WO2019121096A1

WO2019121096A1 - Measuring device support for measuring a laid rail

Info

Publication number: WO2019121096A1
Application number: PCT/EP2018/084155
Authority: WO
Inventors: Nils GOLLUB; Martin Schöpf; Christian Gutmann
Original assignee: Müller-Bbm Rail Technologies Gmbh
Priority date: 2017-12-22
Filing date: 2018-12-10
Publication date: 2019-06-27
Also published as: DE102017223736B4; DE102017223736A1

Abstract

The invention relates to a measuring device support (105) comprising a profiled support (106), two mutually spaced lateral guides (107, 108), and two coupling elements (109, 110). The profiled support (106) is rigid, extends in a longitudinal direction, and is designed to slide in the longitudinal direction above and along a rail (101). Each of the two lateral guides (107, 108) is designed to rest laterally against the rail (101) and has a linear contact strip which extends in the longitudinal direction of the profiled support (106) and which is designed to contact the rail (101). Each of the lateral guides (107, 108) can be provided with two rollers (401, 402, 403, 404). Each of the two coupling elements (109, 110) connects one of the two lateral guides (107, 108) to the profiled support (106) in a rigid or rotatable manner.

Description

MEASURING DEVICE SUPPORT FOR MEASURING A RAILED RAIL

DESCRIPTION [0001] The measurement of rails in the longitudinal direction, such as the

Measuring the rail roughness or the longitudinal profile requires a precise lateral guidance of a measuring device along the rail. As a reference point for the lateral position of the measuring lines usually the side surface of the rail head is used. This has in practice often bumps, for example due to corrosion or defects, whereby a precise side guide is difficult. The object of the invention is therefore to provide a measuring device carrier for measuring a laid track with improved lateral guidance.

The object is achieved by a measuring device carrier according to claim 1. Such a measuring device carrier comprises a carrier profile, two spaced side guides and two coupling elements. The carrier profile is rigid, extends in a longitudinal direction and is designed to slide longitudinally on top and along the rail. Each of the two lateral guides is designed for lateral engagement with the rail and has a linear contact strip extending in the longitudinal direction of the carrier profile, which is designed as a contact to the rail. Each of the two coupling elements rigidly or rotatably connects one of the two side guides to the carrier profile. A linear guide, that is a flat guide by means of a surface with an aspect ratio greater than one, at two different positions such as at the beginning and at the end of the carrier profile allows precise cornering with relatively low longitudinal friction and very good tracking in the lateral direction. The invention can be used in all known rail types.

In addition, the contact strip of each of the two side guides may be formed as a linear slide bearing, for example, by using robust and low-friction materials, the friction resistance in Further reduce longitudinal direction relative to the side surface of the rail and show little signs of wear during operation.

The contact strip may have a length in the longitudinal direction of the carrier profile, which is such that lateral unevenness of the rail are compensated. Depending on the length of the sliding surface then smaller fluctuations can be compensated, for example, averaged, while the longitudinal profile or the roughness of the rail surface can be detected by a mounted on the instrument carrier measuring device (not shown in the figures).

For linienformigen leadership, the contact strip in the longitudinal direction of the carrier profile, for example, have a length which is at least three times the width of the contact strip in the vertical direction, that is, an aspect ratio of greater than or equal to 3: 1 from length to width. The aspect ratios may be, for example, 3: 1, 5: 1, 9: 1 or 15: 1.

The two side guides may each have one (or more) permanent magnets, which is adapted to the lateral concerns of

Side guide on the rail to pull the side guides with magnetic force to the rail, wherein the magnetic force can be fixed or preset, for example, on the distance, or the number of magnets or their dimensions. Side guides held on a rail by magnetic force allow the meter carrier to be quickly removed from the rail. Thus, by simply lifting the measuring device carrier (including measuring devices), the track area can be cleared very quickly. This contributes to the safe use of the gauge carrier in the track area.

Alternatively, each of the two side guides may comprise an electromagnet which is adapted to pull the side guides with magnetic force to the rail in lateral abutment of the side guide on the rail. By varying the current intensity, the magnetic force can be varied, that is adjusted. Another alternative would be the use of a spring force, then in addition a mechanical support of the spring would be required. [0005] Furthermore, each of the two coupling elements can rotatably connect one of the scout guides to the carrier profile, the rotation being about a rotational axis in the vertical direction. Such hinges allow a better adaptation of the side guide to the side surface of the rail. For example, the side guides are spaced from each other by at least three times their own lengths. As a result, a higher lateral stability of the measuring device carrier can be achieved when the measuring device carrier moves along the rail.

