Detachable portable transmission device fast in heat dissipation

The utility model discloses a quick heat dissipation and detachable portable transmission device which comprises a mounting plate, a bearing groove is formed in the inner side of the mounting plate, a transmission bearing is mounted on the inner side of the bearing groove, a transmission shaft is embedded in the inner side of the transmission bearing, a driving gear is connected to the outer side of the transmission shaft in a clamped mode, and the driving gear is connected to the outer side of the transmission shaft in a clamped mode. A dustproof box is mounted on the end face of one side of the mounting plate, a filter screen is embedded into the inner side of a filter groove plate mounted at the bottom end of the dustproof box, a fan base is mounted at the top end of the dustproof box, a cooling fan is mounted on the inner side of the fan base, and a driving motor is mounted on the end face of one side of the mounting plate. The cooling fan on the inner side of the fan seat is turned on to rotate, so that