Patent ID: 8042419
Filing Date: 2011-10-25
Classification: F16H,Y10T

Abstract:
1. A vehicle transmission comprising: a plurality of gear trains and a reverse gear train with a plurality of gear stages which can selectively be established; a shift drum provided on an outer circumference thereof with multiple circumferentially extending lead grooves; drive means for rotatably driving the shift drum; shift forks having shift pins slidably engaged with the multiple lead grooves and which switch the established states of the gear trains with the plurality of gear stages according to an operation resulting from turning of the shift drum; wherein a particular one of the multiple lead grooves on the outer circumference of the shift drum continuously extends beyond one circle of the shift drum, the particular one of the multiple lead grooves having first and second ends that are arranged so as to be out of alignment with each other in an axial direction of the shift drum, and wherein a common shift position adapted to establish the gear trains with two shift stages different from each other is set at one position corresponding to the first and second ends of the particular one lead groove along the circumferential direction of the shift drum.