CZ2001500A3 - Device for grinding rails - Google Patents

Abstract

A machine for grinding railtrack profiles has a support frame (5) from which are suspended two grinding heads (15) angled to each other. Each end of the frame is supported on the track by a pair of conical guide wheels (7). The conical sides of the wheels are aligned with the grinding heads and the frame can be tilted in either direction to shape the profile of the track.

Description

(57)

The rail grinding device (1) of the rail (3) has a support frame (5), which is at the end sides, in each case in the longitudinal direction of the rails (2), spaced from the picking rollers (7) spaced apart from each other. 15) support or roll on rail (2). The support frame (5) is formed rotatably about a pivot axis (26) provided in the longitudinal direction of the rail (2) on the basis of the pivot drive (33). On the support frame (5) are provided two grinding devices (15) which are arranged opposite each other in the transverse direction of the rail (2) between pairs (43) of the scanning rollers (7). The grinding surface (25) of the grinding device (15) is arranged parallel to one of the two associated pickup rollers (7) at its contact points (21) with the rail (2) abutting the grinding plane (23). The contact lines (42) formed by a plurality of contact points (42) of two transverse direction of the rail (2) of the mutually opposed sensing rollers (7) form an angle (24) with respect to each other, which is between 40 ° and 140 °.

(21) Document number:

2001-500 (13) Document type: A3 (51) Int. Cl. ⁷ ;

E01B 31/17

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Equipment for rail grinding last_techniky

BACKGROUND OF THE INVENTION The present invention relates to a device for grinding rails of a rail with a support frame, which has a grinding device which can be adjusted relative to the rail and which is supported at both ends by longitudinally spaced track pulleys to each side of the grinding device wherein the grinding surface of the grinding device is arranged parallel to one of the two associated pickup rollers at its contact points with the rail abutting the grinding plane, and wherein the support frame is pivotally formed on the pivot drive about a pivot axis provided in the longitudinal direction of the rail.

P2terminal_flows

Such a rail grinding device is already known from EP 0 743 395 B1. The support frame of the device bears on the ground rail by means of picking rollers, which at the same time serve as copying rollers for the grinding device. This grinding device is in the form of a pot disc which rotates about an axis arranged perpendicular to the longitudinal direction of the rail which is controlled by the motor and which is adjustable relative to the rail. The support frame is connected at both its longitudinal ends to the aggregate frame by means of a pivot axis formed by a shaft and provided in the longitudinal direction of the rail, said aggregate frame having guide rollers adapted for rolling on the rail. Due to this pendulum drive, the support frame is hinged relative to the aggregate frame around the pivot axis in the region of a flange of 180 °. When grinding the horizontal running surface of the rail, the device rests on the rail by means of the pick-up rollers and is manually • reciprocated back and forth. For grinding both. the rail head or rail side surfaces, the support frame, including the grinding mechanism and pick-up rollers, swivels up to 90 ° laterally, leaving the aggregate frame vertical and rolling on the rail now via the guide rollers. The spring-loaded thrust element ensures the necessary thrust pressure of the grinding device on the lateral surfaces of the rail head.

Another rail-grinding device disclosed in EP 0 665 332 B1 also has a support frame with a grinding device which is supported on sensing and / or copying rollers with a grinding device which can be pivoted about 90 ° in the longitudinal direction of the rail. to the inside of the ground rail. In the fully retracted position of the device, the guide rollers with a flange serve to prevent the support frame from slipping out of the rail. Only the running surface and the inner edge of the rail head or the inner side of the rail can be machined with this device.

DE 17 27 118 U1 further describes a device in which the scanning rollers or the copying rollers of the support frame have a large flange on one side. This allows the support frame to be tilted 90 ° laterally with respect to one side of the rail, while the flange of the pickup rollers keeps the device on the rail.

In the grinding machine known from US 5,303,514, a similar effect is obtained in that each sensing roller is associated with an additional roller, the axis of which is perpendicular to the axis of the scanning roller and which captures the weight of the device during lateral pivoting.

