AU2005328279B2

AU2005328279B2 - Oscillation absorber system

Info

Publication number: AU2005328279B2
Application number: AU2005328279A
Authority: AU
Inventors: Gunther Veit
Original assignee: Schrey & Veit GmbH
Current assignee: Schrey & Veit GmbH
Priority date: 2005-02-22
Filing date: 2005-12-30
Publication date: 2009-09-24
Anticipated expiration: 2025-12-30
Also published as: ES2297548T3; DE502005001885D1; PT1693516E; DK1693516T3; KR101250595B1; AU2005328279A1; ATE377671T1; WO2006089585A1; EP1693516B1; KR20070113250A; EP1693516A1

Abstract

Oscillation absorber assembly has ribbed plate (8a) with two essentially parallel ribs (10a) which are attached underneath rail base (7) in such a manner that a rib is arranged on both sides of rail (5). First clamping device (4a) is an angle plate with its first and second region (41,42) bent from it and first oscillation absorber (2) is attachable on second region.

Description

WO 2006/089585 - 1 - PCT/EP2005/014149 Oscillation absorber arrangement PRIOR ART 5 The present invention relates to an oscillation absorber arrangement for fitting at least one oscillation absorber to a rail, as claimed in the precharacterizing clause of claim 1, and as known from DE 299 09 351 Ul. 10 An oscillation absorber arrangement by means of which a first oscillation absorber can be fitted to a rail foot and a second oscillation absorber can be fitted to a rail web is known from German Utility Model 15 DE 297 14 904 U1. DE 31 13 268 C2 discloses an oscillation absorber which is suitable for this purpose, for structure-borne sound absorption, having a waveguide in the form of a horn 20 part which tapers in the wave propagation direction, can be connected at at least the broad end with a force fit to a body to be damped, and has a damping material at least in the area of the narrower end. The waveguide has a layer sequence, which alternates in the wave 25 propagation direction, of flexible spring elements and solid mass elements, with the spring constant of the spring elements and the masses of the mass elements decreasing continuously from the broader end of the waveguide. 30 Figure 4 shows a schematic side view parallel to the rail of the oscillation absorber arrangement known from German Utility Model DE 297 14 904 Ul. 35 The system is used to absorb oscillations in particular on iron rails or tramway rails. The structure-borne sound originating from the rail and the airborne sound WO 2006/089585 - 2 - PCT/EP2005/014149 caused by the rail are intended to be reduced in this way. An oscillation absorber 1 is attached with a force fit 5 underneath the rail foot 7 in order to damp vertical oscillations. This is attached to a solid metal plate 8', to which the individual spring mass systems, which are in the form of a waveguide tapering in the wave propagation direction, are fitted. The metal plate 8' 10 is connected to the rail foot 7 by means of a supporting bracket 3'. A further oscillation absorber 2 is clamped against the rail web 6 with clamping and/or spring elements 4' in 15 order to damp horizontal oscillations in the rail head 5 and web 6. The base plate 9' which, like the first oscillation absorber 1, comprises a solid metal plate, results in 20 very good oscillation coupling to the rail by virtue of this type of fitment, that is to say the oscillations to be absorbed are introduced directly into the absorber system because of the very stiff connection. Uneven areas on the rail have no effects on the 25 effectiveness of the absorber, because of the solid construction of the absorber base plates. This known oscillation absorber arrangement has the disadvantage that it involves a certain amount of 30 installation complexity and that large lateral forces are exerted on the attachment screws which connect the clamping brackets 3' to the base plate 8'. Figure 5 shows a schematic side view parallel to the 35 rail of the oscillation absorber arrangement known from German Utility Model DE 299 09 351 U1.

WO 2006/089585 - 3 - PCT/EP2005/014149 The oscillation absorber arrangement shown in Figure 5 has a rib plate 8 which is arranged underneath the rail foot 7 such that its two ribs 10 are arranged essentially parallel on both sides of the rail. An 5 oscillation absorber 1 is arranged transversely with respect to the rail, underneath the rib plate 8. Supporting brackets 3 are fitted to each of the two ribs 10 by means of threaded bolts 12, which are anchored in the ribs 10, and corresponding threaded 10 nuts 11. The right-hand supporting bracket 3 shown in Figure 5 is supported directly on the rail foot 7. The left-hand supporting bracket 3 illustrated in Figure 5 is 15 supported at a first end of a clamping bracket 4, whose second end presses a further oscillation absorber 2 against the rail web 6. The first end of the clamping bracket 4 is supported on the rail located underneath this. In this case, the oscillation absorber 2 is 20 mounted on a base plate 9, for example by being screwed to it, and the clamping bracket 4 presses against this base plate 9. Figure 6 shows a schematic side view at right angles to 25 the rail of the oscillation absorber arrangement known from German Utility Model DE 299 09 351 Ul. As can be seen from Figure 6, the clamping bracket 4 is bent and spread open in a y-shape, with the two ends 30 that have been spread open pressing against the outer ends of the base plate 9, and with the oscillation absorber 2 being arranged between these spread-open ends of the clamping bracket 4. 35 This known oscillation absorber arrangement has the disadvantage that the clamping bracket 4 can slide or break after being loaded for a relatively long time.

