| 摘要 |
<p>To provide a twin clutch transmission (1) capable of reducing the frequency of hit noise occurring in a dog clutch when shifting from neutral to first speed. In a twin clutch transmission (1) composed of a transmission TM having a plurality of pairs of gears according to the number of speed stages between dual-structured main shafts (6, 7) and a countershaft (9), and a twin clutch (TCL) disposed on the main shafts (6, 7), by which rotation drive force of an engine is transferred or blocked, wherein the transmission TM performs a transmission between adjacent speed change gears on each shaft by means of a dog clutch, and comprises a shift drum (30) for switching between engagement condition of the dog clutch by driving a shift fork (71, 72, 81, 82). The patterns of guide grooves (SC1 and SC2) in the shift drum (30) are so formed that the dog clutches for a first speed gear and a second speed gear engage simultaneously when the shift drum (30) is rotated by predetermined angles to shift from neutral to first speed.</p> |
