Outer ball cage
The outer ball cage (professional name: center fixed universal joint) is an important part of the car transmission system. Its role is to transfer the power of the engine from the transmission to the two front wheels through the inner ball cage and the intermediate shaft, driving the car . The outer ball cage is mainly composed of four parts: an outer wheel (bell-shaped cover), an inner wheel (six-star body), a cage, and a steel ball. The torque output by the engine is input through the intermediate shaft and transmitted to the six-star body, and is finally output by the outer spline of the outer wheel to complete the transmission of engine torque.