| 摘要 |
A vertical/horizontal spindle head for machine tools having a main transmission shaft with a first bevel gear secured thereon, a lower rotatable housing having a bevel gear axle secured therein, an upper seat having a push/pull apparatus for axially moving the lower rotatable housing relative to the upper seat, a main shaft having a second bevel gear secured thereon, third and fourth bevel gears coaxially arranged on the bevel gear axle, and a curved coupling between the upper seat and the lower rotatable housing. Between the third and fourth bevel gears are springs to move the third bevel gear axially and maintain it in engagement with the first bevel gear. A slidable spline device is provided between the third bevel gear and the bevel gear axle. The slidable spline device is disengaged in a first position where the curved coupling is coupled and is engaged in a second position when the lower rotatable housing is pushed away from the upper seat by the push/pull apparatus and the curved coupling is uncoupled. In the first position, the main transmission shaft can rotate the main shaft through the first, third, fourth and second bevel gears. In the second position, the lower rotatable housing can be rotated to a desired angular position by the main transmission shaft, through the first bevel gear, the third bevel gear and the slidable spline device.
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