US 12,231,022 B2
Electric machine
Emil Håkansson, Gothenburg (SE); Johan Andersson, Gothenburg (SE); and Joakim Ehn, Gothenburg (SE)
Assigned to Volvo Car Corporation, Gothenburg (SE)
Filed by Volvo Car Corporation, Gothenburg (SE)
Filed on Jun. 10, 2022, as Appl. No. 17/837,313.
Claims priority of application No. 21179248 (EP), filed on Jun. 14, 2021.
Prior Publication US 2022/0399778 A1, Dec. 15, 2022
Int. Cl. H02K 7/00 (2006.01); H02K 9/19 (2006.01); B60L 50/60 (2019.01)
CPC H02K 7/003 (2013.01) [H02K 9/19 (2013.01); B60L 50/60 (2019.02)] 14 Claims
OG exemplary drawing
 
1. A rotor assembly for an electric machine, the rotor assembly comprising:
a body member;
a first shaft member;
a second shaft member; and
a hub element;
the body member comprising an inner wall defining a cavity inside the body member;
the first shaft member being inserted into the body member and extending at least partially in the cavity of the body member;
the second shaft member being inserted into the body member and extending from a first end portion of the body member to a second end portion of the body member;
the second shaft member being at least partially surrounded by the first shaft member;
the first shaft member being configured to provide a medium along the inner wall of the body member;
the second shaft member being configured to provide the medium at each of the first end portion and the second end portion of the body member; and
the hub element being configured to provide the medium separately through the first shaft member and the second shaft member.