Device for clamping and loosening a disc-shaped tool situated on the work spindle of an electric tool

摘要

In the case of a known device of this type, one of the two flanges bearing on the tool is relieved of the clamping pressure for the tool by releasing rolling bodies which secure the flange against axial displacement on the work spindle. Such a device requires a relatively large fitting volume and is also expensive to manufacture. The new device is to make it possible, with a minimum space requirement and structural expenditure, to relieve manually a flange of the clamping pressure for the tool. One flange (10) and the clamping nut (11) are joined together to form a constructional unit by means of an actuating ring (16) which is rotatable to a limited extent against a restoring force. The wall of the actuating ring (16) has a cam (17) in which the axial pin (18) of a toggle lever (13) is guided, the toggle lever being arranged in an interspace (12) between the flange (10) and the clamping nut (11) and in its extended position applying the clamping pressure for the tool (25), but in its bent position, in contrast, relieving the flange (10) of the clamping pressure. <IMAGE>