Patent ID: 6966391

Claim:
A motor and gearbox combination for use in a portable power tool, having: a motor section comprising: a motor housing having a first end and an open second end; a bearing supported at the first end of the motor housing; a stator fixed to the motor housing; a partition plate fixed to the second end of the motor housing; a motor shaft journalled at one end in the bearing and extending through the partition plate; and a rotor mounted on the motor shaft in confrontation with the stator; a gearbox section comprising: a gearbox housing fixed to the partition plate; the gear box housing accommodating a gear train comprising at least: a sun gear fitted to the motor shaft; a carrier plate having a number of spigots; a ring gear surrounding the carrier plate; a number of planet gears in mesh with the sun gear and the ring gear, and mounted on respective spigots of the carrier plate for driving the carrier plate; and an output shaft driven by the gear train and mounted in a bushing fitted to an opening in the gearbox housing, wherein the other end of the motor shaft is journalled in a hole in one of the carrier plate and the output shaft.