US 12,463,495 B2
Electric machine, method for producing an electric machine, and electrically operable powertrain
Bernhard Linz, Wilhelmsdorf (DE); and Robert Schieck, Nuremberg (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/034,126
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Oct. 8, 2021, PCT No. PCT/DE2021/100816
§ 371(c)(1), (2) Date Apr. 27, 2023,
PCT Pub. No. WO2022/089684, PCT Pub. Date May 5, 2022.
Claims priority of application No. 102020128343.1 (DE), filed on Oct. 28, 2020.
Prior Publication US 2023/0396118 A1, Dec. 7, 2023
Int. Cl. H02K 5/16 (2006.01); F16C 19/06 (2006.01); F16C 19/54 (2006.01); F16C 25/08 (2006.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01)
CPC H02K 5/1732 (2013.01) [F16C 19/06 (2013.01); F16C 19/54 (2013.01); F16C 25/083 (2013.01); H02K 7/083 (2013.01); F16C 2380/26 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electric machine for use within a powertrain of a hybrid or fully electrically driven motor vehicle, comprising: a stator and a rotor which is separated from the stator by an air gap, said stator and rotor being accommodated in a motor housing, wherein the rotor is rotatably mounted relative to the stator with two axially spaced rolling bearings, wherein at least one of the rolling bearings is axially prestressed by a spring element supported against the motor housing in an axial direction and against the at least one prestressed rolling bearing, wherein the at least one prestressed rolling bearing has an inner ring and an outer ring, between which a plurality of rolling bodies are accommodated in a rollable manner, and the inner ring is connected in a rotationally fixed manner to the rotor via a first bearing seat and the outer ring is connected in a rotationally fixed manner to the motor housing via a second bearing seat, wherein the spring element is arranged on the first bearing seat or the second bearing seat so as to be secured in the axial direction in a form-fitting manner, and wherein at least one of:
a) the outer ring of the prestressed rolling bearing has an outer ring diameter and the spring element has a spring outer diameter, wherein the spring outer diameter is larger than the outer ring diameter of the prestressed rolling bearing and the second bearing seat has a first undercut in a region of the spring element having an undercut diameter that is larger than the outer ring diameter, whereby the spring element is captively accommodated in the first undercut and the prestressed rolling bearing projects in the axial direction into a region of the first undercut,
or
b) the inner ring of the prestressed rolling bearing has an inner ring diameter and the spring element has a spring inner diameter, wherein the spring inner diameter is smaller than the inner ring diameter of the prestressed rolling bearing and the first bearing seat has a second undercut in a region of the spring element having an undercut diameter that is smaller than the inner ring diameter, whereby the spring element is captively accommodated in the second undercut and the prestressed rolling bearing projects in the axial direction into a region of the second undercut.