US 10,309,406 B2Granted

Centrifugal blowing fan

AssigneeMINEBEA MITSUMI Inc.

InventorKazuhiko Fujita

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Abstract

A centrifugal blowing fan comprises a back yoke made from metal, having a substantially bottomed cylindrical portion around a rotating shaft of a motor, an inner surface attached with a magnet of the motor mounted thereon and a flange portion disposed around a periphery of an opening of the cylindrical portion; and a cylindrical impeller made from resin, having a plurality of blades circumferentially arranged, an annular collar portion joined with first ends of the plurality of blades and a doughnut-shaped disk portion joined with second ends of the plurality of blades, wherein the disk portion has at least one fitting, and the flange portion has at least one fitted space receiving the at least one fitting so as to concentrically and fixedly connect the impeller 16 and the back yoke.

Claims4

Dependent claims

A centrifugal blowing fan comprising:

a casing having an air inlet and an air outlet;
a motor disposed in the casing, the motor comprising:
a rotating shaft,
a back yoke made of a metal having a cylindrical portion and a flange portion disposed around a periphery of an opening of the cylindrical portion, wherein a plurality of holes are provided with the flange portion, and
a magnet attached with an inner surface of the cylindrical portion of the back yoke;
and
an impeller disposed in the casing and made of a resin comprising:
a plurality of blades circumferentially arranged, and
at least one portion which is able to abut with the flange portion of the back yoke and is provided with a plurality of protrusions,
wherein each of the protrusions is able to be inserted through each of the holes, and each tip of the protrusions protruded from a lower side surface of the flange portion toward a lower direction opposite to the air inlet of the casing along an axial direction of the rotating shaft,
wherein each tip of the protrusions is able to be swaged so that the impeller is connected with the flange portion of the back yoke, and
wherein the flange portion of the back yoke has an outer diameter which is equal to or larger than an outer diameter of the at least one portion of the impeller.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/160,320Filed 20 May 2016 · continuation
Priority: JP 2012-12230029 May 2012
Published: US 2016/0265543 A115 Sep 2016
Granted: 4 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F04D 25/0613
The electric motor being specially adapted for integration in the pump: the electric motor being of the inside-out type, i.e. the rotor is…
F04D 17/16
Centrifugal pumps: for displacing without appreciable compression
F04D 29/056
Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps: bearings
F04D 29/282
For fans or blowers: the leading edge of each vane being substantially parallel to the rotation axis

Family

Application13/903,532Parent of this continuation · filed 28 May 2013
US 2016/0265543 A1Pre-grant publication · published 15 Sep 2016
US 9,371,840 B2Parent of this continuation
US 2013/0323040 A1Published application
US 10,309,406 B2This patent

From the US filing history. Foreign family members aren’t listed.

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