The gap is opened and closed by the gyration of main shaft, which is derived by motor through cone gears.
打开和关闭的差距是由回转主轴，这是通过计算圆锥齿轮马达。
2
The rotating speed and torque are constant during rotation, as compared with cross-shaft coupler under the same radius of gyration, it raises the driving torque about 50%.