EP3480359B1 - Rail construction device for machining grooved rails - Google Patents

Description

The invention relates to a track construction device for processing grooved rails.

From the general state of the art it is known to subject rails or rail parts to a machining process by means of corresponding processing devices, in order, for example, to rework weld seams or the like during track construction.

Furthermore, it is known to use different rail profiles, so-called grooved rails having proven particularly useful in inner-city tram traffic. Grooved rails are generally provided with corresponding water tanks at larger intervals, which collect the water entering in the area of the groove and feed it into the sewer system. In order to allow the water to run off at the bottom of the grooved rail, it has hitherto been customary either to drill holes in the bottom of the grooved rail using a drill or to burn corresponding slots in the groove using a welding torch.

However, such procedures are disadvantageous. For example, the holes made by means of a drill can become clogged with leaves or debris, so that the water cannot run off in the area of the grooved rail. The processing of a grooved rail by means of a welding torch leads to a change in the metal structure so that, for example, at low temperatures in the area of such slots, track breakage can occur.

In addition to the hand-held devices described so far, special devices have often been described in the prior art for processing rails, which are intended to enable easier processing.

So is already out of the CH 40 417 A a machine for processing rail head surfaces in the track with a tool carrier moving on a lead screw is known, the tool carrier being mounted on the lead screw and the rods, the lead screw and rods being held parallel to each other in two vertically adjustable head pieces mounted in guide frames.

From the DE 889 457 B A lift-off superstructure device for machining base plates for rails by milling with the superstructure ready for driving is known, which has a milling device which is mounted on a frame to be placed on both sides of the rail so that it is longitudinally and vertically displaceable, the milling device being equipped with two milling disks which are mounted in such a way that they can mill material out of the fastening means holding them on both sides of the rail.

The EP 2808446 A1 shows a device for machining a track. A tool bed is provided to which a free-form milling system accommodating at least one machining tool and at least two clamping arms that encompass a machining area are assigned, the clamping arms carrying clamping jaws which are provided with a clamping device for securing the tool bed on a track.

Such devices are only placed on a single rail, so that it is difficult to relocate the device. As soon as the processing point is not accessible from the side, a road-rail excavator would have to be used or another lifting device can be used, which significantly increases the complexity of the machining.

Machining devices that can move on rails are already known from the prior art. So is from the DE 42 00 945 A1 a chassis for rail machining is known, which consists of a wheel arrangement that rolls on the rail head, with grinding or milling machines attacking the rail head from the chassis. The running gear has a main frame on which bogies are arranged on upper and lower pivot bearings at a mutual distance from guide trolleys with main support rollers and lateral guide rollers and, starting from the main bogies on pull-out trolleys, rollers are arranged opposite the guide trolleys in a roller arrangement.

From the EP 2 412 871 B1 a device for the material-removing processing of laid rails in the track with a rail-bound, a chassis and at least two axles with at least two rail tires each having carrier vehicle and at least one arranged in the carrier vehicle, a processing tool for material-removing processing of a rail having processing device is known.

It is also known from the prior art to machine grooved rails with appropriate devices. So is in the DE 10 2007 060 215 A1 a device for machining a running edge or a head of grooved rails is known which has a milling device with at least one milling head rotating about a substantially vertical axis, which is designed as a contour milling cutter for milling the running edge

FR-A-2783446 discloses a track construction device for processing grooved rails, with a processing unit which can be fixed to the grooved rail via a retaining clamp, the processing unit having a base body, with respect to which a milling device can be displaced in three mutually perpendicular spatial directions, so that a cutting device can be machined by means of a milling head of the milling device Machining of the grooved rail for milling an elongated hole in the bottom of the grooved rail can be carried out.

On the basis of this prior art, the inventor has now set himself the task of creating a track construction device which enables an improved processing of grooved rails.

This object is achieved by the features of claim 1. Further advantageous refinements of the invention are each subject matter of the subclaims. These can be combined with one another in a technologically sensible way. The description, in particular in connection with the drawing, additionally characterizes and specifies the invention.

According to the invention, a track construction device for processing grooved rails is provided which has a frame which is provided with a first pair of wheels which can be arranged along a first grooved rail and a second pair of wheels which can be arranged along a second grooved rail, with one between the first pair of wheels Machining unit is fastened adjustable relative to the first grooved rail via swivel arms on the frame so that it can be brought down onto the grooved rail, and can be fixed to the first grooved rail via holding clamps arranged on the machining unit, the machining unit having a base body, with respect to which a milling device in three to each other perpendicular spatial directions is displaceable, so that by means of a milling head of the milling device, machining of the rail, in particular milling of an elongated hole in the bottom of the grooved rail, can be carried out.

