Caixa de câmbios de variação contínua

The invention relates to a continuously variation gearbox formed by a casing (1) containing opposing input (2) and output (3) shafts, so that the gearbox can operate in both directions, such that the input shaft (2) is associated with a double constant velocity joint (4) provided with a sliding axle (5) which transmits movement to a head (6) positioned facing a disc (7) that rotates about the output shaft (3). The head (6) can move radially on the surface of the disc (7) with the aid of a carriage (8) and said head contains a plurality of equiangularly distributed pressure columns provided with driving bolts that emerge selectively under the action of a series of wheels mounted on a fork which tilts and comes into contact with one of said pressure columns, thereby causing the aforementioned driving bolt to emerge and generating the movement of the disc (7).