| 摘要 |
A tool support with a tool slide vertically movable in the support, in which slide there is rotatably and axially displaceably mounted a spindle bar having its upper end engaged by a rotary drive and by a displacement drive, whereas the lower end of the spindle bar has disengageably connected thereto a tool head which is equipped with exchangeably arranged rotatable tools. The tool head is adapted to be locked to the lower end of the tool slide in certain pivoted positions of the tool head. The tool support according to the invention is characterized primarily in that through the spindle bar in the longitudinal direction thereof, there extends with sliding play, a pipe which is connected to a pressure conduit with a pneumatic or hydraulic pressure medium. This pipe leads into the tool head which is displaceable relative to the pipe end. Depending on the respective pivoted position of the tool head, the said pipe is, through bores, in communication with at least one cylinder bore in which a clamping bolt pulled in by spring force is located. This clamping bolt has a clamping jaw for chucking a turning tool arranged in a recess of the tool head and for releasing the turning tool in response to an axial displacement of the chucking bolt toward the outside against the spring force by a pressure medium passing into the cylinder bore.
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