Method and apparatus for manufacturing stator
A method of manufacturing a stator that includes a tubular-shaped stator core and a tubular-shaped coil. The method includes: (a) a holding step of holding an insulation sheet, which is disposed in a slot provided in the stator core, by causing a pressing device to press the insulation sheet against an inner surface of the slot in an axial end portion of the stator core; (b) an inserting step of inserting a segment portion of the coil to an inside of the insulation sheet from a side of the axial end portion of the stator core, in a position distant from the pressing device that presses the insulation sheet against the inner surface of the slot; and (c) a retracting step of retracting the pressing device by extracting the pressing device from the slot, after the inserting step. Also disclosed is an apparatus for manufacturing the stator.
1 . A method of manufacturing a stator that includes a tubular-shaped stator core and a tubular-shaped coil,
the method comprising:
a holding step of holding an insulation sheet, which is disposed in a slot provided in the stator core, by causing a pressing device to press the insulation sheet against an inner surface of the slot in an axial end portion of the stator core;
a first inserting step of inserting a first segment portion of the coil to an inside of the insulation sheet from a side of the axial end portion of the stator core, in a position distant from the pressing device that presses the insulation sheet against the inner surface of the slot;
a retracting step of retracting the pressing device by extracting the pressing device from the slot, after the first inserting step;
a second inserting step, which is implemented after implementation of the first inserting step, to insert a second segment portion of the coil that is other than the first segment portion, to the inside of the insulation sheet, in a position in which the pressing device has been extracted from the slot in the retracting step.
2 . The method according to claim 1 ,
wherein the holding step is implemented by causing the pressing device to press the insulation sheet against a pair of side surfaces as portions of the inner surface of the slot which are opposed to each other in a circumferential direction of the stator core.
3 . The method according to claim 2 ,
wherein the holding step is implemented by causing the pressing device to press the insulation sheet against the pair of side surfaces, on a side of one of inner and outer circumferential surfaces of the stator core in which the slot opens.
4 . The method according to claim 1 ,
wherein the holding step is implemented by causing the pressing device to press the insulation sheet against a bottom surface as a portion of the inner surface of the slot which connects between ends of a pair of side surfaces as portions of the inner surface of the slot which are opposed to each other in a circumferential direction of the stator core.
5 . The method according to claim 1 ,
wherein the pressing device includes a generally-U-shaped pivot member including a first extending portion, a second extending portion and a connecting portion connecting between the first and second extending portions, such that the pivot member is pivotable about a pivot axis which is located in the connecting portion and which is parallel to the inner surface of the slot and an axially end surface of the stator core, and
wherein the holding step is implemented by moving the pivot member from outside of the stator core in an axial direction of the stator core toward the stator core, such that the first extending portion is brought into contact with the axially end surface of the stator core whereby the pivot member is pivoted about the pivot axis so as to cause the second extending portion to press the insulation sheet against the inner surface of the slot.