WO2017102274A1

WO2017102274A1 - Track clearer for a rail vehicle

Info

Publication number: WO2017102274A1
Application number: PCT/EP2016/078582
Authority: WO
Inventors: Markus WECHTITSCH; Bernhard Kittinger
Original assignee: Siemens Ag Österreich
Priority date: 2015-12-16
Filing date: 2016-11-23
Publication date: 2017-06-22
Also published as: AT518142A1; EP3350055B1; CN209521696U; ES2858048T3; AT518142B1; SA518391705B1; EP3350055A1

Abstract

The invention relates to a track clearer for a rail vehicle, comprising a track clearer bar (1) and at least two elongated spring elements (2, 2'), the longitudinal extension of which runs parallel to a vertical direction (Z) in the operating state. The spring elements (2, 2') are rigidly connected to a chassis frame (7) of the rail vehicle at one side, and the track clearer bar (1) is connected to the spring elements (2, 2') via a connection means (3) at the other side. The aim of the invention is to achieve particularly good structurally dynamic properties and to prevent horizontal vibrations in the longitudinal direction (X) as much as possible. According to the invention, this is achieved in that the center of mass (M) of the track clearer is arranged within a distance (D) to a vertical plane (E) which runs through the geometric center of gravity (S₂,S ₂') of the spring elements (2, 2'). The distance (D) is between 0% and 40%, preferably between 0% and 25%, in particular between 0% and 15%, of the width (B) of the track clearer bar (1), said distance being measured normally to the vertical plane (E).

Description

description

Railway scraper for a rail vehicle

Technical area

The invention relates to a Bahnräumer for a

Railway vehicle, comprising a Bahnräumer beam and at least two spaced apart in a transverse direction, elongated spring elements whose longitudinal extent in

Operating state parallel to a vertical direction, which spring elements against a load in

Vertical direction are stiff and elastically yielding to a load in a longitudinal direction, the spring elements are on the one hand firmly connected to a chassis frame of the rail vehicle and on the other hand, the running in the transverse direction Bahnräumer beams over

Connecting means is connected to the spring elements.

State of the art

Since rail vehicles sometimes with high

Moving speeds, a foreign body located on the track of the rail vehicle in the event of a collision can cause significant damage to the rail vehicle

which can even lead to derailment of the rail vehicle. Therefore, a Bahnräumer is usually attached to the rail vehicle, with the obstacle can be removed from the way. The Bahnräumer thereby usually includes a transverse to the direction Bahnräumer- beams, the usual way between two longitudinal members of a chassis frame or bogie frame of the

Rail vehicle runs, the Bahnräumer beam over two spaced apart in a transverse direction

Spring elements is attached to the main frame of the rail vehicle or on the chassis frame. To the collision protection To be able to provide and to comply with the relevant statutory provisions, the Bahnräumer seen in the direction of travel must be mounted in front of the first set of wheels and must have the smallest possible distance in the vertical direction to the top rail.

For example, WO 2015/135752 A1 describes a

Device for obstacle detection in rail vehicles, in which the suspension by vertically arranged

Spring elements is formed and the spring elements have a stress-strain transducer, by means of which a more accurate statement about the actual collision mass can be made.

Due to vertical track position disturbances in connection with the production-related or wear-related out-of-roundness of the wheels, a dominant vertical vibration excitation of the track clearer occurs during operation of the rail vehicle. Since the path scraper forms a vibratory system due to its mass and the elasticities of the suspension and Bahnräumer beams, the structure-dynamic properties are of particular importance in the design of the Bahnräumers. In particular, horizontal vibrations in the longitudinal direction, whose amplitude is parallel to the direction of travel, and vertical horizontal mixing vibrations lead to it

Fatigue in the suspension or in Bahnräumer and are generally considered to be disadvantageous. Since the

Bahnräumer beam must be arranged as close as possible to the rail top due to legal requirements, bending moments are generated by a transverse direction in the spring elements in the above-mentioned vibration modes, so that the spring elements are subjected to higher loads.

Object of the invention

It is therefore an object of the invention to overcome the disadvantages of the prior art and a Bahnräumer for a Rail vehicle to propose, which has particularly good structural dynamics properties, with horizontal vibrations in the longitudinal direction are largely avoided.

