Abstract: Provided is a stator assembly apparatus configured to assemble a stator, the apparatus including: a plurality of guide members that are provided in a manner enabling insertion into and withdrawal from inside the electrically-insulating members in a central axial direction of the stator core, and are arranged in a radial direction of the slots in a state of having been inserted inside the electrically-insulating members; a presser configured to press the coil radially outward with respect to the stator core; and a controller configured to control movement of the plurality of guide members. Each time the coil moved by the presser come into contact with or approaches the guide member positioned most radially inside from among the plurality of guide members inside the electrically-insulating members, the controller causes the guide member positioned most radially inside to move so as to sequentially withdraw from within the electrically-insulating members.

Abstract: A coil insertion apparatus includes a coil diameter expander that expands a diameter of a coil assembly in a wound state from inside a stator core to insert the coil assembly into slots of the stator core, the coil diameter expander including a coil end pressing part that presses coil ends of the coil assembly from inside toward outside to expand the diameter, and a coil straight part pressing part that presses coil straight parts of the coil assembly to be inserted into the slots from inside toward outside to expand the diameter.

Abstract: Provided is a coil insertion device for inserting a wound coil into slots formed in a stator core and opening to a through-hole of the stator core, by placing the coil in the through-hole, and by expanding the coil to move the coil from inside toward outside with respect to the stator core. The coil insertion device includes a coil expander having a plurality of piece members arranged in an annular shape. The plurality of piece members are movable between a first position where the plurality of piece members are reduced in diameter so as to be insertable inside the wound coil, and a second position where the plurality of piece members are expanded in diameter from the first position to press the wound coil from inside toward outside, thereby inserting the wound coil into the slots at once.

Abstract: There are provided first guide members inserted into the insides of the insulating members in the slots, second guide members inserted into the insides of the insulating members and onto outer sides relative to the first guide members in a radial direction in the slots, and a controller controlling movement of each of the first guide members and the second guide members. After the first guide member moves outward in the radial direction in the slot until coming into contact with or close to a second guide member, the plurality of second guide members are caused to sequentially move to an outer side of the stator core in the central axis direction in order with the second guide member closest to the first guide members first and retreat from the slot as the coil is moved outward in the radial direction by the pressers.

Abstract: A coil insertion guide device includes a plurality of guide portions arranged over each of axially opposite end faces of a stator core including insulating members in slots, the guide portions being configured to guide movement of a strip-shaped coil insertable into the slots along a radial direction of the stator core, the strip-shaped coil includes a plurality of straight portions insertable into the slots and a plurality of coil end portions each connecting adjacent straight portions to each other among the plurality of straight portions, and in each of the guide portions, a shoulder portion that comes into contact with the coil end portion of the strip-shaped coil has a convex curved surface that is continuous from a top to a maximum width portion.

Abstract: A coil insertion device includes coil diameter expanders, the coil diameter expanders being configured to insert a coil assembly in a wound state into slots of a stator core by expanding the coil assembly in diameter from inside of the stator core, each of the coil diameter expanders includes: a coil presser that is arranged inside the coil assembly and presses coil end portions of the coil assembly outward from inside to expand the coil end portions in diameter; and a restrictor that is arranged outside the coil assembly, restricts outward movement of the coil end portions expanded in diameter by the coil presser, and sandwiches the coil end portions of the coil assembly inserted in the slots with the coil presser.

Abstract: An insulating paper sheet has a cuff portion protruding from an axial end face of a stator core. The coil mounting apparatus includes a stator core fixing jig, a coil winding jig that is arranged inside the stator core and has thereon an annularly wound belt-shaped coil, and a cuff guide that is provided on the stator core fixing jig and has a guide groove for supporting the cuff portion. The guide groove includes a cuff portion-supporting sub-groove that supports the cuff portion from both sides in a circumferential direction of the stator core, and a coil-guiding sub-groove that is located further away from the axial end face of the stator core than the cuff portion-supporting sub-groove and that has a groove width smaller than that of the cuff portion-supporting sub-groove.

Abstract: Provided is a coil insertion device for inserting a wound coil into slots formed in a stator core and opening to a through-hole of the stator core, by placing the coil in the through-hole, and by expanding the coil to move the coil from inside toward outside with respect to the stator core. The coil insertion device includes a coil expander having a plurality of piece members arranged in an annular shape. The plurality of piece members are movable between a first position where the plurality of piece members are reduced in diameter so as to be insertable inside the wound coil, and a second position where the plurality of piece members are expanded in diameter from the first position to press the wound coil from inside toward outside, thereby inserting the wound coil into the slots at once.

Abstract: A coil mounting device includes a stator coil, a coil winding jig that has an outer diameter smaller than an inner diameter of the stator core and winds therearound a belt-shaped coil in an annular shape, a stator core fixing jig that fixes the stator core at a predetermined position and in a predetermined posture, and a coil expansion mechanism that expands the belt-shaped coil. The coil expansion mechanism includes a holder that holds the coil winding jig inside the stator core in a state where the inter-comb-teeth grooves are matched in phase with the slots, and a coil expander that expands the belt-shaped coil by pressing a portion nearer to a side end than the straight portions of the belt-shaped coil wound around the coil winding jig held by the holder so as to expand the portion, thereby inserting the straight portions into the slots.

Abstract: A coil strand is wound on an insulator to produce a divided core member, and then the divided core member is placed on a table. While the table rotates about its axis, ends of the coil strands are inserted into lead end holding grooves, which are defined in a surface of the insulator on an outer circumferential edge of a stator and which extend along a circumferential direction of the stator.

Abstract: A coil strand is wound on an insulator to produce a divided core member, and then the divided core member is placed on a table. While the table rotates about its axis, ends of the coil strands are inserted into lead end holding grooves, which are defined in a surface of the insulator on an outer circumferential edge of a stator and which extend along a circumferential direction of the stator.