Patent ID: 7786639

Claim:
A motor comprising, in combination: a base including a shaft tube; a bearing mounted in the shaft tube and including first and second end faces spaced along a longitudinal axis of the bearing, with the bearing further including a longitudinal hole extending from the first end face through the second end face along the longitudinal axis of the bearing, with the longitudinal hole including a recessed portion contiguous to the first end face, with the recessed portion including a first peripheral edge contiguous to the first end face and a second peripheral edge contiguous to an inner periphery of the longitudinal hole, with the first end face having an axial spacing to the second peripheral edge along the longitudinal axis; a retaining member mounted to the first end face of the bearing, with the retaining member including a through-hole having an inner periphery, with the inner periphery of the through-hole of the retaining member having a radial spacing to the inner periphery of the longitudinal hole of the bearing in a radial direction perpendicular to the longitudinal axis, with the radial spacing being not greater than the axial spacing, with the retaining member further including a plurality of annularly spaced grooves each extending from the inner periphery of the through-hole in the radial direction away from the longitudinal axis, with a retaining plate formed between two of the plurality of grooves adjacent to each other; a rotor including a shaft rotatably extending through the longitudinal hole of the bearing, with the shaft including an annular groove in an outer periphery thereof, with the retaining plates of the retaining member extending into the annular groove; and a stator mounted around the shaft tube.