Presentation of the invention

This object is achieved by a Bahnräumer with the features of claim 1. Advantageous embodiments of the invention are defined in the respective dependent claims.

The invention relates to a Bahnräumer for a

Connecting means is connected to the spring elements.

According to the invention, it is provided that the mass center of the web scraper is arranged within a distance from a vertical plane passing through the geometric center of gravity of the spring elements, the distance being between 0% and 40%, preferably between 0% and 25%, in particular between 0% and 15 %, a width of the Bahnräumer beam measured normal to the vertical plane.

The fact that the suspension of Bahnräumer beam on

Chassis frame via the at least two spring elements, the design of the spring elements is decisive for the vibration of the entire system. The distance between the Spring elements in the transverse direction is preferably selected such that in each case a spring element with a longitudinal member of the chassis frame either directly or indirectly,

for example, via one or more consoles connected. For example, the suspension may comprise two arms, wherein in each case one arm of one of the two spring elements

having. This achieves a symmetrical connection and the greatest possible stability of the hanger or track cleaner. The spring elements, preferably identical

are executed, are further formed elongated and thus have a longitudinal extent, which is the

Main extension direction of the spring elements corresponds. In order to bridge the distance between the chassis frame or between the longitudinal members of the chassis frame and the rail top, the longitudinal extent of the runs

Spring elements parallel to the vertical direction. Due to this fact, the dimensions of the spring element in

Longitudinal direction and transverse direction smaller than the dimension of the spring element in the vertical direction. Longitudinally

Transverse direction and vertical direction form one

orthogonal reference system, wherein the longitudinal direction corresponds to a direction of travel of the rail vehicle.

The vertical plane, which runs through the geometric center of gravity of the spring elements and is normal to the longitudinal direction, thereby represents a so-called vibration neutral plane of the spring element with respect to the vertical excitation. In a component subject to bending, there is a so-called neutral fiber, which due to

Bending stress is neither lengthened nor shortened. In a purely loaded on bending component, the neutral fiber passes through the geometric center of gravity of

Cross-sectional area of the component. Accordingly, the vertical plane passes through the neutral fiber of the flexure stressed spring elements. Forces, which are directed in the vertical direction and attack in the vertical plane, therefore cause no bending moment in the spring elements. Of the

geometric center of gravity is defined purely by the outer Shape of the spring elements or on the shape of the individual horizontal cross sections, seen normal to the vertical direction. If, for example, the spring elements have a plane of symmetry parallel to the vertical plane, the geometric center of gravity of all horizontal cross sections of the spring elements are arranged on a straight line.

Due to the vertical alignment of the spring elements ensures that no bending moment is exerted on the spring element by the weight of the Bahnräumer beam. In the design of the spring elements, it is important to note that it is often required that the spring elements are stiff relative to a load in the vertical direction, so only minimal deformations occur at such a load, but elastically yielding to a load in the longitudinal direction, for example, impact forces be able to attenuate by the energy required for deformation and / or an obstacle by means of an am

Spring element mounted strain voltage transformer

to be able to detect. Due to the vibration properties associated with the design of the spring elements, vibrations with a horizontal component in the longitudinal direction have a particularly disadvantageous effect, since, due to the resilience of the spring elements to horizontal loads in

Longitudinal bending moments and elastic deformations are caused.

However, if a vertical vibration excitation takes place directly in the vibration neutral plane, ie the vertical plane, the result is, depending on the rigidity of the

Spring element, only a dominant vertical vibration that causes vertical forces, without horizontal

Oscillation component in the longitudinal direction. Since forces caused by horizontal vibration components can be subsumed in the bulk center of the web scraper, the location of the mass center relative to the vertical plane is of particular importance. The closer to the mass center of the

Bahnräumers arranged at the vertical plane, the more less is the horizontal vibration component in

Longitudinal direction with dominant vertical vibration excitation of the entire Bahnräumers. The lower the horizontal vibration component in the longitudinal direction, the lower the forces resulting from this vibration. Thus, bending stress of the spring element and at the same time reduced by the vibration induced

Bending moments conditional deformations of the spring elements.

