EP1403433B1 - Ballast Tamping Machine and Method for Tamping a Railway Track - Google Patents

Description

The invention relates to a machine according to the features of the preamble of claim 1 and a method for simultaneous underfilling of four sleepers according to the preamble of claim 3 and the preamble of claim 4.

Such a tamping unit is known from US Pat. No. 5,706,734, with which three or five thresholds arranged one behind the other can be plugged. For this purpose, five pairs of stuffing needles are positioned on each rail side, to which three vibration drives are assigned. Due to the tight juxtaposition of the stuffing-needles pairs, however, there may be problems with respect to the unimpeded height adjustment of the stuffing-dough pairs or the additional movement of the stuffing picks. These are partly to be provided in two opposite directions.

From DE 15 34 022 it is also known to arrange two tufting pairs for the purpose of clogging three sleepers one behind the other.

The object of the present invention is now to provide a machine of the generic type, with a total of four sleepers are optimally unteropfbar in a structurally simplified manner.

According to the invention this object is achieved with a machine of the type mentioned by the features cited in the characterizing part of claim 1.

With such a constructive solution, a dense and therefore because of movement restrictions with respect to the Beistell- and lowering movements problematic juxtaposition of Stopfpickelpaare be avoided in an advantageous manner. Despite this loose arrangement, however, is a good one Clogging can be achieved, as at four successive thresholds per rail at least one threshold support is completely unteropfbar.

Further advantages and embodiments of the invention will become apparent from the other claims and the drawings.

In the following the invention will be described in more detail with reference to embodiments shown in the drawing.

Fig. 1

eine Teil-Seitenansicht einer Maschine zum Unterstopfen eines Gleises,

Fig. 2 und 3

eine Draufsicht auf das Gleis mit schematisierten Stopfaggregaten, wobei in Fig. 2 ein erster und in Fig. 3 ein zweiter Stopfvorgang dargestellt ist, und

Fig. 4

eine weitere schematische Draufsicht auf das Gleis.

Show it:

Fig. 1

a partial side view of a machine for submerging a track,

FIGS. 2 and 3

a top view of the track with schematic tamping units, wherein in Fig. 2, a first and in Fig. 3, a second stuffing process is shown, and

Fig. 4

another schematic plan view of the track.

A machine 1 shown in FIG. 1 for undercutting a track 4 formed from sleepers 2 and rails 3 has a machine frame 5 with rail carriages 6 arranged at the end. Between these an aggregate frame 7 is positioned, which is articulated longitudinally displaceable on one end 8 on the machine frame 5 and is supported at the other end via a chassis 9 on the track 4. A track lift unit 10 is used in conjunction with a reference system 11 for the track position correction. While in operation, the machine frame 5 continues to move continuously in one working direction 12, the unit frame 7 is stopped locally during the tamping process and then quickly moved forward relative to the machine frame 5 to the next stuffing area for the next stuffing operation.

On the unit frame 7 two spaced apart in the cross machine direction stuffing units 13 (see Figures 2 and 3) are arranged, each one composed of four tufting pairs 14,15,16,17. Each stuffing pick 14 - 17 consists of two with the help of Beistellantrieben 18 can be placed stuffing pickles 19, which are displaceable by a common vibration drive 20 in vibration. Each tamping pick 19 is provided for immersion in a threshold pocket 26 formed by two adjacent sleepers 2.

As can be seen in FIGS. 2 and 3, the four pairs of stuffing picks 14 to 17 of a stuffing unit 13 are positioned alternately in the machine longitudinal direction at a shorter distance x and a longer distance y with respect to a machine center 21. Thus, with the closer to the machine center 21 Stopfpickelpaaren 15,17 a rail inside 22 adjacent Schwellenauflager 23 are supported, while the remaining Stopfpickelpaare 14,16 are provided for compression of a rail outside 24 adjacent Schwellenauflagern 25. The auxiliary drives 18 are designed for a first auxiliary movement leading away from the respective vibration drive 20 (see the tamping direction 27 in FIG. 2) and a counter-rotating second auxiliary movement leading to the vibration drive 20 (see tamping direction 28 in FIG.

A stuffing cycle for simultaneous clogging of four sleepers consists of two stuffing operations and is performed as follows:

In a first stuffing process (see Fig. 2), both tamping 19 each Stopfpickelpaares 14 to 17 are moved to each other (see Stopfrichtung 27), so that in each case the intervening threshold 2 is supported. Immediately thereafter, the second stuffing operation (see Fig. 3) by the Beistellbewegung the Beistellantriebe 18 is reversed in the opposite direction and thereby the stuffing tampons 19 immersed in the ballast each Stopfpickelpaares 14 to 17 are moved from each other (see Stopfrichtung 28). Thus, each of the threshold support 23 and 25 of the two tamping pairs 14 to 17 lying threshold 2 compacted. The foremost or rearmost tamping knobs 19 compress only one half of the respective Stopfauflagers 23 and 25. The other half was already stuffed in the previous Stopfzyklus or in the next Stopfzyklus after forward movement of the unit frame 13 by four times the threshold distance (A) compacted.

