Quick tensioning device for a portable machine tool， in particular for an angle grinding machine

A quick tensioning device for a portable machine tool， in particular for an angle grinding machine， includes at least one output shaft which can be rotated， at least one clamping unit that is at least partly arranged in the output shaft and has at least one clamping element， which is movably mounted at least about and/or along a movement axis of the clamping unit， for fixing an insert tool unit to the output shaft without tools， and at least one torque transmission unit for transmitting a torque to the insert tool unit when the insert tool unit is arranged on the output shaft， said torque transmission unit having at least one torque transmission element which is formed separately from the output shaft. The quick tensioning device includes at least one securing unit at least for securing the torque transmission element to the output shaft in a rotationally fixed manner.