Patent ID: 7395728

Claim:
A multi-geared power shift transmission for a construction machine providing improved installation flexibility, the transmission comprising: a torque converter ( 2 ); a drive shaft ( 3 ) being drivingly coupled to the torque converter ( 2 ); a first counter shaft ( 5 ); a second counter shaft ( 6 ); a third counter shaft ( 7 ); a fourth counter shaft ( 17 ); and an output shaft ( 4 ) for supplying driving power; and each of the drive shaft ( 3 ), the output shaft ( 4 ), the first counter shaft ( 5 ), the second counter shaft ( 6 ), the third counter shaft ( 7 ) and the fourth counter shaft ( 17 ) having a gear unit comprising at least one fixed gear wheel, an idler gear wheel and a shift clutch ( 8 , 9 , 10 , 11 , 12 , 13 ) for coupling the idler gear wheel to the respective shaft such that up to six forward gear ratios and three reverse gear ratios can be engaged; the gear unit of the drive shaft ( 3 ) is only directly drivingly engagable with the gear unit of the first counter shaft ( 5 ) and the gear unit of the fourth counter shaft ( 17 ); the gear unit of the first counter shaft ( 5 ) is only directly drivingly engagable with the gear unit of the drive shaft ( 3 ), the gear unit of the fourth counter shaft ( 17 ) and the gear unit of the second counter shaft ( 6 ); the gear unit of the second counter shaft ( 6 ) is only directly drivingly engagable with the gear unit of the first counter shaft ( 5 ) and the gear unit of the output shaft ( 4 ); the gear unit of the third counter shaft ( 7 ) is only directly drivingly engagable with the gear unit of the output shaft ( 4 ); the gear unit of the fourth counter shaft ( 17 ) is only directly drivingly engagable with the gear unit of the drive shaft ( 3 ) and the gear unit of the first counter shaft ( 5 ); and the gear unit of the output shaft ( 4 ) is directly drivingly engagable with at least the gear unit of the second counter shaft ( 6 ) and the gear unit of the third counter shaft ( 7 ); whereby that the transmission provides improved installation flexibility.