Abstract: An on-vehicle alternator is disclosed having a rotor driven by an engine via a belt, a stator having armature windings to generate electromotive forces in response to rotating magnetic fluxes, a housing on which the stator is fixedly secured, a pulley fixedly supported on the rotor to transmit a belt drive force to the rotor, and bearings rotatably supporting the rotor and fixedly supported on the housing. The power generator also includes a bush, formed of a metallic member, which is accommodated in the housing. The bearing, disposed in an area closer to the pulley, is comprised of an inner race, an outer race and rolling elements, all of which are formed of metallic members, with the outer race being press fitted to the bush with a certain degree of interference.

Abstract: An on-vehicle alternator is disclosed having a rotor driven by an engine via a belt, a stator having armature windings to generate electromotive forces in response to rotating magnetic fluxes, a housing on which the stator is fixedly secured, a pulley fixedly supported on the rotor to transmit a belt drive force to the rotor, and bearings rotatably supporting the rotor and fixedly supported on the housing. The power generator also includes a bush, formed of a metallic member, which is accommodated in the housing. The bearing, disposed in an area closer to the pulley, is comprised of an inner race, an outer race and rolling elements, all of which are formed of metallic members, with the outer race being press fitted to the bush with a certain degree of interference.

Abstract: A vehicle alternator has an armature coil, a rectifier, and a terminal connector. The armature coil has a substantial rectangular cross-section. The rectifier rectifies a voltage induced at the armature coil. The terminal connector includes a crimping portion and a connecting portion. The crimping portion is crimped onto a lead of the armature coil. The connecting portion is fixed to an input terminal of the rectifier with a screw. The crimping portion of the terminal connector is crimped onto the lead so that two opposed surfaces of the lead have surface contact with the terminal connector.

Abstract: A rotary compressor includes a rotor rotatably disposed to be eccentric to an inner peripheral surface of a housing, a rotation shaft for transmitting rotation force of an engine to the rotor, and a connection member through which the rotation shaft is connected to the rotor so that the rotation force is transmitted from the rotation shaft to the rotor. When a rotation speed of the rotation shaft is lower than a predetermined valve, the connection member is connected to the rotation shafts at the rotation force of the rotation shaft that is transmitted to the rotor. On the other hand, when the rotation speed of the rotation shaft is equal to or higher than the predetermined value, the rotation force from the rotation shaft to the rotor is interrupted, so that the rotary compressor is stopped. Therefore, useless load applied to the engine can be restricted.

Abstract: A brushless-type alternator has a rotor, which comprises a pair of pole cores. The pole cores include a plurality of nail parts, respectively. The nail parts are arranged alternately in a rotating direction of the rotor. The nail parts are coupled to-each other with a non-magnetic ring. A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring. The permanent magnets are located radially inside or outside the non-magnetic ring.

Abstract: A rotary compressor includes a rotor rotatably disposed to be eccentric to an inner peripheral surface of a housing, a rotation shaft for transmitting rotation force of an engine to the rotor, and a connection member through which the rotation shaft is connected to the rotor so that the rotation force is transmitted from the rotation shaft to the rotor. When a rotation speed of the rotation shaft is lower than a predetermined valve, the connection member is connected to the rotation shaft so that the rotation force of the rotation shaft is transmitted to the rotor. On the other hand, when the rotation speed of the rotation shaft is equal to or higher than the predetermined value, the rotation force from the rotation shaft to the rotor is interrupted, so that the rotary compressor is stopped. Therefore, useless load applied to the engine can be restricted.

Abstract: A vehicle AC generator includes a rotor, a stator having a stator core and a stator winding, a pair of front and rear frames and electric components including a rectifier unit and other electrical parts disposed rear of the rear frame. The stator winding is connected to the rectifier unit by one of means of welding, soldering and clamping, and the rear frame has a stay having a fixing surface disposed rear of the electric components. Therefore, it is not necessary to provide a space for screwing a screw bolt to connect the stator winding and the rectifier unit. Because cooling air is discharged from a discharge window along the stay, heated air will not return to any of air intake window.

