Patent ID: 6478555
Filing Date: 2002-11-12
Classification: F04D,F16D,H02K,Y10T

Abstract:
An apparatus for controlling noise and vibration of a drain pump, comprising:a magnet rotated by a mutual interaction with a stator that forms a magnetic field when power is applied thereto; a rotational shaft combined to the magnet; a coupling cylinder combined to an end portion of the rotational shaft; a first coupling member formed at one side of a circumferential portion of the coupling cylinder; an impeller including a receiving unit to which the coupling cylinder is inserted; a second coupling member formed at one side of an inner surface of the impeller and positioned at a predetermined portion of a rotation trajectory of the coupling member; a buffer member positioned between the first coupling member and said second coupling member; and a circular disk insertedly combined at a portion of the rotational shaft positioned at a lower side of the coupling cylinder so that its outer circumferential end portion is combined to the inner circumferential surface of the impeller, wherein the first coupling member is associated with first magnet pocket, the second coupling member is associated with a second magnet pocket, the buffer members are associated with first and second magnetic materials respectively insertedly fixed inside the first and the second magnet pockets.