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In-line drivetrain and four wheel drive work machine using same

United States Patent

August 5, 2008
View the Complete Patent at the US Patent & Trademark Office
A four wheel drive articulated mine loader is powered by a fuel cell and propelled by a single electric motor. The drivetrain has the first axle, second axle, and motor arranged in series on the work machine chassis. Torque is carried from the electric motor to the back differential via a pinion meshed with the ring gear of the back differential. A second pinion oriented in an opposite direction away from the ring gear is coupled to a drive shaft to transfer torque from the ring gear to the differential of the front axle. Thus, the ring gear of the back differential acts both to receive torque from the motor and to transfer torque to the forward axle. The in-line drive configuration includes a single electric motor and a single reduction gear to power the four wheel drive mine loader.
Hoff; Brian (East Peoria, IL)
Caterpillar Inc. (Peoria, IL)
11/ 258,961
October 26, 2005
STATEMENT OF GOVERNMENT RIGHTS This invention was made with U.S. Government support under Contract No. DE-FC36-01G011095, awarded by the U.S. Department of Energy. The U.S. Government has certain rights in this invention.