| 摘要 |
PURPOSE:To form a transmission case in a small size, by providing each speed changer, comprising a running-system gear group, creep gear group and a subchange gear group or the like, in a series condition. CONSTITUTION:The first speed changer gear group, rotatably mounted by a bearing in a front transmission case 1, is only a group of running-system change gear in narrow width. A group of very low-speed creep gear 16 and subspeed change gear 17, using gears in large thickness, and a group of differential gears 12 are all rotatably mounted by a bearing in a rear transmission case 10 neighboring to the front transmission case 1. Accordingly, the transmission case as a whole can be formed in a small size by providing the group of a running-system change gear 7 in a thin width to be collected in the front transmission case 1.
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