| 摘要 |
PURPOSE:To aim at the compactification of an engine auxiliary driving gear by rotating an auxiliary driving output pulley variably in using a cam shaft driving gear fixed to a crankshaft as a driving source, and housing a speed change gear in mesh with this cam shaft driving gear, in a front case. CONSTITUTION:A driving gear 12 concentrically formed with both first and second driving gears 12a, 12b as one body is fixed to an edge of a crankshaft 10, rotating a cam shaft 14 by the rotation via a train of gears 18, 20, 16. These gears 12, 18, 20, 16 or the like are housed in an interspace covered by a front case 22 and a cover 24. An auxiliary driving gear is installed in the cover 24, and a first speed change gear 34 is mesh with the first driving gear 12a is fixed to an input shaft 30 supported in the housing 28 free of rotation. In addition, a cylindrical rotary transmission member 38 with a second speed change gear 36 in mesh with the second driving gear 12b at one end is installed in the circumference of the input shaft 30 free of rotation, and rotation of this member 38 is transmitted to an output pulley 42 via a one-way clutch 50. |
