Coupling mechanisms are devices that connect two rotating shafts, allowing them to transmit power and motion between them. They are essential in various machines and systems, ensuring that energy flows smoothly from one component to another. Common types of coupling mechanisms include rigid couplings, flexible couplings, and universal joints, each designed for specific applications and requirements. These mechanisms help accommodate misalignment, reduce vibration, and protect equipment from overload. By selecting the appropriate coupling mechanism, engineers can enhance the performance and longevity of machinery, making them crucial in industries such as automotive, manufacturing, and aerospace.