Brush holder and supporting rod device mating together

A slip ring assembly of a rotating electrical machine comprising

• at least one conductive ring having a cylindrical surface, and
• a brush assembly for supporting at least one brush electrically contacting the cylindrical surface of the at least one conductive ring, one of the brush assembly or the at least one conductive ring having a rotational movement around a first axis extending along a longitudinal direction, the brush assembly comprising:
• at least one brush holder, said brush holder defining at least one cage into which the at least one brush may be slidably received, said at least one brush holder comprising a spring element (104) arranged and installed so as to apply a force onto the at least one brush when said at least one brush is received in the at least one cage so as to push said at least one brush against the cylindrical surface of the conductive ring, said force having a component that is parallel to a radial direction with regard to the first axis;
• and
• at least one rod device for supporting the brush holder,
• wherein the at least one rod device comprises an elongated member extending along a second axis that is parallel to the first axis, and comprises at least a part that is made of insulating material,
• wherein one of the at least one rod device and the at least one brush holder defines at least one recess,
• wherein an other one of the at least one brush holder and the at least one rod device comprises a mating portion that is sized to be received into the recess,
• wherein said recess is defined by a first wall disposed for abutment against the mating portion when, said mating portion being received in said recess, the brush holder is driven along said rod device in a longitudinal direction parallel to the second axis,
• wherein said recess is defined by a second wall disposed for abutment against mating portion when, said mating portion being received in said recess, the brush holder is driven in a tangential direction around the second axis.