow side 18. Lifting or tilting of the shim 12 is likewise reliably prevented in this way.

(20) Also arranged on the guide plate 32 is a spring element 36 constructed as a conventional W-shaped rail clip, and with the free ends of its retaining arms this exerts a resilient retaining force on the side of the rail foot 4 with which it is associated. A conventional sleeper screw 37 is also provided here to fix the spring element 36 arranged on the guide plate 32. The sleeper screw 37 is led through the middle loop of the spring element 36 and through the through-opening in the guide plate 32 and screwed into the associated dowel 11 let into the base 6, so the middle loop of the spring element 36 is pulled in the direction of the base 6 and the spring element 36 as a whole is twisted such that the required retaining force is exerted on the rail foot 4.

(21) As a consequence of the orientation, which is canted in relation to the supporting surface 17, of the contact area 14 of the shim 12 the rail S is arranged so as to be canted by an angle with respect to the vertical V, and this corresponds to the acute angle enclosed between the supporting surface 17 and the contact area 14 of the shim 12.

LIST OR REFERENCE NUMERALS

(22) 1 rail head 2 running surface of the rail head 1 3 rail web 4 rail foot 5 supporting surface of the rail foot 4 6 base 7 contact area 8,9 recesses in the base 6 10,11 plastics material dowel 12 shim 13 top of the shim 12 14 flat contact area of the shim 12 15 intermediate layer made from a resilient material 16 bottom of the shim 12 17 supporting surface of the shim 12 18 thin narrow side of the shim 12 19 thin edge of the shim 12 20 thick narrow side of the shim 12 21 extended region of the shim 12 22 contact area of region 21 of the shim 12 23 guide plate 24 recess in the shim 12 25 angled section of the guide plate 23 26 downwardly protruding projection of the guide plate 23 27 spring element 28 strip-like projection of the guide plate 29 fixing element 30 through-opening in the guide plate 23 31 through-opening in the shim 12 32 guide plate 33 angled section of the guide plate 32 34 strip-like projection of the guide plate 32 35 overlapping region 36 spring element 37 sleeper screw angle enclosed by the supporting surface 12 and contact area 17 B rail fastening point B4 width of the rail foot 14 B14 width of the supporting surface 14 of the shim 12 D1 thickness of the thin edge 19 D2 thickness of the thick narrow side 20 L longitudinal direction of the base 6 L1,L2 longitudinal edge of the rail S S rail V vertical line