Patent ID: 6802699
Filing Date: 2004-10-12
Classification: F04D

Abstract:
A motor mounting structure comprising:a scroll casing adopted to surround a fan; a bracket adopted to mount a motor, which drives the fan; an insertion hole formed on the scroll casing for inserting the fan therethrough; a ring-like rib erected on an inner circumferential edge of the insertion hole; a side wall disposed to the bracket in a manner to face the ring-like rib; a helical groove portion formed in one of an outer surface of the side wall and an inner surface of the ring-like rib; and a protruding portion engaging with the helical groove portion formed in the other of the outer surface of the side wall and the inner surface of the ring-like rib, wherein the bracket is attached onto the scroll casing by screwing the bracket into the scroll casing in a direction opposite to a direction of rotation of the fan, and in a state that the helical groove portion and the protruding portion are engaged with each other.