JPS56129568A - Assembling of coreless armature - Google Patents

Abstract

PURPOSE:To prevent the layer-short between covered conductors and splitting of commutator disk plate, etc., of the coreless armature by a method wherein protruding step parts having the same outside diameter with the inside diameter of coil and having plural concave stripes at the outer circumferential face are provided at the tip face of a disk type forming mold to compress the end face part on the commutator side of coil of the coreless armature. CONSTITUTION:The disk type protruding step parts 10a having the same outside diameter with the inside diameter of the coil 3 are provided at the tip face of the disk type forming mold 10 to compress the end face part 3'' on the commutator side of the coil 3, plural concave stripes 17 parallel with the shaft 7 are formed at the outer circumferential face of the disk type protruding step parts 10a and tap parts 14 formed by intertwisting the covered conductors being the coating stripped off are made to protrude in the concave stripes 17. Then the coil 3 is molded with pressure, and the covered conductors are made to protrude at the inside face and outside face of the circumferential part of a commutator disk plate 4. Accordingly the fear of generation of cracking of the commutator disk plate and of layer-short between the covered conductors are eliminated.