Carbon brush device of propeller

The invention provides a carbon brush device of a propeller, and relates to the technical field of variable-pitch propeller carbon brushes. A mounting lug is arranged at one end of the brush holder shell, and the mounting lug is connected with the bracket; a sensor mounting hole and a sliding groove are formed in the brush holder, a proximity sensor and a carbon block are arranged in the sensor mounting hole and the sliding groove respectively, the proximity sensor is fixed in the sensor mounting hole, a first cable of the proximity sensor extends towards the outside of the brush holder, the carbon block is arranged in the sliding groove in a sliding mode, and an elastic component is arranged at the rear end of the carbon block. The elastic component is used for applying elastic force to the carbon block to enable the front end of the carbon block to extend out of the brush holder, and a second cable at the tail of the carbon block extends to the outside of the brush holder; the problems that in the prior art