Rail Fastening System

Abstract

A rail fastening system for fastening a rail on a subsurface, preferably a ballastless track, comprises at least one retaining element for mounting the rail on the subsurface. The retaining element has an angle guide plate that, in the assembled state, is configured to divert transverse forces from the rail into the subsurface and a shoulder part that, in the assembled state, is configured to butt together with the angle guide plate and to lie in a recess of the subsurface in a positive-locking manner.

Claims

1. A rail fastening system for fastening a rail on a subsurface, comprising a retaining element for mounting the rail on the subsurface, wherein the retaining element has an angle guide plate that, in an assembled state, is configured to divert transverse forces from the rail into the subsurface and a shoulder part that, in the assembled state, is configured to butt together with the angle guide plate and to lie in a recess of the subsurface in a positive-locking manner.

2. The rail fastening system according to claim 1, wherein the subsurface is a ballastless track.

3. The rail fastening system according to claim 1, wherein the shoulder part has a recess that is configured and dimensioned for flush support of the angle guide plate.

4. The rail fastening system according to claim 1, wherein the shoulder part has a recess that is configured and dimensioned for flush support of a projection on an underside of the angle guide plate.

5. The rail fastening system according to claim 1, wherein the shoulder part has an underside that is configured to rest on a bottom of the recess of the subsurface, and an outer side wall, which extends obliquely outwards from the underside at an angle and is configured to rest against a corresponding wall of the recess.

6. The rail fastening system according to claim 5, wherein the angle between the underside and the outer side wall is greater than 90 degrees.

7. The rail fastening system according to claim 5, wherein the angle between the underside and the outer side wall is between 12015 degrees.

8. The rail fastening system according to claim 5, wherein the shoulder part further has an inner side wall which extends obliquely inwards from the underside at an angle, such that the shoulder part has a trapezoidal cross-section.

9. The rail fastening system according to claim 1, further comprising a spacer plate for mounting between the rail and the subsurface.

10. The rail fastening system according to claim 1, further comprising a rail bearing plate that is configured to hold the rail, wherein, in the assembled state, the rail is in contact with the rail bearing plate, the rail is fastened on the rail bearing plate by a rail holder, and the angle guide plate butts together with an end face of the rail bearing plate.

11. The rail fastening system according to claim 10, further comprising at least one intermediate plate made of a flexible material, wherein, in the assembled state, the intermediate plate is arranged between the subsurface and the rail bearing plate.

12. The rail fastening system according to claim 11, wherein the flexible material has a dynamic stiffness of 200 kN/mm or less.

13. The rail fastening system according to claim 1, wherein the retaining element has a tensioning clamp that is configured to press the rail with a defined force onto the subsurface.

14. The rail fastening system according to claim 1, wherein the retaining element has a tensioning clamp that is configured to press the rail with a defined force onto the subsurface via the angled guide plate.

15. The rail fastening system according to claim 14, wherein the angle guide plate supports and determines a position and location of the tensioning clamp.

16. The rail fastening system according to claim 1, wherein the retaining element has a plug and a screw-shaped fastening element, the screw-shaped fastening element being anchored in the subsurface by the plug.

17. A railway track with a rail and at least one rail fastening system according to claim 1, wherein the rail is mounted on a subsurface by the rail fastening system.

18. A railway track with a rail, wherein the rail is mounted on a subsurface by two rail fastening systems as in claim 1 that are opposite each other in a transverse direction.

19. The railway track as in claim 17, wherein the rail is part of a switch.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. 1 is a cross-sectional view of a rail fastening system for a rail mounted on a ballastless track.

[0033] FIG. 2 is an enlargement of section A of FIG. 1.

DETAILED DESCRIPTION

[0034] In the following, preferred exemplary embodiments are described using the figures. Thereby, elements in the figures that are identical, are similar or have similar effects are marked with identical reference signs, and a repeated description of such elements is sometimes omitted in order to avoid redundancies.

