To achieve reduction in size and cost by simplifying a structure of a meshing switching mechanism for preventing torque drop of an AMT (Automatic Manual Transmission).
A first meshing switching mechanism DS23 performs switching among a first state of coupling shafts A14B and B14A together in a neutral state of a sleeve 55, a second state of separating the shafts A14B and B14A from each other and coupling a speed change gear B33 of the shaft B14A to the shaft A14B via convexoconcave engagement portions 55c and 58, and a third state of separating the shafts A14B and B14A from each other and coupling a speed change gear A32 of the shaft A14B to the shaft B14A via a synchronization mechanism. Since coupling relationships among the shaft A14B, the shaft B14A, the speed change gear A32 and the speed change gear B33 can be switched to a state among the first-third states by the single first meshing switching mechanism DS23, reduction in size and cost can be achieved by simplifying a structure of the meshing switching mechanism DS23.
Kazuaki Niki
Nude Shima Shinji