US 11,658,525 B2
Electric motor assembly using polymer-only fastening and methods of manufacturing the same
Anthony M. Coppola, Rochester Hills, MI (US); Alireza Fatemi, Canton, MI (US); William T. Ivan, Shelby Township, MI (US); Song He, Troy, MI (US); and Yew Sum Leong, Northville, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Oct. 9, 2020, as Appl. No. 17/66,520.
Prior Publication US 2022/0115922 A1, Apr. 14, 2022
Int. Cl. H02K 1/18 (2006.01); H02K 1/20 (2006.01); H02K 15/12 (2006.01); H02K 11/01 (2016.01); H02K 15/02 (2006.01); H02K 9/19 (2006.01)
CPC H02K 1/185 (2013.01) [H02K 1/20 (2013.01); H02K 9/19 (2013.01); H02K 11/014 (2020.08); H02K 15/028 (2013.01); H02K 15/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electric motor assembly, comprising:
a housing having a generally cylindrical inner surface defining a generally cylindrical cavity within the housing;
a stator operatively disposed within the generally cylindrical cavity, the stator comprising a plurality of stacked laminations wherein each lamination has an outer circumferential edge and a plurality of finger elements extending inward toward a center of the lamination;
a layer of polymer disposed between a generally cylindrical outer surface of the stator and the generally cylindrical inner surface of the housing, such that the stator is bonded to the housing by the polymer; and
an arcuate metallic strip circumferentially disposed within the layer of polymer, wherein the arcuate metallic strip is configured as one of (i) a flat shape configuration wherein the arcuate metallic strip is spaced apart from both the stator and the housing, and (ii) a wavy shape configuration wherein the arcuate metallic strip is disposed in contact with only one of the stator and the housing or neither of the stator and the housing, wherein the arcuate metallic strip is formed integral with an outer circumferential edge of one of the laminations.