Rail grinding machine

A rail grinding unit for grinding surface irregularities on a rail head of at least one rail of a railroad track having two rails, which comprises

• (a) a support frame having opposite ends,
• (b) an undercarriage having flanged wheels supporting each support frame end on the rails for mobility along the railroad track,
• (c) a carrier frame mounted on the support frame,
• (d) an endless grinding band mounted on the carrier frame and being vertically adjustable with respect to the support frame,
• (1) the grinding band being trained about guide rollers under tension for rotation thereabout, an upper one of the guide rollers constituting a tension roll holding the endless grinding band under tension and a lower one of the guide rollers constituting a pressure roll mounted on the carrier frame for pressing the endless grinding band into grinding contact with the surface,
• (e) a vertically displaceable carriage rotatably bearing the tension roll,
• (f) vertical guide posts mounted on the carrier frame in a longitudinal plane of symmetry of the endless grinding band, the plane of symmetry extending parallel to a vertical longitudinal plane defined by the rail,
• (1) respective ends of the carriage being vertically displaceably mounted on the vertical guide posts,
• (g) a drive for vertically displacing the carriage, and
• (h) a vertical adjustment device connected to the support frame for adjusting the depth of the grinding contact of the endless grinding band with the pressure roll in relation to the surface,
• (1) the vertical adjustment device including a remote-controlled motor drive for operating the vertical adjustment device.

A rail grinding unit for grinding surface irregularities on a rail head of at least one rail of a railroad track having two rails, which comprises

• (a) a support frame having opposite ends,
• (b) an undercarriage having flanged wheels supporting each support frame end on the rails for mobility along the railroad track,
• (c) a carrier frame mounted on the support frame,
• (d) an endless grinding band mounted on the carrier frame and being vertically adjustable with respect to the support frame,
• (1) the grinding band being trained about two upper guide rollers under tension for rotation thereabout, the upper guide rollers being mounted on the carrier frame sequentially in a longitudinal direction of the rail in a vertical plane, and a lower one of the guide rollers constituting a pressure roll for pressing the endless grinding band into grinding contact with the surface, the pressure roll being arranged in said plane substantially centrally between the upper guide rollers and having a diameter larger than that of the upper guide rollers,
• (e) a remote-controlled motor drive arranged to adjust the guide rollers in unison vertically with respect to the machine frame, and
• (f) a vertical adjustment device connected to the support frame for adjusting the depth of the grinding contact of the endless grinding band with the pressure roll in relation to the surface,
• (1) the vertical adjustment device including a remote-controlled motor drive for operating that vertical adjustment device.