Three-clutch automatic transmission

The utility model discloses a three clutch automatic transmission, reduction gear, input device, clutch control mechanism and speed change gear, reduction gear includes: first power input shaft, second power input shaft, third power input shaft, power output shaft, reverse gear idle gear shaft, input device includes: second clutch, third clutch, clutch control mechanism, reverse gear idle gear shaft, reverse gear idle gear gear shaft, reverse gear idle gear gear shaft. A total power input shaft, a total power input gear, a first clutch and a clutch shell gear; the clutch control mechanism comprises a first spiral pressing device, a second spiral pressing device, a third spiral pressing device, a first main clutch pull rod, a second main clutch pull rod, a third main clutch pull rod, a gear shifting gear, a gear shifting ring and a gear shifting ring action receiving sleeve. The speed change device comprises a shifting fork cam, a shifting fork, a shifting fork guide rail and rolling steel balls, wherein the s