Patent ID: 6864615

Claim:
Electric machine including a collector ( 60 ) integral with an armature shaft ( 62 ), a brush-holder assembly comprising an end cap ( 26 ) forming a bearing intended to be mounted on a carcass of the machine and a set of members ( 28 , 30 , 32 , 34 ) for electrical connection of the brushes mounted on the end cap ( 26 ), in which some of the members for electrical connection of the said brushes are composed of guide cages ( 36 , 38 , 40 , 42 ) suitable for accommodating a respective brush ( 44 ); the said guide cages being provided internally with elastic means ( 45 ) pushing the brushes, in operation, radially into abutment against the collector ( 60 ) of the electric machine, and in which a limiting member ( 64 ), forming an abutment for limiting the radial displacement of the brushes in the absence of a collector is provided, wherein the dimensions of the limiting member ( 64 ) are suitable for obtaining a tight fit of this member on the end cap ( 26 ), wherein the collector ( 60 ) of the machine features, at its inner periphery, an axially projecting collar ( 163 ) having a free end for contact with the inner periphery of the limiting member ( 64 ), and wherein the free end of the collar is profiled for local contact with the limiting member ( 64 ).