Automobile
AssigneeHitachi, Ltd.
InventorsKazuhiko Satou, Toshimichi Minowa, Satoru Kuragaki, Tokuji Yoshikawa, Tatsuya Ochi
Life of this patent
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Abstract
An automobile which is designed to be able to drive wheel tires by making use of a double series differential gear device 15 provided with both a first series gear constituted by a first ring gear 22A and a first drive gear 23A and a second series gear constituted by a second ring gear 22B and a second drive gear 23B, thereby, a back-up for an abnormal situation can be prepared and a high reliability is maintained, accordingly, with the use of highly reliable differential gear mechanism, an automobile in which a stable braking force is always obtained without being affected by its environmental conditions is provided.
Claims5
An automobile of a type in which a differential gear mechanism including at least a ring gear and a drive gear for revolution drive in a planetary gear is used and a drive power source and a plurality of wheel tires are torque-coupled via a common rotatable shaft, characterized in that
- the ring gear and the drive gear for revolution drive in the planetary gear are constituted by two series of gear mechanisms of first and second gear mechanisms having a same reduction gear ratio but having different diameters each other;
- and,
- an engagement play clearance between the ring gear and the drive gear in one of the two series of gear mechanism is differentiated from an engagement play clearance between the ring gear and the drive gear in the other of the two series of gear mechanism.
Dependencies are inferred from the claim text.