Brush holder and supporting rod device mating together

A brush assembly (100) for a slip ring assembly of a rotating electrical machine, for supporting at least one brush (103) electrically contacting a cylindrical surface (202) of a conductive ring (201) of the slip ring assembly, one of the brush assembly and the conductive ring having a rotational movement around a first axis (D1) extending along a longitudinal direction, the brush assembly comprising:

• at least one brush holder (120), said brush holder defining at least one cage into which at least one brush (103) may be slidably received, said brush holder comprising a spring element (104) arranged and installed so as to apply a force onto the brush when said brush is received in the cage so as to push said brush against the cylindrical surface of the conductive ring, said force having a component that is parallel to a radial direction with regards to the first axis;
• at least one rod device (101) comprising at least a part that is made of insulating material, and extending along a second axis (D2) the direction of which having a component that is parallel to the first axis, for supporting the brush holder,
• wherein
• one of the rod device and the brush holder defines at least one recess (121),
• the other one of the brush holder and the rod device comprises a portion that is sized to be received into the recess, said mating portion (105),
• said recess is defined by a first wall (123, 124) 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,
• said recess is defined by a second wall (122) 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.