The invention provides a novel directional
constant velocity ball cage
universal joint. A
steel ball is fixed on the
central line of the input end, and a space track is customized according to a periodic time to be used as the output end. The time and space switching principle is applied, a directional track is overlapped on the
steel ball, and therefore a speed equal to the input speed is obtained. The geometric principle of the novel directional
constant velocity ball cage
universal joint is that a three-dimensional ball is stable and can not move in a three-dimensional mode, three-dimensional movement is generated in a four-dimensional space, the
fourth dimension is time, and walking space of the
steel ball is made according to the periodic time. The overall path of the novel directional ball cage
constant velocity universal joint is a Mobius ring, and the novel directional constant velocity ball cage universal joint turns four times and goes in the reverse direction two times in the process to transfer the turning included angle to a spherical surface. A directional ball cage operates in a three-dimensional mode, and the feature, changing obviously, of the ball cage is that the size and the weight of the ball cage can be lowered by 40%. The output mode of the directional constant velocity ball cage universal joint is that the front face and the back face act in a
coupling mode, the contact effect and the
bearing capacity both are increased in a multiplied mode, the directional constant velocity ball cage universal joint has three complete
degrees of freedom, and no matter how the turning included angle changes, the directional constant velocity ball cage universal joint can keep constant. A star gear works in a suspended mode, and
self consumption can be basically eliminated.