Device for transmitting longitudinal forces on rail vehicles

Abstract

The invention relates to a device for transmitting longitudinal forces from a bogie (DG) of a rail vehicle to a load-bearing structure (TS). The bogie (DG) is connected to the load-bearing structure (TS) by two traction elements (FE1), which transmit the longitudinal forces formed by the two movement directions of the rail vehicle as traction forces from the bogie (DG) to the load-bearing structure (TS). Viewed in the travel direction of the rail vehicle, the two traction elements (FE1) are arranged opposite one another. According to the invention, the traction elements (FE1) are designed as fiber elements (FE1). Here, the fiber elements (FE1) are made of highly loaded fibers and are designed to transmit only traction forces.

Description

[0001] The present invention relates to a device for transmitting longitudinal forces from a bogie of a rail vehicle to a load-bearing structure.

[0002] In a rail vehicle, the transmission of longitudinal forces, such as tractive forces and braking forces, from the bogie to the load-bearing structure must be given high importance. As the load-bearing structure, for example, a locomotive body or a car body can be used.

[0003] There are several solutions for the above-mentioned transmission of longitudinal forces, and some of them are listed and described representatively:

[0004] Longitudinal force transmission via a pivot: The pivot connects the bogie to the car body. The bogie moves relative to the car body about a vertical axis formed by the pivot pin. The transmission of longitudinal forces between the car body and the bogie is achieved through the pivot pin.

[0005] Longitudinal force transmission by means of a tie rod / compression rod: In this design, the transmission of longitudinal forces from the bogie to the car body is carried out by a tie rod / compression rod, which acts on the head carrier of the bogie frame in a wear-free and supported manner. The tie rod / compression rod consists of two support members, which are connected to a pipe fitting. Due to the required force transmission, the tie rod / compression rod is implemented very robustly and has a large mass. Thus, a large installation volume is required in the area of the bogie.

[0006] Longitudinal force transmission by means of two tie rods: In this design, the transmission of longitudinal forces from the bogie to the car body is achieved by two tie rods. They are fixed in the area of the opposite ends of the bogie. By using two tie rods, the distribution of the longitudinal forces is achieved, so that the longitudinal forces do not have to be implemented as robustly as compared to a single tie rod / compression rod. However, due to the use of two tie rods, a correspondingly larger installation volume is required compared to a single tie rod / compression rod.

[0007] The choice of the longitudinal force transmission solution is determined by structural boundary conditions and constraints. This especially applies to the case of longitudinal force transmission in a driven bogie, in which high longitudinal forces (driving force or braking force) are transmitted due to the drive.

[0008] In a driven bogie, the axle of the working wheels is driven, for example, by an electric running motor installed in the bogie.

[0009] Figure 3 Such a bogie DG according to the prior art with two tie rods ZST1, ZST2 is shown.

[0010] The two tie rods ZST1, ZST2 are provided with elastomeric bearings ELL via connection points on the bogie or on the locomotive / car body, and the elastomeric bearings enable relative movement of the connecting components relative to each other.

[0011] The elastomeric bearing ELL mentioned additionally requires a relatively large mounting cavity at the connection point, making its integration not easily achievable.

[0012] The described structural principle with two tie rods requires corresponding connection brackets to be provided on the locomotive / car body. Preferably, when observed in the transverse direction relative to the locomotive / car body, the connection brackets are arranged in the middle region of the cross beam of the locomotive / car body.

[0013] The common structure of the locomotive / car body has two eccentrically extending longitudinal beams, which absorb or transfer longitudinal forces in the locomotive / car body through cross beams (not shown here).

[0014] The cross beam is subjected to bending loads due to the introduced longitudinal forces and must be implemented correspondingly firmly.

[0015] The installation volume and weight must be considered in the design and dimensioning of the rail vehicle.

[0016] Other examples of the prior art for the above-mentioned force transmission are known from documents BE 666141A and CN 105065429A.

[0017] Therefore, the technical problem to be solved by the present invention is to provide a device for transmitting longitudinal forces from the bogie of a rail vehicle to the load-bearing structure, which is optimized in terms of weight and structural space.

[0018] This technical problem is solved by the features of claim 1.

[0019] Advantageous improvements are given in the dependent claims.

[0020] The present invention relates to a device for transmitting longitudinal forces from the bogie of a rail vehicle to the load-bearing structure.

[0021] The bogie is connected to the load-bearing structure by two traction elements, which transmit the longitudinal forces formed by the two movement directions of the rail vehicle as traction forces from the bogie to the load-bearing structure. When observed in the traveling direction of the rail vehicle, the two traction elements are arranged opposite to each other.

[0022] According to the present invention, the traction elements are configured as fiber elements. Here, the fiber elements are made of high-load fibers and are configured to transmit only traction forces.

