Differential Gear

Differential gear, in auto mechanics, gear arrangement that permits power from the engine to be transmitted to a pair of traveling wheels, dividing the force equally Differential Gear between them but permitting them to follow paths of different lengths, as when turning a corner or traversing an uneven street. On a straight road the tires rotate at the same acceleration; when turning a part the outside wheel offers farther to move and can turn faster than the inner steering wheel if unrestrained.

The elements of the Ever-Power differential are shown in the Figure. The power from the transmission is sent to the bevel ring gear by the drive-shaft pinion, both which are kept in bearings in the rear-axle housing. The case can be an open boxlike framework that is bolted to the band gear and contains bearings to support a couple of pairs of diametrically opposite differential bevel pinions. Each wheel axle is attached to a differential side gear, which meshes with the differential pinions. On a straight road the wheels and the side gears rotate at the same swiftness, there is no relative motion between your differential aspect gears and pinions, plus they all rotate as a device with the case and ring gear. If the vehicle turns left, the right-hand steering wheel will be required to rotate faster than the left-hand steering wheel, and the medial side gears and the pinions will rotate in accordance with one another. The ring equipment rotates at a quickness that is equal to the mean quickness of the remaining and right wheels. If the wheels are jacked up with the tranny in neutral and one of the wheels is turned, the opposite wheel will turn in the opposite path at the same velocity.

The torque (turning minute) transmitted to both wheels with the Ever-Power differential may be the same. Consequently, if one steering wheel slips, as in ice or mud, the torque to the other wheel is reduced. This disadvantage can be overcome relatively by the use of a limited-slip differential. In one edition a clutch connects one of the axles and the ring gear. When one steering wheel encounters low traction, its inclination to spin can be resisted by the clutch, hence providing greater torque for the additional wheel.
A differential in its most elementary form comprises two halves of an axle with a gear on each end, linked together by a third equipment creating three sides of a square. This is normally supplemented by a 4th gear for added power, completing the square.


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