In terms of the operating principle of the mechanical rotating bearing, it can improve the perfect effect of sliding friction according to the function of different driving mechanical rotation and contraction. In the process of elastic rebound, it can improve the smooth friction in the speed, constant tension can be adjusted in the working principle of the differential shaft. It can promote the rotation program of the complete slip ring and prevent the degree of wear.

First: control the size of the tension

     According to the auxiliary function of the tension spring, it can be adjusted to the tension fluctuation of the expansion block, and it also has an impact on the rotation friction of the differential shaft. Then according to the perfection of the material's winding and unwinding, it can be used in the tension. The difference in adjusting the tension during the smoothness can also avoid the situation that the material is damaged and scrapped when the tension cannot be controlled.