Carbon brush holder

Disclosed in the utility model is a carbon brush holder. According to key points of the employed technical scheme, the carbon brush holder comprises carbon brushes, two carbon brush boxes and a carbon brush seat. The carbon brushes are respectively arranged in the carbon brush boxes; an ear is respectively arranged at one side, approaching the carbon brush seat, of each carbon brush box; and the ears and the carbon brush seat are in a rotating connection mode. The carbon brush holder is characterized in that a drive unit enabling the tail portions of the two carbon brush boxes to be close to each other is arranged at the carbon brush seat. In addition, a control circuit for controlling the drive unit is also arranged at the carbon brush seat and consists of a detection unit, a control unit, and an alarm unit. With the provided carbon brush holder, the carbon brush temperatures inside the carbon brush boxes can be prevented from being too high.