Patent ID: 7562598

Claim:
Seven-gear gearbox for a motorcar double clutch transmission, comprising: a gear case; a first inner input shaft ( 10 ) and a second outer input shaft ( 12 ) arranged coaxial to the first, said first and second input shafts ( 10 , 12 ) being supported on the gear case ( 52 ); first and second output shafts ( 14 , 16 ); a first group of driving gearwheels ( 21 , 23 , 27 ) carried by the first input shaft ( 10 ) so as to-be drivingly connected for rotation therewith, said first group of driving gearwheels being associated to a first gear (I), to a third gear (III), to a fifth gear (V) and to a seventh gear (VII); a second group of driving gearwheels ( 22 , 24 ) carried by the second input shaft ( 12 ) so as to be drivingly connected for rotation therewith, said second group of driving gearwheels being associated to a second gear (II), to a fourth gear (IV), to a sixth gear (VI) and to a reverse gear (R); a first group of driven gearwheels ( 32 , 35 , 36 , 37 ) idly mounted on the first output shaft ( 14 ); a second group of driven gearwheels ( 31 , 33 , 34 , 38 ) idly mounted on the second output shaft ( 16 ); and a first end support ( 54 ), a second end support ( 56 ) and a third intermediate support ( 58 , 60 ) arranged to support the first and second input shafts ( 10 , 12 ) on the gear case ( 52 ), wherein the first end support comprises a bearing ( 54 ) fitted between the gear case ( 52 ) and an end portion of the first input shaft ( 10 ) opposite a first side of the gearbox, wherein the second end support comprises a bearing ( 56 ) fitted between the gear case ( 52 ) and a portion of the second input shaft ( 12 ) facing the first side of the gearbox, and wherein the third intermediate support comprises a first bearing ( 58 ) radially interposed between the first and second input shafts ( 10 , 12 ) and a second bearing ( 60 ) fitted between the second input shaft ( 12 ) and the gear case ( 52 ) so as to be axially aligned or superimposed with the first bearing ( 58 ).