The solution according to the invention is characterized in that the track construction device is designed to be movable on the rails by means of the pairs of wheels. Accordingly, the position at which the milling head of the milling device can perform machining of the rail can be freely selected by shifting on the rails. The track construction device can therefore typically be moved by the operator without external aids, so that a large number of processing points that are arranged at a certain distance from one another can also be processed. In particular, when milling elongated holes in the bottom of grooved rails, such processing points will be present at distances from one another, only at predetermined positions water tanks are arranged below the grooved rail. After a processing point has been reached, the processing unit can by means of the holding clamps be set on the first rail, so that the position can be selected exactly by moving the milling head, for example above the water tank. For this purpose, the processing unit must be displaceable in all three spatial directions, so that the milling head then typically has to be displaced in only one direction from a starting point to an end point in the longitudinal direction of the first rail to form the elongated hole, with the milling head moving lower after the end point has been reached can be effected. By defining the machining unit, precise machining of the rail is thus possible. A suitable choice of milling head also enables hardened rails to be machined. The milling device can be provided with an optionally exchangeable end mill, so that machining can be carried out on the bottom of a grooved rail or in a center piece of a switch. The axial length of the end mill can be selected so that the machining point on the bottom of the grooved rail or in the heart of the switch is reached without the milling head touching down on the top of the rail. In addition to milling an elongated hole in the bottom of a grooved rail, z. B. milling out cracks at the heart of points is possible.

According to one embodiment of the invention, the frame is designed in two parts with a first sub-frame and a second sub-frame, so that the first pair of wheels can be offset against the second pair of wheels perpendicular to a direction of travel. The second sub-frame can be inserted into the first sub-frame transversely to the longitudinal direction.

Accordingly, the distance between the first pair of wheels and the second pair of wheels can be varied, so that the track construction device can be used variably for different track widths. By inserting the second sub-frame into the first sub-frame, for example by means of telescopic insertion frame segments with different dimensions, an adjustment can now be made when machining rails in standard, meter or broad gauge. For this purpose, cutouts can be provided at discrete positions on the second subframe, for example, which can be brought into overlap with corresponding cutouts on the first subframe, so that the desired standardized track width can be set by means of a guide bolt or the like. In yet other embodiments, the track width can also be continuously adjustable.

According to a further embodiment of the invention, the first sub-frame comprises the first pair of wheels and an articulated receptacle for the pivot arms. A platform can be formed over the first sub-frame.

This procedure makes it possible to carry out the adjustability of the track width described above in such a way that, on the one hand, the orientation of the processing unit relative to the first rail is maintained and, on the other hand, any objects above the wheels that may be arranged on a platform are not affected by the track change with regard to their position . In this way, a lane change can be carried out relatively easily without individual components of the device having to be realigned.

According to a further embodiment of the invention, a storage container is arranged on the frame, via which a cooling fluid, in particular water, can be fed to the milling head.

The milling head is cooled by means of the cooling fluid, so that the service life of the milling cutter is significantly increased compared to uncooled use. The cooling fluid can be set up accordingly via a Reservoirs are only fed by the influence of gravity, but also by means of a pump specially designed for this purpose. The amount of cooling fluid supplied can be adjusted by means of a suitable throttling, for example by means of a valve or some other cross-section-changing device. The storage container is advantageously arranged on the platform, but can also be connected directly to the frame.

According to a further embodiment of the invention, a power unit is arranged on the frame, which enables an electrical supply to at least the milling device.

The power unit equipped, for example, with an internal combustion engine makes it possible to create a power supply at least for the milling device independently of a mains connection. Other electrical consumers, for example a lighting device for night construction sites or other processing devices, can of course also be operated via the power unit. The generator set is in turn advantageously arranged on the platform, but a direct connection to the frame is also possible.

According to a further embodiment of the invention, the holding clamps are designed to be magnetic. The holding clamps can be designed to be adjustable with respect to their position in relation to the frame.

Magnetic retaining clips enable the machining unit to be reliably fixed with respect to the first rail. In order to adjust the track construction device with regard to the relative position before the first machining operation, it may be necessary to make the holding clamps adjustable. This is the case, for example, with a recessed profile rail with a high asphalt overhang to move the retaining clamp on the top further towards the middle of the rail so that it is directly connected to the rail.

According to a further embodiment of the invention, the movement in the three spatial directions can be carried out by means of mechanical spindle drives.

Thus, both the advancement of the milling head and the positioning of the milling head relative to the first rail can be carried out by means of spindle drives, so that no complex controls are necessary, as would be required, for example, by means of adjustability by servomotors. This procedure also enables intuitive operation by a user.

According to a further embodiment of the invention, the first pair of wheels and / or the second pair of wheels have a profiled design on their running surfaces.

Accordingly, easy relocation of the track construction device is possible, since the track construction device is cast into the rails by means of profiled running surfaces.

