Introduction To The Differential

　　Like most things on a modern car, the simple gear arrangement known as a differential has undergone constant refinement and experimentation - resulting in a range of types, each with its own advantages and disadvantages.

　　The concept of a differential—that is, allowing wheels mounted on the same axle to rotate independently of each other—is an ancient design, with the first known instance of its use recorded in China in the first millennium BC.

　　While this was long before the invention of the automobile, carts, wagons, and chariots still had the same problem of one wheel slipping or dragging when cornering, increasing wear and damaging the road.

　　The advent of engines that powered either the front or rear wheels to propel the vehicle rather than just being dragged by horses added a new problem to overcome - how to still be able to power both wheels while allowing independent rotation.

　　The earliest cars didn't bother to try, they simply powered one wheel on a separate axle. But that's far from ideal, as it means they're underpowered and often suffer from traction issues on anything but firm, flat surfaces.

　　Ultimately, this led to the development of open differentials before other, more complex types were developed to overcome more complex driving conditions.

　　In its most basic form, a differential consists of two half shafts, with a gear at each end, connected together by a third gear that forms the three sides of a square. This is usually complemented by a fourth gear for added intensity, a finishing square.

　　This basic unit was then further enhanced by adding a ring gear to the differential case housing the basic core gear - this ring gear allows power to the wheels via a pinion connection to the drive shaft.

　　Our company is Axle Box Gear Factory, welcome to consult!