Positive effects have already been achieved when the distance between the center of mass of the web scraper, normal to the vertical plane or measured in the longitudinal direction, and the vertical plane is not more than 40% of the width of Bahnräumer- bar, measured in the same direction. The

Reduction of horizontal vibration components in

Lengthwise increases when the distance is at most 30%, 20% or 10% of the width of the Bahnräumer beam. An optimal result can be achieved if that

Center of mass in the vertical plane is, as the distance is 0%. Generic Bahnräumer beams have a width between 50mm and 150mm, preferably between 60mm and 100mm, in particular 80mm on. The larger the mass of an element, the more the distance affects the horizontal vibration component in the longitudinal direction. The distance between the center of mass of higher mass elements, such as the scraper beam, and the vertical plane should therefore typically be less than that between the center of gravity of lower mass elements and the

Vertical plane.

Due to the reduced horizontal vibrations in

Longitudinal direction, dominated by the vertical

Vibratory excitation caused occur, no or very little fatigue in Bahnräumer, especially in the spring elements, so that the life of the Bahnräumers increases and reduces the maintenance intensity. According to one embodiment of the invention, it is provided that the spring elements are designed as leaf springs.

In particular, when the spring elements as leaf springs

are formed, the previously described arrangement of the center of mass of the Bahnräumers with respect to the

Vertical plane particularly positive because leaf springs are more sensitive to horizontal vibrations in the longitudinal direction than other spring elements. This is especially true when the leaf spring is oriented so that the broad side of the leaf spring in the longitudinal direction, ie

Bending stiffness and the bending resistance of the

Leaf springs are less at a load in the direction of travel than transverse to the direction of travel. In principle, however, the spring elements need not be sheet-shaped or flat, but may also be formed by open or closed profiles, e.g. be designed as a section of a profile tube.

A further embodiment of the invention provides that the mass center of Bahnräumer beam and the

Mass centers of the connecting means are arranged within the distance from the vertical plane. Although the individual centers of mass are used in the determination of the

Total mass center, ie the mass center of the

Bahnräumers can influence each other, so that all individual mass centers are outside the distance according to the invention, but the center of mass of the Bahnräumers is within, the horizontal vibration component decreases in

Longitudinally caused by the dominant vertical excitation vibrations, although the

Mass centers of the individual building the Bahnräumer

Elements, especially the connecting means and the

Railway scraper beams, within the distance, are arranged as close as possible to the vertical plane.

Since the mass of the Bahnräumer beam usually has the largest share of the oscillatory mass of the Bahnräumers, the location of the center of mass of Bahnräumer bar of central to the horizontal vibrations or the horizontal components of mixed vibrations in

To minimize longitudinal direction. Therefore, it is provided in a preferred embodiment of the invention that the

Center of the Bahnräumer beam is in the vertical plane, so that the Bahnräumer beam by the dominant vertical vibration excitation during operation of the

Rail vehicle not in a mixed vibration with

horizontal component is offset in the longitudinal direction.

Particularly good effects can be achieved if, in addition, the center of gravity of the oscillatory system, that is, the web clearing bar, the at least one spring element and the connecting means comprising web scraper, in the

Vertical plane lies.

In order to reduce the mass of the Bahnräumer beam, without neglecting the necessary stability of Bahnräumer beam, which is required for clearing the route, the Bahnräumer beam as a hollow profile, for example as

circular tube or as a hollow profile with rectangular or square cross-section formed. To the center of gravity of the Bahnräumer beam and the connecting means in a simple manner according to the invention relative to

To be able to position the vertical plane, thereby protrude free ends of the spring elements in the hollow Bahnräumer beam to the free end of the spring elements with the

Bahnräumer bar to connect. For this purpose, an opening for a free end in an upper top wall of the Bahnräumer beam is generally provided in each case in order to accommodate the free end of the respective spring element. The free end of the spring element is that end which is not firmly connected to the chassis frame. It is therefore provided in a further embodiment of the invention that the Bahnräumer beam is designed as a hollow profile and free ends of the at least one spring element in the

Railroader beams protrude into it. In a further preferred embodiment of the

Invention is provided that a connecting means at least one connecting element and at least one on

Includes connecting element arranged elastomeric element to dampen vibrations occurring during operation.