WO 2006/089585 - 4 - PCT/EP2005/014149 The present invention is therefore based on the object of providing a better oscillation absorber arrangement which can be fitted and removed easily and is more robust during operation. 5 ADVANTAGES OF THE INVENTION The idea on which the present invention is based is that the first clamping device is an angled plate with 10 the first area and the second area angled from it, and the first oscillation absorber can be fitted to the second area. This means that there is no need for the base plate for the oscillation absorber, allowing a compact and more robust structure to be achieved, with 15 the oscillation absorber offering very effective damping since it is separated from the rail web only by the second area of the clamping device. The flat configuration of the clamping device improves the robustness and prevents upward sliding. 20 Furthermore, the oscillation absorber arrangement according to the invention and having the features of claim 1 can be fitted and removed very easily. Particularly where rib plates are used, all that is 25 necessary is to detach the supporting bracket attachment screw and to clamp in the clamping bracket under the supporting bracket. The oscillation absorber arrangement according to the invention can in this case be manufactured at a lower cost as a result of the use 30 of rib plates, which are normally used in any case for mounting rails on wooden sleepers. The use of this type of installation likewise has the advantage that this attachment has already been used 35 for a very long time for railroads, and the corresponding installation tools are generally available. The abovementioned advantages lead to much faster assembly. Trials have shown that the new WO 2006/089585 - 5 - PCT/EP2005/014149 absorbers can be installed more quickly than the known absorbers, because of their compactness. The robustness of the clamping connection means that 5 the lateral forces on the attachment screws are reduced. In conjunction with the stiff rib plate, this leads to a much greater clamping force of the absorber on the rail. This improves the effect of the absorber even more. The lateral installation of the foot 10 absorber makes it possible to fit the rail absorbers even if the sleeper separation is very small. Advantageous developments and improvements of the invention can be found in the dependent claims. 15 According to one preferred development, the first oscillation absorber can be screwed into the second area from the side facing away from the rail web. 20 According to a further preferred development, the outside of the ribs bounds the rib plate in a U-shape, and their inside rests on the rail foot. According to a further preferred development, the first 25 and the second supporting profile are L-shaped, with one L-limb running flush with the outside of the ribs, and in which the other L-limb can be pressed onto the first area. 30 According to a further preferred development, a second oscillation absorber can be fitted on the lower face of the rib plate. According to a further preferred development, the 35 second oscillation absorber is narrower than the rib plate.

