portable electric tool comprising an epicyclic reduction gear

摘要

The invention relates to a portable power tool including, within a housing (2, 4): an electric motor (10) having a drive shaft (12), an epicyclic reduction gear (20) having planetary gears ( 25) engaged with a central gear (26) of the drive shaft (12) of the electric motor (10), wherein the reduction gear is provided with an output shaft (12) which is rigidly connected to a ball screw ( 34) of a ball-nut screw spindle mechanism (30) and is coaxial to the ball screw (34), and a support bearing (ps1) that connects the output shaft (32) to the housing (2, 4). According to the invention, the tool includes at least one stabilizing bearing (ps2, ps2a, ps2b, ps2c) axially displaced with respect to the support bearing (ps1). The stabilizing bearing (ps2, ps2a, ps2b, ps2c) connects the output shaft (32) of the epicyclic reduction gear (20) to the housing (2, 4) through at least one intermediate part selected from: o drive shaft (12) of electric motor (10), planetary support shafts (24) of epicyclic reduction gear (20) and epicyclic reduction gears (25) of epicyclic reduction gear (20). The invention finds use in scissors, in particular sheet metal scissors.