| 摘要 |
<p>Tool spindle with a moveable pulling rod (3) axially displaceable in the spindle axle (1) for firmly attaching a tool at the axle of the spindle. The end (10) of the pulling rod (3) that is opposite to the tool extends into a unit (4) that accommodates the end of the pulling rod and that is stationary in relation to the rotating pulling rod, in which there is a spool (9) surrounding the pulling rod (3) for sensing the axial position of this in the spindle axle (1), the pulling rod is provided with an axial, central hole (6) for leading a coolant agent under pressure to the bit of the tool, whereby the coolant is supplied to the bore (6) of the pulling rod (3) via the stationary unit, that the pulling rod (3) is provided with a piston (11) accommodated in a cylinder chamber (13) arranged in the spindle axle (1) and having at least a first (12b) and a second (12a) axial bore of which the first bore (12b) opens in the cylinder chamber (13) on one side of the piston (11) and the second bore (12a) opens in the cylinder chamber (13) on the other side of the piston (11) and that the first bore (12b) is put under pressure with fluid via the unit (4) to displace the piston (11) and thereby the pulling rod (3) in one direction to attach firmly the tool at the tool spindle, and the second bore (12a) is put under pressure with fluid via the unit (4) to displace the piston (11) and thereby the pulling rod (3) in the other direction to detach the tool, that the spindle axle (1) for its cooling and that of a rotor (22) attached on to it, is provided with at least one essentially axial first and second channel (20a, 20b), whereby the first channel (20b), via a restriction (21), opens into the cylinder chamber (13) on the side of the piston (11) that is put under pressure for displacing the pulling rod (3) in a direction to attach firmly the tool, and that the second channel (20a) opens into the second bore (12a) of the pulling rod (3) for leading the fluid back to source of fluid via the unit (4), and that the pulling rod has at least one bore (12c) in communication with unit (4) via an inlet (17) to supplying scavenging air and to lead the scavenging air to the tool end of the spindle axle via spindle axle (1).</p> |