As can be seen in FIG. 4, four threshold supports 23, 25 are completely compressed per rail side in the first stuffing operation (see horizontal lines). In the subsequent second stuffing operation, two threshold supports 23, 25 are completely supported by an opposite supply direction and four threshold supports 23, 25 are supported in half (see vertical, solid lines). The dashed lines indicate those semi or fully stuffed threshold supports 23, 25 that have already been compacted during the previous stuffing cycle.

In the example shown, each associated with a Beistellantrieb 18 stuffing lever 29 only a single tamping 19. Optionally, however, two tamping knobs 19 may also be attached to the tamping lever 29 in, for example, US Pat. No. 4,476,786. According to the invention, it would also be possible to perform the first stuffing operation by a first and in the transverse direction opposite second stuffing unit, and the second stuffing process by a subsequent third and fourth stuffing unit.

Claims (4)

1. A machine (1) for tamping sleepers (2) of a track (4), including a machine frame (5) mobile on on-track undercarriages (6), the machine frame (5) having tamping units (13) which lie opposite one another in the transverse direction of the machine and comprise vibration drives (20), the tamping units (13) being composed of tamping tine pairs (14,15,16,17), arranged one following the other in the longitudinal direction of the machine and comprising in each case two tamping tines (19) squeezable by means of a squeeze drive (18), characterized by the following features:

   a) for simultaneously tamping four successive sleepers (2), each tamping unit (13) comprises four tamping tine pairs (14 - 17),

   b) the four tamping tine pairs (14 - 17) of a tamping unit (13) are positioned, alternating in the longitudinal direction of the machine, at a shorter distance (x) with regard to a machine center (21) - for tamping sleeper supports (23) situated at the gauge side of the rail - and at a longer distance (y) with regard to the machine center (21) for tamping sleeper supports (25) situated at the field side of the rail.
2. A machine according to claim 1, characterized in that each squeeze drive (18) is designed for a first squeezing motion leading away from the vibration drive (20) and an oppositely directed second squeezing motion leading towards the vibration drive (20).
3. A method of simultaneously tamping four sleepers (2) by immersing tamping tines (19) - forming in each case a tamping tine pair (14 - 17) squeezable by means of a squeeze drive (18) - into ballast of a track (4), wherein two adjacent sleepers (2) form a sleeper crib (26), characterized by the following method steps:

   a) for each rail (3), four tamping tine pairs (14 - 17) are centered alternatingly - as seen in the longitudinal direction of the machine - above sleeper supports (23) adjoining a gauge side (22) of the rail and sleeper supports (25) adjoining a field side (24) of the rail while staggered with regard to one another by one sleeper crib (26), respectively, wherein

   b) a respective rear tamping tine (19) - with regard to a working direction (12) - of the preceding tamping tine pair (14 - 17) and a front tamping tine (19) of the following tamping tine pair (14 - 17) are arranged for immersion into the same sleeper crib (26),

   c) in a first tamping procedure, the tamping tines (19) of each tamping tine pair (14 - 17) - for tamping the sleeper (2) lying between them in each case are squeezed towards one another in a first tamping direction (27),

   d) in a second tamping procedure, the tamping tines (19) are each moved away from one another in a second tamping direction (28) opposite to the first tamping direction (27).
4. A method of simultaneously tamping four sleepers (2) by immersing tamping tines (19) - forming in each case a tamping tine pair (14 - 17) squeezable by means of a squeeze drive (18) - into ballast of a track (4), wherein two adjacent sleepers (2) form a sleeper crib (26), characterized by the following method steps:

   a) for each rail (3), a first and a second group of four tamping tine pairs (14 - 17) are centered alternatingly - as seen in the longitudinal direction of the machine - above sleeper supports (23) adjoining a gauge side (22) of the rail and sleeper supports (25) adjoining a field side (24) of the rail while staggered with regard to one another by one sleeper crib (26), respectively, wherein

   b) a respective rear tamping tine (19) - with regard to a working direction (12) - of the preceding tamping tine pair (14 - 17) and a front tamping tine (19) of the following tamping tine pair (14 - 17) are arranged for immersion into the same sleeper crib (26),

   c) in a first tamping procedure, a sleeper support (23) situated at the gauge side of the rail and a sleeper support (25) situated at the field side of the rail is tamped, alternating in the longitudinal direction of the machine, by the first group of tamping tine pairs (14 - 17),

   d) in a subsequent, second tamping procedure, the remaining sleeper supports (23, 25) are tamped by the second group of tamping tine pairs (14 - 17).

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