Patent ID: 6494110
Filing Date: 2002-12-17
Classification: F16H,Y10T

Abstract:
An automatic transmission having four parallel shafts comprising, in parallel,:a main shaft, a counter shaft to which the rotation of the main shaft is directly transmitted via a first route, a first sub-shaft provided on a second route through which the rotation of the main shaft is transmitted to the counter shaft, and a second sub-shaft provided on a third route through which the rotation of the main shaft is transmitted to the counter shaft, wherein a first gear for transmitting the rotation of the main shaft to the counter shaft via the second route and a second gear for transmitting the rotation of the main shaft to the counter shaft via the first route are provided on the main shaft, a third gear and a fourth gear for transmitting the rotation of the main shaft to the counter shaft via the third route are provided on the second sub-shaft, the first gear fixed to the main shaft is meshed with the third gear provided on the second sub-shaft in a manner such that the third gear can be freely engaged and disengaged, and the second gear provided on the main shaft in a manner such that the second gear can be freely engaged and disengaged is meshed with the fourth gear fixed on the second sub-shaft.