Mobile track tamping machine
AssigneeFranz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.
InventorJosef Theurer
Life of this patent
Estimating the term…
Abstract
A mobile track tamper comprises two tamping tool assembly units mounted on a machine frame for vertical movement. Each tamping tool assembly includes two pairs of vibratory tamping tools spaced from each other in the direction of track elongation so that each pair of tools may be immersed in successive cribs and the two units are so spaced that all four pairs are immersible in successive cribs. The tools of each pair are reciprocable in opposite directions towards and away from the elongated edges of adjacent ties wherebetween the cribs are defined. A common drive vertically moves the tamping tools of each unit.
Claims12
A mobile track tamping machine for substantially simultaneously tamping ballast underneath five successive track ties resting on the ballast, the ties having elongated edges extending transversely of the track and two ends extending in the direction of the track, the elongated edges of adjacent ones of the ties defining cribs therebetween, which comprises
- (a) a machine frame;
- and
- (b) two like tamping tool assembly units mounted on the machine frame for vertical movement, each tamping tool assembly unit being a structural unit including
- (1) a carrier for the tamping tools mounted on the machine frame for vertical movement and adjustably spaced from each other in the direction of the track,
- (2) no more than four tamping tools immersible in the ballast and arranged on the carrier in two like pairs of vibratory tamping tools spaced from each other in the direction of the track, the spacing being such that each pair of tools is in vertical alignment with a respective one of two successive ones of the cribs whereby the tamping tools of each pair may be immersed in the respective crib upon vertical downward movement of the carrier,
- (3) a pivot mounting each one of the tamping tools on the carrier for reciprocation of the tamping tools of each pair in opposite directions towards and away from a respective one of the elongated edges of an adjacent one of the ties, the pivots of each of the pairs of tamping tools being spaced from each other in the track direction less than one crib width, and the pairs of tamping tools having tamping jaws for immersion in the ballast whose closest spacing in the track direction is smaller than the average size of the ballast,
- (4) a common drive for vibrating the two pairs of tamping tools arranged on the carrier centrally with respect to the pairs of tamping tools,
- (5) a drive for independently reciprocating each of the tamping tools about their pivots, and
- (6) a drive arranged centrally with respect to the pairs of tamping tools for vertically moving the carrier with the tamping tools;
- (c) the spacing of the tamping tool assembly unit carriers being such that the pairs of tamping tools may be immersed in four successive ones of the cribs upon the vertical movement of the carriers.
Dependencies are inferred from the claim text.