[0023] Therefore, according to the present invention, the two tie rods described in Figure 3 and made of metal are replaced by fiber elements or ropes.

[0024] According to the present invention, the bogie has two opposite ends, wherein each end is connected to the load-bearing structure by a traction element.

[0025] In an advantageous refinement, the load-bearing structure has two longitudinally extending girders which are interconnected at intervals by cross-members.

[0026] In an advantageous refinement, the bogie (DG) is configured as a driven bogie (DG). The fibre element is configured such that the braking force or tractive force generated by the drive means of the bogie is transmitted as a longitudinal force from the bogie via the fibre element to the load-bearing structure.

[0027] In an advantageous refinement, the first end of the fibre element is connected to the bogie or to the end of the bogie by a connection point. The second end of the fibre element is connected to the centre of the cross-member of the load-bearing structure or to the load-bearing structure by a connection point.

[0028] According to the invention, the first end of the fibre element is connected to the end of the bogie by a connection point. The fibre element comprises further fibre elements and additionally has a distribution element which is implemented, for example, as a ring. Starting from the distribution element or the ring, the fibre element divides into a plurality of further fibre elements.

[0029] As a further fibre element, the first fibre element is connected not only to the first longitudinal girder but also to the cross-member of the load-bearing structure, and as a further fibre element, the second fibre element is connected not only to the second longitudinal girder but also to the cross-member of the load-bearing structure. Here, the first longitudinal girder is preferably arranged parallel to the second longitudinal girder, and the two longitudinal girders are connected to one another by cross-members.

[0030] In a preferred refinement, the first fibre element is connected to the load-bearing structure at a first point at which the cross-member is connected to the first longitudinal girder, or the first fibre element is connected in the vicinity of the first point. Thus, a longitudinal force is directly introduced into the load-bearing structure or into its first longitudinal girder.

[0031] In a preferred refinement, the second fibre element is connected to the load-bearing structure at a second point at which the cross-member is connected to the second longitudinal girder, or the second fibre element is connected in the vicinity of the second point. Thus, a longitudinal force is directly introduced into the load-bearing structure or into its second longitudinal girder.

[0032] In an advantageous refinement, the second end of the fibre element is connected to the cross-member centrally.

[0033] In an advantageous refinement, one fibre element or a plurality of further fibre elements are made of high-strength fibres, preferably made of Kevlar fibres and / or made of carbon fibres.

[0034] In an advantageous refinement, the further division of the additional fiber elements is effected by additional dividing elements or rings which, after the further division has been completed, are connected to the load-bearing structure by distributed connection points.

[0035] In an advantageous refinement, the load-bearing structure is part of a frame or a locomotive body or a car body.

[0036] Weight is saved by the invention. Compared with Figure 3 the solid or solid drawbars of the prior art described in

[0037] the fiber elements transmit the corresponding tensile forces with a significantly smaller weight as tensile elements.

[0038] The elastomeric bearings of the drawbar are saved by the invention and structural space is thus obtained.

[0039] The significant saving of structural space that can be achieved is particularly advantageous in compact bogie solutions, for example in drive bogies.

[0040] The maintenance or inspection work is simplified by the invention because the fiber elements can be elastically deformed perpendicular to the fiber direction. These fiber elements can therefore be removed more easily than the metal drawbars of the prior art described in Figure 3

[0041] The invention is explained in more detail below on the basis of the figures by way of example. Among them:

[0042] Figure 1 shows a first design of the invention,

[0043] Figure 2 shows a second design of the invention, and

[0044] Figure 3 shows the prior art described in the introduction.

[0045] Figure 1 shows a first design according to the invention arranged on a driven bogie DG.

[0046] The bogie DG has two ends when viewed in the travel direction, which are opposite each other.

[0047] As described below, the connection to the load-bearing structure TS of the rail vehicle is effected at the two ends.

[0048] The load-bearing structure TS has, by way of example, two longitudinals LT1, LT2 extending in parallel, which are connected to each other at a distance by cross members QUT.​

[0049] In the bogie DG shown here, its right end is connected to the load-bearing structure TS by means of the fiber element FE1.

[0050] The first end of the fiber element FE1 is connected to the bogie DG by the connection point ASP-DG. The second end of the fiber element FE1 is connected to the center of the shown crossbeam QUT by the connection point ASP-QUT.

[0051] In a preferred refinement, the fiber element FE1 consists of a plurality of partial fibers or partial fiber elements, such that the fiber element FE1 contains further fiber elements FE11, FE12, and the fiber element FE1 divides into the further fiber elements FE11, FE12 at the loop RNG.

[0052] The first end of the first fiber element FE11 is connected to not only the first longitudinal beam LT1 but also the crossbeam QUT by the connection point ASP-LT1.

[0053] In a preferred expansion (not shown in detail here), the first fiber element FE1 is connected in a closer region of the shown connection point ASP-LT1.