[0035] The rail fastening system, presented in FIGS. 1 and 2, has a rail bearing plate 1, also designated as a slide chair plate, to support a rail 2 mounted on it. The rail bearing plate 1, for example, is a shaped part made of steel and, together with other components of the rail fastening system, serves to anchor the rail 2 securely to a subsurface 3, which is preferably a ballastless track made of concrete.

[0036] In the present exemplary embodiment, the rail 2 is located in the area of a switch. For this reason, FIG. 1 shows an additional rail section 2 at two positions. The rail section 2 rests on a corresponding section of the rail bearing plate 1 and is adjustable in the transverse direction (the left/right direction in the presentation in FIG. 1). It should be noted that the rail fastening system can also be used outside a switch, in normal track areas. The exact shaping of the rail bearing plate 1 can be adapted to the respective application environment and rail geometry.

[0037] The rail bearing plate 1 has a rail holding section la that determines the position of the rail 2 on the rail bearing plate 1 and contributes to the holding of the rail 2. The rail 2 is also braced against the rail bearing plate 1 by one or more rail tensioning clamps 1b and/or rail tensioning brackets 1c. The rail holding section 1a, the rail tensioning clamp 1b and the rail tensioning bracket 1c form an exemplary realization for a rail holding device that is configured to fasten the rail 2 to the rail bearing plate 1.

[0038] An intermediate plate 4, which is part of the rail fastening system made of a flexible material, can be arranged between the rail bearing plate 1 and the subsurface 3. The intermediate plate 4 is, for example, a highly elastic plate made of an elastomer and preferably has a dynamic stiffness of approximately 200 kN/mm or less. The intermediate plate 4 guarantees the optimum mounting of the rail bearing plate 1 and serves to decouple impact and sound between the rail 2 and the subsurface 3.

[0039] Furthermore, the rail fastening system has a spacer plate 5, also designated as the height compensation plate, which is preferably located under the intermediate plate 4 in order to compensate for any height tolerances of the subsurface 3. The spacer plate 5 can be made of metal or plastic.

[0040] The intermediate plate 4 and the spacer plate 5 may also be realized together by a single plate, in this case also designated as a spacer plate, in order to make it clear that such plate can have different thicknesses depending on the position of application, in order to compensate for any differences in the height of the subsurface 3, which arise in particular in the case of a ballastless track. Preferably, the height compensation through the spacer plate 5 is up to 20 mm.

[0041] The rail bearing plate 1 is fixed in its position on the subsurface 3 via two retaining elements 6. On each side in the transverse direction, one of the retaining elements 6 (more precisely, their angled guide plates 8 described below) is positioned flush in front of one end face of the rail bearing plate 1. The contacting end faces of the rail bearing plate 1 and the retaining elements 6 can have corresponding shapes (projections, recesses, etc.) in order to achieve a positive-locking connection. In this manner, the longitudinal migration of the rail bearing plate 1 is prevented. The retaining elements 6 and/or the rail bearing plate 1 can have other or additional means for a positive-locking and/or force-fitting connection to ensure that the rail bearing plate is securely held on the subsurface 3.

[0042] Each of the retaining elements 6 has a tensioning clamp 7 that engages over the ends of the rail bearing plate 1 and presses it against the subsurface 3 with a defined force. In this manner, the rail bearing plate 1 is held in the vertical direction. The tensioning clamps 7 are formed with an optimum tension force and a high vertical fatigue strength, wherein the exact shape, material thickness and spring constant can vary depending on the application.

[0043] Each of the retaining elements 6 also has an angle guide plate 8, each of the undersides of which has a projection 8a. The projection 8a or the shape of the underside of the angled guide plate 8 is designed in such a manner that, in the case of conventional installation, it would lie in the corresponding recess of the subsurface, for example on a railway tie with conventional corrugated geometry, in a positive-locking manner. The angled guide plates 8 serve the purpose of the defined guidance and support of the tensioning clamps 7, and are shaped in such a manner that the transverse wheel forces are diverted outwards into the subsurface 3.

[0044] Each of the angled guide plates 8 has a passage opening 8b, through which a corresponding fastening element 9 passes. In the present exemplary embodiment, the fastening element 9 is formed as a screw that is anchored in the subsurface 3 via a plug 10. All components of the rail fastening system are both braced against each other and anchored to the subsurface 3 by tightening the screw-shaped fastening element 9.

