Abstract: A motor unit for operating a functional member of a vehicle includes a motor portion and a gearing portion. The gear portion includes a wheel gear intermeshed with a worm gear driven by a shaft. The shaft is supported by a plurality of mounts. At least one of the mounts and the shaft defines a complementary contacting surface having a bowed cross section. The bowed cross section minimizes any misalignment problems of the shaft and reduces deformation of the shaft when torque is blocked.

Abstract: A device for measuring torques, especially for reduction gearing for activating a functional member of a motor vehicle, of the type including an electric motor (1) with permanent magnets, the output shaft (2) of which is connected to a worm (3) associated with a wheel (4), itself connected through means forming an elastically deformable damper (5) to an output member (6) of the reduction gearing, is characterized in that it includes means (9, 10) for determining angular displacements of the wheel and of the output member, these means being connected to means (8) for determining the resistive torques applied to this output member on the basis of the relative angular displacement between the wheel and the member.