In DE-PS 11 54 496, a tilting support frame of a rail grinding device which is supported on an aggregate frame is always disclosed on both sides by 90 degrees from a vertical position. It is provided on the end sides with two guide rollers, which

ré at an angle relative to each other at both sides of the rail head, oblique downwards and prevent the frame from slipping laterally.

The nature of the finding

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device of the kind described at the outset, by means of which it is possible to achieve faster progress in working with simultaneously extended possibilities of use.

According to the invention, this object is achieved by a device of the kind described at the outset by providing two consecutive pairs of transversely arranged transverse picking rollers arranged opposite one another in the longitudinal direction of the rail as well as two pairs of picking rollers arranged opposite each other. In the transverse direction of the rail, the grinding means are opposed to each other, wherein in each case a contact line formed by a plurality of contact points formed by two contact transversely arranged transverse rails of the mutually opposed picking rollers forms an angle of between 40 ° and 140 °.

This embodiment of the invention provides the advantage that since each grinding device is associated with its own two pickup rollers and these act as copying rollers, it is reliably ensured that the rail head profile is optimally re-profiled, wherein the grinding device is located on the surface of the rail head during the transverse swing of the support frame. In connection with said swiveling, the particular advantage is created, particularly when using two grinding devices, that a slight swiveling angle is now sufficient on the substrate in the angular shape of the positioned grinded surfaces, so that the entire rail head can be re-profiled from one side surface to the other. In the embodiment in which the contact lines jointly form an angle of about 90 ° to each other, this pivot angle is always only 45 ° to one side or the other, which makes it possible to dimension the pivot drive more advantageously and also to increase the working speed. In addition, the arrangement of the two contact lines at an angle to each other also has the advantage that the device is guided particularly reliably on the rail, or if the pivoting of one of the two pick-up rollers is prevented from sliding off the device from the rail head.

A further advantageous embodiment according to claim 2, and in particular in connection with the feature of claim 3, has proved to be very advantageous in grinding reload overflows, since the sensing rollers can now roll on both sides or on both sides of the overflow on the rail head profile without touching rolling or deflection. The device according to the invention is also very advantageously suitable for grinding weld joints, since the pairs of sensing rollers are spaced apart in the longitudinal direction of the rail and roll on both sides of the weld spot on the rail head profile so that it is possible to grind the weld exactly .

Further advantages of the invention result from the other dependent claims and the drawings.

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The invention is explained in more detail below by way of example with reference to the drawing.

FIG. 1 is an oblique view of a rail grinding device constructed in accordance with the present invention, for clarity not all parts being shown completely;

FIGS. 2 and 3 show a very schematic view in longitudinal direction of the rail of the pick-up rollers and the grinding device in various operating positions. FIG.

The_execution_of_execution

The device 1 shown in FIG. 1 is adapted for grinding the rails 2 of the rail 3 and is arranged as a working unit on a rail-working machine 4 which is movable on the rail 3 and is shown only in simplified form. This machine can be designed in a variety of ways, for example as a conventional self-propelled grinding machine, or also as a track-building machine with additional various working units. Likewise, a plurality of devices 1 may be provided on a single machine 4 for machining the track in the longitudinal direction of the rails 2 in succession above the rails 2 of the rail 3.

The device 2 has a support frame 5, which is arranged in the longitudinal direction of the rail 2 and bears in its operating position shown in FIG. 1, or is rolled by means of sensing rollers 7 which are mounted two each at each of the two ends. The support frame 5 and in terms of the transverse direction of the rails are opposed to one another. The two sensor rollers 7, which are arranged at the same end 6 of the support frame 5, are fixed together in a roller holder 8, which is always connected to guide posts 9 arranged perpendicular to the longitudinal direction of the collector 2. On these guide posts 9, the support frame 5 is displaceably supported and driven relative to the slide rollers 7, i.e. to the rail 2, by means of displaceable drives 10, which can be adjusted in an adjustable manner.

The two sliding drives 10 are synchronized with each other and, like the other drives described below, are remotely operable.

