Patent ID: 8991516
Filing Date: 2015-03-31
Classification: B25D,B25F

Abstract:
1. An electric tool, comprising: a gripping portion; a working portion rotatably connected to the gripping portion about an axis; an output shaft moving in a reciprocating manner in a direction perpendicular to the direction of said axis and accommodated in the working portion; a gear box accommodated in the gripping portion for driving the output shaft, the gear box having an opening so that the output shaft is moveable from one end to the other end of the opening when the working portion is rotated relative to the gripping portion about the axis; and a leakage-preventing device arranged at the opening of the gear box, the leakage-preventing device comprising a bushing rotatably mounted within the gear box about the axis, the bushing being formed with a hole in a direction perpendicular to the direction of said axis for the output shaft to pass therethrough and being arranged for always enclosing the opening of the gear box when the bushing is rotated between a first position and a second position.