The invention relates to a tamping unit for simultaneously tamping three sleepers of a track according to the features of the introductory part of claim 1.
A tamping unit of this type is known from U.S. Pat. No. 5,133,263. In order to tamp three sleepers simultaneously, it is necessary to group a larger number of tamping tools tightly together with regard to a longitudinal direction of the machine. However, for the unhindered execution of a squeezing motion for consolidating the ballast, these tamping tools must be sufficiently spaced from one another.
It is the object of the present invention to create a tamping unit of the kind mentioned at the beginning with which it is possible to also tamp tracks having a smaller sleeper spacing.
According to the invention, this object is achieved with a tamping unit of the specified kind by means of the features cited in the characterizing part of claim 1.
By relocating the pivot axes of the inner tamping tools in this way, it becomes possible to arrange the tamping tools even closer together with regard to the longitudinal direction of the machine while, in principle, the already time-tested structural embodiment of the tamping unit can still be largely preserved. It is therefore possible with a tamping unit designed in this way to tamp without problems even tracks having a relatively small sleeper spacing.
Additional advantages of the invention become apparent from the dependent claims and the description of the drawing.
The invention will be described in more detail below with reference to an embodiment represented in the drawing in which
A tamping machine 1, visible in
As visible in
Described below is the particular arrangement of the tamping tools 12, 13, 14 and their pivot axes 17, allowing tamping, according to the invention, of tracks 3 having small sleeper distances.
The pivot axis 17 of the inner tamping tool 12 is positioned lower, with respect to the pivot axis 17 of the central tamping tool 13, by a vertical distance a (
Number | Date | Country | Kind |
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A2037/2006 | Dec 2006 | AT | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2007/009861 | 11/15/2007 | WO | 00 | 5/13/2009 |