Furthermore, the support frame 5 has on its upper side two horizontal guide rods 11, which are arranged in the transverse direction of the frame at a distance from each other and in the longitudinal direction of the rail 2, at 99 ° φ φφ ···· · · · · · Φ • · e e e e * * * 9 9 9 9 9 9 9 9 9 9 9 9 9 9 The sliding carriage 12 is mounted thereon. These are slidable on the drive 13 along the guide rods 11. The sliding carriage 12 is connected under the support frame 5 to an angle bracket 14 on which are mounted two grinding devices 15, which are arranged as in in the longitudinal direction as well as in the transverse direction of the support frame 5 at a distance from one another. The grinding devices 15 opposite each other in the transverse direction of the rail 2 are each provided with one rotating grinding wheel 16 and one grinding wheel drive 17.

As can also be seen more clearly from FIG. 2, the sensing rollers 7 are each in the form of a truncated cone, both of which are mutually opposed to the transverse direction of the rail 2 of the opposite sensing rollers 7 of each of the two The pairs 43 face each other with a smaller end surface 18 and are mounted perpendicular to the longitudinal direction of the rail 2 provided by the shaft 19 and are thus rotatable about a common axis of rotation 20. In this case, said end surfaces 18 are spaced apart from one another in the longitudinal direction of the axis of rotation 20 and the two pickup rollers Z are pivotable independently of one another on the shaft 19. The corresponding contact point 21 of the pickup roller 10 with the rail 2 or a contact line 42 which is formed perpendicular to the longitudinal direction of the rail 2 by means of a plurality of these contact points 21, or in the abrasive plane 23 formed in the contact line 42, both formed in the transverse direction of the support frame 5 or the transverse direction of the rail 2 opposite the contact lines 42 form an angle 24 with each other which is between 40 ° and 140 °, preferably about 90 °, as shown in the drawing. The two grinding units 15 or their grinding wheels 16 each form a grinding surface 25 which is parallel to the grinding plane 23 formed by the contact lines 42. By means of the sliding drive 10, the grinding surfaces 25 are adjustable perpendicular to the grinding plane 23 until they reach the grinding plane. · • Φ

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Not the abrasive surface 25 after grinding overlapping overflows 40 or the like exactly to the abrasive plane 23.

The support frame 5 is pivotable at each of its two ends 6 about a pivot axis 6 arranged in the longitudinal direction of the rail 2, or is connected via this pivot axis 26 to a connecting rod 27, the opposite end 28 of which is articulated with the machine 4 The connecting rod 27 consists of two telescopically retractable parts 30, 31, which are biased towards each other in a predetermined position on the basis of a pressure element 37 in the form of a centering spring 32. On the supporting frame 5 of the connecting part 30 of the connecting rod 27 is further articulated a pivot drive 33 in the form of a roughly parallel hydraulic cylinder, the free end 36 of which is connected to a connecting point 34 which is arranged on the supporting frame 5 and spaced apart The roughly vertically directed lift drive 35 is provided between the portion 31 of the connecting rod 27 and between the machine frame 29 of the rail processing machine 4 and is articulated at both ends.

In a business setting, the device 2 ^{on the} basis of the lifting drive 35 puts the rollers sriímacími] _ on the rail 2 and slightly pressed onto it. The centering spring 32 is released and the pivoting drive 33 is in its zero position, whereby the support frame 5 is centered centrally above the rail 2 or the rail head 22, respectively. In this position shown in FIG. 2, the edges are first ground. 39 of the rail 2, the device 2 abutting only the edges 39 of the rail 2 via the contact points 21. By means of the sliding drives 10, the grinding wheels 16 of the grinding devices 11 form the abrasive base of the pair 43 2 until the abrasive surface 25 is aligned with the abrasive plane 23 formed by the contact lines 42.

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The grinding performance can then be increased by superimposing the reciprocating movement forward and back by grinding means 15 on the basis of the drive 13.

