Transmission of electronic cars

PURPOSE: A transmission of an electric car is provided to increase driving force by producing a speed-reduction structure of 2-step using a slave rotating shaft part. CONSTITUTION: A driving shaft(11) is driven by a motor. A clutch disk(30) is inserted and fixed in the center of the driving shaft. A first clutch ball and a second clutch ball are respectively fixed to both sides of the clutch disk so that a part is projected. The diameter of a first driving gear is different with the diameter of a second driving gear. A first slave rotating shaft part(60) and a second slave rotating shaft part comprise a first slave gear which is meshed with the first driving gear, and a second slave gear which is meshed with the second driving gear.