Connection arrangement for armature conductors with commutator segments,

Abstract

To retain end portions (10,11) of armature conductors in slots (6, 37) formed in radially projecting lugs (5) of armature segments (2) of a commutator (1), the side walls of the slots are formed with a deviation from a plane surface, for example by a recess (7) or an inwardly extending projection (38), and the end portions (10, 11) of the windings are then placed in the slot and deformed under punch or stamping pressure to form, together with the recess or the region adjacent the projection, an interfitting projection-and-recess connection which will withstand high centrifugal forces, and prevent loosening of the connection under conditions of shock, vibration, high temperatures and temperature changes, to make the connection particularly suitable for installation in mobile, typically automotive dynamo electric machines. The apparatus to make the connection includes a punch press which can either sequentially or simultaneously place one or two end portions (10, 11) of conductors into the slots (6, 37) of the lugs. For further clamping, the edges of the lugs adjacent the walls of the slots can be deformed, for example by shearing, to overlap the uppermost end portion (11) of the conductors.