Quick clamping device for a portable power tool, in particular an angle grinder, having in particular at least one output shaft that is drivable in rotation

A power tool, comprising:

• an output shaft configured to be driven in rotation about a first rotation axis;
• and
• a quick-change clamping device including at least one clamping unit configured to fix an insert-tool unit to the output shaft without use of tools, the clamping unit having at least one movably mounted clamping element configured to apply a clamping force to the insert-tool unit when the clamping element is in a clamping position,
• wherein the clamping element is formed by a positive-engagement element that is movable transversely in relation to the first rotation axis and that is configured to engage with positive engagement behind at least a sub-region of the insert-tool unit so as to secure the insert-tool unit, and
• wherein the clamping element includes a toggle lever mounted so as to be rotatable about a second rotation axis that extends in a direction perpendicular to the first rotation axis, the second rotation axis being spaced apart from the first rotation axis;
• wherein the quick-change clamping device further comprises:
• at least one operating unit configured to move the clamping element into one or more of the clamping position and a release position of the clamping element in which the insert-tool unit is configured to be removed from the clamping unit;
• and
• a spring configured, in at least one operating state, to exert a first spring force on at least one first eccentric force introduction point of the clamping element to rotate the clamping element into a clamping position, the at least one first eccentric force introduction point being eccentric with respect to both the first and second rotation axes, and
• wherein the operating unit is configured to act upon a second eccentric force introduction point that is spaced apart from the first eccentric force introduction point so as to rotate the clamping element into a release position.

A power tool system, comprising:

• an insert-tool unit;
• and
• at least one power tool including:
• an output shaft configured to be driven in rotation about a first rotation axis, and
• a quick-change clamping device that includes at least one clamping unit configured to fix the insert-tool unit to the output shaft without use of tools, the clamping unit having at least one movably mounted clamping element configured to apply a clamping force to the insert-tool unit when the clamping element is in a clamping position,
• wherein the clamping element is formed by a positive-engagement element that is movable transversely in relation to the first rotation axis and that is configured to engage with positive engagement behind at least a sub-region of the insert-tool unit so as to secure the insert-tool unit, and
• wherein the clamping element includes a toggle lever mounted so as to be rotatable about a second rotation axis that extends in a direction perpendicular to the first rotation axis, the second rotation axis being spaced apart from the first rotation axis,
• wherein the quick-change clamping device further comprises:
• at least one operating unit configured to move the clamping element into one or more of the clamping position and a release position of the clamping element in which the insert-tool unit is configured to be removed from the clamping unit;
• and
• a spring configured, in at least one operating state, to exert a first spring force on at least one first eccentric force introduction point of the clamping element to rotate the clamping element into a clamping position, the at least one first eccentric force introduction point being eccentric with respect to both the first and second rotation axes, and
• wherein the operating unit is configured to act upon a second eccentric force introduction point that is spaced apart from the first eccentric force introduction point so as to rotate the clamping element into a release position.