The invention relates to a machine for renovating a track composed of rails and crossties and resting on a ballast bed. The machine includes devices for removing old crossties and placing new crossties, an endless excavating chain with a transverse chain segment provided for taking up ballast, and a ballast plow designed for creating a graded support surface for the new crossties. The invention also relates to a method.
A machine of this type is known from U.S. Pat. No. 5,357,867 or U.S. Pat. No. 6,474,241.
It is the object of the present invention to provide a machine and a method of the specified kind with which it is possible to also accomplish without problems especially a vertical lowering of the new track.
According to the invention, this object is achieved with a machine and a method of the specified type by way of the features cited in the claims.
The invention is based on the idea of transporting away, by means of the excavating chain, only a part of the ballast which has to be removed for a lowering of the track. In a simple manner, the residual ballast remaining in the peripheral areas of the track bed is merely displaced by the ballast plow into the shoulder or flank region of the track bed, keeping the transport path very short. This provides the advantage that the excavating chain as well as an adjoining transport path can be of smaller dimensions. The said residual ballast can be used for ballasting the crosstie ends of the newly-laid crossties, requiring only a minimal transport path.
Additional advantages of the invention become apparent from the dependent claims and the drawing description.
The invention will be described in more detail below with reference to an embodiment represented in the drawing in which
A machine 1, of which only a small section is shown in
A front device 7—with respect to a working direction 6—serves for picking up the old crossties 2 which are stored on wagons via suitable transport means.
To the rear of the said pick-up device 7, an endless excavating chain 8 adjustable by drives is connected to a machine frame 9. This excavating chain 8 is composed of a transverse chain segment 12, provided for taking up ballast 10 and extending perpendicularly to a longitudinal machine axis 11 (see
As can be seen in
A V-shaped ballast plow 17 is disposed—with regard to the longitudinal machine axis 11—between the transverse chain segment 12 and a device 16 for placing new crossties 2. A width B—extending perpendicularly to the longitudinal machine axis 11—of the ballast plow 17 is designed greater than the crosstie length (SL) of the new crossties 2 (see
As visible in
The operating mode of the machine 1 will now be described in more detail: As can be seen particularly in
As a result of the reduced picking-up of ballast by the excavating chain 8, there remain two ballast banks 20 spaced from one another in a transverse direction of the machine. These are displaced or shifted in each case by the ballast plow 17, following immediately behind in the working direction 6, into an adjoining shoulder region 21 of the track bed 4 for creating the final crosstie support surface 18 (see
As visible in
Alternatively, it would naturally also be possible—particularly in the case of lowering the track to a greater extent—to merely create a temporary support surface 18 by means of the excavating chain 8. The final support surface 18, disposed lower, can be obtained by positioning the ballast plow 17 at a correspondingly lower level. In this manner, overloading of the excavating chain 8 can be avoided. It is also advantageous to execute, in parallel with the grading work, also a compaction of the track bed 4 by means of the ballast plow 17.
Number | Date | Country | Kind |
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1974/08 | Dec 2008 | CH | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2009/008917 | 12/14/2009 | WO | 00 | 10/13/2011 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2010/072346 | 7/1/2010 | WO | A |
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2886904 | Kershaw | May 1959 | A |
3054459 | Scheuchzer | Sep 1962 | A |
4342165 | Theurer et al. | Aug 1982 | A |
4640364 | Theurer | Feb 1987 | A |
5456180 | Theurer et al. | Oct 1995 | A |
5479725 | Theurer et al. | Jan 1996 | A |
6474241 | Theurer et al. | Nov 2002 | B2 |
6477960 | Theurer et al. | Nov 2002 | B2 |
6619405 | Theurer et al. | Sep 2003 | B2 |
6637133 | Theurer et al. | Oct 2003 | B2 |
Number | Date | Country |
---|---|---|
2 714 055 | Dec 1977 | DE |
2714055 | Dec 1977 | DE |
1 179 635 | Feb 2002 | EP |
2009092896 | Jul 2009 | WO |
Number | Date | Country | |
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20120111221 A1 | May 2012 | US |