A hub of a fan wheel with improved attachment for a metal case. The fan wheel
is
composed of a hub with a storage portion and a plurality of blades arranged around
circumference of the hub. A metal case with a magnetic part is disposed in the
storage portion of the hub. A plurality of blocking chunks is disposed in the end
side of the storage portion of the hub, and at least one hook is disposed at proper
position in the end side of the storage portion of the hub. A plurality of ribs
is disposed inside the storage portion of the hub. The metal case has a penetrated
hole with a stopper in one end of the penetrated hole. A recess is set between
the stopper and the magnetic part. Therefore, when the metal case is disposed in
the storage portion, by hooking the hook in the end side of the storage portion
of the hub in the recess between the magnetic part and the stopper and positioning
the metal case with blocking chunks and ribs, the metal case is firmly attached
in the storage portion of the hub so as to improve attachment and facilitate manufacture.