Abstract: A pulley unit capable of ensuring long-term operational stability in use as a one-way clutch is provided. A one-way clutch is disposed between a pulley and its concentric shaft. The one-way clutch exhibits a U-shaped inner ring that is integral with the pulley, a U-shaped outer ring integral with the shaft, and rollers accommodated within wedge-like spaces formed between the inner ring and the outer ring. A load from a belt is exerted not on the one-way clutch but mainly on a bearing disposed radially inside of the one-way clutch.

Abstract: A vehicle alternator has an armature coil, a rectifier, and a terminal connector. The armature coil has a substantial rectangular cross-section. The rectifier rectifies a voltage induced at the armature coil. The terminal connector includes a crimping portion and a connecting portion. The crimping portion is crimped onto a lead of the armature coil. The connecting portion is fixed to an input terminal of the rectifier with a screw. The crimping portion of the terminal connector is crimped onto the lead so that two opposed surfaces of the lead have surface contact with the terminal connector.

Abstract: A brush-less rotary electric machine is comprised of a frame having a first and second walls, a stator core fixed to the frame, an armature coil formed of conductor segments, a stationary yoke, a rotary yoke disposed opposite the stationary yoke, first claw pole members disposed opposite the stator core, second claw pole members disposed opposite the stationary yoke, and a field coil fixed to the stationary yoke. The armature coil has radial air passages formed among connection portions of the conductor segments, and the second claw pole members have a fan-shaped projection portion. When the claw pole members rotate, the projection portion supplies cooling air to the radial air passages to cool the second coil end.

Abstract: A brushless-type alternator has a rotor, which comprises a pair of pole cores. The pole cores include a plurality of nail parts, respectively. The nail parts are arranged alternately in a rotating direction of the rotor. The nail parts are coupled to-each other with a non-magnetic ring. A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring. The permanent magnets are located radially inside or outside the non-magnetic ring.

Abstract: A vehicle AC generator includes a rotor, a stator having a stator core and a stator winding, a pair of front and rear frames and electric components including a rectifier unit and other electrical parts disposed rear of the rear frame. The stator winding is connected to the rectifier unit by one of means of welding, soldering and clamping, and the rear frame has a stay having a fixing surface disposed rear of the electric components. Therefore, it is not necessary to provide a space for screwing a screw bolt to connect the stator winding and the rectifier unit. Because cooling air is discharged from a discharge window along the stay, heated air will not return to any of air intake window.

Abstract: A pulley unit capable of ensuring long-term operational stability in use as a one-way clutch is provided. A one-way clutch is disposed between a pulley and its concentric shaft. The one-way clutch exhibits a U-shaped inner ring that is integral with the pulley, a U-shaped outer ring integral with the shaft, and rollers accommodated within wedge-like spaces formed between the inner ring and the outer ring. A load from a belt is exerted not on the one-way clutch but mainly on a bearing disposed radially inside of the one-way clutch.

Abstract: A brush-less rotary electric machine is comprised of a frame having a first and second walls, a stator core fixed to the frame, an armature coil formed of conductor segments, a stationary yoke, a rotary yoke disposed opposite the stationary yoke, first claw pole members disposed opposite the stator core, second claw pole members disposed opposite the stationary yoke, and a field coil fixed to the stationary yoke. The armature coil has radial air passages formed among connection portions of the conductor segments, and the second claw pole members have a fan-shaped projection portion. When the claw pole members rotate, the projection portion supplies cooling air to the radial air passages to cool the second coil end.

Abstract: A vacuum pump is attached to a front side of an alternator, that is, between a driven pulley and the alternator, wherein a pump shaft is detachably coupled to an alternator shaft through a tubular bushing shaft. A seal member is disposed in the tubular bushing shaft for preventing leakage of lubricating oil from the pump to brushes arranged at a rear side of the alternator.