| 摘要 |
A shift drum 95 is provided on the outer circumference with at least one particular lead groove 97 among lead grooves 96, 97, 98 which continuously extends beyond one circle of the shift drum 95 and with both ends of the second lead groove 97 which are arranged so as to be out of alignment with each other in the axial direction of the shift drum 95. A common shift position adapted to establish gear trains with two shift stages different from each other is set at one position corresponding to both the ends of the particular lead groove 97 along the circumferential direction of the shift drum 95. In a vehicle transmission, to prevent an increase in the diameter of the shift drum 95 and to eliminate the significant change of the shape of a lead groove 96, 97, 98 even if the number of shift positions set on the shift drum 95 is increased. |
