Coil segment positioning method, coil segment positioning tool, and coil segment positioning apparatus

A coil segment positioning method for positioning a plurality of distal end pairs of coil segments protruding from an end face of a core, each of the distal end pairs being constituted by a pair of distal end portions facing each other in a radial direction of the core among distal end portions of the coil segments, the method comprising:

• preparing a first member with first insertion holes each configured to separately accept insertion of one of the distal end pairs, the first insertion holes being arranged in lines along a circumferential direction of the core to form a plurality of rows in the radial direction, and a second member with second insertion holes corresponding to the first insertion holes of the first member;
• inserting the distal end pairs with positions thereof adjusted to an extent that the distal end pairs can be inserted into the first insertion holes and the second insertion holes, into the first insertion holes of the first member and the second insertion holes of the second member, the second member being disposed to overlap with the first member in an axial direction of the core;
• and
• aligning positions, in the circumferential direction, of the distal end portions constituting the distal end pairs inserted into the first insertion holes and the second insertion holes, by rotating at least the first member around an axis of the core to narrow a region in which the first insertion holes and the second insertion holes overlap with each other in the axial direction of the core,
• wherein the first member is closer to the core than the second member, and
• wherein inner surfaces of the first insertion holes include curved surfaces that extend backward, on a side closer to the core, with respect to a direction of rotation of the first member in the rotating of the first member and the first insertion holes.

A coil segment positioning tool comprising:

• a first member with first insertion holes each configured to separately accept insertion of one of distal end pairs each constituted by a pair of distal end portions facing each other in a radial direction of a core among distal end portions of coil segments protruding from an end face of the core, the first insertion holes being arranged in lines in a circumferential direction of the core to form a plurality of rows in the radial direction;
• and
• a second member with second insertion holes corresponding to the first insertion holes of the first member, configured to be disposed to overlap with the first member in an axial direction of the core in a state where the distal end pairs are inserted into the first insertion holes and the second insertion holes,
• wherein the first member and/or the second member is rotatable around an axis of the core in a direction to narrow first regions in which the first insertion holes and the second insertion holes respectively overlap with each other in the axial direction of the core,
• the first member comprises one or more third insertion holes each configured to accept insertion of one of one or more stand-alone distal end portions that are distal end portions not constituting the distal end pairs among the distal end portions of the coil segments protruding from the end face of the core, and the second member comprises one or more fourth insertion holes each configured to accept insertion of one of the stand-alone distal end portions, and
• when the first member and/or the second member is rotated to a position at which the distal end pairs inserted in the first insertion holes and the second insertions holes are constrained by the first insertion holes and the second insertions holes in the first regions, respective second regions in which the third insertion holes and the fourth insertion holes respectively overlap with each other in the axial direction of the core are larger than the first regions in length along a circumferential direction of the core.

A coil segment positioning tool comprising:

• a first member with first insertion holes each configured to separately accept insertion of one of distal end pairs each constituted by a pair of distal end portions facing each other in a radial direction of a core among distal end portions of coil segments protruding from an end face of the core, the first insertion holes being arranged in lines in a circumferential direction of the core to form a plurality of rows in the radial direction;
• and
• a second member with second insertion holes corresponding to the first insertion holes of the first member, configured to be disposed to overlap with the first member in an axial direction of the core in a state where the distal end pairs are inserted into the first insertion holes and the second insertion holes,
• wherein at least the first member is rotatable around an axis of the core in a direction to narrow a first region in which the first insertion holes and the second insertion holes overlap with each other in the axial direction of the core,
• wherein the first member is configured to be positioned closer to the core than the second member when accepting the distal end pairs into the first insertion holes, and
• wherein inner surfaces of the first insertion holes include curved surfaces that extend backward, on a side closer to the core when accepting the distal end pairs, with respect to the direction of rotation of the first member, to narrow the first region, in the rotating of the first member and the first insertion holes.