Elastomer elements are particularly well suited for damping vibrations both in the vertical direction and in the longitudinal direction, here in the direction of travel, and in the transverse direction, here transverse to the direction of travel. Thus, at least a part of the vibrations caused by the vertical vibration excitation, thus also still occurring horizontal vibrations in the longitudinal direction or in the transverse direction, are damped. A further advantage of the connection of the spring element via a connecting element, for example a screw, and an elastomer element arranged thereon is that a relative movement between the ends of the longitudinal members of the chassis frame, for example due to a distortion of the rails, does not lead to a tension of the web clearer but the elastically deformed at least one elastomeric element and so the relative movement is compensated. Thus, the emergence of large clamping forces in the chassis frame is prevented or occur only relatively small

Clamping forces on.

According to a further preferred embodiment variant of the track clearer according to the invention, the free ends of the spring elements are respectively clamped between two elastomer elements of a connecting means. By clamping the free end of the respective spring element between two elastomer elements, a particularly good damping of the vibrations is achieved. For example, that is

Connecting element in this case designed as guided in a metal bushing screw, on which connecting element in front of and behind the spring element, an elastomeric element is disposed on the metal bush and wherein the tension is achieved by a disc arranged behind one of the elastomeric elements. On the one hand, the mass center of the oscillatory

Systems, so the wrecker, in the vertical plane or in the vicinity of the vertical plane to be able to move and

On the other hand, to be able to achieve optimized vibration damping is in a particularly preferred

Embodiment provided that the free end of each spring element by means of an even number

Connecting means is attached to the Bahnräumer beam, wherein one half of the connecting means on the chassis frame side facing the vertical plane and the other half of the connecting means on the side facing away from the chassis frame of the vertical plane is attached to the Bahnräumer beam. The optimized vibration damping is achieved both by the connection of the spring element to both side walls of the Bahnräumer beam, seen in the longitudinal direction, as well as by the even number of connecting means. Due to the symmetrical distribution of the connecting means on both sides of the vertical plane, a balancing of the center of gravity of the individual connecting means with respect to the vertical plane is achieved.

A particularly simple production and vibration engineering design of the spring elements is achieved in that the spring elements in a further embodiment of the invention, with respect to the vertical plane symmetrical

are formed, that is, in other words, the vertical plane and the plane of symmetry of the spring element.

Especially for driverless rail vehicles,

For example, subways or commuter trains, the Bahnräumer serves as a device for

Obstacle detection, for example, after the detection of a collision, wherein the detected collision mass is above a certain threshold, to be able to trigger an emergency braking. Therefore, at least one of the spring elements, a strain-voltage converter, for example. A strain gauge or a piezoelectric transducer, be mounted over which continuously the force-time curve of the spring element is determinable. If a collision leads to an elastic or plastic deformation of the spring element, this is detected by the expansion voltage converter and sent to an evaluation unit arranged on the board

forwarded. But there are horizontal vibrations in

In the longitudinal direction of the track clearer or the resulting bending moments or deformations provide similar measurement results as a collision and therefore can lead to erroneous decisions in the evaluation of the measurement results, has the reduction of horizontal vibrations in

Longitudinal direction for Bahnräumer with such measuring systems of particular importance. Therefore, in a further particularly preferred embodiment of the invention, it is provided that, preferably via a signal-conducting connection with an on-board evaluation unit

connectable, strain-voltage converter is attached to at least one of the spring elements. The positive effects of vibration damping and reduction of horizontal vibrations in the longitudinal direction have a particularly positive effect on the measuring accuracy of the expansion

Voltage converter and the reliability of the measurement results, whereby the evaluation of the measurement data is simplified and errors in the evaluation, which can for example lead to an unnecessary full braking of the rail vehicle can be reduced or avoided altogether.

Brief description of the figures

To further explain the invention, reference is made in the following part of the description to the figures, from the further advantageous embodiments, details and

Developments of the invention can be seen. The figures are to be understood as exemplary and should the

Outline invention character, but do not constrict it or even conclude. It shows: Fig. 1 is a perspective view of a first embodiment of a Bahnräumers on a landing gear frame.

