| CPC B23B 3/06 (2013.01) [B23B 3/30 (2013.01); B23Q 5/40 (2013.01); B23Q 2705/102 (2013.01); B23Q 2705/24 (2013.01)] | 8 Claims |
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1. A lathe comprising:
a spindle configured to hold a workpiece and rotate on a spindle axis;
a tool post comprising at least one tool holder including a tool, the tool holder extending along a tool holder axis; the tool being configured to machine the workpiece by moving the tool post in a direction towards a front side on which the tool cuts into the workpiece held by the spindle; wherein in a plan view of the lathe, the tool holder axis is substantially perpendicular to the spindle axis;
a driving shaft extended in an axial direction perpendicular to the spindle axis and configured to move the tool post in the axial direction; and
a movement restricting unit provided on an end of the driving shaft with respect to the axial direction to restrict movement of the driving shaft in the axial direction;
wherein the tool post is provided with a driven unit engaged with the driving shaft, and the driven unit is movable in the axial direction according to rotation of the driving shaft,
wherein the axial direction comprises a direction that the driven unit approaches the movement restricting unit,
wherein the direction that the driven unit approaches the movement restricting unit faces the same direction as the direction that the tool cuts into the workpiece, and
wherein in the plan view, an orthogonal projection of a cutting edge of the tool, projecting in a direction substantially parallel to the spindle axis so as to project onto the driving shaft, partially coincides with the driven unit.
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