Brush holder assembly capable of easily separating positive and negative electrodes

The utility model provides a brush holder assembly easy to separate positive and negative electrodes, which comprises a brush holder plate, a plurality of mounting screw holes are arranged on the brush holder plate, a group of symmetrical carbon brush boxes are arranged on the brush holder plate, each carbon brush box comprises a box body, a spring column and a binding post, the spring column and the binding post are transversely arranged on two sides of the box body respectively, U-shaped grooves are arranged on three surfaces of the box body, carbon rods are accommodated in the U-shaped grooves, and a torsion spring is sleeved on the spring column. The inner side end of the torsion spring is fixed on the spring column, the outer side end of the torsion spring penetrates through the U-shaped groove to abut against the bottom end of the carbon rod and exerts radial elastic force on the carbon rod, the binding post is connected with a terminal of the connecting wire, the positive electrode binding post is a ma