The side guide may additionally each have two (or more) spaced-apart rollers, which are arranged for example at the two longitudinal ends of the contact strips and which can further reduce the frictional resistance of the contact surfaces.

The invention will be explained in more detail with reference to the embodiments shown in the figures, wherein like elements are provided with the same reference numerals. It shows:

1 shows a schematic three-dimensional representation of a measuring device carrier with lateral guidance along a vignole rail;

FIG. 2 shows the measuring device carrier shown in FIG. 1 in a cross-sectional representation;

FIG. 3 shows a cross-sectional illustration of a measuring device carrier suitable for use in rails with a groove;

FIG. 4 is a schematic three-dimensional representation of a measuring device carrier with lateral guidance along the rail, using an additional roller mechanism; and

FIG. 5 shows the measuring device carrier shown in FIG. 1 in a cross-sectional view. 1 shows schematically a vignole rail (mushroom rail, head and

Bar rail), which comprises a rail head 102, a horizontally extending rail foot 103 and a rail head 102 and Rail has 103 connecting vertical web 104. At the top of the rail head 102, ie on the running surface, a longitudinally extending measuring device carrier 105 is placed in the longitudinal direction, which comprises a carrier profile 106, two side guides 107, 108 spaced apart from one another and two coupling elements 109, 110. Carrier profile 106 is rigid, adapted for attachment of gauges (not shown) and for longitudinal sliding relative to and along the rail. In the present case, the carrier profile 106 is a square profile, but all imaginable rigid profiles can be used in any arrangement.

Each of the two side guides 107, 108 is formed for lateral abutment against the rail head 102 and has a in the longitudinal direction of the carrier profile 106 extending, linear contact strip (not visible in Figure 1), which is designed as a contact with the rail head 102. The two side guides 107, 108 are each connected via one of the coupling elements 109, 110 rotatably connected to the carrier profile 106 with respect to a vertical axis of rotation. Alternatively, the coupling elements may be designed as a rigid connection, wherein the carrier profile 106, side guides 107, 108 and coupling elements 109, 110 may be made wholly or partially in one piece.

FIG. 2 shows the measuring device carrier 101 explained above with reference to FIG. 1 in cross section. In the cross-sectional view, on the one hand, a 110 of the pivoting coupling elements 109, 110 and 108 of the side guides 107, 108 is shown in more detail. The lateral guide 108 comprises an end piece 201 fastened to the carrier profile 106, for example by means of screws, and a rotatable extension sleeve 202, whereby the end piece 201, extension sleeve 202 and side guide 108 each have bores which permit a rotation axis to be guided through a screw 203 in the vertical direction. On the other hand, a permanent magnet 204 as well as a contact strip 205 can be seen from the cross-sectional representation. In the present example, the permanent magnet 204 is embedded in the contact strip 205 and the contact strip 205 is integrated into the side guide 108, that is, for example, made in one piece with this. Other designs and arrangements of permanent magnet 204 and contact strip 205 are as possible. In the embodiment illustrated in FIGS. 1 and 2, the contact strips have approximately the flat dimensions of the side guides 107, 108.

Figure 3 also shows in a cross-sectional view of an embodiment of the shown in Figure 2, suitable for use in rails with groove gauge carrier. Such a rail 301 comprises a rail head 302, a horizontally extending rail foot 303, and a vertical web 304 connecting a rail head 302 and rail foot 303. On the running surface of the rail head 102, a longitudinally extending meter support 305 is placed longitudinally, which has a support profile 306, two of spaced side guides (only one side guide 307 is visible in Figure 3) and two coupling elements (only one coupling element 308 is visible in Figure 3). The carrier profile 306 is designed substantially like the carrier profile 106 according to FIG. 1, wherein the carrier profile 306 has a bore 309 on the side facing the running surface of the rail 301, to which the coupling element 308 is pivotally mounted and by which a screw 310 defines a rotation axis vertical direction is performed. The screw 310 is also guided through a bore in the side guide 307 and a bore of a spacer sleeve 311 arranged therebetween. The side guide 307 further includes a permanent magnet 312 and a contact strip 313 in a manner similar to that described above in connection with FIG. However, the side guide 308 is not attached to a lateral outer surface of the rail 301 but to a side inner surface of an upwardly opening groove 314 located in the rail head 302.

