Ventilation device

Patent metadata

Field	Value
Publication number	US-9835175-B2
Application number	US-201314386413-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Mar 22, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A ventilation device includes a fan propeller ( 3 ) and a motor ( 5 ) with an external rotor ( 7 b ) for driving the propeller ( 3 ). The propeller ( 3 ) includes a central hub ( 11 ) having a frontal wall ( 17 ) and an internal first lateral wall ( 21 ) defining an accommodating housing for the external rotor ( 7 b ). The external rotor ( 7 b ) has a front part ( 9 ) and a second lateral wall ( 9 ″) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ). The ventilation device further includes a device for snap-fitting over the internal first lateral wall ( 21 ) to secure the external rotor ( 7 b ) to the central hub ( 11 ).

First claim

The invention claimed is:

1. A ventilation device comprising a fan propeller ( 3 ) and a motor ( 5 ) with an external rotor ( 7 b ) for driving the propeller ( 3 ), the propeller ( 3 ) comprising a central hub ( 11 ) having a frontal wall ( 17 ) and an internal first lateral wall ( 21 ) defining an accommodating housing for the external rotor ( 7 b ), and the external rotor ( 7 b ) having a front part ( 9 ) and a second lateral wall ( 9 ″) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ),
wherein the device further comprises means ( 27 ) for snap-fitting over the internal first lateral wall ( 21 ) to secure the external rotor ( 7 b ) to the central hub ( 11 );
wherein the snap-fitting means ( 27 ) comprise a ring ( 29 ) mounted on the external rotor ( 7 b ) and provided with a plurality of elastically deformable clamps ( 31 ), each of the clamps ( 31 ) comprising, respectively, a first branch ( 33 a ) bearing against the second lateral wall ( 9 ″) of the external rotor ( 7 b ) and a second branch ( 33 b ) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ), so as to clamp together the external rotor ( 7 b ) and the central hub ( 11 ); and
wherein the external rotor ( 7 b ) comprises a plurality of magnets and each of the clamps ( 31 ) is arranged in a corresponding space between two of the plurality of magnets.

2. The device as claimed in claim 1 , wherein the central hub ( 11 ) comprises a plurality of accommodating housings ( 35 ) for the second branches ( 33 b ), each second branch having a corresponding one of the plurality of accommodating housings ( 35 ).

3. The device as claimed in claim 2 , wherein the housings ( 35 ) of the central hub ( 11 ) respectively comprise at least one snap-fitting hook ( 37 ) corresponding to a respective at least one orifice in a corresponding second branch of the plurality of second branches ( 33 b ), wherein the at least one hook ( 37 ) engages the at least one orifice.

4. The device as claimed in claim 2 , wherein the second branches ( 33 b ) respectively comprise at least one snap-fitting hook ( 37 ), and wherein the housings ( 35 ) of the central hub ( 11 ) respectively comprise at least one orifice corresponding to a respective at least one snap fitting hook in a corresponding second branch of the plurality of branches, wherein the at least one hook ( 37 ) engages the at least one orifice.

5. A ventilation device comprising a fan propeller ( 3 ) and a motor ( 5 ) with an external rotor ( 7 b ) for driving the propeller ( 3 ), the propeller ( 3 ) comprising a central hub ( 11 ) having a frontal wall ( 17 ) and an internal first lateral wall ( 21 ) defining an accommodating housing for the external rotor ( 7 b ), and the external rotor ( 7 b ) having a front part ( 9 ) and a second lateral wall ( 9 ″) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ),
wherein the device further comprises means ( 27 ) for snap-fitting over the internal first lateral wall ( 21 ) to secure the external rotor ( 7 b ) to the central hub ( 11 ),
wherein the snap-fitting means ( 27 ) comprise a ring ( 29 ) mounted on the external rotor ( 7 b ) and provided with a plurality of elastically deformable clamps ( 31 ), each of the clamps ( 31 ) comprising, respectively, a first branch ( 33 a ) bearing against the second lateral wall ( 9 ″) of the external rotor ( 7 b ) and a second branch ( 33 b ) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ), so as to clamp together the external rotor ( 7 b ) and the central hub ( 11 ), and
wherein the central hub ( 11 ) comprises a plurality of accommodating housings ( 35 ) for the second branches ( 33 b ), each second branch having a corresponding one of the plurality of accommodating housings ( 35 ).

