Patent ID: 6234931
Filing Date: 2001-05-22
Classification: F16H

Abstract:
A driving force apparatus comprising:a rotatable shaft supported by a first bearing near one end portion and supported by a second bearing near another end portion;a first clutch plate fixed to said shaft and rotating together with said shaft;rotational force input means mounted to one end portion of said shaft;rotational force output means provided in another end portion of said shaft so as to be coaxial with said shaft and freely rotate with respect to said shaft;a second clutch plate provided on said shaft for rotating with respect to said shaft and moving longitudinally along said shaft;a third clutch plate connected to said second clutch plate, for rotating with respect to said shaft, and engaged with said rotational force output means; andelectromagnetic means for moving said second clutch plate longitudinally along said shaft so as to engage with said first clutch plate;speed change means for engaging with said second clutch plate in a case that said second clutch plate is disengaged from said first clutch plate and fixed to said shaft,wherein said first clutch plate, said second clutch plate, said third clutch plate, said electromagnetic means and said speed change means are all arranged on said shaft between said first bearing and said second bearing.