How does differential spider gear kit work

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In a car, the wheels are usually driven by the engine using bevel gears. This allows a 90° deflection of rotational motion from the engine to the wheels. However, if the wheels are rigidly connected by a shared axle, there will be problems when cornering. In this case, the outer wheel must travel a greater distance than the inner wheel. However, since both wheels must travel in circles at the same time, the outer wheel must spin faster than the inner wheel.

If the two wheels were connected by a common shaft, the shaft would twist due to the different rotational speeds. Sooner or later, this twist will be compensated for by slippage in one of the wheels. Not only does this corner slip reduce driving safety, it also causes severe tire wear and, in the long run, axle fractures.

differential spider gear kit

For this reason, in the early days, only one wheel was driven. The other wheel is mounted freely on the shaft so that it can rotate at different speeds. However, this one-way driving results in the fact that the vehicle is trying to steer a slight curve. This not only reduces driving pleasure, but also driving safety. Therefore, it was necessary to find a solution to drive both wheels at the same time, while allowing different speeds: the differential spider gear kit was born.

The design and working principle of the differential spider gear kit is not easy to understand at first glance. The main question is how to come up with such a gear arrangement. For simplicity, it makes sense to first understand the individual steps behind the differential spider gear kit concept.

In the first step, the separate shaft is driven by a pin and a freely rotatable rod.

In the second step, the shaft is driven through a number of pins and a freely rotatable rod.

In the third step, replace the pins and rods with bevel gears.

The fourth step is to drive the shaft through other bevel gears.

In the fifth step, the bevel gears of the differential spider gear kit are arranged symmetrically to avoid bending stress.

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