Patent ID: 9050663
Filing Date: 2015-06-09
Classification: B23B,Y10T

Abstract:
1. A hand-held power tool with a quick-clamping device for a working element, comprising: a working mandrel for driving the working element, the working mandrel having a working end; a fastening member for fastening the working element onto the working end, the fastening member including a clamping shaft insertable into the working mandrel; a moving assembly for making the fastening member move between a releasing position and a clamping position, wherein said fastening member is detachable from said working mandrel at the releasing position and said fastening member is clampable against the working end of said working mandrel by means of a clamping force at the clamping position; and a locking assembly received in said working mandrel, for locking said clamping shaft at said clamping position so that the clamping shaft cannot be taken out, and for loosening said clamping shaft at said releasing position so that the clamping shaft can be taken out of said working mandrel, wherein said locking assembly includes a clamping component moveable along the direction of a longitudinal axis of said working mandrel and provided with a second toothed portion, and said clamping shaft is provided with a first toothed portion for mating with the second toothed portion, wherein both the second toothed portion and the first toothed portion have teeth extending circumferentially so that the second toothed portion engages with the first toothed portion at said clamping position and the second toothed portion disengages from the first toothed portion at said releasing position, wherein said moving assembly further comprises a thrust component, wherein an upper end of the thrust component is connected with an end cam in such a way that they are not rotatable relative to each other, and the upper end of the end cam is provided with a high position and a low position, wherein the end cam is rotated about the longitudinal axis to provide a smooth transition between the high position and the low position.