| 摘要 |
Within a vehicle transmission casing (11), a plurality of speed-reducing and -changing gear trains are disposed between a drive shaft (12), which extends laterally of the transmission casing, and a differential gearing (13) for driving left and right wheel axles (15) differentially. The gear trains are composed of plural gears (17, 18; 117, 118, 119), which are fixedly mounted on the drive shaft, and another plural gears (20, 21; 120, 121, 122) which are rotatably mounted on a differential casing (14) of the gearing and mesh respectively with the gears on the drive shaft. A clutch member (23; 123) is disposed on the differential casing for coupling the gears thereon one at a time to this casing. The gears on the differential casing are preferably mounted on this casing through sleeve members (24a, 25b) which may be integral with a collar member (24) for supporting the clutch member slidably but non-rotatably relative to the differential casing. A compactness of the transmission assembly is attained while securing large speed-reducing ratios at the gear trains.
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