WO 2006/089585 - 6 - PCT/EP2005/014149 According to a further preferred development, a second clamping device is provided, can be clamped in at a first end between the other of the two supporting profiles and the rail foot, and can be arranged such 5 that, at a second end, it presses against the rail web, and in that a third oscillation absorber can be fitted to the side of the second clamping device facing away from the rail web. 10 According to a further preferred development, the first area and the first supporting profile have an engagement device which counteracts sliding of the first clamping device, at least in the direction of the rail head. This considerably increases the robustness. 15 According to a further preferred development, the engagement device has a bolt in the first supporting profile and a hole in the first area, which can be engaged with one another. 20 According to a further preferred development, one rib has a cutout into which a threaded-bolt head of a threaded bolt can be inserted, by means of which the first supporting profile can be fitted to that one of 25 the two ribs. DRAWINGS Exemplary embodiments of the invention will be 30 explained in more detail in the following description, and are illustrated in the drawings, in which: Figure 1 shows a schematic side view parallel to the rail of one embodiment of the oscillation 35 absorber arrangement according to the invention; WO 2006/089585 - 7 - PCT/EP2005/014149 Figure 2 shows a schematic side view at right angles to the rail of the embodiment of the oscillation absorber arrangement according to the invention; 5 Figure 3 shows a schematic view from above of the embodiment of the oscillation absorber arrangement according to the invention, as shown in figures 1 and 2, in comparison with 10 two known oscillation absorber arrangements; Figure 4 shows a schematic side view parallel to the rail of a known oscillation absorber arrangement; 15 Figure 5 shows a schematic side view parallel to the rail of the oscillation absorber arrangement known from German Utility Model DE 299 09 351 Ul; and 20 Figure 6 shows a schematic side view at right angles to the rail of the oscillation absorber arrangement known from German Utility Model DE 299 09 351 Ul. 25 DESCRIPTION OF THE EXEMPLARY EMBODIMENTS Identical reference symbols in the figures denote identical or functionally identical elements. 30 Figure 1 shows a schematic side view parallel to the rail of one embodiment of the oscillation absorber arrangement according to the invention. 35 In Figure 1, reference symbol 5 denotes a rail head, 6 denotes a rail web and 7 denotes a rail foot. An oscillation absorber 1 is mounted with a force fit underneath the rail foot 7, in order to damp vertical WO 2006/089585 - 8 - PCT/EP2005/014149 oscillations, and is screwed to a rib plate 8a from the underneath by means of attachment screws 21a. The width of the oscillation absorber 1 is designed such that it does not project beyond the ribs 10a of the rib plate 8 5 at the side. The rib plate Ba has a U-shaped cross section which is bounded by ribs 10a which surround the rail foot 7, resting on it. The rib plate 8a is mounted on the rail 10 foot by means of two L-shaped supporting profiles 3a. The L-shaped supporting profiles 3a are attached to the rib plate 8a by means of a threaded nut 11 and a threaded bolt 12. A spring washer 13 is located between the threaded nut 11 and the respective L-shaped 15 supporting profile. A clamping device 4a in the form of an angled plate is in each case clamped in between the rail foot 7 and the respective L-shaped supporting profile 3a. Each angled 20 plate 4a has a first flat trapezoidal area 41 and a second flat rectangular area 42, with the first area 41 being pressed against the rail foot 7, and with the second area 42 being pressed against the rail web 6. 25 Oscillation absorbers 2 are screwed from the outside onto the respective second area 42, with the attachment screws 20 ending in threaded holes 20a in the area 42. The L-shaped supporting profiles 3a run on the outside 30 flush with the ribs 10a of the rib plate 8. This makes it possible to advantageously reduce shear stresses which occur in the design shown in Figure 5, where the supporting profile 3 is U-shaped and is likewise supported on the outside of the ribs 10, on the rib 35 plate 10 there. In order to prevent the clamping device 4 in the form of an angled plate from sliding upwards in the WO 2006/089585 - 9 - PCT/EP2005/014149 direction of the rail head, the angled plate has a hole 16 in which a bolt 15 is guided, which is provided in the L-shaped supporting profile 3a. 5 Direct fitting of the oscillation absorbers 2 by means of the threaded bolts 20 on the angled plate 4a allows compact fitting and more effective oscillation damping than in the known case shown in Figure 6, where the clamping device 4 was in the form of a Y-shaped 10 bracket, where the Y ends are screwed to the base plate of an oscillation absorber. In the design according to the embodiment, the oscillation absorbers 2 rest on the rail web 6 over 15 virtually their entire length, and thus offer optimum damping. Figure 2 shows a schematic side view at right angles to the rail of the embodiment of the oscillation absorber 20 arrangement according to the invention. As can be seen in Figure 2, the rib 10a of the rib plate 8a has a cutout 19a in which a threaded-bolt head 19 of the threaded bolt 12 is inserted, as a result of 25 which the supporting profile 3a can easily be fitted to the rib plate 8a. Overall, the embodiment of the oscillation absorber arrangement according to the invention offers 30 considerably greater compactness than the previously known solutions. This is advantageous in particular for maintenance of the rails and of the track bed. Figure 3 shows a schematic view from above of the 35 embodiment of the oscillation absorber arrangement according to the invention as shown in figures 1 and 2, in comparison with two known oscillation absorber arrangements.

WO 2006/089585 - 10 - PCT/EP2005/014149 In Figure 3, reference A schematically denotes the known oscillation absorber arrangement as shown in Figure 4, in the fitted state. In this case, 21, 22, 23 5 denote attachment points. In the known oscillation absorber arrangement, two clamping springs 4' were required and were attached to the points 21 and 22, as well as a screw connection on the opposite side, corresponding to the attachment point 23. Furthermore, 10 the known oscillation absorber arrangement as shown in Figure 4 required a large amount of space in the rail direction, since the base plate 8' had to be of such a length that the two attachment points 21 and 22 lay on it. 15 In contrast to this, the oscillation absorber arrangement, which is denoted N, according to DE 299 09 351 U1, as described above, can be arranged in a transverse format with respect to the rail. This 20 is feasible because the clamping bracket 4 is spread open, so that only one attachment point 31 is required to anchor the clamping bracket 4. The further attachment point 32 corresponds to the known attachment point 23. It is therefore possible with this 25 arrangement to arrange two web absorbers with only two attachment points. Furthermore, it is even possible to use narrower rail compartments for fitting the oscillation absorbers. 30 The oscillation absorber arrangement annotated N' according to the embodiment described above can also be arranged in a transverse format with respect to the rail, and is consequently considerably narrower and more compact. This is because only one attachment point 35 31 is once again required for anchoring the clamping profile 3a for the clamping plate 4a, and the clamping profile 3a as well as the rib plate 8a are smaller than the clamping bracket 4.

