Patent ID: 7383777
Filing Date: 2008-06-10
Classification: E01B

Abstract:
1. A track tamping machine, comprising: a machine frame extending in a longitudinal direction and defining a vertical machine center line; an upper transverse guide fastened to said machine frame and extending in a transverse direction substantially perpendicularly to the longitudinal direction; two sliding blocks mounted for displacement in the transverse direction independently of one another on said upper transverse guide; a lower transverse guide disposed below, with regard to a vertical, said upper transverse guide and extending parallel to said upper transverse guide, said lower transverse guide being mounted in said sliding blocks for displacement relative thereto in the transverse direction; two inner unit frames each connected to a respective one of said sliding blocks and supporting a tamping unit; two outer unit frames each positioned farther from the vertical machine center line, with regard to the transverse direction, than an adjacent one of said inner unit frames and supporting a tamping unit, said outer unit frames being mounted on said lower transverse guide for displacement in the transverse direction independently of one another; transverse drives for independent transverse displacement of said sliding blocks, or said inner unit frames, along said upper transverse guide; and displacement drives for independent transverse displacement of said outer unit frames along said lower transverse guide.