| 主权项 |
1. A synchronizer comprising:
a hub configured to rotate together with a rotating shaft, and including splines on an outer circumferential surface thereof; a sleeve including, on an inner circumferential surface thereof, internal splines to be slidably engaged with the splines, and configured to move in an axial direction between a neutral position and an operation position by a shift operation; a transmission gear adjacent to the hub, relatively rotatably supported by the rotating shaft, having a friction surface on a side of the hub, and including external splines on an outer circumferential surface thereof; a blocking ring arranged between the hub and the transmission gear, including, on an outer circumferential surface thereof, dog teeth to be slidably engaged with the internal splines, and movable in an axial direction so as to be able to frictionally engage with the friction surface; and a synchronous spring attached on the outer circumferential surface of the blocking ring, when the sleeve is moved in the axial direction from the neutral position to the operation position, the blocking ring being moved in the axial direction and frictionally engaged with the transmission gear, and the internal splines of the sleeve being engaged with the dog teeth of the blocking ring, thereby the rotation of the hub being synchronized with the rotation of the transmission gear, and the internal splines moving to the transmission gear and engaging with the external splines, thereby the rotating force of the hub being transmitted to the transmission gear via the sleeve, wherein the blocking ring comprises: a notch formed in the outer circumferential surface thereof; and a preceding projecting member accommodated in the notch, configured to project toward the external splines, and supported by the synchronous spring, and after the rotation of the hub and the rotation of the transmission gear are synchronized by the movement of the sleeve, the preceding projecting member is pressed by the internal splines, and engaged with the external splines before the internal splines are engaged with the external splines. |
