| 摘要 |
Arrangement for a tool spindle with a pulling rod (3) axially displaceable in the spindle axle (1) for firmly attaching a tool at the spindle of the tool whereby the end of the pulling rod (3) that is opposite to the tool is accommodated in a stationary unit (4), the rotating part (1, 3) is provided with a piston (11) movably displaceable in a cylinder chamber (13) arranged in the spindle axle (1), the pulling rod (3) has at least one first axial bore (12a) opening into the cylinder chamber on one side of the piston (11) and at least one second (12b) axial bore opening into the cylinder chamber on the other side of the piston (11), the stationary unit (4) is provided with an inlet (16) in communication with the first bore (12a) and an inlet (14) in communication with the second bore (12 b). The bores (12a, 12b) can be put under pressure or respectively relieved of pressure via inlet (16, 14) from a fluid for displacing the piston (11) in one of the directions depending on the desired displacement of the piston (11) and thereby the pulling rod (3) from a releasing to an attaching position and back again. Gap sealings that separate the rotating part (1, 3) from the stationary unit (4) are arranged on either side of the respective inlet (14, 16) thereby forming a dynamic bearing during the rotation of the rotating part due to the leakage of the fluid through the gap sealings. |
