| 摘要 |
A gear shaping apparatus in which a spindle with the cutting wheel thereon is movable axially from its normal operating range to a retracted position to facillitate insertion and removal of the work piece. A retracting drive is provided separate from the stroke drive which reciprocates the spindle axially for normal cutting. For retraction of the spindle, the stroke drive is first disengaged from its driving connection to the spindle, after which the retracting drive is drivingly engaged with the spindle to retract the same. The retracting drive may be a fluid operated piston and cylinder unit operably connected to the spindle or a separate motor attached to a shaft which is permanently drivingly engaged with the spindle. |
