Patent ID: 6724124
Filing Date: 2004-04-20
Classification: H02K

Abstract:
A rotary electric machine, comprising:a rotation shaft; an armature core supported by the rotation shaft; a plurality of unit coils constructing an armature coil, each of the unit coils including a lower layer coil and an upper layer coil that are mounted on the armature core in double layers, the lower layer coil and the upper layer coil each including a coil end located parallel to an axial end surface of the armature core; brushes being in contact with axial end surfaces of the coil ends of the upper layer coils; and a pressing member for pressing the coil ends toward the armature core, wherein the pressing member includes a cylindrical portion fitted on the rotation shaft, a flange radially extending from the cylindrical portion, and a pressing portion formed on an outer periphery of the flange to be in contact with an insulator interposed between the coil ends and the pressing portion, wherein the pressing portion presses against the coil ends through the insulator by resiliency of the flange and the cylindrical portion is maintained at a predetermined position on the rotation shaft, even when the coil ends axially expand and contract due to thermal deformation of the unit coils, and the pressing member is designed such that a force required to remove the cylindrical portion from the rotation shaft is greater than a force that is applied to the cylindrical portion in a direction separating the cylindrical portion from the armature core by the resiliency of the flange.