Mobile ballast tamper

摘要

A mobile ballast tamper comprises a vertically movable tamping head with vibratory tamping tools for tamping ballast under the track ties whereby the track is pressed upwardly. A counterpressure beam for holding the track in position against the upward pressure extends above each track rail in the direction thereof in the region of the tamping tools and has at least three points of engagement with the associated rail. Power-actuated drives are linked to ends of the counterpressure beams.