[0045] In this exemplary embodiment, the angled guide plate 8 is in direct contact with the rail bearing plate 1. Alternatively, the angled guide plate 8 can be inserted into a frame provided for this purpose (not shown), in order to, for example, be able to equip the rail fastening system in a modular manner with different types of angled guide plates 8.

[0046] In order to be able to divert the transverse wheel forces arising during operation securely into the subsurface 3 via the angled guide plates 8, even in the event of height compensation by a spacer plate 5, an intermediate plate 4 and the like, the rail fastening system also has two shoulder parts 11, which are positioned on each side in the transverse direction flush in front of a corresponding angled guide plate 8.

[0047] The shoulder parts 11 lie in a corresponding recess 3a of the subsurface 3 in a positive-locking manner. The shape of the recesses 3a, that is, the corrugated geometry, is generally different from that of a rail fastening system without height compensation, that is, in particular from that of a conventional tie.

[0048] Each of the shoulder parts 11, in turn, has a recess 11a, which is configured and dimensioned for the flush support of the angled guide plates 8. For this purpose, the recess 11a corresponds, for example, approximately to a conventional corrugated geometry, such that, in the assembled state, the projection 8a of the angled guide plate lies in the recess 11a in a positive-locking and/or force-fitting manner.

[0049] According to a special embodiment, the shoulder parts 11 have an underside 11b (see FIG. 2) that rests on the bottom of the recess 3a of the subsurface 3. Starting from the underside 11b, side walls 11c viewed in the transverse direction extend in a trapezoidal manner, that is, diagonally upwards. These are in surface contact with the corresponding walls of the recess 3a, thus achieving a form closure between the recess 3a and the shoulder part 11. The form closure, in particular the angle between the underside 11b and the outer side wall 11c, is selected in such a manner that the transverse force F (see FIG. 1), which is inclined slightly downwards, is securely dissipated to the subsurface 3 without the anchorage tending to come loose. Preferably, the transverse force F and the outer side wall 11c form an angle in the range of 45 to 90, particularly preferably essentially or near 90.

[0050] The shoulder part 11 thus functions as a modular extension of the rail fastening system, which allows the use of retaining elements 6 of conventional design and composition even in the case of height compensation as described herein. In particular, no additional fasteners using screws and plugs are required. For each rail 2, two retaining elements 6, whose fastening elements 9 simultaneously clamp and fasten the corresponding tensioning clamps 7, angled guide plates 8 and shoulder parts 11, are sufficient. Any component tolerances and manufacturing tolerances, in particular in the subsurface 3, can be easily compensated and are essentially balanced automatically during the process of bracing.

[0051] The rail fastening system presented herein is particularly suitable for installation on a ballastless track formed from concrete, wherein the plugs 10 are embedded in the concrete and can be removed and replaced at any time after installation without dismantling the rail bearing plate 1. Thus, all components can be replaced in an easy manner. It should be noted that the rail fastening system can also be used on conventional railway ties without a spacer plate 5 and/or an intermediate plate 4.

[0052] While the present invention has been described with reference to exemplary embodiments, it will be readily apparent to those skilled in the art that the invention is not limited to the disclosed or illustrated embodiments but, on the contrary, is intended to cover numerous other modifications, substitutions, variations and broad equivalent arrangements that are included within the spirit and scope of the following claims.

RAIL TENSIONING CLAMP

[0053] 1c Rail tensioning bracket

[0054] 2 Rail

[0055] 2 Rail section

[0056] 3 Subsurface

[0057] 3a Recess

[0058] 4 Intermediate plate

[0059] 5 Spacer plate

[0060] 6 Retaining element

[0061] 7 Tensioning clamp

[0062] 8 Angle guide plate

[0063] 8a Projection

[0064] 8b Passage opening

[0065] 9 Fastening element

[0066] 10 Plug

[0067] 11 Shoulder part

[0068] 11a Recess

[0069] 11b Underside

[0070] 11c Side wall

[0071] F Transverse force