| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronization mechanism that can suppress a shift block generated during a shift operation without accompanying the reduction of transmittable drive torque and the lowering of durability.SOLUTION: In a second engagement gear of a synchronization sleeve, first engagement faces engaged which a first engagement part and a fourth engagement part are formed at both sides in a rotation direction, and an end at the side of a clutch gear is arranged at the side of a synchronization hub rather than an end at the side of the clutch gear of a drive force transmission gear. In a synchronization gear of a synchronization ring, a second engagement face engaged which the drive force transmission gear which slide-moves to an axial direction is formed at an end at the side of the clutch gear. In a second ring regulation gear of the synchronization ring, at least at one of both sides in the rotation direction, the end at the side of the synchronization hub is arranged at the side of the synchronization hub rather than the end at the side of the synchronization hub of the second engagement face, and a third engagement face abutting on the first engagement face and regulating a position in the rotation direction of the synchronization ring is formed. |