Fig. Figure 2 is a front view of a lower part of the track cleaner;

Fig. FIG. 3 is a plan view of the sheet remover of FIG. 2; FIG.

Fig. 4 is a sectional view of the connection between

Spring element and track clearing beam;

Fig. 5 is a perspective view of a second

Variant of a Bahnräumers;

Fig. 6 is a side view of the chassis frame

mounted Bahnräumers of Fig. 1;

Fig. 7 is a side view of the chassis frame

mounted Bahnräumers of FIG. 5.

Embodiment of the invention

FIG. 1 shows a variant of an embodiment

inventive sheet remover. The Bahnräumer comprises two spaced apart in a transverse direction Y, elongated spring elements 2,2 'and extending in the transverse direction Y Bahnräumer beam 1, wherein each spring element 2,2' is connected via connecting means 3 with the Bahnräumer beam 1. The spring elements 2, 2 'are fixed with a

Chassis frame 7, whose basic course is shown in Fig. 6 by way of example, connected to a rail vehicle, wherein the Bahnräumer seen in the direction of travel, which corresponds to a longitudinal direction X, mounted in front of the foremost wheelset of the rail vehicle. The

Spring elements 2,2 'are aligned substantially vertically in the operating state, so that the longitudinal extent of the

Spring elements 2,2 'parallel to a vertical direction Z extends. Each spring element 2, 2 'is fixedly connected at one longitudinal end to a bracket 10, 10' fixed to a longitudinal member 7a of the chassis frame 7 and has at the other longitudinal end a free end 4, 4 ', which is connected to the

Bahnräumer bar 1 is connected. The scraper bar 1 runs parallel to the transverse direction Y between the two longitudinal members 7a.

The left spring element 2 forms with the left bracket 4 a first arm, while the right spring element 2 'with the right bracket 4' forms a second arm. The connection of bracket 10,10 'and longitudinal member 7a, for example via a screw or welded connection, in the present embodiment, the connection via fastening screws 9. console 10,10' and spring element 2,2 'are connected to each other via connecting screws 8. In alternative embodiments, it is equally conceivable that no brackets 10,10 'are provided between the spring elements 2,2' and the longitudinal members 7a, but the

Spring elements 2,2 'is attached directly to the side member 7a. According to legal provisions, the lower edge of the Bahnräumer beam 1 must be arranged in the vertical direction Z as close to the top rail, which also explains the vertical arrangement of the arms and the spring elements 2,2 '.

The spring elements 2,2 'are in the present

Embodiment designed as leaf springs whose

Broad sides are aligned in or against the direction of travel, so that the spring elements 2,2 'by a collision of the Bahnräumer beam 1 with an obstacle lying on the route in the direction of the chassis frame 7, ie against the direction of travel, is bent. This is the

Spring elements 2,2 'formed compliant due to their design as leaf springs against a load in the longitudinal direction X, as described above, whereas the

Spring elements 2,2 'against a load in

Vertical direction Z are formed comparatively stiff and therefore insensitive to loads in

Vertical direction Z are.

While the consoles 10,10 'are relatively rigid with the

Side members 7a connected and solid, form the spring elements 2,2 'together with the Bahnräumer beam 1 an oscillatory system, which by the dominant vertical vibration excitation in the operating state of

Rail vehicle is vibrated. The

vertical excitation usually results

vertical track position disturbances and / or the unavoidable runout of the wheels of the rail vehicle. Due to the spring elements 2,2 ', especially if these as in

present case are formed as leaf springs are in Bahnräumern according to the prior art in addition to the vertical vibrations in the vertical direction Z also

horizontal vibrations in the longitudinal direction X or

Mixed vibrations with horizontal component in

X longitudinal direction excited. The amplitude of the horizontal vibrations is aligned parallel to the longitudinal direction X in the present case. Such horizontal

Vibrations cause fatigue in the Schrauboder welded joints or in the spring elements 2,2 'itself and should be avoided as far as possible.

