US 11,936,263 B2
Stator assembly and stator for motor
Yu Gong, Shanghai (CN); and Lei Liu, Shanghai (CN)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/627,709
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jul. 17, 2019, PCT No. PCT/CN2019/096352
§ 371(c)(1), (2) Date Jan. 17, 2022,
PCT Pub. No. WO2021/007804, PCT Pub. Date Jan. 21, 2021.
Prior Publication US 2022/0255388 A1, Aug. 11, 2022
Int. Cl. H02K 3/487 (2006.01)
CPC H02K 3/487 (2013.01) [H02K 2213/03 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A stator assembly for a motor, comprising
an iron core comprising a cylindrical body portion and a plurality of tooth portions protruding from the body portion of the iron core toward an inner radial side and arranged along a circumferential direction, a conductor slot that extends along a radial direction being formed between every two tooth portions of the iron core adjacent in the circumferential direction;
a plurality of conductors accommodated and installed in each of the conductor slots, and being arranged along the radial direction;
slot wedges accommodated and installed in each of the conductor slots, wherein the slot wedges are located on the inner radial sides of the plurality of conductors in each of the conductor slots; and
slot wedge pressing rings fixedly installed to the tooth portions of the iron core on the inner radial side, and interfering with a part of each of the slot wedges from the inner radial side in the radial direction, the conductors and the slot wedge pressing rings thus limiting the slot wedges in the radial direction,
wherein:
the iron core comprises a plurality of stator laminate sheets and two stator end pressing plates laminated together in an axial direction while being aligned with each other,
each of the stator end pressing plates comprises an annular end pressing plate body and a plurality of end pressing plate teeth protruding from the end pressing plate body toward the inner radial side and arranged along the circumferential direction,
each of the stator laminate sheets comprises an annular laminate sheet body and a plurality of laminate sheet teeth protruding from the laminate sheet body toward the inner radial side and arranged along the circumferential direction, and
an inner radial end of each of the end pressing plate teeth is closer to an outer radial side than the inner radial end of the corresponding laminate sheet tooth, such that the end pressing plate teeth and the laminate sheet teeth form a stepped structure of the tooth portions of the iron core for installation of the slot wedge pressing rings.