TOOL SPINDLE HAVING AN ACTIVE MAGNETIC BEARING

摘要

A tool spindle for a drilling tool may include a drive shaft for driving the drilling tool, a chuck connected rigidly to the drive shaft along a rotation axis directed longitudinally with respect to the drive shaft for receiving a clamping shank of the drilling tool, and at least one radial bearing radially enclosing at least a portion of the drive shaft for radially mounting the drive shaft, configured such that the radial bearing may mount the drive shaft to be rotatable about the rotation axis. The radial bearing may be an active magnetic bearing and may be configured such that it mounts the drive shaft to be pivotable about at least one pivot axis extending perpendicularly to the rotation axis through a fixed point, wherein the fixed point may be located in a centering countersink of the drilling tool when the drilling tool is clamped in the tool spindle.

主权项

1. A tool spindle for an elongate drilling tool having an end-side clamping shank for clamping the drilling tool and a centering countersink, arranged opposite the clamping shank in a longitudinal direction, for centering the drilling tool, the tool spindle comprising:
a drive shaft for driving the drilling tool, a chuck, connected rigidly to the drive shaft along a rotation axis directed longitudinally with respect to the drive shaft, for receiving the clamping shank, and at least one radial bearing, radially enclosing at least a portion of the drive shaft, for radially mounting the drive shaft, configured such that the radial bearing mounts the drive shaft so as to be rotatable about the rotation axis, wherein the radial bearing is an active magnetic bearing and is configured such that it mounts the drive shaft so as to be pivotable about at least one pivot axis extending perpendicularly tot he rotation axis through a fixed point, wherein the fixed point is located in the centering countersink when the drilling tool is clamped in the tool spindle.