6. The device as claimed in claim 5 , wherein each of the housings ( 35 ) of the central hub ( 11 ) respectively comprise at least one snap-fitting hook ( 37 ) corresponding to a respective at least one orifice in a corresponding second branch of the plurality of second branches ( 33 b ), wherein the at least one hook ( 37 ) engages the at least one orifice.

7. The device as claimed in claim 5 , wherein the second branches ( 33 b ) respectively comprise at least one snap-fitting hook ( 37 ), and wherein each of the housings ( 35 ) of the central hub ( 11 ) respectively comprise at least one orifice corresponding to a respective at least one snap fitting hook in a corresponding second branch of the plurality of second branches, wherein the at least one hook ( 37 ) engages the at least one orifice.

8. A ventilation device comprising a fan propeller ( 3 ) and a motor ( 5 ) with an external rotor ( 7 b ) for driving the propeller ( 3 ), the propeller ( 3 ) comprising a central hub ( 11 ) having a frontal wall ( 17 ) and an internal first lateral wall ( 21 ) defining an accommodating housing for the external rotor ( 7 b ), and the external rotor ( 7 b ) having a front part ( 9 ) and a second lateral wall ( 9 ″) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ),
wherein the device further comprises means ( 27 ) for snap-fitting over the internal first lateral wall ( 21 ) to secure the external rotor ( 7 b ) to the central hub ( 11 ),
wherein the snap-fitting means ( 27 ) comprise a ring ( 29 ) mounted on the external rotor ( 7 b ) and provided with a plurality of elastically deformable clamps ( 31 ), each of the clamps ( 31 ) comprising, respectively, a first branch ( 33 a ) bearing against the second lateral wall ( 9 ″) of the external rotor ( 7 b ) and a second branch ( 33 b ) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ), so as to clamp together the external rotor ( 7 b ) and the central hub ( 11 ), and
wherein each of the second branches ( 33 b ) has a substantially bent-back end ( 41 ).

9. A ventilation device comprising a fan propeller ( 3 ) and a motor ( 5 ) with an external rotor ( 7 b ) for driving the propeller ( 3 ), the propeller ( 3 ) comprising a central hub ( 11 ) having a frontal wall ( 17 ) and an internal first lateral wall ( 21 ) defining an accommodating housing for the external rotor ( 7 b ), and the external rotor ( 7 b ) having a front part ( 9 ) and a second lateral wall ( 9 ″) bearing against the internal first lateral wall ( 21 ) of the central hub ( 11 ),
wherein the device further comprises means ( 27 ) for snap-fitting over the internal first lateral wall ( 21 ) to secure the external rotor ( 7 b ) to the central hub ( 11 );
additional means for securing the motor ( 5 ) and the central hub ( 11 ) in rotation; and
wherein the central hub ( 11 ) has a predefined number of cylindrical bosses, and wherein the front part ( 9 ) of the external rotor ( 7 b ) has complementary emergent holes into which the cylindrical bosses are inserted.

10. The device as claimed in claim 9 , wherein the frontal wall ( 17 ) of the central hub ( 11 ) comprises radial protuberances ( 43 ) that engage with complementary notches ( 45 ) provided on the front part ( 9 ) of the external rotor ( 7 b ), wherein the central hub ( 11 ) has a predefined number of cylindrical bosses, and wherein the front part ( 9 ) of the external rotor ( 7 b ) has complementary emergent holes into which the cylindrical bosses are inserted.

Assignees

• Valeo Systemes Thermiques

Inventors

• Crevel Herve
• Bonneau David

Classifications

• F04D19/002

  Axial flow fans · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• F24F7/007

  with forced flow (using ducting systems F24F7/06) · CPC title

• F04D29/329

  Details of the hub · CPC title