Fig. 1

eine erfindungsgemäße Gleisbauvorrichtung in einer perspektivischen Seitenansicht,

Fig. 2

eine weitere Seitenansicht der Gleisbauvorrichtung aus Fig. 1,

Fig. 3

die Gleisbauvorrichtung aus Fig. 1 in einer Draufsicht,

Fig. 4

ein Detail der Gleisbauvorrichtung aus Fig. 1 in einer Seitenansicht,

Fig. 5

ein weiteres Detail der Gleisbauvorrichtung aus Fig. 1 in einer weiteren Seitenansicht.

Some exemplary embodiments are explained in more detail below with reference to the drawing. Show it:

Fig. 1

a track construction device according to the invention in a perspective side view,

Fig. 2

a further side view of the track construction device Fig. 1 ,

Fig. 3

the track construction device Fig. 1 in a plan view,

Fig. 4

a detail of the track construction device Fig. 1 in a side view,

Fig. 5

another detail of the track construction device Fig. 1 in another side view.

In the figures, identical or functionally identical components are provided with the same reference symbols.

In Fig. 1 a first embodiment of a track construction device 2 is shown below. The track construction device 2 comprises a frame 4, on the underside of which a first pair of wheels 6 is arranged. The first pair of wheels 6 can be moved along a first rail 8, so that the track construction device 2 can be moved to a processing point. In the in Fig. 1 The example shown, the first rail 8 is designed as a grooved rail, as is typically done with tram rails. The frame 4 can be designed on its upper side with a platform 10 so that further objects can be placed on the track construction device 2. Contrary to the representation in Fig. 1 the platform 10 can also completely cover the frame 4. The track construction device 2 also has a processing unit 12 which is connected to the frame 4 via pivot arms 14. The machining unit 12 comprises a milling device 16, the milling head 18 of which is designed, for example, in the form of an end mill.

The machining unit 12 can be pivoted relative to the frame 4 via the pivot arms 14, so that after the machining unit 12 has been lowered Contact between an upper side of the first rail 8 and retaining clips 20 occurs. The holding clamps 20 thus serve to fix the machining unit 12 on the upper side of the first rail 8.

By means of several spindle drives, the function of which will be explained in more detail below, the machining unit 12 can now be moved in all three spatial directions with respect to the first rail so that, for example, an elongated hole can be milled in the bottom of the grooved rail 8 using the milling head 18. The milling device 16 is typically driven by means of an electric motor, a power unit 22 which can supply the milling device 16 with electrical energy is preferably arranged here on the track construction device 2.

The track construction device is in Fig. 2 again shown in a further side view in such a way that the processing unit 12 emerges more clearly. It can be seen that the processing unit 12 is connected to the frame 4 via the pivot arms 14. The machining unit 12 also has a base body 24 on which the two holding clamps 20 are arranged at a distance in the longitudinal direction with respect to the first rail 8. The area between the two holding clamps 20 can thus be used as a machining area for the milling device 16.

Accordingly, the machining unit 12 is lowered onto the first rail 8 via the pivot arms 14. For this purpose, for example, a not in Fig. 2 Lever mechanism illustrated be provided. In the example shown, the two holding clamps 20 are designed as permanent magnets, which can be removed again from the top of the first rail 8 via toggle levers 26 arranged on the side. For this purpose, the rocker arms 26 can be provided with suitable cams or the like.

The milling device 16 can be displaced relative to the base body 24 along the longitudinal direction of the first rail 8 via a first spindle drive 28, which can be driven with a first handwheel 30. The milling device 16 can be displaced along the axial direction of the milling head 18 via a second spindle drive 32, which is provided with a second handwheel 34. A third spindle drive (not in Fig. 2 shown), is used to move the milling device 16 in a direction perpendicular to the two just described. As soon as the milling device 16 comes to rest over a processing point, the handwheel 30 can be used to shift between the start and end points of a milling line. The milling depth is determined by means of the handwheel 34. Thus, by alternately adjusting the handwheels 30 and 34 successively between the starting point and the end point, an elongated hole can be milled, for example, in the bottom of the grooved rail. In order to make the milling head 18 more stable, it can be supplied with a cooling fluid, for example water, via a storage container (not shown).

In Fig. 3 the track construction device 2 is shown again in a top view, the power unit 22 and the platform 10 not being shown here for reasons of clarity. It can be seen that the base body 24 is articulated to the frame 4 via the pivot arms 14. In the example shown, the frame 4 is divided into two parts along the dividing line 36, so that the second sub-frame 40, which is provided with a second pair of wheels 38, can be displaced relative to a first sub-frame 42 transversely to a direction of travel of the track construction device 2 by the distance of the first pair of To be able to configure wheels 6 to the second pair of wheels 38 depending on the track width used. The processing unit 12 and the pivot arms 14 are assigned to the first sub-frame 42, so that when changing over to a different track width no readjustment with respect to the first sub-frame 42 has to be made.

