BRUSH HOLDER FOR ELECTRICAL CONTACT BRUSHES

The present inventive concept relates to a brush holder for electrical machines comprising a clamping piece comprising a first mounting part and a second clamping part, which when assembled define a clamping hole, which is adapted to be assembled around a spindle; and two brush holder arms, wherein a proximal end of said arm is pivotally mounted on the first mounting part of said clamping piece, and wherein a distal end of said arm is adapted to receive and retain a brush, and wherein said arms have an upper side which is opposite to a lower side facing a slip ring; at least one biasing spring which spring is adapted to act upon said brush holder arms in such a way that said brush holder arms move pivotally towards a slip ring, and when in use presses said brushes against the slip ring; at least one conductive wire connecting the brush to the clamping piece; and wherein a brush holder arm locking mechanism is arranged at or along the upper side of each respective brush holder arm, that said locking mechanism is adapted to be inserted into a slot arranged in the second clamping part; and wherein a brush locking pin is arranged to retain the brush in said brush holder arm, which pin when in use is provided in corresponding bores arranged in the brush holder arm and the brush, wherein said brush locking pin comprises a pipe portion and a spring portion, wherein said spring portion is arranged inside the pipe and has a portion protruding on the outside of said pipe portion from a slot in a wall of said pipe; and wherein said mounting part of said clamping piece is provided with a brush arm stop, arranged to limit a pivot movement of the brush holder arm in a direction towards a slip ring.