Turret with several drivable tool spindles for a machine tool

Turret comprising a turret body and a turret head rotatable about an indexing axis relative to said turret body, said turret head being displaceable along said indexing axis from a working position in which it is non-rotatably held on said turret body into an indexing position in which it is rotatable about said indexing axis, several spindles being rotatably mounted in said turret head, each of said spindles being in rotary drive connection with a spindle gear and being able to be brought into a working position by rotation of said turret head, further comprising a drive element rotatably mounted in said turret body and being in drive connection with a rotary encoder for driving a switchable coupling for indexing said turret head and for driving a drive shaft rotatably mounted in radially spaced relation to said indexing axis in said turret body, and also comprising a drive gear engageable with the spindle gear of a spindle which is in the working position, characterized in that said spindle gear of a spindle which is in the working position is engageable with and disengageable from said drive gear of said drive shaft by displacement of said turret head between its indexing position and its working position, in that a switchable locking mechanism is provided for each spindle, and in that a releasing mechanism activatable by displacement of said turret head into its working position is provided on said turret body to release said locking mechanism of said spindle in the working position.