Power tool annex, power tool's coupling assembling , and power tool

The utility model relates to a power tool annex is including having along the instrument head of vertical axis extend's long and thin main part. Long and thin main part has the triangle pole portion that arranges at first end, arranges the pentagon post portion at the phase 2 enzyme remote site to and the mid portion of connection between triangle pole portion and pentagon post portion. The power tool annex is further including being suitable for the cover to establish at the overhead one -way bearing of instrument to and the bearing fixer on one -way bearing is established to the cover. This application also relates to a coupling assembling, connects connecting plug and input shaft joint including the output shaft. The output shaft connects to be suitable for receives the power tool annex. The input shaft joint is suitable for through connecting plug with the drive mechanism operationally coupling of output shaft joint with power tool. This application still relates to a power tool who installs above -mentio