US 12,247,572 B2
Cooling arrangement for electric machines
Ronald D. Bremner, Cedar Falls, IA (US)
Assigned to DEERE & COMPANY, Moline, IL (US)
Filed by DEERE & COMPANY, Moline, IL (US)
Filed on Jun. 20, 2023, as Appl. No. 18/337,524.
Application 18/337,524 is a division of application No. 17/647,512, filed on Jan. 10, 2022, granted, now 11,873,826.
Claims priority of provisional application 63/154,150, filed on Feb. 26, 2021.
Prior Publication US 2023/0332610 A1, Oct. 19, 2023
Int. Cl. F04D 25/16 (2006.01); F04D 25/08 (2006.01); F04D 29/053 (2006.01); F04D 29/58 (2006.01); H02K 5/128 (2006.01); H02K 9/06 (2006.01)
CPC F04D 25/166 (2013.01) [F04D 25/082 (2013.01); F04D 29/053 (2013.01); F04D 29/5806 (2013.01); F04D 29/584 (2013.01); H02K 5/128 (2013.01); H02K 9/06 (2013.01); B60Y 2200/221 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electric machine for a work vehicle, comprising:
a housing;
a stator assembly positioned inside the housing;
a rotor assembly rotatably connected to the housing via a bearing, the rotor assembly positioned to form an air gap between the stator assembly and the rotor assembly;
a front air dam positioned at a first end of the housing and adjacent to the air gap, the front air dam including an external barrier, an internal barrier, an opening in the internal barrier, and a passageway in the internal barrier; and
a fan attached to the rotor assembly and positioned within the housing, the fan generating a first air flow towards the air gap and a second air flow through the passageway;
wherein when the rotor assembly rotates, the fan generates a third air flow into the housing through the opening in the front air dam, which directs the first air flow from the fan towards the air gap and directs the second air flow from the fan through the passageway and out of the housing.