[0054] The second end of the first partial fiber element FE11 is connected to the fiber element FE1 at the loop RNG, or starts or departs at the loop RNG.

[0055] The first end of the second fiber element FE12 is connected to not only the second longitudinal beam LT2 but also the crossbeam QUT by the connection point ASP-LT2.

[0056] In a preferred expansion (not shown in detail here), the second fiber element FE2 is connected in a closer region of the shown connection point ASP-LT2.

[0057] The second end of the second fiber element FE12 is connected to the fiber element FE1 at the loop RNG, or starts or departs at the loop RNG.

[0058] The fiber element FE1 or the fiber elements FE11, FE12 are composed of high-load fibers preferably containing Kevlar fibers and / or carbon fibers or consisting entirely of Kevlar fibers and / or carbon fibers.

[0059] Preferably, for additional protection, the fibers or fiber elements FE1, FE11, FE12 are coated with a matrix.

[0060] The fiber elements FE1, FE11, FE12 are configured to transmit only traction force.

[0061] With Figure 3Compared with the solution shown in [reference], the longitudinal force is advantageously introduced directly at or near the longitudinal beams LT1 and LT2 by means of the fibre elements FE11 and FE12.

[0062] Due to the force deflection by means of the fibre elements FE11 and FE12, the cross member QUT no longer has to absorb the longitudinal forces conducted via these fibre elements.

[0063] Due to the force transmission geometry of these fibre elements, the cross member absorbs the resultant compressive force. Thereby, the bending load on the cross member QUT is reduced. Despite the additional compressive load, compared with the prior art according to Figure 3 the cross member QUT can be dimensioned less generously.

[0064] Figure 2 Reference is made to Figure 1 which shows a second design of the invention.

[0065] Here, additional rings RNG can be seen, starting from which the first fibre element FE11 and the second fibre element FE12 are further separated.

[0066] Correspondingly, a plurality of connection points are provided on the load-bearing structure TS.

[0067] By means of this further division, the traction force is optimally introduced into the load-bearing structure TS or its elements LT1, LT2 and QUT.

[0068] In the present invention, elements with defined stiffness can be used to connect the fibre elements to the load-bearing structure. In addition, elements with defined stiffness can be inserted between the individual fibre elements. Thereby, it is advantageously achieved that elastomeric bearings with a smaller size compared to the prior art can be used at the connection points.

Claims

1. A device for transmitting longitudinal forces from a bogie of a rail vehicle to a load-bearing structure, - having a bogie of a rail vehicle, - having the load-bearing structure of the rail vehicle, - Among them, The bogie is connected to the load-bearing structure by two traction elements, and the two traction elements transmit the longitudinal force formed by the two movement directions of the rail vehicle as a traction force from the bogie to the load-bearing structure, - wherein, when observed in the traveling direction of the rail vehicle, the two traction elements are arranged opposite to each other, characterized in that - the traction element is constructed as a fiber element, - the fiber element is made of high-load fibers and is constructed to transmit only the traction force, - wherein the bogie has two opposite ends, and wherein each end is connected to the load-bearing structure by a fiber element, - wherein the first end of the fiber element is connected to the end of the bogie by a connection point, - wherein the fiber element has a distribution element, - wherein the fiber element is divided into a plurality of additional fiber elements starting from the distribution element, - wherein the first fiber element, as an additional fiber element, is connected to the cross beam of the load-bearing structure near the connection point of the first longitudinal beam, - wherein the second fiber element, as an additional fiber element, is connected to the cross beam of the load-bearing structure near the connection point of the second longitudinal beam, - wherein the first longitudinal beam is arranged parallel to the second longitudinal beam, and the first longitudinal beam and the second longitudinal beam are connected to each other by the cross beam.

2. The device according to claim 1, characterized in that - wherein the bogie is constructed as a driven bogie, - wherein the fiber element is configured such that the braking force or traction force generated by the drive of the bogie is transmitted as a longitudinal force from the bogie to the load-bearing structure via the fiber element.

3. The device according to claim 1, characterized in that - wherein the first end of the fiber element is connected to the end of the bogie by a connection point, and - wherein the second end of the fiber element is connected to the center of the cross beam by a connection point.

4. The device according to claim 1, characterized in that, The second end of the fiber element is connected to the cross beam centrally or to the middle region of the cross beam.

5. The device according to claim 1, characterized in that, The fiber element is made of high-load fibers, or wherein the additional fiber elements are made of high-load fibers.

6. The device according to claim 5, characterized in that, The fiber element is made of Kevlar fibers and / or carbon fibers.

7. The device according to claim 1, characterized in that, The further division of the additional fiber elements is carried out by additional distribution elements, and the additional distribution elements are connected to the load-bearing structure after the further division is completed.

8. The device according to claim 1, wherein The load-bearing structure is part of a frame or a locomotive body or a car body.

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