Patent Application
20070022898
The invention relates to a machine for transporting and laying track switches on a ballast bed. The machine has a switch carrier with cable winches and fastening devices for connection to the track switch, and the switch carrier is supportable at each end by way of a respective on-track undercarriage and crawler track on a track or a ballast bed. The invention also pertains to a related method.
A machine for the transport of track switches and the laying thereof upon a ballast bed is known from the commonly assigned U.S. Pat. No. 4,249,467. At each end of a switch carrier supporting the track switch, two on-track undercarriages and a crawler track are connected to the switch beam.
Further machines of a similar type are also known from German published patent applications DE 23 13 055, DE 34 19 205, French published patent application FR 2 325 765 and German published patent application DE 34 19 240.
It is accordingly an object of the invention to provide a machine and a method for transporting track switches which overcome the above-mentioned disadvantages of the heretofore-known devices and methods of this general type and which provides for a machine of the specified kind with which more versatile working operations are possible while taking into account different construction site conditions.
With the foregoing and other objects in view there is provided, in accordance with the invention, a machine for the transport of track switches and the laying thereof upon a ballast bed. The novel machine comprises:
a switch carrier having cable winches and fastening devices for connection to the track switch;
an on-track undercarriage and a crawler track disposed to support the switch carrier on a track and on a ballast bed, respectively;
a common undercarriage frame connecting the on-track undercarriage and the crawler track to one another;
the switch carrier having a carrier mid-section, connected with the cable winches, and two carrier end-sections each articulated at one end of the carrier mid-section by way of a respective carrier joint each defining a carrier axis;
each of the two carrier end-sections being pivotable relative to the undercarriage frame about an undercarriage axis, extending parallel to and spaced from the carrier axis defined by the carrier joint, by way of a rotation drive.
With the above and other objects in view there is also provided, in accordance with the invention, a machine for the transport of track switches and the laying thereof upon a ballast bed, wherein the machine comprises:
a switch carrier having fastening devices for connection to the track switch;
an on-track undercarriage and a crawler track disposed to support each end of the switch carrier on a track and on a ballast bed, respectively;
a common undercarriage frame connecting the on-track undercarriage and the crawler track to one another;
the switch carrier having a carrier mid-section, connected with the track switch, and two carrier end-sections each articulated at one end of the carrier mid-section by way of a respective carrier joint each defining a carrier axis;
each of the two carrier end-sections, for common pivoting with the carrier mid-section and the track switch, being mounted on the undercarriage frame for pivoting about a pivot axis extending in a longitudinal direction of the carrier and connected to a pivot drive.
In an advantageous manner, a configuration of this kind enables both a transporting of the switch from the manufacturing plant to the construction site and the laying of the switch upon the ballast bed, without requiring the use of special gantry cranes or the like. Owing to the three-part design of the switch carrier and the possibility of swinging the end parts thereof outwardly, a problem-free laying down of switches is assured even on construction sites where space is constrained, for example in tunnels.
In accordance with an added feature of the invention, each the carrier end-section, for pivoting relative to the undercarriage frame about a pivot axis extending in a longitudinal direction of the carrier, is connected to a pivot drive. Preferably, the pivot axis is disposed centrally with respect to an undercarriage axis of the on-track undercarriage.
In accordance with an additional feature of the invention, each carrier end-section is mounted on a pivot support connected to the undercarriage frame for rotation about the undercarriage axis, and the pivot drive is fastened, on the one hand, to the carrier section and, on the other hand, to the pivot support. In a preferred embodiment, the carrier end-section is pivotable about the pivot axis by a pivot angle α of substantially 60°.
In accordance with another feature of the invention, a telescopic drive is mounted in the carrier end-section and configured to distance the carrier joint relative to the undercarriage axis in the longitudinal direction of the carrier.
In accordance with a further feature of the invention, a distance between the carrier axis and the undercarriage axis of the carrier end-section is greater than a distance between the undercarriage axis and a bogie pivot axis of the on-track undercarriage.
In accordance with a preferred implementation of the invention, there is provided a counterweight section elongating the carrier end-section in a direction from the carrier axis and beyond the undercarriage axis. Preferably, there is provided a drive disposed to distance the counterweight section from the undercarriage axis.
In accordance with again an added feature of the invention, a plurality of fastening devices, one following another in the longitudinal direction of the carrier, are each connected to a pair of cable winches. The cable winches are thereby in each case formed with an opening for receiving a centering pin projecting from the carrier mid-section. Preferably, each fastening device is provided with fixing clamps, mounted for displacement in a transverse direction extending perpendicularly to the longitudinal direction of the carrier and including a hook configured to be pushed under a rail of the track switch.
In accordance with again an additional feature of the invention, the crawler track is disposed between two on-track undercarriages.
In accordance with again another feature of the invention, there is provided a drive for vertically adjusting the on-track undercarriage relative to the undercarriage frame.
In accordance with a concomitant feature of the invention, there is provided a vertically adjustable lifting ram for fixing a distance between the carrier end-section and the undercarriage frame.
