Vehicular AC current generator rotor having field-coil winding finishing-end hook portions

A rotor for a vehicular alternating current generator, comprising:

• a rotary shaft;
• a field core press-fitted around the rotary shaft;
• an insulating bobbin fitted around the field core, the insulating bobbin having a cylindrical coil-winding body and a flange extending in a radially outward direction from an axial end of the coil-winding body, the flange having a first surface and a second surface opposite to each other, the first surface being on a side of the coil-winding body and the second surface being an axial end surface of the bobbin;
• and
• a field coil wound around the coil-winding body and having a coil winding finishing end, wherein the flange is formed with a hook portion to fix the finishing end, the hook portion has a first portion protruding from an outer peripheral surface of the flange in a radial direction, a second portion extending from the second surface of the flange adjacent to the first portion, and a third portion formed along an axial end surface opposite to the flange on the second portion and extending substantially parallel to the flange, thereby defining a space between the third portion and the flange on a trailing side of the second portion with respect to a winding direction of the field coil and the finishing end extends through the space in a radially inward direction on a trailing side of the first portion with respect to the winding direction of the field coil.

A rotor for a vehicle alternating current generator, comprising:

• a rotary shaft;
• a field core fixed around the rotary shaft;
• an insulating bobbin fixed around the field core, the insulating bobbin having a cylindrical coil-winding body and a flange extending from the coil-winding body in a radially outward direction;
• and
• a field coil wound around the coil-winding body and including a coil winding finishing end, wherein
• the flange of the insulating bobbin has a first flange surface and a second flange surface opposite to each other, the first flange surface is on a side of the coil-winding body,
• the flange forms a first hook portion extending from an end of the flange in the radial direction, a second hook portion on the second flange surface, and a third hook portion axially outside of the second hook portion and defining a space between itself and the second flange surface, and
• the coil winding end is held such that the coil winding end is turned at the first hook portion, extended in a radially inward direction on a trailing side of the second hook portion with respect to a winding direction of the field coil, and further directed axially outside by the third hook portion.