Vibration damper for hole machining apparatus

摘要

A vibration damper for a drill tube of a hole machining apparatus includes a closed loop bi-directional adjustment mechanism, which operates from a single side of the damper. The closed loop mechanism ensures that the position of the clamping sleeve has a one-to-one relationship with the adjustment mechanism, which enables controlled adjustment of the clamping force to be performed. Locating the adjustment mechanism at one side of the clamping sleeve facilitates re-tooling, e.g. replacing the clamping sleeve if a larger diameter drill tube is to be used.

主权项

1. A vibration damper for a drill tube of a hole machining apparatus, the vibration damper comprising:
a damper carriage for mounting around the drill tube; an inertial mass rotatably mounted in the damper carriage; a clamping sleeve mounted in the damper carriage, the clamping sleeve having a bore for receiving the drill tube and being axially movable relative to the damper carriage to provide frictional engagement between the drill tube and inertial mass; an adjustment element connected to the clamping sleeve to move axially with the clamping sleeve and to rotate freely relative to the clamping sleeve, and a bi-directional drive mechanism arranged to drive the clamping sleeve forwards and backwards along its axis via the adjustment element, wherein the bi-directional drive mechanism includes a drive member in self-locking engagement with the adjustment element.