| 摘要 |
An apparatus for reducing a noise and a vibration of a drain pump, including: a rotor rotated by a mutual interaction with a stator; a rotational shaft rotated by being directly combined to the rotor; a coupling cylinder combined to an end portion of the rotational shaft; a coupling tap protrusively formed on an outer circumferential portion of the coupling cylinder; an impeller including a receiving portion in which the coupling cylinder is received and being rotated by receiving a rotation force from the rotational shaft; an impeller tap protrusively formed on an inner circumferential portion of the receiving portion in the impeller and positioned at a predetermined part of a rotation trajectory of the coupling tap so as to contact with the coupling tap; and a buffer member of a ring shape with a gap therein located on a rotational path of the coupling tap to move along with the coupling tap in order to buffer between the coupling tap and the impeller tap when the two taps contact to each other. The two taps contact to each other in a circumferential direction of the coupling cylinder to transmit the rotational force, and the buffer member is disposed between the impeller tap and the coupling tap to alleviate the impact generated in coupling. Therefore, the parts can be prevented from breaking down, the noise and the vibration can be minimized in coupling, and the pumping performance can be highly improved. Other embodiments employ repellent magnetic members for buffering the rotational contact.
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