| CPC B24B 45/006 (2013.01) [B24B 23/022 (2013.01)] | 6 Claims |
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1. A quick-change clamping device for a portable power tool, comprising:
at least one output shaft configured be driven in rotation; and
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 a first rotation axis of the output shaft 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;
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,
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.
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