Alternating current generator for use in a vehicle

摘要

An alternating current generator includes a frame, a rotation shaft, a slip ring attached to the rotation shaft, a brush in contact with the slip ring, and a brush holder secured to the frame. The brush holder includes a brush-guiding portion and a cover portion. The brush-guiding portion of the brush holder has a hollow slidably receiving the brush for movement in a radial direction with respect to the rotation shaft. The cover portion of the brush holder encloses that portion of the rotation shaft whee the slip ring is attached so that the slip ring is protected from outside dust and splash. This cover portion is integrally formed with the brush-guiding portion in such a manner that neither a clearance nor a mating surface is produced between the cover portion and the brush-guiding portion.