Abstract: A detachment prevention portion extending in a circumferential direction of a flange portion of a bobbin from a neck portion of a locking portion provided so as to extend radially outward from the flange portion is formed such that a length by which the detachment prevention portion extends to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends to another side in the circumferential direction. Accordingly, interference between cover portions and a field coil winding or between the cover portions and a winding jig for the winding during operation of winding a lead wire of the winding can be inhibited while electric insulation between a field coil and claw-shaped magnetic poles is ensured.

Abstract: Provided is a rotary electric machine, including a pair of frames each including a cylindrical part, the cylindrical part having a fitting groove formed in an axial end portion, the pair of frames holding a stator core in an axial direction under a state in which both axial end portions of the stator core are each fitted in the fitting groove, the fitting groove having an axial surface having an annular shape opposed to an axial end surface of the stator core and a radial surface having a cylindrical shape opposed to an outer peripheral surface of the stator core, the radial surface having a recessed part recessed toward a radially outer side in a portion on the axial surface side, the cylindrical part having an inner peripheral surface opposed to a coil end, the inner peripheral surface having a large diameter part recessed toward the radially outer side.

Abstract: A vehicle rotating electrical machine has a rotor, a stator, a cooling fan provided in an axial direction end portion of the rotor and rotated integrally with the rotor, a housing, having an air intake provided opposing the cooling fan in an axial direction end portion, an annular rib provided adjacent to the air intake, and a discharge port provided across the annular rib, that houses the rotor and the stator and rotatably supports a rotary shaft, and a stay provided on a radial direction outer periphery of the housing, wherein the annular rib has an inner diameter side inclined cylindrical face, which inclines so that a diameter thereof becomes gradually smaller toward an inner side of the housing from an axial direction outer side end face of the air intake, and a sealing portion is provided between the stay and the annular rib.

Abstract: Provided is a rotary electric machine, including a pair of frames each including a cylindrical part, the cylindrical part having a fitting groove formed in an axial end portion, the pair of frames holding a stator core in an axial direction under a state in which both axial end portions of the stator core are each fitted in the fitting groove, the fitting groove having an axial surface having an annular shape opposed to an axial end surface of the stator core and a radial surface having a cylindrical shape opposed to an outer peripheral surface of the stator core, the radial surface having a recessed part recessed toward a radially outer side in a portion on the axial surface side, the cylindrical part having an inner peripheral surface opposed to a coil end, the inner peripheral surface having a large diameter part recessed toward the radially outer side.

Abstract: A detachment prevention portion extending in a circumferential direction of a flange portion of a bobbin from a neck portion of a locking portion provided so as to extend radially outward from the flange portion is formed such that a length by which the detachment prevention portion extends to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends to another side in the circumferential direction. Accordingly, interference between cover portions and a field coil winding or between the cover portions and a winding jig for the winding during operation of winding a lead wire of the winding can be inhibited while electric insulation between a field coil and claw-shaped magnetic poles is ensured.

Abstract: An output terminal portion includes: an output terminal that includes: a shaft portion on which an external screw thread portion is formed; and a head portion; and an intermediary member that includes: a fastening seat on a first axial end of which a nut portion is formed integrally, and that is mounted so as to be fitted over the shaft portion such that a second axial end protrudes axially out of a bushing, the bushing is mounted to the intermediary member such that axial movement of the bushing is constrained, and an external output wire is mounted to a second axial end surface of the fastening seat in a state of contact by a fastening force from a fixing nut that is screwed onto the external screw thread portion such that the external output wire is fixed by fastening between the fixing nut and the fastening seat.

Abstract: A vehicle rotating electrical machine has a rotor, a stator, a cooling fan provided in an axial direction end portion of the rotor and rotated integrally with the rotor, a housing, having an air intake provided opposing the cooling fan in an axial direction end portion, an annular rib provided adjacent to the air intake, and a discharge port provided across the annular rib, that houses the rotor and the stator and rotatably supports a rotary shaft, and a stay provided on a radial direction outer periphery of the housing, wherein the annular rib has an inner diameter side inclined cylindrical face, which inclines so that a diameter thereof becomes gradually smaller toward an inner side of the housing from an axial direction outer side end face of the air intake, and a sealing portion is provided between the stay and the annular rib.

Abstract: Provided is a rotating electric machine capable of preventing an outer race of a bearing from rotating because of a reduction in force for coupling a bearing housing portion and the outer race of the bearing. A resin case (24) uses thermal expansion to fill a clearance between the bearing housing portion and the outer race of a counter-driving side bearing. A hook (25) projecting inward in a radial direction is formed at least at one position on a circumferential edge portion of the resin case (24) on a side opposite to a rotor. The bearing housing portion includes a concave portion to which the hook (25) is to be locked, which is formed on a flange portion inside of which a shaft passes.