Fig. 2 shows a front view of a half of

It can be seen that a free end 4 of the left spring element 2, in this case the lower end seen in the vertical direction, is connected to the web clearing bar 1 via two connecting means 3. The Bahnräumer beam 1 protrudes beyond the spring element 2 seen in the transverse direction Y.

FIG. 3 shows the basic principle of the invention, with reference to a plan view of the oscillatory system from FIG. 2

clarified, shown. A vertical plane E, by the geometric center of gravity S _{2 of} the left spring element 2 and by the geometric center of gravity S2 'of the right

Spring element 2 'extends, serves as a reference plane for the following considerations. The vertical plane E, which is aligned normal to the longitudinal direction X and parallel to the vertical direction Z and to the transverse direction Y, represents the

vibration neutral level of the spring elements 2,2 ', since the Vertical plane E through the neutral fibers of the

Spring elements 2,2 'extends.

If the center of mass M of the path sweeper lies outside the vertical plane E, then the dominant vertical excitation in operation leads to a mixing oscillation with a horizontal component in the longitudinal direction X. According to the prior art, the distance of the mass center M to the vertical plane E is often large, so that the horizontal vibrations through elaborate

Constructions must be avoided.

Since the horizontal vibration component in the longitudinal direction X of excited by the dominant vertical excitation

Vibrations is smaller, the smaller the distance D of the center of mass M to the vertical plane E, is

According to the invention provided that the mass center M

are arranged within a distance D from the vertical plane E. In this case, the distance D is between 0% and 40% of the width B, shown in FIGS. 1 and 5, of the clearing bar 1. This results in an area which corresponds to twice the distance D, in this case 80% of the width B of FIG Bahnräumer beam 1, which is aligned symmetrically to the vertical plane E and in which the center of mass M

is arranged. Since a smaller distance D has a positive effect on the oscillation properties, the distance D is preferably up to 25% or up to 15% of the width B of the tracker beam 1. For clarification, the range limits defined by the distance D have been drawn as dashed lines.

Since the mass of the Bahnräumer beam 1 is compared to the connecting means 3 and the spring elements 2,2 'is large, it is provided in the present embodiment that the center of mass Mi of Bahnräumer beam 1 in the

Vertical plane E is, so the distance D for the Bahnräumer- bar 1 is zero. Due to the training of

Connecting means 3, which will be discussed in more detail below, are the mass centers M _{3 of} the connecting means. 3 not directly on the vertical plane E but within the distance D. In the present embodiment, the Bahnräumer beam 1 as a hollow profile with square

Cross section formed (see Figures 6 and 7), wherein the width B of Bahnräumer beam 1 is 80mm. The

Mass centers M ₃ are seen in the longitudinal direction X within 28mm in front of and behind the vertical plane E.

From the sectional view shown in Figure 4, the structure of the two connecting means 3 can be seen, which serve to connect the end 4 of the spring elements 2 with the Bahnräumer beam 1. It goes without saying that the free end 4 'of the other spring element 2' is connected to the Bahnräumer beam 1 analogously to the following description. As can be seen in FIGS. 6 and 7, the free end 4 of the spring element 2 projects into the hollow body

trained Bahnräumer beams 1 and is connected by means of the connecting means 3 with the side walls of Bahnräumer- bar 1. In order to accommodate the free ends 4 of the spring element 2, the upper top wall of the Bahnräumer- bar 1 has an opening through which the free end 4 of the spring element 2 is guided into the interior of the Bahnräumer beam 1. In order to damp vibrations occurring in the vertical and / or horizontal direction, in particular in the longitudinal direction X, the connecting means 3 comprises two sleeve-shaped elastomer elements 3b, 3c acting as a screw

trained connecting element 3a or on a pushed onto the connecting element 3a socket 3d, preferably made of metal, sitting. The elastomer elements 3b, 3c are arranged so that the one elastomer element 3b contacts one side of the spring element 2 and the other

Elastomer element 3 c contacted the other side of the spring element 2. In other words, the spring element 2 between the two elastomer elements 3b, 3c on

Mounted connecting element 3a and braced by a nut and a disc. For optimal vibration decoupling are two analogous compound 3 per

Spring element 2,2 'is provided, wherein a connecting element 3 is connected to the one side wall of the Bahnräumer beam 1 and the other connecting element 3 with the other side wall of the Bahnräumer beam 1. In alternative

Design variants can also be more than two

Connecting means 3 per spring element 2,2 'may be provided, wherein the displacement of the overall center of gravity in the

Vertical level E an even number of connecting means 3 is provided, so that in each case the same number

Connecting means 3 are connected to each side wall.

