Machine tool
AssigneeSugino Machine Limited
InventorAyumu TAMURA
Life of this patent
Estimating the term…
Abstract
A machine tool includes: a frame; a hollow ram disposed on the frame in a reciprocable manner; a hollow spindle to which a tool is mountable, rotatably supported by the ram, and having a lever hole penetrating the spindle in a radial direction and extending in an axial direction; a drawbar including a collet, reciprocate in the spindle, and urged toward a basal end of the spindle; a lever connected to the drawbar and extending radially outward of the spindle through the lever hole; a trigger fixed to the frame; a feed unit that reciprocates the ram, advances the ram toward a distal end to machine a workpiece, and retracts the ram toward a basal end to bring the lever into contact with the trigger for the drawbar to advance with respect to the spindle to open the collet.
Claims20
A machine tool, comprising:
- a frame;
- a hollow ram disposed on the frame in a reciprocable manner;
- a hollow spindle to which a tool is mountable, the spindle rotatably supported by the ram, the spindle having a lever hole penetrating the spindle in a radial direction and extending in an axial direction;
- a drawbar including a collet, the drawbar configured to reciprocate in the spindle, the drawbar configured to be urged toward a basal end of the spindle;
- a lever connected to the drawbar, the lever extending radially outward of the spindle through the lever hole;
- a trigger fixed to the frame;
- a feed unit configured to reciprocate the ram, the feed unit configured to advance the ram toward a distal end to machine a workpiece, the feed unit configured to retract the ram toward a basal end to bring the lever into contact with the trigger for the drawbar to advance with respect to the spindle to open the collet.
Dependencies are inferred from the claim text.