WO 2006/089585 - 11 - PCT/EP2005/014149 Overall, the present invention results in a considerable simplification in terms of fitting and accommodating oscillation absorber arrangements for 5 rails. Although the present invention has been described above with reference to one preferred exemplary embodiment, it is not restricted to this but can be modified in 10 many ways. In particular, the clamping brackets, supporting brackets and the oscillation absorber may have a different geometry. 15 Although, in the above embodiment, the oscillation absorber 2 projected slightly beyond the side ends of the second area 42 of the angled plate 4a at its ends, it is, of course, also possible for the oscillation 20 absorber 2 to rest completely in place on this area. Furthermore, the first area 41 of the angled plate 4a need not necessarily assume the illustrated trapezoidal shape, but may also have a rounded or some other 25 polygonal shape. Although in the above example the engagement device has a bolt in the first supporting profile and a hole in the first area, which can be engaged with one another, 30 the invention is not restricted to this. Any required raised areas and recessed areas on the clamping profile and supporting profile are feasible which can engage with one another in order to provide the desired robustness. 35 WO 2006/089585 - 12 - PCT/EP2005/014149 Oscillation absorber arrangement LIST OF REFERENCE SYMBOLS: 1, 2 Oscillation absorber 3, 3' Supporting bracket 3a Supporting profile 4, 4' Clamping bracket 4a Clamping device, angled plate 5 Rail head 6 Rail web 7 Rail foot 8, 8a Rib plate 9 Base plate 10, 10a Rib 11 Threaded nut 12 Threaded bolt 21,22,23,31,32 Attachment points A Old arrangement N New arrangement 20, 21a Attachment screws 20a Threaded hole 13 Washer 15 Bolt 16 Hole 41, 42 First, second area 19 Threaded-bolt head 19a Cutout

Claims

2. The oscillation absorber arrangement as claimed in 5 claim 1, characterized in that the first oscillation absorber (2) can be screwed into the second area (42) from the side facing away from the rail web (6).
3. The oscillation absorber arrangement as claimed in 10 claim 1 or 2, characterized in that the outside of the ribs (10a) bounds the rib plate (10) in a U-shape, and their inside rests on the rail foot (7).
4. The oscillation absorber arrangement as claimed in 15 one of the preceding claims, characterized in that the first and the second supporting profile (3a) are L-shaped, with one L-limb running flush with the outside of the ribs, and in which the other L-limb can be pressed onto the first area (41). 20
5. The oscillation absorber arrangement as claimed in one of the preceding claims, characterized in that a second oscillation absorber (1) can be fitted on the lower face of the rib plate (8a). 25
6. The oscillation absorber arrangement as claimed in claim 5, characterized in that the second oscillation absorber (1) is narrower than the rib plate (8a). 30 7. The oscillation absorber arrangement as claimed in one of the preceding claims, characterized in that a second clamping device (4a) is provided, can be clamped in at a first end between the other of the two supporting profiles (3a) and the rail foot (7), and can 35 be arranged such that, at a second end, it presses against the rail web (6), and in that a third oscillation absorber (2) can be fitted to the side of WO 2006/089585 - 15 - PCT/EP2005/014149 the second clamping device (4a) facing away from the rail web (6).
8. The oscillation absorber arrangement as claimed in 5 one of the preceding claims, characterized in that the first area (41) and the first supporting profile (3a) have an engagement device (15, 16) which counteracts sliding of the first clamping device (4a) , at least in the direction of the rail head (5). 10
9. The oscillation absorber arrangement as claimed in claim 8, characterized in that the engagement device (15, 16) has a bolt (15) in the first supporting profile (3a) and a hole (16) in the first area (41) 15 which can be engaged with one another.
10. The oscillation absorber arrangement as claimed in one of the preceding claims, characterized in that one rib (10a) has a cutout (19a) into which a threaded-bolt 20 head (19) of a threaded bolt (12) can be inserted, by means of which the first supporting profile (3a) can be fitted to that one of the two ribs (10a).