Abstract: An automotive rotary electric machine has a cooling fan including a flat ring-shaped mounting base plate fixed to a rotor, and a plurality of fan blades arranged in a row circumferentially such that each stands on a surface of the mounting base plate, the fan blades having an S-shaped cross-sectional shape that displaces gradually forward in a direction of rotation from a trailing edge that is an outer circumferential edge toward a leading edge that is an inner circumferential edge, and in which an arc shape near the trailing edge that is convex forward in the direction of rotation and an arc shape near the leading edge that is convex rearward in the direction of rotation are connected smoothly.

Abstract: An output terminal portion includes: an output terminal that includes: a shaft portion on which an external screw thread portion is formed; and a head portion; and an intermediary member that includes: a fastening seat on a first axial end of which a nut portion is formed integrally, and that is mounted so as to be fitted over the shaft portion such that a second axial end protrudes axially out of a bushing, the bushing is mounted to the intermediary member such that axial movement of the bushing is constrained, and an external output wire is mounted to a second axial end surface of the fastening seat in a state of contact by a fastening force from a fixing nut that is screwed onto the external screw thread portion such that the external output wire is fixed by fastening between the fixing nut and the fastening seat.

Abstract: Provided is a slip ring device for a rotating electric machine, which is capable of reliably retaining a long lead while preventing movement and deformation of the long lead during insert molding. The slip ring device for a rotating electric machine includes: a first ring and a second ring; a long lead (12) having one end portion connected to the first ring and another end portion connected to a rotor coil; a short lead having one end portion connected to the second ring and another end portion connected to the rotor coil; and a molded body formed by insert molding, for retaining the first ring, the second ring, the long lead (12), and the short lead in a mutually insulated fashion. The molded body includes a restricting member (15) for restricting the long lead (12) from being moved and deformed during the insert molding.

Abstract: An automotive rotary electric machine has a cooling fan including a flat ring-shaped mounting base plate fixed to a rotor, and a plurality of fan blades arranged in a row circumferentially such that each stands on a surface of the mounting base plate, the fan blades having an S-shaped cross-sectional shape that displaces gradually forward in a direction of rotation from a trailing edge that is an outer circumferential edge toward a leading edge that is an inner circumferential edge, and in which an arc shape near the trailing edge that is convex forward in the direction of rotation and an arc shape near the leading edge that is convex rearward in the direction of rotation are connected smoothly.

Abstract: Provided is a rotating electric machine capable of preventing an outer race of a bearing from rotating because of a reduction in force for coupling a bearing housing portion and the outer race of the bearing. A resin case (24) uses thermal expansion to fill a clearance between the bearing housing portion and the outer race of a counter-driving side bearing. A hook (25) projecting inward in a radial direction is formed at least at one position on a circumferential edge portion of the resin case (24) on a side opposite to a rotor. The bearing housing portion includes a concave portion to which the hook (25) is to be locked, which is formed on a flange portion inside of which a shaft passes.

Abstract: Provided is a slip ring device for a rotating electric machine, which is capable of reliably retaining a long lead while preventing movement and deformation of the long lead during insert molding. The slip ring device for a rotating electric machine includes: a first ring and a second ring; a long lead (12) having one end portion connected to the first ring and another end portion connected to a rotor coil; a short lead having one end portion connected to the second ring and another end portion connected to the rotor coil; and a molded body formed by insert molding, for retaining the first ring, the second ring, the long lead (12), and the short lead in a mutually insulated fashion. The molded body includes a restricting member (15) for restricting the long lead (12) from being moved and deformed during the insert molding.

Abstract: In order to provide a vehicle AC generator capable of easily setting an attachment direction of a battery terminal and reducing the total shaft length of the generator, in the vehicle AC generator including a case composed of a front bracket and a rear bracket, and a rotor and a stator which are arranged in the case, the vehicle AC generator includes a battery terminal arranged on an outer circumferential portion of the rear bracket, an engaging body provided on the battery terminal, and a plurality of fitting portions to which the engaging body is fitted.

Abstract: In order to provide a vehicle AC generator capable of easily setting an attachment direction of a battery terminal and reducing the total shaft length of the generator, in the vehicle AC generator including a case composed of a front bracket and a rear bracket, and a rotor and a stator which are arranged in the case, the vehicle AC generator includes a battery terminal arranged on an outer circumferential portion of the rear bracket, an engaging body provided on the battery terminal, and a plurality of fitting portions to which the engaging body is fitted.

Abstract: A vehicular alternator is provided which can suppress the vibration of a circuit board. The vehicular alternator has a rectifier that includes a plurality of diodes forming a full-wave rectifier circuit, a pair of negative and positive terminal side heat sinks that hold the diodes, and a circuit board connecting the diodes and a stator coil to one another, wherein the negative and positive terminal side heat sinks and the circuit board are mounted on a casing at a plurality of mounting portions, which are superposed with one another in an axial direction of a shaft, by using mounting members. Between adjacent ones of the mounting portions, there are formed abutment portions in which the circuit board is superposed on and placed in abutment with the negative terminal side heat sink or the positive terminal side heat sink, and the abutment portions are fixed to each other by rivets.