In such a case where the rail head 22 has a overflow overflow 40, it must first be removed before the rail head 22 can be profiled. This situation is illustrated in FIG. the support frame E5 is pivoted by 45 ° under the action of the lifting drives 33 and the sensing rollers ^{20 are} positioned above the ^reloading overflow 40 or on both sides thereof. By spacing the end faces 18 of the pickup rollers 7 spaced apart from each other, a recess is formed in which the reload overflow 40 finds its place. The corresponding grinding device 15 is adjusted back to the point where the grinding wheel 16 directly touches the reloading overflow 40, which is ground in the plane up to the grinding plane 23. Also grinding the running surface 38 of the rail 2 and, if necessary, the side surfaces 41 of the head 22 the rail 2 takes place in this position of the device 1.

With said lateral pivoting of the support frame 5 by 45 °, the sensing rollers 7, or the entire device 1, tend to slide by means of a low contact pressure on the head side 22 of the rail 2. This is counteracted by a centering spring 32, which is tensioned by displacement of the support frame 5 and tries to move the support frame 2 back into the centered position 2 above the rail 2, thus creating a corresponding pressing pressure on the side surface 41 of the rail head 22.

Alternatively to the reciprocating movement of the grinding device 15 back and forth on the drive 13, it would also be possible instead to move the entire device 2 cyclically forwards and backwards by means of the sensing rollers T on the rail 2. Another alternative to an exemplary embodiment known in the art.

9, the sensing rollers T are not formed in the form of a truncated cone but as cylindrical sensing rollers. The two pickup rollers 43 of each pair 43 would then not be arranged on a common shaft 19 or axis 20 of rotation, but would rotate on separate pivot axes that would form an angle 24 relative to each other and which would be parallel to the contact line 42 corresponding to the pickup pulleys ·_ ·

Claims (6)

PATENT CLAIMS A device for grinding rails (2) of a rail (3) with a support frame (5), which has an adjustable grinding device (15) relative to the rail (2) and which is at the end sides always in the longitudinal direction of the rails (2) spaced-apart scoring rollers (7) spaced from each other of the grinding device (15) on the rail (2) can be supported or rolled, the grinding surface (25) of the grinding device (15) being arranged parallel to one of the two associated scoring rollers (7) ) at its contact points (21) with the rail (2) contacting the abrasive plane (23) and wherein the support frame (5) is rotatably formed on the pivot drive (33) about a pivot axis (26) provided in the longitudinal direction of the rail (2) ), characterized in that two pairs (43) arranged one behind the other in the longitudinal direction of the rail (2) in relation to the transverse direction of the rail (2) are the abutment pickup rollers (7) as well as two grinding means (15) opposed to one another in a transverse direction of the rail (2) between the pickup roller pairs (43) and the contact lines (21) formed by several contact points (21) 42) of two sensing rollers (7) arranged opposite one another in the transverse direction of the rail (2) form an angle (24) with respect to each other which is between 40 ° and 140 °. Device according to claim 1, characterized in that the sensor rollers (7) arranged at the same end (6) of the support frame (5) each have a frustoconical shape and are always smaller end surfaces (18) to each other. are mounted on a common axis of rotation (20) which is arranged perpendicular to the longitudinal direction of the rail (2) and are pivotable independently of one another. Device according to claim 2, characterized in that the end faces (18) of the scanning rollers (7) facing each other are spaced apart in the longitudinal direction of the axis of rotation (20). Device according to one of Claims 1 to 3, characterized in that the pivoting actuator (33) is connected to a thrust element (37), for example in the form of a centering spring (32), which keeps the support frame (5) in an eccentric position. to the rail (2). Device according to one of Claims 1 to 4, characterized in that the grinding means (15) are mounted on the support frame (5) in a longitudinal direction of the support frame (5) or the rail (2) and by means of a drive (13). they are adjusted 1 in the longitudinal direction of the rail (2). Device according to one of Claims 1 to 5, characterized in that the support frame (5) is supported at both ends (G) on guide columns (9) which are connected to the sensing rollers (7) and which are provided perpendicular to the longitudinal direction of the rails (2), and is formed thereon by means of a sliding drive (10) adjustably relative to the pickup rollers (7).