Device Features SWITCHING rotating clockwise and counter-clockwise for power

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to machine building. Proposed device comprises brush part and structural part to be secured on tool vase, and pair of fixed contacts to be connected to motor winding. Said brush part makes motor brush holder to revolve about structural part. Said brush part has pair of moving contacts arranged between fixed contacts to change conditions of contact between said fixed and moving contacts by rotation. End of any said contact represents an elastic end to be deformed in contact with another contact. Structural or brush part has a regulative part adjoining to elastic part for regulation the degree of deformation thereof.;EFFECT: longer life.;12 cl, 8 dwg