Apparatus for winding poles of cores of dynamo electric machines

An apparatus (1) for winding a plurality of coils (B) of a wire conductor (W) around respective radial poles (10c) of a core (10) of a dynamo electric machine component arranged according to respective radial directions (110c), the coils (B) being formed by a plurality of turns (S) of the wire conductor (W), each of the plurality of turns (S) comprising two opposite longitudinal stretches, each of the two opposite longitudinal stretches being positioned in a respective slot (10a, 10b), and the two opposite longitudinal stretches of each of the turns being positioned adjacent to respective axial ends (A, A′) of the radial pole (10c), the apparatus (1) comprising:

• a wire dispenser arm (11) configured to rotate about one of the radial poles (10c) at a time to dispense the wire conductor (W) forming the turns (S);
• a first wire guide (32) configured to be selectively positioned at a first axial end (A) of the radial pole (10c) and to move, during winding, along a moving direction (132a, 132b) parallel to the radial direction (110c) of the radial pole (10c) to assist in forming the respective coil (B);
• a second wire guide (36) configured to be positioned and moved at a first slot (10a) adjacent to the radial pole (10c) undergoing winding;
• a third wire guide (37) configured to be positioned and moved at a second slot (10b) adjacent to the radial pole (10c) undergoing winding, wherein the second wire guide (36) and the third wire guide (37) are arranged relative to the first wire guide (32) to define at least one respective passageway (38a, 38b, 38′a, 38′b) through which the wire conductor (W) passes during winding;
• wherein the first, second and third wire guides (32, 36, 37) are each configured to move independently of one another;
• and
• wherein the second wire guide (36) includes at least one first guide portion (35a, 35b), and the third wire guide (37) includes at least one second guide portion (35′a, 35′b), each of the first and second guide portions being configured to protrude toward the first wire guide (32),
• the first and second guide portions (35a, 35b, 35′a, 35′b) include portions that each extend toward and are coplanar with one another, partially overlapping the radial pole (10c) when viewed in an axial direction, and being configured to at least partially close the respective passageway (38a, 38b, 38′a, 38′b) during winding of the radial pole (10c),
• such that the wire conductor (W) is prevented from withdrawing into the the respective passageway (38a, 38b) when moving from an edge (36a) of the second wire guide (36) to an edge (32a) of the first wire guide (32), or from the edge (32a) of the first wire guide (32) to an edge (37a) of the third wire guide (37), due to a presence of the first and second guide portions (35a, 35b, 35′a, 35′b).