With the above and other objects in view there is also provided, in accordance with the invention, a method of transporting and laying a track switch. The novel method comprises the following steps:
loading the track switch onto on-track undercarriages into a transport position wherein the track switch is tilted, with respect to a horizontal plane, about a longitudinal axis, and form-fittingly connected to a switch carrier supported at respective ends on the on-track undercarriages;
transporting the track switch to a construction site on the on-track undercarriages;
pivoting the track switch into a horizontal laying position at the construction site;
distancing the switch carrier positioned above the track switch, together with the track switch, relative to the on-track undercarriages in a transverse displacement substantially perpendicularly to the longitudinal direction; and
subsequently lowering the track switch upon a ballast bed with vertical distancing from the switch carrier for laying the track switch.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a machine for the transport of track switches, and method, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
Referring now to the figures of the drawing in detail and first, particularly, to
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The mode of functioning of the machine 1 will now be described in more detail.
For picking up the track switch 2 lying adjacent to the track 34 in the manufacturing plant, the machine 1 is moved in the transverse direction of the track with the aid of the crawler tracks 8, rotated by 90° while the on-track undercarriages 7 are raised, until the switch carrier 3 comes to lie above the track switch 2. Parallel thereto, with the aid of the rotation drives 10—and the pivoting of the carrier end-sections 6, induced thereby—changes in position of the carrier mid-section 4 are always possible for the precise centering of the same above the track switch 2. With actuation of the cable winches 16, the fastening devices 17 or crossbeams 18 are lowered, and the hooks 25 are pushed under the rails 24 and anchored down. Now, the track switch 2 is raised with the aid of the cable winches 16 until the centering pins 22 automatically enter into the openings 21 of each crossbeam 18, and the latter are pressed to an underside of the carrier mid-section 4.
The track switch 2, having thus been braced form-fittingly against the switch carrier 3 in a very simple manner and without any auxiliary operations, is subsequently moved in the transverse direction of the track onto the track 34 by means of the crawler tracks 8 (with the help of suitable ramps). After lowering the on-track undercarriages 7 with the aid of the drives 14, the on-track undercarriages 7 are set upon the track 34 while the crawler tracks 8 are raised. With actuation of the two pivot drives 28, the track switch 2 is pivoted, together with the switch carrier 3, into a transport position inclined by 60° to the horizontal (see
As soon as the construction site intended for placement and installation of the track switch 2 has been reached, the track switch 2 together with the switch carrier 3 is pivoted back into the horizontal laying position (
With actuation of the cable winches 16, the track switch 2 is deposited upon a ballast bed 35, wherein it is still possible at any time to carry out precise position adjustments by means of the rotation drives 10. As soon as the track switch 2 is lying on the ballast bed 35, the hooks 25 are released, displaced transversely on the crossbeam 18 and lifted for insertion of the centering pins 22.
If the final position of the track switch 2 is not directly adjacent to the track 34, the machine 1 can be set down upon the two crawler tracks 8, rotated by 90° while the on-track undercarriages 7 are lifted, and moved in the transverse direction of the track by means of the motive drives 13 until the unloading position has been reached. Parallel thereto, the correct positioning of the track switch 2, particularly in constrained tunnel conditions, can be made significantly easier by suitable actuation of the rotation drives 10.
In order to facilitate the transfer of the machine 1 from the ballast bed 35 to the track 34, the lifting rams 36 are pressed against the carrier end-section 6 (
With the machine 1 according to the invention, an unhindered transport of the switch on a regular track as well as a problem-free laying down of the track switch 2 in its installation position is possible in a particularly advantageous manner, wherein—for changing over from the transporting function to the laying function—no extensive retooling operations or additional auxiliary devices are required. The advantageous use of cable winches 16 notwithstanding, it is possible by means of the centering pins 22 to achieve a very simple, quick and effective connection between the switch carrier 3 and the track switch 2 for the safe transport thereof in an inclined position. At the construction site, the track switch 2 can be lowered immediately, while retooling operations are entirely avoided which are made more difficult and dangerous by the heavy load. During the lowering movement, precise positional corrections for an accurate switch installation are possible at any time by slightly swiveling the carrier end-sections 6. As a result of the simple, form-fitting bracing between the switch carrier 3 and the track switch 2—while avoiding rocking motions that stress the switch and are dangerous due to the heavy load—a problem-free transverse transport from the track 34 to the installation site is assured.
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| Number | Date | Country | Kind |
|---|---|---|---|
| 610/2004 | Apr 2004 | AT | national |
This is a continuing application, under 35 U.S.C. §120, of copending international application PCT/EP2005/050167, filed Jan. 17, 2005, which designated the United States; this application also claims the priority, under 35 U.S.C. §119, of Austrian patent application No. A 610/2004, filed Apr. 7, 2004; the prior applications are herewith incorporated by reference in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/EP05/50167 | Jan 2005 | US |
| Child | 11544494 | Oct 2006 | US |
