Coaxial Rear Derailleur with Rotating Adapter for Impact Resistance

The patent applies the dynamics principle by making the rear derailleur rotatable relative to the bicycle frame through a threaded connection mechanism. This allows the derailleur to dynamically adjust its position and absorb impacts by rotating, rather than being rigidly fixed. The threaded connection enables controlled movement that maintains alignment while accommodating shocks from uneven terrain, resolving the contradiction between rigid alignment and impact resistance.

The patent implements feedback through the threaded connection mechanism that allows the derailleur to rotate and adjust its position in response to impacts. The mechanism provides continuous adjustment capability, enabling the system to maintain proper alignment by responding to changing conditions. This feedback loop ensures that reliability is improved through adjustability while alignment precision is maintained through controlled, incremental adjustments rather than random movements.

The patent applies preliminary action by pre-tensioning the threaded connection between the adapter nut and mounting portion. The friction-fit interface is designed with predetermined contact surfaces and tension characteristics that provide initial stability. This preliminary configuration ensures that the connection can be easily adjusted through friction while maintaining sufficient strength to withstand operational loads, as the pre-established mechanical interface prevents excessive loosening.