Clamping device

摘要

A clamping device for machine tools with a power-operated chuck, the clamping jaws of which are actuatable by the clamping device via a movement converter and draw rod. A drive motor is provided with a switching element which is adjustable by axial control in a middle and two limit positions, wherein the switching element is connectable to the clamping device in one limit position and, in the other limit position, to an adjustment element connectable to an auxiliary device. The switching element is lockable in the limit positions with a machine spindle. The clamping device is thereby provided with an increased range of applications, without functions being impaired, with little structural complexity, because the switching element makes possible a clamping element integrated in the power operated chuck to be operated using the drive motor, such that further procedures can be undertaken without changing the clamping device.

主权项

1. A clamping device for machine tools, the clamping device being provided with a power-operated chuck for holding a workpiece and clamping jaws adapted to be actuated by means of a movement converter and an axially moveable draw rod,
wherein the clamping device is provided with an electric drive motor, the electric drive motor being connectable to the movement converter for triggering clamping movements, wherein the electric drive motor is provided with a switching element which is adjustable by axial control between (i) a middle position in which the clamping device retains the clamping jaws in a clamped position around a workpiece so that the clamped workpiece can be machined, (ii) a first limit position for operating the power-operated chuck in a first operating condition, and (iii) a second limit position for operating an axially movable adjustment element in a second operating condition, wherein the adjustment element is connected to an auxiliary device of the machine tool, or is connected to the power-operated chuck for rotating the power-operated chuck in a position-oriented manner, and further wherein the switching element is adapted to be locked and unlocked on a machine spindle of the machine tool in one or both of the first and second limit positions.