| 摘要 |
For the change of tools of machine tool operating units, a device is provided which comprises a tool-holder support or carriage (144,204) on which there are mounted at least two tool-holder spindles (48,148) with a corresponding tool (50,150), and the axis of at least one of these at least two tool-holder spindles is inclined at a predetermined angle relative to the axis of the spindle (10,110) of the operating unit. Means controlled by the spindle (10,110) of the operating unit pivot this support or carriage (44,204) and the corresponding at least one tool-holder spindle (48,148) by this predetermined angle, in order to position the required tool-holder in axial alignment with this spindle (10,110). In order to activate the support or carriage a tie rod mechanism (62,64,162,164) is provided which can be displaced axially such as to disengage a pair of ring gears with frontal toothing of the Hirth type (26,57,126,157) and simultaneously to activate a mechanical or pneumatic control for displacement of this support or carriage by this angle for the change of tool-holder and corresponding tool.
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