In Fig. 4 the area between the holding clamps 20 is shown again in an enlargement. It can be seen that the milling head 18 can be designed for milling elongated holes, for example. In yet other embodiments, however, it is also conceivable, for example, to mill out cracks in the frogs of points by means of the milling head 18 for repair purposes.

The main field of application of the track construction device 2 according to the invention, however, relates to the milling of elongated holes in a floor 44 of a first rail 8 designed as a profile rail, as described with reference to FIG Fig. 5 is explained again in more detail. In Fig. 5 a detail view that follows the longitudinal direction of the first rail 8 is selected. The viewing direction is as in Fig. 1 represented by the reference symbol V. After the machining unit 12 comes to rest on the first rail 8 by means of the retaining clips 20, the milling device 16 is now positioned via a spindle drive 48 that can be driven with a third hand rim 46 so that the milling head 18 is aligned exactly above the floor 44 of the first rail 8 . By means of the second handwheel 34, the milling device 16 can now be guided in the direction of the first rail 8 so far that the milling head 18 begins machining on the bottom 44 of the first rail 8. By shifting the first rail 8 along the longitudinal direction, for example by means of the first handwheel 30, as in FIG Fig. 2 described, the step-by-step processing of the bottom 44 is now carried out until the elongated hole is completed along the desired dimensions.

The track construction device 2 according to the invention enables easy relocation by railing in the first pair of wheels 6 or the second pair of wheels 38. The track construction device 2 according to the invention is designed to be movable on the first rail 8 and a second rail not shown in the figures. By turning the track construction device 2 according to the invention over, the second rail can also be subjected to machining, since the machining unit 12 then comes to rest over the second rail.

List of reference symbols:

2

Track construction device

4th

frame

6th

first pair of wheels

8th

rail

10

platform

12th

Machining unit

14th

Swivel arms

16

Milling device

18th

Milling head

20th

Retaining clips

22nd

Generator set

24

Base body

26th

rocker arm

28

first spindle drive

30th

first handwheel

32

second spindle drive

34

second handwheel

36

parting line

38

second pair of wheels

40

second sub-frame

42

first sub-frame

44

ground

46

third hand edge

48

third spindle drive

Claims (12)

1. Track construction device for machining grooved rails (8), which device has a frame (4) which is provided with a first pair of wheels (6) that can be arranged along a first grooved rail (8) and a second pair of wheels (38) that can be arranged along a second grooved rail, wherein a machining unit (12) is fastened via pivot arms (14) to the frame (4) between the first pair of wheels (6) so as to be adjustable relative to the first grooved rail (8), such that said unit can be lowered onto the grooved rail (8), and can be secured to the first grooved rail (8) via holding clamps (20) arranged on the machining unit (12), wherein the machining unit (12) has a milling device (16) and a main body (24) with respect to which the milling device (16) can be moved in three spatial directions arranged perpendicularly to one another such that machining of the grooved rail (8) can be carried out by means of a milling head (18) of the milling device (16) in order to mill a slot in the base (44) of the grooved rail (8).
2. Track construction device according to claim 1, wherein the frame (4) is designed in two parts, with a first partial frame (42) and a second partial frame (40), such that the first pair of wheels (6) can be moved toward the second pair of wheels (38) perpendicularly to a direction of travel.
3. Track construction device according to claim 2, wherein the second partial frame (40) can be inserted into the first partial frame (42) transversely to the longitudinal direction.
4. Track construction device according to either claim 2 or claim 3, wherein the first partial frame (42) comprises at least the first pair of wheels (6) and an articulated receptacle for the pivot arms (14).
5. Track construction device according to any of claims 2 to 4, wherein a platform (10) is formed at least above the first partial frame (42).
6. Track construction device according to any of claims 1 to 5, wherein a storage container is arranged on the frame (4), via which container a cooling fluid, in particular water, can be fed to the milling head (18).
7. Track construction device according to any of claims 1 to 6, wherein a power unit (22) which allows an electrical supply at least to the milling device (16) is arranged on the frame (4).
8. Track construction device according to any of claims 1 to 7, wherein the holding clamps (20) are magnetic.
9. Track construction device according to any of claims 1 to 8, wherein the holding clamps (20) are designed to be adjustable with respect to their position in relation to the frame (4).
10. Track construction device according to any of claims 1 to 9, wherein the machining unit (12) can be moved in the three spatial directions by means of mechanical spindle drives (28, 32, 48).
11. Track construction device according to any of claims 1 to 10, wherein the first pair of wheels (6) and/or the second pair of wheels (38) are profiled on the running surfaces thereof.
12. Track construction device according to any of claims 1 to 11, wherein the milling device (16) is designed with an optionally replaceable end mill such that machining can be carried out on the base (44) of a grooved rail (8) and in a frog of a switch.

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