Patent ID: 9174354
Filing Date: 2015-11-03
Classification: B23B,B23Q,B24B,B25F,B27B,Y10T

Abstract:
1. A power tool, comprising: a driving shaft for driving a working element; a clamping device for clamping the working element, the clamping device having a clamping position where the working element is fixed relative to the driving shaft and a release position where the working element is removable from the driving shaft; and an operating member coupled to the clamping device and being manually moveable to cause the clamping device to move between the clamping position and the release position; wherein the clamping device further has a rotating position in which the working element is free to be angularly rotated relative to the driving shaft and wherein the operating member is moveable to an operating position corresponding to the rotating position, wherein the driving shaft comprises a hollow spindle and the clamping device comprises a fastening element having a clamping shaft insertable into the spindle and a locking assembly for locking the clamping shaft in the spindle, wherein, in the clamping position, the fastening element is locked by the locking assembly and located in a first locking position, in the rotating position, the fastening element is locked by the locking assembly and located in a second locking position and, in the release position, the fastening element is releasable from the locking assembly, and wherein the locking assembly comprises a locking member, an intermediate member, and a moving member wherein the intermediate member is between the locking member and the moving member, the moving member has a concave portion and a straight portion, and the intermediate member is selectively abutted against the concave portion or the straight portion of the moving member.