For precise guidance of a measuring device carrier in the rail longitudinal direction, therefore, a guide system is proposed in which the reference surface for the lateral guidance of the measuring device carrier is the side surface of the rail head. In grooved rails, a side surface in the groove is used as the reference surface. The guide system can be composed of one or more elements. This includes a sliding surface, which allows a linear guide in the rail longitudinal direction along the reference surface. By virtue of this type of guidance, local indentations and elevations of the reference surface have no significant effect on the lateral guidance, provided that the indentations and elevations are distinctly smaller than the length of the contact elements, that is the sliding surfaces. The contact elements are therefore chosen in their length so that the wells have virtually no effect on the tracking more. Sliding surfaces are considered herein as linear if, for example, the ratio of length to width (aspect ratio) is greater than or equal to 3: 1. A guide element has, for example, a minimum length of 20 mm in conventional rails for rail traffic.

The advantage over punctiform contact with the side surface of the rail is that an outwardly curved or periodic unevenness on the reference surface can affect the lateral guidance (periodically) according to the distance of the points of contact. The side guides are rigidly connected to the gauge carrier in the transverse direction of the track. This ensures a fixed reference point of the measuring device carrier and thus of the measuring device attached to the reference surface. In contrast, elastically mounted guide elements have the disadvantage that the lateral reference point is dependent on the force with which the guide element is held on the reference surface. This force in turn may be dependent on unevenness of the reference surface. Thus, the reference point is not clearly definable. The side guides may have a pivotal bearing that permits angular change between the catching axis of the reference surface and the sliding surface. This ensures that the sliding surface abuts the reference surface in as many contact points as possible and / or that the measuring device can also be guided in curves. The rigid in rail transverse direction connection of the side guides on the measuring device carrier is ensured by a rigid axis of the Fagerung. It can also be used a guide without Fagerung. Constant forces keep the side guides on the reference surface. This can be realized for example via a magnetic force. The vertical position of the guide system is kept constant with respect to the rail driving surface. This can be done by further side guides of the guide system or by the measuring device itself.

FIG. 4 shows a modification of the measuring carrier 101 shown in FIG. The side guides 107, 108 are each provided with two rollers 401 to 404, which relieve the contact elements. The rollers 401 to 404 can be resiliently mounted, even be resilient or elastic or an elastic coating to have. They can be designed to reduce the contact pressure of the contact strips partially or completely. Figure 5 shows the modification made in cross-section based on Figure 2, wherein the contact strip 206 is performed separately from the side guide 108 and how the permanent magnet 204 on the side guide 108, the permanent magnet 204 to the rail 101 back shielding, is attached.

If the very high precision of the side guide in the one shown in Figures 1 and 2 is not the focus and the lowest possible frictional resistance is sought, the sliding surface of the guide elements by a (en) roller, roller conveyor, or caterpillar Mechanism can be supplemented (or even replaced). In addition, a pivotal connection as stated above is also advantageous in other than linienformigen contact surfaces, such as only when using rollers.

Claims

CLAIMS:

1. instrument carrier for measuring a laid rail with a carrier profile, two spaced-apart side guides and two coupling elements, wherein

the carrier profile is rigid, extends in a longitudinal direction and is designed to slide longitudinally on top and along the rail,

each of the two Seitenfuhrungen is formed for lateral abutment with the rail and having a longitudinally extending in the carrier profile, line-shaped contact strip, which is designed as a contact to the rail, and

each of the two coupling elements rigidly or rotatably connects one of the side guides to the carrier profile.

2. Instrument carrier according to claim 1, wherein the contact strip of each of the two Seitenfuhrungen is formed as a linear slide bearing.

3. measuring device carrier according to claim 1 or 2, wherein the contact strip in the longitudinal direction of the carrier profile has a length which is such that lateral unevenness of the rail are compensated.

4. Instrument carrier according to one of the preceding claims, wherein the contact strip in the longitudinal direction of the carrier profile has a length which is at least three times its width in the vertical direction.

5. Measuring device carrier according to one of the preceding claims, wherein the two side guides each having a permanent magnet, which is adapted to pull the lateral guides with lateral force on the rail, the lateral guides on the rail with magnetic force to the rail.

6. Instrument carrier according to claim 5, wherein the magnetic force is adjustable.

7. A measuring device carrier according to one of the preceding claims, wherein each of the two side guides comprises an electromagnet which is adapted to pull the side guides with magnetic force to the rail at lateral abutment of the side guide on the rail.

8. Measuring device carrier according to one of the preceding claims, each of the two coupling elements rotatably connects one of the side guides with the carrier profile and has an axis of rotation in the vertical direction.

A meter carrier according to any one of the preceding claims, wherein the side guides are spaced at least three times their own lengths.

10. A measuring device carrier according to one of the preceding claims, wherein the side guide each have two or more spaced-apart rollers.