Voltage stabilizer motor gear box capable of rapidly installing transmission gear set

The utility model discloses a voltage stabilizer motor gear box capable of quickly installing a transmission gear set, which comprises a gear box I and a gear box II, two plug-in units are fixedly arranged on one side of the inner cavity of the gear box I and one side of the inner cavity of the gear box II, and the surfaces of the two plug-in units are sleeved with a gear installation frame. A transmission gear set is movably installed on the surface of the gear installation frame, a sliding groove is formed in one side of the inserting piece, and a sliding rail is fixedly connected to one side of an inner cavity of the sliding groove. According to the transmission gear mounting tool, the transmission gear can be mounted in the gear box and then directly placed in the gear box to be fixed, so that the mounting work of the gear is not limited by the internal space of the gear box, a user can quickly finish the mounting work of the transmission gear without redundant operation, time and labor are saved, efficie