Differential Gear

Differential gear, in automotive mechanics, gear arrangement that permits power from the engine to be transmitted to a pair of traveling wheels, dividing the force equally between them but permitting them to check out paths of different lengths, as when turning a corner or traversing an uneven street. On a straight road the wheels rotate at the same speed; when turning a part the outside wheel has farther to go and will turn faster compared to the inner wheel if unrestrained.

The elements of the Ever-Power differential are demonstrated in the Figure. The energy from the transmission is delivered to the bevel ring gear by the drive-shaft pinion, both of which are held in bearings in the rear-axle casing. The case can be an open boxlike structure that is bolted to the band gear possesses bearings to support one or two pairs of diametrically reverse differential bevel pinions. Each steering wheel axle is attached to a differential side gear, which meshes with the differential pinions. On a straight road the wheels and the medial side gears rotate at the same speed, there is no relative motion between the differential part gears and pinions, and they all rotate as a device with the case and ring gear. If the automobile turns left, the right-hand wheel will be forced to rotate faster compared to the left-hand steering wheel, and the medial side gears and the pinions will rotate in accordance with each other. The ring equipment rotates at a acceleration that is equal to the mean acceleration of the left and right wheels. If the wheels are jacked up with the transmitting in neutral and among the tires is turned, the contrary wheel will turn in the opposite direction at the same velocity.

The torque (turning minute) transmitted to the two wheels with the Ever-Power differential may be the same. Therefore, if one wheel slips, as in ice or mud, the torque to the other wheel is decreased. This disadvantage could be overcome relatively by the use of a limited-slide differential. In one version a clutch connects among the axles and the band gear. When one steering wheel encounters low traction, its coupling China inclination to spin can be resisted by the clutch, hence providing greater torque for the various other wheel.
A differential in its most elementary form comprises two halves of an axle with a equipment on each end, connected together by a third equipment creating three sides of a square. This is generally supplemented by a fourth gear for added power, completing the square.


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