Patent ID: 11936263
Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A stator assembly for a motor, comprising:
an iron core including 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, the iron core further comprising:
a plurality of stator laminate sheets each having an annular laminate sheet body and a plurality of laminate sheet teeth protruding from the laminate sheet body toward an inner radial side;
a first stator end pressing plate and a second stator end pressing plate, the plurality of stator laminate sheets being disposed therebetween in an axial direction, wherein the first and the second end pressing plates each have an annular end pressing plate body and a plurality of end pressing plate teeth protruding from the end pressing plate body, wherein the cylindrical body portion of the iron core is formed by laminating the end pressing plate body of the end pressing plates and the laminate sheet body of the stator laminate sheets together in the axial direction, and the tooth portions of the iron core are formed by laminating the end pressing plate teeth and the laminate sheet teeth together in the axial direction;

a plurality of conductor slots extending along a radial direction, wherein each conductor slot is formed between every two tooth portions of the iron core that are adjacent in a circumferential direction;
a plurality of conductors disposed within each of the conductor slots and arranged along the radial direction;
a plurality of slot wedges, wherein one slot wedge of the plurality of slot wedges is disposed in each of the conductor slots, wherein the slot wedges are located on the inner radial side of the iron core; and
a first slot wedge pressing ring and a second slot wedge pressing ring fixedly installed to the tooth portions of the iron core on the inner radial side and arranged to secure the conductors and slot wedges within the conductor slots,
wherein the first and the second stator end pressing plates have a first inner diameter and the plurality of stator laminate sheets have a second inner diameter less than the first inner diameter such that a first stepped structure is formed on one axial end between the first stator end pressing plate and one of the stator laminate sheets and a second stepped structure is formed on an opposite axial end between the second stator end pressing plate and one of the stator laminate sheets.