MOTOR ARMATURE AND MANUFACTURE THEREOF

PURPOSE:To prevent the bending of the shaft of an armature and the generation of the uneven distribution of a winding by injecting and forming an insulating sealing member in the direction parallel with the axial direction of the armature from the reverse-side end face of a commutator-attached section in a sealing section. CONSTITUTION:An insulating sealing section 8 cylindrically formed while covering the opening sections of slots 4 and the outer circumferences of windings 6 is installed mainly. A glass fiber-filled polyacetal resin is used as an insulating sealing member in the sealing section 8, and shaped in a cylindrical form having the same diameter as a core 3. Consequently, the outer circumferences of the windings 6 in the slots 4 are filled with the sealing member, and the surfaces of the opening sections of the slots 4 are shaped in the same diameter as the outer circumference of the core 3. Winding end sections 6a are filled and covered with the sealing member, and formed in a smooth cylindrical shape. Accordingly, the bending of a shaft and the generation of the uneven distribution of the windings can be prevented by molding the sealing section 8.