Worktable for a machine tool
OwnerPeter Grundinventor
Life of this patent
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Abstract
A workpiece table, provided for a machine tool, is movable back and forth between two end positions and has for this purpose a rotational drive which has a gear part joined to the workpiece table for rotation thereof, a toothed rack in engagement therewith, as well as a medium-actuated shift drive for displacement of the toothed rack, which thereby performs a linear stroke motion, delimited by stops, between two end locations corresponding to the end positions of the workpiece table. Provided on the workpiece table is a mechanism which acts upon the toothed rack with a higher feed force at the beginning of the linear stroke movement than during the remainder of the linear stroke.
Claims23
A workpiece table, provided for a machine tool, comprising a rotational drive having a gear part joined to said workpiece table, a toothed rack in engagement with said gear part, a medium-actuated shift drive acting on said toothed rack for displacing same in the sense of a linear stroke movement between two end locations, and two stops for delimiting said stroke movement at said end locations, upon execution of said stroke movement said workpiece table being moved back and forth between two end positions corresponding to said end locations of said toothed rack, wherein a mechanism is provided which displaces the toothed rack with a higher feed force at the beginning of the linear stroke movement than during the remainder of the linear stroke.
An auxiliary shift drive for a rotational drive for a workpiece table of a machine tool which can be moved back and forth between two end positions, the rotational drive having a gear part joined to the workpiece table for rotation thereof, a toothed rack in engagement therewith, as well as a medium-actuated shift drive for displacement of the toothed rack, which thereby performs a linear stroke motion, delimited by stops, between two end locations corresponding to the end positions of the workpiece table, the auxiliary shift drive having means acting temporarily on the toothed rack with an additional feed force at the beginning of the linear stroke movement.
A damping mechanism for a rotational drive for a workpiece table of a machine tool which can be moved back and forth between two end positions, the rotational drive having a gear part joined to the workpiece table for rotation thereof, a toothed rack in engagement with said gear part, as well as a medium-actuated shift drive for displacement of the toothed rack, which thereby performs a linear stroke motion, delimited by stops, between two end locations corresponding to the end positions of the workpiece table, such that the damping mechanism builds up a regulated counterpressure for controlled deceleration of the moving toothed rack.
Dependencies are inferred from the claim text.