Patent ID: 6540636
Filing Date: 2003-04-01
Classification: B60K,Y02T,Y10S

Abstract:
A power transmission mechanism for a front and rear-wheel drive vehicle in which one of pairs of front and rear drive wheels is driven by an engine whereas the other pair is driven by an electric motor, for transmitting the power from said electric motor to said the other pair of drive wheels, said power transmission mechanism comprising:an output shaft adapted to rotate together with said electric motor; a rotatable middle shaft which is parallel with said output shaft; a drive shaft which is parallel with said output shaft and is adapted to rotate together with said the other pair of drive wheels; a middle shaft speed reduction mechanism having an output shaft speed reduction member provided on said output shaft and a first middle shaft speed reduction member provided on said middle shaft and adapted to reduce the speed of said middle shaft relative to said output shaft through coupling of said output shaft speed reduction member and said first middle shaft speed reduction member; a drive shaft speed reduction mechanism having a second middle shaft speed reduction member provided on said middle shaft and a drive shaft speed reduction member provided on said drive shaft and adapted to reduce the speed of said drive shaft relative to said middle shaft through coupling of said second middle shaft speed reduction member and said drive shaft speed reduction member; and a differential coupling said drive shaft speed reduction member and said drive shaft.