Fig. 5 shows a second embodiment of the invention which differs only in the design of the brackets 10,10 'from the first embodiment of FIG. 1, whereas the oscillatory system is identical ident formed. While in the first embodiment, the

Connecting screws 8 between the brackets 10,10 'and the spring elements 2,2' are fixedly mounted, so

Consoles 10,10 'and spring elements 2,2' relative to each other are not displaced, the connecting screws 8 in the second embodiment in from the consoles

arranged elongated holes, so that the

Spring elements 2,2 'and also the Bahnräumer beam 1 relative to the brackets 10, 10' in the vertical direction Z are displaced as soon as the connecting bolts 8 are released.

On the other hand, the consoles are 10,10 'in the second

Embodiment attached via fastening screws 9 to the longitudinal beams 7 a, while in the first

Embodiment variant, the fastening screws 9 are arranged in from the brackets 10,10 'formed slots to position the entire Bahnräumer in the vertical direction Z, as soon as the mounting screws 9 are released. Such vertical positioning is necessary in order to adjust the distance to the top rail when the wheels wear. In Figure 6 is a side view of the first

Embodiment of the Bahnräumers shown, with a majority of the chassis frame 7 can be seen. In contrast, FIG. 7 shows an enlarged side view of the second embodiment variant of the web scraper.

In the first embodiment shown in Figure 6, the connecting screws 8 and

Fixing screws 9 parallel to the longitudinal direction X

aligned, wherein the fastening screws 9 a

End face of the longitudinal member 7a with the plate-shaped brackets 10,10 'firmly connect. In the in Figure 7

the second embodiment shown surround the brackets 10,10 'the upper part of a primary suspension 11, wherein the screw with the longitudinal members 7a in

encompassing section by means of parallel to

Vertical direction Z aligned fastening screws 9 takes place, wherein the fastening screws 9 are connected to the underside of the longitudinal member 7 a. The

Connecting screws 8, which the consoles 10,10 'with the

Connect spring elements 2,2 'are attached to a flat, parallel to the vertical plane E aligned end face of the respective console 10,10'. Also clearly visible is the analogous structure of the oscillatory system in both variants, ie of spring elements 2,2 ', Bahnräumer beam 1 and

Connecting means 3. As already mentioned, it can be seen from the side views that the free ends 4,4 'of the

Spring elements 2,2 'in the hollow profile

protrude trained Bahnräumer beams 1 and are fixed there by means of the connecting means 3 on Bahnräumer beam 1. The spring elements 2,2 'have an elongated shape and are aligned parallel to the vertical direction Z, so that the longitudinal extent of the spring elements 2,2' extends parallel to the vertical direction Z. It can also be seen in FIGS. 6 and 7 that a strain-voltage transformer 6, for example in the form of a strain gauge or a piezoelectric transducer, is provided on at least one of the spring elements 2, 2 'and on both

Spring elements 2,2 ', more precisely on the chassis frame 7 facing side of the spring element 2,2', is mounted. By means of the expansion-voltage converter 6, the bending or deformation of the corresponding spring element 2,2 'is continuously measured in order to detect a collision with an obstacle can. Since such strain voltage converter 6 and the

Detect amplitudes of horizontal vibrations in the longitudinal direction X, the measurement accuracy of the strain-voltage converter 6 is increased by the combination of the strain voltage converter 6 and the web scraper invention and reduces the probability of vibration-related measurement errors. The expansion voltage converter 6 is connected via a connection 6a to a signal-conducting connection 5, also shown in FIGS. 1 and 5. The signal-conducting connection 5, in turn, runs to an evaluation unit, not shown, arranged on the board.

