Apparatus for controlling noise and vibration for drain pump

摘要

An apparatus for controlling a noise and a vibration of a drain pump, including: 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 tap receiving unit to which the coupling cylinder is inserted; a second coupling member formed at one side of the inner surface of the impeller and positioned at a predetermined portion of a rotation trajectory of the first coupling member; buffer members are positioned between the first coupling member and the second coupling member; and a fixed circular disk insertedly located at a portion of the rotational shaft positioned at the lower side of the coupling cylinder so that its outer circumferential end portion is combined to the inner circumferential surface of the impeller. In order to minimize the noise and the vibration generated due to the coupling of the impeller tap and the shaft tap in the initial driving of the drain pump, the buffer members refer to plural elastic deformation members (133a) and (133b) that are elastically deformed to rotate the coupling cylinder (62a) and the impeller integrally as the first coupling member is rotated and thus its outer circumferential portion simultaneously contacts with the first and the second coupling members.