Patent ID: 7426880
Filing Date: 2008-09-23
Classification: F16H,Y10T

Abstract:
1. A five or more speed gearbox for a double clutch transmission of a motor vehicle, comprising: a first, inner input shaft; a second, outer input shaft disposed coaxially with the first input shaft; first and second output shafts disposed parallel to the first and second input shafts; a first set of driving gear wheels associated with odd gears and with a reverse gear and carried by the first input shaft in such a way as to rotate fixedly with it; a second set of driving gear wheels associated with even gears and carried by the second input shaft in such a way as to rotate fixedly with it; a first set of driven gear wheels mounted freely rotatably on the first output shaft and arranged to be driven to rotate each by a corresponding driving gear wheel to form a given gear; a second set of driven gear wheels mounted freely rotatably on the second output shaft and arranged to be driven to rotate each by a corresponding driving gear wheel to form a given gear; wherein the said first set of driving gear wheels includes a first driving gear wheel associated both with a first gear and the reverse gear and a second driving gear wheel associated both with a third gear and with a fifth gear; wherein the said second set of driving gear wheels includes a third driving gear wheel associated with a second gear and a fourth driving gear wheel associated with a fourth gear; wherein the said first set of driven gear wheels includes a first driven gear wheel meshing with the first driving gear wheel to form the first gear and a second driven gear wheel meshing with the second driving gear wheel to form the fifth gear; and wherein the said second set of driven gear wheels includes a third driven gear wheel arranged to be driven to rotate by the first driving gear wheel to form the reverse gear, a fourth driven gear wheel meshing with the second driving gear wheel to form the third gear, a fifth driven gear wheel meshing with the third driving gear wheel to form the second gear and a sixth driven gear wheel meshing with the fourth driving gear wheel to form the fourth gear.