For the sake of clarity, FIG. 7 again shows the vertical plane E and the distance D, as well as the center of mass Mi of the path clearer beam 1 and the centers of mass M ₃ of FIG

Lanyard and the center of mass M of Bahnräumers drawn. Also indicated is the position of the geometric center of gravity S ₂ , S ₂ 'of the spring elements ₂ , ₂ '.

It can be seen that the vertical plane E on the one hand represents a plane of symmetry of the spring elements 2,2 'and on the other hand, the trained as a hollow profile Bahnräumer- bar 1 is aligned symmetrically to the vertical plane E.

List of reference numbers:

1 railway clearing bar

2 spring element

3 connecting means 3a connecting element

3b first elastomeric element

3c second elastomeric element

3d socket

4 free end of the spring element. 2

5 signal-conducting connection

6 stress-strain transducers

6a connection

7 chassis frame

7a side member

8 connecting screw

9 fixing screw

10 console

11 primary suspension

X longitudinal direction

Y transverse direction

Z vertical direction

B width

D distance

E vertical plane

M Mass center of the railway clearer

Mi Massenzentrum of Bahnräumer beam

M ₃ center of mass of the bonding agent

S ₂ geometric center of gravity of the spring element

Claims

claims

A track cleaner for a rail vehicle, comprising a track clearance bar (1) and at least two elongated ones spaced apart in a transverse direction (Y)

Spring elements (2,2 ') whose longitudinal extent in

Operating state parallel to a vertical direction (Z) extends, which spring elements (2,2 ') against a load in the vertical direction (z) are stiff and resilient to a load in a longitudinal direction (X) are resilient,

wherein the spring elements (2,2 ') on the one hand firmly connected to a chassis frame (7) of the rail vehicle and on the other hand extending in the transverse direction (Y) Bahnräumer beams (1) via connecting means (3) with the spring elements (2,2') connected is,

characterized in that

the center of mass (M) of the path sweeper within a distance (D) from one through the geometric

Focal points (S2, S2 ') of the spring elements (2,2') extending vertical plane (E) is arranged, wherein the distance (D) between 0% and 40%, preferably between 0% and 25%, in particular between 0% and 15 %, a width (B) of the path clearing bar (1) measured normal to

Vertical plane (E), is.

2. Bahnräumer according to claim 1, characterized in that the spring elements (2,2 ') are formed as leaf springs.

3. Bahnräumer according to claim 1 or 2, characterized in that the mass center (Mi) of Bahnräumer beam (1) and the mass centers (M ₃ ) of the connecting means (3) within the distance (D) from the vertical plane (E) are .

4. Bahnräumer according to one of claims 1 to 3, characterized

characterized in that the mass center (Mi) of the

Bahnräumer beam (1) in the vertical plane (E) is located.

5. Bahnräumer according to one of claims 1 to 4, characterized

characterized in that the Bahnräumer bar (1) as

Hollow profile is executed and free ends (4,4 ') of the spring elements (2,2') protrude into the Bahnräumer beam (1).

6. Bahnräumer according to one of claims 1 to 5, characterized

characterized in that a connecting means (3) at least one connecting element (3a) and at least one on

Connecting element (3a) arranged

Elastomer element (3b, 3c) comprises in order to operate

dampening occurring vibrations.

7. Bahnräumer according to claim 6, characterized in that the free ends (4,4 ') of the spring elements (2,2') respectively between two elastomeric elements (3b, 3c) of a

Clamping means (3) are clamped.

Railway scraper according to one of claims 1 to 7, characterized in that the free end (4,4 ') of each

Spring element (2,2 ') by means of an even number of connecting means (3) on Bahnräumer beam (1) is attached, wherein one half of the connecting means (3) on the chassis frame (7) facing side of

Vertical plane (E) and the other half of the

Connecting means (3) on the chassis frame (7) facing away from the vertical plane (E) on Bahnräumer- bar (1) is attached.

Railway scraper according to one of claims 1 to 8, characterized in that the spring elements (2,2 ') with respect to the vertical plane (E) are formed symmetrically.

Railway scraper according to one of claims 1 to 9, characterized in that a, preferably via a

signal-conducting connection (5) with an on-board evaluation unit connectable, strain-voltage converter (6) on at least one of

Spring elements (2,2 ') is mounted.