| 摘要 |
An improved machine tool turret assembly includes a turret for holding a plurality of tools. During machining operations the turret is held against rotation by a coupling. Upon operation of the coupling to a disengaged condition by an actuator assembly, a reversible drive assembly is operable to rotate the turret in a selected one of two directions to move a desired tool to an operating position. The coupling is then re-engaged by operation of the actuator assembly. The actuator assembly includes a wedge member which is moved by a cam to effect operation of the coupling between the engaged and disengaged conditions. When the coupling is engaged, a spring applies a biasing force to the wedge member to thereby urge surfaces of the coupling together with a constant clamping force.
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